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Comparing Coro/Coro/State.xs (file contents):
Revision 1.86 by root, Fri Nov 24 11:36:57 2006 UTC vs.
Revision 1.266 by root, Fri Nov 14 03:26:22 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 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
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
33 105
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 107# undef CORO_STACKGUARD
36#endif 108#endif
37 109
38#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 111# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#define dSTACKLEVEL volatile char stacklevel
122#define STACKLEVEL ((void *)&stacklevel)
123
124#define IN_DESTRUCT (PL_main_cv == Nullcv)
125
126#if __GNUC__ >= 3
127# define attribute(x) __attribute__(x)
128# define expect(expr,value) __builtin_expect ((expr),(value))
129# define INLINE static inline
130#else
131# define attribute(x)
132# define expect(expr,value) (expr)
133# define INLINE static
134#endif
135
136#define expect_false(expr) expect ((expr) != 0, 0)
137#define expect_true(expr) expect ((expr) != 0, 1)
138
139#define NOINLINE attribute ((noinline))
140
141#include "CoroAPI.h"
142
143#ifdef USE_ITHREADS
144
145static perl_mutex coro_lock;
146# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148# if CORO_PTHREAD
149static void *coro_thx;
51# endif 150# endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif
60#endif
61 151
62#define SUB_INIT "Coro::State::initialize"
63#define UCORO_STATE "_coro_state"
64
65/* The next macro should declare a variable stacklevel that contains and approximation
66 * to the current C stack pointer. Its property is that it changes with each call
67 * and should be unique. */
68#define dSTACKLEVEL void *stacklevel = &stacklevel
69
70#define IN_DESTRUCT (PL_main_cv == Nullcv)
71
72#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74#include "CoroAPI.h"
75
76#ifdef USE_ITHREADS
77static perl_mutex coro_mutex;
78# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80#else 152#else
153
81# define LOCK (void)0 154# define LOCK (void)0
82# define UNLOCK (void)0 155# define UNLOCK (void)0
83#endif
84 156
157#endif
158
159# undef LOCK
160# define LOCK (void)0
161# undef UNLOCK
162# define UNLOCK (void)0
163
164/* helper storage struct for Coro::AIO */
165struct io_state
166{
167 AV *res;
168 int errorno;
169 I32 laststype; /* U16 in 5.10.0 */
170 int laststatval;
171 Stat_t statcache;
172};
173
174static double (*nvtime)(); /* so why doesn't it take void? */
175
176static U32 cctx_gen;
177static size_t cctx_stacksize = CORO_STACKSIZE;
85static struct CoroAPI coroapi; 178static struct CoroAPI coroapi;
86static AV *main_mainstack; /* used to differentiate between $main and others */ 179static AV *main_mainstack; /* used to differentiate between $main and others */
180static JMPENV *main_top_env;
87static HV *coro_state_stash; 181static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 182static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183static volatile struct coro *transfer_next;
91 184
92/* this is actually not only the c stack but also c registers etc... */ 185struct transfer_args
186{
187 struct coro *prev, *next;
188};
189
190static GV *irsgv; /* $/ */
191static GV *stdoutgv; /* *STDOUT */
192static SV *rv_diehook;
193static SV *rv_warnhook;
194static HV *hv_sig; /* %SIG */
195
196/* async_pool helper stuff */
197static SV *sv_pool_rss;
198static SV *sv_pool_size;
199static AV *av_async_pool;
200
201/* Coro::AnyEvent */
202static SV *sv_activity;
203
204static struct coro_cctx *cctx_first;
205static int cctx_count, cctx_idle;
206
207enum {
208 CC_MAPPED = 0x01,
209 CC_NOREUSE = 0x02, /* throw this away after tracing */
210 CC_TRACE = 0x04,
211 CC_TRACE_SUB = 0x08, /* trace sub calls */
212 CC_TRACE_LINE = 0x10, /* trace each statement */
213 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214};
215
216/* this is a structure representing a c-level coroutine */
217typedef struct coro_cctx {
218 struct coro_cctx *next;
219
220 /* the stack */
221 void *sptr;
222 size_t ssize;
223
224 /* cpu state */
225 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
226 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
227 JMPENV *top_env;
228 coro_context cctx;
229
230 U32 gen;
231#if CORO_USE_VALGRIND
232 int valgrind_id;
233#endif
234 unsigned char flags;
235} coro_cctx;
236
237enum {
238 CF_RUNNING = 0x0001, /* coroutine is running */
239 CF_READY = 0x0002, /* coroutine is ready */
240 CF_NEW = 0x0004, /* has never been switched to */
241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
242};
243
244/* the structure where most of the perl state is stored, overlaid on the cxstack */
93typedef struct { 245typedef struct {
94 int refcnt; /* pointer reference counter */ 246 SV *defsv;
95 int usecnt; /* shared by how many coroutines */ 247 AV *defav;
96 int gencnt; /* generation counter */ 248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
97 254
98 coro_context cctx; 255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
99 256
100 void *sptr; 257/* this is a structure representing a perl-level coroutine */
101 long ssize; /* positive == mmap, otherwise malloc */
102} coro_stack;
103
104struct coro { 258struct coro {
105 /* the optional C context */ 259 /* the c coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 260 coro_cctx *cctx;
107 void *cursp;
108 int gencnt;
109 261
110 /* optionally saved, might be zero */ 262 /* process data */
111 AV *defav;
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118
119 /* the stacks and related info (callchain etc..) */
120 PERL_SI *curstackinfo;
121 AV *curstack;
122 AV *mainstack; 263 AV *mainstack;
123 SV **stack_sp; 264 perl_slots *slot; /* basically the saved sp */
124 OP *op;
125 SV **curpad;
126 AV *comppad;
127 CV *compcv;
128 SV **stack_base;
129 SV **stack_max;
130 SV **tmps_stack;
131 I32 tmps_floor;
132 I32 tmps_ix;
133 I32 tmps_max;
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 JMPENV *top_env;
149 265
150 /* data associated with this coroutine (initial args) */ 266 AV *args; /* data associated with this coroutine (initial args) */
151 AV *args; 267 int refcnt; /* coroutines are refcounted, yes */
268 int flags; /* CF_ flags */
269 HV *hv; /* the perl hash associated with this coro, if any */
270
271 /* statistics */
272 int usecount; /* number of transfers to this coro */
273
274 /* coro process data */
275 int prio;
276 SV *throw; /* exception to be thrown */
277
278 /* async_pool */
279 SV *saved_deffh;
280
281 /* linked list */
282 struct coro *next, *prev;
152}; 283};
153 284
154typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
155typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
156 287
288/** Coro ********************************************************************/
289
290#define PRIO_MAX 3
291#define PRIO_HIGH 1
292#define PRIO_NORMAL 0
293#define PRIO_LOW -1
294#define PRIO_IDLE -3
295#define PRIO_MIN -4
296
297/* for Coro.pm */
298static SV *coro_current;
299static SV *coro_readyhook;
300static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
301static int coro_nready;
302static struct coro *coro_first;
303
304/** lowlevel stuff **********************************************************/
305
306static SV *
307coro_get_sv (pTHX_ const char *name, int create)
308{
309#if PERL_VERSION_ATLEAST (5,10,0)
310 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
311 get_sv (name, create);
312#endif
313 return get_sv (name, create);
314}
315
316static AV *
317coro_get_av (pTHX_ const char *name, int create)
318{
319#if PERL_VERSION_ATLEAST (5,10,0)
320 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
321 get_av (name, create);
322#endif
323 return get_av (name, create);
324}
325
326static HV *
327coro_get_hv (pTHX_ const char *name, int create)
328{
329#if PERL_VERSION_ATLEAST (5,10,0)
330 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
331 get_hv (name, create);
332#endif
333 return get_hv (name, create);
334}
335
157static AV * 336static AV *
158coro_clone_padlist (pTHX_ CV *cv) 337coro_clone_padlist (pTHX_ CV *cv)
159{ 338{
160 AV *padlist = CvPADLIST (cv); 339 AV *padlist = CvPADLIST (cv);
161 AV *newpadlist, *newpad; 340 AV *newpadlist, *newpad;
162 341
163 newpadlist = newAV (); 342 newpadlist = newAV ();
164 AvREAL_off (newpadlist); 343 AvREAL_off (newpadlist);
165#if PERL_VERSION < 9 344#if PERL_VERSION_ATLEAST (5,10,0)
345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
346#else
166 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167#else
168 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169#endif 348#endif
170 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 349 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171 --AvFILLp (padlist); 350 --AvFILLp (padlist);
172 351
173 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 352 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
174 av_store (newpadlist, 1, (SV *)newpad); 353 av_store (newpadlist, 1, (SV *)newpad);
175 354
176 return newpadlist; 355 return newpadlist;
177} 356}
178 357
… …
208 387
209 /* casting is fun. */ 388 /* casting is fun. */
210 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 389 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211 free_padlist (aTHX_ padlist); 390 free_padlist (aTHX_ padlist);
212 391
213 SvREFCNT_dec (av); 392 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
214 393
215 return 0; 394 return 0;
216} 395}
217 396
218#define PERL_MAGIC_coro PERL_MAGIC_ext 397#define CORO_MAGIC_type_cv PERL_MAGIC_ext
398#define CORO_MAGIC_type_state PERL_MAGIC_ext
219 399
220static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 400static MGVTBL coro_cv_vtbl = {
401 0, 0, 0, 0,
402 coro_cv_free
403};
404
