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Comparing Coro/Coro/State.xs (file contents):
Revision 1.78 by root, Wed Nov 1 01:21:21 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 <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 top-level JMPENV for each coroutine, needed to catch dies. */ 259 /* the c coroutine allocated to this perl coroutine, if any */
106 JMPENV start_env; 260 coro_cctx *cctx;
107 261
108 /* the optional C context */ 262 /* process data */
109 coro_stack *stack;
110 void *cursp;
111 int gencnt;
112
113 /* optionally saved, might be zero */
114 AV *defav;
115 SV *defsv;
116 SV *errsv;
117
118 /* saved global state not related to stacks */
119 U8 dowarn;
120 I32 in_eval;
121
122 /* the stacks and related info (callchain etc..) */
123 PERL_SI *curstackinfo;
124 AV *curstack;
125 AV *mainstack; 263 AV *mainstack;
126 SV **stack_sp; 264 perl_slots *slot; /* basically the saved sp */
127 OP *op;
128 SV **curpad;
129 AV *comppad;
130 CV *compcv;
131 SV **stack_base;
132 SV **stack_max;
133 SV **tmps_stack;
134 I32 tmps_floor;
135 I32 tmps_ix;
136 I32 tmps_max;
137 I32 *markstack;
138 I32 *markstack_ptr;
139 I32 *markstack_max;
140 I32 *scopestack;
141 I32 scopestack_ix;
142 I32 scopestack_max;
143 ANY *savestack;
144 I32 savestack_ix;
145 I32 savestack_max;
146 OP **retstack;
147 I32 retstack_ix;
148 I32 retstack_max;
149 PMOP *curpm;
150 COP *curcop;
151 JMPENV *top_env;
152 265
153 /* data associated with this coroutine (initial args) */ 266 AV *args; /* data associated with this coroutine (initial args) */
154 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;
155}; 283};
156 284
157typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
158typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
159 287
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
160static AV * 336static AV *
161coro_clone_padlist (pTHX_ CV *cv) 337coro_clone_padlist (pTHX_ CV *cv)
162{ 338{
163 AV *padlist = CvPADLIST (cv); 339 AV *padlist = CvPADLIST (cv);
164 AV *newpadlist, *newpad; 340 AV *newpadlist, *newpad;
165 341
166 newpadlist = newAV (); 342 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 343 AvREAL_off (newpadlist);
344#if PERL_VERSION_ATLEAST (5,10,0)
345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
346#else
168 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
348#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 349 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist); 350 --AvFILLp (padlist);
171 351
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 352 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
173 av_store (newpadlist, 1, (SV *)newpad); 353 av_store (newpadlist, 1, (SV *)newpad);
174 354
175 return newpadlist; 355 return newpadlist;
176} 356}
177 357
… …
207 387
208 /* casting is fun. */ 388 /* casting is fun. */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 389 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210 free_padlist (aTHX_ padlist); 390 free_padlist (aTHX_ padlist);
211 391
212 SvREFCNT_dec (av); 392 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
213 393
214 return 0; 394 return 0;
215} 395}
216 396
217#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
218 399
219static 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))
220 440
221/* the next two functions merely cache the padlists */ 441/* the next two functions merely cache the padlists */
222static void 442static void
223get_padlist (pTHX_ CV *cv) 443get_padlist (pTHX_ CV *cv)
224{ 444{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 445 MAGIC *mg = CORO_MAGIC_cv (cv);
446 AV *av;
226 447
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 448 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 449 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229 else 450 else
230 { 451 {
231#if 0 452#if CORO_PREFER_PERL_FUNCTIONS
232 /* this should work - but it doesn't :( */ 453 /* this is probably cleaner? but also slower! */
454 /* in practise, it seems to be less stable */
233 CV *cp = Perl_cv_clone (aTHX_ cv); 455 CV *cp = Perl_cv_clone (cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 456 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 457 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 458 SvREFCNT_dec (cp);
237#else 459#else
238 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 460 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
241} 463}
242 464
243static void 465static void
244put_padlist (pTHX_ CV *cv) 466put_padlist (pTHX_ CV *cv)
245{ 467{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 468 MAGIC *mg = CORO_MAGIC_cv (cv);
469 AV *av;
247 470
248 if (!mg) 471 if (expect_false (!mg))
249 { 472 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV ();
254 }
255 473
256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 474 av = (AV *)mg->mg_obj;
257}
258 475
259#define SB do { 476 if (expect_false (AvFILLp (av) >= AvMAX (av)))
