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Comparing Coro/Coro/State.xs (file contents):
Revision 1.83 by root, Mon Nov 20 22:32:44 2006 UTC vs.
Revision 1.243 by root, Sat Aug 30 03:07:46 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 optional C context */ 233 /* the c coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 234 coro_cctx *cctx;
107 void *cursp;
108 int gencnt;
109 235
110 /* optionally saved, might be zero */ 236 /* process data */
111 AV *defav;
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118
119 /* the stacks and related info (callchain etc..) */
120 PERL_SI *curstackinfo;
121 AV *curstack;
122 AV *mainstack; 237 AV *mainstack;
123 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
124 OP *op;
125 SV **curpad;
126 AV *comppad;
127 CV *compcv;
128 SV **stack_base;
129 SV **stack_max;
130 SV **tmps_stack;
131 I32 tmps_floor;
132 I32 tmps_ix;
133 I32 tmps_max;
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 JMPENV *top_env;
149 239
150 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
151 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;
152}; 257};
153 258
154typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
155typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
156 261
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
157static AV * 310static AV *
158coro_clone_padlist (pTHX_ CV *cv) 311coro_clone_padlist (pTHX_ CV *cv)
159{ 312{
160 AV *padlist = CvPADLIST (cv); 313 AV *padlist = CvPADLIST (cv);
161 AV *newpadlist, *newpad; 314 AV *newpadlist, *newpad;
162 315
163 newpadlist = newAV (); 316 newpadlist = newAV ();
164 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
165#if PERL_VERSION < 9 318#if PERL_VERSION_ATLEAST (5,10,0)
319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
320#else
166 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167#else
168 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169#endif 322#endif
170 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171 --AvFILLp (padlist); 324 --AvFILLp (padlist);
172 325
173 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
… …
208 361
209 /* casting is fun. */ 362 /* casting is fun. */
210 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211 free_padlist (aTHX_ padlist); 364 free_padlist (aTHX_ padlist);
212 365
213 SvREFCNT_dec (av);
214
215 return 0; 366 return 0;
216} 367}
217 368
218#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
219 371
220static 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))
221 412
222/* the next two functions merely cache the padlists */ 413/* the next two functions merely cache the padlists */
223static void 414static void
224get_padlist (pTHX_ CV *cv) 415get_padlist (pTHX_ CV *cv)
225{ 416{
226 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 417 MAGIC *mg = CORO_MAGIC_cv (cv);
418 AV *av;
227 419
228 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
229 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230 else 422 else
231 { 423 {
232#if 0 424#if CORO_PREFER_PERL_FUNCTIONS
233 /* this should work - but it doesn't :( */ 425 /* this is probably cleaner, but also slower? */
234 CV *cp = Perl_cv_clone (aTHX_ cv); 426 CV *cp = Perl_cv_clone (cv);
235 CvPADLIST (cv) = CvPADLIST (cp); 427 CvPADLIST (cv) = CvPADLIST (cp);
236 CvPADLIST (cp) = 0; 428 CvPADLIST (cp) = 0;
237 SvREFCNT_dec (cp); 429 SvREFCNT_dec (cp);
238#else 430#else
239 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
242} 434}
243 435
244static void 436static void
245put_padlist (pTHX_ CV *cv) 437put_padlist (pTHX_ CV *cv)
246{ 438{
247 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 439 MAGIC *mg = CORO_MAGIC_cv (cv);
440 AV *av;
248 441
249 if (!mg) 442 if (expect_false (!mg))
250 { 443 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
251 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253 mg->mg_virtual = &vtbl_coro;
254 mg->mg_obj = (SV *)newAV ();
255 }
256 444
257 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 445 av = (AV *)mg->mg_obj;
258}
259 446
260#define SB do { 447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
261#define SE } while (0) 448 av_extend (av, AvMAX (av) + 1);
262 449
263#define LOAD(state) load_state(aTHX_ (state)); 450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
264#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 451}
265 452
266#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 453/** load & save, init *******************************************************/
267 454
268static void 455static void
269load_state(pTHX_ Coro__State c) 456load_perl (pTHX_ Coro__State c)
270{ 457{
271 PL_dowarn = c->dowarn; 458 perl_slots *slot = c->slot;
272 PL_in_eval = c->in_eval; 459 c->slot = 0;
273 460
274 PL_curstackinfo = c->curstackinfo;
275 PL_curstack = c->curstack;
276 PL_mainstack = c->mainstack; 461 PL_mainstack = c->mainstack;
277 PL_stack_sp = c->stack_sp;
278 PL_op = c->op;
279 PL_curpad = c->curpad;
280 PL_comppad = c->comppad;
281 PL_compcv = c->compcv;
282 PL_stack_base = c->stack_base;
283 PL_stack_max = c->stack_max;
284 PL_tmps_stack = c->tmps_stack;
285 PL_tmps_floor = c->tmps_floor;
286 PL_tmps_ix = c->tmps_ix;
287 PL_tmps_max = c->tmps_max;
288 PL_markstack = c->markstack;
289 PL_markstack_ptr = c->markstack_ptr;
290 PL_markstack_max = c->markstack_max;
291 PL_scopestack = c->scopestack;
