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Comparing Coro/Coro/State.xs (file contents):
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC vs.
Revision 1.255 by root, Sat Nov 8 04:52:01 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"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57static int cctx_max_idle = 4;
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 66# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 67# define PL_ppaddr ppaddr
14# endif 68# endif
15# ifndef call_sv 69# ifndef call_sv
16# define call_sv perl_call_sv 70# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 81# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
29# endif 83# endif
30#endif 84#endif
31 85
32#include <stdio.h> 86/* 5.11 */
33#include <errno.h> 87#ifndef CxHASARGS
88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
89#endif
90
91/* 5.10.0 */
92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
95
96/* 5.8.8 */
97#ifndef GV_NOTQUAL
98# define GV_NOTQUAL 0
99#endif
100#ifndef newSV
101# define newSV(l) NEWSV(0,l)
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
34 108
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD 110# undef CORO_STACKGUARD
37#endif
38
39#ifndef STACKGUARD
40# define STACKGUARD 0
41#endif
42
43#ifdef HAVE_MMAP
44# include <unistd.h>
45# include <sys/mman.h>
46# ifndef MAP_ANONYMOUS
47# ifdef MAP_ANON
48# define MAP_ANONYMOUS MAP_ANON
49# else
50# undef HAVE_MMAP
51# endif
52# endif 111#endif
53# include <limits.h> 112
54# ifndef PAGESIZE 113#ifndef CORO_STACKGUARD
55# define PAGESIZE pagesize 114# define CORO_STACKGUARD 0
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize;
58# else
59# define BOOT_PAGESIZE
60# endif 115#endif
61#endif
62 116
63/* The next macro should declare a variable stacklevel that contains and approximation 117/* prefer perl internal functions over our own? */
64 * to the current C stack pointer. Its property is that it changes with each call 118#ifndef CORO_PREFER_PERL_FUNCTIONS
65 * and should be unique. */ 119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
66#define dSTACKLEVEL int stacklevel 124#define dSTACKLEVEL volatile char stacklevel
67#define STACKLEVEL ((void *)&stacklevel) 125#define STACKLEVEL ((void *)&stacklevel)
68 126
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
70 128
71#define labs(l) ((l) >= 0 ? (l) : -(l)) 129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
133#else
134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
72 143
73#include "CoroAPI.h" 144#include "CoroAPI.h"
74 145
75#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76
77#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
78static perl_mutex coro_mutex; 147static perl_mutex coro_lock;
79# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
80# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 149# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
81#else 150#else
82# define LOCK (void)0 151# define LOCK (void)0
83# define UNLOCK (void)0 152# define UNLOCK (void)0
84#endif 153#endif
85 154
155/* helper storage struct for Coro::AIO */
156struct io_state
157{
158 AV *res;
159 int errorno;
160 I32 laststype; /* U16 in 5.10.0 */
161 int laststatval;
162 Stat_t statcache;
163};
164
165static double (*nvtime)(); /* so why doesn't it take void? */
166
167static U32 cctx_gen;
168static size_t cctx_stacksize = CORO_STACKSIZE;
86static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
87static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env;
88static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
89static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
174
175static GV *irsgv; /* $/ */
176static GV *stdoutgv; /* *STDOUT */
177static SV *rv_diehook;
178static SV *rv_warnhook;
179static HV *hv_sig; /* %SIG */
180
181/* async_pool helper stuff */
182static SV *sv_pool_rss;
183static SV *sv_pool_size;
184static AV *av_async_pool;
185
186/* Coro::AnyEvent */
187static SV *sv_activity;
188
189static struct coro_cctx *cctx_first;
190static int cctx_count, cctx_idle;
191
192enum {
193 CC_MAPPED = 0x01,
194 CC_NOREUSE = 0x02, /* throw this away after tracing */
195 CC_TRACE = 0x04,
196 CC_TRACE_SUB = 0x08, /* trace sub calls */
197 CC_TRACE_LINE = 0x10, /* trace each statement */
198 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
199};
90 200
91/* this is a structure representing a c-level coroutine */ 201/* this is a structure representing a c-level coroutine */
92typedef struct coro_stack { 202typedef struct coro_cctx {
93 struct coro_stack *next; 203 struct coro_cctx *next;
94 204
95 /* the stack */ 205 /* the stack */
96 void *sptr; 206 void *sptr;
97 long ssize; /* positive == mmap, otherwise malloc */ 207 size_t ssize;
98 208
99 /* cpu state */ 209 /* cpu state */
100 void *idle_sp; /* original stacklevel when coroutine was created */ 210 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
211 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
101 JMPENV *top_env; 212 JMPENV *top_env;
102 coro_context cctx; 213 coro_context cctx;
103} coro_stack;
104 214
105/* the (fake) coro_stack representing the main program */ 215 U32 gen;
106static coro_stack *main_stack; 216#if CORO_USE_VALGRIND
217 int valgrind_id;
218#endif
219 unsigned char flags;
220} coro_cctx;
221
222enum {
223 CF_RUNNING = 0x0001, /* coroutine is running */
224 CF_READY = 0x0002, /* coroutine is ready */
225 CF_NEW = 0x0004, /* has never been switched to */
226 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
227};
228
229/* the structure where most of the perl state is stored, overlaid on the cxstack */
230typedef struct {
231 SV *defsv;
232 AV *defav;
233 SV *errsv;
234 SV *irsgv;
235#define VAR(name,type) type name;
236# include "state.h"
237#undef VAR
238} perl_slots;
239
240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
107 241
108/* this is a structure representing a perl-level coroutine */ 242/* this is a structure representing a perl-level coroutine */
109struct coro { 243struct coro {
110 /* the c coroutine allocated to this perl coroutine, if any */ 244 /* the c coroutine allocated to this perl coroutine, if any */
111 coro_stack *stack; 245 coro_cctx *cctx;
112 246
113 /* data associated with this coroutine (initial args) */ 247 /* process data */
114 AV *args;
115 int refcnt;
116
117 /* optionally saved, might be zero */
118 AV *defav;
119 SV *defsv;
120 SV *errsv;
121
122 /* saved global state not related to stacks */
123 U8 dowarn;
124 I32 in_eval;
125
126 /* the stacks and related info (callchain etc..) */
127 PERL_SI *curstackinfo;
128 AV *curstack;
129 AV *mainstack; 248 AV *mainstack;
130 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
131 OP *op; 250
132 SV **curpad; 251 AV *args; /* data associated with this coroutine (initial args) */
133 AV *comppad; 252 int refcnt; /* coroutines are refcounted, yes */
134 CV *compcv; 253 int flags; /* CF_ flags */
135 SV **stack_base; 254 HV *hv; /* the perl hash associated with this coro, if any */
136 SV **stack_max; 255
137 SV **tmps_stack; 256 /* statistics */
138 I32 tmps_floor; 257 int usecount; /* number of transfers to this coro */
139 I32 tmps_ix;
140 I32 tmps_max;
141 I32 *markstack;
142 I32 *markstack_ptr;
143 I32 *markstack_max;
144 I32 *scopestack;
145 I32 scopestack_ix;
146 I32 scopestack_max;
147 ANY *savestack;
148 I32 savestack_ix;
149 I32 savestack_max;
150 OP **retstack;
151 I32 retstack_ix;
152 I32 retstack_max;
153 PMOP *curpm;
154 COP *curcop;
155 258
156 /* coro process data */ 259 /* coro process data */
157 int prio; 260 int prio;
261 SV *throw; /* exception to be thrown */
262
263 /* async_pool */
264 SV *saved_deffh;
265
266 /* linked list */
267 struct coro *next, *prev;
158}; 268};
159 269
160typedef struct coro *Coro__State; 270typedef struct coro *Coro__State;
161typedef struct coro *Coro__State_or_hashref; 271typedef struct coro *Coro__State_or_hashref;
162 272
273/** Coro ********************************************************************/
274
275#define PRIO_MAX 3
276#define PRIO_HIGH 1
277#define PRIO_NORMAL 0
278#define PRIO_LOW -1
279#define PRIO_IDLE -3
280#define PRIO_MIN -4
281
282/* for Coro.pm */
283static SV *coro_current;
284static SV *coro_readyhook;
285static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
286static int coro_nready;
287static struct coro *coro_first;
288
289/** lowlevel stuff **********************************************************/
290
291static SV *
292coro_get_sv (pTHX_ const char *name, int create)
293{
294#if PERL_VERSION_ATLEAST (5,10,0)
295 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
296 get_sv (name, create);
297#endif
298 return get_sv (name, create);
299}
300
301static AV *
302coro_get_av (pTHX_ const char *name, int create)
303{
304#if PERL_VERSION_ATLEAST (5,10,0)
305 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
306 get_av (name, create);
307#endif
308 return get_av (name, create);
309}
310
311static HV *
312coro_get_hv (pTHX_ const char *name, int create)
313{
314#if PERL_VERSION_ATLEAST (5,10,0)
315 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
316 get_hv (name, create);
317#endif
318 return get_hv (name, create);
319}
320
163static AV * 321static AV *
164coro_clone_padlist (pTHX_ CV *cv) 322coro_clone_padlist (pTHX_ CV *cv)
165{ 323{
166 AV *padlist = CvPADLIST (cv); 324 AV *padlist = CvPADLIST (cv);
167 AV *newpadlist, *newpad; 325 AV *newpadlist, *newpad;
168 326
169 newpadlist = newAV (); 327 newpadlist = newAV ();
170 AvREAL_off (newpadlist); 328 AvREAL_off (newpadlist);
171#if PERL_VERSION < 9 329#if PERL_VERSION_ATLEAST (5,10,0)
330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
331#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 332 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173#else
174 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175#endif 333#endif
176 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 334 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177 --AvFILLp (padlist); 335 --AvFILLp (padlist);
178 336
179 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 337 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
180 av_store (newpadlist, 1, (SV *)newpad); 338 av_store (newpadlist, 1, (SV *)newpad);
181 339
182 return newpadlist; 340 return newpadlist;
183} 341}
184 342
… …
214 372
215 /* casting is fun. */ 373 /* casting is fun. */
216 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 374 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
