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Comparing Coro/Coro/State.xs (file contents):
Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs.
Revision 1.245 by root, Mon Sep 22 05:40:21 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
8 9
9#include "patchlevel.h" 10#include "patchlevel.h"
10 11
11#if PERL_VERSION < 6 12#include <stdio.h>
13#include <errno.h>
14#include <assert.h>
15
16#ifdef WIN32
17# undef setjmp
18# undef longjmp
19# undef _exit
20# define setjmp _setjmp // deep magic, don't ask
21#else
22# include <inttypes.h> /* most portable stdint.h */
23#endif
24
25#ifdef HAVE_MMAP
26# include <unistd.h>
27# include <sys/mman.h>
28# ifndef MAP_ANONYMOUS
29# ifdef MAP_ANON
30# define MAP_ANONYMOUS MAP_ANON
31# else
32# undef HAVE_MMAP
33# endif
34# endif
35# include <limits.h>
36# ifndef PAGESIZE
37# define PAGESIZE pagesize
38# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
39static long pagesize;
40# else
41# define BOOT_PAGESIZE (void)0
42# endif
43#else
44# define PAGESIZE 0
45# define BOOT_PAGESIZE (void)0
46#endif
47
48#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif
54
55/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8
57
58#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
63
64#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 65# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 66# define PL_ppaddr ppaddr
14# endif 67# endif
15# ifndef call_sv 68# ifndef call_sv
16# define call_sv perl_call_sv 69# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 80# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 81# define IS_PADCONST(v) 0
29# endif 82# endif
30#endif 83#endif
31 84
32#include <errno.h> 85/* 5.8.8 */
33 86#ifndef GV_NOTQUAL
34#ifdef HAVE_MMAP 87# define GV_NOTQUAL 0
35# include <unistd.h>
36# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS
38# ifdef MAP_ANON
39# define MAP_ANONYMOUS MAP_ANON
40# else
41# undef HAVE_MMAP
42# endif
43# endif 88#endif
89#ifndef newSV
90# define newSV(l) NEWSV(0,l)
44#endif 91#endif
45 92
46#define SUB_INIT "Coro::State::initialize" 93/* 5.11 */
47#define UCORO_STATE "_coro_state" 94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
48 97
49/* The next macro should declare a variable stacklevel that contains and approximation 98/* 5.8.7 */
50 * to the current C stack pointer. Its property is that it changes with each call 99#ifndef SvRV_set
51 * and should be unique. */ 100# define SvRV_set(s,v) SvRV(s) = (v)
101#endif
102
103#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
104# undef CORO_STACKGUARD
105#endif
106
107#ifndef CORO_STACKGUARD
108# define CORO_STACKGUARD 0
109#endif
110
111/* prefer perl internal functions over our own? */
112#ifndef CORO_PREFER_PERL_FUNCTIONS
113# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif
115
116/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */
118#define dSTACKLEVEL volatile char stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 119#define STACKLEVEL ((void *)&stacklevel)
53 120
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
55 122
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 123#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value))
127#else
128# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr)
131#endif
132
133#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1)
135
136#define NOINLINE attribute ((noinline))
57 137
58#include "CoroAPI.h" 138#include "CoroAPI.h"
59 139
60#ifdef USE_ITHREADS 140#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 141static perl_mutex coro_mutex;
… …
64#else 144#else
65# define LOCK (void)0 145# define LOCK (void)0
66# define UNLOCK (void)0 146# define UNLOCK (void)0
67#endif 147#endif
68 148
149/* helper storage struct for Coro::AIO */
150struct io_state
151{
152 int errorno;
153 I32 laststype;
154 int laststatval;
155 Stat_t statcache;
156};
157
158static size_t coro_stacksize = CORO_STACKSIZE;
69static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 160static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env;
71static HV *coro_state_stash; 162static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 163static volatile SV *coro_mortal; /* will be freed after next transfer */
75 164
76/* this is actually not only the c stack but also c registers etc... */ 165static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook;
168static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */
170
171/* async_pool helper stuff */
172static SV *sv_pool_rss;
173static SV *sv_pool_size;
174static AV *av_async_pool;
175
176/* Coro::AnyEvent */
177static SV *sv_activity;
178
179static struct coro_cctx *cctx_first;
180static int cctx_count, cctx_idle;
181
182enum {
183 CC_MAPPED = 0x01,
184 CC_NOREUSE = 0x02, /* throw this away after tracing */
185 CC_TRACE = 0x04,
186 CC_TRACE_SUB = 0x08, /* trace sub calls */
187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189};
190
191/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx {
193 struct coro_cctx *next;
194
195 /* the stack */
196 void *sptr;
197 size_t ssize;
198
199 /* cpu state */
200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202 JMPENV *top_env;
203 coro_context cctx;
204
205#if CORO_USE_VALGRIND
206 int valgrind_id;
207#endif
208 unsigned char flags;
209} coro_cctx;
210
211enum {
212 CF_RUNNING = 0x0001, /* coroutine is running */
213 CF_READY = 0x0002, /* coroutine is ready */
214 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216};
217
218/* the structure where most of the perl state is stored, overlaid on the cxstack */
77typedef struct { 219typedef struct {
78 int refcnt; /* pointer reference counter */ 220 SV *defsv;
79 int usecnt; /* shared by how many coroutines */ 221 AV *defav;
80 int gencnt; /* generation counter */ 222 SV *errsv;
223 SV *irsgv;
224#define VAR(name,type) type name;
225# include "state.h"
226#undef VAR
227} perl_slots;
81 228
82 coro_context cctx; 229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
83 230
84 void *sptr; 231/* this is a structure representing a perl-level coroutine */
85 long ssize; /* positive == mmap, otherwise malloc */
86} coro_stack;
87
88struct coro { 232struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 233 /* the c coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 234 coro_cctx *cctx;
91 235
92 /* the optional C context */ 236 /* process data */
93 coro_stack *stack;
94 void *cursp;
95 int gencnt;
96
97 /* optionally saved, might be zero */
98 AV *defav;
99 SV *defsv;
100 SV *errsv;
101
102 /* saved global state not related to stacks */
103 U8 dowarn;
104 I32 in_eval;
105
106 /* the stacks and related info (callchain etc..) */
107 PERL_SI *curstackinfo;
108 AV *curstack;
109 AV *mainstack; 237 AV *mainstack;
110 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 CV *compcv;
115 SV **stack_base;
116 SV **stack_max;
117 SV **tmps_stack;
118 I32 tmps_floor;
119 I32 tmps_ix;
120 I32 tmps_max;
121 I32 *markstack;
122 I32 *markstack_ptr;
123 I32 *markstack_max;
124 I32 *scopestack;
125 I32 scopestack_ix;
126 I32 scopestack_max;
127 ANY *savestack;
128 I32 savestack_ix;
129 I32 savestack_max;
130 OP **retstack;
131 I32 retstack_ix;
132 I32 retstack_max;
133 PMOP *curpm;
134 COP *curcop;
135 JMPENV *top_env;
136 239
137 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
138 AV *args; 241 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */
244
245 /* statistics */
246 int usecount; /* number of transfers to this coro */
247
248 /* coro process data */
249 int prio;
250 SV *throw; /* exception to be thrown */
251
252 /* async_pool */
253 SV *saved_deffh;
254
255 /* linked list */
256 struct coro *next, *prev;
139}; 257};
140 258
141typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
142typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
143 261
262/** Coro ********************************************************************/
263
264#define PRIO_MAX 3
265#define PRIO_HIGH 1
266#define PRIO_NORMAL 0
267#define PRIO_LOW -1
268#define PRIO_IDLE -3
269#define PRIO_MIN -4
270
271/* for Coro.pm */
272static SV *coro_current;
273static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
275static int coro_nready;
276static struct coro *coro_first;
277
278/** lowlevel stuff **********************************************************/
279
280static SV *
281coro_get_sv (pTHX_ const char *name, int create)
282{
283#if PERL_VERSION_ATLEAST (5,10,0)
284 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
285 get_sv (name, create);
286#endif
287 return get_sv (name, create);
288}
289
290static AV *
291coro_get_av (pTHX_ const char *name, int create)
292{
293#if PERL_VERSION_ATLEAST (5,10,0)
294 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
295 get_av (name, create);
296#endif
297 return get_av (name, create);
298}
299
300static HV *
301coro_get_hv (pTHX_ const char *name, int create)
302{
303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_hv (name, create);
306#endif
307 return get_hv (name, create);
308}
309
144static AV * 310static AV *
145coro_clone_padlist (pTHX_ CV *cv) 311coro_clone_padlist (pTHX_ CV *cv)
146{ 312{
147 AV *padlist = CvPADLIST (cv); 313 AV *padlist = CvPADLIST (cv);
148 AV *newpadlist, *newpad; 314 AV *newpadlist, *newpad;
149 315
150 newpadlist = newAV (); 316 newpadlist = newAV ();
151 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
318#if PERL_VERSION_ATLEAST (5,10,0)
319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
320#else
152 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif
153 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
154 --AvFILLp (padlist); 324 --AvFILLp (padlist);
155 325
156 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
157 av_store (newpadlist, 1, (SV *)newpad); 327 av_store (newpadlist, 1, (SV *)newpad);
… …
191 361
192 /* casting is fun. */ 362 /* casting is fun. */
193 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
194 free_padlist (aTHX_ padlist); 364 free_padlist (aTHX_ padlist);
195 365
196 SvREFCNT_dec (av); 366 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
197 367
198 return 0; 368 return 0;
199} 369}
200 370
201#define PERL_MAGIC_coro PERL_MAGIC_ext 371#define CORO_MAGIC_type_cv PERL_MAGIC_ext
372#define CORO_MAGIC_type_state PERL_MAGIC_ext
202 373
