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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 1.236 by root, Sat May 10 17:43:41 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
8 9
9#include "patchlevel.h" 10#include "patchlevel.h"
10 11
11#if PERL_VERSION < 6 12#include <stdio.h>
13#include <errno.h>
14#include <assert.h>
15
16#ifdef WIN32
17# undef setjmp
18# undef longjmp
19# undef _exit
20# define setjmp _setjmp // deep magic, don't ask
21#else
22# include <inttypes.h> /* most portable stdint.h */
23#endif
24
25#ifdef HAVE_MMAP
26# include <unistd.h>
27# include <sys/mman.h>
28# ifndef MAP_ANONYMOUS
29# ifdef MAP_ANON
30# define MAP_ANONYMOUS MAP_ANON
31# else
32# undef HAVE_MMAP
33# endif
34# endif
35# include <limits.h>
36# ifndef PAGESIZE
37# define PAGESIZE pagesize
38# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
39static long pagesize;
40# else
41# define BOOT_PAGESIZE (void)0
42# endif
43#else
44# define PAGESIZE 0
45# define BOOT_PAGESIZE (void)0
46#endif
47
48#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif
54
55/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8
57
58#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
63
64#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 65# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 66# define PL_ppaddr ppaddr
14# endif 67# endif
15# ifndef call_sv 68# ifndef call_sv
16# define call_sv perl_call_sv 69# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 80# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 81# define IS_PADCONST(v) 0
29# endif 82# endif
30#endif 83#endif
31 84
32#include <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
71#define labs(l) ((l) >= 0 ? (l) : -(l)) 123#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value))
127#else
128# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr)
131#endif
132
133#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1)
135
136#define NOINLINE attribute ((noinline))
72 137
73#include "CoroAPI.h" 138#include "CoroAPI.h"
74
75#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76 139
77#ifdef USE_ITHREADS 140#ifdef USE_ITHREADS
78static perl_mutex coro_mutex; 141static perl_mutex coro_mutex;
79# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81#else 144#else
82# define LOCK (void)0 145# define LOCK (void)0
83# define UNLOCK (void)0 146# define UNLOCK (void)0
84#endif 147#endif
85 148
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;
86static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
87static 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;
88static HV *coro_state_stash, *coro_stash; 162static HV *coro_state_stash, *coro_stash;
89static 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};
90 190
91/* this is a structure representing a c-level coroutine */ 191/* this is a structure representing a c-level coroutine */
92typedef struct coro_stack { 192typedef struct coro_cctx {
93 struct coro_stack *next; 193 struct coro_cctx *next;
94 194
95 /* the stack */ 195 /* the stack */
96 void *sptr; 196 void *sptr;
97 long ssize; /* positive == mmap, otherwise malloc */ 197 size_t ssize;
98 198
99 /* cpu state */ 199 /* cpu state */
100 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 */
101 JMPENV *top_env; 202 JMPENV *top_env;
102 coro_context cctx; 203 coro_context cctx;
103} coro_stack;
104 204
105/* the (fake) coro_stack representing the main program */ 205#if CORO_USE_VALGRIND
106static 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))
107 230
108/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
109struct coro { 232struct coro {
110 /* the c coroutine allocated to this perl coroutine, if any */ 233 /* the c coroutine allocated to this perl coroutine, if any */
111 coro_stack *stack; 234 coro_cctx *cctx;
112 235
113 /* data associated with this coroutine (initial args) */ 236 /* 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; 237 AV *mainstack;
130 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
131 OP *op; 239
132 SV **curpad; 240 AV *args; /* data associated with this coroutine (initial args) */
133 AV *comppad; 241 int refcnt; /* coroutines are refcounted, yes */
134 CV *compcv; 242 int flags; /* CF_ flags */
135 SV **stack_base; 243 HV *hv; /* the perl hash associated with this coro, if any */
136 SV **stack_max; 244
137 SV **tmps_stack; 245 /* statistics */
138 I32 tmps_floor; 246 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;
155 247
156 /* coro process data */ 248 /* coro process data */
157 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;
158}; 257};
159 258
160typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
161typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
162 261
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
163static AV * 310static AV *
164coro_clone_padlist (pTHX_ CV *cv) 311coro_clone_padlist (pTHX_ CV *cv)
165{ 312{
166 AV *padlist = CvPADLIST (cv); 313 AV *padlist = CvPADLIST (cv);
167 AV *newpadlist, *newpad; 314 AV *newpadlist, *newpad;
168 315
169 newpadlist = newAV (); 316 newpadlist = newAV ();
170 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
171#if PERL_VERSION < 9 318#if PERL_VERSION_ATLEAST (5,10,0)
319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
320#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173#else
174 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175#endif 322#endif
176 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177 --AvFILLp (padlist); 324 --AvFILLp (padlist);
178 325
179 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
… …
214 361
215 /* casting is fun. */ 362 /* casting is fun. */
216 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
217 free_padlist (aTHX_ padlist); 364 free_padlist (aTHX_ padlist);
218 365
219 SvREFCNT_dec (av);
220
221 return 0; 366 return 0;
222} 367}
223 368
224#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
225 371
226static 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))
227 412
228/* the next two functions merely cache the padlists */ 413/* the next two functions merely cache the padlists */
229static void 414static void
230get_padlist (pTHX_ CV *cv) 415get_padlist (pTHX_ CV *cv)
231{ 416{
232 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 417 MAGIC *mg = CORO_MAGIC_cv (cv);
418 AV *av;
233 419
234 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
235 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
236 else 422 else
237 { 423 {
238#if 0 424#if CORO_PREFER_PERL_FUNCTIONS
239 /* this should work - but it doesn't :( */ 425 /* this is probably cleaner, but also slower? */
240 CV *cp = Perl_cv_clone (aTHX_ cv); 426 CV *cp = Perl_cv_clone (cv);
241 CvPADLIST (cv) = CvPADLIST (cp); 427 CvPADLIST (cv) = CvPADLIST (cp);
242 CvPADLIST (cp) = 0; 428 CvPADLIST (cp) = 0;
243 SvREFCNT_dec (cp); 429 SvREFCNT_dec (cp);
244#else 430#else
245 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
248} 434}
249 435
250static void 436static void
251put_padlist (pTHX_ CV *cv) 437put_padlist (pTHX_ CV *cv)
252{ 438{
253 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 439 MAGIC *mg = CORO_MAGIC_cv (cv);
440 AV *av;
254 441
255 if (!mg) 442 if (expect_false (!mg))
256 { 443 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 }
262 444