217 free_padlist (aTHX_ padlist); 375 free_padlist (aTHX_ padlist);
218 376
219 SvREFCNT_dec (av); 377 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
220 378
221 return 0; 379 return 0;
222} 380}
223 381
224#define PERL_MAGIC_coro PERL_MAGIC_ext 382#define CORO_MAGIC_type_cv PERL_MAGIC_ext
383#define CORO_MAGIC_type_state PERL_MAGIC_ext
225 384
226static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 385static MGVTBL coro_cv_vtbl = {
386 0, 0, 0, 0,
387 coro_cv_free
388};
389
390#define CORO_MAGIC(sv, type) \
391 SvMAGIC (sv) \
392 ? SvMAGIC (sv)->mg_type == type \
393 ? SvMAGIC (sv) \
394 : mg_find (sv, type) \
395 : 0
396
397#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
398#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
399
400static struct coro *
401SvSTATE_ (pTHX_ SV *coro)
402{
403 HV *stash;
404 MAGIC *mg;
405
406 if (SvROK (coro))
407 coro = SvRV (coro);
408
409 if (expect_false (SvTYPE (coro) != SVt_PVHV))
410 croak ("Coro::State object required");
411
412 stash = SvSTASH (coro);
413 if (expect_false (stash != coro_stash && stash != coro_state_stash))
414 {
415 /* very slow, but rare, check */
416 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
417 croak ("Coro::State object required");
418 }
419
420 mg = CORO_MAGIC_state (coro);
421 return (struct coro *)mg->mg_ptr;
422}
423
424#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
227 425
228/* the next two functions merely cache the padlists */ 426/* the next two functions merely cache the padlists */
229static void 427static void
230get_padlist (pTHX_ CV *cv) 428get_padlist (pTHX_ CV *cv)
231{ 429{
232 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 430 MAGIC *mg = CORO_MAGIC_cv (cv);
431 AV *av;
233 432
234 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 433 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
235 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 434 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
236 else 435 else
237 { 436 {
238#if 0 437#if CORO_PREFER_PERL_FUNCTIONS
239 /* this should work - but it doesn't :( */ 438 /* this is probably cleaner? but also slower! */
439 /* in practise, it seems to be less stable */
240 CV *cp = Perl_cv_clone (aTHX_ cv); 440 CV *cp = Perl_cv_clone (cv);
241 CvPADLIST (cv) = CvPADLIST (cp); 441 CvPADLIST (cv) = CvPADLIST (cp);
242 CvPADLIST (cp) = 0; 442 CvPADLIST (cp) = 0;
243 SvREFCNT_dec (cp); 443 SvREFCNT_dec (cp);
244#else 444#else
245 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 445 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
248} 448}
249 449
250static void 450static void
251put_padlist (pTHX_ CV *cv) 451put_padlist (pTHX_ CV *cv)
252{ 452{
253 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 453 MAGIC *mg = CORO_MAGIC_cv (cv);
454 AV *av;
254 455
255 if (!mg) 456 if (expect_false (!mg))
256 { 457 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
257 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259 mg->mg_virtual = &vtbl_coro;
260 mg->mg_obj = (SV *)newAV ();
261 }
262 458
263 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 459 av = (AV *)mg->mg_obj;
264}
265 460
266#define SB do { 461 if (expect_false (AvFILLp (av) >= AvMAX (av)))
267#define SE } while (0) 462 av_extend (av, AvMAX (av) + 1);
268 463
269#define LOAD(state) load_state(aTHX_ (state)); 464 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
270#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 465}
271 466
272#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 467/** load & save, init *******************************************************/
273 468
274static void 469static void
275load_state(pTHX_ Coro__State c) 470load_perl (pTHX_ Coro__State c)
276{ 471{
277 PL_dowarn = c->dowarn; 472 perl_slots *slot = c->slot;
278 PL_in_eval = c->in_eval; 473 c->slot = 0;
279 474
280 PL_curstackinfo = c->curstackinfo;
281 PL_curstack = c->curstack;
282 PL_mainstack = c->mainstack; 475 PL_mainstack = c->mainstack;
283 PL_stack_sp = c->stack_sp;
284 PL_op = c->op;
285 PL_curpad = c->curpad;
286 PL_comppad = c->comppad;
287 PL_compcv = c->compcv;
288 PL_stack_base = c->stack_base;
289 PL_stack_max = c->stack_max;
290 PL_tmps_stack = c->tmps_stack;
291 PL_tmps_floor = c->tmps_floor;
292 PL_tmps_ix = c->tmps_ix;
293 PL_tmps_max = c->tmps_max;
294 PL_markstack = c->markstack;
295 PL_markstack_ptr = c->markstack_ptr;
296 PL_markstack_max = c->markstack_max;
297 PL_scopestack = c->scopestack;
298 PL_scopestack_ix = c->scopestack_ix;
299 PL_scopestack_max = c->scopestack_max;
300 PL_savestack = c->savestack;
301 PL_savestack_ix = c->savestack_ix;
302 PL_savestack_max = c->savestack_max;
303#if PERL_VERSION < 9
304 PL_retstack = c->retstack;
305 PL_retstack_ix = c->retstack_ix;
306 PL_retstack_max = c->retstack_max;
307#endif
308 PL_curpm = c->curpm;
309 PL_curcop = c->curcop;
310 476
311 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 477 GvSV (PL_defgv) = slot->defsv;
312 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 478 GvAV (PL_defgv) = slot->defav;
313 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 479 GvSV (PL_errgv) = slot->errsv;
480 GvSV (irsgv) = slot->irsgv;
481
482 #define VAR(name,type) PL_ ## name = slot->name;
483 # include "state.h"
484 #undef VAR
314 485
315 { 486 {
316 dSP; 487 dSP;
488
317 CV *cv; 489 CV *cv;
318 490
319 /* now do the ugly restore mess */ 491 /* now do the ugly restore mess */
320 while ((cv = (CV *)POPs)) 492 while (expect_true (cv = (CV *)POPs))
321 { 493 {
322 AV *padlist = (AV *)POPs;
323
324 if (padlist)
325 {
326 put_padlist (aTHX_ cv); /* mark this padlist as available */ 494 put_padlist (aTHX_ cv); /* mark this padlist as available */
327 CvPADLIST(cv) = padlist; 495 CvDEPTH (cv) = PTR2IV (POPs);
328 } 496 CvPADLIST (cv) = (AV *)POPs;
329
330 ++CvDEPTH(cv);
331 } 497 }
332 498
333 PUTBACK; 499 PUTBACK;
334 } 500 }
335} 501}
336 502
337static void 503static void
338save_state(pTHX_ Coro__State c, int flags) 504save_perl (pTHX_ Coro__State c)
339{ 505{
340 { 506 {
341 dSP; 507 dSP;
342 I32 cxix = cxstack_ix; 508 I32 cxix = cxstack_ix;
343 PERL_CONTEXT *ccstk = cxstack; 509 PERL_CONTEXT *ccstk = cxstack;
… …
346 /* 512 /*
347 * the worst thing you can imagine happens first - we have to save 513 * the worst thing you can imagine happens first - we have to save
348 * (and reinitialize) all cv's in the whole callchain :( 514 * (and reinitialize) all cv's in the whole callchain :(
349 */ 515 */
350 516
351 PUSHs (Nullsv); 517 XPUSHs (Nullsv);
352 /* this loop was inspired by pp_caller */ 518 /* this loop was inspired by pp_caller */
353 for (;;) 519 for (;;)
354 { 520 {
355 while (cxix >= 0) 521 while (expect_true (cxix >= 0))
356 { 522 {
357 PERL_CONTEXT *cx = &ccstk[cxix--]; 523 PERL_CONTEXT *cx = &ccstk[cxix--];
358 524
359 if (CxTYPE(cx) == CXt_SUB) 525 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
360 { 526 {
361 CV *cv = cx->blk_sub.cv; 527 CV *cv = cx->blk_sub.cv;
528
362 if (CvDEPTH(cv)) 529 if (expect_true (CvDEPTH (cv)))
363 { 530 {
364 EXTEND (SP, CvDEPTH(cv)*2); 531 EXTEND (SP, 3);
365
366 while (--CvDEPTH(cv))
367 {
368 /* this tells the restore code to increment CvDEPTH */
369 PUSHs (Nullsv);
370 PUSHs ((SV *)cv);
371 }
372
373 PUSHs ((SV *)CvPADLIST(cv)); 532 PUSHs ((SV *)CvPADLIST (cv));
533 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
374 PUSHs ((SV *)cv); 534 PUSHs ((SV *)cv);
375 535
536 CvDEPTH (cv) = 0;
376 get_padlist (aTHX_ cv); 537 get_padlist (aTHX_ cv);
377 } 538 }
378 } 539 }
379#ifdef CXt_FORMAT
380 else if (CxTYPE(cx) == CXt_FORMAT)
381 {
382 /* I never used formats, so how should I know how these are implemented? */
383 /* my bold guess is as a simple, plain sub... */
384 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
385 }
386#endif
387 } 540 }
388 541
389 if (top_si->si_type == PERLSI_MAIN) 542 if (expect_true (top_si->si_type == PERLSI_MAIN))
390 break; 543 break;
391 544
392 top_si = top_si->si_prev; 545 top_si = top_si->si_prev;
393 ccstk = top_si->si_cxstack; 546 ccstk = top_si->si_cxstack;
394 cxix = top_si->si_cxix; 547 cxix = top_si->si_cxix;
395 } 548 }
396 549
397 PUTBACK; 550 PUTBACK;
398 } 551 }
399 552
400 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 553 /* allocate some space on the context stack for our purposes */
401 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 554 /* we manually unroll here, as usually 2 slots is enough */
402 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 555 if (SLOT_COUNT >= 1) CXINC;
556 if (SLOT_COUNT >= 2) CXINC;
557 if (SLOT_COUNT >= 3) CXINC;
558 {
559 int i;
560 for (i = 3; i < SLOT_COUNT; ++i)
561 CXINC;
562 }
563 cxstack_ix -= SLOT_COUNT; /* undo allocation */
403 564
404 c->dowarn = PL_dowarn;
405 c->in_eval = PL_in_eval;
406
407 c->curstackinfo = PL_curstackinfo;
408 c->curstack = PL_curstack;
409 c->mainstack = PL_mainstack; 565 c->mainstack = PL_mainstack;
410 c->stack_sp = PL_stack_sp; 566
411 c->op = PL_op; 567 {
412 c->curpad = PL_curpad; 568 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
413 c->comppad = PL_comppad; 569
414 c->compcv = PL_compcv; 570 slot->defav = GvAV (PL_defgv);
415 c->stack_base = PL_stack_base; 571 slot->defsv = DEFSV;
416 c->stack_max = PL_stack_max; 572 slot->errsv = ERRSV;
417 c->tmps_stack = PL_tmps_stack; 573 slot->irsgv = GvSV (irsgv);
418 c->tmps_floor = PL_tmps_floor; 574
419 c->tmps_ix = PL_tmps_ix; 575 #define VAR(name,type) slot->name = PL_ ## name;
420 c->tmps_max = PL_tmps_max; 576 # include "state.h"
421 c->markstack = PL_markstack; 577 #undef VAR
422 c->markstack_ptr = PL_markstack_ptr; 578 }
423 c->markstack_max = PL_markstack_max;
424 c->scopestack = PL_scopestack;
425 c->scopestack_ix = PL_scopestack_ix;
426 c->scopestack_max = PL_scopestack_max;
427 c->savestack = PL_savestack;
428 c->savestack_ix = PL_savestack_ix;
429 c->savestack_max = PL_savestack_max;
430#if PERL_VERSION < 9
431 c->retstack = PL_retstack;
432 c->retstack_ix = PL_retstack_ix;
433 c->retstack_max = PL_retstack_max;
434#endif
435 c->curpm = PL_curpm;
436 c->curcop = PL_curcop;
437} 579}
438 580
439/* 581/*
440 * allocate various perl stacks. This is an exact copy 582 * allocate various perl stacks. This is an exact copy
441 * of perl.c:init_stacks, except that it uses less memory 583 * of perl.c:init_stacks, except that it uses less memory
442 * on the (sometimes correct) assumption that coroutines do 584 * on the (sometimes correct) assumption that coroutines do
443 * not usually need a lot of stackspace. 585 * not usually need a lot of stackspace.
