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Comparing Coro/Coro/State.xs (file contents):
Revision 1.9 by root, Sat Jul 21 02:49:09 2001 UTC vs.
Revision 1.253 by root, Fri Nov 7 20:12:26 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#if 1 11#include "patchlevel.h"
6# define CHK(x) (void *)0 12
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
7#else 22#else
8# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) 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
9#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
10 48
11#define MAY_FLUSH /* increases codesize */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
12 55
13#define SUB_INIT "Coro::State::_newcoro" 56/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8
14 58
15#define SAVE_DEFAV 0x00000001 59#define PERL_VERSION_ATLEAST(a,b,c) \
16#define SAVE_DEFSV 0x00000002 60 (PERL_REVISION > (a) \
17#define SAVE_ERRSV 0x00000004 61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18 64
19#define SAVE_ALL -1 65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
20 85
86/* 5.11 */
87#ifndef CxHASARGS
88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
89#endif
90
91/* 5.10.0 */
92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
95
96/* 5.8.8 */
97#ifndef GV_NOTQUAL
98# define GV_NOTQUAL 0
99#endif
100#ifndef newSV
101# define newSV(l) NEWSV(0,l)
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#define dSTACKLEVEL volatile char stacklevel
125#define STACKLEVEL ((void *)&stacklevel)
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
133#else
134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147static perl_mutex coro_lock;
148# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
149# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
150#else
151# define LOCK (void)0
152# define UNLOCK (void)0
153#endif
154
155/* helper storage struct for Coro::AIO */
156struct io_state
157{
158 AV *res;
159 int errorno;
160 I32 laststype;
161 int laststatval;
162 Stat_t statcache;
163};
164
165static double (*nvtime)(); /* so why doesn't it take void? */
166
167static size_t coro_stacksize = CORO_STACKSIZE;
168static struct CoroAPI coroapi;
169static AV *main_mainstack; /* used to differentiate between $main and others */
170static JMPENV *main_top_env;
171static HV *coro_state_stash, *coro_stash;
172static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
173
174static GV *irsgv; /* $/ */
175static GV *stdoutgv; /* *STDOUT */
176static SV *rv_diehook;
177static SV *rv_warnhook;
178static HV *hv_sig; /* %SIG */
179
180/* async_pool helper stuff */
181static SV *sv_pool_rss;
182static SV *sv_pool_size;
183static AV *av_async_pool;
184
185/* Coro::AnyEvent */
186static SV *sv_activity;
187
188static struct coro_cctx *cctx_first;
189static int cctx_count, cctx_idle;
190
191enum {
192 CC_MAPPED = 0x01,
193 CC_NOREUSE = 0x02, /* throw this away after tracing */
194 CC_TRACE = 0x04,
195 CC_TRACE_SUB = 0x08, /* trace sub calls */
196 CC_TRACE_LINE = 0x10, /* trace each statement */
197 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
198};
199
200/* this is a structure representing a c-level coroutine */
201typedef struct coro_cctx {
202 struct coro_cctx *next;
203
204 /* the stack */
205 void *sptr;
206 size_t ssize;
207
208 /* cpu state */
209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
211 JMPENV *top_env;
212 coro_context cctx;
213
214#if CORO_USE_VALGRIND
215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
219
220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct {
229 SV *defsv;
230 AV *defav;
231 SV *errsv;
232 SV *irsgv;
233#define VAR(name,type) type name;
234# include "state.h"
235#undef VAR
236} perl_slots;
237
238#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
239
240/* this is a structure representing a perl-level coroutine */
21struct coro { 241struct coro {
22 /* optionally saved, might be zero */ 242 /* the c coroutine allocated to this perl coroutine, if any */
23 AV *defav; 243 coro_cctx *cctx;
24 SV *defsv;
25 SV *errsv;
26
27 /* saved global state not related to stacks */
28 U8 dowarn;
29 244
30 /* the stacks and related info (callchain etc..) */ 245 /* process data */
31 PERL_SI *curstackinfo;
32 AV *curstack;
33 AV *mainstack; 246 AV *mainstack;
34 SV **stack_sp; 247 perl_slots *slot; /* basically the saved sp */
35 OP *op;
36 SV **curpad;
37 SV **stack_base;
38 SV **stack_max;
39 SV **tmps_stack;
40 I32 tmps_floor;
41 I32 tmps_ix;
42 I32 tmps_max;
43 I32 *markstack;
44 I32 *markstack_ptr;
45 I32 *markstack_max;
46 I32 *scopestack;
47 I32 scopestack_ix;
48 I32 scopestack_max;
49 ANY *savestack;
50 I32 savestack_ix;
51 I32 savestack_max;
52 OP **retstack;
53 I32 retstack_ix;
54 I32 retstack_max;
55 COP *curcop;
56 248
57 /* data associated with this coroutine (initial args) */ 249 AV *args; /* data associated with this coroutine (initial args) */
58 AV *args; 250 int refcnt; /* coroutines are refcounted, yes */
251 int flags; /* CF_ flags */
252 HV *hv; /* the perl hash associated with this coro, if any */
253
254 /* statistics */
255 int usecount; /* number of transfers to this coro */
256
257 /* coro process data */
258 int prio;
259 SV *throw; /* exception to be thrown */
260
261 /* async_pool */
262 SV *saved_deffh;
263
264 /* linked list */
265 struct coro *next, *prev;
59}; 266};
60 267
61typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
62typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
63 270
64static HV *padlist_cache; 271/** Coro ********************************************************************/
65 272
66/* mostly copied from op.c:cv_clone2 */ 273#define PRIO_MAX 3
67STATIC AV * 274#define PRIO_HIGH 1
68clone_padlist (AV *protopadlist) 275#define PRIO_NORMAL 0
276#define PRIO_LOW -1
277#define PRIO_IDLE -3
278#define PRIO_MIN -4
279
280/* for Coro.pm */
281static SV *coro_current;
282static SV *coro_readyhook;
283static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
284static int coro_nready;
285static struct coro *coro_first;
286
287/** lowlevel stuff **********************************************************/
288
289static SV *
290coro_get_sv (pTHX_ const char *name, int create)
69{ 291{
70 AV *av; 292#if PERL_VERSION_ATLEAST (5,10,0)
71 I32 ix; 293 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
72 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 294 get_sv (name, create);
73 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 295#endif
74 SV **pname = AvARRAY (protopad_name); 296 return get_sv (name, create);
75 SV **ppad = AvARRAY (protopad); 297}
76 I32 fname = AvFILLp (protopad_name); 298
77 I32 fpad = AvFILLp (protopad); 299static AV *
300coro_get_av (pTHX_ const char *name, int create)
301{
302#if PERL_VERSION_ATLEAST (5,10,0)
303 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
304 get_av (name, create);
305#endif
306 return get_av (name, create);
307}
308
309static HV *
310coro_get_hv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_hv (name, create);
315#endif
316 return get_hv (name, create);
317}
318
319static AV *
320coro_clone_padlist (pTHX_ CV *cv)
321{
322 AV *padlist = CvPADLIST (cv);
78 AV *newpadlist, *newpad_name, *newpad; 323 AV *newpadlist, *newpad;
79 SV **npad;
80
81 newpad_name = newAV ();
82 for (ix = fname; ix >= 0; ix--)
83 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
84
85 newpad = newAV ();
86 av_fill (newpad, AvFILLp (protopad));
87 npad = AvARRAY (newpad);
88 324
89 newpadlist = newAV (); 325 newpadlist = newAV ();
90 AvREAL_off (newpadlist); 326 AvREAL_off (newpadlist);
91 av_store (newpadlist, 0, (SV *) newpad_name); 327#if PERL_VERSION_ATLEAST (5,10,0)
328 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
329#else
330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
331#endif
332 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
333 --AvFILLp (padlist);
334
335 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
92 av_store (newpadlist, 1, (SV *) newpad); 336 av_store (newpadlist, 1, (SV *)newpad);
93 337
94 av = newAV (); /* will be @_ */ 338 return newpadlist;
95 av_extend (av, 0); 339}
96 av_store (newpad, 0, (SV *) av);
97 AvFLAGS (av) = AVf_REIFY;
98 340
99 for (ix = fpad; ix > 0; ix--) 341static void
342free_padlist (pTHX_ AV *padlist)
343{
344 /* may be during global destruction */
345 if (SvREFCNT (padlist))
100 { 346 {
101 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 347 I32 i = AvFILLp (padlist);
