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Comparing Coro/Coro/State.xs (file contents):
Revision 1.18 by root, Thu Jul 26 03:46:15 2001 UTC vs.
Revision 1.254 by root, Fri Nov 7 20:27:47 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#include "libcoro/coro.c" 11#include "patchlevel.h"
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
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
6 25
7#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
8# include <unistd.h> 27# include <unistd.h>
9# include <sys/mman.h> 28# include <sys/mman.h>
10# ifndef MAP_ANON
11# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
12# define MAP_ANON MAP_ANONYMOUS 30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
13# else 32# else
14# undef HAVE_MMAP 33# undef HAVE_MMAP
15# endif 34# endif
16# 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
17#endif 43# endif
18
19#define MAY_FLUSH /* increases codesize */
20
21/* perl-related */
22#define TRANSFER_SAVE_DEFAV 0x00000001
23#define TRANSFER_SAVE_DEFSV 0x00000002
24#define TRANSFER_SAVE_ERRSV 0x00000004
25/* c-related */
26#define TRANSFER_SAVE_CCTXT 0x00000008
27#ifdef CORO_LAZY_STACK
28# define TRANSFER_LAZY_STACK 0x00000010
29#else 44#else
30# define TRANSFER_LAZY_STACK 0x00000000 45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
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
55
56/* the maximum number of idle cctx that will be pooled */
57static int cctx_max_idle = 4;
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
31#endif 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
32 85
33#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ 86/* 5.11 */
34 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) 87#ifndef CxHASARGS
88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
89#endif
35 90
36#define SUB_INIT "Coro::State::initialize" 91/* 5.10.0 */
37#define UCORO_STATE "_coro_state" 92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
38 95
39/* The next macro should delcare a variable stacklevel that contains and approximation 96/* 5.8.8 */
40 * to the current C stack pointer. It's property is that it changes with each call 97#ifndef GV_NOTQUAL
41 * and should be unique. */ 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
42#define dSTACKLEVEL void *stacklevel = &stacklevel 125#define STACKLEVEL ((void *)&stacklevel)
43 126
44#define labs(l) ((l) >= 0 ? (l) : -(l)) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
45 128
46/* this is actually not only the c stack but also c registers etc... */ 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 U32 cctx_gen;
168static size_t cctx_stacksize = CORO_STACKSIZE;
169static struct CoroAPI coroapi;
170static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env;
172static HV *coro_state_stash, *coro_stash;
173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
174
175static GV *irsgv; /* $/ */
176static GV *stdoutgv; /* *STDOUT */
177static SV *rv_diehook;
178static SV *rv_warnhook;
179static HV *hv_sig; /* %SIG */
180
181/* async_pool helper stuff */
182static SV *sv_pool_rss;
183static SV *sv_pool_size;
184static AV *av_async_pool;
185
186/* Coro::AnyEvent */
187static SV *sv_activity;
188
189static struct coro_cctx *cctx_first;
190static int cctx_count, cctx_idle;
191
192enum {
193 CC_MAPPED = 0x01,
194 CC_NOREUSE = 0x02, /* throw this away after tracing */
195 CC_TRACE = 0x04,
196 CC_TRACE_SUB = 0x08, /* trace sub calls */
197 CC_TRACE_LINE = 0x10, /* trace each statement */
198 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
199};
200
201/* this is a structure representing a c-level coroutine */
202typedef struct coro_cctx {
203 struct coro_cctx *next;
204
205 /* the stack */
206 void *sptr;
207 size_t ssize;
208
209 /* cpu state */
210 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
211 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
212 JMPENV *top_env;
213 coro_context cctx;
214
215 U32 gen;
216#if CORO_USE_VALGRIND
217 int valgrind_id;
218#endif
219 unsigned char flags;
220} coro_cctx;
221
222enum {
223 CF_RUNNING = 0x0001, /* coroutine is running */
224 CF_READY = 0x0002, /* coroutine is ready */
225 CF_NEW = 0x0004, /* has never been switched to */
226 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
227};
228
229/* the structure where most of the perl state is stored, overlaid on the cxstack */
47typedef struct { 230typedef struct {
48 int refcnt; /* pointer reference counter */ 231 SV *defsv;
49 int usecnt; /* shared by how many coroutines */ 232 AV *defav;
50 int gencnt; /* generation counter */ 233 SV *errsv;
234 SV *irsgv;
235#define VAR(name,type) type name;
236# include "state.h"
237#undef VAR
238} perl_slots;
51 239
52 coro_context cctx; 240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
53 241
54 void *sptr; 242/* this is a structure representing a perl-level coroutine */
55 long ssize; /* positive == mmap, otherwise malloc */
56} coro_stack;
57
58struct coro { 243struct coro {
59 /* the optional C context */ 244 /* the c coroutine allocated to this perl coroutine, if any */
60 coro_stack *stack; 245 coro_cctx *cctx;
61 void *cursp;
62 int gencnt;
63 246
64 /* optionally saved, might be zero */ 247 /* process data */
65 AV *defav;
66 SV *defsv;
67 SV *errsv;
68
69 /* saved global state not related to stacks */
70 U8 dowarn;
71
72 /* the stacks and related info (callchain etc..) */
73 PERL_SI *curstackinfo;
74 AV *curstack;
75 AV *mainstack; 248 AV *mainstack;
76 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
77 OP *op;
78 SV **curpad;
79 SV **stack_base;
80 SV **stack_max;
81 SV **tmps_stack;
82 I32 tmps_floor;
83 I32 tmps_ix;
84 I32 tmps_max;
85 I32 *markstack;
86 I32 *markstack_ptr;
87 I32 *markstack_max;
88 I32 *scopestack;
89 I32 scopestack_ix;
90 I32 scopestack_max;
91 ANY *savestack;
92 I32 savestack_ix;
93 I32 savestack_max;
94 OP **retstack;
95 I32 retstack_ix;
96 I32 retstack_max;
97 COP *curcop;
98 JMPENV start_env;
99 JMPENV *top_env;
100 250
101 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
102 AV *args; 252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255
256 /* statistics */
257 int usecount; /* number of transfers to this coro */
258
259 /* coro process data */
260 int prio;
261 SV *throw; /* exception to be thrown */
262
263 /* async_pool */
264 SV *saved_deffh;
265
266 /* linked list */
267 struct coro *next, *prev;
103}; 268};
104 269
105typedef struct coro *Coro__State; 270typedef struct coro *Coro__State;
106typedef struct coro *Coro__State_or_hashref; 271typedef struct coro *Coro__State_or_hashref;
107 272
108static AV *main_mainstack; /* used to differentiate between $main and others */ 273/** Coro ********************************************************************/
109static HV *coro_state_stash;
110static SV *ucoro_state_sv;
111static U32 ucoro_state_hash;
112static HV *padlist_cache;
113 274
114/* mostly copied from op.c:cv_clone2 */ 275#define PRIO_MAX 3
115STATIC AV * 276#define PRIO_HIGH 1
116clone_padlist (AV *protopadlist) 277#define PRIO_NORMAL 0
278#define PRIO_LOW -1
279#define PRIO_IDLE -3
280#define PRIO_MIN -4
281
282/* for Coro.pm */
283static SV *coro_current;
284static SV *coro_readyhook;
285static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
286static int coro_nready;
287static struct coro *coro_first;
288
289/** lowlevel stuff **********************************************************/
290
291static SV *
292coro_get_sv (pTHX_ const char *name, int create)
117{ 293{
118 AV *av; 294#if PERL_VERSION_ATLEAST (5,10,0)
119 I32 ix; 295 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
120 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 296 get_sv (name, create);
121 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 297#endif
122 SV **pname = AvARRAY (protopad_name); 298 return get_sv (name, create);
123 SV **ppad = AvARRAY (protopad); 299}
124 I32 fname = AvFILLp (protopad_name); 300
125 I32 fpad = AvFILLp (protopad); 301static AV *
302coro_get_av (pTHX_ const char *name, int create)
303{
304#if PERL_VERSION_ATLEAST (5,10,0)
305 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
306 get_av (name, create);
307#endif
308 return get_av (name, create);
309}
310
311static HV *
312coro_get_hv (pTHX_ const char *name, int create)
313{
314#if PERL_VERSION_ATLEAST (5,10,0)
315 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
316 get_hv (name, create);
317#endif
318 return get_hv (name, create);
319}
320
321static AV *
322coro_clone_padlist (pTHX_ CV *cv)
323{
324 AV *padlist = CvPADLIST (cv);
126 AV *newpadlist, *newpad_name, *newpad; 325 AV *newpadlist, *newpad;
127 SV **npad;
128
129 newpad_name = newAV ();
130 for (ix = fname; ix >= 0; ix--)
131 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
132
133 newpad = newAV ();
134 av_fill (newpad, AvFILLp (protopad));
135 npad = AvARRAY (newpad);
136 326
137 newpadlist = newAV (); 327 newpadlist = newAV ();
138 AvREAL_off (newpadlist); 328 AvREAL_off (newpadlist);
139 av_store (newpadlist, 0, (SV *) newpad_name); 329#if PERL_VERSION_ATLEAST (5,10,0)
330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
331#else
332 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
333#endif
334 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
335 --AvFILLp (padlist);
336