444 */ 586 */
587#if CORO_PREFER_PERL_FUNCTIONS
588# define coro_init_stacks init_stacks
589#else
445static void 590static void
446coro_init_stacks (pTHX) 591coro_init_stacks (pTHX)
447{ 592{
448 LOCK; 593 PL_curstackinfo = new_stackinfo(32, 8);
449
450 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451 PL_curstackinfo->si_type = PERLSI_MAIN; 594 PL_curstackinfo->si_type = PERLSI_MAIN;
452 PL_curstack = PL_curstackinfo->si_stack; 595 PL_curstack = PL_curstackinfo->si_stack;
453 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 596 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454 597
455 PL_stack_base = AvARRAY(PL_curstack); 598 PL_stack_base = AvARRAY(PL_curstack);
456 PL_stack_sp = PL_stack_base; 599 PL_stack_sp = PL_stack_base;
457 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 600 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458 601
459 New(50,PL_tmps_stack,96,SV*); 602 New(50,PL_tmps_stack,32,SV*);
460 PL_tmps_floor = -1; 603 PL_tmps_floor = -1;
461 PL_tmps_ix = -1; 604 PL_tmps_ix = -1;
462 PL_tmps_max = 96; 605 PL_tmps_max = 32;
463 606
464 New(54,PL_markstack,16,I32); 607 New(54,PL_markstack,16,I32);
465 PL_markstack_ptr = PL_markstack; 608 PL_markstack_ptr = PL_markstack;
466 PL_markstack_max = PL_markstack + 16; 609 PL_markstack_max = PL_markstack + 16;
467 610
468#ifdef SET_MARK_OFFSET 611#ifdef SET_MARK_OFFSET
469 SET_MARK_OFFSET; 612 SET_MARK_OFFSET;
470#endif 613#endif
471 614
472 New(54,PL_scopestack,16,I32); 615 New(54,PL_scopestack,8,I32);
473 PL_scopestack_ix = 0; 616 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16; 617 PL_scopestack_max = 8;
475 618
476 New(54,PL_savestack,96,ANY); 619 New(54,PL_savestack,24,ANY);
477 PL_savestack_ix = 0; 620 PL_savestack_ix = 0;
478 PL_savestack_max = 96; 621 PL_savestack_max = 24;
479 622
480#if PERL_VERSION < 9 623#if !PERL_VERSION_ATLEAST (5,10,0)
481 New(54,PL_retstack,8,OP*); 624 New(54,PL_retstack,4,OP*);
482 PL_retstack_ix = 0; 625 PL_retstack_ix = 0;
483 PL_retstack_max = 8; 626 PL_retstack_max = 4;
484#endif 627#endif
485
486 UNLOCK;
487} 628}
629#endif
488 630
489/* 631/*
490 * destroy the stacks, the callchain etc... 632 * destroy the stacks, the callchain etc...
491 */ 633 */
492static void 634static void
493destroy_stacks(pTHX) 635coro_destruct_stacks (pTHX)
494{ 636{
495 if (!IN_DESTRUCT)
496 {
497 /* is this ugly, I ask? */
498 LEAVE_SCOPE (0);
499
500 /* sure it is, but more important: is it correct?? :/ */
501 FREETMPS;
502
503 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
504 }
505
506 while (PL_curstackinfo->si_next) 637 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 638 PL_curstackinfo = PL_curstackinfo->si_next;
508 639
509 while (PL_curstackinfo) 640 while (PL_curstackinfo)
510 { 641 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 642 PERL_SI *p = PL_curstackinfo->si_prev;
512 643
513 { /*D*//*remove*/
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (!IN_DESTRUCT) 644 if (!IN_DESTRUCT)
520 {
521 dounwind (-1);/*D*//*remove*/
522 SvREFCNT_dec (PL_curstackinfo->si_stack); 645 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 }
524 646
525 Safefree (PL_curstackinfo->si_cxstack); 647 Safefree (PL_curstackinfo->si_cxstack);
526 Safefree (PL_curstackinfo); 648 Safefree (PL_curstackinfo);
527 PL_curstackinfo = p; 649 PL_curstackinfo = p;
528 } 650 }
529 651
530 Safefree (PL_tmps_stack); 652 Safefree (PL_tmps_stack);
531 Safefree (PL_markstack); 653 Safefree (PL_markstack);
532 Safefree (PL_scopestack); 654 Safefree (PL_scopestack);
533 Safefree (PL_savestack); 655 Safefree (PL_savestack);
534#if PERL_VERSION < 9 656#if !PERL_VERSION_ATLEAST (5,10,0)
535 Safefree (PL_retstack); 657 Safefree (PL_retstack);
536#endif 658#endif
537} 659}
538 660
661static size_t
662coro_rss (pTHX_ struct coro *coro)
663{
664 size_t rss = sizeof (*coro);
665
666 if (coro->mainstack)
667 {
668 perl_slots tmp_slot;
669 perl_slots *slot;
670
671 if (coro->flags & CF_RUNNING)
672 {
673 slot = &tmp_slot;
674
675 #define VAR(name,type) slot->name = PL_ ## name;
676 # include "state.h"
677 #undef VAR
678 }
679 else
680 slot = coro->slot;
681
682 if (slot)
683 {
684 rss += sizeof (slot->curstackinfo);
685 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
686 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
687 rss += slot->tmps_max * sizeof (SV *);
688 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
689 rss += slot->scopestack_max * sizeof (I32);
690 rss += slot->savestack_max * sizeof (ANY);
691
692#if !PERL_VERSION_ATLEAST (5,10,0)
693 rss += slot->retstack_max * sizeof (OP *);
694#endif
695 }
696 }
697
698 return rss;
699}
700
701/** coroutine stack handling ************************************************/
702
703static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
704static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
705static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
706
707/* apparently < 5.8.8 */
708#ifndef MgPV_nolen_const
709#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
710 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
711 (const char*)(mg)->mg_ptr)
712#endif
713
714/*
715 * This overrides the default magic get method of %SIG elements.
716 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
717 * and instead of tryign to save and restore the hash elements, we just provide
718 * readback here.
719 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
720 * not expecting this to actually change the hook. This is a potential problem
721 * when a schedule happens then, but we ignore this.
722 */
723static int
724coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
725{
726 const char *s = MgPV_nolen_const (mg);
727
728 if (*s == '_')
729 {
730 SV **svp = 0;
731
732 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
733 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
734
735 if (svp)
736 {
737 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
738 return 0;
739 }
740 }
741
742 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
743}
744
745static int
746coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
747{
748 const char *s = MgPV_nolen_const (mg);
749
750 if (*s == '_')
751 {
752 SV **svp = 0;
753
754 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
755 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
756
757 if (svp)
758 {
759 SV *old = *svp;
760 *svp = 0;
761 SvREFCNT_dec (old);
762 return 0;
763 }
764 }
765
766 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
767}
768
769static int
770coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
771{
772 const char *s = MgPV_nolen_const (mg);
773
774 if (*s == '_')
775 {
776 SV **svp = 0;
777
778 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
779 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
780
781 if (svp)
782 {
783 SV *old = *svp;
784 *svp = newSVsv (sv);
785 SvREFCNT_dec (old);
786 return 0;
787 }
788 }
789
790 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
791}
792
539static void 793static void
540setup_coro (struct coro *coro) 794coro_setup (pTHX_ struct coro *coro)
541{ 795{
542 /* 796 /*
543 * emulate part of the perl startup here. 797 * emulate part of the perl startup here.
544 */ 798 */
545 dTHX; 799 coro_init_stacks (aTHX);
800
801 PL_runops = RUNOPS_DEFAULT;
802 PL_curcop = &PL_compiling;
803 PL_in_eval = EVAL_NULL;
804 PL_comppad = 0;
805 PL_curpm = 0;
806 PL_curpad = 0;
807 PL_localizing = 0;
808 PL_dirty = 0;
809 PL_restartop = 0;
810#if PERL_VERSION_ATLEAST (5,10,0)
811 PL_parser = 0;
812#endif
813
814 /* recreate the die/warn hooks */
815 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
816 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
817
818 GvSV (PL_defgv) = newSV (0);
819 GvAV (PL_defgv) = coro->args; coro->args = 0;
820 GvSV (PL_errgv) = newSV (0);
821 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
822 PL_rs = newSVsv (GvSV (irsgv));
823 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
824
825 {
826 dSP;
827 LOGOP myop;
828
829 Zero (&myop, 1, LOGOP);
830 myop.op_next = Nullop;
831 myop.op_flags = OPf_WANT_VOID;
832
833 PUSHMARK (SP);
834 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
835 PUTBACK;
836 PL_op = (OP *)&myop;
837 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
838 SPAGAIN;
839 }
840
841 /* this newly created coroutine might be run on an existing cctx which most
842 * likely was suspended in set_stacklevel, called from entersub.
