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Comparing Coro/Coro/State.xs (file contents):
Revision 1.114 by root, Thu Nov 30 21:22:45 2006 UTC vs.
Revision 1.248 by root, Mon Sep 29 12:40:50 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39 12
40#include <stdio.h> 13#include <stdio.h>
41#include <errno.h> 14#include <errno.h>
15#include <assert.h>
42 16
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
44# undef STACKGUARD 18# undef setjmp
45#endif 19# undef longjmp
46 20# undef _exit
47#ifndef STACKGUARD 21# define setjmp _setjmp // deep magic, don't ask
48# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
49#endif 24#endif
50 25
51#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
52# include <unistd.h> 27# include <unistd.h>
53# include <sys/mman.h> 28# include <sys/mman.h>
… …
69#else 44#else
70# define PAGESIZE 0 45# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
72#endif 47#endif
73 48
74/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
75 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
76 * and should be unique. */ 51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
85
86/* 5.8.8 */
87#ifndef GV_NOTQUAL
88# define GV_NOTQUAL 0
89#endif
90#ifndef newSV
91# define newSV(l) NEWSV(0,l)
92#endif
93
94/* 5.11 */
95#ifndef CxHASARGS
96# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97#endif
98
99/* 5.8.7 */
100#ifndef SvRV_set
101# define SvRV_set(s,v) SvRV(s) = (v)
102#endif
103
104#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
105# undef CORO_STACKGUARD
106#endif
107
108#ifndef CORO_STACKGUARD
109# define CORO_STACKGUARD 0
110#endif
111
112/* prefer perl internal functions over our own? */
113#ifndef CORO_PREFER_PERL_FUNCTIONS
114# define CORO_PREFER_PERL_FUNCTIONS 0
115#endif
116
117/* The next macros try to return the current stack pointer, in an as
118 * portable way as possible. */
77#define dSTACKLEVEL int stacklevel 119#define dSTACKLEVEL volatile char stacklevel
78#define STACKLEVEL ((void *)&stacklevel) 120#define STACKLEVEL ((void *)&stacklevel)
79 121
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 122#define IN_DESTRUCT (PL_main_cv == Nullcv)
81 123
82#if __GNUC__ >= 3 124#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x) 125# define attribute(x) __attribute__(x)
126# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127# define expect(expr,value) __builtin_expect ((expr),(value))
84#else 128#else
85# define attribute(x) 129# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr)
86#endif 132#endif
133
134#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1)
87 136
88#define NOINLINE attribute ((noinline)) 137#define NOINLINE attribute ((noinline))
89 138
90#include "CoroAPI.h" 139#include "CoroAPI.h"
91
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93 140
94#ifdef USE_ITHREADS 141#ifdef USE_ITHREADS
95static perl_mutex coro_mutex; 142static perl_mutex coro_mutex;
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else 145#else
99# define LOCK (void)0 146# define LOCK (void)0
100# define UNLOCK (void)0 147# define UNLOCK (void)0
101#endif 148#endif
102 149
150/* helper storage struct for Coro::AIO */
151struct io_state
152{
153 int errorno;
154 I32 laststype;
155 int laststatval;
156 Stat_t statcache;
157};
158
159static double (*nvtime)(); /* so why doesn't it take void? */
160
161static size_t coro_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 162static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 163static AV *main_mainstack; /* used to differentiate between $main and others */
164static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 165static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 166static volatile SV *coro_mortal; /* will be freed after next transfer */
167
168static GV *irsgv; /* $/ */
169static GV *stdoutgv; /* *STDOUT */
170static SV *rv_diehook;
171static SV *rv_warnhook;
172static HV *hv_sig; /* %SIG */
173
174/* async_pool helper stuff */
175static SV *sv_pool_rss;
176static SV *sv_pool_size;
177static AV *av_async_pool;
178
179/* Coro::AnyEvent */
180static SV *sv_activity;
107 181
108static struct coro_cctx *cctx_first; 182static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 183static int cctx_count, cctx_idle;
184
185enum {
186 CC_MAPPED = 0x01,
187 CC_NOREUSE = 0x02, /* throw this away after tracing */
188 CC_TRACE = 0x04,
189 CC_TRACE_SUB = 0x08, /* trace sub calls */
190 CC_TRACE_LINE = 0x10, /* trace each statement */
191 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
192};
110 193
111/* this is a structure representing a c-level coroutine */ 194/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 195typedef struct coro_cctx {
113 struct coro_cctx *next; 196 struct coro_cctx *next;
114 197
115 /* the stack */ 198 /* the stack */
116 void *sptr; 199 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 200 size_t ssize;
118 201
119 /* cpu state */ 202 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 203 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
204 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121 JMPENV *top_env; 205 JMPENV *top_env;
122 coro_context cctx; 206 coro_context cctx;
123 207
124 int inuse;
125
126#if USE_VALGRIND 208#if CORO_USE_VALGRIND
127 int valgrind_id; 209 int valgrind_id;
128#endif 210#endif
211 unsigned char flags;
129} coro_cctx; 212} coro_cctx;
130 213
131enum { 214enum {
132 CF_RUNNING, /* coroutine is running */ 215 CF_RUNNING = 0x0001, /* coroutine is running */
133 CF_READY, /* coroutine is ready */ 216 CF_READY = 0x0002, /* coroutine is ready */
217 CF_NEW = 0x0004, /* has never been switched to */
218 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134}; 219};
220
221/* the structure where most of the perl state is stored, overlaid on the cxstack */
222typedef struct {
223 SV *defsv;
224 AV *defav;
225 SV *errsv;
226 SV *irsgv;
227#define VAR(name,type) type name;
228# include "state.h"
229#undef VAR
230} perl_slots;
231
232#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
135 233
136/* this is a structure representing a perl-level coroutine */ 234/* this is a structure representing a perl-level coroutine */
137struct coro { 235struct coro {
138 /* the c coroutine allocated to this perl coroutine, if any */ 236 /* the c coroutine allocated to this perl coroutine, if any */
139 coro_cctx *cctx; 237 coro_cctx *cctx;
140 238
239 /* process data */
240 AV *mainstack;
241 perl_slots *slot; /* basically the saved sp */
242
141 /* data associated with this coroutine (initial args) */ 243 AV *args; /* data associated with this coroutine (initial args) */
142 AV *args; 244 int refcnt; /* coroutines are refcounted, yes */
143 int refcnt; 245 int flags; /* CF_ flags */
144 int flags; 246 HV *hv; /* the perl hash associated with this coro, if any */
145 247
146 /* optionally saved, might be zero */ 248 /* statistics */
147 AV *defav; 249 int usecount; /* number of transfers to this coro */
148 SV *defsv;
149 SV *errsv;
150
151#define VAR(name,type) type name;
152# include "state.h"
153#undef VAR
154 250
155 /* coro process data */ 251 /* coro process data */
156 int prio; 252 int prio;
253 SV *throw; /* exception to be thrown */
254
255 /* async_pool */
256 SV *saved_deffh;
257
258 /* linked list */
259 struct coro *next, *prev;
157}; 260};
158 261
159typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
160typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
161 264
265/** Coro ********************************************************************/
266
267#define PRIO_MAX 3
268#define PRIO_HIGH 1
269#define PRIO_NORMAL 0
270#define PRIO_LOW -1
271#define PRIO_IDLE -3
272#define PRIO_MIN -4
273
274/* for Coro.pm */
275static SV *coro_current;
276static SV *coro_readyhook;
277static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
278static int coro_nready;
279static struct coro *coro_first;
280
281/** lowlevel stuff **********************************************************/
282
283static SV *
284coro_get_sv (pTHX_ const char *name, int create)
285{
286#if PERL_VERSION_ATLEAST (5,10,0)
287 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
288 get_sv (name, create);
289#endif
290 return get_sv (name, create);
291}
292
162static AV * 293static AV *
294coro_get_av (pTHX_ const char *name, int create)
295{
296#if PERL_VERSION_ATLEAST (5,10,0)
297 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
298 get_av (name, create);
299#endif
300 return get_av (name, create);
301}
302
303static HV *
304coro_get_hv (pTHX_ const char *name, int create)
305{
306#if PERL_VERSION_ATLEAST (5,10,0)
307 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
308 get_hv (name, create);
309#endif
310 return get_hv (name, create);
311}
312
313static AV *
163coro_clone_padlist (CV *cv) 314coro_clone_padlist (pTHX_ CV *cv)
164{ 315{
165 AV *padlist = CvPADLIST (cv); 316 AV *padlist = CvPADLIST (cv);
166 AV *newpadlist, *newpad; 317 AV *newpadlist, *newpad;
167 318
168 newpadlist = newAV (); 319 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 320 AvREAL_off (newpadlist);
170#if PERL_VERSION_ATLEAST (5,9,0) 321#if PERL_VERSION_ATLEAST (5,10,0)
171 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 322 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172#else 323#else
173 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 324 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
174#endif 325#endif
175 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 326 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
… …
180 331
181 return newpadlist; 332 return newpadlist;
182} 333}
183 334
184static void 335static void
185free_padlist (AV *padlist) 336free_padlist (pTHX_ AV *padlist)
186{ 337{
187 /* may be during global destruction */ 338 /* may be during global destruction */
188 if (SvREFCNT (padlist)) 339 if (SvREFCNT (padlist))
189 { 340 {
190 I32 i = AvFILLp (padlist); 341 I32 i = AvFILLp (padlist);
… …
211 AV *padlist; 362 AV *padlist;
212 AV *av = (AV *)mg->mg_obj; 363 AV *av = (AV *)mg->mg_obj;
213 364
214 /* casting is fun. */ 365 /* casting is fun. */
215 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 366 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216 free_padlist (padlist); 367 free_padlist (aTHX_ padlist);
217 368
218 SvREFCNT_dec (av); 369 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
219 370
220 return 0; 371 return 0;
221} 372}
222 373
