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 1.78 by root, Wed Nov 1 01:21:21 2006 UTC vs.
Revision 1.269 by root, Fri Nov 14 06:50:11 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 83/* 5.11 */
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
33 105
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 107# undef CORO_STACKGUARD
36#endif 108#endif
37 109
38#ifndef STACKGUARD 110#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 111# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
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
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
51# endif 153# endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif
60#endif
61 154
62#define SUB_INIT "Coro::State::initialize"
63#define UCORO_STATE "_coro_state"
64
65/* The next macro should declare a variable stacklevel that contains and approximation
66 * to the current C stack pointer. Its property is that it changes with each call
67 * and should be unique. */
68#define dSTACKLEVEL void *stacklevel = &stacklevel
69
70#define IN_DESTRUCT (PL_main_cv == Nullcv)
71
72#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74#include "CoroAPI.h"
75
76#ifdef USE_ITHREADS
77static perl_mutex coro_mutex;
78# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80#else 155#else
156
81# define LOCK (void)0 157# define LOCK (void)0
82# define UNLOCK (void)0 158# define UNLOCK (void)0
83#endif
84 159
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;
85static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
86static 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;
87static HV *coro_state_stash; 184static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static 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;
91 187
92/* this is actually not only the c stack but also c registers etc... */ 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};
218
219/* this is a structure representing a c-level coroutine */
220typedef struct coro_cctx {
221 struct coro_cctx *next;
222
223 /* the stack */
224 void *sptr;
225 size_t ssize;
226
227 /* cpu state */
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 */
230 JMPENV *top_env;
231 coro_context cctx;
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 */
93typedef struct { 248typedef struct {
94 int refcnt; /* pointer reference counter */ 249 SV *defsv;
95 int usecnt; /* shared by how many coroutines */ 250 AV *defav;
96 int gencnt; /* generation counter */ 251 SV *errsv;
252 SV *irsgv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
97 257
98 coro_context cctx; 258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
99 259
100 void *sptr; 260/* this is a structure representing a perl-level coroutine */
101 long ssize; /* positive == mmap, otherwise malloc */
102} coro_stack;
103
104struct coro { 261struct coro {
105 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 262 /* the c coroutine allocated to this perl coroutine, if any */
106 JMPENV start_env; 263 coro_cctx *cctx;
107 264
108 /* the optional C context */ 265 /* process data */
109 coro_stack *stack;
110 void *cursp;
111 int gencnt;
112
113 /* optionally saved, might be zero */
114 AV *defav;
115 SV *defsv;
116 SV *errsv;
117
118 /* saved global state not related to stacks */
119 U8 dowarn;
120 I32 in_eval;
121
122 /* the stacks and related info (callchain etc..) */
123 PERL_SI *curstackinfo;
124 AV *curstack;
125 AV *mainstack; 266 AV *mainstack;
126 SV **stack_sp; 267 perl_slots *slot; /* basically the saved sp */
127 OP *op;
128 SV **curpad;
129 AV *comppad;
130 CV *compcv;
131 SV **stack_base;
132 SV **stack_max;
133 SV **tmps_stack;
134 I32 tmps_floor;
135 I32 tmps_ix;
136 I32 tmps_max;
137 I32 *markstack;
138 I32 *markstack_ptr;
139 I32 *markstack_max;
140 I32 *scopestack;
141 I32 scopestack_ix;
142 I32 scopestack_max;
143 ANY *savestack;
144 I32 savestack_ix;
145 I32 savestack_max;
146 OP **retstack;
147 I32 retstack_ix;
148 I32 retstack_max;
149 PMOP *curpm;
150 COP *curcop;
151 JMPENV *top_env;
152 268
153 /* data associated with this coroutine (initial args) */ 269 AV *args; /* data associated with this coroutine (initial args) */
154 AV *args; 270 int refcnt; /* coroutines are refcounted, yes */
271 int flags; /* CF_ flags */
272 HV *hv; /* the perl hash associated with this coro, if any */
273
274 /* statistics */
275 int usecount; /* number of transfers to this coro */
276
277 /* coro process data */
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;
155}; 286};
156 287
157typedef struct coro *Coro__State; 288typedef struct coro *Coro__State;
158typedef struct coro *Coro__State_or_hashref; 289typedef struct coro *Coro__State_or_hashref;
159 290
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 int coro_nready;
305static struct coro *coro_first;
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
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
160static AV * 339static AV *
161coro_clone_padlist (pTHX_ CV *cv) 340coro_clone_padlist (pTHX_ CV *cv)
162{ 341{
163 AV *padlist = CvPADLIST (cv); 342 AV *padlist = CvPADLIST (cv);
164 AV *newpadlist, *newpad; 343 AV *newpadlist, *newpad;
165 344
166 newpadlist = newAV (); 345 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
347#if PERL_VERSION_ATLEAST (5,10,0)
348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
349#else
168 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist); 353 --AvFILLp (padlist);
171 354
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
173 av_store (newpadlist, 1, (SV *)newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
174 357
175 return newpadlist; 358 return newpadlist;
176} 359}
177 360
… …
207 390
208 /* casting is fun. */ 391 /* casting is fun. */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210 free_padlist (aTHX_ padlist); 393 free_padlist (aTHX_ padlist);
211 394
212 SvREFCNT_dec (av); 395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
213 396
214 return 0; 397 return 0;
215} 398}
216 399
217#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
218 402
219static 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))
220 443
221/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
222static void 445static void
223get_padlist (pTHX_ CV *cv) 446get_padlist (pTHX_ CV *cv)
224{ 447{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
226 450
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229 else 453 else
230 { 454 {
231#if 0 455#if CORO_PREFER_PERL_FUNCTIONS
232 /* this should work - but it doesn't :( */ 456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
233 CV *cp = Perl_cv_clone (aTHX_ cv); 458 CV *cp = Perl_cv_clone (cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 459 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 460 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 461 SvREFCNT_dec (cp);
237#else 462#else
238 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
241} 466}
242 467
243static void 468static void
244put_padlist (pTHX_ CV *cv) 469put_padlist (pTHX_ CV *cv)
245{ 470{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
247 473
248 if (!mg) 474 if (expect_false (!mg))
249 { 475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV ();
254 }
255 476
256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 477 av = (AV *)mg->mg_obj;
257}
258 478
259#define SB do { 479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
260#define SE } while (0) 480 av_extend (av, AvMAX (av) + 1);
261 481
262#define LOAD(state) load_state(aTHX_ (state)); 482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 483}
264 484
265#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 485/** load & save, init *******************************************************/
266 486
267static void 487static void
268load_state(pTHX_ Coro__State c) 488load_perl (pTHX_ Coro__State c)
269{ 489{
270 PL_dowarn = c->dowarn; 490 perl_slots *slot = c->slot;
271 PL_in_eval = c->in_eval; 491 c->slot = 0;
272 492
