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Comparing Coro/Coro/State.xs (file contents):
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC vs.
Revision 1.238 by root, Sat May 31 12:10:55 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 <stdio.h> 85/* 5.8.8 */
33#include <errno.h> 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
34 102
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 103#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD 104# 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 105#endif
53# include <limits.h> 106
54# ifndef PAGESIZE 107#ifndef CORO_STACKGUARD
55# define PAGESIZE pagesize 108# define CORO_STACKGUARD 0
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize;
58# else
59# define BOOT_PAGESIZE
60# endif 109#endif
61#endif
62 110
63/* The next macro should declare a variable stacklevel that contains and approximation 111/* prefer perl internal functions over our own? */
64 * to the current C stack pointer. Its property is that it changes with each call 112#ifndef CORO_PREFER_PERL_FUNCTIONS
65 * and should be unique. */ 113# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif
115
116/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */
66#define dSTACKLEVEL int stacklevel 118#define dSTACKLEVEL volatile char stacklevel
67#define STACKLEVEL ((void *)&stacklevel) 119#define STACKLEVEL ((void *)&stacklevel)
68 120
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
70 122
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))
137
71#include "CoroAPI.h" 138#include "CoroAPI.h"
72
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74 139
75#ifdef USE_ITHREADS 140#ifdef USE_ITHREADS
76static perl_mutex coro_mutex; 141static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else 144#else
80# define LOCK (void)0 145# define LOCK (void)0
81# define UNLOCK (void)0 146# define UNLOCK (void)0
82#endif 147#endif
83 148
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;
84static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
85static 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;
86static HV *coro_state_stash, *coro_stash; 162static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 163static volatile SV *coro_mortal; /* will be freed after next transfer */
164
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};
88 190
89/* this is a structure representing a c-level coroutine */ 191/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 192typedef struct coro_cctx {
91 struct coro_stack *next; 193 struct coro_cctx *next;
92 194
93 /* the stack */ 195 /* the stack */
94 void *sptr; 196 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 197 size_t ssize;
96 198
97 /* cpu state */ 199 /* cpu state */
98 void *idle_sp; /* original stacklevel when coroutine was created */ 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 */
99 JMPENV *top_env; 202 JMPENV *top_env;
100 coro_context cctx; 203 coro_context cctx;
101} coro_stack;
102 204
103/* the (fake) coro_stack representing the main program */ 205#if CORO_USE_VALGRIND
104static coro_stack *main_stack; 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 */
219typedef struct {
220 SV *defsv;
221 AV *defav;
222 SV *errsv;
223 SV *irsgv;
224#define VAR(name,type) type name;
225# include "state.h"
226#undef VAR
227} perl_slots;
228
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
105 230
106/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
107struct coro { 232struct coro {
108 /* the c coroutine allocated to this perl coroutine, if any */ 233 /* the c coroutine allocated to this perl coroutine, if any */
109 coro_stack *stack; 234 coro_cctx *cctx;
110 235
111 /* data associated with this coroutine (initial args) */ 236 /* process data */
112 AV *args;
113 int refcnt;
114
115 /* optionally saved, might be zero */
116 AV *defav;
117 SV *defsv;
118 SV *errsv;
119
120 /* saved global state not related to stacks */
121 U8 dowarn;
122 I32 in_eval;
123
124 /* the stacks and related info (callchain etc..) */
125 PERL_SI *curstackinfo;
126 AV *curstack;
127 AV *mainstack; 237 AV *mainstack;
128 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
129 OP *op; 239
130 SV **curpad; 240 AV *args; /* data associated with this coroutine (initial args) */
131 AV *comppad; 241 int refcnt; /* coroutines are refcounted, yes */
132 CV *compcv; 242 int flags; /* CF_ flags */
133 SV **stack_base; 243 HV *hv; /* the perl hash associated with this coro, if any */
134 SV **stack_max; 244
135 SV **tmps_stack; 245 /* statistics */
136 I32 tmps_floor; 246 int usecount; /* number of transfers to this coro */
137 I32 tmps_ix;
138 I32 tmps_max;
139 I32 *markstack;
140 I32 *markstack_ptr;
141 I32 *markstack_max;
142 I32 *scopestack;
143 I32 scopestack_ix;
144 I32 scopestack_max;
145 ANY *savestack;
146 I32 savestack_ix;
147 I32 savestack_max;
148 OP **retstack;
149 I32 retstack_ix;
150 I32 retstack_max;
151 PMOP *curpm;
152 COP *curcop;
153 247
154 /* coro process data */ 248 /* coro process data */
155 int prio; 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;
156}; 257};
157 258
158typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
159typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
160 261
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
161static AV * 310static AV *
162coro_clone_padlist (pTHX_ CV *cv) 311coro_clone_padlist (pTHX_ CV *cv)
163{ 312{
164 AV *padlist = CvPADLIST (cv); 313 AV *padlist = CvPADLIST (cv);
165 AV *newpadlist, *newpad; 314 AV *newpadlist, *newpad;
166 315
167 newpadlist = newAV (); 316 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
169#if PERL_VERSION < 9 318#if PERL_VERSION_ATLEAST (5,10,0)
319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
320#else
170 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173#endif 322#endif
174 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175 --AvFILLp (padlist); 324 --AvFILLp (padlist);
176 325
177 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
… …
212 361
213 /* casting is fun. */ 362 /* casting is fun. */
214 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215 free_padlist (aTHX_ padlist); 364 free_padlist (aTHX_ padlist);
216 365
217 SvREFCNT_dec (av);
218
219 return 0; 366 return 0;
220} 367}
221 368
222#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
223 371
224static 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))
225 412
226/* the next two functions merely cache the padlists */ 413/* the next two functions merely cache the padlists */
227static void 414static void
228get_padlist (pTHX_ CV *cv) 415get_padlist (pTHX_ CV *cv)
229{ 416{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 417 MAGIC *mg = CORO_MAGIC_cv (cv);
418 AV *av;
231 419
232 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
233 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234 else 422 else
235 { 423 {
236#if 0 424#if CORO_PREFER_PERL_FUNCTIONS
237 /* this should work - but it doesn't :( */ 425 /* this is probably cleaner, but also slower? */
238 CV *cp = Perl_cv_clone (aTHX_ cv); 426 CV *cp = Perl_cv_clone (cv);
239 CvPADLIST (cv) = CvPADLIST (cp); 427 CvPADLIST (cv) = CvPADLIST (cp);
240 CvPADLIST (cp) = 0; 428 CvPADLIST (cp) = 0;
241 SvREFCNT_dec (cp); 429 SvREFCNT_dec (cp);
242#else 430#else
243 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
246} 434}
247 435
248static void 436static void
249put_padlist (pTHX_ CV *cv) 437put_padlist (pTHX_ CV *cv)
250{ 438{
251 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 439 MAGIC *mg = CORO_MAGIC_cv (cv);
440 AV *av;
252 441
253 if (!mg) 442 if (expect_false (!mg))
254 { 443 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
255 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257 mg->mg_virtual = &vtbl_coro;
258 mg->mg_obj = (SV *)newAV ();
259 }
260 444
261 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 445 av = (AV *)mg->mg_obj;
262}
263 446
264#define SB do { 447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
265#define SE } while (0) 448 av_extend (av, AvMAX (av) + 1);
266 449
267#define LOAD(state) load_state(aTHX_ (state)); 450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
268#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 451}
269 452
270#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 453/** load & save, init *******************************************************/
271 454
272static void 455static void
273load_state(pTHX_ Coro__State c) 456load_perl (pTHX_ Coro__State c)