102 if (namesv && namesv != &PL_sv_undef) 348 while (i >= 0)
103 { 349 {
104 char *name = SvPVX (namesv); /* XXX */ 350 SV **svp = av_fetch (padlist, i--, FALSE);
105 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 351 if (svp)
106 { /* lexical from outside? */
107 npad[ix] = SvREFCNT_inc (ppad[ix]);
108 } 352 {
109 else
110 { /* our own lexical */
111 SV *sv; 353 SV *sv;
112 if (*name == '&') 354 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
113 sv = SvREFCNT_inc (ppad[ix]); 355 SvREFCNT_dec (sv);
114 else if (*name == '@') 356
115 sv = (SV *) newAV (); 357 SvREFCNT_dec (*svp);
116 else if (*name == '%')
117 sv = (SV *) newHV ();
118 else
119 sv = NEWSV (0, 0);
120 if (!SvPADBUSY (sv))
121 SvPADMY_on (sv);
122 npad[ix] = sv;
123 } 358 }
124 } 359 }
125 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
126 {
127 npad[ix] = SvREFCNT_inc (ppad[ix]);
128 }
129 else
130 {
131 SV *sv = NEWSV (0, 0);
132 SvPADTMP_on (sv);
133 npad[ix] = sv;
134 }
135 }
136 360
137#if 0 /* return -ENOTUNDERSTOOD */
138 /* Now that vars are all in place, clone nested closures. */
139
140 for (ix = fpad; ix > 0; ix--) {
141 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
142 if (namesv
143 && namesv != &PL_sv_undef
144 && !(SvFLAGS(namesv) & SVf_FAKE)
145 && *SvPVX(namesv) == '&'
146 && CvCLONE(ppad[ix]))
147 {
148 CV *kid = cv_clone((CV*)ppad[ix]);
149 SvREFCNT_dec(ppad[ix]);
150 CvCLONE_on(kid);
151 SvPADMY_on(kid);
152 npad[ix] = (SV*)kid;
153 }
154 }
155#endif
156
157 return newpadlist;
158}
159
160#ifdef MAY_FLUSH
161STATIC AV *
162free_padlist (AV *padlist)
163{
164 /* may be during global destruction */
165 if (SvREFCNT(padlist))
166 {
167 I32 i = AvFILLp(padlist);
168 while (i >= 0)
169 {
170 SV **svp = av_fetch(padlist, i--, FALSE);
171 SV *sv = svp ? *svp : Nullsv;
172 if (sv)
173 SvREFCNT_dec(sv);
174 }
175
176 SvREFCNT_dec((SV*)padlist); 361 SvREFCNT_dec ((SV*)padlist);
177 } 362 }
178} 363}
179#endif 364
365static int
366coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
367{
368 AV *padlist;
369 AV *av = (AV *)mg->mg_obj;
370
371 /* casting is fun. */
372 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
373 free_padlist (aTHX_ padlist);
374
375 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
376
377 return 0;
378}
379
380#define CORO_MAGIC_type_cv PERL_MAGIC_ext
381#define CORO_MAGIC_type_state PERL_MAGIC_ext
382
383static MGVTBL coro_cv_vtbl = {
384 0, 0, 0, 0,
385 coro_cv_free
386};
387
388#define CORO_MAGIC(sv, type) \
389 SvMAGIC (sv) \
390 ? SvMAGIC (sv)->mg_type == type \
391 ? SvMAGIC (sv) \
392 : mg_find (sv, type) \
393 : 0
394
395#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
396#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
397
398static struct coro *
399SvSTATE_ (pTHX_ SV *coro)
400{
401 HV *stash;
402 MAGIC *mg;
403
404 if (SvROK (coro))
405 coro = SvRV (coro);
406
407 if (expect_false (SvTYPE (coro) != SVt_PVHV))
408 croak ("Coro::State object required");
409
410 stash = SvSTASH (coro);
411 if (expect_false (stash != coro_stash && stash != coro_state_stash))
412 {
413 /* very slow, but rare, check */
414 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
415 croak ("Coro::State object required");
416 }
417
418 mg = CORO_MAGIC_state (coro);
419 return (struct coro *)mg->mg_ptr;
420}
421
422#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
180 423
181/* the next two functions merely cache the padlists */ 424/* the next two functions merely cache the padlists */
182STATIC void 425static void
183get_padlist (CV *cv) 426get_padlist (pTHX_ CV *cv)
184{ 427{
185 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 428 MAGIC *mg = CORO_MAGIC_cv (cv);
429 AV *av;
186 430
187 if (he && AvFILLp ((AV *)*he) >= 0) 431 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
188 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 432 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
189 else 433 else
190 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
191}
192
193STATIC void
194put_padlist (CV *cv)
195{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
197
198 if (SvTYPE (*he) != SVt_PVAV)
199 { 434 {
435#if CORO_PREFER_PERL_FUNCTIONS
436 /* this is probably cleaner? but also slower! */
437 /* in practise, it seems to be less stable */
438 CV *cp = Perl_cv_clone (cv);
439 CvPADLIST (cv) = CvPADLIST (cp);
440 CvPADLIST (cp) = 0;
200 SvREFCNT_dec (*he); 441 SvREFCNT_dec (cp);
201 *he = (SV *)newAV (); 442#else
443 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
444#endif
202 } 445 }
203
204 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
205} 446}
206
207#ifdef MAY_FLUSH
208STATIC void
209flush_padlist_cache ()
210{
211 HV *hv = padlist_cache;
212 padlist_cache = newHV ();
213
214 if (hv_iterinit (hv))
215 {
216 HE *he;
217 AV *padlist;
218
219 while (!!(he = hv_iternext (hv)))
220 {
221 AV *av = (AV *)HeVAL(he);
222
223 /* casting is fun. */
224 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
225 free_padlist (padlist);
226 }
227 }
228
229 SvREFCNT_dec (hv);
230}
231#endif
232
233#define SB do {
234#define SE } while (0)
235
236#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE
237#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE
238
239#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
240 447
241static void 448static void
449put_padlist (pTHX_ CV *cv)
450{
451 MAGIC *mg = CORO_MAGIC_cv (cv);
452 AV *av;
453
454 if (expect_false (!mg))
455 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
456
457 av = (AV *)mg->mg_obj;
458
459 if (expect_false (AvFILLp (av) >= AvMAX (av)))
460 av_extend (av, AvMAX (av) + 1);
461
462 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
463}
464
465/** load & save, init *******************************************************/
466
467static void
242load_state(pTHX_ Coro__State c) 468load_perl (pTHX_ Coro__State c)
243{ 469{
244 PL_dowarn = c->dowarn; 470 perl_slots *slot = c->slot;
471 c->slot = 0;
245 472
246 PL_curstackinfo = c->curstackinfo;
247 PL_curstack = c->curstack;
248 PL_mainstack = c->mainstack; 473 PL_mainstack = c->mainstack;
249 PL_stack_sp = c->stack_sp;
250 PL_op = c->op;
251 PL_curpad = c->curpad;
252 PL_stack_base = c->stack_base;
253 PL_stack_max = c->stack_max;
254 PL_tmps_stack = c->tmps_stack;
255 PL_tmps_floor = c->tmps_floor;
256 PL_tmps_ix = c->tmps_ix;
257 PL_tmps_max = c->tmps_max;
258 PL_markstack = c->markstack;
259 PL_markstack_ptr = c->markstack_ptr;
260 PL_markstack_max = c->markstack_max;
261 PL_scopestack = c->scopestack;
262 PL_scopestack_ix = c->scopestack_ix;
263 PL_scopestack_max = c->scopestack_max;
264 PL_savestack = c->savestack;
265 PL_savestack_ix = c->savestack_ix;
266 PL_savestack_max = c->savestack_max;
267 PL_retstack = c->retstack;
268 PL_retstack_ix = c->retstack_ix;
269 PL_retstack_max = c->retstack_max;
270 PL_curcop = c->curcop;
271 474
272 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 475 GvSV (PL_defgv) = slot->defsv;
273 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 476 GvAV (PL_defgv) = slot->defav;
274 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 477 GvSV (PL_errgv) = slot->errsv;
478 GvSV (irsgv) = slot->irsgv;
479
480 #define VAR(name,type) PL_ ## name = slot->name;
481 # include "state.h"
482 #undef VAR
275 483
276 { 484 {
277 dSP; 485 dSP;
486
278 CV *cv; 487 CV *cv;
279 488
280 /* now do the ugly restore mess */ 489 /* now do the ugly restore mess */
281 while ((cv = (CV *)POPs)) 490 while (expect_true (cv = (CV *)POPs))
282 { 491 {
283 AV *padlist = (AV *)POPs;
284
285 if (padlist)
286 {
287 put_padlist (cv); /* mark this padlist as available */ 492 put_padlist (aTHX_ cv); /* mark this padlist as available */
288 CvPADLIST(cv) = padlist; 493 CvDEPTH (cv) = PTR2IV (POPs);
289#ifdef USE_THREADS 494 CvPADLIST (cv) = (AV *)POPs;
290 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
291#endif
292 }
293
294 ++CvDEPTH(cv);
295 } 495 }
296 496
297 PUTBACK; 497 PUTBACK;
298 } 498 }
299} 499}
300 500
301static void 501static void
302save_state(pTHX_ Coro__State c, int flags) 502save_perl (pTHX_ Coro__State c)
303{ 503{
304 { 504 {
305 dSP; 505 dSP;
306 I32 cxix = cxstack_ix; 506 I32 cxix = cxstack_ix;
507 PERL_CONTEXT *ccstk = cxstack;
307 PERL_SI *top_si = PL_curstackinfo; 508 PERL_SI *top_si = PL_curstackinfo;
308 PERL_CONTEXT *ccstk = cxstack;
309 509
310 /* 510 /*
311 * the worst thing you can imagine happens first - we have to save 511 * the worst thing you can imagine happens first - we have to save