843 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
844 * so we ENTER here for symmetry
845 */
846 ENTER;
847}
848
849static void
850coro_destruct (pTHX_ struct coro *coro)
851{
852 if (!IN_DESTRUCT)
853 {
854 /* restore all saved variables and stuff */
855 LEAVE_SCOPE (0);
856 assert (PL_tmps_floor == -1);
857
858 /* free all temporaries */
859 FREETMPS;
860 assert (PL_tmps_ix == -1);
861
862 /* unwind all extra stacks */
863 POPSTACK_TO (PL_mainstack);
864
865 /* unwind main stack */
866 dounwind (-1);
867 }
868
869 SvREFCNT_dec (GvSV (PL_defgv));
870 SvREFCNT_dec (GvAV (PL_defgv));
871 SvREFCNT_dec (GvSV (PL_errgv));
872 SvREFCNT_dec (PL_defoutgv);
873 SvREFCNT_dec (PL_rs);
874 SvREFCNT_dec (GvSV (irsgv));
875
876 SvREFCNT_dec (PL_diehook);
877 SvREFCNT_dec (PL_warnhook);
878
879 SvREFCNT_dec (coro->saved_deffh);
880 SvREFCNT_dec (coro->throw);
881
882 coro_destruct_stacks (aTHX);
883}
884
885static void
886free_coro_mortal (pTHX)
887{
888 if (expect_true (coro_mortal))
889 {
890 SvREFCNT_dec (coro_mortal);
891 coro_mortal = 0;
892 }
893}
894
895static int
896runops_trace (pTHX)
897{
898 COP *oldcop = 0;
899 int oldcxix = -2;
900 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
901 coro_cctx *cctx = coro->cctx;
902
903 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
904 {
905 PERL_ASYNC_CHECK ();
906
907 if (cctx->flags & CC_TRACE_ALL)
908 {
909 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
910 {
911 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
912 SV **bot, **top;
913 AV *av = newAV (); /* return values */
914 SV **cb;
915 dSP;
916
917 GV *gv = CvGV (cx->blk_sub.cv);
918 SV *fullname = sv_2mortal (newSV (0));
919 if (isGV (gv))
920 gv_efullname3 (fullname, gv, 0);
921
922 bot = PL_stack_base + cx->blk_oldsp + 1;
923 top = cx->blk_gimme == G_ARRAY ? SP + 1
924 : cx->blk_gimme == G_SCALAR ? bot + 1
925 : bot;
926
927 av_extend (av, top - bot);
928 while (bot < top)
929 av_push (av, SvREFCNT_inc_NN (*bot++));
930
931 PL_runops = RUNOPS_DEFAULT;
932 ENTER;
933 SAVETMPS;
934 EXTEND (SP, 3);
935 PUSHMARK (SP);
936 PUSHs (&PL_sv_no);
937 PUSHs (fullname);
938 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
939 PUTBACK;
940 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
941 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
942 SPAGAIN;
943 FREETMPS;
944 LEAVE;
945 PL_runops = runops_trace;
946 }
947
948 if (oldcop != PL_curcop)
949 {
950 oldcop = PL_curcop;
951
952 if (PL_curcop != &PL_compiling)
953 {
954 SV **cb;
955
956 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
957 {
958 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
959
960 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
961 {
962 runops_proc_t old_runops = PL_runops;
963 dSP;
964 GV *gv = CvGV (cx->blk_sub.cv);
965 SV *fullname = sv_2mortal (newSV (0));
966
967 if (isGV (gv))
968 gv_efullname3 (fullname, gv, 0);
969
970 PL_runops = RUNOPS_DEFAULT;
971 ENTER;
972 SAVETMPS;
973 EXTEND (SP, 3);
974 PUSHMARK (SP);
975 PUSHs (&PL_sv_yes);
976 PUSHs (fullname);
977 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
978 PUTBACK;
979 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
980 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
981 SPAGAIN;
982 FREETMPS;
983 LEAVE;
984 PL_runops = runops_trace;
985 }
986
987 oldcxix = cxstack_ix;
988 }
989
990 if (cctx->flags & CC_TRACE_LINE)
991 {
992 dSP;
993
994 PL_runops = RUNOPS_DEFAULT;
995 ENTER;
996 SAVETMPS;
997 EXTEND (SP, 3);
998 PL_runops = RUNOPS_DEFAULT;
999 PUSHMARK (SP);
1000 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1001 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1002 PUTBACK;
1003 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1004 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1005 SPAGAIN;
1006 FREETMPS;
1007 LEAVE;
1008 PL_runops = runops_trace;
1009 }
1010 }
1011 }
1012 }
1013 }
1014
1015 TAINT_NOT;
1016 return 0;
1017}
1018
1019/* inject a fake call to Coro::State::_cctx_init into the execution */
1020/* _cctx_init should be careful, as it could be called at almost any time */
1021/* during execution of a perl program */
1022static void NOINLINE
1023cctx_prepare (pTHX_ coro_cctx *cctx)
1024{
546 dSP; 1025 dSP;
547 UNOP myop; 1026 LOGOP myop;
548 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
549 1027
550 coro_init_stacks (aTHX); 1028 PL_top_env = &PL_start_env;
551 /*PL_curcop = 0;*/
552 /*PL_in_eval = PL_in_eval;*/ /* inherit */
553 SvREFCNT_dec (GvAV (PL_defgv));
554 GvAV (PL_defgv) = coro->args; coro->args = 0;
555 1029
556 SPAGAIN; 1030 if (cctx->flags & CC_TRACE)
1031 PL_runops = runops_trace;
557 1032
558 Zero (&myop, 1, UNOP); 1033 Zero (&myop, 1, LOGOP);
559 myop.op_next = Nullop; 1034 myop.op_next = PL_op;
560 myop.op_flags = OPf_WANT_VOID; 1035 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
561 1036
1037 PUSHMARK (SP);
1038 EXTEND (SP, 2);
1039 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1040 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1041 PUTBACK;
562 PL_op = (OP *)&myop; 1042 PL_op = (OP *)&myop;
563
564 PUSHMARK(SP);
565 XPUSHs (sub_init);
566 PUTBACK;
567 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1043 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568 SPAGAIN; 1044 SPAGAIN;
569
570 ENTER; /* necessary e.g. for dounwind */
571} 1045}
572 1046
1047/*
1048 * this is a _very_ stripped down perl interpreter ;)
1049 */
573static void 1050static void
574free_coro_mortal () 1051cctx_run (void *arg)
575{ 1052{
576 if (coro_mortal) 1053 dTHX;
577 { 1054
578 SvREFCNT_dec (coro_mortal); 1055 /* cctx_run is the alternative tail of transfer(), so unlock here. */
579 coro_mortal = 0; 1056 UNLOCK;
1057
1058 /* we now skip the entersub that lead to transfer() */
1059 PL_op = PL_op->op_next;
1060
1061 /* inject a fake subroutine call to cctx_init */
1062 cctx_prepare (aTHX_ (coro_cctx *)arg);
1063
1064 /* somebody or something will hit me for both perl_run and PL_restartop */
1065 PL_restartop = PL_op;
1066 perl_run (PL_curinterp);
1067
1068 /*
1069 * If perl-run returns we assume exit() was being called or the coro
1070 * fell off the end, which seems to be the only valid (non-bug)
1071 * reason for perl_run to return. We try to exit by jumping to the
1072 * bootstrap-time "top" top_env, as we cannot restore the "main"
1073 * coroutine as Coro has no such concept
1074 */
1075 PL_top_env = main_top_env;
1076 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1077}
1078
1079static coro_cctx *
1080cctx_new ()
1081{
1082 coro_cctx *cctx;
1083 void *stack_start;
1084 size_t stack_size;
1085
1086 ++cctx_count;
1087 Newz (0, cctx, 1, coro_cctx);
1088
1089 cctx->gen = cctx_gen;
1090
1091#if HAVE_MMAP
1092 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1093 /* mmap supposedly does allocate-on-write for us */
1094 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1095
1096 if (cctx->sptr != (void *)-1)
580 } 1097 {
1098# if CORO_STACKGUARD
1099 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1100# endif
1101 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1102 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1103 cctx->flags |= CC_MAPPED;
1104 }
1105 else
1106#endif
1107 {
1108 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1109 New (0, cctx->sptr, cctx_stacksize, long);
1110
1111 if (!cctx->sptr)
1112 {
1113 perror ("FATAL: unable to allocate stack for coroutine");
1114 _exit (EXIT_FAILURE);
1115 }
1116
1117 stack_start = cctx->sptr;
1118 stack_size = cctx->ssize;
1119 }
1120
1121 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1122 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1123
1124 return cctx;
581} 1125}
582 1126
583static void 1127static void
584coro_run (void *arg) 1128cctx_destroy (coro_cctx *cctx)
585{ 1129{
586 /* 1130 if (!cctx)
587 * this is a _very_ stripped down perl interpreter ;) 1131 return;
588 */
589 dTHX;
590 1132
591 UNLOCK; 1133 --cctx_count;
1134 coro_destroy (&cctx->cctx);
592 1135
593 PL_top_env = &PL_start_env; 1136 /* coro_transfer creates new, empty cctx's */
594 1137 if (cctx->sptr)
595 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1138 {
596 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op)); 1139#if CORO_USE_VALGRIND
597 1140 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
598 /* continue at cctx_init, without entersub */ 1141#endif
599 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
600
601 /* somebody will hit me for both perl_run and PL_restart_op */
602 perl_run (aTHX_ PERL_GET_CONTEXT);
603
604 abort ();
605}
606
607static coro_stack *
608stack_new ()
609{
610 coro_stack *stack;
611
612 New (0, stack, 1, coro_stack);
613 1142
614#if HAVE_MMAP 1143#if HAVE_MMAP
615 1144 if (cctx->flags & CC_MAPPED)
616 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 1145 munmap (cctx->sptr, cctx->ssize);
617 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1146 else
618 1147#endif
619 if (stack->sptr == (void *)-1) 1148 Safefree (cctx->sptr);
620 { 1149 }
621 perror ("FATAL: unable to mmap stack for coroutine"); 1150
622 _exit (EXIT_FAILURE); 1151 Safefree (cctx);
1152}
1153
1154/* wether this cctx should be destructed */
1155#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1156
1157static coro_cctx *
1158cctx_get (pTHX)
1159{
1160 while (expect_true (cctx_first))
623 } 1161 {
1162 coro_cctx *cctx = cctx_first;
1163 cctx_first = cctx->next;
1164 --cctx_idle;
624 1165
625 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1166 if (expect_true (!CCTX_EXPIRED (cctx)))
1167 return cctx;
626 1168
627#else 1169 cctx_destroy (cctx);
628
629 stack->ssize = STACKSIZE * (long)sizeof (long);
630 New (0, stack->sptr, STACKSIZE, long);
631
632 if (!stack->sptr)
633 { 1170 }
634 perror (stderr, "FATAL: unable to malloc stack for coroutine");
635 _exit (EXIT_FAILURE);
636 }
637 1171
638#endif 1172 return cctx_new ();
639
640 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
641
642 return stack;
643} 1173}
644 1174
645static void 1175static void
646stack_free (coro_stack *stack) 1176cctx_put (coro_cctx *cctx)
647{ 1177{
648 if (!stack || stack == main_stack) 1178 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
649 return;
650 1179
651#if HAVE_MMAP 1180 /* free another cctx if overlimit */
652 munmap (stack->sptr, stack->ssize); 1181 if (expect_false (cctx_idle >= cctx_max_idle))
653#else
654 Safefree (stack->sptr);
655#endif
656
657 Safefree (stack);
658}
659
660static coro_stack *stack_first;