292 PL_scopestack_ix = c->scopestack_ix;
293 PL_scopestack_max = c->scopestack_max;
294 PL_savestack = c->savestack;
295 PL_savestack_ix = c->savestack_ix;
296 PL_savestack_max = c->savestack_max;
297#if PERL_VERSION < 9
298 PL_retstack = c->retstack;
299 PL_retstack_ix = c->retstack_ix;
300 PL_retstack_max = c->retstack_max;
301#endif
302 PL_curpm = c->curpm;
303 PL_curcop = c->curcop;
304 PL_top_env = c->top_env;
305 462
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 463 GvSV (PL_defgv) = slot->defsv;
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 464 GvAV (PL_defgv) = slot->defav;
308 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
309 471
310 { 472 {
311 dSP; 473 dSP;
474
312 CV *cv; 475 CV *cv;
313 476
314 /* now do the ugly restore mess */ 477 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs)) 478 while (expect_true (cv = (CV *)POPs))
316 { 479 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */ 480 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist; 481 CvDEPTH (cv) = PTR2IV (POPs);
323 } 482 CvPADLIST (cv) = (AV *)POPs;
324
325 ++CvDEPTH(cv);
326 } 483 }
327 484
328 PUTBACK; 485 PUTBACK;
329 } 486 }
330} 487}
331 488
332static void 489static void
333save_state(pTHX_ Coro__State c, int flags) 490save_perl (pTHX_ Coro__State c)
334{ 491{
335 { 492 {
336 dSP; 493 dSP;
337 I32 cxix = cxstack_ix; 494 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack; 495 PERL_CONTEXT *ccstk = cxstack;
… …
341 /* 498 /*
342 * 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
343 * (and reinitialize) all cv's in the whole callchain :( 500 * (and reinitialize) all cv's in the whole callchain :(
344 */ 501 */
345 502
346 PUSHs (Nullsv); 503 XPUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */ 504 /* this loop was inspired by pp_caller */
348 for (;;) 505 for (;;)
349 { 506 {
350 while (cxix >= 0) 507 while (expect_true (cxix >= 0))
351 { 508 {
352 PERL_CONTEXT *cx = &ccstk[cxix--]; 509 PERL_CONTEXT *cx = &ccstk[cxix--];
353 510
354 if (CxTYPE(cx) == CXt_SUB) 511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355 { 512 {
356 CV *cv = cx->blk_sub.cv; 513 CV *cv = cx->blk_sub.cv;
514
357 if (CvDEPTH(cv)) 515 if (expect_true (CvDEPTH (cv)))
358 { 516 {
359 EXTEND (SP, CvDEPTH(cv)*2); 517 EXTEND (SP, 3);
360
361 while (--CvDEPTH(cv))
362 {
363 /* this tells the restore code to increment CvDEPTH */
364 PUSHs (Nullsv);
365 PUSHs ((SV *)cv);
366 }
367
368 PUSHs ((SV *)CvPADLIST(cv)); 518 PUSHs ((SV *)CvPADLIST (cv));
519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
369 PUSHs ((SV *)cv); 520 PUSHs ((SV *)cv);
370 521
522 CvDEPTH (cv) = 0;
371 get_padlist (aTHX_ cv); 523 get_padlist (aTHX_ cv);
372 } 524 }
373 } 525 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE(cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 526 }
383 527
384 if (top_si->si_type == PERLSI_MAIN) 528 if (expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 529 break;
386 530
387 top_si = top_si->si_prev; 531 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 532 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 533 cxix = top_si->si_cxix;
390 } 534 }
391 535
392 PUTBACK; 536 PUTBACK;
393 } 537 }
394 538
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 539 /* allocate some space on the context stack for our purposes */
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 540 /* we manually unroll here, as usually 2 slots is enough */
397 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 */
398 550
399 c->dowarn = PL_dowarn;
400 c->in_eval = PL_in_eval;
401
402 c->curstackinfo = PL_curstackinfo;
403 c->curstack = PL_curstack;
404 c->mainstack = PL_mainstack; 551 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp; 552
406 c->op = PL_op; 553 {
407 c->curpad = PL_curpad; 554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408 c->comppad = PL_comppad; 555
409 c->compcv = PL_compcv; 556 slot->defav = GvAV (PL_defgv);
410 c->stack_base = PL_stack_base; 557 slot->defsv = DEFSV;
411 c->stack_max = PL_stack_max; 558 slot->errsv = ERRSV;
412 c->tmps_stack = PL_tmps_stack; 559 slot->irsgv = GvSV (irsgv);
413 c->tmps_floor = PL_tmps_floor; 560
414 c->tmps_ix = PL_tmps_ix; 561 #define VAR(name,type) slot->name = PL_ ## name;
415 c->tmps_max = PL_tmps_max; 562 # include "state.h"
416 c->markstack = PL_markstack; 563 #undef VAR
417 c->markstack_ptr = PL_markstack_ptr; 564 }
418 c->markstack_max = PL_markstack_max;
419 c->scopestack = PL_scopestack;
420 c->scopestack_ix = PL_scopestack_ix;
421 c->scopestack_max = PL_scopestack_max;
422 c->savestack = PL_savestack;
423 c->savestack_ix = PL_savestack_ix;
424 c->savestack_max = PL_savestack_max;
425#if PERL_VERSION < 9
426 c->retstack = PL_retstack;
427 c->retstack_ix = PL_retstack_ix;
428 c->retstack_max = PL_retstack_max;
429#endif
430 c->curpm = PL_curpm;
431 c->curcop = PL_curcop;
432 c->top_env = PL_top_env;
433} 565}
434 566
435/* 567/*
436 * allocate various perl stacks. This is an exact copy 568 * allocate various perl stacks. This is an exact copy
437 * of perl.c:init_stacks, except that it uses less memory 569 * of perl.c:init_stacks, except that it uses less memory
438 * on the (sometimes correct) assumption that coroutines do 570 * on the (sometimes correct) assumption that coroutines do
439 * not usually need a lot of stackspace. 571 * not usually need a lot of stackspace.
