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Comparing Coro/Coro/State.xs (file contents):
Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC vs.
Revision 1.271 by root, Fri Nov 14 07:35:32 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
12
13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
8 55
9#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
10 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
11 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
12 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
13 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
14 61
15#if !PERL_VERSION_ATLEAST (5,8,0) 62#if !PERL_VERSION_ATLEAST (5,6,0)
16# ifndef PL_ppaddr 63# ifndef PL_ppaddr
17# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
18# endif 65# endif
19# ifndef call_sv 66# ifndef call_sv
20# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
31# ifndef IS_PADCONST 78# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
33# endif 80# endif
34#endif 81#endif
35 82
36#include <stdio.h> 83/* 5.11 */
37#include <errno.h> 84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
38 105
39#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40# undef STACKGUARD 107# undef CORO_STACKGUARD
41#endif
42
43#ifndef STACKGUARD
44# define STACKGUARD 0
45#endif
46
47#ifdef HAVE_MMAP
48# include <unistd.h>
49# include <sys/mman.h>
50# ifndef MAP_ANONYMOUS
51# ifdef MAP_ANON
52# define MAP_ANONYMOUS MAP_ANON
53# else
54# undef HAVE_MMAP
55# endif
56# endif 108#endif
57# include <limits.h> 109
58# ifndef PAGESIZE 110#ifndef CORO_STACKGUARD
59# define PAGESIZE pagesize 111# define CORO_STACKGUARD 0
60# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61static long pagesize;
62# else
63# define BOOT_PAGESIZE
64# endif 112#endif
65#endif
66 113
67/* The next macro should declare a variable stacklevel that contains and approximation 114/* prefer perl internal functions over our own? */
68 * to the current C stack pointer. Its property is that it changes with each call 115#ifndef CORO_PREFER_PERL_FUNCTIONS
69 * and should be unique. */ 116# define CORO_PREFER_PERL_FUNCTIONS 0
70#define dSTACKLEVEL int stacklevel 117#endif
71#define STACKLEVEL ((void *)&stacklevel) 118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
72 126
73#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
74 128
75#if __GNUC__ >= 3 129#if __GNUC__ >= 3
76# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
77#else 133#else
78# define attribute(x) 134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
79#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
80 141
81#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
82 143
83#include "CoroAPI.h" 144#include "CoroAPI.h"
84 145
85#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86
87#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
147
88static perl_mutex coro_mutex; 148static perl_mutex coro_lock;
89# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
90# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
91#else 155#else
156
92# define LOCK (void)0 157# define LOCK (void)0
93# define UNLOCK (void)0 158# define UNLOCK (void)0
94#endif
95 159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
96static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
97static AV *main_mainstack; /* used to differentiate between $main and others */ 182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
98static HV *coro_state_stash, *coro_stash; 184static HV *coro_state_stash, *coro_stash;
99static SV *coro_mortal; /* will be freed after next transfer */ 185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
187
188struct transfer_args
189{
190 struct coro *prev, *next;
191};
192
193static GV *irsgv; /* $/ */
194static GV *stdoutgv; /* *STDOUT */
195static SV *rv_diehook;
196static SV *rv_warnhook;
197static HV *hv_sig; /* %SIG */
198
199/* async_pool helper stuff */
200static SV *sv_pool_rss;
201static SV *sv_pool_size;
202static AV *av_async_pool;
203
204/* Coro::AnyEvent */
205static SV *sv_activity;
206
207static struct coro_cctx *cctx_first;
208static int cctx_count, cctx_idle;
209
210enum {
211 CC_MAPPED = 0x01,
212 CC_NOREUSE = 0x02, /* throw this away after tracing */
213 CC_TRACE = 0x04,
214 CC_TRACE_SUB = 0x08, /* trace sub calls */
215 CC_TRACE_LINE = 0x10, /* trace each statement */
216 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
217};
100 218
101/* this is a structure representing a c-level coroutine */ 219/* this is a structure representing a c-level coroutine */
102typedef struct coro_stack { 220typedef struct coro_cctx {
103 struct coro_stack *next; 221 struct coro_cctx *next;
104 222
105 /* the stack */ 223 /* the stack */
106 void *sptr; 224 void *sptr;
107 long ssize; /* positive == mmap, otherwise malloc */ 225 size_t ssize;
108 226
109 /* cpu state */ 227 /* cpu state */
110 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 228 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
229 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111 JMPENV *top_env; 230 JMPENV *top_env;
112 coro_context cctx; 231 coro_context cctx;
113} coro_stack; 232
233 U32 gen;
234#if CORO_USE_VALGRIND
235 int valgrind_id;
236#endif
237 unsigned char flags;
238} coro_cctx;
239
240enum {
241 CF_RUNNING = 0x0001, /* coroutine is running */
242 CF_READY = 0x0002, /* coroutine is ready */
243 CF_NEW = 0x0004, /* has never been switched to */
244 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
245};
246
247/* the structure where most of the perl state is stored, overlaid on the cxstack */
248typedef struct {
249 SV *defsv;
250 AV *defav;
251 SV *errsv;
252 SV *irsgv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
114 259
115/* this is a structure representing a perl-level coroutine */ 260/* this is a structure representing a perl-level coroutine */
116struct coro { 261struct coro {
117 /* the c coroutine allocated to this perl coroutine, if any */ 262 /* the c coroutine allocated to this perl coroutine, if any */
118 coro_stack *stack; 263 coro_cctx *cctx;
119 264
120 /* data associated with this coroutine (initial args) */ 265 /* process data */
121 AV *args;
122 int refcnt;
123
124 /* optionally saved, might be zero */
125 AV *defav;
126 SV *defsv;
127 SV *errsv;
128
129 /* saved global state not related to stacks */
130 U8 dowarn;
131 I32 in_eval;
132
133 /* the stacks and related info (callchain etc..) */
134 PERL_SI *curstackinfo;
135 AV *curstack;
136 AV *mainstack; 266 AV *mainstack;
137 SV **stack_sp; 267 perl_slots *slot; /* basically the saved sp */
138 OP *op; 268
139 SV **curpad; 269 AV *args; /* data associated with this coroutine (initial args) */
140 AV *comppad; 270 int refcnt; /* coroutines are refcounted, yes */
141 CV *compcv; 271 int flags; /* CF_ flags */
142 SV **stack_base; 272 HV *hv; /* the perl hash associated with this coro, if any */
143 SV **stack_max; 273
144 SV **tmps_stack; 274 /* statistics */
145 I32 tmps_floor; 275 int usecount; /* number of transfers to this coro */
146 I32 tmps_ix;
147 I32 tmps_max;
148 I32 *markstack;
149 I32 *markstack_ptr;
150 I32 *markstack_max;
151 I32 *scopestack;
152 I32 scopestack_ix;
153 I32 scopestack_max;
154 ANY *savestack;
155 I32 savestack_ix;
156 I32 savestack_max;
157 OP **retstack;
158 I32 retstack_ix;
159 I32 retstack_max;
160 PMOP *curpm;
161 COP *curcop;
162 276
163 /* coro process data */ 277 /* coro process data */
164 int prio; 278 int prio;
279 SV *throw; /* exception to be thrown */
280
281 /* async_pool */
282 SV *saved_deffh;
283
284 /* linked list */
285 struct coro *next, *prev;
165}; 286};
166 287
167typedef struct coro *Coro__State; 288typedef struct coro *Coro__State;
168typedef struct coro *Coro__State_or_hashref; 289typedef struct coro *Coro__State_or_hashref;
169 290
291/** Coro ********************************************************************/
292
293#define PRIO_MAX 3
294#define PRIO_HIGH 1
295#define PRIO_NORMAL 0
296#define PRIO_LOW -1
297#define PRIO_IDLE -3
298#define PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static struct coro *coro_first;
305#define coro_nready coroapi.nready
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
170static AV * 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339static AV *
171coro_clone_padlist (CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
172{ 341{
173 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
174 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
175 344
176 newpadlist = newAV (); 345 newpadlist = newAV ();
177 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
178#if PERL_VERSION_ATLEAST (5,9,0) 347#if PERL_VERSION_ATLEAST (5,10,0)
179 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
180#else 349#else
181 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
182#endif 351#endif
183 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
184 --AvFILLp (padlist); 353 --AvFILLp (padlist);
185 354
186 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
187 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
188 357
189 return newpadlist; 358 return newpadlist;
190} 359}
191 360
192static void 361static void
193free_padlist (AV *padlist) 362free_padlist (pTHX_ AV *padlist)
194{ 363{
195 /* may be during global destruction */ 364 /* may be during global destruction */
196 if (SvREFCNT (padlist)) 365 if (SvREFCNT (padlist))
197 { 366 {
198 I32 i = AvFILLp (padlist); 367 I32 i = AvFILLp (padlist);
… …
219 AV *padlist; 388 AV *padlist;
220 AV *av = (AV *)mg->mg_obj; 389 AV *av = (AV *)mg->mg_obj;
221 390
222 /* casting is fun. */ 391 /* casting is fun. */