661
662static coro_stack *
663stack_get ()
664{
665 coro_stack *stack;
666
667 if (stack_first)
668 {
669 stack = stack_first;
670 stack_first = stack->next;
671 }
672 else
673 { 1182 {
674 stack = stack_new (); 1183 coro_cctx *first = cctx_first;
675 PL_op = PL_op->op_next; 1184 cctx_first = first->next;
1185 --cctx_idle;
1186
1187 cctx_destroy (first);
676 } 1188 }
677 1189
678 return stack; 1190 ++cctx_idle;
1191 cctx->next = cctx_first;
1192 cctx_first = cctx;
679} 1193}
1194
1195/** coroutine switching *****************************************************/
680 1196
681static void 1197static void
682stack_put (coro_stack *stack) 1198transfer_check (pTHX_ struct coro *prev, struct coro *next)
683{ 1199{
684 stack->next = stack_first; 1200 if (expect_true (prev != next))
685 stack_first = stack; 1201 {
686} 1202 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1203 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
687 1204
688/* never call directly, always through the coro_state_transfer global variable */ 1205 if (expect_false (next->flags & CF_RUNNING))
689static void 1206 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1207
1208 if (expect_false (next->flags & CF_DESTROYED))
1209 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1210
1211#if !PERL_VERSION_ATLEAST (5,10,0)
1212 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1213 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1214#endif
1215 }
1216}
1217
1218/* always use the TRANSFER macro */
1219static void NOINLINE
690transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1220transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
691{ 1221{
692 dSTACKLEVEL; 1222 dSTACKLEVEL;
693 1223
694 /* sometimes transfer is only called to set idle_sp */ 1224 /* sometimes transfer is only called to set idle_sp */
695 if (flags == TRANSFER_SET_STACKLEVEL) 1225 if (expect_false (!next))
1226 {
696 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1227 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
697 else if (prev != next) 1228 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
698 { 1229 }
1230 else if (expect_true (prev != next))
1231 {
1232 static volatile int has_throw;
699 coro_stack *prev__stack; 1233 coro_cctx *prev__cctx;
1234
1235 if (expect_false (prev->flags & CF_NEW))
1236 {
1237 /* create a new empty/source context */
1238 ++cctx_count;
1239 New (0, prev->cctx, 1, coro_cctx);
1240 prev->cctx->sptr = 0;
1241 coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1242
1243 prev->flags &= ~CF_NEW;
1244 prev->flags |= CF_RUNNING;
1245 }
1246
1247 prev->flags &= ~CF_RUNNING;
1248 next->flags |= CF_RUNNING;
700 1249
701 LOCK; 1250 LOCK;
702 1251
703 if (next->mainstack) 1252 /* first get rid of the old state */
1253 save_perl (aTHX_ prev);
1254
1255 if (expect_false (next->flags & CF_NEW))
704 { 1256 {
705 /* coroutine already started */ 1257 /* need to start coroutine */
706 SAVE (prev, flags); 1258 next->flags &= ~CF_NEW;
707 LOAD (next); 1259 /* setup coroutine call */
1260 coro_setup (aTHX_ next);
708 } 1261 }
709 else 1262 else
1263 load_perl (aTHX_ next);
1264
1265 prev__cctx = prev->cctx;
1266
1267 /* possibly "free" the cctx */
1268 if (expect_true (
1269 prev__cctx->idle_sp == STACKLEVEL
1270 && !(prev__cctx->flags & CC_TRACE)
1271 && !force_cctx
1272 ))
710 { 1273 {
711 /* need to start coroutine */ 1274 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
712 /* first get rid of the old state */ 1275 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
713 SAVE (prev, -1); 1276
714 /* setup coroutine call */ 1277 prev->cctx = 0;
715 setup_coro (next); 1278
716 /* need a stack */ 1279 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
717 next->stack = 0; 1280 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1281 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1282 if (!next->cctx)
1283 next->cctx = cctx_get (aTHX);
1284
1285 cctx_put (prev__cctx);
718 } 1286 }
719 1287
720 prev__stack = prev->stack; 1288 ++next->usecount;
721 1289
722 /* possibly "free" the stack */ 1290 if (expect_true (!next->cctx))
723 if (prev__stack->idle_sp == STACKLEVEL) 1291 next->cctx = cctx_get (aTHX);
1292
1293 has_throw = !!next->throw;
1294
1295 if (expect_false (prev__cctx != next->cctx))
724 { 1296 {
725 stack_put (prev__stack); 1297 prev__cctx->top_env = PL_top_env;
726 prev->stack = 0; 1298 PL_top_env = next->cctx->top_env;
1299 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
727 } 1300 }
728 1301
729 if (!next->stack) 1302 free_coro_mortal (aTHX);
730 next->stack = stack_get (); 1303 UNLOCK;
731 1304
732 if (prev__stack != next->stack) 1305 if (expect_false (has_throw))
733 { 1306 {
734 prev__stack->top_env = PL_top_env; 1307 struct coro *coro = SvSTATE (coro_current);
735 PL_top_env = next->stack->top_env; 1308
736 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1309 if (coro->throw)
1310 {
1311 SV *exception = coro->throw;
1312 coro->throw = 0;
1313 sv_setsv (ERRSV, exception);
1314 croak (0);
1315 }
737 } 1316 }
1317 }
1318}
738 1319
739 free_coro_mortal (); 1320struct transfer_args
1321{
1322 struct coro *prev, *next;
1323};
740 1324
1325#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1326#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1327
1328/** high level stuff ********************************************************/
1329
1330static int
1331coro_state_destroy (pTHX_ struct coro *coro)
1332{
1333 if (coro->flags & CF_DESTROYED)
1334 return 0;
1335
1336 coro->flags |= CF_DESTROYED;
1337
1338 if (coro->flags & CF_READY)
1339 {
1340 /* reduce nready, as destroying a ready coro effectively unreadies it */
1341 /* alternative: look through all ready queues and remove the coro */
1342 LOCK;
1343 --coro_nready;
741 UNLOCK; 1344 UNLOCK;
742 } 1345 }
743} 1346 else
744 1347 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
745/* use this function pointer to call the above function */
746/* this is done to increase chances of the compiler not inlining the call */
747/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
748void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
749
750struct transfer_args
751{
752 struct coro *prev, *next;
753 int flags;
754};
755
756#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
757
758static void
759coro_state_destroy (struct coro *coro)
760{
761 if (coro->refcnt--)
762 return;
763 1348
764 if (coro->mainstack && coro->mainstack != main_mainstack) 1349 if (coro->mainstack && coro->mainstack != main_mainstack)
765 { 1350 {
766 struct coro temp; 1351 struct coro temp;
767 1352
768 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1353 if (coro->flags & CF_RUNNING)
1354 croak ("FATAL: tried to destroy currently running coroutine");
1355
1356 save_perl (aTHX_ &temp);
769 LOAD (aTHX_ coro); 1357 load_perl (aTHX_ coro);
770 1358
771 destroy_stacks (aTHX); 1359 coro_destruct (aTHX_ coro);
772 1360
773 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1361 load_perl (aTHX_ &temp);
774 1362
775 coro->mainstack = 0; 1363 coro->slot = 0;
776 } 1364 }
777 1365
778 stack_free (coro->stack); 1366 cctx_destroy (coro->cctx);
779 SvREFCNT_dec (coro->args); 1367 SvREFCNT_dec (coro->args);
780 Safefree (coro); 1368
1369 if (coro->next) coro->next->prev = coro->prev;
1370 if (coro->prev) coro->prev->next = coro->next;
1371 if (coro == coro_first) coro_first = coro->next;
1372
1373 return 1;
781} 1374}
782 1375
783static int 1376static int
784coro_state_clear (SV *sv, MAGIC *mg) 1377coro_state_free (pTHX_ SV *sv, MAGIC *mg)
785{ 1378{
786 struct coro *coro = (struct coro *)mg->mg_ptr; 1379 struct coro *coro = (struct coro *)mg->mg_ptr;
787 mg->mg_ptr = 0; 1380 mg->mg_ptr = 0;
788 1381
1382 coro->hv = 0;
1383
1384 if (--coro->refcnt < 0)
1385 {
789 coro_state_destroy (coro); 1386 coro_state_destroy (aTHX_ coro);
1387 Safefree (coro);
1388 }
790 1389
791 return 0; 1390 return 0;
792} 1391}
793 1392
794static int 1393static int
795coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1394coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
796{ 1395{
797 struct coro *coro = (struct coro *)mg->mg_ptr; 1396 struct coro *coro = (struct coro *)mg->mg_ptr;
798 1397
799 ++coro->refcnt; 1398 ++coro->refcnt;
800 1399
801 return 0; 1400 return 0;
802} 1401}
803 1402
804static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1403static MGVTBL coro_state_vtbl = {
805 1404 0, 0, 0, 0,
806static struct coro * 1405 coro_state_free,
807SvSTATE (SV *coro) 1406 0,
808{ 1407#ifdef MGf_DUP
809 HV *stash; 1408 coro_state_dup,
810 MAGIC *mg; 1409#else
811 1410# define MGf_DUP 0
812 if (SvROK (coro)) 1411#endif
813 coro = SvRV (coro); 1412};
814
815 stash = SvSTASH (coro);
816 if (stash != coro_stash && stash != coro_state_stash)
817 {
818 /* very slow, but rare, check */
819 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
820 croak ("Coro::State object required");
821 }
822
823 mg = SvMAGIC (coro);
824 assert (mg->mg_type == PERL_MAGIC_ext);
825 return (struct coro *)mg->mg_ptr;
826}
827 1413
828static void 1414static void
829prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags) 1415prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
830{ 1416{
831 ta->prev = SvSTATE (prev); 1417 ta->prev = SvSTATE (prev_sv);
832 ta->next = SvSTATE (next); 1418 ta->next = SvSTATE (next_sv);
833 ta->flags = flags; 1419 TRANSFER_CHECK (*ta);
834} 1420}
835 1421
836static void 1422static void
837api_transfer (SV *prev, SV *next, int flags) 1423api_transfer (SV *prev_sv, SV *next_sv)
838{ 1424{
839 dTHX; 1425 dTHX;
840 struct transfer_args ta; 1426 struct transfer_args ta;
841 1427
842 prepare_transfer (aTHX_ &ta, prev, next, flags); 1428 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
843 TRANSFER (ta); 1429 TRANSFER (ta, 1);
844} 1430}
845 1431
846/** Coro ********************************************************************/ 1432/** Coro ********************************************************************/
847 1433
848#define PRIO_MAX 3
849#define PRIO_HIGH 1
850#define PRIO_NORMAL 0
851#define PRIO_LOW -1
852#define PRIO_IDLE -3
853#define PRIO_MIN -4
854
855/* for Coro.pm */
856static GV *coro_current, *coro_idle;
857static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858static int coro_nready;
859
860static void 1434static void
861coro_enq (pTHX_ SV *sv) 1435coro_enq (pTHX_ SV *coro_sv)
1436{
1437 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1438}
1439
1440static SV *
1441coro_deq (pTHX)