337 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
140 av_store (newpadlist, 1, (SV *) newpad); 338 av_store (newpadlist, 1, (SV *)newpad);
141 339
142 av = newAV (); /* will be @_ */ 340 return newpadlist;
143 av_extend (av, 0); 341}
144 av_store (newpad, 0, (SV *) av);
145 AvFLAGS (av) = AVf_REIFY;
146 342
147 for (ix = fpad; ix > 0; ix--) 343static void
344free_padlist (pTHX_ AV *padlist)
345{
346 /* may be during global destruction */
347 if (SvREFCNT (padlist))
148 { 348 {
149 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 349 I32 i = AvFILLp (padlist);
150 if (namesv && namesv != &PL_sv_undef) 350 while (i >= 0)
151 { 351 {
152 char *name = SvPVX (namesv); /* XXX */ 352 SV **svp = av_fetch (padlist, i--, FALSE);
153 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 353 if (svp)
154 { /* lexical from outside? */
155 npad[ix] = SvREFCNT_inc (ppad[ix]);
156 } 354 {
157 else
158 { /* our own lexical */
159 SV *sv; 355 SV *sv;
160 if (*name == '&') 356 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
161 sv = SvREFCNT_inc (ppad[ix]); 357 SvREFCNT_dec (sv);
162 else if (*name == '@') 358
163 sv = (SV *) newAV (); 359 SvREFCNT_dec (*svp);
164 else if (*name == '%')
165 sv = (SV *) newHV ();
166 else
167 sv = NEWSV (0, 0);
168 if (!SvPADBUSY (sv))
169 SvPADMY_on (sv);
170 npad[ix] = sv;
171 } 360 }
172 } 361 }
173 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
174 {
175 npad[ix] = SvREFCNT_inc (ppad[ix]);
176 }
177 else
178 {
179 SV *sv = NEWSV (0, 0);
180 SvPADTMP_on (sv);
181 npad[ix] = sv;
182 }
183 }
184 362
185#if 0 /* return -ENOTUNDERSTOOD */
186 /* Now that vars are all in place, clone nested closures. */
187
188 for (ix = fpad; ix > 0; ix--) {
189 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
190 if (namesv
191 && namesv != &PL_sv_undef
192 && !(SvFLAGS(namesv) & SVf_FAKE)
193 && *SvPVX(namesv) == '&'
194 && CvCLONE(ppad[ix]))
195 {
196 CV *kid = cv_clone((CV*)ppad[ix]);
197 SvREFCNT_dec(ppad[ix]);
198 CvCLONE_on(kid);
199 SvPADMY_on(kid);
200 npad[ix] = (SV*)kid;
201 }
202 }
203#endif
204
205 return newpadlist;
206}
207
208#ifdef MAY_FLUSH
209STATIC AV *
210free_padlist (AV *padlist)
211{
212 /* may be during global destruction */
213 if (SvREFCNT(padlist))
214 {
215 I32 i = AvFILLp(padlist);
216 while (i >= 0)
217 {
218 SV **svp = av_fetch(padlist, i--, FALSE);
219 SV *sv = svp ? *svp : Nullsv;
220 if (sv)
221 SvREFCNT_dec(sv);
222 }
223
224 SvREFCNT_dec((SV*)padlist); 363 SvREFCNT_dec ((SV*)padlist);
225 } 364 }
226} 365}
227#endif 366
367static int
368coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
369{
370 AV *padlist;
371 AV *av = (AV *)mg->mg_obj;
372
373 /* casting is fun. */
374 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
375 free_padlist (aTHX_ padlist);
376
377 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
378
379 return 0;
380}
381
382#define CORO_MAGIC_type_cv PERL_MAGIC_ext
383#define CORO_MAGIC_type_state PERL_MAGIC_ext
384
385static MGVTBL coro_cv_vtbl = {
386 0, 0, 0, 0,
387 coro_cv_free
388};
389
390#define CORO_MAGIC(sv, type) \
391 SvMAGIC (sv) \
392 ? SvMAGIC (sv)->mg_type == type \
393 ? SvMAGIC (sv) \
394 : mg_find (sv, type) \
395 : 0
396
397#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
398#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
399
400static struct coro *
401SvSTATE_ (pTHX_ SV *coro)
402{
403 HV *stash;
404 MAGIC *mg;
405
406 if (SvROK (coro))
407 coro = SvRV (coro);
408
409 if (expect_false (SvTYPE (coro) != SVt_PVHV))
410 croak ("Coro::State object required");
411
412 stash = SvSTASH (coro);
413 if (expect_false (stash != coro_stash && stash != coro_state_stash))
414 {
415 /* very slow, but rare, check */
416 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
417 croak ("Coro::State object required");
418 }
419
420 mg = CORO_MAGIC_state (coro);
421 return (struct coro *)mg->mg_ptr;
422}
423
424#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
228 425
229/* the next two functions merely cache the padlists */ 426/* the next two functions merely cache the padlists */
230STATIC void 427static void
231get_padlist (CV *cv) 428get_padlist (pTHX_ CV *cv)
232{ 429{
233 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 430 MAGIC *mg = CORO_MAGIC_cv (cv);
431 AV *av;
234 432
235 if (he && AvFILLp ((AV *)*he) >= 0) 433 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
236 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 434 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
237 else 435 else
238 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
239}
240
241STATIC void
242put_padlist (CV *cv)
243{
244 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
245
246 if (SvTYPE (*he) != SVt_PVAV)
247 { 436 {
437#if CORO_PREFER_PERL_FUNCTIONS
438 /* this is probably cleaner? but also slower! */
439 /* in practise, it seems to be less stable */
440 CV *cp = Perl_cv_clone (cv);
441 CvPADLIST (cv) = CvPADLIST (cp);
442 CvPADLIST (cp) = 0;
248 SvREFCNT_dec (*he); 443 SvREFCNT_dec (cp);
249 *he = (SV *)newAV (); 444#else
445 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
446#endif
250 } 447 }
251
252 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
253} 448}
254
255#ifdef MAY_FLUSH
256STATIC void
257flush_padlist_cache ()
258{
259 HV *hv = padlist_cache;
260 padlist_cache = newHV ();
261
262 if (hv_iterinit (hv))
263 {
264 HE *he;
265 AV *padlist;
266
267 while (!!(he = hv_iternext (hv)))
268 {
269 AV *av = (AV *)HeVAL(he);
270
271 /* casting is fun. */
272 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273 free_padlist (padlist);
274 }
275 }
276
277 SvREFCNT_dec (hv);
278}
279#endif
280
281#define SB do {
282#define SE } while (0)
283
284#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
285#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
286
287#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
288 449
289static void 450static void
451put_padlist (pTHX_ CV *cv)
452{
453 MAGIC *mg = CORO_MAGIC_cv (cv);
454 AV *av;
455
456 if (expect_false (!mg))
457 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
458
459 av = (AV *)mg->mg_obj;
460
461 if (expect_false (AvFILLp (av) >= AvMAX (av)))
462 av_extend (av, AvMAX (av) + 1);
463
464 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
465}
466
467/** load & save, init *******************************************************/
468
469static void
290load_state(pTHX_ Coro__State c) 470load_perl (pTHX_ Coro__State c)
291{ 471{
292 PL_dowarn = c->dowarn; 472 perl_slots *slot = c->slot;
473 c->slot = 0;
293 474
294 PL_curstackinfo = c->curstackinfo;
295 PL_curstack = c->curstack;
296 PL_mainstack = c->mainstack; 475 PL_mainstack = c->mainstack;
297 PL_stack_sp = c->stack_sp;
298 PL_op = c->op;
299 PL_curpad = c->curpad;
300 PL_stack_base = c->stack_base;
301 PL_stack_max = c->stack_max;
302 PL_tmps_stack = c->tmps_stack;
303 PL_tmps_floor = c->tmps_floor;
304 PL_tmps_ix = c->tmps_ix;
305 PL_tmps_max = c->tmps_max;
306 PL_markstack = c->markstack;
307 PL_markstack_ptr = c->markstack_ptr;
308 PL_markstack_max = c->markstack_max;
309 PL_scopestack = c->scopestack;
310 PL_scopestack_ix = c->scopestack_ix;
311 PL_scopestack_max = c->scopestack_max;
312 PL_savestack = c->savestack;
313 PL_savestack_ix = c->savestack_ix;
314 PL_savestack_max = c->savestack_max;
315 PL_retstack = c->retstack;
316 PL_retstack_ix = c->retstack_ix;
317 PL_retstack_max = c->retstack_max;
318 PL_curcop = c->curcop;
319 PL_start_env = c->start_env;
320 PL_top_env = c->top_env;
321 476
322 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 477 GvSV (PL_defgv) = slot->defsv;
323 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 478 GvAV (PL_defgv) = slot->defav;
324 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 479 GvSV (PL_errgv) = slot->errsv;
480 GvSV (irsgv) = slot->irsgv;
481
482 #define VAR(name,type) PL_ ## name = slot->name;
483 # include "state.h"
484 #undef VAR
325 485
326 { 486 {
327 dSP; 487 dSP;
488
328 CV *cv; 489 CV *cv;
329 490
330 /* now do the ugly restore mess */ 491 /* now do the ugly restore mess */
331 while ((cv = (CV *)POPs)) 492 while (expect_true (cv = (CV *)POPs))
332 { 493 {
333 AV *padlist = (AV *)POPs;
334
335 if (padlist)
336 {
337 put_padlist (cv); /* mark this padlist as available */ 494 put_padlist (aTHX_ cv); /* mark this padlist as available */
338 CvPADLIST(cv) = padlist; 495 CvDEPTH (cv) = PTR2IV (POPs);
339#ifdef USE_THREADS 496 CvPADLIST (cv) = (AV *)POPs;
340 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
341#endif
342 }
343
344 ++CvDEPTH(cv);
345 } 497 }
346 498
347 PUTBACK; 499 PUTBACK;
348 } 500 }
349} 501}
350 502
351static void 503static void
352save_state(pTHX_ Coro__State c, int flags) 504save_perl (pTHX_ Coro__State c)
353{ 505{
354 { 506 {
355 dSP; 507 dSP;
356 I32 cxix = cxstack_ix; 508 I32 cxix = cxstack_ix;
357 PERL_CONTEXT *ccstk = cxstack; 509 PERL_CONTEXT *ccstk = cxstack;
… …
360 /* 512 /*
361 * the worst thing you can imagine happens first - we have to save 513 * the worst thing you can imagine happens first - we have to save
362 * (and reinitialize) all cv's in the whole callchain :( 514 * (and reinitialize) all cv's in the whole callchain :(
363 */ 515 */
364 516
365 PUSHs (Nullsv); 517 XPUSHs (Nullsv);
366 /* this loop was inspired by pp_caller */ 518 /* this loop was inspired by pp_caller */
367 for (;;) 519 for (;;)
368 { 520 {
369 do 521 while (expect_true (cxix >= 0))
370 { 522 {
371 PERL_CONTEXT *cx = &ccstk[cxix--]; 523 PERL_CONTEXT *cx = &ccstk[cxix--];
372 524
373 if (CxTYPE(cx) == CXt_SUB) 525 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
374 { 526 {
375 CV *cv = cx->blk_sub.cv; 527 CV *cv = cx->blk_sub.cv;
528
376 if (CvDEPTH(cv)) 529 if (expect_true (CvDEPTH (cv)))
377 { 530 {
378#ifdef USE_THREADS
379 /*XPUSHs ((SV *)CvOWNER(cv));*/
380 /*CvOWNER(cv) = 0;*/
381 /*error must unlock this cv etc.. etc...*/
382#endif
383 EXTEND (SP, CvDEPTH(cv)*2); 531 EXTEND (SP, 3);
384
385 while (--CvDEPTH(cv))
386 {
387 /* this tells the restore code to increment CvDEPTH */
388 PUSHs (Nullsv);
389 PUSHs ((SV *)cv);
390 }
391
392 PUSHs ((SV *)CvPADLIST(cv)); 532 PUSHs ((SV *)CvPADLIST (cv));
533 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
393 PUSHs ((SV *)cv); 534 PUSHs ((SV *)cv);
394 535
395 get_padlist (cv); /* this is a monster */ 536 CvDEPTH (cv) = 0;
537 get_padlist (aTHX_ cv);
396 } 538 }
397 } 539 }
398 else if (CxTYPE(cx) == CXt_FORMAT)
399 {
400 /* I never used formats, so how should I know how these are implemented? */
401 /* my bold guess is as a simple, plain sub... */
402 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403 }
404 } 540 }
405 while (cxix >= 0);
406 541
407 if (top_si->si_type == PERLSI_MAIN) 542 if (expect_true (top_si->si_type == PERLSI_MAIN))
408 break; 543 break;
409 544
410 top_si = top_si->si_prev; 545 top_si = top_si->si_prev;
411 ccstk = top_si->si_cxstack; 546 ccstk = top_si->si_cxstack;
412 cxix = top_si->si_cxix; 547 cxix = top_si->si_cxix;
413 } 548 }
414 549
415 PUTBACK; 550 PUTBACK;
416 } 551 }
417 552
418 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 553 /* allocate some space on the context stack for our purposes */
419 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 554 /* we manually unroll here, as usually 2 slots is enough */
420 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 555 if (SLOT_COUNT >= 1) CXINC;
556 if (SLOT_COUNT >= 2) CXINC;
557 if (SLOT_COUNT >= 3) CXINC;
558 {
559 int i;
560 for (i = 3; i < SLOT_COUNT; ++i)
561 CXINC;
562 }
563 cxstack_ix -= SLOT_COUNT; /* undo allocation */
421 564
422 /* I have not the slightest idea of why av_reify is necessary */
423 /* but if it's missing the defav contents magically get replaced sometimes */
424 if (c->defav)
425 av_reify (c->defav);
426
427 c->dowarn = PL_dowarn;
428
429 c->curstackinfo = PL_curstackinfo;
430 c->curstack = PL_curstack;
431 c->mainstack = PL_mainstack; 565 c->mainstack = PL_mainstack;
432 c->stack_sp = PL_stack_sp; 566
433 c->op = PL_op; 567 {
434 c->curpad = PL_curpad; 568 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
435 c->stack_base = PL_stack_base; 569
436 c->stack_max = PL_stack_max; 570 slot->defav = GvAV (PL_defgv);
437 c->tmps_stack = PL_tmps_stack; 571 slot->defsv = DEFSV;
438 c->tmps_floor = PL_tmps_floor; 572 slot->errsv = ERRSV;
439 c->tmps_ix = PL_tmps_ix; 573 slot->irsgv = GvSV (irsgv);
440 c->tmps_max = PL_tmps_max; 574
441 c->markstack = PL_markstack; 575 #define VAR(name,type) slot->name = PL_ ## name;
442 c->markstack_ptr = PL_markstack_ptr; 576 # include "state.h"
443 c->markstack_max = PL_markstack_max; 577 #undef VAR
444 c->scopestack = PL_scopestack; 578 }
445 c->scopestack_ix = PL_scopestack_ix;
446 c->scopestack_max = PL_scopestack_max;
447 c->savestack = PL_savestack;
448 c->savestack_ix = PL_savestack_ix;
449 c->savestack_max = PL_savestack_max;
450 c->retstack = PL_retstack;
451 c->retstack_ix = PL_retstack_ix;
452 c->retstack_max = PL_retstack_max;
453 c->curcop = PL_curcop;
454 c->start_env = PL_start_env;
455 c->top_env = PL_top_env;
456} 579}
457 580
458/* 581/*
459 * allocate various perl stacks. This is an exact copy 582 * allocate various perl stacks. This is an exact copy
460 * of perl.c:init_stacks, except that it uses less memory 583 * of perl.c:init_stacks, except that it uses less memory
461 * on the assumption that coroutines do not usually need 584 * on the (sometimes correct) assumption that coroutines do
462 * a lot of stackspace. 585 * not usually need a lot of stackspace.
463 */ 586 */
464STATIC void 587#if CORO_PREFER_PERL_FUNCTIONS
588# define coro_init_stacks init_stacks
589#else
590static void
465coro_init_stacks (pTHX) 591coro_init_stacks (pTHX)
466{ 592{
467 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 593 PL_curstackinfo = new_stackinfo(32, 8);
468 PL_curstackinfo->si_type = PERLSI_MAIN; 594 PL_curstackinfo->si_type = PERLSI_MAIN;
469 PL_curstack = PL_curstackinfo->si_stack; 595 PL_curstack = PL_curstackinfo->si_stack;
470 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 596 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
471 597
472 PL_stack_base = AvARRAY(PL_curstack); 598 PL_stack_base = AvARRAY(PL_curstack);
473 PL_stack_sp = PL_stack_base; 599 PL_stack_sp = PL_stack_base;
474 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 600 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
475 601
476 New(50,PL_tmps_stack,96,SV*); 602 New(50,PL_tmps_stack,32,SV*);
477 PL_tmps_floor = -1; 603 PL_tmps_floor = -1;
478 PL_tmps_ix = -1; 604 PL_tmps_ix = -1;
479 PL_tmps_max = 96; 605 PL_tmps_max = 32;
480 606
481 New(54,PL_markstack,16,I32); 607 New(54,PL_markstack,16,I32);
482 PL_markstack_ptr = PL_markstack; 608 PL_markstack_ptr = PL_markstack;
483 PL_markstack_max = PL_markstack + 16; 609 PL_markstack_max = PL_markstack + 16;
484 610
611#ifdef SET_MARK_OFFSET
485 SET_MARK_OFFSET; 612 SET_MARK_OFFSET;
613#endif
486 614
487 New(54,PL_scopestack,16,I32); 615 New(54,PL_scopestack,8,I32);
488 PL_scopestack_ix = 0; 616 PL_scopestack_ix = 0;
489 PL_scopestack_max = 16; 617 PL_scopestack_max = 8;
490 618
491 New(54,PL_savestack,96,ANY); 619 New(54,PL_savestack,24,ANY);
492 PL_savestack_ix = 0; 620 PL_savestack_ix = 0;
493 PL_savestack_max = 96; 621 PL_savestack_max = 24;
494 622
623#if !PERL_VERSION_ATLEAST (5,10,0)
495 New(54,PL_retstack,8,OP*); 624 New(54,PL_retstack,4,OP*);
496 PL_retstack_ix = 0; 625 PL_retstack_ix = 0;
497 PL_retstack_max = 8; 626 PL_retstack_max = 4;
627#endif
498} 628}
629#endif
499 630
500/* 631/*
501 * destroy the stacks, the callchain etc... 632 * destroy the stacks, the callchain etc...
502 * still there is a memleak of 128 bytes...
503 */ 633 */
504STATIC void 634static void
505destroy_stacks(pTHX) 635coro_destruct_stacks (pTHX)
506{ 636{
507 /* is this ugly, I ask? */
508 while (PL_scopestack_ix)
509 LEAVE;
510
511 /* sure it is, but more important: is it correct?? :/ */
512 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
513 FREETMPS;
514
515 while (PL_curstackinfo->si_next) 637 while (PL_curstackinfo->si_next)
516 PL_curstackinfo = PL_curstackinfo->si_next; 638 PL_curstackinfo = PL_curstackinfo->si_next;
517 639
518 while (PL_curstackinfo) 640 while (PL_curstackinfo)
519 { 641 {
520 PERL_SI *p = PL_curstackinfo->si_prev; 642 PERL_SI *p = PL_curstackinfo->si_prev;
521 643
522 { 644 if (!IN_DESTRUCT)
523 dSP;
524 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
525 PUTBACK; /* possibly superfluous */
526 }
527
528 dounwind(-1);
529
530 SvREFCNT_dec(PL_curstackinfo->si_stack); 645 SvREFCNT_dec (PL_curstackinfo->si_stack);
646
531 Safefree(PL_curstackinfo->si_cxstack); 647 Safefree (PL_curstackinfo->si_cxstack);
532 Safefree(PL_curstackinfo); 648 Safefree (PL_curstackinfo);
533 PL_curstackinfo = p; 649 PL_curstackinfo = p;
534 } 650 }
535 651
536 Safefree(PL_tmps_stack); 652 Safefree (PL_tmps_stack);
537 Safefree(PL_markstack); 653 Safefree (PL_markstack);
538 Safefree(PL_scopestack); 654 Safefree (PL_scopestack);
539 Safefree(PL_savestack); 655 Safefree (PL_savestack);
656#if !PERL_VERSION_ATLEAST (5,10,0)
540 Safefree(PL_retstack); 657 Safefree (PL_retstack);
658#endif
659}
660
661static size_t
662coro_rss (pTHX_ struct coro *coro)
663{
664 size_t rss = sizeof (*coro);
665
666 if (coro->mainstack)
667 {
668 perl_slots tmp_slot;
669 perl_slots *slot;
670
671 if (coro->flags & CF_RUNNING)
672 {
673 slot = &tmp_slot;
674
675 #define VAR(name,type) slot->name = PL_ ## name;
676 # include "state.h"
677 #undef VAR
678 }
679 else
680 slot = coro->slot;
681
682 if (slot)
683 {
684 rss += sizeof (slot->curstackinfo);
685 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
686 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
687 rss += slot->tmps_max * sizeof (SV *);
688 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
689 rss += slot->scopestack_max * sizeof (I32);
690 rss += slot->savestack_max * sizeof (ANY);
691
692#if !PERL_VERSION_ATLEAST (5,10,0)
693 rss += slot->retstack_max * sizeof (OP *);
694#endif
695 }
696 }
697
698 return rss;
699}
700
701/** coroutine stack handling ************************************************/
702
703static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
704static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
705static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
706
707/* apparently < 5.8.8 */
708#ifndef MgPV_nolen_const
709#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
710 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
711 (const char*)(mg)->mg_ptr)
712#endif
713
714/*
715 * This overrides the default magic get method of %SIG elements.
