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Comparing Coro/Coro/State.xs (file contents):
Revision 1.61 by root, Tue Aug 10 01:56:30 2004 UTC vs.
Revision 1.280 by root, Sun Nov 16 09:43:18 2008 UTC

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

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