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack; 493 PL_mainstack = c->mainstack;
276 PL_stack_sp = c->stack_sp;
277 PL_op = c->op;
278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
281 PL_stack_base = c->stack_base;
282 PL_stack_max = c->stack_max;
283 PL_tmps_stack = c->tmps_stack;
284 PL_tmps_floor = c->tmps_floor;
285 PL_tmps_ix = c->tmps_ix;
286 PL_tmps_max = c->tmps_max;
287 PL_markstack = c->markstack;
288 PL_markstack_ptr = c->markstack_ptr;
289 PL_markstack_max = c->markstack_max;
290 PL_scopestack = c->scopestack;
291 PL_scopestack_ix = c->scopestack_ix;
292 PL_scopestack_max = c->scopestack_max;
293 PL_savestack = c->savestack;
294 PL_savestack_ix = c->savestack_ix;
295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
297 PL_retstack = c->retstack;
298 PL_retstack_ix = c->retstack_ix;
299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
302 PL_curcop = c->curcop;
303 PL_top_env = c->top_env;
304 494
305 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 495 GvSV (PL_defgv) = slot->defsv;
306 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 496 GvAV (PL_defgv) = slot->defav;
307 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
308 503
309 { 504 {
310 dSP; 505 dSP;
506
311 CV *cv; 507 CV *cv;
312 508
313 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
314 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
315 { 511 {
316 AV *padlist = (AV *)POPs;
317
318 if (padlist)
319 {
320 put_padlist (aTHX_ cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
321 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
322 } 514 CvPADLIST (cv) = (AV *)POPs;
323
324 ++CvDEPTH(cv);
325 } 515 }
326 516
327 PUTBACK; 517 PUTBACK;
328 } 518 }
329} 519}
330 520
331static void 521static void
332save_state(pTHX_ Coro__State c, int flags) 522save_perl (pTHX_ Coro__State c)
333{ 523{
334 { 524 {
335 dSP; 525 dSP;
336 I32 cxix = cxstack_ix; 526 I32 cxix = cxstack_ix;
337 PERL_CONTEXT *ccstk = cxstack; 527 PERL_CONTEXT *ccstk = cxstack;
… …
340 /* 530 /*
341 * 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
342 * (and reinitialize) all cv's in the whole callchain :( 532 * (and reinitialize) all cv's in the whole callchain :(
343 */ 533 */
344 534
345 PUSHs (Nullsv); 535 XPUSHs (Nullsv);
346 /* this loop was inspired by pp_caller */ 536 /* this loop was inspired by pp_caller */
347 for (;;) 537 for (;;)
348 { 538 {
349 while (cxix >= 0) 539 while (expect_true (cxix >= 0))
350 { 540 {
351 PERL_CONTEXT *cx = &ccstk[cxix--]; 541 PERL_CONTEXT *cx = &ccstk[cxix--];
352 542
353 if (CxTYPE(cx) == CXt_SUB) 543 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
354 { 544 {
355 CV *cv = cx->blk_sub.cv; 545 CV *cv = cx->blk_sub.cv;
546
356 if (CvDEPTH(cv)) 547 if (expect_true (CvDEPTH (cv)))
357 { 548 {
358 EXTEND (SP, CvDEPTH(cv)*2); 549 EXTEND (SP, 3);
359
360 while (--CvDEPTH(cv))
361 {
362 /* this tells the restore code to increment CvDEPTH */
363 PUSHs (Nullsv);
364 PUSHs ((SV *)cv);
365 }
366
367 PUSHs ((SV *)CvPADLIST(cv)); 550 PUSHs ((SV *)CvPADLIST (cv));
551 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
368 PUSHs ((SV *)cv); 552 PUSHs ((SV *)cv);
369 553
554 CvDEPTH (cv) = 0;
370 get_padlist (aTHX_ cv); 555 get_padlist (aTHX_ cv);
371 } 556 }
372 } 557 }
373#ifdef CXt_FORMAT
374 else if (CxTYPE(cx) == CXt_FORMAT)
375 {
376 /* I never used formats, so how should I know how these are implemented? */
377 /* my bold guess is as a simple, plain sub... */
378 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
379 }
380#endif
381 } 558 }
382 559
383 if (top_si->si_type == PERLSI_MAIN) 560 if (expect_true (top_si->si_type == PERLSI_MAIN))
384 break; 561 break;
385 562
386 top_si = top_si->si_prev; 563 top_si = top_si->si_prev;
387 ccstk = top_si->si_cxstack; 564 ccstk = top_si->si_cxstack;
388 cxix = top_si->si_cxix; 565 cxix = top_si->si_cxix;
389 } 566 }
390 567
391 PUTBACK; 568 PUTBACK;
392 } 569 }
393 570
394 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 571 /* allocate some space on the context stack for our purposes */
395 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 572 /* we manually unroll here, as usually 2 slots is enough */
396 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 */
397 582
398 c->dowarn = PL_dowarn;
399 c->in_eval = PL_in_eval;
400
401 c->curstackinfo = PL_curstackinfo;
402 c->curstack = PL_curstack;
403 c->mainstack = PL_mainstack; 583 c->mainstack = PL_mainstack;
404 c->stack_sp = PL_stack_sp; 584
405 c->op = PL_op; 585 {
406 c->curpad = PL_curpad; 586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
407 c->comppad = PL_comppad; 587
408 c->compcv = PL_compcv; 588 slot->defav = GvAV (PL_defgv);
409 c->stack_base = PL_stack_base; 589 slot->defsv = DEFSV;
410 c->stack_max = PL_stack_max; 590 slot->errsv = ERRSV;
411 c->tmps_stack = PL_tmps_stack; 591 slot->irsgv = GvSV (irsgv);
412 c->tmps_floor = PL_tmps_floor; 592
413 c->tmps_ix = PL_tmps_ix; 593 #define VAR(name,type) slot->name = PL_ ## name;
414 c->tmps_max = PL_tmps_max; 594 # include "state.h"
415 c->markstack = PL_markstack; 595 #undef VAR
416 c->markstack_ptr = PL_markstack_ptr; 596 }
417 c->markstack_max = PL_markstack_max;
418 c->scopestack = PL_scopestack;
419 c->scopestack_ix = PL_scopestack_ix;
420 c->scopestack_max = PL_scopestack_max;
421 c->savestack = PL_savestack;
422 c->savestack_ix = PL_savestack_ix;
423 c->savestack_max = PL_savestack_max;
424#if PERL_VERSION < 9
425 c->retstack = PL_retstack;
426 c->retstack_ix = PL_retstack_ix;
427 c->retstack_max = PL_retstack_max;
428#endif
429 c->curpm = PL_curpm;
430 c->curcop = PL_curcop;
431 c->top_env = PL_top_env;
432} 597}
433 598
434/* 599/*
435 * allocate various perl stacks. This is an exact copy 600 * allocate various perl stacks. This is an exact copy
436 * of perl.c:init_stacks, except that it uses less memory 601 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do 602 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace. 603 * not usually need a lot of stackspace.
439 */ 604 */
605#if CORO_PREFER_PERL_FUNCTIONS
606# define coro_init_stacks init_stacks
607#else
440static void 608static void
441coro_init_stacks (pTHX) 609coro_init_stacks (pTHX)
442{ 610{
443 LOCK; 611 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; 612 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 613 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 614 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 615
450 PL_stack_base = AvARRAY(PL_curstack); 616 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 617 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 618 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 619
454 New(50,PL_tmps_stack,96,SV*); 620 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 621 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 622 PL_tmps_ix = -1;
457 PL_tmps_max = 96; 623 PL_tmps_max = 32;
458 624
459 New(54,PL_markstack,16,I32); 625 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 626 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16; 627 PL_markstack_max = PL_markstack + 16;
462 628
463#ifdef SET_MARK_OFFSET 629#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 630 SET_MARK_OFFSET;
465#endif 631#endif
466 632
467 New(54,PL_scopestack,16,I32); 633 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 634 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16; 635 PL_scopestack_max = 8;
470 636
471 New(54,PL_savestack,96,ANY); 637 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 638 PL_savestack_ix = 0;
473 PL_savestack_max = 96; 639 PL_savestack_max = 24;
474 640
475#if PERL_VERSION < 9 641#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,8,OP*); 642 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 643 PL_retstack_ix = 0;
478 PL_retstack_max = 8; 644 PL_retstack_max = 4;
479#endif 645#endif
480
481 UNLOCK;
482} 646}
647#endif
483 648
484/* 649/*
485 * destroy the stacks, the callchain etc... 650 * destroy the stacks, the callchain etc...