716 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
717 * and instead of tryign to save and restore the hash elements, we just provide
718 * readback here.
719 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
720 * not expecting this to actually change the hook. This is a potential problem
721 * when a schedule happens then, but we ignore this.
722 */
723static int
724coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
725{
726 const char *s = MgPV_nolen_const (mg);
727
728 if (*s == '_')
729 {
730 SV **svp = 0;
731
732 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
733 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
734
735 if (svp)
736 {
737 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
738 return 0;
739 }
740 }
741
742 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
743}
744
745static int
746coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
747{
748 const char *s = MgPV_nolen_const (mg);
749
750 if (*s == '_')
751 {
752 SV **svp = 0;
753
754 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
755 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
756
757 if (svp)
758 {
759 SV *old = *svp;
760 *svp = 0;
761 SvREFCNT_dec (old);
762 return 0;
763 }
764 }
765
766 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
767}
768
769static int
770coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
771{
772 const char *s = MgPV_nolen_const (mg);
773
774 if (*s == '_')
775 {
776 SV **svp = 0;
777
778 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
779 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
780
781 if (svp)
782 {
783 SV *old = *svp;
784 *svp = newSVsv (sv);
785 SvREFCNT_dec (old);
786 return 0;
787 }
788 }
789
790 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
541} 791}
542 792
543static void 793static void
544allocate_stack (Coro__State ctx, int alloc) 794coro_setup (pTHX_ struct coro *coro)
545{
546 coro_stack *stack;
547
548 New (0, stack, 1, coro_stack);
549
550 stack->refcnt = 1;
551 stack->usecnt = 1;
552 stack->gencnt = ctx->gencnt = 0;
553 if (alloc)
554 {
555#ifdef HAVE_MMAP
556 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
558 if (stack->sptr == (void *)-1)
559#endif
560 {
561 /*FIXME*//*D*//* reasonable stack size! */
562 stack->ssize = -4096 * sizeof (long);
563 New (0, stack->sptr, 4096, long);
564 }
565 }
566 else
567 stack->sptr = 0;
568
569 ctx->stack = stack;
570}
571
572static void
573deallocate_stack (Coro__State ctx)
574{
575 coro_stack *stack = ctx->stack;
576
577 ctx->stack = 0;
578
579 if (stack)
580 {
581 if (!--stack->refcnt)
582 {
583#ifdef HAVE_MMAP
584 if (stack->ssize > 0 && stack->sptr)
585 munmap (stack->sptr, stack->ssize);
586 else
587#else
588 Safefree (stack->sptr);
589#endif
590 Safefree (stack);
591 }
592 else if (ctx->gencnt == stack->gencnt)
593 --stack->usecnt;
594 }
595}
596
597static void
598setup_coro (void *arg)
599{ 795{
600 /* 796 /*
601 * emulate part of the perl startup here. 797 * emulate part of the perl startup here.
602 */ 798 */
603 dSP;
604 Coro__State ctx = (Coro__State)arg;
605 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606
607 coro_init_stacks (aTHX); 799 coro_init_stacks (aTHX);
608 JMPENV_BOOTSTRAP; 800
801 PL_runops = RUNOPS_DEFAULT;
802 PL_curcop = &PL_compiling;
803 PL_in_eval = EVAL_NULL;
804 PL_comppad = 0;
805 PL_curpm = 0;
806 PL_curpad = 0;
807 PL_localizing = 0;
808 PL_dirty = 0;
809 PL_restartop = 0;
810#if PERL_VERSION_ATLEAST (5,10,0)
811 PL_parser = 0;
812#endif
813
814 /* recreate the die/warn hooks */
815 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
816 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
817
818 GvSV (PL_defgv) = newSV (0);
819 GvAV (PL_defgv) = coro->args; coro->args = 0;
820 GvSV (PL_errgv) = newSV (0);
821 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
822 PL_rs = newSVsv (GvSV (irsgv));
823 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
824
825 {
826 dSP;
827 LOGOP myop;
828
829 Zero (&myop, 1, LOGOP);
830 myop.op_next = Nullop;
831 myop.op_flags = OPf_WANT_VOID;
832
833 PUSHMARK (SP);
834 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
835 PUTBACK;
836 PL_op = (OP *)&myop;
837 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
609 SPAGAIN; 838 SPAGAIN;
839 }
610 840
611 /*PL_curcop = 0;*/ 841 /* this newly created coroutine might be run on an existing cctx which most
842 * likely was suspended in set_stacklevel, called from entersub.
843 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
844 * so we ENTER here for symmetry
845 */
846 ENTER;
847}
848
849static void
850coro_destruct (pTHX_ struct coro *coro)
851{
852 if (!IN_DESTRUCT)
853 {
854 /* restore all saved variables and stuff */
855 LEAVE_SCOPE (0);
856 assert (PL_tmps_floor == -1);
857
858 /* free all temporaries */
859 FREETMPS;
860 assert (PL_tmps_ix == -1);
861
862 /* unwind all extra stacks */
863 POPSTACK_TO (PL_mainstack);
864
865 /* unwind main stack */
866 dounwind (-1);
867 }
868
869 SvREFCNT_dec (GvSV (PL_defgv));
612 SvREFCNT_dec (GvAV (PL_defgv)); 870 SvREFCNT_dec (GvAV (PL_defgv));
613 GvAV (PL_defgv) = ctx->args; 871 SvREFCNT_dec (GvSV (PL_errgv));
872 SvREFCNT_dec (PL_defoutgv);
873 SvREFCNT_dec (PL_rs);
874 SvREFCNT_dec (GvSV (irsgv));
614 875
615 if (ctx->stack) 876 SvREFCNT_dec (PL_diehook);
616 { 877 SvREFCNT_dec (PL_warnhook);
617 ctx->cursp = 0; 878
879 SvREFCNT_dec (coro->saved_deffh);
880 SvREFCNT_dec (coro->throw);
618 881
619 PUSHMARK(SP); 882 coro_destruct_stacks (aTHX);
620 PUTBACK;
621 (void) call_sv (sub_init, G_VOID|G_NOARGS);
622 croak ("FATAL: CCTXT coroutine returned!");
623 }
624 else
625 {
626 UNOP myop;
627
628 PL_op = (OP *)&myop;
629
630 Zero(&myop, 1, UNOP);
631 myop.op_next = Nullop;
632 myop.op_flags = OPf_WANT_VOID;
633
634 PUSHMARK(SP);
635 XPUSHs (sub_init);
636 /*
637 * the next line is slightly wrong, as PL_op->op_next
638 * is actually being executed so we skip the first op.
639 * that doesn't matter, though, since it is only
640 * pp_nextstate and we never return...
