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Comparing Coro/Coro/State.xs (file contents):
Revision 1.78 by root, Wed Nov 1 01:21:21 2006 UTC vs.
Revision 1.242 by root, Thu Aug 14 12:48:20 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 <errno.h> 85/* 5.8.8 */
86#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0
88#endif
89#ifndef newSV
90# define newSV(l) NEWSV(0,l)
91#endif
92
93/* 5.11 */
94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
97
98/* 5.8.7 */
99#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v)
101#endif
33 102
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 103#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 104# undef CORO_STACKGUARD
36#endif
37
38#ifndef STACKGUARD
39# define STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif
51# endif 105#endif
52# include <limits.h> 106
53# ifndef PAGESIZE 107#ifndef CORO_STACKGUARD
54# define PAGESIZE pagesize 108# define CORO_STACKGUARD 0
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif 109#endif
60#endif
61 110
62#define SUB_INIT "Coro::State::initialize" 111/* prefer perl internal functions over our own? */
63#define UCORO_STATE "_coro_state" 112#ifndef CORO_PREFER_PERL_FUNCTIONS
113# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif
64 115
65/* The next macro should declare a variable stacklevel that contains and approximation 116/* The next macros try to return the current stack pointer, in an as
66 * to the current C stack pointer. Its property is that it changes with each call 117 * portable way as possible. */
67 * and should be unique. */ 118#define dSTACKLEVEL volatile char stacklevel
68#define dSTACKLEVEL void *stacklevel = &stacklevel 119#define STACKLEVEL ((void *)&stacklevel)
69 120
70#define IN_DESTRUCT (PL_main_cv == Nullcv) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
71 122
72#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))
73 137
74#include "CoroAPI.h" 138#include "CoroAPI.h"
75 139
76#ifdef USE_ITHREADS 140#ifdef USE_ITHREADS
77static perl_mutex coro_mutex; 141static perl_mutex coro_mutex;
… …
80#else 144#else
81# define LOCK (void)0 145# define LOCK (void)0
82# define UNLOCK (void)0 146# define UNLOCK (void)0
83#endif 147#endif
84 148
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;
85static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
86static 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;
87static HV *coro_state_stash; 162static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 163static volatile SV *coro_mortal; /* will be freed after next transfer */
91 164
92/* 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 */
93typedef struct { 219typedef struct {
94 int refcnt; /* pointer reference counter */ 220 SV *defsv;
95 int usecnt; /* shared by how many coroutines */ 221 AV *defav;
96 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;
97 228
98 coro_context cctx; 229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
99 230
100 void *sptr; 231/* this is a structure representing a perl-level coroutine */
101 long ssize; /* positive == mmap, otherwise malloc */
102} coro_stack;
103
104struct coro { 232struct coro {
105 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 233 /* the c coroutine allocated to this perl coroutine, if any */
106 JMPENV start_env; 234 coro_cctx *cctx;
107 235
108 /* the optional C context */ 236 /* process data */
109 coro_stack *stack;
110 void *cursp;
111 int gencnt;
112
113 /* optionally saved, might be zero */
114 AV *defav;
115 SV *defsv;
116 SV *errsv;
117
118 /* saved global state not related to stacks */
119 U8 dowarn;
120 I32 in_eval;
121
122 /* the stacks and related info (callchain etc..) */
123 PERL_SI *curstackinfo;
124 AV *curstack;
125 AV *mainstack; 237 AV *mainstack;
126 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
127 OP *op;
128 SV **curpad;
129 AV *comppad;
130 CV *compcv;
131 SV **stack_base;
132 SV **stack_max;
133 SV **tmps_stack;
134 I32 tmps_floor;
135 I32 tmps_ix;
136 I32 tmps_max;
137 I32 *markstack;
138 I32 *markstack_ptr;
139 I32 *markstack_max;
140 I32 *scopestack;
141 I32 scopestack_ix;
142 I32 scopestack_max;
143 ANY *savestack;
144 I32 savestack_ix;
145 I32 savestack_max;
146 OP **retstack;
147 I32 retstack_ix;
148 I32 retstack_max;
149 PMOP *curpm;
150 COP *curcop;
151 JMPENV *top_env;
152 239
153 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
154 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;
155}; 257};
156 258
157typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
158typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
159 261
262/** Coro ********************************************************************/
263
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)
282{
283#if PERL_VERSION_ATLEAST (5,10,0)
284 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
285 get_sv (name, create);
286#endif
287 return get_sv (name, create);
288}
289
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
160static AV * 310static AV *
161coro_clone_padlist (pTHX_ CV *cv) 311coro_clone_padlist (pTHX_ CV *cv)
162{ 312{
163 AV *padlist = CvPADLIST (cv); 313 AV *padlist = CvPADLIST (cv);
164 AV *newpadlist, *newpad; 314 AV *newpadlist, *newpad;
165 315
166 newpadlist = newAV (); 316 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
318#if PERL_VERSION_ATLEAST (5,10,0)
319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
320#else
168 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist); 324 --AvFILLp (padlist);
171 325
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
173 av_store (newpadlist, 1, (SV *)newpad); 327 av_store (newpadlist, 1, (SV *)newpad);
… …
207 361
208 /* casting is fun. */ 362 /* casting is fun. */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210 free_padlist (aTHX_ padlist); 364 free_padlist (aTHX_ padlist);
211 365
212 SvREFCNT_dec (av);
213
214 return 0; 366 return 0;
215} 367}
216 368
217#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
218 371
219static 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))
220 412
221/* the next two functions merely cache the padlists */ 413/* the next two functions merely cache the padlists */
222static void 414static void
223get_padlist (pTHX_ CV *cv) 415get_padlist (pTHX_ CV *cv)
224{ 416{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 417 MAGIC *mg = CORO_MAGIC_cv (cv);
418 AV *av;
226 419
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229 else 422 else
230 { 423 {
231#if 0 424#if CORO_PREFER_PERL_FUNCTIONS
232 /* this should work - but it doesn't :( */ 425 /* this is probably cleaner, but also slower? */
233 CV *cp = Perl_cv_clone (aTHX_ cv); 426 CV *cp = Perl_cv_clone (cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 427 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 428 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 429 SvREFCNT_dec (cp);
237#else 430#else
238 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
241} 434}
242 435
243static void 436static void
244put_padlist (pTHX_ CV *cv) 437put_padlist (pTHX_ CV *cv)
245{ 438{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 439 MAGIC *mg = CORO_MAGIC_cv (cv);
440 AV *av;
247 441
248 if (!mg) 442 if (expect_false (!mg))
249 { 443 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV ();
254 }
255 444
256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 445 av = (AV *)mg->mg_obj;
257}
258 446
259#define SB do { 447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
260#define SE } while (0) 448 av_extend (av, AvMAX (av) + 1);
261 449
262#define LOAD(state) load_state(aTHX_ (state)); 450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 451}
264 452
265#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 453/** load & save, init *******************************************************/
266 454
267static void 455static void
268load_state(pTHX_ Coro__State c) 456load_perl (pTHX_ Coro__State c)
269{ 457{
270 PL_dowarn = c->dowarn; 458 perl_slots *slot = c->slot;
271 PL_in_eval = c->in_eval; 459 c->slot = 0;