486 */ 651 */
487static void 652static void
488destroy_stacks(pTHX) 653coro_destruct_stacks (pTHX)
489{ 654{
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) 655 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 656 PL_curstackinfo = PL_curstackinfo->si_next;
503 657
504 while (PL_curstackinfo) 658 while (PL_curstackinfo)
505 { 659 {
506 PERL_SI *p = PL_curstackinfo->si_prev; 660 PERL_SI *p = PL_curstackinfo->si_prev;
507 661
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT) 662 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack); 663 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519 664
520 Safefree (PL_curstackinfo->si_cxstack); 665 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo); 666 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p; 667 PL_curstackinfo = p;
523 } 668 }
524 669
525 Safefree (PL_tmps_stack); 670 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 671 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 672 Safefree (PL_scopestack);
528 Safefree (PL_savestack); 673 Safefree (PL_savestack);
529#if PERL_VERSION < 9 674#if !PERL_VERSION_ATLEAST (5,10,0)
530 Safefree (PL_retstack); 675 Safefree (PL_retstack);
531#endif 676#endif
532} 677}
533 678
534static void 679static size_t
535allocate_stack (Coro__State ctx, int alloc) 680coro_rss (pTHX_ struct coro *coro)
536{ 681{
537 coro_stack *stack; 682 size_t rss = sizeof (*coro);
538 683
539 New (0, stack, 1, coro_stack); 684 if (coro->mainstack)
540
541 stack->refcnt = 1;
542 stack->usecnt = 1;
543 stack->gencnt = ctx->gencnt = 0;
544
545 if (alloc)
546 { 685 {
547#if HAVE_MMAP 686 perl_slots tmp_slot;
548 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 687 perl_slots *slot;
549 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 688
550 if (stack->sptr != (void *)-1) 689 if (coro->flags & CF_RUNNING)
551 { 690 {
552# if STACKGUARD 691 slot = &tmp_slot;
553 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 692
554# endif 693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR
555 } 696 }
556 else 697 else
557#endif 698 slot = coro->slot;
699
700 if (slot)
558 { 701 {
559 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 702 rss += sizeof (slot->curstackinfo);
560 New (0, stack->sptr, STACKSIZE, long); 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
561 } 713 }
562 } 714 }
563 else
564 stack->sptr = 0;
565 715
566 ctx->stack = stack; 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;
567} 836}
568 837
569static void 838static void
570deallocate_stack (Coro__State ctx) 839coro_setup (pTHX_ struct coro *coro)
571{
572 coro_stack *stack = ctx->stack;
573
574 ctx->stack = 0;
575
576 if (stack)
577 {
578 if (!--stack->refcnt)
579 {
580#ifdef HAVE_MMAP
581 if (stack->ssize > 0 && stack->sptr)
582 munmap (stack->sptr, stack->ssize);
583 else
584#endif
585 Safefree (stack->sptr);
586
587 Safefree (stack);
588 }
589 else if (ctx->gencnt == stack->gencnt)
590 --stack->usecnt;
591 }
592}
593
594static void
595setup_coro (void *arg)
596{ 840{
597 /* 841 /*
598 * emulate part of the perl startup here. 842 * emulate part of the perl startup here.
599 */ 843 */
600 dTHX;
601 dSP;
602 Coro__State ctx = (Coro__State)arg;
603 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
604
605 coro_init_stacks (aTHX); 844 coro_init_stacks (aTHX);
606 /*PL_curcop = 0;*/ 845
607 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 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));
608 SvREFCNT_dec (GvAV (PL_defgv)); 914 SvREFCNT_dec (GvAV (PL_defgv));
609 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
610 919
611 SPAGAIN; 920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (coro->throw);
612 925
613 if (ctx->stack) 926 coro_destruct_stacks (aTHX);
614 { 927}
615 ctx->cursp = 0;
616 928
617 PUSHMARK(SP); 929INLINE void
618 PUTBACK; 930free_coro_mortal (pTHX)
619 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 931{
620 932 if (expect_true (coro_mortal))
621 if (SvTRUE (ERRSV))
622 croak (NULL);
623 else
624 croak ("FATAL: CCTXT coroutine returned!");
625 } 933 {
626 else 934 SvREFCNT_dec (coro_mortal);
935 coro_mortal = 0;
627 { 936 }
628 UNOP myop; 937}
629 938
630 PL_op = (OP *)&myop; 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;
631 946
632 Zero(&myop, 1, UNOP); 947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
633 myop.op_next = Nullop;
634 myop.op_flags = OPf_WANT_VOID;
635
636 PUSHMARK(SP);
637 XPUSHs (sub_init);
638 /*
639 * the next line is slightly wrong, as PL_op->op_next
640 * is actually being executed so we skip the first op.
641 * that doesn't matter, though, since it is only
642 * pp_nextstate and we never return...
643 * ah yes, and I don't care anyways ;)
644 */
645 PUTBACK;
646 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
647 SPAGAIN;
648
649 ENTER; /* necessary e.g. for dounwind */
650 } 948 {
651} 949 PERL_ASYNC_CHECK ();
652 950
653static void 951 if (cctx->flags & CC_TRACE_ALL)
654continue_coro (void *arg)
655{
656 /*
657 * this is a _very_ stripped down perl interpreter ;)
658 */
659 dTHX;
660 Coro__State ctx = (Coro__State)arg;
661
662 PL_top_env = &ctx->start_env;
663
664 ctx->cursp = 0;
665 PL_op = PL_op->op_next;
666 CALLRUNOPS(aTHX);
667
668 abort ();
669}
670
671static void
672transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
673{
674 dSTACKLEVEL;
675
676 if (prev != next)
677 {
678 if (next->mainstack)
679 { 952 {
680 LOCK; 953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
681 SAVE (prev, flags);
682 LOAD (next);
683 UNLOCK;
684
685 /* mark this state as in-use */
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 { 954 {
692 if (!prev->stack) 955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
693 allocate_stack (prev, 0); 956 SV **bot, **top;
694 else if (prev->cursp != stacklevel 957 AV *av = newAV (); /* return values */
695 && prev->stack->usecnt > 1) 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)
696 { 997 {
697 prev->gencnt = ++prev->stack->gencnt; 998 SV **cb;
698 prev->stack->usecnt = 1;
699 }
700 999
701 /* has our stack been invalidated? */ 1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 { 1001 {
704 deallocate_stack (next); 1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
705 allocate_stack (next, 1); 1003
706 coro_create (&(next->stack->cctx), 1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
707 continue_coro, (void *)next, 1005 {
708 next->stack->sptr, labs (next->stack->ssize)); 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;
709 } 1032 }
710 1033
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1034 if (cctx->flags & CC_TRACE_LINE)
712 prev->cursp = stacklevel;
713 /* don't add any code here */
714 }
715 else
716 next->cursp = stacklevel;
717 }
718 else if (next->tmps_ix == -2)
719 croak ("tried to transfer to running coroutine");
720 else
721 {
722 LOCK;
723 SAVE (prev, -1); /* first get rid of the old state */
724 UNLOCK;
725
726 if (flags & TRANSFER_SAVE_CCTXT)
727 {
728 if (!prev->stack)
729 allocate_stack (prev, 0);
730
731 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732 { 1035 {
733 PL_top_env = &next->start_env; 1036 dSP;
734 1037
735 setup_coro (next); 1038 PL_runops = RUNOPS_DEFAULT;
736 next->cursp = stacklevel; 1039 ENTER;
737 1040 SAVETMPS;
738 prev->stack->refcnt++; 1041 EXTEND (SP, 3);
739 prev->stack->usecnt++; 1042 PL_runops = RUNOPS_DEFAULT;
740 next->stack = prev->stack; 1043 PUSHMARK (SP);
741 next->gencnt = prev->gencnt; 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;
742 } 1053 }
743 else
744 {
745 assert (!next->stack);
746 allocate_stack (next, 1);