223 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224 free_padlist (padlist); 393 free_padlist (aTHX_ padlist);
225 394
226 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
227 396
228 return 0; 397 return 0;
229} 398}
230 399
231#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
232 402
233static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
234 443
235/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
236static void 445static void
237get_padlist (CV *cv) 446get_padlist (pTHX_ CV *cv)
238{ 447{
239 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
240 450
241 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 453 else
244 { 454 {
245#if 0 455#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
247 CV *cp = Perl_cv_clone (cv); 458 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
251#else 462#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 464#endif
254 } 465 }
255} 466}
256 467
257static void 468static void
258put_padlist (CV *cv) 469put_padlist (pTHX_ CV *cv)
259{ 470{
260 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
261 473
262 if (!mg) 474 if (expect_false (!mg))
263 { 475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
264 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266 mg->mg_virtual = &vtbl_coro;
267 mg->mg_obj = (SV *)newAV ();
268 }
269 476
270 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 477 av = (AV *)mg->mg_obj;
271}
272 478
273#define SB do { 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274#define SE } while (0) 480 av_extend (av, AvMAX (av) + 1);
275 481
276#define LOAD(state) load_state((state)); 482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277#define SAVE(state,flags) save_state((state),(flags)); 483}
278 484
279#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 485/** load & save, init *******************************************************/
280 486
281static void 487static void
282load_state(Coro__State c) 488load_perl (pTHX_ Coro__State c)
283{ 489{
284 PL_dowarn = c->dowarn; 490 perl_slots *slot = c->slot;
285 PL_in_eval = c->in_eval; 491 c->slot = 0;
286 492
287 PL_curstackinfo = c->curstackinfo;
288 PL_curstack = c->curstack;
289 PL_mainstack = c->mainstack; 493 PL_mainstack = c->mainstack;
290 PL_stack_sp = c->stack_sp;
291 PL_op = c->op;
292 PL_curpad = c->curpad;
293 PL_comppad = c->comppad;
294 PL_compcv = c->compcv;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310#if !PERL_VERSION_ATLEAST (5,9,0)
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314#endif
315 PL_curpm = c->curpm;
316 PL_curcop = c->curcop;
317 494
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 495 GvSV (PL_defgv) = slot->defsv;
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 496 GvAV (PL_defgv) = slot->defav;
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
500 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h"
502 #undef VAR
321 503
322 { 504 {
323 dSP; 505 dSP;
506
324 CV *cv; 507 CV *cv;
325 508
326 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
328 { 511 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
335 } 514 CvPADLIST (cv) = (AV *)POPs;
336
337 ++CvDEPTH(cv);
338 } 515 }
339 516
340 PUTBACK; 517 PUTBACK;
341 } 518 }
342} 519}
343 520
344static void 521static void
345save_state(Coro__State c, int flags) 522save_perl (pTHX_ Coro__State c)
346{ 523{
347 { 524 {
348 dSP; 525 dSP;
349 I32 cxix = cxstack_ix; 526 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 527 PERL_CONTEXT *ccstk = cxstack;
… …
353 /* 530 /*
354 * the worst thing you can imagine happens first - we have to save 531 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :( 532 * (and reinitialize) all cv's in the whole callchain :(
356 */ 533 */
357 534
358 PUSHs (Nullsv); 535 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 536 /* this loop was inspired by pp_caller */
360 for (;;) 537 for (;;)
361 { 538 {
362 while (cxix >= 0) 539 while (expect_true (cxix >= 0))
363 { 540 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 541 PERL_CONTEXT *cx = &ccstk[cxix--];
365 542
366 if (CxTYPE(cx) == CXt_SUB) 543 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
367 { 544 {
368 CV *cv = cx->blk_sub.cv; 545 CV *cv = cx->blk_sub.cv;
546
369 if (CvDEPTH(cv)) 547 if (expect_true (CvDEPTH (cv)))
370 { 548 {
371 EXTEND (SP, CvDEPTH(cv)*2); 549 EXTEND (SP, 3);
372
373 while (--CvDEPTH(cv))
374 {
375 /* this tells the restore code to increment CvDEPTH */
376 PUSHs (Nullsv);
377 PUSHs ((SV *)cv);
378 }
379
380 PUSHs ((SV *)CvPADLIST(cv)); 550 PUSHs ((SV *)CvPADLIST (cv));
551 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 552 PUSHs ((SV *)cv);
382 553
554 CvDEPTH (cv) = 0;
383 get_padlist (cv); 555 get_padlist (aTHX_ cv);
384 } 556 }
385 } 557 }
386#ifdef CXt_FORMAT
387 else if (CxTYPE(cx) == CXt_FORMAT)
388 {
389 /* I never used formats, so how should I know how these are implemented? */
390 /* my bold guess is as a simple, plain sub... */
391 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392 }
393#endif
394 } 558 }
395 559
396 if (top_si->si_type == PERLSI_MAIN) 560 if (expect_true (top_si->si_type == PERLSI_MAIN))
397 break; 561 break;
398 562
399 top_si = top_si->si_prev; 563 top_si = top_si->si_prev;
400 ccstk = top_si->si_cxstack; 564 ccstk = top_si->si_cxstack;
401 cxix = top_si->si_cxix; 565 cxix = top_si->si_cxix;
402 } 566 }
403 567
404 PUTBACK; 568 PUTBACK;
405 } 569 }
406 570
407 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 571 /* allocate some space on the context stack for our purposes */
408 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 572 /* we manually unroll here, as usually 2 slots is enough */
409 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 573 if (SLOT_COUNT >= 1) CXINC;
574 if (SLOT_COUNT >= 2) CXINC;
575 if (SLOT_COUNT >= 3) CXINC;
576 {
577 int i;
578 for (i = 3; i < SLOT_COUNT; ++i)
579 CXINC;
580 }
581 cxstack_ix -= SLOT_COUNT; /* undo allocation */
410 582
411 c->dowarn = PL_dowarn;
412 c->in_eval = PL_in_eval;
413
414 c->curstackinfo = PL_curstackinfo;
415 c->curstack = PL_curstack;
416 c->mainstack = PL_mainstack; 583 c->mainstack = PL_mainstack;
417 c->stack_sp = PL_stack_sp; 584
418 c->op = PL_op; 585 {
419 c->curpad = PL_curpad; 586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420 c->comppad = PL_comppad; 587
421 c->compcv = PL_compcv; 588 slot->defav = GvAV (PL_defgv);
422 c->stack_base = PL_stack_base; 589 slot->defsv = DEFSV;
423 c->stack_max = PL_stack_max; 590 slot->errsv = ERRSV;
424 c->tmps_stack = PL_tmps_stack; 591 slot->irsgv = GvSV (irsgv);
425 c->tmps_floor = PL_tmps_floor; 592
426 c->tmps_ix = PL_tmps_ix; 593 #define VAR(name,type) slot->name = PL_ ## name;
427 c->tmps_max = PL_tmps_max; 594 # include "state.h"
428 c->markstack = PL_markstack; 595 #undef VAR
429 c->markstack_ptr = PL_markstack_ptr; 596 }
430 c->markstack_max = PL_markstack_max;
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437#if !PERL_VERSION_ATLEAST (5,9,0)
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441#endif
442 c->curpm = PL_curpm;
443 c->curcop = PL_curcop;
444} 597}
445 598
446/* 599/*
447 * allocate various perl stacks. This is an exact copy 600 * allocate various perl stacks. This is an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 601 * of perl.c:init_stacks, except that it uses less memory
449 * on the (sometimes correct) assumption that coroutines do 602 * on the (sometimes correct) assumption that coroutines do
450 * not usually need a lot of stackspace. 603 * not usually need a lot of stackspace.
451 */ 604 */
605#if CORO_PREFER_PERL_FUNCTIONS
606# define coro_init_stacks init_stacks
607#else
452static void 608static void
453coro_init_stacks () 609coro_init_stacks (pTHX)
454{ 610{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 611 PL_curstackinfo = new_stackinfo(32, 8);
456 PL_curstackinfo->si_type = PERLSI_MAIN; 612 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 613 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 614 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 615
460 PL_stack_base = AvARRAY(PL_curstack); 616 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 617 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 618 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 619
464 New(50,PL_tmps_stack,96,SV*); 620 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 621 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 622 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 623 PL_tmps_max = 32;
468 624
469 New(54,PL_markstack,16,I32); 625 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 626 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 627 PL_markstack_max = PL_markstack + 16;
472 628
473#ifdef SET_MARK_OFFSET 629#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 630 SET_MARK_OFFSET;
475#endif 631#endif
476 632
477 New(54,PL_scopestack,16,I32); 633 New(54,PL_scopestack,8,I32);
478 PL_scopestack_ix = 0; 634 PL_scopestack_ix = 0;
479 PL_scopestack_max = 16; 635 PL_scopestack_max = 8;
480 636
481 New(54,PL_savestack,96,ANY); 637 New(54,PL_savestack,24,ANY);
482 PL_savestack_ix = 0; 638 PL_savestack_ix = 0;
483 PL_savestack_max = 96; 639 PL_savestack_max = 24;
484 640
485#if !PERL_VERSION_ATLEAST (5,9,0) 641#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 642 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 643 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 644 PL_retstack_max = 4;
489#endif 645#endif
490} 646}
647#endif
491 648
492/* 649/*
493 * destroy the stacks, the callchain etc... 650 * destroy the stacks, the callchain etc...
494 */ 651 */
495static void 652static void
496destroy_stacks() 653coro_destruct_stacks (pTHX)
497{ 654{
498 if (!IN_DESTRUCT)
499 {
500 /* is this ugly, I ask? */
501 LEAVE_SCOPE (0);
502
503 /* sure it is, but more important: is it correct?? :/ */
504 FREETMPS;
505
506 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507 }
508
509 while (PL_curstackinfo->si_next) 655 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 656 PL_curstackinfo = PL_curstackinfo->si_next;
511 657
512 while (PL_curstackinfo) 658 while (PL_curstackinfo)
513 { 659 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 660 PERL_SI *p = PL_curstackinfo->si_prev;
515 661
516 { /*D*//*remove*/
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 662 if (!IN_DESTRUCT)
523 {
524 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec (PL_curstackinfo->si_stack); 663 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 664
528 Safefree (PL_curstackinfo->si_cxstack); 665 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo); 666 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 667 PL_curstackinfo = p;
531 } 668 }
532 669
533 Safefree (PL_tmps_stack); 670 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 671 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 672 Safefree (PL_scopestack);
536 Safefree (PL_savestack); 673 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 674#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 675 Safefree (PL_retstack);
539#endif 676#endif
540} 677}
541 678
679static size_t
680coro_rss (pTHX_ struct coro *coro)
681{
682 size_t rss = sizeof (*coro);
683
684 if (coro->mainstack)
685 {
686 perl_slots tmp_slot;
687 perl_slots *slot;
688
689 if (coro->flags & CF_RUNNING)
690 {
691 slot = &tmp_slot;
692
693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR
696 }
697 else
698 slot = coro->slot;
699
700 if (slot)
701 {
702 rss += sizeof (slot->curstackinfo);
703 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
705 rss += slot->tmps_max * sizeof (SV *);
706 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
707 rss += slot->scopestack_max * sizeof (I32);
708 rss += slot->savestack_max * sizeof (ANY);
709
710#if !PERL_VERSION_ATLEAST (5,10,0)
711 rss += slot->retstack_max * sizeof (OP *);
712#endif
713 }
714 }
715
716 return rss;
717}
718
719/** set stacklevel support **************************************************/
720
721/* we sometimes need to create the effect of pp_slf calling us */
722#define SLF_HEAD (void)0
723/* we sometimes need to create the effect of leaving via pp_slf */
724#define SLF_TAIL slf_tail (aTHX)
725
726INLINE void
727slf_tail (pTHX)
728{
729 dSP;
730 SV **bot = SP;
731
732 int gimme = GIMME_V;
733
734 /* make sure we put something on the stack in scalar context */
735 if (gimme == G_SCALAR)
736 {
737 if (sp == bot)
738 XPUSHs (&PL_sv_undef);
739
740 SP = bot + 1;
741 }
742
743 PUTBACK;
744}
745
746/** coroutine stack handling ************************************************/
747
748static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
749static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
750static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
751
752/* apparently < 5.8.8 */
753#ifndef MgPV_nolen_const
754#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
755 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
756 (const char*)(mg)->mg_ptr)
757#endif
758
759/*
760 * This overrides the default magic get method of %SIG elements.
761 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
762 * and instead of tryign to save and restore the hash elements, we just provide
763 * readback here.
764 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
765 * not expecting this to actually change the hook. This is a potential problem
766 * when a schedule happens then, but we ignore this.
767 */
768static int
769coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
770{
771 const char *s = MgPV_nolen_const (mg);
772
773 if (*s == '_')
774 {
775 SV **svp = 0;
776
777 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
778 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
779
780 if (svp)
781 {
782 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = 0;
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
812}
813
814static int
815coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
816{
817 const char *s = MgPV_nolen_const (mg);
818
819 if (*s == '_')
820 {
821 SV **svp = 0;
822
823 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
824 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
825
826 if (svp)
827 {
828 SV *old = *svp;
829 *svp = newSVsv (sv);
830 SvREFCNT_dec (old);
831 return 0;
832 }
833 }
834
835 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
836}
837
542static void 838static void
543setup_coro (struct coro *coro) 839coro_setup (pTHX_ struct coro *coro)
544{ 840{
545 /* 841 /*
546 * emulate part of the perl startup here. 842 * emulate part of the perl startup here.
547 */ 843 */
548 dTHX; 844 coro_init_stacks (aTHX);
845
846 PL_runops = RUNOPS_DEFAULT;
847 PL_curcop = &PL_compiling;
848 PL_in_eval = EVAL_NULL;
849 PL_comppad = 0;
850 PL_curpm = 0;
851 PL_curpad = 0;
852 PL_localizing = 0;
853 PL_dirty = 0;
854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862
863 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
867 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
869
870 {
871 dSP;
872 UNOP myop;
873
874 Zero (&myop, 1, UNOP);
875 myop.op_next = Nullop;
876 myop.op_flags = OPf_WANT_VOID;
877
878 PUSHMARK (SP);
879 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
880 PUTBACK;
881 PL_op = (OP *)&myop;
882 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
883 SPAGAIN;
884 }
885
886 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
888 * so we have to emulate entering pp_set_stacklevel here.
889 */
890 SLF_HEAD;
891}
892
893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
914 SvREFCNT_dec (GvAV (PL_defgv));
915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (coro->throw);
925
926 coro_destruct_stacks (aTHX);
927}
928
929INLINE void
930free_coro_mortal (pTHX)
931{
932 if (expect_true (coro_mortal))
933 {
934 SvREFCNT_dec (coro_mortal);
935 coro_mortal = 0;
936 }
937}
938
939static int
940runops_trace (pTHX)
941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 {
949 PERL_ASYNC_CHECK ();
950
951 if (cctx->flags & CC_TRACE_ALL)
952 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
954 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top;
957 AV *av = newAV (); /* return values */
958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
997 {
998 SV **cb;
999
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1001 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
1032 }
1033
1034 if (cctx->flags & CC_TRACE_LINE)
1035 {
1036 dSP;
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054 }
1055 }
1056 }
1057 }
1058
1059 TAINT_NOT;
1060 return 0;
1061}
1062
1063static void
1064prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1065{
1066 ta->prev = (struct coro *)cctx;
1067 ta->next = 0;
1068}
1069
1070/* inject a fake call to Coro::State::_cctx_init into the execution */
1071/* _cctx_init should be careful, as it could be called at almost any time */
1072/* during execution of a perl program */
1073/* also initialises PL_top_env */
1074static void NOINLINE
1075cctx_prepare (pTHX_ coro_cctx *cctx)
1076{
549 dSP; 1077 dSP;
550 UNOP myop; 1078 UNOP myop;
551 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
552 1079
553 coro_init_stacks (); 1080 PL_top_env = &PL_start_env;
554 /*PL_curcop = 0;*/
555 /*PL_in_eval = PL_in_eval;*/ /* inherit */
556 SvREFCNT_dec (GvAV (PL_defgv));
557 GvAV (PL_defgv) = coro->args; coro->args = 0;
558 1081
559 SPAGAIN; 1082 if (cctx->flags & CC_TRACE)
1083 PL_runops = runops_trace;
560 1084
561 Zero (&myop, 1, UNOP); 1085 Zero (&myop, 1, UNOP);
562 myop.op_next = Nullop; 1086 myop.op_next = PL_op;
563 myop.op_flags = OPf_WANT_VOID; 1087 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
564 1088
1089 PUSHMARK (SP);
1090 EXTEND (SP, 2);
1091 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1092 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1093 PUTBACK;
565 PL_op = (OP *)&myop; 1094 PL_op = (OP *)&myop;
566
567 PUSHMARK(SP);
568 XPUSHs (sub_init);
569 PUTBACK;
570 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1095 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
571 SPAGAIN; 1096 SPAGAIN;
572
573 ENTER; /* necessary e.g. for dounwind */
574} 1097}
575 1098
1099/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void
1101transfer_tail (pTHX)
1102{
1103 struct coro *next = (struct coro *)transfer_next;
1104 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1105 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1106
1107 free_coro_mortal (aTHX);
1108 UNLOCK;
1109
1110 if (expect_false (next->throw))
1111 {
1112 SV *exception = sv_2mortal (next->throw);
1113
1114 next->throw = 0;
1115 sv_setsv (ERRSV, exception);
1116 croak (0);
1117 }
1118}
1119
1120/*
1121 * this is a _very_ stripped down perl interpreter ;)
1122 */
576static void 1123static void
577free_coro_mortal () 1124cctx_run (void *arg)
578{ 1125{
579 if (coro_mortal) 1126#ifdef USE_ITHREADS
1127# if CORO_PTHREAD
1128 PERL_SET_CONTEXT (coro_thx);
1129# endif
1130#endif
580 { 1131 {
581 SvREFCNT_dec (coro_mortal); 1132 dTHX;
582 coro_mortal = 0; 1133
1134 /* we are the alternative tail to pp_set_stacklevel */
1135 /* so do the same things here */
1136 SLF_TAIL;
1137
1138 /* we now skip the op that did lead to transfer() */
1139 PL_op = PL_op->op_next;
1140
1141 /* inject a fake subroutine call to cctx_init */
1142 cctx_prepare (aTHX_ (coro_cctx *)arg);
1143
1144 /* cctx_run is the alternative tail of transfer() */
1145 transfer_tail (aTHX);
1146
1147 /* somebody or something will hit me for both perl_run and PL_restartop */
