ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.97 by root, Sun Nov 26 21:21:14 2006 UTC vs.
Revision 1.240 by root, Sun Jun 29 00:28:17 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; /* sp of top-level transfer/schedule/cede call */ 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; 204
205#if CORO_USE_VALGRIND
206 int valgrind_id;
207#endif
208 unsigned char flags;
209} coro_cctx;
210
211enum {
212 CF_RUNNING = 0x0001, /* coroutine is running */
213 CF_READY = 0x0002, /* coroutine is ready */
214 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216};
217
218/* the structure where most of the perl state is stored, overlaid on the cxstack */
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))
102 230
103/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
104struct coro { 232struct coro {
105 /* the c coroutine allocated to this perl coroutine, if any */ 233 /* the c coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 234 coro_cctx *cctx;
107 235
108 /* data associated with this coroutine (initial args) */ 236 /* process data */
109 AV *args;
110 int refcnt;
111
112 /* optionally saved, might be zero */
113 AV *defav;
114 SV *defsv;
115 SV *errsv;
116
117 /* saved global state not related to stacks */
118 U8 dowarn;
119 I32 in_eval;
120
121 /* the stacks and related info (callchain etc..) */
122 PERL_SI *curstackinfo;
123 AV *curstack;
124 AV *mainstack; 237 AV *mainstack;
125 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
126 OP *op; 239
127 SV **curpad; 240 AV *args; /* data associated with this coroutine (initial args) */
128 AV *comppad; 241 int refcnt; /* coroutines are refcounted, yes */
129 CV *compcv; 242 int flags; /* CF_ flags */
130 SV **stack_base; 243 HV *hv; /* the perl hash associated with this coro, if any */
131 SV **stack_max; 244
132 SV **tmps_stack; 245 /* statistics */
133 I32 tmps_floor; 246 int usecount; /* number of transfers to this coro */
134 I32 tmps_ix;
135 I32 tmps_max;
136 I32 *markstack;
137 I32 *markstack_ptr;
138 I32 *markstack_max;
139 I32 *scopestack;
140 I32 scopestack_ix;
141 I32 scopestack_max;
142 ANY *savestack;
143 I32 savestack_ix;
144 I32 savestack_max;
145 OP **retstack;
146 I32 retstack_ix;
147 I32 retstack_max;
148 PMOP *curpm;
149 COP *curcop;
150 247
151 /* coro process data */ 248 /* coro process data */
152 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;
153}; 257};
154 258
155typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
157 261
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
158static AV * 310static AV *
159coro_clone_padlist (pTHX_ CV *cv) 311coro_clone_padlist (pTHX_ CV *cv)
160{ 312{
161 AV *padlist = CvPADLIST (cv); 313 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 314 AV *newpadlist, *newpad;
163 315
164 newpadlist = newAV (); 316 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 318#if PERL_VERSION_ATLEAST (5,10,0)
319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
320#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 322#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 324 --AvFILLp (padlist);
173 325
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
… …
209 361
210 /* casting is fun. */ 362 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 364 free_padlist (aTHX_ padlist);
213 365
214 SvREFCNT_dec (av);
215
216 return 0; 366 return 0;
217} 367}
218 368
219#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
220 371
221static 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))
222 412
223/* the next two functions merely cache the padlists */ 413/* the next two functions merely cache the padlists */
224static void 414static void
225get_padlist (pTHX_ CV *cv) 415get_padlist (pTHX_ CV *cv)
226{ 416{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 417 MAGIC *mg = CORO_MAGIC_cv (cv);
418 AV *av;
228 419
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 422 else
232 { 423 {
233#if 0 424#if CORO_PREFER_PERL_FUNCTIONS
234 /* this is probably cleaner, but also slower? */ 425 /* this is probably cleaner, but also slower? */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 426 CV *cp = Perl_cv_clone (cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 427 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 428 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 429 SvREFCNT_dec (cp);
239#else 430#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
243} 434}
244 435
245static void 436static void
246put_padlist (pTHX_ CV *cv) 437put_padlist (pTHX_ CV *cv)
247{ 438{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 439 MAGIC *mg = CORO_MAGIC_cv (cv);
440 AV *av;
249 441
250 if (!mg) 442 if (expect_false (!mg))
251 { 443 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254 mg->mg_virtual = &vtbl_coro;
255 mg->mg_obj = (SV *)newAV ();
256 }
257 444
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 445 av = (AV *)mg->mg_obj;
259}
260 446
261#define SB do { 447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 448 av_extend (av, AvMAX (av) + 1);
263 449
264#define LOAD(state) load_state(aTHX_ (state)); 450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 451}
266 452
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 453/** load & save, init *******************************************************/
268 454
269static void 455static void
270load_state(pTHX_ Coro__State c) 456load_perl (pTHX_ Coro__State c)
271{ 457{
272 PL_dowarn = c->dowarn; 458 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 459 c->slot = 0;
274 460
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 461 PL_mainstack = c->mainstack;
278 PL_stack_sp = c->stack_sp;
279 PL_op = c->op;
280 PL_curpad = c->curpad;
281 PL_comppad = c->comppad;
282 PL_compcv = c->compcv;
283 PL_stack_base = c->stack_base;
284 PL_stack_max = c->stack_max;
285 PL_tmps_stack = c->tmps_stack;
286 PL_tmps_floor = c->tmps_floor;
287 PL_tmps_ix = c->tmps_ix;
288 PL_tmps_max = c->tmps_max;
289 PL_markstack = c->markstack;
290 PL_markstack_ptr = c->markstack_ptr;
291 PL_markstack_max = c->markstack_max;
292 PL_scopestack = c->scopestack;
293 PL_scopestack_ix = c->scopestack_ix;
294 PL_scopestack_max = c->scopestack_max;
295 PL_savestack = c->savestack;
296 PL_savestack_ix = c->savestack_ix;
297 PL_savestack_max = c->savestack_max;
298#if PERL_VERSION < 9
299 PL_retstack = c->retstack;
300 PL_retstack_ix = c->retstack_ix;
301 PL_retstack_max = c->retstack_max;
302#endif
303 PL_curpm = c->curpm;
304 PL_curcop = c->curcop;
305 462
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 463 GvSV (PL_defgv) = slot->defsv;
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 464 GvAV (PL_defgv) = slot->defav;
308 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 465 GvSV (PL_errgv) = slot->errsv;
466 GvSV (irsgv) = slot->irsgv;
467
468 #define VAR(name,type) PL_ ## name = slot->name;
469 # include "state.h"
470 #undef VAR
309 471
310 { 472 {
311 dSP; 473 dSP;
474
312 CV *cv; 475 CV *cv;
313 476
314 /* now do the ugly restore mess */ 477 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs)) 478 while (expect_true (cv = (CV *)POPs))
316 { 479 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */ 480 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist; 481 CvDEPTH (cv) = PTR2IV (POPs);
323 } 482 CvPADLIST (cv) = (AV *)POPs;
324
325 ++CvDEPTH(cv);
326 } 483 }
327 484
328 PUTBACK; 485 PUTBACK;
329 } 486 }
330} 487}
331 488
332static void 489static void
333save_state(pTHX_ Coro__State c, int flags) 490save_perl (pTHX_ Coro__State c)
334{ 491{
335 { 492 {
336 dSP; 493 dSP;
337 I32 cxix = cxstack_ix; 494 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack; 495 PERL_CONTEXT *ccstk = cxstack;
… …
341 /* 498 /*
342 * the worst thing you can imagine happens first - we have to save 499 * the worst thing you can imagine happens first - we have to save
343 * (and reinitialize) all cv's in the whole callchain :( 500 * (and reinitialize) all cv's in the whole callchain :(
344 */ 501 */
345 502
346 PUSHs (Nullsv); 503 XPUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */ 504 /* this loop was inspired by pp_caller */
348 for (;;) 505 for (;;)
349 { 506 {
350 while (cxix >= 0) 507 while (expect_true (cxix >= 0))
351 { 508 {
352 PERL_CONTEXT *cx = &ccstk[cxix--]; 509 PERL_CONTEXT *cx = &ccstk[cxix--];
353 510
354 if (CxTYPE(cx) == CXt_SUB) 511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355 { 512 {
356 CV *cv = cx->blk_sub.cv; 513 CV *cv = cx->blk_sub.cv;
514
357 if (CvDEPTH(cv)) 515 if (expect_true (CvDEPTH (cv)))
358 { 516 {
359 EXTEND (SP, CvDEPTH(cv)*2); 517 EXTEND (SP, 3);
360
361 while (--CvDEPTH(cv))
362 {
363 /* this tells the restore code to increment CvDEPTH */
364 PUSHs (Nullsv);
365 PUSHs ((SV *)cv);
366 }
367
368 PUSHs ((SV *)CvPADLIST(cv)); 518 PUSHs ((SV *)CvPADLIST (cv));