203static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 374static MGVTBL coro_cv_vtbl = {
375 0, 0, 0, 0,
376 coro_cv_free
377};
378
379#define CORO_MAGIC(sv,type) \
380 SvMAGIC (sv) \
381 ? SvMAGIC (sv)->mg_type == type \
382 ? SvMAGIC (sv) \
383 : mg_find (sv, type) \
384 : 0
385
386#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
387#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
388
389static struct coro *
390SvSTATE_ (pTHX_ SV *coro)
391{
392 HV *stash;
393 MAGIC *mg;
394
395 if (SvROK (coro))
396 coro = SvRV (coro);
397
398 if (expect_false (SvTYPE (coro) != SVt_PVHV))
399 croak ("Coro::State object required");
400
401 stash = SvSTASH (coro);
402 if (expect_false (stash != coro_stash && stash != coro_state_stash))
403 {
404 /* very slow, but rare, check */
405 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
406 croak ("Coro::State object required");
407 }
408
409 mg = CORO_MAGIC_state (coro);
410 return (struct coro *)mg->mg_ptr;
411}
412
413#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
204 414
205/* the next two functions merely cache the padlists */ 415/* the next two functions merely cache the padlists */
206static void 416static void
207get_padlist (pTHX_ CV *cv) 417get_padlist (pTHX_ CV *cv)
208{ 418{
209 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 419 MAGIC *mg = CORO_MAGIC_cv (cv);
420 AV *av;
210 421
211 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 422 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
212 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 423 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
213 else 424 else
214 { 425 {
215#if 0 426#if CORO_PREFER_PERL_FUNCTIONS
216 /* this should work - but it doesn't :( */ 427 /* this is probably cleaner? but also slower! */
428 /* in practise, it seems to be less stable */
217 CV *cp = Perl_cv_clone (aTHX_ cv); 429 CV *cp = Perl_cv_clone (cv);
218 CvPADLIST (cv) = CvPADLIST (cp); 430 CvPADLIST (cv) = CvPADLIST (cp);
219 CvPADLIST (cp) = 0; 431 CvPADLIST (cp) = 0;
220 SvREFCNT_dec (cp); 432 SvREFCNT_dec (cp);
221#else 433#else
222 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 434 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
225} 437}
226 438
227static void 439static void
228put_padlist (pTHX_ CV *cv) 440put_padlist (pTHX_ CV *cv)
229{ 441{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 442 MAGIC *mg = CORO_MAGIC_cv (cv);
443 AV *av;
231 444
232 if (!mg) 445 if (expect_false (!mg))
233 { 446 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
234 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
235 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
236 mg->mg_virtual = &vtbl_coro;
237 mg->mg_obj = (SV *)newAV ();
238 }
239 447
240 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 448 av = (AV *)mg->mg_obj;
241}
242 449
243#define SB do { 450 if (expect_false (AvFILLp (av) >= AvMAX (av)))
244#define SE } while (0) 451 av_extend (av, AvMAX (av) + 1);
245 452
246#define LOAD(state) load_state(aTHX_ (state)); 453 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
247#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 454}
248 455
249#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 456/** load & save, init *******************************************************/
250 457
251static void 458static void
252load_state(pTHX_ Coro__State c) 459load_perl (pTHX_ Coro__State c)
253{ 460{
254 PL_dowarn = c->dowarn; 461 perl_slots *slot = c->slot;
255 PL_in_eval = c->in_eval; 462 c->slot = 0;
256 463
257 PL_curstackinfo = c->curstackinfo;
258 PL_curstack = c->curstack;
259 PL_mainstack = c->mainstack; 464 PL_mainstack = c->mainstack;
260 PL_stack_sp = c->stack_sp;
261 PL_op = c->op;
262 PL_curpad = c->curpad;
263 PL_comppad = c->comppad;
264 PL_compcv = c->compcv;
265 PL_stack_base = c->stack_base;
266 PL_stack_max = c->stack_max;
267 PL_tmps_stack = c->tmps_stack;
268 PL_tmps_floor = c->tmps_floor;
269 PL_tmps_ix = c->tmps_ix;
270 PL_tmps_max = c->tmps_max;
271 PL_markstack = c->markstack;
272 PL_markstack_ptr = c->markstack_ptr;
273 PL_markstack_max = c->markstack_max;
274 PL_scopestack = c->scopestack;
275 PL_scopestack_ix = c->scopestack_ix;
276 PL_scopestack_max = c->scopestack_max;
277 PL_savestack = c->savestack;
278 PL_savestack_ix = c->savestack_ix;
279 PL_savestack_max = c->savestack_max;
280#if PERL_VERSION < 9
281 PL_retstack = c->retstack;
282 PL_retstack_ix = c->retstack_ix;
283 PL_retstack_max = c->retstack_max;
284#endif
285 PL_curpm = c->curpm;
286 PL_curcop = c->curcop;
287 PL_top_env = c->top_env;
288 465
289 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 466 GvSV (PL_defgv) = slot->defsv;
290 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 467 GvAV (PL_defgv) = slot->defav;
291 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 468 GvSV (PL_errgv) = slot->errsv;
469 GvSV (irsgv) = slot->irsgv;
470
471 #define VAR(name,type) PL_ ## name = slot->name;
472 # include "state.h"
473 #undef VAR
292 474
293 { 475 {
294 dSP; 476 dSP;
477
295 CV *cv; 478 CV *cv;
296 479
297 /* now do the ugly restore mess */ 480 /* now do the ugly restore mess */
298 while ((cv = (CV *)POPs)) 481 while (expect_true (cv = (CV *)POPs))
299 { 482 {
300 AV *padlist = (AV *)POPs;
301
302 if (padlist)
303 {
304 put_padlist (aTHX_ cv); /* mark this padlist as available */ 483 put_padlist (aTHX_ cv); /* mark this padlist as available */
305 CvPADLIST(cv) = padlist; 484 CvDEPTH (cv) = PTR2IV (POPs);
306 } 485 CvPADLIST (cv) = (AV *)POPs;
307
308 ++CvDEPTH(cv);
309 } 486 }
310 487
311 PUTBACK; 488 PUTBACK;
312 } 489 }
313} 490}
314 491
315static void 492static void
316save_state(pTHX_ Coro__State c, int flags) 493save_perl (pTHX_ Coro__State c)
317{ 494{
318 { 495 {
319 dSP; 496 dSP;
320 I32 cxix = cxstack_ix; 497 I32 cxix = cxstack_ix;
321 PERL_CONTEXT *ccstk = cxstack; 498 PERL_CONTEXT *ccstk = cxstack;
… …
324 /* 501 /*
325 * the worst thing you can imagine happens first - we have to save 502 * the worst thing you can imagine happens first - we have to save
326 * (and reinitialize) all cv's in the whole callchain :( 503 * (and reinitialize) all cv's in the whole callchain :(
327 */ 504 */
328 505
329 PUSHs (Nullsv); 506 XPUSHs (Nullsv);
330 /* this loop was inspired by pp_caller */ 507 /* this loop was inspired by pp_caller */
331 for (;;) 508 for (;;)
332 { 509 {
333 while (cxix >= 0) 510 while (expect_true (cxix >= 0))
334 { 511 {
335 PERL_CONTEXT *cx = &ccstk[cxix--]; 512 PERL_CONTEXT *cx = &ccstk[cxix--];
336 513
337 if (CxTYPE(cx) == CXt_SUB) 514 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
338 { 515 {
339 CV *cv = cx->blk_sub.cv; 516 CV *cv = cx->blk_sub.cv;
517
340 if (CvDEPTH(cv)) 518 if (expect_true (CvDEPTH (cv)))
341 { 519 {
342 EXTEND (SP, CvDEPTH(cv)*2); 520 EXTEND (SP, 3);
343
344 while (--CvDEPTH(cv))
345 {
346 /* this tells the restore code to increment CvDEPTH */
347 PUSHs (Nullsv);
348 PUSHs ((SV *)cv);
349 }
350
351 PUSHs ((SV *)CvPADLIST(cv)); 521 PUSHs ((SV *)CvPADLIST (cv));
522 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
352 PUSHs ((SV *)cv); 523 PUSHs ((SV *)cv);
353 524
525 CvDEPTH (cv) = 0;
354 get_padlist (aTHX_ cv); 526 get_padlist (aTHX_ cv);
355 } 527 }
356 } 528 }
357#ifdef CXt_FORMAT
358 else if (CxTYPE(cx) == CXt_FORMAT)
359 {
360 /* I never used formats, so how should I know how these are implemented? */
361 /* my bold guess is as a simple, plain sub... */
362 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
363 }
364#endif
365 } 529 }
366 530
367 if (top_si->si_type == PERLSI_MAIN) 531 if (expect_true (top_si->si_type == PERLSI_MAIN))
368 break; 532 break;
369 533
370 top_si = top_si->si_prev; 534 top_si = top_si->si_prev;
371 ccstk = top_si->si_cxstack; 535 ccstk = top_si->si_cxstack;
372 cxix = top_si->si_cxix; 536 cxix = top_si->si_cxix;
373 } 537 }
374 538
375 PUTBACK; 539 PUTBACK;
376 } 540 }
377 541
378 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 542 /* allocate some space on the context stack for our purposes */
379 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 543 /* we manually unroll here, as usually 2 slots is enough */
380 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 544 if (SLOT_COUNT >= 1) CXINC;
545 if (SLOT_COUNT >= 2) CXINC;
546 if (SLOT_COUNT >= 3) CXINC;
547 {
548 int i;
549 for (i = 3; i < SLOT_COUNT; ++i)
550 CXINC;
551 }
552 cxstack_ix -= SLOT_COUNT; /* undo allocation */
381 553
382 c->dowarn = PL_dowarn;
383 c->in_eval = PL_in_eval;
384
385 c->curstackinfo = PL_curstackinfo;
386 c->curstack = PL_curstack;
387 c->mainstack = PL_mainstack; 554 c->mainstack = PL_mainstack;
388 c->stack_sp = PL_stack_sp; 555
389 c->op = PL_op; 556 {
390 c->curpad = PL_curpad; 557 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
391 c->comppad = PL_comppad; 558
392 c->compcv = PL_compcv; 559 slot->defav = GvAV (PL_defgv);
393 c->stack_base = PL_stack_base; 560 slot->defsv = DEFSV;
394 c->stack_max = PL_stack_max; 561 slot->errsv = ERRSV;
395 c->tmps_stack = PL_tmps_stack; 562 slot->irsgv = GvSV (irsgv);
396 c->tmps_floor = PL_tmps_floor; 563
397 c->tmps_ix = PL_tmps_ix; 564 #define VAR(name,type) slot->name = PL_ ## name;
398 c->tmps_max = PL_tmps_max; 565 # include "state.h"
399 c->markstack = PL_markstack; 566 #undef VAR
400 c->markstack_ptr = PL_markstack_ptr; 567 }
401 c->markstack_max = PL_markstack_max;
402 c->scopestack = PL_scopestack;
403 c->scopestack_ix = PL_scopestack_ix;
404 c->scopestack_max = PL_scopestack_max;
405 c->savestack = PL_savestack;
406 c->savestack_ix = PL_savestack_ix;
407 c->savestack_max = PL_savestack_max;
408#if PERL_VERSION < 9
409 c->retstack = PL_retstack;
410 c->retstack_ix = PL_retstack_ix;
411 c->retstack_max = PL_retstack_max;
412#endif
413 c->curpm = PL_curpm;
414 c->curcop = PL_curcop;
415 c->top_env = PL_top_env;
416} 568}
417 569
418/* 570/*
419 * allocate various perl stacks. This is an exact copy 571 * allocate various perl stacks. This is an exact copy
420 * of perl.c:init_stacks, except that it uses less memory 572 * of perl.c:init_stacks, except that it uses less memory
421 * on the (sometimes correct) assumption that coroutines do 573 * on the (sometimes correct) assumption that coroutines do
422 * not usually need a lot of stackspace. 574 * not usually need a lot of stackspace.
423 */ 575 */
576#if CORO_PREFER_PERL_FUNCTIONS
577# define coro_init_stacks init_stacks
578#else
424static void 579static void
425coro_init_stacks (pTHX) 580coro_init_stacks (pTHX)
426{ 581{
427 LOCK; 582 PL_curstackinfo = new_stackinfo(32, 8);
428
429 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
430 PL_curstackinfo->si_type = PERLSI_MAIN; 583 PL_curstackinfo->si_type = PERLSI_MAIN;
431 PL_curstack = PL_curstackinfo->si_stack; 584 PL_curstack = PL_curstackinfo->si_stack;
432 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 585 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
433 586
434 PL_stack_base = AvARRAY(PL_curstack); 587 PL_stack_base = AvARRAY(PL_curstack);
435 PL_stack_sp = PL_stack_base; 588 PL_stack_sp = PL_stack_base;
436 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 589 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
437 590
438 New(50,PL_tmps_stack,96,SV*); 591 New(50,PL_tmps_stack,32,SV*);
439 PL_tmps_floor = -1; 592 PL_tmps_floor = -1;
440 PL_tmps_ix = -1; 593 PL_tmps_ix = -1;
441 PL_tmps_max = 96; 594 PL_tmps_max = 32;
442 595
443 New(54,PL_markstack,16,I32); 596 New(54,PL_markstack,16,I32);
444 PL_markstack_ptr = PL_markstack; 597 PL_markstack_ptr = PL_markstack;
445 PL_markstack_max = PL_markstack + 16; 598 PL_markstack_max = PL_markstack + 16;
446 599
447#ifdef SET_MARK_OFFSET 600#ifdef SET_MARK_OFFSET
448 SET_MARK_OFFSET; 601 SET_MARK_OFFSET;
449#endif 602#endif
450 603
451 New(54,PL_scopestack,16,I32); 604 New(54,PL_scopestack,8,I32);
452 PL_scopestack_ix = 0; 605 PL_scopestack_ix = 0;
453 PL_scopestack_max = 16; 606 PL_scopestack_max = 8;
454 607
455 New(54,PL_savestack,96,ANY); 608 New(54,PL_savestack,24,ANY);
456 PL_savestack_ix = 0; 609 PL_savestack_ix = 0;
457 PL_savestack_max = 96; 610 PL_savestack_max = 24;
458 611
459#if PERL_VERSION < 9 612#if !PERL_VERSION_ATLEAST (5,10,0)
460 New(54,PL_retstack,8,OP*); 613 New(54,PL_retstack,4,OP*);
461 PL_retstack_ix = 0; 614 PL_retstack_ix = 0;
462 PL_retstack_max = 8; 615 PL_retstack_max = 4;
463#endif 616#endif
464
465 UNLOCK;
466} 617}
618#endif
467 619
468/* 620/*
469 * destroy the stacks, the callchain etc... 621 * destroy the stacks, the callchain etc...
470 */ 622 */
471static void 623static void
472destroy_stacks(pTHX) 624coro_destroy_stacks (pTHX)
473{ 625{
474 if (!IN_DESTRUCT)
475 {
476 /* is this ugly, I ask? */
477 LEAVE_SCOPE (0);
478
479 /* sure it is, but more important: is it correct?? :/ */
480 FREETMPS;
481
482 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
483 }
484
485 while (PL_curstackinfo->si_next) 626 while (PL_curstackinfo->si_next)
486 PL_curstackinfo = PL_curstackinfo->si_next; 627 PL_curstackinfo = PL_curstackinfo->si_next;
487 628
488 while (PL_curstackinfo) 629 while (PL_curstackinfo)
489 { 630 {
490 PERL_SI *p = PL_curstackinfo->si_prev; 631 PERL_SI *p = PL_curstackinfo->si_prev;
491 632
492 { /*D*//*remove*/
493 dSP;
494 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
495 PUTBACK; /* possibly superfluous */
496 }
497
498 if (!IN_DESTRUCT) 633 if (!IN_DESTRUCT)
499 {
500 dounwind (-1);/*D*//*remove*/
501 SvREFCNT_dec (PL_curstackinfo->si_stack); 634 SvREFCNT_dec (PL_curstackinfo->si_stack);
502 }
503 635
504 Safefree (PL_curstackinfo->si_cxstack); 636 Safefree (PL_curstackinfo->si_cxstack);
505 Safefree (PL_curstackinfo); 637 Safefree (PL_curstackinfo);
506 PL_curstackinfo = p; 638 PL_curstackinfo = p;
507 } 639 }
508 640
509 Safefree (PL_tmps_stack); 641 Safefree (PL_tmps_stack);
510 Safefree (PL_markstack); 642 Safefree (PL_markstack);
511 Safefree (PL_scopestack); 643 Safefree (PL_scopestack);
512 Safefree (PL_savestack); 644 Safefree (PL_savestack);
513#if PERL_VERSION < 9 645#if !PERL_VERSION_ATLEAST (5,10,0)
514 Safefree (PL_retstack); 646 Safefree (PL_retstack);
515#endif 647#endif
516} 648}
517 649
650static size_t
651coro_rss (pTHX_ struct coro *coro)
652{
653 size_t rss = sizeof (*coro);
654
655 if (coro->mainstack)
656 {
657 perl_slots tmp_slot;
658 perl_slots *slot;
659
660 if (coro->flags & CF_RUNNING)
661 {
662 slot = &tmp_slot;
663
664 #define VAR(name,type) slot->name = PL_ ## name;
665 # include "state.h"
666 #undef VAR
667 }
668 else
669 slot = coro->slot;
670
671 if (slot)
672 {
673 rss += sizeof (slot->curstackinfo);
674 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
675 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
676 rss += slot->tmps_max * sizeof (SV *);
677 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
678 rss += slot->scopestack_max * sizeof (I32);
679 rss += slot->savestack_max * sizeof (ANY);
680
681#if !PERL_VERSION_ATLEAST (5,10,0)
682 rss += slot->retstack_max * sizeof (OP *);
683#endif
684 }
685 }
686
687 return rss;
688}
689
690/** coroutine stack handling ************************************************/
691
692static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
693static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
694static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
695
696/* apparently < 5.8.8 */
697#ifndef MgPV_nolen_const
698#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
699 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
700 (const char*)(mg)->mg_ptr)
701#endif
702
703/*
704 * This overrides the default magic get method of %SIG elements.
705 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
706 * and instead of tryign to save and restore the hash elements, we just provide
707 * readback here.
708 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
709 * not expecting this to actually change the hook. This is a potential problem
710 * when a schedule happens then, but we ignore this.
711 */
712static int
713coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
714{
715 const char *s = MgPV_nolen_const (mg);
716
717 if (*s == '_')
718 {
719 SV **svp = 0;
720
721 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
722 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
723
724 if (svp)
725 {
726 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
727 return 0;
728 }
729 }
730
731 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
732}
733
734static int
735coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
736{
737 const char *s = MgPV_nolen_const (mg);
738
739 if (*s == '_')
740 {
741 SV **svp = 0;
742
743 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
744 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
745
746 if (svp)
747 {
748 SV *old = *svp;
749 *svp = 0;
750 SvREFCNT_dec (old);
751 return 0;
752 }
753 }
754
755 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
756}
757
758static int
759coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
760{
761 const char *s = MgPV_nolen_const (mg);
762
763 if (*s == '_')
764 {
765 SV **svp = 0;
766
767 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
768 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
769
770 if (svp)
771 {
772 SV *old = *svp;
773 *svp = newSVsv (sv);
774 SvREFCNT_dec (old);
775 return 0;
776 }
777 }
778
779 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
780}
781
518static void 782static void
519allocate_stack (Coro__State ctx, int alloc) 783coro_setup (pTHX_ struct coro *coro)
520{
521 coro_stack *stack;
522
523 New (0, stack, 1, coro_stack);
524
525 stack->refcnt = 1;
526 stack->usecnt = 1;
527 stack->gencnt = ctx->gencnt = 0;
528
529 if (alloc)
530 {
531#if HAVE_MMAP
532 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
533 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
534 if (stack->sptr == (void *)-1)
535#endif
536 {
537 stack->ssize = - (STACKSIZE * (long)sizeof (long));
538 New (0, stack->sptr, STACKSIZE, long);
539 }
540 }
541 else
542 stack->sptr = 0;
543
544 ctx->stack = stack;
545}
546
547static void
548deallocate_stack (Coro__State ctx)
549{
550 coro_stack *stack = ctx->stack;
551
552 ctx->stack = 0;
553
554 if (stack)
555 {
556 if (!--stack->refcnt)
557 {
558#ifdef HAVE_MMAP
559 if (stack->ssize > 0 && stack->sptr)
560 munmap (stack->sptr, stack->ssize);
561 else
562#endif
563 Safefree (stack->sptr);
564
565 Safefree (stack);
566 }
567 else if (ctx->gencnt == stack->gencnt)
568 --stack->usecnt;
569 }
570}
571
572static void
573setup_coro (void *arg)
574{ 784{
575 /* 785 /*
576 * emulate part of the perl startup here. 786 * emulate part of the perl startup here.
577 */ 787 */
578 dTHX;
579 dSP;
580 Coro__State ctx = (Coro__State)arg;
581 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
582
583 coro_init_stacks (aTHX); 788 coro_init_stacks (aTHX);
584 /*PL_curcop = 0;*/ 789
585 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 790 PL_runops = RUNOPS_DEFAULT;
791 PL_curcop = &PL_compiling;
792 PL_in_eval = EVAL_NULL;
793 PL_comppad = 0;
794 PL_curpm = 0;
795 PL_curpad = 0;
796 PL_localizing = 0;
797 PL_dirty = 0;
798 PL_restartop = 0;
799#if PERL_VERSION_ATLEAST (5,10,0)
800 PL_parser = 0;
801#endif
802
803 /* recreate the die/warn hooks */
804 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
805 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
806
807 GvSV (PL_defgv) = newSV (0);
808 GvAV (PL_defgv) = coro->args; coro->args = 0;
809 GvSV (PL_errgv) = newSV (0);
810 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
811 PL_rs = newSVsv (GvSV (irsgv));
812 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
813
814 {
815 dSP;
816 LOGOP myop;
817
818 Zero (&myop, 1, LOGOP);
819 myop.op_next = Nullop;
820 myop.op_flags = OPf_WANT_VOID;
821
822 PUSHMARK (SP);
823 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
824 PUTBACK;
825 PL_op = (OP *)&myop;
826 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
827 SPAGAIN;
828 }
829
830 /* this newly created coroutine might be run on an existing cctx which most
831 * likely was suspended in set_stacklevel, called from entersub.
832 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
833 * so we ENTER here for symmetry
834 */
835 ENTER;
836}
837
838static void
839coro_destroy (pTHX_ struct coro *coro)
840{
841 if (!IN_DESTRUCT)
842 {
843 /* restore all saved variables and stuff */
844 LEAVE_SCOPE (0);
845 assert (PL_tmps_floor == -1);
846
847 /* free all temporaries */
848 FREETMPS;
849 assert (PL_tmps_ix == -1);
850
851 /* unwind all extra stacks */
852 POPSTACK_TO (PL_mainstack);
853
854 /* unwind main stack */
855 dounwind (-1);
856 }
857
858 SvREFCNT_dec (GvSV (PL_defgv));
586 SvREFCNT_dec (GvAV (PL_defgv)); 859 SvREFCNT_dec (GvAV (PL_defgv));
587 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 860 SvREFCNT_dec (GvSV (PL_errgv));
861 SvREFCNT_dec (PL_defoutgv);
862 SvREFCNT_dec (PL_rs);
863 SvREFCNT_dec (GvSV (irsgv));
588 864
589 SPAGAIN; 865 SvREFCNT_dec (PL_diehook);
866 SvREFCNT_dec (PL_warnhook);
867
868 SvREFCNT_dec (coro->saved_deffh);
869 SvREFCNT_dec (coro->throw);
590 870
591 if (ctx->stack) 871 coro_destroy_stacks (aTHX);
592 {
593 ctx->cursp = 0;
594
595 PUSHMARK(SP);
596 PUTBACK;
597 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
598
599 if (SvTRUE (ERRSV))
600 croak (NULL);
601 else
602 croak ("FATAL: CCTXT coroutine returned!");
603 }
604 else
605 {
606 UNOP myop;
607
608 PL_op = (OP *)&myop;
609
610 Zero(&myop, 1, UNOP);
611 myop.op_next = Nullop;
612 myop.op_flags = OPf_WANT_VOID;
613
614 PUSHMARK(SP);
615 XPUSHs (sub_init);
616 /*
617 * the next line is slightly wrong, as PL_op->op_next
618 * is actually being executed so we skip the first op.
619 * that doesn't matter, though, since it is only
620 * pp_nextstate and we never return...
621 * ah yes, and I don't care anyways ;)
622 */
623 PUTBACK;
624 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
625 SPAGAIN;
626
627 ENTER; /* necessary e.g. for dounwind */
628 }
629} 872}
630 873
631static void 874static void
632continue_coro (void *arg) 875free_coro_mortal (pTHX)
633{ 876{
634 /* 877 if (expect_true (coro_mortal))
635 * this is a _very_ stripped down perl interpreter ;) 878 {
636 */ 879 SvREFCNT_dec (coro_mortal);
637 dTHX; 880 coro_mortal = 0;
638 Coro__State ctx = (Coro__State)arg;
639
640 PL_top_env = &ctx->start_env;
641
642 ctx->cursp = 0;
643 PL_op = PL_op->op_next;
644 CALLRUNOPS(aTHX);
645
646 abort ();
647}
648
649static void
650transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
651{
652 dSTACKLEVEL;
653
654 if (prev != next)
655 { 881 }
656 if (next->mainstack) 882}
883
884static int
885runops_trace (pTHX)
886{
887 COP *oldcop = 0;
888 int oldcxix = -2;
889 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
890 coro_cctx *cctx = coro->cctx;
891
892 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
893 {
894 PERL_ASYNC_CHECK ();
895
896 if (cctx->flags & CC_TRACE_ALL)
657 { 897 {
658 LOCK; 898 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
659 SAVE (prev, flags);
660 LOAD (next);
661 UNLOCK;
662
663 /* mark this state as in-use */
664 next->mainstack = 0;
665 next->tmps_ix = -2;
666
667 /* stacklevel changed? if yes, grab the stack for us! */
668 if (flags & TRANSFER_SAVE_CCTXT)
669 { 899 {
670 if (!prev->stack) 900 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
671 allocate_stack (prev, 0); 901 SV **bot, **top;
672 else if (prev->cursp != stacklevel 902 AV *av = newAV (); /* return values */
673 && prev->stack->usecnt > 1) 903 SV **cb;
904 dSP;
905
906 GV *gv = CvGV (cx->blk_sub.cv);
907 SV *fullname = sv_2mortal (newSV (0));
908 if (isGV (gv))
909 gv_efullname3 (fullname, gv, 0);
910
911 bot = PL_stack_base + cx->blk_oldsp + 1;
912 top = cx->blk_gimme == G_ARRAY ? SP + 1
913 : cx->blk_gimme == G_SCALAR ? bot + 1
914 : bot;
915
916 av_extend (av, top - bot);
917 while (bot < top)
918 av_push (av, SvREFCNT_inc (*bot++));
919
920 PL_runops = RUNOPS_DEFAULT;
921 ENTER;
922 SAVETMPS;
923 EXTEND (SP, 3);
924 PUSHMARK (SP);
925 PUSHs (&PL_sv_no);
926 PUSHs (fullname);
927 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
928 PUTBACK;
929 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
930 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
931 SPAGAIN;
932 FREETMPS;
933 LEAVE;
934 PL_runops = runops_trace;
935 }
936
937 if (oldcop != PL_curcop)
938 {
939 oldcop = PL_curcop;
940
941 if (PL_curcop != &PL_compiling)
674 { 942 {
675 prev->gencnt = ++prev->stack->gencnt; 943 SV **cb;
676 prev->stack->usecnt = 1;
677 }
678 944
679 /* has our stack been invalidated? */ 945 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
680 if (next->stack && next->stack->gencnt != next->gencnt)
681 { 946 {
682 deallocate_stack (next); 947 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
683 allocate_stack (next, 1); 948
684 coro_create (&(next->stack->cctx), 949 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
685 continue_coro, (void *)next, 950 {
686 next->stack->sptr, labs (next->stack->ssize)); 951 runops_proc_t old_runops = PL_runops;
952 dSP;
953 GV *gv = CvGV (cx->blk_sub.cv);
954 SV *fullname = sv_2mortal (newSV (0));
955
956 if (isGV (gv))
957 gv_efullname3 (fullname, gv, 0);
958
959 PL_runops = RUNOPS_DEFAULT;
960 ENTER;
961 SAVETMPS;
962 EXTEND (SP, 3);
963 PUSHMARK (SP);
964 PUSHs (&PL_sv_yes);
965 PUSHs (fullname);
966 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
967 PUTBACK;
968 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
969 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
970 SPAGAIN;
971 FREETMPS;
972 LEAVE;
973 PL_runops = runops_trace;
974 }
975
976 oldcxix = cxstack_ix;
687 } 977 }
688 978
689 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 979 if (cctx->flags & CC_TRACE_LINE)
690 prev->cursp = stacklevel;
691 /* don't add any code here */
692 }
693 else
694 next->cursp = stacklevel;
695 }
696 else if (next->tmps_ix == -2)
697 croak ("tried to transfer to running coroutine");
698 else
699 {
700 LOCK;
701 SAVE (prev, -1); /* first get rid of the old state */
702 UNLOCK;
703
704 if (flags & TRANSFER_SAVE_CCTXT)
705 {
706 if (!prev->stack)
707 allocate_stack (prev, 0);
708
709 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
710 { 980 {
711 PL_top_env = &next->start_env; 981 dSP;
712 982
713 setup_coro (next); 983 PL_runops = RUNOPS_DEFAULT;
714 next->cursp = stacklevel; 984 ENTER;
715 985 SAVETMPS;
716 prev->stack->refcnt++; 986 EXTEND (SP, 3);
717 prev->stack->usecnt++; 987 PL_runops = RUNOPS_DEFAULT;
718 next->stack = prev->stack; 988 PUSHMARK (SP);
719 next->gencnt = prev->gencnt; 989 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
990 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
991 PUTBACK;
992 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
993 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
994 SPAGAIN;
995 FREETMPS;
996 LEAVE;
997 PL_runops = runops_trace;
720 } 998 }
721 else
722 {
723 assert (!next->stack);
724 allocate_stack (next, 1);
725 coro_create (&(next->stack->cctx),
726 setup_coro, (void *)next,
727 next->stack->sptr, labs (next->stack->ssize));
728 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
729 prev->cursp = stacklevel;
730 /* don't add any code here */
731 } 999 }
732 } 1000 }
1001 }
1002 }
1003
1004 TAINT_NOT;
1005 return 0;
1006}
1007
1008/* inject a fake call to Coro::State::_cctx_init into the execution */
1009/* _cctx_init should be careful, as it could be called at almost any time */
1010/* during execution of a perl program */
1011static void NOINLINE
1012cctx_prepare (pTHX_ coro_cctx *cctx)
1013{
1014 dSP;
1015 LOGOP myop;
1016
1017 PL_top_env = &PL_start_env;
1018
1019 if (cctx->flags & CC_TRACE)
1020 PL_runops = runops_trace;
1021
1022 Zero (&myop, 1, LOGOP);
1023 myop.op_next = PL_op;
1024 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1025
1026 PUSHMARK (SP);
1027 EXTEND (SP, 2);
1028 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1029 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1030 PUTBACK;
1031 PL_op = (OP *)&myop;
1032 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1033 SPAGAIN;
1034}
1035
1036/*
1037 * this is a _very_ stripped down perl interpreter ;)
1038 */
1039static void
1040cctx_run (void *arg)
1041{
1042 dTHX;
1043
1044 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1045 UNLOCK;
1046
1047 /* we now skip the entersub that lead to transfer() */
1048 PL_op = PL_op->op_next;
1049
1050 /* inject a fake subroutine call to cctx_init */
1051 cctx_prepare (aTHX_ (coro_cctx *)arg);
1052
1053 /* somebody or something will hit me for both perl_run and PL_restartop */
1054 PL_restartop = PL_op;
1055 perl_run (PL_curinterp);
1056
1057 /*
1058 * If perl-run returns we assume exit() was being called or the coro
1059 * fell off the end, which seems to be the only valid (non-bug)
1060 * reason for perl_run to return. We try to exit by jumping to the
1061 * bootstrap-time "top" top_env, as we cannot restore the "main"
1062 * coroutine as Coro has no such concept
1063 */
1064 PL_top_env = main_top_env;
1065 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1066}
1067
1068static coro_cctx *
1069cctx_new ()
1070{
1071 coro_cctx *cctx;
1072 void *stack_start;
1073 size_t stack_size;
1074
1075 ++cctx_count;
1076
1077 Newz (0, cctx, 1, coro_cctx);
1078
1079#if HAVE_MMAP
1080 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1081 /* mmap supposedly does allocate-on-write for us */
1082 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1083
1084 if (cctx->sptr != (void *)-1)
1085 {
1086# if CORO_STACKGUARD
1087 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1088# endif
1089 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1090 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1091 cctx->flags |= CC_MAPPED;
1092 }
1093 else
1094#endif
1095 {
1096 cctx->ssize = coro_stacksize * (long)sizeof (long);
1097 New (0, cctx->sptr, coro_stacksize, long);
1098
1099 if (!cctx->sptr)
1100 {
1101 perror ("FATAL: unable to allocate stack for coroutine");
1102 _exit (EXIT_FAILURE);
1103 }
1104
1105 stack_start = cctx->sptr;
1106 stack_size = cctx->ssize;
1107 }
1108
1109 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1110 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1111
1112 return cctx;
1113}
1114
1115static void
1116cctx_destroy (coro_cctx *cctx)
1117{
1118 if (!cctx)
1119 return;
1120
1121 --cctx_count;
1122
1123#if CORO_USE_VALGRIND
1124 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1125#endif
1126
1127#if HAVE_MMAP
1128 if (cctx->flags & CC_MAPPED)
1129 munmap (cctx->sptr, cctx->ssize);
1130 else
1131#endif
1132 Safefree (cctx->sptr);
1133
1134 Safefree (cctx);
1135}
1136
1137/* wether this cctx should be destructed */
1138#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1139
1140static coro_cctx *
1141cctx_get (pTHX)
1142{
1143 while (expect_true (cctx_first))
1144 {
1145 coro_cctx *cctx = cctx_first;
1146 cctx_first = cctx->next;
1147 --cctx_idle;
1148
1149 if (expect_true (!CCTX_EXPIRED (cctx)))
1150 return cctx;
1151
1152 cctx_destroy (cctx);
1153 }
1154
1155 return cctx_new ();
1156}
1157
1158static void
1159cctx_put (coro_cctx *cctx)
1160{
1161 /* free another cctx if overlimit */
1162 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1163 {
1164 coro_cctx *first = cctx_first;
1165 cctx_first = first->next;
1166 --cctx_idle;
1167
1168 cctx_destroy (first);
1169 }
1170
1171 ++cctx_idle;
1172 cctx->next = cctx_first;
1173 cctx_first = cctx;
1174}
1175
1176/** coroutine switching *****************************************************/
1177
1178static void
1179transfer_check (pTHX_ struct coro *prev, struct coro *next)
1180{
1181 if (expect_true (prev != next))
1182 {
1183 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1184 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1185
1186 if (expect_false (next->flags & CF_RUNNING))
1187 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1188
1189 if (expect_false (next->flags & CF_DESTROYED))
1190 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1191
1192#if !PERL_VERSION_ATLEAST (5,10,0)
1193 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1194 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1195#endif
1196 }
1197}
1198
1199/* always use the TRANSFER macro */
1200static void NOINLINE
1201transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1202{
1203 dSTACKLEVEL;
1204 static volatile int has_throw;
1205
1206 /* sometimes transfer is only called to set idle_sp */
1207 if (expect_false (!next))
1208 {
1209 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1210 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1211 }
1212 else if (expect_true (prev != next))
1213 {
1214 coro_cctx *prev__cctx;
1215
1216 if (expect_false (prev->flags & CF_NEW))
1217 {
1218 /* create a new empty context */
1219 Newz (0, prev->cctx, 1, coro_cctx);
1220 prev->flags &= ~CF_NEW;
1221 prev->flags |= CF_RUNNING;
1222 }
1223
1224 prev->flags &= ~CF_RUNNING;
1225 next->flags |= CF_RUNNING;
1226
1227 LOCK;
1228
1229 /* first get rid of the old state */
1230 save_perl (aTHX_ prev);
1231
1232 if (expect_false (next->flags & CF_NEW))
1233 {
1234 /* need to start coroutine */
1235 next->flags &= ~CF_NEW;
1236 /* setup coroutine call */
1237 coro_setup (aTHX_ next);
1238 }
733 else 1239 else
1240 load_perl (aTHX_ next);
1241
1242 prev__cctx = prev->cctx;
1243
1244 /* possibly "free" the cctx */
1245 if (expect_true (
1246 prev__cctx->idle_sp == STACKLEVEL
1247 && !(prev__cctx->flags & CC_TRACE)
1248 && !force_cctx
1249 ))
1250 {
1251 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1252 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1253
1254 prev->cctx = 0;
1255
1256 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1257 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1258 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1259 if (!next->cctx)
1260 next->cctx = cctx_get (aTHX);
1261
1262 cctx_put (prev__cctx);
1263 }
1264
1265 ++next->usecount;
1266
1267 if (expect_true (!next->cctx))
1268 next->cctx = cctx_get (aTHX);
1269
1270 has_throw = !!next->throw;
1271
1272 if (expect_false (prev__cctx != next->cctx))
1273 {
1274 prev__cctx->top_env = PL_top_env;
1275 PL_top_env = next->cctx->top_env;
1276 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1277 }
1278
1279 free_coro_mortal (aTHX);
1280 UNLOCK;
1281
1282 if (expect_false (has_throw))
1283 {
1284 struct coro *coro = SvSTATE (coro_current);
1285
1286 if (coro->throw)
734 { 1287 {
1288 SV *exception = coro->throw;
1289 coro->throw = 0;
1290 sv_setsv (ERRSV, exception);
735 setup_coro (next); 1291 croak (0);
736 next->cursp = stacklevel;
737 } 1292 }
738 } 1293 }
739 } 1294 }
1295}
1296
1297struct transfer_args
1298{
1299 struct coro *prev, *next;
1300};
1301
1302#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1303#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1304
1305/** high level stuff ********************************************************/
1306
1307static int
1308coro_state_destroy (pTHX_ struct coro *coro)
1309{
1310 if (coro->flags & CF_DESTROYED)
1311 return 0;
1312
1313 coro->flags |= CF_DESTROYED;
1314
1315 if (coro->flags & CF_READY)
1316 {
1317 /* reduce nready, as destroying a ready coro effectively unreadies it */
1318 /* alternative: look through all ready queues and remove the coro */
1319 LOCK;
1320 --coro_nready;
1321 UNLOCK;
1322 }
1323 else
1324 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1325
1326 if (coro->mainstack && coro->mainstack != main_mainstack)
1327 {
1328 struct coro temp;
1329
1330 if (coro->flags & CF_RUNNING)
1331 croak ("FATAL: tried to destroy currently running coroutine");
1332
1333 save_perl (aTHX_ &temp);
1334 load_perl (aTHX_ coro);
1335
1336 coro_destroy (aTHX_ coro);
1337
1338 load_perl (aTHX_ &temp);
1339
1340 coro->slot = 0;
1341 }
1342
1343 cctx_destroy (coro->cctx);
1344 SvREFCNT_dec (coro->args);
1345
1346 if (coro->next) coro->next->prev = coro->prev;
1347 if (coro->prev) coro->prev->next = coro->next;
1348 if (coro == coro_first) coro_first = coro->next;
1349
1350 return 1;
1351}
1352
1353static int
1354coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1355{
1356 struct coro *coro = (struct coro *)mg->mg_ptr;
1357 mg->mg_ptr = 0;
1358
1359 coro->hv = 0;
1360
1361 if (--coro->refcnt < 0)
1362 {
1363 coro_state_destroy (aTHX_ coro);
1364 Safefree (coro);
1365 }
1366
1367 return 0;
1368}
1369
1370static int
1371coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1372{
1373 struct coro *coro = (struct coro *)mg->mg_ptr;
1374
1375 ++coro->refcnt;
1376
1377 return 0;
1378}
1379
1380static MGVTBL coro_state_vtbl = {
1381 0, 0, 0, 0,
1382 coro_state_free,
1383 0,
1384#ifdef MGf_DUP
1385 coro_state_dup,
1386#else
1387# define MGf_DUP 0
1388#endif
1389};
1390
1391static void
1392prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1393{
1394 ta->prev = SvSTATE (prev_sv);
1395 ta->next = SvSTATE (next_sv);
1396 TRANSFER_CHECK (*ta);
1397}
1398
1399static void
1400api_transfer (SV *prev_sv, SV *next_sv)
1401{
1402 dTHX;
1403 struct transfer_args ta;
1404
1405 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1406 TRANSFER (ta, 1);
1407}
1408
1409/** Coro ********************************************************************/
1410
1411static void
1412coro_enq (pTHX_ SV *coro_sv)
1413{
1414 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1415}
1416
1417static SV *
1418coro_deq (pTHX)
1419{
1420 int prio;
1421
1422 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1423 if (AvFILLp (coro_ready [prio]) >= 0)
