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Comparing Coro/Coro/State.xs (file contents):
Revision 1.97 by root, Sun Nov 26 21:21:14 2006 UTC vs.
Revision 1.264 by root, Fri Nov 14 02:29:09 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 <stdio.h> 83/* 5.11 */
33#include <errno.h> 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
34 105
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD 107# undef CORO_STACKGUARD
37#endif 108#endif
38 109
39#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
40# define STACKGUARD 0 111# define CORO_STACKGUARD 0
41#endif
42
43#ifdef HAVE_MMAP
44# include <unistd.h>
45# include <sys/mman.h>
46# ifndef MAP_ANONYMOUS
47# ifdef MAP_ANON
48# define MAP_ANONYMOUS MAP_ANON
49# else
50# undef HAVE_MMAP
51# 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;
52# endif 150# endif
53# include <limits.h>
54# ifndef PAGESIZE
55# define PAGESIZE pagesize
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize;
58# else
59# define BOOT_PAGESIZE
60# endif
61#endif
62 151
63/* The next macro should declare a variable stacklevel that contains and approximation
64 * to the current C stack pointer. Its property is that it changes with each call
65 * and should be unique. */
66#define dSTACKLEVEL int stacklevel
67#define STACKLEVEL ((void *)&stacklevel)
68
69#define IN_DESTRUCT (PL_main_cv == Nullcv)
70
71#include "CoroAPI.h"
72
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74
75#ifdef USE_ITHREADS
76static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else 152#else
153
80# define LOCK (void)0 154# define LOCK (void)0
81# define UNLOCK (void)0 155# define UNLOCK (void)0
82#endif
83 156
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;
84static struct CoroAPI coroapi; 178static struct CoroAPI coroapi;
85static 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;
86static HV *coro_state_stash, *coro_stash; 181static HV *coro_state_stash, *coro_stash;
87static 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;
184
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};
88 215
89/* this is a structure representing a c-level coroutine */ 216/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 217typedef struct coro_cctx {
91 struct coro_stack *next; 218 struct coro_cctx *next;
92 219
93 /* the stack */ 220 /* the stack */
94 void *sptr; 221 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 222 size_t ssize;
96 223
97 /* cpu state */ 224 /* cpu state */
98 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 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 */
99 JMPENV *top_env; 227 JMPENV *top_env;
100 coro_context cctx; 228 coro_context cctx;
101} coro_stack; 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 */
245typedef struct {
246 SV *defsv;
247 AV *defav;
248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
102 256
103/* this is a structure representing a perl-level coroutine */ 257/* this is a structure representing a perl-level coroutine */
104struct coro { 258struct coro {
105 /* the c coroutine allocated to this perl coroutine, if any */ 259 /* the c coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 260 coro_cctx *cctx;
107 261
108 /* data associated with this coroutine (initial args) */ 262 /* process data */
109 AV *args;
110 int refcnt;
111
112 /* optionally saved, might be zero */
113 AV *defav;
114 SV *defsv;
115 SV *errsv;
116
117 /* saved global state not related to stacks */
118 U8 dowarn;
119 I32 in_eval;
120
121 /* the stacks and related info (callchain etc..) */
122 PERL_SI *curstackinfo;
123 AV *curstack;
124 AV *mainstack; 263 AV *mainstack;
125 SV **stack_sp; 264 perl_slots *slot; /* basically the saved sp */
126 OP *op; 265
127 SV **curpad; 266 AV *args; /* data associated with this coroutine (initial args) */
128 AV *comppad; 267 int refcnt; /* coroutines are refcounted, yes */
129 CV *compcv; 268 int flags; /* CF_ flags */
130 SV **stack_base; 269 HV *hv; /* the perl hash associated with this coro, if any */
131 SV **stack_max; 270
132 SV **tmps_stack; 271 /* statistics */
133 I32 tmps_floor; 272 int usecount; /* number of transfers to this coro */
134 I32 tmps_ix;
135 I32 tmps_max;
136 I32 *markstack;
137 I32 *markstack_ptr;
138 I32 *markstack_max;
139 I32 *scopestack;
140 I32 scopestack_ix;
141 I32 scopestack_max;
142 ANY *savestack;
143 I32 savestack_ix;
144 I32 savestack_max;
145 OP **retstack;
146 I32 retstack_ix;
147 I32 retstack_max;
148 PMOP *curpm;
149 COP *curcop;
150 273
151 /* coro process data */ 274 /* coro process data */
152 int prio; 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;
153}; 283};
154 284
155typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
157 287
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
158static AV * 336static AV *
159coro_clone_padlist (pTHX_ CV *cv) 337coro_clone_padlist (pTHX_ CV *cv)
160{ 338{
161 AV *padlist = CvPADLIST (cv); 339 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 340 AV *newpadlist, *newpad;
163 341
164 newpadlist = newAV (); 342 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 343 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 344#if PERL_VERSION_ATLEAST (5,10,0)
345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
346#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 348#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 349 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 350 --AvFILLp (padlist);
173 351
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 352 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad); 353 av_store (newpadlist, 1, (SV *)newpad);
176 354
177 return newpadlist; 355 return newpadlist;
178} 356}
179 357
… …
209 387
210 /* casting is fun. */ 388 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 389 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 390 free_padlist (aTHX_ padlist);
213 391
214 SvREFCNT_dec (av); 392 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 393
216 return 0; 394 return 0;
217} 395}
218 396
219#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
220 399
221static 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))
222 440
223/* the next two functions merely cache the padlists */ 441/* the next two functions merely cache the padlists */
224static void 442static void
225get_padlist (pTHX_ CV *cv) 443get_padlist (pTHX_ CV *cv)
226{ 444{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 445 MAGIC *mg = CORO_MAGIC_cv (cv);
446 AV *av;
228 447
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 448 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 449 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 450 else
232 { 451 {
233#if 0 452#if CORO_PREFER_PERL_FUNCTIONS
234 /* this is probably cleaner, but also slower? */ 453 /* this is probably cleaner? but also slower! */
454 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 455 CV *cp = Perl_cv_clone (cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 456 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 457 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 458 SvREFCNT_dec (cp);
239#else 459#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 460 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
243} 463}
244 464
245static void 465static void
246put_padlist (pTHX_ CV *cv) 466put_padlist (pTHX_ CV *cv)
247{ 467{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 468 MAGIC *mg = CORO_MAGIC_cv (cv);
469 AV *av;
249 470
250 if (!mg) 471 if (expect_false (!mg))
251 { 472 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254 mg->mg_virtual = &vtbl_coro;
255 mg->mg_obj = (SV *)newAV ();
256 }
257 473
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 474 av = (AV *)mg->mg_obj;
259}
260 475
261#define SB do { 476 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 477 av_extend (av, AvMAX (av) + 1);
263 478
264#define LOAD(state) load_state(aTHX_ (state)); 479 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 480}
266 481
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 482/** load & save, init *******************************************************/
268 483
269static void 484static void
270load_state(pTHX_ Coro__State c) 485load_perl (pTHX_ Coro__State c)
271{ 486{
272 PL_dowarn = c->dowarn; 487 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 488 c->slot = 0;
274 489
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 490 PL_mainstack = c->mainstack;
278 PL_stack_sp = c->stack_sp;
279 PL_op = c->op;
280 PL_curpad = c->curpad;
281 PL_comppad = c->comppad;
282 PL_compcv = c->compcv;
283 PL_stack_base = c->stack_base;
284 PL_stack_max = c->stack_max;
285 PL_tmps_stack = c->tmps_stack;
286 PL_tmps_floor = c->tmps_floor;
287 PL_tmps_ix = c->tmps_ix;
288 PL_tmps_max = c->tmps_max;
289 PL_markstack = c->markstack;
290 PL_markstack_ptr = c->markstack_ptr;
291 PL_markstack_max = c->markstack_max;
292 PL_scopestack = c->scopestack;
293 PL_scopestack_ix = c->scopestack_ix;
294 PL_scopestack_max = c->scopestack_max;
295 PL_savestack = c->savestack;
296 PL_savestack_ix = c->savestack_ix;
297 PL_savestack_max = c->savestack_max;
298#if PERL_VERSION < 9
299 PL_retstack = c->retstack;
300 PL_retstack_ix = c->retstack_ix;
301 PL_retstack_max = c->retstack_max;
302#endif
303 PL_curpm = c->curpm;
304 PL_curcop = c->curcop;
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} 594}
433 595
434/* 596/*
435 * allocate various perl stacks. This is an exact copy 597 * allocate various perl stacks. This is an exact copy
436 * of perl.c:init_stacks, except that it uses less memory 598 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do 599 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace. 600 * not usually need a lot of stackspace.