519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
369 PUSHs ((SV *)cv); 520 PUSHs ((SV *)cv);
370 521
522 CvDEPTH (cv) = 0;
371 get_padlist (aTHX_ cv); 523 get_padlist (aTHX_ cv);
372 } 524 }
373 } 525 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE(cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 526 }
383 527
384 if (top_si->si_type == PERLSI_MAIN) 528 if (expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 529 break;
386 530
387 top_si = top_si->si_prev; 531 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 532 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 533 cxix = top_si->si_cxix;
390 } 534 }
391 535
392 PUTBACK; 536 PUTBACK;
393 } 537 }
394 538
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 539 /* allocate some space on the context stack for our purposes */
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 540 /* we manually unroll here, as usually 2 slots is enough */
397 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 541 if (SLOT_COUNT >= 1) CXINC;
542 if (SLOT_COUNT >= 2) CXINC;
543 if (SLOT_COUNT >= 3) CXINC;
544 {
545 int i;
546 for (i = 3; i < SLOT_COUNT; ++i)
547 CXINC;
548 }
549 cxstack_ix -= SLOT_COUNT; /* undo allocation */
398 550
399 c->dowarn = PL_dowarn;
400 c->in_eval = PL_in_eval;
401
402 c->curstackinfo = PL_curstackinfo;
403 c->curstack = PL_curstack;
404 c->mainstack = PL_mainstack; 551 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp; 552
406 c->op = PL_op; 553 {
407 c->curpad = PL_curpad; 554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408 c->comppad = PL_comppad; 555
409 c->compcv = PL_compcv; 556 slot->defav = GvAV (PL_defgv);
410 c->stack_base = PL_stack_base; 557 slot->defsv = DEFSV;
411 c->stack_max = PL_stack_max; 558 slot->errsv = ERRSV;
412 c->tmps_stack = PL_tmps_stack; 559 slot->irsgv = GvSV (irsgv);
413 c->tmps_floor = PL_tmps_floor; 560
414 c->tmps_ix = PL_tmps_ix; 561 #define VAR(name,type) slot->name = PL_ ## name;
415 c->tmps_max = PL_tmps_max; 562 # include "state.h"
416 c->markstack = PL_markstack; 563 #undef VAR
417 c->markstack_ptr = PL_markstack_ptr; 564 }
418 c->markstack_max = PL_markstack_max;
419 c->scopestack = PL_scopestack;
420 c->scopestack_ix = PL_scopestack_ix;
421 c->scopestack_max = PL_scopestack_max;
422 c->savestack = PL_savestack;
423 c->savestack_ix = PL_savestack_ix;
424 c->savestack_max = PL_savestack_max;
425#if PERL_VERSION < 9
426 c->retstack = PL_retstack;
427 c->retstack_ix = PL_retstack_ix;
428 c->retstack_max = PL_retstack_max;
429#endif
430 c->curpm = PL_curpm;
431 c->curcop = PL_curcop;
432} 565}
433 566
434/* 567/*
435 * allocate various perl stacks. This is an exact copy 568 * allocate various perl stacks. This is an exact copy
436 * of perl.c:init_stacks, except that it uses less memory 569 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do 570 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace. 571 * not usually need a lot of stackspace.
439 */ 572 */
573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
440static void 576static void
441coro_init_stacks (pTHX) 577coro_init_stacks (pTHX)
442{ 578{
443 LOCK; 579 PL_curstackinfo = new_stackinfo(32, 8);
444
445 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446 PL_curstackinfo->si_type = PERLSI_MAIN; 580 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 581 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 583
450 PL_stack_base = AvARRAY(PL_curstack); 584 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 585 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 587
454 New(50,PL_tmps_stack,96,SV*); 588 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 589 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 590 PL_tmps_ix = -1;
457 PL_tmps_max = 96; 591 PL_tmps_max = 32;
458 592
459 New(54,PL_markstack,16,I32); 593 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 594 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16; 595 PL_markstack_max = PL_markstack + 16;
462 596
463#ifdef SET_MARK_OFFSET 597#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 598 SET_MARK_OFFSET;
465#endif 599#endif
466 600
467 New(54,PL_scopestack,16,I32); 601 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 602 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16; 603 PL_scopestack_max = 8;
470 604
471 New(54,PL_savestack,96,ANY); 605 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 606 PL_savestack_ix = 0;
473 PL_savestack_max = 96; 607 PL_savestack_max = 24;
474 608
475#if PERL_VERSION < 9 609#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,8,OP*); 610 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 611 PL_retstack_ix = 0;
478 PL_retstack_max = 8; 612 PL_retstack_max = 4;
479#endif 613#endif
480
481 UNLOCK;
482} 614}
615#endif
483 616
484/* 617/*
485 * destroy the stacks, the callchain etc... 618 * destroy the stacks, the callchain etc...
486 */ 619 */
487static void 620static void
488destroy_stacks(pTHX) 621coro_destroy_stacks (pTHX)
489{ 622{
490 if (!IN_DESTRUCT)
491 {
492 /* is this ugly, I ask? */
493 LEAVE_SCOPE (0);
494
495 /* sure it is, but more important: is it correct?? :/ */
496 FREETMPS;
497
498 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499 }
500
501 while (PL_curstackinfo->si_next) 623 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 624 PL_curstackinfo = PL_curstackinfo->si_next;
503 625
504 while (PL_curstackinfo) 626 while (PL_curstackinfo)
505 { 627 {
506 PERL_SI *p = PL_curstackinfo->si_prev; 628 PERL_SI *p = PL_curstackinfo->si_prev;
507 629
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT) 630 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack); 631 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519 632
520 Safefree (PL_curstackinfo->si_cxstack); 633 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo); 634 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p; 635 PL_curstackinfo = p;
523 } 636 }
524 637
525 Safefree (PL_tmps_stack); 638 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 639 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 640 Safefree (PL_scopestack);
528 Safefree (PL_savestack); 641 Safefree (PL_savestack);
529#if PERL_VERSION < 9 642#if !PERL_VERSION_ATLEAST (5,10,0)
530 Safefree (PL_retstack); 643 Safefree (PL_retstack);
531#endif 644#endif
532} 645}
533 646
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);
688static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
689
690/* apparently < 5.8.8 */
691#undef MgPV_nolen_const
692#ifndef MgPV_nolen_const
693#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
694 SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \
695 (const char*)(mg)->mg_ptr)
696#endif
697
698/*
699 * This overrides the default magic get method of %SIG elements.
700 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
701 * and instead of tryign to save and restore the hash elements, we just provide
702 * readback here.
703 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
704 * not expecting this to actually change the hook. This is a potential problem
705 * when a schedule happens then, but we ignore this.
706 */
707static int
708coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
709{
710 const char *s = MgPV_nolen_const (mg);
711
712 if (*s == '_')
713 {
714 SV **svp = 0;
715
716 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
717 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
718
719 if (svp)
720 {
721 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
722 return 0;
723 }
724 }
725
726 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
727}
728
729static int
730coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
731{
732 const char *s = MgPV_nolen_const (mg);
733
734 if (*s == '_')
735 {
736 SV **svp = 0;
737
738 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
739 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
740
741 if (svp)
742 {
743 SV *old = *svp;
744 *svp = 0;
745 SvREFCNT_dec (old);
746 return 0;
747 }
748 }
749
750 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
751}
752
753static int
754coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
755{
756 const char *s = MgPV_nolen_const (mg);
757
758 if (*s == '_')
759 {
760 SV **svp = 0;
761
762 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
763 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
764
765 if (svp)
766 {
767 SV *old = *svp;
768 *svp = newSVsv (sv);
769 SvREFCNT_dec (old);
770 return 0;
771 }
772 }
773
774 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
775}
776
534static void 777static void
535setup_coro (struct coro *coro) 778coro_setup (pTHX_ struct coro *coro)
536{ 779{
537 /* 780 /*
538 * emulate part of the perl startup here. 781 * emulate part of the perl startup here.