440 */ 572 */
573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
441static void 576static void
442coro_init_stacks (pTHX) 577coro_init_stacks (pTHX)
443{ 578{
444 LOCK; 579 PL_curstackinfo = new_stackinfo(32, 8);
445
446 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447 PL_curstackinfo->si_type = PERLSI_MAIN; 580 PL_curstackinfo->si_type = PERLSI_MAIN;
448 PL_curstack = PL_curstackinfo->si_stack; 581 PL_curstack = PL_curstackinfo->si_stack;
449 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450 583
451 PL_stack_base = AvARRAY(PL_curstack); 584 PL_stack_base = AvARRAY(PL_curstack);
452 PL_stack_sp = PL_stack_base; 585 PL_stack_sp = PL_stack_base;
453 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454 587
455 New(50,PL_tmps_stack,96,SV*); 588 New(50,PL_tmps_stack,32,SV*);
456 PL_tmps_floor = -1; 589 PL_tmps_floor = -1;
457 PL_tmps_ix = -1; 590 PL_tmps_ix = -1;
458 PL_tmps_max = 96; 591 PL_tmps_max = 32;
459 592
460 New(54,PL_markstack,16,I32); 593 New(54,PL_markstack,16,I32);
461 PL_markstack_ptr = PL_markstack; 594 PL_markstack_ptr = PL_markstack;
462 PL_markstack_max = PL_markstack + 16; 595 PL_markstack_max = PL_markstack + 16;
463 596
464#ifdef SET_MARK_OFFSET 597#ifdef SET_MARK_OFFSET
465 SET_MARK_OFFSET; 598 SET_MARK_OFFSET;
466#endif 599#endif
467 600
468 New(54,PL_scopestack,16,I32); 601 New(54,PL_scopestack,8,I32);
469 PL_scopestack_ix = 0; 602 PL_scopestack_ix = 0;
470 PL_scopestack_max = 16; 603 PL_scopestack_max = 8;
471 604
472 New(54,PL_savestack,96,ANY); 605 New(54,PL_savestack,24,ANY);
473 PL_savestack_ix = 0; 606 PL_savestack_ix = 0;
474 PL_savestack_max = 96; 607 PL_savestack_max = 24;
475 608
476#if PERL_VERSION < 9 609#if !PERL_VERSION_ATLEAST (5,10,0)
477 New(54,PL_retstack,8,OP*); 610 New(54,PL_retstack,4,OP*);
478 PL_retstack_ix = 0; 611 PL_retstack_ix = 0;
479 PL_retstack_max = 8; 612 PL_retstack_max = 4;
480#endif 613#endif
481
482 UNLOCK;
483} 614}
615#endif
484 616
485/* 617/*
486 * destroy the stacks, the callchain etc... 618 * destroy the stacks, the callchain etc...
487 */ 619 */
488static void 620static void
489destroy_stacks(pTHX) 621coro_destroy_stacks (pTHX)
490{ 622{
491 if (!IN_DESTRUCT)
492 {
493 /* is this ugly, I ask? */
494 LEAVE_SCOPE (0);
495
496 /* sure it is, but more important: is it correct?? :/ */
497 FREETMPS;
498
499 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
500 }
501
502 while (PL_curstackinfo->si_next) 623 while (PL_curstackinfo->si_next)
503 PL_curstackinfo = PL_curstackinfo->si_next; 624 PL_curstackinfo = PL_curstackinfo->si_next;
504 625
505 while (PL_curstackinfo) 626 while (PL_curstackinfo)
506 { 627 {
507 PERL_SI *p = PL_curstackinfo->si_prev; 628 PERL_SI *p = PL_curstackinfo->si_prev;
508 629
509 { /*D*//*remove*/
510 dSP;
511 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512 PUTBACK; /* possibly superfluous */
513 }
514
515 if (!IN_DESTRUCT) 630 if (!IN_DESTRUCT)
516 {
517 dounwind (-1);/*D*//*remove*/
518 SvREFCNT_dec (PL_curstackinfo->si_stack); 631 SvREFCNT_dec (PL_curstackinfo->si_stack);
519 }
520 632
521 Safefree (PL_curstackinfo->si_cxstack); 633 Safefree (PL_curstackinfo->si_cxstack);
522 Safefree (PL_curstackinfo); 634 Safefree (PL_curstackinfo);
523 PL_curstackinfo = p; 635 PL_curstackinfo = p;
524 } 636 }
525 637
526 Safefree (PL_tmps_stack); 638 Safefree (PL_tmps_stack);
527 Safefree (PL_markstack); 639 Safefree (PL_markstack);
528 Safefree (PL_scopestack); 640 Safefree (PL_scopestack);
529 Safefree (PL_savestack); 641 Safefree (PL_savestack);
530#if PERL_VERSION < 9 642#if !PERL_VERSION_ATLEAST (5,10,0)
531 Safefree (PL_retstack); 643 Safefree (PL_retstack);
532#endif 644#endif
533} 645}
534 646
535static void 647static size_t
536allocate_stack (Coro__State ctx, int alloc) 648coro_rss (pTHX_ struct coro *coro)
537{ 649{
538 coro_stack *stack; 650 size_t rss = sizeof (*coro);
539 651
540 New (0, stack, 1, coro_stack); 652 if (coro->mainstack)
541
542 stack->refcnt = 1;
543 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0;
545
546 if (alloc)
547 { 653 {
548#if HAVE_MMAP 654 perl_slots tmp_slot;
549 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 655 perl_slots *slot;
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 656
551 if (stack->sptr != (void *)-1) 657 if (coro->flags & CF_RUNNING)
552 { 658 {
553# if STACKGUARD 659 slot = &tmp_slot;
554 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 660
555# endif 661 #define VAR(name,type) slot->name = PL_ ## name;
662 # include "state.h"
663 #undef VAR
556 } 664 }
557 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 *);
558#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)
559 { 719 {
560 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 720 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
561 New (0, stack->sptr, STACKSIZE, long); 721 return 0;
562 } 722 }
563 } 723 }
564 else
565 stack->sptr = 0;
566 724
567 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;
568} 774}
569 775
570static void 776static void
571deallocate_stack (Coro__State ctx) 777coro_setup (pTHX_ struct coro *coro)
572{
573 coro_stack *stack = ctx->stack;
574
575 ctx->stack = 0;
576
577 if (stack)
578 {
579 if (!--stack->refcnt)
580 {
581#ifdef HAVE_MMAP
582 if (stack->ssize > 0 && stack->sptr)
583 munmap (stack->sptr, stack->ssize);
584 else
585#endif
586 Safefree (stack->sptr);
587
588 Safefree (stack);
589 }
590 else if (ctx->gencnt == stack->gencnt)
591 --stack->usecnt;
592 }
593}
594
595static void
596setup_coro (void *arg)
597{ 778{
598 /* 779 /*
599 * emulate part of the perl startup here. 780 * emulate part of the perl startup here.