223#define PERL_MAGIC_coro PERL_MAGIC_ext 374#define CORO_MAGIC_type_cv PERL_MAGIC_ext
375#define CORO_MAGIC_type_state PERL_MAGIC_ext
224 376
225static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 377static MGVTBL coro_cv_vtbl = {
378 0, 0, 0, 0,
379 coro_cv_free
380};
226 381
227#define CORO_MAGIC(cv) \ 382#define CORO_MAGIC(sv,type) \
228 SvMAGIC (cv) \ 383 SvMAGIC (sv) \
229 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \ 384 ? SvMAGIC (sv)->mg_type == type \
230 ? SvMAGIC (cv) \ 385 ? SvMAGIC (sv) \
231 : mg_find ((SV *)cv, PERL_MAGIC_coro) \ 386 : mg_find (sv, type) \
232 : 0 387 : 0
388
389#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
390#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
391
392static struct coro *
393SvSTATE_ (pTHX_ SV *coro)
394{
395 HV *stash;
396 MAGIC *mg;
397
398 if (SvROK (coro))
399 coro = SvRV (coro);
400
401 if (expect_false (SvTYPE (coro) != SVt_PVHV))
402 croak ("Coro::State object required");
403
404 stash = SvSTASH (coro);
405 if (expect_false (stash != coro_stash && stash != coro_state_stash))
406 {
407 /* very slow, but rare, check */
408 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
409 croak ("Coro::State object required");
410 }
411
412 mg = CORO_MAGIC_state (coro);
413 return (struct coro *)mg->mg_ptr;
414}
415
416#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
233 417
234/* the next two functions merely cache the padlists */ 418/* the next two functions merely cache the padlists */
235static void 419static void
236get_padlist (CV *cv) 420get_padlist (pTHX_ CV *cv)
237{ 421{
238 MAGIC *mg = CORO_MAGIC (cv); 422 MAGIC *mg = CORO_MAGIC_cv (cv);
239 AV *av; 423 AV *av;
240 424
241 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0) 425 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--]; 426 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 427 else
244 { 428 {
245#if 0 429#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 430 /* this is probably cleaner? but also slower! */
431 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 432 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 433 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 434 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 435 SvREFCNT_dec (cp);
251#else 436#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 437 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 438#endif
254 } 439 }
255} 440}
256 441
257static void 442static void
258put_padlist (CV *cv) 443put_padlist (pTHX_ CV *cv)
259{ 444{
260 MAGIC *mg = CORO_MAGIC (cv); 445 MAGIC *mg = CORO_MAGIC_cv (cv);
261 AV *av; 446 AV *av;
262 447
263 if (!mg) 448 if (expect_false (!mg))
264 { 449 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
265 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
266 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
267 mg->mg_virtual = &vtbl_coro;
268 mg->mg_obj = (SV *)newAV ();
269 }
270 450
271 av = (AV *)mg->mg_obj; 451 av = (AV *)mg->mg_obj;
272 452
273 if (AvFILLp (av) >= AvMAX (av)) 453 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274 av_extend (av, AvMAX (av) + 1); 454 av_extend (av, AvMAX (av) + 1);
275 455
276 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv); 456 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277} 457}
278 458
279#define SB do { 459/** load & save, init *******************************************************/
280#define SE } while (0)
281
282#define LOAD(state) load_state((state));
283#define SAVE(state,flags) save_state((state),(flags));
284
285#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
286 460
287static void 461static void
288load_state(Coro__State c) 462load_perl (pTHX_ Coro__State c)
289{ 463{
464 perl_slots *slot = c->slot;
465 c->slot = 0;
466
467 PL_mainstack = c->mainstack;
468
469 GvSV (PL_defgv) = slot->defsv;
470 GvAV (PL_defgv) = slot->defav;
471 GvSV (PL_errgv) = slot->errsv;
472 GvSV (irsgv) = slot->irsgv;
473
290#define VAR(name,type) PL_ ## name = c->name; 474 #define VAR(name,type) PL_ ## name = slot->name;
291# include "state.h" 475 # include "state.h"
292#undef VAR 476 #undef VAR
293
294 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
297 477
298 { 478 {
299 dSP; 479 dSP;
480
300 CV *cv; 481 CV *cv;
301 482
302 /* now do the ugly restore mess */ 483 /* now do the ugly restore mess */
303 while ((cv = (CV *)POPs)) 484 while (expect_true (cv = (CV *)POPs))
304 { 485 {
305 put_padlist (cv); /* mark this padlist as available */ 486 put_padlist (aTHX_ cv); /* mark this padlist as available */
306 CvDEPTH (cv) = PTR2IV (POPs); 487 CvDEPTH (cv) = PTR2IV (POPs);
307 CvPADLIST (cv) = (AV *)POPs; 488 CvPADLIST (cv) = (AV *)POPs;
308 } 489 }
309 490
310 PUTBACK; 491 PUTBACK;
311 } 492 }
312} 493}
313 494
314static void 495static void
315save_state(Coro__State c, int flags) 496save_perl (pTHX_ Coro__State c)
316{ 497{
317 { 498 {
318 dSP; 499 dSP;
319 I32 cxix = cxstack_ix; 500 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 501 PERL_CONTEXT *ccstk = cxstack;
… …
323 /* 504 /*
324 * the worst thing you can imagine happens first - we have to save 505 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 506 * (and reinitialize) all cv's in the whole callchain :(
326 */ 507 */
327 508
328 PUSHs (Nullsv); 509 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 510 /* this loop was inspired by pp_caller */
330 for (;;) 511 for (;;)
331 { 512 {
332 while (cxix >= 0) 513 while (expect_true (cxix >= 0))
333 { 514 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 515 PERL_CONTEXT *cx = &ccstk[cxix--];
335 516
336 if (CxTYPE(cx) == CXt_SUB) 517 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337 { 518 {
338 CV *cv = cx->blk_sub.cv; 519 CV *cv = cx->blk_sub.cv;
339 520
340 if (CvDEPTH (cv)) 521 if (expect_true (CvDEPTH (cv)))
341 { 522 {
342 EXTEND (SP, 3); 523 EXTEND (SP, 3);
343
344 PUSHs ((SV *)CvPADLIST(cv)); 524 PUSHs ((SV *)CvPADLIST (cv));
345 PUSHs (INT2PTR (SV *, CvDEPTH (cv))); 525 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
346 PUSHs ((SV *)cv); 526 PUSHs ((SV *)cv);
347 527
348 CvDEPTH (cv) = 0; 528 CvDEPTH (cv) = 0;
349 get_padlist (cv); 529 get_padlist (aTHX_ cv);
350 } 530 }
351 } 531 }
352#ifdef CXt_FORMAT
353 else if (CxTYPE(cx) == CXt_FORMAT)
354 {
355 /* I never used formats, so how should I know how these are implemented? */
356 /* my bold guess is as a simple, plain sub... */
357 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358 }
359#endif
360 } 532 }
361 533
362 if (top_si->si_type == PERLSI_MAIN) 534 if (expect_true (top_si->si_type == PERLSI_MAIN))
363 break; 535 break;
364 536
365 top_si = top_si->si_prev; 537 top_si = top_si->si_prev;
366 ccstk = top_si->si_cxstack; 538 ccstk = top_si->si_cxstack;
367 cxix = top_si->si_cxix; 539 cxix = top_si->si_cxix;
368 } 540 }
369 541
370 PUTBACK; 542 PUTBACK;
371 } 543 }
372 544
373 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 545 /* allocate some space on the context stack for our purposes */
374 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 546 /* we manually unroll here, as usually 2 slots is enough */
375 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 547 if (SLOT_COUNT >= 1) CXINC;
548 if (SLOT_COUNT >= 2) CXINC;
549 if (SLOT_COUNT >= 3) CXINC;
550 {
551 int i;
552 for (i = 3; i < SLOT_COUNT; ++i)
553 CXINC;
554 }
555 cxstack_ix -= SLOT_COUNT; /* undo allocation */
376 556
557 c->mainstack = PL_mainstack;
558
559 {
560 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
561
562 slot->defav = GvAV (PL_defgv);
563 slot->defsv = DEFSV;
564 slot->errsv = ERRSV;
565 slot->irsgv = GvSV (irsgv);
566
377#define VAR(name,type)c->name = PL_ ## name; 567 #define VAR(name,type) slot->name = PL_ ## name;
378# include "state.h" 568 # include "state.h"
379#undef VAR 569 #undef VAR
570 }
380} 571}
381 572
382/* 573/*
383 * allocate various perl stacks. This is an exact copy 574 * allocate various perl stacks. This is an exact copy
384 * of perl.c:init_stacks, except that it uses less memory 575 * of perl.c:init_stacks, except that it uses less memory
385 * on the (sometimes correct) assumption that coroutines do 576 * on the (sometimes correct) assumption that coroutines do
386 * not usually need a lot of stackspace. 577 * not usually need a lot of stackspace.
387 */ 578 */
579#if CORO_PREFER_PERL_FUNCTIONS
580# define coro_init_stacks init_stacks
581#else
388static void 582static void
389coro_init_stacks () 583coro_init_stacks (pTHX)
390{ 584{
391 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 585 PL_curstackinfo = new_stackinfo(32, 8);
392 PL_curstackinfo->si_type = PERLSI_MAIN; 586 PL_curstackinfo->si_type = PERLSI_MAIN;
393 PL_curstack = PL_curstackinfo->si_stack; 587 PL_curstack = PL_curstackinfo->si_stack;
394 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 588 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395 589
396 PL_stack_base = AvARRAY(PL_curstack); 590 PL_stack_base = AvARRAY(PL_curstack);
397 PL_stack_sp = PL_stack_base; 591 PL_stack_sp = PL_stack_base;
398 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 592 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399 593
400 New(50,PL_tmps_stack,96,SV*); 594 New(50,PL_tmps_stack,32,SV*);
401 PL_tmps_floor = -1; 595 PL_tmps_floor = -1;
402 PL_tmps_ix = -1; 596 PL_tmps_ix = -1;
403 PL_tmps_max = 96; 597 PL_tmps_max = 32;
404 598
405 New(54,PL_markstack,16,I32); 599 New(54,PL_markstack,16,I32);
406 PL_markstack_ptr = PL_markstack; 600 PL_markstack_ptr = PL_markstack;
407 PL_markstack_max = PL_markstack + 16; 601 PL_markstack_max = PL_markstack + 16;
408 602
409#ifdef SET_MARK_OFFSET 603#ifdef SET_MARK_OFFSET
410 SET_MARK_OFFSET; 604 SET_MARK_OFFSET;
411#endif 605#endif
412 606
413 New(54,PL_scopestack,16,I32); 607 New(54,PL_scopestack,8,I32);
414 PL_scopestack_ix = 0; 608 PL_scopestack_ix = 0;
415 PL_scopestack_max = 16; 609 PL_scopestack_max = 8;
416 610
417 New(54,PL_savestack,96,ANY); 611 New(54,PL_savestack,24,ANY);
418 PL_savestack_ix = 0; 612 PL_savestack_ix = 0;
419 PL_savestack_max = 96; 613 PL_savestack_max = 24;
420 614
421#if !PERL_VERSION_ATLEAST (5,9,0) 615#if !PERL_VERSION_ATLEAST (5,10,0)
422 New(54,PL_retstack,8,OP*); 616 New(54,PL_retstack,4,OP*);
423 PL_retstack_ix = 0; 617 PL_retstack_ix = 0;
424 PL_retstack_max = 8; 618 PL_retstack_max = 4;
425#endif 619#endif
426} 620}
621#endif
427 622
428/* 623/*
429 * destroy the stacks, the callchain etc... 624 * destroy the stacks, the callchain etc...