539 */ 782 */
540 dTHX; 783 coro_init_stacks (aTHX);
784
785 PL_runops = RUNOPS_DEFAULT;
786 PL_curcop = &PL_compiling;
787 PL_in_eval = EVAL_NULL;
788 PL_comppad = 0;
789 PL_curpm = 0;
790 PL_curpad = 0;
791 PL_localizing = 0;
792 PL_dirty = 0;
793 PL_restartop = 0;
794#if PERL_VERSION_ATLEAST (5,10,0)
795 PL_parser = 0;
796#endif
797
798 /* recreate the die/warn hooks */
799 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
800 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
801
802 GvSV (PL_defgv) = newSV (0);
803 GvAV (PL_defgv) = coro->args; coro->args = 0;
804 GvSV (PL_errgv) = newSV (0);
805 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
806 PL_rs = newSVsv (GvSV (irsgv));
807 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
808
809 {
810 dSP;
811 LOGOP myop;
812
813 Zero (&myop, 1, LOGOP);
814 myop.op_next = Nullop;
815 myop.op_flags = OPf_WANT_VOID;
816
817 PUSHMARK (SP);
818 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
819 PUTBACK;
820 PL_op = (OP *)&myop;
821 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
822 SPAGAIN;
823 }
824
825 /* this newly created coroutine might be run on an existing cctx which most
826 * likely was suspended in set_stacklevel, called from entersub.
827 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
828 * so we ENTER here for symmetry
829 */
830 ENTER;
831}
832
833static void
834coro_destroy (pTHX_ struct coro *coro)
835{
836 if (!IN_DESTRUCT)
837 {
838 /* restore all saved variables and stuff */
839 LEAVE_SCOPE (0);
840 assert (PL_tmps_floor == -1);
841
842 /* free all temporaries */
843 FREETMPS;
844 assert (PL_tmps_ix == -1);
845
846 /* unwind all extra stacks */
847 POPSTACK_TO (PL_mainstack);
848
849 /* unwind main stack */
850 dounwind (-1);
851 }
852
853 SvREFCNT_dec (GvSV (PL_defgv));
854 SvREFCNT_dec (GvAV (PL_defgv));
855 SvREFCNT_dec (GvSV (PL_errgv));
856 SvREFCNT_dec (PL_defoutgv);
857 SvREFCNT_dec (PL_rs);
858 SvREFCNT_dec (GvSV (irsgv));
859
860 SvREFCNT_dec (PL_diehook);
861 SvREFCNT_dec (PL_warnhook);
862
863 SvREFCNT_dec (coro->saved_deffh);
864 SvREFCNT_dec (coro->throw);
865
866 coro_destroy_stacks (aTHX);
867}
868
869static void
870free_coro_mortal (pTHX)
871{
872 if (expect_true (coro_mortal))
873 {
874 SvREFCNT_dec (coro_mortal);
875 coro_mortal = 0;
876 }
877}
878
879static int
880runops_trace (pTHX)
881{
882 COP *oldcop = 0;
883 int oldcxix = -2;
884 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
885 coro_cctx *cctx = coro->cctx;
886
887 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
888 {
889 PERL_ASYNC_CHECK ();
890
891 if (cctx->flags & CC_TRACE_ALL)
892 {
893 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
894 {
895 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
896 SV **bot, **top;
897 AV *av = newAV (); /* return values */
898 SV **cb;
899 dSP;
900
901 GV *gv = CvGV (cx->blk_sub.cv);
902 SV *fullname = sv_2mortal (newSV (0));
903 if (isGV (gv))
904 gv_efullname3 (fullname, gv, 0);
905
906 bot = PL_stack_base + cx->blk_oldsp + 1;
907 top = cx->blk_gimme == G_ARRAY ? SP + 1
908 : cx->blk_gimme == G_SCALAR ? bot + 1
909 : bot;
910
911 av_extend (av, top - bot);
912 while (bot < top)
913 av_push (av, SvREFCNT_inc (*bot++));
914
915 PL_runops = RUNOPS_DEFAULT;
916 ENTER;
917 SAVETMPS;
918 EXTEND (SP, 3);
919 PUSHMARK (SP);
920 PUSHs (&PL_sv_no);
921 PUSHs (fullname);
922 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
923 PUTBACK;
924 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
925 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
926 SPAGAIN;
927 FREETMPS;
928 LEAVE;
929 PL_runops = runops_trace;
930 }
931
932 if (oldcop != PL_curcop)
933 {
934 oldcop = PL_curcop;
935
936 if (PL_curcop != &PL_compiling)
937 {
938 SV **cb;
939
940 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
941 {
942 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
943
944 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
945 {
946 runops_proc_t old_runops = PL_runops;
947 dSP;
948 GV *gv = CvGV (cx->blk_sub.cv);
949 SV *fullname = sv_2mortal (newSV (0));
950
951 if (isGV (gv))
952 gv_efullname3 (fullname, gv, 0);
953
954 PL_runops = RUNOPS_DEFAULT;
955 ENTER;
956 SAVETMPS;
957 EXTEND (SP, 3);
958 PUSHMARK (SP);
959 PUSHs (&PL_sv_yes);
960 PUSHs (fullname);
961 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
962 PUTBACK;
963 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
964 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
965 SPAGAIN;
966 FREETMPS;
967 LEAVE;
968 PL_runops = runops_trace;
969 }
970
971 oldcxix = cxstack_ix;
972 }
973
974 if (cctx->flags & CC_TRACE_LINE)
975 {
976 dSP;
977
978 PL_runops = RUNOPS_DEFAULT;
979 ENTER;
980 SAVETMPS;
981 EXTEND (SP, 3);
982 PL_runops = RUNOPS_DEFAULT;
983 PUSHMARK (SP);
984 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
985 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
986 PUTBACK;
987 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
988 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
989 SPAGAIN;
990 FREETMPS;
991 LEAVE;
992 PL_runops = runops_trace;
993 }
994 }
995 }
996 }
997 }
998
999 TAINT_NOT;
1000 return 0;
1001}
1002
1003/* inject a fake call to Coro::State::_cctx_init into the execution */
1004/* _cctx_init should be careful, as it could be called at almost any time */
1005/* during execution of a perl program */
1006static void NOINLINE
1007cctx_prepare (pTHX_ coro_cctx *cctx)
1008{
541 dSP; 1009 dSP;
542 UNOP myop; 1010 LOGOP myop;
543 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544 1011
545 coro_init_stacks (aTHX); 1012 PL_top_env = &PL_start_env;
546 /*PL_curcop = 0;*/
547 /*PL_in_eval = PL_in_eval;*/ /* inherit */
548 SvREFCNT_dec (GvAV (PL_defgv));
549 GvAV (PL_defgv) = coro->args; coro->args = 0;
550 1013
551 SPAGAIN; 1014 if (cctx->flags & CC_TRACE)
1015 PL_runops = runops_trace;
552 1016
553 Zero (&myop, 1, UNOP); 1017 Zero (&myop, 1, LOGOP);
554 myop.op_next = Nullop; 1018 myop.op_next = PL_op;
555 myop.op_flags = OPf_WANT_VOID; 1019 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556 1020
1021 PUSHMARK (SP);
1022 EXTEND (SP, 2);
1023 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1024 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1025 PUTBACK;
557 PL_op = (OP *)&myop; 1026 PL_op = (OP *)&myop;
558
559 PUSHMARK(SP);
560 XPUSHs (sub_init);
561 PUTBACK;
562 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1027 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563 SPAGAIN; 1028 SPAGAIN;
564
565 ENTER; /* necessary e.g. for dounwind */
566} 1029}
567 1030
1031/*
1032 * this is a _very_ stripped down perl interpreter ;)
1033 */
568static void 1034static void
569free_coro_mortal () 1035cctx_run (void *arg)
570{ 1036{
571 if (coro_mortal)
572 {
573 dTHX; 1037 dTHX;
574 1038
575 SvREFCNT_dec (coro_mortal); 1039 /* cctx_run is the alternative tail of transfer(), so unlock here. */
576 coro_mortal = 0; 1040 UNLOCK;
1041
1042 /* we now skip the entersub that lead to transfer() */
1043 PL_op = PL_op->op_next;
1044
1045 /* inject a fake subroutine call to cctx_init */
1046 cctx_prepare (aTHX_ (coro_cctx *)arg);
1047
1048 /* somebody or something will hit me for both perl_run and PL_restartop */
1049 PL_restartop = PL_op;
1050 perl_run (PL_curinterp);
1051
1052 /*
1053 * If perl-run returns we assume exit() was being called or the coro
1054 * fell off the end, which seems to be the only valid (non-bug)
1055 * reason for perl_run to return. We try to exit by jumping to the
1056 * bootstrap-time "top" top_env, as we cannot restore the "main"