862{ 1442{
863 int prio; 1443 int prio;
864 1444
865 if (SvTYPE (sv) != SVt_PVHV)
866 croak ("Coro::ready tried to enqueue something that is not a coroutine");
867
868 prio = SvSTATE (sv)->prio;
869
870 av_push (coro_ready [prio - PRIO_MIN], sv);
871 coro_nready++;
872}
873
874static SV *
875coro_deq (pTHX_ int min_prio)
876{
877 int prio = PRIO_MAX - PRIO_MIN;
878
879 min_prio -= PRIO_MIN;
880 if (min_prio < 0)
881 min_prio = 0;
882
883 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1445 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
884 if (AvFILLp (coro_ready [prio]) >= 0) 1446 if (AvFILLp (coro_ready [prio]) >= 0)
885 {
886 coro_nready--;
887 return av_shift (coro_ready [prio]); 1447 return av_shift (coro_ready [prio]);
888 }
889 1448
890 return 0; 1449 return 0;
891} 1450}
892 1451
1452static int
1453api_ready (SV *coro_sv)
1454{
1455 dTHX;
1456 struct coro *coro;
1457 SV *sv_hook;
1458 void (*xs_hook)(void);
1459
1460 if (SvROK (coro_sv))
1461 coro_sv = SvRV (coro_sv);
1462
1463 coro = SvSTATE (coro_sv);
1464
1465 if (coro->flags & CF_READY)
1466 return 0;
1467
1468 coro->flags |= CF_READY;
1469
1470 LOCK;
1471
1472 sv_hook = coro_nready ? 0 : coro_readyhook;
1473 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1474
1475 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1476 ++coro_nready;
1477
1478 UNLOCK;
1479
1480 if (sv_hook)
1481 {
1482 dSP;
1483
1484 ENTER;
1485 SAVETMPS;
1486
1487 PUSHMARK (SP);
1488 PUTBACK;
1489 call_sv (sv_hook, G_DISCARD);
1490 SPAGAIN;
1491
1492 FREETMPS;
1493 LEAVE;
1494 }
1495
1496 if (xs_hook)
1497 xs_hook ();
1498
1499 return 1;
1500}
1501
1502static int
1503api_is_ready (SV *coro_sv)
1504{
1505 dTHX;
1506 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1507}
1508
893static void 1509static void
894api_ready (SV *coro) 1510prepare_schedule (pTHX_ struct transfer_args *ta)
895{ 1511{
896 dTHX; 1512 SV *prev_sv, *next_sv;
897 1513
898 if (SvROK (coro)) 1514 for (;;)
899 coro = SvRV (coro); 1515 {
1516 LOCK;
1517 next_sv = coro_deq (aTHX);
1518
1519 /* nothing to schedule: call the idle handler */
1520 if (expect_false (!next_sv))
1521 {
1522 dSP;
1523 UNLOCK;
1524
1525 ENTER;
1526 SAVETMPS;
1527
1528 PUSHMARK (SP);
1529 PUTBACK;
1530 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1531 SPAGAIN;
1532
1533 FREETMPS;
1534 LEAVE;
1535 continue;
1536 }
1537
1538 ta->next = SvSTATE (next_sv);
1539
1540 /* cannot transfer to destroyed coros, skip and look for next */
1541 if (expect_false (ta->next->flags & CF_DESTROYED))
1542 {
1543 UNLOCK;
1544 SvREFCNT_dec (next_sv);
1545 /* coro_nready is already taken care of by destroy */
1546 continue;
1547 }
1548
1549 --coro_nready;
1550 UNLOCK;
1551 break;
1552 }
1553
1554 /* free this only after the transfer */
1555 prev_sv = SvRV (coro_current);
1556 ta->prev = SvSTATE (prev_sv);
1557 TRANSFER_CHECK (*ta);
1558 assert (ta->next->flags & CF_READY);
1559 ta->next->flags &= ~CF_READY;
1560 SvRV_set (coro_current, next_sv);
900 1561
901 LOCK; 1562 LOCK;
902 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1563 free_coro_mortal (aTHX);
1564 coro_mortal = prev_sv;
903 UNLOCK; 1565 UNLOCK;
904} 1566}
905 1567
906static void 1568static void
907prepare_schedule (aTHX_ struct transfer_args *ta)
908{
909 SV *current, *prev, *next;
910
911 LOCK;
912
913 current = GvSV (coro_current);
914
915 for (;;)
916 {
917 LOCK;
918
919 next = coro_deq (aTHX_ PRIO_MIN);
920
921 if (next)
922 break;
923
924 UNLOCK;
925
926 {
927 dSP;
928
929 ENTER;
930 SAVETMPS;
931
932 PUSHMARK (SP);
933 PUTBACK;
934 call_sv (GvSV (coro_idle), G_DISCARD);
935
936 FREETMPS;
937 LEAVE;
938 }
939 }
940
941 prev = SvRV (current);
942 SvRV (current) = next;
943
944 /* free this only after the transfer */
945 free_coro_mortal ();
946 coro_mortal = prev;
947
948 ta->prev = SvSTATE (prev);
949 ta->next = SvSTATE (next);
950 ta->flags = TRANSFER_SAVE_ALL;
951
952 UNLOCK;
953}
954
955static void
956prepare_cede (aTHX_ struct transfer_args *ta) 1569prepare_cede (pTHX_ struct transfer_args *ta)
957{ 1570{
958 LOCK; 1571 api_ready (coro_current);
959 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
960 UNLOCK;
961
962 prepare_schedule (ta); 1572 prepare_schedule (aTHX_ ta);
1573}
1574
1575static int
1576prepare_cede_notself (pTHX_ struct transfer_args *ta)
1577{
1578 if (coro_nready)
1579 {
1580 SV *prev = SvRV (coro_current);
1581 prepare_schedule (aTHX_ ta);
1582 api_ready (prev);
1583 return 1;
1584 }
1585 else
1586 return 0;
963} 1587}
964 1588
965static void 1589static void
966api_schedule (void) 1590api_schedule (void)
967{ 1591{
968 dTHX; 1592 dTHX;
969 struct transfer_args ta; 1593 struct transfer_args ta;
970 1594
971 prepare_schedule (&ta); 1595 prepare_schedule (aTHX_ &ta);
972 TRANSFER (ta); 1596 TRANSFER (ta, 1);
973} 1597}
974 1598
975static void 1599static int
976api_cede (void) 1600api_cede (void)
977{ 1601{
978 dTHX; 1602 dTHX;
979 struct transfer_args ta; 1603 struct transfer_args ta;
980 1604
981 prepare_cede (&ta); 1605 prepare_cede (aTHX_ &ta);
1606
1607 if (expect_true (ta.prev != ta.next))
1608 {
982 TRANSFER (ta); 1609 TRANSFER (ta, 1);
1610 return 1;
1611 }
1612 else
1613 return 0;
983} 1614}
984 1615
1616static int
1617api_cede_notself (void)
1618{
1619 dTHX;
1620 struct transfer_args ta;
1621
1622 if (prepare_cede_notself (aTHX_ &ta))
1623 {
1624 TRANSFER (ta, 1);
1625 return 1;
1626 }
1627 else
1628 return 0;
1629}
1630
1631static void
1632api_trace (SV *coro_sv, int flags)
1633{
1634 dTHX;
1635 struct coro *coro = SvSTATE (coro_sv);
1636
1637 if (flags & CC_TRACE)
1638 {
1639 if (!coro->cctx)
1640 coro->cctx = cctx_new ();
1641 else if (!(coro->cctx->flags & CC_TRACE))
1642 croak ("cannot enable tracing on coroutine with custom stack");
1643
1644 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1645 }
1646 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1647 {
1648 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1649
1650 if (coro->flags & CF_RUNNING)
1651 PL_runops = RUNOPS_DEFAULT;
1652 else
1653 coro->slot->runops = RUNOPS_DEFAULT;
1654 }
1655}
1656
1657#if 0
1658static int
1659coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1660{
1661 AV *padlist;
1662 AV *av = (AV *)mg->mg_obj;
1663
1664 abort ();
1665
1666 return 0;
1667}
1668
1669static MGVTBL coro_gensub_vtbl = {
1670 0, 0, 0, 0,
1671 coro_gensub_free
1672};
1673#endif
1674
1675/*****************************************************************************/
1676/* PerlIO::cede */
1677
1678typedef struct
1679{
1680 PerlIOBuf base;
1681 NV next, every;
1682} PerlIOCede;
1683
1684static IV
1685PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1686{
1687 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1688
1689 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1690 self->next = nvtime () + self->every;
1691
1692 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1693}
1694
1695static SV *
1696PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1697{
1698 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1699
1700 return newSVnv (self->every);
1701}
1702
1703static IV
1704PerlIOCede_flush (pTHX_ PerlIO *f)
1705{
1706 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1707 double now = nvtime ();
1708
1709 if (now >= self->next)
1710 {
1711 api_cede ();
1712 self->next = now + self->every;
1713 }
1714
1715 return PerlIOBuf_flush (aTHX_ f);
1716}
1717
1718static PerlIO_funcs PerlIO_cede =
1719{
1720 sizeof(PerlIO_funcs),
1721 "cede",
1722 sizeof(PerlIOCede),
1723 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1724 PerlIOCede_pushed,
1725 PerlIOBuf_popped,
1726 PerlIOBuf_open,
1727 PerlIOBase_binmode,
1728 PerlIOCede_getarg,
1729 PerlIOBase_fileno,
1730 PerlIOBuf_dup,
1731 PerlIOBuf_read,
1732 PerlIOBuf_unread,
1733 PerlIOBuf_write,
1734 PerlIOBuf_seek,
1735 PerlIOBuf_tell,
1736 PerlIOBuf_close,
1737 PerlIOCede_flush,
1738 PerlIOBuf_fill,
1739 PerlIOBase_eof,
1740 PerlIOBase_error,
1741 PerlIOBase_clearerr,
1742 PerlIOBase_setlinebuf,
1743 PerlIOBuf_get_base,
1744 PerlIOBuf_bufsiz,
1745 PerlIOBuf_get_ptr,
1746 PerlIOBuf_get_cnt,
1747 PerlIOBuf_set_ptrcnt,
1748};
1749
1750
985MODULE = Coro::State PACKAGE = Coro::State 1751MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
986 1752
987PROTOTYPES: DISABLE 1753PROTOTYPES: DISABLE
988 1754
989BOOT: 1755BOOT:
990{ 1756{
991#ifdef USE_ITHREADS 1757#ifdef USE_ITHREADS
992 MUTEX_INIT (&coro_mutex); 1758 MUTEX_INIT (&coro_lock);
993#endif 1759#endif
994 BOOT_PAGESIZE; 1760 BOOT_PAGESIZE;
995 1761
1762 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1763 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1764
1765 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1766 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1767 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1768
1769 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1770 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1771 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1772
996 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1773 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
997 1774
998 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1775 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
999 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1776 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1000 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1777 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1778 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1001 1779
1002 main_mainstack = PL_mainstack; 1780 main_mainstack = PL_mainstack;
1781 main_top_env = PL_top_env;
1003 1782
1783 while (main_top_env->je_prev)
1784 main_top_env = main_top_env->je_prev;
1785
1004 coroapi.ver = CORO_API_VERSION; 1786 coroapi.ver = CORO_API_VERSION;
1787 coroapi.rev = CORO_API_REVISION;
1005 coroapi.transfer = api_transfer; 1788 coroapi.transfer = api_transfer;
1006 1789
1007 Newz (0, main_stack, 1, coro_stack); 1790 {
1008 main_stack->idle_sp = (void *)-1; 1791 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1792
1793 if (!svp) croak ("Time::HiRes is required");
1794 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1795
1796 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1797 }
1009 1798
1010 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1799 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011} 1800}
1012 1801
1013SV * 1802SV *
1014new (char *klass, ...) 1803new (char *klass, ...)