1424 return av_shift (coro_ready [prio]);
1425
1426 return 0;
1427}
1428
1429static int
1430api_ready (SV *coro_sv)
1431{
1432 dTHX;
1433 struct coro *coro;
1434 SV *sv_hook;
1435 void (*xs_hook)(void);
1436
1437 if (SvROK (coro_sv))
1438 coro_sv = SvRV (coro_sv);
1439
1440 coro = SvSTATE (coro_sv);
1441
1442 if (coro->flags & CF_READY)
1443 return 0;
1444
1445 coro->flags |= CF_READY;
740 1446
741 LOCK; 1447 LOCK;
742 if (coro_mortal) 1448
743 { 1449 sv_hook = coro_nready ? 0 : coro_readyhook;
744 SvREFCNT_dec (coro_mortal); 1450 xs_hook = coro_nready ? 0 : coroapi.readyhook;
745 coro_mortal = 0; 1451
746 } 1452 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1453 ++coro_nready;
1454
747 UNLOCK; 1455 UNLOCK;
748} 1456
1457 if (sv_hook)
1458 {
1459 dSP;
749 1460
750#define SV_CORO(sv,func) \ 1461 ENTER;
751 do { \ 1462 SAVETMPS;
752 if (SvROK (sv)) \
753 sv = SvRV (sv); \
754 \
755 if (SvTYPE (sv) == SVt_PVHV) \
756 { \
757 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
758 \
759 if (!he) \
760 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
761 \
762 (sv) = SvRV (HeVAL(he)); \
763 } \
764 \
765 /* must also be changed inside Coro::Cont::yield */ \
766 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
767 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
768 \
769 } while(0)
770 1463
771#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 1464 PUSHMARK (SP);
1465 PUTBACK;
1466 call_sv (sv_hook, G_DISCARD);
1467 SPAGAIN;
1468
1469 FREETMPS;
1470 LEAVE;
1471 }
1472
1473 if (xs_hook)
1474 xs_hook ();
1475
1476 return 1;
1477}
1478
1479static int
1480api_is_ready (SV *coro_sv)
1481{
1482 dTHX;
1483 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1484}
772 1485
773static void 1486static void
774api_transfer(pTHX_ SV *prev, SV *next, int flags) 1487prepare_schedule (pTHX_ struct transfer_args *ta)
775{ 1488{
776 SV_CORO (prev, "Coro::transfer"); 1489 SV *prev_sv, *next_sv;
777 SV_CORO (next, "Coro::transfer");
778 1490
779 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1491 for (;;)
780} 1492 {
1493 LOCK;
1494 next_sv = coro_deq (aTHX);
781 1495
782/** Coro ********************************************************************/ 1496 /* nothing to schedule: call the idle handler */
1497 if (expect_false (!next_sv))
1498 {
1499 dSP;
1500 UNLOCK;
783 1501
784#define PRIO_MAX 3 1502 ENTER;
785#define PRIO_HIGH 1 1503 SAVETMPS;
786#define PRIO_NORMAL 0
787#define PRIO_LOW -1
788#define PRIO_IDLE -3
789#define PRIO_MIN -4
790 1504
791/* for Coro.pm */ 1505 PUSHMARK (SP);
792static GV *coro_current, *coro_idle; 1506 PUTBACK;
793static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 1507 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
794static int coro_nready; 1508 SPAGAIN;
1509
1510 FREETMPS;
1511 LEAVE;
1512 continue;
1513 }
1514
1515 ta->next = SvSTATE (next_sv);
1516
1517 /* cannot transfer to destroyed coros, skip and look for next */
1518 if (expect_false (ta->next->flags & CF_DESTROYED))
1519 {
1520 UNLOCK;
1521 SvREFCNT_dec (next_sv);
1522 /* coro_nready is already taken care of by destroy */
1523 continue;
1524 }
1525
1526 --coro_nready;
1527 UNLOCK;
1528 break;
1529 }
1530
1531 /* free this only after the transfer */
1532 prev_sv = SvRV (coro_current);
1533 ta->prev = SvSTATE (prev_sv);
1534 TRANSFER_CHECK (*ta);
1535 assert (ta->next->flags & CF_READY);
1536 ta->next->flags &= ~CF_READY;
1537 SvRV_set (coro_current, next_sv);
1538
1539 LOCK;
1540 free_coro_mortal (aTHX);
1541 coro_mortal = prev_sv;
1542 UNLOCK;
1543}
795 1544
796static void 1545static void
797coro_enq (pTHX_ SV *sv) 1546prepare_cede (pTHX_ struct transfer_args *ta)
798{ 1547{
799 SV **xprio; 1548 api_ready (coro_current);
800 int prio; 1549 prepare_schedule (aTHX_ ta);
1550}
801 1551
802 if (SvTYPE (sv) != SVt_PVHV) 1552static int
803 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1553prepare_cede_notself (pTHX_ struct transfer_args *ta)
804 1554{
805 xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
806 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
807
808 prio = prio > PRIO_MAX ? PRIO_MAX
809 : prio < PRIO_MIN ? PRIO_MIN
810 : prio;
811
812 av_push (coro_ready [prio - PRIO_MIN], sv);
813 coro_nready++; 1555 if (coro_nready)
814}
815
816static SV *
817coro_deq (pTHX_ int min_prio)
818{
819 int prio = PRIO_MAX - PRIO_MIN;
820
821 min_prio -= PRIO_MIN;
822 if (min_prio < 0)
823 min_prio = 0;
824
825 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826 if (av_len (coro_ready[prio]) >= 0)
827 { 1556 {
828 coro_nready--; 1557 SV *prev = SvRV (coro_current);
829 return av_shift (coro_ready[prio]); 1558 prepare_schedule (aTHX_ ta);
1559 api_ready (prev);
1560 return 1;
830 } 1561 }
831 1562 else
832 return 0; 1563 return 0;
833}
834
835static void
836api_ready (SV *coro)
837{
838 dTHX;
839
840 if (SvROK (coro))
841 coro = SvRV (coro);
842
843 LOCK;
844 coro_enq (aTHX_ SvREFCNT_inc (coro));
845 UNLOCK;
846} 1564}
847 1565
848static void 1566static void
849api_schedule (void) 1567api_schedule (void)
850{ 1568{
851 dTHX; 1569 dTHX;
1570 struct transfer_args ta;
852 1571
853 SV *prev, *next; 1572 prepare_schedule (aTHX_ &ta);
1573 TRANSFER (ta, 1);
1574}
854 1575
855 LOCK; 1576static int
1577api_cede (void)
1578{
1579 dTHX;
1580 struct transfer_args ta;
856 1581
857 prev = SvRV (GvSV (coro_current)); 1582 prepare_cede (aTHX_ &ta);
858 next = coro_deq (aTHX_ PRIO_MIN);
859 1583
860 if (!next) 1584 if (expect_true (ta.prev != ta.next))
861 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1585 {
1586 TRANSFER (ta, 1);
1587 return 1;
1588 }
1589 else
1590 return 0;
1591}
862 1592
863 /* free this only after the transfer */ 1593static int
864 coro_mortal = prev; 1594api_cede_notself (void)
865 SV_CORO (prev, "Coro::schedule"); 1595{
1596 dTHX;
1597 struct transfer_args ta;
866 1598
867 SvRV (GvSV (coro_current)) = next; 1599 if (prepare_cede_notself (aTHX_ &ta))
868 1600 {
869 SV_CORO (next, "Coro::schedule"); 1601 TRANSFER (ta, 1);
870 1602 return 1;
871 UNLOCK; 1603 }
872 1604 else
873 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1605 return 0;
874 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
875} 1606}
876 1607
877static void 1608static void
878api_cede (void) 1609api_trace (SV *coro_sv, int flags)
879{ 1610{
880 dTHX; 1611 dTHX;
1612 struct coro *coro = SvSTATE (coro_sv);
881 1613
882 LOCK; 1614 if (flags & CC_TRACE)
883 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1615 {
884 UNLOCK; 1616 if (!coro->cctx)
1617 coro->cctx = cctx_new ();
1618 else if (!(coro->cctx->flags & CC_TRACE))
1619 croak ("cannot enable tracing on coroutine with custom stack");
885 1620
886 api_schedule (); 1621 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
887} 1622 }
1623 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1624 {
1625 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
888 1626
1627 if (coro->flags & CF_RUNNING)
1628 PL_runops = RUNOPS_DEFAULT;
1629 else
1630 coro->slot->runops = RUNOPS_DEFAULT;
1631 }
1632}
1633
1634static int
1635coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1636{
1637 AV *padlist;
1638 AV *av = (AV *)mg->mg_obj;
1639
1640 abort ();
1641
1642 return 0;
1643}
1644
1645static MGVTBL coro_gensub_vtbl = {
1646 0, 0, 0, 0,
1647 coro_gensub_free
1648};
1649
889MODULE = Coro::State PACKAGE = Coro::State 1650MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
890 1651
891PROTOTYPES: ENABLE 1652PROTOTYPES: DISABLE
892 1653
893BOOT: 1654BOOT:
894{ /* {} necessary for stoopid perl-5.6.x */ 1655{
895#ifdef USE_ITHREADS 1656#ifdef USE_ITHREADS
896 MUTEX_INIT (&coro_mutex); 1657 MUTEX_INIT (&coro_mutex);
897#endif 1658#endif
1659 BOOT_PAGESIZE;
898 1660
899 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1661 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
900 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1662 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1663
1664 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1665 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1666 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1667
1668 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1669 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1670 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1671
901 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1672 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
902 1673
903 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1674 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
904 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1675 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
905 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1676 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
906 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1677 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
907 1678
908 main_mainstack = PL_mainstack; 1679 main_mainstack = PL_mainstack;
1680 main_top_env = PL_top_env;
909 1681
1682 while (main_top_env->je_prev)
1683 main_top_env = main_top_env->je_prev;
1684
910 coroapi.ver = CORO_API_VERSION; 1685 coroapi.ver = CORO_API_VERSION;
1686 coroapi.rev = CORO_API_REVISION;
911 coroapi.transfer = api_transfer; 1687 coroapi.transfer = api_transfer;
912}
913 1688
914Coro::State 1689 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
915_newprocess(args) 1690}
916 SV * args 1691
917 PROTOTYPE: $ 1692SV *
1693new (char *klass, ...)
918 CODE: 1694 CODE:
919 Coro__State coro; 1695{
1696 struct coro *coro;
1697 MAGIC *mg;
1698 HV *hv;
1699 int i;
920 1700
921 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
922 croak ("Coro::State::_newprocess expects an arrayref");
923
924 Newz (0, coro, 1, struct coro); 1701 Newz (0, coro, 1, struct coro);
1702 coro->args = newAV ();
1703 coro->flags = CF_NEW;
925 1704
926 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1705 if (coro_first) coro_first->prev = coro;
927 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1706 coro->next = coro_first;
928 /*coro->stack = 0;*/ 1707 coro_first = coro;
929 1708
930 /* same as JMPENV_BOOTSTRAP */ 1709 coro->hv = hv = newHV ();
931 /* we might be able to recycle start_env, but safe is safe */ 1710 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
932 /*Zero(&coro->start_env, 1, JMPENV);*/ 1711 mg->mg_flags |= MGf_DUP;
933 coro->start_env.je_ret = -1; 1712 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
934 coro->start_env.je_mustcatch = TRUE;
935 1713
936 RETVAL = coro; 1714 av_extend (coro->args, items - 1);
1715 for (i = 1; i < items; i++)
1716 av_push (coro->args, newSVsv (ST (i)));
1717}
937 OUTPUT: 1718 OUTPUT:
938 RETVAL 1719 RETVAL
939 1720
1721# these not obviously related functions are all rolled into the same xs
1722# function to increase chances that they all will call transfer with the same
1723# stack offset
940void 1724void
941transfer(prev, next, flags) 1725_set_stacklevel (...)
942 SV *prev 1726 ALIAS:
943 SV *next 1727 Coro::State::transfer = 1
944 int flags 1728 Coro::schedule = 2
945 PROTOTYPE: @ 1729 Coro::cede = 3
1730 Coro::cede_notself = 4
946 CODE: 1731 CODE:
1732{
1733 struct transfer_args ta;
1734
947 PUTBACK; 1735 PUTBACK;
948 SV_CORO (next, "Coro::transfer"); 1736 switch (ix)
949 SV_CORO (prev, "Coro::transfer"); 1737 {
950 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1738 case 0:
1739 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1740 ta.next = 0;
1741 break;
1742
1743 case 1:
1744 if (items != 2)
1745 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1746
1747 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1748 break;
1749
1750 case 2:
1751 prepare_schedule (aTHX_ &ta);
1752 break;
1753
1754 case 3:
1755 prepare_cede (aTHX_ &ta);
1756 break;
1757
1758 case 4:
1759 if (!prepare_cede_notself (aTHX_ &ta))
1760 XSRETURN_EMPTY;
1761
1762 break;
1763 }
951 SPAGAIN; 1764 SPAGAIN;
952 1765
1766 BARRIER;
1767 PUTBACK;
1768 TRANSFER (ta, 0);
1769 SPAGAIN; /* might be the sp of a different coroutine now */
1770 /* be extra careful not to ever do anything after TRANSFER */
1771}
1772
1773bool
1774_destroy (SV *coro_sv)
1775 CODE:
1776 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1777 OUTPUT:
1778 RETVAL
1779
953void 1780void
954DESTROY(coro)
955 Coro::State coro
956 CODE:
957
958 if (coro->mainstack && coro->mainstack != main_mainstack)
959 {
960 struct coro temp;
961
962 PUTBACK;
963 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
964 LOAD (aTHX_ coro);
965 SPAGAIN;
966
967 destroy_stacks (aTHX);
968
969 LOAD ((&temp)); /* this will get rid of defsv etc.. */
970 SPAGAIN;
971
972 coro->mainstack = 0;
973 }
974
975 deallocate_stack (coro);
976 SvREFCNT_dec (coro->args);
977 Safefree (coro);
978
979void
980_exit(code) 1781_exit (int code)
981 int code
982 PROTOTYPE: $ 1782 PROTOTYPE: $
983 CODE: 1783 CODE:
984 _exit (code); 1784 _exit (code);
985 1785
986MODULE = Coro::State PACKAGE = Coro::Cont 1786int
1787cctx_stacksize (int new_stacksize = 0)
1788 CODE:
1789 RETVAL = coro_stacksize;
1790 if (new_stacksize)
1791 coro_stacksize = new_stacksize;
1792 OUTPUT:
1793 RETVAL
987 1794
988# this is slightly dirty (should expose a c-level api) 1795int
1796cctx_count ()
1797 CODE:
1798 RETVAL = cctx_count;
1799 OUTPUT:
1800 RETVAL
1801
1802int
1803cctx_idle ()
1804 CODE:
1805 RETVAL = cctx_idle;
1806 OUTPUT:
1807 RETVAL
989 1808
990void 1809void
991yield(...) 1810list ()
992 PROTOTYPE: @ 1811 PPCODE:
1812{
1813 struct coro *coro;
1814 for (coro = coro_first; coro; coro = coro->next)
1815 if (coro->hv)
1816 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1817}
1818
1819void
1820call (Coro::State coro, SV *coderef)
1821 ALIAS:
1822 eval = 1
1823 CODE:
1824{
1825 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1826 {
1827 struct coro temp;
1828
1829 if (!(coro->flags & CF_RUNNING))
1830 {
1831 PUTBACK;
1832 save_perl (aTHX_ &temp);
1833 load_perl (aTHX_ coro);
1834 }
1835
1836 {
1837 dSP;
1838 ENTER;
1839 SAVETMPS;
1840 PUTBACK;
1841 PUSHSTACK;
1842 PUSHMARK (SP);
1843
1844 if (ix)
1845 eval_sv (coderef, 0);
1846 else
1847 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1848
1849 POPSTACK;
1850 SPAGAIN;
1851 FREETMPS;
1852 LEAVE;
1853 PUTBACK;
1854 }
1855
1856 if (!(coro->flags & CF_RUNNING))
1857 {
1858 save_perl (aTHX_ coro);
1859 load_perl (aTHX_ &temp);
1860 SPAGAIN;
1861 }
1862 }
1863}
1864
1865SV *
1866is_ready (Coro::State coro)
1867 PROTOTYPE: $
1868 ALIAS:
1869 is_ready = CF_READY
1870 is_running = CF_RUNNING
1871 is_new = CF_NEW
1872 is_destroyed = CF_DESTROYED
1873 CODE:
1874 RETVAL = boolSV (coro->flags & ix);
1875 OUTPUT:
1876 RETVAL
1877
1878void
1879api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1880
1881SV *
1882has_cctx (Coro::State coro)
1883 PROTOTYPE: $
1884 CODE:
1885 RETVAL = boolSV (!!coro->cctx);
1886 OUTPUT:
1887 RETVAL
1888
1889int
1890is_traced (Coro::State coro)
1891 PROTOTYPE: $
1892 CODE:
1893 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1894 OUTPUT:
1895 RETVAL
1896
1897IV
1898rss (Coro::State coro)
1899 PROTOTYPE: $
1900 ALIAS:
1901 usecount = 1
993 CODE: 1902 CODE:
994 SV *yieldstack; 1903 switch (ix)
995 SV *sv; 1904 {
996 AV *defav = GvAV (PL_defgv); 1905 case 0: RETVAL = coro_rss (aTHX_ coro); break;
997 struct coro *prev, *next; 1906 case 1: RETVAL = coro->usecount; break;
998
999 yieldstack = *hv_fetch (
1000 (HV *)SvRV (GvSV (coro_current)),
1001 "yieldstack", sizeof ("yieldstack") - 1,
1002 0 1907 }
1003 ); 1908 OUTPUT:
1909 RETVAL
1004 1910
1005 /* set up @_ -- ugly */ 1911void
1006 av_clear (defav); 1912force_cctx ()
1007 av_fill (defav, items - 1); 1913 CODE:
1008 while (items--) 1914 struct coro *coro = SvSTATE (coro_current);
1009 av_store (defav, items, SvREFCNT_inc (ST(items))); 1915 coro->cctx->idle_sp = 0;
1010 1916
1011 sv = av_pop ((AV *)SvRV (yieldstack)); 1917void
1012 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)))); 1918throw (Coro::State self, SV *throw = &PL_sv_undef)
1013 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)))); 1919 PROTOTYPE: $;$
1920 CODE:
1014 SvREFCNT_dec (sv); 1921 SvREFCNT_dec (self->throw);
1922 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1015 1923
1016 transfer (aTHX_ prev, next, 0); 1924void
1925swap_defsv (Coro::State self)
1926 PROTOTYPE: $
1927 ALIAS:
1928 swap_defav = 1
1929 CODE:
1930 if (!self->slot)
1931 croak ("cannot swap state with coroutine that has no saved state");
1932 else
1933 {
1934 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1935 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1936
1937 SV *tmp = *src; *src = *dst; *dst = tmp;
1938 }
1017 1939
1018MODULE = Coro::State PACKAGE = Coro 1940MODULE = Coro::State PACKAGE = Coro
1019 1941
1020# this is slightly dirty (should expose a c-level api)
1021
1022BOOT: 1942BOOT:
1023{ 1943{
1024 int i; 1944 int i;
1945
1946 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1947 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1948 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1949
1950 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1951 SvREADONLY_on (coro_current);
1952
1025 HV *stash = gv_stashpv ("Coro", TRUE); 1953 coro_stash = gv_stashpv ("Coro", TRUE);
1026 1954
1027 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1955 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1028 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1956 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1029 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1957 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1030 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1958 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1031 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1959 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1032 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1960 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1033
1034 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1035 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1036 1961
1037 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1962 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1038 coro_ready[i] = newAV (); 1963 coro_ready[i] = newAV ();
1039 1964
1040 { 1965 {
1041 SV *sv = perl_get_sv("Coro::API", 1); 1966 SV *sv = perl_get_sv ("Coro::API", TRUE);
1967 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1042 1968
1043 coroapi.schedule = api_schedule; 1969 coroapi.schedule = api_schedule;
1044 coroapi.cede = api_cede; 1970 coroapi.cede = api_cede;
1971 coroapi.cede_notself = api_cede_notself;
1045 coroapi.ready = api_ready; 1972 coroapi.ready = api_ready;
1973 coroapi.is_ready = api_is_ready;
1046 coroapi.nready = &coro_nready; 1974 coroapi.nready = &coro_nready;
1047 coroapi.current = coro_current; 1975 coroapi.current = coro_current;
1048 1976
1049 GCoroAPI = &coroapi; 1977 GCoroAPI = &coroapi;
1050 sv_setiv(sv, (IV)&coroapi); 1978 sv_setiv (sv, (IV)&coroapi);
1051 SvREADONLY_on(sv); 1979 SvREADONLY_on (sv);
1052 } 1980 }
1053} 1981}
1054 1982
1055#if !PERL_MICRO
1056
1057void 1983void
1058ready(self) 1984_set_current (SV *current)
1059 SV * self
1060 PROTOTYPE: $ 1985 PROTOTYPE: $
1061 CODE: 1986 CODE:
1062 api_ready (self); 1987 SvREFCNT_dec (SvRV (coro_current));
1988 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1063 1989
1064#endif 1990void
1991_set_readyhook (SV *hook)
1992 PROTOTYPE: $
1993 CODE:
1994 LOCK;
1995 SvREFCNT_dec (coro_readyhook);
1996 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1997 UNLOCK;
1065 1998
1066int 1999int
2000prio (Coro::State coro, int newprio = 0)
2001 ALIAS:
2002 nice = 1
2003 CODE:
2004{
2005 RETVAL = coro->prio;
2006
2007 if (items > 1)
2008 {
2009 if (ix)
2010 newprio = coro->prio - newprio;
2011
2012 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2013 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2014
2015 coro->prio = newprio;
2016 }
2017}
2018 OUTPUT:
2019 RETVAL
2020
2021SV *
2022ready (SV *self)
2023 PROTOTYPE: $
2024 CODE:
2025 RETVAL = boolSV (api_ready (self));
2026 OUTPUT:
2027 RETVAL
2028
2029int
1067nready(...) 2030nready (...)
1068 PROTOTYPE: 2031 PROTOTYPE:
1069 CODE: 2032 CODE:
1070 RETVAL = coro_nready; 2033 RETVAL = coro_nready;
1071 OUTPUT: 2034 OUTPUT:
1072 RETVAL 2035 RETVAL
1073 2036
2037# for async_pool speedup
1074void 2038void
1075schedule(...) 2039_pool_1 (SV *cb)
1076 PROTOTYPE:
1077 CODE: 2040 CODE:
1078 api_schedule (); 2041{
2042 struct coro *coro = SvSTATE (coro_current);
2043 HV *hv = (HV *)SvRV (coro_current);
2044 AV *defav = GvAV (PL_defgv);
2045 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2046 AV *invoke_av;
2047 int i, len;
2048
2049 if (!invoke)
2050 {
2051 SV *old = PL_diehook;
2052 PL_diehook = 0;
2053 SvREFCNT_dec (old);
2054 croak ("\3async_pool terminate\2\n");
2055 }
2056
2057 SvREFCNT_dec (coro->saved_deffh);
2058 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2059
2060 hv_store (hv, "desc", sizeof ("desc") - 1,
2061 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2062
2063 invoke_av = (AV *)SvRV (invoke);
2064 len = av_len (invoke_av);
2065
2066 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2067
2068 if (len > 0)
2069 {
2070 av_fill (defav, len - 1);
2071 for (i = 0; i < len; ++i)
2072 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2073 }
2074
2075 SvREFCNT_dec (invoke);
2076}
1079 2077
1080void 2078void
1081cede(...) 2079_pool_2 (SV *cb)
1082 PROTOTYPE:
1083 CODE: 2080 CODE:
1084 api_cede (); 2081{
2082 struct coro *coro = SvSTATE (coro_current);
1085 2083
1086# and these are hacks 2084 sv_setsv (cb, &PL_sv_undef);
2085
2086 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2087 coro->saved_deffh = 0;
2088
2089 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2090 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2091 {
2092 SV *old = PL_diehook;
2093 PL_diehook = 0;
2094 SvREFCNT_dec (old);
2095 croak ("\3async_pool terminate\2\n");
2096 }
2097
2098 av_clear (GvAV (PL_defgv));
2099 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2100 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2101
2102 coro->prio = 0;
2103
2104 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2105 api_trace (coro_current, 0);
2106
2107 av_push (av_async_pool, newSVsv (coro_current));
2108}
2109
2110#if 0
2111
2112void
2113_generator_call (...)
2114 PROTOTYPE: @
2115 PPCODE:
2116 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2117 xxxx
2118 abort ();
2119
1087SV * 2120SV *
1088_aio_get_state () 2121gensub (SV *sub, ...)
1089 CODE: 2122 PROTOTYPE: &;@
2123 CODE:
1090{ 2124{
1091 struct { 2125 struct coro *coro;
1092 int errorno; 2126 MAGIC *mg;
1093 int laststype; 2127 CV *xcv;
1094 int laststatval; 2128 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1095 Stat_t statcache; 2129 int i;
1096 } data;
1097 2130
1098 data.errorno = errno; 2131 CvGV (ncv) = CvGV (cv);
1099 data.laststype = PL_laststype; 2132 CvFILE (ncv) = CvFILE (cv);
1100 data.laststatval = PL_laststatval;
1101 data.statcache = PL_statcache;
1102 2133
1103 RETVAL = newSVpvn ((char *)&data, sizeof data); 2134 Newz (0, coro, 1, struct coro);
2135 coro->args = newAV ();
2136 coro->flags = CF_NEW;
2137
2138 av_extend (coro->args, items - 1);
2139 for (i = 1; i < items; i++)
2140 av_push (coro->args, newSVsv (ST (i)));
2141
2142 CvISXSUB_on (ncv);
2143 CvXSUBANY (ncv).any_ptr = (void *)coro;
2144
2145 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2146
2147 CvXSUB (ncv) = CvXSUB (xcv);
2148 CvANON_on (ncv);
2149
2150 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2151 RETVAL = newRV_noinc ((SV *)ncv);
1104} 2152}
1105 OUTPUT: 2153 OUTPUT:
1106 RETVAL 2154 RETVAL
1107 2155
2156#endif
2157
2158
2159MODULE = Coro::State PACKAGE = Coro::AIO
2160
2161SV *
2162_get_state ()
2163 CODE:
2164{
2165 struct io_state *data;
2166
2167 RETVAL = newSV (sizeof (struct io_state));
2168 data = (struct io_state *)SvPVX (RETVAL);
2169 SvCUR_set (RETVAL, sizeof (struct io_state));
2170 SvPOK_only (RETVAL);
2171
2172 data->errorno = errno;
2173 data->laststype = PL_laststype;
2174 data->laststatval = PL_laststatval;
2175 data->statcache = PL_statcache;
2176}
2177 OUTPUT:
2178 RETVAL
2179
1108void 2180void
1109_aio_set_state (char *data_) 2181_set_state (char *data_)
1110 PROTOTYPE: $ 2182 PROTOTYPE: $
1111 CODE: 2183 CODE:
1112{ 2184{
1113 struct { 2185 struct io_state *data = (void *)data_;
1114 int errorno;
1115 int laststype;
1116 int laststatval;
1117 Stat_t statcache;
1118 } *data = (void *)data_;
1119 2186
1120 errno = data->errorno; 2187 errno = data->errorno;
1121 PL_laststype = data->laststype; 2188 PL_laststype = data->laststype;
1122 PL_laststatval = data->laststatval; 2189 PL_laststatval = data->laststatval;
1123 PL_statcache = data->statcache; 2190 PL_statcache = data->statcache;
1124} 2191}
2192
2193
2194MODULE = Coro::State PACKAGE = Coro::AnyEvent
2195
2196BOOT:
2197 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2198
2199SV *
2200_schedule (...)
2201 PROTOTYPE: @
2202 CODE:
2203{
2204 static int incede;
2205
2206 api_cede_notself ();
2207
2208 ++incede;
2209 while (coro_nready >= incede && api_cede ())
2210 ;
2211
2212 sv_setsv (sv_activity, &PL_sv_undef);
2213 if (coro_nready >= incede)
2214 {
2215 PUSHMARK (SP);
2216 PUTBACK;
2217 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2218 SPAGAIN;
2219 }
2220
2221 --incede;
2222}
2223

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