260#define SE } while (0) 477 av_extend (av, AvMAX (av) + 1);
261 478
262#define LOAD(state) load_state(aTHX_ (state)); 479 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 480}
264 481
265#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 482/** load & save, init *******************************************************/
266 483
267static void 484static void
268load_state(pTHX_ Coro__State c) 485load_perl (pTHX_ Coro__State c)
269{ 486{
270 PL_dowarn = c->dowarn; 487 perl_slots *slot = c->slot;
271 PL_in_eval = c->in_eval; 488 c->slot = 0;
272 489
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack; 490 PL_mainstack = c->mainstack;
276 PL_stack_sp = c->stack_sp;
277 PL_op = c->op;
278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
281 PL_stack_base = c->stack_base;
282 PL_stack_max = c->stack_max;
283 PL_tmps_stack = c->tmps_stack;
284 PL_tmps_floor = c->tmps_floor;
285 PL_tmps_ix = c->tmps_ix;
286 PL_tmps_max = c->tmps_max;
287 PL_markstack = c->markstack;
288 PL_markstack_ptr = c->markstack_ptr;
289 PL_markstack_max = c->markstack_max;
290 PL_scopestack = c->scopestack;
291 PL_scopestack_ix = c->scopestack_ix;
292 PL_scopestack_max = c->scopestack_max;
293 PL_savestack = c->savestack;
294 PL_savestack_ix = c->savestack_ix;
295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
297 PL_retstack = c->retstack;
298 PL_retstack_ix = c->retstack_ix;
299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
302 PL_curcop = c->curcop;
303 PL_top_env = c->top_env;
304 491
305 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 492 GvSV (PL_defgv) = slot->defsv;
306 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 493 GvAV (PL_defgv) = slot->defav;
307 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
308 500
309 { 501 {
310 dSP; 502 dSP;
503
311 CV *cv; 504 CV *cv;
312 505
313 /* now do the ugly restore mess */ 506 /* now do the ugly restore mess */
314 while ((cv = (CV *)POPs)) 507 while (expect_true (cv = (CV *)POPs))
315 { 508 {
316 AV *padlist = (AV *)POPs;
317
318 if (padlist)
319 {
320 put_padlist (aTHX_ cv); /* mark this padlist as available */ 509 put_padlist (aTHX_ cv); /* mark this padlist as available */
321 CvPADLIST(cv) = padlist; 510 CvDEPTH (cv) = PTR2IV (POPs);
322 } 511 CvPADLIST (cv) = (AV *)POPs;
323
324 ++CvDEPTH(cv);
325 } 512 }
326 513
327 PUTBACK; 514 PUTBACK;
328 } 515 }
329} 516}
330 517
331static void 518static void
332save_state(pTHX_ Coro__State c, int flags) 519save_perl (pTHX_ Coro__State c)
333{ 520{
334 { 521 {
335 dSP; 522 dSP;
336 I32 cxix = cxstack_ix; 523 I32 cxix = cxstack_ix;
337 PERL_CONTEXT *ccstk = cxstack; 524 PERL_CONTEXT *ccstk = cxstack;
… …
340 /* 527 /*
341 * 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
342 * (and reinitialize) all cv's in the whole callchain :( 529 * (and reinitialize) all cv's in the whole callchain :(
343 */ 530 */
344 531
345 PUSHs (Nullsv); 532 XPUSHs (Nullsv);
346 /* this loop was inspired by pp_caller */ 533 /* this loop was inspired by pp_caller */
347 for (;;) 534 for (;;)
348 { 535 {
349 while (cxix >= 0) 536 while (expect_true (cxix >= 0))
350 { 537 {
351 PERL_CONTEXT *cx = &ccstk[cxix--]; 538 PERL_CONTEXT *cx = &ccstk[cxix--];
352 539
353 if (CxTYPE(cx) == CXt_SUB) 540 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
354 { 541 {
355 CV *cv = cx->blk_sub.cv; 542 CV *cv = cx->blk_sub.cv;
543
356 if (CvDEPTH(cv)) 544 if (expect_true (CvDEPTH (cv)))
357 { 545 {
358 EXTEND (SP, CvDEPTH(cv)*2); 546 EXTEND (SP, 3);
359
360 while (--CvDEPTH(cv))
361 {
362 /* this tells the restore code to increment CvDEPTH */
363 PUSHs (Nullsv);
364 PUSHs ((SV *)cv);
365 }
366
367 PUSHs ((SV *)CvPADLIST(cv)); 547 PUSHs ((SV *)CvPADLIST (cv));
548 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
368 PUSHs ((SV *)cv); 549 PUSHs ((SV *)cv);
369 550
551 CvDEPTH (cv) = 0;
370 get_padlist (aTHX_ cv); 552 get_padlist (aTHX_ cv);
371 } 553 }
372 } 554 }
373#ifdef CXt_FORMAT
374 else if (CxTYPE(cx) == CXt_FORMAT)
375 {
376 /* I never used formats, so how should I know how these are implemented? */
377 /* my bold guess is as a simple, plain sub... */
378 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
379 }
380#endif
381 } 555 }
382 556
383 if (top_si->si_type == PERLSI_MAIN) 557 if (expect_true (top_si->si_type == PERLSI_MAIN))
384 break; 558 break;
385 559
386 top_si = top_si->si_prev; 560 top_si = top_si->si_prev;
387 ccstk = top_si->si_cxstack; 561 ccstk = top_si->si_cxstack;
388 cxix = top_si->si_cxix; 562 cxix = top_si->si_cxix;
389 } 563 }
390 564
391 PUTBACK; 565 PUTBACK;
392 } 566 }
393 567
394 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 568 /* allocate some space on the context stack for our purposes */
395 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 569 /* we manually unroll here, as usually 2 slots is enough */
396 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 */
397 579
398 c->dowarn = PL_dowarn;
399 c->in_eval = PL_in_eval;
400
401 c->curstackinfo = PL_curstackinfo;