312 * (and reinitialize) all cv's in the whole callchain :( 512 * (and reinitialize) all cv's in the whole callchain :(
313 */ 513 */
314 514
315 PUSHs (Nullsv); 515 XPUSHs (Nullsv);
316 /* this loop was inspired by pp_caller */ 516 /* this loop was inspired by pp_caller */
317 for (;;) 517 for (;;)
318 { 518 {
319 do 519 while (expect_true (cxix >= 0))
320 { 520 {
321 PERL_CONTEXT *cx = &ccstk[cxix--]; 521 PERL_CONTEXT *cx = &ccstk[cxix--];
322 522
323 if (CxTYPE(cx) == CXt_SUB) 523 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
324 { 524 {
325 CV *cv = cx->blk_sub.cv; 525 CV *cv = cx->blk_sub.cv;
526
326 if (CvDEPTH(cv)) 527 if (expect_true (CvDEPTH (cv)))
327 { 528 {
328#ifdef USE_THREADS
329 /*XPUSHs ((SV *)CvOWNER(cv));*/
330 /*CvOWNER(cv) = 0;*/
331 /*error must unlock this cv etc.. etc...*/
332#endif
333 EXTEND (SP, CvDEPTH(cv)*2); 529 EXTEND (SP, 3);
334
335 while (--CvDEPTH(cv))
336 {
337 /* this tells the restore code to increment CvDEPTH */
338 PUSHs (Nullsv);
339 PUSHs ((SV *)cv);
340 }
341
342 PUSHs ((SV *)CvPADLIST(cv)); 530 PUSHs ((SV *)CvPADLIST (cv));
531 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
343 PUSHs ((SV *)cv); 532 PUSHs ((SV *)cv);
344 533
345 get_padlist (cv); /* this is a monster */ 534 CvDEPTH (cv) = 0;
535 get_padlist (aTHX_ cv);
346 } 536 }
347 } 537 }
348 else if (CxTYPE(cx) == CXt_FORMAT) 538 }
539
540 if (expect_true (top_si->si_type == PERLSI_MAIN))
541 break;
542
543 top_si = top_si->si_prev;
544 ccstk = top_si->si_cxstack;
545 cxix = top_si->si_cxix;
546 }
547
548 PUTBACK;
549 }
550
551 /* allocate some space on the context stack for our purposes */
552 /* we manually unroll here, as usually 2 slots is enough */
553 if (SLOT_COUNT >= 1) CXINC;
554 if (SLOT_COUNT >= 2) CXINC;
555 if (SLOT_COUNT >= 3) CXINC;
556 {
557 int i;
558 for (i = 3; i < SLOT_COUNT; ++i)
559 CXINC;
560 }
561 cxstack_ix -= SLOT_COUNT; /* undo allocation */
562
563 c->mainstack = PL_mainstack;
564
565 {
566 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
567
568 slot->defav = GvAV (PL_defgv);
569 slot->defsv = DEFSV;
570 slot->errsv = ERRSV;
571 slot->irsgv = GvSV (irsgv);
572
573 #define VAR(name,type) slot->name = PL_ ## name;
574 # include "state.h"
575 #undef VAR
576 }
577}
578
579/*
580 * allocate various perl stacks. This is an exact copy
581 * of perl.c:init_stacks, except that it uses less memory
582 * on the (sometimes correct) assumption that coroutines do
583 * not usually need a lot of stackspace.
584 */
585#if CORO_PREFER_PERL_FUNCTIONS
586# define coro_init_stacks init_stacks
587#else
588static void
589coro_init_stacks (pTHX)
590{
591 PL_curstackinfo = new_stackinfo(32, 8);
592 PL_curstackinfo->si_type = PERLSI_MAIN;
593 PL_curstack = PL_curstackinfo->si_stack;
594 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
595
596 PL_stack_base = AvARRAY(PL_curstack);
597 PL_stack_sp = PL_stack_base;
598 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
599
600 New(50,PL_tmps_stack,32,SV*);
601 PL_tmps_floor = -1;
602 PL_tmps_ix = -1;
603 PL_tmps_max = 32;
604
605 New(54,PL_markstack,16,I32);
606 PL_markstack_ptr = PL_markstack;
607 PL_markstack_max = PL_markstack + 16;
608
609#ifdef SET_MARK_OFFSET
610 SET_MARK_OFFSET;
611#endif
612
613 New(54,PL_scopestack,8,I32);
614 PL_scopestack_ix = 0;
615 PL_scopestack_max = 8;
616
617 New(54,PL_savestack,24,ANY);
618 PL_savestack_ix = 0;
619 PL_savestack_max = 24;
620
621#if !PERL_VERSION_ATLEAST (5,10,0)
622 New(54,PL_retstack,4,OP*);
623 PL_retstack_ix = 0;
624 PL_retstack_max = 4;
625#endif
626}
627#endif
628
629/*
630 * destroy the stacks, the callchain etc...
631 */
632static void
633coro_destruct_stacks (pTHX)
634{
635 while (PL_curstackinfo->si_next)
636 PL_curstackinfo = PL_curstackinfo->si_next;
637
638 while (PL_curstackinfo)
639 {
640 PERL_SI *p = PL_curstackinfo->si_prev;
641
642 if (!IN_DESTRUCT)
643 SvREFCNT_dec (PL_curstackinfo->si_stack);
644
645 Safefree (PL_curstackinfo->si_cxstack);
646 Safefree (PL_curstackinfo);
647 PL_curstackinfo = p;
648 }
649
650 Safefree (PL_tmps_stack);
651 Safefree (PL_markstack);
652 Safefree (PL_scopestack);
653 Safefree (PL_savestack);
654#if !PERL_VERSION_ATLEAST (5,10,0)
655 Safefree (PL_retstack);
656#endif
657}
658
659static size_t
660coro_rss (pTHX_ struct coro *coro)
661{
662 size_t rss = sizeof (*coro);
663
664 if (coro->mainstack)
665 {
666 perl_slots tmp_slot;
667 perl_slots *slot;
668
669 if (coro->flags & CF_RUNNING)
670 {
671 slot = &tmp_slot;
672
673 #define VAR(name,type) slot->name = PL_ ## name;
674 # include "state.h"
675 #undef VAR
676 }
677 else
678 slot = coro->slot;
679
680 if (slot)
681 {
682 rss += sizeof (slot->curstackinfo);
683 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
684 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
685 rss += slot->tmps_max * sizeof (SV *);
686 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
687 rss += slot->scopestack_max * sizeof (I32);
688 rss += slot->savestack_max * sizeof (ANY);
689
690#if !PERL_VERSION_ATLEAST (5,10,0)
691 rss += slot->retstack_max * sizeof (OP *);
692#endif
693 }
694 }
695
696 return rss;
697}
698
699/** coroutine stack handling ************************************************/
700
701static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
702static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
703static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
704
705/* apparently < 5.8.8 */
706#ifndef MgPV_nolen_const
707#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
708 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
709 (const char*)(mg)->mg_ptr)
710#endif
711
712/*
713 * This overrides the default magic get method of %SIG elements.
714 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
715 * and instead of tryign to save and restore the hash elements, we just provide
716 * readback here.
717 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
718 * not expecting this to actually change the hook. This is a potential problem
719 * when a schedule happens then, but we ignore this.
720 */
721static int
722coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
723{
724 const char *s = MgPV_nolen_const (mg);
725
726 if (*s == '_')
727 {
728 SV **svp = 0;
729
730 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
731 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
732
733 if (svp)
734 {
735 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
736 return 0;
737 }
738 }
739
740 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
741}
742
743static int
744coro_sigelem_clr (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 *old = *svp;
758 *svp = 0;
759 SvREFCNT_dec (old);
760 return 0;
761 }
762 }
763
764 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
765}
766
767static int
768coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771
772 if (*s == '_')
773 {
774 SV **svp = 0;
775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 SV *old = *svp;
782 *svp = newSVsv (sv);
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
789}
790
791static void
792coro_setup (pTHX_ struct coro *coro)
793{
794 /*
795 * emulate part of the perl startup here.
796 */
797 coro_init_stacks (aTHX);
798
799 PL_runops = RUNOPS_DEFAULT;
800 PL_curcop = &PL_compiling;
801 PL_in_eval = EVAL_NULL;
802 PL_comppad = 0;
803 PL_curpm = 0;
804 PL_curpad = 0;
805 PL_localizing = 0;
806 PL_dirty = 0;
807 PL_restartop = 0;
808#if PERL_VERSION_ATLEAST (5,10,0)
809 PL_parser = 0;
810#endif
811
812 /* recreate the die/warn hooks */
813 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
814 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
815
816 GvSV (PL_defgv) = newSV (0);
817 GvAV (PL_defgv) = coro->args; coro->args = 0;
818 GvSV (PL_errgv) = newSV (0);
819 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
820 PL_rs = newSVsv (GvSV (irsgv));
821 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
822
823 {
824 dSP;
825 LOGOP myop;
826
827 Zero (&myop, 1, LOGOP);
828 myop.op_next = Nullop;
829 myop.op_flags = OPf_WANT_VOID;
830
831 PUSHMARK (SP);
832 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
833 PUTBACK;
834 PL_op = (OP *)&myop;
835 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
836 SPAGAIN;
837 }
838
839 /* this newly created coroutine might be run on an existing cctx which most
840 * likely was suspended in set_stacklevel, called from entersub.