405#define CORO_MAGIC(sv, type) \
406 SvMAGIC (sv) \
407 ? SvMAGIC (sv)->mg_type == type \
408 ? SvMAGIC (sv) \
409 : mg_find (sv, type) \
410 : 0
411
412#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
413#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
414
415INLINE struct coro *
416SvSTATE_ (pTHX_ SV *coro)
417{
418 HV *stash;
419 MAGIC *mg;
420
421 if (SvROK (coro))
422 coro = SvRV (coro);
423
424 if (expect_false (SvTYPE (coro) != SVt_PVHV))
425 croak ("Coro::State object required");
426
427 stash = SvSTASH (coro);
428 if (expect_false (stash != coro_stash && stash != coro_state_stash))
429 {
430 /* very slow, but rare, check */
431 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
432 croak ("Coro::State object required");
433 }
434
435 mg = CORO_MAGIC_state (coro);
436 return (struct coro *)mg->mg_ptr;
437}
438
439#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
221 440
222/* the next two functions merely cache the padlists */ 441/* the next two functions merely cache the padlists */
223static void 442static void
224get_padlist (pTHX_ CV *cv) 443get_padlist (pTHX_ CV *cv)
225{ 444{
226 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 445 MAGIC *mg = CORO_MAGIC_cv (cv);
446 AV *av;
227 447
228 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 448 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
229 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 449 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230 else 450 else
231 { 451 {
232#if 0 452#if CORO_PREFER_PERL_FUNCTIONS
233 /* this should work - but it doesn't :( */ 453 /* this is probably cleaner? but also slower! */
454 /* in practise, it seems to be less stable */
234 CV *cp = Perl_cv_clone (aTHX_ cv); 455 CV *cp = Perl_cv_clone (cv);
235 CvPADLIST (cv) = CvPADLIST (cp); 456 CvPADLIST (cv) = CvPADLIST (cp);
236 CvPADLIST (cp) = 0; 457 CvPADLIST (cp) = 0;
237 SvREFCNT_dec (cp); 458 SvREFCNT_dec (cp);
238#else 459#else
239 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 460 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
242} 463}
243 464
244static void 465static void
245put_padlist (pTHX_ CV *cv) 466put_padlist (pTHX_ CV *cv)
246{ 467{
247 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 468 MAGIC *mg = CORO_MAGIC_cv (cv);
469 AV *av;
248 470
249 if (!mg) 471 if (expect_false (!mg))
250 { 472 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
251 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253 mg->mg_virtual = &vtbl_coro;
254 mg->mg_obj = (SV *)newAV ();
255 }
256 473
257 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 474 av = (AV *)mg->mg_obj;
258}
259 475
260#define SB do { 476 if (expect_false (AvFILLp (av) >= AvMAX (av)))
261#define SE } while (0) 477 av_extend (av, AvMAX (av) + 1);
262 478
263#define LOAD(state) load_state(aTHX_ (state)); 479 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
264#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 480}
265 481
266#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 482/** load & save, init *******************************************************/
267 483
268static void 484static void
269load_state(pTHX_ Coro__State c) 485load_perl (pTHX_ Coro__State c)
270{ 486{
271 PL_dowarn = c->dowarn; 487 perl_slots *slot = c->slot;
272 PL_in_eval = c->in_eval; 488 c->slot = 0;
273 489
274 PL_curstackinfo = c->curstackinfo;
275 PL_curstack = c->curstack;
276 PL_mainstack = c->mainstack; 490 PL_mainstack = c->mainstack;
277 PL_stack_sp = c->stack_sp;
278 PL_op = c->op;
279 PL_curpad = c->curpad;
280 PL_comppad = c->comppad;
281 PL_compcv = c->compcv;
282 PL_stack_base = c->stack_base;
283 PL_stack_max = c->stack_max;
284 PL_tmps_stack = c->tmps_stack;
285 PL_tmps_floor = c->tmps_floor;
286 PL_tmps_ix = c->tmps_ix;
287 PL_tmps_max = c->tmps_max;
288 PL_markstack = c->markstack;
289 PL_markstack_ptr = c->markstack_ptr;
290 PL_markstack_max = c->markstack_max;
291 PL_scopestack = c->scopestack;
292 PL_scopestack_ix = c->scopestack_ix;
293 PL_scopestack_max = c->scopestack_max;
294 PL_savestack = c->savestack;
295 PL_savestack_ix = c->savestack_ix;
296 PL_savestack_max = c->savestack_max;
297#if PERL_VERSION < 9
298 PL_retstack = c->retstack;
299 PL_retstack_ix = c->retstack_ix;
300 PL_retstack_max = c->retstack_max;
301#endif
302 PL_curpm = c->curpm;
303 PL_curcop = c->curcop;
304 PL_top_env = c->top_env;
305 491
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 492 GvSV (PL_defgv) = slot->defsv;
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 493 GvAV (PL_defgv) = slot->defav;
308 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 494 GvSV (PL_errgv) = slot->errsv;
495 GvSV (irsgv) = slot->irsgv;
496
497 #define VAR(name,type) PL_ ## name = slot->name;
498 # include "state.h"
499 #undef VAR
309 500
310 { 501 {
311 dSP; 502 dSP;
503
312 CV *cv; 504 CV *cv;
313 505
314 /* now do the ugly restore mess */ 506 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs)) 507 while (expect_true (cv = (CV *)POPs))
316 { 508 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */ 509 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist; 510 CvDEPTH (cv) = PTR2IV (POPs);
323 } 511 CvPADLIST (cv) = (AV *)POPs;
324
325 ++CvDEPTH(cv);
326 } 512 }
327 513
328 PUTBACK; 514 PUTBACK;
329 } 515 }
330} 516}
331 517
332static void 518static void
333save_state(pTHX_ Coro__State c, int flags) 519save_perl (pTHX_ Coro__State c)
334{ 520{
335 { 521 {
336 dSP; 522 dSP;
337 I32 cxix = cxstack_ix; 523 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack; 524 PERL_CONTEXT *ccstk = cxstack;
… …
341 /* 527 /*
342 * the worst thing you can imagine happens first - we have to save 528 * the worst thing you can imagine happens first - we have to save
343 * (and reinitialize) all cv's in the whole callchain :( 529 * (and reinitialize) all cv's in the whole callchain :(
344 */ 530 */
345 531
346 PUSHs (Nullsv); 532 XPUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */ 533 /* this loop was inspired by pp_caller */
348 for (;;) 534 for (;;)
349 { 535 {
350 while (cxix >= 0) 536 while (expect_true (cxix >= 0))
351 { 537 {
352 PERL_CONTEXT *cx = &ccstk[cxix--]; 538 PERL_CONTEXT *cx = &ccstk[cxix--];
353 539
354 if (CxTYPE(cx) == CXt_SUB) 540 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355 { 541 {
356 CV *cv = cx->blk_sub.cv; 542 CV *cv = cx->blk_sub.cv;
543
357 if (CvDEPTH(cv)) 544 if (expect_true (CvDEPTH (cv)))
358 { 545 {
359 EXTEND (SP, CvDEPTH(cv)*2); 546 EXTEND (SP, 3);
360
361 while (--CvDEPTH(cv))
362 {
363 /* this tells the restore code to increment CvDEPTH */
364 PUSHs (Nullsv);
365 PUSHs ((SV *)cv);
366 }
367
368 PUSHs ((SV *)CvPADLIST(cv)); 547 PUSHs ((SV *)CvPADLIST (cv));
548 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
369 PUSHs ((SV *)cv); 549 PUSHs ((SV *)cv);
370 550
551 CvDEPTH (cv) = 0;
371 get_padlist (aTHX_ cv); 552 get_padlist (aTHX_ cv);
372 } 553 }
373 } 554 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE(cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 555 }
383 556
384 if (top_si->si_type == PERLSI_MAIN) 557 if (expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 558 break;
386 559
387 top_si = top_si->si_prev; 560 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 561 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 562 cxix = top_si->si_cxix;
390 } 563 }
391 564
392 PUTBACK; 565 PUTBACK;
393 } 566 }
394 567
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 568 /* allocate some space on the context stack for our purposes */
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 569 /* we manually unroll here, as usually 2 slots is enough */
397 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 570 if (SLOT_COUNT >= 1) CXINC;
571 if (SLOT_COUNT >= 2) CXINC;
572 if (SLOT_COUNT >= 3) CXINC;
573 {
574 int i;
575 for (i = 3; i < SLOT_COUNT; ++i)
576 CXINC;
577 }
578 cxstack_ix -= SLOT_COUNT; /* undo allocation */
398 579
399 c->dowarn = PL_dowarn;
400 c->in_eval = PL_in_eval;
401
402 c->curstackinfo = PL_curstackinfo;
403 c->curstack = PL_curstack;
404 c->mainstack = PL_mainstack; 580 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp; 581
406 c->op = PL_op; 582 {
407 c->curpad = PL_curpad; 583 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408 c->comppad = PL_comppad; 584
409 c->compcv = PL_compcv; 585 slot->defav = GvAV (PL_defgv);
410 c->stack_base = PL_stack_base; 586 slot->defsv = DEFSV;
411 c->stack_max = PL_stack_max; 587 slot->errsv = ERRSV;
412 c->tmps_stack = PL_tmps_stack; 588 slot->irsgv = GvSV (irsgv);
413 c->tmps_floor = PL_tmps_floor; 589
414 c->tmps_ix = PL_tmps_ix; 590 #define VAR(name,type) slot->name = PL_ ## name;
415 c->tmps_max = PL_tmps_max; 591 # include "state.h"
416 c->markstack = PL_markstack; 592 #undef VAR
417 c->markstack_ptr = PL_markstack_ptr; 593 }
418 c->markstack_max = PL_markstack_max;
419 c->scopestack = PL_scopestack;
420 c->scopestack_ix = PL_scopestack_ix;
421 c->scopestack_max = PL_scopestack_max;
422 c->savestack = PL_savestack;
423 c->savestack_ix = PL_savestack_ix;
424 c->savestack_max = PL_savestack_max;
425#if PERL_VERSION < 9
426 c->retstack = PL_retstack;
427 c->retstack_ix = PL_retstack_ix;
428 c->retstack_max = PL_retstack_max;
429#endif
430 c->curpm = PL_curpm;
431 c->curcop = PL_curcop;
432 c->top_env = PL_top_env;
433} 594}
434 595
435/* 596/*
436 * allocate various perl stacks. This is an exact copy 597 * allocate various perl stacks. This is an exact copy
437 * of perl.c:init_stacks, except that it uses less memory 598 * of perl.c:init_stacks, except that it uses less memory
438 * on the (sometimes correct) assumption that coroutines do 599 * on the (sometimes correct) assumption that coroutines do
439 * not usually need a lot of stackspace. 600 * not usually need a lot of stackspace.