439 */ 601 */
602#if CORO_PREFER_PERL_FUNCTIONS
603# define coro_init_stacks init_stacks
604#else
440static void 605static void
441coro_init_stacks (pTHX) 606coro_init_stacks (pTHX)
442{ 607{
443 LOCK; 608 PL_curstackinfo = new_stackinfo(32, 8);
444
445 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446 PL_curstackinfo->si_type = PERLSI_MAIN; 609 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 610 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 611 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 612
450 PL_stack_base = AvARRAY(PL_curstack); 613 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 614 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 615 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 616
454 New(50,PL_tmps_stack,96,SV*); 617 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 618 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 619 PL_tmps_ix = -1;
457 PL_tmps_max = 96; 620 PL_tmps_max = 32;
458 621
459 New(54,PL_markstack,16,I32); 622 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 623 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16; 624 PL_markstack_max = PL_markstack + 16;
462 625
463#ifdef SET_MARK_OFFSET 626#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 627 SET_MARK_OFFSET;
465#endif 628#endif
466 629
467 New(54,PL_scopestack,16,I32); 630 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 631 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16; 632 PL_scopestack_max = 8;
470 633
471 New(54,PL_savestack,96,ANY); 634 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 635 PL_savestack_ix = 0;
473 PL_savestack_max = 96; 636 PL_savestack_max = 24;
474 637
475#if PERL_VERSION < 9 638#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,8,OP*); 639 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 640 PL_retstack_ix = 0;
478 PL_retstack_max = 8; 641 PL_retstack_max = 4;
479#endif 642#endif
480
481 UNLOCK;
482} 643}
644#endif
483 645
484/* 646/*
485 * destroy the stacks, the callchain etc... 647 * destroy the stacks, the callchain etc...
486 */ 648 */
487static void 649static void
488destroy_stacks(pTHX) 650coro_destruct_stacks (pTHX)
489{ 651{
490 if (!IN_DESTRUCT)
491 {
492 /* is this ugly, I ask? */
493 LEAVE_SCOPE (0);
494
495 /* sure it is, but more important: is it correct?? :/ */
496 FREETMPS;
497
498 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499 }
500
501 while (PL_curstackinfo->si_next) 652 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 653 PL_curstackinfo = PL_curstackinfo->si_next;
503 654
504 while (PL_curstackinfo) 655 while (PL_curstackinfo)
505 { 656 {
506 PERL_SI *p = PL_curstackinfo->si_prev; 657 PERL_SI *p = PL_curstackinfo->si_prev;
507 658
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT) 659 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack); 660 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519 661
520 Safefree (PL_curstackinfo->si_cxstack); 662 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo); 663 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p; 664 PL_curstackinfo = p;
523 } 665 }
524 666
525 Safefree (PL_tmps_stack); 667 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 668 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 669 Safefree (PL_scopestack);
528 Safefree (PL_savestack); 670 Safefree (PL_savestack);
529#if PERL_VERSION < 9 671#if !PERL_VERSION_ATLEAST (5,10,0)
530 Safefree (PL_retstack); 672 Safefree (PL_retstack);
531#endif 673#endif
532} 674}
533 675
676static size_t
677coro_rss (pTHX_ struct coro *coro)
678{
679 size_t rss = sizeof (*coro);
680
681 if (coro->mainstack)
682 {
683 perl_slots tmp_slot;
684 perl_slots *slot;
685
686 if (coro->flags & CF_RUNNING)
687 {
688 slot = &tmp_slot;
689
690 #define VAR(name,type) slot->name = PL_ ## name;
691 # include "state.h"
692 #undef VAR
693 }
694 else
695 slot = coro->slot;
696
697 if (slot)
698 {
699 rss += sizeof (slot->curstackinfo);
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
710 }
711 }
712
713 return rss;
714}
715
716/** coroutine stack handling ************************************************/
717
718static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
719static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
720static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
721
722/* apparently < 5.8.8 */
723#ifndef MgPV_nolen_const
724#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
725 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
726 (const char*)(mg)->mg_ptr)
727#endif
728
729/* we sometimes need to create the effect of entersub calling us */
730#define SSL_HEAD (void)0
731/* we somtimes need to create the effect of leaving via entersub */
732#define SSL_TAIL (void)0
733
734/*
735 * This overrides the default magic get method of %SIG elements.
736 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737 * and instead of tryign to save and restore the hash elements, we just provide
738 * readback here.
739 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
740 * not expecting this to actually change the hook. This is a potential problem
741 * when a schedule happens then, but we ignore this.
742 */
743static int
744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
758 return 0;
759 }
760 }
761
762 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
763}
764
765static int
766coro_sigelem_clr (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 *old = *svp;
780 *svp = 0;
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
787}
788
789static int
790coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = newSVsv (sv);
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
811}
812
534static void 813static void
535setup_coro (struct coro *coro) 814coro_setup (pTHX_ struct coro *coro)
536{ 815{
537 /* 816 /*
538 * emulate part of the perl startup here. 817 * emulate part of the perl startup here.
539 */ 818 */
540 dTHX; 819 coro_init_stacks (aTHX);
820
821 PL_runops = RUNOPS_DEFAULT;
822 PL_curcop = &PL_compiling;
823 PL_in_eval = EVAL_NULL;
824 PL_comppad = 0;
825 PL_curpm = 0;
826 PL_curpad = 0;
827 PL_localizing = 0;
828 PL_dirty = 0;
829 PL_restartop = 0;
830#if PERL_VERSION_ATLEAST (5,10,0)
831 PL_parser = 0;
832#endif
833
834 /* recreate the die/warn hooks */
835 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
836 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
837
838 GvSV (PL_defgv) = newSV (0);
839 GvAV (PL_defgv) = coro->args; coro->args = 0;
840 GvSV (PL_errgv) = newSV (0);
841 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
842 PL_rs = newSVsv (GvSV (irsgv));
843 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
844
845 {
846 dSP;
847 UNOP myop;
848
849 Zero (&myop, 1, UNOP);
850 myop.op_next = Nullop;
851 myop.op_flags = OPf_WANT_VOID;
852
853 PUSHMARK (SP);
854 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
855 PUTBACK;
856 PL_op = (OP *)&myop;
857 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
858 SPAGAIN;
859 }
860
861 /* this newly created coroutine might be run on an existing cctx which most
862 * likely was suspended in set_stacklevel, called from entersub.
863 * set_stacklevel doesn't do anything on return, but entersub does LEAVE,
864 * so we ENTER here for symmetry.
865 */
866 SSL_HEAD;
867}
868
869static void
870coro_destruct (pTHX_ struct coro *coro)
871{
872 if (!IN_DESTRUCT)
873 {
874 /* restore all saved variables and stuff */
875 LEAVE_SCOPE (0);
876 assert (PL_tmps_floor == -1);
877
878 /* free all temporaries */
879 FREETMPS;
880 assert (PL_tmps_ix == -1);
881
882 /* unwind all extra stacks */
883 POPSTACK_TO (PL_mainstack);
884
885 /* unwind main stack */
886 dounwind (-1);
887 }
888
889 SvREFCNT_dec (GvSV (PL_defgv));
890 SvREFCNT_dec (GvAV (PL_defgv));
891 SvREFCNT_dec (GvSV (PL_errgv));
892 SvREFCNT_dec (PL_defoutgv);
893 SvREFCNT_dec (PL_rs);
894 SvREFCNT_dec (GvSV (irsgv));
895
896 SvREFCNT_dec (PL_diehook);
897 SvREFCNT_dec (PL_warnhook);
898
899 SvREFCNT_dec (coro->saved_deffh);
900 SvREFCNT_dec (coro->throw);
901
902 coro_destruct_stacks (aTHX);
903}
904
905INLINE void
906free_coro_mortal (pTHX)
907{
908 if (expect_true (coro_mortal))
909 {
910 SvREFCNT_dec (coro_mortal);