841 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
842 * so we ENTER here for symmetry
843 */
844 ENTER;
845}
846
847static void
848coro_destruct (pTHX_ struct coro *coro)
849{
850 if (!IN_DESTRUCT)
851 {
852 /* restore all saved variables and stuff */
853 LEAVE_SCOPE (0);
854 assert (PL_tmps_floor == -1);
855
856 /* free all temporaries */
857 FREETMPS;
858 assert (PL_tmps_ix == -1);
859
860 /* unwind all extra stacks */
861 POPSTACK_TO (PL_mainstack);
862
863 /* unwind main stack */
864 dounwind (-1);
865 }
866
867 SvREFCNT_dec (GvSV (PL_defgv));
868 SvREFCNT_dec (GvAV (PL_defgv));
869 SvREFCNT_dec (GvSV (PL_errgv));
870 SvREFCNT_dec (PL_defoutgv);
871 SvREFCNT_dec (PL_rs);
872 SvREFCNT_dec (GvSV (irsgv));
873
874 SvREFCNT_dec (PL_diehook);
875 SvREFCNT_dec (PL_warnhook);
876
877 SvREFCNT_dec (coro->saved_deffh);
878 SvREFCNT_dec (coro->throw);
879
880 coro_destruct_stacks (aTHX);
881}
882
883static void
884free_coro_mortal (pTHX)
885{
886 if (expect_true (coro_mortal))
887 {
888 SvREFCNT_dec (coro_mortal);
889 coro_mortal = 0;
890 }
891}
892
893static int
894runops_trace (pTHX)
895{
896 COP *oldcop = 0;
897 int oldcxix = -2;
898 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
899 coro_cctx *cctx = coro->cctx;
900
901 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
902 {
903 PERL_ASYNC_CHECK ();
904
905 if (cctx->flags & CC_TRACE_ALL)
906 {
907 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
908 {
909 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
910 SV **bot, **top;
911 AV *av = newAV (); /* return values */
912 SV **cb;
913 dSP;
914
915 GV *gv = CvGV (cx->blk_sub.cv);
916 SV *fullname = sv_2mortal (newSV (0));
917 if (isGV (gv))
918 gv_efullname3 (fullname, gv, 0);
919
920 bot = PL_stack_base + cx->blk_oldsp + 1;
921 top = cx->blk_gimme == G_ARRAY ? SP + 1
922 : cx->blk_gimme == G_SCALAR ? bot + 1
923 : bot;
924
925 av_extend (av, top - bot);
926 while (bot < top)
927 av_push (av, SvREFCNT_inc_NN (*bot++));
928
929 PL_runops = RUNOPS_DEFAULT;
930 ENTER;
931 SAVETMPS;
932 EXTEND (SP, 3);
933 PUSHMARK (SP);
934 PUSHs (&PL_sv_no);
935 PUSHs (fullname);
936 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
937 PUTBACK;
938 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
939 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
940 SPAGAIN;
941 FREETMPS;
942 LEAVE;
943 PL_runops = runops_trace;
944 }
945
946 if (oldcop != PL_curcop)
947 {
948 oldcop = PL_curcop;
949
950 if (PL_curcop != &PL_compiling)
951 {
952 SV **cb;
953
954 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
955 {
956 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
957
958 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
959 {
960 runops_proc_t old_runops = PL_runops;
961 dSP;
962 GV *gv = CvGV (cx->blk_sub.cv);
963 SV *fullname = sv_2mortal (newSV (0));
964
965 if (isGV (gv))
966 gv_efullname3 (fullname, gv, 0);
967
968 PL_runops = RUNOPS_DEFAULT;
969 ENTER;
970 SAVETMPS;
971 EXTEND (SP, 3);
972 PUSHMARK (SP);
973 PUSHs (&PL_sv_yes);
974 PUSHs (fullname);
975 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
976 PUTBACK;
977 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
978 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
979 SPAGAIN;
980 FREETMPS;
981 LEAVE;
982 PL_runops = runops_trace;
983 }
984
985 oldcxix = cxstack_ix;
986 }
987
988 if (cctx->flags & CC_TRACE_LINE)
989 {
990 dSP;
991
992 PL_runops = RUNOPS_DEFAULT;
993 ENTER;
994 SAVETMPS;
995 EXTEND (SP, 3);
996 PL_runops = RUNOPS_DEFAULT;
997 PUSHMARK (SP);
998 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
999 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1000 PUTBACK;
1001 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1002 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1003 SPAGAIN;
1004 FREETMPS;
1005 LEAVE;
1006 PL_runops = runops_trace;
1007 }
1008 }
1009 }
1010 }
1011 }
1012
1013 TAINT_NOT;
1014 return 0;
1015}
1016
1017/* inject a fake call to Coro::State::_cctx_init into the execution */
1018/* _cctx_init should be careful, as it could be called at almost any time */
1019/* during execution of a perl program */
1020static void NOINLINE
1021cctx_prepare (pTHX_ coro_cctx *cctx)
1022{
1023 dSP;
1024 LOGOP myop;
1025
1026 PL_top_env = &PL_start_env;
1027
1028 if (cctx->flags & CC_TRACE)
1029 PL_runops = runops_trace;
1030
1031 Zero (&myop, 1, LOGOP);
1032 myop.op_next = PL_op;
1033 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1034
1035 PUSHMARK (SP);
1036 EXTEND (SP, 2);
1037 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1038 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1039 PUTBACK;
1040 PL_op = (OP *)&myop;
1041 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1042 SPAGAIN;
1043}
1044
1045/*
1046 * this is a _very_ stripped down perl interpreter ;)
1047 */
1048static void
1049cctx_run (void *arg)
1050{
1051 dTHX;
1052
1053 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1054 UNLOCK;
1055
1056 /* we now skip the entersub that lead to transfer() */
1057 PL_op = PL_op->op_next;
1058
1059 /* inject a fake subroutine call to cctx_init */
1060 cctx_prepare (aTHX_ (coro_cctx *)arg);
1061
1062 /* somebody or something will hit me for both perl_run and PL_restartop */
1063 PL_restartop = PL_op;
1064 perl_run (PL_curinterp);
1065
1066 /*
1067 * If perl-run returns we assume exit() was being called or the coro
1068 * fell off the end, which seems to be the only valid (non-bug)
1069 * reason for perl_run to return. We try to exit by jumping to the
1070 * bootstrap-time "top" top_env, as we cannot restore the "main"
1071 * coroutine as Coro has no such concept
1072 */
1073 PL_top_env = main_top_env;
1074 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1075}
1076
1077static coro_cctx *
1078cctx_new ()
1079{
1080 coro_cctx *cctx;
1081 void *stack_start;
1082 size_t stack_size;
1083
1084 ++cctx_count;
1085 Newz (0, cctx, 1, coro_cctx);
1086
1087#if HAVE_MMAP
1088 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1089 /* mmap supposedly does allocate-on-write for us */
1090 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1091
1092 if (cctx->sptr != (void *)-1)
1093 {
1094# if CORO_STACKGUARD
1095 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1096# endif
1097 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1098 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1099 cctx->flags |= CC_MAPPED;
1100 }
1101 else
1102#endif
1103 {
1104 cctx->ssize = coro_stacksize * (long)sizeof (long);
1105 New (0, cctx->sptr, coro_stacksize, long);
1106
1107 if (!cctx->sptr)
1108 {
1109 perror ("FATAL: unable to allocate stack for coroutine");
1110 _exit (EXIT_FAILURE);
1111 }
1112
1113 stack_start = cctx->sptr;
1114 stack_size = cctx->ssize;
1115 }
1116
1117 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1118 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1119
1120 return cctx;
1121}
1122
1123static void
1124cctx_destroy (coro_cctx *cctx)
1125{
1126 if (!cctx)
1127 return;
1128
1129 --cctx_count;
1130 coro_destroy (&cctx->cctx);
1131
1132 /* coro_transfer creates new, empty cctx's */
1133 if (cctx->sptr)
1134 {
1135#if CORO_USE_VALGRIND
1136 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1137#endif
1138
1139#if HAVE_MMAP
1140 if (cctx->flags & CC_MAPPED)
1141 munmap (cctx->sptr, cctx->ssize);
1142 else
1143#endif
1144 Safefree (cctx->sptr);
1145 }
1146
1147 Safefree (cctx);
1148}
1149
1150/* wether this cctx should be destructed */
1151#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1152
1153static coro_cctx *
1154cctx_get (pTHX)
1155{
1156 while (expect_true (cctx_first))