641 * ah yes, and I don't care anyways ;)
642 */
643 PUTBACK;
644 PL_op = pp_entersub();
645 SPAGAIN;
646
647 ENTER; /* necessary e.g. for dounwind */
648 }
649} 883}
650 884
651static void 885static void
652continue_coro (void *arg) 886free_coro_mortal (pTHX)
653{ 887{
654 /* 888 if (expect_true (coro_mortal))
655 * this is a _very_ stripped down perl interpreter ;) 889 {
656 */ 890 SvREFCNT_dec (coro_mortal);
657 Coro__State ctx = (Coro__State)arg; 891 coro_mortal = 0;
658
659 ctx->cursp = 0;
660 PL_op = PL_op->op_next;
661 CALLRUNOPS(aTHX);
662 /*NORETURN*/
663 abort ();
664}
665
666STATIC void
667transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
668{
669 dSP;
670 dSTACKLEVEL;
671
672 if (prev != next)
673 { 892 }
674 if (next->mainstack) 893}
894
895static int
896runops_trace (pTHX)
897{
898 COP *oldcop = 0;
899 int oldcxix = -2;
900 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
901 coro_cctx *cctx = coro->cctx;
902
903 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
904 {
905 PERL_ASYNC_CHECK ();
906
907 if (cctx->flags & CC_TRACE_ALL)
675 { 908 {
676 SAVE (prev, flags); 909 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
677 LOAD (next);
678
679 /* mark this state as in-use */
680 next->mainstack = 0;
681 next->tmps_ix = -2;
682
683 /* stacklevel changed? if yes, grab the stack for us! */
684 if (flags & TRANSFER_SAVE_CCTXT)
685 { 910 {
686 if (!prev->stack) 911 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
687 allocate_stack (prev, 0); 912 SV **bot, **top;
688 else if (prev->cursp != stacklevel 913 AV *av = newAV (); /* return values */
689 && prev->stack->usecnt > 1) 914 SV **cb;
915 dSP;
916
917 GV *gv = CvGV (cx->blk_sub.cv);
918 SV *fullname = sv_2mortal (newSV (0));
919 if (isGV (gv))
920 gv_efullname3 (fullname, gv, 0);
921
922 bot = PL_stack_base + cx->blk_oldsp + 1;
923 top = cx->blk_gimme == G_ARRAY ? SP + 1
924 : cx->blk_gimme == G_SCALAR ? bot + 1
925 : bot;
926
927 av_extend (av, top - bot);
928 while (bot < top)
929 av_push (av, SvREFCNT_inc_NN (*bot++));
930
931 PL_runops = RUNOPS_DEFAULT;
932 ENTER;
933 SAVETMPS;
934 EXTEND (SP, 3);
935 PUSHMARK (SP);
936 PUSHs (&PL_sv_no);
937 PUSHs (fullname);
938 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
939 PUTBACK;
940 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
941 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
942 SPAGAIN;
943 FREETMPS;
944 LEAVE;
945 PL_runops = runops_trace;
946 }
947
948 if (oldcop != PL_curcop)
949 {
950 oldcop = PL_curcop;
951
952 if (PL_curcop != &PL_compiling)
690 { 953 {
691 prev->gencnt = ++prev->stack->gencnt; 954 SV **cb;
692 prev->stack->usecnt = 1;
693 }
694 955
695 /* has our stack been invalidated? */ 956 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
696 if (next->stack && next->stack->gencnt != next->gencnt)
697 { 957 {
698 deallocate_stack (next); 958 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
699 allocate_stack (next, 1); 959
700 coro_create (&(next->stack->cctx), 960 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
701 continue_coro, (void *)next, 961 {
702 next->stack->sptr, labs (next->stack->ssize)); 962 runops_proc_t old_runops = PL_runops;
963 dSP;
964 GV *gv = CvGV (cx->blk_sub.cv);
965 SV *fullname = sv_2mortal (newSV (0));
966
967 if (isGV (gv))
968 gv_efullname3 (fullname, gv, 0);
969
970 PL_runops = RUNOPS_DEFAULT;
971 ENTER;
972 SAVETMPS;
973 EXTEND (SP, 3);
974 PUSHMARK (SP);
975 PUSHs (&PL_sv_yes);
976 PUSHs (fullname);
977 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
978 PUTBACK;
979 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
980 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
981 SPAGAIN;
982 FREETMPS;
983 LEAVE;
984 PL_runops = runops_trace;
985 }
986
987 oldcxix = cxstack_ix;
703 } 988 }
704 989
705 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 990 if (cctx->flags & CC_TRACE_LINE)
706 }
707
708 }
709 else if (next->tmps_ix == -2)
710 croak ("tried to transfer to running coroutine");
711 else
712 {
713 SAVE (prev, -1); /* first get rid of the old state */
714
715 if (flags & TRANSFER_SAVE_CCTXT)
716 {
717 if (!prev->stack)
718 allocate_stack (prev, 0);
719
720 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
721 { 991 {
722 setup_coro (next); 992 dSP;
723 993
724 prev->stack->refcnt++; 994 PL_runops = RUNOPS_DEFAULT;
725 prev->stack->usecnt++; 995 ENTER;
726 next->stack = prev->stack; 996 SAVETMPS;
727 next->gencnt = prev->gencnt; 997 EXTEND (SP, 3);
998 PL_runops = RUNOPS_DEFAULT;
999 PUSHMARK (SP);
1000 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1001 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1002 PUTBACK;
1003 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1004 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1005 SPAGAIN;
1006 FREETMPS;
1007 LEAVE;
1008 PL_runops = runops_trace;
728 } 1009 }
729 else
730 {
731 allocate_stack (next, 1);
732 coro_create (&(next->stack->cctx),
733 setup_coro, (void *)next,
734 next->stack->sptr, labs (next->stack->ssize));
735 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
736 } 1010 }
737 } 1011 }
738 else
739 setup_coro (next);
740 } 1012 }
741 } 1013 }
742 1014
743 next->cursp = stacklevel; 1015 TAINT_NOT;
1016 return 0;
744} 1017}
745 1018
1019/* inject a fake call to Coro::State::_cctx_init into the execution */
1020/* _cctx_init should be careful, as it could be called at almost any time */
1021/* during execution of a perl program */
1022static void NOINLINE
1023cctx_prepare (pTHX_ coro_cctx *cctx)
1024{
1025 dSP;
1026 LOGOP myop;
1027
1028 PL_top_env = &PL_start_env;
1029
1030 if (cctx->flags & CC_TRACE)
1031 PL_runops = runops_trace;
1032
1033 Zero (&myop, 1, LOGOP);
1034 myop.op_next = PL_op;
1035 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1036
1037 PUSHMARK (SP);
1038 EXTEND (SP, 2);
1039 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1040 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1041 PUTBACK;
1042 PL_op = (OP *)&myop;
1043 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1044 SPAGAIN;
1045}
1046
1047/*
1048 * this is a _very_ stripped down perl interpreter ;)
1049 */
1050static void
1051cctx_run (void *arg)
1052{
1053 dTHX;
1054
1055 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1056 UNLOCK;
1057
1058 /* we now skip the entersub that lead to transfer() */
1059 PL_op = PL_op->op_next;
1060
1061 /* inject a fake subroutine call to cctx_init */
1062 cctx_prepare (aTHX_ (coro_cctx *)arg);
1063
1064 /* somebody or something will hit me for both perl_run and PL_restartop */
1065 PL_restartop = PL_op;
1066 perl_run (PL_curinterp);
1067
1068 /*
1069 * If perl-run returns we assume exit() was being called or the coro
1070 * fell off the end, which seems to be the only valid (non-bug)
1071 * reason for perl_run to return. We try to exit by jumping to the
1072 * bootstrap-time "top" top_env, as we cannot restore the "main"
1073 * coroutine as Coro has no such concept
1074 */
1075 PL_top_env = main_top_env;
1076 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1077}
1078
1079static coro_cctx *
1080cctx_new ()
1081{
1082 coro_cctx *cctx;
1083 void *stack_start;
1084 size_t stack_size;
1085
1086 ++cctx_count;
1087 Newz (0, cctx, 1, coro_cctx);
1088
1089 cctx->gen = cctx_gen;
1090
1091#if HAVE_MMAP
1092 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1093 /* mmap supposedly does allocate-on-write for us */
1094 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1095
1096 if (cctx->sptr != (void *)-1)
1097 {
1098# if CORO_STACKGUARD
1099 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1100# endif
1101 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1102 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1103 cctx->flags |= CC_MAPPED;
1104 }
1105 else
1106#endif
1107 {
1108 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1109 New (0, cctx->sptr, cctx_stacksize, long);
1110
1111 if (!cctx->sptr)
1112 {
1113 perror ("FATAL: unable to allocate stack for coroutine");
1114 _exit (EXIT_FAILURE);
1115 }
1116
1117 stack_start = cctx->sptr;
1118 stack_size = cctx->ssize;
1119 }
1120
1121 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1122 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1123
1124 return cctx;
1125}
1126
1127static void
1128cctx_destroy (coro_cctx *cctx)
1129{
1130 if (!cctx)
1131 return;
1132
1133 --cctx_count;
1134 coro_destroy (&cctx->cctx);
1135
1136 /* coro_transfer creates new, empty cctx's */
1137 if (cctx->sptr)
1138 {
1139#if CORO_USE_VALGRIND
1140 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1141#endif
1142
1143#if HAVE_MMAP
1144 if (cctx->flags & CC_MAPPED)
1145 munmap (cctx->sptr, cctx->ssize);
1146 else
1147#endif
1148 Safefree (cctx->sptr);
1149 }
1150
1151 Safefree (cctx);
1152}
1153
1154/* wether this cctx should be destructed */
1155#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1156
1157static coro_cctx *
1158cctx_get (pTHX)
1159{
1160 while (expect_true (cctx_first))
1161 {
1162 coro_cctx *cctx = cctx_first;
1163 cctx_first = cctx->next;
1164 --cctx_idle;
1165
1166 if (expect_true (!CCTX_EXPIRED (cctx)))
1167 return cctx;
1168
1169 cctx_destroy (cctx);
1170 }
1171
1172 return cctx_new ();
1173}
1174
1175static void
1176cctx_put (coro_cctx *cctx)
1177{
1178 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1179
1180 /* free another cctx if overlimit */
1181 if (expect_false (cctx_idle >= cctx_max_idle))
1182 {
1183 coro_cctx *first = cctx_first;
1184 cctx_first = first->next;
1185 --cctx_idle;
1186
1187 cctx_destroy (first);
1188 }
1189