263 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 445 av = (AV *)mg->mg_obj;
264}
265 446
266#define SB do { 447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
267#define SE } while (0) 448 av_extend (av, AvMAX (av) + 1);
268 449
269#define LOAD(state) load_state(aTHX_ (state)); 450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
270#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 451}
271 452
272#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 453/** load & save, init *******************************************************/
273 454
274static void 455static void
275load_state(pTHX_ Coro__State c) 456load_perl (pTHX_ Coro__State c)
276{ 457{
277 PL_dowarn = c->dowarn; 458 perl_slots *slot = c->slot;
278 PL_in_eval = c->in_eval; 459 c->slot = 0;
279 460
280 PL_curstackinfo = c->curstackinfo;
281 PL_curstack = c->curstack;
282 PL_mainstack = c->mainstack; 461 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;
310 462
311 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 463 GvSV (PL_defgv) = slot->defsv;
312 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 464 GvAV (PL_defgv) = slot->defav;
313 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
314 471
315 { 472 {
316 dSP; 473 dSP;
474
317 CV *cv; 475 CV *cv;
318 476
319 /* now do the ugly restore mess */ 477 /* now do the ugly restore mess */
320 while ((cv = (CV *)POPs)) 478 while (expect_true (cv = (CV *)POPs))
321 { 479 {
322 AV *padlist = (AV *)POPs;
323
324 if (padlist)
325 {
326 put_padlist (aTHX_ cv); /* mark this padlist as available */ 480 put_padlist (aTHX_ cv); /* mark this padlist as available */
327 CvPADLIST(cv) = padlist; 481 CvDEPTH (cv) = PTR2IV (POPs);
328 } 482 CvPADLIST (cv) = (AV *)POPs;
329
330 ++CvDEPTH(cv);
331 } 483 }
332 484
333 PUTBACK; 485 PUTBACK;
334 } 486 }
335} 487}
336 488
337static void 489static void
338save_state(pTHX_ Coro__State c, int flags) 490save_perl (pTHX_ Coro__State c)
339{ 491{
340 { 492 {
341 dSP; 493 dSP;
342 I32 cxix = cxstack_ix; 494 I32 cxix = cxstack_ix;
343 PERL_CONTEXT *ccstk = cxstack; 495 PERL_CONTEXT *ccstk = cxstack;
… …
346 /* 498 /*
347 * 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
348 * (and reinitialize) all cv's in the whole callchain :( 500 * (and reinitialize) all cv's in the whole callchain :(
349 */ 501 */
350 502
351 PUSHs (Nullsv); 503 XPUSHs (Nullsv);
352 /* this loop was inspired by pp_caller */ 504 /* this loop was inspired by pp_caller */
353 for (;;) 505 for (;;)
354 { 506 {
355 while (cxix >= 0) 507 while (expect_true (cxix >= 0))
356 { 508 {
357 PERL_CONTEXT *cx = &ccstk[cxix--]; 509 PERL_CONTEXT *cx = &ccstk[cxix--];
358 510
359 if (CxTYPE(cx) == CXt_SUB) 511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
360 { 512 {
361 CV *cv = cx->blk_sub.cv; 513 CV *cv = cx->blk_sub.cv;
514
362 if (CvDEPTH(cv)) 515 if (expect_true (CvDEPTH (cv)))
363 { 516 {
364 EXTEND (SP, CvDEPTH(cv)*2); 517 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)); 518 PUSHs ((SV *)CvPADLIST (cv));
519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
374 PUSHs ((SV *)cv); 520 PUSHs ((SV *)cv);
375 521
522 CvDEPTH (cv) = 0;
376 get_padlist (aTHX_ cv); 523 get_padlist (aTHX_ cv);
377 } 524 }
378 } 525 }
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 } 526 }
388 527
389 if (top_si->si_type == PERLSI_MAIN) 528 if (expect_true (top_si->si_type == PERLSI_MAIN))
390 break; 529 break;
391 530
392 top_si = top_si->si_prev; 531 top_si = top_si->si_prev;
393 ccstk = top_si->si_cxstack; 532 ccstk = top_si->si_cxstack;
394 cxix = top_si->si_cxix; 533 cxix = top_si->si_cxix;
395 } 534 }
396 535
397 PUTBACK; 536 PUTBACK;
398 } 537 }
399 538
400 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 539 /* allocate some space on the context stack for our purposes */
401 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 540 /* we manually unroll here, as usually 2 slots is enough */
402 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 */
403 550
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; 551 c->mainstack = PL_mainstack;
410 c->stack_sp = PL_stack_sp; 552
411 c->op = PL_op; 553 {
412 c->curpad = PL_curpad; 554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
413 c->comppad = PL_comppad; 555
414 c->compcv = PL_compcv; 556 slot->defav = GvAV (PL_defgv);
415 c->stack_base = PL_stack_base; 557 slot->defsv = DEFSV;
416 c->stack_max = PL_stack_max; 558 slot->errsv = ERRSV;
417 c->tmps_stack = PL_tmps_stack; 559 slot->irsgv = GvSV (irsgv);
418 c->tmps_floor = PL_tmps_floor; 560
419 c->tmps_ix = PL_tmps_ix; 561 #define VAR(name,type) slot->name = PL_ ## name;
420 c->tmps_max = PL_tmps_max; 562 # include "state.h"
421 c->markstack = PL_markstack; 563 #undef VAR
422 c->markstack_ptr = PL_markstack_ptr; 564 }
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} 565}
438 566
439/* 567/*
440 * allocate various perl stacks. This is an exact copy 568 * allocate various perl stacks. This is an exact copy
441 * of perl.c:init_stacks, except that it uses less memory 569 * of perl.c:init_stacks, except that it uses less memory
442 * on the (sometimes correct) assumption that coroutines do 570 * on the (sometimes correct) assumption that coroutines do
443 * not usually need a lot of stackspace. 571 * not usually need a lot of stackspace.
444 */ 572 */
573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
445static void 576static void
446coro_init_stacks (pTHX) 577coro_init_stacks (pTHX)
447{ 578{
448 LOCK; 579 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; 580 PL_curstackinfo->si_type = PERLSI_MAIN;
452 PL_curstack = PL_curstackinfo->si_stack; 581 PL_curstack = PL_curstackinfo->si_stack;
453 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454 583
455 PL_stack_base = AvARRAY(PL_curstack); 584 PL_stack_base = AvARRAY(PL_curstack);
456 PL_stack_sp = PL_stack_base; 585 PL_stack_sp = PL_stack_base;
457 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458 587
459 New(50,PL_tmps_stack,96,SV*); 588 New(50,PL_tmps_stack,32,SV*);
460 PL_tmps_floor = -1; 589 PL_tmps_floor = -1;
461 PL_tmps_ix = -1; 590 PL_tmps_ix = -1;
462 PL_tmps_max = 96; 591 PL_tmps_max = 32;
463 592
464 New(54,PL_markstack,16,I32); 593 New(54,PL_markstack,16,I32);
465 PL_markstack_ptr = PL_markstack; 594 PL_markstack_ptr = PL_markstack;
466 PL_markstack_max = PL_markstack + 16; 595 PL_markstack_max = PL_markstack + 16;
467 596
468#ifdef SET_MARK_OFFSET 597#ifdef SET_MARK_OFFSET
469 SET_MARK_OFFSET; 598 SET_MARK_OFFSET;
470#endif 599#endif
471 600
472 New(54,PL_scopestack,16,I32); 601 New(54,PL_scopestack,8,I32);
473 PL_scopestack_ix = 0; 602 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16; 603 PL_scopestack_max = 8;
475 604
476 New(54,PL_savestack,96,ANY); 605 New(54,PL_savestack,24,ANY);
477 PL_savestack_ix = 0; 606 PL_savestack_ix = 0;
478 PL_savestack_max = 96; 607 PL_savestack_max = 24;
479 608
480#if PERL_VERSION < 9 609#if !PERL_VERSION_ATLEAST (5,10,0)
481 New(54,PL_retstack,8,OP*); 610 New(54,PL_retstack,4,OP*);
482 PL_retstack_ix = 0; 611 PL_retstack_ix = 0;
483 PL_retstack_max = 8; 612 PL_retstack_max = 4;
484#endif 613#endif
485
486 UNLOCK;
487} 614}
615#endif
488 616
489/* 617/*
490 * destroy the stacks, the callchain etc... 618 * destroy the stacks, the callchain etc...