1157 {
1158 coro_cctx *cctx = cctx_first;
1159 cctx_first = cctx->next;
1160 --cctx_idle;
1161
1162 if (expect_true (!CCTX_EXPIRED (cctx)))
1163 return cctx;
1164
1165 cctx_destroy (cctx);
1166 }
1167
1168 return cctx_new ();
1169}
1170
1171static void
1172cctx_put (coro_cctx *cctx)
1173{
1174 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1175
1176 /* free another cctx if overlimit */
1177 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1178 {
1179 coro_cctx *first = cctx_first;
1180 cctx_first = first->next;
1181 --cctx_idle;
1182
1183 cctx_destroy (first);
1184 }
1185
1186 ++cctx_idle;
1187 cctx->next = cctx_first;
1188 cctx_first = cctx;
1189}
1190
1191/** coroutine switching *****************************************************/
1192
1193static void
1194transfer_check (pTHX_ struct coro *prev, struct coro *next)
1195{
1196 if (expect_true (prev != next))
1197 {
1198 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1199 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1200
1201 if (expect_false (next->flags & CF_RUNNING))
1202 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1203
1204 if (expect_false (next->flags & CF_DESTROYED))
1205 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1206
1207#if !PERL_VERSION_ATLEAST (5,10,0)
1208 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1209 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1210#endif
1211 }
1212}
1213
1214/* always use the TRANSFER macro */
1215static void NOINLINE
1216transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1217{
1218 dSTACKLEVEL;
1219
1220 /* sometimes transfer is only called to set idle_sp */
1221 if (expect_false (!next))
1222 {
1223 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1224 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1225 }
1226 else if (expect_true (prev != next))
1227 {
1228 static volatile int has_throw;
1229 coro_cctx *prev__cctx;
1230
1231 if (expect_false (prev->flags & CF_NEW))
1232 {
1233 /* create a new empty/source context */
1234 ++cctx_count;
1235 New (0, prev->cctx, 1, coro_cctx);
1236 prev->cctx->sptr = 0;
1237 coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1238
1239 prev->flags &= ~CF_NEW;
1240 prev->flags |= CF_RUNNING;
1241 }
1242
1243 prev->flags &= ~CF_RUNNING;
1244 next->flags |= CF_RUNNING;
1245
1246 LOCK;
1247
1248 /* first get rid of the old state */
1249 save_perl (aTHX_ prev);
1250
1251 if (expect_false (next->flags & CF_NEW))
1252 {
1253 /* need to start coroutine */
1254 next->flags &= ~CF_NEW;
1255 /* setup coroutine call */
1256 coro_setup (aTHX_ next);
1257 }
1258 else
1259 load_perl (aTHX_ next);
1260
1261 prev__cctx = prev->cctx;
1262
1263 /* possibly "free" the cctx */
1264 if (expect_true (
1265 prev__cctx->idle_sp == STACKLEVEL
1266 && !(prev__cctx->flags & CC_TRACE)
1267 && !force_cctx
1268 ))
1269 {
1270 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1271 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1272
1273 prev->cctx = 0;
1274
1275 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1276 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1277 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1278 if (!next->cctx)
1279 next->cctx = cctx_get (aTHX);
1280
1281 cctx_put (prev__cctx);
1282 }
1283
1284 ++next->usecount;
1285
1286 if (expect_true (!next->cctx))
1287 next->cctx = cctx_get (aTHX);
1288
1289 has_throw = !!next->throw;
1290
1291 if (expect_false (prev__cctx != next->cctx))
1292 {
1293 prev__cctx->top_env = PL_top_env;
1294 PL_top_env = next->cctx->top_env;
1295 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1296 }
1297
1298 free_coro_mortal (aTHX);
1299 UNLOCK;
1300
1301 if (expect_false (has_throw))
1302 {
1303 struct coro *coro = SvSTATE (coro_current);
1304
1305 if (coro->throw)
1306 {
1307 SV *exception = coro->throw;
1308 coro->throw = 0;
1309 sv_setsv (ERRSV, exception);
1310 croak (0);
1311 }
1312 }
1313 }
1314}
1315
1316struct transfer_args
1317{
1318 struct coro *prev, *next;
1319};
1320
1321#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1322#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1323
1324/** high level stuff ********************************************************/
1325
1326static int
1327coro_state_destroy (pTHX_ struct coro *coro)
1328{
1329 if (coro->flags & CF_DESTROYED)
1330 return 0;
1331
1332 coro->flags |= CF_DESTROYED;
1333
1334 if (coro->flags & CF_READY)
1335 {
1336 /* reduce nready, as destroying a ready coro effectively unreadies it */
1337 /* alternative: look through all ready queues and remove the coro */
1338 LOCK;
1339 --coro_nready;
1340 UNLOCK;
1341 }
1342 else
1343 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1344
1345 if (coro->mainstack && coro->mainstack != main_mainstack)
1346 {
1347 struct coro temp;
1348
1349 if (coro->flags & CF_RUNNING)
1350 croak ("FATAL: tried to destroy currently running coroutine");
1351
1352 save_perl (aTHX_ &temp);
1353 load_perl (aTHX_ coro);
1354
1355 coro_destruct (aTHX_ coro);
1356
1357 load_perl (aTHX_ &temp);
1358
1359 coro->slot = 0;
1360 }
1361
1362 cctx_destroy (coro->cctx);
1363 SvREFCNT_dec (coro->args);
1364
1365 if (coro->next) coro->next->prev = coro->prev;
1366 if (coro->prev) coro->prev->next = coro->next;
1367 if (coro == coro_first) coro_first = coro->next;
1368
1369 return 1;
1370}
1371
1372static int
1373coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1374{
1375 struct coro *coro = (struct coro *)mg->mg_ptr;
1376 mg->mg_ptr = 0;
1377
1378 coro->hv = 0;
1379
1380 if (--coro->refcnt < 0)
1381 {
1382 coro_state_destroy (aTHX_ coro);
1383 Safefree (coro);
1384 }
1385
1386 return 0;
1387}
1388
1389static int
1390coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1391{
1392 struct coro *coro = (struct coro *)mg->mg_ptr;
1393
1394 ++coro->refcnt;
1395
1396 return 0;
1397}
1398
1399static MGVTBL coro_state_vtbl = {
1400 0, 0, 0, 0,
1401 coro_state_free,
1402 0,
1403#ifdef MGf_DUP
1404 coro_state_dup,
1405#else
1406# define MGf_DUP 0
1407#endif
1408};
1409
1410static void
1411prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1412{
1413 ta->prev = SvSTATE (prev_sv);
1414 ta->next = SvSTATE (next_sv);
1415 TRANSFER_CHECK (*ta);
1416}
1417
1418static void
1419api_transfer (SV *prev_sv, SV *next_sv)
1420{
1421 dTHX;
1422 struct transfer_args ta;
1423
1424 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1425 TRANSFER (ta, 1);
1426}
1427
1428/** Coro ********************************************************************/
1429
1430static void
1431coro_enq (pTHX_ SV *coro_sv)
1432{
1433 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1434}
1435
1436static SV *
1437coro_deq (pTHX)
1438{
1439 int prio;
1440
1441 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1442 if (AvFILLp (coro_ready [prio]) >= 0)
1443 return av_shift (coro_ready [prio]);
1444
1445 return 0;
1446}
1447
1448static int
1449api_ready (SV *coro_sv)
1450{
1451 dTHX;
1452 struct coro *coro;
1453 SV *sv_hook;
1454 void (*xs_hook)(void);
1455
1456 if (SvROK (coro_sv))
1457 coro_sv = SvRV (coro_sv);
1458
1459 coro = SvSTATE (coro_sv);
1460
1461 if (coro->flags & CF_READY)
1462 return 0;
1463
1464 coro->flags |= CF_READY;
1465
1466 LOCK;
1467
1468 sv_hook = coro_nready ? 0 : coro_readyhook;
1469 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1470
1471 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1472 ++coro_nready;
1473
1474 UNLOCK;
1475
1476 if (sv_hook)
1477 {
1478 dSP;
1479
1480 ENTER;
1481 SAVETMPS;
1482
1483 PUSHMARK (SP);
1484 PUTBACK;
1485 call_sv (sv_hook, G_DISCARD);
1486 SPAGAIN;
1487
1488 FREETMPS;
1489 LEAVE;
1490 }