1190 ++cctx_idle;
1191 cctx->next = cctx_first;
1192 cctx_first = cctx;
1193}
1194
1195/** coroutine switching *****************************************************/
1196
1197static void
1198transfer_check (pTHX_ struct coro *prev, struct coro *next)
1199{
1200 if (expect_true (prev != next))
1201 {
1202 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1203 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1204
1205 if (expect_false (next->flags & CF_RUNNING))
1206 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1207
1208 if (expect_false (next->flags & CF_DESTROYED))
1209 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1210
1211#if !PERL_VERSION_ATLEAST (5,10,0)
1212 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1213 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1214#endif
1215 }
1216}
1217
1218/* always use the TRANSFER macro */
1219static void NOINLINE
1220transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1221{
1222 dSTACKLEVEL;
1223
1224 /* sometimes transfer is only called to set idle_sp */
1225 if (expect_false (!next))
1226 {
1227 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1228 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1229 }
1230 else if (expect_true (prev != next))
1231 {
1232 static volatile int has_throw;
1233 coro_cctx *prev__cctx;
1234
1235 if (expect_false (prev->flags & CF_NEW))
1236 {
1237 /* create a new empty/source context */
1238 ++cctx_count;
1239 New (0, prev->cctx, 1, coro_cctx);
1240 prev->cctx->sptr = 0;
1241 coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1242
1243 prev->flags &= ~CF_NEW;
1244 prev->flags |= CF_RUNNING;
1245 }
1246
1247 prev->flags &= ~CF_RUNNING;
1248 next->flags |= CF_RUNNING;
1249
1250 LOCK;
1251
1252 /* first get rid of the old state */
1253 save_perl (aTHX_ prev);
1254
1255 if (expect_false (next->flags & CF_NEW))
1256 {
1257 /* need to start coroutine */
1258 next->flags &= ~CF_NEW;
1259 /* setup coroutine call */
1260 coro_setup (aTHX_ next);
1261 }
1262 else
1263 load_perl (aTHX_ next);
1264
1265 prev__cctx = prev->cctx;
1266
1267 /* possibly "free" the cctx */
1268 if (expect_true (
1269 prev__cctx->idle_sp == STACKLEVEL
1270 && !(prev__cctx->flags & CC_TRACE)
1271 && !force_cctx
1272 ))
1273 {
1274 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1275 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1276
1277 prev->cctx = 0;
1278
1279 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1280 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1281 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1282 if (!next->cctx)
1283 next->cctx = cctx_get (aTHX);
1284
1285 cctx_put (prev__cctx);
1286 }
1287
1288 ++next->usecount;
1289
1290 if (expect_true (!next->cctx))
1291 next->cctx = cctx_get (aTHX);
1292
1293 has_throw = !!next->throw;
1294
1295 if (expect_false (prev__cctx != next->cctx))
1296 {
1297 prev__cctx->top_env = PL_top_env;
1298 PL_top_env = next->cctx->top_env;
1299 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1300 }
1301
1302 free_coro_mortal (aTHX);
1303 UNLOCK;
1304
1305 if (expect_false (has_throw))
1306 {
1307 struct coro *coro = SvSTATE (coro_current);
1308
1309 if (coro->throw)
1310 {
1311 SV *exception = coro->throw;
1312 coro->throw = 0;
1313 sv_setsv (ERRSV, exception);
1314 croak (0);
1315 }
1316 }
1317 }
1318}
1319
1320struct transfer_args
1321{
1322 struct coro *prev, *next;
1323};
1324
1325#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1326#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1327
1328/** high level stuff ********************************************************/
1329
1330static int
1331coro_state_destroy (pTHX_ struct coro *coro)
1332{
1333 if (coro->flags & CF_DESTROYED)
1334 return 0;
1335
1336 coro->flags |= CF_DESTROYED;
1337
1338 if (coro->flags & CF_READY)
1339 {
1340 /* reduce nready, as destroying a ready coro effectively unreadies it */
1341 /* alternative: look through all ready queues and remove the coro */
1342 LOCK;
1343 --coro_nready;
1344 UNLOCK;
1345 }
1346 else
1347 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1348
1349 if (coro->mainstack && coro->mainstack != main_mainstack)
1350 {
1351 struct coro temp;
1352
1353 if (coro->flags & CF_RUNNING)
1354 croak ("FATAL: tried to destroy currently running coroutine");
1355
1356 save_perl (aTHX_ &temp);
1357 load_perl (aTHX_ coro);
1358
1359 coro_destruct (aTHX_ coro);
1360
1361 load_perl (aTHX_ &temp);
1362
1363 coro->slot = 0;
1364 }
1365
1366 cctx_destroy (coro->cctx);
1367 SvREFCNT_dec (coro->args);
1368
1369 if (coro->next) coro->next->prev = coro->prev;
1370 if (coro->prev) coro->prev->next = coro->next;
1371 if (coro == coro_first) coro_first = coro->next;
1372
1373 return 1;
1374}
1375
1376static int
1377coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1378{
1379 struct coro *coro = (struct coro *)mg->mg_ptr;
1380 mg->mg_ptr = 0;
1381
1382 coro->hv = 0;
1383
1384 if (--coro->refcnt < 0)
1385 {
1386 coro_state_destroy (aTHX_ coro);
1387 Safefree (coro);
1388 }
1389
1390 return 0;
1391}
1392
1393static int
1394coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1395{
1396 struct coro *coro = (struct coro *)mg->mg_ptr;
1397
1398 ++coro->refcnt;
1399
1400 return 0;
1401}
1402
1403static MGVTBL coro_state_vtbl = {
1404 0, 0, 0, 0,
1405 coro_state_free,
1406 0,
1407#ifdef MGf_DUP
1408 coro_state_dup,
1409#else
1410# define MGf_DUP 0
1411#endif
1412};
1413
1414static void
1415prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1416{
1417 ta->prev = SvSTATE (prev_sv);
1418 ta->next = SvSTATE (next_sv);
1419 TRANSFER_CHECK (*ta);
1420}
1421
1422static void
1423api_transfer (SV *prev_sv, SV *next_sv)
1424{
1425 dTHX;
1426 struct transfer_args ta;
1427
1428 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1429 TRANSFER (ta, 1);
1430}
1431
1432/** Coro ********************************************************************/
1433
1434static void
1435coro_enq (pTHX_ SV *coro_sv)
1436{
1437 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1438}
1439
1440static SV *
1441coro_deq (pTHX)
1442{
1443 int prio;
1444
1445 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1446 if (AvFILLp (coro_ready [prio]) >= 0)
1447 return av_shift (coro_ready [prio]);
1448
1449 return 0;
1450}
1451
1452static int
1453api_ready (SV *coro_sv)
1454{
1455 dTHX;
1456 struct coro *coro;
1457 SV *sv_hook;
1458 void (*xs_hook)(void);
1459
1460 if (SvROK (coro_sv))
1461 coro_sv = SvRV (coro_sv);
1462
1463 coro = SvSTATE (coro_sv);
1464
1465 if (coro->flags & CF_READY)
1466 return 0;
1467
1468 coro->flags |= CF_READY;
1469
1470 LOCK;
1471
1472 sv_hook = coro_nready ? 0 : coro_readyhook;
1473 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1474
1475 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1476 ++coro_nready;
1477
1478 UNLOCK;
1479
1480 if (sv_hook)
1481 {
1482 dSP;
1483
1484 ENTER;
1485 SAVETMPS;
1486
1487 PUSHMARK (SP);
1488 PUTBACK;
1489 call_sv (sv_hook, G_DISCARD);
1490 SPAGAIN;
1491
1492 FREETMPS;
1493 LEAVE;
1494 }
1495
1496 if (xs_hook)
1497 xs_hook ();
1498
1499 return 1;
1500}
1501
1502static int
1503api_is_ready (SV *coro_sv)
1504{
1505 dTHX;
1506 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1507}
1508
1509static void
1510prepare_schedule (pTHX_ struct transfer_args *ta)
1511{
1512 SV *prev_sv, *next_sv;
1513
1514 for (;;)
1515 {
1516 LOCK;
1517 next_sv = coro_deq (aTHX);
1518
1519 /* nothing to schedule: call the idle handler */
1520 if (expect_false (!next_sv))
1521 {
1522 dSP;
1523 UNLOCK;
1524
1525 ENTER;
1526 SAVETMPS;
1527
1528 PUSHMARK (SP);
1529 PUTBACK;
1530 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1531 SPAGAIN;
1532
1533 FREETMPS;
1534 LEAVE;
1535 continue;
1536 }
1537
1538 ta->next = SvSTATE (next_sv);
1539
1540 /* cannot transfer to destroyed coros, skip and look for next */
1541 if (expect_false (ta->next->flags & CF_DESTROYED))
1542 {
1543 UNLOCK;
1544 SvREFCNT_dec (next_sv);
1545 /* coro_nready is already taken care of by destroy */
1546 continue;
1547 }
1548
1549 --coro_nready;
1550 UNLOCK;
1551 break;
1552 }
1553
1554 /* free this only after the transfer */
1555 prev_sv = SvRV (coro_current);
1556 ta->prev = SvSTATE (prev_sv);
1557 TRANSFER_CHECK (*ta);
1558 assert (ta->next->flags & CF_READY);
1559 ta->next->flags &= ~CF_READY;
1560 SvRV_set (coro_current, next_sv);
1561
1562 LOCK;
1563 free_coro_mortal (aTHX);
1564 coro_mortal = prev_sv;
1565 UNLOCK;
1566}
1567
1568static void
1569prepare_cede (pTHX_ struct transfer_args *ta)
1570{
1571 api_ready (coro_current);
1572 prepare_schedule (aTHX_ ta);
1573}
1574
1575static int
1576prepare_cede_notself (pTHX_ struct transfer_args *ta)
1577{
1578 if (coro_nready)
1579 {
1580 SV *prev = SvRV (coro_current);
1581 prepare_schedule (aTHX_ ta);
1582 api_ready (prev);
1583 return 1;
1584 }
1585 else
1586 return 0;
1587}
1588
1589static void
1590api_schedule (void)
1591{
1592 dTHX;
1593 struct transfer_args ta;
1594
1595 prepare_schedule (aTHX_ &ta);
1596 TRANSFER (ta, 1);
1597}
1598
1599static int
1600api_cede (void)
1601{
1602 dTHX;
1603 struct transfer_args ta;
1604
1605 prepare_cede (aTHX_ &ta);
1606
1607 if (expect_true (ta.prev != ta.next))
1608 {
1609 TRANSFER (ta, 1);
1610 return 1;
1611 }
1612 else
1613 return 0;
1614}
1615
1616static int
1617api_cede_notself (void)
1618{
1619 dTHX;
1620 struct transfer_args ta;
1621
1622 if (prepare_cede_notself (aTHX_ &ta))
1623 {
1624 TRANSFER (ta, 1);
1625 return 1;
1626 }
1627 else
1628 return 0;
1629}
1630
1631static void
1632api_trace (SV *coro_sv, int flags)
1633{
1634 dTHX;
1635 struct coro *coro = SvSTATE (coro_sv);
1636
1637 if (flags & CC_TRACE)
1638 {
1639 if (!coro->cctx)
1640 coro->cctx = cctx_new ();
1641 else if (!(coro->cctx->flags & CC_TRACE))
1642 croak ("cannot enable tracing on coroutine with custom stack");
1643
1644 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1645 }
1646 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1647 {
1648 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1649
1650 if (coro->flags & CF_RUNNING)
1651 PL_runops = RUNOPS_DEFAULT;
1652 else
1653 coro->slot->runops = RUNOPS_DEFAULT;
1654 }
1655}
1656
1657static int
1658coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1659{
1660 AV *padlist;
1661 AV *av = (AV *)mg->mg_obj;
1662
1663 abort ();
1664
1665 return 0;
1666}
1667
1668static MGVTBL coro_gensub_vtbl = {
1669 0, 0, 0, 0,
1670 coro_gensub_free
1671};
1672
1673/*****************************************************************************/
1674/* PerlIO::cede */
1675
1676typedef struct
1677{
1678 PerlIOBuf base;
1679 NV next, every;
1680} PerlIOCede;
1681
1682static IV
1683PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1684{
1685 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1686
1687 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1688 self->next = nvtime () + self->every;
1689
1690 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1691}
1692
1693static SV *
1694PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1695{
1696 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1697
1698 return newSVnv (self->every);
1699}
1700
1701static IV
1702PerlIOCede_flush (pTHX_ PerlIO *f)
1703{
1704 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1705 double now = nvtime ();
1706
1707 if (now >= self->next)
1708 {
1709 api_cede ();
1710 self->next = now + self->every;
1711 }
1712
1713 return PerlIOBuf_flush (aTHX_ f);
1714}
1715
1716static PerlIO_funcs PerlIO_cede =
1717{
1718 sizeof(PerlIO_funcs),
1719 "cede",
1720 sizeof(PerlIOCede),
1721 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1722 PerlIOCede_pushed,
1723 PerlIOBuf_popped,
1724 PerlIOBuf_open,
1725 PerlIOBase_binmode,
1726 PerlIOCede_getarg,
1727 PerlIOBase_fileno,
1728 PerlIOBuf_dup,
1729 PerlIOBuf_read,
1730 PerlIOBuf_unread,
1731 PerlIOBuf_write,
1732 PerlIOBuf_seek,
1733 PerlIOBuf_tell,
1734 PerlIOBuf_close,
1735 PerlIOCede_flush,
1736 PerlIOBuf_fill,
1737 PerlIOBase_eof,
1738 PerlIOBase_error,
1739 PerlIOBase_clearerr,
1740 PerlIOBase_setlinebuf,
1741 PerlIOBuf_get_base,
1742 PerlIOBuf_bufsiz,
1743 PerlIOBuf_get_ptr,
1744 PerlIOBuf_get_cnt,
1745 PerlIOBuf_set_ptrcnt,
1746};
1747
1748
746MODULE = Coro::State PACKAGE = Coro::State 1749MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
747 1750
748PROTOTYPES: ENABLE 1751PROTOTYPES: DISABLE
749 1752
750BOOT: 1753BOOT:
751{ /* {} necessary for stoopid perl-5.6.x */ 1754{
752 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1755#ifdef USE_ITHREADS
753 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1756 MUTEX_INIT (&coro_lock);
1757#endif
1758 BOOT_PAGESIZE;
1759
1760 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1761 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1762
1763 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1764 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1765 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1766
1767 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1768 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1769 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1770
754 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1771 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
755 1772
756 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1773 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
757 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1774 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
758 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1775 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
759 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1776 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
760
761 if (!padlist_cache)
762 padlist_cache = newHV ();
763 1777
764 main_mainstack = PL_mainstack; 1778 main_mainstack = PL_mainstack;
765} 1779 main_top_env = PL_top_env;
766 1780
767Coro::State 1781 while (main_top_env->je_prev)
768_newprocess(args) 1782 main_top_env = main_top_env->je_prev;
769 SV * args 1783
770 PROTOTYPE: $ 1784 coroapi.ver = CORO_API_VERSION;
1785 coroapi.rev = CORO_API_REVISION;
1786 coroapi.transfer = api_transfer;
1787
1788 {
1789 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1790
1791 if (!svp) croak ("Time::HiRes is required");
1792 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1793
1794 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1795 }
1796
1797 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1798}
1799
1800SV *
1801new (char *klass, ...)
771 CODE: 1802 CODE:
772 Coro__State coro; 1803{
1804 struct coro *coro;
1805 MAGIC *mg;
1806 HV *hv;
1807 int i;
773 1808
774 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
775 croak ("Coro::State::_newprocess expects an arrayref");
776
777 New (0, coro, 1, struct coro); 1809 Newz (0, coro, 1, struct coro);
1810 coro->args = newAV ();
1811 coro->flags = CF_NEW;
778 1812
779 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1813 if (coro_first) coro_first->prev = coro;
780 coro->mainstack = 0; /* actual work is done inside transfer */ 1814 coro->next = coro_first;
781 coro->stack = 0; 1815 coro_first = coro;
782 1816
783 RETVAL = coro; 1817 coro->hv = hv = newHV ();
1818 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1819 mg->mg_flags |= MGf_DUP;
1820 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1821
1822 av_extend (coro->args, items - 1);
1823 for (i = 1; i < items; i++)
1824 av_push (coro->args, newSVsv (ST (i)));
1825}
784 OUTPUT: 1826 OUTPUT:
785 RETVAL 1827 RETVAL
786 1828
1829# these not obviously related functions are all rolled into the same xs
1830# function to increase chances that they all will call transfer with the same
1831# stack offset
787void 1832void
788transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 1833_set_stacklevel (...)
789 Coro::State_or_hashref prev 1834 ALIAS:
790 Coro::State_or_hashref next 1835 Coro::State::transfer = 1
791 int flags 1836 Coro::schedule = 2
792 PROTOTYPE: @ 1837 Coro::cede = 3
1838 Coro::cede_notself = 4
793 CODE: 1839 CODE:
794 transfer (aTHX_ prev, next, flags); 1840{
1841 struct transfer_args ta;
1842
1843 PUTBACK;
1844 switch (ix)
1845 {
1846 case 0:
1847 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1848 ta.next = 0;
1849 break;
1850
1851 case 1:
1852 if (items != 2)
1853 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1854
1855 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1856 break;
1857
1858 case 2:
1859 prepare_schedule (aTHX_ &ta);
1860 break;
1861
1862 case 3:
1863 prepare_cede (aTHX_ &ta);
1864 break;
1865
1866 case 4:
1867 if (!prepare_cede_notself (aTHX_ &ta))
1868 XSRETURN_EMPTY;
1869
1870 break;
1871 }
1872 SPAGAIN;
1873
1874 BARRIER;
1875 PUTBACK;
1876 TRANSFER (ta, 0);
1877 SPAGAIN; /* might be the sp of a different coroutine now */
1878 /* be extra careful not to ever do anything after TRANSFER */
1879}
1880
1881bool
1882_destroy (SV *coro_sv)
1883 CODE:
1884 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1885 OUTPUT:
1886 RETVAL
795 1887
796void 1888void
797DESTROY(coro) 1889_exit (int code)
798 Coro::State coro 1890 PROTOTYPE: $
799 CODE: 1891 CODE:
1892 _exit (code);
800 1893
801 if (coro->mainstack && coro->mainstack != main_mainstack) 1894int
1895cctx_stacksize (int new_stacksize = 0)
1896 CODE:
1897 RETVAL = cctx_stacksize;
1898 if (new_stacksize)
1899 {
1900 cctx_stacksize = new_stacksize;
1901 ++cctx_gen;
1902 }
1903 OUTPUT:
1904 RETVAL
1905
1906int
1907cctx_max_idle (int max_idle = 0)
1908 CODE:
1909 RETVAL = cctx_max_idle;
1910 if (max_idle > 1)
1911 cctx_max_idle = max_idle;
1912 OUTPUT:
1913 RETVAL
1914
1915int
1916cctx_count ()
1917 CODE:
1918 RETVAL = cctx_count;
1919 OUTPUT:
1920 RETVAL
1921
1922int
1923cctx_idle ()
1924 CODE:
1925 RETVAL = cctx_idle;
1926 OUTPUT:
1927 RETVAL
1928
1929void
1930list ()
1931 PPCODE:
1932{
1933 struct coro *coro;
1934 for (coro = coro_first; coro; coro = coro->next)
1935 if (coro->hv)
1936 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1937}
1938
1939void
1940call (Coro::State coro, SV *coderef)
1941 ALIAS:
1942 eval = 1
1943 CODE:
1944{
1945 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
802 { 1946 {
803 struct coro temp; 1947 struct coro temp;
804 1948
805 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1949 if (!(coro->flags & CF_RUNNING))
806 LOAD(aTHX_ coro); 1950 {
1951 PUTBACK;
1952 save_perl (aTHX_ &temp);
1953 load_perl (aTHX_ coro);
1954 }
807 1955
808 destroy_stacks (aTHX); 1956 {
1957 dSP;
1958 ENTER;
1959 SAVETMPS;
1960 PUTBACK;
1961 PUSHSTACK;
1962 PUSHMARK (SP);
809 1963
810 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1964 if (ix)
1965 eval_sv (coderef, 0);
1966 else
1967 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
811 1968
812 coro->mainstack = 0; 1969 POPSTACK;
1970 SPAGAIN;
1971 FREETMPS;
1972 LEAVE;
1973 PUTBACK;
1974 }
1975
1976 if (!(coro->flags & CF_RUNNING))
1977 {
1978 save_perl (aTHX_ coro);
1979 load_perl (aTHX_ &temp);
1980 SPAGAIN;
1981 }
813 } 1982 }
1983}
814 1984
815 deallocate_stack (coro); 1985SV *
816 1986is_ready (Coro::State coro)
817 Safefree (coro); 1987 PROTOTYPE: $
1988 ALIAS:
1989 is_ready = CF_READY