440 */ 601 */
602#if CORO_PREFER_PERL_FUNCTIONS
603# define coro_init_stacks init_stacks
604#else
441static void 605static void
442coro_init_stacks (pTHX) 606coro_init_stacks (pTHX)
443{ 607{
444 LOCK; 608 PL_curstackinfo = new_stackinfo(32, 8);
445
446 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447 PL_curstackinfo->si_type = PERLSI_MAIN; 609 PL_curstackinfo->si_type = PERLSI_MAIN;
448 PL_curstack = PL_curstackinfo->si_stack; 610 PL_curstack = PL_curstackinfo->si_stack;
449 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 611 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450 612
451 PL_stack_base = AvARRAY(PL_curstack); 613 PL_stack_base = AvARRAY(PL_curstack);
452 PL_stack_sp = PL_stack_base; 614 PL_stack_sp = PL_stack_base;
453 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 615 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454 616
455 New(50,PL_tmps_stack,96,SV*); 617 New(50,PL_tmps_stack,32,SV*);
456 PL_tmps_floor = -1; 618 PL_tmps_floor = -1;
457 PL_tmps_ix = -1; 619 PL_tmps_ix = -1;
458 PL_tmps_max = 96; 620 PL_tmps_max = 32;
459 621
460 New(54,PL_markstack,16,I32); 622 New(54,PL_markstack,16,I32);
461 PL_markstack_ptr = PL_markstack; 623 PL_markstack_ptr = PL_markstack;
462 PL_markstack_max = PL_markstack + 16; 624 PL_markstack_max = PL_markstack + 16;
463 625
464#ifdef SET_MARK_OFFSET 626#ifdef SET_MARK_OFFSET
465 SET_MARK_OFFSET; 627 SET_MARK_OFFSET;
466#endif 628#endif
467 629
468 New(54,PL_scopestack,16,I32); 630 New(54,PL_scopestack,8,I32);
469 PL_scopestack_ix = 0; 631 PL_scopestack_ix = 0;
470 PL_scopestack_max = 16; 632 PL_scopestack_max = 8;
471 633
472 New(54,PL_savestack,96,ANY); 634 New(54,PL_savestack,24,ANY);
473 PL_savestack_ix = 0; 635 PL_savestack_ix = 0;
474 PL_savestack_max = 96; 636 PL_savestack_max = 24;
475 637
476#if PERL_VERSION < 9 638#if !PERL_VERSION_ATLEAST (5,10,0)
477 New(54,PL_retstack,8,OP*); 639 New(54,PL_retstack,4,OP*);
478 PL_retstack_ix = 0; 640 PL_retstack_ix = 0;
479 PL_retstack_max = 8; 641 PL_retstack_max = 4;
480#endif 642#endif
481
482 UNLOCK;
483} 643}
644#endif
484 645
485/* 646/*
486 * destroy the stacks, the callchain etc... 647 * destroy the stacks, the callchain etc...
487 */ 648 */
488static void 649static void
489destroy_stacks(pTHX) 650coro_destruct_stacks (pTHX)
490{ 651{
491 if (!IN_DESTRUCT)
492 {
493 /* is this ugly, I ask? */
494 LEAVE_SCOPE (0);
495
496 /* sure it is, but more important: is it correct?? :/ */
497 FREETMPS;
498
499 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
500 }
501
502 while (PL_curstackinfo->si_next) 652 while (PL_curstackinfo->si_next)
503 PL_curstackinfo = PL_curstackinfo->si_next; 653 PL_curstackinfo = PL_curstackinfo->si_next;
504 654
505 while (PL_curstackinfo) 655 while (PL_curstackinfo)
506 { 656 {
507 PERL_SI *p = PL_curstackinfo->si_prev; 657 PERL_SI *p = PL_curstackinfo->si_prev;
508 658
509 { /*D*//*remove*/
510 dSP;
511 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512 PUTBACK; /* possibly superfluous */
513 }
514
515 if (!IN_DESTRUCT) 659 if (!IN_DESTRUCT)
516 {
517 dounwind (-1);/*D*//*remove*/
518 SvREFCNT_dec (PL_curstackinfo->si_stack); 660 SvREFCNT_dec (PL_curstackinfo->si_stack);
519 }
520 661
521 Safefree (PL_curstackinfo->si_cxstack); 662 Safefree (PL_curstackinfo->si_cxstack);
522 Safefree (PL_curstackinfo); 663 Safefree (PL_curstackinfo);
523 PL_curstackinfo = p; 664 PL_curstackinfo = p;
524 } 665 }
525 666
526 Safefree (PL_tmps_stack); 667 Safefree (PL_tmps_stack);
527 Safefree (PL_markstack); 668 Safefree (PL_markstack);
528 Safefree (PL_scopestack); 669 Safefree (PL_scopestack);
529 Safefree (PL_savestack); 670 Safefree (PL_savestack);
530#if PERL_VERSION < 9 671#if !PERL_VERSION_ATLEAST (5,10,0)
531 Safefree (PL_retstack); 672 Safefree (PL_retstack);
532#endif 673#endif
533} 674}
534 675
535static void 676static size_t
536allocate_stack (Coro__State ctx, int alloc) 677coro_rss (pTHX_ struct coro *coro)
537{ 678{
538 coro_stack *stack; 679 size_t rss = sizeof (*coro);
539 680
540 New (0, stack, 1, coro_stack); 681 if (coro->mainstack)
541
542 stack->refcnt = 1;
543 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0;
545
546 if (alloc)
547 { 682 {
548#if HAVE_MMAP 683 perl_slots tmp_slot;
549 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 684 perl_slots *slot;
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 685
551 if (stack->sptr != (void *)-1) 686 if (coro->flags & CF_RUNNING)
552 { 687 {
553# if STACKGUARD 688 slot = &tmp_slot;
554 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 689
555# endif 690 #define VAR(name,type) slot->name = PL_ ## name;
691 # include "state.h"
692 #undef VAR
556 } 693 }
557 else 694 else
558#endif 695 slot = coro->slot;
696
697 if (slot)
559 { 698 {
560 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 699 rss += sizeof (slot->curstackinfo);
561 New (0, stack->sptr, STACKSIZE, long); 700 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
701 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
702 rss += slot->tmps_max * sizeof (SV *);
703 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
704 rss += slot->scopestack_max * sizeof (I32);
705 rss += slot->savestack_max * sizeof (ANY);
706
707#if !PERL_VERSION_ATLEAST (5,10,0)
708 rss += slot->retstack_max * sizeof (OP *);
709#endif
562 } 710 }
563 } 711 }
564 else
565 stack->sptr = 0;
566 712
567 ctx->stack = stack; 713 return rss;
714}
715
716/** set stacklevel support **************************************************/
717
718/* we sometimes need to create the effect of pp_set_stacklevel calling us */
719#define SSL_HEAD (void)0
720/* we somtimes need to create the effect of leaving via pp_set_stacklevel */
721#define SSL_TAIL set_stacklevel_tail (aTHX)
722
723INLINE void
724set_stacklevel_tail (pTHX)
725{
726 dSP;
727 SV **bot = SP;
728
729 int gimme = GIMME_V;
730
731 /* make sure we put something on the stack in scalar context */
732 if (gimme == G_SCALAR)
733 {
734 if (sp == bot)
735 XPUSHs (&PL_sv_undef);
736
737 SP = bot + 1;
738 }
739
740 PUTBACK;
741}
742
743/** coroutine stack handling ************************************************/
744
745static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
746static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
747static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
748
749/* apparently < 5.8.8 */
750#ifndef MgPV_nolen_const
751#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
752 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
753 (const char*)(mg)->mg_ptr)
754#endif
755
756/*
757 * This overrides the default magic get method of %SIG elements.
758 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
759 * and instead of tryign to save and restore the hash elements, we just provide
760 * readback here.
761 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
762 * not expecting this to actually change the hook. This is a potential problem
763 * when a schedule happens then, but we ignore this.
764 */
765static int
766coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
780 return 0;
781 }
782 }
783
784 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
785}
786
787static int
788coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
789{
790 const char *s = MgPV_nolen_const (mg);
791
792 if (*s == '_')
793 {
794 SV **svp = 0;
795
796 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
797 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
798
799 if (svp)
800 {
801 SV *old = *svp;
802 *svp = 0;
803 SvREFCNT_dec (old);
804 return 0;
805 }
806 }
807
808 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
809}
810
811static int
812coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
813{
814 const char *s = MgPV_nolen_const (mg);
815
816 if (*s == '_')
817 {
818 SV **svp = 0;
819
820 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
821 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
822
823 if (svp)
824 {
825 SV *old = *svp;
826 *svp = newSVsv (sv);
827 SvREFCNT_dec (old);
828 return 0;
829 }
830 }
831
832 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
568} 833}
569 834
570static void 835static void
571deallocate_stack (Coro__State ctx) 836coro_setup (pTHX_ struct coro *coro)
572{
573 coro_stack *stack = ctx->stack;
574
575 ctx->stack = 0;
576
577 if (stack)
578 {
579 if (!--stack->refcnt)
580 {
581#ifdef HAVE_MMAP
582 if (stack->ssize > 0 && stack->sptr)
583 munmap (stack->sptr, stack->ssize);
584 else
585#endif
586 Safefree (stack->sptr);
587
588 Safefree (stack);
589 }
590 else if (ctx->gencnt == stack->gencnt)
591 --stack->usecnt;
592 }
593}
594
595static void
596setup_coro (void *arg)
597{ 837{
598 /* 838 /*
599 * emulate part of the perl startup here. 839 * emulate part of the perl startup here.
600 */ 840 */
601 dTHX;
602 dSP;
603 Coro__State ctx = (Coro__State)arg;
604 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605
606 coro_init_stacks (aTHX); 841 coro_init_stacks (aTHX);
607 /*PL_curcop = 0;*/ 842
608 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 843 PL_runops = RUNOPS_DEFAULT;
844 PL_curcop = &PL_compiling;
845 PL_in_eval = EVAL_NULL;
846 PL_comppad = 0;
847 PL_curpm = 0;
848 PL_curpad = 0;
849 PL_localizing = 0;
850 PL_dirty = 0;
851 PL_restartop = 0;
852#if PERL_VERSION_ATLEAST (5,10,0)
853 PL_parser = 0;
854#endif
855
856 /* recreate the die/warn hooks */
857 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
858 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
859
860 GvSV (PL_defgv) = newSV (0);
861 GvAV (PL_defgv) = coro->args; coro->args = 0;
862 GvSV (PL_errgv) = newSV (0);
863 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
864 PL_rs = newSVsv (GvSV (irsgv));
865 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
866
867 {
868 dSP;
869 UNOP myop;
870
871 Zero (&myop, 1, UNOP);
872 myop.op_next = Nullop;
873 myop.op_flags = OPf_WANT_VOID;
874
875 PUSHMARK (SP);
876 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
877 PUTBACK;
878 PL_op = (OP *)&myop;
879 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
880 SPAGAIN;
881 }
882
883 /* this newly created coroutine might be run on an existing cctx which most
884 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
885 * so we have to emulate entering pp_set_stacklevel here.