1057 * coroutine as Coro has no such concept
1058 */
1059 PL_top_env = main_top_env;
1060 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1061}
1062
1063static coro_cctx *
1064cctx_new ()
1065{
1066 coro_cctx *cctx;
1067 void *stack_start;
1068 size_t stack_size;
1069
1070 ++cctx_count;
1071
1072 Newz (0, cctx, 1, coro_cctx);
1073
1074#if HAVE_MMAP
1075 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1076 /* mmap supposedly does allocate-on-write for us */
1077 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1078
1079 if (cctx->sptr != (void *)-1)
577 } 1080 {
1081# if CORO_STACKGUARD
1082 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1083# endif
1084 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1085 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1086 cctx->flags |= CC_MAPPED;
1087 }
1088 else
1089#endif
1090 {
1091 cctx->ssize = coro_stacksize * (long)sizeof (long);
1092 New (0, cctx->sptr, coro_stacksize, long);
1093
1094 if (!cctx->sptr)
1095 {
1096 perror ("FATAL: unable to allocate stack for coroutine");
1097 _exit (EXIT_FAILURE);
1098 }
1099
1100 stack_start = cctx->sptr;
1101 stack_size = cctx->ssize;
1102 }
1103
1104 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1105 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1106
1107 return cctx;
578} 1108}
579 1109
580static void 1110static void
581coro_run (void *arg) 1111cctx_destroy (coro_cctx *cctx)
582{ 1112{
583 /* 1113 if (!cctx)
584 * this is a _very_ stripped down perl interpreter ;) 1114 return;
585 */
586 dTHX;
587 int ret;
588 1115
589 UNLOCK; 1116 --cctx_count;
590 1117
591 PL_top_env = &PL_start_env; 1118#if CORO_USE_VALGRIND
592 1119 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
593 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1120#endif
594 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595
596 /* continue at cctx_init, without entersub */
597 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
598
599 /* somebody will hit me for both perl_run and PL_restartop */
600 ret = perl_run (aTHX_ PERL_GET_CONTEXT);
601 printf ("ret %d\n", ret);//D
602
603 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
604 abort ();
605}
606
607static coro_stack *
608stack_new ()
609{
610 coro_stack *stack;
611
612 New (0, stack, 1, coro_stack);
613 1121
614#if HAVE_MMAP 1122#if HAVE_MMAP
615 1123 if (cctx->flags & CC_MAPPED)
616 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1124 munmap (cctx->sptr, cctx->ssize);
617 /* mmap suppsedly does allocate-on-write for us */ 1125 else
618 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
619
620 if (stack->sptr == (void *)-1)
621 {
622 perror ("FATAL: unable to mmap stack for coroutine");
623 _exit (EXIT_FAILURE);
624 }
625
626# if STACKGUARD
627 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
628# endif 1126#endif
1127 Safefree (cctx->sptr);
629 1128
630#else 1129 Safefree (cctx);
1130}
631 1131
632 stack->ssize = STACKSIZE * (long)sizeof (long); 1132/* wether this cctx should be destructed */
633 New (0, stack->sptr, STACKSIZE, long); 1133#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
634 1134
635 if (!stack->sptr) 1135static coro_cctx *
636 { 1136cctx_get (pTHX)
637 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1137{
638 _exit (EXIT_FAILURE); 1138 while (expect_true (cctx_first))
639 } 1139 {
1140 coro_cctx *cctx = cctx_first;
1141 cctx_first = cctx->next;
1142 --cctx_idle;
640 1143
641#endif 1144 if (expect_true (!CCTX_EXPIRED (cctx)))
1145 return cctx;
642 1146
643 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1147 cctx_destroy (cctx);
1148 }
644 1149
645 return stack; 1150 return cctx_new ();
646} 1151}
647 1152
648static void 1153static void
649stack_free (coro_stack *stack) 1154cctx_put (coro_cctx *cctx)
650{ 1155{
651 if (!stack) 1156 /* free another cctx if overlimit */
652 return; 1157 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
653
654#if HAVE_MMAP
655 munmap (stack->sptr, stack->ssize);
656#else
657 Safefree (stack->sptr);
658#endif
659
660 Safefree (stack);
661}
662
663static coro_stack *stack_first;
664
665static coro_stack *
666stack_get ()
667{
668 coro_stack *stack;
669
670 if (stack_first)
671 {
672 stack = stack_first;
673 stack_first = stack->next;
674 }
675 else
676 { 1158 {
677 stack = stack_new (); 1159 coro_cctx *first = cctx_first;
678 PL_op = PL_op->op_next; 1160 cctx_first = first->next;
1161 --cctx_idle;
1162
1163 cctx_destroy (first);
679 } 1164 }
680 1165
681 return stack; 1166 ++cctx_idle;
1167 cctx->next = cctx_first;
1168 cctx_first = cctx;
682} 1169}
1170
1171/** coroutine switching *****************************************************/
683 1172
684static void 1173static void
685stack_put (coro_stack *stack) 1174transfer_check (pTHX_ struct coro *prev, struct coro *next)
686{ 1175{
687 stack->next = stack_first; 1176 if (expect_true (prev != next))
688 stack_first = stack; 1177 {
689} 1178 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1179 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
690 1180
691/* never call directly, always through the coro_state_transfer global variable */ 1181 if (expect_false (next->flags & CF_RUNNING))
692static void 1182 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1183
1184 if (expect_false (next->flags & CF_DESTROYED))
1185 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1186
1187#if !PERL_VERSION_ATLEAST (5,10,0)
1188 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1189 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1190#endif
1191 }
1192}
1193
1194/* always use the TRANSFER macro */
1195static void NOINLINE
693transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1196transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
694{ 1197{
695 dSTACKLEVEL; 1198 dSTACKLEVEL;
1199 static volatile int has_throw;
696 1200
697 /* sometimes transfer is only called to set idle_sp */ 1201 /* sometimes transfer is only called to set idle_sp */
698 if (flags == TRANSFER_SET_STACKLEVEL) 1202 if (expect_false (!next))
1203 {
699 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1204 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
700 else if (prev != next) 1205 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
701 { 1206 }
1207 else if (expect_true (prev != next))
1208 {
702 coro_stack *prev__stack; 1209 coro_cctx *prev__cctx;
1210
1211 if (expect_false (prev->flags & CF_NEW))
1212 {
1213 /* create a new empty context */
1214 Newz (0, prev->cctx, 1, coro_cctx);
1215 prev->flags &= ~CF_NEW;
1216 prev->flags |= CF_RUNNING;
1217 }
1218
1219 prev->flags &= ~CF_RUNNING;
1220 next->flags |= CF_RUNNING;
703 1221
704 LOCK; 1222 LOCK;
705 1223
706 if (next->mainstack) 1224 /* first get rid of the old state */
1225 save_perl (aTHX_ prev);
1226
1227 if (expect_false (next->flags & CF_NEW))
707 { 1228 {
708 /* coroutine already started */ 1229 /* need to start coroutine */
709 SAVE (prev, flags); 1230 next->flags &= ~CF_NEW;
710 LOAD (next); 1231 /* setup coroutine call */
1232 coro_setup (aTHX_ next);
711 } 1233 }
712 else 1234 else
1235 load_perl (aTHX_ next);
1236
1237 prev__cctx = prev->cctx;
1238
1239 /* possibly "free" the cctx */
1240 if (expect_true (
1241 prev__cctx->idle_sp == STACKLEVEL
1242 && !(prev__cctx->flags & CC_TRACE)
1243 && !force_cctx
1244 ))
713 { 1245 {
714 /* need to start coroutine */ 1246 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
715 /* first get rid of the old state */ 1247 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
716 SAVE (prev, -1); 1248