272 460
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack; 461 PL_mainstack = c->mainstack;
276 PL_stack_sp = c->stack_sp;
277 PL_op = c->op;
278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
281 PL_stack_base = c->stack_base;
282 PL_stack_max = c->stack_max;
283 PL_tmps_stack = c->tmps_stack;
284 PL_tmps_floor = c->tmps_floor;
285 PL_tmps_ix = c->tmps_ix;
286 PL_tmps_max = c->tmps_max;
287 PL_markstack = c->markstack;
288 PL_markstack_ptr = c->markstack_ptr;
289 PL_markstack_max = c->markstack_max;
290 PL_scopestack = c->scopestack;
291 PL_scopestack_ix = c->scopestack_ix;
292 PL_scopestack_max = c->scopestack_max;
293 PL_savestack = c->savestack;
294 PL_savestack_ix = c->savestack_ix;
295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
297 PL_retstack = c->retstack;
298 PL_retstack_ix = c->retstack_ix;
299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
302 PL_curcop = c->curcop;
303 PL_top_env = c->top_env;
304 462
305 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 463 GvSV (PL_defgv) = slot->defsv;
306 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 464 GvAV (PL_defgv) = slot->defav;
307 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
308 471
309 { 472 {
310 dSP; 473 dSP;
474
311 CV *cv; 475 CV *cv;
312 476
313 /* now do the ugly restore mess */ 477 /* now do the ugly restore mess */
314 while ((cv = (CV *)POPs)) 478 while (expect_true (cv = (CV *)POPs))
315 { 479 {
316 AV *padlist = (AV *)POPs;
317
318 if (padlist)
319 {
320 put_padlist (aTHX_ cv); /* mark this padlist as available */ 480 put_padlist (aTHX_ cv); /* mark this padlist as available */
321 CvPADLIST(cv) = padlist; 481 CvDEPTH (cv) = PTR2IV (POPs);
322 } 482 CvPADLIST (cv) = (AV *)POPs;
323
324 ++CvDEPTH(cv);
325 } 483 }
326 484
327 PUTBACK; 485 PUTBACK;
328 } 486 }
329} 487}
330 488
331static void 489static void
332save_state(pTHX_ Coro__State c, int flags) 490save_perl (pTHX_ Coro__State c)
333{ 491{
334 { 492 {
335 dSP; 493 dSP;
336 I32 cxix = cxstack_ix; 494 I32 cxix = cxstack_ix;
337 PERL_CONTEXT *ccstk = cxstack; 495 PERL_CONTEXT *ccstk = cxstack;
… …
340 /* 498 /*
341 * 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
342 * (and reinitialize) all cv's in the whole callchain :( 500 * (and reinitialize) all cv's in the whole callchain :(
343 */ 501 */
344 502
345 PUSHs (Nullsv); 503 XPUSHs (Nullsv);
346 /* this loop was inspired by pp_caller */ 504 /* this loop was inspired by pp_caller */
347 for (;;) 505 for (;;)
348 { 506 {
349 while (cxix >= 0) 507 while (expect_true (cxix >= 0))
350 { 508 {
351 PERL_CONTEXT *cx = &ccstk[cxix--]; 509 PERL_CONTEXT *cx = &ccstk[cxix--];
352 510
353 if (CxTYPE(cx) == CXt_SUB) 511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
354 { 512 {
355 CV *cv = cx->blk_sub.cv; 513 CV *cv = cx->blk_sub.cv;
514
356 if (CvDEPTH(cv)) 515 if (expect_true (CvDEPTH (cv)))
357 { 516 {
358 EXTEND (SP, CvDEPTH(cv)*2); 517 EXTEND (SP, 3);
359
360 while (--CvDEPTH(cv))
361 {
362 /* this tells the restore code to increment CvDEPTH */
363 PUSHs (Nullsv);
364 PUSHs ((SV *)cv);
365 }
366
367 PUSHs ((SV *)CvPADLIST(cv)); 518 PUSHs ((SV *)CvPADLIST (cv));
519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
368 PUSHs ((SV *)cv); 520 PUSHs ((SV *)cv);
369 521
522 CvDEPTH (cv) = 0;
370 get_padlist (aTHX_ cv); 523 get_padlist (aTHX_ cv);
371 } 524 }
372 } 525 }
373#ifdef CXt_FORMAT
374 else if (CxTYPE(cx) == CXt_FORMAT)
375 {
376 /* I never used formats, so how should I know how these are implemented? */
377 /* my bold guess is as a simple, plain sub... */
378 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
379 }
380#endif
381 } 526 }
382 527
383 if (top_si->si_type == PERLSI_MAIN) 528 if (expect_true (top_si->si_type == PERLSI_MAIN))
384 break; 529 break;
385 530
386 top_si = top_si->si_prev; 531 top_si = top_si->si_prev;
387 ccstk = top_si->si_cxstack; 532 ccstk = top_si->si_cxstack;
388 cxix = top_si->si_cxix; 533 cxix = top_si->si_cxix;
389 } 534 }
390 535
391 PUTBACK; 536 PUTBACK;
392 } 537 }
393 538
394 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 539 /* allocate some space on the context stack for our purposes */
395 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 540 /* we manually unroll here, as usually 2 slots is enough */
396 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 */
397 550
398 c->dowarn = PL_dowarn;
399 c->in_eval = PL_in_eval;
400
401 c->curstackinfo = PL_curstackinfo;
402 c->curstack = PL_curstack;
403 c->mainstack = PL_mainstack; 551 c->mainstack = PL_mainstack;
404 c->stack_sp = PL_stack_sp; 552
405 c->op = PL_op; 553 {
406 c->curpad = PL_curpad; 554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
407 c->comppad = PL_comppad; 555
408 c->compcv = PL_compcv; 556 slot->defav = GvAV (PL_defgv);
409 c->stack_base = PL_stack_base; 557 slot->defsv = DEFSV;
410 c->stack_max = PL_stack_max; 558 slot->errsv = ERRSV;
411 c->tmps_stack = PL_tmps_stack; 559 slot->irsgv = GvSV (irsgv);
412 c->tmps_floor = PL_tmps_floor; 560
413 c->tmps_ix = PL_tmps_ix; 561 #define VAR(name,type) slot->name = PL_ ## name;
414 c->tmps_max = PL_tmps_max; 562 # include "state.h"
415 c->markstack = PL_markstack; 563 #undef VAR
416 c->markstack_ptr = PL_markstack_ptr; 564 }
417 c->markstack_max = PL_markstack_max;
418 c->scopestack = PL_scopestack;
419 c->scopestack_ix = PL_scopestack_ix;
420 c->scopestack_max = PL_scopestack_max;
421 c->savestack = PL_savestack;
422 c->savestack_ix = PL_savestack_ix;
423 c->savestack_max = PL_savestack_max;
424#if PERL_VERSION < 9
425 c->retstack = PL_retstack;
426 c->retstack_ix = PL_retstack_ix;
427 c->retstack_max = PL_retstack_max;
428#endif
429 c->curpm = PL_curpm;
430 c->curcop = PL_curcop;
431 c->top_env = PL_top_env;
432} 565}
433 566
434/* 567/*
435 * allocate various perl stacks. This is an exact copy 568 * allocate various perl stacks. This is an exact copy
436 * of perl.c:init_stacks, except that it uses less memory 569 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do 570 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace. 571 * not usually need a lot of stackspace.
439 */ 572 */
573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
440static void 576static void
441coro_init_stacks (pTHX) 577coro_init_stacks (pTHX)
442{ 578{
443 LOCK; 579 PL_curstackinfo = new_stackinfo(32, 8);
444
445 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446 PL_curstackinfo->si_type = PERLSI_MAIN; 580 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 581 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 583
450 PL_stack_base = AvARRAY(PL_curstack); 584 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 585 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 587
454 New(50,PL_tmps_stack,96,SV*); 588 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 589 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 590 PL_tmps_ix = -1;
457 PL_tmps_max = 96; 591 PL_tmps_max = 32;
458 592
459 New(54,PL_markstack,16,I32); 593 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 594 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16; 595 PL_markstack_max = PL_markstack + 16;
462 596
463#ifdef SET_MARK_OFFSET 597#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 598 SET_MARK_OFFSET;
465#endif 599#endif
466 600
467 New(54,PL_scopestack,16,I32); 601 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 602 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16; 603 PL_scopestack_max = 8;
470 604
471 New(54,PL_savestack,96,ANY); 605 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 606 PL_savestack_ix = 0;
473 PL_savestack_max = 96; 607 PL_savestack_max = 24;
474 608
475#if PERL_VERSION < 9 609#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,8,OP*); 610 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 611 PL_retstack_ix = 0;
478 PL_retstack_max = 8; 612 PL_retstack_max = 4;
479#endif 613#endif
480
481 UNLOCK;
482} 614}
615#endif
483 616
484/* 617/*
485 * destroy the stacks, the callchain etc... 618 * destroy the stacks, the callchain etc...