886 */
887 SSL_HEAD;
888}
889
890static void
891coro_destruct (pTHX_ struct coro *coro)
892{
893 if (!IN_DESTRUCT)
894 {
895 /* restore all saved variables and stuff */
896 LEAVE_SCOPE (0);
897 assert (PL_tmps_floor == -1);
898
899 /* free all temporaries */
900 FREETMPS;
901 assert (PL_tmps_ix == -1);
902
903 /* unwind all extra stacks */
904 POPSTACK_TO (PL_mainstack);
905
906 /* unwind main stack */
907 dounwind (-1);
908 }
909
910 SvREFCNT_dec (GvSV (PL_defgv));
609 SvREFCNT_dec (GvAV (PL_defgv)); 911 SvREFCNT_dec (GvAV (PL_defgv));
610 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 912 SvREFCNT_dec (GvSV (PL_errgv));
913 SvREFCNT_dec (PL_defoutgv);
914 SvREFCNT_dec (PL_rs);
915 SvREFCNT_dec (GvSV (irsgv));
611 916
612 SPAGAIN; 917 SvREFCNT_dec (PL_diehook);
918 SvREFCNT_dec (PL_warnhook);
919
920 SvREFCNT_dec (coro->saved_deffh);
921 SvREFCNT_dec (coro->throw);
613 922
614 if (ctx->stack) 923 coro_destruct_stacks (aTHX);
615 { 924}
616 ctx->cursp = 0;
617 925
618 PUSHMARK(SP); 926INLINE void
619 PUTBACK; 927free_coro_mortal (pTHX)
620 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 928{
621 929 if (expect_true (coro_mortal))
622 if (SvTRUE (ERRSV))
623 croak (NULL);
624 else
625 croak ("FATAL: CCTXT coroutine returned!");
626 } 930 {
627 else 931 SvREFCNT_dec (coro_mortal);
932 coro_mortal = 0;
628 { 933 }
629 UNOP myop; 934}
630 935
631 Zero(&myop, 1, UNOP); 936static int
632 myop.op_next = Nullop; 937runops_trace (pTHX)
633 myop.op_flags = OPf_WANT_VOID; 938{
939 COP *oldcop = 0;
940 int oldcxix = -2;
941 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
942 coro_cctx *cctx = coro->cctx;
634 943
635 PL_op = (OP *)&myop; 944 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
636
637 PUSHMARK(SP);
638 XPUSHs (sub_init);
639 /*
640 * the next line is slightly wrong, as PL_op->op_next
641 * is actually being executed so we skip the first op.
642 * that doesn't matter, though, since it is only
643 * pp_nextstate and we never return...
644 * ah yes, and I don't care anyways ;)
645 */
646 PUTBACK;
647 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648 SPAGAIN;
649
650 ENTER; /* necessary e.g. for dounwind */
651 } 945 {
652} 946 PERL_ASYNC_CHECK ();
653 947
654static void 948 if (cctx->flags & CC_TRACE_ALL)
655continue_coro (void *arg)
656{
657 /*
658 * this is a _very_ stripped down perl interpreter ;)
659 */
660 dTHX;
661 Coro__State ctx = (Coro__State)arg;
662
663 PL_top_env = &PL_start_env;
664
665 ctx->cursp = 0;
666 PL_op = PL_op->op_next;
667 CALLRUNOPS(aTHX);
668
669 abort ();
670}
671
672/* never call directly, always through the coro_state_transfer global variable */
673static void
674transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
675{
676 dSTACKLEVEL;
677
678 if (prev != next)
679 {
680 /* has this coro been created yet? */
681 if (next->mainstack)
682 { 949 {
683 LOCK; 950 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
684 SAVE (prev, flags);
685 LOAD (next);
686 UNLOCK;
687
688 /* mark this state as in-use */
689 next->mainstack = 0;
690 next->tmps_ix = -2;
691
692 /* stacklevel changed? if yes, grab the stack for us! */
693 if (flags & TRANSFER_SAVE_CCTXT)
694 { 951 {
695 if (!prev->stack) 952 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
696 allocate_stack (prev, 0); 953 SV **bot, **top;
697 else if (prev->cursp != stacklevel 954 AV *av = newAV (); /* return values */
698 && prev->stack->usecnt > 1) 955 SV **cb;
956 dSP;
957
958 GV *gv = CvGV (cx->blk_sub.cv);
959 SV *fullname = sv_2mortal (newSV (0));
960 if (isGV (gv))
961 gv_efullname3 (fullname, gv, 0);
962
963 bot = PL_stack_base + cx->blk_oldsp + 1;
964 top = cx->blk_gimme == G_ARRAY ? SP + 1
965 : cx->blk_gimme == G_SCALAR ? bot + 1
966 : bot;
967
968 av_extend (av, top - bot);
969 while (bot < top)
970 av_push (av, SvREFCNT_inc_NN (*bot++));
971
972 PL_runops = RUNOPS_DEFAULT;
973 ENTER;
974 SAVETMPS;
975 EXTEND (SP, 3);
976 PUSHMARK (SP);
977 PUSHs (&PL_sv_no);
978 PUSHs (fullname);
979 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
980 PUTBACK;
981 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
982 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
983 SPAGAIN;
984 FREETMPS;
985 LEAVE;
986 PL_runops = runops_trace;
987 }
988
989 if (oldcop != PL_curcop)
990 {
991 oldcop = PL_curcop;
992
993 if (PL_curcop != &PL_compiling)
699 { 994 {
700 prev->gencnt = ++prev->stack->gencnt; 995 SV **cb;
701 prev->stack->usecnt = 1;
702 }
703 996
704 /* has our stack been invalidated? */ 997 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
705 if (next->stack && next->stack->gencnt != next->gencnt)
706 { 998 {
707 deallocate_stack (next); 999 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
708 allocate_stack (next, 1); 1000
709 coro_create (&(next->stack->cctx), 1001 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
710 continue_coro, (void *)next, 1002 {
711 next->stack->sptr, labs (next->stack->ssize)); 1003 runops_proc_t old_runops = PL_runops;
1004 dSP;
1005 GV *gv = CvGV (cx->blk_sub.cv);
1006 SV *fullname = sv_2mortal (newSV (0));
1007
1008 if (isGV (gv))
1009 gv_efullname3 (fullname, gv, 0);
1010
1011 PL_runops = RUNOPS_DEFAULT;
1012 ENTER;
1013 SAVETMPS;
1014 EXTEND (SP, 3);
1015 PUSHMARK (SP);
1016 PUSHs (&PL_sv_yes);
1017 PUSHs (fullname);
1018 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1019 PUTBACK;
1020 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1021 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1022 SPAGAIN;
1023 FREETMPS;
1024 LEAVE;
1025 PL_runops = runops_trace;
1026 }
1027
1028 oldcxix = cxstack_ix;
712 } 1029 }
713 1030
714 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1031 if (cctx->flags & CC_TRACE_LINE)
715 prev->cursp = stacklevel;
716 /* don't add any code here */
717 }
718 else
719 next->cursp = stacklevel;
720 }
721 else if (next->tmps_ix == -2)
722 croak ("tried to transfer to running coroutine");
723 else
724 {
725 LOCK;
726 SAVE (prev, -1); /* first get rid of the old state */
727 UNLOCK;
728
729 /* create the coroutine for the first time */
730 if (flags & TRANSFER_SAVE_CCTXT)
731 {
732 if (!prev->stack)
733 allocate_stack (prev, 0);
734
735 /* the new coroutine starts with start_env again */
736 PL_top_env = &PL_start_env;
737
738 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
739 { 1032 {
740 setup_coro (next); 1033 dSP;
741 next->cursp = stacklevel;
742 1034
743 prev->stack->refcnt++; 1035 PL_runops = RUNOPS_DEFAULT;
744 prev->stack->usecnt++; 1036 ENTER;
745 next->stack = prev->stack; 1037 SAVETMPS;
746 next->gencnt = prev->gencnt; 1038 EXTEND (SP, 3);
1039 PL_runops = RUNOPS_DEFAULT;
1040 PUSHMARK (SP);
1041 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1042 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1043 PUTBACK;
1044 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1045 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1046 SPAGAIN;
1047 FREETMPS;
1048 LEAVE;
1049 PL_runops = runops_trace;
747 } 1050 }
748 else
749 {
750 assert (!next->stack);
751 allocate_stack (next, 1);
752 coro_create (&(next->stack->cctx),
753 setup_coro, (void *)next,
754 next->stack->sptr, labs (next->stack->ssize));
755 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
756 prev->cursp = stacklevel;
757 /* don't add any code here */
758 } 1051 }
759 } 1052 }
760 else
761 {
762 setup_coro (next);
763 next->cursp = stacklevel;
764 }
765 } 1053 }
766 } 1054 }
767 1055
1056 TAINT_NOT;
1057 return 0;
1058}
1059
1060static void
1061prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1062{
1063 ta->prev = (struct coro *)cctx;
1064 ta->next = 0;
1065}
1066
1067/* inject a fake call to Coro::State::_cctx_init into the execution */
1068/* _cctx_init should be careful, as it could be called at almost any time */
1069/* during execution of a perl program */
1070/* also initialises PL_top_env */
1071static void NOINLINE
1072cctx_prepare (pTHX_ coro_cctx *cctx)
1073{
1074 dSP;
1075 UNOP myop;
1076
1077 PL_top_env = &PL_start_env;
1078
1079 if (cctx->flags & CC_TRACE)
1080 PL_runops = runops_trace;
1081
1082 Zero (&myop, 1, UNOP);
1083 myop.op_next = PL_op;
1084 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1085
1086 PUSHMARK (SP);
1087 EXTEND (SP, 2);
1088 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1089 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1090 PUTBACK;
1091 PL_op = (OP *)&myop;
1092 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1093 SPAGAIN;
1094}
1095
1096/* the tail of transfer: execute stuff we can only do after a transfer */
1097INLINE void
1098transfer_tail (pTHX)
1099{
1100 struct coro *next = (struct coro *)transfer_next;
1101 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1102 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1103
1104 free_coro_mortal (aTHX);
1105 UNLOCK;
1106
1107 if (expect_false (next->throw))
1108 {
1109 SV *exception = sv_2mortal (next->throw);
1110
1111 next->throw = 0;
1112 sv_setsv (ERRSV, exception);
1113 croak (0);
1114 }
1115}
1116
1117/*
1118 * this is a _very_ stripped down perl interpreter ;)
1119 */
1120static void
1121cctx_run (void *arg)
1122{
1123#ifdef USE_ITHREADS
1124# if CORO_PTHREAD
1125 PERL_SET_CONTEXT (coro_thx);
1126# endif
1127#endif
1128 {
1129 dTHX;
1130
1131 /* we are the alternative tail to pp_set_stacklevel */
1132 /* so do the same things here */
1133 SSL_TAIL;
1134
1135 /* we now skip the op that did lead to transfer() */
1136 PL_op = PL_op->op_next;
1137
1138 /* inject a fake subroutine call to cctx_init */
1139 cctx_prepare (aTHX_ (coro_cctx *)arg);
1140
1141 /* cctx_run is the alternative tail of transfer() */
1142 transfer_tail (aTHX);
1143
1144 /* somebody or something will hit me for both perl_run and PL_restartop */
1145 PL_restartop = PL_op;
1146 perl_run (PL_curinterp);
1147
1148 /*
1149 * If perl-run returns we assume exit() was being called or the coro
1150 * fell off the end, which seems to be the only valid (non-bug)
1151 * reason for perl_run to return. We try to exit by jumping to the
1152 * bootstrap-time "top" top_env, as we cannot restore the "main"
1153 * coroutine as Coro has no such concept
1154 */
1155 PL_top_env = main_top_env;
1156 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1157 }
1158}
1159
1160static coro_cctx *
1161cctx_new ()
1162{
1163 coro_cctx *cctx;
1164
1165 ++cctx_count;