600 */ 781 */
601 dTHX;
602 dSP;
603 Coro__State ctx = (Coro__State)arg;
604 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605
606 coro_init_stacks (aTHX); 782 coro_init_stacks (aTHX);
607 /*PL_curcop = 0;*/ 783
608 /*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));
609 SvREFCNT_dec (GvAV (PL_defgv)); 853 SvREFCNT_dec (GvAV (PL_defgv));
610 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));
611 858
612 SPAGAIN; 859 SvREFCNT_dec (PL_diehook);
860 SvREFCNT_dec (PL_warnhook);
861
862 SvREFCNT_dec (coro->saved_deffh);
863 SvREFCNT_dec (coro->throw);
613 864
614 if (ctx->stack) 865 coro_destroy_stacks (aTHX);
615 {
616 ctx->cursp = 0;
617
618 PUSHMARK(SP);
619 PUTBACK;
620 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
621
622 if (SvTRUE (ERRSV))
623 croak (NULL);
624 else
625 croak ("FATAL: CCTXT coroutine returned!");
626 }
627 else
628 {
629 UNOP myop;
630
631 Zero(&myop, 1, UNOP);
632 myop.op_next = Nullop;
633 myop.op_flags = OPf_WANT_VOID;
634
635 PL_op = (OP *)&myop;
636
637 PUSHMARK(SP);
638 XPUSHs (sub_init);
639 /*
640 * the next line is slightly wrong, as PL_op->op_next
641 * is actually being executed so we skip the first op.
642 * that doesn't matter, though, since it is only
643 * pp_nextstate and we never return...
644 * ah yes, and I don't care anyways ;)
645 */
646 PUTBACK;
647 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648 SPAGAIN;
649
650 ENTER; /* necessary e.g. for dounwind */
651 }
652} 866}
653 867
654static void 868static void
655continue_coro (void *arg) 869free_coro_mortal (pTHX)
656{ 870{
657 /* 871 if (expect_true (coro_mortal))
658 * this is a _very_ stripped down perl interpreter ;) 872 {
659 */ 873 SvREFCNT_dec (coro_mortal);
660 dTHX; 874 coro_mortal = 0;
661 Coro__State ctx = (Coro__State)arg;
662
663 PL_top_env = &PL_start_env;
664
665 ctx->cursp = 0;
666 PL_op = PL_op->op_next;
667 CALLRUNOPS(aTHX);
668
669 abort ();
670}
671
672static void
673transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
674{
675 dSTACKLEVEL;
676
677 if (prev != next)
678 { 875 }
679 /* has this coro been created yet? */ 876}
680 if (next->mainstack) 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)
681 { 891 {
682 LOCK; 892 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
683 SAVE (prev, flags);
684 LOAD (next);
685 UNLOCK;
686
687 /* mark this state as in-use */
688 next->mainstack = 0;
689 next->tmps_ix = -2;
690
691 /* stacklevel changed? if yes, grab the stack for us! */
692 if (flags & TRANSFER_SAVE_CCTXT)
693 { 893 {
694 if (!prev->stack) 894 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
695 allocate_stack (prev, 0); 895 SV **bot, **top;
696 else if (prev->cursp != stacklevel 896 AV *av = newAV (); /* return values */
697 && 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)
698 { 936 {
699 prev->gencnt = ++prev->stack->gencnt; 937 SV **cb;
700 prev->stack->usecnt = 1;
701 }
702 938
703 /* has our stack been invalidated? */ 939 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
704 if (next->stack && next->stack->gencnt != next->gencnt)
705 { 940 {
706 deallocate_stack (next); 941 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
707 allocate_stack (next, 1); 942
708 coro_create (&(next->stack->cctx), 943 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
709 continue_coro, (void *)next, 944 {
710 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;
711 } 971 }
712 972
713 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 973 if (cctx->flags & CC_TRACE_LINE)
714 prev->cursp = stacklevel;
715 /* don't add any code here */
716 }
717 else
718 next->cursp = stacklevel;
719 }
720 else if (next->tmps_ix == -2)
721 croak ("tried to transfer to running coroutine");
722 else
723 {
724 LOCK;
725 SAVE (prev, -1); /* first get rid of the old state */
726 UNLOCK;
727
728 /* create the coroutine for the first time */
729 if (flags & TRANSFER_SAVE_CCTXT)
730 {
731 if (!prev->stack)
732 allocate_stack (prev, 0);
733
734 /* the new coroutine starts with start_env again */
735 PL_top_env = &PL_start_env;
736
737 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
738 { 974 {
739 setup_coro (next); 975 dSP;
740 next->cursp = stacklevel;
741 976
742 prev->stack->refcnt++; 977 PL_runops = RUNOPS_DEFAULT;
743 prev->stack->usecnt++; 978 ENTER;
744 next->stack = prev->stack; 979 SAVETMPS;
745 next->gencnt = prev->gencnt; 980 EXTEND (SP, 3);
981 PL_runops = RUNOPS_DEFAULT;
982 PUSHMARK (SP);
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;
746 } 992 }
747 else
748 {
749 assert (!next->stack);
750 allocate_stack (next, 1);
751 coro_create (&(next->stack->cctx),
752 setup_coro, (void *)next,
753 next->stack->sptr, labs (next->stack->ssize));
754 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755 prev->cursp = stacklevel;
756 /* don't add any code here */
757 } 993 }
758 } 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 }
759 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)
760 { 1281 {
1282 SV *exception = coro->throw;
1283 coro->throw = 0;
1284 sv_setsv (ERRSV, exception);
761 setup_coro (next); 1285 croak (0);
762 next->cursp = stacklevel;
763 } 1286 }
764 } 1287 }
765 } 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;
766 1440
767 LOCK; 1441 LOCK;
768 if (coro_mortal) 1442
769 { 1443 sv_hook = coro_nready ? 0 : coro_readyhook;
770 SvREFCNT_dec (coro_mortal); 1444 xs_hook = coro_nready ? 0 : coroapi.readyhook;
771 coro_mortal = 0; 1445
772 } 1446 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1447 ++coro_nready;
1448
773 UNLOCK; 1449 UNLOCK;
774} 1450
1451 if (sv_hook)
1452 {
1453 dSP;
775 1454
776#define SV_CORO(sv,func) \ 1455 ENTER;
777 do { \ 1456 SAVETMPS;
778 if (SvROK (sv)) \
779 sv = SvRV (sv); \
780 \
781 if (SvTYPE (sv) == SVt_PVHV) \
782 { \
783 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784 \
785 if (!he) \
786 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787 \
788 (sv) = SvRV (HeVAL(he)); \
789 } \
790 \
791 /* must also be changed inside Coro::Cont::yield */ \
792 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794 \
795 } while(0)
796 1457
797#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (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}
798 1479
799static void 1480static void
800api_transfer(pTHX_ SV *prev, SV *next, int flags) 1481prepare_schedule (pTHX_ struct transfer_args *ta)
801{ 1482{
802 SV_CORO (prev, "Coro::transfer"); 1483 SV *prev_sv, *next_sv;
803 SV_CORO (next, "Coro::transfer");
804 1484
805 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1485 for (;;)
806} 1486 {
1487 LOCK;
1488 next_sv = coro_deq (aTHX);
807 1489
808/** Coro ********************************************************************/ 1490 /* nothing to schedule: call the idle handler */
1491 if (expect_false (!next_sv))
1492 {
1493 dSP;
1494 UNLOCK;
809 1495
810#define PRIO_MAX 3 1496 ENTER;
811#define PRIO_HIGH 1 1497 SAVETMPS;
812#define PRIO_NORMAL 0
813#define PRIO_LOW -1
814#define PRIO_IDLE -3
815#define PRIO_MIN -4
816 1498
817/* for Coro.pm */ 1499 PUSHMARK (SP);
818static GV *coro_current, *coro_idle; 1500 PUTBACK;
819static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 1501 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
820static 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}
821 1538
822static void 1539static void
823coro_enq (pTHX_ SV *sv) 1540prepare_cede (pTHX_ struct transfer_args *ta)
824{ 1541{
825 SV **xprio; 1542 api_ready (coro_current);
826 int prio; 1543 prepare_schedule (aTHX_ ta);
1544}
827 1545
828 if (SvTYPE (sv) != SVt_PVHV) 1546static int
829 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1547prepare_cede_notself (pTHX_ struct transfer_args *ta)
830 1548{
831 xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834 prio = prio > PRIO_MAX ? PRIO_MAX
835 : prio < PRIO_MIN ? PRIO_MIN
836 : prio;
837
838 av_push (coro_ready [prio - PRIO_MIN], sv);
839 coro_nready++; 1549 if (coro_nready)
840}
841
842static SV *
843coro_deq (pTHX_ int min_prio)
844{
845 int prio = PRIO_MAX - PRIO_MIN;
846
847 min_prio -= PRIO_MIN;
848 if (min_prio < 0)
849 min_prio = 0;
850
851 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852 if (AvFILLp (coro_ready [prio]) >= 0)
853 { 1550 {
854 coro_nready--; 1551 SV *prev = SvRV (coro_current);
855 return av_shift (coro_ready [prio]); 1552 prepare_schedule (aTHX_ ta);
1553 api_ready (prev);
1554 return 1;
856 } 1555 }
857 1556 else
858 return 0; 1557 return 0;
859}
860
861static void
862api_ready (SV *coro)
863{
864 dTHX;
865
866 if (SvROK (coro))
867 coro = SvRV (coro);
868
869 LOCK;
870 coro_enq (aTHX_ SvREFCNT_inc (coro));
871 UNLOCK;
872} 1558}
873 1559
874static void 1560static void
875api_schedule (void) 1561api_schedule (void)
876{ 1562{
877 dTHX; 1563 dTHX;
1564 struct transfer_args ta;
878 1565
879 SV *prev, *next; 1566 prepare_schedule (aTHX_ &ta);
1567 TRANSFER (ta, 1);
1568}
880 1569
881 LOCK; 1570static int
1571api_cede (void)
1572{
1573 dTHX;
1574 struct transfer_args ta;
882 1575
883 prev = SvRV (GvSV (coro_current)); 1576 prepare_cede (aTHX_ &ta);
884 next = coro_deq (aTHX_ PRIO_MIN);
885 1577
886 if (!next) 1578 if (expect_true (ta.prev != ta.next))
887 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1579 {
1580 TRANSFER (ta, 1);
1581 return 1;
1582 }
1583 else
1584 return 0;
1585}
888 1586
889 /* free this only after the transfer */ 1587static int
890 coro_mortal = prev; 1588api_cede_notself (void)
891 SV_CORO (prev, "Coro::schedule"); 1589{
1590 dTHX;
1591 struct transfer_args ta;
892 1592
893 SvRV (GvSV (coro_current)) = next; 1593 if (prepare_cede_notself (aTHX_ &ta))
894 1594 {
895 SV_CORO (next, "Coro::schedule"); 1595 TRANSFER (ta, 1);
896 1596 return 1;
897 UNLOCK; 1597 }
898 1598 else
899 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1599 return 0;
900 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901} 1600}
902 1601
903static void 1602static void
904api_cede (void) 1603api_trace (SV *coro_sv, int flags)
905{ 1604{
906 dTHX; 1605 dTHX;
1606 struct coro *coro = SvSTATE (coro_sv);
907 1607
908 LOCK; 1608 if (flags & CC_TRACE)
909 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1609 {
910 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");
911 1614
912 api_schedule (); 1615 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
913} 1616 }
1617 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1618 {
1619 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
914 1620
1621 if (coro->flags & CF_RUNNING)
1622 PL_runops = RUNOPS_DEFAULT;
1623 else
1624 coro->slot->runops = RUNOPS_DEFAULT;
1625 }
1626}
1627
1628static int
1629coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1630{
1631 AV *padlist;
1632 AV *av = (AV *)mg->mg_obj;
1633
1634 abort ();
1635
1636 return 0;
1637}
1638
1639static MGVTBL coro_gensub_vtbl = {
1640 0, 0, 0, 0,
1641 coro_gensub_free
1642};
1643
915MODULE = Coro::State PACKAGE = Coro::State 1644MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916 1645
917PROTOTYPES: ENABLE 1646PROTOTYPES: DISABLE
918 1647
919BOOT: 1648BOOT:
920{ /* {} necessary for stoopid perl-5.6.x */ 1649{
921#ifdef USE_ITHREADS 1650#ifdef USE_ITHREADS
922 MUTEX_INIT (&coro_mutex); 1651 MUTEX_INIT (&coro_mutex);
923#endif 1652#endif
924 BOOT_PAGESIZE; 1653 BOOT_PAGESIZE;
925 1654
926 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1655 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
927 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1656 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1657
1658 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1659 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1660 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1661
1662 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1663 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1664 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1665
928 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1666 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929 1667
930 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1668 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1669 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1670 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1671 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934 1672
935 main_mainstack = PL_mainstack; 1673 main_mainstack = PL_mainstack;
1674 main_top_env = PL_top_env;
936 1675
1676 while (main_top_env->je_prev)
1677 main_top_env = main_top_env->je_prev;
1678
937 coroapi.ver = CORO_API_VERSION; 1679 coroapi.ver = CORO_API_VERSION;
1680 coroapi.rev = CORO_API_REVISION;
938 coroapi.transfer = api_transfer; 1681 coroapi.transfer = api_transfer;
939}
940 1682
941Coro::State 1683 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942_newprocess(args) 1684}
943 SV * args 1685
944 PROTOTYPE: $ 1686SV *
1687new (char *klass, ...)
945 CODE: 1688 CODE:
946 Coro__State coro; 1689{
1690 struct coro *coro;
1691 MAGIC *mg;
1692 HV *hv;
1693 int i;
947 1694
948 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949 croak ("Coro::State::_newprocess expects an arrayref");
950
951 Newz (0, coro, 1, struct coro); 1695 Newz (0, coro, 1, struct coro);
1696 coro->args = newAV ();
1697 coro->flags = CF_NEW;
952 1698
953 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1699 if (coro_first) coro_first->prev = coro;
954 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1700 coro->next = coro_first;
955 /*coro->stack = 0;*/ 1701 coro_first = coro;
956 1702
957 RETVAL = coro; 1703 coro->hv = hv = newHV ();
1704 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1705 mg->mg_flags |= MGf_DUP;
1706 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1707
1708 av_extend (coro->args, items - 1);
1709 for (i = 1; i < items; i++)
1710 av_push (coro->args, newSVsv (ST (i)));
1711}
958 OUTPUT: 1712 OUTPUT:
959 RETVAL 1713 RETVAL
960 1714
1715# these not obviously related functions are all rolled into the same xs
1716# function to increase chances that they all will call transfer with the same
1717# stack offset
961void 1718void
962transfer(prev, next, flags) 1719_set_stacklevel (...)
963 SV *prev 1720 ALIAS:
964 SV *next 1721 Coro::State::transfer = 1
965 int flags 1722 Coro::schedule = 2
966 PROTOTYPE: @ 1723 Coro::cede = 3
1724 Coro::cede_notself = 4
967 CODE: 1725 CODE:
1726{
1727 struct transfer_args ta;
1728
968 PUTBACK; 1729 PUTBACK;
969 SV_CORO (next, "Coro::transfer"); 1730 switch (ix)
970 SV_CORO (prev, "Coro::transfer"); 1731 {
971 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1732 case 0:
1733 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1734 ta.next = 0;
1735 break;
1736
1737 case 1:
1738 if (items != 2)
1739 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1740
1741 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1742 break;
1743
1744 case 2:
1745 prepare_schedule (aTHX_ &ta);
1746 break;
1747
1748 case 3:
1749 prepare_cede (aTHX_ &ta);
1750 break;
1751
1752 case 4:
1753 if (!prepare_cede_notself (aTHX_ &ta))
1754 XSRETURN_EMPTY;
1755
1756 break;
1757 }
972 SPAGAIN; 1758 SPAGAIN;
973 1759
1760 BARRIER;
1761 PUTBACK;
1762 TRANSFER (ta, 0);
1763 SPAGAIN; /* might be the sp of a different coroutine now */
1764 /* be extra careful not to ever do anything after TRANSFER */
1765}
1766
1767bool
1768_destroy (SV *coro_sv)
1769 CODE:
1770 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1771 OUTPUT:
1772 RETVAL
1773
974void 1774void
975DESTROY(coro)
976 Coro::State coro
977 CODE:
978
979 if (coro->mainstack && coro->mainstack != main_mainstack)
980 {
981 struct coro temp;
982
983 PUTBACK;
984 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
985 LOAD (aTHX_ coro);
986 SPAGAIN;
987
988 destroy_stacks (aTHX);
989
990 LOAD ((&temp)); /* this will get rid of defsv etc.. */
991 SPAGAIN;
992
993 coro->mainstack = 0;
994 }
995
996 deallocate_stack (coro);
997 SvREFCNT_dec (coro->args);
998 Safefree (coro);
999
1000void
1001_exit(code) 1775_exit (int code)
1002 int code
1003 PROTOTYPE: $ 1776 PROTOTYPE: $
1004 CODE: 1777 CODE:
1005 _exit (code); 1778 _exit (code);
1006 1779
1007MODULE = Coro::State PACKAGE = Coro::Cont 1780int
1781cctx_stacksize (int new_stacksize = 0)
1782 CODE:
1783 RETVAL = coro_stacksize;
1784 if (new_stacksize)
1785 coro_stacksize = new_stacksize;
1786 OUTPUT:
1787 RETVAL
1788
1789int
1790cctx_count ()
1791 CODE:
1792 RETVAL = cctx_count;
1793 OUTPUT:
1794 RETVAL
1795
1796int
1797cctx_idle ()
1798 CODE:
1799 RETVAL = cctx_idle;
1800 OUTPUT:
1801 RETVAL
1008 1802
1009void 1803void
1010yield(...) 1804list ()
1011 PROTOTYPE: @ 1805 PPCODE:
1806{
1807 struct coro *coro;
1808 for (coro = coro_first; coro; coro = coro->next)
1809 if (coro->hv)
1810 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1811}
1812
1813void
1814call (Coro::State coro, SV *coderef)
1815 ALIAS:
1816 eval = 1
1817 CODE:
1818{
1819 if (coro->mainstack)
1820 {
1821 struct coro temp;
1822
1823 if (!(coro->flags & CF_RUNNING))
1824 {
1825 PUTBACK;
1826 save_perl (aTHX_ &temp);
1827 load_perl (aTHX_ coro);
1828 }
1829
1830 {
1831 dSP;
1832 ENTER;
1833 SAVETMPS;
1834 PUTBACK;
1835 PUSHSTACK;
1836 PUSHMARK (SP);
1837
1838 if (ix)
1839 eval_sv (coderef, 0);
1840 else
1841 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1842
1843 POPSTACK;
1844 SPAGAIN;
1845 FREETMPS;
1846 LEAVE;
1847 PUTBACK;
1848 }
1849
1850 if (!(coro->flags & CF_RUNNING))
1851 {
1852 save_perl (aTHX_ coro);
1853 load_perl (aTHX_ &temp);
1854 SPAGAIN;
1855 }
1856 }
1857}
1858
1859SV *
1860is_ready (Coro::State coro)
1861 PROTOTYPE: $
1862 ALIAS:
1863 is_ready = CF_READY
1864 is_running = CF_RUNNING
1865 is_new = CF_NEW
1866 is_destroyed = CF_DESTROYED
1867 CODE:
1868 RETVAL = boolSV (coro->flags & ix);
1869 OUTPUT:
1870 RETVAL
1871
1872void
1873api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1874
1875SV *
1876has_cctx (Coro::State coro)
1877 PROTOTYPE: $
1878 CODE:
1879 RETVAL = boolSV (!!coro->cctx);
1880 OUTPUT:
1881 RETVAL
1882
1883int
1884is_traced (Coro::State coro)
1885 PROTOTYPE: $
1886 CODE:
1887 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1888 OUTPUT:
1889 RETVAL
1890
1891IV
1892rss (Coro::State coro)
1893 PROTOTYPE: $
1894 ALIAS:
1895 usecount = 1
1012 CODE: 1896 CODE:
1013 SV *yieldstack; 1897 switch (ix)
1014 SV *sv; 1898 {
1015 AV *defav = GvAV (PL_defgv); 1899 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1016 struct coro *prev, *next; 1900 case 1: RETVAL = coro->usecount; break;
1017
1018 yieldstack = *hv_fetch (
1019 (HV *)SvRV (GvSV (coro_current)),
1020 "yieldstack", sizeof ("yieldstack") - 1,
1021 0 1901 }
1022 ); 1902 OUTPUT:
1903 RETVAL
1023 1904
1024 /* set up @_ -- ugly */ 1905void
1025 av_clear (defav); 1906force_cctx ()
1026 av_fill (defav, items - 1); 1907 CODE:
1027 while (items--) 1908 struct coro *coro = SvSTATE (coro_current);
1028 av_store (defav, items, SvREFCNT_inc (ST(items))); 1909 coro->cctx->idle_sp = 0;
1029 1910
1030 sv = av_pop ((AV *)SvRV (yieldstack)); 1911void
1031 prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 1912throw (Coro::State self, SV *throw = &PL_sv_undef)
1032 next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 1913 PROTOTYPE: $;$
1914 CODE:
1033 SvREFCNT_dec (sv); 1915 SvREFCNT_dec (self->throw);
1916 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1034 1917
1035 transfer (aTHX_ prev, next, 0); 1918void
1919swap_defsv (Coro::State self)
1920 PROTOTYPE: $
1921 ALIAS:
1922 swap_defav = 1
1923 CODE:
1924 if (!self->slot)
1925 croak ("cannot swap state with coroutine that has no saved state");
1926 else
1927 {
1928 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1929 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1930
1931 SV *tmp = *src; *src = *dst; *dst = tmp;
1932 }
1036 1933
1037MODULE = Coro::State PACKAGE = Coro 1934MODULE = Coro::State PACKAGE = Coro
1038 1935
1039BOOT: 1936BOOT:
1040{ 1937{
1041 int i; 1938 int i;
1939
1940 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1941 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1942 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1943
1944 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1945 SvREADONLY_on (coro_current);
1946
1042 HV *stash = gv_stashpv ("Coro", TRUE); 1947 coro_stash = gv_stashpv ("Coro", TRUE);
1043 1948
1044 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1949 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1950 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1951 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1952 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1953 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1954 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050
1051 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053 1955
1054 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1956 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055 coro_ready[i] = newAV (); 1957 coro_ready[i] = newAV ();
1056 1958
1057 { 1959 {
1058 SV *sv = perl_get_sv("Coro::API", 1); 1960 SV *sv = perl_get_sv ("Coro::API", TRUE);
1961 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1059 1962
1060 coroapi.schedule = api_schedule; 1963 coroapi.schedule = api_schedule;
1061 coroapi.cede = api_cede; 1964 coroapi.cede = api_cede;
1965 coroapi.cede_notself = api_cede_notself;
1062 coroapi.ready = api_ready; 1966 coroapi.ready = api_ready;
1967 coroapi.is_ready = api_is_ready;
1063 coroapi.nready = &coro_nready; 1968 coroapi.nready = &coro_nready;
1064 coroapi.current = coro_current; 1969 coroapi.current = coro_current;
1065 1970
1066 GCoroAPI = &coroapi; 1971 GCoroAPI = &coroapi;
1067 sv_setiv (sv, (IV)&coroapi); 1972 sv_setiv (sv, (IV)&coroapi);
1068 SvREADONLY_on (sv); 1973 SvREADONLY_on (sv);
1069 } 1974 }
1070} 1975}
1071 1976
1072#if !PERL_MICRO
1073
1074void 1977void
1075ready(self) 1978_set_current (SV *current)
1076 SV * self
1077 PROTOTYPE: $ 1979 PROTOTYPE: $
1078 CODE: 1980 CODE:
1079 api_ready (self); 1981 SvREFCNT_dec (SvRV (coro_current));
1982 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1080 1983
1081#endif 1984void
1985_set_readyhook (SV *hook)
1986 PROTOTYPE: $
1987 CODE:
1988 LOCK;
1989 SvREFCNT_dec (coro_readyhook);
1990 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1991 UNLOCK;
1082 1992
1083int 1993int
1994prio (Coro::State coro, int newprio = 0)
1995 ALIAS:
1996 nice = 1
1997 CODE:
1998{
1999 RETVAL = coro->prio;
2000
2001 if (items > 1)
2002 {
2003 if (ix)
2004 newprio = coro->prio - newprio;
2005
2006 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2007 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2008
2009 coro->prio = newprio;
2010 }
2011}
2012 OUTPUT:
2013 RETVAL
2014
2015SV *
2016ready (SV *self)
2017 PROTOTYPE: $
2018 CODE:
2019 RETVAL = boolSV (api_ready (self));
2020 OUTPUT:
2021 RETVAL
2022
2023int
1084nready(...) 2024nready (...)
1085 PROTOTYPE: 2025 PROTOTYPE:
1086 CODE: 2026 CODE:
1087 RETVAL = coro_nready; 2027 RETVAL = coro_nready;
1088 OUTPUT: 2028 OUTPUT:
1089 RETVAL 2029 RETVAL
1090 2030
2031# for async_pool speedup
1091void 2032void
1092schedule(...) 2033_pool_1 (SV *cb)
1093 PROTOTYPE:
1094 CODE: 2034 CODE:
1095 api_schedule (); 2035{
2036 struct coro *coro = SvSTATE (coro_current);
2037 HV *hv = (HV *)SvRV (coro_current);
2038 AV *defav = GvAV (PL_defgv);
2039 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2040 AV *invoke_av;
2041 int i, len;
2042
2043 if (!invoke)
2044 {
2045 SV *old = PL_diehook;
2046 PL_diehook = 0;
2047 SvREFCNT_dec (old);
2048 croak ("\3async_pool terminate\2\n");
2049 }
2050
2051 SvREFCNT_dec (coro->saved_deffh);
2052 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2053
2054 hv_store (hv, "desc", sizeof ("desc") - 1,
2055 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2056
2057 invoke_av = (AV *)SvRV (invoke);
2058 len = av_len (invoke_av);
2059
2060 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2061
2062 if (len > 0)
2063 {
2064 av_fill (defav, len - 1);
2065 for (i = 0; i < len; ++i)
2066 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2067 }
2068
2069 SvREFCNT_dec (invoke);
2070}
1096 2071
1097void 2072void
1098cede(...) 2073_pool_2 (SV *cb)
1099 PROTOTYPE:
1100 CODE: 2074 CODE:
1101 api_cede (); 2075{
2076 struct coro *coro = SvSTATE (coro_current);
1102 2077
1103# and these are hacks 2078 sv_setsv (cb, &PL_sv_undef);
2079
2080 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2081 coro->saved_deffh = 0;
2082
2083 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2084 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2085 {
2086 SV *old = PL_diehook;
2087 PL_diehook = 0;
2088 SvREFCNT_dec (old);
2089 croak ("\3async_pool terminate\2\n");
2090 }
2091
2092 av_clear (GvAV (PL_defgv));
2093 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2094 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2095
2096 coro->prio = 0;
2097
2098 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2099 api_trace (coro_current, 0);
2100
2101 av_push (av_async_pool, newSVsv (coro_current));
2102}
2103
2104#if 0
2105
2106void
2107_generator_call (...)
2108 PROTOTYPE: @
2109 PPCODE:
2110 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2111 xxxx
2112 abort ();
2113
1104SV * 2114SV *
1105_aio_get_state () 2115gensub (SV *sub, ...)
1106 CODE: 2116 PROTOTYPE: &;@
2117 CODE:
1107{ 2118{
1108 struct { 2119 struct coro *coro;
1109 int errorno; 2120 MAGIC *mg;
1110 int laststype; 2121 CV *xcv;
1111 int laststatval; 2122 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1112 Stat_t statcache; 2123 int i;
1113 } data;
1114 2124
1115 data.errorno = errno; 2125 CvGV (ncv) = CvGV (cv);
1116 data.laststype = PL_laststype; 2126 CvFILE (ncv) = CvFILE (cv);
1117 data.laststatval = PL_laststatval;
1118 data.statcache = PL_statcache;
1119 2127
1120 RETVAL = newSVpvn ((char *)&data, sizeof data); 2128 Newz (0, coro, 1, struct coro);
2129 coro->args = newAV ();
2130 coro->flags = CF_NEW;
2131
2132 av_extend (coro->args, items - 1);
2133 for (i = 1; i < items; i++)
2134 av_push (coro->args, newSVsv (ST (i)));
2135
2136 CvISXSUB_on (ncv);
2137 CvXSUBANY (ncv).any_ptr = (void *)coro;
2138
2139 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2140
2141 CvXSUB (ncv) = CvXSUB (xcv);
2142 CvANON_on (ncv);
2143
2144 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2145 RETVAL = newRV_noinc ((SV *)ncv);
1121} 2146}
1122 OUTPUT: 2147 OUTPUT:
1123 RETVAL 2148 RETVAL
1124 2149
2150#endif
2151
2152
2153MODULE = Coro::State PACKAGE = Coro::AIO
2154
2155SV *
2156_get_state ()
2157 CODE:
2158{
2159 struct io_state *data;
2160
2161 RETVAL = newSV (sizeof (struct io_state));
2162 data = (struct io_state *)SvPVX (RETVAL);
2163 SvCUR_set (RETVAL, sizeof (struct io_state));
2164 SvPOK_only (RETVAL);
2165
2166 data->errorno = errno;
2167 data->laststype = PL_laststype;
2168 data->laststatval = PL_laststatval;
2169 data->statcache = PL_statcache;
2170}
2171 OUTPUT:
2172 RETVAL
2173
1125void 2174void
1126_aio_set_state (char *data_) 2175_set_state (char *data_)
1127 PROTOTYPE: $ 2176 PROTOTYPE: $
1128 CODE: 2177 CODE:
1129{ 2178{
1130 struct { 2179 struct io_state *data = (void *)data_;
1131 int errorno;
1132 int laststype;
1133 int laststatval;
1134 Stat_t statcache;
1135 } *data = (void *)data_;
1136 2180
1137 errno = data->errorno; 2181 errno = data->errorno;
1138 PL_laststype = data->laststype; 2182 PL_laststype = data->laststype;
1139 PL_laststatval = data->laststatval; 2183 PL_laststatval = data->laststatval;
1140 PL_statcache = data->statcache; 2184 PL_statcache = data->statcache;
1141} 2185}
2186
2187
2188MODULE = Coro::State PACKAGE = Coro::AnyEvent
2189
2190BOOT:
2191 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2192
2193SV *
2194_schedule (...)
2195 PROTOTYPE: @
2196 CODE:
2197{
2198 static int incede;
2199
2200 api_cede_notself ();
2201
2202 ++incede;
2203 while (coro_nready >= incede && api_cede ())
2204 ;
2205
2206 sv_setsv (sv_activity, &PL_sv_undef);
2207 if (coro_nready >= incede)
2208 {
2209 PUSHMARK (SP);
2210 PUTBACK;
2211 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2212 SPAGAIN;
2213 }
2214
2215 --incede;
2216}
2217

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