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Comparing Coro/Coro/State.xs (file contents):
Revision 1.68 by root, Mon Dec 12 20:28:30 2005 UTC vs.
Revision 1.236 by root, Sat May 10 17:43:41 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
8 9
9#include "patchlevel.h" 10#include "patchlevel.h"
10 11
11#if PERL_VERSION < 6 12#include <stdio.h>
13#include <errno.h>
14#include <assert.h>
15
16#ifdef WIN32
17# undef setjmp
18# undef longjmp
19# undef _exit
20# define setjmp _setjmp // deep magic, don't ask
21#else
22# include <inttypes.h> /* most portable stdint.h */
23#endif
24
25#ifdef HAVE_MMAP
26# include <unistd.h>
27# include <sys/mman.h>
28# ifndef MAP_ANONYMOUS
29# ifdef MAP_ANON
30# define MAP_ANONYMOUS MAP_ANON
31# else
32# undef HAVE_MMAP
33# endif
34# endif
35# include <limits.h>
36# ifndef PAGESIZE
37# define PAGESIZE pagesize
38# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
39static long pagesize;
40# else
41# define BOOT_PAGESIZE (void)0
42# endif
43#else
44# define PAGESIZE 0
45# define BOOT_PAGESIZE (void)0
46#endif
47
48#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif
54
55/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8
57
58#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
63
64#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 65# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 66# define PL_ppaddr ppaddr
14# endif 67# endif
15# ifndef call_sv 68# ifndef call_sv
16# define call_sv perl_call_sv 69# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 80# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 81# define IS_PADCONST(v) 0
29# endif 82# endif
30#endif 83#endif
31 84
32#include <signal.h> 85/* 5.8.8 */
33 86#ifndef GV_NOTQUAL
34#ifdef HAVE_MMAP 87# define GV_NOTQUAL 0
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
43# endif 88#endif
89#ifndef newSV
90# define newSV(l) NEWSV(0,l)
44#endif 91#endif
45 92
46#define SUB_INIT "Coro::State::initialize" 93/* 5.11 */
47#define UCORO_STATE "_coro_state" 94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
48 97
49/* The next macro should declare a variable stacklevel that contains and approximation 98/* 5.8.7 */
50 * to the current C stack pointer. Its property is that it changes with each call 99#ifndef SvRV_set
51 * and should be unique. */ 100# define SvRV_set(s,v) SvRV(s) = (v)
101#endif
102
103#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
104# undef CORO_STACKGUARD
105#endif
106
107#ifndef CORO_STACKGUARD
108# define CORO_STACKGUARD 0
109#endif
110
111/* prefer perl internal functions over our own? */
112#ifndef CORO_PREFER_PERL_FUNCTIONS
113# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif
115
116/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */
118#define dSTACKLEVEL volatile char stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 119#define STACKLEVEL ((void *)&stacklevel)
53 120
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
55 122
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 123#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value))
127#else
128# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr)
131#endif
132
133#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1)
135
136#define NOINLINE attribute ((noinline))
57 137
58#include "CoroAPI.h" 138#include "CoroAPI.h"
59 139
60#ifdef USE_ITHREADS 140#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 141static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else 144#else
65# define LOCK 0 145# define LOCK (void)0
66# define UNLOCK 0 146# define UNLOCK (void)0
67#endif 147#endif
68 148
149/* helper storage struct for Coro::AIO */
150struct io_state
151{
152 int errorno;
153 I32 laststype;
154 int laststatval;
155 Stat_t statcache;
156};
157
158static size_t coro_stacksize = CORO_STACKSIZE;
69static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 160static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env;
71static HV *coro_state_stash; 162static 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 */ 163static volatile SV *coro_mortal; /* will be freed after next transfer */
75 164
76/* this is actually not only the c stack but also c registers etc... */ 165static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook;
168static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */
170
171/* async_pool helper stuff */
172static SV *sv_pool_rss;
173static SV *sv_pool_size;
174static AV *av_async_pool;
175
176/* Coro::AnyEvent */
177static SV *sv_activity;
178
179static struct coro_cctx *cctx_first;
180static int cctx_count, cctx_idle;
181
182enum {
183 CC_MAPPED = 0x01,
184 CC_NOREUSE = 0x02, /* throw this away after tracing */
185 CC_TRACE = 0x04,
186 CC_TRACE_SUB = 0x08, /* trace sub calls */
187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189};
190
191/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx {
193 struct coro_cctx *next;
194
195 /* the stack */
196 void *sptr;
197 size_t ssize;
198
199 /* cpu state */
200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202 JMPENV *top_env;
203 coro_context cctx;
204
205#if CORO_USE_VALGRIND
206 int valgrind_id;
207#endif
208 unsigned char flags;
209} coro_cctx;
210
211enum {
212 CF_RUNNING = 0x0001, /* coroutine is running */
213 CF_READY = 0x0002, /* coroutine is ready */
214 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216};
217
218/* the structure where most of the perl state is stored, overlaid on the cxstack */
77typedef struct { 219typedef struct {
78 int refcnt; /* pointer reference counter */ 220 SV *defsv;
79 int usecnt; /* shared by how many coroutines */ 221 AV *defav;
80 int gencnt; /* generation counter */ 222 SV *errsv;
223 SV *irsgv;
224#define VAR(name,type) type name;
225# include "state.h"
226#undef VAR
227} perl_slots;
81 228
82 coro_context cctx; 229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
83 230
84 void *sptr; 231/* this is a structure representing a perl-level coroutine */
85 long ssize; /* positive == mmap, otherwise malloc */
86} coro_stack;
87
88struct coro { 232struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 233 /* the c coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 234 coro_cctx *cctx;
91 235
92 /* the optional C context */ 236 /* process data */
93 coro_stack *stack;
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; 237 AV *mainstack;
110 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 CV *compcv;
115 SV **stack_base;
116 SV **stack_max;
117 SV **tmps_stack;
118 I32 tmps_floor;
119 I32 tmps_ix;
120 I32 tmps_max;
121 I32 *markstack;
122 I32 *markstack_ptr;
123 I32 *markstack_max;
124 I32 *scopestack;
125 I32 scopestack_ix;
126 I32 scopestack_max;
127 ANY *savestack;
128 I32 savestack_ix;
129 I32 savestack_max;
130 OP **retstack;
131 I32 retstack_ix;
132 I32 retstack_max;
133 PMOP *curpm;
134 COP *curcop;
135 JMPENV *top_env;
136 239
137 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
138 AV *args; 241 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */
244
245 /* statistics */
246 int usecount; /* number of transfers to this coro */
247
248 /* coro process data */
249 int prio;
250 SV *throw; /* exception to be thrown */
251
252 /* async_pool */
253 SV *saved_deffh;
254
255 /* linked list */
256 struct coro *next, *prev;
139}; 257};
140 258
141typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
142typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
143 261
144/* mostly copied from op.c:cv_clone2 */ 262/** Coro ********************************************************************/
145STATIC AV * 263
146clone_padlist (pTHX_ AV *protopadlist) 264#define PRIO_MAX 3
265#define PRIO_HIGH 1
266#define PRIO_NORMAL 0
267#define PRIO_LOW -1
268#define PRIO_IDLE -3
269#define PRIO_MIN -4
270
271/* for Coro.pm */
272static SV *coro_current;
273static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
275static int coro_nready;
276static struct coro *coro_first;
277
278/** lowlevel stuff **********************************************************/
279
280static SV *
281coro_get_sv (pTHX_ const char *name, int create)
147{ 282{
148 AV *av; 283#if PERL_VERSION_ATLEAST (5,10,0)
149 I32 ix; 284 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
150 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 285 get_sv (name, create);
151 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 286#endif
152 SV **pname = AvARRAY (protopad_name); 287 return get_sv (name, create);
153 SV **ppad = AvARRAY (protopad); 288}
154 I32 fname = AvFILLp (protopad_name); 289
155 I32 fpad = AvFILLp (protopad); 290static AV *
291coro_get_av (pTHX_ const char *name, int create)
292{
293#if PERL_VERSION_ATLEAST (5,10,0)
294 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
295 get_av (name, create);
296#endif
297 return get_av (name, create);
298}
299
300static HV *
301coro_get_hv (pTHX_ const char *name, int create)
302{
303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_hv (name, create);
306#endif
307 return get_hv (name, create);
308}