1166 New (0, cctx, 1, coro_cctx);
1167
1168 cctx->gen = cctx_gen;
1169 cctx->flags = 0;
1170 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1171
1172 return cctx;
1173}
1174
1175/* create a new cctx only suitable as source */
1176static coro_cctx *
1177cctx_new_empty ()
1178{
1179 coro_cctx *cctx = cctx_new ();
1180
1181 cctx->sptr = 0;
1182 coro_create (&cctx->cctx, 0, 0, 0, 0);
1183
1184 return cctx;
1185}
1186
1187/* create a new cctx suitable as destination/running a perl interpreter */
1188static coro_cctx *
1189cctx_new_run ()
1190{
1191 coro_cctx *cctx = cctx_new ();
1192 void *stack_start;
1193 size_t stack_size;
1194
1195#if HAVE_MMAP
1196 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1197 /* mmap supposedly does allocate-on-write for us */
1198 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1199
1200 if (cctx->sptr != (void *)-1)
1201 {
1202 #if CORO_STACKGUARD
1203 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1204 #endif
1205 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1206 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1207 cctx->flags |= CC_MAPPED;
1208 }
1209 else
1210#endif
1211 {
1212 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1213 New (0, cctx->sptr, cctx_stacksize, long);
1214
1215 if (!cctx->sptr)
1216 {
1217 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1218 _exit (EXIT_FAILURE);
1219 }
1220
1221 stack_start = cctx->sptr;
1222 stack_size = cctx->ssize;
1223 }
1224
1225 #if CORO_USE_VALGRIND
1226 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1227 #endif
1228
1229 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1230
1231 return cctx;
1232}
1233
1234static void
1235cctx_destroy (coro_cctx *cctx)
1236{
1237 if (!cctx)
1238 return;
1239
1240 --cctx_count;
1241 coro_destroy (&cctx->cctx);
1242
1243 /* coro_transfer creates new, empty cctx's */
1244 if (cctx->sptr)
1245 {
1246 #if CORO_USE_VALGRIND
1247 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1248 #endif
1249
1250#if HAVE_MMAP
1251 if (cctx->flags & CC_MAPPED)
1252 munmap (cctx->sptr, cctx->ssize);
1253 else
1254#endif
1255 Safefree (cctx->sptr);
1256 }
1257
1258 Safefree (cctx);
1259}
1260
1261/* wether this cctx should be destructed */
1262#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1263
1264static coro_cctx *
1265cctx_get (pTHX)
1266{
1267 while (expect_true (cctx_first))
1268 {
1269 coro_cctx *cctx = cctx_first;
1270 cctx_first = cctx->next;
1271 --cctx_idle;
1272
1273 if (expect_true (!CCTX_EXPIRED (cctx)))
1274 return cctx;
1275
1276 cctx_destroy (cctx);
1277 }
1278
1279 return cctx_new_run ();
1280}
1281
1282static void
1283cctx_put (coro_cctx *cctx)
1284{
1285 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1286
1287 /* free another cctx if overlimit */
1288 if (expect_false (cctx_idle >= cctx_max_idle))
1289 {
1290 coro_cctx *first = cctx_first;
1291 cctx_first = first->next;
1292 --cctx_idle;
1293
1294 cctx_destroy (first);
1295 }
1296
1297 ++cctx_idle;
1298 cctx->next = cctx_first;
1299 cctx_first = cctx;
1300}
1301
1302/** coroutine switching *****************************************************/
1303
1304static void
1305transfer_check (pTHX_ struct coro *prev, struct coro *next)
1306{
1307 if (expect_true (prev != next))
1308 {
1309 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1310 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1311
1312 if (expect_false (next->flags & CF_RUNNING))
1313 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1314
1315 if (expect_false (next->flags & CF_DESTROYED))
1316 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1317
1318#if !PERL_VERSION_ATLEAST (5,10,0)
1319 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1320 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1321#endif
1322 }
1323}
1324
1325/* always use the TRANSFER macro */
1326static void NOINLINE
1327transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1328{
1329 dSTACKLEVEL;
1330
1331 /* sometimes transfer is only called to set idle_sp */
1332 if (expect_false (!next))
1333 {
1334 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1335 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1336 }
1337 else if (expect_true (prev != next))
1338 {
1339 coro_cctx *prev__cctx;
1340
1341 if (expect_false (prev->flags & CF_NEW))
1342 {
1343 /* create a new empty/source context */
1344 prev->cctx = cctx_new_empty ();
1345 prev->flags &= ~CF_NEW;
1346 prev->flags |= CF_RUNNING;
1347 }
1348
1349 prev->flags &= ~CF_RUNNING;
1350 next->flags |= CF_RUNNING;
1351
1352 LOCK;
1353
1354 /* first get rid of the old state */
1355 save_perl (aTHX_ prev);
1356
1357 if (expect_false (next->flags & CF_NEW))
1358 {
1359 /* need to start coroutine */
1360 next->flags &= ~CF_NEW;
1361 /* setup coroutine call */
1362 coro_setup (aTHX_ next);
1363 }
1364 else
1365 load_perl (aTHX_ next);
1366
1367 prev__cctx = prev->cctx;
1368
1369 /* possibly untie and reuse the cctx */
1370 if (expect_true (
1371 prev__cctx->idle_sp == STACKLEVEL
1372 && !(prev__cctx->flags & CC_TRACE)
1373 && !force_cctx
1374 ))
1375 {
1376 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1377 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1378
1379 prev->cctx = 0;
1380
1381 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1382 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1383 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1384 if (!next->cctx)
1385 next->cctx = cctx_get (aTHX);
1386
1387 cctx_put (prev__cctx);
1388 }
1389
1390 ++next->usecount;
1391
1392 if (expect_true (!next->cctx))
1393 next->cctx = cctx_get (aTHX);
1394
1395 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1396 transfer_next = next;
1397
1398 if (expect_false (prev__cctx != next->cctx))
1399 {
1400 prev__cctx->top_env = PL_top_env;
1401 PL_top_env = next->cctx->top_env;
1402 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1403 }
1404
1405 transfer_tail (aTHX);
1406 }
1407}
1408
1409#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1410#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1411
1412/** high level stuff ********************************************************/
1413
1414static int
1415coro_state_destroy (pTHX_ struct coro *coro)
1416{
1417 if (coro->flags & CF_DESTROYED)
1418 return 0;
1419
1420 coro->flags |= CF_DESTROYED;
1421
1422 if (coro->flags & CF_READY)
1423 {
1424 /* reduce nready, as destroying a ready coro effectively unreadies it */
1425 /* alternative: look through all ready queues and remove the coro */
1426 LOCK;
1427 --coro_nready;
1428 UNLOCK;
1429 }
1430 else
1431 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1432
1433 if (coro->mainstack && coro->mainstack != main_mainstack)
1434 {
1435 struct coro temp;
1436
1437 if (coro->flags & CF_RUNNING)
1438 croak ("FATAL: tried to destroy currently running coroutine");
1439
1440 save_perl (aTHX_ &temp);
1441 load_perl (aTHX_ coro);
1442
1443 coro_destruct (aTHX_ coro);
1444
1445 load_perl (aTHX_ &temp);
1446
1447 coro->slot = 0;
1448 }
1449
1450 cctx_destroy (coro->cctx);
1451 SvREFCNT_dec (coro->args);
1452
1453 if (coro->next) coro->next->prev = coro->prev;
1454 if (coro->prev) coro->prev->next = coro->next;
1455 if (coro == coro_first) coro_first = coro->next;
1456
1457 return 1;
1458}
1459
1460static int
1461coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1462{
1463 struct coro *coro = (struct coro *)mg->mg_ptr;
1464 mg->mg_ptr = 0;
1465
1466 coro->hv = 0;
1467
1468 if (--coro->refcnt < 0)
1469 {
1470 coro_state_destroy (aTHX_ coro);
1471 Safefree (coro);
1472 }
1473
1474 return 0;
1475}
1476
1477static int
1478coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1479{
1480 struct coro *coro = (struct coro *)mg->mg_ptr;
1481
1482 ++coro->refcnt;
1483
1484 return 0;
1485}
1486
1487static MGVTBL coro_state_vtbl = {
1488 0, 0, 0, 0,
1489 coro_state_free,
1490 0,
1491#ifdef MGf_DUP
1492 coro_state_dup,
1493#else
1494# define MGf_DUP 0
1495#endif
1496};
1497
1498static void
1499prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1500{
1501 ta->prev = SvSTATE (prev_sv);
1502 ta->next = SvSTATE (next_sv);
1503 TRANSFER_CHECK (*ta);
1504}
1505
1506static void
1507api_transfer (SV *prev_sv, SV *next_sv)
1508{
1509 dTHX;
1510 struct transfer_args ta;
1511
1512 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1513 TRANSFER (ta, 1);
1514}
1515
1516/** Coro ********************************************************************/
1517
1518static void
1519coro_enq (pTHX_ SV *coro_sv)
1520{
1521 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1522}
1523
1524static SV *
1525coro_deq (pTHX)
1526{
1527 int prio;
1528
1529 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1530 if (AvFILLp (coro_ready [prio]) >= 0)
1531 return av_shift (coro_ready [prio]);
1532
1533 return 0;
1534}
1535
1536static int
1537api_ready (SV *coro_sv)
1538{
1539 dTHX;
1540 struct coro *coro;
1541 SV *sv_hook;
1542 void (*xs_hook)(void);
1543
1544 if (SvROK (coro_sv))
1545 coro_sv = SvRV (coro_sv);
1546
1547 coro = SvSTATE (coro_sv);
1548
1549 if (coro->flags & CF_READY)
1550 return 0;
1551
1552 coro->flags |= CF_READY;
1553
768 LOCK; 1554 LOCK;
769 if (coro_mortal) 1555
770 { 1556 sv_hook = coro_nready ? 0 : coro_readyhook;
771 SvREFCNT_dec (coro_mortal); 1557 xs_hook = coro_nready ? 0 : coroapi.readyhook;
772 coro_mortal = 0; 1558
773 } 1559 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1560 ++coro_nready;
1561
774 UNLOCK; 1562 UNLOCK;
775} 1563
776 1564 if (sv_hook)
777/* use this function pointer to call the above function */
778/* this is done to increase chances of the compiler not inlining the call */
779void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
780
781#define SV_CORO(sv,func) \
782 do { \
783 if (SvROK (sv)) \
784 sv = SvRV (sv); \
785 \
786 if (SvTYPE (sv) == SVt_PVHV) \
787 { \
788 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
789 \
790 if (!he) \
791 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
792 \
793 (sv) = SvRV (HeVAL(he)); \
794 } \
795 \
796 /* must also be changed inside Coro::Cont::yield */ \
797 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
798 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
799 \
800 } while(0)
801
802#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv))
803
804static void
805api_transfer (pTHX_ SV *prev, SV *next, int flags)