1015 CODE: 1804 CODE:
1016{ 1805{
1017 struct coro *coro; 1806 struct coro *coro;
1807 MAGIC *mg;
1018 HV *hv; 1808 HV *hv;
1019 int i; 1809 int i;
1020 1810
1021 Newz (0, coro, 1, struct coro); 1811 Newz (0, coro, 1, struct coro);
1022 coro->args = newAV (); 1812 coro->args = newAV ();
1813 coro->flags = CF_NEW;
1023 1814
1815 if (coro_first) coro_first->prev = coro;
1816 coro->next = coro_first;
1817 coro_first = coro;
1818
1024 hv = newHV (); 1819 coro->hv = hv = newHV ();
1025 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1820 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1821 mg->mg_flags |= MGf_DUP;
1026 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1822 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027 1823
1824 av_extend (coro->args, items - 1);
1028 for (i = 1; i < items; i++) 1825 for (i = 1; i < items; i++)
1029 av_push (coro->args, newSVsv (ST (i))); 1826 av_push (coro->args, newSVsv (ST (i)));
1030
1031 coro->stack = main_stack;
1032 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1033 /*coro->stack = 0;*/
1034} 1827}
1035 OUTPUT: 1828 OUTPUT:
1036 RETVAL 1829 RETVAL
1037 1830
1831# these not obviously related functions are all rolled into the same xs
1832# function to increase chances that they all will call transfer with the same
1833# stack offset
1038void 1834void
1039transfer (...) 1835_set_stacklevel (...)
1040 ALIAS: 1836 ALIAS:
1041 Coro::schedule = 1 1837 Coro::State::transfer = 1
1042 Coro::cede = 2 1838 Coro::schedule = 2
1043 _set_stacklevel = 3 1839 Coro::cede = 3
1840 Coro::cede_notself = 4
1044 CODE: 1841 CODE:
1045{ 1842{
1046 struct transfer_args ta; 1843 struct transfer_args ta;
1047 1844
1845 PUTBACK;
1048 switch (ix) 1846 switch (ix)
1049 { 1847 {
1050 case 0: 1848 case 0:
1051 if (items != 3) 1849 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1052 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1850 ta.next = 0;
1053
1054 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1055 break; 1851 break;
1056 1852
1057 case 1: 1853 case 1:
1058 prepare_schedule (&ta); 1854 if (items != 2)
1855 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1856
1857 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1059 break; 1858 break;
1060 1859
1061 case 2: 1860 case 2:
1062 prepare_cede (&ta); 1861 prepare_schedule (aTHX_ &ta);
1063 break; 1862 break;
1064 1863
1065 case 3: 1864 case 3:
1066 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1865 prepare_cede (aTHX_ &ta);
1067 ta.next = 0; 1866 break;
1068 ta.flags = TRANSFER_SET_STACKLEVEL; 1867
1868 case 4:
1869 if (!prepare_cede_notself (aTHX_ &ta))
1870 XSRETURN_EMPTY;
1871
1069 break; 1872 break;
1070 } 1873 }
1874 SPAGAIN;
1071 1875
1876 BARRIER;
1877 PUTBACK;
1072 TRANSFER (ta); 1878 TRANSFER (ta, 0);
1879 SPAGAIN; /* might be the sp of a different coroutine now */
1880 /* be extra careful not to ever do anything after TRANSFER */
1073} 1881}
1882
1883bool
1884_destroy (SV *coro_sv)
1885 CODE:
1886 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1887 OUTPUT:
1888 RETVAL
1074 1889
1075void 1890void
1076_clone_state_from (SV *dst, SV *src)
1077 CODE:
1078{
1079 struct coro *coro_src = SvSTATE (src);
1080
1081 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1082
1083 ++coro_src->refcnt;
1084 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1085}
1086
1087void
1088_nonlocal_goto (IV nextop)
1089 CODE:
1090 /* uuh, somebody will kill me again for this */
1091 PL_op->op_next = INT2PTR (OP *, nextop);
1092
1093void
1094_exit (code) 1891_exit (int code)
1095 int code
1096 PROTOTYPE: $ 1892 PROTOTYPE: $
1097 CODE: 1893 CODE:
1098 _exit (code); 1894 _exit (code);
1099 1895
1100MODULE = Coro::State PACKAGE = Coro::Cont 1896int
1897cctx_stacksize (int new_stacksize = 0)
1898 CODE:
1899 RETVAL = cctx_stacksize;
1900 if (new_stacksize)
1901 {
1902 cctx_stacksize = new_stacksize;
1903 ++cctx_gen;
1904 }
1905 OUTPUT:
1906 RETVAL
1907
1908int
1909cctx_max_idle (int max_idle = 0)
1910 CODE:
1911 RETVAL = cctx_max_idle;
1912 if (max_idle > 1)
1913 cctx_max_idle = max_idle;
1914 OUTPUT:
1915 RETVAL
1916
1917int
1918cctx_count ()
1919 CODE:
1920 RETVAL = cctx_count;
1921 OUTPUT:
1922 RETVAL
1923
1924int
1925cctx_idle ()
1926 CODE:
1927 RETVAL = cctx_idle;
1928 OUTPUT:
1929 RETVAL
1101 1930
1102void 1931void
1103yield (...) 1932list ()
1104 PROTOTYPE: @ 1933 PPCODE:
1934{
1935 struct coro *coro;
1936 for (coro = coro_first; coro; coro = coro->next)
1937 if (coro->hv)
1938 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1939}
1940
1941void
1942call (Coro::State coro, SV *coderef)
1943 ALIAS:
1944 eval = 1
1945 CODE:
1946{
1947 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1948 {
1949 struct coro temp;
1950
1951 if (!(coro->flags & CF_RUNNING))
1952 {
1953 PUTBACK;
1954 save_perl (aTHX_ &temp);
1955 load_perl (aTHX_ coro);
1956 }
1957
1958 {
1959 dSP;
1960 ENTER;
1961 SAVETMPS;
1962 PUTBACK;
1963 PUSHSTACK;
1964 PUSHMARK (SP);
1965
1966 if (ix)
1967 eval_sv (coderef, 0);
1968 else
1969 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1970
1971 POPSTACK;
1972 SPAGAIN;
1973 FREETMPS;
1974 LEAVE;
1975 PUTBACK;
1976 }
1977
1978 if (!(coro->flags & CF_RUNNING))
1979 {
1980 save_perl (aTHX_ coro);
1981 load_perl (aTHX_ &temp);
1982 SPAGAIN;
1983 }
1984 }
1985}
1986
1987SV *
1988is_ready (Coro::State coro)
1989 PROTOTYPE: $
1990 ALIAS:
1991 is_ready = CF_READY
1992 is_running = CF_RUNNING
1993 is_new = CF_NEW
1994 is_destroyed = CF_DESTROYED
1995 CODE:
1996 RETVAL = boolSV (coro->flags & ix);
1997 OUTPUT:
1998 RETVAL
1999
2000void
2001api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2002
2003SV *
2004has_cctx (Coro::State coro)
2005 PROTOTYPE: $
2006 CODE:
2007 RETVAL = boolSV (!!coro->cctx);
2008 OUTPUT:
2009 RETVAL
2010
2011int
2012is_traced (Coro::State coro)
2013 PROTOTYPE: $
2014 CODE:
2015 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2016 OUTPUT:
2017 RETVAL
2018
2019UV
2020rss (Coro::State coro)
2021 PROTOTYPE: $
2022 ALIAS:
2023 usecount = 1
1105 CODE: 2024 CODE:
1106{ 2025 switch (ix)
1107 SV *yieldstack; 2026 {
1108 SV *sv; 2027 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1109 AV *defav = GvAV (PL_defgv); 2028 case 1: RETVAL = coro->usecount; break;
1110 struct coro *prev, *next;
1111
1112 yieldstack = *hv_fetch (
1113 (HV *)SvRV (GvSV (coro_current)),
1114 "yieldstack", sizeof ("yieldstack") - 1,
1115 0 2029 }
2030 OUTPUT:
2031 RETVAL
2032
2033void
2034force_cctx ()
2035 CODE:
2036 struct coro *coro = SvSTATE (coro_current);
2037 coro->cctx->idle_sp = 0;
2038
2039void
2040swap_defsv (Coro::State self)
2041 PROTOTYPE: $
2042 ALIAS:
2043 swap_defav = 1
2044 CODE:
2045 if (!self->slot)
2046 croak ("cannot swap state with coroutine that has no saved state");
2047 else
1116 ); 2048 {
2049 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2050 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1117 2051
1118 /* set up @_ -- ugly */ 2052 SV *tmp = *src; *src = *dst; *dst = tmp;
1119 av_clear (defav); 2053 }
1120 av_fill (defav, items - 1);
1121 while (items--)
1122 av_store (defav, items, SvREFCNT_inc (ST(items)));
1123
1124 sv = av_pop ((AV *)SvRV (yieldstack));
1125 prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1126 next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1127 SvREFCNT_dec (sv);
1128
1129 coro_state_transfer (aTHX_ prev, next, 0);
1130}
1131 2054
1132MODULE = Coro::State PACKAGE = Coro 2055MODULE = Coro::State PACKAGE = Coro
1133 2056
1134BOOT: 2057BOOT:
1135{ 2058{
1136 int i; 2059 int i;
1137 2060
2061 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2062 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2063 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2064
2065 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2066 SvREADONLY_on (coro_current);
2067
1138 coro_stash = gv_stashpv ("Coro", TRUE); 2068 coro_stash = gv_stashpv ("Coro", TRUE);
1139 2069
1140 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2070 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1141 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2071 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1142 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2072 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1143 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2073 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1144 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2074 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1145 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2075 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1146 2076