717 /* setup coroutine call */ 1249 prev->cctx = 0;
718 setup_coro (next); 1250
719 /* need a stack */ 1251 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
720 next->stack = 0; 1252 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1253 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1254 if (!next->cctx)
1255 next->cctx = cctx_get (aTHX);
1256
1257 cctx_put (prev__cctx);
721 } 1258 }
722 1259
723 if (!prev->stack) 1260 ++next->usecount;
724 /* create a new empty context */
725 Newz (0, prev->stack, 1, coro_stack);
726 1261
727 prev__stack = prev->stack; 1262 if (expect_true (!next->cctx))
1263 next->cctx = cctx_get (aTHX);
728 1264
729 /* possibly "free" the stack */ 1265 has_throw = !!next->throw;
730 if (prev__stack->idle_sp == STACKLEVEL) 1266
1267 if (expect_false (prev__cctx != next->cctx))
731 { 1268 {
732 stack_put (prev__stack); 1269 prev__cctx->top_env = PL_top_env;
733 prev->stack = 0; 1270 PL_top_env = next->cctx->top_env;
1271 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
734 } 1272 }
735 1273
736 if (!next->stack) 1274 free_coro_mortal (aTHX);
737 next->stack = stack_get (); 1275 UNLOCK;
738 1276
739 if (prev__stack != next->stack) 1277 if (expect_false (has_throw))
740 { 1278 {
741 prev__stack->top_env = PL_top_env; 1279 struct coro *coro = SvSTATE (coro_current);
742 PL_top_env = next->stack->top_env; 1280
743 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1281 if (coro->throw)
1282 {
1283 SV *exception = coro->throw;
1284 coro->throw = 0;
1285 sv_setsv (ERRSV, exception);
1286 croak (0);
1287 }
744 } 1288 }
1289 }
1290}
745 1291
746 free_coro_mortal (); 1292struct transfer_args
1293{
1294 struct coro *prev, *next;
1295};
747 1296
1297#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1298#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1299
1300/** high level stuff ********************************************************/
1301
1302static int
1303coro_state_destroy (pTHX_ struct coro *coro)
1304{
1305 if (coro->flags & CF_DESTROYED)
1306 return 0;
1307
1308 coro->flags |= CF_DESTROYED;
1309
1310 if (coro->flags & CF_READY)
1311 {
1312 /* reduce nready, as destroying a ready coro effectively unreadies it */
1313 /* alternative: look through all ready queues and remove the coro */
1314 LOCK;
1315 --coro_nready;
748 UNLOCK; 1316 UNLOCK;
749 } 1317 }
750} 1318 else
751 1319 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
752/* use this function pointer to call the above function */
753/* this is done to increase chances of the compiler not inlining the call */
754/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
755void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
756
757struct transfer_args
758{
759 struct coro *prev, *next;
760 int flags;
761};
762
763#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
764
765static void
766coro_state_destroy (struct coro *coro)
767{
768 if (coro->refcnt--)
769 return;
770 1320
771 if (coro->mainstack && coro->mainstack != main_mainstack) 1321 if (coro->mainstack && coro->mainstack != main_mainstack)
772 { 1322 {
773 struct coro temp; 1323 struct coro temp;
774 1324
775 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1325 if (coro->flags & CF_RUNNING)
1326 croak ("FATAL: tried to destroy currently running coroutine");
1327
1328 save_perl (aTHX_ &temp);
776 LOAD (aTHX_ coro); 1329 load_perl (aTHX_ coro);
777 1330
778 destroy_stacks (aTHX); 1331 coro_destroy (aTHX_ coro);
779 1332
780 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1333 load_perl (aTHX_ &temp);
781 1334
782 coro->mainstack = 0; 1335 coro->slot = 0;
783 } 1336 }
784 1337
785 stack_free (coro->stack); 1338 cctx_destroy (coro->cctx);
786 SvREFCNT_dec (coro->args); 1339 SvREFCNT_dec (coro->args);
787 Safefree (coro); 1340
1341 if (coro->next) coro->next->prev = coro->prev;
1342 if (coro->prev) coro->prev->next = coro->next;
1343 if (coro == coro_first) coro_first = coro->next;
1344
1345 return 1;
788} 1346}
789 1347
790static int 1348static int
791coro_state_clear (SV *sv, MAGIC *mg) 1349coro_state_free (pTHX_ SV *sv, MAGIC *mg)
792{ 1350{
793 struct coro *coro = (struct coro *)mg->mg_ptr; 1351 struct coro *coro = (struct coro *)mg->mg_ptr;
794 mg->mg_ptr = 0; 1352 mg->mg_ptr = 0;
795 1353
1354 coro->hv = 0;
1355
1356 if (--coro->refcnt < 0)
1357 {
796 coro_state_destroy (coro); 1358 coro_state_destroy (aTHX_ coro);
1359 Safefree (coro);
1360 }
797 1361
798 return 0; 1362 return 0;
799} 1363}
800 1364
801static int 1365static int
802coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1366coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
803{ 1367{
804 struct coro *coro = (struct coro *)mg->mg_ptr; 1368 struct coro *coro = (struct coro *)mg->mg_ptr;
805 1369
806 ++coro->refcnt; 1370 ++coro->refcnt;
807 1371
808 return 0; 1372 return 0;
809} 1373}
810 1374
811static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1375static MGVTBL coro_state_vtbl = {
812 1376 0, 0, 0, 0,
813static struct coro * 1377 coro_state_free,
814SvSTATE (SV *coro) 1378 0,
815{ 1379#ifdef MGf_DUP
816 HV *stash; 1380 coro_state_dup,
817 MAGIC *mg; 1381#else
818 1382# define MGf_DUP 0
819 if (SvROK (coro)) 1383#endif
820 coro = SvRV (coro); 1384};
821
822 stash = SvSTASH (coro);
823 if (stash != coro_stash && stash != coro_state_stash)
824 {
825 /* very slow, but rare, check */
826 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
827 croak ("Coro::State object required");
828 }
829
830 mg = SvMAGIC (coro);
831 assert (mg->mg_type == PERL_MAGIC_ext);
832 return (struct coro *)mg->mg_ptr;
833}
834 1385
835static void 1386static void
836prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags) 1387prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
837{ 1388{
838 ta->prev = SvSTATE (prev); 1389 ta->prev = SvSTATE (prev_sv);
839 ta->next = SvSTATE (next); 1390 ta->next = SvSTATE (next_sv);
840 ta->flags = flags; 1391 TRANSFER_CHECK (*ta);
841} 1392}
842 1393
843static void 1394static void
844api_transfer (SV *prev, SV *next, int flags) 1395api_transfer (SV *prev_sv, SV *next_sv)
845{ 1396{
846 dTHX; 1397 dTHX;
847 struct transfer_args ta; 1398 struct transfer_args ta;
848 1399
849 prepare_transfer (aTHX_ &ta, prev, next, flags); 1400 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
850 TRANSFER (ta); 1401 TRANSFER (ta, 1);
851} 1402}
852 1403
853/** Coro ********************************************************************/ 1404/** Coro ********************************************************************/
854 1405
855#define PRIO_MAX 3
856#define PRIO_HIGH 1
857#define PRIO_NORMAL 0
858#define PRIO_LOW -1
859#define PRIO_IDLE -3
860#define PRIO_MIN -4
861
862/* for Coro.pm */
863static GV *coro_current, *coro_idle;
864static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
865static int coro_nready;
866
867static void 1406static void
868coro_enq (pTHX_ SV *sv) 1407coro_enq (pTHX_ SV *coro_sv)
1408{
1409 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1410}
1411
1412static SV *
1413coro_deq (pTHX)
869{ 1414{
870 int prio; 1415 int prio;
871 1416
872 if (SvTYPE (sv) != SVt_PVHV)
873 croak ("Coro::ready tried to enqueue something that is not a coroutine");
874
875 prio = SvSTATE (sv)->prio;
876
877 av_push (coro_ready [prio - PRIO_MIN], sv);
878 coro_nready++;
879}
880
881static SV *
882coro_deq (pTHX_ int min_prio)
883{
884 int prio = PRIO_MAX - PRIO_MIN;
885
886 min_prio -= PRIO_MIN;
887 if (min_prio < 0)
888 min_prio = 0;
889
890 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1417 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