1491
1492 if (xs_hook)
1493 xs_hook ();
1494
1495 return 1;
1496}
1497
1498static int
1499api_is_ready (SV *coro_sv)
1500{
1501 dTHX;
1502 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1503}
1504
1505static void
1506prepare_schedule (pTHX_ struct transfer_args *ta)
1507{
1508 SV *prev_sv, *next_sv;
1509
1510 for (;;)
1511 {
1512 LOCK;
1513 next_sv = coro_deq (aTHX);
1514
1515 /* nothing to schedule: call the idle handler */
1516 if (expect_false (!next_sv))
1517 {
1518 dSP;
1519 UNLOCK;
1520
1521 ENTER;
1522 SAVETMPS;
1523
1524 PUSHMARK (SP);
1525 PUTBACK;
1526 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1527 SPAGAIN;
1528
1529 FREETMPS;
1530 LEAVE;
1531 continue;
1532 }
1533
1534 ta->next = SvSTATE (next_sv);
1535
1536 /* cannot transfer to destroyed coros, skip and look for next */
1537 if (expect_false (ta->next->flags & CF_DESTROYED))
1538 {
1539 UNLOCK;
1540 SvREFCNT_dec (next_sv);
1541 /* coro_nready is already taken care of by destroy */
1542 continue;
1543 }
1544
1545 --coro_nready;
1546 UNLOCK;
1547 break;
1548 }
1549
1550 /* free this only after the transfer */
1551 prev_sv = SvRV (coro_current);
1552 ta->prev = SvSTATE (prev_sv);
1553 TRANSFER_CHECK (*ta);
1554 assert (ta->next->flags & CF_READY);
1555 ta->next->flags &= ~CF_READY;
1556 SvRV_set (coro_current, next_sv);
1557
1558 LOCK;
1559 free_coro_mortal (aTHX);
1560 coro_mortal = prev_sv;
1561 UNLOCK;
1562}
1563
1564static void
1565prepare_cede (pTHX_ struct transfer_args *ta)
1566{
1567 api_ready (coro_current);
1568 prepare_schedule (aTHX_ ta);
1569}
1570
1571static int
1572prepare_cede_notself (pTHX_ struct transfer_args *ta)
1573{
1574 if (coro_nready)
1575 {
1576 SV *prev = SvRV (coro_current);
1577 prepare_schedule (aTHX_ ta);
1578 api_ready (prev);
1579 return 1;
1580 }
1581 else
1582 return 0;
1583}
1584
1585static void
1586api_schedule (void)
1587{
1588 dTHX;
1589 struct transfer_args ta;
1590
1591 prepare_schedule (aTHX_ &ta);
1592 TRANSFER (ta, 1);
1593}
1594
1595static int
1596api_cede (void)
1597{
1598 dTHX;
1599 struct transfer_args ta;
1600
1601 prepare_cede (aTHX_ &ta);
1602
1603 if (expect_true (ta.prev != ta.next))
1604 {
1605 TRANSFER (ta, 1);
1606 return 1;
1607 }
1608 else
1609 return 0;
1610}
1611
1612static int
1613api_cede_notself (void)
1614{
1615 dTHX;
1616 struct transfer_args ta;
1617
1618 if (prepare_cede_notself (aTHX_ &ta))
1619 {
1620 TRANSFER (ta, 1);
1621 return 1;
1622 }
1623 else
1624 return 0;
1625}
1626
1627static void
1628api_trace (SV *coro_sv, int flags)
1629{
1630 dTHX;
1631 struct coro *coro = SvSTATE (coro_sv);
1632
1633 if (flags & CC_TRACE)
1634 {
1635 if (!coro->cctx)
1636 coro->cctx = cctx_new ();
1637 else if (!(coro->cctx->flags & CC_TRACE))
1638 croak ("cannot enable tracing on coroutine with custom stack");
1639
1640 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1641 }
1642 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1643 {
1644 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1645
1646 if (coro->flags & CF_RUNNING)
1647 PL_runops = RUNOPS_DEFAULT;
1648 else
1649 coro->slot->runops = RUNOPS_DEFAULT;
1650 }
1651}
1652
1653static int
1654coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1655{
1656 AV *padlist;
1657 AV *av = (AV *)mg->mg_obj;
1658
1659 abort ();
1660
1661 return 0;
1662}
1663
1664static MGVTBL coro_gensub_vtbl = {
1665 0, 0, 0, 0,
1666 coro_gensub_free
1667};
1668
1669/*****************************************************************************/
1670/* PerlIO::cede */
1671
1672typedef struct
1673{
1674 PerlIOBuf base;
1675 NV next, every;
1676} PerlIOCede;
1677
1678static IV
1679PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1680{
1681 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1682
1683 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1684 self->next = nvtime () + self->every;
1685
1686 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1687}
1688
1689static SV *
1690PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1691{
1692 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1693
1694 return newSVnv (self->every);
1695}
1696
1697static IV
1698PerlIOCede_flush (pTHX_ PerlIO *f)
1699{
1700 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1701 double now = nvtime ();
1702
1703 if (now >= self->next)
1704 {
1705 api_cede ();
1706 self->next = now + self->every;
1707 }
1708
1709 return PerlIOBuf_flush (aTHX_ f);
1710}
1711
1712static PerlIO_funcs PerlIO_cede =
1713{
1714 sizeof(PerlIO_funcs),
1715 "cede",
1716 sizeof(PerlIOCede),
1717 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1718 PerlIOCede_pushed,
1719 PerlIOBuf_popped,
1720 PerlIOBuf_open,
1721 PerlIOBase_binmode,
1722 PerlIOCede_getarg,
1723 PerlIOBase_fileno,
1724 PerlIOBuf_dup,
1725 PerlIOBuf_read,
1726 PerlIOBuf_unread,
1727 PerlIOBuf_write,
1728 PerlIOBuf_seek,
1729 PerlIOBuf_tell,
1730 PerlIOBuf_close,
1731 PerlIOCede_flush,
1732 PerlIOBuf_fill,
1733 PerlIOBase_eof,
1734 PerlIOBase_error,
1735 PerlIOBase_clearerr,
1736 PerlIOBase_setlinebuf,
1737 PerlIOBuf_get_base,
1738 PerlIOBuf_bufsiz,
1739 PerlIOBuf_get_ptr,
1740 PerlIOBuf_get_cnt,
1741 PerlIOBuf_set_ptrcnt,
1742};
1743
1744
1745MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1746
1747PROTOTYPES: DISABLE
1748
1749BOOT:
1750{
1751#ifdef USE_ITHREADS
1752 MUTEX_INIT (&coro_lock);
1753#endif
1754 BOOT_PAGESIZE;
1755
1756 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1757 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1758
1759 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1760 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1761 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1762
1763 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1764 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1765 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1766
1767 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1768
1769 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1770 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1771 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1772 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1773
1774 main_mainstack = PL_mainstack;
1775 main_top_env = PL_top_env;
1776
1777 while (main_top_env->je_prev)
1778 main_top_env = main_top_env->je_prev;
1779
1780 coroapi.ver = CORO_API_VERSION;
1781 coroapi.rev = CORO_API_REVISION;
1782 coroapi.transfer = api_transfer;
1783
1784 {
1785 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1786
1787 if (!svp) croak ("Time::HiRes is required");
1788 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1789
1790 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1791 }
1792
1793 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1794}
1795
1796SV *
1797new (char *klass, ...)
1798 CODE:
1799{
1800 struct coro *coro;
1801 MAGIC *mg;
1802 HV *hv;
1803 int i;
1804
1805 Newz (0, coro, 1, struct coro);
1806 coro->args = newAV ();
1807 coro->flags = CF_NEW;
1808
1809 if (coro_first) coro_first->prev = coro;
1810 coro->next = coro_first;
1811 coro_first = coro;
1812
1813 coro->hv = hv = newHV ();
1814 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1815 mg->mg_flags |= MGf_DUP;
1816 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1817
1818 av_extend (coro->args, items - 1);
1819 for (i = 1; i < items; i++)
1820 av_push (coro->args, newSVsv (ST (i)));
1821}
1822 OUTPUT:
1823 RETVAL
1824
1825# these not obviously related functions are all rolled into the same xs
1826# function to increase chances that they all will call transfer with the same
1827# stack offset
1828void
1829_set_stacklevel (...)