491 */ 619 */
492static void 620static void
493destroy_stacks(pTHX) 621coro_destroy_stacks (pTHX)
494{ 622{
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) 623 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 624 PL_curstackinfo = PL_curstackinfo->si_next;
508 625
509 while (PL_curstackinfo) 626 while (PL_curstackinfo)
510 { 627 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 628 PERL_SI *p = PL_curstackinfo->si_prev;
512 629
513 { /*D*//*remove*/
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (!IN_DESTRUCT) 630 if (!IN_DESTRUCT)
520 {
521 dounwind (-1);/*D*//*remove*/
522 SvREFCNT_dec (PL_curstackinfo->si_stack); 631 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 }
524 632
525 Safefree (PL_curstackinfo->si_cxstack); 633 Safefree (PL_curstackinfo->si_cxstack);
526 Safefree (PL_curstackinfo); 634 Safefree (PL_curstackinfo);
527 PL_curstackinfo = p; 635 PL_curstackinfo = p;
528 } 636 }
529 637
530 Safefree (PL_tmps_stack); 638 Safefree (PL_tmps_stack);
531 Safefree (PL_markstack); 639 Safefree (PL_markstack);
532 Safefree (PL_scopestack); 640 Safefree (PL_scopestack);
533 Safefree (PL_savestack); 641 Safefree (PL_savestack);
534#if PERL_VERSION < 9 642#if !PERL_VERSION_ATLEAST (5,10,0)
535 Safefree (PL_retstack); 643 Safefree (PL_retstack);
536#endif 644#endif
537} 645}
538 646
647static size_t
648coro_rss (pTHX_ struct coro *coro)
649{
650 size_t rss = sizeof (*coro);
651
652 if (coro->mainstack)
653 {
654 perl_slots tmp_slot;
655 perl_slots *slot;
656
657 if (coro->flags & CF_RUNNING)
658 {
659 slot = &tmp_slot;
660
661 #define VAR(name,type) slot->name = PL_ ## name;
662 # include "state.h"
663 #undef VAR
664 }
665 else
666 slot = coro->slot;
667
668 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY);
675
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *);
678#endif
679 }
680
681 return rss;
682}
683
684/** coroutine stack handling ************************************************/
685
686static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
687static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
688
689/*
690 * This overrides the default magic get method of %SIG elements.
691 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
692 * and instead of tryign to save and restore the hash elements, we just provide
693 * readback here.
694 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
695 * not expecting this to actually change the hook. This is a potential problem
696 * when a schedule happens then, but we ignore this.
697 */
698static int
699coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
700{
701 const char *s = MgPV_nolen_const (mg);
702
703 if (*s == '_')
704 {
705 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
706 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
707 }
708
709 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
710}
711
712static int
713coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
714{
715 const char *s = MgPV_nolen_const (mg);
716
717 if (*s == '_')
718 {
719 SV **svp = 0;
720
721 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
722 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
723
724 if (svp)
725 {
726 SV *old = *svp;
727 *svp = newSVsv (sv);
728 SvREFCNT_dec (old);
729 return 0;
730 }
731 }
732
733 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
734}
735
539static void 736static void
540setup_coro (struct coro *coro) 737coro_setup (pTHX_ struct coro *coro)
541{ 738{
542 /* 739 /*
543 * emulate part of the perl startup here. 740 * emulate part of the perl startup here.
544 */ 741 */
545 dTHX; 742 coro_init_stacks (aTHX);
743
744 PL_runops = RUNOPS_DEFAULT;
745 PL_curcop = &PL_compiling;
746 PL_in_eval = EVAL_NULL;
747 PL_comppad = 0;
748 PL_curpm = 0;
749 PL_curpad = 0;
750 PL_localizing = 0;
751 PL_dirty = 0;
752 PL_restartop = 0;
753#if PERL_VERSION_ATLEAST (5,10,0)
754 PL_parser = 0;
755#endif
756
757 /* recreate the die/warn hooks */
758 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
759 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
760
761 GvSV (PL_defgv) = newSV (0);
762 GvAV (PL_defgv) = coro->args; coro->args = 0;
763 GvSV (PL_errgv) = newSV (0);
764 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
765 PL_rs = newSVsv (GvSV (irsgv));
766 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
767
768 {
769 dSP;
770 LOGOP myop;
771
772 Zero (&myop, 1, LOGOP);
773 myop.op_next = Nullop;
774 myop.op_flags = OPf_WANT_VOID;
775
776 PUSHMARK (SP);
777 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
778 PUTBACK;
779 PL_op = (OP *)&myop;
780 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
781 SPAGAIN;
782 }
783
784 /* this newly created coroutine might be run on an existing cctx which most
785 * likely was suspended in set_stacklevel, called from entersub.
786 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
787 * so we ENTER here for symmetry
788 */
789 ENTER;
790}
791
792static void
793coro_destroy (pTHX_ struct coro *coro)
794{
795 if (!IN_DESTRUCT)
796 {
797 /* restore all saved variables and stuff */
798 LEAVE_SCOPE (0);
799 assert (PL_tmps_floor == -1);
800
801 /* free all temporaries */
802 FREETMPS;
803 assert (PL_tmps_ix == -1);
804
805 /* unwind all extra stacks */
806 POPSTACK_TO (PL_mainstack);
807
808 /* unwind main stack */
809 dounwind (-1);
810 }
811
812 SvREFCNT_dec (GvSV (PL_defgv));
813 SvREFCNT_dec (GvAV (PL_defgv));
814 SvREFCNT_dec (GvSV (PL_errgv));
815 SvREFCNT_dec (PL_defoutgv);
816 SvREFCNT_dec (PL_rs);
817 SvREFCNT_dec (GvSV (irsgv));
818
819 SvREFCNT_dec (PL_diehook);
820 SvREFCNT_dec (PL_warnhook);
821
822 SvREFCNT_dec (coro->saved_deffh);
823 SvREFCNT_dec (coro->throw);
824
825 coro_destroy_stacks (aTHX);
826}
827
828static void
829free_coro_mortal (pTHX)
830{
831 if (expect_true (coro_mortal))
832 {
833 SvREFCNT_dec (coro_mortal);
834 coro_mortal = 0;
835 }
836}
837
838static int
839runops_trace (pTHX)
840{
841 COP *oldcop = 0;
842 int oldcxix = -2;
843 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
844 coro_cctx *cctx = coro->cctx;
845
846 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
847 {
848 PERL_ASYNC_CHECK ();
849
850 if (cctx->flags & CC_TRACE_ALL)
851 {
852 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
853 {
854 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
855 SV **bot, **top;
856 AV *av = newAV (); /* return values */
857 SV **cb;
858 dSP;
859
860 GV *gv = CvGV (cx->blk_sub.cv);
861 SV *fullname = sv_2mortal (newSV (0));
862 if (isGV (gv))
863 gv_efullname3 (fullname, gv, 0);
864
865 bot = PL_stack_base + cx->blk_oldsp + 1;
866 top = cx->blk_gimme == G_ARRAY ? SP + 1
867 : cx->blk_gimme == G_SCALAR ? bot + 1
868 : bot;
869
870 av_extend (av, top - bot);
871 while (bot < top)
872 av_push (av, SvREFCNT_inc (*bot++));
873
874 PL_runops = RUNOPS_DEFAULT;
875 ENTER;
876 SAVETMPS;
877 EXTEND (SP, 3);
878 PUSHMARK (SP);
879 PUSHs (&PL_sv_no);
880 PUSHs (fullname);
881 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
882 PUTBACK;
883 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
884 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
885 SPAGAIN;
886 FREETMPS;
887 LEAVE;
888 PL_runops = runops_trace;
889 }
890
891 if (oldcop != PL_curcop)
892 {
893 oldcop = PL_curcop;
894
895 if (PL_curcop != &PL_compiling)
896 {
897 SV **cb;
898
899 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
900 {
901 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
902
903 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
904 {
905 runops_proc_t old_runops = PL_runops;
906 dSP;
907 GV *gv = CvGV (cx->blk_sub.cv);
908 SV *fullname = sv_2mortal (newSV (0));
909
910 if (isGV (gv))
911 gv_efullname3 (fullname, gv, 0);
912
913 PL_runops = RUNOPS_DEFAULT;
914 ENTER;
915 SAVETMPS;
916 EXTEND (SP, 3);
917 PUSHMARK (SP);
918 PUSHs (&PL_sv_yes);
919 PUSHs (fullname);
920 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
921 PUTBACK;
922 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
923 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
924 SPAGAIN;
925 FREETMPS;
926 LEAVE;
927 PL_runops = runops_trace;
928 }
929
930 oldcxix = cxstack_ix;
931 }
932
933 if (cctx->flags & CC_TRACE_LINE)
934 {
935 dSP;
936
937 PL_runops = RUNOPS_DEFAULT;
938 ENTER;
939 SAVETMPS;
940 EXTEND (SP, 3);
941 PL_runops = RUNOPS_DEFAULT;
942 PUSHMARK (SP);
943 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
944 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
945 PUTBACK;
946 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
947 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
948 SPAGAIN;
949 FREETMPS;
950 LEAVE;
951 PL_runops = runops_trace;
952 }
953 }
954 }
955 }
956 }
957
958 TAINT_NOT;
959 return 0;
960}
961
962/* inject a fake call to Coro::State::_cctx_init into the execution */
963/* _cctx_init should be careful, as it could be called at almost any time */
964/* during execution of a perl program */
965static void NOINLINE
966cctx_prepare (pTHX_ coro_cctx *cctx)
967{
546 dSP; 968 dSP;
547 UNOP myop; 969 LOGOP myop;
548 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
549 970
550 coro_init_stacks (aTHX); 971 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;
555 972
556 SPAGAIN; 973 if (cctx->flags & CC_TRACE)
974 PL_runops = runops_trace;
557 975
558 Zero (&myop, 1, UNOP); 976 Zero (&myop, 1, LOGOP);
559 myop.op_next = Nullop; 977 myop.op_next = PL_op;
560 myop.op_flags = OPf_WANT_VOID; 978 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
561 979
980 PUSHMARK (SP);
981 EXTEND (SP, 2);
982 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
983 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
984 PUTBACK;
562 PL_op = (OP *)&myop; 985 PL_op = (OP *)&myop;
563
564 PUSHMARK(SP);
565 XPUSHs (sub_init);
566 PUTBACK;
567 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 986 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568 SPAGAIN; 987 SPAGAIN;
569
570 ENTER; /* necessary e.g. for dounwind */
571} 988}
572 989
990/*
991 * this is a _very_ stripped down perl interpreter ;)
992 */
573static void 993static void
574free_coro_mortal () 994cctx_run (void *arg)
575{ 995{
576 if (coro_mortal) 996 dTHX;
577 { 997
578 SvREFCNT_dec (coro_mortal); 998 /* cctx_run is the alternative tail of transfer(), so unlock here. */
579 coro_mortal = 0; 999 UNLOCK;
1000
1001 /* we now skip the entersub that lead to transfer() */
1002 PL_op = PL_op->op_next;
1003
1004 /* inject a fake subroutine call to cctx_init */
1005 cctx_prepare (aTHX_ (coro_cctx *)arg);
1006
1007 /* somebody or something will hit me for both perl_run and PL_restartop */
1008 PL_restartop = PL_op;
1009 perl_run (PL_curinterp);
1010
1011 /*
1012 * If perl-run returns we assume exit() was being called or the coro
1013 * fell off the end, which seems to be the only valid (non-bug)
1014 * reason for perl_run to return. We try to exit by jumping to the
1015 * bootstrap-time "top" top_env, as we cannot restore the "main"
1016 * coroutine as Coro has no such concept
1017 */
1018 PL_top_env = main_top_env;
1019 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1020}
1021
1022static coro_cctx *
1023cctx_new ()
1024{
1025 coro_cctx *cctx;
1026 void *stack_start;
1027 size_t stack_size;
1028
1029 ++cctx_count;
1030
1031 Newz (0, cctx, 1, coro_cctx);
1032
1033#if HAVE_MMAP
1034 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1035 /* mmap supposedly does allocate-on-write for us */
1036 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1037
1038 if (cctx->sptr != (void *)-1)
580 } 1039 {
1040# if CORO_STACKGUARD
1041 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1042# endif
1043 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1044 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1045 cctx->flags |= CC_MAPPED;
1046 }
1047 else
1048#endif
1049 {
1050 cctx->ssize = coro_stacksize * (long)sizeof (long);
1051 New (0, cctx->sptr, coro_stacksize, long);
1052
1053 if (!cctx->sptr)
1054 {
1055 perror ("FATAL: unable to allocate stack for coroutine");
1056 _exit (EXIT_FAILURE);
1057 }
1058
1059 stack_start = cctx->sptr;
1060 stack_size = cctx->ssize;
1061 }
1062
1063 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1064 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1065
1066 return cctx;
581} 1067}
582 1068
583static void 1069static void
584coro_run (void *arg) 1070cctx_destroy (coro_cctx *cctx)
585{ 1071{
586 /* 1072 if (!cctx)
587 * this is a _very_ stripped down perl interpreter ;) 1073 return;
588 */
589 dTHX;
590 1074
591 UNLOCK; 1075 --cctx_count;
592 1076
593 PL_top_env = &PL_start_env; 1077#if CORO_USE_VALGRIND
594 1078 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
595 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1079#endif
596 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
597
598 /* continue at cctx_init, without entersub */
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 1080
614#if HAVE_MMAP 1081#if HAVE_MMAP
1082 if (cctx->flags & CC_MAPPED)
1083 munmap (cctx->sptr, cctx->ssize);
1084 else
1085#endif
1086 Safefree (cctx->sptr);
615 1087
616 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 1088 Safefree (cctx);
617 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1089}
618 1090
619 if (stack->sptr == (void *)-1) 1091/* wether this cctx should be destructed */
620 { 1092#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
621 perror ("FATAL: unable to mmap stack for coroutine"); 1093
622 _exit (EXIT_FAILURE); 1094static coro_cctx *
1095cctx_get (pTHX)
1096{
1097 while (expect_true (cctx_first))
623 } 1098 {
1099 coro_cctx *cctx = cctx_first;
1100 cctx_first = cctx->next;
1101 --cctx_idle;
624 1102
625 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1103 if (expect_true (!CCTX_EXPIRED (cctx)))
1104 return cctx;
626 1105
627#else 1106 cctx_destroy (cctx);
628
629 stack->ssize = STACKSIZE * (long)sizeof (long);
630 New (0, stack->sptr, STACKSIZE, long);
631
632 if (!stack->sptr)
633 { 1107 }
634 perror (stderr, "FATAL: unable to malloc stack for coroutine");
635 _exit (EXIT_FAILURE);
636 }
637 1108
638#endif 1109 return cctx_new ();
639
640 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
641
642 return stack;
643} 1110}
644 1111
645static void 1112static void
646stack_free (coro_stack *stack) 1113cctx_put (coro_cctx *cctx)
647{ 1114{
648 if (!stack || stack == main_stack) 1115 /* free another cctx if overlimit */
649 return; 1116 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
650
651#if HAVE_MMAP
652 munmap (stack->sptr, stack->ssize);
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 { 1117 {
674 stack = stack_new (); 1118 coro_cctx *first = cctx_first;
675 PL_op = PL_op->op_next; 1119 cctx_first = first->next;
1120 --cctx_idle;
1121
1122 cctx_destroy (first);
676 } 1123 }
677 1124
678 return stack; 1125 ++cctx_idle;
1126 cctx->next = cctx_first;
1127 cctx_first = cctx;
679} 1128}
1129
1130/** coroutine switching *****************************************************/
680 1131
681static void 1132static void
682stack_put (coro_stack *stack) 1133transfer_check (pTHX_ struct coro *prev, struct coro *next)
683{ 1134{
684 stack->next = stack_first; 1135 if (expect_true (prev != next))
685 stack_first = stack; 1136 {
686} 1137 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1138 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
687 1139
688/* never call directly, always through the coro_state_transfer global variable */ 1140 if (expect_false (next->flags & CF_RUNNING))
689static void 1141 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1142
1143 if (expect_false (next->flags & CF_DESTROYED))
1144 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1145
1146#if !PERL_VERSION_ATLEAST (5,10,0)
1147 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1148 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1149#endif
1150 }
1151}
1152
1153/* always use the TRANSFER macro */
1154static void NOINLINE
690transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1155transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
691{ 1156{
692 dSTACKLEVEL; 1157 dSTACKLEVEL;
1158 static volatile int has_throw;
693 1159
694 /* sometimes transfer is only called to set idle_sp */ 1160 /* sometimes transfer is only called to set idle_sp */
695 if (flags == TRANSFER_SET_STACKLEVEL) 1161 if (expect_false (!next))
1162 {
696 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1163 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
697 else if (prev != next) 1164 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
698 { 1165 }
1166 else if (expect_true (prev != next))
1167 {
699 coro_stack *prev__stack; 1168 coro_cctx *prev__cctx;
1169
1170 if (expect_false (prev->flags & CF_NEW))
1171 {
1172 /* create a new empty context */
1173 Newz (0, prev->cctx, 1, coro_cctx);
1174 prev->flags &= ~CF_NEW;
1175 prev->flags |= CF_RUNNING;
1176 }
1177
1178 prev->flags &= ~CF_RUNNING;
1179 next->flags |= CF_RUNNING;
700 1180
701 LOCK; 1181 LOCK;
702 1182
703 if (next->mainstack) 1183 /* first get rid of the old state */
1184 save_perl (aTHX_ prev);
1185
1186 if (expect_false (next->flags & CF_NEW))
704 { 1187 {
705 /* coroutine already started */ 1188 /* need to start coroutine */
706 SAVE (prev, flags); 1189 next->flags &= ~CF_NEW;
707 LOAD (next); 1190 /* setup coroutine call */
1191 coro_setup (aTHX_ next);
708 } 1192 }
709 else 1193 else
1194 load_perl (aTHX_ next);
1195
1196 prev__cctx = prev->cctx;
1197
1198 /* possibly "free" the cctx */
1199 if (expect_true (
1200 prev__cctx->idle_sp == STACKLEVEL
1201 && !(prev__cctx->flags & CC_TRACE)
1202 && !force_cctx
1203 ))
710 { 1204 {
711 /* need to start coroutine */ 1205 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
712 /* first get rid of the old state */ 1206 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
713 SAVE (prev, -1); 1207
714 /* setup coroutine call */ 1208 prev->cctx = 0;
715 setup_coro (next); 1209
716 /* need a stack */ 1210 /* 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; 1211 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1212 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1213 if (!next->cctx)
1214 next->cctx = cctx_get (aTHX);
1215
1216 cctx_put (prev__cctx);
718 } 1217 }
719 1218
720 prev__stack = prev->stack; 1219 ++next->usecount;
721 1220
722 /* possibly "free" the stack */ 1221 if (expect_true (!next->cctx))
723 if (prev__stack->idle_sp == STACKLEVEL) 1222 next->cctx = cctx_get (aTHX);
1223
1224 has_throw = !!next->throw;
1225
1226 if (expect_false (prev__cctx != next->cctx))
724 { 1227 {
725 stack_put (prev__stack); 1228 prev__cctx->top_env = PL_top_env;
726 prev->stack = 0; 1229 PL_top_env = next->cctx->top_env;
1230 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
727 } 1231 }
728 1232
729 if (!next->stack) 1233 free_coro_mortal (aTHX);
730 next->stack = stack_get (); 1234 UNLOCK;
731 1235
732 if (prev__stack != next->stack) 1236 if (expect_false (has_throw))
733 { 1237 {
734 prev__stack->top_env = PL_top_env; 1238 struct coro *coro = SvSTATE (coro_current);
735 PL_top_env = next->stack->top_env; 1239
736 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1240 if (coro->throw)
1241 {
1242 SV *exception = coro->throw;
1243 coro->throw = 0;
1244 sv_setsv (ERRSV, exception);
1245 croak (0);
1246 }
737 } 1247 }
1248 }
1249}
738 1250
739 free_coro_mortal (); 1251struct transfer_args
1252{
1253 struct coro *prev, *next;
1254};
740 1255
1256#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1257#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1258
1259/** high level stuff ********************************************************/
1260
1261static int
1262coro_state_destroy (pTHX_ struct coro *coro)
1263{
1264 if (coro->flags & CF_DESTROYED)
1265 return 0;
1266
1267 coro->flags |= CF_DESTROYED;
1268
1269 if (coro->flags & CF_READY)
1270 {
1271 /* reduce nready, as destroying a ready coro effectively unreadies it */
1272 /* alternative: look through all ready queues and remove the coro */
1273 LOCK;
1274 --coro_nready;
741 UNLOCK; 1275 UNLOCK;
742 } 1276 }
743} 1277 else
744 1278 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 1279
764 if (coro->mainstack && coro->mainstack != main_mainstack) 1280 if (coro->mainstack && coro->mainstack != main_mainstack)
765 { 1281 {
766 struct coro temp; 1282 struct coro temp;
767 1283
768 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1284 if (coro->flags & CF_RUNNING)
1285 croak ("FATAL: tried to destroy currently running coroutine");
1286
1287 save_perl (aTHX_ &temp);
769 LOAD (aTHX_ coro); 1288 load_perl (aTHX_ coro);
770 1289
771 destroy_stacks (aTHX); 1290 coro_destroy (aTHX_ coro);
772 1291
773 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1292 load_perl (aTHX_ &temp);
774 1293
775 coro->mainstack = 0; 1294 coro->slot = 0;
776 } 1295 }
777 1296
778 stack_free (coro->stack); 1297 cctx_destroy (coro->cctx);
779 SvREFCNT_dec (coro->args); 1298 SvREFCNT_dec (coro->args);
780 Safefree (coro); 1299
1300 if (coro->next) coro->next->prev = coro->prev;
1301 if (coro->prev) coro->prev->next = coro->next;
1302 if (coro == coro_first) coro_first = coro->next;
1303
1304 return 1;
781} 1305}
782 1306
783static int 1307static int
784coro_state_clear (SV *sv, MAGIC *mg) 1308coro_state_free (pTHX_ SV *sv, MAGIC *mg)
785{ 1309{
786 struct coro *coro = (struct coro *)mg->mg_ptr; 1310 struct coro *coro = (struct coro *)mg->mg_ptr;
787 mg->mg_ptr = 0; 1311 mg->mg_ptr = 0;
788 1312
1313 coro->hv = 0;
1314
1315 if (--coro->refcnt < 0)
1316 {
789 coro_state_destroy (coro); 1317 coro_state_destroy (aTHX_ coro);
1318 Safefree (coro);
1319 }
790 1320
791 return 0; 1321 return 0;
792} 1322}
793 1323
794static int 1324static int
795coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1325coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
796{ 1326{
797 struct coro *coro = (struct coro *)mg->mg_ptr; 1327 struct coro *coro = (struct coro *)mg->mg_ptr;
798 1328
799 ++coro->refcnt; 1329 ++coro->refcnt;
800 1330
801 return 0; 1331 return 0;
802} 1332}
803 1333
804static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1334static MGVTBL coro_state_vtbl = {
805 1335 0, 0, 0, 0,
806static struct coro * 1336 coro_state_free,
807SvSTATE (SV *coro) 1337 0,
808{ 1338#ifdef MGf_DUP
809 HV *stash; 1339 coro_state_dup,
810 MAGIC *mg; 1340#else
811 1341# define MGf_DUP 0
812 if (SvROK (coro)) 1342#endif
813 coro = SvRV (coro); 1343};
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 1344
828static void 1345static void
829prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags) 1346prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
830{ 1347{
831 ta->prev = SvSTATE (prev); 1348 ta->prev = SvSTATE (prev_sv);
832 ta->next = SvSTATE (next); 1349 ta->next = SvSTATE (next_sv);
833 ta->flags = flags; 1350 TRANSFER_CHECK (*ta);
834} 1351}
835 1352
836static void 1353static void
837api_transfer (SV *prev, SV *next, int flags) 1354api_transfer (SV *prev_sv, SV *next_sv)
838{ 1355{
839 dTHX; 1356 dTHX;
840 struct transfer_args ta; 1357 struct transfer_args ta;
841 1358
842 prepare_transfer (aTHX_ &ta, prev, next, flags); 1359 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
843 TRANSFER (ta); 1360 TRANSFER (ta, 1);
844} 1361}
845 1362
846/** Coro ********************************************************************/ 1363/** Coro ********************************************************************/
847 1364
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 1365static void
861coro_enq (pTHX_ SV *sv) 1366coro_enq (pTHX_ SV *coro_sv)
1367{
1368 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1369}
1370
1371static SV *
1372coro_deq (pTHX)
862{ 1373{
863 int prio; 1374 int prio;
864 1375
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; ) 1376 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
884 if (AvFILLp (coro_ready [prio]) >= 0) 1377 if (AvFILLp (coro_ready [prio]) >= 0)
885 {
886 coro_nready--;
887 return av_shift (coro_ready [prio]); 1378 return av_shift (coro_ready [prio]);
888 }
889 1379
890 return 0; 1380 return 0;
891} 1381}
892 1382
1383static int
1384api_ready (SV *coro_sv)
1385{
1386 dTHX;
1387 struct coro *coro;
1388 SV *hook;
1389
1390 if (SvROK (coro_sv))
1391 coro_sv = SvRV (coro_sv);
1392
1393 coro = SvSTATE (coro_sv);
1394
1395 if (coro->flags & CF_READY)
1396 return 0;
1397
1398 coro->flags |= CF_READY;
1399
1400 LOCK;
1401
1402 hook = coro_nready ? 0 : coro_readyhook;
1403
1404 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1405 ++coro_nready;
1406
1407 UNLOCK;
1408
1409 if (hook)
1410 {
1411 dSP;
1412
1413 ENTER;
1414 SAVETMPS;
1415
1416 PUSHMARK (SP);
1417 PUTBACK;
1418 call_sv (hook, G_DISCARD);
1419 SPAGAIN;
1420
1421 FREETMPS;
1422 LEAVE;
1423 }
1424
1425 return 1;
1426}
1427
1428static int
1429api_is_ready (SV *coro_sv)
1430{
1431 dTHX;
1432 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1433}
1434
893static void 1435static void
894api_ready (SV *coro) 1436prepare_schedule (pTHX_ struct transfer_args *ta)
895{ 1437{
896 dTHX; 1438 SV *prev_sv, *next_sv;
897 1439
898 if (SvROK (coro)) 1440 for (;;)
899 coro = SvRV (coro); 1441 {
1442 LOCK;
1443 next_sv = coro_deq (aTHX);
1444
1445 /* nothing to schedule: call the idle handler */
1446 if (expect_false (!next_sv))
1447 {
1448 dSP;
1449 UNLOCK;
1450
1451 ENTER;
1452 SAVETMPS;
1453
1454 PUSHMARK (SP);
1455 PUTBACK;
1456 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1457 SPAGAIN;
1458
1459 FREETMPS;
1460 LEAVE;
1461 continue;
1462 }
1463
1464 ta->next = SvSTATE (next_sv);
1465
1466 /* cannot transfer to destroyed coros, skip and look for next */
1467 if (expect_false (ta->next->flags & CF_DESTROYED))
1468 {
1469 UNLOCK;
1470 SvREFCNT_dec (next_sv);
1471 /* coro_nready is already taken care of by destroy */
1472 continue;
1473 }
1474
1475 --coro_nready;
1476 UNLOCK;
1477 break;
1478 }
1479
1480 /* free this only after the transfer */
1481 prev_sv = SvRV (coro_current);
1482 ta->prev = SvSTATE (prev_sv);
1483 TRANSFER_CHECK (*ta);
1484 assert (ta->next->flags & CF_READY);
1485 ta->next->flags &= ~CF_READY;
1486 SvRV_set (coro_current, next_sv);
900 1487
901 LOCK; 1488 LOCK;
902 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1489 free_coro_mortal (aTHX);
1490 coro_mortal = prev_sv;
903 UNLOCK; 1491 UNLOCK;
904} 1492}
905 1493
906static void 1494static 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) 1495prepare_cede (pTHX_ struct transfer_args *ta)
957{ 1496{
958 LOCK; 1497 api_ready (coro_current);
959 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
960 UNLOCK;
961
962 prepare_schedule (ta); 1498 prepare_schedule (aTHX_ ta);
1499}
1500
1501static int
1502prepare_cede_notself (pTHX_ struct transfer_args *ta)
1503{
1504 if (coro_nready)
1505 {
1506 SV *prev = SvRV (coro_current);
1507 prepare_schedule (aTHX_ ta);
1508 api_ready (prev);
1509 return 1;
1510 }
1511 else
1512 return 0;
963} 1513}
964 1514
965static void 1515static void
966api_schedule (void) 1516api_schedule (void)
967{ 1517{
968 dTHX; 1518 dTHX;
969 struct transfer_args ta; 1519 struct transfer_args ta;
970 1520
971 prepare_schedule (&ta); 1521 prepare_schedule (aTHX_ &ta);
972 TRANSFER (ta); 1522 TRANSFER (ta, 1);
973} 1523}
974 1524
975static void 1525static int
976api_cede (void) 1526api_cede (void)
977{ 1527{
978 dTHX; 1528 dTHX;
979 struct transfer_args ta; 1529 struct transfer_args ta;
980 1530
981 prepare_cede (&ta); 1531 prepare_cede (aTHX_ &ta);
1532
1533 if (expect_true (ta.prev != ta.next))
1534 {
982 TRANSFER (ta); 1535 TRANSFER (ta, 1);
1536 return 1;
1537 }
1538 else
1539 return 0;
983} 1540}
984 1541
1542static int
1543api_cede_notself (void)
1544{
1545 dTHX;
1546 struct transfer_args ta;
1547
1548 if (prepare_cede_notself (aTHX_ &ta))
1549 {
1550 TRANSFER (ta, 1);
1551 return 1;
1552 }
1553 else
1554 return 0;
1555}
1556
1557static void
1558api_trace (SV *coro_sv, int flags)
1559{
1560 dTHX;
1561 struct coro *coro = SvSTATE (coro_sv);
1562
1563 if (flags & CC_TRACE)
1564 {
1565 if (!coro->cctx)
1566 coro->cctx = cctx_new ();
1567 else if (!(coro->cctx->flags & CC_TRACE))
1568 croak ("cannot enable tracing on coroutine with custom stack");
1569
1570 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1571 }
1572 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1573 {
1574 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1575
1576 if (coro->flags & CF_RUNNING)
1577 PL_runops = RUNOPS_DEFAULT;
1578 else
1579 coro->slot->runops = RUNOPS_DEFAULT;
1580 }
1581}
1582
985MODULE = Coro::State PACKAGE = Coro::State 1583MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
986 1584
987PROTOTYPES: DISABLE 1585PROTOTYPES: DISABLE
988 1586
989BOOT: 1587BOOT:
990{ 1588{
991#ifdef USE_ITHREADS 1589#ifdef USE_ITHREADS
992 MUTEX_INIT (&coro_mutex); 1590 MUTEX_INIT (&coro_mutex);
993#endif 1591#endif
994 BOOT_PAGESIZE; 1592 BOOT_PAGESIZE;
995 1593
1594 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1595 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1596
1597 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1598 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1599 orig_sigelem_set = PL_vtbl_sigelem.svt_set;
1600 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1601
1602 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1603 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1604 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1605
996 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1606 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
997 1607
998 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1608 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
999 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1609 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1000 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1610 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1611 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1001 1612
1002 main_mainstack = PL_mainstack; 1613 main_mainstack = PL_mainstack;
1614 main_top_env = PL_top_env;
1615
1616 while (main_top_env->je_prev)
1617 main_top_env = main_top_env->je_prev;
1003 1618
1004 coroapi.ver = CORO_API_VERSION; 1619 coroapi.ver = CORO_API_VERSION;
1620 coroapi.rev = CORO_API_REVISION;
1005 coroapi.transfer = api_transfer; 1621 coroapi.transfer = api_transfer;
1006
1007 Newz (0, main_stack, 1, coro_stack);
1008 main_stack->idle_sp = (void *)-1;
1009 1622
1010 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1623 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011} 1624}
1012 1625
1013SV * 1626SV *
1014new (char *klass, ...) 1627new (char *klass, ...)