806{
807 SV_CORO (prev, "Coro::transfer");
808 SV_CORO (next, "Coro::transfer");
809
810 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
811}
812
813/** Coro ********************************************************************/
814
815#define PRIO_MAX 3
816#define PRIO_HIGH 1
817#define PRIO_NORMAL 0
818#define PRIO_LOW -1
819#define PRIO_IDLE -3
820#define PRIO_MIN -4
821
822/* for Coro.pm */
823static GV *coro_current, *coro_idle;
824static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
825static int coro_nready;
826
827static void
828coro_enq (pTHX_ SV *sv)
829{
830 SV **xprio;
831 int prio;
832
833 if (SvTYPE (sv) != SVt_PVHV)
834 croak ("Coro::ready tried to enqueue something that is not a coroutine");
835
836 xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
837 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
838
839 prio = prio > PRIO_MAX ? PRIO_MAX
840 : prio < PRIO_MIN ? PRIO_MIN
841 : prio;
842
843 av_push (coro_ready [prio - PRIO_MIN], sv);
844 coro_nready++;
845}
846
847static SV *
848coro_deq (pTHX_ int min_prio)
849{
850 int prio = PRIO_MAX - PRIO_MIN;
851
852 min_prio -= PRIO_MIN;
853 if (min_prio < 0)
854 min_prio = 0;
855
856 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
857 if (AvFILLp (coro_ready [prio]) >= 0)
858 { 1565 {
859 coro_nready--; 1566 dSP;
860 return av_shift (coro_ready [prio]); 1567
1568 ENTER;
1569 SAVETMPS;
1570
1571 PUSHMARK (SP);
1572 PUTBACK;
1573 call_sv (sv_hook, G_DISCARD);
1574 SPAGAIN;
1575
1576 FREETMPS;
1577 LEAVE;
861 } 1578 }
862 1579
1580 if (xs_hook)
1581 xs_hook ();
1582
863 return 0; 1583 return 1;
864} 1584}
865 1585
866static void 1586static int
867api_ready (SV *coro) 1587api_is_ready (SV *coro_sv)
868{ 1588{
869 dTHX; 1589 dTHX;
870 1590
871 if (SvROK (coro)) 1591 return !!(SvSTATE (coro_sv)->flags & CF_READY);
872 coro = SvRV (coro); 1592}
1593
1594INLINE void
1595prepare_schedule (pTHX_ struct transfer_args *ta)
1596{
1597 SV *prev_sv, *next_sv;
1598
1599 for (;;)
1600 {
1601 LOCK;
1602 next_sv = coro_deq (aTHX);
1603
1604 /* nothing to schedule: call the idle handler */
1605 if (expect_false (!next_sv))
1606 {
1607 dSP;
1608 UNLOCK;
1609
1610 ENTER;
1611 SAVETMPS;
1612
1613 PUSHMARK (SP);
1614 PUTBACK;
1615 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1616 SPAGAIN;
1617
1618 FREETMPS;
1619 LEAVE;
1620 continue;
1621 }
1622
1623 ta->next = SvSTATE (next_sv);
1624
1625 /* cannot transfer to destroyed coros, skip and look for next */
1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1627 {
1628 UNLOCK;
1629 SvREFCNT_dec (next_sv);
1630 /* coro_nready has already been taken care of by destroy */
1631 continue;
1632 }
1633
1634 --coro_nready;
1635 UNLOCK;
1636 break;
1637 }
1638
1639 /* free this only after the transfer */
1640 prev_sv = SvRV (coro_current);
1641 ta->prev = SvSTATE (prev_sv);
1642 TRANSFER_CHECK (*ta);
1643 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1644 ta->next->flags &= ~CF_READY;
1645 SvRV_set (coro_current, next_sv);
873 1646
874 LOCK; 1647 LOCK;
875 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1648 free_coro_mortal (aTHX);
1649 coro_mortal = prev_sv;
876 UNLOCK; 1650 UNLOCK;
1651}
1652
1653INLINE void
1654prepare_cede (pTHX_ struct transfer_args *ta)
1655{
1656 api_ready (coro_current);
1657 prepare_schedule (aTHX_ ta);
1658}
1659
1660static int
1661prepare_cede_notself (pTHX_ struct transfer_args *ta)
1662{
1663 if (coro_nready)
1664 {
1665 SV *prev = SvRV (coro_current);
1666 prepare_schedule (aTHX_ ta);
1667 api_ready (prev);
1668 return 1;
1669 }
1670 else
1671 return 0;
877} 1672}
878 1673
879static void 1674static void
880api_schedule (void) 1675api_schedule (void)
881{ 1676{
882 dTHX; 1677 dTHX;
1678 struct transfer_args ta;
883 1679
884 SV *prev, *next; 1680 prepare_schedule (aTHX_ &ta);
1681 TRANSFER (ta, 1);
1682}
885 1683
886 LOCK; 1684static int
1685api_cede (void)
1686{
1687 dTHX;
1688 struct transfer_args ta;
887 1689
888 prev = SvRV (GvSV (coro_current)); 1690 prepare_cede (aTHX_ &ta);
889 next = coro_deq (aTHX_ PRIO_MIN);
890 1691
891 if (!next) 1692 if (expect_true (ta.prev != ta.next))
892 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1693 {
1694 TRANSFER (ta, 1);
1695 return 1;
1696 }
1697 else
1698 return 0;
1699}
893 1700
894 /* free this only after the transfer */ 1701static int
895 coro_mortal = prev; 1702api_cede_notself (void)
896 SV_CORO (prev, "Coro::schedule"); 1703{
1704 dTHX;
1705 struct transfer_args ta;
897 1706
898 SvRV (GvSV (coro_current)) = next; 1707 if (prepare_cede_notself (aTHX_ &ta))
899 1708 {
900 SV_CORO (next, "Coro::schedule"); 1709 TRANSFER (ta, 1);
901 1710 return 1;
902 UNLOCK; 1711 }
903 1712 else
904 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1713 return 0;
905 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
906} 1714}
907 1715
908static void 1716static void
909api_cede (void) 1717api_trace (SV *coro_sv, int flags)
910{ 1718{
911 dTHX; 1719 dTHX;
1720 struct coro *coro = SvSTATE (coro_sv);
912 1721
913 LOCK; 1722 if (flags & CC_TRACE)
914 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1723 {
915 UNLOCK; 1724 if (!coro->cctx)
1725 coro->cctx = cctx_new_run ();
1726 else if (!(coro->cctx->flags & CC_TRACE))
1727 croak ("cannot enable tracing on coroutine with custom stack");
916 1728
1729 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1730 }
1731 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1732 {
1733 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1734
1735 if (coro->flags & CF_RUNNING)
1736 PL_runops = RUNOPS_DEFAULT;
1737 else
1738 coro->slot->runops = RUNOPS_DEFAULT;
1739 }
1740}
1741
1742#if 0
1743static int
1744coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1745{
1746 AV *padlist;
1747 AV *av = (AV *)mg->mg_obj;
1748
1749 abort ();
1750
1751 return 0;
1752}
1753
1754static MGVTBL coro_gensub_vtbl = {
1755 0, 0, 0, 0,
1756 coro_gensub_free
1757};
1758#endif
1759
1760/*****************************************************************************/
1761/* PerlIO::cede */
1762
1763typedef struct
1764{
1765 PerlIOBuf base;
1766 NV next, every;
1767} PerlIOCede;
1768
1769static IV
1770PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1771{
1772 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1773
1774 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1775 self->next = nvtime () + self->every;
1776
1777 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1778}
1779
1780static SV *
1781PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1782{
1783 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1784
1785 return newSVnv (self->every);
1786}
1787
1788static IV
1789PerlIOCede_flush (pTHX_ PerlIO *f)
1790{
1791 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1792 double now = nvtime ();
1793
1794 if (now >= self->next)
1795 {
917 api_schedule (); 1796 api_cede ();
918} 1797 self->next = now + self->every;
1798 }
919 1799
1800 return PerlIOBuf_flush (aTHX_ f);
1801}
1802
1803static PerlIO_funcs PerlIO_cede =
1804{
1805 sizeof(PerlIO_funcs),
1806 "cede",
1807 sizeof(PerlIOCede),
1808 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1809 PerlIOCede_pushed,
1810 PerlIOBuf_popped,
1811 PerlIOBuf_open,
1812 PerlIOBase_binmode,
1813 PerlIOCede_getarg,
1814 PerlIOBase_fileno,
1815 PerlIOBuf_dup,
1816 PerlIOBuf_read,
1817 PerlIOBuf_unread,
1818 PerlIOBuf_write,
1819 PerlIOBuf_seek,
1820 PerlIOBuf_tell,
1821 PerlIOBuf_close,
1822 PerlIOCede_flush,
1823 PerlIOBuf_fill,
1824 PerlIOBase_eof,
1825 PerlIOBase_error,
1826 PerlIOBase_clearerr,
1827 PerlIOBase_setlinebuf,
1828 PerlIOBuf_get_base,
1829 PerlIOBuf_bufsiz,
1830 PerlIOBuf_get_ptr,
1831 PerlIOBuf_get_cnt,
1832 PerlIOBuf_set_ptrcnt,
1833};
1834
1835/*****************************************************************************/
1836
1837static const CV *ssl_cv; /* for quick consistency check */
1838
1839static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1840static SV *ssl_arg0;
1841static SV *ssl_arg1;
1842
1843/* this restores the stack in the case we patched the entersub, to */
1844/* recreate the stack frame as perl will on following calls */
1845/* since entersub cleared the stack */
1846static OP *
1847pp_restore (pTHX)
1848{
1849 dSP;
1850
1851 PUSHMARK (SP);
1852
1853 EXTEND (SP, 3);
1854 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;
1855 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1856 PUSHs ((SV *)CvGV (ssl_cv));
1857
1858 RETURNOP (ssl_restore.op_first);
1859}
1860
1861/* declare prototype */
1862XS(XS_Coro__State__set_stacklevel);
1863
1864#define OPpENTERSUB_SSL 15
1865
1866static OP *
1867pp_set_stacklevel (pTHX)
1868{
1869 dSP;
1870 struct transfer_args ta;
1871 SV **arg = PL_stack_base + TOPMARK + 1;
1872 int items = SP - arg; /* args without function object */
1873
1874 /* do a quick consistency check on the "function" object, and if it isn't */
1875 /* for us, divert to the real entersub */
1876 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1877 return PL_ppaddr[OP_ENTERSUB](aTHX);
1878
1879 /* pop args */
1880 SP = PL_stack_base + POPMARK;
1881
1882 if (!(PL_op->op_flags & OPf_STACKED))
1883 {
1884 /* ampersand-form of call, use @_ instead of stack */
1885 AV *av = GvAV (PL_defgv);
1886 arg = AvARRAY (av);
1887 items = AvFILLp (av) + 1;
1888 }
1889
1890 PUTBACK;
1891 switch (PL_op->op_private & OPpENTERSUB_SSL)
1892 {
1893 case 0:
1894 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1895 break;
1896
1897 case 1:
1898 if (items != 2)
1899 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1900
1901 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1902 break;
1903
1904 case 2:
1905 prepare_schedule (aTHX_ &ta);
1906 break;
1907
1908 case 3:
1909 prepare_cede (aTHX_ &ta);
1910 break;
1911
1912 case 4:
1913 if (!prepare_cede_notself (aTHX_ &ta))
1914 goto skip;
1915
1916 break;
1917 }
1918
1919 TRANSFER (ta, 0);
1920 SPAGAIN;
1921
1922skip:
1923 PUTBACK;
1924 SSL_TAIL;
1925 SPAGAIN;
1926 RETURN;
1927}
1928
920MODULE = Coro::State PACKAGE = Coro::State 1929MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
921 1930
922PROTOTYPES: ENABLE 1931PROTOTYPES: DISABLE
1932
1933# these not obviously related functions are all rolled into the same xs
1934# function to increase chances that they all will call transfer with the same
1935# stack offset
1936void
1937_set_stacklevel (...)