911 coro_mortal = 0;
912 }
913}
914
915static int
916runops_trace (pTHX)
917{
918 COP *oldcop = 0;
919 int oldcxix = -2;
920 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
921 coro_cctx *cctx = coro->cctx;
922
923 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
924 {
925 PERL_ASYNC_CHECK ();
926
927 if (cctx->flags & CC_TRACE_ALL)
928 {
929 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
930 {
931 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
932 SV **bot, **top;
933 AV *av = newAV (); /* return values */
934 SV **cb;
935 dSP;
936
937 GV *gv = CvGV (cx->blk_sub.cv);
938 SV *fullname = sv_2mortal (newSV (0));
939 if (isGV (gv))
940 gv_efullname3 (fullname, gv, 0);
941
942 bot = PL_stack_base + cx->blk_oldsp + 1;
943 top = cx->blk_gimme == G_ARRAY ? SP + 1
944 : cx->blk_gimme == G_SCALAR ? bot + 1
945 : bot;
946
947 av_extend (av, top - bot);
948 while (bot < top)
949 av_push (av, SvREFCNT_inc_NN (*bot++));
950
951 PL_runops = RUNOPS_DEFAULT;
952 ENTER;
953 SAVETMPS;
954 EXTEND (SP, 3);
955 PUSHMARK (SP);
956 PUSHs (&PL_sv_no);
957 PUSHs (fullname);
958 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
959 PUTBACK;
960 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
961 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
962 SPAGAIN;
963 FREETMPS;
964 LEAVE;
965 PL_runops = runops_trace;
966 }
967
968 if (oldcop != PL_curcop)
969 {
970 oldcop = PL_curcop;
971
972 if (PL_curcop != &PL_compiling)
973 {
974 SV **cb;
975
976 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
977 {
978 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
979
980 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
981 {
982 runops_proc_t old_runops = PL_runops;
983 dSP;
984 GV *gv = CvGV (cx->blk_sub.cv);
985 SV *fullname = sv_2mortal (newSV (0));
986
987 if (isGV (gv))
988 gv_efullname3 (fullname, gv, 0);
989
990 PL_runops = RUNOPS_DEFAULT;
991 ENTER;
992 SAVETMPS;
993 EXTEND (SP, 3);
994 PUSHMARK (SP);
995 PUSHs (&PL_sv_yes);
996 PUSHs (fullname);
997 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
998 PUTBACK;
999 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1000 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1001 SPAGAIN;
1002 FREETMPS;
1003 LEAVE;
1004 PL_runops = runops_trace;
1005 }
1006
1007 oldcxix = cxstack_ix;
1008 }
1009
1010 if (cctx->flags & CC_TRACE_LINE)
1011 {
1012 dSP;
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PL_runops = RUNOPS_DEFAULT;
1019 PUSHMARK (SP);
1020 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1021 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030 }
1031 }
1032 }
1033 }
1034
1035 TAINT_NOT;
1036 return 0;
1037}
1038
1039static void
1040prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1041{
1042 ta->prev = (struct coro *)cctx;
1043 ta->next = 0;
1044}
1045
1046/* inject a fake call to Coro::State::_cctx_init into the execution */
1047/* _cctx_init should be careful, as it could be called at almost any time */
1048/* during execution of a perl program */
1049/* also initialises PL_top_env */
1050static void NOINLINE
1051cctx_prepare (pTHX_ coro_cctx *cctx)
1052{
541 dSP; 1053 dSP;
542 UNOP myop; 1054 UNOP myop;
543 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544 1055
545 coro_init_stacks (aTHX); 1056 PL_top_env = &PL_start_env;
546 /*PL_curcop = 0;*/
547 /*PL_in_eval = PL_in_eval;*/ /* inherit */
548 SvREFCNT_dec (GvAV (PL_defgv));
549 GvAV (PL_defgv) = coro->args; coro->args = 0;
550 1057
551 SPAGAIN; 1058 if (cctx->flags & CC_TRACE)
1059 PL_runops = runops_trace;
552 1060
553 Zero (&myop, 1, UNOP); 1061 Zero (&myop, 1, UNOP);
554 myop.op_next = Nullop; 1062 myop.op_next = PL_op;
555 myop.op_flags = OPf_WANT_VOID; 1063 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556 1064
1065 PUSHMARK (SP);
1066 EXTEND (SP, 2);
1067 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1068 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1069 PUTBACK;
557 PL_op = (OP *)&myop; 1070 PL_op = (OP *)&myop;
558
559 PUSHMARK(SP);
560 XPUSHs (sub_init);
561 PUTBACK;
562 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1071 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563 SPAGAIN; 1072 SPAGAIN;
564
565 ENTER; /* necessary e.g. for dounwind */
566} 1073}
567 1074
1075/* the tail of transfer: execute stuff we can only do after a transfer */
1076INLINE void
1077transfer_tail (pTHX)
1078{
1079 struct coro *next = (struct coro *)transfer_next;
1080 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1081 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1082
1083 free_coro_mortal (aTHX);
1084 UNLOCK;
1085
1086 if (expect_false (next->throw))
1087 {
1088 SV *exception = sv_2mortal (next->throw);
1089
1090 next->throw = 0;
1091 sv_setsv (ERRSV, exception);
1092 croak (0);
1093 }
1094}
1095
1096/*
1097 * this is a _very_ stripped down perl interpreter ;)
1098 */
568static void 1099static void
569free_coro_mortal () 1100cctx_run (void *arg)
570{ 1101{
571 if (coro_mortal) 1102#ifdef USE_ITHREADS
1103# if CORO_PTHREAD
1104 PERL_SET_CONTEXT (coro_thx);
1105# endif
1106#endif
572 { 1107 {
573 dTHX; 1108 dTHX;
574 1109
575 SvREFCNT_dec (coro_mortal); 1110 /* entersub called ENTER, but we never 'returned', undo that here */
576 coro_mortal = 0; 1111 SSL_TAIL;
1112
1113 /* we now skip the op that did lead to transfer() */
1114 PL_op = PL_op->op_next;
1115
1116 /* inject a fake subroutine call to cctx_init */
1117 cctx_prepare (aTHX_ (coro_cctx *)arg);
1118
1119 /* cctx_run is the alternative tail of transfer() */
1120 transfer_tail (aTHX);
1121
1122 /* somebody or something will hit me for both perl_run and PL_restartop */
1123 PL_restartop = PL_op;
1124 perl_run (PL_curinterp);
1125
1126 /*
1127 * If perl-run returns we assume exit() was being called or the coro
1128 * fell off the end, which seems to be the only valid (non-bug)
1129 * reason for perl_run to return. We try to exit by jumping to the
1130 * bootstrap-time "top" top_env, as we cannot restore the "main"
1131 * coroutine as Coro has no such concept
1132 */
1133 PL_top_env = main_top_env;
1134 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1135 }
1136}
1137
1138static coro_cctx *
1139cctx_new ()
1140{
1141 coro_cctx *cctx;
1142
1143 ++cctx_count;
1144 New (0, cctx, 1, coro_cctx);
1145
1146 cctx->gen = cctx_gen;
1147 cctx->flags = 0;
1148 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1149
1150 return cctx;
1151}
1152
1153/* create a new cctx only suitable as source */
1154static coro_cctx *
1155cctx_new_empty ()
1156{
1157 coro_cctx *cctx = cctx_new ();
1158
1159 cctx->sptr = 0;
1160 coro_create (&cctx->cctx, 0, 0, 0, 0);
1161
1162 return cctx;
1163}
1164
1165/* create a new cctx suitable as destination/running a perl interpreter */
1166static coro_cctx *
1167cctx_new_run ()
1168{
1169 coro_cctx *cctx = cctx_new ();
1170 void *stack_start;
1171 size_t stack_size;
1172
1173#if HAVE_MMAP
1174 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1175 /* mmap supposedly does allocate-on-write for us */
1176 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1177
1178 if (cctx->sptr != (void *)-1)
577 } 1179 {
1180 #if CORO_STACKGUARD
1181 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1182 #endif
1183 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1184 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1185 cctx->flags |= CC_MAPPED;
1186 }
1187 else
1188#endif
1189 {
1190 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1191 New (0, cctx->sptr, cctx_stacksize, long);
1192
1193 if (!cctx->sptr)
1194 {
1195 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1196 _exit (EXIT_FAILURE);
1197 }
1198
1199 stack_start = cctx->sptr;
1200 stack_size = cctx->ssize;
1201 }
1202
1203 #if CORO_USE_VALGRIND
1204 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1205 #endif
1206
1207 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1208
1209 return cctx;
578} 1210}
579 1211
580static void 1212static void
581coro_run (void *arg) 1213cctx_destroy (coro_cctx *cctx)
582{ 1214{
583 /* 1215 if (!cctx)
584 * this is a _very_ stripped down perl interpreter ;) 1216 return;
585 */
586 dTHX;
587 int ret;
588 1217
589 UNLOCK; 1218 --cctx_count;
1219 coro_destroy (&cctx->cctx);