430 */ 625 */
431static void 626static void
432coro_destroy_stacks () 627coro_destroy_stacks (pTHX)
433{ 628{
434 if (!IN_DESTRUCT)
435 {
436 /* is this ugly, I ask? */
437 LEAVE_SCOPE (0);
438
439 /* sure it is, but more important: is it correct?? :/ */
440 FREETMPS;
441
442 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
443 }
444
445 while (PL_curstackinfo->si_next) 629 while (PL_curstackinfo->si_next)
446 PL_curstackinfo = PL_curstackinfo->si_next; 630 PL_curstackinfo = PL_curstackinfo->si_next;
447 631
448 while (PL_curstackinfo) 632 while (PL_curstackinfo)
449 { 633 {
450 PERL_SI *p = PL_curstackinfo->si_prev; 634 PERL_SI *p = PL_curstackinfo->si_prev;
451 635
452 { /*D*//*remove*/
453 dSP;
454 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455 PUTBACK; /* possibly superfluous */
456 }
457
458 if (!IN_DESTRUCT) 636 if (!IN_DESTRUCT)
459 {
460 dounwind (-1);/*D*//*remove*/
461 SvREFCNT_dec (PL_curstackinfo->si_stack); 637 SvREFCNT_dec (PL_curstackinfo->si_stack);
462 }
463 638
464 Safefree (PL_curstackinfo->si_cxstack); 639 Safefree (PL_curstackinfo->si_cxstack);
465 Safefree (PL_curstackinfo); 640 Safefree (PL_curstackinfo);
466 PL_curstackinfo = p; 641 PL_curstackinfo = p;
467 } 642 }
468 643
469 Safefree (PL_tmps_stack); 644 Safefree (PL_tmps_stack);
470 Safefree (PL_markstack); 645 Safefree (PL_markstack);
471 Safefree (PL_scopestack); 646 Safefree (PL_scopestack);
472 Safefree (PL_savestack); 647 Safefree (PL_savestack);
473#if !PERL_VERSION_ATLEAST (5,9,0) 648#if !PERL_VERSION_ATLEAST (5,10,0)
474 Safefree (PL_retstack); 649 Safefree (PL_retstack);
475#endif 650#endif
476} 651}
477 652
653static size_t
654coro_rss (pTHX_ struct coro *coro)
655{
656 size_t rss = sizeof (*coro);
657
658 if (coro->mainstack)
659 {
660 perl_slots tmp_slot;
661 perl_slots *slot;
662
663 if (coro->flags & CF_RUNNING)
664 {
665 slot = &tmp_slot;
666
667 #define VAR(name,type) slot->name = PL_ ## name;
668 # include "state.h"
669 #undef VAR
670 }
671 else
672 slot = coro->slot;
673
674 if (slot)
675 {
676 rss += sizeof (slot->curstackinfo);
677 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
678 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
679 rss += slot->tmps_max * sizeof (SV *);
680 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
681 rss += slot->scopestack_max * sizeof (I32);
682 rss += slot->savestack_max * sizeof (ANY);
683
684#if !PERL_VERSION_ATLEAST (5,10,0)
685 rss += slot->retstack_max * sizeof (OP *);
686#endif
687 }
688 }
689
690 return rss;
691}
692
693/** coroutine stack handling ************************************************/
694
695static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
696static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
697static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
698
699/* apparently < 5.8.8 */
700#ifndef MgPV_nolen_const
701#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
702 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
703 (const char*)(mg)->mg_ptr)
704#endif
705
706/*
707 * This overrides the default magic get method of %SIG elements.
708 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
709 * and instead of tryign to save and restore the hash elements, we just provide
710 * readback here.
711 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
712 * not expecting this to actually change the hook. This is a potential problem
713 * when a schedule happens then, but we ignore this.
714 */
715static int
716coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
717{
718 const char *s = MgPV_nolen_const (mg);
719
720 if (*s == '_')
721 {
722 SV **svp = 0;
723
724 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
725 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
726
727 if (svp)
728 {
729 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
730 return 0;
731 }
732 }
733
734 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
735}
736
737static int
738coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
739{
740 const char *s = MgPV_nolen_const (mg);
741
742 if (*s == '_')
743 {
744 SV **svp = 0;
745
746 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
747 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
748
749 if (svp)
750 {
751 SV *old = *svp;
752 *svp = 0;
753 SvREFCNT_dec (old);
754 return 0;
755 }
756 }
757
758 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
759}
760
761static int
762coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
763{
764 const char *s = MgPV_nolen_const (mg);
765
766 if (*s == '_')
767 {
768 SV **svp = 0;
769
770 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
771 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
772
773 if (svp)
774 {
775 SV *old = *svp;
776 *svp = newSVsv (sv);
777 SvREFCNT_dec (old);
778 return 0;
779 }
780 }
781
782 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
783}
784
478static void 785static void
479setup_coro (struct coro *coro) 786coro_setup (pTHX_ struct coro *coro)
480{ 787{
481 /* 788 /*
482 * emulate part of the perl startup here. 789 * emulate part of the perl startup here.
483 */ 790 */
484
485 coro_init_stacks (); 791 coro_init_stacks (aTHX);
486 792
793 PL_runops = RUNOPS_DEFAULT;
794 PL_curcop = &PL_compiling;
795 PL_in_eval = EVAL_NULL;
487 PL_curcop = 0; 796 PL_comppad = 0;
488 PL_in_eval = 0;
489 PL_curpm = 0; 797 PL_curpm = 0;
798 PL_curpad = 0;
799 PL_localizing = 0;
800 PL_dirty = 0;
801 PL_restartop = 0;
802#if PERL_VERSION_ATLEAST (5,10,0)
803 PL_parser = 0;
804#endif
805
806 /* recreate the die/warn hooks */
807 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
808 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
809
810 GvSV (PL_defgv) = newSV (0);
811 GvAV (PL_defgv) = coro->args; coro->args = 0;
812 GvSV (PL_errgv) = newSV (0);
813 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
814 PL_rs = newSVsv (GvSV (irsgv));
815 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
490 816
491 { 817 {
492 dSP; 818 dSP;
493 LOGOP myop; 819 LOGOP myop;
494 820
495 /* I have no idea why this is needed, but it is */
496 PUSHMARK (SP);
497
498 SvREFCNT_dec (GvAV (PL_defgv));
499 GvAV (PL_defgv) = coro->args; coro->args = 0;
500
501 Zero (&myop, 1, LOGOP); 821 Zero (&myop, 1, LOGOP);
502 myop.op_next = Nullop; 822 myop.op_next = Nullop;
503 myop.op_flags = OPf_WANT_VOID; 823 myop.op_flags = OPf_WANT_VOID;
504 824
825 PUSHMARK (SP);
826 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
827 PUTBACK;
505 PL_op = (OP *)&myop; 828 PL_op = (OP *)&myop;
506
507 PUSHMARK (SP);
508 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509 PUTBACK;
510 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 829 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511 SPAGAIN; 830 SPAGAIN;
512
513 ENTER; /* necessary e.g. for dounwind */
514 } 831 }
832
833 /* this newly created coroutine might be run on an existing cctx which most
834 * likely was suspended in set_stacklevel, called from entersub.