1938 ALIAS:
1939 Coro::State::transfer = 1
1940 Coro::schedule = 2
1941 Coro::cede = 3
1942 Coro::cede_notself = 4
1943 CODE:
1944{
1945 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1946
1947 assert (("FATAL: ssl call with illegal CV value", CvGV (cv)));
1948 ssl_cv = cv;
1949
1950 /* we patch the op, and then re-run the whole call */
1951 /* we have to put some dummy argument on the stack for this to work */
1952 ssl_restore.op_next = (OP *)&ssl_restore;
1953 ssl_restore.op_type = OP_NULL;
1954 ssl_restore.op_ppaddr = pp_restore;
1955 ssl_restore.op_first = PL_op;
1956
1957 ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1958 ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1959
1960 PL_op->op_ppaddr = pp_set_stacklevel;
1961 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SSL | ix; /* we potentially share our private flags with entersub */
1962
1963 PL_op = (OP *)&ssl_restore;
1964}
923 1965
924BOOT: 1966BOOT:
925{ /* {} necessary for stoopid perl-5.6.x */ 1967{
926#ifdef USE_ITHREADS 1968#ifdef USE_ITHREADS
927 MUTEX_INIT (&coro_mutex); 1969 MUTEX_INIT (&coro_lock);
1970# if CORO_PTHREAD
1971 coro_thx = PERL_GET_CONTEXT;
1972# endif
928#endif 1973#endif
929 BOOT_PAGESIZE; 1974 BOOT_PAGESIZE;
930 1975
931 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1976 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
932 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1977 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1978
1979 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1980 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1981 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1982
1983 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1984 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1985 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1986
933 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1987 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934 1988
935 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1989 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
936 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1990 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
937 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1991 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
938 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1992 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
939 1993
940 main_mainstack = PL_mainstack; 1994 main_mainstack = PL_mainstack;
1995 main_top_env = PL_top_env;
941 1996
1997 while (main_top_env->je_prev)
1998 main_top_env = main_top_env->je_prev;
1999
942 coroapi.ver = CORO_API_VERSION; 2000 coroapi.ver = CORO_API_VERSION;
2001 coroapi.rev = CORO_API_REVISION;
943 coroapi.transfer = api_transfer; 2002 coroapi.transfer = api_transfer;
944}
945 2003
946Coro::State 2004 {
2005 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2006
2007 if (!svp) croak ("Time::HiRes is required");
2008 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2009
2010 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2011 }
2012
2013 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2014}
2015
2016SV *
947new (char *klass, ...) 2017new (char *klass, ...)
948 PROTOTYPE: $@
949 CODE: 2018 CODE:
950{ 2019{
951 Coro__State coro; 2020 struct coro *coro;
2021 MAGIC *mg;
2022 HV *hv;
952 int i; 2023 int i;
953 2024
954 if (!SvOK (ST (1)))
955 croak ("Coro::State::new needs something callable as first argument");
956
957 Newz (0, coro, 1, struct coro); 2025 Newz (0, coro, 1, struct coro);
958 coro->args = newAV (); 2026 coro->args = newAV ();
2027 coro->flags = CF_NEW;
959 2028
2029 if (coro_first) coro_first->prev = coro;
2030 coro->next = coro_first;
2031 coro_first = coro;
2032
2033 coro->hv = hv = newHV ();
2034 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2035 mg->mg_flags |= MGf_DUP;
2036 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2037
2038 av_extend (coro->args, items - 1);
960 for (i = 1; i < items; i++) 2039 for (i = 1; i < items; i++)
961 av_push (coro->args, newSVsv (ST (i))); 2040 av_push (coro->args, newSVsv (ST (i)));
962
963 RETVAL = coro;
964
965 /*coro->mainstack = 0; *//*actual work is done inside transfer */
966 /*coro->stack = 0;*/
967} 2041}
968 OUTPUT: 2042 OUTPUT:
969 RETVAL 2043 RETVAL
970 2044
2045bool
2046_destroy (SV *coro_sv)
2047 CODE:
2048 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2049 OUTPUT:
2050 RETVAL
2051
971void 2052void
972transfer(prev, next, flags)
973 SV *prev
974 SV *next
975 int flags
976 PROTOTYPE: @
977 CODE:
978 PUTBACK;
979 SV_CORO (next, "Coro::transfer");
980 SV_CORO (prev, "Coro::transfer");
981 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
982 SPAGAIN;
983
984void
985DESTROY(coro)
986 Coro::State coro
987 CODE:
988
989 if (coro->mainstack && coro->mainstack != main_mainstack)
990 {
991 struct coro temp;
992
993 PUTBACK;
994 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
995 LOAD (aTHX_ coro);
996 SPAGAIN;
997
998 destroy_stacks (aTHX);
999
1000 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1001 SPAGAIN;
1002
1003 coro->mainstack = 0;
1004 }
1005
1006 deallocate_stack (coro);
1007 SvREFCNT_dec (coro->args);
1008 Safefree (coro);
1009
1010void
1011_exit(code) 2053_exit (int code)
1012 int code
1013 PROTOTYPE: $ 2054 PROTOTYPE: $
1014 CODE: 2055 CODE:
1015 _exit (code); 2056 _exit (code);
1016 2057
1017MODULE = Coro::State PACKAGE = Coro::Cont 2058int
2059cctx_stacksize (int new_stacksize = 0)
2060 CODE:
2061 RETVAL = cctx_stacksize;
2062 if (new_stacksize)
2063 {
2064 cctx_stacksize = new_stacksize;
2065 ++cctx_gen;
2066 }
2067 OUTPUT:
2068 RETVAL
2069
2070int
2071cctx_max_idle (int max_idle = 0)
2072 CODE:
2073 RETVAL = cctx_max_idle;
2074 if (max_idle > 1)
2075 cctx_max_idle = max_idle;
2076 OUTPUT:
2077 RETVAL
2078
2079int
2080cctx_count ()
2081 CODE:
2082 RETVAL = cctx_count;
2083 OUTPUT:
2084 RETVAL
2085
2086int
2087cctx_idle ()
2088 CODE:
2089 RETVAL = cctx_idle;
2090 OUTPUT:
2091 RETVAL
1018 2092
1019void 2093void
1020yield(...) 2094list ()
2095 PPCODE:
2096{
2097 struct coro *coro;
2098 for (coro = coro_first; coro; coro = coro->next)
2099 if (coro->hv)
2100 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2101}
2102
2103void
2104call (Coro::State coro, SV *coderef)
2105 ALIAS:
2106 eval = 1
2107 CODE:
2108{
2109 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2110 {
2111 struct coro temp;
2112
2113 if (!(coro->flags & CF_RUNNING))
2114 {
2115 PUTBACK;
2116 save_perl (aTHX_ &temp);
2117 load_perl (aTHX_ coro);
2118 }
2119
2120 {
2121 dSP;
2122 ENTER;
2123 SAVETMPS;
2124 PUTBACK;
2125 PUSHSTACK;
2126 PUSHMARK (SP);
2127
2128 if (ix)
2129 eval_sv (coderef, 0);
2130 else
2131 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2132
2133 POPSTACK;
2134 SPAGAIN;
2135 FREETMPS;
2136 LEAVE;
2137 PUTBACK;
2138 }
2139
2140 if (!(coro->flags & CF_RUNNING))
2141 {
2142 save_perl (aTHX_ coro);
2143 load_perl (aTHX_ &temp);
2144 SPAGAIN;
2145 }
2146 }
2147}
2148
2149SV *
2150is_ready (Coro::State coro)
2151 PROTOTYPE: $
2152 ALIAS:
2153 is_ready = CF_READY
2154 is_running = CF_RUNNING
2155 is_new = CF_NEW
2156 is_destroyed = CF_DESTROYED
2157 CODE:
2158 RETVAL = boolSV (coro->flags & ix);
2159 OUTPUT:
2160 RETVAL
2161
2162void
2163throw (Coro::State self, SV *throw = &PL_sv_undef)
1021 PROTOTYPE: @ 2164 PROTOTYPE: $;$
1022 CODE: 2165 CODE:
1023 SV *yieldstack; 2166 SvREFCNT_dec (self->throw);
1024 SV *sv; 2167 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1025 AV *defav = GvAV (PL_defgv);
1026 struct coro *prev, *next;
1027 2168
1028 yieldstack = *hv_fetch ( 2169void
1029 (HV *)SvRV (GvSV (coro_current)), 2170api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1030 "yieldstack", sizeof ("yieldstack") - 1, 2171
2172SV *
2173has_cctx (Coro::State coro)
2174 PROTOTYPE: $
2175 CODE:
2176 RETVAL = boolSV (!!coro->cctx);
2177 OUTPUT:
2178 RETVAL
2179
2180int
2181is_traced (Coro::State coro)
2182 PROTOTYPE: $
2183 CODE:
2184 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2185 OUTPUT:
2186 RETVAL
2187
2188UV
2189rss (Coro::State coro)
2190 PROTOTYPE: $
2191 ALIAS:
2192 usecount = 1
2193 CODE:
2194 switch (ix)
2195 {
2196 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2197 case 1: RETVAL = coro->usecount; break;
1031 0 2198 }
2199 OUTPUT:
2200 RETVAL
2201
2202void
2203force_cctx ()
2204 CODE:
2205 struct coro *coro = SvSTATE (coro_current);
2206 coro->cctx->idle_sp = 0;
2207
2208void
2209swap_defsv (Coro::State self)
2210 PROTOTYPE: $
2211 ALIAS:
2212 swap_defav = 1
2213 CODE:
2214 if (!self->slot)
2215 croak ("cannot swap state with coroutine that has no saved state");
2216 else
1032 ); 2217 {
2218 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2219 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1033 2220
1034 /* set up @_ -- ugly */ 2221 SV *tmp = *src; *src = *dst; *dst = tmp;
1035 av_clear (defav); 2222 }
1036 av_fill (defav, items - 1);
1037 while (items--)
1038 av_store (defav, items, SvREFCNT_inc (ST(items)));
1039
1040 sv = av_pop ((AV *)SvRV (yieldstack));