590 1220
591 PL_top_env = &PL_start_env; 1221 /* coro_transfer creates new, empty cctx's */
592 1222 if (cctx->sptr)
593 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1223 {
594 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op)); 1224 #if CORO_USE_VALGRIND
595 1225 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
596 /* continue at cctx_init, without entersub */ 1226 #endif
597 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
598
599 /* somebody will hit me for both perl_run and PL_restartop */
600 ret = perl_run (aTHX_ PERL_GET_CONTEXT);
601 printf ("ret %d\n", ret);//D
602
603 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
604 abort ();
605}
606
607static coro_stack *
608stack_new ()
609{
610 coro_stack *stack;
611
612 New (0, stack, 1, coro_stack);
613 1227
614#if HAVE_MMAP 1228#if HAVE_MMAP
615 1229 if (cctx->flags & CC_MAPPED)
616 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1230 munmap (cctx->sptr, cctx->ssize);
617 /* mmap suppsedly does allocate-on-write for us */ 1231 else
618 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
619
620 if (stack->sptr == (void *)-1)
621 {
622 perror ("FATAL: unable to mmap stack for coroutine");
623 _exit (EXIT_FAILURE);
624 }
625
626# if STACKGUARD
627 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
628# endif 1232#endif
629 1233 Safefree (cctx->sptr);
630#else
631
632 stack->ssize = STACKSIZE * (long)sizeof (long);
633 New (0, stack->sptr, STACKSIZE, long);
634
635 if (!stack->sptr)
636 { 1234 }
637 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1235
638 _exit (EXIT_FAILURE); 1236 Safefree (cctx);
1237}
1238
1239/* wether this cctx should be destructed */
1240#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1241
1242static coro_cctx *
1243cctx_get (pTHX)
1244{
1245 while (expect_true (cctx_first))
639 } 1246 {
1247 coro_cctx *cctx = cctx_first;
1248 cctx_first = cctx->next;
1249 --cctx_idle;
640 1250
641#endif 1251 if (expect_true (!CCTX_EXPIRED (cctx)))
1252 return cctx;
642 1253
643 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1254 cctx_destroy (cctx);
1255 }
644 1256
645 return stack; 1257 return cctx_new_run ();
646} 1258}
647 1259
648static void 1260static void
649stack_free (coro_stack *stack) 1261cctx_put (coro_cctx *cctx)
650{ 1262{
651 if (!stack) 1263 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
652 return;
653 1264
654#if HAVE_MMAP 1265 /* free another cctx if overlimit */
655 munmap (stack->sptr, stack->ssize); 1266 if (expect_false (cctx_idle >= cctx_max_idle))
656#else
657 Safefree (stack->sptr);
658#endif
659
660 Safefree (stack);
661}
662
663static coro_stack *stack_first;
664
665static coro_stack *
666stack_get ()
667{
668 coro_stack *stack;
669
670 if (stack_first)
671 {
672 stack = stack_first;
673 stack_first = stack->next;
674 }
675 else
676 { 1267 {
677 stack = stack_new (); 1268 coro_cctx *first = cctx_first;
678 PL_op = PL_op->op_next; 1269 cctx_first = first->next;
1270 --cctx_idle;
1271
1272 cctx_destroy (first);
679 } 1273 }
680 1274
681 return stack; 1275 ++cctx_idle;
1276 cctx->next = cctx_first;
1277 cctx_first = cctx;
682} 1278}
1279
1280/** coroutine switching *****************************************************/
683 1281
684static void 1282static void
685stack_put (coro_stack *stack) 1283transfer_check (pTHX_ struct coro *prev, struct coro *next)
686{ 1284{
687 stack->next = stack_first; 1285 if (expect_true (prev != next))
688 stack_first = stack; 1286 {
689} 1287 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1288 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
690 1289
691/* never call directly, always through the coro_state_transfer global variable */ 1290 if (expect_false (next->flags & CF_RUNNING))
692static void 1291 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1292
1293 if (expect_false (next->flags & CF_DESTROYED))
1294 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1295
1296#if !PERL_VERSION_ATLEAST (5,10,0)
1297 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1298 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1299#endif
1300 }
1301}
1302
1303/* always use the TRANSFER macro */
1304static void NOINLINE
693transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1305transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
694{ 1306{
695 dSTACKLEVEL; 1307 dSTACKLEVEL;
696 1308
697 /* sometimes transfer is only called to set idle_sp */ 1309 /* sometimes transfer is only called to set idle_sp */
698 if (flags == TRANSFER_SET_STACKLEVEL) 1310 if (expect_false (!next))
1311 {
699 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1312 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
700 else if (prev != next) 1313 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
701 { 1314 }
1315 else if (expect_true (prev != next))
1316 {
702 coro_stack *prev__stack; 1317 coro_cctx *prev__cctx;
1318
1319 if (expect_false (prev->flags & CF_NEW))
1320 {
1321 /* create a new empty/source context */
1322 prev->cctx = cctx_new_empty ();
1323 prev->flags &= ~CF_NEW;
1324 prev->flags |= CF_RUNNING;
1325 }
1326
1327 prev->flags &= ~CF_RUNNING;
1328 next->flags |= CF_RUNNING;
703 1329
704 LOCK; 1330 LOCK;
705 1331
706 if (next->mainstack) 1332 /* first get rid of the old state */
1333 save_perl (aTHX_ prev);
1334
1335 if (expect_false (next->flags & CF_NEW))
707 { 1336 {
708 /* coroutine already started */ 1337 /* need to start coroutine */
709 SAVE (prev, flags); 1338 next->flags &= ~CF_NEW;
710 LOAD (next); 1339 /* setup coroutine call */
1340 coro_setup (aTHX_ next);
711 } 1341 }
712 else 1342 else
1343 load_perl (aTHX_ next);
1344
1345 prev__cctx = prev->cctx;
1346
1347 /* possibly untie and reuse the cctx */
1348 if (expect_true (
1349 prev__cctx->idle_sp == STACKLEVEL
1350 && !(prev__cctx->flags & CC_TRACE)
1351 && !force_cctx
1352 ))
713 { 1353 {
714 /* need to start coroutine */ 1354 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
715 /* first get rid of the old state */ 1355 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
716 SAVE (prev, -1); 1356
717 /* setup coroutine call */ 1357 prev->cctx = 0;
718 setup_coro (next); 1358
719 /* need a stack */ 1359 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
720 next->stack = 0; 1360 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1361 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1362 if (!next->cctx)
1363 next->cctx = cctx_get (aTHX);
1364
1365 cctx_put (prev__cctx);
721 } 1366 }
722 1367
723 if (!prev->stack) 1368 ++next->usecount;
724 /* create a new empty context */
725 Newz (0, prev->stack, 1, coro_stack);
726 1369
727 prev__stack = prev->stack; 1370 if (expect_true (!next->cctx))
1371 next->cctx = cctx_get (aTHX);
728 1372
729 /* possibly "free" the stack */ 1373 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
730 if (prev__stack->idle_sp == STACKLEVEL) 1374 transfer_next = next;
1375
1376 if (expect_false (prev__cctx != next->cctx))
731 { 1377 {
732 stack_put (prev__stack); 1378 prev__cctx->top_env = PL_top_env;
733 prev->stack = 0; 1379 PL_top_env = next->cctx->top_env;
1380 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
734 } 1381 }
735 1382
736 if (!next->stack) 1383 transfer_tail (aTHX);
737 next->stack = stack_get (); 1384 }
1385}
738 1386
739 if (prev__stack != next->stack) 1387#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
740 { 1388#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
741 prev__stack->top_env = PL_top_env;
742 PL_top_env = next->stack->top_env;
743 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
744 }
745 1389
746 free_coro_mortal (); 1390/** high level stuff ********************************************************/
747 1391
1392static int
1393coro_state_destroy (pTHX_ struct coro *coro)
1394{
1395 if (coro->flags & CF_DESTROYED)
1396 return 0;
1397
1398 coro->flags |= CF_DESTROYED;
1399
1400 if (coro->flags & CF_READY)
1401 {
1402 /* reduce nready, as destroying a ready coro effectively unreadies it */
1403 /* alternative: look through all ready queues and remove the coro */
1404 LOCK;
1405 --coro_nready;
748 UNLOCK; 1406 UNLOCK;
749 } 1407 }
750} 1408 else
751 1409 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