1148 PL_restartop = PL_op;
1149 perl_run (PL_curinterp);
1150
1151 /*
1152 * If perl-run returns we assume exit() was being called or the coro
1153 * fell off the end, which seems to be the only valid (non-bug)
1154 * reason for perl_run to return. We try to exit by jumping to the
1155 * bootstrap-time "top" top_env, as we cannot restore the "main"
1156 * coroutine as Coro has no such concept
1157 */
1158 PL_top_env = main_top_env;
1159 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1160 }
1161}
1162
1163static coro_cctx *
1164cctx_new ()
1165{
1166 coro_cctx *cctx;
1167
1168 ++cctx_count;
1169 New (0, cctx, 1, coro_cctx);
1170
1171 cctx->gen = cctx_gen;
1172 cctx->flags = 0;
1173 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx only suitable as source */
1179static coro_cctx *
1180cctx_new_empty ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183
1184 cctx->sptr = 0;
1185 coro_create (&cctx->cctx, 0, 0, 0, 0);
1186
1187 return cctx;
1188}
1189
1190/* create a new cctx suitable as destination/running a perl interpreter */
1191static coro_cctx *
1192cctx_new_run ()
1193{
1194 coro_cctx *cctx = cctx_new ();
1195 void *stack_start;
1196 size_t stack_size;
1197
1198#if HAVE_MMAP
1199 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1200 /* mmap supposedly does allocate-on-write for us */
1201 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1202
1203 if (cctx->sptr != (void *)-1)
583 } 1204 {
584} 1205 #if CORO_STACKGUARD
1206 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1207 #endif
1208 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1209 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1210 cctx->flags |= CC_MAPPED;
1211 }
1212 else
1213#endif
1214 {
1215 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1216 New (0, cctx->sptr, cctx_stacksize, long);
585 1217
1218 if (!cctx->sptr)
1219 {
1220 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1221 _exit (EXIT_FAILURE);
1222 }
1223
1224 stack_start = cctx->sptr;
1225 stack_size = cctx->ssize;
1226 }
1227
1228 #if CORO_USE_VALGRIND
1229 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1230 #endif
1231
1232 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1233
1234 return cctx;
1235}
1236
1237static void
1238cctx_destroy (coro_cctx *cctx)
1239{
1240 if (!cctx)
1241 return;
1242
1243 --cctx_count;
1244 coro_destroy (&cctx->cctx);
1245
1246 /* coro_transfer creates new, empty cctx's */
1247 if (cctx->sptr)
1248 {
1249 #if CORO_USE_VALGRIND
1250 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1251 #endif
1252
1253#if HAVE_MMAP
1254 if (cctx->flags & CC_MAPPED)
1255 munmap (cctx->sptr, cctx->ssize);
1256 else
1257#endif
1258 Safefree (cctx->sptr);
1259 }
1260
1261 Safefree (cctx);
1262}
1263
1264/* wether this cctx should be destructed */
1265#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1266
1267static coro_cctx *
1268cctx_get (pTHX)
1269{
1270 while (expect_true (cctx_first))
1271 {
1272 coro_cctx *cctx = cctx_first;
1273 cctx_first = cctx->next;
1274 --cctx_idle;
1275
1276 if (expect_true (!CCTX_EXPIRED (cctx)))
1277 return cctx;
1278
1279 cctx_destroy (cctx);
1280 }
1281
1282 return cctx_new_run ();
1283}
1284
1285static void
1286cctx_put (coro_cctx *cctx)
1287{
1288 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1289
1290 /* free another cctx if overlimit */
1291 if (expect_false (cctx_idle >= cctx_max_idle))
1292 {
1293 coro_cctx *first = cctx_first;
1294 cctx_first = first->next;
1295 --cctx_idle;
1296
1297 cctx_destroy (first);
1298 }
1299
1300 ++cctx_idle;
1301 cctx->next = cctx_first;
1302 cctx_first = cctx;
1303}
1304
1305/** coroutine switching *****************************************************/
1306
1307static void
1308transfer_check (pTHX_ struct coro *prev, struct coro *next)
1309{
1310 if (expect_true (prev != next))
1311 {
1312 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1313 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1314
1315 if (expect_false (next->flags & CF_RUNNING))
1316 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1317
1318 if (expect_false (next->flags & CF_DESTROYED))
1319 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1320
1321#if !PERL_VERSION_ATLEAST (5,10,0)
1322 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1324#endif
1325 }
1326}
1327
1328/* always use the TRANSFER macro */
586static void NOINLINE 1329static void NOINLINE
587prepare_cctx (coro_stack *cctx)
588{
589 dSP;
590 UNOP myop;
591
592 Zero (&myop, 1, UNOP);
593 myop.op_next = PL_op;
594 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
595
596 PUSHMARK(SP);
597 EXTEND (SP, 2);
598 PUSHs (newSViv (PTR2IV (cctx)));
599 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
600 PUTBACK;
601 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
602 SPAGAIN;
603}
604
605static void
606coro_run (void *arg)
607{
608 /*
609 * this is a _very_ stripped down perl interpreter ;)
610 */
611 UNLOCK;
612
613 PL_top_env = &PL_start_env;
614 prepare_cctx ((coro_stack *)arg);
615
616 /* somebody will hit me for both perl_run and PL_restartop */
617 perl_run (PERL_GET_CONTEXT);
618
619 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
620 abort ();
621}
622
623static coro_stack *
624stack_new ()
625{
626 coro_stack *stack;
627
628 New (0, stack, 1, coro_stack);
629
630#if HAVE_MMAP
631
632 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
633 /* mmap suppsedly does allocate-on-write for us */
634 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
635
636 if (stack->sptr == (void *)-1)
637 {
638 perror ("FATAL: unable to mmap stack for coroutine");
639 _exit (EXIT_FAILURE);
640 }
641
642# if STACKGUARD
643 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
644# endif
645
646#else
647
648 stack->ssize = STACKSIZE * (long)sizeof (long);
649 New (0, stack->sptr, STACKSIZE, long);
650
651 if (!stack->sptr)
652 {
653 perror (stderr, "FATAL: unable to malloc stack for coroutine");
654 _exit (EXIT_FAILURE);
655 }
656
657#endif
658
659 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
660
661 return stack;
662}
663
664static void
665stack_free (coro_stack *stack)
666{
667 if (!stack)
668 return;
669
670#if HAVE_MMAP
671 munmap (stack->sptr, stack->ssize);
672#else
673 Safefree (stack->sptr);
674#endif
675
676 Safefree (stack);
677}
678
679static coro_stack *stack_first;
680
681static coro_stack *
682stack_get ()
683{
684 coro_stack *stack;
685
686 if (stack_first)
687 {
688 stack = stack_first;
689 stack_first = stack->next;
690 }
691 else
692 {
693 stack = stack_new ();
694 PL_op = PL_op->op_next;
695 }
696
697 return stack;
698}
699
700static void
701stack_put (coro_stack *stack)
702{
703 stack->next = stack_first;
704 stack_first = stack;
705}
706
707/* never call directly, always through the coro_state_transfer global variable */
708static void NOINLINE
709transfer (struct coro *prev, struct coro *next, int flags) 1330transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
710{ 1331{
711 dSTACKLEVEL; 1332 dSTACKLEVEL;
712 1333
713 /* sometimes transfer is only called to set idle_sp */ 1334 /* sometimes transfer is only called to set idle_sp */
714 if (flags == TRANSFER_SET_STACKLEVEL) 1335 if (expect_false (!next))
715 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1336 {
716 else if (prev != next) 1337 ((coro_cctx *)prev)->idle_sp = stacklevel;
1338 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
717 { 1339 }
1340 else if (expect_true (prev != next))
1341 {
718 coro_stack *prev__stack; 1342 coro_cctx *prev__cctx;
1343
1344 if (expect_false (prev->flags & CF_NEW))
1345 {
1346 /* create a new empty/source context */
1347 prev->cctx = cctx_new_empty ();
1348 prev->flags &= ~CF_NEW;
1349 prev->flags |= CF_RUNNING;
1350 }
1351
1352 prev->flags &= ~CF_RUNNING;
1353 next->flags |= CF_RUNNING;
719 1354
720 LOCK; 1355 LOCK;
721 1356
722 if (next->mainstack) 1357 /* first get rid of the old state */
1358 save_perl (aTHX_ prev);
1359
1360 if (expect_false (next->flags & CF_NEW))
723 { 1361 {
724 /* coroutine already started */ 1362 /* need to start coroutine */
725 SAVE (prev, flags); 1363 next->flags &= ~CF_NEW;
726 LOAD (next); 1364 /* setup coroutine call */
1365 coro_setup (aTHX_ next);
727 } 1366 }
728 else 1367 else
1368 load_perl (aTHX_ next);
1369
1370 prev__cctx = prev->cctx;
1371
1372 /* possibly untie and reuse the cctx */
1373 if (expect_true (
1374 prev__cctx->idle_sp == stacklevel
1375 && !(prev__cctx->flags & CC_TRACE)
1376 && !force_cctx
1377 ))
729 { 1378 {
730 /* need to start coroutine */ 1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
731 /* first get rid of the old state */ 1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
732 SAVE (prev, -1); 1381
733 /* setup coroutine call */ 1382 prev->cctx = 0;
734 setup_coro (next); 1383
735 /* need a stack */ 1384 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
736 next->stack = 0; 1385 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1386 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1387 if (!next->cctx)
1388 next->cctx = cctx_get (aTHX);
1389
1390 cctx_put (prev__cctx);
737 } 1391 }
738 1392
739 if (!prev->stack) 1393 ++next->usecount;
740 /* create a new empty context */
741 Newz (0, prev->stack, 1, coro_stack);
742 1394
743 prev__stack = prev->stack; 1395 if (expect_true (!next->cctx))
1396 next->cctx = cctx_get (aTHX);
744 1397
745 /* possibly "free" the stack */ 1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
746 if (prev__stack->idle_sp == STACKLEVEL) 1399 transfer_next = next;
1400
1401 if (expect_false (prev__cctx != next->cctx))
747 { 1402 {
748 stack_put (prev__stack); 1403 prev__cctx->top_env = PL_top_env;
749 prev->stack = 0; 1404 PL_top_env = next->cctx->top_env;
1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
750 } 1406 }
751 1407