1830 ALIAS:
1831 Coro::State::transfer = 1
1832 Coro::schedule = 2
1833 Coro::cede = 3
1834 Coro::cede_notself = 4
1835 CODE:
1836{
1837 struct transfer_args ta;
1838
1839 PUTBACK;
1840 switch (ix)
1841 {
1842 case 0:
1843 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1844 ta.next = 0;
1845 break;
1846
1847 case 1:
1848 if (items != 2)
1849 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1850
1851 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1852 break;
1853
1854 case 2:
1855 prepare_schedule (aTHX_ &ta);
1856 break;
1857
1858 case 3:
1859 prepare_cede (aTHX_ &ta);
1860 break;
1861
1862 case 4:
1863 if (!prepare_cede_notself (aTHX_ &ta))
1864 XSRETURN_EMPTY;
1865
1866 break;
1867 }
1868 SPAGAIN;
1869
1870 BARRIER;
1871 PUTBACK;
1872 TRANSFER (ta, 0);
1873 SPAGAIN; /* might be the sp of a different coroutine now */
1874 /* be extra careful not to ever do anything after TRANSFER */
1875}
1876
1877bool
1878_destroy (SV *coro_sv)
1879 CODE:
1880 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1881 OUTPUT:
1882 RETVAL
1883
1884void
1885_exit (int code)
1886 PROTOTYPE: $
1887 CODE:
1888 _exit (code);
1889
1890int
1891cctx_stacksize (int new_stacksize = 0)
1892 CODE:
1893 RETVAL = coro_stacksize;
1894 if (new_stacksize)
1895 coro_stacksize = new_stacksize;
1896 OUTPUT:
1897 RETVAL
1898
1899int
1900cctx_count ()
1901 CODE:
1902 RETVAL = cctx_count;
1903 OUTPUT:
1904 RETVAL
1905
1906int
1907cctx_idle ()
1908 CODE:
1909 RETVAL = cctx_idle;
1910 OUTPUT:
1911 RETVAL
1912
1913void
1914list ()
1915 PPCODE:
1916{
1917 struct coro *coro;
1918 for (coro = coro_first; coro; coro = coro->next)
1919 if (coro->hv)
1920 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1921}
1922
1923void
1924call (Coro::State coro, SV *coderef)
1925 ALIAS:
1926 eval = 1
1927 CODE:
1928{
1929 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1930 {
1931 struct coro temp;
1932
1933 if (!(coro->flags & CF_RUNNING))
349 { 1934 {
350 /* I never used formats, so how should I know how these are implemented? */ 1935 PUTBACK;
351 /* my bold guess is as a simple, plain sub... */ 1936 save_perl (aTHX_ &temp);
352 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 1937 load_perl (aTHX_ coro);
1938 }
1939
1940 {
1941 dSP;
1942 ENTER;
1943 SAVETMPS;
1944 PUTBACK;
1945 PUSHSTACK;
1946 PUSHMARK (SP);
1947
1948 if (ix)
1949 eval_sv (coderef, 0);
1950 else
1951 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1952
1953 POPSTACK;
1954 SPAGAIN;
1955 FREETMPS;
1956 LEAVE;
1957 PUTBACK;
1958 }
1959
1960 if (!(coro->flags & CF_RUNNING))
1961 {
1962 save_perl (aTHX_ coro);
1963 load_perl (aTHX_ &temp);
1964 SPAGAIN;
353 } 1965 }
354 } 1966 }
355 while (cxix >= 0); 1967}
356 1968
357 if (top_si->si_type == PERLSI_MAIN) 1969SV *
358 break; 1970is_ready (Coro::State coro)
1971 PROTOTYPE: $
1972 ALIAS:
1973 is_ready = CF_READY
1974 is_running = CF_RUNNING
1975 is_new = CF_NEW
1976 is_destroyed = CF_DESTROYED
1977 CODE:
1978 RETVAL = boolSV (coro->flags & ix);
1979 OUTPUT:
1980 RETVAL
359 1981
360 top_si = top_si->si_prev; 1982void
361 ccstk = top_si->si_cxstack; 1983api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
362 cxix = top_si->si_cxix; 1984
1985SV *
1986has_cctx (Coro::State coro)
1987 PROTOTYPE: $
1988 CODE:
1989 RETVAL = boolSV (!!coro->cctx);
1990 OUTPUT:
1991 RETVAL
1992
1993int
1994is_traced (Coro::State coro)
1995 PROTOTYPE: $
1996 CODE:
1997 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1998 OUTPUT:
1999 RETVAL
2000
2001IV
2002rss (Coro::State coro)
2003 PROTOTYPE: $
2004 ALIAS:
2005 usecount = 1
2006 CODE:
2007 switch (ix)
2008 {
2009 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2010 case 1: RETVAL = coro->usecount; break;
363 } 2011 }
2012 OUTPUT:
2013 RETVAL
364 2014
365 PUTBACK; 2015void
366 } 2016force_cctx ()
2017 CODE:
2018 struct coro *coro = SvSTATE (coro_current);
2019 coro->cctx->idle_sp = 0;
367 2020
368 c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 2021void
369 c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 2022swap_defsv (Coro::State self)
370 c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 2023 PROTOTYPE: $
371 2024 ALIAS:
372 c->dowarn = PL_dowarn; 2025 swap_defav = 1
373 2026 CODE:
374 c->curstackinfo = PL_curstackinfo; 2027 if (!self->slot)
375 c->curstack = PL_curstack; 2028 croak ("cannot swap state with coroutine that has no saved state");
376 c->mainstack = PL_mainstack; 2029 else
377 c->stack_sp = PL_stack_sp;
378 c->op = PL_op;
379 c->curpad = PL_curpad;
380 c->stack_base = PL_stack_base;
381 c->stack_max = PL_stack_max;
382 c->tmps_stack = PL_tmps_stack;
383 c->tmps_floor = PL_tmps_floor;
384 c->tmps_ix = PL_tmps_ix;
385 c->tmps_max = PL_tmps_max;
386 c->markstack = PL_markstack;
387 c->markstack_ptr = PL_markstack_ptr;
388 c->markstack_max = PL_markstack_max;
389 c->scopestack = PL_scopestack;
390 c->scopestack_ix = PL_scopestack_ix;
391 c->scopestack_max = PL_scopestack_max;
392 c->savestack = PL_savestack;
393 c->savestack_ix = PL_savestack_ix;
394 c->savestack_max = PL_savestack_max;
395 c->retstack = PL_retstack;
396 c->retstack_ix = PL_retstack_ix;
397 c->retstack_max = PL_retstack_max;
398 c->curcop = PL_curcop;
399}
400
401/*
402 * destroy the stacks, the callchain etc...
403 * still there is a memleak of 128 bytes...
404 */
405STATIC void
406destroy_stacks(pTHX)
407{
408 /* is this ugly, I ask? */
409 while (PL_scopestack_ix)
410 LEAVE;
411
412 /* sure it is, but more important: is it correct?? :/ */
413 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
414 FREETMPS;
415
416 while (PL_curstackinfo->si_next)
417 PL_curstackinfo = PL_curstackinfo->si_next;
418
419 while (PL_curstackinfo)
420 {
421 PERL_SI *p = PL_curstackinfo->si_prev;
422
423 { 2030 {
424 dSP; 2031 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
425 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 2032 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
426 PUTBACK; /* possibly superfluous */ 2033
2034 SV *tmp = *src; *src = *dst; *dst = tmp;
427 } 2035 }
428 2036
429 dounwind(-1); 2037MODULE = Coro::State PACKAGE = Coro
430 2038
431 SvREFCNT_dec(PL_curstackinfo->si_stack); 2039BOOT:
432 Safefree(PL_curstackinfo->si_cxstack);
433 Safefree(PL_curstackinfo);
434 PL_curstackinfo = p;
435 }
436
437 Safefree(PL_tmps_stack);
438 Safefree(PL_markstack);
439 Safefree(PL_scopestack);
440 Safefree(PL_savestack);
441 Safefree(PL_retstack);
442}
443
444STATIC void
445transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
446{ 2040{
447 dSP; 2041 int i;
448 2042
449 if (prev != next) 2043 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
450 { 2044 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
451 /* 2045 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
452 * this could be done in newprocess which would lead to 2046
453 * extremely elegant and fast (just SAVE/LOAD) 2047 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
454 * code here, but lazy allocation of stacks has also 2048 SvREADONLY_on (coro_current);
455 * some virtues and the overhead of the if() is nil. 2049
456 */ 2050 coro_stash = gv_stashpv ("Coro", TRUE);
457 if (next->mainstack) 2051
2052 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2053 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2054 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2055 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2056 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2057 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2058
2059 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2060 coro_ready[i] = newAV ();
2061
458 { 2062 {
459 SAVE (prev, flags); 2063 SV *sv = perl_get_sv ("Coro::API", TRUE);
460 LOAD (next); 2064 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
461 /* mark this state as in-use */ 2065
462 next->mainstack = 0; 2066 coroapi.schedule = api_schedule;
463 next->tmps_ix = -2; 2067 coroapi.cede = api_cede;
2068 coroapi.cede_notself = api_cede_notself;
2069 coroapi.ready = api_ready;
2070 coroapi.is_ready = api_is_ready;
2071 coroapi.nready = &coro_nready;
2072 coroapi.current = coro_current;
2073
2074 GCoroAPI = &coroapi;
2075 sv_setiv (sv, (IV)&coroapi);
2076 SvREADONLY_on (sv);
464 } 2077 }
465 else if (next->tmps_ix == -2) 2078}
2079
2080void
2081_set_current (SV *current)
2082 PROTOTYPE: $
2083 CODE:
2084 SvREFCNT_dec (SvRV (coro_current));
2085 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2086
2087void
2088_set_readyhook (SV *hook)
2089 PROTOTYPE: $
2090 CODE:
2091 LOCK;
2092 SvREFCNT_dec (coro_readyhook);
2093 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2094 UNLOCK;
2095
2096int
2097prio (Coro::State coro, int newprio = 0)
2098 ALIAS:
2099 nice = 1
2100 CODE:
2101{
2102 RETVAL = coro->prio;
2103
2104 if (items > 1)
466 { 2105 {
467 croak ("tried to transfer to running coroutine"); 2106 if (ix)
2107 newprio = coro->prio - newprio;
2108
2109 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2110 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2111
2112 coro->prio = newprio;
468 } 2113 }
469 else 2114}
2115 OUTPUT:
2116 RETVAL
2117
2118SV *
2119ready (SV *self)
2120 PROTOTYPE: $
2121 CODE:
2122 RETVAL = boolSV (api_ready (self));
2123 OUTPUT:
2124 RETVAL
2125
2126int
2127nready (...)