274{ 457{
275 PL_dowarn = c->dowarn; 458 perl_slots *slot = c->slot;
276 PL_in_eval = c->in_eval; 459 c->slot = 0;
277 460
278 PL_curstackinfo = c->curstackinfo;
279 PL_curstack = c->curstack;
280 PL_mainstack = c->mainstack; 461 PL_mainstack = c->mainstack;
281 PL_stack_sp = c->stack_sp;
282 PL_op = c->op;
283 PL_curpad = c->curpad;
284 PL_comppad = c->comppad;
285 PL_compcv = c->compcv;
286 PL_stack_base = c->stack_base;
287 PL_stack_max = c->stack_max;
288 PL_tmps_stack = c->tmps_stack;
289 PL_tmps_floor = c->tmps_floor;
290 PL_tmps_ix = c->tmps_ix;
291 PL_tmps_max = c->tmps_max;
292 PL_markstack = c->markstack;
293 PL_markstack_ptr = c->markstack_ptr;
294 PL_markstack_max = c->markstack_max;
295 PL_scopestack = c->scopestack;
296 PL_scopestack_ix = c->scopestack_ix;
297 PL_scopestack_max = c->scopestack_max;
298 PL_savestack = c->savestack;
299 PL_savestack_ix = c->savestack_ix;
300 PL_savestack_max = c->savestack_max;
301#if PERL_VERSION < 9
302 PL_retstack = c->retstack;
303 PL_retstack_ix = c->retstack_ix;
304 PL_retstack_max = c->retstack_max;
305#endif
306 PL_curpm = c->curpm;
307 PL_curcop = c->curcop;
308 462
309 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 463 GvSV (PL_defgv) = slot->defsv;
310 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 464 GvAV (PL_defgv) = slot->defav;
311 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
312 471
313 { 472 {
314 dSP; 473 dSP;
474
315 CV *cv; 475 CV *cv;
316 476
317 /* now do the ugly restore mess */ 477 /* now do the ugly restore mess */
318 while ((cv = (CV *)POPs)) 478 while (expect_true (cv = (CV *)POPs))
319 { 479 {
320 AV *padlist = (AV *)POPs;
321
322 if (padlist)
323 {
324 put_padlist (aTHX_ cv); /* mark this padlist as available */ 480 put_padlist (aTHX_ cv); /* mark this padlist as available */
325 CvPADLIST(cv) = padlist; 481 CvDEPTH (cv) = PTR2IV (POPs);
326 } 482 CvPADLIST (cv) = (AV *)POPs;
327
328 ++CvDEPTH(cv);
329 } 483 }
330 484
331 PUTBACK; 485 PUTBACK;
332 } 486 }
333} 487}
334 488
335static void 489static void
336save_state(pTHX_ Coro__State c, int flags) 490save_perl (pTHX_ Coro__State c)
337{ 491{
338 { 492 {
339 dSP; 493 dSP;
340 I32 cxix = cxstack_ix; 494 I32 cxix = cxstack_ix;
341 PERL_CONTEXT *ccstk = cxstack; 495 PERL_CONTEXT *ccstk = cxstack;
… …
344 /* 498 /*
345 * 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
346 * (and reinitialize) all cv's in the whole callchain :( 500 * (and reinitialize) all cv's in the whole callchain :(
347 */ 501 */
348 502
349 PUSHs (Nullsv); 503 XPUSHs (Nullsv);
350 /* this loop was inspired by pp_caller */ 504 /* this loop was inspired by pp_caller */
351 for (;;) 505 for (;;)
352 { 506 {
353 while (cxix >= 0) 507 while (expect_true (cxix >= 0))
354 { 508 {
355 PERL_CONTEXT *cx = &ccstk[cxix--]; 509 PERL_CONTEXT *cx = &ccstk[cxix--];
356 510
357 if (CxTYPE(cx) == CXt_SUB) 511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
358 { 512 {
359 CV *cv = cx->blk_sub.cv; 513 CV *cv = cx->blk_sub.cv;
514
360 if (CvDEPTH(cv)) 515 if (expect_true (CvDEPTH (cv)))
361 { 516 {
362 EXTEND (SP, CvDEPTH(cv)*2); 517 EXTEND (SP, 3);
363
364 while (--CvDEPTH(cv))
365 {
366 /* this tells the restore code to increment CvDEPTH */
367 PUSHs (Nullsv);
368 PUSHs ((SV *)cv);
369 }
370
371 PUSHs ((SV *)CvPADLIST(cv)); 518 PUSHs ((SV *)CvPADLIST (cv));
519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
372 PUSHs ((SV *)cv); 520 PUSHs ((SV *)cv);
373 521
522 CvDEPTH (cv) = 0;
374 get_padlist (aTHX_ cv); 523 get_padlist (aTHX_ cv);
375 } 524 }
376 } 525 }
377#ifdef CXt_FORMAT
378 else if (CxTYPE(cx) == CXt_FORMAT)
379 {
380 /* I never used formats, so how should I know how these are implemented? */
381 /* my bold guess is as a simple, plain sub... */
382 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383 }
384#endif
385 } 526 }
386 527
387 if (top_si->si_type == PERLSI_MAIN) 528 if (expect_true (top_si->si_type == PERLSI_MAIN))
388 break; 529 break;
389 530
390 top_si = top_si->si_prev; 531 top_si = top_si->si_prev;
391 ccstk = top_si->si_cxstack; 532 ccstk = top_si->si_cxstack;
392 cxix = top_si->si_cxix; 533 cxix = top_si->si_cxix;
393 } 534 }
394 535
395 PUTBACK; 536 PUTBACK;
396 } 537 }
397 538
398 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 539 /* allocate some space on the context stack for our purposes */
399 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 540 /* we manually unroll here, as usually 2 slots is enough */
400 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 */
401 550
402 c->dowarn = PL_dowarn;
403 c->in_eval = PL_in_eval;
404
405 c->curstackinfo = PL_curstackinfo;
406 c->curstack = PL_curstack;
407 c->mainstack = PL_mainstack; 551 c->mainstack = PL_mainstack;
408 c->stack_sp = PL_stack_sp; 552
409 c->op = PL_op; 553 {
410 c->curpad = PL_curpad; 554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
411 c->comppad = PL_comppad; 555
412 c->compcv = PL_compcv; 556 slot->defav = GvAV (PL_defgv);
413 c->stack_base = PL_stack_base; 557 slot->defsv = DEFSV;
414 c->stack_max = PL_stack_max; 558 slot->errsv = ERRSV;
415 c->tmps_stack = PL_tmps_stack; 559 slot->irsgv = GvSV (irsgv);
416 c->tmps_floor = PL_tmps_floor; 560
417 c->tmps_ix = PL_tmps_ix; 561 #define VAR(name,type) slot->name = PL_ ## name;
418 c->tmps_max = PL_tmps_max; 562 # include "state.h"
419 c->markstack = PL_markstack; 563 #undef VAR
420 c->markstack_ptr = PL_markstack_ptr; 564 }
421 c->markstack_max = PL_markstack_max;
422 c->scopestack = PL_scopestack;
423 c->scopestack_ix = PL_scopestack_ix;
424 c->scopestack_max = PL_scopestack_max;
425 c->savestack = PL_savestack;
426 c->savestack_ix = PL_savestack_ix;
427 c->savestack_max = PL_savestack_max;
428#if PERL_VERSION < 9
429 c->retstack = PL_retstack;
430 c->retstack_ix = PL_retstack_ix;
431 c->retstack_max = PL_retstack_max;
432#endif
433 c->curpm = PL_curpm;
434 c->curcop = PL_curcop;
435} 565}
436 566
437/* 567/*
438 * allocate various perl stacks. This is an exact copy 568 * allocate various perl stacks. This is an exact copy
439 * of perl.c:init_stacks, except that it uses less memory 569 * of perl.c:init_stacks, except that it uses less memory
440 * on the (sometimes correct) assumption that coroutines do 570 * on the (sometimes correct) assumption that coroutines do
441 * not usually need a lot of stackspace. 571 * not usually need a lot of stackspace.
442 */ 572 */
573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
443static void 576static void
444coro_init_stacks (pTHX) 577coro_init_stacks (pTHX)
445{ 578{
446 LOCK; 579 PL_curstackinfo = new_stackinfo(32, 8);
447
448 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
449 PL_curstackinfo->si_type = PERLSI_MAIN; 580 PL_curstackinfo->si_type = PERLSI_MAIN;
450 PL_curstack = PL_curstackinfo->si_stack; 581 PL_curstack = PL_curstackinfo->si_stack;
451 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
452 583
453 PL_stack_base = AvARRAY(PL_curstack); 584 PL_stack_base = AvARRAY(PL_curstack);
454 PL_stack_sp = PL_stack_base; 585 PL_stack_sp = PL_stack_base;
455 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
456 587
457 New(50,PL_tmps_stack,96,SV*); 588 New(50,PL_tmps_stack,32,SV*);
458 PL_tmps_floor = -1; 589 PL_tmps_floor = -1;
459 PL_tmps_ix = -1; 590 PL_tmps_ix = -1;
460 PL_tmps_max = 96; 591 PL_tmps_max = 32;
461 592
462 New(54,PL_markstack,16,I32); 593 New(54,PL_markstack,16,I32);
463 PL_markstack_ptr = PL_markstack; 594 PL_markstack_ptr = PL_markstack;
464 PL_markstack_max = PL_markstack + 16; 595 PL_markstack_max = PL_markstack + 16;
465 596
466#ifdef SET_MARK_OFFSET 597#ifdef SET_MARK_OFFSET
467 SET_MARK_OFFSET; 598 SET_MARK_OFFSET;
468#endif 599#endif
469 600
470 New(54,PL_scopestack,16,I32); 601 New(54,PL_scopestack,8,I32);
471 PL_scopestack_ix = 0; 602 PL_scopestack_ix = 0;
472 PL_scopestack_max = 16; 603 PL_scopestack_max = 8;
473 604
474 New(54,PL_savestack,96,ANY); 605 New(54,PL_savestack,24,ANY);
475 PL_savestack_ix = 0; 606 PL_savestack_ix = 0;
476 PL_savestack_max = 96; 607 PL_savestack_max = 24;
477 608
478#if PERL_VERSION < 9 609#if !PERL_VERSION_ATLEAST (5,10,0)
479 New(54,PL_retstack,8,OP*); 610 New(54,PL_retstack,4,OP*);
480 PL_retstack_ix = 0; 611 PL_retstack_ix = 0;
481 PL_retstack_max = 8; 612 PL_retstack_max = 4;
482#endif 613#endif
483
484 UNLOCK;
485} 614}
615#endif
486 616
487/* 617/*
488 * destroy the stacks, the callchain etc... 618 * destroy the stacks, the callchain etc...