1015 CODE: 1628 CODE:
1016{ 1629{
1017 struct coro *coro; 1630 struct coro *coro;
1631 MAGIC *mg;
1018 HV *hv; 1632 HV *hv;
1019 int i; 1633 int i;
1020 1634
1021 Newz (0, coro, 1, struct coro); 1635 Newz (0, coro, 1, struct coro);
1022 coro->args = newAV (); 1636 coro->args = newAV ();
1637 coro->flags = CF_NEW;
1023 1638
1639 if (coro_first) coro_first->prev = coro;
1640 coro->next = coro_first;
1641 coro_first = coro;
1642
1024 hv = newHV (); 1643 coro->hv = hv = newHV ();
1025 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1644 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1645 mg->mg_flags |= MGf_DUP;
1026 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1646 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027 1647
1648 av_extend (coro->args, items - 1);
1028 for (i = 1; i < items; i++) 1649 for (i = 1; i < items; i++)
1029 av_push (coro->args, newSVsv (ST (i))); 1650 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} 1651}
1035 OUTPUT: 1652 OUTPUT:
1036 RETVAL 1653 RETVAL
1037 1654
1655# these not obviously related functions are all rolled into the same xs
1656# function to increase chances that they all will call transfer with the same
1657# stack offset
1038void 1658void
1039transfer (...) 1659_set_stacklevel (...)
1040 ALIAS: 1660 ALIAS:
1041 Coro::schedule = 1 1661 Coro::State::transfer = 1
1042 Coro::cede = 2 1662 Coro::schedule = 2
1043 _set_stacklevel = 3 1663 Coro::cede = 3
1664 Coro::cede_notself = 4
1044 CODE: 1665 CODE:
1045{ 1666{
1046 struct transfer_args ta; 1667 struct transfer_args ta;
1047 1668
1669 PUTBACK;
1048 switch (ix) 1670 switch (ix)
1049 { 1671 {
1050 case 0: 1672 case 0:
1051 if (items != 3) 1673 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1052 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1674 ta.next = 0;
1053
1054 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1055 break; 1675 break;
1056 1676
1057 case 1: 1677 case 1:
1058 prepare_schedule (&ta); 1678 if (items != 2)
1679 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1680
1681 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1059 break; 1682 break;
1060 1683
1061 case 2: 1684 case 2:
1062 prepare_cede (&ta); 1685 prepare_schedule (aTHX_ &ta);
1063 break; 1686 break;
1064 1687
1065 case 3: 1688 case 3:
1066 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1689 prepare_cede (aTHX_ &ta);
1067 ta.next = 0; 1690 break;
1068 ta.flags = TRANSFER_SET_STACKLEVEL; 1691
1692 case 4:
1693 if (!prepare_cede_notself (aTHX_ &ta))
1694 XSRETURN_EMPTY;
1695
1069 break; 1696 break;
1070 } 1697 }
1698 SPAGAIN;
1071 1699
1700 BARRIER;
1701 PUTBACK;
1072 TRANSFER (ta); 1702 TRANSFER (ta, 0);
1703 SPAGAIN; /* might be the sp of a different coroutine now */
1704 /* be extra careful not to ever do anything after TRANSFER */
1073} 1705}
1706
1707bool
1708_destroy (SV *coro_sv)
1709 CODE:
1710 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1711 OUTPUT:
1712 RETVAL
1074 1713
1075void 1714void
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) 1715_exit (int code)
1095 int code
1096 PROTOTYPE: $ 1716 PROTOTYPE: $
1097 CODE: 1717 CODE:
1098 _exit (code); 1718 _exit (code);
1099 1719
1100MODULE = Coro::State PACKAGE = Coro::Cont 1720int
1721cctx_stacksize (int new_stacksize = 0)
1722 CODE:
1723 RETVAL = coro_stacksize;
1724 if (new_stacksize)
1725 coro_stacksize = new_stacksize;
1726 OUTPUT:
1727 RETVAL
1728
1729int
1730cctx_count ()
1731 CODE:
1732 RETVAL = cctx_count;
1733 OUTPUT:
1734 RETVAL
1735
1736int
1737cctx_idle ()
1738 CODE:
1739 RETVAL = cctx_idle;
1740 OUTPUT:
1741 RETVAL
1101 1742
1102void 1743void
1103yield (...) 1744list ()
1104 PROTOTYPE: @ 1745 PPCODE:
1746{
1747 struct coro *coro;
1748 for (coro = coro_first; coro; coro = coro->next)
1749 if (coro->hv)
1750 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1751}
1752
1753void
1754call (Coro::State coro, SV *coderef)
1755 ALIAS:
1756 eval = 1
1757 CODE:
1758{
1759 if (coro->mainstack)
1760 {
1761 struct coro temp;
1762
1763 if (!(coro->flags & CF_RUNNING))
1764 {
1765 PUTBACK;
1766 save_perl (aTHX_ &temp);
1767 load_perl (aTHX_ coro);
1768 }
1769
1770 {
1771 dSP;
1772 ENTER;
1773 SAVETMPS;
1774 PUTBACK;
1775 PUSHSTACK;
1776 PUSHMARK (SP);
1777
1778 if (ix)
1779 eval_sv (coderef, 0);
1780 else
1781 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1782
1783 POPSTACK;
1784 SPAGAIN;
1785 FREETMPS;
1786 LEAVE;
1787 PUTBACK;
1788 }
1789
1790 if (!(coro->flags & CF_RUNNING))
1791 {
1792 save_perl (aTHX_ coro);
1793 load_perl (aTHX_ &temp);
1794 SPAGAIN;
1795 }
1796 }
1797}
1798
1799SV *
1800is_ready (Coro::State coro)
1801 PROTOTYPE: $
1802 ALIAS:
1803 is_ready = CF_READY
1804 is_running = CF_RUNNING
1805 is_new = CF_NEW
1806 is_destroyed = CF_DESTROYED
1807 CODE:
1808 RETVAL = boolSV (coro->flags & ix);
1809 OUTPUT:
1810 RETVAL
1811
1812void
1813api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1814
1815SV *
1816has_cctx (Coro::State coro)
1817 PROTOTYPE: $
1818 CODE:
1819 RETVAL = boolSV (!!coro->cctx);
1820 OUTPUT:
1821 RETVAL
1822
1823int
1824is_traced (Coro::State coro)
1825 PROTOTYPE: $
1826 CODE:
1827 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1828 OUTPUT:
1829 RETVAL
1830
1831IV
1832rss (Coro::State coro)
1833 PROTOTYPE: $
1834 ALIAS:
1835 usecount = 1
1105 CODE: 1836 CODE:
1106{ 1837 switch (ix)
1107 SV *yieldstack; 1838 {
1108 SV *sv; 1839 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1109 AV *defav = GvAV (PL_defgv); 1840 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 1841 }
1116 ); 1842 OUTPUT:
1843 RETVAL
1117 1844
1118 /* set up @_ -- ugly */ 1845void
1119 av_clear (defav); 1846force_cctx ()
1120 av_fill (defav, items - 1); 1847 CODE:
1121 while (items--) 1848 struct coro *coro = SvSTATE (coro_current);
1122 av_store (defav, items, SvREFCNT_inc (ST(items))); 1849 coro->cctx->idle_sp = 0;
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 1850
1132MODULE = Coro::State PACKAGE = Coro 1851MODULE = Coro::State PACKAGE = Coro
1133 1852
1134BOOT: 1853BOOT:
1135{ 1854{
1136 int i; 1855 int i;
1137 1856
1857 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1858 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1859 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1860
1861 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1862 SvREADONLY_on (coro_current);
1863
1138 coro_stash = gv_stashpv ("Coro", TRUE); 1864 coro_stash = gv_stashpv ("Coro", TRUE);
1139 1865
1140 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1866 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1141 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1867 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1142 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1868 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1143 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1869 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1144 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1870 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1145 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1871 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1146 1872
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--; ) 1873 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1151 coro_ready[i] = newAV (); 1874 coro_ready[i] = newAV ();
1152 1875
1153 { 1876 {
1154 SV *sv = perl_get_sv("Coro::API", 1); 1877 SV *sv = perl_get_sv ("Coro::API", TRUE);
1878 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1155 1879
1156 coroapi.schedule = api_schedule; 1880 coroapi.schedule = api_schedule;
1157 coroapi.cede = api_cede; 1881 coroapi.cede = api_cede;
1882 coroapi.cede_notself = api_cede_notself;
1158 coroapi.ready = api_ready; 1883 coroapi.ready = api_ready;
1884 coroapi.is_ready = api_is_ready;
1159 coroapi.nready = &coro_nready; 1885 coroapi.nready = &coro_nready;
1160 coroapi.current = coro_current; 1886 coroapi.current = coro_current;
1161 1887
1162 GCoroAPI = &coroapi; 1888 GCoroAPI = &coroapi;
1163 sv_setiv (sv, (IV)&coroapi); 1889 sv_setiv (sv, (IV)&coroapi);
1164 SvREADONLY_on (sv); 1890 SvREADONLY_on (sv);
1165 } 1891 }
1166} 1892}
1893
1894void
1895_set_current (SV *current)
1896 PROTOTYPE: $
1897 CODE:
1898 SvREFCNT_dec (SvRV (coro_current));
1899 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1900
1901void
1902_set_readyhook (SV *hook)
1903 PROTOTYPE: $
1904 CODE:
1905 LOCK;
1906 SvREFCNT_dec (coro_readyhook);
1907 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1908 UNLOCK;
1167 1909
1168int 1910int
1169prio (Coro::State coro, int newprio = 0) 1911prio (Coro::State coro, int newprio = 0)
1170 ALIAS: 1912 ALIAS:
1171 nice = 1 1913 nice = 1
… …
1174 RETVAL = coro->prio; 1916 RETVAL = coro->prio;
1175 1917
1176 if (items > 1) 1918 if (items > 1)
1177 { 1919 {
1178 if (ix) 1920 if (ix)
1179 newprio += coro->prio; 1921 newprio = coro->prio - newprio;
1180 1922
1181 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 1923 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1182 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 1924 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1183 1925
1184 coro->prio = newprio; 1926 coro->prio = newprio;
1185 } 1927 }
1186} 1928}
1929 OUTPUT:
1930 RETVAL
1187 1931
1188void 1932SV *
1189ready (SV *self) 1933ready (SV *self)
1190 PROTOTYPE: $ 1934 PROTOTYPE: $
1191 CODE: 1935 CODE:
1192 api_ready (self); 1936 RETVAL = boolSV (api_ready (self));
1937 OUTPUT:
1938 RETVAL
1193 1939
1194int 1940int
1195nready (...) 1941nready (...)
1196 PROTOTYPE: 1942 PROTOTYPE:
1197 CODE: 1943 CODE:
1198 RETVAL = coro_nready; 1944 RETVAL = coro_nready;
1199 OUTPUT: 1945 OUTPUT:
1200 RETVAL 1946 RETVAL
1201 1947
1948void
1949throw (Coro::State self, SV *throw = &PL_sv_undef)
1950 PROTOTYPE: $;$
1951 CODE:
1952 SvREFCNT_dec (self->throw);
1953 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1954
1955void
1956swap_defsv (Coro::State self)
1957 PROTOTYPE: $
1958 ALIAS:
1959 swap_defav = 1
1960 CODE:
1961 if (!self->slot)
1962 croak ("cannot swap state with coroutine that has no saved state");
1963 else
1964 {
1965 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1966 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1967
1968 SV *tmp = *src; *src = *dst; *dst = tmp;
1969 }
1970
1971# for async_pool speedup
1972void
1973_pool_1 (SV *cb)
1974 CODE:
1975{
1976 struct coro *coro = SvSTATE (coro_current);
1977 HV *hv = (HV *)SvRV (coro_current);
1978 AV *defav = GvAV (PL_defgv);
1979 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1980 AV *invoke_av;
1981 int i, len;
1982
1983 if (!invoke)
1984 {
1985 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1986 croak ("\3async_pool terminate\2\n");
1987 }
1988
1989 SvREFCNT_dec (coro->saved_deffh);
1990 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1991
1992 hv_store (hv, "desc", sizeof ("desc") - 1,
1993 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1994
1995 invoke_av = (AV *)SvRV (invoke);
1996 len = av_len (invoke_av);
1997
1998 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1999
2000 if (len > 0)
2001 {
2002 av_fill (defav, len - 1);
2003 for (i = 0; i < len; ++i)
2004 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2005 }
2006
2007 SvREFCNT_dec (invoke);
2008}
2009
2010void
2011_pool_2 (SV *cb)
2012 CODE:
2013{
2014 struct coro *coro = SvSTATE (coro_current);
2015
2016 sv_setsv (cb, &PL_sv_undef);
2017
2018 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2019 coro->saved_deffh = 0;
2020
2021 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2022 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2023 {
2024 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
2025 croak ("\3async_pool terminate\2\n");
2026 }
2027
2028 av_clear (GvAV (PL_defgv));
2029 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2030 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2031
2032 coro->prio = 0;
2033
2034 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2035 api_trace (coro_current, 0);
2036
2037 av_push (av_async_pool, newSVsv (coro_current));
2038}
2039
2040
1202MODULE = Coro::State PACKAGE = Coro::AIO 2041MODULE = Coro::State PACKAGE = Coro::AIO
1203 2042
1204SV * 2043SV *
1205_get_state () 2044_get_state ()
1206 CODE: 2045 CODE:
1207{ 2046{
1208 struct { 2047 struct io_state *data;
1209 int errorno;
1210 int laststype;
1211 int laststatval;
1212 Stat_t statcache;
1213 } data;
1214 2048
2049 RETVAL = newSV (sizeof (struct io_state));
2050 data = (struct io_state *)SvPVX (RETVAL);
2051 SvCUR_set (RETVAL, sizeof (struct io_state));
2052 SvPOK_only (RETVAL);
2053
1215 data.errorno = errno; 2054 data->errorno = errno;
1216 data.laststype = PL_laststype; 2055 data->laststype = PL_laststype;
1217 data.laststatval = PL_laststatval; 2056 data->laststatval = PL_laststatval;
1218 data.statcache = PL_statcache; 2057 data->statcache = PL_statcache;
1219
1220 RETVAL = newSVpvn ((char *)&data, sizeof data);
1221} 2058}
1222 OUTPUT: 2059 OUTPUT:
1223 RETVAL 2060 RETVAL
1224 2061
1225void 2062void
1226_set_state (char *data_) 2063_set_state (char *data_)
1227 PROTOTYPE: $ 2064 PROTOTYPE: $
1228 CODE: 2065 CODE:
1229{ 2066{
1230 struct { 2067 struct io_state *data = (void *)data_;
1231 int errorno;
1232 int laststype;
1233 int laststatval;
1234 Stat_t statcache;
1235 } *data = (void *)data_;
1236 2068
1237 errno = data->errorno; 2069 errno = data->errorno;
1238 PL_laststype = data->laststype; 2070 PL_laststype = data->laststype;
1239 PL_laststatval = data->laststatval; 2071 PL_laststatval = data->laststatval;
1240 PL_statcache = data->statcache; 2072 PL_statcache = data->statcache;
1241} 2073}
2074
2075
2076MODULE = Coro::State PACKAGE = Coro::AnyEvent
2077
2078BOOT:
2079 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2080
2081SV *
2082_schedule ()
2083 PROTOTYPE: @
2084 CODE:
2085{
2086 static int incede;
2087
2088 api_cede_notself ();
2089
2090 ++incede;
2091 while (coro_nready >= incede && api_cede ())
2092 ;
2093
2094 sv_setsv (sv_activity, &PL_sv_undef);
2095 if (coro_nready >= incede)
2096 {
2097 PUSHMARK (SP);
2098 PUTBACK;
2099 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2100 SPAGAIN;
2101 }
2102
2103 --incede;
2104}
2105

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