752/* use this function pointer to call the above function */
753/* this is done to increase chances of the compiler not inlining the call */
754/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
755void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
756
757struct transfer_args
758{
759 struct coro *prev, *next;
760 int flags;
761};
762
763#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
764
765static void
766coro_state_destroy (struct coro *coro)
767{
768 if (coro->refcnt--)
769 return;
770 1410
771 if (coro->mainstack && coro->mainstack != main_mainstack) 1411 if (coro->mainstack && coro->mainstack != main_mainstack)
772 { 1412 {
773 struct coro temp; 1413 struct coro temp;
774 1414
775 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1415 if (coro->flags & CF_RUNNING)
1416 croak ("FATAL: tried to destroy currently running coroutine");
1417
1418 save_perl (aTHX_ &temp);
776 LOAD (aTHX_ coro); 1419 load_perl (aTHX_ coro);
777 1420
778 destroy_stacks (aTHX); 1421 coro_destruct (aTHX_ coro);
779 1422
780 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1423 load_perl (aTHX_ &temp);
781 1424
782 coro->mainstack = 0; 1425 coro->slot = 0;
783 } 1426 }
784 1427
785 stack_free (coro->stack); 1428 cctx_destroy (coro->cctx);
786 SvREFCNT_dec (coro->args); 1429 SvREFCNT_dec (coro->args);
787 Safefree (coro); 1430
1431 if (coro->next) coro->next->prev = coro->prev;
1432 if (coro->prev) coro->prev->next = coro->next;
1433 if (coro == coro_first) coro_first = coro->next;
1434
1435 return 1;
788} 1436}
789 1437
790static int 1438static int
791coro_state_clear (SV *sv, MAGIC *mg) 1439coro_state_free (pTHX_ SV *sv, MAGIC *mg)
792{ 1440{
793 struct coro *coro = (struct coro *)mg->mg_ptr; 1441 struct coro *coro = (struct coro *)mg->mg_ptr;
794 mg->mg_ptr = 0; 1442 mg->mg_ptr = 0;
795 1443
1444 coro->hv = 0;
1445
1446 if (--coro->refcnt < 0)
1447 {
796 coro_state_destroy (coro); 1448 coro_state_destroy (aTHX_ coro);
1449 Safefree (coro);
1450 }
797 1451
798 return 0; 1452 return 0;
799} 1453}
800 1454
801static int 1455static int
802coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1456coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
803{ 1457{
804 struct coro *coro = (struct coro *)mg->mg_ptr; 1458 struct coro *coro = (struct coro *)mg->mg_ptr;
805 1459
806 ++coro->refcnt; 1460 ++coro->refcnt;
807 1461
808 return 0; 1462 return 0;
809} 1463}
810 1464
811static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1465static MGVTBL coro_state_vtbl = {
812 1466 0, 0, 0, 0,
813static struct coro * 1467 coro_state_free,
814SvSTATE (SV *coro) 1468 0,
815{ 1469#ifdef MGf_DUP
816 HV *stash; 1470 coro_state_dup,
817 MAGIC *mg; 1471#else
818 1472# define MGf_DUP 0
819 if (SvROK (coro)) 1473#endif
820 coro = SvRV (coro); 1474};
821
822 stash = SvSTASH (coro);
823 if (stash != coro_stash && stash != coro_state_stash)
824 {
825 /* very slow, but rare, check */
826 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
827 croak ("Coro::State object required");
828 }
829
830 mg = SvMAGIC (coro);
831 assert (mg->mg_type == PERL_MAGIC_ext);
832 return (struct coro *)mg->mg_ptr;
833}
834 1475
835static void 1476static void
836prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags) 1477prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
837{ 1478{
838 ta->prev = SvSTATE (prev); 1479 ta->prev = SvSTATE (prev_sv);
839 ta->next = SvSTATE (next); 1480 ta->next = SvSTATE (next_sv);
840 ta->flags = flags; 1481 TRANSFER_CHECK (*ta);
841} 1482}
842 1483
843static void 1484static void
844api_transfer (SV *prev, SV *next, int flags) 1485api_transfer (SV *prev_sv, SV *next_sv)
845{ 1486{
846 dTHX; 1487 dTHX;
847 struct transfer_args ta; 1488 struct transfer_args ta;
848 1489
849 prepare_transfer (aTHX_ &ta, prev, next, flags); 1490 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
850 TRANSFER (ta); 1491 TRANSFER (ta, 1);
851} 1492}
852 1493
853/** Coro ********************************************************************/ 1494/** Coro ********************************************************************/
854 1495
855#define PRIO_MAX 3
856#define PRIO_HIGH 1
857#define PRIO_NORMAL 0
858#define PRIO_LOW -1
859#define PRIO_IDLE -3
860#define PRIO_MIN -4
861
862/* for Coro.pm */
863static GV *coro_current, *coro_idle;
864static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
865static int coro_nready;
866
867static void 1496static void
868coro_enq (pTHX_ SV *sv) 1497coro_enq (pTHX_ SV *coro_sv)
1498{
1499 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1500}
1501
1502static SV *
1503coro_deq (pTHX)
869{ 1504{
870 int prio; 1505 int prio;
871 1506
872 if (SvTYPE (sv) != SVt_PVHV)
873 croak ("Coro::ready tried to enqueue something that is not a coroutine");
874
875 prio = SvSTATE (sv)->prio;
876
877 av_push (coro_ready [prio - PRIO_MIN], sv);
878 coro_nready++;
879}
880
881static SV *
882coro_deq (pTHX_ int min_prio)
883{
884 int prio = PRIO_MAX - PRIO_MIN;
885
886 min_prio -= PRIO_MIN;
887 if (min_prio < 0)
888 min_prio = 0;
889
890 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1507 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
891 if (AvFILLp (coro_ready [prio]) >= 0) 1508 if (AvFILLp (coro_ready [prio]) >= 0)
892 {
893 coro_nready--;
894 return av_shift (coro_ready [prio]); 1509 return av_shift (coro_ready [prio]);
895 }
896 1510
897 return 0; 1511 return 0;
898} 1512}
899 1513
900static void 1514static int
901api_ready (SV *coro) 1515api_ready (SV *coro_sv)
902{ 1516{
903 dTHX; 1517 dTHX;
1518 struct coro *coro;
1519 SV *sv_hook;
1520 void (*xs_hook)(void);
904 1521
905 if (SvROK (coro)) 1522 if (SvROK (coro_sv))
906 coro = SvRV (coro); 1523 coro_sv = SvRV (coro_sv);
1524
1525 coro = SvSTATE (coro_sv);
1526
1527 if (coro->flags & CF_READY)
1528 return 0;
1529
1530 coro->flags |= CF_READY;
907 1531
908 LOCK; 1532 LOCK;
1533
1534 sv_hook = coro_nready ? 0 : coro_readyhook;
1535 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1536
909 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1537 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1538 ++coro_nready;
1539
910 UNLOCK; 1540 UNLOCK;
911} 1541
1542 if (sv_hook)
1543 {
1544 dSP;
912 1545
1546 ENTER;
1547 SAVETMPS;
1548
1549 PUSHMARK (SP);
1550 PUTBACK;
1551 call_sv (sv_hook, G_DISCARD);
1552 SPAGAIN;
1553
1554 FREETMPS;
1555 LEAVE;
1556 }
1557
1558 if (xs_hook)
1559 xs_hook ();
1560
1561 return 1;
1562}
1563
913static void 1564static int
1565api_is_ready (SV *coro_sv)
1566{
1567 dTHX;
1568
1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1570}
1571
1572INLINE void
914prepare_schedule (aTHX_ struct transfer_args *ta) 1573prepare_schedule (pTHX_ struct transfer_args *ta)
915{ 1574{
916 SV *current, *prev, *next; 1575 SV *prev_sv, *next_sv;
1576
1577 for (;;)
1578 {
1579 LOCK;
1580 next_sv = coro_deq (aTHX);
1581
1582 /* nothing to schedule: call the idle handler */
1583 if (expect_false (!next_sv))
1584 {
1585 dSP;
1586 UNLOCK;
1587
1588 ENTER;
1589 SAVETMPS;
1590
1591 PUSHMARK (SP);
1592 PUTBACK;
1593 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1594 SPAGAIN;
1595
1596 FREETMPS;
1597 LEAVE;
1598 continue;
1599 }
1600
1601 ta->next = SvSTATE (next_sv);
1602
1603 /* cannot transfer to destroyed coros, skip and look for next */
1604 if (expect_false (ta->next->flags & CF_DESTROYED))
1605 {
1606 UNLOCK;
1607 SvREFCNT_dec (next_sv);
1608 /* coro_nready has already been taken care of by destroy */
1609 continue;
1610 }
1611
1612 --coro_nready;
1613 UNLOCK;
1614 break;
1615 }
1616
1617 /* free this only after the transfer */
1618 prev_sv = SvRV (coro_current);
1619 ta->prev = SvSTATE (prev_sv);
1620 TRANSFER_CHECK (*ta);
1621 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1622 ta->next->flags &= ~CF_READY;
1623 SvRV_set (coro_current, next_sv);
917 1624
918 LOCK; 1625 LOCK;
919
920 current = GvSV (coro_current);
921
922 for (;;)
923 {
924 LOCK;
925
926 next = coro_deq (aTHX_ PRIO_MIN);
927
928 if (next)
929 break;
930
931 UNLOCK;
932
933 {
934 dSP;
935
936 ENTER;
937 SAVETMPS;
938
939 PUSHMARK (SP);
940 PUTBACK;
941 call_sv (GvSV (coro_idle), G_DISCARD);
942
943 FREETMPS;
944 LEAVE;
945 }
946 }
947
948 prev = SvRV (current);