489 */ 619 */
490static void 620static void
491destroy_stacks(pTHX) 621coro_destroy_stacks (pTHX)
492{ 622{
493 if (!IN_DESTRUCT)
494 {
495 /* is this ugly, I ask? */
496 LEAVE_SCOPE (0);
497
498 /* sure it is, but more important: is it correct?? :/ */
499 FREETMPS;
500
501 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
502 }
503
504 while (PL_curstackinfo->si_next) 623 while (PL_curstackinfo->si_next)
505 PL_curstackinfo = PL_curstackinfo->si_next; 624 PL_curstackinfo = PL_curstackinfo->si_next;
506 625
507 while (PL_curstackinfo) 626 while (PL_curstackinfo)
508 { 627 {
509 PERL_SI *p = PL_curstackinfo->si_prev; 628 PERL_SI *p = PL_curstackinfo->si_prev;
510 629
511 { /*D*//*remove*/
512 dSP;
513 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
514 PUTBACK; /* possibly superfluous */
515 }
516
517 if (!IN_DESTRUCT) 630 if (!IN_DESTRUCT)
518 {
519 dounwind (-1);/*D*//*remove*/
520 SvREFCNT_dec (PL_curstackinfo->si_stack); 631 SvREFCNT_dec (PL_curstackinfo->si_stack);
521 }
522 632
523 Safefree (PL_curstackinfo->si_cxstack); 633 Safefree (PL_curstackinfo->si_cxstack);
524 Safefree (PL_curstackinfo); 634 Safefree (PL_curstackinfo);
525 PL_curstackinfo = p; 635 PL_curstackinfo = p;
526 } 636 }
527 637
528 Safefree (PL_tmps_stack); 638 Safefree (PL_tmps_stack);
529 Safefree (PL_markstack); 639 Safefree (PL_markstack);
530 Safefree (PL_scopestack); 640 Safefree (PL_scopestack);
531 Safefree (PL_savestack); 641 Safefree (PL_savestack);
532#if PERL_VERSION < 9 642#if !PERL_VERSION_ATLEAST (5,10,0)
533 Safefree (PL_retstack); 643 Safefree (PL_retstack);
534#endif 644#endif
535} 645}
536 646
647static size_t
648coro_rss (pTHX_ struct coro *coro)
649{
650 size_t rss = sizeof (*coro);
651
652 if (coro->mainstack)
653 {
654 perl_slots tmp_slot;
655 perl_slots *slot;
656
657 if (coro->flags & CF_RUNNING)
658 {
659 slot = &tmp_slot;
660
661 #define VAR(name,type) slot->name = PL_ ## name;
662 # include "state.h"
663 #undef VAR
664 }
665 else
666 slot = coro->slot;
667
668 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY);
675
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *);
678#endif
679 }
680
681 return rss;
682}
683
684/** coroutine stack handling ************************************************/
685
686static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
687static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
688
689/* apparently < 5.8.8 */
690#undef MgPV_nolen_const
691#ifndef MgPV_nolen_const
692#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
693 SvPV_nolen_const((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 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
714 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
715 }
716
717 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
718}
719
720static int
721coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
722{
723 const char *s = MgPV_nolen_const (mg);
724
725 if (*s == '_')
726 {
727 SV **svp = 0;
728
729 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
730 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
731
732 if (svp)
733 {
734 SV *old = *svp;
735 *svp = newSVsv (sv);
736 SvREFCNT_dec (old);
737 return 0;
738 }
739 }
740
741 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
742}
743
537static void 744static void
538setup_coro (struct coro *coro) 745coro_setup (pTHX_ struct coro *coro)
539{ 746{
540 /* 747 /*
541 * emulate part of the perl startup here. 748 * emulate part of the perl startup here.
542 */ 749 */
543 dTHX; 750 coro_init_stacks (aTHX);
751
752 PL_runops = RUNOPS_DEFAULT;
753 PL_curcop = &PL_compiling;
754 PL_in_eval = EVAL_NULL;
755 PL_comppad = 0;
756 PL_curpm = 0;
757 PL_curpad = 0;
758 PL_localizing = 0;
759 PL_dirty = 0;
760 PL_restartop = 0;
761#if PERL_VERSION_ATLEAST (5,10,0)
762 PL_parser = 0;
763#endif
764
765 /* recreate the die/warn hooks */
766 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
767 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
768
769 GvSV (PL_defgv) = newSV (0);
770 GvAV (PL_defgv) = coro->args; coro->args = 0;
771 GvSV (PL_errgv) = newSV (0);
772 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
773 PL_rs = newSVsv (GvSV (irsgv));
774 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
775
776 {
777 dSP;
778 LOGOP myop;
779
780 Zero (&myop, 1, LOGOP);
781 myop.op_next = Nullop;
782 myop.op_flags = OPf_WANT_VOID;
783
784 PUSHMARK (SP);
785 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
786 PUTBACK;
787 PL_op = (OP *)&myop;
788 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
789 SPAGAIN;
790 }
791
792 /* this newly created coroutine might be run on an existing cctx which most
793 * likely was suspended in set_stacklevel, called from entersub.
794 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
795 * so we ENTER here for symmetry
796 */
797 ENTER;
798}
799
800static void
801coro_destroy (pTHX_ struct coro *coro)
802{
803 if (!IN_DESTRUCT)
804 {
805 /* restore all saved variables and stuff */
806 LEAVE_SCOPE (0);
807 assert (PL_tmps_floor == -1);
808
809 /* free all temporaries */
810 FREETMPS;
811 assert (PL_tmps_ix == -1);
812
813 /* unwind all extra stacks */
814 POPSTACK_TO (PL_mainstack);
815
816 /* unwind main stack */
817 dounwind (-1);
818 }
819
820 SvREFCNT_dec (GvSV (PL_defgv));
821 SvREFCNT_dec (GvAV (PL_defgv));
822 SvREFCNT_dec (GvSV (PL_errgv));
823 SvREFCNT_dec (PL_defoutgv);
824 SvREFCNT_dec (PL_rs);
825 SvREFCNT_dec (GvSV (irsgv));
826
827 SvREFCNT_dec (PL_diehook);
828 SvREFCNT_dec (PL_warnhook);
829
830 SvREFCNT_dec (coro->saved_deffh);
831 SvREFCNT_dec (coro->throw);
832
833 coro_destroy_stacks (aTHX);
834}
835
836static void
837free_coro_mortal (pTHX)
838{
839 if (expect_true (coro_mortal))
840 {
841 SvREFCNT_dec (coro_mortal);
842 coro_mortal = 0;
843 }
844}
845
846static int
847runops_trace (pTHX)
848{
849 COP *oldcop = 0;
850 int oldcxix = -2;
851 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
852 coro_cctx *cctx = coro->cctx;
853
854 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
855 {
856 PERL_ASYNC_CHECK ();
857
858 if (cctx->flags & CC_TRACE_ALL)
859 {
860 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
861 {
862 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
863 SV **bot, **top;
864 AV *av = newAV (); /* return values */
865 SV **cb;
866 dSP;
867
868 GV *gv = CvGV (cx->blk_sub.cv);
869 SV *fullname = sv_2mortal (newSV (0));
870 if (isGV (gv))
871 gv_efullname3 (fullname, gv, 0);
872
873 bot = PL_stack_base + cx->blk_oldsp + 1;
874 top = cx->blk_gimme == G_ARRAY ? SP + 1
875 : cx->blk_gimme == G_SCALAR ? bot + 1
876 : bot;
877
878 av_extend (av, top - bot);
879 while (bot < top)
880 av_push (av, SvREFCNT_inc (*bot++));
881
882 PL_runops = RUNOPS_DEFAULT;
883 ENTER;
884 SAVETMPS;
885 EXTEND (SP, 3);
886 PUSHMARK (SP);
887 PUSHs (&PL_sv_no);
888 PUSHs (fullname);
889 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
890 PUTBACK;
891 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
892 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
893 SPAGAIN;
894 FREETMPS;
895 LEAVE;
896 PL_runops = runops_trace;
897 }
898
899 if (oldcop != PL_curcop)
900 {
901 oldcop = PL_curcop;
902
903 if (PL_curcop != &PL_compiling)
904 {
905 SV **cb;
906
907 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
908 {
909 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
910
911 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
912 {
913 runops_proc_t old_runops = PL_runops;
914 dSP;
915 GV *gv = CvGV (cx->blk_sub.cv);
916 SV *fullname = sv_2mortal (newSV (0));
917
918 if (isGV (gv))
919 gv_efullname3 (fullname, gv, 0);
920
921 PL_runops = RUNOPS_DEFAULT;
922 ENTER;
923 SAVETMPS;
924 EXTEND (SP, 3);
925 PUSHMARK (SP);
926 PUSHs (&PL_sv_yes);
927 PUSHs (fullname);
928 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
929 PUTBACK;
930 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
931 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
932 SPAGAIN;
933 FREETMPS;
934 LEAVE;
935 PL_runops = runops_trace;
936 }
937
938 oldcxix = cxstack_ix;
939 }
940
941 if (cctx->flags & CC_TRACE_LINE)
942 {
943 dSP;
944
945 PL_runops = RUNOPS_DEFAULT;
946 ENTER;
947 SAVETMPS;
948 EXTEND (SP, 3);
949 PL_runops = RUNOPS_DEFAULT;
950 PUSHMARK (SP);
951 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
952 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
953 PUTBACK;
954 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
955 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
956 SPAGAIN;
957 FREETMPS;
958 LEAVE;
959 PL_runops = runops_trace;
960 }
961 }
962 }
963 }
964 }
965
966 TAINT_NOT;
967 return 0;
968}
969
970/* inject a fake call to Coro::State::_cctx_init into the execution */
971/* _cctx_init should be careful, as it could be called at almost any time */
972/* during execution of a perl program */
973static void NOINLINE
974cctx_prepare (pTHX_ coro_cctx *cctx)
975{
544 dSP; 976 dSP;
545 UNOP myop; 977 LOGOP myop;
546 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
547 978
548 coro_init_stacks (aTHX); 979 PL_top_env = &PL_start_env;
549 /*PL_curcop = 0;*/
550 /*PL_in_eval = PL_in_eval;*/ /* inherit */
551 SvREFCNT_dec (GvAV (PL_defgv));
552 GvAV (PL_defgv) = coro->args; coro->args = 0;
553 980
554 SPAGAIN; 981 if (cctx->flags & CC_TRACE)
982 PL_runops = runops_trace;
555 983
556 Zero (&myop, 1, UNOP); 984 Zero (&myop, 1, LOGOP);
557 myop.op_next = Nullop; 985 myop.op_next = PL_op;
558 myop.op_flags = OPf_WANT_VOID; 986 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
559 987
988 PUSHMARK (SP);
989 EXTEND (SP, 2);
990 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
991 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
992 PUTBACK;
560 PL_op = (OP *)&myop; 993 PL_op = (OP *)&myop;
561
562 PUSHMARK(SP);
563 XPUSHs (sub_init);
564 PUTBACK;
565 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 994 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566 SPAGAIN; 995 SPAGAIN;
567
568 ENTER; /* necessary e.g. for dounwind */
569} 996}
570 997
998/*
999 * this is a _very_ stripped down perl interpreter ;)
1000 */
571static void 1001static void
572free_coro_mortal () 1002cctx_run (void *arg)
573{ 1003{
574 if (coro_mortal) 1004 dTHX;
575 { 1005
576 SvREFCNT_dec (coro_mortal); 1006 /* cctx_run is the alternative tail of transfer(), so unlock here. */
577 coro_mortal = 0; 1007 UNLOCK;
1008
1009 /* we now skip the entersub that lead to transfer() */
1010 PL_op = PL_op->op_next;
1011
1012 /* inject a fake subroutine call to cctx_init */
1013 cctx_prepare (aTHX_ (coro_cctx *)arg);
1014
1015 /* somebody or something will hit me for both perl_run and PL_restartop */
1016 PL_restartop = PL_op;
1017 perl_run (PL_curinterp);
1018
1019 /*
1020 * If perl-run returns we assume exit() was being called or the coro
1021 * fell off the end, which seems to be the only valid (non-bug)
1022 * reason for perl_run to return. We try to exit by jumping to the
1023 * bootstrap-time "top" top_env, as we cannot restore the "main"
1024 * coroutine as Coro has no such concept
1025 */
1026 PL_top_env = main_top_env;
1027 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1028}
1029
1030static coro_cctx *
1031cctx_new ()
1032{
1033 coro_cctx *cctx;
1034 void *stack_start;
1035 size_t stack_size;
1036
1037 ++cctx_count;
1038
1039 Newz (0, cctx, 1, coro_cctx);
1040
1041#if HAVE_MMAP
1042 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1043 /* mmap supposedly does allocate-on-write for us */
1044 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1045
1046 if (cctx->sptr != (void *)-1)
578 } 1047 {
1048# if CORO_STACKGUARD
1049 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1050# endif
1051 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1052 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1053 cctx->flags |= CC_MAPPED;
1054 }
1055 else
1056#endif
1057 {
1058 cctx->ssize = coro_stacksize * (long)sizeof (long);
1059 New (0, cctx->sptr, coro_stacksize, long);
1060
1061 if (!cctx->sptr)
1062 {
1063 perror ("FATAL: unable to allocate stack for coroutine");
1064 _exit (EXIT_FAILURE);
1065 }
1066
1067 stack_start = cctx->sptr;
1068 stack_size = cctx->ssize;
1069 }
1070
1071 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1072 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1073
1074 return cctx;
579} 1075}
580 1076
581static void 1077static void
582coro_run (void *arg) 1078cctx_destroy (coro_cctx *cctx)
583{ 1079{
584 /* 1080 if (!cctx)
585 * this is a _very_ stripped down perl interpreter ;) 1081 return;
586 */
587 dTHX;
588 int ret;
589 1082
590 UNLOCK; 1083 --cctx_count;
591 1084
592 PL_top_env = &PL_start_env; 1085#if CORO_USE_VALGRIND
593 1086 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
594 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1087#endif
595 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
596
597 /* continue at cctx_init, without entersub */
598 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
599
600 /* somebody will hit me for both perl_run and PL_restartop */
601 ret = perl_run (aTHX_ PERL_GET_CONTEXT);
602 printf ("ret %d\n", ret);//D
603
604 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
605 abort ();
606}
607
608static coro_stack *
609stack_new ()
610{
611 coro_stack *stack;
612
613 New (0, stack, 1, coro_stack);
614 1088
615#if HAVE_MMAP 1089#if HAVE_MMAP
616 1090 if (cctx->flags & CC_MAPPED)
617 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1091 munmap (cctx->sptr, cctx->ssize);
618 /* mmap suppsedly does allocate-on-write for us */ 1092 else
619 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
620
621 if (stack->sptr == (void *)-1)
622 {
623 perror ("FATAL: unable to mmap stack for coroutine");
624 _exit (EXIT_FAILURE);
625 }
626
627# if STACKGUARD
628 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
629# endif 1093#endif
1094 Safefree (cctx->sptr);
630 1095
631#else 1096 Safefree (cctx);
1097}
632 1098
633 stack->ssize = STACKSIZE * (long)sizeof (long); 1099/* wether this cctx should be destructed */
634 New (0, stack->sptr, STACKSIZE, long); 1100#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
635 1101
636 if (!stack->sptr) 1102static coro_cctx *
637 { 1103cctx_get (pTHX)
638 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1104{
639 _exit (EXIT_FAILURE); 1105 while (expect_true (cctx_first))
640 } 1106 {
1107 coro_cctx *cctx = cctx_first;
1108 cctx_first = cctx->next;
1109 --cctx_idle;
641 1110
642#endif 1111 if (expect_true (!CCTX_EXPIRED (cctx)))
1112 return cctx;
643 1113
644 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1114 cctx_destroy (cctx);
1115 }
645 1116
646 return stack; 1117 return cctx_new ();
647} 1118}
648 1119
649static void 1120static void
650stack_free (coro_stack *stack) 1121cctx_put (coro_cctx *cctx)
651{ 1122{
652 if (!stack || stack == main_stack) 1123 /* free another cctx if overlimit */
653 return; 1124 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
654
655#if HAVE_MMAP
656 munmap (stack->sptr, stack->ssize);
657#else
658 Safefree (stack->sptr);
659#endif
660
661 Safefree (stack);
662}
663
664static coro_stack *stack_first;
665
666static coro_stack *
667stack_get ()
668{
669 coro_stack *stack;
670
671 if (stack_first)
672 {
673 stack = stack_first;
674 stack_first = stack->next;
675 }
676 else
677 { 1125 {
678 stack = stack_new (); 1126 coro_cctx *first = cctx_first;
679 PL_op = PL_op->op_next; 1127 cctx_first = first->next;
1128 --cctx_idle;
1129
1130 cctx_destroy (first);
680 } 1131 }
681 1132
682 return stack; 1133 ++cctx_idle;
1134 cctx->next = cctx_first;
1135 cctx_first = cctx;
683} 1136}
1137
1138/** coroutine switching *****************************************************/
684 1139
685static void 1140static void
686stack_put (coro_stack *stack) 1141transfer_check (pTHX_ struct coro *prev, struct coro *next)
687{ 1142{
688 stack->next = stack_first; 1143 if (expect_true (prev != next))
689 stack_first = stack; 1144 {
690} 1145 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1146 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
691 1147
692/* never call directly, always through the coro_state_transfer global variable */ 1148 if (expect_false (next->flags & CF_RUNNING))
693static void 1149 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1150
1151 if (expect_false (next->flags & CF_DESTROYED))
1152 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1153
1154#if !PERL_VERSION_ATLEAST (5,10,0)
1155 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1156 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1157#endif
1158 }
1159}
1160
1161/* always use the TRANSFER macro */
1162static void NOINLINE
694transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1163transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
695{ 1164{
696 dSTACKLEVEL; 1165 dSTACKLEVEL;
1166 static volatile int has_throw;
697 1167
698 /* sometimes transfer is only called to set idle_sp */ 1168 /* sometimes transfer is only called to set idle_sp */
699 if (flags == TRANSFER_SET_STACKLEVEL) 1169 if (expect_false (!next))
1170 {
700 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1171 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
701 else if (prev != next) 1172 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
702 { 1173 }
1174 else if (expect_true (prev != next))
1175 {
703 coro_stack *prev__stack; 1176 coro_cctx *prev__cctx;
1177
1178 if (expect_false (prev->flags & CF_NEW))
1179 {
1180 /* create a new empty context */
1181 Newz (0, prev->cctx, 1, coro_cctx);
1182 prev->flags &= ~CF_NEW;
1183 prev->flags |= CF_RUNNING;
1184 }
1185
1186 prev->flags &= ~CF_RUNNING;
1187 next->flags |= CF_RUNNING;
704 1188
705 LOCK; 1189 LOCK;
706 1190
707 if (next->mainstack) 1191 /* first get rid of the old state */
1192 save_perl (aTHX_ prev);
1193
1194 if (expect_false (next->flags & CF_NEW))
708 { 1195 {
709 /* coroutine already started */ 1196 /* need to start coroutine */
710 SAVE (prev, flags); 1197 next->flags &= ~CF_NEW;
711 LOAD (next); 1198 /* setup coroutine call */
1199 coro_setup (aTHX_ next);
712 } 1200 }
713 else 1201 else
1202 load_perl (aTHX_ next);
1203
1204 prev__cctx = prev->cctx;
1205
1206 /* possibly "free" the cctx */
1207 if (expect_true (
1208 prev__cctx->idle_sp == STACKLEVEL
1209 && !(prev__cctx->flags & CC_TRACE)
1210 && !force_cctx
1211 ))
714 { 1212 {
715 /* need to start coroutine */ 1213 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
716 /* first get rid of the old state */ 1214 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
717 SAVE (prev, -1); 1215
718 /* setup coroutine call */ 1216 prev->cctx = 0;
719 setup_coro (next); 1217
720 /* need a stack */ 1218 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
721 next->stack = 0; 1219 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1220 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1221 if (!next->cctx)
1222 next->cctx = cctx_get (aTHX);
1223
1224 cctx_put (prev__cctx);
722 } 1225 }
723 1226
724 prev__stack = prev->stack; 1227 ++next->usecount;
725 1228
726 /* possibly "free" the stack */ 1229 if (expect_true (!next->cctx))
727 if (prev__stack->idle_sp == STACKLEVEL) 1230 next->cctx = cctx_get (aTHX);
1231
1232 has_throw = !!next->throw;
1233
1234 if (expect_false (prev__cctx != next->cctx))
728 { 1235 {
729 stack_put (prev__stack); 1236 prev__cctx->top_env = PL_top_env;
730 prev->stack = 0; 1237 PL_top_env = next->cctx->top_env;
1238 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
731 } 1239 }
732 1240
733 if (!next->stack) 1241 free_coro_mortal (aTHX);
734 next->stack = stack_get (); 1242 UNLOCK;
735 1243
736 if (prev__stack != next->stack) 1244 if (expect_false (has_throw))
737 { 1245 {
738 prev__stack->top_env = PL_top_env; 1246 struct coro *coro = SvSTATE (coro_current);
739 PL_top_env = next->stack->top_env; 1247
740 printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D 1248 if (coro->throw)
741 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1249 {
1250 SV *exception = coro->throw;
1251 coro->throw = 0;
1252 sv_setsv (ERRSV, exception);
1253 croak (0);
1254 }
742 } 1255 }
1256 }
1257}
743 1258
744 free_coro_mortal (); 1259struct transfer_args
1260{
1261 struct coro *prev, *next;
1262};
745 1263
1264#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1265#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1266
1267/** high level stuff ********************************************************/
1268
1269static int
1270coro_state_destroy (pTHX_ struct coro *coro)
1271{
1272 if (coro->flags & CF_DESTROYED)
1273 return 0;
1274
1275 coro->flags |= CF_DESTROYED;
1276
1277 if (coro->flags & CF_READY)
1278 {
1279 /* reduce nready, as destroying a ready coro effectively unreadies it */
1280 /* alternative: look through all ready queues and remove the coro */
1281 LOCK;
1282 --coro_nready;
746 UNLOCK; 1283 UNLOCK;
747 } 1284 }
748} 1285 else
749 1286 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
750/* use this function pointer to call the above function */
751/* this is done to increase chances of the compiler not inlining the call */
752/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755struct transfer_args
756{
757 struct coro *prev, *next;
758 int flags;
759};
760
761#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
762
763static void
764coro_state_destroy (struct coro *coro)
765{
766 if (coro->refcnt--)
767 return;
768 1287
769 if (coro->mainstack && coro->mainstack != main_mainstack) 1288 if (coro->mainstack && coro->mainstack != main_mainstack)
770 { 1289 {
771 struct coro temp; 1290 struct coro temp;
772 1291
773 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1292 if (coro->flags & CF_RUNNING)
1293 croak ("FATAL: tried to destroy currently running coroutine");
1294
1295 save_perl (aTHX_ &temp);
774 LOAD (aTHX_ coro); 1296 load_perl (aTHX_ coro);
775 1297
776 destroy_stacks (aTHX); 1298 coro_destroy (aTHX_ coro);
777 1299
778 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1300 load_perl (aTHX_ &temp);
779 1301
780 coro->mainstack = 0; 1302 coro->slot = 0;
781 } 1303 }
782 1304
783 stack_free (coro->stack); 1305 cctx_destroy (coro->cctx);
784 SvREFCNT_dec (coro->args); 1306 SvREFCNT_dec (coro->args);
785 Safefree (coro); 1307
1308 if (coro->next) coro->next->prev = coro->prev;
1309 if (coro->prev) coro->prev->next = coro->next;
1310 if (coro == coro_first) coro_first = coro->next;
1311
1312 return 1;
786} 1313}
787 1314
788static int 1315static int
789coro_state_clear (SV *sv, MAGIC *mg) 1316coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790{ 1317{
791 struct coro *coro = (struct coro *)mg->mg_ptr; 1318 struct coro *coro = (struct coro *)mg->mg_ptr;
792 mg->mg_ptr = 0; 1319 mg->mg_ptr = 0;
793 1320
1321 coro->hv = 0;
1322
1323 if (--coro->refcnt < 0)
1324 {
794 coro_state_destroy (coro); 1325 coro_state_destroy (aTHX_ coro);
1326 Safefree (coro);
1327 }
795 1328
796 return 0; 1329 return 0;
797} 1330}
798 1331
799static int 1332static int
800coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1333coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801{ 1334{
802 struct coro *coro = (struct coro *)mg->mg_ptr; 1335 struct coro *coro = (struct coro *)mg->mg_ptr;
803 1336
804 ++coro->refcnt; 1337 ++coro->refcnt;
805 1338
806 return 0; 1339 return 0;
807} 1340}
808 1341
809static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1342static MGVTBL coro_state_vtbl = {
810 1343 0, 0, 0, 0,
811static struct coro * 1344 coro_state_free,
812SvSTATE (SV *coro) 1345 0,
813{ 1346#ifdef MGf_DUP
814 HV *stash; 1347 coro_state_dup,
815 MAGIC *mg; 1348#else
816 1349# define MGf_DUP 0
817 if (SvROK (coro)) 1350#endif
818 coro = SvRV (coro); 1351};
819
820 stash = SvSTASH (coro);
821 if (stash != coro_stash && stash != coro_state_stash)
822 {
823 /* very slow, but rare, check */
824 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825 croak ("Coro::State object required");
826 }
827
828 mg = SvMAGIC (coro);
829 assert (mg->mg_type == PERL_MAGIC_ext);
830 return (struct coro *)mg->mg_ptr;
831}
832 1352
833static void 1353static void
834prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags) 1354prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835{ 1355{
836 ta->prev = SvSTATE (prev); 1356 ta->prev = SvSTATE (prev_sv);
837 ta->next = SvSTATE (next); 1357 ta->next = SvSTATE (next_sv);
838 ta->flags = flags; 1358 TRANSFER_CHECK (*ta);
839} 1359}
840 1360
841static void 1361static void
842api_transfer (SV *prev, SV *next, int flags) 1362api_transfer (SV *prev_sv, SV *next_sv)
843{ 1363{
844 dTHX; 1364 dTHX;
845 struct transfer_args ta; 1365 struct transfer_args ta;
846 1366
847 prepare_transfer (aTHX_ &ta, prev, next, flags); 1367 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848 TRANSFER (ta); 1368 TRANSFER (ta, 1);
849} 1369}
850 1370
851/** Coro ********************************************************************/ 1371/** Coro ********************************************************************/
852 1372
853#define PRIO_MAX 3
854#define PRIO_HIGH 1
855#define PRIO_NORMAL 0
856#define PRIO_LOW -1
857#define PRIO_IDLE -3
858#define PRIO_MIN -4
859
860/* for Coro.pm */
861static GV *coro_current, *coro_idle;
862static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863static int coro_nready;
864
865static void 1373static void
866coro_enq (pTHX_ SV *sv) 1374coro_enq (pTHX_ SV *coro_sv)
1375{
1376 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1377}
1378
1379static SV *
1380coro_deq (pTHX)
867{ 1381{
868 int prio; 1382 int prio;
869 1383
870 if (SvTYPE (sv) != SVt_PVHV)
871 croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873 prio = SvSTATE (sv)->prio;
874
875 av_push (coro_ready [prio - PRIO_MIN], sv);
876 coro_nready++;
877}
878
879static SV *
880coro_deq (pTHX_ int min_prio)
881{
882 int prio = PRIO_MAX - PRIO_MIN;
883
884 min_prio -= PRIO_MIN;
885 if (min_prio < 0)
886 min_prio = 0;
887
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1384 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
889 if (AvFILLp (coro_ready [prio]) >= 0) 1385 if (AvFILLp (coro_ready [prio]) >= 0)
890 {
891 coro_nready--;
892 return av_shift (coro_ready [prio]); 1386 return av_shift (coro_ready [prio]);
893 }
894 1387
895 return 0; 1388 return 0;
896} 1389}
897 1390
1391static int
1392api_ready (SV *coro_sv)
1393{
1394 dTHX;
1395 struct coro *coro;
1396 SV *sv_hook;
1397 void (*xs_hook)(void);
1398
1399 if (SvROK (coro_sv))
1400 coro_sv = SvRV (coro_sv);
1401
1402 coro = SvSTATE (coro_sv);
1403
1404 if (coro->flags & CF_READY)
1405 return 0;
1406
1407 coro->flags |= CF_READY;
1408
1409 LOCK;
1410
1411 sv_hook = coro_nready ? 0 : coro_readyhook;
1412 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1413
1414 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1415 ++coro_nready;
1416
1417 UNLOCK;
1418
1419 if (sv_hook)
1420 {
1421 dSP;
1422
1423 ENTER;
1424 SAVETMPS;
1425
1426 PUSHMARK (SP);
1427 PUTBACK;
1428 call_sv (sv_hook, G_DISCARD);
1429 SPAGAIN;
1430
1431 FREETMPS;
1432 LEAVE;
1433 }
1434
1435 if (xs_hook)
1436 xs_hook ();
1437
1438 return 1;
1439}
1440
1441static int
1442api_is_ready (SV *coro_sv)
1443{
1444 dTHX;
1445 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1446}
1447
898static void 1448static void
899api_ready (SV *coro) 1449prepare_schedule (pTHX_ struct transfer_args *ta)
900{ 1450{
901 dTHX; 1451 SV *prev_sv, *next_sv;
902 1452
903 if (SvROK (coro)) 1453 for (;;)
904 coro = SvRV (coro); 1454 {
1455 LOCK;
1456 next_sv = coro_deq (aTHX);
1457
1458 /* nothing to schedule: call the idle handler */
1459 if (expect_false (!next_sv))
1460 {
1461 dSP;
1462 UNLOCK;
1463
1464 ENTER;
1465 SAVETMPS;
1466
1467 PUSHMARK (SP);
1468 PUTBACK;
1469 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1470 SPAGAIN;
1471
1472 FREETMPS;
1473 LEAVE;
1474 continue;
1475 }
1476
1477 ta->next = SvSTATE (next_sv);
1478
1479 /* cannot transfer to destroyed coros, skip and look for next */
1480 if (expect_false (ta->next->flags & CF_DESTROYED))
1481 {
1482 UNLOCK;
1483 SvREFCNT_dec (next_sv);
1484 /* coro_nready is already taken care of by destroy */
1485 continue;
1486 }
1487
1488 --coro_nready;
1489 UNLOCK;
1490 break;
1491 }
1492
1493 /* free this only after the transfer */
1494 prev_sv = SvRV (coro_current);
1495 ta->prev = SvSTATE (prev_sv);
1496 TRANSFER_CHECK (*ta);
1497 assert (ta->next->flags & CF_READY);
1498 ta->next->flags &= ~CF_READY;
1499 SvRV_set (coro_current, next_sv);
905 1500
906 LOCK; 1501 LOCK;
907 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1502 free_coro_mortal (aTHX);
1503 coro_mortal = prev_sv;
908 UNLOCK; 1504 UNLOCK;
909} 1505}
910 1506
911static void 1507static void
912prepare_schedule (aTHX_ struct transfer_args *ta)
913{
914 SV *current, *prev, *next;
915
916 LOCK;
917
918 current = GvSV (coro_current);
919
920 for (;;)
921 {
922 LOCK;
923
924 next = coro_deq (aTHX_ PRIO_MIN);
925
926 if (next)
927 break;
928
929 UNLOCK;
930
931 {
932 dSP;
933
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 }
944 }
945
946 prev = SvRV (current);
947 SvRV (current) = next;
948
949 /* free this only after the transfer */
950 free_coro_mortal ();
951 coro_mortal = prev;
952
953 ta->prev = SvSTATE (prev);
954 ta->next = SvSTATE (next);
955 ta->flags = TRANSFER_SAVE_ALL;
956
957 UNLOCK;
958}
959
960static void
961prepare_cede (aTHX_ struct transfer_args *ta) 1508prepare_cede (pTHX_ struct transfer_args *ta)
962{ 1509{
963 LOCK; 1510 api_ready (coro_current);
964 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966
967 prepare_schedule (ta); 1511 prepare_schedule (aTHX_ ta);
1512}
1513
1514static int
1515prepare_cede_notself (pTHX_ struct transfer_args *ta)
1516{
1517 if (coro_nready)
1518 {
1519 SV *prev = SvRV (coro_current);
1520 prepare_schedule (aTHX_ ta);
1521 api_ready (prev);
1522 return 1;
1523 }
1524 else
1525 return 0;
968} 1526}
969 1527
970static void 1528static void
971api_schedule (void) 1529api_schedule (void)
972{ 1530{
973 dTHX; 1531 dTHX;
974 struct transfer_args ta; 1532 struct transfer_args ta;
975 1533
976 prepare_schedule (&ta); 1534 prepare_schedule (aTHX_ &ta);
977 TRANSFER (ta); 1535 TRANSFER (ta, 1);
978} 1536}
979 1537
980static void 1538static int
981api_cede (void) 1539api_cede (void)
982{ 1540{
983 dTHX; 1541 dTHX;
984 struct transfer_args ta; 1542 struct transfer_args ta;
985 1543
986 prepare_cede (&ta); 1544 prepare_cede (aTHX_ &ta);
1545
1546 if (expect_true (ta.prev != ta.next))
1547 {
987 TRANSFER (ta); 1548 TRANSFER (ta, 1);
1549 return 1;
1550 }
1551 else
1552 return 0;
988} 1553}
989 1554
1555static int
1556api_cede_notself (void)
1557{
1558 dTHX;
1559 struct transfer_args ta;
1560
1561 if (prepare_cede_notself (aTHX_ &ta))
1562 {
1563 TRANSFER (ta, 1);
1564 return 1;
1565 }
1566 else
1567 return 0;
1568}
1569
1570static void
1571api_trace (SV *coro_sv, int flags)
1572{
1573 dTHX;
1574 struct coro *coro = SvSTATE (coro_sv);
1575
1576 if (flags & CC_TRACE)
1577 {
1578 if (!coro->cctx)
1579 coro->cctx = cctx_new ();
1580 else if (!(coro->cctx->flags & CC_TRACE))
1581 croak ("cannot enable tracing on coroutine with custom stack");
1582
1583 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1584 }
1585 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1586 {
1587 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1588
1589 if (coro->flags & CF_RUNNING)
1590 PL_runops = RUNOPS_DEFAULT;
1591 else
1592 coro->slot->runops = RUNOPS_DEFAULT;
1593 }
1594}
1595
990MODULE = Coro::State PACKAGE = Coro::State 1596MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 1597
992PROTOTYPES: DISABLE 1598PROTOTYPES: DISABLE
993 1599
994BOOT: 1600BOOT:
995{ 1601{
996#ifdef USE_ITHREADS 1602#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 1603 MUTEX_INIT (&coro_mutex);
998#endif 1604#endif
999 BOOT_PAGESIZE; 1605 BOOT_PAGESIZE;
1000 1606
1607 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1608 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1609
1610 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1611 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1612 orig_sigelem_set = PL_vtbl_sigelem.svt_set;
1613 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1614
1615 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1616 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1617 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1618
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1619 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 1620
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1621 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1622 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1623 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1624 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006 1625
1007 main_mainstack = PL_mainstack; 1626 main_mainstack = PL_mainstack;
1627 main_top_env = PL_top_env;
1008 1628
1629 while (main_top_env->je_prev)
1630 main_top_env = main_top_env->je_prev;
1631
1009 coroapi.ver = CORO_API_VERSION; 1632 coroapi.ver = CORO_API_VERSION;
1633 coroapi.rev = CORO_API_REVISION;
1010 coroapi.transfer = api_transfer; 1634 coroapi.transfer = api_transfer;
1011
1012 Newz (0, main_stack, 1, coro_stack);
1013 main_stack->idle_sp = (void *)-1;
1014 1635
1015 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1636 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1016} 1637}
1017 1638
1018SV * 1639SV *
1019new (char *klass, ...) 1640new (char *klass, ...)
1020 CODE: 1641 CODE:
1021{ 1642{
1022 struct coro *coro; 1643 struct coro *coro;
1644 MAGIC *mg;
1023 HV *hv; 1645 HV *hv;
1024 int i; 1646 int i;
1025 1647
1026 Newz (0, coro, 1, struct coro); 1648 Newz (0, coro, 1, struct coro);
1027 coro->args = newAV (); 1649 coro->args = newAV ();
1650 coro->flags = CF_NEW;
1028 1651
1652 if (coro_first) coro_first->prev = coro;
1653 coro->next = coro_first;
1654 coro_first = coro;
1655
1029 hv = newHV (); 1656 coro->hv = hv = newHV ();
1030 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1657 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1658 mg->mg_flags |= MGf_DUP;
1031 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1659 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1032 1660
1661 av_extend (coro->args, items - 1);
1033 for (i = 1; i < items; i++) 1662 for (i = 1; i < items; i++)
1034 av_push (coro->args, newSVsv (ST (i))); 1663 av_push (coro->args, newSVsv (ST (i)));
1035
1036 coro->stack = main_stack;
1037 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1038 /*coro->stack = 0;*/
1039} 1664}
1040 OUTPUT: 1665 OUTPUT:
1041 RETVAL 1666 RETVAL
1042 1667
1668# these not obviously related functions are all rolled into the same xs
1669# function to increase chances that they all will call transfer with the same
1670# stack offset
1043void 1671void
1044_set_stacklevel (...) 1672_set_stacklevel (...)
1045 ALIAS: 1673 ALIAS:
1046 Coro::State::transfer = 1 1674 Coro::State::transfer = 1
1047 Coro::schedule = 2 1675 Coro::schedule = 2
1048 Coro::cede = 3 1676 Coro::cede = 3
1049 Coro::Cont::yield = 4 1677 Coro::cede_notself = 4
1050 CODE: 1678 CODE:
1051{ 1679{
1052 struct transfer_args ta; 1680 struct transfer_args ta;
1053 1681
1682 PUTBACK;
1054 switch (ix) 1683 switch (ix)
1055 { 1684 {
1056 case 0: 1685 case 0:
1057 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1686 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1058 ta.next = 0; 1687 ta.next = 0;
1059 ta.flags = TRANSFER_SET_STACKLEVEL;
1060 break; 1688 break;
1061 1689
1062 case 1: 1690 case 1:
1063 if (items != 3) 1691 if (items != 2)
1064 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1692 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1065 1693
1066 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1694 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1067 break; 1695 break;
1068 1696
1069 case 2: 1697 case 2:
1070 prepare_schedule (&ta); 1698 prepare_schedule (aTHX_ &ta);
1071 break; 1699 break;
1072 1700
1073 case 3: 1701 case 3:
1074 prepare_cede (&ta); 1702 prepare_cede (aTHX_ &ta);
1075 break; 1703 break;
1076 1704
1077 case 4: 1705 case 4:
1078 { 1706 if (!prepare_cede_notself (aTHX_ &ta))
1079 SV *yieldstack; 1707 XSRETURN_EMPTY;
1080 SV *sv;
1081 AV *defav = GvAV (PL_defgv);
1082 1708
1083 yieldstack = *hv_fetch (
1084 (HV *)SvRV (GvSV (coro_current)),
1085 "yieldstack", sizeof ("yieldstack") - 1,
1086 0
1087 );
1088
1089 /* set up @_ -- ugly */
1090 av_clear (defav);
1091 av_fill (defav, items - 1);
1092 while (items--)
1093 av_store (defav, items, SvREFCNT_inc (ST(items)));
1094
1095 sv = av_pop ((AV *)SvRV (yieldstack));
1096 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1097 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1098 ta.flags = 0;
1099 SvREFCNT_dec (sv);
1100 }
1101 break; 1709 break;
1102
1103 } 1710 }
1711 SPAGAIN;
1104 1712
1713 BARRIER;
1714 PUTBACK;
1105 TRANSFER (ta); 1715 TRANSFER (ta, 0);
1716 SPAGAIN; /* might be the sp of a different coroutine now */
1717 /* be extra careful not to ever do anything after TRANSFER */
1106} 1718}
1719
1720bool
1721_destroy (SV *coro_sv)
1722 CODE:
1723 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1724 OUTPUT:
1725 RETVAL
1107 1726
1108void 1727void
1109_clone_state_from (SV *dst, SV *src)
1110 CODE:
1111{
1112 struct coro *coro_src = SvSTATE (src);
1113
1114 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1115
1116 ++coro_src->refcnt;
1117 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1118}
1119
1120void
1121_nonlocal_goto (IV nextop)
1122 CODE:
1123 /* uuh, somebody will kill me again for this */
1124 PL_op->op_next = INT2PTR (OP *, nextop);
1125
1126void
1127_exit (code) 1728_exit (int code)
1128 int code
1129 PROTOTYPE: $ 1729 PROTOTYPE: $
1130 CODE: 1730 CODE:
1131 _exit (code); 1731 _exit (code);
1132 1732
1733int
1734cctx_stacksize (int new_stacksize = 0)
1735 CODE:
1736 RETVAL = coro_stacksize;
1737 if (new_stacksize)
1738 coro_stacksize = new_stacksize;
1739 OUTPUT:
1740 RETVAL
1741
1742int
1743cctx_count ()
1744 CODE:
1745 RETVAL = cctx_count;
1746 OUTPUT:
1747 RETVAL
1748
1749int
1750cctx_idle ()
1751 CODE:
1752 RETVAL = cctx_idle;
1753 OUTPUT:
1754 RETVAL
1755
1756void
1757list ()
1758 PPCODE:
1759{
1760 struct coro *coro;
1761 for (coro = coro_first; coro; coro = coro->next)
1762 if (coro->hv)
1763 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1764}
1765
1766void
1767call (Coro::State coro, SV *coderef)
1768 ALIAS:
1769 eval = 1
1770 CODE:
1771{
1772 if (coro->mainstack)
1773 {
1774 struct coro temp;
1775
1776 if (!(coro->flags & CF_RUNNING))
1777 {
1778 PUTBACK;
1779 save_perl (aTHX_ &temp);
1780 load_perl (aTHX_ coro);
1781 }
1782
1783 {
1784 dSP;
1785 ENTER;
1786 SAVETMPS;
1787 PUTBACK;
1788 PUSHSTACK;
1789 PUSHMARK (SP);
1790
1791 if (ix)
1792 eval_sv (coderef, 0);
1793 else
1794 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1795
1796 POPSTACK;
1797 SPAGAIN;
1798 FREETMPS;
1799 LEAVE;
1800 PUTBACK;
1801 }
1802
1803 if (!(coro->flags & CF_RUNNING))
1804 {
1805 save_perl (aTHX_ coro);
1806 load_perl (aTHX_ &temp);
1807 SPAGAIN;
1808 }
1809 }
1810}
1811
1812SV *
1813is_ready (Coro::State coro)
1814 PROTOTYPE: $
1815 ALIAS:
1816 is_ready = CF_READY
1817 is_running = CF_RUNNING
1818 is_new = CF_NEW
1819 is_destroyed = CF_DESTROYED
1820 CODE:
1821 RETVAL = boolSV (coro->flags & ix);
1822 OUTPUT:
1823 RETVAL
1824
1825void
1826api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1827
1828SV *
1829has_cctx (Coro::State coro)
1830 PROTOTYPE: $
1831 CODE:
1832 RETVAL = boolSV (!!coro->cctx);
1833 OUTPUT:
1834 RETVAL
1835
1836int
1837is_traced (Coro::State coro)
1838 PROTOTYPE: $
1839 CODE:
1840 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1841 OUTPUT:
1842 RETVAL
1843
1844IV
1845rss (Coro::State coro)
1846 PROTOTYPE: $
1847 ALIAS:
1848 usecount = 1
1849 CODE:
1850 switch (ix)
1851 {
1852 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1853 case 1: RETVAL = coro->usecount; break;
1854 }
1855 OUTPUT:
1856 RETVAL
1857
1858void
1859force_cctx ()
1860 CODE:
1861 struct coro *coro = SvSTATE (coro_current);
1862 coro->cctx->idle_sp = 0;
1863
1133MODULE = Coro::State PACKAGE = Coro 1864MODULE = Coro::State PACKAGE = Coro
1134 1865
1135BOOT: 1866BOOT:
1136{ 1867{
1137 int i; 1868 int i;
1138 1869
1870 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1871 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1872 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1873
1874 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1875 SvREADONLY_on (coro_current);
1876
1139 coro_stash = gv_stashpv ("Coro", TRUE); 1877 coro_stash = gv_stashpv ("Coro", TRUE);
1140 1878
1141 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1879 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1142 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1880 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1143 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1881 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1144 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1882 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1145 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1883 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1146 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1884 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1147 1885
1148 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1149 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1150
1151 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1886 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1152 coro_ready[i] = newAV (); 1887 coro_ready[i] = newAV ();
1153 1888
1154 { 1889 {
1155 SV *sv = perl_get_sv("Coro::API", 1); 1890 SV *sv = perl_get_sv ("Coro::API", TRUE);
1891 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1156 1892
1157 coroapi.schedule = api_schedule; 1893 coroapi.schedule = api_schedule;
1158 coroapi.cede = api_cede; 1894 coroapi.cede = api_cede;
1895 coroapi.cede_notself = api_cede_notself;
1159 coroapi.ready = api_ready; 1896 coroapi.ready = api_ready;
1897 coroapi.is_ready = api_is_ready;
1160 coroapi.nready = &coro_nready; 1898 coroapi.nready = &coro_nready;
1161 coroapi.current = coro_current; 1899 coroapi.current = coro_current;
1162 1900
1163 GCoroAPI = &coroapi; 1901 GCoroAPI = &coroapi;
1164 sv_setiv (sv, (IV)&coroapi); 1902 sv_setiv (sv, (IV)&coroapi);
1165 SvREADONLY_on (sv); 1903 SvREADONLY_on (sv);
1166 } 1904 }
1167} 1905}
1906
1907void
1908_set_current (SV *current)
1909 PROTOTYPE: $
1910 CODE:
1911 SvREFCNT_dec (SvRV (coro_current));
1912 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1913
1914void
1915_set_readyhook (SV *hook)
1916 PROTOTYPE: $
1917 CODE:
1918 LOCK;
1919 SvREFCNT_dec (coro_readyhook);
1920 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1921 UNLOCK;
1168 1922
1169int 1923int
1170prio (Coro::State coro, int newprio = 0) 1924prio (Coro::State coro, int newprio = 0)
1171 ALIAS: 1925 ALIAS:
1172 nice = 1 1926 nice = 1
… …
1175 RETVAL = coro->prio; 1929 RETVAL = coro->prio;
1176 1930
1177 if (items > 1) 1931 if (items > 1)
1178 { 1932 {
1179 if (ix) 1933 if (ix)
1180 newprio += coro->prio; 1934 newprio = coro->prio - newprio;
1181 1935
1182 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 1936 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1183 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 1937 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1184 1938
1185 coro->prio = newprio; 1939 coro->prio = newprio;
1186 } 1940 }
1187} 1941}
1942 OUTPUT:
1943 RETVAL
1188 1944
1189void 1945SV *
1190ready (SV *self) 1946ready (SV *self)
1191 PROTOTYPE: $ 1947 PROTOTYPE: $
1192 CODE: 1948 CODE:
1193 api_ready (self); 1949 RETVAL = boolSV (api_ready (self));
1950 OUTPUT:
1951 RETVAL
1194 1952
1195int 1953int
1196nready (...) 1954nready (...)
1197 PROTOTYPE: 1955 PROTOTYPE:
1198 CODE: 1956 CODE:
1199 RETVAL = coro_nready; 1957 RETVAL = coro_nready;
1200 OUTPUT: 1958 OUTPUT:
1201 RETVAL 1959 RETVAL
1202 1960
1961void
1962throw (Coro::State self, SV *throw = &PL_sv_undef)
1963 PROTOTYPE: $;$
1964 CODE:
1965 SvREFCNT_dec (self->throw);
1966 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1967
1968void
1969swap_defsv (Coro::State self)
1970 PROTOTYPE: $
1971 ALIAS:
1972 swap_defav = 1
1973 CODE:
1974 if (!self->slot)
1975 croak ("cannot swap state with coroutine that has no saved state");
1976 else
1977 {
1978 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1979 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1980
1981 SV *tmp = *src; *src = *dst; *dst = tmp;
1982 }
1983
1984# for async_pool speedup
1985void
1986_pool_1 (SV *cb)
1987 CODE:
1988{
1989 struct coro *coro = SvSTATE (coro_current);
1990 HV *hv = (HV *)SvRV (coro_current);
1991 AV *defav = GvAV (PL_defgv);
1992 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1993 AV *invoke_av;
1994 int i, len;
1995
1996 if (!invoke)
1997 {
1998 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1999 croak ("\3async_pool terminate\2\n");
2000 }
2001
2002 SvREFCNT_dec (coro->saved_deffh);
2003 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2004
2005 hv_store (hv, "desc", sizeof ("desc") - 1,
2006 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2007
2008 invoke_av = (AV *)SvRV (invoke);
2009 len = av_len (invoke_av);
2010
2011 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2012
2013 if (len > 0)
2014 {
2015 av_fill (defav, len - 1);
2016 for (i = 0; i < len; ++i)
2017 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2018 }
2019
2020 SvREFCNT_dec (invoke);
2021}
2022
2023void
2024_pool_2 (SV *cb)
2025 CODE:
2026{
2027 struct coro *coro = SvSTATE (coro_current);
2028
2029 sv_setsv (cb, &PL_sv_undef);
2030
2031 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2032 coro->saved_deffh = 0;
2033
2034 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2035 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2036 {
2037 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
2038 croak ("\3async_pool terminate\2\n");
2039 }
2040
2041 av_clear (GvAV (PL_defgv));
2042 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2043 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2044
2045 coro->prio = 0;
2046
2047 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2048 api_trace (coro_current, 0);
2049
2050 av_push (av_async_pool, newSVsv (coro_current));
2051}
2052
2053
1203MODULE = Coro::State PACKAGE = Coro::AIO 2054MODULE = Coro::State PACKAGE = Coro::AIO
1204 2055
1205SV * 2056SV *
1206_get_state () 2057_get_state ()
1207 CODE: 2058 CODE:
1208{ 2059{
1209 struct { 2060 struct io_state *data;
1210 int errorno;
1211 int laststype;
1212 int laststatval;
1213 Stat_t statcache;
1214 } data;
1215 2061
2062 RETVAL = newSV (sizeof (struct io_state));
2063 data = (struct io_state *)SvPVX (RETVAL);
2064 SvCUR_set (RETVAL, sizeof (struct io_state));
2065 SvPOK_only (RETVAL);
2066
1216 data.errorno = errno; 2067 data->errorno = errno;
1217 data.laststype = PL_laststype; 2068 data->laststype = PL_laststype;
1218 data.laststatval = PL_laststatval; 2069 data->laststatval = PL_laststatval;
1219 data.statcache = PL_statcache; 2070 data->statcache = PL_statcache;
1220
1221 RETVAL = newSVpvn ((char *)&data, sizeof data);
1222} 2071}
1223 OUTPUT: 2072 OUTPUT:
1224 RETVAL 2073 RETVAL
1225 2074
1226void 2075void
1227_set_state (char *data_) 2076_set_state (char *data_)
1228 PROTOTYPE: $ 2077 PROTOTYPE: $
1229 CODE: 2078 CODE:
1230{ 2079{
1231 struct { 2080 struct io_state *data = (void *)data_;
1232 int errorno;
1233 int laststype;
1234 int laststatval;
1235 Stat_t statcache;
1236 } *data = (void *)data_;
1237 2081
1238 errno = data->errorno; 2082 errno = data->errorno;
1239 PL_laststype = data->laststype; 2083 PL_laststype = data->laststype;
1240 PL_laststatval = data->laststatval; 2084 PL_laststatval = data->laststatval;
1241 PL_statcache = data->statcache; 2085 PL_statcache = data->statcache;
1242} 2086}
2087
2088
2089MODULE = Coro::State PACKAGE = Coro::AnyEvent
2090
2091BOOT:
2092 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2093
2094SV *
2095_schedule (...)
2096 PROTOTYPE: @
2097 CODE:
2098{
2099 static int incede;
2100
2101 api_cede_notself ();
2102
2103 ++incede;
2104 while (coro_nready >= incede && api_cede ())
2105 ;
2106
2107 sv_setsv (sv_activity, &PL_sv_undef);
2108 if (coro_nready >= incede)
2109 {
2110 PUSHMARK (SP);
2111 PUTBACK;
2112 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2113 SPAGAIN;
2114 }
2115
2116 --incede;
2117}
2118

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