486 */ 619 */
487static void 620static void
488destroy_stacks(pTHX) 621coro_destroy_stacks (pTHX)
489{ 622{
490 if (!IN_DESTRUCT)
491 {
492 /* is this ugly, I ask? */
493 LEAVE_SCOPE (0);
494
495 /* sure it is, but more important: is it correct?? :/ */
496 FREETMPS;
497
498 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499 }
500
501 while (PL_curstackinfo->si_next) 623 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 624 PL_curstackinfo = PL_curstackinfo->si_next;
503 625
504 while (PL_curstackinfo) 626 while (PL_curstackinfo)
505 { 627 {
506 PERL_SI *p = PL_curstackinfo->si_prev; 628 PERL_SI *p = PL_curstackinfo->si_prev;
507 629
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT) 630 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack); 631 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519 632
520 Safefree (PL_curstackinfo->si_cxstack); 633 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo); 634 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p; 635 PL_curstackinfo = p;
523 } 636 }
524 637
525 Safefree (PL_tmps_stack); 638 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 639 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 640 Safefree (PL_scopestack);
528 Safefree (PL_savestack); 641 Safefree (PL_savestack);
529#if PERL_VERSION < 9 642#if !PERL_VERSION_ATLEAST (5,10,0)
530 Safefree (PL_retstack); 643 Safefree (PL_retstack);
531#endif 644#endif
532} 645}
533 646
534static void 647static size_t
535allocate_stack (Coro__State ctx, int alloc) 648coro_rss (pTHX_ struct coro *coro)
536{ 649{
537 coro_stack *stack; 650 size_t rss = sizeof (*coro);
538 651
539 New (0, stack, 1, coro_stack); 652 if (coro->mainstack)
540
541 stack->refcnt = 1;
542 stack->usecnt = 1;
543 stack->gencnt = ctx->gencnt = 0;
544
545 if (alloc)
546 { 653 {
547#if HAVE_MMAP 654 perl_slots tmp_slot;
548 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 655 perl_slots *slot;
549 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 656
550 if (stack->sptr != (void *)-1) 657 if (coro->flags & CF_RUNNING)
551 { 658 {
552# if STACKGUARD 659 slot = &tmp_slot;
553 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 660
554# endif 661 #define VAR(name,type) slot->name = PL_ ## name;
662 # include "state.h"
663 #undef VAR
555 } 664 }
556 else 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 *);
557#endif 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);
688static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
689
690/* apparently < 5.8.8 */
691#ifndef MgPV_nolen_const
692#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
693 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
694 (const char*)(mg)->mg_ptr)
695#endif
696
697/*
698 * This overrides the default magic get method of %SIG elements.
699 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
700 * and instead of tryign to save and restore the hash elements, we just provide
701 * readback here.
702 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
703 * not expecting this to actually change the hook. This is a potential problem
704 * when a schedule happens then, but we ignore this.
705 */
706static int
707coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
708{
709 const char *s = MgPV_nolen_const (mg);
710
711 if (*s == '_')
712 {
713 SV **svp = 0;
714
715 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
716 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
717
718 if (svp)
558 { 719 {
559 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 720 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
560 New (0, stack->sptr, STACKSIZE, long); 721 return 0;
561 } 722 }
562 } 723 }
563 else
564 stack->sptr = 0;
565 724
566 ctx->stack = stack; 725 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
726}
727
728static int
729coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
730{
731 const char *s = MgPV_nolen_const (mg);
732
733 if (*s == '_')
734 {
735 SV **svp = 0;
736
737 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
738 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
739
740 if (svp)
741 {
742 SV *old = *svp;
743 *svp = 0;
744 SvREFCNT_dec (old);
745 return 0;
746 }
747 }
748
749 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
750}
751
752static int
753coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
754{
755 const char *s = MgPV_nolen_const (mg);
756
757 if (*s == '_')
758 {
759 SV **svp = 0;
760
761 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
762 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
763
764 if (svp)
765 {
766 SV *old = *svp;
767 *svp = newSVsv (sv);
768 SvREFCNT_dec (old);
769 return 0;
770 }
771 }
772
773 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
567} 774}
568 775
569static void 776static void
570deallocate_stack (Coro__State ctx) 777coro_setup (pTHX_ struct coro *coro)
571{
572 coro_stack *stack = ctx->stack;
573
574 ctx->stack = 0;
575
576 if (stack)
577 {
578 if (!--stack->refcnt)
579 {
580#ifdef HAVE_MMAP
581 if (stack->ssize > 0 && stack->sptr)
582 munmap (stack->sptr, stack->ssize);
583 else
584#endif
585 Safefree (stack->sptr);
586
587 Safefree (stack);
588 }
589 else if (ctx->gencnt == stack->gencnt)
590 --stack->usecnt;
591 }
592}
593
594static void
595setup_coro (void *arg)
596{ 778{
597 /* 779 /*
598 * emulate part of the perl startup here. 780 * emulate part of the perl startup here.
599 */ 781 */
600 dTHX;
601 dSP;
602 Coro__State ctx = (Coro__State)arg;
603 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
604
605 coro_init_stacks (aTHX); 782 coro_init_stacks (aTHX);
606 /*PL_curcop = 0;*/ 783
607 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 784 PL_runops = RUNOPS_DEFAULT;
785 PL_curcop = &PL_compiling;
786 PL_in_eval = EVAL_NULL;
787 PL_comppad = 0;
788 PL_curpm = 0;
789 PL_curpad = 0;
790 PL_localizing = 0;
791 PL_dirty = 0;
792 PL_restartop = 0;
793#if PERL_VERSION_ATLEAST (5,10,0)
794 PL_parser = 0;
795#endif
796
797 /* recreate the die/warn hooks */
798 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
799 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
800
801 GvSV (PL_defgv) = newSV (0);
802 GvAV (PL_defgv) = coro->args; coro->args = 0;
803 GvSV (PL_errgv) = newSV (0);
804 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
805 PL_rs = newSVsv (GvSV (irsgv));
806 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
807
808 {
809 dSP;
810 LOGOP myop;
811
812 Zero (&myop, 1, LOGOP);
813 myop.op_next = Nullop;
814 myop.op_flags = OPf_WANT_VOID;
815
816 PUSHMARK (SP);
817 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
818 PUTBACK;
819 PL_op = (OP *)&myop;
820 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
821 SPAGAIN;
822 }
823
824 /* this newly created coroutine might be run on an existing cctx which most
825 * likely was suspended in set_stacklevel, called from entersub.
826 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
827 * so we ENTER here for symmetry
828 */
829 ENTER;
830}
831
832static void
833coro_destroy (pTHX_ struct coro *coro)
834{
835 if (!IN_DESTRUCT)
836 {
837 /* restore all saved variables and stuff */
838 LEAVE_SCOPE (0);
839 assert (PL_tmps_floor == -1);
840
841 /* free all temporaries */
842 FREETMPS;
843 assert (PL_tmps_ix == -1);
844
845 /* unwind all extra stacks */
846 POPSTACK_TO (PL_mainstack);
847
848 /* unwind main stack */
849 dounwind (-1);
850 }
851
852 SvREFCNT_dec (GvSV (PL_defgv));
608 SvREFCNT_dec (GvAV (PL_defgv)); 853 SvREFCNT_dec (GvAV (PL_defgv));
609 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 854 SvREFCNT_dec (GvSV (PL_errgv));
855 SvREFCNT_dec (PL_defoutgv);
856 SvREFCNT_dec (PL_rs);
857 SvREFCNT_dec (GvSV (irsgv));
610 858
611 SPAGAIN; 859 SvREFCNT_dec (PL_diehook);
860 SvREFCNT_dec (PL_warnhook);
861
862 SvREFCNT_dec (coro->saved_deffh);
863 SvREFCNT_dec (coro->throw);
612 864
613 if (ctx->stack) 865 coro_destroy_stacks (aTHX);
614 {
615 ctx->cursp = 0;
616
617 PUSHMARK(SP);
618 PUTBACK;
619 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
620
621 if (SvTRUE (ERRSV))
622 croak (NULL);
623 else
624 croak ("FATAL: CCTXT coroutine returned!");
625 }
626 else
627 {
628 UNOP myop;
629
630 PL_op = (OP *)&myop;
631
632 Zero(&myop, 1, UNOP);
633 myop.op_next = Nullop;
634 myop.op_flags = OPf_WANT_VOID;
635
636 PUSHMARK(SP);
637 XPUSHs (sub_init);
638 /*
639 * the next line is slightly wrong, as PL_op->op_next
640 * is actually being executed so we skip the first op.
641 * that doesn't matter, though, since it is only
642 * pp_nextstate and we never return...