835 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
836 * so we ENTER here for symmetry
837 */
838 ENTER;
515} 839}
516 840
517static void 841static void
842coro_destroy (pTHX_ struct coro *coro)
843{
844 if (!IN_DESTRUCT)
845 {
846 /* restore all saved variables and stuff */
847 LEAVE_SCOPE (0);
848 assert (PL_tmps_floor == -1);
849
850 /* free all temporaries */
851 FREETMPS;
852 assert (PL_tmps_ix == -1);
853
854 /* unwind all extra stacks */
855 POPSTACK_TO (PL_mainstack);
856
857 /* unwind main stack */
858 dounwind (-1);
859 }
860
861 SvREFCNT_dec (GvSV (PL_defgv));
862 SvREFCNT_dec (GvAV (PL_defgv));
863 SvREFCNT_dec (GvSV (PL_errgv));
864 SvREFCNT_dec (PL_defoutgv);
865 SvREFCNT_dec (PL_rs);
866 SvREFCNT_dec (GvSV (irsgv));
867
868 SvREFCNT_dec (PL_diehook);
869 SvREFCNT_dec (PL_warnhook);
870
871 SvREFCNT_dec (coro->saved_deffh);
872 SvREFCNT_dec (coro->throw);
873
874 coro_destroy_stacks (aTHX);
875}
876
877static void
518free_coro_mortal () 878free_coro_mortal (pTHX)
519{ 879{
520 if (coro_mortal) 880 if (expect_true (coro_mortal))
521 { 881 {
522 SvREFCNT_dec (coro_mortal); 882 SvREFCNT_dec (coro_mortal);
523 coro_mortal = 0; 883 coro_mortal = 0;
524 } 884 }
525} 885}
526 886
887static int
888runops_trace (pTHX)
889{
890 COP *oldcop = 0;
891 int oldcxix = -2;
892 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
893 coro_cctx *cctx = coro->cctx;
894
895 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
896 {
897 PERL_ASYNC_CHECK ();
898
899 if (cctx->flags & CC_TRACE_ALL)
900 {
901 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
902 {
903 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
904 SV **bot, **top;
905 AV *av = newAV (); /* return values */
906 SV **cb;
907 dSP;
908
909 GV *gv = CvGV (cx->blk_sub.cv);
910 SV *fullname = sv_2mortal (newSV (0));
911 if (isGV (gv))
912 gv_efullname3 (fullname, gv, 0);
913
914 bot = PL_stack_base + cx->blk_oldsp + 1;
915 top = cx->blk_gimme == G_ARRAY ? SP + 1
916 : cx->blk_gimme == G_SCALAR ? bot + 1
917 : bot;
918
919 av_extend (av, top - bot);
920 while (bot < top)
921 av_push (av, SvREFCNT_inc (*bot++));
922
923 PL_runops = RUNOPS_DEFAULT;
924 ENTER;
925 SAVETMPS;
926 EXTEND (SP, 3);
927 PUSHMARK (SP);
928 PUSHs (&PL_sv_no);
929 PUSHs (fullname);
930 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
931 PUTBACK;
932 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
933 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
934 SPAGAIN;
935 FREETMPS;
936 LEAVE;
937 PL_runops = runops_trace;
938 }
939
940 if (oldcop != PL_curcop)
941 {
942 oldcop = PL_curcop;
943
944 if (PL_curcop != &PL_compiling)
945 {
946 SV **cb;
947
948 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
949 {
950 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
951
952 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
953 {
954 runops_proc_t old_runops = PL_runops;
955 dSP;
956 GV *gv = CvGV (cx->blk_sub.cv);
957 SV *fullname = sv_2mortal (newSV (0));
958
959 if (isGV (gv))
960 gv_efullname3 (fullname, gv, 0);
961
962 PL_runops = RUNOPS_DEFAULT;
963 ENTER;
964 SAVETMPS;
965 EXTEND (SP, 3);
966 PUSHMARK (SP);
967 PUSHs (&PL_sv_yes);
968 PUSHs (fullname);
969 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
970 PUTBACK;
971 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
972 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
973 SPAGAIN;
974 FREETMPS;
975 LEAVE;
976 PL_runops = runops_trace;
977 }
978
979 oldcxix = cxstack_ix;
980 }
981
982 if (cctx->flags & CC_TRACE_LINE)
983 {
984 dSP;
985
986 PL_runops = RUNOPS_DEFAULT;
987 ENTER;
988 SAVETMPS;
989 EXTEND (SP, 3);
990 PL_runops = RUNOPS_DEFAULT;
991 PUSHMARK (SP);
992 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
993 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
994 PUTBACK;
995 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
996 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
997 SPAGAIN;
998 FREETMPS;
999 LEAVE;
1000 PL_runops = runops_trace;
1001 }
1002 }
1003 }
1004 }
1005 }
1006
1007 TAINT_NOT;
1008 return 0;
1009}
1010
1011/* inject a fake call to Coro::State::_cctx_init into the execution */
1012/* _cctx_init should be careful, as it could be called at almost any time */
1013/* during execution of a perl program */
527static void NOINLINE 1014static void NOINLINE
528prepare_cctx (coro_cctx *cctx) 1015cctx_prepare (pTHX_ coro_cctx *cctx)
529{ 1016{
530 dSP; 1017 dSP;
531 LOGOP myop; 1018 LOGOP myop;
532 1019
1020 PL_top_env = &PL_start_env;
1021
1022 if (cctx->flags & CC_TRACE)
1023 PL_runops = runops_trace;
1024
533 Zero (&myop, 1, LOGOP); 1025 Zero (&myop, 1, LOGOP);
534 myop.op_next = PL_op; 1026 myop.op_next = PL_op;
535 myop.op_flags = OPf_WANT_VOID; 1027 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538 1028
539 PUSHMARK (SP); 1029 PUSHMARK (SP);
1030 EXTEND (SP, 2);
1031 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE)); 1032 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541 PUTBACK; 1033 PUTBACK;
1034 PL_op = (OP *)&myop;
542 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1035 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543 SPAGAIN; 1036 SPAGAIN;
544} 1037}
545 1038
1039/*
1040 * this is a _very_ stripped down perl interpreter ;)
1041 */
546static void 1042static void
547coro_run (void *arg) 1043cctx_run (void *arg)
548{ 1044{
1045 dTHX;
1046
549 /* coro_run is the alternative epilogue of transfer() */ 1047 /* cctx_run is the alternative tail of transfer(), so unlock here. */
550 UNLOCK; 1048 UNLOCK;
551 1049
1050 /* we now skip the entersub that lead to transfer() */
1051 PL_op = PL_op->op_next;
1052
1053 /* inject a fake subroutine call to cctx_init */
1054 cctx_prepare (aTHX_ (coro_cctx *)arg);
1055
1056 /* somebody or something will hit me for both perl_run and PL_restartop */
1057 PL_restartop = PL_op;
1058 perl_run (PL_curinterp);
1059
552 /* 1060 /*
553 * this is a _very_ stripped down perl interpreter ;) 1061 * If perl-run returns we assume exit() was being called or the coro
1062 * fell off the end, which seems to be the only valid (non-bug)
1063 * reason for perl_run to return. We try to exit by jumping to the
1064 * bootstrap-time "top" top_env, as we cannot restore the "main"
1065 * coroutine as Coro has no such concept
554 */ 1066 */
555 PL_top_env = &PL_start_env; 1067 PL_top_env = main_top_env;
556 1068 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
557 /* inject call to cctx_init */
558 prepare_cctx ((coro_cctx *)arg);
559
560 /* somebody will hit me for both perl_run and PL_restartop */
561 perl_run (PL_curinterp);
562
563 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
564 abort ();
565} 1069}
566 1070
567static coro_cctx * 1071static coro_cctx *
568cctx_new () 1072cctx_new ()
569{ 1073{
570 coro_cctx *cctx; 1074 coro_cctx *cctx;
1075 void *stack_start;
1076 size_t stack_size;
571 1077
572 ++cctx_count; 1078 ++cctx_count;
573 1079
574 New (0, cctx, 1, coro_cctx); 1080 Newz (0, cctx, 1, coro_cctx);
575 1081
576#if HAVE_MMAP 1082#if HAVE_MMAP
577
578 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1083 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579 /* mmap suppsedly does allocate-on-write for us */ 1084 /* mmap supposedly does allocate-on-write for us */
580 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1085 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581 1086
582 if (cctx->sptr == (void *)-1) 1087 if (cctx->sptr != (void *)-1)
583 {
584 perror ("FATAL: unable to mmap stack for coroutine");
585 _exit (EXIT_FAILURE);
586 } 1088 {
587
588# if STACKGUARD 1089# if CORO_STACKGUARD
589 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1090 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590# endif 1091# endif
1092 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1093 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1094 cctx->flags |= CC_MAPPED;
1095 }
1096 else
1097#endif
1098 {
1099 cctx->ssize = coro_stacksize * (long)sizeof (long);
1100 New (0, cctx->sptr, coro_stacksize, long);
591 1101
592#else
593
594 cctx->ssize = STACKSIZE * (long)sizeof (long);
595 New (0, cctx->sptr, STACKSIZE, long);
596
597 if (!cctx->sptr) 1102 if (!cctx->sptr)
598 { 1103 {
599 perror ("FATAL: unable to malloc stack for coroutine"); 1104 perror ("FATAL: unable to allocate stack for coroutine");
600 _exit (EXIT_FAILURE); 1105 _exit (EXIT_FAILURE);
601 } 1106 }
602 1107
603#endif 1108 stack_start = cctx->sptr;
1109 stack_size = cctx->ssize;
1110 }
604 1111
605#if USE_VALGRIND 1112 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
606 cctx->valgrind_id = VALGRIND_STACK_REGISTER ( 1113 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
607 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608 cctx->ssize + (char *)cctx->sptr
609 );
610#endif
611
612 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
613 1114
614 return cctx; 1115 return cctx;
615} 1116}
616 1117
617static void 1118static void
618cctx_free (coro_cctx *cctx) 1119cctx_destroy (coro_cctx *cctx)
619{ 1120{
620 if (!cctx) 1121 if (!cctx)
621 return; 1122 return;
622 1123
623 --cctx_count; 1124 --cctx_count;
624 1125
625#if USE_VALGRIND 1126#if CORO_USE_VALGRIND
626 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1127 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627#endif 1128#endif
628 1129
629#if HAVE_MMAP 1130#if HAVE_MMAP
1131 if (cctx->flags & CC_MAPPED)
630 munmap (cctx->sptr, cctx->ssize); 1132 munmap (cctx->sptr, cctx->ssize);
631#else 1133 else
1134#endif
632 Safefree (cctx->sptr); 1135 Safefree (cctx->sptr);
633#endif
634 1136
635 Safefree (cctx); 1137 Safefree (cctx);
636} 1138}
637 1139
1140/* wether this cctx should be destructed */
1141#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1142
638static coro_cctx * 1143static coro_cctx *
639cctx_get () 1144cctx_get (pTHX)
640{ 1145{
641 coro_cctx *cctx; 1146 while (expect_true (cctx_first))
642
643 if (cctx_first)
644 { 1147 {
1148 coro_cctx *cctx = cctx_first;
1149 cctx_first = cctx->next;
645 --cctx_idle; 1150 --cctx_idle;
646 cctx = cctx_first; 1151
647 cctx_first = cctx->next; 1152 if (expect_true (!CCTX_EXPIRED (cctx)))
648 } 1153 return cctx;
649 else 1154
650 { 1155 cctx_destroy (cctx);
651 cctx = cctx_new ();
652 PL_op = PL_op->op_next;
653 } 1156 }
654 1157
655 return cctx; 1158 return cctx_new ();
656} 1159}
657 1160
658static void 1161static void
659cctx_put (coro_cctx *cctx) 1162cctx_put (coro_cctx *cctx)
660{ 1163{
1164 /* free another cctx if overlimit */