402 c->curstack = PL_curstack;
403 c->mainstack = PL_mainstack; 580 c->mainstack = PL_mainstack;
404 c->stack_sp = PL_stack_sp; 581
405 c->op = PL_op; 582 {
406 c->curpad = PL_curpad; 583 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
407 c->comppad = PL_comppad; 584
408 c->compcv = PL_compcv; 585 slot->defav = GvAV (PL_defgv);
409 c->stack_base = PL_stack_base; 586 slot->defsv = DEFSV;
410 c->stack_max = PL_stack_max; 587 slot->errsv = ERRSV;
411 c->tmps_stack = PL_tmps_stack; 588 slot->irsgv = GvSV (irsgv);
412 c->tmps_floor = PL_tmps_floor; 589
413 c->tmps_ix = PL_tmps_ix; 590 #define VAR(name,type) slot->name = PL_ ## name;
414 c->tmps_max = PL_tmps_max; 591 # include "state.h"
415 c->markstack = PL_markstack; 592 #undef VAR
416 c->markstack_ptr = PL_markstack_ptr; 593 }
417 c->markstack_max = PL_markstack_max;
418 c->scopestack = PL_scopestack;
419 c->scopestack_ix = PL_scopestack_ix;
420 c->scopestack_max = PL_scopestack_max;
421 c->savestack = PL_savestack;
422 c->savestack_ix = PL_savestack_ix;
423 c->savestack_max = PL_savestack_max;
424#if PERL_VERSION < 9
425 c->retstack = PL_retstack;
426 c->retstack_ix = PL_retstack_ix;
427 c->retstack_max = PL_retstack_max;
428#endif
429 c->curpm = PL_curpm;
430 c->curcop = PL_curcop;
431 c->top_env = PL_top_env;
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
534static void 676static size_t
535allocate_stack (Coro__State ctx, int alloc) 677coro_rss (pTHX_ struct coro *coro)
536{ 678{
537 coro_stack *stack; 679 size_t rss = sizeof (*coro);
538 680
539 New (0, stack, 1, coro_stack); 681 if (coro->mainstack)
540
541 stack->refcnt = 1;
542 stack->usecnt = 1;
543 stack->gencnt = ctx->gencnt = 0;
544
545 if (alloc)
546 { 682 {
547#if HAVE_MMAP 683 perl_slots tmp_slot;
548 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 684 perl_slots *slot;
549 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 685
550 if (stack->sptr != (void *)-1) 686 if (coro->flags & CF_RUNNING)
551 { 687 {
552# if STACKGUARD 688 slot = &tmp_slot;
553 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 689
554# endif 690 #define VAR(name,type) slot->name = PL_ ## name;
691 # include "state.h"
692 #undef VAR
555 } 693 }
556 else 694 else
557#endif 695 slot = coro->slot;
696
697 if (slot)
558 { 698 {
559 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 699 rss += sizeof (slot->curstackinfo);
560 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
561 } 710 }
562 } 711 }
563 else
564 stack->sptr = 0;
565 712
566 ctx->stack = stack; 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;
567} 811}
568 812
569static void 813static void
570deallocate_stack (Coro__State ctx) 814coro_setup (pTHX_ struct coro *coro)
571{
572 coro_stack *stack = ctx->stack;
573
574 ctx->stack = 0;
575
576 if (stack)
577 {
578 if (!--stack->refcnt)
579 {
580#ifdef HAVE_MMAP
581 if (stack->ssize > 0 && stack->sptr)
582 munmap (stack->sptr, stack->ssize);
583 else
584#endif
585 Safefree (stack->sptr);
586
587 Safefree (stack);
588 }
589 else if (ctx->gencnt == stack->gencnt)
590 --stack->usecnt;
591 }
592}
593
594static void
595setup_coro (void *arg)
596{ 815{
597 /* 816 /*
598 * emulate part of the perl startup here. 817 * emulate part of the perl startup here.
599 */ 818 */
600 dTHX;
601 dSP;
602 Coro__State ctx = (Coro__State)arg;
603 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
604
605 coro_init_stacks (aTHX); 819 coro_init_stacks (aTHX);
606 /*PL_curcop = 0;*/ 820
607 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 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));
608 SvREFCNT_dec (GvAV (PL_defgv)); 890 SvREFCNT_dec (GvAV (PL_defgv));
609 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 891 SvREFCNT_dec (GvSV (PL_errgv));
892 SvREFCNT_dec (PL_defoutgv);
893 SvREFCNT_dec (PL_rs);
894 SvREFCNT_dec (GvSV (irsgv));
610 895
611 SPAGAIN; 896 SvREFCNT_dec (PL_diehook);
897 SvREFCNT_dec (PL_warnhook);
898
899 SvREFCNT_dec (coro->saved_deffh);
900 SvREFCNT_dec (coro->throw);
612 901
613 if (ctx->stack) 902 coro_destruct_stacks (aTHX);
614 { 903}
615 ctx->cursp = 0;
616 904
617 PUSHMARK(SP); 905INLINE void
618 PUTBACK; 906free_coro_mortal (pTHX)
619 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 907{
620 908 if (expect_true (coro_mortal))
621 if (SvTRUE (ERRSV))
622 croak (NULL);
623 else
624 croak ("FATAL: CCTXT coroutine returned!");
625 } 909 {
626 else 910 SvREFCNT_dec (coro_mortal);
911 coro_mortal = 0;
627 { 912 }
628 UNOP myop; 913}
629 914
630 PL_op = (OP *)&myop; 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;
631 922
632 Zero(&myop, 1, UNOP); 923 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
633 myop.op_next = Nullop;
634 myop.op_flags = OPf_WANT_VOID;
635
636 PUSHMARK(SP);
637 XPUSHs (sub_init);
638 /*
639 * the next line is slightly wrong, as PL_op->op_next
640 * is actually being executed so we skip the first op.
641 * that doesn't matter, though, since it is only
642 * pp_nextstate and we never return...