309
310static AV *
311coro_clone_padlist (pTHX_ CV *cv)
312{
313 AV *padlist = CvPADLIST (cv);
156 AV *newpadlist, *newpad_name, *newpad; 314 AV *newpadlist, *newpad;
157 SV **npad;
158
159 newpad_name = newAV ();
160 for (ix = fname; ix >= 0; ix--)
161 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
162
163 newpad = newAV ();
164 av_fill (newpad, AvFILLp (protopad));
165 npad = AvARRAY (newpad);
166 315
167 newpadlist = newAV (); 316 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
169 av_store (newpadlist, 0, (SV *) newpad_name); 318#if PERL_VERSION_ATLEAST (5,10,0)
319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
320#else
321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif
323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324 --AvFILLp (padlist);
325
326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
170 av_store (newpadlist, 1, (SV *) newpad); 327 av_store (newpadlist, 1, (SV *)newpad);
171
172 av = newAV (); /* will be @_ */
173 av_extend (av, 0);
174 av_store (newpad, 0, (SV *) av);
175 AvFLAGS (av) = AVf_REIFY;
176
177 for (ix = fpad; ix > 0; ix--)
178 {
179 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
180
181 if (namesv && namesv != &PL_sv_undef)
182 {
183 char *name = SvPVX (namesv); /* XXX */
184
185 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
186 { /* lexical from outside? */
187 npad[ix] = SvREFCNT_inc (ppad[ix]);
188 }
189 else
190 { /* our own lexical */
191 SV *sv;
192 if (*name == '&')
193 sv = SvREFCNT_inc (ppad[ix]);
194 else if (*name == '@')
195 sv = (SV *) newAV ();
196 else if (*name == '%')
197 sv = (SV *) newHV ();
198 else
199 sv = NEWSV (0, 0);
200
201#ifdef SvPADBUSY
202 if (!SvPADBUSY (sv))
203#endif
204 SvPADMY_on (sv);
205
206 npad[ix] = sv;
207 }
208 }
209 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
210 {
211 npad[ix] = SvREFCNT_inc (ppad[ix]);
212 }
213 else
214 {
215 SV *sv = NEWSV (0, 0);
216 SvPADTMP_on (sv);
217 npad[ix] = sv;
218 }
219 }
220
221#if 0 /* return -ENOTUNDERSTOOD */
222 /* Now that vars are all in place, clone nested closures. */
223
224 for (ix = fpad; ix > 0; ix--) {
225 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
226 if (namesv
227 && namesv != &PL_sv_undef
228 && !(SvFLAGS(namesv) & SVf_FAKE)
229 && *SvPVX(namesv) == '&'
230 && CvCLONE(ppad[ix]))
231 {
232 CV *kid = cv_clone((CV*)ppad[ix]);
233 SvREFCNT_dec(ppad[ix]);
234 CvCLONE_on(kid);
235 SvPADMY_on(kid);
236 npad[ix] = (SV*)kid;
237 }
238 }
239#endif
240 328
241 return newpadlist; 329 return newpadlist;
242} 330}
243 331
244STATIC void 332static void
245free_padlist (pTHX_ AV *padlist) 333free_padlist (pTHX_ AV *padlist)
246{ 334{
247 /* may be during global destruction */ 335 /* may be during global destruction */
248 if (SvREFCNT (padlist)) 336 if (SvREFCNT (padlist))
249 { 337 {
… …
263 351
264 SvREFCNT_dec ((SV*)padlist); 352 SvREFCNT_dec ((SV*)padlist);
265 } 353 }
266} 354}
267 355
268STATIC int 356static int
269coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 357coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270{ 358{
271 AV *padlist; 359 AV *padlist;
272 AV *av = (AV *)mg->mg_obj; 360 AV *av = (AV *)mg->mg_obj;
273 361
274 /* casting is fun. */ 362 /* casting is fun. */
275 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276 free_padlist (aTHX_ padlist); 364 free_padlist (aTHX_ padlist);
277 365
278 SvREFCNT_dec (av); 366 return 0;
279} 367}
280 368
281#define PERL_MAGIC_coro PERL_MAGIC_ext 369#define CORO_MAGIC_type_cv PERL_MAGIC_ext
370#define CORO_MAGIC_type_state PERL_MAGIC_ext
282 371
283static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 372static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0,
374 coro_cv_free
375};
376
377#define CORO_MAGIC(sv,type) \
378 SvMAGIC (sv) \
379 ? SvMAGIC (sv)->mg_type == type \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0
383
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
385#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
386
387static struct coro *
388SvSTATE_ (pTHX_ SV *coro)
389{
390 HV *stash;
391 MAGIC *mg;
392
393 if (SvROK (coro))
394 coro = SvRV (coro);
395
396 if (expect_false (SvTYPE (coro) != SVt_PVHV))
397 croak ("Coro::State object required");
398
399 stash = SvSTASH (coro);
400 if (expect_false (stash != coro_stash && stash != coro_state_stash))
401 {
402 /* very slow, but rare, check */
403 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
404 croak ("Coro::State object required");
405 }
406
407 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr;
409}
410
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
284 412
285/* the next two functions merely cache the padlists */ 413/* the next two functions merely cache the padlists */
286STATIC void 414static void
287get_padlist (pTHX_ CV *cv) 415get_padlist (pTHX_ CV *cv)
288{ 416{
289 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 417 MAGIC *mg = CORO_MAGIC_cv (cv);
418 AV *av;
290 419
291 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
292 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
293 else 422 else
423 {
424#if CORO_PREFER_PERL_FUNCTIONS
425 /* this is probably cleaner, but also slower? */
426 CV *cp = Perl_cv_clone (cv);
427 CvPADLIST (cv) = CvPADLIST (cp);
428 CvPADLIST (cp) = 0;
429 SvREFCNT_dec (cp);
430#else
294 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
432#endif
433 }
295} 434}
296 435
297STATIC void 436static void
298put_padlist (pTHX_ CV *cv) 437put_padlist (pTHX_ CV *cv)
299{ 438{
300 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 439 MAGIC *mg = CORO_MAGIC_cv (cv);
440 AV *av;
301 441
302 if (!mg) 442 if (expect_false (!mg))
303 { 443 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
304 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
305 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
306 mg->mg_virtual = &vtbl_coro;
307 mg->mg_obj = (SV *)newAV ();
308 }
309 444
310 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 445 av = (AV *)mg->mg_obj;
311}
312 446
313#define SB do { 447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
314#define SE } while (0) 448 av_extend (av, AvMAX (av) + 1);
315 449
316#define LOAD(state) load_state(aTHX_ (state)); 450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
317#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 451}
318 452
319#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 453/** load & save, init *******************************************************/
320 454
321static void 455static void
322load_state(pTHX_ Coro__State c) 456load_perl (pTHX_ Coro__State c)
323{ 457{
324 PL_dowarn = c->dowarn; 458 perl_slots *slot = c->slot;
325 PL_in_eval = c->in_eval; 459 c->slot = 0;
326 460
327 PL_curstackinfo = c->curstackinfo;
328 PL_curstack = c->curstack;
329 PL_mainstack = c->mainstack; 461 PL_mainstack = c->mainstack;
330 PL_stack_sp = c->stack_sp;
331 PL_op = c->op;
332 PL_curpad = c->curpad;
333 PL_comppad = c->comppad;
334 PL_compcv = c->compcv;
335 PL_stack_base = c->stack_base;
336 PL_stack_max = c->stack_max;
337 PL_tmps_stack = c->tmps_stack;
338 PL_tmps_floor = c->tmps_floor;
339 PL_tmps_ix = c->tmps_ix;
340 PL_tmps_max = c->tmps_max;
341 PL_markstack = c->markstack;
342 PL_markstack_ptr = c->markstack_ptr;
343 PL_markstack_max = c->markstack_max;
344 PL_scopestack = c->scopestack;
345 PL_scopestack_ix = c->scopestack_ix;
346 PL_scopestack_max = c->scopestack_max;
347 PL_savestack = c->savestack;
348 PL_savestack_ix = c->savestack_ix;
349 PL_savestack_max = c->savestack_max;
350 PL_retstack = c->retstack;
351 PL_retstack_ix = c->retstack_ix;
352 PL_retstack_max = c->retstack_max;
353 PL_curpm = c->curpm;
354 PL_curcop = c->curcop;
355 PL_top_env = c->top_env;
356 462
357 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 463 GvSV (PL_defgv) = slot->defsv;
358 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 464 GvAV (PL_defgv) = slot->defav;
359 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 465 GvSV (PL_errgv) = slot->errsv;
466 GvSV (irsgv) = slot->irsgv;
467
468 #define VAR(name,type) PL_ ## name = slot->name;
469 # include "state.h"
470 #undef VAR
360 471
361 { 472 {
362 dSP; 473 dSP;
474
363 CV *cv; 475 CV *cv;
364 476
365 /* now do the ugly restore mess */ 477 /* now do the ugly restore mess */
366 while ((cv = (CV *)POPs)) 478 while (expect_true (cv = (CV *)POPs))
367 { 479 {
368 AV *padlist = (AV *)POPs;
369
370 if (padlist)
371 {
372 put_padlist (aTHX_ cv); /* mark this padlist as available */ 480 put_padlist (aTHX_ cv); /* mark this padlist as available */
373 CvPADLIST(cv) = padlist; 481 CvDEPTH (cv) = PTR2IV (POPs);
374 } 482 CvPADLIST (cv) = (AV *)POPs;
375
376 ++CvDEPTH(cv);
377 } 483 }
378 484
379 PUTBACK; 485 PUTBACK;
380 } 486 }
381} 487}
382 488
383static void 489static void
384save_state(pTHX_ Coro__State c, int flags) 490save_perl (pTHX_ Coro__State c)
385{ 491{
386 { 492 {
387 dSP; 493 dSP;
388 I32 cxix = cxstack_ix; 494 I32 cxix = cxstack_ix;
389 PERL_CONTEXT *ccstk = cxstack; 495 PERL_CONTEXT *ccstk = cxstack;