1165 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1166 {
1167 coro_cctx *first = cctx_first;
1168 cctx_first = first->next;
1169 --cctx_idle;
1170
1171 cctx_destroy (first);
1172 }
1173
661 ++cctx_idle; 1174 ++cctx_idle;
662 cctx->next = cctx_first; 1175 cctx->next = cctx_first;
663 cctx_first = cctx; 1176 cctx_first = cctx;
664} 1177}
665 1178
666/* never call directly, always through the coro_state_transfer global variable */ 1179/** coroutine switching *****************************************************/
1180
1181static void
1182transfer_check (pTHX_ struct coro *prev, struct coro *next)
1183{
1184 if (expect_true (prev != next))
1185 {
1186 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1187 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1188
1189 if (expect_false (next->flags & CF_RUNNING))
1190 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1191
1192 if (expect_false (next->flags & CF_DESTROYED))
1193 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1194
1195#if !PERL_VERSION_ATLEAST (5,10,0)
1196 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1197 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1198#endif
1199 }
1200}
1201
1202/* always use the TRANSFER macro */
667static void NOINLINE 1203static void NOINLINE
668transfer (struct coro *prev, struct coro *next, int flags) 1204transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
669{ 1205{
670 dSTACKLEVEL; 1206 dSTACKLEVEL;
1207 static volatile int has_throw;
671 1208
672 /* sometimes transfer is only called to set idle_sp */ 1209 /* sometimes transfer is only called to set idle_sp */
673 if (flags == TRANSFER_SET_STACKLEVEL) 1210 if (expect_false (!next))
1211 {
674 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1212 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1213 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1214 }
675 else if (prev != next) 1215 else if (expect_true (prev != next))
676 { 1216 {
677 coro_cctx *prev__cctx; 1217 coro_cctx *prev__cctx;
678 1218
679 if (!prev->cctx) 1219 if (expect_false (prev->flags & CF_NEW))
680 { 1220 {
681 /* create a new empty context */ 1221 /* create a new empty context */
682 Newz (0, prev->cctx, 1, coro_cctx); 1222 Newz (0, prev->cctx, 1, coro_cctx);
683 prev->cctx->inuse = 1; 1223 prev->flags &= ~CF_NEW;
684 prev->flags |= CF_RUNNING; 1224 prev->flags |= CF_RUNNING;
685 } 1225 }
686
687 if (!prev->flags & CF_RUNNING)
688 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
689
690 if (next->flags & CF_RUNNING)
691 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
692 1226
693 prev->flags &= ~CF_RUNNING; 1227 prev->flags &= ~CF_RUNNING;
694 next->flags |= CF_RUNNING; 1228 next->flags |= CF_RUNNING;
695 1229
696 LOCK; 1230 LOCK;
697 1231
698 if (next->mainstack) 1232 /* first get rid of the old state */
1233 save_perl (aTHX_ prev);
1234
1235 if (expect_false (next->flags & CF_NEW))
699 { 1236 {
700 /* coroutine already started */ 1237 /* need to start coroutine */
701 SAVE (prev, flags); 1238 next->flags &= ~CF_NEW;
702 LOAD (next); 1239 /* setup coroutine call */
1240 coro_setup (aTHX_ next);
703 } 1241 }
704 else 1242 else
705 { 1243 load_perl (aTHX_ next);
706 /* need to start coroutine */
707 /* first get rid of the old state */
708 SAVE (prev, -1);
709 /* setup coroutine call */
710 setup_coro (next);
711 /* need a new stack */
712 assert (!next->stack);
713 }
714 1244
715 prev__cctx = prev->cctx; 1245 prev__cctx = prev->cctx;
716 1246
717 /* possibly "free" the cctx */ 1247 /* possibly "free" the cctx */
1248 if (expect_true (
718 if (prev__cctx->idle_sp == STACKLEVEL) 1249 prev__cctx->idle_sp == STACKLEVEL
1250 && !(prev__cctx->flags & CC_TRACE)
1251 && !force_cctx
1252 ))
719 { 1253 {
720 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */ 1254 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
721 assert (PL_top_env == prev__cctx->top_env); 1255 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1256
1257 prev->cctx = 0;
1258
1259 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1260 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1261 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1262 if (!next->cctx)
1263 next->cctx = cctx_get (aTHX);
722 1264
723 cctx_put (prev__cctx); 1265 cctx_put (prev__cctx);
724 prev->cctx = 0;
725 } 1266 }
726 1267
1268 ++next->usecount;
1269
727 if (!next->cctx) 1270 if (expect_true (!next->cctx))
728 next->cctx = cctx_get (); 1271 next->cctx = cctx_get (aTHX);
729 1272
1273 has_throw = !!next->throw;
1274
730 if (prev__cctx != next->cctx) 1275 if (expect_false (prev__cctx != next->cctx))
731 { 1276 {
732 assert ( prev__cctx->inuse);
733 assert (!next->cctx->inuse);
734
735 prev__cctx->inuse = 0;
736 next->cctx->inuse = 1;
737
738 prev__cctx->top_env = PL_top_env; 1277 prev__cctx->top_env = PL_top_env;
739 PL_top_env = next->cctx->top_env; 1278 PL_top_env = next->cctx->top_env;
740 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx); 1279 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
741 } 1280 }
742 1281
743 free_coro_mortal (); 1282 free_coro_mortal (aTHX);
744
745 UNLOCK; 1283 UNLOCK;
1284
1285 if (expect_false (has_throw))
1286 {
1287 struct coro *coro = SvSTATE (coro_current);
1288
1289 if (coro->throw)
1290 {
1291 SV *exception = coro->throw;
1292 coro->throw = 0;
1293 sv_setsv (ERRSV, exception);
1294 croak (0);
1295 }
1296 }
746 } 1297 }
747} 1298}
748 1299
749struct transfer_args 1300struct transfer_args
750{ 1301{
751 struct coro *prev, *next; 1302 struct coro *prev, *next;
752 int flags;
753}; 1303};
754 1304
1305#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
755#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1306#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
756 1307
1308/** high level stuff ********************************************************/
1309
757static void 1310static int
758coro_state_destroy (struct coro *coro) 1311coro_state_destroy (pTHX_ struct coro *coro)
759{ 1312{
760 if (coro->refcnt--) 1313 if (coro->flags & CF_DESTROYED)
761 return; 1314 return 0;
762 1315
1316 coro->flags |= CF_DESTROYED;
1317
763 if (coro->flags & CF_RUNNING) 1318 if (coro->flags & CF_READY)
764 croak ("FATAL: tried to destroy currently running coroutine"); 1319 {
1320 /* reduce nready, as destroying a ready coro effectively unreadies it */
1321 /* alternative: look through all ready queues and remove the coro */
1322 LOCK;
1323 --coro_nready;
1324 UNLOCK;
1325 }
1326 else
1327 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
765 1328
766 if (coro->mainstack && coro->mainstack != main_mainstack) 1329 if (coro->mainstack && coro->mainstack != main_mainstack)
767 { 1330 {
768 struct coro temp; 1331 struct coro temp;
769 1332
770 SAVE ((&temp), TRANSFER_SAVE_ALL); 1333 if (coro->flags & CF_RUNNING)
771 LOAD (coro); 1334 croak ("FATAL: tried to destroy currently running coroutine");
772 1335
773 coro_destroy_stacks (); 1336 save_perl (aTHX_ &temp);
1337 load_perl (aTHX_ coro);
774 1338
775 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1339 coro_destroy (aTHX_ coro);
776 1340
1341 load_perl (aTHX_ &temp);
1342
777 coro->mainstack = 0; 1343 coro->slot = 0;
778 } 1344 }
779 1345
780 cctx_free (coro->cctx); 1346 cctx_destroy (coro->cctx);
781 SvREFCNT_dec (coro->args); 1347 SvREFCNT_dec (coro->args);
782 Safefree (coro); 1348
1349 if (coro->next) coro->next->prev = coro->prev;
1350 if (coro->prev) coro->prev->next = coro->next;
1351 if (coro == coro_first) coro_first = coro->next;
1352
1353 return 1;
783} 1354}
784 1355
785static int 1356static int
786coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1357coro_state_free (pTHX_ SV *sv, MAGIC *mg)
787{ 1358{
788 struct coro *coro = (struct coro *)mg->mg_ptr; 1359 struct coro *coro = (struct coro *)mg->mg_ptr;
789 mg->mg_ptr = 0; 1360 mg->mg_ptr = 0;
790 1361
1362 coro->hv = 0;
1363
1364 if (--coro->refcnt < 0)
1365 {
791 coro_state_destroy (coro); 1366 coro_state_destroy (aTHX_ coro);
1367 Safefree (coro);
1368 }
792 1369
793 return 0; 1370 return 0;
794} 1371}
795 1372
796static int 1373static int
… …
803 return 0; 1380 return 0;
804} 1381}
805 1382
806static MGVTBL coro_state_vtbl = { 1383static MGVTBL coro_state_vtbl = {
807 0, 0, 0, 0, 1384 0, 0, 0, 0,
808 coro_state_clear, 1385 coro_state_free,
809 0, 1386 0,
810#ifdef MGf_DUP 1387#ifdef MGf_DUP
811 coro_state_dup, 1388 coro_state_dup,
812#else 1389#else
813# define MGf_DUP 0 1390# define MGf_DUP 0
814#endif 1391#endif
815}; 1392};
816 1393
817static struct coro *
818SvSTATE (SV *coro)
819{
820 HV *stash;
821 MAGIC *mg;
822
823 if (SvROK (coro))
824 coro = SvRV (coro);
825
826 stash = SvSTASH (coro);
827 if (stash != coro_stash && stash != coro_state_stash)
828 {
829 /* very slow, but rare, check */
830 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
831 croak ("Coro::State object required");
832 }
833
834 mg = SvMAGIC (coro);
835 assert (mg->mg_type == PERL_MAGIC_ext);
836 return (struct coro *)mg->mg_ptr;
837}
838
839static void 1394static void
840prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1395prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
841{ 1396{
842 ta->prev = SvSTATE (prev); 1397 ta->prev = SvSTATE (prev_sv);
843 ta->next = SvSTATE (next); 1398 ta->next = SvSTATE (next_sv);
844 ta->flags = flags; 1399 TRANSFER_CHECK (*ta);
845} 1400}
846 1401
847static void 1402static void
848api_transfer (SV *prev, SV *next, int flags) 1403api_transfer (SV *prev_sv, SV *next_sv)
849{ 1404{
850 dTHX; 1405 dTHX;
851 struct transfer_args ta; 1406 struct transfer_args ta;
852 1407
853 prepare_transfer (&ta, prev, next, flags); 1408 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
854 TRANSFER (ta); 1409 TRANSFER (ta, 1);
855} 1410}
856 1411
857/** Coro ********************************************************************/ 1412/** Coro ********************************************************************/
858 1413
859#define PRIO_MAX 3
860#define PRIO_HIGH 1
861#define PRIO_NORMAL 0
862#define PRIO_LOW -1
863#define PRIO_IDLE -3
864#define PRIO_MIN -4
865
866/* for Coro.pm */
867static GV *coro_current, *coro_idle;
868static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
869static int coro_nready;
870
871static void 1414static void
872coro_enq (SV *coro_sv) 1415coro_enq (pTHX_ SV *coro_sv)
873{ 1416{
874 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv); 1417 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875 coro_nready++;
876} 1418}
877 1419
878static SV * 1420static SV *
879coro_deq (int min_prio) 1421coro_deq (pTHX)
880{ 1422{
881 int prio = PRIO_MAX - PRIO_MIN; 1423 int prio;
882 1424
883 min_prio -= PRIO_MIN;
884 if (min_prio < 0)
885 min_prio = 0;
886
887 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1425 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
888 if (AvFILLp (coro_ready [prio]) >= 0) 1426 if (AvFILLp (coro_ready [prio]) >= 0)
889 {
890 coro_nready--;
891 return av_shift (coro_ready [prio]); 1427 return av_shift (coro_ready [prio]);
892 }
893 1428
894 return 0; 1429 return 0;
895} 1430}
896 1431
897static int 1432static int
898api_ready (SV *coro_sv) 1433api_ready (SV *coro_sv)
899{ 1434{
1435 dTHX;
900 struct coro *coro; 1436 struct coro *coro;
1437 SV *sv_hook;
1438 void (*xs_hook)(void);
901 1439
902 if (SvROK (coro_sv)) 1440 if (SvROK (coro_sv))
903 coro_sv = SvRV (coro_sv); 1441 coro_sv = SvRV (coro_sv);
904 1442
905 coro = SvSTATE (coro_sv); 1443 coro = SvSTATE (coro_sv);
906 1444
907 if (coro->flags & CF_READY) 1445 if (coro->flags & CF_READY)
908 return 0; 1446 return 0;
909 1447
910 if (coro->flags & CF_RUNNING)
911 croak ("Coro::ready called on currently running coroutine");
912
913 coro->flags |= CF_READY; 1448 coro->flags |= CF_READY;
914 1449
915 LOCK; 1450 LOCK;
1451
1452 sv_hook = coro_nready ? 0 : coro_readyhook;
1453 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1454
916 coro_enq (SvREFCNT_inc (coro_sv)); 1455 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1456 ++coro_nready;
1457
917 UNLOCK; 1458 UNLOCK;
1459
1460 if (sv_hook)
1461 {
1462 dSP;
1463
1464 ENTER;
1465 SAVETMPS;
1466
1467 PUSHMARK (SP);
1468 PUTBACK;
1469 call_sv (sv_hook, G_DISCARD);
1470 SPAGAIN;
1471
1472 FREETMPS;
1473 LEAVE;
1474 }
1475
1476 if (xs_hook)
1477 xs_hook ();
918 1478
919 return 1; 1479 return 1;
920} 1480}
921 1481
922static int 1482static int
923api_is_ready (SV *coro_sv) 1483api_is_ready (SV *coro_sv)
924{ 1484{
1485 dTHX;
925 return !!SvSTATE (coro_sv)->flags & CF_READY; 1486 return !!(SvSTATE (coro_sv)->flags & CF_READY);
926} 1487}
927 1488
928static void 1489static void
929prepare_schedule (struct transfer_args *ta) 1490prepare_schedule (pTHX_ struct transfer_args *ta)
930{ 1491{
931 SV *current, *prev, *next; 1492 SV *prev_sv, *next_sv;
932
933 current = GvSV (coro_current);
934 1493
935 for (;;) 1494 for (;;)
936 { 1495 {
937 LOCK; 1496 LOCK;
938 next = coro_deq (PRIO_MIN); 1497 next_sv = coro_deq (aTHX);
1498
1499 /* nothing to schedule: call the idle handler */
1500 if (expect_false (!next_sv))
1501 {
1502 dSP;
1503 UNLOCK;
1504
1505 ENTER;
1506 SAVETMPS;
1507
1508 PUSHMARK (SP);
1509 PUTBACK;
1510 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1511 SPAGAIN;
1512
1513 FREETMPS;
1514 LEAVE;
1515 continue;
1516 }
1517
1518 ta->next = SvSTATE (next_sv);
1519
1520 /* cannot transfer to destroyed coros, skip and look for next */
1521 if (expect_false (ta->next->flags & CF_DESTROYED))
1522 {
1523 UNLOCK;
1524 SvREFCNT_dec (next_sv);
1525 /* coro_nready is already taken care of by destroy */
1526 continue;
1527 }
1528
1529 --coro_nready;
939 UNLOCK; 1530 UNLOCK;
940
941 if (next)
942 break; 1531 break;
943
944 {
945 dSP;
946
947 ENTER;
948 SAVETMPS;
949
950 PUSHMARK (SP);
951 PUTBACK;
952 call_sv (GvSV (coro_idle), G_DISCARD);
953
954 FREETMPS;
955 LEAVE;
956 } 1532 }
957 }
958
959 prev = SvRV (current);
960 SvRV (current) = next;
961 1533
962 /* free this only after the transfer */ 1534 /* free this only after the transfer */
1535 prev_sv = SvRV (coro_current);
1536 ta->prev = SvSTATE (prev_sv);
1537 TRANSFER_CHECK (*ta);
1538 assert (ta->next->flags & CF_READY);
1539 ta->next->flags &= ~CF_READY;
1540 SvRV_set (coro_current, next_sv);
1541
963 LOCK; 1542 LOCK;
964 free_coro_mortal (); 1543 free_coro_mortal (aTHX);
1544 coro_mortal = prev_sv;
965 UNLOCK; 1545 UNLOCK;
966 coro_mortal = prev;
967
968 ta->prev = SvSTATE (prev);
969 ta->next = SvSTATE (next);
970 ta->flags = TRANSFER_SAVE_ALL;
971
972 ta->next->flags &= ~CF_READY;
973} 1546}
974 1547
975static void 1548static void
976prepare_cede (struct transfer_args *ta) 1549prepare_cede (pTHX_ struct transfer_args *ta)
977{ 1550{
978 api_ready (GvSV (coro_current)); 1551 api_ready (coro_current);
979
980 prepare_schedule (ta); 1552 prepare_schedule (aTHX_ ta);
1553}
1554
1555static int
1556prepare_cede_notself (pTHX_ struct transfer_args *ta)
1557{
1558 if (coro_nready)
1559 {
1560 SV *prev = SvRV (coro_current);
1561 prepare_schedule (aTHX_ ta);
1562 api_ready (prev);
1563 return 1;
1564 }
1565 else
1566 return 0;
981} 1567}
982 1568
983static void 1569static void
984api_schedule (void) 1570api_schedule (void)
985{ 1571{
986 dTHX; 1572 dTHX;
987 struct transfer_args ta; 1573 struct transfer_args ta;
988 1574
989 prepare_schedule (&ta); 1575 prepare_schedule (aTHX_ &ta);
990 TRANSFER (ta); 1576 TRANSFER (ta, 1);
991} 1577}
992 1578
993static void 1579static int
994api_cede (void) 1580api_cede (void)
995{ 1581{
996 dTHX; 1582 dTHX;
997 struct transfer_args ta; 1583 struct transfer_args ta;
998 1584
999 prepare_cede (&ta); 1585 prepare_cede (aTHX_ &ta);
1586
1587 if (expect_true (ta.prev != ta.next))
1588 {
1000 TRANSFER (ta); 1589 TRANSFER (ta, 1);
1590 return 1;
1591 }
1592 else
1593 return 0;
1001} 1594}
1002 1595
1596static int
1597api_cede_notself (void)
1598{
1599 dTHX;
1600 struct transfer_args ta;
1601
1602 if (prepare_cede_notself (aTHX_ &ta))
1603 {
1604 TRANSFER (ta, 1);
1605 return 1;
1606 }
1607 else
1608 return 0;
1609}
1610
1611static void
1612api_trace (SV *coro_sv, int flags)
1613{
1614 dTHX;
1615 struct coro *coro = SvSTATE (coro_sv);
1616
1617 if (flags & CC_TRACE)
1618 {
1619 if (!coro->cctx)
1620 coro->cctx = cctx_new ();
1621 else if (!(coro->cctx->flags & CC_TRACE))
1622 croak ("cannot enable tracing on coroutine with custom stack");
1623
1624 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1625 }
1626 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1627 {
1628 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1629
1630 if (coro->flags & CF_RUNNING)
1631 PL_runops = RUNOPS_DEFAULT;
1632 else
1633 coro->slot->runops = RUNOPS_DEFAULT;
1634 }
1635}
1636
1637static int
1638coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1639{
1640 AV *padlist;
1641 AV *av = (AV *)mg->mg_obj;
1642
1643 abort ();
1644
1645 return 0;
1646}
1647
1648static MGVTBL coro_gensub_vtbl = {
1649 0, 0, 0, 0,
1650 coro_gensub_free
1651};
1652
1653/*****************************************************************************/
1654/* PerlIO::cede */
1655
1656typedef struct
1657{
1658 PerlIOBuf base;
1659 NV next, every;
1660} PerlIOCede;
1661
1662static IV
1663PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1664{
1665 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1666
1667 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1668 self->next = nvtime () + self->every;
1669
1670 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1671}
1672
1673static SV *
1674PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1675{
1676 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1677
1678 return newSVnv (self->every);
1679}
1680
1681static IV
1682PerlIOCede_flush (pTHX_ PerlIO *f)
1683{
1684 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1685 double now = nvtime ();
1686
1687 if (now >= self->next)
1688 {
1689 api_cede ();
1690 self->next = now + self->every;
1691 }
1692
1693 return PerlIOBuf_flush (aTHX_ f);
1694}
1695
1696static PerlIO_funcs PerlIO_cede =
1697{
1698 sizeof(PerlIO_funcs),
1699 "cede",
1700 sizeof(PerlIOCede),
1701 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1702 PerlIOCede_pushed,
1703 PerlIOBuf_popped,
1704 PerlIOBuf_open,
1705 PerlIOBase_binmode,
1706 PerlIOCede_getarg,
1707 PerlIOBase_fileno,
1708 PerlIOBuf_dup,
1709 PerlIOBuf_read,
1710 PerlIOBuf_unread,
1711 PerlIOBuf_write,
1712 PerlIOBuf_seek,
1713 PerlIOBuf_tell,
1714 PerlIOBuf_close,
1715 PerlIOCede_flush,
1716 PerlIOBuf_fill,
1717 PerlIOBase_eof,
1718 PerlIOBase_error,
1719 PerlIOBase_clearerr,
1720 PerlIOBase_setlinebuf,
1721 PerlIOBuf_get_base,
1722 PerlIOBuf_bufsiz,
1723 PerlIOBuf_get_ptr,
1724 PerlIOBuf_get_cnt,
1725 PerlIOBuf_set_ptrcnt,
1726};
1727
1728
1003MODULE = Coro::State PACKAGE = Coro::State 1729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1004 1730
1005PROTOTYPES: DISABLE 1731PROTOTYPES: DISABLE
1006 1732
1007BOOT: 1733BOOT:
1008{ 1734{
1009#ifdef USE_ITHREADS 1735#ifdef USE_ITHREADS
1010 MUTEX_INIT (&coro_mutex); 1736 MUTEX_INIT (&coro_mutex);
1011#endif 1737#endif
1012 BOOT_PAGESIZE; 1738 BOOT_PAGESIZE;
1013 1739
1740 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1741 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1742
1743 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1744 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1745 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1746
1747 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1748 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1749 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1750
1014 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1751 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1015 1752
1016 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1753 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1017 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1754 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1018 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1755 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1756 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1019 1757
1020 main_mainstack = PL_mainstack; 1758 main_mainstack = PL_mainstack;
1759 main_top_env = PL_top_env;
1021 1760
1761 while (main_top_env->je_prev)
1762 main_top_env = main_top_env->je_prev;
1763
1022 coroapi.ver = CORO_API_VERSION; 1764 coroapi.ver = CORO_API_VERSION;
1765 coroapi.rev = CORO_API_REVISION;
1023 coroapi.transfer = api_transfer; 1766 coroapi.transfer = api_transfer;
1767
1768 {
1769 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1770
1771 if (!svp) croak ("Time::HiRes is required");
1772 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1773
1774 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1775 }
1024 1776
1025 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1777 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1026} 1778}
1027 1779
1028SV * 1780SV *
1029new (char *klass, ...) 1781new (char *klass, ...)