752 if (!next->stack) 1408 transfer_tail (aTHX);
753 next->stack = stack_get (); 1409 }
1410}
754 1411
755 if (prev__stack != next->stack) 1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
756 { 1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
757 prev__stack->top_env = PL_top_env;
758 PL_top_env = next->stack->top_env;
759 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
760 }
761 1414
762 free_coro_mortal (); 1415/** high level stuff ********************************************************/
763 1416
1417static int
1418coro_state_destroy (pTHX_ struct coro *coro)
1419{
1420 if (coro->flags & CF_DESTROYED)
1421 return 0;
1422
1423 coro->flags |= CF_DESTROYED;
1424
1425 if (coro->flags & CF_READY)
1426 {
1427 /* reduce nready, as destroying a ready coro effectively unreadies it */
1428 /* alternative: look through all ready queues and remove the coro */
1429 LOCK;
1430 --coro_nready;
764 UNLOCK; 1431 UNLOCK;
765 } 1432 }
766} 1433 else
767 1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768struct transfer_args
769{
770 struct coro *prev, *next;
771 int flags;
772};
773
774#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
775
776static void
777coro_state_destroy (struct coro *coro)
778{
779 if (coro->refcnt--)
780 return;
781 1435
782 if (coro->mainstack && coro->mainstack != main_mainstack) 1436 if (coro->mainstack && coro->mainstack != main_mainstack)
783 { 1437 {
784 struct coro temp; 1438 struct coro temp;
785 1439
786 SAVE ((&temp), TRANSFER_SAVE_ALL); 1440 if (coro->flags & CF_RUNNING)
787 LOAD (coro); 1441 croak ("FATAL: tried to destroy currently running coroutine");
788 1442
789 destroy_stacks (); 1443 save_perl (aTHX_ &temp);
1444 load_perl (aTHX_ coro);
790 1445
791 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1446 coro_destruct (aTHX_ coro);
792 1447
1448 load_perl (aTHX_ &temp);
1449
793 coro->mainstack = 0; 1450 coro->slot = 0;
794 } 1451 }
795 1452
796 stack_free (coro->stack); 1453 cctx_destroy (coro->cctx);
797 SvREFCNT_dec (coro->args); 1454 SvREFCNT_dec (coro->args);
798 Safefree (coro); 1455
1456 if (coro->next) coro->next->prev = coro->prev;
1457 if (coro->prev) coro->prev->next = coro->next;
1458 if (coro == coro_first) coro_first = coro->next;
1459
1460 return 1;
799} 1461}
800 1462
801static int 1463static int
802coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1464coro_state_free (pTHX_ SV *sv, MAGIC *mg)
803{ 1465{
804 struct coro *coro = (struct coro *)mg->mg_ptr; 1466 struct coro *coro = (struct coro *)mg->mg_ptr;
805 mg->mg_ptr = 0; 1467 mg->mg_ptr = 0;
806 1468
1469 coro->hv = 0;
1470
1471 if (--coro->refcnt < 0)
1472 {
807 coro_state_destroy (coro); 1473 coro_state_destroy (aTHX_ coro);
1474 Safefree (coro);
1475 }
808 1476
809 return 0; 1477 return 0;
810} 1478}
811 1479
812static int 1480static int
… …
819 return 0; 1487 return 0;
820} 1488}
821 1489
822static MGVTBL coro_state_vtbl = { 1490static MGVTBL coro_state_vtbl = {
823 0, 0, 0, 0, 1491 0, 0, 0, 0,
824 coro_state_clear, 1492 coro_state_free,
825 0, 1493 0,
826#ifdef MGf_DUP 1494#ifdef MGf_DUP
827 coro_state_dup, 1495 coro_state_dup,
1496#else
1497# define MGf_DUP 0
828#endif 1498#endif
829}; 1499};
830 1500
831static struct coro *
832SvSTATE (SV *coro)
833{
834 HV *stash;
835 MAGIC *mg;
836
837 if (SvROK (coro))
838 coro = SvRV (coro);
839
840 stash = SvSTASH (coro);
841 if (stash != coro_stash && stash != coro_state_stash)
842 {
843 /* very slow, but rare, check */
844 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845 croak ("Coro::State object required");
846 }
847
848 mg = SvMAGIC (coro);
849 assert (mg->mg_type == PERL_MAGIC_ext);
850 return (struct coro *)mg->mg_ptr;
851}
852
853static void 1501static void
854prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1502prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
855{ 1503{
856 ta->prev = SvSTATE (prev); 1504 ta->prev = SvSTATE (prev_sv);
857 ta->next = SvSTATE (next); 1505 ta->next = SvSTATE (next_sv);
858 ta->flags = flags; 1506 TRANSFER_CHECK (*ta);
859} 1507}
860 1508
861static void 1509static void
862api_transfer (SV *prev, SV *next, int flags) 1510api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
863{ 1511{
864 dTHX;
865 struct transfer_args ta; 1512 struct transfer_args ta;
866 1513
867 prepare_transfer (&ta, prev, next, flags); 1514 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868 TRANSFER (ta); 1515 TRANSFER (ta, 1);
869} 1516}
870 1517
871/** Coro ********************************************************************/ 1518/** Coro ********************************************************************/
872 1519
873#define PRIO_MAX 3
874#define PRIO_HIGH 1
875#define PRIO_NORMAL 0
876#define PRIO_LOW -1
877#define PRIO_IDLE -3
878#define PRIO_MIN -4
879
880/* for Coro.pm */
881static GV *coro_current, *coro_idle;
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883static int coro_nready;
884
885static void 1520static void
886coro_enq (SV *sv) 1521coro_enq (pTHX_ SV *coro_sv)
1522{
1523 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1524}
1525
1526static SV *
1527coro_deq (pTHX)
887{ 1528{
888 int prio; 1529 int prio;
889 1530
890 if (SvTYPE (sv) != SVt_PVHV) 1531 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
891 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1532 if (AvFILLp (coro_ready [prio]) >= 0)
1533 return av_shift (coro_ready [prio]);
892 1534
893 prio = SvSTATE (sv)->prio; 1535 return 0;
1536}
894 1537
895 av_push (coro_ready [prio - PRIO_MIN], sv); 1538static int
1539api_ready (pTHX_ SV *coro_sv)
1540{
1541 struct coro *coro;
1542 SV *sv_hook;
1543 void (*xs_hook)(void);
1544
1545 if (SvROK (coro_sv))
1546 coro_sv = SvRV (coro_sv);
1547
1548 coro = SvSTATE (coro_sv);
1549
1550 if (coro->flags & CF_READY)
1551 return 0;
1552
1553 coro->flags |= CF_READY;
1554
1555 LOCK;
1556
1557 sv_hook = coro_nready ? 0 : coro_readyhook;
1558 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1559
1560 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
896 coro_nready++; 1561 ++coro_nready;
1562
1563 UNLOCK;
1564
1565 if (sv_hook)
1566 {
1567 dSP;
1568
1569 ENTER;
1570 SAVETMPS;
1571
1572 PUSHMARK (SP);
1573 PUTBACK;
1574 call_sv (sv_hook, G_DISCARD);
1575 SPAGAIN;
1576
1577 FREETMPS;
1578 LEAVE;
1579 }
1580
1581 if (xs_hook)
1582 xs_hook ();
1583
1584 return 1;
1585}
1586
1587static int
1588api_is_ready (pTHX_ SV *coro_sv)
1589{
1590 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1591}
1592
1593INLINE void
1594prepare_schedule (pTHX_ struct transfer_args *ta)
1595{
1596 SV *prev_sv, *next_sv;
1597
1598 for (;;)
1599 {
1600 LOCK;
1601 next_sv = coro_deq (aTHX);
1602
1603 /* nothing to schedule: call the idle handler */
1604 if (expect_false (!next_sv))
1605 {
1606 dSP;
1607 UNLOCK;
1608
1609 ENTER;
1610 SAVETMPS;
1611
1612 PUSHMARK (SP);
1613 PUTBACK;
1614 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1615 SPAGAIN;
1616
1617 FREETMPS;
1618 LEAVE;
1619 continue;
1620 }
1621
1622 ta->next = SvSTATE (next_sv);
1623
1624 /* cannot transfer to destroyed coros, skip and look for next */
1625 if (expect_false (ta->next->flags & CF_DESTROYED))
1626 {
1627 UNLOCK;
1628 SvREFCNT_dec (next_sv);
1629 /* coro_nready has already been taken care of by destroy */
1630 continue;
1631 }
1632
1633 --coro_nready;
1634 UNLOCK;
1635 break;
1636 }
1637
1638 /* free this only after the transfer */
1639 prev_sv = SvRV (coro_current);
1640 ta->prev = SvSTATE (prev_sv);
1641 TRANSFER_CHECK (*ta);
1642 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1643 ta->next->flags &= ~CF_READY;
1644 SvRV_set (coro_current, next_sv);
1645
1646 LOCK;
1647 free_coro_mortal (aTHX);
1648 coro_mortal = prev_sv;
1649 UNLOCK;
1650}
1651
1652INLINE void
1653prepare_cede (pTHX_ struct transfer_args *ta)
1654{
1655 api_ready (aTHX_ coro_current);
1656 prepare_schedule (aTHX_ ta);
1657}
1658
1659static void
1660prepare_cede_notself (pTHX_ struct transfer_args *ta)
1661{
1662 SV *prev = SvRV (coro_current);
1663
1664 if (coro_nready)
1665 {
1666 prepare_schedule (aTHX_ ta);
1667 api_ready (aTHX_ prev);
1668 }
1669 else
1670 ta->prev = ta->next = SvSTATE (prev);
1671}
1672
1673static void
1674api_schedule (pTHX)
1675{
1676 struct transfer_args ta;
1677
1678 prepare_schedule (aTHX_ &ta);
1679 TRANSFER (ta, 1);
1680}
1681
1682static int
1683api_cede (pTHX)
1684{
1685 struct transfer_args ta;
1686
1687 prepare_cede (aTHX_ &ta);
1688
1689 if (expect_true (ta.prev != ta.next))
1690 {
1691 TRANSFER (ta, 1);
1692 return 1;
1693 }
1694 else
1695 return 0;
1696}
1697
1698static int
1699api_cede_notself (pTHX)
1700{
1701 if (coro_nready)
1702 {
1703 struct transfer_args ta;
1704
1705 prepare_cede_notself (aTHX_ &ta);
1706 TRANSFER (ta, 1);
1707 return 1;
1708 }
1709 else
1710 return 0;
1711}
1712
1713static void
1714api_trace (pTHX_ SV *coro_sv, int flags)
1715{
1716 struct coro *coro = SvSTATE (coro_sv);
1717
1718 if (flags & CC_TRACE)
1719 {
1720 if (!coro->cctx)
1721 coro->cctx = cctx_new_run ();
1722 else if (!(coro->cctx->flags & CC_TRACE))
1723 croak ("cannot enable tracing on coroutine with custom stack");
1724
1725 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1726 }
1727 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1728 {
1729 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1730
1731 if (coro->flags & CF_RUNNING)
1732 PL_runops = RUNOPS_DEFAULT;
1733 else
1734 coro->slot->runops = RUNOPS_DEFAULT;
1735 }
1736}
1737
1738#if 0
1739static int
1740coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1741{
1742 AV *padlist;
1743 AV *av = (AV *)mg->mg_obj;
1744
1745 abort ();
1746
1747 return 0;
1748}
1749
1750static MGVTBL coro_gensub_vtbl = {
1751 0, 0, 0, 0,
1752 coro_gensub_free
1753};
1754#endif
1755
1756/*****************************************************************************/
1757/* PerlIO::cede */
1758
1759typedef struct
1760{
1761 PerlIOBuf base;