891 if (AvFILLp (coro_ready [prio]) >= 0) 1418 if (AvFILLp (coro_ready [prio]) >= 0)
892 {
893 coro_nready--;
894 return av_shift (coro_ready [prio]); 1419 return av_shift (coro_ready [prio]);
895 }
896 1420
897 return 0; 1421 return 0;
898} 1422}
899 1423
1424static int
1425api_ready (SV *coro_sv)
1426{
1427 dTHX;
1428 struct coro *coro;
1429 SV *sv_hook;
1430 void (*xs_hook)(void);
1431
1432 if (SvROK (coro_sv))
1433 coro_sv = SvRV (coro_sv);
1434
1435 coro = SvSTATE (coro_sv);
1436
1437 if (coro->flags & CF_READY)
1438 return 0;
1439
1440 coro->flags |= CF_READY;
1441
1442 LOCK;
1443
1444 sv_hook = coro_nready ? 0 : coro_readyhook;
1445 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1446
1447 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1448 ++coro_nready;
1449
1450 UNLOCK;
1451
1452 if (sv_hook)
1453 {
1454 dSP;
1455
1456 ENTER;
1457 SAVETMPS;
1458
1459 PUSHMARK (SP);
1460 PUTBACK;
1461 call_sv (sv_hook, G_DISCARD);
1462 SPAGAIN;
1463
1464 FREETMPS;
1465 LEAVE;
1466 }
1467
1468 if (xs_hook)
1469 xs_hook ();
1470
1471 return 1;
1472}
1473
1474static int
1475api_is_ready (SV *coro_sv)
1476{
1477 dTHX;
1478 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1479}
1480
900static void 1481static void
901api_ready (SV *coro) 1482prepare_schedule (pTHX_ struct transfer_args *ta)
902{ 1483{
903 dTHX; 1484 SV *prev_sv, *next_sv;
904 1485
905 if (SvROK (coro)) 1486 for (;;)
906 coro = SvRV (coro); 1487 {
1488 LOCK;
1489 next_sv = coro_deq (aTHX);
1490
1491 /* nothing to schedule: call the idle handler */
1492 if (expect_false (!next_sv))
1493 {
1494 dSP;
1495 UNLOCK;
1496
1497 ENTER;
1498 SAVETMPS;
1499
1500 PUSHMARK (SP);
1501 PUTBACK;
1502 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1503 SPAGAIN;
1504
1505 FREETMPS;
1506 LEAVE;
1507 continue;
1508 }
1509
1510 ta->next = SvSTATE (next_sv);
1511
1512 /* cannot transfer to destroyed coros, skip and look for next */
1513 if (expect_false (ta->next->flags & CF_DESTROYED))
1514 {
1515 UNLOCK;
1516 SvREFCNT_dec (next_sv);
1517 /* coro_nready is already taken care of by destroy */
1518 continue;
1519 }
1520
1521 --coro_nready;
1522 UNLOCK;
1523 break;
1524 }
1525
1526 /* free this only after the transfer */
1527 prev_sv = SvRV (coro_current);
1528 ta->prev = SvSTATE (prev_sv);
1529 TRANSFER_CHECK (*ta);
1530 assert (ta->next->flags & CF_READY);
1531 ta->next->flags &= ~CF_READY;
1532 SvRV_set (coro_current, next_sv);
907 1533
908 LOCK; 1534 LOCK;
909 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1535 free_coro_mortal (aTHX);
1536 coro_mortal = prev_sv;
910 UNLOCK; 1537 UNLOCK;
911} 1538}
912 1539
913static void 1540static void
914prepare_schedule (aTHX_ struct transfer_args *ta)
915{
916 SV *current, *prev, *next;
917
918 LOCK;
919
920 current = GvSV (coro_current);
921
922 for (;;)
923 {
924 LOCK;
925
926 next = coro_deq (aTHX_ PRIO_MIN);
927
928 if (next)
929 break;
930
931 UNLOCK;
932
933 {
934 dSP;
935
936 ENTER;
937 SAVETMPS;
938
939 PUSHMARK (SP);
940 PUTBACK;
941 call_sv (GvSV (coro_idle), G_DISCARD);
942
943 FREETMPS;
944 LEAVE;
945 }
946 }
947
948 prev = SvRV (current);
949 SvRV (current) = next;
950
951 /* free this only after the transfer */
952 free_coro_mortal ();
953 coro_mortal = prev;
954
955 ta->prev = SvSTATE (prev);
956 ta->next = SvSTATE (next);
957 ta->flags = TRANSFER_SAVE_ALL;
958
959 UNLOCK;
960}
961
962static void
963prepare_cede (aTHX_ struct transfer_args *ta) 1541prepare_cede (pTHX_ struct transfer_args *ta)
964{ 1542{
965 LOCK; 1543 api_ready (coro_current);
966 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
967 UNLOCK;
968
969 prepare_schedule (ta); 1544 prepare_schedule (aTHX_ ta);
1545}
1546
1547static int
1548prepare_cede_notself (pTHX_ struct transfer_args *ta)
1549{
1550 if (coro_nready)
1551 {
1552 SV *prev = SvRV (coro_current);
1553 prepare_schedule (aTHX_ ta);
1554 api_ready (prev);
1555 return 1;
1556 }
1557 else
1558 return 0;
970} 1559}
971 1560
972static void 1561static void
973api_schedule (void) 1562api_schedule (void)
974{ 1563{
975 dTHX; 1564 dTHX;
976 struct transfer_args ta; 1565 struct transfer_args ta;
977 1566
978 prepare_schedule (&ta); 1567 prepare_schedule (aTHX_ &ta);
979 TRANSFER (ta); 1568 TRANSFER (ta, 1);
980} 1569}
981 1570
982static void 1571static int
983api_cede (void) 1572api_cede (void)
984{ 1573{
985 dTHX; 1574 dTHX;
986 struct transfer_args ta; 1575 struct transfer_args ta;
987 1576
988 prepare_cede (&ta); 1577 prepare_cede (aTHX_ &ta);
1578
1579 if (expect_true (ta.prev != ta.next))
1580 {
989 TRANSFER (ta); 1581 TRANSFER (ta, 1);
1582 return 1;
1583 }
1584 else
1585 return 0;
990} 1586}
991 1587
1588static int
1589api_cede_notself (void)
1590{
1591 dTHX;
1592 struct transfer_args ta;
1593
1594 if (prepare_cede_notself (aTHX_ &ta))
1595 {
1596 TRANSFER (ta, 1);
1597 return 1;
1598 }
1599 else
1600 return 0;
1601}
1602
1603static void
1604api_trace (SV *coro_sv, int flags)
1605{
1606 dTHX;
1607 struct coro *coro = SvSTATE (coro_sv);
1608
1609 if (flags & CC_TRACE)
1610 {
1611 if (!coro->cctx)
1612 coro->cctx = cctx_new ();
1613 else if (!(coro->cctx->flags & CC_TRACE))
1614 croak ("cannot enable tracing on coroutine with custom stack");
1615
1616 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1617 }
1618 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1619 {
1620 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1621
1622 if (coro->flags & CF_RUNNING)
1623 PL_runops = RUNOPS_DEFAULT;
1624 else
1625 coro->slot->runops = RUNOPS_DEFAULT;
1626 }
1627}
1628
992MODULE = Coro::State PACKAGE = Coro::State 1629MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
993 1630
994PROTOTYPES: DISABLE 1631PROTOTYPES: DISABLE
995 1632
996BOOT: 1633BOOT:
997{ 1634{
998#ifdef USE_ITHREADS 1635#ifdef USE_ITHREADS
999 MUTEX_INIT (&coro_mutex); 1636 MUTEX_INIT (&coro_mutex);
1000#endif 1637#endif
1001 BOOT_PAGESIZE; 1638 BOOT_PAGESIZE;
1002 1639
1640 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1641 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1642
1643 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1644 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1645 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1646
1647 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1648 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1649 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1650
1003 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1651 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1004 1652
1005 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1653 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1006 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1654 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1007 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1655 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1656 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1008 1657
1009 main_mainstack = PL_mainstack; 1658 main_mainstack = PL_mainstack;
1659 main_top_env = PL_top_env;
1010 1660
1661 while (main_top_env->je_prev)
1662 main_top_env = main_top_env->je_prev;
1663
1011 coroapi.ver = CORO_API_VERSION; 1664 coroapi.ver = CORO_API_VERSION;
1665 coroapi.rev = CORO_API_REVISION;
1012 coroapi.transfer = api_transfer; 1666 coroapi.transfer = api_transfer;
1013 1667
1014 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1668 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1015} 1669}
1016 1670
1017SV * 1671SV *
1018new (char *klass, ...) 1672new (char *klass, ...)