747 coro_create (&(next->stack->cctx),
748 setup_coro, (void *)next,
749 next->stack->sptr, labs (next->stack->ssize));
750 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751 prev->cursp = stacklevel;
752 /* don't add any code here */
753 } 1054 }
754 } 1055 }
755 else
756 {
757 setup_coro (next);
758 next->cursp = stacklevel;
759 }
760 } 1056 }
761 } 1057 }
762 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{
1077 dSP;
1078 UNOP myop;
1079
1080 PL_top_env = &PL_start_env;
1081
1082 if (cctx->flags & CC_TRACE)
1083 PL_runops = runops_trace;
1084
1085 Zero (&myop, 1, UNOP);
1086 myop.op_next = PL_op;
1087 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
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;
1094 PL_op = (OP *)&myop;
1095 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1096 SPAGAIN;
1097}
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 */
1123static void
1124cctx_run (void *arg)
1125{
1126#ifdef USE_ITHREADS
1127# if CORO_PTHREAD
1128 PERL_SET_CONTEXT (coro_thx);
1129# endif
1130#endif
1131 {
1132 dTHX;
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)
1204 {
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);
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 */
1329static void NOINLINE
1330transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1331{
1332 dSTACKLEVEL;
1333
1334 /* sometimes transfer is only called to set idle_sp */
1335 if (expect_false (!next))
1336 {
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 */
1339 }
1340 else if (expect_true (prev != next))
1341 {
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;
1354
1355 LOCK;
1356
1357 /* first get rid of the old state */
1358 save_perl (aTHX_ prev);
1359
1360 if (expect_false (next->flags & CF_NEW))
1361 {
1362 /* need to start coroutine */
1363 next->flags &= ~CF_NEW;
1364 /* setup coroutine call */
1365 coro_setup (aTHX_ next);
1366 }
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 ))
1378 {
1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1381
1382 prev->cctx = 0;
1383
1384 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
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);
1391 }
1392
1393 ++next->usecount;
1394
1395 if (expect_true (!next->cctx))
1396 next->cctx = cctx_get (aTHX);
1397
1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1399 transfer_next = next;
1400
1401 if (expect_false (prev__cctx != next->cctx))
1402 {
1403 prev__cctx->top_env = PL_top_env;
1404 PL_top_env = next->cctx->top_env;
1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1406 }
1407
1408 transfer_tail (aTHX);
1409 }
1410}
1411
1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1414
1415/** high level stuff ********************************************************/
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;
1431 UNLOCK;
1432 }
1433 else
1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1435
1436 if (coro->mainstack && coro->mainstack != main_mainstack)
1437 {
1438 struct coro temp;
1439
1440 if (coro->flags & CF_RUNNING)
1441 croak ("FATAL: tried to destroy currently running coroutine");
1442
1443 save_perl (aTHX_ &temp);
1444 load_perl (aTHX_ coro);
1445
1446 coro_destruct (aTHX_ coro);
1447
1448 load_perl (aTHX_ &temp);
1449
1450 coro->slot = 0;
1451 }
1452
1453 cctx_destroy (coro->cctx);
1454 SvREFCNT_dec (coro->args);
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;
1461}
1462
1463static int
1464coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1465{
1466 struct coro *coro = (struct coro *)mg->mg_ptr;
1467 mg->mg_ptr = 0;
1468
1469 coro->hv = 0;
1470
1471 if (--coro->refcnt < 0)
1472 {
1473 coro_state_destroy (aTHX_ coro);
1474 Safefree (coro);
1475 }
1476
1477 return 0;
1478}
1479
1480static int
1481coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1482{
1483 struct coro *coro = (struct coro *)mg->mg_ptr;
1484
1485 ++coro->refcnt;
1486
1487 return 0;
1488}
1489
1490static MGVTBL coro_state_vtbl = {
1491 0, 0, 0, 0,
1492 coro_state_free,
1493 0,
1494#ifdef MGf_DUP
1495 coro_state_dup,
1496#else
1497# define MGf_DUP 0
1498#endif
1499};
1500
1501static void
1502prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1503{
1504 ta->prev = SvSTATE (prev_sv);
1505 ta->next = SvSTATE (next_sv);
1506 TRANSFER_CHECK (*ta);
1507}
1508
1509static void
1510api_transfer (SV *prev_sv, SV *next_sv)
1511{
1512 dTHX;
1513 struct transfer_args ta;
1514
1515 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1516 TRANSFER (ta, 1);
1517}
1518
1519/** Coro ********************************************************************/
1520
1521static void
1522coro_enq (pTHX_ SV *coro_sv)
1523{
1524 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1525}
1526
1527static SV *
1528coro_deq (pTHX)
1529{
1530 int prio;
1531
1532 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1533 if (AvFILLp (coro_ready [prio]) >= 0)
1534 return av_shift (coro_ready [prio]);
1535
1536 return 0;
1537}
1538
1539static int
1540api_ready (SV *coro_sv)
1541{
1542 dTHX;
1543 struct coro *coro;
1544 SV *sv_hook;
1545 void (*xs_hook)(void);
1546
1547 if (SvROK (coro_sv))
1548 coro_sv = SvRV (coro_sv);
1549
1550 coro = SvSTATE (coro_sv);
1551
1552 if (coro->flags & CF_READY)
1553 return 0;
1554
1555 coro->flags |= CF_READY;
1556
763 LOCK; 1557 LOCK;
764 if (coro_mortal) 1558
765 { 1559 sv_hook = coro_nready ? 0 : coro_readyhook;
766 SvREFCNT_dec (coro_mortal); 1560 xs_hook = coro_nready ? 0 : coroapi.readyhook;
767 coro_mortal = 0; 1561
768 } 1562 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1563 ++coro_nready;
1564
769 UNLOCK; 1565 UNLOCK;
770} 1566
1567 if (sv_hook)
1568 {
1569 dSP;
771 1570
772#define SV_CORO(sv,func) \ 1571 ENTER;
773 do { \ 1572 SAVETMPS;
774 if (SvROK (sv)) \
775 sv = SvRV (sv); \
776 \
777 if (SvTYPE (sv) == SVt_PVHV) \
778 { \
779 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
780 \
781 if (!he) \
782 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
783 \
784 (sv) = SvRV (HeVAL(he)); \
785 } \
786 \
787 /* must also be changed inside Coro::Cont::yield */ \
788 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
789 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
790 \
791 } while(0)
792 1573
793#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 1574 PUSHMARK (SP);
1575 PUTBACK;
1576 call_sv (sv_hook, G_DISCARD);
1577 SPAGAIN;
1578
1579 FREETMPS;
1580 LEAVE;
1581 }
1582
1583 if (xs_hook)
1584 xs_hook ();
1585
1586 return 1;
1587}
1588
1589static int
1590api_is_ready (SV *coro_sv)
1591{
1592 dTHX;
1593
1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1595}
1596
1597INLINE void
1598prepare_schedule (pTHX_ struct transfer_args *ta)
1599{
1600 SV *prev_sv, *next_sv;
1601
1602 for (;;)
1603 {
1604 LOCK;
1605 next_sv = coro_deq (aTHX);
1606
1607 /* nothing to schedule: call the idle handler */
1608 if (expect_false (!next_sv))
1609 {
1610 dSP;
1611 UNLOCK;
1612
1613 ENTER;
1614 SAVETMPS;
1615
1616 PUSHMARK (SP);
1617 PUTBACK;
1618 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1619 SPAGAIN;
1620
1621 FREETMPS;
1622 LEAVE;
1623 continue;
1624 }
1625
1626 ta->next = SvSTATE (next_sv);
1627
1628 /* cannot transfer to destroyed coros, skip and look for next */
1629 if (expect_false (ta->next->flags & CF_DESTROYED))
1630 {
1631 UNLOCK;
1632 SvREFCNT_dec (next_sv);
1633 /* coro_nready has already been taken care of by destroy */
1634 continue;
1635 }
1636
1637 --coro_nready;
1638 UNLOCK;
1639 break;
1640 }
1641
1642 /* free this only after the transfer */
1643 prev_sv = SvRV (coro_current);
1644 ta->prev = SvSTATE (prev_sv);
1645 TRANSFER_CHECK (*ta);
1646 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1647 ta->next->flags &= ~CF_READY;
1648 SvRV_set (coro_current, next_sv);
1649
1650 LOCK;
1651 free_coro_mortal (aTHX);
1652 coro_mortal = prev_sv;
1653 UNLOCK;
1654}
1655
1656INLINE void
1657prepare_cede (pTHX_ struct transfer_args *ta)
1658{
1659 api_ready (coro_current);
1660 prepare_schedule (aTHX_ ta);
1661}
794 1662
795static void 1663static void
796api_transfer(pTHX_ SV *prev, SV *next, int flags) 1664prepare_cede_notself (pTHX_ struct transfer_args *ta)
797{ 1665{
798 SV_CORO (prev, "Coro::transfer"); 1666 SV *prev = SvRV (coro_current);
799 SV_CORO (next, "Coro::transfer");
800 1667
801 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
802}
803
804/** Coro ********************************************************************/
805
806#define PRIO_MAX 3
807#define PRIO_HIGH 1
808#define PRIO_NORMAL 0
809#define PRIO_LOW -1
810#define PRIO_IDLE -3
811#define PRIO_MIN -4
812
813/* for Coro.pm */
814static GV *coro_current, *coro_idle;
815static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
816static int coro_nready;
817
818static void
819coro_enq (pTHX_ SV *sv)
820{
821 SV **xprio;
822 int prio;
823
824 if (SvTYPE (sv) != SVt_PVHV)
825 croak ("Coro::ready tried to enqueue something that is not a coroutine");
826
827 xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
828 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
829
830 prio = prio > PRIO_MAX ? PRIO_MAX
831 : prio < PRIO_MIN ? PRIO_MIN
832 : prio;
833
834 av_push (coro_ready [prio - PRIO_MIN], sv);
835 coro_nready++; 1668 if (coro_nready)
836}
837
838static SV *
839coro_deq (pTHX_ int min_prio)
840{
841 int prio = PRIO_MAX - PRIO_MIN;
842
843 min_prio -= PRIO_MIN;
844 if (min_prio < 0)
845 min_prio = 0;
846
847 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
848 if (av_len (coro_ready[prio]) >= 0)
849 { 1669 {
850 coro_nready--; 1670 prepare_schedule (aTHX_ ta);
851 return av_shift (coro_ready[prio]); 1671 api_ready (prev);
852 } 1672 }
853 1673 else
854 return 0; 1674 ta->prev = ta->next = SvSTATE (prev);
855}
856
857static void
858api_ready (SV *coro)
859{
860 dTHX;
861
862 if (SvROK (coro))
863 coro = SvRV (coro);
864
865 LOCK;
866 coro_enq (aTHX_ SvREFCNT_inc (coro));
867 UNLOCK;
868} 1675}
869 1676
870static void 1677static void
871api_schedule (void) 1678api_schedule (void)
872{ 1679{
873 dTHX; 1680 dTHX;
1681 struct transfer_args ta;
874 1682
875 SV *prev, *next; 1683 prepare_schedule (aTHX_ &ta);
1684 TRANSFER (ta, 1);
1685}
876 1686
877 LOCK; 1687static int
1688api_cede (void)
1689{
1690 dTHX;
1691 struct transfer_args ta;
878 1692
879 prev = SvRV (GvSV (coro_current)); 1693 prepare_cede (aTHX_ &ta);
880 next = coro_deq (aTHX_ PRIO_MIN);
881 1694
882 if (!next) 1695 if (expect_true (ta.prev != ta.next))
883 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1696 {
1697 TRANSFER (ta, 1);
1698 return 1;
1699 }
1700 else
1701 return 0;
1702}
884 1703
885 /* free this only after the transfer */ 1704static int
886 coro_mortal = prev; 1705api_cede_notself (void)
887 SV_CORO (prev, "Coro::schedule"); 1706{
1707 if (coro_nready)
1708 {
1709 dTHX;
1710 struct transfer_args ta;
888 1711
889 SvRV (GvSV (coro_current)) = next; 1712 prepare_cede_notself (aTHX_ &ta);
890 1713 TRANSFER (ta, 1);
891 SV_CORO (next, "Coro::schedule"); 1714 return 1;
892 1715 }
893 UNLOCK; 1716 else
894 1717 return 0;
895 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
896 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
897} 1718}
898 1719
899static void 1720static void
900api_cede (void) 1721api_trace (SV *coro_sv, int flags)
901{ 1722{
902 dTHX; 1723 dTHX;
1724 struct coro *coro = SvSTATE (coro_sv);
903 1725
904 LOCK; 1726 if (flags & CC_TRACE)
905 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1727 {
906 UNLOCK; 1728 if (!coro->cctx)
1729 coro->cctx = cctx_new_run ();
1730 else if (!(coro->cctx->flags & CC_TRACE))
1731 croak ("cannot enable tracing on coroutine with custom stack");
907 1732
1733 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1734 }
1735 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1736 {
1737 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1738
1739 if (coro->flags & CF_RUNNING)
1740 PL_runops = RUNOPS_DEFAULT;
1741 else
1742 coro->slot->runops = RUNOPS_DEFAULT;
1743 }
1744}
1745
1746#if 0
1747static int
1748coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1749{
1750 AV *padlist;
1751 AV *av = (AV *)mg->mg_obj;
1752
1753 abort ();
1754
1755 return 0;
1756}
1757
1758static MGVTBL coro_gensub_vtbl = {
1759 0, 0, 0, 0,
1760 coro_gensub_free
1761};
1762#endif
1763
1764/*****************************************************************************/
1765/* PerlIO::cede */
1766
1767typedef struct
1768{
1769 PerlIOBuf base;
1770 NV next, every;
1771} PerlIOCede;
1772
1773static IV
1774PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1775{
1776 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1777
1778 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1779 self->next = nvtime () + self->every;
1780
1781 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1782}
1783
1784static SV *
1785PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1786{
1787 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1788
1789 return newSVnv (self->every);
1790}
1791
1792static IV
1793PerlIOCede_flush (pTHX_ PerlIO *f)
1794{
1795 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1796 double now = nvtime ();
1797
1798 if (now >= self->next)
1799 {
908 api_schedule (); 1800 api_cede ();
909} 1801 self->next = now + self->every;
1802 }
910 1803
1804 return PerlIOBuf_flush (aTHX_ f);
1805}
1806
1807static PerlIO_funcs PerlIO_cede =
1808{
1809 sizeof(PerlIO_funcs),
1810 "cede",
1811 sizeof(PerlIOCede),
1812 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1813 PerlIOCede_pushed,
1814 PerlIOBuf_popped,
1815 PerlIOBuf_open,
1816 PerlIOBase_binmode,
1817 PerlIOCede_getarg,
1818 PerlIOBase_fileno,
1819 PerlIOBuf_dup,
1820 PerlIOBuf_read,
1821 PerlIOBuf_unread,
1822 PerlIOBuf_write,
1823 PerlIOBuf_seek,
1824 PerlIOBuf_tell,
1825 PerlIOBuf_close,
1826 PerlIOCede_flush,
1827 PerlIOBuf_fill,
1828 PerlIOBase_eof,
1829 PerlIOBase_error,
1830 PerlIOBase_clearerr,
1831 PerlIOBase_setlinebuf,
1832 PerlIOBuf_get_base,
1833 PerlIOBuf_bufsiz,
1834 PerlIOBuf_get_ptr,
1835 PerlIOBuf_get_cnt,
1836 PerlIOBuf_set_ptrcnt,
1837};
1838
1839/*****************************************************************************/
1840
1841static const CV *slf_cv; /* for quick consistency check */
1842
1843static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1844static SV *slf_arg0;
1845static SV *slf_arg1;
1846
1847/* this restores the stack in the case we patched the entersub, to */
1848/* recreate the stack frame as perl will on following calls */
1849/* since entersub cleared the stack */
1850static OP *
1851pp_restore (pTHX)
1852{
1853 dSP;
1854
1855 PUSHMARK (SP);
1856
1857 EXTEND (SP, 3);
1858 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1859 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1860 PUSHs ((SV *)CvGV (slf_cv));
1861
1862 RETURNOP (slf_restore.op_first);
1863}
1864
1865#define OPpENTERSUB_SLF 15 /* the part of op_private entersub hopefully doesn't use */
1866
1867/* declare prototype */
1868XS(XS_Coro__State__set_stacklevel);
1869
1870/*
1871 * these not obviously related functions are all rolled into one
1872 * function to increase chances that they all will call transfer with the same
1873 * stack offset
1874 * SLF stands for "schedule-like-function".
1875 */
1876static OP *
1877pp_slf (pTHX)
1878{
1879 dSP;
1880 struct transfer_args ta;
1881 SV **arg = PL_stack_base + TOPMARK + 1;
1882 int items = SP - arg; /* args without function object */
1883
1884 /* do a quick consistency check on the "function" object, and if it isn't */
1885 /* for us, divert to the real entersub */
1886 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1887 return PL_ppaddr[OP_ENTERSUB](aTHX);
1888
1889 /* pop args */
1890 SP = PL_stack_base + POPMARK;
1891
1892 if (!(PL_op->op_flags & OPf_STACKED))
1893 {
1894 /* ampersand-form of call, use @_ instead of stack */
1895 AV *av = GvAV (PL_defgv);
1896 arg = AvARRAY (av);
1897 items = AvFILLp (av) + 1;
1898 }
1899
1900 PUTBACK;
1901 switch (PL_op->op_private & OPpENTERSUB_SLF)
1902 {
1903 case 0:
1904 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1905 break;
1906
1907 case 1:
1908 if (items != 2)
1909 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1910
1911 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1912 break;
1913
1914 case 2:
1915 prepare_schedule (aTHX_ &ta);
1916 break;
1917
1918 case 3:
1919 prepare_cede (aTHX_ &ta);
1920 break;
1921
1922 case 4:
1923 prepare_cede_notself (aTHX_ &ta);
1924 break;
1925
1926 case 5:
1927 abort ();
1928
1929 default:
1930 abort ();
1931 }
1932
1933 TRANSFER (ta, 0);
1934 SPAGAIN;
1935
1936 PUTBACK;
1937 SLF_TAIL;
1938 SPAGAIN;
1939 RETURN;
1940}
1941
1942static void
1943coro_slf_patch (pTHX_ CV *cv, int ix, SV **args, int items)
1944{
1945 assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
1946
1947 assert (("FATAL: SLF call with illegal CV value", CvGV (cv)));
1948 slf_cv = cv;
1949
1950 /* we patch the op, and then re-run the whole call */
1951 /* we have to put the same argument on the stack for this to work */
1952 /* and this will be done by pp_restore */
1953 slf_restore.op_next = (OP *)&slf_restore;
1954 slf_restore.op_type = OP_NULL;
1955 slf_restore.op_ppaddr = pp_restore;
1956 slf_restore.op_first = PL_op;
1957
1958 slf_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1959 slf_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1960
1961 PL_op->op_ppaddr = pp_slf;
1962 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SLF | ix; /* we potentially share our private flags with entersub */
1963
1964 PL_op = (OP *)&slf_restore;
1965}
1966
911MODULE = Coro::State PACKAGE = Coro::State 1967MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
912 1968
913PROTOTYPES: ENABLE 1969PROTOTYPES: DISABLE
914 1970
915BOOT: 1971BOOT:
916{ /* {} necessary for stoopid perl-5.6.x */ 1972{
917#ifdef USE_ITHREADS 1973#ifdef USE_ITHREADS
918 MUTEX_INIT (&coro_mutex); 1974 MUTEX_INIT (&coro_lock);
1975# if CORO_PTHREAD
1976 coro_thx = PERL_GET_CONTEXT;
1977# endif
919#endif 1978#endif
920 BOOT_PAGESIZE; 1979 BOOT_PAGESIZE;
921 1980
922 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1981 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
923 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1982 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1983
1984 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1985 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1986 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1987
1988 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1989 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1990 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1991
924 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1992 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
925 1993
926 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1994 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
927 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1995 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
928 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1996 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
929 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1997 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
930 1998
931 main_mainstack = PL_mainstack; 1999 main_mainstack = PL_mainstack;
2000 main_top_env = PL_top_env;
932 2001
2002 while (main_top_env->je_prev)
2003 main_top_env = main_top_env->je_prev;
2004
933 coroapi.ver = CORO_API_VERSION; 2005 coroapi.ver = CORO_API_VERSION;
2006 coroapi.rev = CORO_API_REVISION;
934 coroapi.transfer = api_transfer; 2007 coroapi.transfer = api_transfer;
935}
936 2008
937Coro::State 2009 {
938_newprocess(args) 2010 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
939 SV * args 2011
940 PROTOTYPE: $ 2012 if (!svp) croak ("Time::HiRes is required");
2013 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2014
2015 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2016 }
2017
2018 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2019}
2020
2021SV *
2022new (char *klass, ...)
941 CODE: 2023 CODE:
942 Coro__State coro; 2024{
2025 struct coro *coro;
2026 MAGIC *mg;
2027 HV *hv;
2028 int i;
943 2029
944 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
945 croak ("Coro::State::_newprocess expects an arrayref");
946
947 Newz (0, coro, 1, struct coro); 2030 Newz (0, coro, 1, struct coro);
2031 coro->args = newAV ();
2032 coro->flags = CF_NEW;
948 2033
949 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2034 if (coro_first) coro_first->prev = coro;
950 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 2035 coro->next = coro_first;
951 /*coro->stack = 0;*/ 2036 coro_first = coro;
952 2037
953 /* same as JMPENV_BOOTSTRAP */ 2038 coro->hv = hv = newHV ();
954 /* we might be able to recycle start_env, but safe is safe */ 2039 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
955 /*Zero(&coro->start_env, 1, JMPENV);*/ 2040 mg->mg_flags |= MGf_DUP;
956 coro->start_env.je_ret = -1; 2041 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
957 coro->start_env.je_mustcatch = TRUE;
958 2042
959 RETVAL = coro; 2043 av_extend (coro->args, items - 1);
2044 for (i = 1; i < items; i++)
2045 av_push (coro->args, newSVsv (ST (i)));
2046}
960 OUTPUT: 2047 OUTPUT:
961 RETVAL 2048 RETVAL
962 2049
963void 2050void
964transfer(prev, next, flags) 2051_set_stacklevel (...)
965 SV *prev 2052 ALIAS:
966 SV *next 2053 Coro::State::transfer = 1
967 int flags 2054 Coro::schedule = 2
968 PROTOTYPE: @ 2055 Coro::cede = 3
2056 Coro::cede_notself = 4
969 CODE: 2057 CODE:
970 PUTBACK; 2058 coro_slf_patch (aTHX_ cv, ix, &ST (0), items);
971 SV_CORO (next, "Coro::transfer"); 2059
972 SV_CORO (prev, "Coro::transfer"); 2060bool
973 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2061_destroy (SV *coro_sv)
974 SPAGAIN; 2062 CODE:
2063 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2064 OUTPUT:
2065 RETVAL
975 2066
976void 2067void
977DESTROY(coro)
978 Coro::State coro
979 CODE:
980
981 if (coro->mainstack && coro->mainstack != main_mainstack)
982 {
983 struct coro temp;
984
985 PUTBACK;
986 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
987 LOAD (aTHX_ coro);
988 SPAGAIN;
989
990 destroy_stacks (aTHX);
991
992 LOAD ((&temp)); /* this will get rid of defsv etc.. */
993 SPAGAIN;
994
995 coro->mainstack = 0;
996 }
997
998 deallocate_stack (coro);
999 SvREFCNT_dec (coro->args);
1000 Safefree (coro);
1001
1002void
1003_exit(code) 2068_exit (int code)
1004 int code
1005 PROTOTYPE: $ 2069 PROTOTYPE: $
1006 CODE: 2070 CODE:
1007 _exit (code); 2071 _exit (code);
1008 2072
1009MODULE = Coro::State PACKAGE = Coro::Cont 2073int
2074cctx_stacksize (int new_stacksize = 0)
2075 CODE:
2076 RETVAL = cctx_stacksize;
2077 if (new_stacksize)
2078 {
2079 cctx_stacksize = new_stacksize;
2080 ++cctx_gen;
2081 }
2082 OUTPUT:
2083 RETVAL
1010 2084
1011# this is slightly dirty (should expose a c-level api) 2085int
2086cctx_max_idle (int max_idle = 0)
2087 CODE:
2088 RETVAL = cctx_max_idle;
2089 if (max_idle > 1)
2090 cctx_max_idle = max_idle;
2091 OUTPUT:
2092 RETVAL
2093
2094int
2095cctx_count ()
2096 CODE:
2097 RETVAL = cctx_count;
2098 OUTPUT:
2099 RETVAL
2100
2101int
2102cctx_idle ()
2103 CODE:
2104 RETVAL = cctx_idle;
2105 OUTPUT:
2106 RETVAL
1012 2107
1013void 2108void
1014yield(...) 2109list ()
2110 PPCODE:
2111{
2112 struct coro *coro;
2113 for (coro = coro_first; coro; coro = coro->next)
2114 if (coro->hv)
2115 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2116}
2117
2118void
2119call (Coro::State coro, SV *coderef)
2120 ALIAS:
2121 eval = 1
2122 CODE:
2123{
2124 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2125 {
2126 struct coro temp;
2127
2128 if (!(coro->flags & CF_RUNNING))
2129 {
2130 PUTBACK;
2131 save_perl (aTHX_ &temp);
2132 load_perl (aTHX_ coro);
2133 }
2134
2135 {
2136 dSP;
2137 ENTER;
2138 SAVETMPS;
2139 PUTBACK;
2140 PUSHSTACK;
2141 PUSHMARK (SP);
2142
2143 if (ix)
2144 eval_sv (coderef, 0);
2145 else
2146 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2147
2148 POPSTACK;
2149 SPAGAIN;
2150 FREETMPS;
2151 LEAVE;
2152 PUTBACK;
2153 }
2154
2155 if (!(coro->flags & CF_RUNNING))
2156 {
2157 save_perl (aTHX_ coro);
2158 load_perl (aTHX_ &temp);
2159 SPAGAIN;
2160 }
2161 }
2162}
2163
2164SV *
2165is_ready (Coro::State coro)
2166 PROTOTYPE: $
2167 ALIAS:
2168 is_ready = CF_READY
2169 is_running = CF_RUNNING
2170 is_new = CF_NEW
2171 is_destroyed = CF_DESTROYED
2172 CODE:
2173 RETVAL = boolSV (coro->flags & ix);
2174 OUTPUT:
2175 RETVAL
2176
2177void
2178throw (Coro::State self, SV *throw = &PL_sv_undef)
1015 PROTOTYPE: @ 2179 PROTOTYPE: $;$
1016 CODE: 2180 CODE:
1017 SV *yieldstack; 2181 SvREFCNT_dec (self->throw);
1018 SV *sv; 2182 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1019 AV *defav = GvAV (PL_defgv);
1020 struct coro *prev, *next;
1021 2183
1022 yieldstack = *hv_fetch ( 2184void
1023 (HV *)SvRV (GvSV (coro_current)), 2185api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1024 "yieldstack", sizeof ("yieldstack") - 1, 2186
2187SV *
2188has_cctx (Coro::State coro)
2189 PROTOTYPE: $
2190 CODE:
2191 RETVAL = boolSV (!!coro->cctx);
2192 OUTPUT:
2193 RETVAL
2194
2195int
2196is_traced (Coro::State coro)
2197 PROTOTYPE: $
2198 CODE:
2199 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2200 OUTPUT:
2201 RETVAL
2202
2203UV
2204rss (Coro::State coro)
2205 PROTOTYPE: $
2206 ALIAS:
2207 usecount = 1
2208 CODE:
2209 switch (ix)
2210 {
2211 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2212 case 1: RETVAL = coro->usecount; break;
1025 0 2213 }
2214 OUTPUT:
2215 RETVAL
2216
2217void
2218force_cctx ()
2219 CODE:
2220 struct coro *coro = SvSTATE (coro_current);
2221 coro->cctx->idle_sp = 0;
2222
2223void
2224swap_defsv (Coro::State self)
2225 PROTOTYPE: $
2226 ALIAS:
2227 swap_defav = 1
2228 CODE:
2229 if (!self->slot)
2230 croak ("cannot swap state with coroutine that has no saved state");
2231 else
1026 ); 2232 {
2233 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2234 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1027 2235
1028 /* set up @_ -- ugly */ 2236 SV *tmp = *src; *src = *dst; *dst = tmp;
1029 av_clear (defav); 2237 }
1030 av_fill (defav, items - 1);
1031 while (items--)
1032 av_store (defav, items, SvREFCNT_inc (ST(items)));
1033
1034 sv = av_pop ((AV *)SvRV (yieldstack));
1035 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1036 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1037 SvREFCNT_dec (sv);
1038
1039 transfer (aTHX_ prev, next, 0);
1040 2238
1041MODULE = Coro::State PACKAGE = Coro 2239MODULE = Coro::State PACKAGE = Coro
1042 2240
1043# this is slightly dirty (should expose a c-level api)
1044
1045BOOT: 2241BOOT:
1046{ 2242{
1047 int i; 2243 int i;
2244
2245 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2246 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2247 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2248
2249 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2250 SvREADONLY_on (coro_current);
2251
1048 HV *stash = gv_stashpv ("Coro", TRUE); 2252 coro_stash = gv_stashpv ("Coro", TRUE);
1049 2253
1050 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2254 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2255 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2256 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2257 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2258 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2259 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056
1057 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059 2260
1060 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2261 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061 coro_ready[i] = newAV (); 2262 coro_ready[i] = newAV ();
1062 2263
1063 { 2264 {
1064 SV *sv = perl_get_sv("Coro::API", 1); 2265 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1065 2266
1066 coroapi.schedule = api_schedule; 2267 coroapi.schedule = api_schedule;
1067 coroapi.cede = api_cede; 2268 coroapi.cede = api_cede;
2269 coroapi.cede_notself = api_cede_notself;
1068 coroapi.ready = api_ready; 2270 coroapi.ready = api_ready;
2271 coroapi.is_ready = api_is_ready;
1069 coroapi.nready = &coro_nready; 2272 coroapi.nready = &coro_nready;
1070 coroapi.current = coro_current; 2273 coroapi.current = coro_current;
1071 2274
1072 GCoroAPI = &coroapi; 2275 GCoroAPI = &coroapi;
1073 sv_setiv(sv, (IV)&coroapi); 2276 sv_setiv (sv, (IV)&coroapi);
1074 SvREADONLY_on(sv); 2277 SvREADONLY_on (sv);
1075 } 2278 }
1076} 2279}
1077 2280
1078#if !PERL_MICRO
1079
1080void 2281void
1081ready(self) 2282_set_current (SV *current)
1082 SV * self
1083 PROTOTYPE: $ 2283 PROTOTYPE: $
1084 CODE: 2284 CODE:
1085 api_ready (self); 2285 SvREFCNT_dec (SvRV (coro_current));
2286 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1086 2287
1087#endif 2288void
2289_set_readyhook (SV *hook)
2290 PROTOTYPE: $
2291 CODE:
2292 LOCK;
2293 SvREFCNT_dec (coro_readyhook);
2294 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2295 UNLOCK;
1088 2296
1089int 2297int
2298prio (Coro::State coro, int newprio = 0)
2299 ALIAS:
2300 nice = 1
2301 CODE:
2302{
2303 RETVAL = coro->prio;
2304
2305 if (items > 1)
2306 {
2307 if (ix)
2308 newprio = coro->prio - newprio;
2309
2310 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2311 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2312
2313 coro->prio = newprio;
2314 }
2315}
2316 OUTPUT:
2317 RETVAL
2318
2319SV *
2320ready (SV *self)
2321 PROTOTYPE: $
2322 CODE:
2323 RETVAL = boolSV (api_ready (self));
2324 OUTPUT:
2325 RETVAL
2326
2327int
1090nready(...) 2328nready (...)
1091 PROTOTYPE: 2329 PROTOTYPE:
1092 CODE: 2330 CODE:
1093 RETVAL = coro_nready; 2331 RETVAL = coro_nready;
1094 OUTPUT: 2332 OUTPUT:
1095 RETVAL 2333 RETVAL
1096 2334
2335# for async_pool speedup
1097void 2336void
1098schedule(...) 2337_pool_1 (SV *cb)
1099 PROTOTYPE:
1100 CODE: 2338 CODE:
1101 api_schedule (); 2339{
2340 struct coro *coro = SvSTATE (coro_current);
2341 HV *hv = (HV *)SvRV (coro_current);
2342 AV *defav = GvAV (PL_defgv);
2343 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2344 AV *invoke_av;
2345 int i, len;
2346
2347 if (!invoke)
2348 {
2349 SV *old = PL_diehook;
2350 PL_diehook = 0;
2351 SvREFCNT_dec (old);
2352 croak ("\3async_pool terminate\2\n");
2353 }
2354
2355 SvREFCNT_dec (coro->saved_deffh);
2356 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2357
2358 hv_store (hv, "desc", sizeof ("desc") - 1,
2359 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2360
2361 invoke_av = (AV *)SvRV (invoke);
2362 len = av_len (invoke_av);
2363
2364 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2365
2366 if (len > 0)
2367 {
2368 av_fill (defav, len - 1);
2369 for (i = 0; i < len; ++i)
2370 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2371 }
2372
2373 SvREFCNT_dec (invoke);
2374}
1102 2375
1103void 2376void
1104cede(...) 2377_pool_2 (SV *cb)
1105 PROTOTYPE:
1106 CODE: 2378 CODE:
1107 api_cede (); 2379{
2380 struct coro *coro = SvSTATE (coro_current);
1108 2381
1109# and these are hacks 2382 sv_setsv (cb, &PL_sv_undef);
2383
2384 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2385 coro->saved_deffh = 0;
2386
2387 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2388 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2389 {
2390 SV *old = PL_diehook;
2391 PL_diehook = 0;
2392 SvREFCNT_dec (old);
2393 croak ("\3async_pool terminate\2\n");
2394 }
2395
2396 av_clear (GvAV (PL_defgv));
2397 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2398 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2399
2400 coro->prio = 0;
2401
2402 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2403 api_trace (coro_current, 0);
2404
2405 av_push (av_async_pool, newSVsv (coro_current));
2406}
2407
2408#if 0
2409
2410void
2411_generator_call (...)
2412 PROTOTYPE: @
2413 PPCODE:
2414 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2415 xxxx
2416 abort ();
2417
1110SV * 2418SV *
1111_aio_get_state () 2419gensub (SV *sub, ...)
1112 CODE: 2420 PROTOTYPE: &;@
2421 CODE:
1113{ 2422{
1114 struct { 2423 struct coro *coro;
1115 int errorno; 2424 MAGIC *mg;
1116 int laststype; 2425 CV *xcv;
1117 int laststatval; 2426 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1118 Stat_t statcache; 2427 int i;
1119 } data;
1120 2428
1121 data.errorno = errno; 2429 CvGV (ncv) = CvGV (cv);
1122 data.laststype = PL_laststype; 2430 CvFILE (ncv) = CvFILE (cv);
1123 data.laststatval = PL_laststatval;
1124 data.statcache = PL_statcache;
1125 2431
1126 RETVAL = newSVpvn ((char *)&data, sizeof data); 2432 Newz (0, coro, 1, struct coro);
2433 coro->args = newAV ();
2434 coro->flags = CF_NEW;
2435
2436 av_extend (coro->args, items - 1);
2437 for (i = 1; i < items; i++)
2438 av_push (coro->args, newSVsv (ST (i)));
2439
2440 CvISXSUB_on (ncv);
2441 CvXSUBANY (ncv).any_ptr = (void *)coro;
2442
2443 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2444
2445 CvXSUB (ncv) = CvXSUB (xcv);
2446 CvANON_on (ncv);
2447
2448 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2449 RETVAL = newRV_noinc ((SV *)ncv);
1127} 2450}
1128 OUTPUT: 2451 OUTPUT:
1129 RETVAL 2452 RETVAL
1130 2453
2454#endif
2455
2456
2457MODULE = Coro::State PACKAGE = Coro::AIO
2458
1131void 2459void
1132_aio_set_state (char *data_) 2460_get_state (SV *self)
2461 PPCODE:
2462{
2463 AV *defav = GvAV (PL_defgv);
2464 AV *av = newAV ();
2465 int i;
2466 SV *data_sv = newSV (sizeof (struct io_state));
2467 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2468 SvCUR_set (data_sv, sizeof (struct io_state));
2469 SvPOK_only (data_sv);
2470
2471 data->errorno = errno;
2472 data->laststype = PL_laststype;
2473 data->laststatval = PL_laststatval;
2474 data->statcache = PL_statcache;
2475
2476 av_extend (av, AvFILLp (defav) + 1 + 1);
2477
2478 for (i = 0; i <= AvFILLp (defav); ++i)
2479 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2480
2481 av_push (av, data_sv);
2482
2483 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2484
2485 api_ready (self);
2486}
2487
2488void
2489_set_state (SV *state)
1133 PROTOTYPE: $ 2490 PROTOTYPE: $
2491 PPCODE:
2492{
2493 AV *av = (AV *)SvRV (state);
2494 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2495 int i;
2496
2497 errno = data->errorno;
2498 PL_laststype = data->laststype;
2499 PL_laststatval = data->laststatval;
2500 PL_statcache = data->statcache;
2501
2502 EXTEND (SP, AvFILLp (av));
2503 for (i = 0; i < AvFILLp (av); ++i)
2504 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2505}
2506
2507
2508MODULE = Coro::State PACKAGE = Coro::AnyEvent
2509
2510BOOT:
2511 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2512
2513SV *
2514_schedule (...)
2515 PROTOTYPE: @
1134 CODE: 2516 CODE:
1135{ 2517{
1136 struct { 2518 static int incede;
1137 int errorno;
1138 int laststype;
1139 int laststatval;
1140 Stat_t statcache;
1141 } *data = (void *)data_;
1142 2519
1143 errno = data->errorno; 2520 api_cede_notself ();
1144 PL_laststype = data->laststype; 2521
1145 PL_laststatval = data->laststatval; 2522 ++incede;
1146 PL_statcache = data->statcache; 2523 while (coro_nready >= incede && api_cede ())
2524 ;
2525
2526 sv_setsv (sv_activity, &PL_sv_undef);
2527 if (coro_nready >= incede)
2528 {
2529 PUSHMARK (SP);
2530 PUTBACK;
2531 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2532 SPAGAIN;
2533 }
2534
2535 --incede;
1147} 2536}
2537
2538
2539MODULE = Coro::State PACKAGE = PerlIO::cede
2540
2541BOOT:
2542 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2543

Diff Legend

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