643 * ah yes, and I don't care anyways ;)
644 */
645 PUTBACK;
646 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
647 SPAGAIN;
648
649 ENTER; /* necessary e.g. for dounwind */
650 }
651} 866}
652 867
653static void 868static void
654continue_coro (void *arg) 869free_coro_mortal (pTHX)
655{ 870{
656 /* 871 if (expect_true (coro_mortal))
657 * this is a _very_ stripped down perl interpreter ;) 872 {
658 */ 873 SvREFCNT_dec (coro_mortal);
659 dTHX; 874 coro_mortal = 0;
660 Coro__State ctx = (Coro__State)arg;
661
662 PL_top_env = &ctx->start_env;
663
664 ctx->cursp = 0;
665 PL_op = PL_op->op_next;
666 CALLRUNOPS(aTHX);
667
668 abort ();
669}
670
671static void
672transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
673{
674 dSTACKLEVEL;
675
676 if (prev != next)
677 { 875 }
678 if (next->mainstack) 876}
877
878static int
879runops_trace (pTHX)
880{
881 COP *oldcop = 0;
882 int oldcxix = -2;
883 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
884 coro_cctx *cctx = coro->cctx;
885
886 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
887 {
888 PERL_ASYNC_CHECK ();
889
890 if (cctx->flags & CC_TRACE_ALL)
679 { 891 {
680 LOCK; 892 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
681 SAVE (prev, flags);
682 LOAD (next);
683 UNLOCK;
684
685 /* mark this state as in-use */
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 { 893 {
692 if (!prev->stack) 894 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
693 allocate_stack (prev, 0); 895 SV **bot, **top;
694 else if (prev->cursp != stacklevel 896 AV *av = newAV (); /* return values */
695 && prev->stack->usecnt > 1) 897 SV **cb;
898 dSP;
899
900 GV *gv = CvGV (cx->blk_sub.cv);
901 SV *fullname = sv_2mortal (newSV (0));
902 if (isGV (gv))
903 gv_efullname3 (fullname, gv, 0);
904
905 bot = PL_stack_base + cx->blk_oldsp + 1;
906 top = cx->blk_gimme == G_ARRAY ? SP + 1
907 : cx->blk_gimme == G_SCALAR ? bot + 1
908 : bot;
909
910 av_extend (av, top - bot);
911 while (bot < top)
912 av_push (av, SvREFCNT_inc (*bot++));
913
914 PL_runops = RUNOPS_DEFAULT;
915 ENTER;
916 SAVETMPS;
917 EXTEND (SP, 3);
918 PUSHMARK (SP);
919 PUSHs (&PL_sv_no);
920 PUSHs (fullname);
921 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
922 PUTBACK;
923 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
924 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
925 SPAGAIN;
926 FREETMPS;
927 LEAVE;
928 PL_runops = runops_trace;
929 }
930
931 if (oldcop != PL_curcop)
932 {
933 oldcop = PL_curcop;
934
935 if (PL_curcop != &PL_compiling)
696 { 936 {
697 prev->gencnt = ++prev->stack->gencnt; 937 SV **cb;
698 prev->stack->usecnt = 1;
699 }
700 938
701 /* has our stack been invalidated? */ 939 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 { 940 {
704 deallocate_stack (next); 941 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
705 allocate_stack (next, 1); 942
706 coro_create (&(next->stack->cctx), 943 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
707 continue_coro, (void *)next, 944 {
708 next->stack->sptr, labs (next->stack->ssize)); 945 runops_proc_t old_runops = PL_runops;
946 dSP;
947 GV *gv = CvGV (cx->blk_sub.cv);
948 SV *fullname = sv_2mortal (newSV (0));
949
950 if (isGV (gv))
951 gv_efullname3 (fullname, gv, 0);
952
953 PL_runops = RUNOPS_DEFAULT;
954 ENTER;
955 SAVETMPS;
956 EXTEND (SP, 3);
957 PUSHMARK (SP);
958 PUSHs (&PL_sv_yes);
959 PUSHs (fullname);
960 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
961 PUTBACK;
962 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
963 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
964 SPAGAIN;
965 FREETMPS;
966 LEAVE;
967 PL_runops = runops_trace;
968 }
969
970 oldcxix = cxstack_ix;
709 } 971 }
710 972
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 973 if (cctx->flags & CC_TRACE_LINE)
712 prev->cursp = stacklevel;
713 /* don't add any code here */
714 }
715 else
716 next->cursp = stacklevel;
717 }
718 else if (next->tmps_ix == -2)
719 croak ("tried to transfer to running coroutine");
720 else
721 {
722 LOCK;
723 SAVE (prev, -1); /* first get rid of the old state */
724 UNLOCK;
725
726 if (flags & TRANSFER_SAVE_CCTXT)
727 {
728 if (!prev->stack)
729 allocate_stack (prev, 0);
730
731 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732 { 974 {
733 PL_top_env = &next->start_env; 975 dSP;
734 976
735 setup_coro (next); 977 PL_runops = RUNOPS_DEFAULT;
736 next->cursp = stacklevel; 978 ENTER;
737 979 SAVETMPS;
738 prev->stack->refcnt++; 980 EXTEND (SP, 3);
739 prev->stack->usecnt++; 981 PL_runops = RUNOPS_DEFAULT;
740 next->stack = prev->stack; 982 PUSHMARK (SP);
741 next->gencnt = prev->gencnt; 983 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
984 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
985 PUTBACK;
986 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
987 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
988 SPAGAIN;
989 FREETMPS;
990 LEAVE;
991 PL_runops = runops_trace;
742 } 992 }
743 else
744 {
745 assert (!next->stack);
746 allocate_stack (next, 1);
747 coro_create (&(next->stack->cctx),
748 setup_coro, (void *)next,
749 next->stack->sptr, labs (next->stack->ssize));
750 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751 prev->cursp = stacklevel;
752 /* don't add any code here */
753 } 993 }
754 } 994 }
995 }
996 }
997
998 TAINT_NOT;
999 return 0;
1000}
1001
1002/* inject a fake call to Coro::State::_cctx_init into the execution */
1003/* _cctx_init should be careful, as it could be called at almost any time */
1004/* during execution of a perl program */
1005static void NOINLINE
1006cctx_prepare (pTHX_ coro_cctx *cctx)
1007{
1008 dSP;
1009 LOGOP myop;
1010
1011 PL_top_env = &PL_start_env;
1012
1013 if (cctx->flags & CC_TRACE)
1014 PL_runops = runops_trace;
1015
1016 Zero (&myop, 1, LOGOP);
1017 myop.op_next = PL_op;
1018 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1019
1020 PUSHMARK (SP);
1021 EXTEND (SP, 2);
1022 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1023 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1024 PUTBACK;
1025 PL_op = (OP *)&myop;
1026 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1027 SPAGAIN;
1028}
1029
1030/*
1031 * this is a _very_ stripped down perl interpreter ;)
1032 */
1033static void
1034cctx_run (void *arg)
1035{
1036 dTHX;
1037
1038 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1039 UNLOCK;
1040
1041 /* we now skip the entersub that lead to transfer() */
1042 PL_op = PL_op->op_next;
1043
1044 /* inject a fake subroutine call to cctx_init */
1045 cctx_prepare (aTHX_ (coro_cctx *)arg);
1046
1047 /* somebody or something will hit me for both perl_run and PL_restartop */
1048 PL_restartop = PL_op;
1049 perl_run (PL_curinterp);
1050
1051 /*
1052 * If perl-run returns we assume exit() was being called or the coro
1053 * fell off the end, which seems to be the only valid (non-bug)
1054 * reason for perl_run to return. We try to exit by jumping to the
1055 * bootstrap-time "top" top_env, as we cannot restore the "main"
1056 * coroutine as Coro has no such concept
1057 */
1058 PL_top_env = main_top_env;
1059 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1060}
1061
1062static coro_cctx *
1063cctx_new ()
1064{
1065 coro_cctx *cctx;
1066 void *stack_start;
1067 size_t stack_size;
1068
1069 ++cctx_count;
1070
1071 Newz (0, cctx, 1, coro_cctx);
1072
1073#if HAVE_MMAP
1074 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1075 /* mmap supposedly does allocate-on-write for us */
1076 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1077
1078 if (cctx->sptr != (void *)-1)
1079 {
1080# if CORO_STACKGUARD
1081 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1082# endif
1083 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1084 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1085 cctx->flags |= CC_MAPPED;
1086 }
1087 else
1088#endif
1089 {
1090 cctx->ssize = coro_stacksize * (long)sizeof (long);
1091 New (0, cctx->sptr, coro_stacksize, long);
1092
1093 if (!cctx->sptr)
1094 {
1095 perror ("FATAL: unable to allocate stack for coroutine");
1096 _exit (EXIT_FAILURE);
1097 }
1098
1099 stack_start = cctx->sptr;
1100 stack_size = cctx->ssize;
1101 }
1102
1103 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1104 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1105
1106 return cctx;
1107}
1108
1109static void
1110cctx_destroy (coro_cctx *cctx)
1111{
1112 if (!cctx)
1113 return;
1114
1115 --cctx_count;
1116
1117#if CORO_USE_VALGRIND
1118 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1119#endif
1120
1121#if HAVE_MMAP
1122 if (cctx->flags & CC_MAPPED)
1123 munmap (cctx->sptr, cctx->ssize);
1124 else
1125#endif
1126 Safefree (cctx->sptr);
1127
1128 Safefree (cctx);
1129}
1130
1131/* wether this cctx should be destructed */
1132#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1133
1134static coro_cctx *
1135cctx_get (pTHX)
1136{
1137 while (expect_true (cctx_first))
1138 {
1139 coro_cctx *cctx = cctx_first;
1140 cctx_first = cctx->next;
1141 --cctx_idle;
1142
1143 if (expect_true (!CCTX_EXPIRED (cctx)))
1144 return cctx;
1145
1146 cctx_destroy (cctx);
1147 }
1148
1149 return cctx_new ();
1150}
1151
1152static void
1153cctx_put (coro_cctx *cctx)
1154{
1155 /* free another cctx if overlimit */
1156 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1157 {
1158 coro_cctx *first = cctx_first;
1159 cctx_first = first->next;
1160 --cctx_idle;
1161
1162 cctx_destroy (first);
1163 }
1164
1165 ++cctx_idle;
1166 cctx->next = cctx_first;
1167 cctx_first = cctx;
1168}
1169
1170/** coroutine switching *****************************************************/
1171
1172static void
1173transfer_check (pTHX_ struct coro *prev, struct coro *next)
1174{
1175 if (expect_true (prev != next))
1176 {
1177 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1178 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1179
1180 if (expect_false (next->flags & CF_RUNNING))
1181 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1182
1183 if (expect_false (next->flags & CF_DESTROYED))
1184 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1185
1186#if !PERL_VERSION_ATLEAST (5,10,0)
1187 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1188 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1189#endif
1190 }
1191}
1192
1193/* always use the TRANSFER macro */
1194static void NOINLINE
1195transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1196{
1197 dSTACKLEVEL;
1198 static volatile int has_throw;
1199
1200 /* sometimes transfer is only called to set idle_sp */
1201 if (expect_false (!next))
1202 {
1203 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1204 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1205 }
1206 else if (expect_true (prev != next))
1207 {
1208 coro_cctx *prev__cctx;
1209
1210 if (expect_false (prev->flags & CF_NEW))
1211 {
1212 /* create a new empty context */
1213 Newz (0, prev->cctx, 1, coro_cctx);
1214 prev->flags &= ~CF_NEW;
1215 prev->flags |= CF_RUNNING;
1216 }
1217
1218 prev->flags &= ~CF_RUNNING;
1219 next->flags |= CF_RUNNING;
1220
1221 LOCK;
1222
1223 /* first get rid of the old state */
1224 save_perl (aTHX_ prev);
1225
1226 if (expect_false (next->flags & CF_NEW))
1227 {
1228 /* need to start coroutine */
1229 next->flags &= ~CF_NEW;
1230 /* setup coroutine call */
1231 coro_setup (aTHX_ next);
1232 }
755 else 1233 else
1234 load_perl (aTHX_ next);
1235
1236 prev__cctx = prev->cctx;
1237
1238 /* possibly "free" the cctx */
1239 if (expect_true (
1240 prev__cctx->idle_sp == STACKLEVEL
1241 && !(prev__cctx->flags & CC_TRACE)
1242 && !force_cctx
1243 ))
1244 {
1245 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1246 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1247
1248 prev->cctx = 0;
1249
1250 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1251 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1252 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1253 if (!next->cctx)
1254 next->cctx = cctx_get (aTHX);
1255
1256 cctx_put (prev__cctx);
1257 }
1258
1259 ++next->usecount;
1260
1261 if (expect_true (!next->cctx))
1262 next->cctx = cctx_get (aTHX);
1263
1264 has_throw = !!next->throw;
1265
1266 if (expect_false (prev__cctx != next->cctx))
1267 {
1268 prev__cctx->top_env = PL_top_env;
1269 PL_top_env = next->cctx->top_env;
1270 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1271 }
1272
1273 free_coro_mortal (aTHX);
1274 UNLOCK;
1275
1276 if (expect_false (has_throw))
1277 {
1278 struct coro *coro = SvSTATE (coro_current);
1279
1280 if (coro->throw)
756 { 1281 {
1282 SV *exception = coro->throw;
1283 coro->throw = 0;
1284 sv_setsv (ERRSV, exception);
757 setup_coro (next); 1285 croak (0);
758 next->cursp = stacklevel;
759 } 1286 }
760 } 1287 }
761 } 1288 }
1289}
1290
1291struct transfer_args
1292{
1293 struct coro *prev, *next;
1294};
1295
1296#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1297#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1298
1299/** high level stuff ********************************************************/
1300
1301static int
1302coro_state_destroy (pTHX_ struct coro *coro)
1303{
1304 if (coro->flags & CF_DESTROYED)
1305 return 0;
1306
1307 coro->flags |= CF_DESTROYED;
1308
1309 if (coro->flags & CF_READY)
1310 {
1311 /* reduce nready, as destroying a ready coro effectively unreadies it */
1312 /* alternative: look through all ready queues and remove the coro */
1313 LOCK;
1314 --coro_nready;
1315 UNLOCK;
1316 }
1317 else
1318 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1319
1320 if (coro->mainstack && coro->mainstack != main_mainstack)
1321 {
1322 struct coro temp;
1323
1324 if (coro->flags & CF_RUNNING)
1325 croak ("FATAL: tried to destroy currently running coroutine");
1326
1327 save_perl (aTHX_ &temp);
1328 load_perl (aTHX_ coro);
1329
1330 coro_destroy (aTHX_ coro);
1331
1332 load_perl (aTHX_ &temp);
1333
1334 coro->slot = 0;
1335 }
1336
1337 cctx_destroy (coro->cctx);
1338 SvREFCNT_dec (coro->args);
1339
1340 if (coro->next) coro->next->prev = coro->prev;
1341 if (coro->prev) coro->prev->next = coro->next;
1342 if (coro == coro_first) coro_first = coro->next;
1343
1344 return 1;
1345}
1346
1347static int
1348coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1349{
1350 struct coro *coro = (struct coro *)mg->mg_ptr;
1351 mg->mg_ptr = 0;
1352
1353 coro->hv = 0;
1354
1355 if (--coro->refcnt < 0)
1356 {
1357 coro_state_destroy (aTHX_ coro);
1358 Safefree (coro);
1359 }
1360
1361 return 0;
1362}
1363
1364static int
1365coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1366{
1367 struct coro *coro = (struct coro *)mg->mg_ptr;
1368
1369 ++coro->refcnt;
1370
1371 return 0;
1372}
1373
1374static MGVTBL coro_state_vtbl = {
1375 0, 0, 0, 0,
1376 coro_state_free,
1377 0,
1378#ifdef MGf_DUP
1379 coro_state_dup,
1380#else
1381# define MGf_DUP 0
1382#endif
1383};
1384
1385static void
1386prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1387{
1388 ta->prev = SvSTATE (prev_sv);
1389 ta->next = SvSTATE (next_sv);
1390 TRANSFER_CHECK (*ta);
1391}
1392
1393static void
1394api_transfer (SV *prev_sv, SV *next_sv)
1395{
1396 dTHX;
1397 struct transfer_args ta;
1398
1399 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1400 TRANSFER (ta, 1);
1401}
1402
1403/** Coro ********************************************************************/
1404
1405static void
1406coro_enq (pTHX_ SV *coro_sv)
1407{
1408 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1409}
1410
1411static SV *
1412coro_deq (pTHX)
1413{
1414 int prio;
1415
1416 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1417 if (AvFILLp (coro_ready [prio]) >= 0)
1418 return av_shift (coro_ready [prio]);
1419
1420 return 0;
1421}
1422
1423static int
1424api_ready (SV *coro_sv)
1425{
1426 dTHX;
1427 struct coro *coro;
1428 SV *sv_hook;
1429 void (*xs_hook)(void);
1430
1431 if (SvROK (coro_sv))
1432 coro_sv = SvRV (coro_sv);
1433
1434 coro = SvSTATE (coro_sv);
1435
1436 if (coro->flags & CF_READY)
1437 return 0;
1438
1439 coro->flags |= CF_READY;
762 1440
763 LOCK; 1441 LOCK;
764 if (coro_mortal) 1442
765 { 1443 sv_hook = coro_nready ? 0 : coro_readyhook;
766 SvREFCNT_dec (coro_mortal); 1444 xs_hook = coro_nready ? 0 : coroapi.readyhook;
767 coro_mortal = 0; 1445
768 } 1446 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1447 ++coro_nready;
1448
769 UNLOCK; 1449 UNLOCK;
770} 1450
1451 if (sv_hook)
1452 {
1453 dSP;
771 1454
772#define SV_CORO(sv,func) \ 1455 ENTER;
773 do { \ 1456 SAVETMPS;
774 if (SvROK (sv)) \
775 sv = SvRV (sv); \
776 \
777 if (SvTYPE (sv) == SVt_PVHV) \
778 { \
779 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
780 \
781 if (!he) \
782 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
783 \
784 (sv) = SvRV (HeVAL(he)); \
785 } \
786 \
787 /* must also be changed inside Coro::Cont::yield */ \
788 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
789 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
790 \
791 } while(0)
792 1457
793#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 1458 PUSHMARK (SP);
1459 PUTBACK;
1460 call_sv (sv_hook, G_DISCARD);
1461 SPAGAIN;
1462
1463 FREETMPS;
1464 LEAVE;
1465 }
1466
1467 if (xs_hook)
1468 xs_hook ();
1469
1470 return 1;
1471}
1472
1473static int
1474api_is_ready (SV *coro_sv)
1475{
1476 dTHX;
1477 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1478}
794 1479
795static void 1480static void
796api_transfer(pTHX_ SV *prev, SV *next, int flags) 1481prepare_schedule (pTHX_ struct transfer_args *ta)
797{ 1482{
798 SV_CORO (prev, "Coro::transfer"); 1483 SV *prev_sv, *next_sv;
799 SV_CORO (next, "Coro::transfer");
800 1484
801 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1485 for (;;)
802} 1486 {
1487 LOCK;
1488 next_sv = coro_deq (aTHX);
803 1489
804/** Coro ********************************************************************/ 1490 /* nothing to schedule: call the idle handler */
1491 if (expect_false (!next_sv))
1492 {
1493 dSP;
1494 UNLOCK;
805 1495
806#define PRIO_MAX 3 1496 ENTER;
807#define PRIO_HIGH 1 1497 SAVETMPS;
808#define PRIO_NORMAL 0
809#define PRIO_LOW -1
810#define PRIO_IDLE -3
811#define PRIO_MIN -4
812 1498
813/* for Coro.pm */ 1499 PUSHMARK (SP);
814static GV *coro_current, *coro_idle; 1500 PUTBACK;
815static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 1501 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
816static int coro_nready; 1502 SPAGAIN;
1503
1504 FREETMPS;
1505 LEAVE;
1506 continue;
1507 }
1508
1509 ta->next = SvSTATE (next_sv);
1510
1511 /* cannot transfer to destroyed coros, skip and look for next */
1512 if (expect_false (ta->next->flags & CF_DESTROYED))
1513 {
1514 UNLOCK;
1515 SvREFCNT_dec (next_sv);
1516 /* coro_nready is already taken care of by destroy */
1517 continue;
1518 }
1519
1520 --coro_nready;
1521 UNLOCK;
1522 break;
1523 }
1524
1525 /* free this only after the transfer */
1526 prev_sv = SvRV (coro_current);
1527 ta->prev = SvSTATE (prev_sv);
1528 TRANSFER_CHECK (*ta);
1529 assert (ta->next->flags & CF_READY);
1530 ta->next->flags &= ~CF_READY;
1531 SvRV_set (coro_current, next_sv);
1532
1533 LOCK;
1534 free_coro_mortal (aTHX);
1535 coro_mortal = prev_sv;
1536 UNLOCK;
1537}
817 1538
818static void 1539static void
819coro_enq (pTHX_ SV *sv) 1540prepare_cede (pTHX_ struct transfer_args *ta)
820{ 1541{
821 SV **xprio; 1542 api_ready (coro_current);
822 int prio; 1543 prepare_schedule (aTHX_ ta);
1544}
823 1545
824 if (SvTYPE (sv) != SVt_PVHV) 1546static int
825 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1547prepare_cede_notself (pTHX_ struct transfer_args *ta)
826 1548{
827 xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
828 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
829
830 prio = prio > PRIO_MAX ? PRIO_MAX
831 : prio < PRIO_MIN ? PRIO_MIN
832 : prio;
833
834 av_push (coro_ready [prio - PRIO_MIN], sv);
835 coro_nready++; 1549 if (coro_nready)
836}
837
838static SV *
839coro_deq (pTHX_ int min_prio)
840{
841 int prio = PRIO_MAX - PRIO_MIN;
842
843 min_prio -= PRIO_MIN;
844 if (min_prio < 0)
845 min_prio = 0;
846
847 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
848 if (av_len (coro_ready[prio]) >= 0)
849 { 1550 {
850 coro_nready--; 1551 SV *prev = SvRV (coro_current);
851 return av_shift (coro_ready[prio]); 1552 prepare_schedule (aTHX_ ta);
1553 api_ready (prev);
1554 return 1;
852 } 1555 }
853 1556 else
854 return 0; 1557 return 0;
855}
856
857static void
858api_ready (SV *coro)
859{
860 dTHX;
861
862 if (SvROK (coro))
863 coro = SvRV (coro);
864
865 LOCK;
866 coro_enq (aTHX_ SvREFCNT_inc (coro));
867 UNLOCK;
868} 1558}
869 1559
870static void 1560static void
871api_schedule (void) 1561api_schedule (void)
872{ 1562{
873 dTHX; 1563 dTHX;
1564 struct transfer_args ta;
874 1565
875 SV *prev, *next; 1566 prepare_schedule (aTHX_ &ta);
1567 TRANSFER (ta, 1);
1568}
876 1569
877 LOCK; 1570static int
1571api_cede (void)
1572{
1573 dTHX;
1574 struct transfer_args ta;
878 1575
879 prev = SvRV (GvSV (coro_current)); 1576 prepare_cede (aTHX_ &ta);
880 next = coro_deq (aTHX_ PRIO_MIN);
881 1577
882 if (!next) 1578 if (expect_true (ta.prev != ta.next))
883 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1579 {
1580 TRANSFER (ta, 1);
1581 return 1;
1582 }
1583 else
1584 return 0;
1585}
884 1586
885 /* free this only after the transfer */ 1587static int
886 coro_mortal = prev; 1588api_cede_notself (void)
887 SV_CORO (prev, "Coro::schedule"); 1589{
1590 dTHX;
1591 struct transfer_args ta;
888 1592
889 SvRV (GvSV (coro_current)) = next; 1593 if (prepare_cede_notself (aTHX_ &ta))
890 1594 {
891 SV_CORO (next, "Coro::schedule"); 1595 TRANSFER (ta, 1);
892 1596 return 1;
893 UNLOCK; 1597 }
894 1598 else
895 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1599 return 0;
896 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
897} 1600}
898 1601
899static void 1602static void
900api_cede (void) 1603api_trace (SV *coro_sv, int flags)
901{ 1604{
902 dTHX; 1605 dTHX;
1606 struct coro *coro = SvSTATE (coro_sv);
903 1607
904 LOCK; 1608 if (flags & CC_TRACE)
905 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1609 {
906 UNLOCK; 1610 if (!coro->cctx)
1611 coro->cctx = cctx_new ();
1612 else if (!(coro->cctx->flags & CC_TRACE))
1613 croak ("cannot enable tracing on coroutine with custom stack");
907 1614
908 api_schedule (); 1615 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
909} 1616 }
1617 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1618 {
1619 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
910 1620
1621 if (coro->flags & CF_RUNNING)
1622 PL_runops = RUNOPS_DEFAULT;
1623 else
1624 coro->slot->runops = RUNOPS_DEFAULT;
1625 }
1626}
1627
911MODULE = Coro::State PACKAGE = Coro::State 1628MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
912 1629
913PROTOTYPES: ENABLE 1630PROTOTYPES: DISABLE
914 1631
915BOOT: 1632BOOT:
916{ /* {} necessary for stoopid perl-5.6.x */ 1633{
917#ifdef USE_ITHREADS 1634#ifdef USE_ITHREADS
918 MUTEX_INIT (&coro_mutex); 1635 MUTEX_INIT (&coro_mutex);
919#endif 1636#endif
920 BOOT_PAGESIZE; 1637 BOOT_PAGESIZE;
921 1638
922 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1639 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
923 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1640 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1641
1642 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1643 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1644 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1645
1646 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1647 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1648 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1649
924 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1650 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
925 1651
926 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1652 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
927 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1653 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
928 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1654 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
929 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1655 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
930 1656
931 main_mainstack = PL_mainstack; 1657 main_mainstack = PL_mainstack;
1658 main_top_env = PL_top_env;
932 1659
1660 while (main_top_env->je_prev)
1661 main_top_env = main_top_env->je_prev;
1662
933 coroapi.ver = CORO_API_VERSION; 1663 coroapi.ver = CORO_API_VERSION;
1664 coroapi.rev = CORO_API_REVISION;
934 coroapi.transfer = api_transfer; 1665 coroapi.transfer = api_transfer;
935}
936 1666
937Coro::State 1667 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
938_newprocess(args) 1668}
939 SV * args 1669
940 PROTOTYPE: $ 1670SV *
1671new (char *klass, ...)
941 CODE: 1672 CODE:
942 Coro__State coro; 1673{
1674 struct coro *coro;
1675 MAGIC *mg;
1676 HV *hv;
1677 int i;
943 1678
944 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
945 croak ("Coro::State::_newprocess expects an arrayref");
946
947 Newz (0, coro, 1, struct coro); 1679 Newz (0, coro, 1, struct coro);
1680 coro->args = newAV ();
1681 coro->flags = CF_NEW;
948 1682
949 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1683 if (coro_first) coro_first->prev = coro;
950 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1684 coro->next = coro_first;
951 /*coro->stack = 0;*/ 1685 coro_first = coro;
952 1686
953 /* same as JMPENV_BOOTSTRAP */ 1687 coro->hv = hv = newHV ();
954 /* we might be able to recycle start_env, but safe is safe */ 1688 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
955 /*Zero(&coro->start_env, 1, JMPENV);*/ 1689 mg->mg_flags |= MGf_DUP;
956 coro->start_env.je_ret = -1; 1690 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
957 coro->start_env.je_mustcatch = TRUE;
958 1691
959 RETVAL = coro; 1692 av_extend (coro->args, items - 1);
1693 for (i = 1; i < items; i++)
1694 av_push (coro->args, newSVsv (ST (i)));
1695}
960 OUTPUT: 1696 OUTPUT:
961 RETVAL 1697 RETVAL
962 1698
1699# these not obviously related functions are all rolled into the same xs
1700# function to increase chances that they all will call transfer with the same
1701# stack offset
963void 1702void
964transfer(prev, next, flags) 1703_set_stacklevel (...)
965 SV *prev 1704 ALIAS:
966 SV *next 1705 Coro::State::transfer = 1
967 int flags 1706 Coro::schedule = 2
968 PROTOTYPE: @ 1707 Coro::cede = 3
1708 Coro::cede_notself = 4
969 CODE: 1709 CODE:
1710{
1711 struct transfer_args ta;
1712
970 PUTBACK; 1713 PUTBACK;
971 SV_CORO (next, "Coro::transfer"); 1714 switch (ix)
972 SV_CORO (prev, "Coro::transfer"); 1715 {
973 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1716 case 0:
1717 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1718 ta.next = 0;
1719 break;
1720
1721 case 1:
1722 if (items != 2)
1723 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1724
1725 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1726 break;
1727
1728 case 2:
1729 prepare_schedule (aTHX_ &ta);
1730 break;
1731
1732 case 3:
1733 prepare_cede (aTHX_ &ta);
1734 break;
1735
1736 case 4:
1737 if (!prepare_cede_notself (aTHX_ &ta))
1738 XSRETURN_EMPTY;
1739
1740 break;
1741 }
974 SPAGAIN; 1742 SPAGAIN;
975 1743
1744 BARRIER;
1745 PUTBACK;
1746 TRANSFER (ta, 0);
1747 SPAGAIN; /* might be the sp of a different coroutine now */
1748 /* be extra careful not to ever do anything after TRANSFER */
1749}
1750
1751bool
1752_destroy (SV *coro_sv)
1753 CODE:
1754 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1755 OUTPUT:
1756 RETVAL
1757
976void 1758void
977DESTROY(coro)
978 Coro::State coro
979 CODE:
980
981 if (coro->mainstack && coro->mainstack != main_mainstack)
982 {
983 struct coro temp;
984
985 PUTBACK;
986 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
987 LOAD (aTHX_ coro);
988 SPAGAIN;
989
990 destroy_stacks (aTHX);
991
992 LOAD ((&temp)); /* this will get rid of defsv etc.. */
993 SPAGAIN;
994
995 coro->mainstack = 0;
996 }
997
998 deallocate_stack (coro);
999 SvREFCNT_dec (coro->args);
1000 Safefree (coro);
1001
1002void
1003_exit(code) 1759_exit (int code)
1004 int code
1005 PROTOTYPE: $ 1760 PROTOTYPE: $
1006 CODE: 1761 CODE:
1007 _exit (code); 1762 _exit (code);
1008 1763
1009MODULE = Coro::State PACKAGE = Coro::Cont 1764int
1765cctx_stacksize (int new_stacksize = 0)
1766 CODE:
1767 RETVAL = coro_stacksize;
1768 if (new_stacksize)
1769 coro_stacksize = new_stacksize;
1770 OUTPUT:
1771 RETVAL
1010 1772
1011# this is slightly dirty (should expose a c-level api) 1773int
1774cctx_count ()
1775 CODE:
1776 RETVAL = cctx_count;
1777 OUTPUT:
1778 RETVAL
1779
1780int
1781cctx_idle ()
1782 CODE:
1783 RETVAL = cctx_idle;
1784 OUTPUT:
1785 RETVAL
1012 1786
1013void 1787void
1014yield(...) 1788list ()
1015 PROTOTYPE: @ 1789 PPCODE:
1790{
1791 struct coro *coro;
1792 for (coro = coro_first; coro; coro = coro->next)
1793 if (coro->hv)
1794 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1795}
1796
1797void
1798call (Coro::State coro, SV *coderef)
1799 ALIAS:
1800 eval = 1
1801 CODE:
1802{
1803 if (coro->mainstack)
1804 {
1805 struct coro temp;
1806
1807 if (!(coro->flags & CF_RUNNING))
1808 {
1809 PUTBACK;
1810 save_perl (aTHX_ &temp);
1811 load_perl (aTHX_ coro);
1812 }
1813
1814 {
1815 dSP;
1816 ENTER;
1817 SAVETMPS;
1818 PUTBACK;
1819 PUSHSTACK;
1820 PUSHMARK (SP);
1821
1822 if (ix)
1823 eval_sv (coderef, 0);
1824 else
1825 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1826
1827 POPSTACK;
1828 SPAGAIN;
1829 FREETMPS;
1830 LEAVE;
1831 PUTBACK;
1832 }
1833
1834 if (!(coro->flags & CF_RUNNING))
1835 {
1836 save_perl (aTHX_ coro);
1837 load_perl (aTHX_ &temp);
1838 SPAGAIN;
1839 }
1840 }
1841}
1842
1843SV *
1844is_ready (Coro::State coro)
1845 PROTOTYPE: $
1846 ALIAS:
1847 is_ready = CF_READY
1848 is_running = CF_RUNNING
1849 is_new = CF_NEW
1850 is_destroyed = CF_DESTROYED
1851 CODE:
1852 RETVAL = boolSV (coro->flags & ix);
1853 OUTPUT:
1854 RETVAL
1855
1856void
1857api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1858
1859SV *
1860has_cctx (Coro::State coro)
1861 PROTOTYPE: $
1862 CODE:
1863 RETVAL = boolSV (!!coro->cctx);
1864 OUTPUT:
1865 RETVAL
1866
1867int
1868is_traced (Coro::State coro)
1869 PROTOTYPE: $
1870 CODE:
1871 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1872 OUTPUT:
1873 RETVAL
1874
1875IV
1876rss (Coro::State coro)
1877 PROTOTYPE: $
1878 ALIAS:
1879 usecount = 1
1016 CODE: 1880 CODE:
1017 SV *yieldstack; 1881 switch (ix)
1018 SV *sv; 1882 {
1019 AV *defav = GvAV (PL_defgv); 1883 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1020 struct coro *prev, *next; 1884 case 1: RETVAL = coro->usecount; break;
1021
1022 yieldstack = *hv_fetch (
1023 (HV *)SvRV (GvSV (coro_current)),
1024 "yieldstack", sizeof ("yieldstack") - 1,
1025 0 1885 }
1026 ); 1886 OUTPUT:
1887 RETVAL
1027 1888
1028 /* set up @_ -- ugly */ 1889void
1029 av_clear (defav); 1890force_cctx ()
1030 av_fill (defav, items - 1); 1891 CODE:
1031 while (items--) 1892 struct coro *coro = SvSTATE (coro_current);
1032 av_store (defav, items, SvREFCNT_inc (ST(items))); 1893 coro->cctx->idle_sp = 0;
1033 1894
1034 sv = av_pop ((AV *)SvRV (yieldstack)); 1895void
1035 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)))); 1896throw (Coro::State self, SV *throw = &PL_sv_undef)
1036 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)))); 1897 PROTOTYPE: $;$
1898 CODE:
1037 SvREFCNT_dec (sv); 1899 SvREFCNT_dec (self->throw);
1900 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1038 1901
1039 transfer (aTHX_ prev, next, 0); 1902void
1903swap_defsv (Coro::State self)
1904 PROTOTYPE: $
1905 ALIAS:
1906 swap_defav = 1
1907 CODE:
1908 if (!self->slot)
1909 croak ("cannot swap state with coroutine that has no saved state");
1910 else
1911 {
1912 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1913 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1914
1915 SV *tmp = *src; *src = *dst; *dst = tmp;
1916 }
1040 1917
1041MODULE = Coro::State PACKAGE = Coro 1918MODULE = Coro::State PACKAGE = Coro
1042 1919
1043# this is slightly dirty (should expose a c-level api)
1044
1045BOOT: 1920BOOT:
1046{ 1921{
1047 int i; 1922 int i;
1923
1924 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1925 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1926 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1927
1928 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1929 SvREADONLY_on (coro_current);
1930
1048 HV *stash = gv_stashpv ("Coro", TRUE); 1931 coro_stash = gv_stashpv ("Coro", TRUE);
1049 1932
1050 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1933 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1934 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1935 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1936 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1937 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1938 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056
1057 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059 1939
1060 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1940 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061 coro_ready[i] = newAV (); 1941 coro_ready[i] = newAV ();
1062 1942
1063 { 1943 {
1064 SV *sv = perl_get_sv("Coro::API", 1); 1944 SV *sv = perl_get_sv ("Coro::API", TRUE);
1945 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1065 1946
1066 coroapi.schedule = api_schedule; 1947 coroapi.schedule = api_schedule;
1067 coroapi.cede = api_cede; 1948 coroapi.cede = api_cede;
1949 coroapi.cede_notself = api_cede_notself;
1068 coroapi.ready = api_ready; 1950 coroapi.ready = api_ready;
1951 coroapi.is_ready = api_is_ready;
1069 coroapi.nready = &coro_nready; 1952 coroapi.nready = &coro_nready;
1070 coroapi.current = coro_current; 1953 coroapi.current = coro_current;
1071 1954
1072 GCoroAPI = &coroapi; 1955 GCoroAPI = &coroapi;
1073 sv_setiv(sv, (IV)&coroapi); 1956 sv_setiv (sv, (IV)&coroapi);
1074 SvREADONLY_on(sv); 1957 SvREADONLY_on (sv);
1075 } 1958 }
1076} 1959}
1077 1960
1078#if !PERL_MICRO
1079
1080void 1961void
1081ready(self) 1962_set_current (SV *current)
1082 SV * self
1083 PROTOTYPE: $ 1963 PROTOTYPE: $
1084 CODE: 1964 CODE:
1085 api_ready (self); 1965 SvREFCNT_dec (SvRV (coro_current));
1966 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1086 1967
1087#endif 1968void
1969_set_readyhook (SV *hook)
1970 PROTOTYPE: $
1971 CODE:
1972 LOCK;
1973 SvREFCNT_dec (coro_readyhook);
1974 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1975 UNLOCK;
1088 1976
1089int 1977int
1978prio (Coro::State coro, int newprio = 0)
1979 ALIAS:
1980 nice = 1
1981 CODE:
1982{
1983 RETVAL = coro->prio;
1984
1985 if (items > 1)
1986 {
1987 if (ix)
1988 newprio = coro->prio - newprio;
1989
1990 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1991 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1992
1993 coro->prio = newprio;
1994 }
1995}
1996 OUTPUT:
1997 RETVAL
1998
1999SV *
2000ready (SV *self)
2001 PROTOTYPE: $
2002 CODE:
2003 RETVAL = boolSV (api_ready (self));
2004 OUTPUT:
2005 RETVAL
2006
2007int
1090nready(...) 2008nready (...)
1091 PROTOTYPE: 2009 PROTOTYPE:
1092 CODE: 2010 CODE:
1093 RETVAL = coro_nready; 2011 RETVAL = coro_nready;
1094 OUTPUT: 2012 OUTPUT:
1095 RETVAL 2013 RETVAL
1096 2014
2015# for async_pool speedup
1097void 2016void
1098schedule(...) 2017_pool_1 (SV *cb)
1099 PROTOTYPE:
1100 CODE: 2018 CODE:
1101 api_schedule (); 2019{
2020 struct coro *coro = SvSTATE (coro_current);
2021 HV *hv = (HV *)SvRV (coro_current);
2022 AV *defav = GvAV (PL_defgv);
2023 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2024 AV *invoke_av;
2025 int i, len;
2026
2027 if (!invoke)
2028 {
2029 SV *old = PL_diehook;
2030 PL_diehook = 0;
2031 SvREFCNT_dec (old);
2032 croak ("\3async_pool terminate\2\n");
2033 }
2034
2035 SvREFCNT_dec (coro->saved_deffh);
2036 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2037
2038 hv_store (hv, "desc", sizeof ("desc") - 1,
2039 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2040
2041 invoke_av = (AV *)SvRV (invoke);
2042 len = av_len (invoke_av);
2043
2044 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2045
2046 if (len > 0)
2047 {
2048 av_fill (defav, len - 1);
2049 for (i = 0; i < len; ++i)
2050 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2051 }
2052
2053 SvREFCNT_dec (invoke);
2054}
1102 2055
1103void 2056void
1104cede(...) 2057_pool_2 (SV *cb)
1105 PROTOTYPE:
1106 CODE: 2058 CODE:
1107 api_cede (); 2059{
2060 struct coro *coro = SvSTATE (coro_current);
1108 2061
1109# and these are hacks 2062 sv_setsv (cb, &PL_sv_undef);
2063
2064 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2065 coro->saved_deffh = 0;
2066
2067 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2068 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2069 {
2070 SV *old = PL_diehook;
2071 PL_diehook = 0;
2072 SvREFCNT_dec (old);
2073 croak ("\3async_pool terminate\2\n");
2074 }
2075
2076 av_clear (GvAV (PL_defgv));
2077 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2078 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2079
2080 coro->prio = 0;
2081
2082 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2083 api_trace (coro_current, 0);
2084
2085 av_push (av_async_pool, newSVsv (coro_current));
2086}
2087
2088
2089MODULE = Coro::State PACKAGE = Coro::AIO
2090
1110SV * 2091SV *
1111_aio_get_state () 2092_get_state ()
1112 CODE: 2093 CODE:
1113{ 2094{
1114 struct { 2095 struct io_state *data;
1115 int errorno;
1116 int laststype;
1117 int laststatval;
1118 Stat_t statcache;
1119 } data;
1120 2096
2097 RETVAL = newSV (sizeof (struct io_state));
2098 data = (struct io_state *)SvPVX (RETVAL);
2099 SvCUR_set (RETVAL, sizeof (struct io_state));
2100 SvPOK_only (RETVAL);
2101
1121 data.errorno = errno; 2102 data->errorno = errno;
1122 data.laststype = PL_laststype; 2103 data->laststype = PL_laststype;
1123 data.laststatval = PL_laststatval; 2104 data->laststatval = PL_laststatval;
1124 data.statcache = PL_statcache; 2105 data->statcache = PL_statcache;
1125
1126 RETVAL = newSVpvn ((char *)&data, sizeof data);
1127} 2106}
1128 OUTPUT: 2107 OUTPUT:
1129 RETVAL 2108 RETVAL
1130 2109
1131void 2110void
1132_aio_set_state (char *data_) 2111_set_state (char *data_)
1133 PROTOTYPE: $ 2112 PROTOTYPE: $
1134 CODE: 2113 CODE:
1135{ 2114{
1136 struct { 2115 struct io_state *data = (void *)data_;
1137 int errorno;
1138 int laststype;
1139 int laststatval;
1140 Stat_t statcache;
1141 } *data = (void *)data_;
1142 2116
1143 errno = data->errorno; 2117 errno = data->errorno;
1144 PL_laststype = data->laststype; 2118 PL_laststype = data->laststype;
1145 PL_laststatval = data->laststatval; 2119 PL_laststatval = data->laststatval;
1146 PL_statcache = data->statcache; 2120 PL_statcache = data->statcache;
1147} 2121}
2122
2123
2124MODULE = Coro::State PACKAGE = Coro::AnyEvent
2125
2126BOOT:
2127 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2128
2129SV *
2130_schedule (...)
2131 PROTOTYPE: @
2132 CODE:
2133{
2134 static int incede;
2135
2136 api_cede_notself ();
2137
2138 ++incede;
2139 while (coro_nready >= incede && api_cede ())
2140 ;
2141
2142 sv_setsv (sv_activity, &PL_sv_undef);
2143 if (coro_nready >= incede)
2144 {
2145 PUSHMARK (SP);
2146 PUTBACK;
2147 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2148 SPAGAIN;
2149 }
2150
2151 --incede;
2152}
2153

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