1041 prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1042 next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1043 SvREFCNT_dec (sv);
1044
1045 coro_state_transfer (aTHX_ prev, next, 0);
1046 2223
1047MODULE = Coro::State PACKAGE = Coro 2224MODULE = Coro::State PACKAGE = Coro
1048 2225
1049BOOT: 2226BOOT:
1050{ 2227{
1051 int i; 2228 int i;
2229
2230 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2231 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2232 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2233
2234 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2235 SvREADONLY_on (coro_current);
2236
1052 HV *stash = gv_stashpv ("Coro", TRUE); 2237 coro_stash = gv_stashpv ("Coro", TRUE);
1053 2238
1054 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2239 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2240 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2241 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2242 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2243 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2244 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060
1061 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063 2245
1064 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2246 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065 coro_ready[i] = newAV (); 2247 coro_ready[i] = newAV ();
1066 2248
1067 { 2249 {
1068 SV *sv = perl_get_sv("Coro::API", 1); 2250 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1069 2251
1070 coroapi.schedule = api_schedule; 2252 coroapi.schedule = api_schedule;
1071 coroapi.cede = api_cede; 2253 coroapi.cede = api_cede;
2254 coroapi.cede_notself = api_cede_notself;
1072 coroapi.ready = api_ready; 2255 coroapi.ready = api_ready;
2256 coroapi.is_ready = api_is_ready;
1073 coroapi.nready = &coro_nready; 2257 coroapi.nready = &coro_nready;
1074 coroapi.current = coro_current; 2258 coroapi.current = coro_current;
1075 2259
1076 GCoroAPI = &coroapi; 2260 GCoroAPI = &coroapi;
1077 sv_setiv (sv, (IV)&coroapi); 2261 sv_setiv (sv, (IV)&coroapi);
1078 SvREADONLY_on (sv); 2262 SvREADONLY_on (sv);
1079 } 2263 }
1080} 2264}
1081 2265
1082#if !PERL_MICRO
1083
1084void 2266void
1085ready(self) 2267_set_current (SV *current)
1086 SV * self
1087 PROTOTYPE: $ 2268 PROTOTYPE: $
1088 CODE: 2269 CODE:
1089 api_ready (self); 2270 SvREFCNT_dec (SvRV (coro_current));
2271 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1090 2272
1091#endif 2273void
2274_set_readyhook (SV *hook)
2275 PROTOTYPE: $
2276 CODE:
2277 LOCK;
2278 SvREFCNT_dec (coro_readyhook);
2279 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2280 UNLOCK;
1092 2281
1093int 2282int
2283prio (Coro::State coro, int newprio = 0)
2284 ALIAS:
2285 nice = 1
2286 CODE:
2287{
2288 RETVAL = coro->prio;
2289
2290 if (items > 1)
2291 {
2292 if (ix)
2293 newprio = coro->prio - newprio;
2294
2295 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2296 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2297
2298 coro->prio = newprio;
2299 }
2300}
2301 OUTPUT:
2302 RETVAL
2303
2304SV *
2305ready (SV *self)
2306 PROTOTYPE: $
2307 CODE:
2308 RETVAL = boolSV (api_ready (self));
2309 OUTPUT:
2310 RETVAL
2311
2312int
1094nready(...) 2313nready (...)
1095 PROTOTYPE: 2314 PROTOTYPE:
1096 CODE: 2315 CODE:
1097 RETVAL = coro_nready; 2316 RETVAL = coro_nready;
1098 OUTPUT: 2317 OUTPUT:
1099 RETVAL 2318 RETVAL
1100 2319
2320# for async_pool speedup
1101void 2321void
1102schedule(...) 2322_pool_1 (SV *cb)
1103 PROTOTYPE:
1104 CODE: 2323 CODE:
1105 api_schedule (); 2324{
2325 struct coro *coro = SvSTATE (coro_current);
2326 HV *hv = (HV *)SvRV (coro_current);
2327 AV *defav = GvAV (PL_defgv);
2328 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2329 AV *invoke_av;
2330 int i, len;
2331
2332 if (!invoke)
2333 {
2334 SV *old = PL_diehook;
2335 PL_diehook = 0;
2336 SvREFCNT_dec (old);
2337 croak ("\3async_pool terminate\2\n");
2338 }
2339
2340 SvREFCNT_dec (coro->saved_deffh);
2341 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2342
2343 hv_store (hv, "desc", sizeof ("desc") - 1,
2344 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2345
2346 invoke_av = (AV *)SvRV (invoke);
2347 len = av_len (invoke_av);
2348
2349 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2350
2351 if (len > 0)
2352 {
2353 av_fill (defav, len - 1);
2354 for (i = 0; i < len; ++i)
2355 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2356 }
2357
2358 SvREFCNT_dec (invoke);
2359}
1106 2360
1107void 2361void
1108cede(...) 2362_pool_2 (SV *cb)
1109 PROTOTYPE:
1110 CODE: 2363 CODE:
1111 api_cede (); 2364{
2365 struct coro *coro = SvSTATE (coro_current);
1112 2366
1113# and these are hacks 2367 sv_setsv (cb, &PL_sv_undef);
2368
2369 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2370 coro->saved_deffh = 0;
2371
2372 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2373 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2374 {
2375 SV *old = PL_diehook;
2376 PL_diehook = 0;
2377 SvREFCNT_dec (old);
2378 croak ("\3async_pool terminate\2\n");
2379 }
2380
2381 av_clear (GvAV (PL_defgv));
2382 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2383 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2384
2385 coro->prio = 0;
2386
2387 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2388 api_trace (coro_current, 0);
2389
2390 av_push (av_async_pool, newSVsv (coro_current));
2391}
2392
2393#if 0
2394
2395void
2396_generator_call (...)
2397 PROTOTYPE: @
2398 PPCODE:
2399 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2400 xxxx
2401 abort ();
2402
1114SV * 2403SV *
1115_aio_get_state () 2404gensub (SV *sub, ...)
1116 CODE: 2405 PROTOTYPE: &;@
2406 CODE:
1117{ 2407{
1118 struct { 2408 struct coro *coro;
1119 int errorno; 2409 MAGIC *mg;
1120 int laststype; 2410 CV *xcv;
1121 int laststatval; 2411 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1122 Stat_t statcache; 2412 int i;
1123 } data;
1124 2413
1125 data.errorno = errno; 2414 CvGV (ncv) = CvGV (cv);
1126 data.laststype = PL_laststype; 2415 CvFILE (ncv) = CvFILE (cv);
1127 data.laststatval = PL_laststatval;
1128 data.statcache = PL_statcache;
1129 2416
1130 RETVAL = newSVpvn ((char *)&data, sizeof data); 2417 Newz (0, coro, 1, struct coro);
2418 coro->args = newAV ();
2419 coro->flags = CF_NEW;
2420
2421 av_extend (coro->args, items - 1);
2422 for (i = 1; i < items; i++)
2423 av_push (coro->args, newSVsv (ST (i)));
2424
2425 CvISXSUB_on (ncv);
2426 CvXSUBANY (ncv).any_ptr = (void *)coro;
2427
2428 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2429
2430 CvXSUB (ncv) = CvXSUB (xcv);
2431 CvANON_on (ncv);
2432
2433 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2434 RETVAL = newRV_noinc ((SV *)ncv);
1131} 2435}
1132 OUTPUT: 2436 OUTPUT:
1133 RETVAL 2437 RETVAL
1134 2438
2439#endif
2440
2441
2442MODULE = Coro::State PACKAGE = Coro::AIO
2443
1135void 2444void
1136_aio_set_state (char *data_) 2445_get_state (SV *self)
2446 PPCODE:
2447{
2448 AV *defav = GvAV (PL_defgv);
2449 AV *av = newAV ();
2450 int i;
2451 SV *data_sv = newSV (sizeof (struct io_state));
2452 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2453 SvCUR_set (data_sv, sizeof (struct io_state));
2454 SvPOK_only (data_sv);
2455
2456 data->errorno = errno;
2457 data->laststype = PL_laststype;
2458 data->laststatval = PL_laststatval;
2459 data->statcache = PL_statcache;
2460
2461 av_extend (av, AvFILLp (defav) + 1 + 1);
2462
2463 for (i = 0; i <= AvFILLp (defav); ++i)
2464 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2465
2466 av_push (av, data_sv);
2467
2468 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2469
2470 api_ready (self);
2471}
2472
2473void
2474_set_state (SV *state)
1137 PROTOTYPE: $ 2475 PROTOTYPE: $
2476 PPCODE:
2477{
2478 AV *av = (AV *)SvRV (state);
2479 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2480 int i;
2481
2482 errno = data->errorno;
2483 PL_laststype = data->laststype;
2484 PL_laststatval = data->laststatval;
2485 PL_statcache = data->statcache;
2486
2487 EXTEND (SP, AvFILLp (av));
2488 for (i = 0; i < AvFILLp (av); ++i)
2489 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2490}
2491
2492
2493MODULE = Coro::State PACKAGE = Coro::AnyEvent
2494
2495BOOT:
2496 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2497
2498SV *
2499_schedule (...)
2500 PROTOTYPE: @
1138 CODE: 2501 CODE:
1139{ 2502{
1140 struct { 2503 static int incede;
1141 int errorno;
1142 int laststype;
1143 int laststatval;
1144 Stat_t statcache;
1145 } *data = (void *)data_;
1146 2504
1147 errno = data->errorno; 2505 api_cede_notself ();
1148 PL_laststype = data->laststype; 2506
1149 PL_laststatval = data->laststatval; 2507 ++incede;
1150 PL_statcache = data->statcache; 2508 while (coro_nready >= incede && api_cede ())
2509 ;
2510
2511 sv_setsv (sv_activity, &PL_sv_undef);
2512 if (coro_nready >= incede)
2513 {
2514 PUSHMARK (SP);
2515 PUTBACK;
2516 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2517 SPAGAIN;
2518 }
2519
2520 --incede;
1151} 2521}
2522
2523
2524MODULE = Coro::State PACKAGE = PerlIO::cede
2525
2526BOOT:
2527 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2528

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