… …
392 /* 498 /*
393 * the worst thing you can imagine happens first - we have to save 499 * the worst thing you can imagine happens first - we have to save
394 * (and reinitialize) all cv's in the whole callchain :( 500 * (and reinitialize) all cv's in the whole callchain :(
395 */ 501 */
396 502
397 PUSHs (Nullsv); 503 XPUSHs (Nullsv);
398 /* this loop was inspired by pp_caller */ 504 /* this loop was inspired by pp_caller */
399 for (;;) 505 for (;;)
400 { 506 {
401 while (cxix >= 0) 507 while (expect_true (cxix >= 0))
402 { 508 {
403 PERL_CONTEXT *cx = &ccstk[cxix--]; 509 PERL_CONTEXT *cx = &ccstk[cxix--];
404 510
405 if (CxTYPE(cx) == CXt_SUB) 511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
406 { 512 {
407 CV *cv = cx->blk_sub.cv; 513 CV *cv = cx->blk_sub.cv;
514
408 if (CvDEPTH(cv)) 515 if (expect_true (CvDEPTH (cv)))
409 { 516 {
410 EXTEND (SP, CvDEPTH(cv)*2); 517 EXTEND (SP, 3);
411
412 while (--CvDEPTH(cv))
413 {
414 /* this tells the restore code to increment CvDEPTH */
415 PUSHs (Nullsv);
416 PUSHs ((SV *)cv);
417 }
418
419 PUSHs ((SV *)CvPADLIST(cv)); 518 PUSHs ((SV *)CvPADLIST (cv));
519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
420 PUSHs ((SV *)cv); 520 PUSHs ((SV *)cv);
421 521
522 CvDEPTH (cv) = 0;
422 get_padlist (aTHX_ cv); /* this is a monster */ 523 get_padlist (aTHX_ cv);
423 } 524 }
424 } 525 }
425#ifdef CXt_FORMAT
426 else if (CxTYPE(cx) == CXt_FORMAT)
427 {
428 /* I never used formats, so how should I know how these are implemented? */
429 /* my bold guess is as a simple, plain sub... */
430 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
431 }
432#endif
433 } 526 }
434 527
435 if (top_si->si_type == PERLSI_MAIN) 528 if (expect_true (top_si->si_type == PERLSI_MAIN))
436 break; 529 break;
437 530
438 top_si = top_si->si_prev; 531 top_si = top_si->si_prev;
439 ccstk = top_si->si_cxstack; 532 ccstk = top_si->si_cxstack;
440 cxix = top_si->si_cxix; 533 cxix = top_si->si_cxix;
441 } 534 }
442 535
443 PUTBACK; 536 PUTBACK;
444 } 537 }
445 538
446 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 539 /* allocate some space on the context stack for our purposes */
447 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 540 /* we manually unroll here, as usually 2 slots is enough */
448 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 541 if (SLOT_COUNT >= 1) CXINC;
542 if (SLOT_COUNT >= 2) CXINC;
543 if (SLOT_COUNT >= 3) CXINC;
544 {
545 int i;
546 for (i = 3; i < SLOT_COUNT; ++i)
547 CXINC;
548 }
549 cxstack_ix -= SLOT_COUNT; /* undo allocation */
449 550
450 c->dowarn = PL_dowarn;
451 c->in_eval = PL_in_eval;
452
453 c->curstackinfo = PL_curstackinfo;
454 c->curstack = PL_curstack;
455 c->mainstack = PL_mainstack; 551 c->mainstack = PL_mainstack;
456 c->stack_sp = PL_stack_sp; 552
457 c->op = PL_op; 553 {
458 c->curpad = PL_curpad; 554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
459 c->comppad = PL_comppad; 555
460 c->compcv = PL_compcv; 556 slot->defav = GvAV (PL_defgv);
461 c->stack_base = PL_stack_base; 557 slot->defsv = DEFSV;
462 c->stack_max = PL_stack_max; 558 slot->errsv = ERRSV;
463 c->tmps_stack = PL_tmps_stack; 559 slot->irsgv = GvSV (irsgv);
464 c->tmps_floor = PL_tmps_floor; 560
465 c->tmps_ix = PL_tmps_ix; 561 #define VAR(name,type) slot->name = PL_ ## name;
466 c->tmps_max = PL_tmps_max; 562 # include "state.h"
467 c->markstack = PL_markstack; 563 #undef VAR
468 c->markstack_ptr = PL_markstack_ptr; 564 }
469 c->markstack_max = PL_markstack_max;
470 c->scopestack = PL_scopestack;
471 c->scopestack_ix = PL_scopestack_ix;
472 c->scopestack_max = PL_scopestack_max;
473 c->savestack = PL_savestack;
474 c->savestack_ix = PL_savestack_ix;
475 c->savestack_max = PL_savestack_max;
476 c->retstack = PL_retstack;
477 c->retstack_ix = PL_retstack_ix;
478 c->retstack_max = PL_retstack_max;
479 c->curpm = PL_curpm;
480 c->curcop = PL_curcop;
481 c->top_env = PL_top_env;
482} 565}
483 566
484/* 567/*
485 * allocate various perl stacks. This is an exact copy 568 * allocate various perl stacks. This is an exact copy
486 * of perl.c:init_stacks, except that it uses less memory 569 * of perl.c:init_stacks, except that it uses less memory
487 * on the (sometimes correct) assumption that coroutines do 570 * on the (sometimes correct) assumption that coroutines do
488 * not usually need a lot of stackspace. 571 * not usually need a lot of stackspace.
489 */ 572 */
490STATIC void 573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
576static void
491coro_init_stacks (pTHX) 577coro_init_stacks (pTHX)
492{ 578{
493 LOCK; 579 PL_curstackinfo = new_stackinfo(32, 8);
494
495 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
496 PL_curstackinfo->si_type = PERLSI_MAIN; 580 PL_curstackinfo->si_type = PERLSI_MAIN;
497 PL_curstack = PL_curstackinfo->si_stack; 581 PL_curstack = PL_curstackinfo->si_stack;
498 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
499 583
500 PL_stack_base = AvARRAY(PL_curstack); 584 PL_stack_base = AvARRAY(PL_curstack);
501 PL_stack_sp = PL_stack_base; 585 PL_stack_sp = PL_stack_base;
502 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
503 587
504 New(50,PL_tmps_stack,96,SV*); 588 New(50,PL_tmps_stack,32,SV*);
505 PL_tmps_floor = -1; 589 PL_tmps_floor = -1;
506 PL_tmps_ix = -1; 590 PL_tmps_ix = -1;
507 PL_tmps_max = 96; 591 PL_tmps_max = 32;
508 592
509 New(54,PL_markstack,16,I32); 593 New(54,PL_markstack,16,I32);
510 PL_markstack_ptr = PL_markstack; 594 PL_markstack_ptr = PL_markstack;
511 PL_markstack_max = PL_markstack + 16; 595 PL_markstack_max = PL_markstack + 16;
512 596
513#ifdef SET_MARK_OFFSET 597#ifdef SET_MARK_OFFSET
514 SET_MARK_OFFSET; 598 SET_MARK_OFFSET;
515#endif 599#endif
516 600
517 New(54,PL_scopestack,16,I32); 601 New(54,PL_scopestack,8,I32);
518 PL_scopestack_ix = 0; 602 PL_scopestack_ix = 0;
519 PL_scopestack_max = 16; 603 PL_scopestack_max = 8;
520 604
521 New(54,PL_savestack,96,ANY); 605 New(54,PL_savestack,24,ANY);
522 PL_savestack_ix = 0; 606 PL_savestack_ix = 0;
523 PL_savestack_max = 96; 607 PL_savestack_max = 24;
524 608
609#if !PERL_VERSION_ATLEAST (5,10,0)
525 New(54,PL_retstack,8,OP*); 610 New(54,PL_retstack,4,OP*);
526 PL_retstack_ix = 0; 611 PL_retstack_ix = 0;
527 PL_retstack_max = 8; 612 PL_retstack_max = 4;
528 613#endif
529 UNLOCK;
530} 614}
615#endif
531 616
532/* 617/*
533 * destroy the stacks, the callchain etc... 618 * destroy the stacks, the callchain etc...
534 */ 619 */
535STATIC void 620static void
536destroy_stacks(pTHX) 621coro_destroy_stacks (pTHX)
537{ 622{
538 if (!IN_DESTRUCT)
539 {
540 /* is this ugly, I ask? */
541 LEAVE_SCOPE (0);
542
543 /* sure it is, but more important: is it correct?? :/ */
544 FREETMPS;
545
546 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
547 }
548
549 while (PL_curstackinfo->si_next) 623 while (PL_curstackinfo->si_next)
550 PL_curstackinfo = PL_curstackinfo->si_next; 624 PL_curstackinfo = PL_curstackinfo->si_next;
551 625
552 while (PL_curstackinfo) 626 while (PL_curstackinfo)
553 { 627 {
554 PERL_SI *p = PL_curstackinfo->si_prev; 628 PERL_SI *p = PL_curstackinfo->si_prev;
555 629
556 { /*D*//*remove*/
557 dSP;
558 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
559 PUTBACK; /* possibly superfluous */
560 }
561
562 if (!IN_DESTRUCT) 630 if (!IN_DESTRUCT)
563 {
564 dounwind (-1);/*D*//*remove*/
565 SvREFCNT_dec (PL_curstackinfo->si_stack); 631 SvREFCNT_dec (PL_curstackinfo->si_stack);
566 }
567 632
568 Safefree (PL_curstackinfo->si_cxstack); 633 Safefree (PL_curstackinfo->si_cxstack);
569 Safefree (PL_curstackinfo); 634 Safefree (PL_curstackinfo);
570 PL_curstackinfo = p; 635 PL_curstackinfo = p;
571 } 636 }
572 637
573 Safefree (PL_tmps_stack); 638 Safefree (PL_tmps_stack);
574 Safefree (PL_markstack); 639 Safefree (PL_markstack);
575 Safefree (PL_scopestack); 640 Safefree (PL_scopestack);
576 Safefree (PL_savestack); 641 Safefree (PL_savestack);
642#if !PERL_VERSION_ATLEAST (5,10,0)
577 Safefree (PL_retstack); 643 Safefree (PL_retstack);
644#endif
645}
646
647static size_t
648coro_rss (pTHX_ struct coro *coro)
649{
650 size_t rss = sizeof (*coro);
651
652 if (coro->mainstack)
653 {
654 perl_slots tmp_slot;
655 perl_slots *slot;
656
657 if (coro->flags & CF_RUNNING)
658 {
659 slot = &tmp_slot;
660
661 #define VAR(name,type) slot->name = PL_ ## name;
662 # include "state.h"
663 #undef VAR
664 }
665 else
666 slot = coro->slot;
667
668 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY);
675
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *);
678#endif
679 }
680
681 return rss;
682}
683
684/** coroutine stack handling ************************************************/
685
686static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
687static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
688
689/*
690 * This overrides the default magic get method of %SIG elements.
691 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
692 * and instead of tryign to save and restore the hash elements, we just provide
693 * readback here.