1030 CODE: 1782 CODE:
1031{ 1783{
1032 struct coro *coro; 1784 struct coro *coro;
1785 MAGIC *mg;
1033 HV *hv; 1786 HV *hv;
1034 int i; 1787 int i;
1035 1788
1036 Newz (0, coro, 1, struct coro); 1789 Newz (0, coro, 1, struct coro);
1037 coro->args = newAV (); 1790 coro->args = newAV ();
1791 coro->flags = CF_NEW;
1038 1792
1793 if (coro_first) coro_first->prev = coro;
1794 coro->next = coro_first;
1795 coro_first = coro;
1796
1039 hv = newHV (); 1797 coro->hv = hv = newHV ();
1040 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1798 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1799 mg->mg_flags |= MGf_DUP;
1041 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1800 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1042 1801
1802 av_extend (coro->args, items - 1);
1043 for (i = 1; i < items; i++) 1803 for (i = 1; i < items; i++)
1044 av_push (coro->args, newSVsv (ST (i))); 1804 av_push (coro->args, newSVsv (ST (i)));
1045} 1805}
1046 OUTPUT: 1806 OUTPUT:
1047 RETVAL 1807 RETVAL
1048 1808
1809# these not obviously related functions are all rolled into the same xs
1810# function to increase chances that they all will call transfer with the same
1811# stack offset
1049void 1812void
1050_set_stacklevel (...) 1813_set_stacklevel (...)
1051 ALIAS: 1814 ALIAS:
1052 Coro::State::transfer = 1 1815 Coro::State::transfer = 1
1053 Coro::schedule = 2 1816 Coro::schedule = 2
1054 Coro::cede = 3 1817 Coro::cede = 3
1055 Coro::Cont::yield = 4 1818 Coro::cede_notself = 4
1056 CODE: 1819 CODE:
1057{ 1820{
1058 struct transfer_args ta; 1821 struct transfer_args ta;
1059 1822
1823 PUTBACK;
1060 switch (ix) 1824 switch (ix)
1061 { 1825 {
1062 case 0: 1826 case 0:
1063 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 1827 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1064 ta.next = 0; 1828 ta.next = 0;
1065 ta.flags = TRANSFER_SET_STACKLEVEL;
1066 break; 1829 break;
1067 1830
1068 case 1: 1831 case 1:
1069 if (items != 3) 1832 if (items != 2)
1070 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1833 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1071 1834
1072 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1835 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1073 break; 1836 break;
1074 1837
1075 case 2: 1838 case 2:
1076 prepare_schedule (&ta); 1839 prepare_schedule (aTHX_ &ta);
1077 break; 1840 break;
1078 1841
1079 case 3: 1842 case 3:
1080 prepare_cede (&ta); 1843 prepare_cede (aTHX_ &ta);
1081 break; 1844 break;
1082 1845
1083 case 4: 1846 case 4:
1084 { 1847 if (!prepare_cede_notself (aTHX_ &ta))
1085 SV *yieldstack; 1848 XSRETURN_EMPTY;
1086 SV *sv;
1087 AV *defav = GvAV (PL_defgv);
1088 1849
1089 yieldstack = *hv_fetch (
1090 (HV *)SvRV (GvSV (coro_current)),
1091 "yieldstack", sizeof ("yieldstack") - 1,
1092 0
1093 );
1094
1095 /* set up @_ -- ugly */
1096 av_clear (defav);
1097 av_fill (defav, items - 1);
1098 while (items--)
1099 av_store (defav, items, SvREFCNT_inc (ST(items)));
1100
1101 sv = av_pop ((AV *)SvRV (yieldstack));
1102 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1103 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1104 ta.flags = 0;
1105 SvREFCNT_dec (sv);
1106 }
1107 break; 1850 break;
1108
1109 } 1851 }
1852 SPAGAIN;
1110 1853
1854 BARRIER;
1855 PUTBACK;
1111 TRANSFER (ta); 1856 TRANSFER (ta, 0);
1857 SPAGAIN; /* might be the sp of a different coroutine now */
1858 /* be extra careful not to ever do anything after TRANSFER */
1112} 1859}
1860
1861bool
1862_destroy (SV *coro_sv)
1863 CODE:
1864 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1865 OUTPUT:
1866 RETVAL
1113 1867
1114void 1868void
1115_clone_state_from (SV *dst, SV *src)
1116 CODE:
1117{
1118 struct coro *coro_src = SvSTATE (src);
1119
1120 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1121
1122 ++coro_src->refcnt;
1123 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1124}
1125
1126void
1127_exit (code) 1869_exit (int code)
1128 int code
1129 PROTOTYPE: $ 1870 PROTOTYPE: $
1130 CODE: 1871 CODE:
1131 _exit (code); 1872 _exit (code);
1873
1874int
1875cctx_stacksize (int new_stacksize = 0)
1876 CODE:
1877 RETVAL = coro_stacksize;
1878 if (new_stacksize)
1879 coro_stacksize = new_stacksize;
1880 OUTPUT:
1881 RETVAL
1132 1882
1133int 1883int
1134cctx_count () 1884cctx_count ()
1135 CODE: 1885 CODE:
1136 RETVAL = cctx_count; 1886 RETVAL = cctx_count;
… …
1142 CODE: 1892 CODE:
1143 RETVAL = cctx_idle; 1893 RETVAL = cctx_idle;
1144 OUTPUT: 1894 OUTPUT:
1145 RETVAL 1895 RETVAL
1146 1896
1897void
1898list ()
1899 PPCODE:
1900{
1901 struct coro *coro;
1902 for (coro = coro_first; coro; coro = coro->next)
1903 if (coro->hv)
1904 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1905}
1906
1907void
1908call (Coro::State coro, SV *coderef)
1909 ALIAS:
1910 eval = 1
1911 CODE:
1912{
1913 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1914 {
1915 struct coro temp;
1916
1917 if (!(coro->flags & CF_RUNNING))
1918 {
1919 PUTBACK;
1920 save_perl (aTHX_ &temp);
1921 load_perl (aTHX_ coro);
1922 }
1923
1924 {
1925 dSP;
1926 ENTER;
1927 SAVETMPS;
1928 PUTBACK;
1929 PUSHSTACK;
1930 PUSHMARK (SP);
1931
1932 if (ix)
1933 eval_sv (coderef, 0);
1934 else
1935 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1936
1937 POPSTACK;
1938 SPAGAIN;
1939 FREETMPS;
1940 LEAVE;
1941 PUTBACK;
1942 }
1943
1944 if (!(coro->flags & CF_RUNNING))
1945 {
1946 save_perl (aTHX_ coro);
1947 load_perl (aTHX_ &temp);
1948 SPAGAIN;
1949 }
1950 }
1951}
1952
1953SV *
1954is_ready (Coro::State coro)
1955 PROTOTYPE: $
1956 ALIAS:
1957 is_ready = CF_READY
1958 is_running = CF_RUNNING
1959 is_new = CF_NEW
1960 is_destroyed = CF_DESTROYED
1961 CODE:
1962 RETVAL = boolSV (coro->flags & ix);
1963 OUTPUT:
1964 RETVAL
1965
1966void
1967api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1968
1969SV *
1970has_cctx (Coro::State coro)
1971 PROTOTYPE: $
1972 CODE:
1973 RETVAL = boolSV (!!coro->cctx);
1974 OUTPUT:
1975 RETVAL
1976
1977int
1978is_traced (Coro::State coro)
1979 PROTOTYPE: $
1980 CODE:
1981 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1982 OUTPUT:
1983 RETVAL
1984
1985IV
1986rss (Coro::State coro)
1987 PROTOTYPE: $
1988 ALIAS:
1989 usecount = 1
1990 CODE:
1991 switch (ix)
1992 {
1993 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1994 case 1: RETVAL = coro->usecount; break;
1995 }
1996 OUTPUT:
1997 RETVAL
1998
1999void
2000force_cctx ()
2001 CODE:
2002 struct coro *coro = SvSTATE (coro_current);
2003 coro->cctx->idle_sp = 0;
2004
2005void
2006throw (Coro::State self, SV *throw = &PL_sv_undef)
2007 PROTOTYPE: $;$
2008 CODE:
2009 SvREFCNT_dec (self->throw);
2010 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2011
2012void
2013swap_defsv (Coro::State self)
2014 PROTOTYPE: $
2015 ALIAS:
2016 swap_defav = 1
2017 CODE:
2018 if (!self->slot)
2019 croak ("cannot swap state with coroutine that has no saved state");
2020 else
2021 {
2022 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2023 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2024
2025 SV *tmp = *src; *src = *dst; *dst = tmp;
2026 }
2027
1147MODULE = Coro::State PACKAGE = Coro 2028MODULE = Coro::State PACKAGE = Coro
1148 2029
1149BOOT: 2030BOOT:
1150{ 2031{
1151 int i; 2032 int i;
1152 2033
2034 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2035 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2036 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2037
2038 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2039 SvREADONLY_on (coro_current);
2040
1153 coro_stash = gv_stashpv ("Coro", TRUE); 2041 coro_stash = gv_stashpv ("Coro", TRUE);
1154 2042
1155 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2043 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1156 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2044 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1157 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2045 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1158 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2046 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1159 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2047 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1160 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2048 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1161 2049
1162 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1163 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1164
1165 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2050 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1166 coro_ready[i] = newAV (); 2051 coro_ready[i] = newAV ();
1167 2052
1168 { 2053 {
1169 SV *sv = perl_get_sv("Coro::API", 1); 2054 SV *sv = perl_get_sv ("Coro::API", TRUE);
2055 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1170 2056
1171 coroapi.schedule = api_schedule; 2057 coroapi.schedule = api_schedule;
1172 coroapi.cede = api_cede; 2058 coroapi.cede = api_cede;
2059 coroapi.cede_notself = api_cede_notself;
1173 coroapi.ready = api_ready; 2060 coroapi.ready = api_ready;
1174 coroapi.is_ready = api_is_ready; 2061 coroapi.is_ready = api_is_ready;
1175 coroapi.nready = &coro_nready; 2062 coroapi.nready = &coro_nready;
1176 coroapi.current = coro_current; 2063 coroapi.current = coro_current;
1177 2064
1178 GCoroAPI = &coroapi; 2065 GCoroAPI = &coroapi;
1179 sv_setiv (sv, (IV)&coroapi); 2066 sv_setiv (sv, (IV)&coroapi);
1180 SvREADONLY_on (sv); 2067 SvREADONLY_on (sv);
1181 } 2068 }
1182} 2069}
2070
2071void
2072_set_current (SV *current)
2073 PROTOTYPE: $
2074 CODE:
2075 SvREFCNT_dec (SvRV (coro_current));
2076 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
2077
2078void
2079_set_readyhook (SV *hook)
2080 PROTOTYPE: $
2081 CODE:
2082 LOCK;
2083 SvREFCNT_dec (coro_readyhook);
2084 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2085 UNLOCK;
1183 2086
1184int 2087int
1185prio (Coro::State coro, int newprio = 0) 2088prio (Coro::State coro, int newprio = 0)
1186 ALIAS: 2089 ALIAS:
1187 nice = 1 2090 nice = 1
… …
1190 RETVAL = coro->prio; 2093 RETVAL = coro->prio;
1191 2094
1192 if (items > 1) 2095 if (items > 1)
1193 { 2096 {
1194 if (ix) 2097 if (ix)
1195 newprio += coro->prio; 2098 newprio = coro->prio - newprio;
1196 2099
1197 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2100 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1198 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2101 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1199 2102
1200 coro->prio = newprio; 2103 coro->prio = newprio;
1201 } 2104 }
1202} 2105}
2106 OUTPUT:
2107 RETVAL
1203 2108
1204SV * 2109SV *
1205ready (SV *self) 2110ready (SV *self)
1206 PROTOTYPE: $ 2111 PROTOTYPE: $
1207 CODE: 2112 CODE:
1208 RETVAL = boolSV (api_ready (self)); 2113 RETVAL = boolSV (api_ready (self));
1209 OUTPUT: 2114 OUTPUT:
1210 RETVAL 2115 RETVAL
1211 2116
1212SV *
1213is_ready (SV *self)
1214 PROTOTYPE: $
1215 CODE:
1216 RETVAL = boolSV (api_is_ready (self));
1217 OUTPUT:
1218 RETVAL
1219
1220int 2117int
1221nready (...) 2118nready (...)
1222 PROTOTYPE: 2119 PROTOTYPE:
1223 CODE: 2120 CODE:
1224 RETVAL = coro_nready; 2121 RETVAL = coro_nready;
1225 OUTPUT: 2122 OUTPUT:
1226 RETVAL 2123 RETVAL
1227 2124
2125# for async_pool speedup
2126void
2127_pool_1 (SV *cb)
2128 CODE:
2129{
2130 struct coro *coro = SvSTATE (coro_current);
2131 HV *hv = (HV *)SvRV (coro_current);
2132 AV *defav = GvAV (PL_defgv);
2133 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2134 AV *invoke_av;
2135 int i, len;
2136
2137 if (!invoke)
2138 {
2139 SV *old = PL_diehook;
2140 PL_diehook = 0;
2141 SvREFCNT_dec (old);
2142 croak ("\3async_pool terminate\2\n");
2143 }
2144
2145 SvREFCNT_dec (coro->saved_deffh);
2146 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2147
2148 hv_store (hv, "desc", sizeof ("desc") - 1,
2149 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2150
2151 invoke_av = (AV *)SvRV (invoke);
2152 len = av_len (invoke_av);
2153
2154 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2155
2156 if (len > 0)
2157 {
2158 av_fill (defav, len - 1);
2159 for (i = 0; i < len; ++i)
2160 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2161 }
2162
2163 SvREFCNT_dec (invoke);
2164}
2165
2166void
2167_pool_2 (SV *cb)
2168 CODE:
2169{
2170 struct coro *coro = SvSTATE (coro_current);
2171
2172 sv_setsv (cb, &PL_sv_undef);
2173
2174 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2175 coro->saved_deffh = 0;
2176
2177 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2178 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2179 {
2180 SV *old = PL_diehook;
2181 PL_diehook = 0;
2182 SvREFCNT_dec (old);
2183 croak ("\3async_pool terminate\2\n");
2184 }
2185
2186 av_clear (GvAV (PL_defgv));
2187 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2188 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2189
2190 coro->prio = 0;
2191
2192 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2193 api_trace (coro_current, 0);
2194
2195 av_push (av_async_pool, newSVsv (coro_current));
2196}
2197
2198#if 0
2199
2200void
2201_generator_call (...)
2202 PROTOTYPE: @
2203 PPCODE:
2204 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2205 xxxx
2206 abort ();
2207
2208SV *
2209gensub (SV *sub, ...)
2210 PROTOTYPE: &;@
2211 CODE:
2212{
2213 struct coro *coro;
2214 MAGIC *mg;
2215 CV *xcv;
2216 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2217 int i;
2218
2219 CvGV (ncv) = CvGV (cv);
2220 CvFILE (ncv) = CvFILE (cv);
2221
2222 Newz (0, coro, 1, struct coro);
2223 coro->args = newAV ();
2224 coro->flags = CF_NEW;
2225
2226 av_extend (coro->args, items - 1);
2227 for (i = 1; i < items; i++)
2228 av_push (coro->args, newSVsv (ST (i)));
2229
2230 CvISXSUB_on (ncv);
2231 CvXSUBANY (ncv).any_ptr = (void *)coro;
2232
2233 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2234
2235 CvXSUB (ncv) = CvXSUB (xcv);
2236 CvANON_on (ncv);
2237
2238 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2239 RETVAL = newRV_noinc ((SV *)ncv);
2240}
2241 OUTPUT:
2242 RETVAL
2243
2244#endif
2245
2246
1228MODULE = Coro::State PACKAGE = Coro::AIO 2247MODULE = Coro::State PACKAGE = Coro::AIO
1229 2248
1230SV * 2249SV *
1231_get_state () 2250_get_state ()
1232 CODE: 2251 CODE:
1233{ 2252{
1234 struct { 2253 struct io_state *data;
1235 int errorno;
1236 int laststype;
1237 int laststatval;
1238 Stat_t statcache;
1239 } data;
1240 2254
2255 RETVAL = newSV (sizeof (struct io_state));
2256 data = (struct io_state *)SvPVX (RETVAL);
2257 SvCUR_set (RETVAL, sizeof (struct io_state));
2258 SvPOK_only (RETVAL);
2259
1241 data.errorno = errno; 2260 data->errorno = errno;
1242 data.laststype = PL_laststype; 2261 data->laststype = PL_laststype;
1243 data.laststatval = PL_laststatval; 2262 data->laststatval = PL_laststatval;
1244 data.statcache = PL_statcache; 2263 data->statcache = PL_statcache;
1245
1246 RETVAL = newSVpvn ((char *)&data, sizeof data);
1247} 2264}
1248 OUTPUT: 2265 OUTPUT:
1249 RETVAL 2266 RETVAL
1250 2267
1251void 2268void
1252_set_state (char *data_) 2269_set_state (char *data_)
1253 PROTOTYPE: $ 2270 PROTOTYPE: $
1254 CODE: 2271 CODE:
1255{ 2272{
1256 struct { 2273 struct io_state *data = (void *)data_;
1257 int errorno;
1258 int laststype;
1259 int laststatval;
1260 Stat_t statcache;
1261 } *data = (void *)data_;
1262 2274
1263 errno = data->errorno; 2275 errno = data->errorno;
1264 PL_laststype = data->laststype; 2276 PL_laststype = data->laststype;
1265 PL_laststatval = data->laststatval; 2277 PL_laststatval = data->laststatval;
1266 PL_statcache = data->statcache; 2278 PL_statcache = data->statcache;
1267} 2279}
2280
2281
2282MODULE = Coro::State PACKAGE = Coro::AnyEvent
2283
2284BOOT:
2285 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2286
2287SV *
2288_schedule (...)
2289 PROTOTYPE: @
2290 CODE:
2291{
2292 static int incede;
2293
2294 api_cede_notself ();
2295
2296 ++incede;
2297 while (coro_nready >= incede && api_cede ())
2298 ;
2299
2300 sv_setsv (sv_activity, &PL_sv_undef);
2301 if (coro_nready >= incede)
2302 {
2303 PUSHMARK (SP);
2304 PUTBACK;
2305 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2306 SPAGAIN;
2307 }
2308
2309 --incede;
2310}
2311
2312
2313MODULE = Coro::State PACKAGE = PerlIO::cede
2314
2315BOOT:
2316 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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