949 SvRV (current) = next;
950
951 /* free this only after the transfer */
952 free_coro_mortal (); 1626 free_coro_mortal (aTHX);
953 coro_mortal = prev; 1627 coro_mortal = prev_sv;
954
955 ta->prev = SvSTATE (prev);
956 ta->next = SvSTATE (next);
957 ta->flags = TRANSFER_SAVE_ALL;
958
959 UNLOCK; 1628 UNLOCK;
960} 1629}
961 1630
962static void 1631INLINE void
963prepare_cede (aTHX_ struct transfer_args *ta) 1632prepare_cede (pTHX_ struct transfer_args *ta)
964{ 1633{
965 LOCK; 1634 api_ready (coro_current);
966 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
967 UNLOCK;
968
969 prepare_schedule (ta); 1635 prepare_schedule (aTHX_ ta);
1636}
1637
1638static int
1639prepare_cede_notself (pTHX_ struct transfer_args *ta)
1640{
1641 if (coro_nready)
1642 {
1643 SV *prev = SvRV (coro_current);
1644 prepare_schedule (aTHX_ ta);
1645 api_ready (prev);
1646 return 1;
1647 }
1648 else
1649 return 0;
970} 1650}
971 1651
972static void 1652static void
973api_schedule (void) 1653api_schedule (void)
974{ 1654{
975 dTHX; 1655 dTHX;
976 struct transfer_args ta; 1656 struct transfer_args ta;
977 1657
978 prepare_schedule (&ta); 1658 prepare_schedule (aTHX_ &ta);
979 TRANSFER (ta); 1659 TRANSFER (ta, 1);
980} 1660}
981 1661
982static void 1662static int
983api_cede (void) 1663api_cede (void)
984{ 1664{
985 dTHX; 1665 dTHX;
986 struct transfer_args ta; 1666 struct transfer_args ta;
987 1667
988 prepare_cede (&ta); 1668 prepare_cede (aTHX_ &ta);
1669
1670 if (expect_true (ta.prev != ta.next))
1671 {
1672 TRANSFER (ta, 1);
1673 return 1;
1674 }
1675 else
1676 return 0;
1677}
1678
1679static int
1680api_cede_notself (void)
1681{
1682 dTHX;
1683 struct transfer_args ta;
1684
1685 if (prepare_cede_notself (aTHX_ &ta))
1686 {
1687 TRANSFER (ta, 1);
1688 return 1;
1689 }
1690 else
1691 return 0;
1692}
1693
1694static void
1695api_trace (SV *coro_sv, int flags)
1696{
1697 dTHX;
1698 struct coro *coro = SvSTATE (coro_sv);
1699
1700 if (flags & CC_TRACE)
1701 {
1702 if (!coro->cctx)
1703 coro->cctx = cctx_new_run ();
1704 else if (!(coro->cctx->flags & CC_TRACE))
1705 croak ("cannot enable tracing on coroutine with custom stack");
1706
1707 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1708 }
1709 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1710 {
1711 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1712
1713 if (coro->flags & CF_RUNNING)
1714 PL_runops = RUNOPS_DEFAULT;
1715 else
1716 coro->slot->runops = RUNOPS_DEFAULT;
1717 }
1718}
1719
1720#if 0
1721static int
1722coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1723{
1724 AV *padlist;
1725 AV *av = (AV *)mg->mg_obj;
1726
1727 abort ();
1728
1729 return 0;
1730}
1731
1732static MGVTBL coro_gensub_vtbl = {
1733 0, 0, 0, 0,
1734 coro_gensub_free
1735};
1736#endif
1737
1738/*****************************************************************************/
1739/* PerlIO::cede */
1740
1741typedef struct
1742{
1743 PerlIOBuf base;
1744 NV next, every;
1745} PerlIOCede;
1746
1747static IV
1748PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1749{
1750 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1751
1752 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1753 self->next = nvtime () + self->every;
1754
1755 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1756}
1757
1758static SV *
1759PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1760{
1761 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1762
1763 return newSVnv (self->every);
1764}
1765
1766static IV
1767PerlIOCede_flush (pTHX_ PerlIO *f)
1768{
1769 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1770 double now = nvtime ();
1771
1772 if (now >= self->next)
1773 {
1774 api_cede ();
1775 self->next = now + self->every;
1776 }
1777
1778 return PerlIOBuf_flush (aTHX_ f);
1779}
1780
1781static PerlIO_funcs PerlIO_cede =
1782{
1783 sizeof(PerlIO_funcs),
1784 "cede",
1785 sizeof(PerlIOCede),
1786 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1787 PerlIOCede_pushed,
1788 PerlIOBuf_popped,
1789 PerlIOBuf_open,
1790 PerlIOBase_binmode,
1791 PerlIOCede_getarg,
1792 PerlIOBase_fileno,
1793 PerlIOBuf_dup,
1794 PerlIOBuf_read,
1795 PerlIOBuf_unread,
1796 PerlIOBuf_write,
1797 PerlIOBuf_seek,
1798 PerlIOBuf_tell,
1799 PerlIOBuf_close,
1800 PerlIOCede_flush,
1801 PerlIOBuf_fill,
1802 PerlIOBase_eof,
1803 PerlIOBase_error,
1804 PerlIOBase_clearerr,
1805 PerlIOBase_setlinebuf,
1806 PerlIOBuf_get_base,
1807 PerlIOBuf_bufsiz,
1808 PerlIOBuf_get_ptr,
1809 PerlIOBuf_get_cnt,
1810 PerlIOBuf_set_ptrcnt,
1811};
1812
1813/*****************************************************************************/
1814
1815static const CV *ssl_cv; /* for quick consistency check */
1816
1817static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1818static SV *ssl_arg0;
1819static SV *ssl_arg1;
1820
1821/* this restores the stack in the case we patched the entersub, to */
1822/* recreate the stack frame as perl will on following calls */
1823/* since entersub cleared the stack */
1824static OP *
1825pp_restore (pTHX)
1826{
1827 dSP;
1828
1829 PUSHMARK (SP);
1830
1831 EXTEND (SP, 3);
1832 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;
1833 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1834 PUSHs ((SV *)CvGV (ssl_cv));
1835
1836 RETURNOP (ssl_restore.op_first);
1837}
1838
1839/* declare prototype */
1840XS(XS_Coro__State__set_stacklevel);
1841
1842static OP *
1843pp_set_stacklevel (pTHX)
1844{
1845 dSP;
1846 struct transfer_args ta;
1847 SV **arg = PL_stack_base + TOPMARK + 1;
1848 int items = SP - arg; /* args without function object */
1849
1850 /* do a quick consistency check on the "function" object, and if it isn't */
1851 /* for us, divert to the real entersub */
1852 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1853 return PL_ppaddr[OP_ENTERSUB](aTHX);
1854
1855 /* pop args */
1856 SP = PL_stack_base + POPMARK;
1857
1858 if (!(PL_op->op_flags & OPf_STACKED))
1859 {
1860 /* ampersand-form of call, use @_ instead of stack */
1861 AV *av = GvAV (PL_defgv);
1862 arg = AvARRAY (av);
1863 items = AvFILLp (av) + 1;
1864 }
1865
1866 PUTBACK;
1867 switch (PL_op->op_private & 7)
1868 {
1869 case 0:
1870 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1871 break;
1872
1873 case 1:
1874 if (items != 2)
1875 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1876
1877 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1878 break;
1879
1880 case 2:
1881 prepare_schedule (aTHX_ &ta);
1882 break;
1883
1884 case 3:
1885 prepare_cede (aTHX_ &ta);
1886 break;
1887
1888 case 4:
1889 if (!prepare_cede_notself (aTHX_ &ta))
1890 RETURN;
1891
1892 break;
1893 }
1894
989 TRANSFER (ta); 1895 TRANSFER (ta, 0);
990} 1896 SPAGAIN;
991 1897
1898skip:
1899
1900 RETURN;
1901}
1902
992MODULE = Coro::State PACKAGE = Coro::State 1903MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
993 1904
994PROTOTYPES: DISABLE 1905PROTOTYPES: DISABLE
995 1906
996BOOT: 1907# these not obviously related functions are all rolled into the same xs
997{ 1908# function to increase chances that they all will call transfer with the same
998#ifdef USE_ITHREADS 1909# stack offset
999 MUTEX_INIT (&coro_mutex);
1000#endif
1001 BOOT_PAGESIZE;
1002
1003 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1004
1005 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
1006 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
1007 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
1008
1009 main_mainstack = PL_mainstack;
1010
1011 coroapi.ver = CORO_API_VERSION;
1012 coroapi.transfer = api_transfer;
1013
1014 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1015}
1016
1017SV *
1018new (char *klass, ...)
1019 CODE:
1020{
1021 struct coro *coro;
1022 HV *hv;
1023 int i;
1024
1025 Newz (0, coro, 1, struct coro);
1026 coro->args = newAV ();
1027
1028 hv = newHV ();
1029 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1030 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1031
1032 for (i = 1; i < items; i++)
1033 av_push (coro->args, newSVsv (ST (i)));
1034
1035 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1036 /*coro->stack = 0;*/
1037}
1038 OUTPUT:
1039 RETVAL
1040
1041void 1910void
1042_set_stacklevel (...) 1911_set_stacklevel (...)