1019 CODE: 1673 CODE:
1020{ 1674{
1021 struct coro *coro; 1675 struct coro *coro;
1676 MAGIC *mg;
1022 HV *hv; 1677 HV *hv;
1023 int i; 1678 int i;
1024 1679
1025 Newz (0, coro, 1, struct coro); 1680 Newz (0, coro, 1, struct coro);
1026 coro->args = newAV (); 1681 coro->args = newAV ();
1682 coro->flags = CF_NEW;
1027 1683
1684 if (coro_first) coro_first->prev = coro;
1685 coro->next = coro_first;
1686 coro_first = coro;
1687
1028 hv = newHV (); 1688 coro->hv = hv = newHV ();
1029 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1689 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1690 mg->mg_flags |= MGf_DUP;
1030 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1691 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1031 1692
1693 av_extend (coro->args, items - 1);
1032 for (i = 1; i < items; i++) 1694 for (i = 1; i < items; i++)
1033 av_push (coro->args, newSVsv (ST (i))); 1695 av_push (coro->args, newSVsv (ST (i)));
1034
1035 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1036 /*coro->stack = 0;*/
1037} 1696}
1038 OUTPUT: 1697 OUTPUT:
1039 RETVAL 1698 RETVAL
1040 1699
1700# these not obviously related functions are all rolled into the same xs
1701# function to increase chances that they all will call transfer with the same
1702# stack offset
1041void 1703void
1042_set_stacklevel (...) 1704_set_stacklevel (...)
1043 ALIAS: 1705 ALIAS:
1044 Coro::State::transfer = 1 1706 Coro::State::transfer = 1
1045 Coro::schedule = 2 1707 Coro::schedule = 2
1046 Coro::cede = 3 1708 Coro::cede = 3
1047 Coro::Cont::yield = 4 1709 Coro::cede_notself = 4
1048 CODE: 1710 CODE:
1049{ 1711{
1050 struct transfer_args ta; 1712 struct transfer_args ta;
1051 1713
1714 PUTBACK;
1052 switch (ix) 1715 switch (ix)
1053 { 1716 {
1054 case 0: 1717 case 0:
1055 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1718 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1056 ta.next = 0; 1719 ta.next = 0;
1057 ta.flags = TRANSFER_SET_STACKLEVEL;
1058 break; 1720 break;
1059 1721
1060 case 1: 1722 case 1:
1061 if (items != 3) 1723 if (items != 2)
1062 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1724 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1063 1725
1064 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1726 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1065 break; 1727 break;
1066 1728
1067 case 2: 1729 case 2:
1068 prepare_schedule (&ta); 1730 prepare_schedule (aTHX_ &ta);
1069 break; 1731 break;
1070 1732
1071 case 3: 1733 case 3:
1072 prepare_cede (&ta); 1734 prepare_cede (aTHX_ &ta);
1073 break; 1735 break;
1074 1736
1075 case 4: 1737 case 4:
1076 { 1738 if (!prepare_cede_notself (aTHX_ &ta))
1077 SV *yieldstack; 1739 XSRETURN_EMPTY;
1078 SV *sv;
1079 AV *defav = GvAV (PL_defgv);
1080 1740
1081 yieldstack = *hv_fetch (
1082 (HV *)SvRV (GvSV (coro_current)),
1083 "yieldstack", sizeof ("yieldstack") - 1,
1084 0
1085 );
1086
1087 /* set up @_ -- ugly */
1088 av_clear (defav);
1089 av_fill (defav, items - 1);
1090 while (items--)
1091 av_store (defav, items, SvREFCNT_inc (ST(items)));
1092
1093 sv = av_pop ((AV *)SvRV (yieldstack));
1094 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1095 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1096 ta.flags = 0;
1097 SvREFCNT_dec (sv);
1098 }
1099 break; 1741 break;
1100
1101 } 1742 }
1743 SPAGAIN;
1102 1744
1745 BARRIER;
1746 PUTBACK;
1103 TRANSFER (ta); 1747 TRANSFER (ta, 0);
1748 SPAGAIN; /* might be the sp of a different coroutine now */
1749 /* be extra careful not to ever do anything after TRANSFER */
1104} 1750}
1751
1752bool
1753_destroy (SV *coro_sv)
1754 CODE:
1755 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1756 OUTPUT:
1757 RETVAL
1105 1758
1106void 1759void
1107_clone_state_from (SV *dst, SV *src)
1108 CODE:
1109{
1110 struct coro *coro_src = SvSTATE (src);
1111
1112 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1113
1114 ++coro_src->refcnt;
1115 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1116}
1117
1118void
1119_nonlocal_goto (IV nextop)
1120 CODE:
1121 /* uuh, somebody will kill me again for this */
1122 PL_op->op_next = INT2PTR (OP *, nextop);
1123
1124void
1125_exit (code) 1760_exit (int code)
1126 int code
1127 PROTOTYPE: $ 1761 PROTOTYPE: $
1128 CODE: 1762 CODE:
1129 _exit (code); 1763 _exit (code);
1130 1764
1765int
1766cctx_stacksize (int new_stacksize = 0)
1767 CODE:
1768 RETVAL = coro_stacksize;
1769 if (new_stacksize)
1770 coro_stacksize = new_stacksize;
1771 OUTPUT:
1772 RETVAL
1773
1774int
1775cctx_count ()
1776 CODE:
1777 RETVAL = cctx_count;
1778 OUTPUT:
1779 RETVAL
1780
1781int
1782cctx_idle ()
1783 CODE:
1784 RETVAL = cctx_idle;
1785 OUTPUT:
1786 RETVAL
1787
1788void
1789list ()
1790 PPCODE:
1791{
1792 struct coro *coro;
1793 for (coro = coro_first; coro; coro = coro->next)
1794 if (coro->hv)
1795 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1796}
1797
1798void
1799call (Coro::State coro, SV *coderef)
1800 ALIAS:
1801 eval = 1
1802 CODE:
1803{
1804 if (coro->mainstack)
1805 {
1806 struct coro temp;
1807
1808 if (!(coro->flags & CF_RUNNING))
1809 {
1810 PUTBACK;
1811 save_perl (aTHX_ &temp);
1812 load_perl (aTHX_ coro);
1813 }
1814
1815 {
1816 dSP;
1817 ENTER;
1818 SAVETMPS;
1819 PUTBACK;
1820 PUSHSTACK;
1821 PUSHMARK (SP);
1822
1823 if (ix)
1824 eval_sv (coderef, 0);
1825 else
1826 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1827
1828 POPSTACK;
1829 SPAGAIN;
1830 FREETMPS;
1831 LEAVE;
1832 PUTBACK;
1833 }
1834
1835 if (!(coro->flags & CF_RUNNING))
1836 {
1837 save_perl (aTHX_ coro);
1838 load_perl (aTHX_ &temp);
1839 SPAGAIN;
1840 }
1841 }
1842}
1843
1844SV *
1845is_ready (Coro::State coro)
1846 PROTOTYPE: $
1847 ALIAS:
1848 is_ready = CF_READY
1849 is_running = CF_RUNNING
1850 is_new = CF_NEW
1851 is_destroyed = CF_DESTROYED
1852 CODE:
1853 RETVAL = boolSV (coro->flags & ix);
1854 OUTPUT:
1855 RETVAL
1856
1857void
1858api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1859
1860SV *
1861has_cctx (Coro::State coro)
1862 PROTOTYPE: $
1863 CODE:
1864 RETVAL = boolSV (!!coro->cctx);
1865 OUTPUT:
1866 RETVAL
1867
1868int
1869is_traced (Coro::State coro)
1870 PROTOTYPE: $
1871 CODE:
1872 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1873 OUTPUT:
1874 RETVAL
1875
1876IV
1877rss (Coro::State coro)
1878 PROTOTYPE: $
1879 ALIAS:
1880 usecount = 1
1881 CODE:
1882 switch (ix)
1883 {
1884 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1885 case 1: RETVAL = coro->usecount; break;
1886 }
1887 OUTPUT:
1888 RETVAL
1889
1890void
1891force_cctx ()
1892 CODE:
1893 struct coro *coro = SvSTATE (coro_current);
1894 coro->cctx->idle_sp = 0;
1895
1131MODULE = Coro::State PACKAGE = Coro 1896MODULE = Coro::State PACKAGE = Coro
1132 1897
1133BOOT: 1898BOOT:
1134{ 1899{
1135 int i; 1900 int i;
1136 1901
1902 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1903 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1904 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1905
1906 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1907 SvREADONLY_on (coro_current);
1908
1137 coro_stash = gv_stashpv ("Coro", TRUE); 1909 coro_stash = gv_stashpv ("Coro", TRUE);
1138 1910
1139 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1911 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1140 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1912 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1141 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1913 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1142 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1914 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1143 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1915 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1144 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1916 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1145 1917
1146 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1147 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1148
1149 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1918 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1150 coro_ready[i] = newAV (); 1919 coro_ready[i] = newAV ();
1151 1920
1152 { 1921 {
1153 SV *sv = perl_get_sv("Coro::API", 1); 1922 SV *sv = perl_get_sv ("Coro::API", TRUE);
1923 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1154 1924
1155 coroapi.schedule = api_schedule; 1925 coroapi.schedule = api_schedule;
1156 coroapi.cede = api_cede; 1926 coroapi.cede = api_cede;
1927 coroapi.cede_notself = api_cede_notself;
1157 coroapi.ready = api_ready; 1928 coroapi.ready = api_ready;
1929 coroapi.is_ready = api_is_ready;
1158 coroapi.nready = &coro_nready; 1930 coroapi.nready = &coro_nready;
1159 coroapi.current = coro_current; 1931 coroapi.current = coro_current;
1160 1932
1161 GCoroAPI = &coroapi; 1933 GCoroAPI = &coroapi;
1162 sv_setiv (sv, (IV)&coroapi); 1934 sv_setiv (sv, (IV)&coroapi);
1163 SvREADONLY_on (sv); 1935 SvREADONLY_on (sv);
1164 } 1936 }
1165} 1937}
1938
1939void
1940_set_current (SV *current)
1941 PROTOTYPE: $
1942 CODE:
1943 SvREFCNT_dec (SvRV (coro_current));
1944 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1945
1946void
1947_set_readyhook (SV *hook)
1948 PROTOTYPE: $
1949 CODE:
1950 LOCK;
1951 SvREFCNT_dec (coro_readyhook);
1952 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1953 UNLOCK;
1166 1954
1167int 1955int
1168prio (Coro::State coro, int newprio = 0) 1956prio (Coro::State coro, int newprio = 0)
1169 ALIAS: 1957 ALIAS:
1170 nice = 1 1958 nice = 1
… …
1173 RETVAL = coro->prio; 1961 RETVAL = coro->prio;
1174 1962
1175 if (items > 1) 1963 if (items > 1)
1176 { 1964 {
1177 if (ix) 1965 if (ix)
1178 newprio += coro->prio; 1966 newprio = coro->prio - newprio;
1179 1967
1180 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 1968 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1181 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 1969 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1182 1970
1183 coro->prio = newprio; 1971 coro->prio = newprio;
1184 } 1972 }
1185} 1973}
1974 OUTPUT:
1975 RETVAL
1186 1976
1187void 1977SV *
1188ready (SV *self) 1978ready (SV *self)
1189 PROTOTYPE: $ 1979 PROTOTYPE: $
1190 CODE: 1980 CODE:
1191 api_ready (self); 1981 RETVAL = boolSV (api_ready (self));
1982 OUTPUT:
1983 RETVAL
1192 1984
1193int 1985int
1194nready (...) 1986nready (...)
1195 PROTOTYPE: 1987 PROTOTYPE:
1196 CODE: 1988 CODE:
1197 RETVAL = coro_nready; 1989 RETVAL = coro_nready;
1198 OUTPUT: 1990 OUTPUT:
1199 RETVAL 1991 RETVAL
1200 1992
1993void
1994throw (Coro::State self, SV *throw = &PL_sv_undef)
1995 PROTOTYPE: $;$
1996 CODE:
1997 SvREFCNT_dec (self->throw);
1998 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1999
2000void
2001swap_defsv (Coro::State self)
2002 PROTOTYPE: $
2003 ALIAS:
2004 swap_defav = 1
2005 CODE:
2006 if (!self->slot)
2007 croak ("cannot swap state with coroutine that has no saved state");
2008 else
2009 {
2010 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2011 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2012
2013 SV *tmp = *src; *src = *dst; *dst = tmp;
2014 }
2015
2016# for async_pool speedup
2017void
2018_pool_1 (SV *cb)
2019 CODE:
2020{
2021 struct coro *coro = SvSTATE (coro_current);
2022 HV *hv = (HV *)SvRV (coro_current);
2023 AV *defav = GvAV (PL_defgv);
2024 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2025 AV *invoke_av;
2026 int i, len;
2027
2028 if (!invoke)
2029 {
2030 SV *old = PL_diehook;
2031 PL_diehook = 0;
2032 SvREFCNT_dec (old);
2033 croak ("\3async_pool terminate\2\n");
2034 }
2035
2036 SvREFCNT_dec (coro->saved_deffh);
2037 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2038
2039 hv_store (hv, "desc", sizeof ("desc") - 1,
2040 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2041
2042 invoke_av = (AV *)SvRV (invoke);
2043 len = av_len (invoke_av);
2044
2045 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2046
2047 if (len > 0)
2048 {
2049 av_fill (defav, len - 1);
2050 for (i = 0; i < len; ++i)
2051 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2052 }
2053
2054 SvREFCNT_dec (invoke);
2055}
2056
2057void
2058_pool_2 (SV *cb)
2059 CODE:
2060{
2061 struct coro *coro = SvSTATE (coro_current);
2062
2063 sv_setsv (cb, &PL_sv_undef);
2064
2065 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2066 coro->saved_deffh = 0;
2067
2068 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2069 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2070 {
2071 SV *old = PL_diehook;
2072 PL_diehook = 0;
2073 SvREFCNT_dec (old);
2074 croak ("\3async_pool terminate\2\n");
2075 }
2076
2077 av_clear (GvAV (PL_defgv));
2078 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2079 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2080
2081 coro->prio = 0;
2082
2083 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2084 api_trace (coro_current, 0);
2085
2086 av_push (av_async_pool, newSVsv (coro_current));
2087}
2088
2089
1201MODULE = Coro::State PACKAGE = Coro::AIO 2090MODULE = Coro::State PACKAGE = Coro::AIO
1202 2091
1203SV * 2092SV *
1204_get_state () 2093_get_state ()
1205 CODE: 2094 CODE:
1206{ 2095{
1207 struct { 2096 struct io_state *data;
1208 int errorno;
1209 int laststype;
1210 int laststatval;
1211 Stat_t statcache;
1212 } data;
1213 2097
2098 RETVAL = newSV (sizeof (struct io_state));
2099 data = (struct io_state *)SvPVX (RETVAL);
2100 SvCUR_set (RETVAL, sizeof (struct io_state));
2101 SvPOK_only (RETVAL);
2102
1214 data.errorno = errno; 2103 data->errorno = errno;
1215 data.laststype = PL_laststype; 2104 data->laststype = PL_laststype;
1216 data.laststatval = PL_laststatval; 2105 data->laststatval = PL_laststatval;
1217 data.statcache = PL_statcache; 2106 data->statcache = PL_statcache;
1218
1219 RETVAL = newSVpvn ((char *)&data, sizeof data);
1220} 2107}
1221 OUTPUT: 2108 OUTPUT:
1222 RETVAL 2109 RETVAL
1223 2110
1224void 2111void
1225_set_state (char *data_) 2112_set_state (char *data_)
1226 PROTOTYPE: $ 2113 PROTOTYPE: $
1227 CODE: 2114 CODE:
1228{ 2115{
1229 struct { 2116 struct io_state *data = (void *)data_;
1230 int errorno;
1231 int laststype;
1232 int laststatval;
1233 Stat_t statcache;
1234 } *data = (void *)data_;
1235 2117
1236 errno = data->errorno; 2118 errno = data->errorno;
1237 PL_laststype = data->laststype; 2119 PL_laststype = data->laststype;
1238 PL_laststatval = data->laststatval; 2120 PL_laststatval = data->laststatval;
1239 PL_statcache = data->statcache; 2121 PL_statcache = data->statcache;
1240} 2122}
2123
2124
2125MODULE = Coro::State PACKAGE = Coro::AnyEvent
2126
2127BOOT:
2128 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2129
2130SV *
2131_schedule (...)
2132 PROTOTYPE: @
2133 CODE:
2134{
2135 static int incede;
2136
2137 api_cede_notself ();
2138
2139 ++incede;
2140 while (coro_nready >= incede && api_cede ())
2141 ;
2142
2143 sv_setsv (sv_activity, &PL_sv_undef);
2144 if (coro_nready >= incede)
2145 {
2146 PUSHMARK (SP);
2147 PUTBACK;
2148 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2149 SPAGAIN;
2150 }
2151
2152 --incede;
2153}
2154

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines