ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.54 by pcg, Sat Mar 13 06:45:04 2004 UTC vs.
Revision 1.282 by root, Sun Nov 16 10:33:08 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 "patchlevel.h" 11#include "patchlevel.h"
6 12
7#if PATCHLEVEL < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
8# ifndef PL_ppaddr 63# ifndef PL_ppaddr
9# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
10# endif 65# endif
11# ifndef call_sv 66# ifndef call_sv
12# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
23# ifndef IS_PADCONST 78# ifndef IS_PADCONST
24# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
25# endif 80# endif
26#endif 81#endif
27 82
28#include "libcoro/coro.c" 83/* 5.11 */
29 84#ifndef CxHASARGS
30#include <signal.h> 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
31
32#ifdef HAVE_MMAP
33# include <unistd.h>
34# include <sys/mman.h>
35# ifndef MAP_ANONYMOUS
36# ifdef MAP_ANON
37# define MAP_ANONYMOUS MAP_ANON
38# else
39# undef HAVE_MMAP
40# endif 86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
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
147# if CORO_PTHREAD
148static void *coro_thx;
41# endif 149# endif
42#endif 150#endif
43 151
44#define SUB_INIT "Coro::State::initialize" 152/* helper storage struct for Coro::AIO */
45#define UCORO_STATE "_coro_state" 153struct io_state
154{
155 AV *res;
156 int errorno;
157 I32 laststype; /* U16 in 5.10.0 */
158 int laststatval;
159 Stat_t statcache;
160};
46 161
47/* The next macro should declare a variable stacklevel that contains and approximation 162static double (*nvtime)(); /* so why doesn't it take void? */
48 * to the current C stack pointer. Its property is that it changes with each call
49 * and should be unique. */
50#define dSTACKLEVEL void *stacklevel = &stacklevel
51 163
52#define IN_DESTRUCT (PL_main_cv == Nullcv) 164static U32 cctx_gen;
53 165static size_t cctx_stacksize = CORO_STACKSIZE;
54#define labs(l) ((l) >= 0 ? (l) : -(l))
55
56#include "CoroAPI.h"
57
58static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171static volatile struct coro *transfer_next;
59 172
60/* this is actually not only the c stack but also c registers etc... */ 173static GV *irsgv; /* $/ */
174static GV *stdoutgv; /* *STDOUT */
175static SV *rv_diehook;
176static SV *rv_warnhook;
177static HV *hv_sig; /* %SIG */
178
179/* async_pool helper stuff */
180static SV *sv_pool_rss;
181static SV *sv_pool_size;
182static AV *av_async_pool;
183
184/* Coro::AnyEvent */
185static SV *sv_activity;
186
187static struct coro_cctx *cctx_first;
188static int cctx_count, cctx_idle;
189
190enum {
191 CC_MAPPED = 0x01,
192 CC_NOREUSE = 0x02, /* throw this away after tracing */
193 CC_TRACE = 0x04,
194 CC_TRACE_SUB = 0x08, /* trace sub calls */
195 CC_TRACE_LINE = 0x10, /* trace each statement */
196 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
197};
198
199/* this is a structure representing a c-level coroutine */
61typedef struct { 200typedef struct coro_cctx
62 int refcnt; /* pointer reference counter */ 201{
63 int usecnt; /* shared by how many coroutines */ 202 struct coro_cctx *next;
64 int gencnt; /* generation counter */
65 203
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;
66 coro_context cctx; 212 coro_context cctx;
67 213
68 void *sptr; 214 U32 gen;
69 long ssize; /* positive == mmap, otherwise malloc */ 215#if CORO_USE_VALGRIND
70} coro_stack; 216 int valgrind_id;
217#endif
218 unsigned char flags;
219} coro_cctx;
71 220
221enum {
222 CF_RUNNING = 0x0001, /* coroutine is running */
223 CF_READY = 0x0002, /* coroutine is ready */
224 CF_NEW = 0x0004, /* has never been switched to */
225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
226};
227
228/* the structure where most of the perl state is stored, overlaid on the cxstack */
229typedef struct
230{
231 SV *defsv;
232 AV *defav;
233 SV *errsv;
234 SV *irsgv;
235#define VAR(name,type) type name;
236# include "state.h"
237#undef VAR
238} perl_slots;
239
240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
241
242/* this is a structure representing a perl-level coroutine */
72struct coro { 243struct coro {
73 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 244 /* the C coroutine allocated to this perl coroutine, if any */
74 JMPENV start_env; 245 coro_cctx *cctx;
75 246
76 /* the optional C context */ 247 /* process data */
77 coro_stack *stack; 248 struct CoroSLF slf_frame; /* saved slf frame */
78 void *cursp;
79 int gencnt;
80
81 /* optionally saved, might be zero */
82 AV *defav;
83 SV *defsv;
84 SV *errsv;
85
86 /* saved global state not related to stacks */
87 U8 dowarn;
88 I32 in_eval;
89
90 /* the stacks and related info (callchain etc..) */
91 PERL_SI *curstackinfo;
92 AV *curstack;
93 AV *mainstack; 249 AV *mainstack;
94 SV **stack_sp; 250 perl_slots *slot; /* basically the saved sp */
95 OP *op;
96 SV **curpad;
97 AV *comppad;
98 SV **stack_base;
99 SV **stack_max;
100 SV **tmps_stack;
101 I32 tmps_floor;
102 I32 tmps_ix;
103 I32 tmps_max;
104 I32 *markstack;
105 I32 *markstack_ptr;
106 I32 *markstack_max;
107 I32 *scopestack;
108 I32 scopestack_ix;
109 I32 scopestack_max;
110 ANY *savestack;
111 I32 savestack_ix;
112 I32 savestack_max;
113 OP **retstack;
114 I32 retstack_ix;
115 I32 retstack_max;
116 COP *curcop;
117 JMPENV *top_env;
118 251
119 /* data associated with this coroutine (initial args) */ 252 AV *args; /* data associated with this coroutine (initial args) */
120 AV *args; 253 int refcnt; /* coroutines are refcounted, yes */
254 int flags; /* CF_ flags */
255 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
257
258 /* statistics */
259 int usecount; /* number of transfers to this coro */
260
261 /* coro process data */
262 int prio;
263 SV *throw; /* exception to be thrown */
264
265 /* async_pool */
266 SV *saved_deffh;
267
268 /* linked list */
269 struct coro *next, *prev;
121}; 270};
122 271
123typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
124typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
125 274
126static AV *main_mainstack; /* used to differentiate between $main and others */ 275static struct CoroSLF slf_frame; /* the current slf frame */
127static HV *coro_state_stash;
128static SV *ucoro_state_sv;
129static U32 ucoro_state_hash;
130static HV *padlist_cache;
131static SV *coro_mortal; /* will be freed after next transfer */
132 276
133/* mostly copied from op.c:cv_clone2 */ 277/** Coro ********************************************************************/
134STATIC AV * 278
135clone_padlist (AV *protopadlist) 279#define PRIO_MAX 3
280#define PRIO_HIGH 1
281#define PRIO_NORMAL 0
282#define PRIO_LOW -1
283#define PRIO_IDLE -3
284#define PRIO_MIN -4
285
286/* for Coro.pm */
287static SV *coro_current;
288static SV *coro_readyhook;
289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
290static struct coro *coro_first;
291#define coro_nready coroapi.nready
292
293/** lowlevel stuff **********************************************************/
294
295static SV *
296coro_get_sv (pTHX_ const char *name, int create)
136{ 297{
137 AV *av; 298#if PERL_VERSION_ATLEAST (5,10,0)
138 I32 ix; 299 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
139 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 300 get_sv (name, create);
140 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 301#endif
141 SV **pname = AvARRAY (protopad_name); 302 return get_sv (name, create);
142 SV **ppad = AvARRAY (protopad); 303}
143 I32 fname = AvFILLp (protopad_name); 304
144 I32 fpad = AvFILLp (protopad); 305static AV *
306coro_get_av (pTHX_ const char *name, int create)
307{
308#if PERL_VERSION_ATLEAST (5,10,0)
309 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
310 get_av (name, create);
311#endif
312 return get_av (name, create);
313}
314
315static HV *
316coro_get_hv (pTHX_ const char *name, int create)
317{
318#if PERL_VERSION_ATLEAST (5,10,0)
319 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
320 get_hv (name, create);
321#endif
322 return get_hv (name, create);
323}
324
325static AV *
326coro_clone_padlist (pTHX_ CV *cv)
327{
328 AV *padlist = CvPADLIST (cv);
145 AV *newpadlist, *newpad_name, *newpad; 329 AV *newpadlist, *newpad;
146 SV **npad;
147
148 newpad_name = newAV ();
149 for (ix = fname; ix >= 0; ix--)
150 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152 newpad = newAV ();
153 av_fill (newpad, AvFILLp (protopad));
154 npad = AvARRAY (newpad);
155 330
156 newpadlist = newAV (); 331 newpadlist = newAV ();
157 AvREAL_off (newpadlist); 332 AvREAL_off (newpadlist);
158 av_store (newpadlist, 0, (SV *) newpad_name); 333#if PERL_VERSION_ATLEAST (5,10,0)
334 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
335#else
336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
337#endif
338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
339 --AvFILLp (padlist);
340
341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
159 av_store (newpadlist, 1, (SV *) newpad); 342 av_store (newpadlist, 1, (SV *)newpad);
160
161 av = newAV (); /* will be @_ */
162 av_extend (av, 0);
163 av_store (newpad, 0, (SV *) av);
164 AvFLAGS (av) = AVf_REIFY;
165
166 for (ix = fpad; ix > 0; ix--)
167 {
168 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169 if (namesv && namesv != &PL_sv_undef)
170 {
171 char *name = SvPVX (namesv); /* XXX */
172 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173 { /* lexical from outside? */
174 npad[ix] = SvREFCNT_inc (ppad[ix]);
175 }
176 else
177 { /* our own lexical */
178 SV *sv;
179 if (*name == '&')
180 sv = SvREFCNT_inc (ppad[ix]);
181 else if (*name == '@')
182 sv = (SV *) newAV ();
183 else if (*name == '%')
184 sv = (SV *) newHV ();
185 else
186 sv = NEWSV (0, 0);
187#ifdef SvPADBUSY
188 if (!SvPADBUSY (sv))
189#endif
190 SvPADMY_on (sv);
191 npad[ix] = sv;
192 }
193 }
194 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195 {
196 npad[ix] = SvREFCNT_inc (ppad[ix]);
197 }
198 else
199 {
200 SV *sv = NEWSV (0, 0);
201 SvPADTMP_on (sv);
202 npad[ix] = sv;
203 }
204 }
205
206#if 0 /* return -ENOTUNDERSTOOD */
207 /* Now that vars are all in place, clone nested closures. */
208
209 for (ix = fpad; ix > 0; ix--) {
210 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211 if (namesv
212 && namesv != &PL_sv_undef
213 && !(SvFLAGS(namesv) & SVf_FAKE)
214 && *SvPVX(namesv) == '&'
215 && CvCLONE(ppad[ix]))
216 {
217 CV *kid = cv_clone((CV*)ppad[ix]);
218 SvREFCNT_dec(ppad[ix]);
219 CvCLONE_on(kid);
220 SvPADMY_on(kid);
221 npad[ix] = (SV*)kid;
222 }
223 }
224#endif
225 343
226 return newpadlist; 344 return newpadlist;
227} 345}
228 346
229STATIC void 347static void
230free_padlist (AV *padlist) 348free_padlist (pTHX_ AV *padlist)
231{ 349{
232 /* may be during global destruction */ 350 /* may be during global destruction */
233 if (SvREFCNT (padlist)) 351 if (SvREFCNT (padlist))
234 { 352 {
235 I32 i = AvFILLp (padlist); 353 I32 i = AvFILLp (padlist);
… …
248 366
249 SvREFCNT_dec ((SV*)padlist); 367 SvREFCNT_dec ((SV*)padlist);
250 } 368 }
251} 369}
252 370
253STATIC int 371static int
254coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 372coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255{ 373{