1762 NV next, every;
1763} PerlIOCede;
1764
1765static IV
1766PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1767{
1768 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1769
1770 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1771 self->next = nvtime () + self->every;
1772
1773 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
897} 1774}
898 1775
899static SV * 1776static SV *
900coro_deq (int min_prio) 1777PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
901{ 1778{
902 int prio = PRIO_MAX - PRIO_MIN; 1779 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
903 1780
904 min_prio -= PRIO_MIN; 1781 return newSVnv (self->every);
905 if (min_prio < 0) 1782}
906 min_prio = 0;
907 1783
908 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1784static IV
909 if (AvFILLp (coro_ready [prio]) >= 0) 1785PerlIOCede_flush (pTHX_ PerlIO *f)
1786{
1787 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1788 double now = nvtime ();
1789
1790 if (now >= self->next)
910 { 1791 {
911 coro_nready--; 1792 api_cede (aTHX);
912 return av_shift (coro_ready [prio]); 1793 self->next = now + self->every;
913 } 1794 }
914 1795
915 return 0; 1796 return PerlIOBuf_flush (aTHX_ f);
1797}
1798
1799static PerlIO_funcs PerlIO_cede =
1800{
1801 sizeof(PerlIO_funcs),
1802 "cede",
1803 sizeof(PerlIOCede),
1804 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1805 PerlIOCede_pushed,
1806 PerlIOBuf_popped,
1807 PerlIOBuf_open,
1808 PerlIOBase_binmode,
1809 PerlIOCede_getarg,
1810 PerlIOBase_fileno,
1811 PerlIOBuf_dup,
1812 PerlIOBuf_read,
1813 PerlIOBuf_unread,
1814 PerlIOBuf_write,
1815 PerlIOBuf_seek,
1816 PerlIOBuf_tell,
1817 PerlIOBuf_close,
1818 PerlIOCede_flush,
1819 PerlIOBuf_fill,
1820 PerlIOBase_eof,
1821 PerlIOBase_error,
1822 PerlIOBase_clearerr,
1823 PerlIOBase_setlinebuf,
1824 PerlIOBuf_get_base,
1825 PerlIOBuf_bufsiz,
1826 PerlIOBuf_get_ptr,
1827 PerlIOBuf_get_cnt,
1828 PerlIOBuf_set_ptrcnt,
1829};
1830
1831/*****************************************************************************/
1832
1833static const CV *slf_cv; /* for quick consistency check */
1834
1835static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1836static SV *slf_arg0;
1837static SV *slf_arg1;
1838
1839/* this restores the stack in the case we patched the entersub, to */
1840/* recreate the stack frame as perl will on following calls */
1841/* since entersub cleared the stack */
1842static OP *
1843pp_restore (pTHX)
1844{
1845 dSP;
1846
1847 PUSHMARK (SP);
1848
1849 EXTEND (SP, 3);
1850 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1851 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1852 PUSHs ((SV *)CvGV (slf_cv));
1853
1854 RETURNOP (slf_restore.op_first);
1855}
1856
1857#define OPpENTERSUB_SLF 15 /* the part of op_private entersub hopefully doesn't use */
1858
1859enum {
1860 CORO_SLF_CUSTOM = 0,
1861 CORO_SLF_SET_STACKLEVEL = 1,
1862 CORO_SLF_TRANSFER = 2
1863};
1864
1865/* declare prototype */
1866XS(XS_Coro__State__set_stacklevel);
1867
1868/*
1869 * these not obviously related functions are all rolled into one
1870 * function to increase chances that they all will call transfer with the same
1871 * stack offset
1872 * SLF stands for "schedule-like-function".
1873 */
1874static OP *
1875pp_slf (pTHX)
1876{
1877 dSP;
1878 struct transfer_args ta;
1879 SV **arg = PL_stack_base + TOPMARK + 1;
1880 int items = SP - arg; /* args without function object */
1881 int ix = PL_op->op_private & OPpENTERSUB_SLF;
1882 struct CoroSLF *slf = 0;
1883 SV *gv = *sp;
1884
1885 /* do a quick consistency check on the "function" object, and if it isn't */
1886 /* for us, divert to the real entersub */
1887 if (SvTYPE (gv) != SVt_PVGV || CvXSUB (GvCV (gv)) != XS_Coro__State__set_stacklevel)
1888 return PL_ppaddr[OP_ENTERSUB](aTHX);
1889
1890 /* pop args */
1891 SP = PL_stack_base + POPMARK;
1892
1893 if (!(PL_op->op_flags & OPf_STACKED))
1894 {
1895 /* ampersand-form of call, use @_ instead of stack */
1896 AV *av = GvAV (PL_defgv);
1897 arg = AvARRAY (av);
1898 items = AvFILLp (av) + 1;
1899 }
1900
1901 PUTBACK;
1902
1903 if (!ix)
1904 {
1905 slf = (struct CoroSLF *)CvXSUBANY (GvCV (gv)).any_ptr;
1906 ix = slf->prepare (aTHX_ arg, items);
1907 }
1908
1909 switch (ix)
1910 {
1911 case CORO_SLF_SET_STACKLEVEL:
1912 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1913 break;
1914
1915 case CORO_SLF_TRANSFER:
1916 if (items != 2)
1917 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1918
1919 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1920 break;
1921
1922 case CORO_SLF_SCHEDULE:
1923 prepare_schedule (aTHX_ &ta);
1924 break;
1925
1926 case CORO_SLF_CEDE:
1927 prepare_cede (aTHX_ &ta);
1928 break;
1929
1930 case CORO_SLF_CEDE_NOTSELF:
1931 prepare_cede_notself (aTHX_ &ta);
1932 break;
1933
1934 default:
1935 abort ();
1936 }
1937
1938 do
1939 TRANSFER (ta, 0);
1940 while (slf && slf->check (aTHX));
1941
1942 SPAGAIN;
1943
1944 PUTBACK;
1945 SLF_TAIL;
1946 SPAGAIN;
1947 RETURN;
916} 1948}
917 1949
918static void 1950static void
919api_ready (SV *coro) 1951coro_slf_patch (pTHX_ CV *cv, int ix, SV **args, int items)
920{ 1952{
921 dTHX; 1953 assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
922 1954
923 if (SvROK (coro)) 1955 assert (("FATAL: SLF call with illegal CV value", CvGV (cv)));
924 coro = SvRV (coro); 1956 slf_cv = cv;
925 1957
926 LOCK; 1958 /* we patch the op, and then re-run the whole call */
927 coro_enq (SvREFCNT_inc (coro)); 1959 /* we have to put the same argument on the stack for this to work */
928 UNLOCK; 1960 /* and this will be done by pp_restore */
1961 slf_restore.op_next = (OP *)&slf_restore;
1962 slf_restore.op_type = OP_NULL;
1963 slf_restore.op_ppaddr = pp_restore;
1964 slf_restore.op_first = PL_op;
1965
1966 slf_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1967 slf_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1968
1969 PL_op->op_ppaddr = pp_slf;
1970 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SLF | ix; /* we potentially share our private flags with entersub */
1971
1972 PL_op = (OP *)&slf_restore;
929} 1973}
930 1974
931static void 1975static void
932prepare_schedule (struct transfer_args *ta) 1976api_execute_slf (pTHX_ CV *cv, const struct CoroSLF *slf, SV **arg, int items)
933{ 1977{
934 SV *current, *prev, *next; 1978 CvXSUBANY (cv).any_ptr = (void *)slf;
935 1979 coro_slf_patch (aTHX_ cv, CORO_SLF_CUSTOM, arg, items);
936 current = GvSV (coro_current);
937
938 for (;;)
939 {
940 LOCK;
941 next = coro_deq (PRIO_MIN);
942 UNLOCK;
943
944 if (next)
945 break;
946
947 {
948 dSP;
949
950 ENTER;
951 SAVETMPS;
952
953 PUSHMARK (SP);
954 PUTBACK;
955 call_sv (GvSV (coro_idle), G_DISCARD);
956
957 FREETMPS;
958 LEAVE;
959 }
960 }
961
962 prev = SvRV (current);
963 SvRV (current) = next;
964
965 /* free this only after the transfer */
966 LOCK;
967 free_coro_mortal ();
968 UNLOCK;
969 coro_mortal = prev;
970
971 ta->prev = SvSTATE (prev);
972 ta->next = SvSTATE (next);
973 ta->flags = TRANSFER_SAVE_ALL;
974} 1980}
975 1981
976static void
977prepare_cede (struct transfer_args *ta)
978{
979 LOCK;
980 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981 UNLOCK;
982
983 prepare_schedule (ta);
984}
985
986static void
987api_schedule (void)
988{
989 dTHX;
990 struct transfer_args ta;
991
992 prepare_schedule (&ta);
993 TRANSFER (ta);
994}
995
996static void
997api_cede (void)
998{
999 dTHX;
1000 struct transfer_args ta;
1001
1002 prepare_cede (&ta);
1003 TRANSFER (ta);
1004}
1005
1006MODULE = Coro::State PACKAGE = Coro::State 1982MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1007 1983
1008PROTOTYPES: DISABLE 1984PROTOTYPES: DISABLE
1009 1985
1010BOOT: 1986BOOT:
1011{ 1987{
1012#ifdef USE_ITHREADS 1988#ifdef USE_ITHREADS
1013 MUTEX_INIT (&coro_mutex); 1989 MUTEX_INIT (&coro_lock);
1990# if CORO_PTHREAD
1991 coro_thx = PERL_GET_CONTEXT;
1992# endif
1014#endif 1993#endif
1015 BOOT_PAGESIZE; 1994 BOOT_PAGESIZE;
1016 1995
1996 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1997 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1998
1999 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2000 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2001 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2002
2003 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2004 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2005 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2006
1017 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2007 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018 2008
1019 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2009 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1020 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2010 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1021 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2011 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2012 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1022 2013
1023 main_mainstack = PL_mainstack; 2014 main_mainstack = PL_mainstack;
2015 main_top_env = PL_top_env;
1024 2016
2017 while (main_top_env->je_prev)
2018 main_top_env = main_top_env->je_prev;
2019
1025 coroapi.ver = CORO_API_VERSION; 2020 coroapi.ver = CORO_API_VERSION;
2021 coroapi.rev = CORO_API_REVISION;
1026 coroapi.transfer = api_transfer; 2022 coroapi.transfer = api_transfer;
2023 coroapi.execute_slf = api_execute_slf;
2024
2025 {
2026 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2027
2028 if (!svp) croak ("Time::HiRes is required");
2029 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2030
2031 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2032 }
1027 2033
1028 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2034 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1029} 2035}
1030 2036
1031SV * 2037SV *
1032new (char *klass, ...) 2038new (char *klass, ...)
1033 CODE: 2039 CODE:
1034{ 2040{
1035 struct coro *coro; 2041 struct coro *coro;
2042 MAGIC *mg;
1036 HV *hv; 2043 HV *hv;
1037 int i; 2044 int i;
1038 2045
1039 Newz (0, coro, 1, struct coro); 2046 Newz (0, coro, 1, struct coro);
1040 coro->args = newAV (); 2047 coro->args = newAV ();
2048 coro->flags = CF_NEW;
1041 2049
2050 if (coro_first) coro_first->prev = coro;
2051 coro->next = coro_first;
2052 coro_first = coro;
2053
1042 hv = newHV (); 2054 coro->hv = hv = newHV ();
1043 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2055 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2056 mg->mg_flags |= MGf_DUP;
1044 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2057 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1045 2058
2059 av_extend (coro->args, items - 1);
1046 for (i = 1; i < items; i++) 2060 for (i = 1; i < items; i++)
1047 av_push (coro->args, newSVsv (ST (i))); 2061 av_push (coro->args, newSVsv (ST (i)));
1048
1049 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1050 /*coro->stack = 0;*/
1051} 2062}
1052 OUTPUT: 2063 OUTPUT:
1053 RETVAL 2064 RETVAL
1054 2065
1055void 2066void
1056_set_stacklevel (...) 2067_set_stacklevel (...)
1057 ALIAS: 2068 ALIAS:
2069 _set_stacklevel = CORO_SLF_SET_STACKLEVEL
1058 Coro::State::transfer = 1 2070 Coro::State::transfer = CORO_SLF_TRANSFER
1059 Coro::schedule = 2 2071 Coro::schedule = CORO_SLF_SCHEDULE
1060 Coro::cede = 3 2072 Coro::cede = CORO_SLF_CEDE
1061 Coro::Cont::yield = 4 2073 Coro::cede_notself = CORO_SLF_CEDE_NOTSELF
1062 CODE: 2074 CODE:
1063{ 2075 coro_slf_patch (aTHX_ cv, ix, &ST (0), items);
1064 struct transfer_args ta;
1065 2076
1066 switch (ix) 2077bool
1067 { 2078_destroy (SV *coro_sv)
1068 case 0: 2079 CODE:
1069 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 2080 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1070 ta.next = 0; 2081 OUTPUT:
1071 ta.flags = TRANSFER_SET_STACKLEVEL; 2082 RETVAL
1072 break;
1073
1074 case 1:
1075 if (items != 3)
1076 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1077
1078 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1079 break;
1080
1081 case 2:
1082 prepare_schedule (&ta);
1083 break;
1084
1085 case 3:
1086 prepare_cede (&ta);
1087 break;
1088
1089 case 4:
1090 {
1091 SV *yieldstack;
1092 SV *sv;
1093 AV *defav = GvAV (PL_defgv);
1094
1095 yieldstack = *hv_fetch (
1096 (HV *)SvRV (GvSV (coro_current)),
1097 "yieldstack", sizeof ("yieldstack") - 1,
1098 0
1099 );
1100
1101 /* set up @_ -- ugly */
1102 av_clear (defav);
1103 av_fill (defav, items - 1);
1104 while (items--)
1105 av_store (defav, items, SvREFCNT_inc (ST(items)));
1106
1107 sv = av_pop ((AV *)SvRV (yieldstack));
1108 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1109 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1110 ta.flags = 0;
1111 SvREFCNT_dec (sv);
1112 }
1113 break;
1114
1115 }
1116
1117 TRANSFER (ta);
1118}
1119 2083
1120void 2084void
1121_clone_state_from (SV *dst, SV *src)
1122 CODE:
1123{
1124 struct coro *coro_src = SvSTATE (src);
1125
1126 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1127
1128 ++coro_src->refcnt;
1129 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1130}
1131
1132void
1133_exit (code) 2085_exit (int code)
1134 int code
1135 PROTOTYPE: $ 2086 PROTOTYPE: $
1136 CODE: 2087 CODE:
1137 _exit (code); 2088 _exit (code);
1138 2089
2090int
2091cctx_stacksize (int new_stacksize = 0)
2092 CODE:
2093 RETVAL = cctx_stacksize;
2094 if (new_stacksize)
2095 {
2096 cctx_stacksize = new_stacksize;
2097 ++cctx_gen;
2098 }
2099 OUTPUT:
2100 RETVAL
2101
2102int
2103cctx_max_idle (int max_idle = 0)
2104 CODE:
2105 RETVAL = cctx_max_idle;
2106 if (max_idle > 1)
2107 cctx_max_idle = max_idle;
2108 OUTPUT:
2109 RETVAL
2110
2111int
2112cctx_count ()
2113 CODE:
2114 RETVAL = cctx_count;
2115 OUTPUT:
2116 RETVAL
2117
2118int
2119cctx_idle ()
2120 CODE:
2121 RETVAL = cctx_idle;
2122 OUTPUT:
2123 RETVAL
2124
2125void
2126list ()
2127 PPCODE:
2128{
2129 struct coro *coro;
2130 for (coro = coro_first; coro; coro = coro->next)
2131 if (coro->hv)
2132 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2133}
2134
2135void
2136call (Coro::State coro, SV *coderef)
2137 ALIAS:
2138 eval = 1
2139 CODE:
2140{
2141 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2142 {
2143 struct coro temp;
2144
2145 if (!(coro->flags & CF_RUNNING))
2146 {
2147 PUTBACK;
2148 save_perl (aTHX_ &temp);
2149 load_perl (aTHX_ coro);
2150 }
2151
2152 {
2153 dSP;
2154 ENTER;
2155 SAVETMPS;
2156 PUTBACK;
2157 PUSHSTACK;
2158 PUSHMARK (SP);
2159
2160 if (ix)
2161 eval_sv (coderef, 0);
2162 else
2163 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2164
2165 POPSTACK;
2166 SPAGAIN;
2167 FREETMPS;
2168 LEAVE;
2169 PUTBACK;
2170 }
2171
2172 if (!(coro->flags & CF_RUNNING))
2173 {
2174 save_perl (aTHX_ coro);
2175 load_perl (aTHX_ &temp);
2176 SPAGAIN;
2177 }
2178 }
2179}
2180
2181SV *
2182is_ready (Coro::State coro)
2183 PROTOTYPE: $
2184 ALIAS:
2185 is_ready = CF_READY
2186 is_running = CF_RUNNING
2187 is_new = CF_NEW
2188 is_destroyed = CF_DESTROYED
2189 CODE:
2190 RETVAL = boolSV (coro->flags & ix);
2191 OUTPUT:
2192 RETVAL
2193
2194void
2195throw (Coro::State self, SV *throw = &PL_sv_undef)
2196 PROTOTYPE: $;$
2197 CODE:
2198 SvREFCNT_dec (self->throw);
2199 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2200
2201void
2202api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2203 C_ARGS: aTHX_ coro, flags
2204
2205SV *
2206has_cctx (Coro::State coro)
2207 PROTOTYPE: $
2208 CODE:
2209 RETVAL = boolSV (!!coro->cctx);
2210 OUTPUT:
2211 RETVAL
2212
2213int
2214is_traced (Coro::State coro)
2215 PROTOTYPE: $
2216 CODE:
2217 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2218 OUTPUT:
2219 RETVAL
2220
2221UV
2222rss (Coro::State coro)
2223 PROTOTYPE: $
2224 ALIAS:
2225 usecount = 1
2226 CODE:
2227 switch (ix)
2228 {
2229 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2230 case 1: RETVAL = coro->usecount; break;
2231 }
2232 OUTPUT:
2233 RETVAL
2234
2235void
2236force_cctx ()
2237 CODE:
2238 struct coro *coro = SvSTATE (coro_current);
2239 coro->cctx->idle_sp = 0;
2240
2241void
2242swap_defsv (Coro::State self)
2243 PROTOTYPE: $
2244 ALIAS:
2245 swap_defav = 1
2246 CODE:
2247 if (!self->slot)
2248 croak ("cannot swap state with coroutine that has no saved state");
2249 else
2250 {
2251 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2252 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2253
2254 SV *tmp = *src; *src = *dst; *dst = tmp;
2255 }
2256
1139MODULE = Coro::State PACKAGE = Coro 2257MODULE = Coro::State PACKAGE = Coro
1140 2258
1141BOOT: 2259BOOT:
1142{ 2260{
1143 int i; 2261 int i;
1144 2262
2263 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2264 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2265 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2266
2267 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2268 SvREADONLY_on (coro_current);
2269
1145 coro_stash = gv_stashpv ("Coro", TRUE); 2270 coro_stash = gv_stashpv ("Coro", TRUE);
1146 2271
1147 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2272 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1148 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2273 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1149 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2274 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1150 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2275 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1151 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2276 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1152 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2277 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1153 2278
1154 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1155 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1156
1157 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2279 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158 coro_ready[i] = newAV (); 2280 coro_ready[i] = newAV ();
1159 2281
1160 { 2282 {
1161 SV *sv = perl_get_sv("Coro::API", 1); 2283 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1162 2284
1163 coroapi.schedule = api_schedule; 2285 coroapi.schedule = api_schedule;
1164 coroapi.cede = api_cede; 2286 coroapi.cede = api_cede;
2287 coroapi.cede_notself = api_cede_notself;
1165 coroapi.ready = api_ready; 2288 coroapi.ready = api_ready;
2289 coroapi.is_ready = api_is_ready;
1166 coroapi.nready = &coro_nready; 2290 coroapi.nready = coro_nready;
1167 coroapi.current = coro_current; 2291 coroapi.current = coro_current;
1168 2292
1169 GCoroAPI = &coroapi; 2293 GCoroAPI = &coroapi;
1170 sv_setiv (sv, (IV)&coroapi); 2294 sv_setiv (sv, (IV)&coroapi);
1171 SvREADONLY_on (sv); 2295 SvREADONLY_on (sv);
1172 } 2296 }
1173} 2297}
2298
2299void
2300_set_current (SV *current)
2301 PROTOTYPE: $
2302 CODE:
2303 SvREFCNT_dec (SvRV (coro_current));
2304 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2305
2306void
2307_set_readyhook (SV *hook)
2308 PROTOTYPE: $
2309 CODE:
2310 LOCK;
2311 SvREFCNT_dec (coro_readyhook);
2312 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2313 UNLOCK;
1174 2314
1175int 2315int
1176prio (Coro::State coro, int newprio = 0) 2316prio (Coro::State coro, int newprio = 0)
1177 ALIAS: 2317 ALIAS:
1178 nice = 1 2318 nice = 1
… …
1181 RETVAL = coro->prio; 2321 RETVAL = coro->prio;
1182 2322
1183 if (items > 1) 2323 if (items > 1)
1184 { 2324 {
1185 if (ix) 2325 if (ix)
1186 newprio += coro->prio; 2326 newprio = coro->prio - newprio;
1187 2327
1188 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2328 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1189 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2329 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1190 2330
1191 coro->prio = newprio; 2331 coro->prio = newprio;
1192 } 2332 }
1193} 2333}
2334 OUTPUT:
2335 RETVAL
1194 2336
1195void 2337SV *
1196ready (SV *self) 2338ready (SV *self)
1197 PROTOTYPE: $ 2339 PROTOTYPE: $
1198 CODE: 2340 CODE:
1199 api_ready (self); 2341 RETVAL = boolSV (api_ready (aTHX_ self));
2342 OUTPUT:
2343 RETVAL
1200 2344
1201int 2345int
1202nready (...) 2346nready (...)
1203 PROTOTYPE: 2347 PROTOTYPE:
1204 CODE: 2348 CODE:
1205 RETVAL = coro_nready; 2349 RETVAL = coro_nready;
1206 OUTPUT: 2350 OUTPUT:
1207 RETVAL 2351 RETVAL
1208 2352
1209MODULE = Coro::State PACKAGE = Coro::AIO 2353# for async_pool speedup
2354void
2355_pool_1 (SV *cb)
2356 CODE:
2357{
2358 struct coro *coro = SvSTATE (coro_current);
2359 HV *hv = (HV *)SvRV (coro_current);
2360 AV *defav = GvAV (PL_defgv);
2361 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2362 AV *invoke_av;
2363 int i, len;
2364
2365 if (!invoke)
2366 {
2367 SV *old = PL_diehook;
2368 PL_diehook = 0;
2369 SvREFCNT_dec (old);
2370 croak ("\3async_pool terminate\2\n");
2371 }
2372
2373 SvREFCNT_dec (coro->saved_deffh);
2374 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2375
2376 hv_store (hv, "desc", sizeof ("desc") - 1,
2377 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2378
2379 invoke_av = (AV *)SvRV (invoke);
2380 len = av_len (invoke_av);
2381
2382 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2383
2384 if (len > 0)
2385 {
2386 av_fill (defav, len - 1);
2387 for (i = 0; i < len; ++i)
2388 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2389 }
2390
2391 SvREFCNT_dec (invoke);
2392}
2393
2394void
2395_pool_2 (SV *cb)
2396 CODE:
2397{
2398 struct coro *coro = SvSTATE (coro_current);
2399
2400 sv_setsv (cb, &PL_sv_undef);
2401
2402 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2403 coro->saved_deffh = 0;
2404
2405 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2406 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2407 {
2408 SV *old = PL_diehook;
2409 PL_diehook = 0;
2410 SvREFCNT_dec (old);
2411 croak ("\3async_pool terminate\2\n");
2412 }
2413
2414 av_clear (GvAV (PL_defgv));
2415 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2416 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2417
2418 coro->prio = 0;
2419
2420 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2421 api_trace (aTHX_ coro_current, 0);
2422
2423 av_push (av_async_pool, newSVsv (coro_current));
2424}
2425
2426#if 0
2427
2428void
2429_generator_call (...)
2430 PROTOTYPE: @
2431 PPCODE:
2432 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2433 xxxx
2434 abort ();
1210 2435
1211SV * 2436SV *
1212_get_state () 2437gensub (SV *sub, ...)
1213 CODE: 2438 PROTOTYPE: &;@
2439 CODE:
1214{ 2440{
1215 struct { 2441 struct coro *coro;
1216 int errorno; 2442 MAGIC *mg;
1217 int laststype; 2443 CV *xcv;
1218 int laststatval; 2444 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1219 Stat_t statcache; 2445 int i;
1220 } data;
1221 2446
1222 data.errorno = errno; 2447 CvGV (ncv) = CvGV (cv);
1223 data.laststype = PL_laststype; 2448 CvFILE (ncv) = CvFILE (cv);
1224 data.laststatval = PL_laststatval;
1225 data.statcache = PL_statcache;
1226 2449
1227 RETVAL = newSVpvn ((char *)&data, sizeof data); 2450 Newz (0, coro, 1, struct coro);
2451 coro->args = newAV ();
2452 coro->flags = CF_NEW;
2453
2454 av_extend (coro->args, items - 1);
2455 for (i = 1; i < items; i++)
2456 av_push (coro->args, newSVsv (ST (i)));
2457
2458 CvISXSUB_on (ncv);
2459 CvXSUBANY (ncv).any_ptr = (void *)coro;
2460
2461 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2462
2463 CvXSUB (ncv) = CvXSUB (xcv);
2464 CvANON_on (ncv);
2465
2466 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2467 RETVAL = newRV_noinc ((SV *)ncv);
1228} 2468}
1229 OUTPUT: 2469 OUTPUT:
1230 RETVAL 2470 RETVAL
1231 2471
2472#endif
2473
2474
2475MODULE = Coro::State PACKAGE = Coro::AIO
2476
1232void 2477void
1233_set_state (char *data_) 2478_get_state (SV *self)
2479 PPCODE:
2480{
2481 AV *defav = GvAV (PL_defgv);
2482 AV *av = newAV ();
2483 int i;
2484 SV *data_sv = newSV (sizeof (struct io_state));
2485 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2486 SvCUR_set (data_sv, sizeof (struct io_state));
2487 SvPOK_only (data_sv);
2488
2489 data->errorno = errno;
2490 data->laststype = PL_laststype;
2491 data->laststatval = PL_laststatval;
2492 data->statcache = PL_statcache;
2493
2494 av_extend (av, AvFILLp (defav) + 1 + 1);
2495
2496 for (i = 0; i <= AvFILLp (defav); ++i)
2497 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2498
2499 av_push (av, data_sv);
2500
2501 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2502
2503 api_ready (aTHX_ self);
2504}
2505
2506void
2507_set_state (SV *state)
1234 PROTOTYPE: $ 2508 PROTOTYPE: $
2509 PPCODE:
2510{
2511 AV *av = (AV *)SvRV (state);
2512 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2513 int i;
2514
2515 errno = data->errorno;
2516 PL_laststype = data->laststype;
2517 PL_laststatval = data->laststatval;
2518 PL_statcache = data->statcache;
2519
2520 EXTEND (SP, AvFILLp (av));
2521 for (i = 0; i < AvFILLp (av); ++i)
2522 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2523}
2524
2525
2526MODULE = Coro::State PACKAGE = Coro::AnyEvent
2527
2528BOOT:
2529 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2530
2531SV *
2532_schedule (...)
2533 PROTOTYPE: @
1235 CODE: 2534 CODE:
1236{ 2535{
1237 struct { 2536 static int incede;
1238 int errorno;
1239 int laststype;
1240 int laststatval;
1241 Stat_t statcache;
1242 } *data = (void *)data_;
1243 2537
1244 errno = data->errorno; 2538 api_cede_notself (aTHX);
1245 PL_laststype = data->laststype; 2539
1246 PL_laststatval = data->laststatval; 2540 ++incede;
1247 PL_statcache = data->statcache; 2541 while (coro_nready >= incede && api_cede (aTHX))
2542 ;
2543
2544 sv_setsv (sv_activity, &PL_sv_undef);
2545 if (coro_nready >= incede)
2546 {
2547 PUSHMARK (SP);
2548 PUTBACK;
2549 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2550 SPAGAIN;
2551 }
2552
2553 --incede;
1248} 2554}
2555
2556
2557MODULE = Coro::State PACKAGE = PerlIO::cede
2558
2559BOOT:
2560 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2561

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