2128 PROTOTYPE:
2129 CODE:
2130 RETVAL = coro_nready;
2131 OUTPUT:
2132 RETVAL
2133
2134void
2135throw (Coro::State self, SV *throw = &PL_sv_undef)
2136 PROTOTYPE: $;$
2137 CODE:
2138 SvREFCNT_dec (self->throw);
2139 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2140
2141# for async_pool speedup
2142void
2143_pool_1 (SV *cb)
2144 CODE:
2145{
2146 struct coro *coro = SvSTATE (coro_current);
2147 HV *hv = (HV *)SvRV (coro_current);
2148 AV *defav = GvAV (PL_defgv);
2149 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2150 AV *invoke_av;
2151 int i, len;
2152
2153 if (!invoke)
470 { 2154 {
471 /* 2155 SV *old = PL_diehook;
472 * emulate part of the perl startup here. 2156 PL_diehook = 0;
473 */
474 UNOP myop;
475
476 SAVE (prev, -1); /* first get rid of the old state */
477
478 init_stacks (); /* from perl.c */
479 SPAGAIN;
480
481 PL_op = (OP *)&myop;
482 /*PL_curcop = 0;*/
483 SvREFCNT_dec (GvAV (PL_defgv)); 2157 SvREFCNT_dec (old);
484 GvAV (PL_defgv) = next->args; 2158 croak ("\3async_pool terminate\2\n");
485
486 Zero(&myop, 1, UNOP);
487 myop.op_next = Nullop;
488 myop.op_flags = OPf_WANT_VOID;
489
490 PUSHMARK(SP);
491 XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
492 /*
493 * the next line is slightly wrong, as PL_op->op_next
494 * is actually being executed so we skip the first op.
495 * that doesn't matter, though, since it is only
496 * pp_nextstate and we never return...
497 * ah yes, and I don't care anyways ;)
498 */
499 PUTBACK;
500 PL_op = pp_entersub(aTHX);
501 SPAGAIN;
502
503 ENTER; /* necessary e.g. for dounwind */
504 } 2159 }
505 }
506}
507 2160
2161 SvREFCNT_dec (coro->saved_deffh);
2162 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2163
2164 hv_store (hv, "desc", sizeof ("desc") - 1,
2165 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2166
2167 invoke_av = (AV *)SvRV (invoke);
2168 len = av_len (invoke_av);
2169
2170 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2171
2172 if (len > 0)
2173 {
2174 av_fill (defav, len - 1);
2175 for (i = 0; i < len; ++i)
2176 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2177 }
2178
2179 SvREFCNT_dec (invoke);
2180}
2181
2182void
2183_pool_2 (SV *cb)
2184 CODE:
2185{
2186 struct coro *coro = SvSTATE (coro_current);
2187
2188 sv_setsv (cb, &PL_sv_undef);
2189
2190 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2191 coro->saved_deffh = 0;
2192
2193 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2194 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2195 {
2196 SV *old = PL_diehook;
2197 PL_diehook = 0;
2198 SvREFCNT_dec (old);
2199 croak ("\3async_pool terminate\2\n");
2200 }
2201
2202 av_clear (GvAV (PL_defgv));
2203 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2204 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2205
2206 coro->prio = 0;
2207
2208 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2209 api_trace (coro_current, 0);
2210
2211 av_push (av_async_pool, newSVsv (coro_current));
2212}
2213
2214#if 0
2215
2216void
2217_generator_call (...)
2218 PROTOTYPE: @
2219 PPCODE:
2220 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2221 xxxx
2222 abort ();
2223
2224SV *
2225gensub (SV *sub, ...)
2226 PROTOTYPE: &;@
2227 CODE:
2228{
2229 struct coro *coro;
2230 MAGIC *mg;
2231 CV *xcv;
2232 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2233 int i;
2234
2235 CvGV (ncv) = CvGV (cv);
2236 CvFILE (ncv) = CvFILE (cv);
2237
2238 Newz (0, coro, 1, struct coro);
2239 coro->args = newAV ();
2240 coro->flags = CF_NEW;
2241
2242 av_extend (coro->args, items - 1);
2243 for (i = 1; i < items; i++)
2244 av_push (coro->args, newSVsv (ST (i)));
2245
2246 CvISXSUB_on (ncv);
2247 CvXSUBANY (ncv).any_ptr = (void *)coro;
2248
2249 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2250
2251 CvXSUB (ncv) = CvXSUB (xcv);
2252 CvANON_on (ncv);
2253
2254 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2255 RETVAL = newRV_noinc ((SV *)ncv);
2256}
2257 OUTPUT:
2258 RETVAL
2259
2260#endif
2261
2262
508MODULE = Coro::State PACKAGE = Coro::State 2263MODULE = Coro::State PACKAGE = Coro::AIO
509 2264
510PROTOTYPES: ENABLE 2265void
2266_get_state (SV *self)
2267 PPCODE:
2268{
2269 AV *defav = GvAV (PL_defgv);
2270 AV *av = newAV ();
2271 int i;
2272 SV *data_sv = newSV (sizeof (struct io_state));
2273 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2274 SvCUR_set (data_sv, sizeof (struct io_state));
2275 SvPOK_only (data_sv);
2276
2277 data->errorno = errno;
2278 data->laststype = PL_laststype;
2279 data->laststatval = PL_laststatval;
2280 data->statcache = PL_statcache;
2281
2282 av_extend (av, AvFILLp (defav) + 1 + 1);
2283
2284 for (i = 0; i <= AvFILLp (defav); ++i)
2285 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2286
2287 av_push (av, data_sv);
2288
2289 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2290
2291 api_ready (self);
2292}
2293
2294void
2295_set_state (SV *state)
2296 PROTOTYPE: $
2297 PPCODE:
2298{
2299 AV *av = (AV *)SvRV (state);
2300 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2301 int i;
2302
2303 errno = data->errorno;
2304 PL_laststype = data->laststype;
2305 PL_laststatval = data->laststatval;
2306 PL_statcache = data->statcache;
2307
2308 EXTEND (SP, AvFILLp (av));
2309 for (i = 0; i < AvFILLp (av); ++i)
2310 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2311}
2312
2313
2314MODULE = Coro::State PACKAGE = Coro::AnyEvent
511 2315
512BOOT: 2316BOOT:
513{ /* {} necessary for stoopid perl-5.6.x */ 2317 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
514 HV * stash = gv_stashpvn("Coro::State", 10, TRUE);
515 2318
516 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV)); 2319SV *
517 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV)); 2320_schedule (...)
518 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV)); 2321 PROTOTYPE: @
2322 CODE:
2323{
2324 static int incede;
519 2325
520 if (!padlist_cache) 2326 api_cede_notself ();
521 padlist_cache = newHV ();
522}
523 2327
524Coro::State 2328 ++incede;
525_newprocess(args) 2329 while (coro_nready >= incede && api_cede ())
526 SV * args
527 PROTOTYPE: $
528 CODE:
529 Coro__State coro;
530
531 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
532 croak ("Coro::State::_newprocess expects an arrayref");
533 2330 ;
534 New (0, coro, 1, struct coro);
535 2331
536 coro->mainstack = 0; /* actual work is done inside transfer */ 2332 sv_setsv (sv_activity, &PL_sv_undef);
537 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2333 if (coro_nready >= incede)
538
539 RETVAL = coro;
540 OUTPUT:
541 RETVAL
542
543void
544transfer(prev, next, flags = SAVE_DEFAV)
545 Coro::State_or_hashref prev
546 Coro::State_or_hashref next
547 int flags
548 PROTOTYPE: @
549 CODE:
550
551 transfer (aTHX_ prev, next, flags);
552
553void
554DESTROY(coro)
555 Coro::State coro
556 CODE:
557
558 if (coro->mainstack)
559 { 2334 {
560 struct coro temp; 2335 PUSHMARK (SP);
561 2336 PUTBACK;
562 SAVE(aTHX_ (&temp), SAVE_ALL); 2337 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
563 LOAD(aTHX_ coro); 2338 SPAGAIN;
564
565 destroy_stacks ();
566
567 LOAD((&temp)); /* this will get rid of defsv etc.. */
568 } 2339 }
569 2340
570 Safefree (coro); 2341 --incede;
2342}
571 2343
572void
573flush()
574 CODE:
575#ifdef MAY_FLUSH
576 flush_padlist_cache ();
577#endif
578 2344
579MODULE = Coro::State PACKAGE = Coro::Cont 2345MODULE = Coro::State PACKAGE = PerlIO::cede
580 2346
581# this is dirty and should be in it's own .xs 2347BOOT:
582 2348 PerlIO_define_layer (aTHX_ &PerlIO_cede);
583void
584result(...)
585 PROTOTYPE: @
586 CODE:
587 static SV *returnstk;
588 SV *sv;
589 AV *defav = GvAV (PL_defgv);
590 struct coro *prev, *next;
591
592 if (!returnstk)
593 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
594
595 /* set up @_ */
596 av_clear (defav);
597 av_fill (defav, items - 1);
598 while (items--)
599 av_store (defav, items, SvREFCNT_inc (ST(items)));
600
601 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
602 sv = av_pop ((AV *)SvRV (returnstk));
603 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
604 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
605 SvREFCNT_dec (sv);
606 transfer(prev, next, 0);
607

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