256 AV *padlist; 374 AV *padlist;
257 AV *av = (AV *)mg->mg_obj; 375 AV *av = (AV *)mg->mg_obj;
258 376
259 /* casting is fun. */ 377 /* casting is fun. */
260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 378 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261 free_padlist (padlist); 379 free_padlist (aTHX_ padlist);
262}
263 380
381 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
382
383 return 0;
384}
385
264#define PERL_MAGIC_coro PERL_MAGIC_ext 386#define CORO_MAGIC_type_cv PERL_MAGIC_ext
387#define CORO_MAGIC_type_state PERL_MAGIC_ext
265 388
266static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 389static MGVTBL coro_cv_vtbl = {
390 0, 0, 0, 0,
391 coro_cv_free
392};
393
394#define CORO_MAGIC(sv, type) \
395 expect_true (SvMAGIC (sv)) \
396 ? expect_true (SvMAGIC (sv)->mg_type == type) \
397 ? SvMAGIC (sv) \
398 : mg_find (sv, type) \
399 : 0
400
401#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
402#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
403
404INLINE struct coro *
405SvSTATE_ (pTHX_ SV *coro)
406{
407 HV *stash;
408 MAGIC *mg;
409
410 if (SvROK (coro))
411 coro = SvRV (coro);
412
413 if (expect_false (SvTYPE (coro) != SVt_PVHV))
414 croak ("Coro::State object required");
415
416 stash = SvSTASH (coro);
417 if (expect_false (stash != coro_stash && stash != coro_state_stash))
418 {
419 /* very slow, but rare, check */
420 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
421 croak ("Coro::State object required");
422 }
423
424 mg = CORO_MAGIC_state (coro);
425 return (struct coro *)mg->mg_ptr;
426}
427
428#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
429
430/* fastert than SvSTATE, but expects a coroutine hv */
431INLINE struct coro *
432SvSTATE_hv (SV *sv)
433{
434 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
435 ? SvMAGIC (sv)
436 : mg_find (sv, CORO_MAGIC_type_state);
437
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
267 442
268/* the next two functions merely cache the padlists */ 443/* the next two functions merely cache the padlists */
269STATIC void 444static void
270get_padlist (CV *cv) 445get_padlist (pTHX_ CV *cv)
271{ 446{
272 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 447 MAGIC *mg = CORO_MAGIC_cv (cv);
448 AV *av;
273 449
274 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 450 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
275 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 451 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276 else 452 else
277 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
278}
279
280STATIC void
281put_padlist (CV *cv)
282{
283 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
284
285 if (!mg)
286 { 453 {
287 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 454#if CORO_PREFER_PERL_FUNCTIONS
288 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 455 /* this is probably cleaner? but also slower! */
289 mg->mg_virtual = &vtbl_coro; 456 /* in practise, it seems to be less stable */
290 mg->mg_obj = (SV *)newAV (); 457 CV *cp = Perl_cv_clone (cv);
458 CvPADLIST (cv) = CvPADLIST (cp);
459 CvPADLIST (cp) = 0;
460 SvREFCNT_dec (cp);
461#else
462 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
463#endif
291 } 464 }
292
293 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
294} 465}
295 466
296#define SB do {
297#define SE } while (0)
298
299#define LOAD(state) load_state(aTHX_ (state));
300#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
301
302#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
303
304static void 467static void
468put_padlist (pTHX_ CV *cv)
469{
470 MAGIC *mg = CORO_MAGIC_cv (cv);
471 AV *av;
472
473 if (expect_false (!mg))
474 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
475
476 av = (AV *)mg->mg_obj;
477
478 if (expect_false (AvFILLp (av) >= AvMAX (av)))
479 av_extend (av, AvMAX (av) + 1);
480
481 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
482}
483
484/** load & save, init *******************************************************/
485
486static void
305load_state(pTHX_ Coro__State c) 487load_perl (pTHX_ Coro__State c)
306{ 488{
307 PL_dowarn = c->dowarn; 489 perl_slots *slot = c->slot;
308 PL_in_eval = c->in_eval; 490 c->slot = 0;
309 491
310 PL_curstackinfo = c->curstackinfo;
311 PL_curstack = c->curstack;
312 PL_mainstack = c->mainstack; 492 PL_mainstack = c->mainstack;
313 PL_stack_sp = c->stack_sp;
314 PL_op = c->op;
315 PL_curpad = c->curpad;
316 PL_comppad = c->comppad;
317 PL_stack_base = c->stack_base;
318 PL_stack_max = c->stack_max;
319 PL_tmps_stack = c->tmps_stack;
320 PL_tmps_floor = c->tmps_floor;
321 PL_tmps_ix = c->tmps_ix;
322 PL_tmps_max = c->tmps_max;
323 PL_markstack = c->markstack;
324 PL_markstack_ptr = c->markstack_ptr;
325 PL_markstack_max = c->markstack_max;
326 PL_scopestack = c->scopestack;
327 PL_scopestack_ix = c->scopestack_ix;
328 PL_scopestack_max = c->scopestack_max;
329 PL_savestack = c->savestack;
330 PL_savestack_ix = c->savestack_ix;
331 PL_savestack_max = c->savestack_max;
332 PL_retstack = c->retstack;
333 PL_retstack_ix = c->retstack_ix;
334 PL_retstack_max = c->retstack_max;
335 PL_curcop = c->curcop;
336 PL_top_env = c->top_env;
337 493
338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 494 GvSV (PL_defgv) = slot->defsv;
339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 495 GvAV (PL_defgv) = slot->defav;
340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 496 GvSV (PL_errgv) = slot->errsv;
497 GvSV (irsgv) = slot->irsgv;
498
499 #define VAR(name,type) PL_ ## name = slot->name;
500 # include "state.h"
501 #undef VAR
341 502
342 { 503 {
343 dSP; 504 dSP;
505
344 CV *cv; 506 CV *cv;
345 507
346 /* now do the ugly restore mess */ 508 /* now do the ugly restore mess */
347 while ((cv = (CV *)POPs)) 509 while (expect_true (cv = (CV *)POPs))
348 { 510 {
349 AV *padlist = (AV *)POPs;
350
351 if (padlist)
352 {
353 put_padlist (cv); /* mark this padlist as available */ 511 put_padlist (aTHX_ cv); /* mark this padlist as available */
354 CvPADLIST(cv) = padlist; 512 CvDEPTH (cv) = PTR2IV (POPs);
355#ifdef USE_THREADS 513 CvPADLIST (cv) = (AV *)POPs;
356 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357#endif
358 }
359
360 ++CvDEPTH(cv);
361 } 514 }
362 515
363 PUTBACK; 516 PUTBACK;
364 } 517 }
365}
366 518
519 slf_frame = c->slf_frame;
520}
521
367static void 522static void
368save_state(pTHX_ Coro__State c, int flags) 523save_perl (pTHX_ Coro__State c)
369{ 524{
525 c->slf_frame = slf_frame;
526
370 { 527 {
371 dSP; 528 dSP;
372 I32 cxix = cxstack_ix; 529 I32 cxix = cxstack_ix;
373 PERL_CONTEXT *ccstk = cxstack; 530 PERL_CONTEXT *ccstk = cxstack;
374 PERL_SI *top_si = PL_curstackinfo; 531 PERL_SI *top_si = PL_curstackinfo;
… …
376 /* 533 /*
377 * the worst thing you can imagine happens first - we have to save 534 * the worst thing you can imagine happens first - we have to save
378 * (and reinitialize) all cv's in the whole callchain :( 535 * (and reinitialize) all cv's in the whole callchain :(
379 */ 536 */
380 537
381 PUSHs (Nullsv); 538 XPUSHs (Nullsv);
382 /* this loop was inspired by pp_caller */ 539 /* this loop was inspired by pp_caller */
383 for (;;) 540 for (;;)
384 { 541 {
385 while (cxix >= 0) 542 while (expect_true (cxix >= 0))
386 { 543 {
387 PERL_CONTEXT *cx = &ccstk[cxix--]; 544 PERL_CONTEXT *cx = &ccstk[cxix--];
388 545
389 if (CxTYPE(cx) == CXt_SUB) 546 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
390 { 547 {
391 CV *cv = cx->blk_sub.cv; 548 CV *cv = cx->blk_sub.cv;
549
392 if (CvDEPTH(cv)) 550 if (expect_true (CvDEPTH (cv)))
393 { 551 {
394#ifdef USE_THREADS
395 /*XPUSHs ((SV *)CvOWNER(cv));*/
396 /*CvOWNER(cv) = 0;*/
397 /*error must unlock this cv etc.. etc...*/
398#endif
399 EXTEND (SP, CvDEPTH(cv)*2); 552 EXTEND (SP, 3);
400
401 while (--CvDEPTH(cv))
402 {
403 /* this tells the restore code to increment CvDEPTH */
404 PUSHs (Nullsv);
405 PUSHs ((SV *)cv);
406 }
407
408 PUSHs ((SV *)CvPADLIST(cv)); 553 PUSHs ((SV *)CvPADLIST (cv));
554 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
409 PUSHs ((SV *)cv); 555 PUSHs ((SV *)cv);
410 556
411 get_padlist (cv); /* this is a monster */ 557 CvDEPTH (cv) = 0;
558 get_padlist (aTHX_ cv);
412 } 559 }
413 } 560 }
414#ifdef CXt_FORMAT
415 else if (CxTYPE(cx) == CXt_FORMAT)
416 {
417 /* I never used formats, so how should I know how these are implemented? */
418 /* my bold guess is as a simple, plain sub... */
419 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
420 }
421#endif
422 } 561 }
423 562
424 if (top_si->si_type == PERLSI_MAIN) 563 if (expect_true (top_si->si_type == PERLSI_MAIN))
425 break; 564 break;
426 565
427 top_si = top_si->si_prev; 566 top_si = top_si->si_prev;
428 ccstk = top_si->si_cxstack; 567 ccstk = top_si->si_cxstack;
429 cxix = top_si->si_cxix; 568 cxix = top_si->si_cxix;
430 } 569 }
431 570
432 PUTBACK; 571 PUTBACK;
433 } 572 }
434 573
435 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 574 /* allocate some space on the context stack for our purposes */
436 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 575 /* we manually unroll here, as usually 2 slots is enough */
437 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 576 if (SLOT_COUNT >= 1) CXINC;
577 if (SLOT_COUNT >= 2) CXINC;
578 if (SLOT_COUNT >= 3) CXINC;
579 {
580 int i;
581 for (i = 3; i < SLOT_COUNT; ++i)
582 CXINC;
583 }
584 cxstack_ix -= SLOT_COUNT; /* undo allocation */
438 585
439 c->dowarn = PL_dowarn;
440 c->in_eval = PL_in_eval;
441
442 c->curstackinfo = PL_curstackinfo;
443 c->curstack = PL_curstack;
444 c->mainstack = PL_mainstack; 586 c->mainstack = PL_mainstack;
445 c->stack_sp = PL_stack_sp; 587
446 c->op = PL_op; 588 {
447 c->curpad = PL_curpad; 589 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
448 c->comppad = PL_comppad; 590
449 c->stack_base = PL_stack_base; 591 slot->defav = GvAV (PL_defgv);
450 c->stack_max = PL_stack_max; 592 slot->defsv = DEFSV;
451 c->tmps_stack = PL_tmps_stack; 593 slot->errsv = ERRSV;
452 c->tmps_floor = PL_tmps_floor; 594 slot->irsgv = GvSV (irsgv);
453 c->tmps_ix = PL_tmps_ix; 595
454 c->tmps_max = PL_tmps_max; 596 #define VAR(name,type) slot->name = PL_ ## name;
455 c->markstack = PL_markstack; 597 # include "state.h"
456 c->markstack_ptr = PL_markstack_ptr; 598 #undef VAR
457 c->markstack_max = PL_markstack_max; 599 }
458 c->scopestack = PL_scopestack;
459 c->scopestack_ix = PL_scopestack_ix;
460 c->scopestack_max = PL_scopestack_max;
461 c->savestack = PL_savestack;
462 c->savestack_ix = PL_savestack_ix;
463 c->savestack_max = PL_savestack_max;
464 c->retstack = PL_retstack;
465 c->retstack_ix = PL_retstack_ix;
466 c->retstack_max = PL_retstack_max;
467 c->curcop = PL_curcop;
468 c->top_env = PL_top_env;
469} 600}
470 601
471/* 602/*
472 * allocate various perl stacks. This is an exact copy 603 * allocate various perl stacks. This is almost an exact copy
473 * of perl.c:init_stacks, except that it uses less memory 604 * of perl.c:init_stacks, except that it uses less memory
474 * on the (sometimes correct) assumption that coroutines do 605 * on the (sometimes correct) assumption that coroutines do
475 * not usually need a lot of stackspace. 606 * not usually need a lot of stackspace.
476 */ 607 */
477STATIC void 608#if CORO_PREFER_PERL_FUNCTIONS
609# define coro_init_stacks init_stacks
610#else
611static void
478coro_init_stacks (pTHX) 612coro_init_stacks (pTHX)
479{ 613{
480 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 614 PL_curstackinfo = new_stackinfo(32, 8);
481 PL_curstackinfo->si_type = PERLSI_MAIN; 615 PL_curstackinfo->si_type = PERLSI_MAIN;
482 PL_curstack = PL_curstackinfo->si_stack; 616 PL_curstack = PL_curstackinfo->si_stack;
483 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 617 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
484 618
485 PL_stack_base = AvARRAY(PL_curstack); 619 PL_stack_base = AvARRAY(PL_curstack);
486 PL_stack_sp = PL_stack_base; 620 PL_stack_sp = PL_stack_base;
487 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 621 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
488 622
489 New(50,PL_tmps_stack,96,SV*); 623 New(50,PL_tmps_stack,32,SV*);
490 PL_tmps_floor = -1; 624 PL_tmps_floor = -1;
491 PL_tmps_ix = -1; 625 PL_tmps_ix = -1;
492 PL_tmps_max = 96; 626 PL_tmps_max = 32;
493 627
494 New(54,PL_markstack,16,I32); 628 New(54,PL_markstack,16,I32);
495 PL_markstack_ptr = PL_markstack; 629 PL_markstack_ptr = PL_markstack;
496 PL_markstack_max = PL_markstack + 16; 630 PL_markstack_max = PL_markstack + 16;
497 631
498#ifdef SET_MARK_OFFSET 632#ifdef SET_MARK_OFFSET
499 SET_MARK_OFFSET; 633 SET_MARK_OFFSET;
500#endif 634#endif
501 635
502 New(54,PL_scopestack,16,I32); 636 New(54,PL_scopestack,8,I32);
503 PL_scopestack_ix = 0; 637 PL_scopestack_ix = 0;
504 PL_scopestack_max = 16; 638 PL_scopestack_max = 8;
505 639
506 New(54,PL_savestack,96,ANY); 640 New(54,PL_savestack,24,ANY);
507 PL_savestack_ix = 0; 641 PL_savestack_ix = 0;
508 PL_savestack_max = 96; 642 PL_savestack_max = 24;
509 643
644#if !PERL_VERSION_ATLEAST (5,10,0)
510 New(54,PL_retstack,8,OP*); 645 New(54,PL_retstack,4,OP*);
511 PL_retstack_ix = 0; 646 PL_retstack_ix = 0;
512 PL_retstack_max = 8; 647 PL_retstack_max = 4;
648#endif
513} 649}
650#endif
514 651
515/* 652/*
516 * destroy the stacks, the callchain etc... 653 * destroy the stacks, the callchain etc...
517 */ 654 */
518STATIC void 655static void
519destroy_stacks(pTHX) 656coro_destruct_stacks (pTHX)
520{ 657{
521 if (!IN_DESTRUCT)
522 {
523 /* is this ugly, I ask? */
524 LEAVE_SCOPE (0);
525
526 /* sure it is, but more important: is it correct?? :/ */
527 FREETMPS;
528 }
529
530 while (PL_curstackinfo->si_next) 658 while (PL_curstackinfo->si_next)
531 PL_curstackinfo = PL_curstackinfo->si_next; 659 PL_curstackinfo = PL_curstackinfo->si_next;
532 660
533 while (PL_curstackinfo) 661 while (PL_curstackinfo)
534 { 662 {
535 PERL_SI *p = PL_curstackinfo->si_prev; 663 PERL_SI *p = PL_curstackinfo->si_prev;
536 664
537 {
538 dSP;
539 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
540 PUTBACK; /* possibly superfluous */
541 }
542
543 if (!IN_DESTRUCT) 665 if (!IN_DESTRUCT)
544 {
545 dounwind(-1);
546 SvREFCNT_dec(PL_curstackinfo->si_stack); 666 SvREFCNT_dec (PL_curstackinfo->si_stack);
547 }
548 667
549 Safefree(PL_curstackinfo->si_cxstack); 668 Safefree (PL_curstackinfo->si_cxstack);
550 Safefree(PL_curstackinfo); 669 Safefree (PL_curstackinfo);
551 PL_curstackinfo = p; 670 PL_curstackinfo = p;
552 } 671 }
553 672
554 Safefree(PL_tmps_stack); 673 Safefree (PL_tmps_stack);
555 Safefree(PL_markstack); 674 Safefree (PL_markstack);
556 Safefree(PL_scopestack); 675 Safefree (PL_scopestack);
557 Safefree(PL_savestack); 676 Safefree (PL_savestack);
677#if !PERL_VERSION_ATLEAST (5,10,0)
558 Safefree(PL_retstack); 678 Safefree (PL_retstack);
559}
560
561static void
562allocate_stack (Coro__State ctx, int alloc)
563{
564 coro_stack *stack;
565
566 New (0, stack, 1, coro_stack);
567
568 stack->refcnt = 1;
569 stack->usecnt = 1;
570 stack->gencnt = ctx->gencnt = 0;
571 if (alloc)
572 {
573#if HAVE_MMAP
574 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
575 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
576 if (stack->sptr == (void *)-1)
577#endif 679#endif
680}
681
682static size_t
683coro_rss (pTHX_ struct coro *coro)
684{
685 size_t rss = sizeof (*coro);
686
687 if (coro->mainstack)
688 {
689 perl_slots tmp_slot;
690 perl_slots *slot;
691
692 if (coro->flags & CF_RUNNING)
578 { 693 {
579 /*FIXME*//*D*//* reasonable stack size! */ 694 slot = &tmp_slot;
580 stack->ssize = - (8192 * sizeof (long)); 695
581 New (0, stack->sptr, 8192, long); 696 #define VAR(name,type) slot->name = PL_ ## name;
697 # include "state.h"
698 #undef VAR
582 } 699 }
583 }
584 else 700 else
585 stack->sptr = 0; 701 slot = coro->slot;
586 702
587 ctx->stack = stack; 703 if (slot)
588}
589
590static void
591deallocate_stack (Coro__State ctx)
592{
593 coro_stack *stack = ctx->stack;
594
595 ctx->stack = 0;
596
597 if (stack)
598 {
599 if (!--stack->refcnt)
600 { 704 {
601#ifdef HAVE_MMAP 705 rss += sizeof (slot->curstackinfo);
602 if (stack->ssize > 0 && stack->sptr) 706 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
603 munmap (stack->sptr, stack->ssize); 707 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
604 else 708 rss += slot->tmps_max * sizeof (SV *);
605#endif 709 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
606 Safefree (stack->sptr); 710 rss += slot->scopestack_max * sizeof (I32);
711 rss += slot->savestack_max * sizeof (ANY);
607 712
608 Safefree (stack); 713#if !PERL_VERSION_ATLEAST (5,10,0)
714 rss += slot->retstack_max * sizeof (OP *);
715#endif
609 } 716 }
610 else if (ctx->gencnt == stack->gencnt) 717 }
611 --stack->usecnt; 718
719 return rss;
720}
721
722/** coroutine stack handling ************************************************/
723
724static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
726static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
727
728/* apparently < 5.8.8 */
729#ifndef MgPV_nolen_const
730#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
731 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
732 (const char*)(mg)->mg_ptr)
733#endif
734
735/*
736 * This overrides the default magic get method of %SIG elements.
737 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
738 * and instead of tryign to save and restore the hash elements, we just provide
739 * readback here.
740 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
741 * not expecting this to actually change the hook. This is a potential problem
742 * when a schedule happens then, but we ignore this.
743 */
744static int
745coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
746{
747 const char *s = MgPV_nolen_const (mg);
748
749 if (*s == '_')
612 } 750 {
613} 751 SV **svp = 0;
614 752
753 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
754 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
755
756 if (svp)
757 {
758 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
759 return 0;
760 }
761 }
762
763 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
764}
765
615static void 766static int
616setup_coro (void *arg) 767coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
768{
769 const char *s = MgPV_nolen_const (mg);
770
771 if (*s == '_')
772 {
773 SV **svp = 0;
774
775 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
776 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
777
778 if (svp)
779 {
780 SV *old = *svp;
781 *svp = 0;
782 SvREFCNT_dec (old);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = newSVsv (sv);
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
812}
813
814static void
815prepare_nop (pTHX_ struct coro_transfer_args *ta)
816{
817 /* kind of mega-hacky, but works */
818 ta->next = ta->prev = (struct coro *)ta;
819}
820
821static int
822slf_check_nop (pTHX_ struct CoroSLF *frame)
823{
824 return 0;
825}
826
827static void
828coro_setup (pTHX_ struct coro *coro)
617{ 829{
618 /* 830 /*
619 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
620 */ 832 */
621 dSP;
622 Coro__State ctx = (Coro__State)arg;
623 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
624
625 coro_init_stacks (aTHX); 833 coro_init_stacks (aTHX);
626 /*PL_curcop = 0;*/ 834
627 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 835 PL_runops = RUNOPS_DEFAULT;
836 PL_curcop = &PL_compiling;
837 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0;
839 PL_curpm = 0;
840 PL_curpad = 0;
841 PL_localizing = 0;
842 PL_dirty = 0;
843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
858
859 {
860 dSP;
861 UNOP myop;
862
863 Zero (&myop, 1, UNOP);
864 myop.op_next = Nullop;
865 myop.op_flags = OPf_WANT_VOID;
866
867 PUSHMARK (SP);
868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
869 PUTBACK;
870 PL_op = (OP *)&myop;
871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
872 SPAGAIN;
873 }
874
875 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
880}
881
882static void
883coro_destruct (pTHX_ struct coro *coro)
884{
885 if (!IN_DESTRUCT)
886 {
887 /* restore all saved variables and stuff */
888 LEAVE_SCOPE (0);
889 assert (PL_tmps_floor == -1);
890
891 /* free all temporaries */
892 FREETMPS;
893 assert (PL_tmps_ix == -1);
894
895 /* unwind all extra stacks */
896 POPSTACK_TO (PL_mainstack);
897
898 /* unwind main stack */
899 dounwind (-1);
900 }
901
902 SvREFCNT_dec (GvSV (PL_defgv));
628 SvREFCNT_dec (GvAV (PL_defgv)); 903 SvREFCNT_dec (GvAV (PL_defgv));
629 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 904 SvREFCNT_dec (GvSV (PL_errgv));
905 SvREFCNT_dec (PL_defoutgv);
906 SvREFCNT_dec (PL_rs);
907 SvREFCNT_dec (GvSV (irsgv));
630 908
631 SPAGAIN; 909 SvREFCNT_dec (PL_diehook);
910 SvREFCNT_dec (PL_warnhook);
911
912 SvREFCNT_dec (coro->saved_deffh);
913 SvREFCNT_dec (coro->throw);
632 914
633 if (ctx->stack) 915 coro_destruct_stacks (aTHX);
634 { 916}
635 ctx->cursp = 0;
636 917
637 PUSHMARK(SP); 918INLINE void
638 PUTBACK; 919free_coro_mortal (pTHX)
639 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 920{
640 921 if (expect_true (coro_mortal))
641 if (SvTRUE (ERRSV))
642 croak (NULL);
643 else
644 croak ("FATAL: CCTXT coroutine returned!");
645 } 922 {
646 else 923 SvREFCNT_dec (coro_mortal);
924 coro_mortal = 0;
647 { 925 }
648 UNOP myop; 926}
649 927
650 PL_op = (OP *)&myop; 928static int
929runops_trace (pTHX)
930{
931 COP *oldcop = 0;
932 int oldcxix = -2;
933 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
934 coro_cctx *cctx = coro->cctx;
651 935
652 Zero(&myop, 1, UNOP); 936 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
653 myop.op_next = Nullop;
654 myop.op_flags = OPf_WANT_VOID;
655
656 PUSHMARK(SP);
657 XPUSHs (sub_init);
658 /*
659 * the next line is slightly wrong, as PL_op->op_next
660 * is actually being executed so we skip the first op.