694 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
695 * not expecting this to actually change the hook. This is a potential problem
696 * when a schedule happens then, but we ignore this.
697 */
698static int
699coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
700{
701 const char *s = MgPV_nolen_const (mg);
702
703 if (*s == '_')
704 {
705 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
706 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
707 }
708
709 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
710}
711
712static int
713coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
714{
715 const char *s = MgPV_nolen_const (mg);
716
717 if (*s == '_')
718 {
719 SV **svp = 0;
720
721 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
722 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
723
724 if (svp)
725 {
726 SV *old = *svp;
727 *svp = newSVsv (sv);
728 SvREFCNT_dec (old);
729 return 0;
730 }
731 }
732
733 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
578} 734}
579 735
580static void 736static void
581allocate_stack (Coro__State ctx, int alloc) 737coro_setup (pTHX_ struct coro *coro)
582{
583 coro_stack *stack;
584
585 New (0, stack, 1, coro_stack);
586
587 stack->refcnt = 1;
588 stack->usecnt = 1;
589 stack->gencnt = ctx->gencnt = 0;
590
591 if (alloc)
592 {
593#if HAVE_MMAP
594 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
595 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
596 if (stack->sptr == (void *)-1)
597#endif
598 {
599 /*FIXME*//*D*//* reasonable stack size! */
600 stack->ssize = - (STACKSIZE * sizeof (long));
601 New (0, stack->sptr, STACKSIZE, long);
602 }
603 }
604 else
605 stack->sptr = 0;
606
607 ctx->stack = stack;
608}
609
610static void
611deallocate_stack (Coro__State ctx)
612{
613 coro_stack *stack = ctx->stack;
614
615 ctx->stack = 0;
616
617 if (stack)
618 {
619 if (!--stack->refcnt)
620 {
621#ifdef HAVE_MMAP
622 if (stack->ssize > 0 && stack->sptr)
623 munmap (stack->sptr, stack->ssize);
624 else
625#endif
626 Safefree (stack->sptr);
627
628 Safefree (stack);
629 }
630 else if (ctx->gencnt == stack->gencnt)
631 --stack->usecnt;
632 }
633}
634
635static void
636setup_coro (void *arg)
637{ 738{
638 /* 739 /*
639 * emulate part of the perl startup here. 740 * emulate part of the perl startup here.
640 */ 741 */
641 dTHX;
642 dSP;
643 Coro__State ctx = (Coro__State)arg;
644 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
645
646 coro_init_stacks (aTHX); 742 coro_init_stacks (aTHX);
647 /*PL_curcop = 0;*/ 743
648 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 744 PL_runops = RUNOPS_DEFAULT;
745 PL_curcop = &PL_compiling;
746 PL_in_eval = EVAL_NULL;
747 PL_comppad = 0;
748 PL_curpm = 0;
749 PL_curpad = 0;
750 PL_localizing = 0;
751 PL_dirty = 0;
752 PL_restartop = 0;
753#if PERL_VERSION_ATLEAST (5,10,0)
754 PL_parser = 0;
755#endif
756
757 /* recreate the die/warn hooks */
758 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
759 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
760
761 GvSV (PL_defgv) = newSV (0);
762 GvAV (PL_defgv) = coro->args; coro->args = 0;
763 GvSV (PL_errgv) = newSV (0);
764 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
765 PL_rs = newSVsv (GvSV (irsgv));
766 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
767
768 {
769 dSP;
770 LOGOP myop;
771
772 Zero (&myop, 1, LOGOP);
773 myop.op_next = Nullop;
774 myop.op_flags = OPf_WANT_VOID;
775
776 PUSHMARK (SP);
777 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
778 PUTBACK;
779 PL_op = (OP *)&myop;
780 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
781 SPAGAIN;
782 }
783
784 /* this newly created coroutine might be run on an existing cctx which most
785 * likely was suspended in set_stacklevel, called from entersub.
786 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
787 * so we ENTER here for symmetry
788 */
789 ENTER;
790}
791
792static void
793coro_destroy (pTHX_ struct coro *coro)
794{
795 if (!IN_DESTRUCT)
796 {
797 /* restore all saved variables and stuff */
798 LEAVE_SCOPE (0);
799 assert (PL_tmps_floor == -1);
800
801 /* free all temporaries */
802 FREETMPS;
803 assert (PL_tmps_ix == -1);
804
805 /* unwind all extra stacks */
806 POPSTACK_TO (PL_mainstack);
807
808 /* unwind main stack */
809 dounwind (-1);
810 }
811
812 SvREFCNT_dec (GvSV (PL_defgv));
649 SvREFCNT_dec (GvAV (PL_defgv)); 813 SvREFCNT_dec (GvAV (PL_defgv));
650 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 814 SvREFCNT_dec (GvSV (PL_errgv));
815 SvREFCNT_dec (PL_defoutgv);
816 SvREFCNT_dec (PL_rs);
817 SvREFCNT_dec (GvSV (irsgv));
651 818
652 SPAGAIN; 819 SvREFCNT_dec (PL_diehook);
820 SvREFCNT_dec (PL_warnhook);
821
822 SvREFCNT_dec (coro->saved_deffh);
823 SvREFCNT_dec (coro->throw);
653 824
654 if (ctx->stack) 825 coro_destroy_stacks (aTHX);
655 {
656 ctx->cursp = 0;
657
658 PUSHMARK(SP);
659 PUTBACK;
660 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
661
662 if (SvTRUE (ERRSV))
663 croak (NULL);
664 else
665 croak ("FATAL: CCTXT coroutine returned!");
666 }
667 else
668 {
669 UNOP myop;
670
671 PL_op = (OP *)&myop;
672
673 Zero(&myop, 1, UNOP);
674 myop.op_next = Nullop;
675 myop.op_flags = OPf_WANT_VOID;
676
677 PUSHMARK(SP);
678 XPUSHs (sub_init);
679 /*
680 * the next line is slightly wrong, as PL_op->op_next
681 * is actually being executed so we skip the first op.
682 * that doesn't matter, though, since it is only
683 * pp_nextstate and we never return...
684 * ah yes, and I don't care anyways ;)
685 */
686 PUTBACK;
687 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
688 SPAGAIN;
689
690 ENTER; /* necessary e.g. for dounwind */
691 }
692} 826}
693 827
694static void 828static void
695continue_coro (void *arg) 829free_coro_mortal (pTHX)
696{ 830{
697 /* 831 if (expect_true (coro_mortal))
698 * this is a _very_ stripped down perl interpreter ;) 832 {
699 */ 833 SvREFCNT_dec (coro_mortal);
700 dTHX; 834 coro_mortal = 0;
701 Coro__State ctx = (Coro__State)arg;
702 JMPENV coro_start_env;
703
704 PL_top_env = &ctx->start_env;
705
706 ctx->cursp = 0;
707 PL_op = PL_op->op_next;
708 CALLRUNOPS(aTHX);
709
710 abort ();
711}
712
713STATIC void
714transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
715{
716 dSTACKLEVEL;
717
718 if (prev != next)
719 { 835 }
720 if (next->mainstack) 836}
837
838static int
839runops_trace (pTHX)
840{
841 COP *oldcop = 0;
842 int oldcxix = -2;
843 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
844 coro_cctx *cctx = coro->cctx;
845
846 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
847 {
848 PERL_ASYNC_CHECK ();
849
850 if (cctx->flags & CC_TRACE_ALL)
721 { 851 {
722 LOCK; 852 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
723 SAVE (prev, flags);
724 LOAD (next);
725 UNLOCK;
726
727 /* mark this state as in-use */
728 next->mainstack = 0;
729 next->tmps_ix = -2;
730
731 /* stacklevel changed? if yes, grab the stack for us! */
732 if (flags & TRANSFER_SAVE_CCTXT)
733 { 853 {
734 if (!prev->stack) 854 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
735 allocate_stack (prev, 0); 855 SV **bot, **top;
736 else if (prev->cursp != stacklevel 856 AV *av = newAV (); /* return values */
737 && prev->stack->usecnt > 1) 857 SV **cb;
858 dSP;
859
860 GV *gv = CvGV (cx->blk_sub.cv);
861 SV *fullname = sv_2mortal (newSV (0));
862 if (isGV (gv))
863 gv_efullname3 (fullname, gv, 0);
864
865 bot = PL_stack_base + cx->blk_oldsp + 1;
866 top = cx->blk_gimme == G_ARRAY ? SP + 1
867 : cx->blk_gimme == G_SCALAR ? bot + 1
868 : bot;
869
870 av_extend (av, top - bot);
871 while (bot < top)
872 av_push (av, SvREFCNT_inc (*bot++));
873
874 PL_runops = RUNOPS_DEFAULT;
875 ENTER;
876 SAVETMPS;
877 EXTEND (SP, 3);
878 PUSHMARK (SP);
879 PUSHs (&PL_sv_no);
880 PUSHs (fullname);
881 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
882 PUTBACK;
883 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
884 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
885 SPAGAIN;
886 FREETMPS;
887 LEAVE;
888 PL_runops = runops_trace;
889 }
890
891 if (oldcop != PL_curcop)
892 {
893 oldcop = PL_curcop;
894
895 if (PL_curcop != &PL_compiling)
738 { 896 {
739 prev->gencnt = ++prev->stack->gencnt; 897 SV **cb;
740 prev->stack->usecnt = 1;
741 }
742 898
743 /* has our stack been invalidated? */ 899 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
744 if (next->stack && next->stack->gencnt != next->gencnt)
745 { 900 {
746 deallocate_stack (next); 901 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
747 allocate_stack (next, 1); 902
748 coro_create (&(next->stack->cctx), 903 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
749 continue_coro, (void *)next, 904 {
750 next->stack->sptr, labs (next->stack->ssize)); 905 runops_proc_t old_runops = PL_runops;
906 dSP;
907 GV *gv = CvGV (cx->blk_sub.cv);
908 SV *fullname = sv_2mortal (newSV (0));
909
910 if (isGV (gv))
911 gv_efullname3 (fullname, gv, 0);
912
913 PL_runops = RUNOPS_DEFAULT;
914 ENTER;
915 SAVETMPS;
916 EXTEND (SP, 3);
917 PUSHMARK (SP);
918 PUSHs (&PL_sv_yes);
919 PUSHs (fullname);
920 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
921 PUTBACK;
922 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
923 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
924 SPAGAIN;
925 FREETMPS;
926 LEAVE;
927 PL_runops = runops_trace;
928 }
929
930 oldcxix = cxstack_ix;
751 } 931 }
752 932
753 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 933 if (cctx->flags & CC_TRACE_LINE)
754 prev->cursp = stacklevel;
755 /* don't add any code here */
756 }
757 else
758 next->cursp = stacklevel;
759 }
760 else if (next->tmps_ix == -2)
761 croak ("tried to transfer to running coroutine");
762 else
763 {
764 LOCK;
765 SAVE (prev, -1); /* first get rid of the old state */
766 UNLOCK;
767
768 if (flags & TRANSFER_SAVE_CCTXT)
769 {
770 if (!prev->stack)
771 allocate_stack (prev, 0);
772
773 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
774 { 934 {
775 PL_top_env = &next->start_env; 935 dSP;
776 936
777 setup_coro (next); 937 PL_runops = RUNOPS_DEFAULT;
778 next->cursp = stacklevel; 938 ENTER;
779 939 SAVETMPS;
780 prev->stack->refcnt++; 940 EXTEND (SP, 3);
781 prev->stack->usecnt++; 941 PL_runops = RUNOPS_DEFAULT;
782 next->stack = prev->stack; 942 PUSHMARK (SP);
783 next->gencnt = prev->gencnt; 943 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
944 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
945 PUTBACK;
946 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
947 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
948 SPAGAIN;
949 FREETMPS;
950 LEAVE;
951 PL_runops = runops_trace;
784 } 952 }
785 else
786 {
787 assert (!next->stack);
788 allocate_stack (next, 1);
789 coro_create (&(next->stack->cctx),
790 setup_coro, (void *)next,
791 next->stack->sptr, labs (next->stack->ssize));
792 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
793 prev->cursp = stacklevel;
794 /* don't add any code here */
795 } 953 }
796 } 954 }
955 }
956 }
957
958 TAINT_NOT;
959 return 0;
960}
961
962/* inject a fake call to Coro::State::_cctx_init into the execution */
963/* _cctx_init should be careful, as it could be called at almost any time */
964/* during execution of a perl program */
965static void NOINLINE
966cctx_prepare (pTHX_ coro_cctx *cctx)
967{
968 dSP;
969 LOGOP myop;
970
971 PL_top_env = &PL_start_env;
972
973 if (cctx->flags & CC_TRACE)
974 PL_runops = runops_trace;
975
976 Zero (&myop, 1, LOGOP);
977 myop.op_next = PL_op;
978 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
979
980 PUSHMARK (SP);
981 EXTEND (SP, 2);
982 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
983 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
984 PUTBACK;
985 PL_op = (OP *)&myop;
986 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
987 SPAGAIN;
988}
989
990/*
991 * this is a _very_ stripped down perl interpreter ;)
992 */
993static void
994cctx_run (void *arg)
995{
996 dTHX;
997
998 /* cctx_run is the alternative tail of transfer(), so unlock here. */
999 UNLOCK;
1000
1001 /* we now skip the entersub that lead to transfer() */
1002 PL_op = PL_op->op_next;
1003
1004 /* inject a fake subroutine call to cctx_init */
1005 cctx_prepare (aTHX_ (coro_cctx *)arg);
1006
1007 /* somebody or something will hit me for both perl_run and PL_restartop */
1008 PL_restartop = PL_op;
1009 perl_run (PL_curinterp);
1010
1011 /*
1012 * If perl-run returns we assume exit() was being called or the coro
1013 * fell off the end, which seems to be the only valid (non-bug)
1014 * reason for perl_run to return. We try to exit by jumping to the
1015 * bootstrap-time "top" top_env, as we cannot restore the "main"
1016 * coroutine as Coro has no such concept
1017 */
1018 PL_top_env = main_top_env;
1019 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1020}
1021
1022static coro_cctx *
1023cctx_new ()
1024{
1025 coro_cctx *cctx;
1026 void *stack_start;
1027 size_t stack_size;
1028
1029 ++cctx_count;
1030
1031 Newz (0, cctx, 1, coro_cctx);
1032
1033#if HAVE_MMAP
1034 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1035 /* mmap supposedly does allocate-on-write for us */
1036 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1037
1038 if (cctx->sptr != (void *)-1)
1039 {
1040# if CORO_STACKGUARD
1041 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1042# endif
1043 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1044 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1045 cctx->flags |= CC_MAPPED;
1046 }
1047 else
1048#endif
1049 {
1050 cctx->ssize = coro_stacksize * (long)sizeof (long);
1051 New (0, cctx->sptr, coro_stacksize, long);
1052
1053 if (!cctx->sptr)
1054 {
1055 perror ("FATAL: unable to allocate stack for coroutine");
1056 _exit (EXIT_FAILURE);
1057 }
1058
1059 stack_start = cctx->sptr;
1060 stack_size = cctx->ssize;
1061 }
1062
1063 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1064 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1065
1066 return cctx;
1067}
1068
1069static void
1070cctx_destroy (coro_cctx *cctx)
1071{
1072 if (!cctx)
1073 return;
1074
1075 --cctx_count;
1076
1077#if CORO_USE_VALGRIND
1078 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1079#endif
1080
1081#if HAVE_MMAP
1082 if (cctx->flags & CC_MAPPED)
1083 munmap (cctx->sptr, cctx->ssize);
1084 else
1085#endif
1086 Safefree (cctx->sptr);
1087
1088 Safefree (cctx);
1089}
1090
1091/* wether this cctx should be destructed */
1092#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1093
1094static coro_cctx *
1095cctx_get (pTHX)
1096{
1097 while (expect_true (cctx_first))
1098 {
1099 coro_cctx *cctx = cctx_first;
1100 cctx_first = cctx->next;
1101 --cctx_idle;
1102
1103 if (expect_true (!CCTX_EXPIRED (cctx)))
1104 return cctx;
1105
1106 cctx_destroy (cctx);
1107 }
1108
1109 return cctx_new ();
1110}
1111
1112static void
1113cctx_put (coro_cctx *cctx)
1114{
1115 /* free another cctx if overlimit */
1116 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1117 {
1118 coro_cctx *first = cctx_first;
1119 cctx_first = first->next;
1120 --cctx_idle;
1121
1122 cctx_destroy (first);
1123 }
1124
1125 ++cctx_idle;
1126 cctx->next = cctx_first;
1127 cctx_first = cctx;
1128}
1129
1130/** coroutine switching *****************************************************/
1131
1132static void
1133transfer_check (pTHX_ struct coro *prev, struct coro *next)
1134{
1135 if (expect_true (prev != next))
1136 {
1137 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1138 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1139
1140 if (expect_false (next->flags & CF_RUNNING))
1141 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1142
1143 if (expect_false (next->flags & CF_DESTROYED))
1144 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1145
1146#if !PERL_VERSION_ATLEAST (5,10,0)
1147 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1148 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1149#endif
1150 }
1151}
1152
1153/* always use the TRANSFER macro */
1154static void NOINLINE
1155transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1156{
1157 dSTACKLEVEL;
1158 static volatile int has_throw;
1159
1160 /* sometimes transfer is only called to set idle_sp */
1161 if (expect_false (!next))
1162 {
1163 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1164 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1165 }
1166 else if (expect_true (prev != next))
1167 {
1168 coro_cctx *prev__cctx;
1169
1170 if (expect_false (prev->flags & CF_NEW))
1171 {
1172 /* create a new empty context */
1173 Newz (0, prev->cctx, 1, coro_cctx);
1174 prev->flags &= ~CF_NEW;
1175 prev->flags |= CF_RUNNING;
1176 }
1177
1178 prev->flags &= ~CF_RUNNING;
1179 next->flags |= CF_RUNNING;
1180
1181 LOCK;
1182
1183 /* first get rid of the old state */
1184 save_perl (aTHX_ prev);
1185
1186 if (expect_false (next->flags & CF_NEW))
1187 {
1188 /* need to start coroutine */
1189 next->flags &= ~CF_NEW;
1190 /* setup coroutine call */
1191 coro_setup (aTHX_ next);
1192 }
797 else 1193 else
1194 load_perl (aTHX_ next);
1195
1196 prev__cctx = prev->cctx;
1197
1198 /* possibly "free" the cctx */
1199 if (expect_true (
1200 prev__cctx->idle_sp == STACKLEVEL
1201 && !(prev__cctx->flags & CC_TRACE)
1202 && !force_cctx
1203 ))
1204 {
1205 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1206 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1207
1208 prev->cctx = 0;
1209
1210 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1211 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1212 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1213 if (!next->cctx)
1214 next->cctx = cctx_get (aTHX);
1215
1216 cctx_put (prev__cctx);
1217 }
1218
1219 ++next->usecount;
1220
1221 if (expect_true (!next->cctx))
1222 next->cctx = cctx_get (aTHX);
1223
1224 has_throw = !!next->throw;
1225
1226 if (expect_false (prev__cctx != next->cctx))
1227 {
1228 prev__cctx->top_env = PL_top_env;
1229 PL_top_env = next->cctx->top_env;
1230 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1231 }
1232
1233 free_coro_mortal (aTHX);
1234 UNLOCK;
1235
1236 if (expect_false (has_throw))
1237 {
1238 struct coro *coro = SvSTATE (coro_current);
1239
1240 if (coro->throw)
798 { 1241 {
1242 SV *exception = coro->throw;
1243 coro->throw = 0;
1244 sv_setsv (ERRSV, exception);
799 setup_coro (next); 1245 croak (0);
800 next->cursp = stacklevel;
801 } 1246 }
802 } 1247 }
803 } 1248 }
1249}
1250
1251struct transfer_args
1252{
1253 struct coro *prev, *next;
1254};
1255
1256#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1257#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1258
1259/** high level stuff ********************************************************/
1260
1261static int
1262coro_state_destroy (pTHX_ struct coro *coro)
1263{
1264 if (coro->flags & CF_DESTROYED)
1265 return 0;
1266
1267 coro->flags |= CF_DESTROYED;
1268
1269 if (coro->flags & CF_READY)
1270 {
1271 /* reduce nready, as destroying a ready coro effectively unreadies it */
1272 /* alternative: look through all ready queues and remove the coro */
1273 LOCK;
1274 --coro_nready;
1275 UNLOCK;
1276 }
1277 else
1278 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1279
1280 if (coro->mainstack && coro->mainstack != main_mainstack)
1281 {
1282 struct coro temp;
1283
1284 if (coro->flags & CF_RUNNING)
1285 croak ("FATAL: tried to destroy currently running coroutine");
1286
1287 save_perl (aTHX_ &temp);
1288 load_perl (aTHX_ coro);
1289
1290 coro_destroy (aTHX_ coro);
1291
1292 load_perl (aTHX_ &temp);
1293
1294 coro->slot = 0;
1295 }
1296
1297 cctx_destroy (coro->cctx);
1298 SvREFCNT_dec (coro->args);
1299
1300 if (coro->next) coro->next->prev = coro->prev;
1301 if (coro->prev) coro->prev->next = coro->next;
1302 if (coro == coro_first) coro_first = coro->next;
1303
1304 return 1;
1305}
1306
1307static int
1308coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1309{
1310 struct coro *coro = (struct coro *)mg->mg_ptr;
1311 mg->mg_ptr = 0;
1312
1313 coro->hv = 0;
1314
1315 if (--coro->refcnt < 0)
1316 {
1317 coro_state_destroy (aTHX_ coro);
1318 Safefree (coro);
1319 }
1320
1321 return 0;
1322}
1323
1324static int
1325coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1326{
1327 struct coro *coro = (struct coro *)mg->mg_ptr;
1328
1329 ++coro->refcnt;
1330
1331 return 0;
1332}
1333
1334static MGVTBL coro_state_vtbl = {
1335 0, 0, 0, 0,
1336 coro_state_free,
1337 0,
1338#ifdef MGf_DUP
1339 coro_state_dup,
1340#else
1341# define MGf_DUP 0
1342#endif
1343};
1344
1345static void
1346prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1347{
1348 ta->prev = SvSTATE (prev_sv);
1349 ta->next = SvSTATE (next_sv);
1350 TRANSFER_CHECK (*ta);
1351}
1352
1353static void
1354api_transfer (SV *prev_sv, SV *next_sv)
1355{
1356 dTHX;
1357 struct transfer_args ta;
1358
1359 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1360 TRANSFER (ta, 1);
1361}
1362
1363/** Coro ********************************************************************/
1364
1365static void
1366coro_enq (pTHX_ SV *coro_sv)
1367{
1368 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1369}
1370
1371static SV *
1372coro_deq (pTHX)
1373{
1374 int prio;
1375
1376 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1377 if (AvFILLp (coro_ready [prio]) >= 0)
1378 return av_shift (coro_ready [prio]);
1379
1380 return 0;
1381}
1382
1383static int
1384api_ready (SV *coro_sv)
1385{
1386 dTHX;
1387 struct coro *coro;
1388 SV *hook;
1389
1390 if (SvROK (coro_sv))
1391 coro_sv = SvRV (coro_sv);
1392
1393 coro = SvSTATE (coro_sv);
1394
1395 if (coro->flags & CF_READY)
1396 return 0;
1397
1398 coro->flags |= CF_READY;
804 1399
805 LOCK; 1400 LOCK;
806 if (coro_mortal) 1401
807 { 1402 hook = coro_nready ? 0 : coro_readyhook;
808 SvREFCNT_dec (coro_mortal); 1403
809 coro_mortal = 0; 1404 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
810 } 1405 ++coro_nready;
1406
811 UNLOCK; 1407 UNLOCK;
812} 1408
1409 if (hook)
1410 {
1411 dSP;
813 1412
814#define SV_CORO(sv,func) \ 1413 ENTER;
815 do { \ 1414 SAVETMPS;
816 if (SvROK (sv)) \
817 sv = SvRV (sv); \
818 \
819 if (SvTYPE (sv) == SVt_PVHV) \
820 { \
821 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
822 \
823 if (!he) \
824 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
825 \
826 (sv) = SvRV (HeVAL(he)); \
827 } \
828 \
829 /* must also be changed inside Coro::Cont::yield */ \
830 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
831 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
832 \
833 } while(0)
834 1415
835#define SvSTATE(sv) (struct coro *)SvIV (sv) 1416 PUSHMARK (SP);
1417 PUTBACK;
1418 call_sv (hook, G_DISCARD);
1419 SPAGAIN;
1420
1421 FREETMPS;
1422 LEAVE;
1423 }
1424
1425 return 1;
1426}
1427
1428static int
1429api_is_ready (SV *coro_sv)
1430{
1431 dTHX;
1432 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1433}
836 1434
837static void 1435static void
838api_transfer(pTHX_ SV *prev, SV *next, int flags) 1436prepare_schedule (pTHX_ struct transfer_args *ta)
839{ 1437{
840 SV_CORO (prev, "Coro::transfer"); 1438 SV *prev_sv, *next_sv;
841 SV_CORO (next, "Coro::transfer");
842 1439
843 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1440 for (;;)
844} 1441 {
1442 LOCK;
1443 next_sv = coro_deq (aTHX);
845 1444
846/** Coro ********************************************************************/ 1445 /* nothing to schedule: call the idle handler */
1446 if (expect_false (!next_sv))
1447 {
1448 dSP;
1449 UNLOCK;
847 1450
848#define PRIO_MAX 3 1451 ENTER;
849#define PRIO_HIGH 1 1452 SAVETMPS;
850#define PRIO_NORMAL 0
851#define PRIO_LOW -1
852#define PRIO_IDLE -3
853#define PRIO_MIN -4
854 1453
855/* for Coro.pm */ 1454 PUSHMARK (SP);
856static GV *coro_current, *coro_idle; 1455 PUTBACK;
857static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 1456 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
858static int coro_nready; 1457 SPAGAIN;
1458
1459 FREETMPS;
1460 LEAVE;
1461 continue;
1462 }
1463
1464 ta->next = SvSTATE (next_sv);
1465
1466 /* cannot transfer to destroyed coros, skip and look for next */
1467 if (expect_false (ta->next->flags & CF_DESTROYED))
1468 {
1469 UNLOCK;
1470 SvREFCNT_dec (next_sv);
1471 /* coro_nready is already taken care of by destroy */
1472 continue;
1473 }
1474
1475 --coro_nready;
1476 UNLOCK;
1477 break;
1478 }
1479
1480 /* free this only after the transfer */
1481 prev_sv = SvRV (coro_current);
1482 ta->prev = SvSTATE (prev_sv);
1483 TRANSFER_CHECK (*ta);
1484 assert (ta->next->flags & CF_READY);
1485 ta->next->flags &= ~CF_READY;
1486 SvRV_set (coro_current, next_sv);
1487
1488 LOCK;
1489 free_coro_mortal (aTHX);
1490 coro_mortal = prev_sv;
1491 UNLOCK;
1492}
859 1493
860static void 1494static void
861coro_enq (pTHX_ SV *sv) 1495prepare_cede (pTHX_ struct transfer_args *ta)
862{ 1496{
863 if (SvTYPE (sv) == SVt_PVHV) 1497 api_ready (coro_current);
864 { 1498 prepare_schedule (aTHX_ ta);
865 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1499}
866 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
867 1500
868 prio = prio > PRIO_MAX ? PRIO_MAX 1501static int
869 : prio < PRIO_MIN ? PRIO_MIN 1502prepare_cede_notself (pTHX_ struct transfer_args *ta)
870 : prio; 1503{
871 1504 if (coro_nready)
872 av_push (coro_ready [prio - PRIO_MIN], sv); 1505 {
873 coro_nready++; 1506 SV *prev = SvRV (coro_current);
874 1507 prepare_schedule (aTHX_ ta);
1508 api_ready (prev);
875 return; 1509 return 1;
876 }
877
878 croak ("Coro::ready tried to enqueue something that is not a coroutine");
879}
880
881static SV *
882coro_deq (pTHX_ int min_prio)
883{
884 int prio = PRIO_MAX - PRIO_MIN;
885
886 min_prio -= PRIO_MIN;
887 if (min_prio < 0)
888 min_prio = 0;
889
890 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891 if (av_len (coro_ready[prio]) >= 0)
892 {
893 coro_nready--;
894 return av_shift (coro_ready[prio]);
895 } 1510 }
896 1511 else
897 return 0; 1512 return 0;
898}
899
900static void
901api_ready (SV *coro)
902{
903 dTHX;
904
905 if (SvROK (coro))
906 coro = SvRV (coro);
907
908 LOCK;
909 coro_enq (aTHX_ SvREFCNT_inc (coro));
910 UNLOCK;
911} 1513}
912 1514
913static void 1515static void
914api_schedule (void) 1516api_schedule (void)
915{ 1517{
916 dTHX; 1518 dTHX;
1519 struct transfer_args ta;
917 1520
918 SV *prev, *next; 1521 prepare_schedule (aTHX_ &ta);
1522 TRANSFER (ta, 1);
1523}
919 1524
920 LOCK; 1525static int
1526api_cede (void)
1527{
1528 dTHX;
1529 struct transfer_args ta;
921 1530
922 prev = SvRV (GvSV (coro_current)); 1531 prepare_cede (aTHX_ &ta);
923 next = coro_deq (aTHX_ PRIO_MIN);
924 1532
925 if (!next) 1533 if (expect_true (ta.prev != ta.next))
926 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1534 {
1535 TRANSFER (ta, 1);
1536 return 1;
1537 }
1538 else
1539 return 0;
1540}
927 1541
928 /* free this only after the transfer */ 1542static int
929 coro_mortal = prev; 1543api_cede_notself (void)
930 SV_CORO (prev, "Coro::schedule"); 1544{
1545 dTHX;
1546 struct transfer_args ta;
931 1547
932 SvRV (GvSV (coro_current)) = next; 1548 if (prepare_cede_notself (aTHX_ &ta))
933 1549 {
934 SV_CORO (next, "Coro::schedule"); 1550 TRANSFER (ta, 1);
935 1551 return 1;
936 UNLOCK; 1552 }
937 1553 else
938 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1554 return 0;
939 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
940} 1555}
941 1556
942static void 1557static void
943api_cede (void) 1558api_trace (SV *coro_sv, int flags)
944{ 1559{
945 dTHX; 1560 dTHX;
1561 struct coro *coro = SvSTATE (coro_sv);
946 1562
947 LOCK; 1563 if (flags & CC_TRACE)
948 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1564 {
949 UNLOCK; 1565 if (!coro->cctx)
1566 coro->cctx = cctx_new ();
1567 else if (!(coro->cctx->flags & CC_TRACE))
1568 croak ("cannot enable tracing on coroutine with custom stack");
950 1569
951 api_schedule (); 1570 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
952} 1571 }
1572 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1573 {
1574 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
953 1575
1576 if (coro->flags & CF_RUNNING)
1577 PL_runops = RUNOPS_DEFAULT;
1578 else
1579 coro->slot->runops = RUNOPS_DEFAULT;
1580 }
1581}
1582
954MODULE = Coro::State PACKAGE = Coro::State 1583MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
955 1584
956PROTOTYPES: ENABLE 1585PROTOTYPES: DISABLE
957 1586
958BOOT: 1587BOOT:
959{ /* {} necessary for stoopid perl-5.6.x */ 1588{
960#ifdef USE_ITHREADS 1589#ifdef USE_ITHREADS
961 MUTEX_INIT (&coro_mutex); 1590 MUTEX_INIT (&coro_mutex);
962#endif 1591#endif
1592 BOOT_PAGESIZE;
963 1593
964 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1594 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
965 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1595 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1596
1597 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1598 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1599 orig_sigelem_set = PL_vtbl_sigelem.svt_set;
1600 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1601
1602 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1603 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1604 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1605
966 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1606 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967 1607
968 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1608 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
969 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1609 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
970 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1610 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
971 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1611 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
972 1612
973 main_mainstack = PL_mainstack; 1613 main_mainstack = PL_mainstack;
1614 main_top_env = PL_top_env;
1615
1616 while (main_top_env->je_prev)
1617 main_top_env = main_top_env->je_prev;
974 1618
975 coroapi.ver = CORO_API_VERSION; 1619 coroapi.ver = CORO_API_VERSION;
1620 coroapi.rev = CORO_API_REVISION;
976 coroapi.transfer = api_transfer; 1621 coroapi.transfer = api_transfer;
977}
978 1622
979Coro::State 1623 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
980_newprocess(args) 1624}
981 SV * args 1625
982 PROTOTYPE: $ 1626SV *
1627new (char *klass, ...)
983 CODE: 1628 CODE:
984 Coro__State coro; 1629{
1630 struct coro *coro;
1631 MAGIC *mg;
1632 HV *hv;
1633 int i;
985 1634
986 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
987 croak ("Coro::State::_newprocess expects an arrayref");
988
989 Newz (0, coro, 1, struct coro); 1635 Newz (0, coro, 1, struct coro);
1636 coro->args = newAV ();
1637 coro->flags = CF_NEW;
990 1638
991 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1639 if (coro_first) coro_first->prev = coro;
992 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1640 coro->next = coro_first;
993 /*coro->stack = 0;*/ 1641 coro_first = coro;
994 1642
995 /* same as JMPENV_BOOTSTRAP */ 1643 coro->hv = hv = newHV ();
996 /* we might be able to recycle start_env, but safe is safe */ 1644 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
997 /*Zero(&coro->start_env, 1, JMPENV);*/ 1645 mg->mg_flags |= MGf_DUP;
998 coro->start_env.je_ret = -1; 1646 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
999 coro->start_env.je_mustcatch = TRUE;
1000 1647
1001 RETVAL = coro; 1648 av_extend (coro->args, items - 1);
1649 for (i = 1; i < items; i++)
1650 av_push (coro->args, newSVsv (ST (i)));
1651}
1002 OUTPUT: 1652 OUTPUT:
1003 RETVAL 1653 RETVAL
1004 1654
1655# these not obviously related functions are all rolled into the same xs
1656# function to increase chances that they all will call transfer with the same
1657# stack offset
1005void 1658void
1006transfer(prev, next, flags) 1659_set_stacklevel (...)
1007 SV *prev 1660 ALIAS:
1008 SV *next 1661 Coro::State::transfer = 1
1009 int flags 1662 Coro::schedule = 2
1010 PROTOTYPE: @ 1663 Coro::cede = 3
1664 Coro::cede_notself = 4
1011 CODE: 1665 CODE:
1666{
1667 struct transfer_args ta;
1668
1012 PUTBACK; 1669 PUTBACK;
1013 SV_CORO (next, "Coro::transfer"); 1670 switch (ix)
1014 SV_CORO (prev, "Coro::transfer"); 1671 {
1015 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1672 case 0:
1673 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1674 ta.next = 0;
1675 break;
1676
1677 case 1:
1678 if (items != 2)
1679 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1680
1681 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1682 break;
1683
1684 case 2:
1685 prepare_schedule (aTHX_ &ta);
1686 break;
1687
1688 case 3:
1689 prepare_cede (aTHX_ &ta);
1690 break;
1691
1692 case 4:
1693 if (!prepare_cede_notself (aTHX_ &ta))
1694 XSRETURN_EMPTY;
1695
1696 break;
1697 }
1016 SPAGAIN; 1698 SPAGAIN;
1017 1699
1700 BARRIER;
1701 PUTBACK;
1702 TRANSFER (ta, 0);
1703 SPAGAIN; /* might be the sp of a different coroutine now */
1704 /* be extra careful not to ever do anything after TRANSFER */
1705}
1706
1707bool
1708_destroy (SV *coro_sv)
1709 CODE:
1710 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1711 OUTPUT:
1712 RETVAL
1713
1018void 1714void
1019DESTROY(coro)
1020 Coro::State coro
1021 CODE:
1022
1023 if (coro->mainstack && coro->mainstack != main_mainstack)
1024 {
1025 struct coro temp;
1026
1027 PUTBACK;
1028 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1029 LOAD (aTHX_ coro);
1030 SPAGAIN;
1031
1032 destroy_stacks (aTHX);
1033
1034 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1035 SPAGAIN;
1036
1037 coro->mainstack = 0;
1038 }
1039
1040 deallocate_stack (coro);
1041 SvREFCNT_dec (coro->args);
1042 Safefree (coro);
1043
1044void
1045_exit(code) 1715_exit (int code)
1046 int code
1047 PROTOTYPE: $ 1716 PROTOTYPE: $
1048 CODE: 1717 CODE:
1049 _exit (code); 1718 _exit (code);
1050 1719
1051MODULE = Coro::State PACKAGE = Coro::Cont 1720int
1721cctx_stacksize (int new_stacksize = 0)
1722 CODE:
1723 RETVAL = coro_stacksize;
1724 if (new_stacksize)
1725 coro_stacksize = new_stacksize;
1726 OUTPUT:
1727 RETVAL
1052 1728
1053# this is slightly dirty (should expose a c-level api) 1729int
1730cctx_count ()
1731 CODE:
1732 RETVAL = cctx_count;
1733 OUTPUT:
1734 RETVAL
1735
1736int
1737cctx_idle ()
1738 CODE:
1739 RETVAL = cctx_idle;
1740 OUTPUT:
1741 RETVAL
1054 1742
1055void 1743void
1056yield(...) 1744list ()
1057 PROTOTYPE: @ 1745 PPCODE:
1746{
1747 struct coro *coro;
1748 for (coro = coro_first; coro; coro = coro->next)
1749 if (coro->hv)
1750 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1751}
1752
1753void
1754call (Coro::State coro, SV *coderef)
1755 ALIAS:
1756 eval = 1
1757 CODE:
1758{
1759 if (coro->mainstack)
1760 {
1761 struct coro temp;
1762
1763 if (!(coro->flags & CF_RUNNING))
1764 {
1765 PUTBACK;
1766 save_perl (aTHX_ &temp);
1767 load_perl (aTHX_ coro);
1768 }
1769
1770 {
1771 dSP;
1772 ENTER;
1773 SAVETMPS;
1774 PUTBACK;
1775 PUSHSTACK;
1776 PUSHMARK (SP);
1777
1778 if (ix)
1779 eval_sv (coderef, 0);
1780 else
1781 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1782
1783 POPSTACK;
1784 SPAGAIN;
1785 FREETMPS;
1786 LEAVE;
1787 PUTBACK;
1788 }
1789
1790 if (!(coro->flags & CF_RUNNING))
1791 {
1792 save_perl (aTHX_ coro);
1793 load_perl (aTHX_ &temp);
1794 SPAGAIN;
1795 }
1796 }
1797}
1798
1799SV *
1800is_ready (Coro::State coro)
1801 PROTOTYPE: $
1802 ALIAS:
1803 is_ready = CF_READY
1804 is_running = CF_RUNNING
1805 is_new = CF_NEW
1806 is_destroyed = CF_DESTROYED
1807 CODE:
1808 RETVAL = boolSV (coro->flags & ix);
1809 OUTPUT:
1810 RETVAL
1811
1812void
1813api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1814
1815SV *
1816has_cctx (Coro::State coro)
1817 PROTOTYPE: $
1818 CODE:
1819 RETVAL = boolSV (!!coro->cctx);
1820 OUTPUT:
1821 RETVAL
1822
1823int
1824is_traced (Coro::State coro)
1825 PROTOTYPE: $
1826 CODE:
1827 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1828 OUTPUT:
1829 RETVAL
1830
1831IV
1832rss (Coro::State coro)
1833 PROTOTYPE: $
1834 ALIAS:
1835 usecount = 1
1058 CODE: 1836 CODE:
1059 SV *yieldstack; 1837 switch (ix)
1060 SV *sv; 1838 {
1061 AV *defav = GvAV (PL_defgv); 1839 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1062 struct coro *prev, *next; 1840 case 1: RETVAL = coro->usecount; break;
1063
1064 yieldstack = *hv_fetch (
1065 (HV *)SvRV (GvSV (coro_current)),
1066 "yieldstack", sizeof ("yieldstack") - 1,
1067 0 1841 }
1068 ); 1842 OUTPUT:
1843 RETVAL
1069 1844
1070 /* set up @_ -- ugly */ 1845void
1071 av_clear (defav); 1846force_cctx ()
1072 av_fill (defav, items - 1); 1847 CODE:
1073 while (items--) 1848 struct coro *coro = SvSTATE (coro_current);
1074 av_store (defav, items, SvREFCNT_inc (ST(items))); 1849 coro->cctx->idle_sp = 0;
1075
1076 sv = av_pop ((AV *)SvRV (yieldstack));
1077 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1078 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1079 SvREFCNT_dec (sv);
1080
1081 transfer (aTHX_ prev, next, 0);
1082 1850
1083MODULE = Coro::State PACKAGE = Coro 1851MODULE = Coro::State PACKAGE = Coro
1084 1852
1085# this is slightly dirty (should expose a c-level api)
1086
1087BOOT: 1853BOOT:
1088{ 1854{
1089 int i; 1855 int i;
1856
1857 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1858 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1859 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1860
1861 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1862 SvREADONLY_on (coro_current);
1863
1090 HV *stash = gv_stashpv ("Coro", TRUE); 1864 coro_stash = gv_stashpv ("Coro", TRUE);
1091 1865
1092 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1866 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1093 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1867 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1094 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1868 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1095 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1869 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1096 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1870 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1097 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1871 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1098
1099 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1100 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1101 1872
1102 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1873 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1103 coro_ready[i] = newAV (); 1874 coro_ready[i] = newAV ();
1104 1875
1105 { 1876 {
1106 SV *sv = perl_get_sv("Coro::API", 1); 1877 SV *sv = perl_get_sv ("Coro::API", TRUE);
1878 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1107 1879
1108 coroapi.schedule = api_schedule; 1880 coroapi.schedule = api_schedule;
1109 coroapi.cede = api_cede; 1881 coroapi.cede = api_cede;
1882 coroapi.cede_notself = api_cede_notself;
1110 coroapi.ready = api_ready; 1883 coroapi.ready = api_ready;
1884 coroapi.is_ready = api_is_ready;
1111 coroapi.nready = &coro_nready; 1885 coroapi.nready = &coro_nready;
1112 coroapi.current = coro_current; 1886 coroapi.current = coro_current;
1113 1887
1114 GCoroAPI = &coroapi; 1888 GCoroAPI = &coroapi;
1115 sv_setiv(sv, (IV)&coroapi); 1889 sv_setiv (sv, (IV)&coroapi);
1116 SvREADONLY_on(sv); 1890 SvREADONLY_on (sv);
1117 } 1891 }
1118} 1892}
1119 1893
1120#if !PERL_MICRO
1121
1122void 1894void
1123ready(self) 1895_set_current (SV *current)
1124 SV * self
1125 PROTOTYPE: $ 1896 PROTOTYPE: $
1126 CODE: 1897 CODE:
1127 api_ready (self); 1898 SvREFCNT_dec (SvRV (coro_current));
1899 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1128 1900
1129#endif 1901void
1902_set_readyhook (SV *hook)
1903 PROTOTYPE: $
1904 CODE:
1905 LOCK;
1906 SvREFCNT_dec (coro_readyhook);
1907 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1908 UNLOCK;
1130 1909
1131int 1910int
1911prio (Coro::State coro, int newprio = 0)
1912 ALIAS:
1913 nice = 1
1914 CODE:
1915{
1916 RETVAL = coro->prio;
1917
1918 if (items > 1)
1919 {
1920 if (ix)
1921 newprio = coro->prio - newprio;
1922
1923 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1924 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1925
1926 coro->prio = newprio;
1927 }
1928}
1929 OUTPUT:
1930 RETVAL
1931
1932SV *
1933ready (SV *self)
1934 PROTOTYPE: $
1935 CODE:
1936 RETVAL = boolSV (api_ready (self));
1937 OUTPUT:
1938 RETVAL
1939
1940int
1132nready(...) 1941nready (...)
1133 PROTOTYPE: 1942 PROTOTYPE:
1134 CODE: 1943 CODE:
1135 RETVAL = coro_nready; 1944 RETVAL = coro_nready;
1136 OUTPUT: 1945 OUTPUT:
1137 RETVAL 1946 RETVAL
1138 1947
1139void 1948void
1140schedule(...) 1949throw (Coro::State self, SV *throw = &PL_sv_undef)
1950 PROTOTYPE: $;$
1951 CODE:
1952 SvREFCNT_dec (self->throw);
1953 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1954
1955void
1956swap_defsv (Coro::State self)
1141 PROTOTYPE: 1957 PROTOTYPE: $
1958 ALIAS:
1959 swap_defav = 1
1960 CODE:
1961 if (!self->slot)
1962 croak ("cannot swap state with coroutine that has no saved state");
1963 else
1964 {
1965 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1966 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1967
1968 SV *tmp = *src; *src = *dst; *dst = tmp;
1969 }
1970
1971# for async_pool speedup
1972void
1973_pool_1 (SV *cb)
1142 CODE: 1974 CODE:
1143 api_schedule (); 1975{
1976 struct coro *coro = SvSTATE (coro_current);
1977 HV *hv = (HV *)SvRV (coro_current);
1978 AV *defav = GvAV (PL_defgv);
1979 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1980 AV *invoke_av;
1981 int i, len;
1982
1983 if (!invoke)
1984 {
1985 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1986 croak ("\3async_pool terminate\2\n");
1987 }
1988
1989 SvREFCNT_dec (coro->saved_deffh);
1990 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1991
1992 hv_store (hv, "desc", sizeof ("desc") - 1,
1993 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1994
1995 invoke_av = (AV *)SvRV (invoke);
1996 len = av_len (invoke_av);
1997
1998 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1999
2000 if (len > 0)
2001 {
2002 av_fill (defav, len - 1);
2003 for (i = 0; i < len; ++i)
2004 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2005 }
2006
2007 SvREFCNT_dec (invoke);
2008}
1144 2009
1145void 2010void
1146cede(...) 2011_pool_2 (SV *cb)
1147 PROTOTYPE:
1148 CODE: 2012 CODE:
2013{
2014 struct coro *coro = SvSTATE (coro_current);
2015
2016 sv_setsv (cb, &PL_sv_undef);
2017
2018 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2019 coro->saved_deffh = 0;
2020
2021 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2022 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2023 {
2024 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
2025 croak ("\3async_pool terminate\2\n");
2026 }
2027
2028 av_clear (GvAV (PL_defgv));
2029 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2030 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2031
2032 coro->prio = 0;
2033
2034 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2035 api_trace (coro_current, 0);
2036
2037 av_push (av_async_pool, newSVsv (coro_current));
2038}
2039
2040
2041MODULE = Coro::State PACKAGE = Coro::AIO
2042
2043SV *
2044_get_state ()
2045 CODE:
2046{
2047 struct io_state *data;
2048
2049 RETVAL = newSV (sizeof (struct io_state));
2050 data = (struct io_state *)SvPVX (RETVAL);
2051 SvCUR_set (RETVAL, sizeof (struct io_state));
2052 SvPOK_only (RETVAL);
2053
2054 data->errorno = errno;
2055 data->laststype = PL_laststype;
2056 data->laststatval = PL_laststatval;
2057 data->statcache = PL_statcache;
2058}
2059 OUTPUT:
2060 RETVAL
2061
2062void
2063_set_state (char *data_)
2064 PROTOTYPE: $
2065 CODE:
2066{
2067 struct io_state *data = (void *)data_;
2068
2069 errno = data->errorno;
2070 PL_laststype = data->laststype;
2071 PL_laststatval = data->laststatval;
2072 PL_statcache = data->statcache;
2073}
2074
2075
2076MODULE = Coro::State PACKAGE = Coro::AnyEvent
2077
2078BOOT:
2079 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2080
2081SV *
2082_schedule ()
2083 PROTOTYPE: @
2084 CODE:
2085{
2086 static int incede;
2087
1149 api_cede (); 2088 api_cede_notself ();
1150 2089
2090 ++incede;
2091 while (coro_nready >= incede && api_cede ())
2092 ;
2093
2094 sv_setsv (sv_activity, &PL_sv_undef);
2095 if (coro_nready >= incede)
2096 {
2097 PUSHMARK (SP);
2098 PUTBACK;
2099 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2100 SPAGAIN;
2101 }
2102
2103 --incede;
2104}
2105

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