1147 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1148 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1149
1150 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2077 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1151 coro_ready[i] = newAV (); 2078 coro_ready[i] = newAV ();
1152 2079
1153 { 2080 {
1154 SV *sv = perl_get_sv("Coro::API", 1); 2081 SV *sv = perl_get_sv ("Coro::API", TRUE);
2082 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1155 2083
1156 coroapi.schedule = api_schedule; 2084 coroapi.schedule = api_schedule;
1157 coroapi.cede = api_cede; 2085 coroapi.cede = api_cede;
2086 coroapi.cede_notself = api_cede_notself;
1158 coroapi.ready = api_ready; 2087 coroapi.ready = api_ready;
2088 coroapi.is_ready = api_is_ready;
1159 coroapi.nready = &coro_nready; 2089 coroapi.nready = &coro_nready;
1160 coroapi.current = coro_current; 2090 coroapi.current = coro_current;
1161 2091
1162 GCoroAPI = &coroapi; 2092 GCoroAPI = &coroapi;
1163 sv_setiv (sv, (IV)&coroapi); 2093 sv_setiv (sv, (IV)&coroapi);
1164 SvREADONLY_on (sv); 2094 SvREADONLY_on (sv);
1165 } 2095 }
1166} 2096}
2097
2098void
2099_set_current (SV *current)
2100 PROTOTYPE: $
2101 CODE:
2102 SvREFCNT_dec (SvRV (coro_current));
2103 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2104
2105void
2106_set_readyhook (SV *hook)
2107 PROTOTYPE: $
2108 CODE:
2109 LOCK;
2110 SvREFCNT_dec (coro_readyhook);
2111 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2112 UNLOCK;
1167 2113
1168int 2114int
1169prio (Coro::State coro, int newprio = 0) 2115prio (Coro::State coro, int newprio = 0)
1170 ALIAS: 2116 ALIAS:
1171 nice = 1 2117 nice = 1
… …
1174 RETVAL = coro->prio; 2120 RETVAL = coro->prio;
1175 2121
1176 if (items > 1) 2122 if (items > 1)
1177 { 2123 {
1178 if (ix) 2124 if (ix)
1179 newprio += coro->prio; 2125 newprio = coro->prio - newprio;
1180 2126
1181 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2127 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1182 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2128 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1183 2129
1184 coro->prio = newprio; 2130 coro->prio = newprio;
1185 } 2131 }
1186} 2132}
2133 OUTPUT:
2134 RETVAL
1187 2135
1188void 2136SV *
1189ready (SV *self) 2137ready (SV *self)
1190 PROTOTYPE: $ 2138 PROTOTYPE: $
1191 CODE: 2139 CODE:
1192 api_ready (self); 2140 RETVAL = boolSV (api_ready (self));
2141 OUTPUT:
2142 RETVAL
1193 2143
1194int 2144int
1195nready (...) 2145nready (...)
1196 PROTOTYPE: 2146 PROTOTYPE:
1197 CODE: 2147 CODE:
1198 RETVAL = coro_nready; 2148 RETVAL = coro_nready;
1199 OUTPUT: 2149 OUTPUT:
1200 RETVAL 2150 RETVAL
1201 2151
1202MODULE = Coro::State PACKAGE = Coro::AIO 2152void
2153throw (Coro::State self, SV *throw = &PL_sv_undef)
2154 PROTOTYPE: $;$
2155 CODE:
2156 SvREFCNT_dec (self->throw);
2157 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2158
2159# for async_pool speedup
2160void
2161_pool_1 (SV *cb)
2162 CODE:
2163{
2164 struct coro *coro = SvSTATE (coro_current);
2165 HV *hv = (HV *)SvRV (coro_current);
2166 AV *defav = GvAV (PL_defgv);
2167 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2168 AV *invoke_av;
2169 int i, len;
2170
2171 if (!invoke)
2172 {
2173 SV *old = PL_diehook;
2174 PL_diehook = 0;
2175 SvREFCNT_dec (old);
2176 croak ("\3async_pool terminate\2\n");
2177 }
2178
2179 SvREFCNT_dec (coro->saved_deffh);
2180 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2181
2182 hv_store (hv, "desc", sizeof ("desc") - 1,
2183 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2184
2185 invoke_av = (AV *)SvRV (invoke);
2186 len = av_len (invoke_av);
2187
2188 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2189
2190 if (len > 0)
2191 {
2192 av_fill (defav, len - 1);
2193 for (i = 0; i < len; ++i)
2194 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2195 }
2196
2197 SvREFCNT_dec (invoke);
2198}
2199
2200void
2201_pool_2 (SV *cb)
2202 CODE:
2203{
2204 struct coro *coro = SvSTATE (coro_current);
2205
2206 sv_setsv (cb, &PL_sv_undef);
2207
2208 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2209 coro->saved_deffh = 0;
2210
2211 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2212 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2213 {
2214 SV *old = PL_diehook;
2215 PL_diehook = 0;
2216 SvREFCNT_dec (old);
2217 croak ("\3async_pool terminate\2\n");
2218 }
2219
2220 av_clear (GvAV (PL_defgv));
2221 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2222 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2223
2224 coro->prio = 0;
2225
2226 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2227 api_trace (coro_current, 0);
2228
2229 av_push (av_async_pool, newSVsv (coro_current));
2230}
2231
2232#if 0
2233
2234void
2235_generator_call (...)
2236 PROTOTYPE: @
2237 PPCODE:
2238 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2239 xxxx
2240 abort ();
1203 2241
1204SV * 2242SV *
1205_get_state () 2243gensub (SV *sub, ...)
1206 CODE: 2244 PROTOTYPE: &;@
2245 CODE:
1207{ 2246{
1208 struct { 2247 struct coro *coro;
1209 int errorno; 2248 MAGIC *mg;
1210 int laststype; 2249 CV *xcv;
1211 int laststatval; 2250 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1212 Stat_t statcache; 2251 int i;
1213 } data;
1214 2252
1215 data.errorno = errno; 2253 CvGV (ncv) = CvGV (cv);
1216 data.laststype = PL_laststype; 2254 CvFILE (ncv) = CvFILE (cv);
1217 data.laststatval = PL_laststatval;
1218 data.statcache = PL_statcache;
1219 2255
1220 RETVAL = newSVpvn ((char *)&data, sizeof data); 2256 Newz (0, coro, 1, struct coro);
2257 coro->args = newAV ();
2258 coro->flags = CF_NEW;
2259
2260 av_extend (coro->args, items - 1);
2261 for (i = 1; i < items; i++)
2262 av_push (coro->args, newSVsv (ST (i)));
2263
2264 CvISXSUB_on (ncv);
2265 CvXSUBANY (ncv).any_ptr = (void *)coro;
2266
2267 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2268
2269 CvXSUB (ncv) = CvXSUB (xcv);
2270 CvANON_on (ncv);
2271
2272 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2273 RETVAL = newRV_noinc ((SV *)ncv);
1221} 2274}
1222 OUTPUT: 2275 OUTPUT:
1223 RETVAL 2276 RETVAL
1224 2277
2278#endif
2279
2280
2281MODULE = Coro::State PACKAGE = Coro::AIO
2282
1225void 2283void
1226_set_state (char *data_) 2284_get_state (SV *self)
2285 PPCODE:
2286{
2287 AV *defav = GvAV (PL_defgv);
2288 AV *av = newAV ();
2289 int i;
2290 SV *data_sv = newSV (sizeof (struct io_state));
2291 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2292 SvCUR_set (data_sv, sizeof (struct io_state));
2293 SvPOK_only (data_sv);
2294
2295 data->errorno = errno;
2296 data->laststype = PL_laststype;
2297 data->laststatval = PL_laststatval;
2298 data->statcache = PL_statcache;
2299
2300 av_extend (av, AvFILLp (defav) + 1 + 1);
2301
2302 for (i = 0; i <= AvFILLp (defav); ++i)
2303 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2304
2305 av_push (av, data_sv);
2306
2307 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2308
2309 api_ready (self);
2310}
2311
2312void
2313_set_state (SV *state)
1227 PROTOTYPE: $ 2314 PROTOTYPE: $
2315 PPCODE:
2316{
2317 AV *av = (AV *)SvRV (state);
2318 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2319 int i;
2320
2321 errno = data->errorno;
2322 PL_laststype = data->laststype;
2323 PL_laststatval = data->laststatval;
2324 PL_statcache = data->statcache;
2325
2326 EXTEND (SP, AvFILLp (av));
2327 for (i = 0; i < AvFILLp (av); ++i)
2328 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2329}
2330
2331
2332MODULE = Coro::State PACKAGE = Coro::AnyEvent
2333
2334BOOT:
2335 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2336
2337SV *
2338_schedule (...)
2339 PROTOTYPE: @
1228 CODE: 2340 CODE:
1229{ 2341{
1230 struct { 2342 static int incede;
1231 int errorno;
1232 int laststype;
1233 int laststatval;
1234 Stat_t statcache;
1235 } *data = (void *)data_;
1236 2343
1237 errno = data->errorno; 2344 api_cede_notself ();
1238 PL_laststype = data->laststype; 2345
1239 PL_laststatval = data->laststatval; 2346 ++incede;
1240 PL_statcache = data->statcache; 2347 while (coro_nready >= incede && api_cede ())
2348 ;
2349
2350 sv_setsv (sv_activity, &PL_sv_undef);
2351 if (coro_nready >= incede)
2352 {
2353 PUSHMARK (SP);
2354 PUTBACK;
2355 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2356 SPAGAIN;
2357 }
2358
2359 --incede;
1241} 2360}
2361
2362
2363MODULE = Coro::State PACKAGE = PerlIO::cede
2364
2365BOOT:
2366 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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