661 * that doesn't matter, though, since it is only
662 * pp_nextstate and we never return...
663 * ah yes, and I don't care anyways ;)
664 */
665 PUTBACK;
666 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
667 SPAGAIN;
668
669 ENTER; /* necessary e.g. for dounwind */
670 } 937 {
671} 938 PERL_ASYNC_CHECK ();
672 939
673static void 940 if (cctx->flags & CC_TRACE_ALL)
674continue_coro (void *arg)
675{
676 /*
677 * this is a _very_ stripped down perl interpreter ;)
678 */
679 Coro__State ctx = (Coro__State)arg;
680 JMPENV coro_start_env;
681
682 PL_top_env = &ctx->start_env;
683
684 ctx->cursp = 0;
685 PL_op = PL_op->op_next;
686 CALLRUNOPS(aTHX);
687
688 abort ();
689}
690
691STATIC void
692transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
693{
694 dSTACKLEVEL;
695 static struct coro *xnext;
696
697 if (prev != next)
698 {
699 xnext = next;
700
701 if (next->mainstack)
702 { 941 {
703 SAVE (prev, flags); 942 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
704 LOAD (next);
705
706 /* mark this state as in-use */
707 next->mainstack = 0;
708 next->tmps_ix = -2;
709
710 /* stacklevel changed? if yes, grab the stack for us! */
711 if (flags & TRANSFER_SAVE_CCTXT)
712 { 943 {
713 if (!prev->stack) 944 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
714 allocate_stack (prev, 0); 945 SV **bot, **top;
715 else if (prev->cursp != stacklevel 946 AV *av = newAV (); /* return values */
716 && prev->stack->usecnt > 1) 947 SV **cb;
948 dSP;
949
950 GV *gv = CvGV (cx->blk_sub.cv);
951 SV *fullname = sv_2mortal (newSV (0));
952 if (isGV (gv))
953 gv_efullname3 (fullname, gv, 0);
954
955 bot = PL_stack_base + cx->blk_oldsp + 1;
956 top = cx->blk_gimme == G_ARRAY ? SP + 1
957 : cx->blk_gimme == G_SCALAR ? bot + 1
958 : bot;
959
960 av_extend (av, top - bot);
961 while (bot < top)
962 av_push (av, SvREFCNT_inc_NN (*bot++));
963
964 PL_runops = RUNOPS_DEFAULT;
965 ENTER;
966 SAVETMPS;
967 EXTEND (SP, 3);
968 PUSHMARK (SP);
969 PUSHs (&PL_sv_no);
970 PUSHs (fullname);
971 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
972 PUTBACK;
973 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
974 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
975 SPAGAIN;
976 FREETMPS;
977 LEAVE;
978 PL_runops = runops_trace;
979 }
980
981 if (oldcop != PL_curcop)
982 {
983 oldcop = PL_curcop;
984
985 if (PL_curcop != &PL_compiling)
717 { 986 {
718 prev->gencnt = ++prev->stack->gencnt; 987 SV **cb;
719 prev->stack->usecnt = 1;
720 }
721 988
722 /* has our stack been invalidated? */ 989 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
723 if (next->stack && next->stack->gencnt != next->gencnt)
724 { 990 {
725 deallocate_stack (next); 991 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
726 allocate_stack (next, 1); 992
727 coro_create (&(next->stack->cctx), 993 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
728 continue_coro, (void *)next, 994 {
729 next->stack->sptr, labs (next->stack->ssize)); 995 runops_proc_t old_runops = PL_runops;
996 dSP;
997 GV *gv = CvGV (cx->blk_sub.cv);
998 SV *fullname = sv_2mortal (newSV (0));
999
1000 if (isGV (gv))
1001 gv_efullname3 (fullname, gv, 0);
1002
1003 PL_runops = RUNOPS_DEFAULT;
1004 ENTER;
1005 SAVETMPS;
1006 EXTEND (SP, 3);
1007 PUSHMARK (SP);
1008 PUSHs (&PL_sv_yes);
1009 PUSHs (fullname);
1010 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1011 PUTBACK;
1012 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1013 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1014 SPAGAIN;
1015 FREETMPS;
1016 LEAVE;
1017 PL_runops = runops_trace;
1018 }
1019
1020 oldcxix = cxstack_ix;
730 } 1021 }
731 1022
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1023 if (cctx->flags & CC_TRACE_LINE)
733 /* don't add any code here */
734 }
735
736 }
737 else if (next->tmps_ix == -2)
738 croak ("tried to transfer to running coroutine");
739 else
740 {
741 SAVE (prev, -1); /* first get rid of the old state */
742
743 if (flags & TRANSFER_SAVE_CCTXT)
744 {
745 if (!prev->stack)
746 allocate_stack (prev, 0);
747
748 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
749 { 1024 {
750 PL_top_env = &next->start_env; 1025 dSP;
751 1026
752 setup_coro (next); 1027 PL_runops = RUNOPS_DEFAULT;
753 1028 ENTER;
754 prev->stack->refcnt++; 1029 SAVETMPS;
755 prev->stack->usecnt++; 1030 EXTEND (SP, 3);
756 next->stack = prev->stack; 1031 PL_runops = RUNOPS_DEFAULT;
757 next->gencnt = prev->gencnt; 1032 PUSHMARK (SP);
1033 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1034 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1035 PUTBACK;
1036 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1037 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1038 SPAGAIN;
1039 FREETMPS;
1040 LEAVE;
1041 PL_runops = runops_trace;
758 } 1042 }
759 else
760 {
761 assert (!next->stack);
762 allocate_stack (next, 1);
763 coro_create (&(next->stack->cctx),
764 setup_coro, (void *)next,
765 next->stack->sptr, labs (next->stack->ssize));
766 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
767 /* don't add any code here */
768 } 1043 }
769 } 1044 }
770 else
771 setup_coro (next);
772 } 1045 }
1046 }
773 1047
1048 TAINT_NOT;
1049 return 0;
1050}
1051
1052static void
1053prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1054{
1055 ta->prev = (struct coro *)cctx;
1056 ta->next = 0;
1057}
1058
1059/* inject a fake call to Coro::State::_cctx_init into the execution */
1060/* _cctx_init should be careful, as it could be called at almost any time */
1061/* during execution of a perl program */
1062/* also initialises PL_top_env */
1063static void NOINLINE
1064cctx_prepare (pTHX_ coro_cctx *cctx)
1065{
1066 dSP;
1067 UNOP myop;
1068
1069 PL_top_env = &PL_start_env;
1070
1071 if (cctx->flags & CC_TRACE)
1072 PL_runops = runops_trace;
1073
1074 Zero (&myop, 1, UNOP);
1075 myop.op_next = PL_op;
1076 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1077
1078 PUSHMARK (SP);
1079 EXTEND (SP, 2);
1080 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1081 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1082 PUTBACK;
1083 PL_op = (OP *)&myop;
1084 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1085 SPAGAIN;
1086}
1087
1088/* the tail of transfer: execute stuff we can only do after a transfer */
1089INLINE void
1090transfer_tail (pTHX)
1091{
1092 struct coro *next = (struct coro *)transfer_next;
1093 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1094 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1095
1096 free_coro_mortal (aTHX);
1097
1098 if (expect_false (next->throw))
1099 {
1100 SV *exception = sv_2mortal (next->throw);
1101
1102 next->throw = 0;
1103 sv_setsv (ERRSV, exception);
1104 croak (0);
1105 }
1106}
1107
1108/*
1109 * this is a _very_ stripped down perl interpreter ;)
1110 */
1111static void
1112cctx_run (void *arg)
1113{
1114#ifdef USE_ITHREADS
1115# if CORO_PTHREAD
1116 PERL_SET_CONTEXT (coro_thx);
1117# endif
1118#endif
1119 {
1120 dTHX;
1121
1122 /* normally we would need to skip the entersub here */
1123 /* not doing so will re-execute it, which is exactly what we want */
1124 /* PL_nop = PL_nop->op_next */
1125
1126 /* inject a fake subroutine call to cctx_init */
1127 cctx_prepare (aTHX_ (coro_cctx *)arg);
1128
1129 /* cctx_run is the alternative tail of transfer() */
1130 /* TODO: throwing an exception here might be deadly, VERIFY */
1131 transfer_tail (aTHX);
1132
1133 /* somebody or something will hit me for both perl_run and PL_restartop */
1134 PL_restartop = PL_op;
1135 perl_run (PL_curinterp);
1136
774 /* 1137 /*
775 * xnext is now either prev or next, depending on wether 1138 * If perl-run returns we assume exit() was being called or the coro
776 * we switched the c stack or not. that's why I use a global 1139 * fell off the end, which seems to be the only valid (non-bug)
777 * variable, that should become thread-specific at one point. 1140 * reason for perl_run to return. We try to exit by jumping to the
1141 * bootstrap-time "top" top_env, as we cannot restore the "main"
1142 * coroutine as Coro has no such concept
778 */ 1143 */
779 xnext->cursp = stacklevel; 1144 PL_top_env = main_top_env;
1145 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1146 }
1147}
1148
1149static coro_cctx *
1150cctx_new ()
1151{
1152 coro_cctx *cctx;
1153
1154 ++cctx_count;
1155 New (0, cctx, 1, coro_cctx);
1156
1157 cctx->gen = cctx_gen;
1158 cctx->flags = 0;
1159 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1160
1161 return cctx;
1162}
1163
1164/* create a new cctx only suitable as source */
1165static coro_cctx *
1166cctx_new_empty ()
1167{
1168 coro_cctx *cctx = cctx_new ();
1169
1170 cctx->sptr = 0;
1171 coro_create (&cctx->cctx, 0, 0, 0, 0);
1172
1173 return cctx;
1174}
1175
1176/* create a new cctx suitable as destination/running a perl interpreter */
1177static coro_cctx *
1178cctx_new_run ()
1179{
1180 coro_cctx *cctx = cctx_new ();
1181 void *stack_start;
1182 size_t stack_size;
1183
1184#if HAVE_MMAP
1185 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1186 /* mmap supposedly does allocate-on-write for us */
1187 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1188
1189 if (cctx->sptr != (void *)-1)
780 } 1190 {
781 1191 #if CORO_STACKGUARD
782 if (coro_mortal) 1192 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1193 #endif
1194 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1195 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1196 cctx->flags |= CC_MAPPED;
783 { 1197 }
784 SvREFCNT_dec (coro_mortal); 1198 else
785 coro_mortal = 0; 1199#endif
786 } 1200 {
787} 1201 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1202 New (0, cctx->sptr, cctx_stacksize, long);
788 1203
789#define SV_CORO(sv,func) \ 1204 if (!cctx->sptr)
790 do { \ 1205 {
791 if (SvROK (sv)) \ 1206 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
792 sv = SvRV (sv); \ 1207 _exit (EXIT_FAILURE);
793 \ 1208 }
794 if (SvTYPE(sv) == SVt_PVHV) \
795 { \
796 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
797 \
798 if (!he) \
799 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
800 \
801 (sv) = SvRV (HeVAL(he)); \
802 } \
803 \
804 /* must also be changed inside Coro::Cont::yield */ \
805 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
806 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
807 \
808 } while(0)
809 1209
810#define SvSTATE(sv) (struct coro *)SvIV (sv) 1210 stack_start = cctx->sptr;
1211 stack_size = cctx->ssize;
1212 }
811 1213
1214 #if CORO_USE_VALGRIND
1215 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1216 #endif
1217
1218 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1219
1220 return cctx;
1221}
1222
1223static void
1224cctx_destroy (coro_cctx *cctx)
1225{
1226 if (!cctx)
1227 return;
1228
1229 --cctx_count;
1230 coro_destroy (&cctx->cctx);
1231
1232 /* coro_transfer creates new, empty cctx's */
1233 if (cctx->sptr)
1234 {
1235 #if CORO_USE_VALGRIND
1236 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1237 #endif
1238
1239#if HAVE_MMAP
1240 if (cctx->flags & CC_MAPPED)
1241 munmap (cctx->sptr, cctx->ssize);
1242 else
1243#endif
1244 Safefree (cctx->sptr);
1245 }
1246
1247 Safefree (cctx);
1248}
1249
1250/* wether this cctx should be destructed */
1251#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1252
1253static coro_cctx *
1254cctx_get (pTHX)
1255{
1256 while (expect_true (cctx_first))
1257 {
1258 coro_cctx *cctx = cctx_first;
1259 cctx_first = cctx->next;
1260 --cctx_idle;
1261
1262 if (expect_true (!CCTX_EXPIRED (cctx)))
1263 return cctx;
1264
1265 cctx_destroy (cctx);
1266 }
1267
1268 return cctx_new_run ();
1269}
1270
1271static void
1272cctx_put (coro_cctx *cctx)
1273{
1274 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1275
1276 /* free another cctx if overlimit */
1277 if (expect_false (cctx_idle >= cctx_max_idle))
1278 {
1279 coro_cctx *first = cctx_first;
1280 cctx_first = first->next;
1281 --cctx_idle;
1282
1283 cctx_destroy (first);
1284 }
1285
1286 ++cctx_idle;
1287 cctx->next = cctx_first;
1288 cctx_first = cctx;
1289}
1290
1291/** coroutine switching *****************************************************/
1292
1293static void
1294transfer_check (pTHX_ struct coro *prev, struct coro *next)
1295{
1296 if (expect_true (prev != next))
1297 {
1298 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1299 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1300
1301 if (expect_false (next->flags & CF_RUNNING))
1302 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1303
1304 if (expect_false (next->flags & CF_DESTROYED))
1305 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1306
1307#if !PERL_VERSION_ATLEAST (5,10,0)
1308 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1309 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1310#endif
1311 }
1312}
1313
1314/* always use the TRANSFER macro */
1315static void NOINLINE
1316transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1317{
1318 dSTACKLEVEL;
1319
1320 /* sometimes transfer is only called to set idle_sp */
1321 if (expect_false (!next))
1322 {
1323 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1324 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1325 }
1326 else if (expect_true (prev != next))
1327 {
1328 coro_cctx *prev__cctx;
1329
1330 if (expect_false (prev->flags & CF_NEW))
1331 {
1332 /* create a new empty/source context */
1333 prev->cctx = cctx_new_empty ();
1334 prev->flags &= ~CF_NEW;
1335 prev->flags |= CF_RUNNING;
1336 }
1337
1338 prev->flags &= ~CF_RUNNING;
1339 next->flags |= CF_RUNNING;
1340
1341 /* first get rid of the old state */
1342 save_perl (aTHX_ prev);
1343
1344 if (expect_false (next->flags & CF_NEW))
1345 {
1346 /* need to start coroutine */
1347 next->flags &= ~CF_NEW;
1348 /* setup coroutine call */
1349 coro_setup (aTHX_ next);
1350 }
1351 else
1352 load_perl (aTHX_ next);
1353
1354 prev__cctx = prev->cctx;
1355
1356 /* possibly untie and reuse the cctx */
1357 if (expect_true (
1358 prev__cctx->idle_sp == (void *)stacklevel
1359 && !(prev__cctx->flags & CC_TRACE)
1360 && !force_cctx
1361 ))
1362 {
1363 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1364 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1365
1366 prev->cctx = 0;
1367
1368 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1369 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1370 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1371 if (!next->cctx)
1372 next->cctx = cctx_get (aTHX);
1373
1374 cctx_put (prev__cctx);
1375 }
1376
1377 ++next->usecount;
1378
1379 if (expect_true (!next->cctx))
1380 next->cctx = cctx_get (aTHX);
1381
1382 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1383 transfer_next = next;
1384
1385 if (expect_false (prev__cctx != next->cctx))
1386 {
1387 prev__cctx->top_env = PL_top_env;
1388 PL_top_env = next->cctx->top_env;
1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1390 }
1391
1392 transfer_tail (aTHX);
1393 }
1394}
1395
1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1398
1399/** high level stuff ********************************************************/
1400
812static void 1401static int
1402coro_state_destroy (pTHX_ struct coro *coro)
1403{
1404 if (coro->flags & CF_DESTROYED)
1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1409
1410 coro->flags |= CF_DESTROYED;
1411
1412 if (coro->flags & CF_READY)
1413 {
1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1415 /* alternative: look through all ready queues and remove the coro */
1416 --coro_nready;
1417 }
1418 else
1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1420
1421 if (coro->mainstack && coro->mainstack != main_mainstack)
1422 {
1423 struct coro temp;
1424
1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1426
1427 save_perl (aTHX_ &temp);
1428 load_perl (aTHX_ coro);
1429
1430 coro_destruct (aTHX_ coro);
1431
1432 load_perl (aTHX_ &temp);
1433
1434 coro->slot = 0;
1435 }
1436
1437 cctx_destroy (coro->cctx);
1438 SvREFCNT_dec (coro->args);
1439
1440 if (coro->next) coro->next->prev = coro->prev;
1441 if (coro->prev) coro->prev->next = coro->next;
1442 if (coro == coro_first) coro_first = coro->next;
1443
1444 return 1;
1445}
1446
1447static int
1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1449{
1450 struct coro *coro = (struct coro *)mg->mg_ptr;
1451 mg->mg_ptr = 0;
1452
1453 coro->hv = 0;
1454
1455 if (--coro->refcnt < 0)
1456 {
1457 coro_state_destroy (aTHX_ coro);
1458 Safefree (coro);
1459 }
1460
1461 return 0;
1462}
1463
1464static int
1465coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1466{
1467 struct coro *coro = (struct coro *)mg->mg_ptr;
1468
1469 ++coro->refcnt;
1470
1471 return 0;
1472}
1473
1474static MGVTBL coro_state_vtbl = {
1475 0, 0, 0, 0,
1476 coro_state_free,
1477 0,
1478#ifdef MGf_DUP
1479 coro_state_dup,
1480#else
1481# define MGf_DUP 0
1482#endif
1483};
1484
1485static void
1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1487{
1488 ta->prev = SvSTATE (prev_sv);
1489 ta->next = SvSTATE (next_sv);
1490 TRANSFER_CHECK (*ta);
1491}
1492
1493static void
813api_transfer(pTHX_ SV *prev, SV *next, int flags) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
814{ 1495{
815 SV_CORO (prev, "Coro::transfer"); 1496 struct coro_transfer_args ta;
816 SV_CORO (next, "Coro::transfer");
817 1497
818 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1499 TRANSFER (ta, 1);
819} 1500}
820 1501
821/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
822 1503
823#define PRIO_MAX 3 1504INLINE void
824#define PRIO_HIGH 1 1505coro_enq (pTHX_ struct coro *coro)
825#define PRIO_NORMAL 0 1506{
826#define PRIO_LOW -1 1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
827#define PRIO_IDLE -3 1508}
828#define PRIO_MIN -4
829 1509
830/* for Coro.pm */ 1510INLINE SV *
831static GV *coro_current, *coro_idle; 1511coro_deq (pTHX)
832static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 1512{
833static int coro_nready; 1513 int prio;
834 1514
1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1516 if (AvFILLp (coro_ready [prio]) >= 0)
1517 return av_shift (coro_ready [prio]);
1518
1519 return 0;
1520}
1521
835static void 1522static int
836coro_enq (SV *sv) 1523api_ready (pTHX_ SV *coro_sv)
837{ 1524{
838 if (SvTYPE (sv) == SVt_PVHV) 1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
1528
1529 if (SvROK (coro_sv))
1530 coro_sv = SvRV (coro_sv);
1531
1532 coro = SvSTATE (coro_sv);
1533
1534 if (coro->flags & CF_READY)
1535 return 0;
1536
1537 coro->flags |= CF_READY;
1538
1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
1543 ++coro_nready;
1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_DISCARD);
1555 SPAGAIN;
1556
1557 FREETMPS;
1558 LEAVE;
839 { 1559 }
840 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
841 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
842 1560
843 prio = prio > PRIO_MAX ? PRIO_MAX 1561 if (xs_hook)
844 : prio < PRIO_MIN ? PRIO_MIN 1562 xs_hook ();
845 : prio;
846 1563
847 av_push (coro_ready [prio - PRIO_MIN], sv); 1564 return 1;
1565}
1566
1567static int
1568api_is_ready (pTHX_ SV *coro_sv)
1569{
1570 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1571}
1572
1573INLINE void
1574prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1575{
1576 SV *prev_sv, *next_sv;
1577
1578 for (;;)
1579 {
1580 next_sv = coro_deq (aTHX);
1581
1582 /* nothing to schedule: call the idle handler */
1583 if (expect_false (!next_sv))
1584 {
1585 dSP;
1586
1587 ENTER;
1588 SAVETMPS;
1589
1590 PUSHMARK (SP);
1591 PUTBACK;
1592 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1593 SPAGAIN;
1594
1595 FREETMPS;
1596 LEAVE;
1597 continue;
1598 }
1599
1600 ta->next = SvSTATE_hv (next_sv);
1601
1602 /* cannot transfer to destroyed coros, skip and look for next */
1603 if (expect_false (ta->next->flags & CF_DESTROYED))
1604 {
1605 SvREFCNT_dec (next_sv);
1606 /* coro_nready has already been taken care of by destroy */
1607 continue;
1608 }
1609
848 coro_nready++; 1610 --coro_nready;
1611 break;
1612 }
849 1613
1614 /* free this only after the transfer */
1615 prev_sv = SvRV (coro_current);
1616 ta->prev = SvSTATE_hv (prev_sv);
1617 TRANSFER_CHECK (*ta);
1618 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1619 ta->next->flags &= ~CF_READY;
1620 SvRV_set (coro_current, next_sv);
1621
1622 free_coro_mortal (aTHX);
1623 coro_mortal = prev_sv;
1624}
1625
1626INLINE void
1627prepare_cede (pTHX_ struct coro_transfer_args *ta)
1628{
1629 api_ready (aTHX_ coro_current);
1630 prepare_schedule (aTHX_ ta);
1631}
1632
1633INLINE void
1634prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1635{
1636 SV *prev = SvRV (coro_current);
1637
1638 if (coro_nready)
1639 {
1640 prepare_schedule (aTHX_ ta);
1641 api_ready (aTHX_ prev);
1642 }
1643 else
1644 prepare_nop (aTHX_ ta);
1645}
1646
1647static void
1648api_schedule (pTHX)
1649{
1650 struct coro_transfer_args ta;
1651
1652 prepare_schedule (aTHX_ &ta);
1653 TRANSFER (ta, 1);
1654}
1655
1656static int
1657api_cede (pTHX)
1658{
1659 struct coro_transfer_args ta;
1660
1661 prepare_cede (aTHX_ &ta);
1662
1663 if (expect_true (ta.prev != ta.next))
1664 {
1665 TRANSFER (ta, 1);
850 return; 1666 return 1;
1667 }
1668 else
1669 return 0;
1670}
1671
1672static int
1673api_cede_notself (pTHX)
1674{
1675 if (coro_nready)
851 } 1676 {
1677 struct coro_transfer_args ta;
852 1678
853 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1679 prepare_cede_notself (aTHX_ &ta);
1680 TRANSFER (ta, 1);
1681 return 1;
1682 }
1683 else
1684 return 0;
1685}
1686
1687static void
1688api_trace (pTHX_ SV *coro_sv, int flags)
1689{
1690 struct coro *coro = SvSTATE (coro_sv);
1691
1692 if (flags & CC_TRACE)
1693 {
1694 if (!coro->cctx)
1695 coro->cctx = cctx_new_run ();
1696 else if (!(coro->cctx->flags & CC_TRACE))
1697 croak ("cannot enable tracing on coroutine with custom stack,");
1698
1699 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1700 }
1701 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1702 {
1703 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1704
1705 if (coro->flags & CF_RUNNING)
1706 PL_runops = RUNOPS_DEFAULT;
1707 else
1708 coro->slot->runops = RUNOPS_DEFAULT;
1709 }
1710}
1711
1712/*****************************************************************************/
1713/* PerlIO::cede */
1714
1715typedef struct
1716{
1717 PerlIOBuf base;
1718 NV next, every;
1719} PerlIOCede;
1720
1721static IV
1722PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1723{
1724 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1725
1726 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1727 self->next = nvtime () + self->every;
1728
1729 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
854} 1730}
855 1731
856static SV * 1732static SV *
857coro_deq (int min_prio) 1733PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
858{ 1734{
859 int prio = PRIO_MAX - PRIO_MIN; 1735 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
860 1736
861 min_prio -= PRIO_MIN; 1737 return newSVnv (self->every);
862 if (min_prio < 0) 1738}
863 min_prio = 0;
864 1739
865 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1740static IV
866 if (av_len (coro_ready[prio]) >= 0) 1741PerlIOCede_flush (pTHX_ PerlIO *f)
1742{
1743 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1744 double now = nvtime ();
1745
1746 if (now >= self->next)
1747 {
1748 api_cede (aTHX);
1749 self->next = now + self->every;
1750 }
1751
1752 return PerlIOBuf_flush (aTHX_ f);
1753}
1754
1755static PerlIO_funcs PerlIO_cede =
1756{
1757 sizeof(PerlIO_funcs),
1758 "cede",
1759 sizeof(PerlIOCede),
1760 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1761 PerlIOCede_pushed,
1762 PerlIOBuf_popped,
1763 PerlIOBuf_open,
1764 PerlIOBase_binmode,
1765 PerlIOCede_getarg,
1766 PerlIOBase_fileno,
1767 PerlIOBuf_dup,
1768 PerlIOBuf_read,
1769 PerlIOBuf_unread,
1770 PerlIOBuf_write,
1771 PerlIOBuf_seek,
1772 PerlIOBuf_tell,
1773 PerlIOBuf_close,
1774 PerlIOCede_flush,
1775 PerlIOBuf_fill,
1776 PerlIOBase_eof,
1777 PerlIOBase_error,
1778 PerlIOBase_clearerr,
1779 PerlIOBase_setlinebuf,
1780 PerlIOBuf_get_base,
1781 PerlIOBuf_bufsiz,
1782 PerlIOBuf_get_ptr,
1783 PerlIOBuf_get_cnt,
1784 PerlIOBuf_set_ptrcnt,
1785};
1786
1787/*****************************************************************************/
1788
1789static const CV *slf_cv; /* for quick consistency check */
1790
1791static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1792static SV *slf_arg0;
1793static SV *slf_arg1;
1794static SV *slf_arg2;
1795
1796/* this restores the stack in the case we patched the entersub, to */
1797/* recreate the stack frame as perl will on following calls */
1798/* since entersub cleared the stack */
1799static OP *
1800pp_restore (pTHX)
1801{
1802 dSP;
1803
1804 PUSHMARK (SP);
1805
1806 EXTEND (SP, 3);
1807 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1808 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1809 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1810 PUSHs ((SV *)CvGV (slf_cv));
1811
1812 RETURNOP (slf_restore.op_first);
1813}
1814
1815static void
1816slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1817{
1818 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1819}
1820
1821static void
1822slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1823{
1824 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1825
1826 frame->prepare = slf_prepare_set_stacklevel;
1827 frame->check = slf_check_nop;
1828 frame->data = (void *)SvIV (arg [0]);
1829}
1830
1831static void
1832slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1833{
1834 SV **arg = (SV **)slf_frame.data;
1835
1836 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1837}
1838
1839static void
1840slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1841{
1842 if (items != 2)
1843 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1844
1845 frame->prepare = slf_prepare_transfer;
1846 frame->check = slf_check_nop;
1847 frame->data = (void *)arg; /* let's hope it will stay valid */
1848}
1849
1850static void
1851slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_schedule;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede;
1861 frame->check = slf_check_nop;
1862}
1863
1864static void
1865slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 frame->prepare = prepare_cede_notself;
1868 frame->check = slf_check_nop;
1869}
1870
1871/* we hijack an hopefully unused CV flag for our purposes */
1872#define CVf_SLF 0x4000
1873
1874/*
1875 * these not obviously related functions are all rolled into one
1876 * function to increase chances that they all will call transfer with the same
1877 * stack offset
1878 * SLF stands for "schedule-like-function".
1879 */
1880static OP *
1881pp_slf (pTHX)
1882{
1883 I32 checkmark; /* mark SP to see how many elements check has pushed */
1884
1885 /* set up the slf frame, unless it has already been set-up */
1886 /* the latter happens when a new coro has been started */
1887 /* or when a new cctx was attached to an existing coroutine */
1888 if (expect_true (!slf_frame.prepare))
1889 {
1890 /* first iteration */
1891 dSP;
1892 SV **arg = PL_stack_base + TOPMARK + 1;
1893 int items = SP - arg; /* args without function object */
1894 SV *gv = *sp;
1895
1896 /* do a quick consistency check on the "function" object, and if it isn't */
1897 /* for us, divert to the real entersub */
1898 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1899 return PL_ppaddr[OP_ENTERSUB](aTHX);
1900
1901 /* pop args */
1902 SP = PL_stack_base + POPMARK;
1903
1904 if (!(PL_op->op_flags & OPf_STACKED))
1905 {
1906 /* ampersand-form of call, use @_ instead of stack */
1907 AV *av = GvAV (PL_defgv);
1908 arg = AvARRAY (av);
1909 items = AvFILLp (av) + 1;
1910 }
1911
1912 PUTBACK;
1913
1914 /* now call the init function, which needs to set up slf_frame */
1915 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1916 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1917 }
1918
1919 /* now that we have a slf_frame, interpret it! */
1920 /* we use a callback system not to make the code needlessly */
1921 /* complicated, but so we can run multiple perl coros from one cctx */
1922
1923 do
1924 {
1925 struct coro_transfer_args ta;
1926
1927 slf_frame.prepare (aTHX_ &ta);
1928 TRANSFER (ta, 0);
1929
1930 checkmark = PL_stack_sp - PL_stack_base;
1931 }
1932 while (slf_frame.check (aTHX_ &slf_frame));
1933
1934 {
1935 dSP;
1936 SV **bot = PL_stack_base + checkmark;
1937 int gimme = GIMME_V;
1938
1939 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1940
1941 /* make sure we put something on the stack in scalar context */
1942 if (gimme == G_SCALAR)
867 { 1943 {
868 coro_nready--; 1944 if (sp == bot)
869 return av_shift (coro_ready[prio]); 1945 XPUSHs (&PL_sv_undef);
1946
1947 SP = bot + 1;
870 } 1948 }
871 1949
1950 PUTBACK;
1951 }
1952
1953 return NORMAL;
1954}
1955
1956static void
1957api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1958{
1959 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1960
1961 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1962 && PL_op->op_ppaddr != pp_slf)
1963 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1964
1965 if (items > 3)
1966 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1967
1968 CvFLAGS (cv) |= CVf_SLF;
1969 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1970 slf_cv = cv;
1971
1972 /* we patch the op, and then re-run the whole call */
1973 /* we have to put the same argument on the stack for this to work */
1974 /* and this will be done by pp_restore */
1975 slf_restore.op_next = (OP *)&slf_restore;
1976 slf_restore.op_type = OP_CUSTOM;
1977 slf_restore.op_ppaddr = pp_restore;
1978 slf_restore.op_first = PL_op;
1979
1980 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1981 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1982 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1983
1984 PL_op->op_ppaddr = pp_slf;
1985
1986 PL_op = (OP *)&slf_restore;
1987}
1988
1989/*****************************************************************************/
1990
1991static void
1992coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
1993{
1994 SV *count_sv = AvARRAY (av)[0];
1995 IV count = SvIVX (count_sv);
1996
1997 count += adjust;
1998 SvIVX (count_sv) = count;
1999
2000 /* now wake up as many waiters as are expected to lock */
2001 while (count > 0 && AvFILLp (av) > 0)
2002 {
2003 SV *cb;
2004
2005 /* swap first two elements so we can shift a waiter */
2006 AvARRAY (av)[0] = AvARRAY (av)[1];
2007 AvARRAY (av)[1] = count_sv;
2008 cb = av_shift (av);
2009
2010 if (SvOBJECT (cb))
2011 api_ready (aTHX_ cb);
2012 else
2013 croak ("callbacks not yet supported");
2014
2015 SvREFCNT_dec (cb);
2016
2017 --count;
2018 }
2019}
2020
2021static void
2022coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2023{
2024 /* call $sem->adjust (0) to possibly wake up some other waiters */
2025 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2026}
2027
2028static int
2029slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2030{
2031 AV *av = (AV *)frame->data;
2032 SV *count_sv = AvARRAY (av)[0];
2033
2034 if (SvIVX (count_sv) > 0)
2035 {
2036 SvSTATE_current->on_destroy = 0;
2037 SvIVX (count_sv) = SvIVX (count_sv) - 1;
872 return 0; 2038 return 0;
873} 2039 }
2040 else
2041 {
2042 int i;
2043 /* if we were woken up but can't down, we look through the whole */
2044 /* waiters list and only add us if we aren't in there already */
2045 /* this avoids some degenerate memory usage cases */
874 2046
875static void 2047 for (i = 1; i <= AvFILLp (av); ++i)
876api_ready (SV *coro) 2048 if (AvARRAY (av)[i] == SvRV (coro_current))
877{ 2049 return 1;
878 if (SvROK (coro))
879 coro = SvRV (coro);
880 2050
881 coro_enq (SvREFCNT_inc (coro)); 2051 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2052 return 1;
2053 }
882} 2054}
883 2055
884static void 2056static void
885api_schedule (void) 2057slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
886{ 2058{
887 SV *prev, *next; 2059 AV *av = (AV *)SvRV (arg [0]);
888 2060
889 prev = SvRV (GvSV (coro_current)); 2061 if (SvIVX (AvARRAY (av)[0]) > 0)
890 next = coro_deq (PRIO_MIN); 2062 {
2063 frame->data = (void *)av;
2064 frame->prepare = prepare_nop;
2065 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2066 }
2067 else
2068 {
2069 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
891 2070
892 if (!next) 2071 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
893 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2072 frame->prepare = prepare_schedule;
894 2073
895 /* free this only after the transfer */ 2074 /* to avoid race conditions when a woken-up coro gets terminated */
896 coro_mortal = prev; 2075 /* we arrange for a temporary on_destroy that calls adjust (0) */
897 SV_CORO (prev, "Coro::schedule"); 2076 assert (!SvSTATE_current->on_destroy);//D
2077 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2078 }
898 2079
899 SvRV (GvSV (coro_current)) = next; 2080 frame->check = slf_check_semaphore_down;
900 2081
901 SV_CORO (next, "Coro::schedule");
902
903 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
904 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
905} 2082}
906 2083
907static void 2084/*****************************************************************************/
908api_cede (void)
909{
910 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
911 2085
912 api_schedule (); 2086#define GENSUB_ARG CvXSUBANY (cv).any_ptr
913}
914 2087
2088/* create a closure from XS, returns a code reference */
2089/* the arg can be accessed via GENSUB_ARG from the callback */
2090/* the callback must use dXSARGS/XSRETURN */
2091static SV *
2092gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2093{
2094 CV *cv = (CV *)NEWSV (0, 0);
2095
2096 sv_upgrade ((SV *)cv, SVt_PVCV);
2097
2098 CvANON_on (cv);
2099 CvISXSUB_on (cv);
2100 CvXSUB (cv) = xsub;
2101 GENSUB_ARG = arg;
2102
2103 return newRV_noinc ((SV *)cv);
2104}
2105
2106/*****************************************************************************/
2107
915MODULE = Coro::State PACKAGE = Coro::State 2108MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916 2109
917PROTOTYPES: ENABLE 2110PROTOTYPES: DISABLE
918 2111
919BOOT: 2112BOOT:
920{ /* {} necessary for stoopid perl-5.6.x */ 2113{
921 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2114#ifdef USE_ITHREADS
922 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2115# if CORO_PTHREAD
2116 coro_thx = PERL_GET_CONTEXT;
2117# endif
2118#endif
2119 BOOT_PAGESIZE;
2120
2121 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2122 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2123
2124 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2125 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2126 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2127
2128 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2129 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2130 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2131
923 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2132 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
924 2133
925 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2134 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
926 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2135 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
927 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2136 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
928 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2137 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
929
930 if (!padlist_cache)
931 padlist_cache = newHV ();
932 2138
933 main_mainstack = PL_mainstack; 2139 main_mainstack = PL_mainstack;
2140 main_top_env = PL_top_env;
934 2141
2142 while (main_top_env->je_prev)
2143 main_top_env = main_top_env->je_prev;
2144
2145 {
2146 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2147
2148 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2149 hv_store_ent (PL_custom_op_names, slf,
2150 newSVpv ("coro_slf", 0), 0);
2151
2152 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2153 hv_store_ent (PL_custom_op_descs, slf,
2154 newSVpv ("coro schedule like function", 0), 0);
2155 }
2156
935 coroapi.ver = CORO_API_VERSION; 2157 coroapi.ver = CORO_API_VERSION;
2158 coroapi.rev = CORO_API_REVISION;
2159
936 coroapi.transfer = api_transfer; 2160 coroapi.transfer = api_transfer;
937}
938 2161
939Coro::State 2162 coroapi.sv_state = SvSTATE_;
940_newprocess(args) 2163 coroapi.execute_slf = api_execute_slf;
941 SV * args 2164 coroapi.prepare_nop = prepare_nop;
942 PROTOTYPE: $ 2165 coroapi.prepare_schedule = prepare_schedule;
2166 coroapi.prepare_cede = prepare_cede;
2167 coroapi.prepare_cede_notself = prepare_cede_notself;
2168
2169 {
2170 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2171
2172 if (!svp) croak ("Time::HiRes is required");
2173 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2174
2175 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2176 }
2177
2178 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2179}
2180
2181SV *
2182new (char *klass, ...)
943 CODE: 2183 CODE:
944 Coro__State coro; 2184{
2185 struct coro *coro;
2186 MAGIC *mg;
2187 HV *hv;
2188 int i;
945 2189
946 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
947 croak ("Coro::State::_newprocess expects an arrayref");
948
949 Newz (0, coro, 1, struct coro); 2190 Newz (0, coro, 1, struct coro);
2191 coro->args = newAV ();
2192 coro->flags = CF_NEW;
950 2193
951 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2194 if (coro_first) coro_first->prev = coro;
952 coro->mainstack = 0; /* actual work is done inside transfer */ 2195 coro->next = coro_first;
953 coro->stack = 0; 2196 coro_first = coro;
954 2197
955 /* same as JMPENV_BOOTSTRAP */ 2198 coro->hv = hv = newHV ();
956 /* we might be able to recycle start_env, but safe is safe */ 2199 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
957 //Zero(&coro->start_env, 1, JMPENV); 2200 mg->mg_flags |= MGf_DUP;
958 coro->start_env.je_ret = -1; 2201 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
959 coro->start_env.je_mustcatch = TRUE;
960 2202
961 RETVAL = coro; 2203 av_extend (coro->args, items - 1);
2204 for (i = 1; i < items; i++)
2205 av_push (coro->args, newSVsv (ST (i)));
2206}
962 OUTPUT: 2207 OUTPUT:
963 RETVAL 2208 RETVAL
964 2209
965void 2210void
966transfer(prev, next, flags) 2211_set_stacklevel (...)
967 SV *prev 2212 CODE:
968 SV *next 2213 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
969 int flags
970 PROTOTYPE: @
971 CODE:
972 PUTBACK;
973 SV_CORO (next, "Coro::transfer");
974 SV_CORO (prev, "Coro::transfer");
975 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
976 SPAGAIN;
977 2214
978void 2215void
979DESTROY(coro) 2216transfer (...)
980 Coro::State coro 2217 PROTOTYPE: $$
981 CODE: 2218 CODE:
2219 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
982 2220
983 if (coro->mainstack && coro->mainstack != main_mainstack) 2221bool
984 { 2222_destroy (SV *coro_sv)
985 struct coro temp; 2223 CODE:
986 2224 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
987 PUTBACK; 2225 OUTPUT:
988 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2226 RETVAL
989 LOAD(aTHX_ coro);
990 SPAGAIN;
991
992 destroy_stacks (aTHX);
993
994 LOAD((&temp)); /* this will get rid of defsv etc.. */
995 SPAGAIN;
996
997 coro->mainstack = 0;
998 }
999
1000 deallocate_stack (coro);
1001 SvREFCNT_dec (coro->args);
1002 Safefree (coro);
1003 2227
1004void 2228void
1005_exit(code) 2229_exit (int code)
1006 int code
1007 PROTOTYPE: $ 2230 PROTOTYPE: $
1008 CODE: 2231 CODE:
1009 _exit (code); 2232 _exit (code);
1010 2233
1011MODULE = Coro::State PACKAGE = Coro::Cont 2234int
2235cctx_stacksize (int new_stacksize = 0)
2236 PROTOTYPE: ;$
2237 CODE:
2238 RETVAL = cctx_stacksize;
2239 if (new_stacksize)
2240 {
2241 cctx_stacksize = new_stacksize;
2242 ++cctx_gen;
2243 }
2244 OUTPUT:
2245 RETVAL
1012 2246
1013# this is slightly dirty (should expose a c-level api) 2247int
2248cctx_max_idle (int max_idle = 0)
2249 PROTOTYPE: ;$
2250 CODE:
2251 RETVAL = cctx_max_idle;
2252 if (max_idle > 1)
2253 cctx_max_idle = max_idle;
2254 OUTPUT:
2255 RETVAL
2256
2257int
2258cctx_count ()
2259 PROTOTYPE:
2260 CODE:
2261 RETVAL = cctx_count;
2262 OUTPUT:
2263 RETVAL
2264
2265int
2266cctx_idle ()
2267 PROTOTYPE:
2268 CODE:
2269 RETVAL = cctx_idle;
2270 OUTPUT:
2271 RETVAL
1014 2272
1015void 2273void
1016yield(...) 2274list ()
1017 PROTOTYPE: @ 2275 PROTOTYPE:
2276 PPCODE:
2277{
2278 struct coro *coro;
2279 for (coro = coro_first; coro; coro = coro->next)
2280 if (coro->hv)
2281 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2282}
2283
2284void
2285call (Coro::State coro, SV *coderef)
2286 ALIAS:
2287 eval = 1
2288 CODE:
2289{
2290 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2291 {
2292 struct coro temp;
2293
2294 if (!(coro->flags & CF_RUNNING))
2295 {
2296 PUTBACK;
2297 save_perl (aTHX_ &temp);
2298 load_perl (aTHX_ coro);
2299 }
2300
2301 {
2302 dSP;
2303 ENTER;
2304 SAVETMPS;
2305 PUTBACK;
2306 PUSHSTACK;
2307 PUSHMARK (SP);
2308
2309 if (ix)
2310 eval_sv (coderef, 0);
2311 else
2312 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2313
2314 POPSTACK;
2315 SPAGAIN;
2316 FREETMPS;
2317 LEAVE;
2318 PUTBACK;
2319 }
2320
2321 if (!(coro->flags & CF_RUNNING))
2322 {
2323 save_perl (aTHX_ coro);
2324 load_perl (aTHX_ &temp);
2325 SPAGAIN;
2326 }
2327 }
2328}
2329
2330SV *
2331is_ready (Coro::State coro)
2332 PROTOTYPE: $
2333 ALIAS:
2334 is_ready = CF_READY
2335 is_running = CF_RUNNING
2336 is_new = CF_NEW
2337 is_destroyed = CF_DESTROYED
2338 CODE:
2339 RETVAL = boolSV (coro->flags & ix);
2340 OUTPUT:
2341 RETVAL
2342
2343void
2344throw (Coro::State self, SV *throw = &PL_sv_undef)
2345 PROTOTYPE: $;$
1018 CODE: 2346 CODE:
1019 static SV *returnstk;
1020 SV *sv;
1021 AV *defav = GvAV (PL_defgv);
1022 struct coro *prev, *next;
1023
1024 if (!returnstk)
1025 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1026
1027 /* set up @_ -- ugly */
1028 av_clear (defav);
1029 av_fill (defav, items - 1);
1030 while (items--)
1031 av_store (defav, items, SvREFCNT_inc (ST(items)));