1043 ALIAS: 1912 ALIAS:
1044 Coro::State::transfer = 1 1913 Coro::State::transfer = 1
1045 Coro::schedule = 2 1914 Coro::schedule = 2
1046 Coro::cede = 3 1915 Coro::cede = 3
1047 Coro::Cont::yield = 4 1916 Coro::cede_notself = 4
1048 CODE: 1917 CODE:
1049{ 1918{
1050 struct transfer_args ta; 1919 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1051 1920
1052 switch (ix) 1921 /* we patch the op, and then re-run the whole call */
1922 /* we have to put some dummy argument on the stack for this to work */
1923 /* TODO: walk back the opcode chain (but how?), nuke the pp_gv etc. */
1924 ssl_restore.op_next = (OP *)&ssl_restore;
1925 ssl_restore.op_type = OP_NULL;
1926 ssl_restore.op_ppaddr = pp_restore;
1927 ssl_restore.op_first = PL_op;
1928
1929 ssl_arg0 = items > 0 ? SvREFCNT_inc (ST (0)) : 0;
1930 ssl_arg1 = items > 1 ? SvREFCNT_inc (ST (1)) : 0;
1931
1932 PL_op->op_ppaddr = pp_set_stacklevel;
1933 PL_op->op_private = PL_op->op_private & ~7 | ix; /* we potentially share our private flags with entersub */
1934
1935 PL_op = (OP *)&ssl_restore;
1936}
1937
1938BOOT:
1939{
1940#ifdef USE_ITHREADS
1941 MUTEX_INIT (&coro_lock);
1942# if CORO_PTHREAD
1943 coro_thx = PERL_GET_CONTEXT;
1944# endif
1945#endif
1946 BOOT_PAGESIZE;
1947
1948 ssl_cv = get_cv ("Coro::State::_set_stacklevel", 0);
1949
1950 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1951 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1952
1953 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1954 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1955 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1956
1957 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1958 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1959 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1960
1961 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1962
1963 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1964 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1965 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1966 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1967
1968 main_mainstack = PL_mainstack;
1969 main_top_env = PL_top_env;
1970
1971 while (main_top_env->je_prev)
1972 main_top_env = main_top_env->je_prev;
1973
1974 coroapi.ver = CORO_API_VERSION;
1975 coroapi.rev = CORO_API_REVISION;
1976 coroapi.transfer = api_transfer;
1977
1053 { 1978 {
1054 case 0: 1979 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1055 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1056 ta.next = 0;
1057 ta.flags = TRANSFER_SET_STACKLEVEL;
1058 break;
1059 1980
1060 case 1: 1981 if (!svp) croak ("Time::HiRes is required");
1061 if (items != 3) 1982 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1062 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1063 1983
1064 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1984 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1065 break;
1066
1067 case 2:
1068 prepare_schedule (&ta);
1069 break;
1070
1071 case 3:
1072 prepare_cede (&ta);
1073 break;
1074
1075 case 4:
1076 {
1077 SV *yieldstack;
1078 SV *sv;
1079 AV *defav = GvAV (PL_defgv);
1080
1081 yieldstack = *hv_fetch (
1082 (HV *)SvRV (GvSV (coro_current)),
1083 "yieldstack", sizeof ("yieldstack") - 1,
1084 0
1085 );
1086
1087 /* set up @_ -- ugly */
1088 av_clear (defav);
1089 av_fill (defav, items - 1);
1090 while (items--)
1091 av_store (defav, items, SvREFCNT_inc (ST(items)));
1092
1093 sv = av_pop ((AV *)SvRV (yieldstack));
1094 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1095 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1096 ta.flags = 0;
1097 SvREFCNT_dec (sv);
1098 }
1099 break;
1100
1101 } 1985 }
1102 1986
1103 TRANSFER (ta); 1987 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1104} 1988}
1989
1990SV *
1991new (char *klass, ...)
1992 CODE:
1993{
1994 struct coro *coro;
1995 MAGIC *mg;
1996 HV *hv;
1997 int i;
1998
1999 Newz (0, coro, 1, struct coro);
2000 coro->args = newAV ();
2001 coro->flags = CF_NEW;
2002
2003 if (coro_first) coro_first->prev = coro;
2004 coro->next = coro_first;
2005 coro_first = coro;
2006
2007 coro->hv = hv = newHV ();
2008 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2009 mg->mg_flags |= MGf_DUP;
2010 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2011
2012 av_extend (coro->args, items - 1);
2013 for (i = 1; i < items; i++)
2014 av_push (coro->args, newSVsv (ST (i)));
2015}
2016 OUTPUT:
2017 RETVAL
2018
2019bool
2020_destroy (SV *coro_sv)
2021 CODE:
2022 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2023 OUTPUT:
2024 RETVAL
1105 2025
1106void 2026void
1107_clone_state_from (SV *dst, SV *src)
1108 CODE:
1109{
1110 struct coro *coro_src = SvSTATE (src);
1111
1112 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1113
1114 ++coro_src->refcnt;
1115 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1116}
1117
1118void
1119_nonlocal_goto (IV nextop)
1120 CODE:
1121 /* uuh, somebody will kill me again for this */
1122 PL_op->op_next = INT2PTR (OP *, nextop);
1123
1124void
1125_exit (code) 2027_exit (int code)
1126 int code
1127 PROTOTYPE: $ 2028 PROTOTYPE: $
1128 CODE: 2029 CODE:
1129 _exit (code); 2030 _exit (code);
1130 2031
2032int
2033cctx_stacksize (int new_stacksize = 0)
2034 CODE:
2035 RETVAL = cctx_stacksize;
2036 if (new_stacksize)
2037 {
2038 cctx_stacksize = new_stacksize;
2039 ++cctx_gen;
2040 }
2041 OUTPUT:
2042 RETVAL
2043
2044int
2045cctx_max_idle (int max_idle = 0)
2046 CODE:
2047 RETVAL = cctx_max_idle;
2048 if (max_idle > 1)
2049 cctx_max_idle = max_idle;
2050 OUTPUT:
2051 RETVAL
2052
2053int
2054cctx_count ()
2055 CODE:
2056 RETVAL = cctx_count;
2057 OUTPUT:
2058 RETVAL
2059
2060int
2061cctx_idle ()
2062 CODE:
2063 RETVAL = cctx_idle;
2064 OUTPUT:
2065 RETVAL
2066
2067void
2068list ()
2069 PPCODE:
2070{
2071 struct coro *coro;
2072 for (coro = coro_first; coro; coro = coro->next)
2073 if (coro->hv)
2074 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2075}
2076
2077void
2078call (Coro::State coro, SV *coderef)
2079 ALIAS:
2080 eval = 1
2081 CODE:
2082{
2083 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2084 {
2085 struct coro temp;
2086
2087 if (!(coro->flags & CF_RUNNING))
2088 {
2089 PUTBACK;
2090 save_perl (aTHX_ &temp);
2091 load_perl (aTHX_ coro);
2092 }
2093
2094 {
2095 dSP;
2096 ENTER;
2097 SAVETMPS;
2098 PUTBACK;
2099 PUSHSTACK;
2100 PUSHMARK (SP);
2101
2102 if (ix)
2103 eval_sv (coderef, 0);
2104 else
2105 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2106
2107 POPSTACK;
2108 SPAGAIN;
2109 FREETMPS;
2110 LEAVE;
2111 PUTBACK;
2112 }
2113
2114 if (!(coro->flags & CF_RUNNING))
2115 {
2116 save_perl (aTHX_ coro);
2117 load_perl (aTHX_ &temp);
2118 SPAGAIN;
2119 }
2120 }
2121}
2122
2123SV *
2124is_ready (Coro::State coro)
2125 PROTOTYPE: $
2126 ALIAS:
2127 is_ready = CF_READY
2128 is_running = CF_RUNNING
2129 is_new = CF_NEW
2130 is_destroyed = CF_DESTROYED
2131 CODE:
2132 RETVAL = boolSV (coro->flags & ix);
2133 OUTPUT:
2134 RETVAL
2135
2136void
2137throw (Coro::State self, SV *throw = &PL_sv_undef)
2138 PROTOTYPE: $;$
2139 CODE:
2140 SvREFCNT_dec (self->throw);
2141 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2142
2143void
2144api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2145
2146SV *
2147has_cctx (Coro::State coro)
2148 PROTOTYPE: $
2149 CODE:
2150 RETVAL = boolSV (!!coro->cctx);
2151 OUTPUT:
2152 RETVAL
2153
2154int
2155is_traced (Coro::State coro)
2156 PROTOTYPE: $
2157 CODE:
2158 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2159 OUTPUT:
2160 RETVAL
2161
2162UV
2163rss (Coro::State coro)
2164 PROTOTYPE: $
2165 ALIAS:
2166 usecount = 1
2167 CODE:
2168 switch (ix)
2169 {
2170 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2171 case 1: RETVAL = coro->usecount; break;
2172 }
2173 OUTPUT:
2174 RETVAL
2175
2176void
2177force_cctx ()
2178 CODE:
2179 struct coro *coro = SvSTATE (coro_current);
2180 coro->cctx->idle_sp = 0;
2181
2182void
2183swap_defsv (Coro::State self)
2184 PROTOTYPE: $
2185 ALIAS:
2186 swap_defav = 1
2187 CODE:
2188 if (!self->slot)
2189 croak ("cannot swap state with coroutine that has no saved state");
2190 else
2191 {
2192 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2193 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2194
2195 SV *tmp = *src; *src = *dst; *dst = tmp;
2196 }
2197
1131MODULE = Coro::State PACKAGE = Coro 2198MODULE = Coro::State PACKAGE = Coro
1132 2199
1133BOOT: 2200BOOT:
1134{ 2201{
1135 int i; 2202 int i;
1136 2203
2204 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2205 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2206 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2207
2208 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2209 SvREADONLY_on (coro_current);
2210
1137 coro_stash = gv_stashpv ("Coro", TRUE); 2211 coro_stash = gv_stashpv ("Coro", TRUE);
1138 2212
1139 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2213 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1140 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2214 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1141 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2215 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1142 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2216 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1143 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2217 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1144 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2218 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1145 2219
1146 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1147 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1148
1149 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2220 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1150 coro_ready[i] = newAV (); 2221 coro_ready[i] = newAV ();
1151 2222
1152 { 2223 {
1153 SV *sv = perl_get_sv("Coro::API", 1); 2224 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1154 2225
1155 coroapi.schedule = api_schedule; 2226 coroapi.schedule = api_schedule;
1156 coroapi.cede = api_cede; 2227 coroapi.cede = api_cede;
2228 coroapi.cede_notself = api_cede_notself;
1157 coroapi.ready = api_ready; 2229 coroapi.ready = api_ready;
2230 coroapi.is_ready = api_is_ready;
1158 coroapi.nready = &coro_nready; 2231 coroapi.nready = &coro_nready;
1159 coroapi.current = coro_current; 2232 coroapi.current = coro_current;
1160 2233
1161 GCoroAPI = &coroapi; 2234 GCoroAPI = &coroapi;
1162 sv_setiv (sv, (IV)&coroapi); 2235 sv_setiv (sv, (IV)&coroapi);
1163 SvREADONLY_on (sv); 2236 SvREADONLY_on (sv);
1164 } 2237 }
1165} 2238}
2239
2240void
2241_set_current (SV *current)
2242 PROTOTYPE: $
2243 CODE:
2244 SvREFCNT_dec (SvRV (coro_current));
2245 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2246
2247void
2248_set_readyhook (SV *hook)
2249 PROTOTYPE: $
2250 CODE:
2251 LOCK;
2252 SvREFCNT_dec (coro_readyhook);
2253 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2254 UNLOCK;
1166 2255
1167int 2256int
1168prio (Coro::State coro, int newprio = 0) 2257prio (Coro::State coro, int newprio = 0)
1169 ALIAS: 2258 ALIAS:
1170 nice = 1 2259 nice = 1
… …
1173 RETVAL = coro->prio; 2262 RETVAL = coro->prio;
1174 2263
1175 if (items > 1) 2264 if (items > 1)
1176 { 2265 {
1177 if (ix) 2266 if (ix)
1178 newprio += coro->prio; 2267 newprio = coro->prio - newprio;
1179 2268
1180 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2269 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1181 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2270 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1182 2271
1183 coro->prio = newprio; 2272 coro->prio = newprio;
1184 } 2273 }
1185} 2274}
2275 OUTPUT:
2276 RETVAL
1186 2277
1187void 2278SV *
1188ready (SV *self) 2279ready (SV *self)
1189 PROTOTYPE: $ 2280 PROTOTYPE: $
1190 CODE: 2281 CODE:
1191 api_ready (self); 2282 RETVAL = boolSV (api_ready (self));
2283 OUTPUT:
2284 RETVAL
1192 2285
1193int 2286int
1194nready (...) 2287nready (...)
1195 PROTOTYPE: 2288 PROTOTYPE:
1196 CODE: 2289 CODE:
1197 RETVAL = coro_nready; 2290 RETVAL = coro_nready;
1198 OUTPUT: 2291 OUTPUT:
1199 RETVAL 2292 RETVAL
1200 2293
1201MODULE = Coro::State PACKAGE = Coro::AIO 2294# for async_pool speedup
2295void
2296_pool_1 (SV *cb)
2297 CODE:
2298{
2299 struct coro *coro = SvSTATE (coro_current);
2300 HV *hv = (HV *)SvRV (coro_current);
2301 AV *defav = GvAV (PL_defgv);
2302 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2303 AV *invoke_av;
2304 int i, len;
2305
2306 if (!invoke)
2307 {
2308 SV *old = PL_diehook;
2309 PL_diehook = 0;
2310 SvREFCNT_dec (old);
2311 croak ("\3async_pool terminate\2\n");
2312 }
2313
2314 SvREFCNT_dec (coro->saved_deffh);
2315 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2316
2317 hv_store (hv, "desc", sizeof ("desc") - 1,
2318 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2319
2320 invoke_av = (AV *)SvRV (invoke);
2321 len = av_len (invoke_av);
2322
2323 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2324
2325 if (len > 0)
2326 {
2327 av_fill (defav, len - 1);
2328 for (i = 0; i < len; ++i)
2329 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2330 }
2331
2332 SvREFCNT_dec (invoke);
2333}
2334
2335void
2336_pool_2 (SV *cb)
2337 CODE:
2338{
2339 struct coro *coro = SvSTATE (coro_current);
2340
2341 sv_setsv (cb, &PL_sv_undef);
2342
2343 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2344 coro->saved_deffh = 0;
2345
2346 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2347 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2348 {
2349 SV *old = PL_diehook;
2350 PL_diehook = 0;
2351 SvREFCNT_dec (old);
2352 croak ("\3async_pool terminate\2\n");
2353 }
2354
2355 av_clear (GvAV (PL_defgv));
2356 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2357 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2358
2359 coro->prio = 0;
2360
2361 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2362 api_trace (coro_current, 0);
2363
2364 av_push (av_async_pool, newSVsv (coro_current));
2365}
2366
2367#if 0
2368
2369void
2370_generator_call (...)
2371 PROTOTYPE: @
2372 PPCODE:
2373 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2374 xxxx
2375 abort ();
1202 2376
1203SV * 2377SV *
1204_get_state () 2378gensub (SV *sub, ...)
1205 CODE: 2379 PROTOTYPE: &;@
2380 CODE:
1206{ 2381{
1207 struct { 2382 struct coro *coro;
1208 int errorno; 2383 MAGIC *mg;
1209 int laststype; 2384 CV *xcv;
1210 int laststatval; 2385 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1211 Stat_t statcache; 2386 int i;
1212 } data;
1213 2387
1214 data.errorno = errno; 2388 CvGV (ncv) = CvGV (cv);
1215 data.laststype = PL_laststype; 2389 CvFILE (ncv) = CvFILE (cv);
1216 data.laststatval = PL_laststatval;
1217 data.statcache = PL_statcache;
1218 2390
1219 RETVAL = newSVpvn ((char *)&data, sizeof data); 2391 Newz (0, coro, 1, struct coro);
2392 coro->args = newAV ();
2393 coro->flags = CF_NEW;
2394
2395 av_extend (coro->args, items - 1);
2396 for (i = 1; i < items; i++)
2397 av_push (coro->args, newSVsv (ST (i)));
2398
2399 CvISXSUB_on (ncv);
2400 CvXSUBANY (ncv).any_ptr = (void *)coro;
2401
2402 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2403
2404 CvXSUB (ncv) = CvXSUB (xcv);
2405 CvANON_on (ncv);
2406
2407 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2408 RETVAL = newRV_noinc ((SV *)ncv);
1220} 2409}
1221 OUTPUT: 2410 OUTPUT:
1222 RETVAL 2411 RETVAL
1223 2412
2413#endif
2414
2415
2416MODULE = Coro::State PACKAGE = Coro::AIO
2417
1224void 2418void
1225_set_state (char *data_) 2419_get_state (SV *self)
2420 PPCODE:
2421{
2422 AV *defav = GvAV (PL_defgv);
2423 AV *av = newAV ();
2424 int i;
2425 SV *data_sv = newSV (sizeof (struct io_state));
2426 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2427 SvCUR_set (data_sv, sizeof (struct io_state));
2428 SvPOK_only (data_sv);
2429
2430 data->errorno = errno;
2431 data->laststype = PL_laststype;
2432 data->laststatval = PL_laststatval;
2433 data->statcache = PL_statcache;
2434
2435 av_extend (av, AvFILLp (defav) + 1 + 1);
2436
2437 for (i = 0; i <= AvFILLp (defav); ++i)
2438 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2439
2440 av_push (av, data_sv);
2441
2442 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2443
2444 api_ready (self);
2445}
2446
2447void
2448_set_state (SV *state)
1226 PROTOTYPE: $ 2449 PROTOTYPE: $
2450 PPCODE:
2451{
2452 AV *av = (AV *)SvRV (state);
2453 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2454 int i;
2455
2456 errno = data->errorno;
2457 PL_laststype = data->laststype;
2458 PL_laststatval = data->laststatval;
2459 PL_statcache = data->statcache;
2460
2461 EXTEND (SP, AvFILLp (av));
2462 for (i = 0; i < AvFILLp (av); ++i)
2463 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2464}
2465
2466
2467MODULE = Coro::State PACKAGE = Coro::AnyEvent
2468
2469BOOT:
2470 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2471
2472SV *
2473_schedule (...)
2474 PROTOTYPE: @
1227 CODE: 2475 CODE:
1228{ 2476{
1229 struct { 2477 static int incede;
1230 int errorno;
1231 int laststype;
1232 int laststatval;
1233 Stat_t statcache;
1234 } *data = (void *)data_;
1235 2478
1236 errno = data->errorno; 2479 api_cede_notself ();
1237 PL_laststype = data->laststype; 2480
1238 PL_laststatval = data->laststatval; 2481 ++incede;
1239 PL_statcache = data->statcache; 2482 while (coro_nready >= incede && api_cede ())
2483 ;
2484
2485 sv_setsv (sv_activity, &PL_sv_undef);
2486 if (coro_nready >= incede)
2487 {
2488 PUSHMARK (SP);
2489 PUTBACK;
2490 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2491 SPAGAIN;
2492 }
2493
2494 --incede;
1240} 2495}
2496
2497
2498MODULE = Coro::State PACKAGE = PerlIO::cede
2499
2500BOOT:
2501 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2502

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