643 * ah yes, and I don't care anyways ;)
644 */
645 PUTBACK;
646 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
647 SPAGAIN;
648
649 ENTER; /* necessary e.g. for dounwind */
650 } 924 {
651} 925 PERL_ASYNC_CHECK ();
652 926
653static void 927 if (cctx->flags & CC_TRACE_ALL)
654continue_coro (void *arg)
655{
656 /*
657 * this is a _very_ stripped down perl interpreter ;)
658 */
659 dTHX;
660 Coro__State ctx = (Coro__State)arg;
661
662 PL_top_env = &ctx->start_env;
663
664 ctx->cursp = 0;
665 PL_op = PL_op->op_next;
666 CALLRUNOPS(aTHX);
667
668 abort ();
669}
670
671static void
672transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
673{
674 dSTACKLEVEL;
675
676 if (prev != next)
677 {
678 if (next->mainstack)
679 { 928 {
680 LOCK; 929 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
681 SAVE (prev, flags);
682 LOAD (next);
683 UNLOCK;
684
685 /* mark this state as in-use */
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 { 930 {
692 if (!prev->stack) 931 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
693 allocate_stack (prev, 0); 932 SV **bot, **top;
694 else if (prev->cursp != stacklevel 933 AV *av = newAV (); /* return values */
695 && prev->stack->usecnt > 1) 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)
696 { 973 {
697 prev->gencnt = ++prev->stack->gencnt; 974 SV **cb;
698 prev->stack->usecnt = 1;
699 }
700 975
701 /* has our stack been invalidated? */ 976 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 { 977 {
704 deallocate_stack (next); 978 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
705 allocate_stack (next, 1); 979
706 coro_create (&(next->stack->cctx), 980 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
707 continue_coro, (void *)next, 981 {
708 next->stack->sptr, labs (next->stack->ssize)); 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;
709 } 1008 }
710 1009
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1010 if (cctx->flags & CC_TRACE_LINE)
712 prev->cursp = stacklevel;
713 /* don't add any code here */
714 }
715 else
716 next->cursp = stacklevel;
717 }
718 else if (next->tmps_ix == -2)
719 croak ("tried to transfer to running coroutine");
720 else
721 {
722 LOCK;
723 SAVE (prev, -1); /* first get rid of the old state */
724 UNLOCK;
725
726 if (flags & TRANSFER_SAVE_CCTXT)
727 {
728 if (!prev->stack)
729 allocate_stack (prev, 0);
730
731 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732 { 1011 {
733 PL_top_env = &next->start_env; 1012 dSP;
734 1013
735 setup_coro (next); 1014 PL_runops = RUNOPS_DEFAULT;
736 next->cursp = stacklevel; 1015 ENTER;
737 1016 SAVETMPS;
738 prev->stack->refcnt++; 1017 EXTEND (SP, 3);
739 prev->stack->usecnt++; 1018 PL_runops = RUNOPS_DEFAULT;
740 next->stack = prev->stack; 1019 PUSHMARK (SP);
741 next->gencnt = prev->gencnt; 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;
742 } 1029 }
743 else
744 {
745 assert (!next->stack);
746 allocate_stack (next, 1);
747 coro_create (&(next->stack->cctx),
748 setup_coro, (void *)next,
749 next->stack->sptr, labs (next->stack->ssize));
750 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751 prev->cursp = stacklevel;
752 /* don't add any code here */
753 } 1030 }
754 } 1031 }
755 else
756 {
757 setup_coro (next);
758 next->cursp = stacklevel;
759 }
760 } 1032 }
761 } 1033 }
762 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{
1053 dSP;
1054 UNOP myop;
1055
1056 PL_top_env = &PL_start_env;
1057
1058 if (cctx->flags & CC_TRACE)
1059 PL_runops = runops_trace;
1060
1061 Zero (&myop, 1, UNOP);
1062 myop.op_next = PL_op;
1063 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
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;
1070 PL_op = (OP *)&myop;
1071 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1072 SPAGAIN;
1073}
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 */
1099static void
1100cctx_run (void *arg)
1101{
1102#ifdef USE_ITHREADS
1103# if CORO_PTHREAD
1104 PERL_SET_CONTEXT (coro_thx);
1105# endif
1106#endif
1107 {
1108 dTHX;
1109
1110 /* entersub called ENTER, but we never 'returned', undo that here */
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)
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;
1210}
1211
1212static void
1213cctx_destroy (coro_cctx *cctx)
1214{
1215 if (!cctx)
1216 return;
1217
1218 --cctx_count;
1219 coro_destroy (&cctx->cctx);
1220
1221 /* coro_transfer creates new, empty cctx's */
1222 if (cctx->sptr)
1223 {
1224 #if CORO_USE_VALGRIND
1225 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1226 #endif
1227
1228#if HAVE_MMAP
1229 if (cctx->flags & CC_MAPPED)
1230 munmap (cctx->sptr, cctx->ssize);
1231 else
1232#endif
1233 Safefree (cctx->sptr);
1234 }
1235
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))
1246 {
1247 coro_cctx *cctx = cctx_first;
1248 cctx_first = cctx->next;
1249 --cctx_idle;
1250
1251 if (expect_true (!CCTX_EXPIRED (cctx)))
1252 return cctx;
1253
1254 cctx_destroy (cctx);
1255 }
1256
1257 return cctx_new_run ();
1258}
1259
1260static void
1261cctx_put (coro_cctx *cctx)
1262{
1263 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1264
1265 /* free another cctx if overlimit */
1266 if (expect_false (cctx_idle >= cctx_max_idle))
1267 {
1268 coro_cctx *first = cctx_first;
1269 cctx_first = first->next;
1270 --cctx_idle;
1271
1272 cctx_destroy (first);
1273 }
1274
1275 ++cctx_idle;
1276 cctx->next = cctx_first;
1277 cctx_first = cctx;
1278}
1279
1280/** coroutine switching *****************************************************/
1281
1282static void
1283transfer_check (pTHX_ struct coro *prev, struct coro *next)
1284{
1285 if (expect_true (prev != next))
1286 {
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");
1289
1290 if (expect_false (next->flags & CF_RUNNING))
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
1305transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1306{
1307 dSTACKLEVEL;
1308
1309 /* sometimes transfer is only called to set idle_sp */
1310 if (expect_false (!next))
1311 {
1312 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1313 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1314 }
1315 else if (expect_true (prev != next))
1316 {
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;
1329
1330 LOCK;
1331
1332 /* first get rid of the old state */
1333 save_perl (aTHX_ prev);
1334
1335 if (expect_false (next->flags & CF_NEW))
1336 {
1337 /* need to start coroutine */
1338 next->flags &= ~CF_NEW;
1339 /* setup coroutine call */
1340 coro_setup (aTHX_ next);
1341 }
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 ))
1353 {
1354 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1355 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1356
1357 prev->cctx = 0;
1358
1359 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
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);
1366 }
1367
1368 ++next->usecount;
1369
1370 if (expect_true (!next->cctx))
1371 next->cctx = cctx_get (aTHX);
1372
1373 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1374 transfer_next = next;
1375
1376 if (expect_false (prev__cctx != next->cctx))
1377 {
1378 prev__cctx->top_env = PL_top_env;
1379 PL_top_env = next->cctx->top_env;
1380 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1381 }
1382
1383 transfer_tail (aTHX);
1384 }
1385}
1386
1387#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1388#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1389
1390/** high level stuff ********************************************************/
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;
1406 UNLOCK;
1407 }
1408 else
1409 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1410
1411 if (coro->mainstack && coro->mainstack != main_mainstack)
1412 {
1413 struct coro temp;
1414
1415 if (coro->flags & CF_RUNNING)
1416 croak ("FATAL: tried to destroy currently running coroutine");
1417
1418 save_perl (aTHX_ &temp);
1419 load_perl (aTHX_ coro);
1420
1421 coro_destruct (aTHX_ coro);
1422
1423 load_perl (aTHX_ &temp);
1424
1425 coro->slot = 0;
1426 }
1427
1428 cctx_destroy (coro->cctx);
1429 SvREFCNT_dec (coro->args);
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;
1436}
1437
1438static int
1439coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1440{
1441 struct coro *coro = (struct coro *)mg->mg_ptr;
1442 mg->mg_ptr = 0;
1443
1444 coro->hv = 0;
1445
1446 if (--coro->refcnt < 0)
1447 {
1448 coro_state_destroy (aTHX_ coro);
1449 Safefree (coro);
1450 }
1451
1452 return 0;
1453}
1454
1455static int
1456coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1457{
1458 struct coro *coro = (struct coro *)mg->mg_ptr;
1459
1460 ++coro->refcnt;
1461
1462 return 0;
1463}
1464
1465static MGVTBL coro_state_vtbl = {
1466 0, 0, 0, 0,
1467 coro_state_free,
1468 0,
1469#ifdef MGf_DUP
1470 coro_state_dup,
1471#else
1472# define MGf_DUP 0
1473#endif
1474};
1475
1476static void
1477prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1478{
1479 ta->prev = SvSTATE (prev_sv);
1480 ta->next = SvSTATE (next_sv);
1481 TRANSFER_CHECK (*ta);
1482}
1483
1484static void
1485api_transfer (SV *prev_sv, SV *next_sv)
1486{
1487 dTHX;
1488 struct transfer_args ta;
1489
1490 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1491 TRANSFER (ta, 1);
1492}
1493
1494/** Coro ********************************************************************/
1495
1496static void
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)
1504{
1505 int prio;
1506
1507 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1508 if (AvFILLp (coro_ready [prio]) >= 0)
1509 return av_shift (coro_ready [prio]);
1510
1511 return 0;
1512}
1513
1514static int
1515api_ready (SV *coro_sv)
1516{
1517 dTHX;
1518 struct coro *coro;
1519 SV *sv_hook;
1520 void (*xs_hook)(void);
1521
1522 if (SvROK (coro_sv))
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;
1531
763 LOCK; 1532 LOCK;
764 if (coro_mortal) 1533
765 { 1534 sv_hook = coro_nready ? 0 : coro_readyhook;
766 SvREFCNT_dec (coro_mortal); 1535 xs_hook = coro_nready ? 0 : coroapi.readyhook;
767 coro_mortal = 0; 1536
768 } 1537 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1538 ++coro_nready;
1539
769 UNLOCK; 1540 UNLOCK;
770} 1541
771 1542 if (sv_hook)
772#define SV_CORO(sv,func) \
773 do { \
774 if (SvROK (sv)) \
775 sv = SvRV (sv); \
776 \
777 if (SvTYPE (sv) == SVt_PVHV) \
778 { \
779 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
780 \
781 if (!he) \
782 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
783 \
784 (sv) = SvRV (HeVAL(he)); \
785 } \
786 \
787 /* must also be changed inside Coro::Cont::yield */ \
788 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
789 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
790 \
791 } while(0)
792
793#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))
794
795static void
796api_transfer(pTHX_ SV *prev, SV *next, int flags)
797{
798 SV_CORO (prev, "Coro::transfer");
799 SV_CORO (next, "Coro::transfer");
800
801 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
802}
803
804/** Coro ********************************************************************/
805
806#define PRIO_MAX 3
807#define PRIO_HIGH 1
808#define PRIO_NORMAL 0
809#define PRIO_LOW -1
810#define PRIO_IDLE -3
811#define PRIO_MIN -4
812
813/* for Coro.pm */
814static GV *coro_current, *coro_idle;
815static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
816static int coro_nready;
817
818static void
819coro_enq (pTHX_ SV *sv)
820{
821 SV **xprio;
822 int prio;
823
824 if (SvTYPE (sv) != SVt_PVHV)
825 croak ("Coro::ready tried to enqueue something that is not a coroutine");
826
827 xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
828 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
829
830 prio = prio > PRIO_MAX ? PRIO_MAX
831 : prio < PRIO_MIN ? PRIO_MIN
832 : prio;
833
834 av_push (coro_ready [prio - PRIO_MIN], sv);
835 coro_nready++;
836}
837
838static SV *
839coro_deq (pTHX_ int min_prio)
840{
841 int prio = PRIO_MAX - PRIO_MIN;
842
843 min_prio -= PRIO_MIN;
844 if (min_prio < 0)
845 min_prio = 0;
846
847 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
848 if (av_len (coro_ready[prio]) >= 0)
849 { 1543 {
850 coro_nready--; 1544 dSP;
851 return av_shift (coro_ready[prio]); 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;
852 } 1556 }
853 1557
1558 if (xs_hook)
1559 xs_hook ();
1560
854 return 0; 1561 return 1;
855} 1562}
856 1563
857static void 1564static int
858api_ready (SV *coro) 1565api_is_ready (SV *coro_sv)
859{ 1566{
860 dTHX; 1567 dTHX;
861 1568
862 if (SvROK (coro)) 1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
863 coro = SvRV (coro); 1570}
1571
1572INLINE void
1573prepare_schedule (pTHX_ struct transfer_args *ta)
1574{
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);
864 1624
865 LOCK; 1625 LOCK;
866 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1626 free_coro_mortal (aTHX);
1627 coro_mortal = prev_sv;
867 UNLOCK; 1628 UNLOCK;
1629}
1630
1631INLINE void
1632prepare_cede (pTHX_ struct transfer_args *ta)
1633{
1634 api_ready (coro_current);
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;
868} 1650}
869 1651
870static void 1652static void
871api_schedule (void) 1653api_schedule (void)
872{ 1654{
873 dTHX; 1655 dTHX;
1656 struct transfer_args ta;
874 1657
875 SV *prev, *next; 1658 prepare_schedule (aTHX_ &ta);
1659 TRANSFER (ta, 1);
1660}
876 1661
877 LOCK; 1662static int
1663api_cede (void)
1664{
1665 dTHX;
1666 struct transfer_args ta;
878 1667
879 prev = SvRV (GvSV (coro_current)); 1668 prepare_cede (aTHX_ &ta);
880 next = coro_deq (aTHX_ PRIO_MIN);
881 1669
882 if (!next) 1670 if (expect_true (ta.prev != ta.next))
883 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1671 {
1672 TRANSFER (ta, 1);
1673 return 1;
1674 }
1675 else
1676 return 0;
1677}
884 1678
885 /* free this only after the transfer */ 1679static int
886 coro_mortal = prev; 1680api_cede_notself (void)
887 SV_CORO (prev, "Coro::schedule"); 1681{
1682 dTHX;
1683 struct transfer_args ta;
888 1684
889 SvRV (GvSV (coro_current)) = next; 1685 if (prepare_cede_notself (aTHX_ &ta))
890 1686 {
891 SV_CORO (next, "Coro::schedule"); 1687 TRANSFER (ta, 1);
892 1688 return 1;
893 UNLOCK; 1689 }
894 1690 else
895 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1691 return 0;
896 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
897} 1692}
898 1693
899static void 1694static void
900api_cede (void) 1695api_trace (SV *coro_sv, int flags)
901{ 1696{
902 dTHX; 1697 dTHX;
1698 struct coro *coro = SvSTATE (coro_sv);
903 1699
904 LOCK; 1700 if (flags & CC_TRACE)
905 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1701 {
906 UNLOCK; 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");
907 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 {
908 api_schedule (); 1774 api_cede ();
909} 1775 self->next = now + self->every;
1776 }
910 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
1895 TRANSFER (ta, 0);
1896 SPAGAIN;
1897
1898skip:
1899
1900 RETURN;
1901}
1902
911MODULE = Coro::State PACKAGE = Coro::State 1903MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
912 1904
913PROTOTYPES: ENABLE 1905PROTOTYPES: DISABLE
1906
1907# these not obviously related functions are all rolled into the same xs
1908# function to increase chances that they all will call transfer with the same
1909# stack offset
1910void
1911_set_stacklevel (...)
1912 ALIAS:
1913 Coro::State::transfer = 1
1914 Coro::schedule = 2
1915 Coro::cede = 3
1916 Coro::cede_notself = 4
1917 CODE:
1918{
1919 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1920
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}
914 1937
915BOOT: 1938BOOT:
916{ /* {} necessary for stoopid perl-5.6.x */ 1939{
917#ifdef USE_ITHREADS 1940#ifdef USE_ITHREADS
918 MUTEX_INIT (&coro_mutex); 1941 MUTEX_INIT (&coro_lock);
1942# if CORO_PTHREAD
1943 coro_thx = PERL_GET_CONTEXT;
1944# endif
919#endif 1945#endif
920 BOOT_PAGESIZE; 1946 BOOT_PAGESIZE;
921 1947
922 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1948 ssl_cv = get_cv ("Coro::State::_set_stacklevel", 0);
923 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 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
924 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1961 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
925 1962
926 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1963 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
927 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1964 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
928 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1965 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
929 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1966 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
930 1967
931 main_mainstack = PL_mainstack; 1968 main_mainstack = PL_mainstack;
1969 main_top_env = PL_top_env;
932 1970
1971 while (main_top_env->je_prev)
1972 main_top_env = main_top_env->je_prev;
1973
933 coroapi.ver = CORO_API_VERSION; 1974 coroapi.ver = CORO_API_VERSION;
1975 coroapi.rev = CORO_API_REVISION;
934 coroapi.transfer = api_transfer; 1976 coroapi.transfer = api_transfer;
935}
936 1977
937Coro::State 1978 {
938_newprocess(args) 1979 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
939 SV * args 1980
940 PROTOTYPE: $ 1981 if (!svp) croak ("Time::HiRes is required");
1982 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1983
1984 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1985 }
1986
1987 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1988}
1989
1990SV *
1991new (char *klass, ...)
941 CODE: 1992 CODE:
942 Coro__State coro; 1993{
1994 struct coro *coro;
1995 MAGIC *mg;
1996 HV *hv;
1997 int i;
943 1998
944 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
945 croak ("Coro::State::_newprocess expects an arrayref");
946
947 Newz (0, coro, 1, struct coro); 1999 Newz (0, coro, 1, struct coro);
2000 coro->args = newAV ();
2001 coro->flags = CF_NEW;
948 2002
949 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2003 if (coro_first) coro_first->prev = coro;
950 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 2004 coro->next = coro_first;
951 /*coro->stack = 0;*/ 2005 coro_first = coro;
952 2006
953 /* same as JMPENV_BOOTSTRAP */ 2007 coro->hv = hv = newHV ();
954 /* we might be able to recycle start_env, but safe is safe */ 2008 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
955 /*Zero(&coro->start_env, 1, JMPENV);*/ 2009 mg->mg_flags |= MGf_DUP;
956 coro->start_env.je_ret = -1; 2010 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
957 coro->start_env.je_mustcatch = TRUE;
958 2011
959 RETVAL = coro; 2012 av_extend (coro->args, items - 1);
2013 for (i = 1; i < items; i++)
2014 av_push (coro->args, newSVsv (ST (i)));
2015}
960 OUTPUT: 2016 OUTPUT:
961 RETVAL 2017 RETVAL
962 2018
2019bool
2020_destroy (SV *coro_sv)
2021 CODE:
2022 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2023 OUTPUT:
2024 RETVAL
2025
963void 2026void
964transfer(prev, next, flags)
965 SV *prev
966 SV *next
967 int flags
968 PROTOTYPE: @
969 CODE:
970 PUTBACK;
971 SV_CORO (next, "Coro::transfer");
972 SV_CORO (prev, "Coro::transfer");
973 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
974 SPAGAIN;
975
976void
977DESTROY(coro)
978 Coro::State coro
979 CODE:
980
981 if (coro->mainstack && coro->mainstack != main_mainstack)
982 {
983 struct coro temp;
984
985 PUTBACK;
986 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
987 LOAD (aTHX_ coro);
988 SPAGAIN;
989
990 destroy_stacks (aTHX);
991
992 LOAD ((&temp)); /* this will get rid of defsv etc.. */
993 SPAGAIN;
994
995 coro->mainstack = 0;
996 }
997
998 deallocate_stack (coro);
999 SvREFCNT_dec (coro->args);
1000 Safefree (coro);
1001
1002void
1003_exit(code) 2027_exit (int code)
1004 int code
1005 PROTOTYPE: $ 2028 PROTOTYPE: $
1006 CODE: 2029 CODE:
1007 _exit (code); 2030 _exit (code);
1008 2031
1009MODULE = Coro::State PACKAGE = Coro::Cont 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
1010 2043
1011# this is slightly dirty (should expose a c-level api) 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
1012 2066
1013void 2067void
1014yield(...) 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)
1015 PROTOTYPE: @ 2138 PROTOTYPE: $;$
1016 CODE: 2139 CODE:
1017 SV *yieldstack; 2140 SvREFCNT_dec (self->throw);
1018 SV *sv; 2141 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1019 AV *defav = GvAV (PL_defgv);
1020 struct coro *prev, *next;
1021 2142
1022 yieldstack = *hv_fetch ( 2143void
1023 (HV *)SvRV (GvSV (coro_current)), 2144api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1024 "yieldstack", sizeof ("yieldstack") - 1, 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;
1025 0 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
1026 ); 2191 {
2192 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2193 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1027 2194
1028 /* set up @_ -- ugly */ 2195 SV *tmp = *src; *src = *dst; *dst = tmp;
1029 av_clear (defav); 2196 }
1030 av_fill (defav, items - 1);
1031 while (items--)
1032 av_store (defav, items, SvREFCNT_inc (ST(items)));
1033
1034 sv = av_pop ((AV *)SvRV (yieldstack));
1035 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1036 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1037 SvREFCNT_dec (sv);
1038
1039 transfer (aTHX_ prev, next, 0);
1040 2197
1041MODULE = Coro::State PACKAGE = Coro 2198MODULE = Coro::State PACKAGE = Coro
1042 2199
1043# this is slightly dirty (should expose a c-level api)
1044
1045BOOT: 2200BOOT:
1046{ 2201{
1047 int i; 2202 int i;
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
1048 HV *stash = gv_stashpv ("Coro", TRUE); 2211 coro_stash = gv_stashpv ("Coro", TRUE);
1049 2212
1050 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2213 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2214 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2215 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2216 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2217 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2218 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056
1057 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059 2219
1060 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2220 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061 coro_ready[i] = newAV (); 2221 coro_ready[i] = newAV ();
1062 2222
1063 { 2223 {
1064 SV *sv = perl_get_sv("Coro::API", 1); 2224 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1065 2225
1066 coroapi.schedule = api_schedule; 2226 coroapi.schedule = api_schedule;
1067 coroapi.cede = api_cede; 2227 coroapi.cede = api_cede;
2228 coroapi.cede_notself = api_cede_notself;
1068 coroapi.ready = api_ready; 2229 coroapi.ready = api_ready;
2230 coroapi.is_ready = api_is_ready;
1069 coroapi.nready = &coro_nready; 2231 coroapi.nready = &coro_nready;
1070 coroapi.current = coro_current; 2232 coroapi.current = coro_current;
1071 2233
1072 GCoroAPI = &coroapi; 2234 GCoroAPI = &coroapi;
1073 sv_setiv(sv, (IV)&coroapi); 2235 sv_setiv (sv, (IV)&coroapi);
1074 SvREADONLY_on(sv); 2236 SvREADONLY_on (sv);
1075 } 2237 }
1076} 2238}
1077 2239
1078#if !PERL_MICRO
1079
1080void 2240void
1081ready(self) 2241_set_current (SV *current)
1082 SV * self
1083 PROTOTYPE: $ 2242 PROTOTYPE: $
1084 CODE: 2243 CODE:
1085 api_ready (self); 2244 SvREFCNT_dec (SvRV (coro_current));
2245 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1086 2246
1087#endif 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;
1088 2255
1089int 2256int
2257prio (Coro::State coro, int newprio = 0)
2258 ALIAS:
2259 nice = 1
2260 CODE:
2261{
2262 RETVAL = coro->prio;
2263
2264 if (items > 1)
2265 {
2266 if (ix)
2267 newprio = coro->prio - newprio;
2268
2269 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2270 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2271
2272 coro->prio = newprio;
2273 }
2274}
2275 OUTPUT:
2276 RETVAL
2277
2278SV *
2279ready (SV *self)
2280 PROTOTYPE: $
2281 CODE:
2282 RETVAL = boolSV (api_ready (self));
2283 OUTPUT:
2284 RETVAL
2285
2286int
1090nready(...) 2287nready (...)
1091 PROTOTYPE: 2288 PROTOTYPE:
1092 CODE: 2289 CODE:
1093 RETVAL = coro_nready; 2290 RETVAL = coro_nready;
1094 OUTPUT: 2291 OUTPUT:
1095 RETVAL 2292 RETVAL
1096 2293
2294# for async_pool speedup
1097void 2295void
1098schedule(...) 2296_pool_1 (SV *cb)
1099 PROTOTYPE:
1100 CODE: 2297 CODE:
1101 api_schedule (); 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}
1102 2334
1103void 2335void
1104cede(...) 2336_pool_2 (SV *cb)
1105 PROTOTYPE:
1106 CODE: 2337 CODE:
1107 api_cede (); 2338{
2339 struct coro *coro = SvSTATE (coro_current);
1108 2340
1109# and these are hacks 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 ();
2376
1110SV * 2377SV *
1111_aio_get_state () 2378gensub (SV *sub, ...)
1112 CODE: 2379 PROTOTYPE: &;@
2380 CODE:
1113{ 2381{
1114 struct { 2382 struct coro *coro;
1115 int errorno; 2383 MAGIC *mg;
1116 int laststype; 2384 CV *xcv;
1117 int laststatval; 2385 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1118 Stat_t statcache; 2386 int i;
1119 } data;
1120 2387
1121 data.errorno = errno; 2388 CvGV (ncv) = CvGV (cv);
1122 data.laststype = PL_laststype; 2389 CvFILE (ncv) = CvFILE (cv);
1123 data.laststatval = PL_laststatval;
1124 data.statcache = PL_statcache;
1125 2390
1126 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);
1127} 2409}
1128 OUTPUT: 2410 OUTPUT:
1129 RETVAL 2411 RETVAL
1130 2412
2413#endif
2414
2415
2416MODULE = Coro::State PACKAGE = Coro::AIO
2417
1131void 2418void
1132_aio_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)
1133 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: @
1134 CODE: 2475 CODE:
1135{ 2476{
1136 struct { 2477 static int incede;
1137 int errorno;
1138 int laststype;
1139 int laststatval;
1140 Stat_t statcache;
1141 } *data = (void *)data_;
1142 2478
1143 errno = data->errorno; 2479 api_cede_notself ();
1144 PL_laststype = data->laststype; 2480
1145 PL_laststatval = data->laststatval; 2481 ++incede;
1146 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;
1147} 2495}
2496
2497
2498MODULE = Coro::State PACKAGE = PerlIO::cede
2499
2500BOOT:
2501 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2502

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