1990 is_running = CF_RUNNING
1991 is_new = CF_NEW
1992 is_destroyed = CF_DESTROYED
1993 CODE:
1994 RETVAL = boolSV (coro->flags & ix);
1995 OUTPUT:
1996 RETVAL
818 1997
819void 1998void
820flush() 1999api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2000
2001SV *
2002has_cctx (Coro::State coro)
2003 PROTOTYPE: $
821 CODE: 2004 CODE:
822#ifdef MAY_FLUSH 2005 RETVAL = boolSV (!!coro->cctx);
823 flush_padlist_cache (); 2006 OUTPUT:
824#endif 2007 RETVAL
825 2008
826MODULE = Coro::State PACKAGE = Coro::Cont 2009int
2010is_traced (Coro::State coro)
2011 PROTOTYPE: $
2012 CODE:
2013 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2014 OUTPUT:
2015 RETVAL
827 2016
828# this is slightly dirty 2017IV
2018rss (Coro::State coro)
2019 PROTOTYPE: $
2020 ALIAS:
2021 usecount = 1
2022 CODE:
2023 switch (ix)
2024 {
2025 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2026 case 1: RETVAL = coro->usecount; break;
2027 }
2028 OUTPUT:
2029 RETVAL
829 2030
830void 2031void
831yield(...) 2032force_cctx ()
2033 CODE:
2034 struct coro *coro = SvSTATE (coro_current);
2035 coro->cctx->idle_sp = 0;
2036
2037void
2038swap_defsv (Coro::State self)
2039 PROTOTYPE: $
2040 ALIAS:
2041 swap_defav = 1
2042 CODE:
2043 if (!self->slot)
2044 croak ("cannot swap state with coroutine that has no saved state");
2045 else
2046 {
2047 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2048 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2049
2050 SV *tmp = *src; *src = *dst; *dst = tmp;
2051 }
2052
2053MODULE = Coro::State PACKAGE = Coro
2054
2055BOOT:
2056{
2057 int i;
2058
2059 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2060 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2061 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2062
2063 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2064 SvREADONLY_on (coro_current);
2065
2066 coro_stash = gv_stashpv ("Coro", TRUE);
2067
2068 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2069 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2070 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2071 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2072 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2073 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2074
2075 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2076 coro_ready[i] = newAV ();
2077
2078 {
2079 SV *sv = perl_get_sv ("Coro::API", TRUE);
2080 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2081
2082 coroapi.schedule = api_schedule;
2083 coroapi.cede = api_cede;
2084 coroapi.cede_notself = api_cede_notself;
2085 coroapi.ready = api_ready;
2086 coroapi.is_ready = api_is_ready;
2087 coroapi.nready = &coro_nready;
2088 coroapi.current = coro_current;
2089
2090 GCoroAPI = &coroapi;
2091 sv_setiv (sv, (IV)&coroapi);
2092 SvREADONLY_on (sv);
2093 }
2094}
2095
2096void
2097_set_current (SV *current)
2098 PROTOTYPE: $
2099 CODE:
2100 SvREFCNT_dec (SvRV (coro_current));
2101 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2102
2103void
2104_set_readyhook (SV *hook)
2105 PROTOTYPE: $
2106 CODE:
2107 LOCK;
2108 SvREFCNT_dec (coro_readyhook);
2109 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2110 UNLOCK;
2111
2112int
2113prio (Coro::State coro, int newprio = 0)
2114 ALIAS:
2115 nice = 1
2116 CODE:
2117{
2118 RETVAL = coro->prio;
2119
2120 if (items > 1)
2121 {
2122 if (ix)
2123 newprio = coro->prio - newprio;
2124
2125 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2126 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2127
2128 coro->prio = newprio;
2129 }
2130}
2131 OUTPUT:
2132 RETVAL
2133
2134SV *
2135ready (SV *self)
2136 PROTOTYPE: $
2137 CODE:
2138 RETVAL = boolSV (api_ready (self));
2139 OUTPUT:
2140 RETVAL
2141
2142int
2143nready (...)
2144 PROTOTYPE:
2145 CODE:
2146 RETVAL = coro_nready;
2147 OUTPUT:
2148 RETVAL
2149
2150void
2151throw (Coro::State self, SV *throw = &PL_sv_undef)
2152 PROTOTYPE: $;$
2153 CODE:
2154 SvREFCNT_dec (self->throw);
2155 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2156
2157# for async_pool speedup
2158void
2159_pool_1 (SV *cb)
2160 CODE:
2161{
2162 struct coro *coro = SvSTATE (coro_current);
2163 HV *hv = (HV *)SvRV (coro_current);
2164 AV *defav = GvAV (PL_defgv);
2165 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2166 AV *invoke_av;
2167 int i, len;
2168
2169 if (!invoke)
2170 {
2171 SV *old = PL_diehook;
2172 PL_diehook = 0;
2173 SvREFCNT_dec (old);
2174 croak ("\3async_pool terminate\2\n");
2175 }
2176
2177 SvREFCNT_dec (coro->saved_deffh);
2178 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2179
2180 hv_store (hv, "desc", sizeof ("desc") - 1,
2181 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2182
2183 invoke_av = (AV *)SvRV (invoke);
2184 len = av_len (invoke_av);
2185
2186 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2187
2188 if (len > 0)
2189 {
2190 av_fill (defav, len - 1);
2191 for (i = 0; i < len; ++i)
2192 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2193 }
2194
2195 SvREFCNT_dec (invoke);
2196}
2197
2198void
2199_pool_2 (SV *cb)
2200 CODE:
2201{
2202 struct coro *coro = SvSTATE (coro_current);
2203
2204 sv_setsv (cb, &PL_sv_undef);
2205
2206 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2207 coro->saved_deffh = 0;
2208
2209 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2210 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2211 {
2212 SV *old = PL_diehook;
2213 PL_diehook = 0;
2214 SvREFCNT_dec (old);
2215 croak ("\3async_pool terminate\2\n");
2216 }
2217
2218 av_clear (GvAV (PL_defgv));
2219 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2220 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2221
2222 coro->prio = 0;
2223
2224 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2225 api_trace (coro_current, 0);
2226
2227 av_push (av_async_pool, newSVsv (coro_current));
2228}
2229
2230#if 0
2231
2232void
2233_generator_call (...)
832 PROTOTYPE: @ 2234 PROTOTYPE: @
2235 PPCODE:
2236 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2237 xxxx
2238 abort ();
2239
2240SV *
2241gensub (SV *sub, ...)
2242 PROTOTYPE: &;@
833 CODE: 2243 CODE:
834 static SV *returnstk; 2244{
2245 struct coro *coro;
2246 MAGIC *mg;
835 SV *sv; 2247 CV *xcv;
2248 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2249 int i;
2250
2251 CvGV (ncv) = CvGV (cv);
2252 CvFILE (ncv) = CvFILE (cv);
2253
2254 Newz (0, coro, 1, struct coro);
2255 coro->args = newAV ();
2256 coro->flags = CF_NEW;
2257
2258 av_extend (coro->args, items - 1);
2259 for (i = 1; i < items; i++)
2260 av_push (coro->args, newSVsv (ST (i)));
2261
2262 CvISXSUB_on (ncv);
2263 CvXSUBANY (ncv).any_ptr = (void *)coro;
2264
2265 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2266
2267 CvXSUB (ncv) = CvXSUB (xcv);
2268 CvANON_on (ncv);
2269
2270 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2271 RETVAL = newRV_noinc ((SV *)ncv);
2272}
2273 OUTPUT:
2274 RETVAL
2275
2276#endif
2277
2278
2279MODULE = Coro::State PACKAGE = Coro::AIO
2280
2281void
2282_get_state (SV *self)
2283 PPCODE:
2284{
836 AV *defav = GvAV (PL_defgv); 2285 AV *defav = GvAV (PL_defgv);
837 struct coro *prev, *next; 2286 AV *av = newAV ();
2287 int i;
2288 SV *data_sv = newSV (sizeof (struct io_state));
2289 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2290 SvCUR_set (data_sv, sizeof (struct io_state));
2291 SvPOK_only (data_sv);
838 2292
839 if (!returnstk) 2293 data->errorno = errno;
840 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2294 data->laststype = PL_laststype;
2295 data->laststatval = PL_laststatval;
2296 data->statcache = PL_statcache;
841 2297
842 /* set up @_ -- ugly */ 2298 av_extend (av, AvFILLp (defav) + 1 + 1);
843 av_clear (defav);
844 av_fill (defav, items - 1);
845 while (items--)
846 av_store (defav, items, SvREFCNT_inc (ST(items)));
847 2299
848 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 2300 for (i = 0; i <= AvFILLp (defav); ++i)
849 sv = av_pop ((AV *)SvRV (returnstk)); 2301 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
850 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
851 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
852 SvREFCNT_dec (sv);
853 2302
854 transfer(aTHX_ prev, next, 0); 2303 av_push (av, data_sv);
855 2304
2305 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2306
2307 api_ready (self);
2308}
2309
2310void
2311_set_state (SV *state)
2312 PROTOTYPE: $
2313 PPCODE:
2314{
2315 AV *av = (AV *)SvRV (state);
2316 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2317 int i;
2318
2319 errno = data->errorno;
2320 PL_laststype = data->laststype;
2321 PL_laststatval = data->laststatval;
2322 PL_statcache = data->statcache;
2323
2324 EXTEND (SP, AvFILLp (av));
2325 for (i = 0; i < AvFILLp (av); ++i)
2326 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2327}
2328
2329
2330MODULE = Coro::State PACKAGE = Coro::AnyEvent
2331
2332BOOT:
2333 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2334
2335SV *
2336_schedule (...)
2337 PROTOTYPE: @
2338 CODE:
2339{
2340 static int incede;
2341
2342 api_cede_notself ();
2343
2344 ++incede;
2345 while (coro_nready >= incede && api_cede ())
2346 ;
2347
2348 sv_setsv (sv_activity, &PL_sv_undef);
2349 if (coro_nready >= incede)
2350 {
2351 PUSHMARK (SP);
2352 PUTBACK;
2353 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2354 SPAGAIN;
2355 }
2356
2357 --incede;
2358}
2359
2360
2361MODULE = Coro::State PACKAGE = PerlIO::cede
2362
2363BOOT:
2364 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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