1032
1033 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1034 sv = av_pop ((AV *)SvRV (returnstk));
1035 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1036 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1037 SvREFCNT_dec (sv); 2347 SvREFCNT_dec (self->throw);
2348 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1038 2349
1039 transfer(aTHX_ prev, next, 0); 2350void
2351api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2352 PROTOTYPE: $;$
2353 C_ARGS: aTHX_ coro, flags
2354
2355SV *
2356has_cctx (Coro::State coro)
2357 PROTOTYPE: $
2358 CODE:
2359 RETVAL = boolSV (!!coro->cctx);
2360 OUTPUT:
2361 RETVAL
2362
2363int
2364is_traced (Coro::State coro)
2365 PROTOTYPE: $
2366 CODE:
2367 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2368 OUTPUT:
2369 RETVAL
2370
2371UV
2372rss (Coro::State coro)
2373 PROTOTYPE: $
2374 ALIAS:
2375 usecount = 1
2376 CODE:
2377 switch (ix)
2378 {
2379 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2380 case 1: RETVAL = coro->usecount; break;
2381 }
2382 OUTPUT:
2383 RETVAL
2384
2385void
2386force_cctx ()
2387 PROTOTYPE:
2388 CODE:
2389 SvSTATE_current->cctx->idle_sp = 0;
2390
2391void
2392swap_defsv (Coro::State self)
2393 PROTOTYPE: $
2394 ALIAS:
2395 swap_defav = 1
2396 CODE:
2397 if (!self->slot)
2398 croak ("cannot swap state with coroutine that has no saved state,");
2399 else
2400 {
2401 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2402 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2403
2404 SV *tmp = *src; *src = *dst; *dst = tmp;
2405 }
1040 2406
1041MODULE = Coro::State PACKAGE = Coro 2407MODULE = Coro::State PACKAGE = Coro
1042 2408
1043# this is slightly dirty (should expose a c-level api)
1044
1045BOOT: 2409BOOT:
1046{ 2410{
1047 int i; 2411 int i;
2412
2413 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2414 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2415 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2416
2417 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2418 SvREADONLY_on (coro_current);
2419
1048 HV *stash = gv_stashpv ("Coro", TRUE); 2420 coro_stash = gv_stashpv ("Coro", TRUE);
1049 2421
1050 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2422 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2423 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2424 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2425 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2426 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2427 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056
1057 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059 2428
1060 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2429 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061 coro_ready[i] = newAV (); 2430 coro_ready[i] = newAV ();
1062 2431
1063 { 2432 {
1064 SV *sv = perl_get_sv("Coro::API", 1); 2433 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1065 2434
1066 coroapi.schedule = api_schedule; 2435 coroapi.schedule = api_schedule;
1067 coroapi.cede = api_cede; 2436 coroapi.cede = api_cede;
2437 coroapi.cede_notself = api_cede_notself;
1068 coroapi.ready = api_ready; 2438 coroapi.ready = api_ready;
2439 coroapi.is_ready = api_is_ready;
1069 coroapi.nready = &coro_nready; 2440 coroapi.nready = coro_nready;
1070 coroapi.current = coro_current; 2441 coroapi.current = coro_current;
1071 2442
1072 GCoroAPI = &coroapi; 2443 GCoroAPI = &coroapi;
1073 sv_setiv(sv, (IV)&coroapi); 2444 sv_setiv (sv, (IV)&coroapi);
1074 SvREADONLY_on(sv); 2445 SvREADONLY_on (sv);
1075 } 2446 }
1076} 2447}
1077 2448
1078#if !PERL_MICRO
1079
1080void 2449void
1081ready(self) 2450schedule (...)
1082 SV * self 2451 CODE:
2452 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2453
2454void
2455cede (...)
2456 CODE:
2457 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2458
2459void
2460cede_notself (...)
2461 CODE:
2462 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2463
2464void
2465_set_current (SV *current)
1083 PROTOTYPE: $ 2466 PROTOTYPE: $
1084 CODE: 2467 CODE:
1085 api_ready (self); 2468 SvREFCNT_dec (SvRV (coro_current));
2469 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1086 2470
1087#endif 2471void
2472_set_readyhook (SV *hook)
2473 PROTOTYPE: $
2474 CODE:
2475 SvREFCNT_dec (coro_readyhook);
2476 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1088 2477
1089int 2478int
2479prio (Coro::State coro, int newprio = 0)
2480 PROTOTYPE: $;$
2481 ALIAS:
2482 nice = 1
2483 CODE:
2484{
2485 RETVAL = coro->prio;
2486
2487 if (items > 1)
2488 {
2489 if (ix)
2490 newprio = coro->prio - newprio;
2491
2492 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2493 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2494
2495 coro->prio = newprio;
2496 }
2497}
2498 OUTPUT:
2499 RETVAL
2500
2501SV *
2502ready (SV *self)
2503 PROTOTYPE: $
2504 CODE:
2505 RETVAL = boolSV (api_ready (aTHX_ self));
2506 OUTPUT:
2507 RETVAL
2508
2509int
1090nready(...) 2510nready (...)
1091 PROTOTYPE: 2511 PROTOTYPE:
1092 CODE: 2512 CODE:
1093 RETVAL = coro_nready; 2513 RETVAL = coro_nready;
1094 OUTPUT: 2514 OUTPUT:
1095 RETVAL 2515 RETVAL
1096 2516
2517# for async_pool speedup
1097void 2518void
1098schedule(...) 2519_pool_1 (SV *cb)
1099 PROTOTYPE:
1100 CODE: 2520 CODE:
1101 api_schedule (); 2521{
2522 HV *hv = (HV *)SvRV (coro_current);
2523 struct coro *coro = SvSTATE_hv ((SV *)hv);
2524 AV *defav = GvAV (PL_defgv);
2525 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2526 AV *invoke_av;
2527 int i, len;
2528
2529 if (!invoke)
2530 {
2531 SV *old = PL_diehook;
2532 PL_diehook = 0;
2533 SvREFCNT_dec (old);
2534 croak ("\3async_pool terminate\2\n");
2535 }
2536
2537 SvREFCNT_dec (coro->saved_deffh);
2538 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2539
2540 hv_store (hv, "desc", sizeof ("desc") - 1,
2541 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2542
2543 invoke_av = (AV *)SvRV (invoke);
2544 len = av_len (invoke_av);
2545
2546 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2547
2548 if (len > 0)
2549 {
2550 av_fill (defav, len - 1);
2551 for (i = 0; i < len; ++i)
2552 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2553 }
2554}
1102 2555
1103void 2556void
1104cede(...) 2557_pool_2 (SV *cb)
1105 PROTOTYPE:
1106 CODE: 2558 CODE:
2559{
2560 struct coro *coro = SvSTATE_current;
2561
2562 sv_setsv (cb, &PL_sv_undef);
2563
2564 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2565 coro->saved_deffh = 0;
2566
2567 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2568 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2569 {
2570 SV *old = PL_diehook;
2571 PL_diehook = 0;
2572 SvREFCNT_dec (old);
2573 croak ("\3async_pool terminate\2\n");
2574 }
2575
2576 av_clear (GvAV (PL_defgv));
2577 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2578 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2579
2580 coro->prio = 0;
2581
2582 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2583 api_trace (aTHX_ coro_current, 0);
2584
2585 av_push (av_async_pool, newSVsv (coro_current));
2586}
2587
2588
2589MODULE = Coro::State PACKAGE = Coro::AIO
2590
2591void
2592_get_state (SV *self)
2593 PROTOTYPE: $
2594 PPCODE:
2595{
2596 AV *defav = GvAV (PL_defgv);
2597 AV *av = newAV ();
2598 int i;
2599 SV *data_sv = newSV (sizeof (struct io_state));
2600 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2601 SvCUR_set (data_sv, sizeof (struct io_state));
2602 SvPOK_only (data_sv);
2603
2604 data->errorno = errno;
2605 data->laststype = PL_laststype;
2606 data->laststatval = PL_laststatval;
2607 data->statcache = PL_statcache;
2608
2609 av_extend (av, AvFILLp (defav) + 1 + 1);
2610
2611 for (i = 0; i <= AvFILLp (defav); ++i)
2612 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2613
2614 av_push (av, data_sv);
2615
2616 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2617
2618 api_ready (aTHX_ self);
2619}
2620
2621void
2622_set_state (SV *state)
2623 PROTOTYPE: $
2624 PPCODE:
2625{
2626 AV *av = (AV *)SvRV (state);
2627 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2628 int i;
2629
2630 errno = data->errorno;
2631 PL_laststype = data->laststype;
2632 PL_laststatval = data->laststatval;
2633 PL_statcache = data->statcache;
2634
2635 EXTEND (SP, AvFILLp (av));
2636 for (i = 0; i < AvFILLp (av); ++i)
2637 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2638}
2639
2640
2641MODULE = Coro::State PACKAGE = Coro::AnyEvent
2642
2643BOOT:
2644 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2645
2646void
2647_schedule (...)
2648 CODE:
2649{
2650 static int incede;
2651
1107 api_cede (); 2652 api_cede_notself (aTHX);
1108 2653
2654 ++incede;
2655 while (coro_nready >= incede && api_cede (aTHX))
2656 ;
2657
2658 sv_setsv (sv_activity, &PL_sv_undef);
2659 if (coro_nready >= incede)
2660 {
2661 PUSHMARK (SP);
2662 PUTBACK;
2663 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2664 SPAGAIN;
2665 }
2666
2667 --incede;
2668}
2669
2670
2671MODULE = Coro::State PACKAGE = PerlIO::cede
2672
2673BOOT:
2674 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2675
2676MODULE = Coro::State PACKAGE = Coro::Semaphore
2677
2678SV *
2679new (SV *klass, SV *count_ = 0)
2680 CODE:
2681{
2682 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2683 AV *av = newAV ();
2684 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2685 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2686}
2687 OUTPUT:
2688 RETVAL
2689
2690SV *
2691count (SV *self)
2692 CODE:
2693 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2694 OUTPUT:
2695 RETVAL
2696
2697void
2698up (SV *self, int adjust = 1)
2699 ALIAS:
2700 adjust = 1
2701 CODE:
2702 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2703
2704void
2705down (SV *self)
2706 CODE:
2707 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2708
2709void
2710try (SV *self)
2711 PPCODE:
2712{
2713 AV *av = (AV *)SvRV (self);
2714 SV *count_sv = AvARRAY (av)[0];
2715 IV count = SvIVX (count_sv);
2716
2717 if (count > 0)
2718 {
2719 --count;
2720 SvIVX (count_sv) = count;
2721 XSRETURN_YES;
2722 }
2723 else
2724 XSRETURN_NO;
2725}
2726
2727void
2728waiters (SV *self)
2729 CODE:
2730{
2731 AV *av = (AV *)SvRV (self);
2732
2733 if (GIMME_V == G_SCALAR)
2734 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2735 else
2736 {
2737 int i;
2738 EXTEND (SP, AvFILLp (av) + 1 - 1);
2739 for (i = 1; i <= AvFILLp (av); ++i)
2740 PUSHs (newSVsv (AvARRAY (av)[i]));
2741 }
2742}
2743

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines