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Comparing Coro/Coro/State.xs (file contents):
Revision 1.95 by root, Sun Nov 26 17:35:42 2006 UTC vs.
Revision 1.244 by root, Sun Sep 21 18:29:39 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
8 9
9#include "patchlevel.h" 10#include "patchlevel.h"
10 11
11#if PERL_VERSION < 6 12#include <stdio.h>
13#include <errno.h>
14#include <assert.h>
15
16#ifdef WIN32
17# undef setjmp
18# undef longjmp
19# undef _exit
20# define setjmp _setjmp // deep magic, don't ask
21#else
22# include <inttypes.h> /* most portable stdint.h */
23#endif
24
25#ifdef HAVE_MMAP
26# include <unistd.h>
27# include <sys/mman.h>
28# ifndef MAP_ANONYMOUS
29# ifdef MAP_ANON
30# define MAP_ANONYMOUS MAP_ANON
31# else
32# undef HAVE_MMAP
33# endif
34# endif
35# include <limits.h>
36# ifndef PAGESIZE
37# define PAGESIZE pagesize
38# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
39static long pagesize;
40# else
41# define BOOT_PAGESIZE (void)0
42# endif
43#else
44# define PAGESIZE 0
45# define BOOT_PAGESIZE (void)0
46#endif
47
48#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif
54
55/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8
57
58#define PERL_VERSION_ATLEAST(a,b,c) \
59 (PERL_REVISION > (a) \
60 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
63
64#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 65# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 66# define PL_ppaddr ppaddr
14# endif 67# endif
15# ifndef call_sv 68# ifndef call_sv
16# define call_sv perl_call_sv 69# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 80# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 81# define IS_PADCONST(v) 0
29# endif 82# endif
30#endif 83#endif
31 84
32#include <stdio.h> 85/* 5.8.8 */
33#include <errno.h> 86#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0
88#endif
89#ifndef newSV
90# define newSV(l) NEWSV(0,l)
91#endif
92
93/* 5.11 */
94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
97
98/* 5.8.7 */
99#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v)
101#endif
34 102
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 103#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD 104# undef CORO_STACKGUARD
37#endif
38
39#ifndef STACKGUARD
40# define STACKGUARD 0
41#endif
42
43#ifdef HAVE_MMAP
44# include <unistd.h>
45# include <sys/mman.h>
46# ifndef MAP_ANONYMOUS
47# ifdef MAP_ANON
48# define MAP_ANONYMOUS MAP_ANON
49# else
50# undef HAVE_MMAP
51# endif
52# endif 105#endif
53# include <limits.h> 106
54# ifndef PAGESIZE 107#ifndef CORO_STACKGUARD
55# define PAGESIZE pagesize 108# define CORO_STACKGUARD 0
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize;
58# else
59# define BOOT_PAGESIZE
60# endif 109#endif
61#endif
62 110
63/* The next macro should declare a variable stacklevel that contains and approximation 111/* prefer perl internal functions over our own? */
64 * to the current C stack pointer. Its property is that it changes with each call 112#ifndef CORO_PREFER_PERL_FUNCTIONS
65 * and should be unique. */ 113# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif
115
116/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */
66#define dSTACKLEVEL int stacklevel 118#define dSTACKLEVEL volatile char stacklevel
67#define STACKLEVEL ((void *)&stacklevel) 119#define STACKLEVEL ((void *)&stacklevel)
68 120
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
70 122
123#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value))
127#else
128# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr)
131#endif
132
133#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1)
135
136#define NOINLINE attribute ((noinline))
137
71#include "CoroAPI.h" 138#include "CoroAPI.h"
72
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74 139
75#ifdef USE_ITHREADS 140#ifdef USE_ITHREADS
76static perl_mutex coro_mutex; 141static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else 144#else
80# define LOCK (void)0 145# define LOCK (void)0
81# define UNLOCK (void)0 146# define UNLOCK (void)0
82#endif 147#endif
83 148
149/* helper storage struct for Coro::AIO */
150struct io_state
151{
152 int errorno;
153 I32 laststype;
154 int laststatval;
155 Stat_t statcache;
156};
157
158static size_t coro_stacksize = CORO_STACKSIZE;
84static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 160static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 162static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 163static volatile SV *coro_mortal; /* will be freed after next transfer */
164
165static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook;
168static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */
170
171/* async_pool helper stuff */
172static SV *sv_pool_rss;
173static SV *sv_pool_size;
174static AV *av_async_pool;
175
176/* Coro::AnyEvent */
177static SV *sv_activity;
178
179static struct coro_cctx *cctx_first;
180static int cctx_count, cctx_idle;
181
182enum {
183 CC_MAPPED = 0x01,
184 CC_NOREUSE = 0x02, /* throw this away after tracing */
185 CC_TRACE = 0x04,
186 CC_TRACE_SUB = 0x08, /* trace sub calls */
187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189};
88 190
89/* this is a structure representing a c-level coroutine */ 191/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 192typedef struct coro_cctx {
91 struct coro_stack *next; 193 struct coro_cctx *next;
92 194
93 /* the stack */ 195 /* the stack */
94 void *sptr; 196 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 197 size_t ssize;
96 198
97 /* cpu state */ 199 /* cpu state */
98 void *idle_sp; /* original stacklevel when coroutine was created */ 200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99 JMPENV *top_env; 202 JMPENV *top_env;
100 coro_context cctx; 203 coro_context cctx;
101} coro_stack; 204
205#if CORO_USE_VALGRIND
206 int valgrind_id;
207#endif
208 unsigned char flags;
209} coro_cctx;
210
211enum {
212 CF_RUNNING = 0x0001, /* coroutine is running */
213 CF_READY = 0x0002, /* coroutine is ready */
214 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216};
217
218/* the structure where most of the perl state is stored, overlaid on the cxstack */
219typedef struct {
220 SV *defsv;
221 AV *defav;
222 SV *errsv;
223 SV *irsgv;
224#define VAR(name,type) type name;
225# include "state.h"
226#undef VAR
227} perl_slots;
228
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
102 230
103/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
104struct coro { 232struct coro {
105 /* the c coroutine allocated to this perl coroutine, if any */ 233 /* the c coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 234 coro_cctx *cctx;
107 235
108 /* data associated with this coroutine (initial args) */ 236 /* process data */
109 AV *args;
110 int refcnt;
111
112 /* optionally saved, might be zero */
113 AV *defav;
114 SV *defsv;
115 SV *errsv;
116
117 /* saved global state not related to stacks */
118 U8 dowarn;
119 I32 in_eval;
120
121 /* the stacks and related info (callchain etc..) */
122 PERL_SI *curstackinfo;
123 AV *curstack;
124 AV *mainstack; 237 AV *mainstack;
125 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
126 OP *op; 239
127 SV **curpad; 240 AV *args; /* data associated with this coroutine (initial args) */
128 AV *comppad; 241 int refcnt; /* coroutines are refcounted, yes */
129 CV *compcv; 242 int flags; /* CF_ flags */
130 SV **stack_base; 243 HV *hv; /* the perl hash associated with this coro, if any */
131 SV **stack_max; 244
132 SV **tmps_stack; 245 /* statistics */
133 I32 tmps_floor; 246 int usecount; /* number of transfers to this coro */
134 I32 tmps_ix;
135 I32 tmps_max;
136 I32 *markstack;
137 I32 *markstack_ptr;
138 I32 *markstack_max;
139 I32 *scopestack;
140 I32 scopestack_ix;
141 I32 scopestack_max;
142 ANY *savestack;
143 I32 savestack_ix;
144 I32 savestack_max;
145 OP **retstack;
146 I32 retstack_ix;
147 I32 retstack_max;
148 PMOP *curpm;
149 COP *curcop;
150 247
151 /* coro process data */ 248 /* coro process data */
152 int prio; 249 int prio;
250 SV *throw; /* exception to be thrown */
251
252 /* async_pool */
253 SV *saved_deffh;
254
255 /* linked list */
256 struct coro *next, *prev;
153}; 257};
154 258
155typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
157 261
262/** Coro ********************************************************************/
263
264#define PRIO_MAX 3
265#define PRIO_HIGH 1
266#define PRIO_NORMAL 0
267#define PRIO_LOW -1
268#define PRIO_IDLE -3
269#define PRIO_MIN -4
270
271/* for Coro.pm */
272static SV *coro_current;
273static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
275static int coro_nready;
276static struct coro *coro_first;
277
278/** lowlevel stuff **********************************************************/
279
280static SV *
281coro_get_sv (pTHX_ const char *name, int create)
282{
283#if PERL_VERSION_ATLEAST (5,10,0)
284 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
285 get_sv (name, create);
286#endif
287 return get_sv (name, create);
288}
289
290static AV *
291coro_get_av (pTHX_ const char *name, int create)
292{
293#if PERL_VERSION_ATLEAST (5,10,0)
294 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
295 get_av (name, create);
296#endif
297 return get_av (name, create);
298}
299
300static HV *
301coro_get_hv (pTHX_ const char *name, int create)
302{
303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_hv (name, create);
306#endif
307 return get_hv (name, create);
308}
309
158static AV * 310static AV *
159coro_clone_padlist (pTHX_ CV *cv) 311coro_clone_padlist (pTHX_ CV *cv)
160{ 312{
161 AV *padlist = CvPADLIST (cv); 313 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 314 AV *newpadlist, *newpad;
163 315
164 newpadlist = newAV (); 316 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 318#if PERL_VERSION_ATLEAST (5,10,0)
319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
320#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 322#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 324 --AvFILLp (padlist);
173 325
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
… …
214 SvREFCNT_dec (av); 366 SvREFCNT_dec (av);
215 367
216 return 0; 368 return 0;
217} 369}
218 370
219#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
220 373
221static 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))
222 414
223/* the next two functions merely cache the padlists */ 415/* the next two functions merely cache the padlists */
224static void 416static void
225get_padlist (pTHX_ CV *cv) 417get_padlist (pTHX_ CV *cv)
226{ 418{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 419 MAGIC *mg = CORO_MAGIC_cv (cv);
420 AV *av;
228 421
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 422 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 423 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 424 else
232 { 425 {
233#if 0 426#if CORO_PREFER_PERL_FUNCTIONS
234 /* this should work - but it doesn't :( */ 427 /* this is probably cleaner? but also slower! */
428 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 429 CV *cp = Perl_cv_clone (cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 430 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 431 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 432 SvREFCNT_dec (cp);
239#else 433#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 434 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
243} 437}
244 438
245static void 439static void
246put_padlist (pTHX_ CV *cv) 440put_padlist (pTHX_ CV *cv)
247{ 441{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 442 MAGIC *mg = CORO_MAGIC_cv (cv);
443 AV *av;
249 444
250 if (!mg) 445 if (expect_false (!mg))
251 { 446 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254 mg->mg_virtual = &vtbl_coro;
255 mg->mg_obj = (SV *)newAV ();
256 }
257 447
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 448 av = (AV *)mg->mg_obj;
259}
260 449
261#define SB do { 450 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 451 av_extend (av, AvMAX (av) + 1);
263 452
264#define LOAD(state) load_state(aTHX_ (state)); 453 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 454}
266 455
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 456/** load & save, init *******************************************************/
268 457
269static void 458static void
270load_state(pTHX_ Coro__State c) 459load_perl (pTHX_ Coro__State c)
271{ 460{
272 PL_dowarn = c->dowarn; 461 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 462 c->slot = 0;
274 463
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 464 PL_mainstack = c->mainstack;
278 PL_stack_sp = c->stack_sp;
279 PL_op = c->op;
280 PL_curpad = c->curpad;
281 PL_comppad = c->comppad;
282 PL_compcv = c->compcv;
283 PL_stack_base = c->stack_base;
284 PL_stack_max = c->stack_max;
285 PL_tmps_stack = c->tmps_stack;
286 PL_tmps_floor = c->tmps_floor;
287 PL_tmps_ix = c->tmps_ix;
288 PL_tmps_max = c->tmps_max;
289 PL_markstack = c->markstack;
290 PL_markstack_ptr = c->markstack_ptr;
291 PL_markstack_max = c->markstack_max;
292 PL_scopestack = c->scopestack;
293 PL_scopestack_ix = c->scopestack_ix;
294 PL_scopestack_max = c->scopestack_max;
295 PL_savestack = c->savestack;
296 PL_savestack_ix = c->savestack_ix;
297 PL_savestack_max = c->savestack_max;
298#if PERL_VERSION < 9
299 PL_retstack = c->retstack;
300 PL_retstack_ix = c->retstack_ix;
301 PL_retstack_max = c->retstack_max;
302#endif
303 PL_curpm = c->curpm;
304 PL_curcop = c->curcop;
305 465
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 466 GvSV (PL_defgv) = slot->defsv;
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 467 GvAV (PL_defgv) = slot->defav;
308 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
309 474
310 { 475 {
311 dSP; 476 dSP;
477
312 CV *cv; 478 CV *cv;
313 479
314 /* now do the ugly restore mess */ 480 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs)) 481 while (expect_true (cv = (CV *)POPs))
316 { 482 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */ 483 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist; 484 CvDEPTH (cv) = PTR2IV (POPs);
323 } 485 CvPADLIST (cv) = (AV *)POPs;
324
325 ++CvDEPTH(cv);
326 } 486 }
327 487
328 PUTBACK; 488 PUTBACK;
329 } 489 }
330} 490}
331 491
332static void 492static void
333save_state(pTHX_ Coro__State c, int flags) 493save_perl (pTHX_ Coro__State c)
334{ 494{
335 { 495 {
336 dSP; 496 dSP;
337 I32 cxix = cxstack_ix; 497 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack; 498 PERL_CONTEXT *ccstk = cxstack;
… …
341 /* 501 /*
342 * 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
343 * (and reinitialize) all cv's in the whole callchain :( 503 * (and reinitialize) all cv's in the whole callchain :(
344 */ 504 */
345 505
346 PUSHs (Nullsv); 506 XPUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */ 507 /* this loop was inspired by pp_caller */
348 for (;;) 508 for (;;)
349 { 509 {
350 while (cxix >= 0) 510 while (expect_true (cxix >= 0))
351 { 511 {
352 PERL_CONTEXT *cx = &ccstk[cxix--]; 512 PERL_CONTEXT *cx = &ccstk[cxix--];
353 513
354 if (CxTYPE(cx) == CXt_SUB) 514 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355 { 515 {
356 CV *cv = cx->blk_sub.cv; 516 CV *cv = cx->blk_sub.cv;
517
357 if (CvDEPTH(cv)) 518 if (expect_true (CvDEPTH (cv)))
358 { 519 {
359 EXTEND (SP, CvDEPTH(cv)*2); 520 EXTEND (SP, 3);
360
361 while (--CvDEPTH(cv))
362 {
363 /* this tells the restore code to increment CvDEPTH */
364 PUSHs (Nullsv);
365 PUSHs ((SV *)cv);
366 }
367
368 PUSHs ((SV *)CvPADLIST(cv)); 521 PUSHs ((SV *)CvPADLIST (cv));
522 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
369 PUSHs ((SV *)cv); 523 PUSHs ((SV *)cv);
370 524
525 CvDEPTH (cv) = 0;
371 get_padlist (aTHX_ cv); 526 get_padlist (aTHX_ cv);
372 } 527 }
373 } 528 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE(cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 529 }
383 530
384 if (top_si->si_type == PERLSI_MAIN) 531 if (expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 532 break;
386 533
387 top_si = top_si->si_prev; 534 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 535 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 536 cxix = top_si->si_cxix;
390 } 537 }
391 538
392 PUTBACK; 539 PUTBACK;
393 } 540 }
394 541
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 542 /* allocate some space on the context stack for our purposes */
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 543 /* we manually unroll here, as usually 2 slots is enough */
397 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 */
398 553
399 c->dowarn = PL_dowarn;
400 c->in_eval = PL_in_eval;
401
402 c->curstackinfo = PL_curstackinfo;
403 c->curstack = PL_curstack;
404 c->mainstack = PL_mainstack; 554 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp; 555
406 c->op = PL_op; 556 {
407 c->curpad = PL_curpad; 557 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408 c->comppad = PL_comppad; 558
409 c->compcv = PL_compcv; 559 slot->defav = GvAV (PL_defgv);
410 c->stack_base = PL_stack_base; 560 slot->defsv = DEFSV;
411 c->stack_max = PL_stack_max; 561 slot->errsv = ERRSV;
412 c->tmps_stack = PL_tmps_stack; 562 slot->irsgv = GvSV (irsgv);
413 c->tmps_floor = PL_tmps_floor; 563
414 c->tmps_ix = PL_tmps_ix; 564 #define VAR(name,type) slot->name = PL_ ## name;
415 c->tmps_max = PL_tmps_max; 565 # include "state.h"
416 c->markstack = PL_markstack; 566 #undef VAR
417 c->markstack_ptr = PL_markstack_ptr; 567 }
418 c->markstack_max = PL_markstack_max;
419 c->scopestack = PL_scopestack;
420 c->scopestack_ix = PL_scopestack_ix;
421 c->scopestack_max = PL_scopestack_max;
422 c->savestack = PL_savestack;
423 c->savestack_ix = PL_savestack_ix;
424 c->savestack_max = PL_savestack_max;
425#if PERL_VERSION < 9
426 c->retstack = PL_retstack;
427 c->retstack_ix = PL_retstack_ix;
428 c->retstack_max = PL_retstack_max;
429#endif
430 c->curpm = PL_curpm;
431 c->curcop = PL_curcop;
432} 568}
433 569
434/* 570/*
435 * allocate various perl stacks. This is an exact copy 571 * allocate various perl stacks. This is an exact copy
436 * of perl.c:init_stacks, except that it uses less memory 572 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do 573 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace. 574 * not usually need a lot of stackspace.
439 */ 575 */
576#if CORO_PREFER_PERL_FUNCTIONS
577# define coro_init_stacks init_stacks
578#else
440static void 579static void
441coro_init_stacks (pTHX) 580coro_init_stacks (pTHX)
442{ 581{
443 LOCK; 582 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; 583 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 584 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 585 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 586
450 PL_stack_base = AvARRAY(PL_curstack); 587 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 588 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 589 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 590
454 New(50,PL_tmps_stack,96,SV*); 591 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 592 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 593 PL_tmps_ix = -1;
457 PL_tmps_max = 96; 594 PL_tmps_max = 32;
458 595
459 New(54,PL_markstack,16,I32); 596 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 597 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16; 598 PL_markstack_max = PL_markstack + 16;
462 599
463#ifdef SET_MARK_OFFSET 600#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 601 SET_MARK_OFFSET;
465#endif 602#endif
466 603
467 New(54,PL_scopestack,16,I32); 604 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 605 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16; 606 PL_scopestack_max = 8;
470 607
471 New(54,PL_savestack,96,ANY); 608 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 609 PL_savestack_ix = 0;
473 PL_savestack_max = 96; 610 PL_savestack_max = 24;
474 611
475#if PERL_VERSION < 9 612#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,8,OP*); 613 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 614 PL_retstack_ix = 0;
478 PL_retstack_max = 8; 615 PL_retstack_max = 4;
479#endif 616#endif
480
481 UNLOCK;
482} 617}
618#endif
483 619
484/* 620/*
485 * destroy the stacks, the callchain etc... 621 * destroy the stacks, the callchain etc...
486 */ 622 */
487static void 623static void
488destroy_stacks(pTHX) 624coro_destroy_stacks (pTHX)
489{ 625{
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) 626 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 627 PL_curstackinfo = PL_curstackinfo->si_next;
503 628
504 while (PL_curstackinfo) 629 while (PL_curstackinfo)
505 { 630 {
506 PERL_SI *p = PL_curstackinfo->si_prev; 631 PERL_SI *p = PL_curstackinfo->si_prev;
507 632
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT) 633 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack); 634 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519 635
520 Safefree (PL_curstackinfo->si_cxstack); 636 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo); 637 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p; 638 PL_curstackinfo = p;
523 } 639 }
524 640
525 Safefree (PL_tmps_stack); 641 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 642 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 643 Safefree (PL_scopestack);
528 Safefree (PL_savestack); 644 Safefree (PL_savestack);
529#if PERL_VERSION < 9 645#if !PERL_VERSION_ATLEAST (5,10,0)
530 Safefree (PL_retstack); 646 Safefree (PL_retstack);
531#endif 647#endif
532} 648}
533 649
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 rss += sizeof (slot->curstackinfo);
672 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
673 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
674 rss += slot->tmps_max * sizeof (SV *);
675 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
676 rss += slot->scopestack_max * sizeof (I32);
677 rss += slot->savestack_max * sizeof (ANY);
678
679#if !PERL_VERSION_ATLEAST (5,10,0)
680 rss += slot->retstack_max * sizeof (OP *);
681#endif
682 }
683
684 return rss;
685}
686
687/** coroutine stack handling ************************************************/
688
689static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
690static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
691static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
692
693/* apparently < 5.8.8 */
694#ifndef MgPV_nolen_const
695#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
696 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
697 (const char*)(mg)->mg_ptr)
698#endif
699
700/*
701 * This overrides the default magic get method of %SIG elements.
702 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
703 * and instead of tryign to save and restore the hash elements, we just provide
704 * readback here.
705 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
706 * not expecting this to actually change the hook. This is a potential problem
707 * when a schedule happens then, but we ignore this.
708 */
709static int
710coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
711{
712 const char *s = MgPV_nolen_const (mg);
713
714 if (*s == '_')
715 {
716 SV **svp = 0;
717
718 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
719 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
720
721 if (svp)
722 {
723 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
724 return 0;
725 }
726 }
727
728 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
729}
730
731static int
732coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
733{
734 const char *s = MgPV_nolen_const (mg);
735
736 if (*s == '_')
737 {
738 SV **svp = 0;
739
740 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
741 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
742
743 if (svp)
744 {
745 SV *old = *svp;
746 *svp = 0;
747 SvREFCNT_dec (old);
748 return 0;
749 }
750 }
751
752 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
753}
754
755static int
756coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
757{
758 const char *s = MgPV_nolen_const (mg);
759
760 if (*s == '_')
761 {
762 SV **svp = 0;
763
764 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
765 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
766
767 if (svp)
768 {
769 SV *old = *svp;
770 *svp = newSVsv (sv);
771 SvREFCNT_dec (old);
772 return 0;
773 }
774 }
775
776 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
777}
778
534static void 779static void
535setup_coro (struct coro *coro) 780coro_setup (pTHX_ struct coro *coro)
536{ 781{
537 /* 782 /*
538 * emulate part of the perl startup here. 783 * emulate part of the perl startup here.
539 */ 784 */
540 dTHX; 785 coro_init_stacks (aTHX);
786
787 PL_runops = RUNOPS_DEFAULT;
788 PL_curcop = &PL_compiling;
789 PL_in_eval = EVAL_NULL;
790 PL_comppad = 0;
791 PL_curpm = 0;
792 PL_curpad = 0;
793 PL_localizing = 0;
794 PL_dirty = 0;
795 PL_restartop = 0;
796#if PERL_VERSION_ATLEAST (5,10,0)
797 PL_parser = 0;
798#endif
799
800 /* recreate the die/warn hooks */
801 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
802 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
803
804 GvSV (PL_defgv) = newSV (0);
805 GvAV (PL_defgv) = coro->args; coro->args = 0;
806 GvSV (PL_errgv) = newSV (0);
807 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
808 PL_rs = newSVsv (GvSV (irsgv));
809 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
810
811 {
812 dSP;
813 LOGOP myop;
814
815 Zero (&myop, 1, LOGOP);
816 myop.op_next = Nullop;
817 myop.op_flags = OPf_WANT_VOID;
818
819 PUSHMARK (SP);
820 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
821 PUTBACK;
822 PL_op = (OP *)&myop;
823 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
824 SPAGAIN;
825 }
826
827 /* this newly created coroutine might be run on an existing cctx which most
828 * likely was suspended in set_stacklevel, called from entersub.
829 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
830 * so we ENTER here for symmetry
831 */
832 ENTER;
833}
834
835static void
836coro_destroy (pTHX_ struct coro *coro)
837{
838 if (!IN_DESTRUCT)
839 {
840 /* restore all saved variables and stuff */
841 LEAVE_SCOPE (0);
842 assert (PL_tmps_floor == -1);
843
844 /* free all temporaries */
845 FREETMPS;
846 assert (PL_tmps_ix == -1);
847
848 /* unwind all extra stacks */
849 POPSTACK_TO (PL_mainstack);
850
851 /* unwind main stack */
852 dounwind (-1);
853 }
854
855 SvREFCNT_dec (GvSV (PL_defgv));
856 SvREFCNT_dec (GvAV (PL_defgv));
857 SvREFCNT_dec (GvSV (PL_errgv));
858 SvREFCNT_dec (PL_defoutgv);
859 SvREFCNT_dec (PL_rs);
860 SvREFCNT_dec (GvSV (irsgv));
861
862 SvREFCNT_dec (PL_diehook);
863 SvREFCNT_dec (PL_warnhook);
864
865 SvREFCNT_dec (coro->saved_deffh);
866 SvREFCNT_dec (coro->throw);
867
868 coro_destroy_stacks (aTHX);
869}
870
871static void
872free_coro_mortal (pTHX)
873{
874 if (expect_true (coro_mortal))
875 {
876 SvREFCNT_dec (coro_mortal);
877 coro_mortal = 0;
878 }
879}
880
881static int
882runops_trace (pTHX)
883{
884 COP *oldcop = 0;
885 int oldcxix = -2;
886 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
887 coro_cctx *cctx = coro->cctx;
888
889 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
890 {
891 PERL_ASYNC_CHECK ();
892
893 if (cctx->flags & CC_TRACE_ALL)
894 {
895 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
896 {
897 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
898 SV **bot, **top;
899 AV *av = newAV (); /* return values */
900 SV **cb;
901 dSP;
902
903 GV *gv = CvGV (cx->blk_sub.cv);
904 SV *fullname = sv_2mortal (newSV (0));
905 if (isGV (gv))
906 gv_efullname3 (fullname, gv, 0);
907
908 bot = PL_stack_base + cx->blk_oldsp + 1;
909 top = cx->blk_gimme == G_ARRAY ? SP + 1
910 : cx->blk_gimme == G_SCALAR ? bot + 1
911 : bot;
912
913 av_extend (av, top - bot);
914 while (bot < top)
915 av_push (av, SvREFCNT_inc (*bot++));
916
917 PL_runops = RUNOPS_DEFAULT;
918 ENTER;
919 SAVETMPS;
920 EXTEND (SP, 3);
921 PUSHMARK (SP);
922 PUSHs (&PL_sv_no);
923 PUSHs (fullname);
924 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
925 PUTBACK;
926 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
927 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
928 SPAGAIN;
929 FREETMPS;
930 LEAVE;
931 PL_runops = runops_trace;
932 }
933
934 if (oldcop != PL_curcop)
935 {
936 oldcop = PL_curcop;
937
938 if (PL_curcop != &PL_compiling)
939 {
940 SV **cb;
941
942 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
943 {
944 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
945
946 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
947 {
948 runops_proc_t old_runops = PL_runops;
949 dSP;
950 GV *gv = CvGV (cx->blk_sub.cv);
951 SV *fullname = sv_2mortal (newSV (0));
952
953 if (isGV (gv))
954 gv_efullname3 (fullname, gv, 0);
955
956 PL_runops = RUNOPS_DEFAULT;
957 ENTER;
958 SAVETMPS;
959 EXTEND (SP, 3);
960 PUSHMARK (SP);
961 PUSHs (&PL_sv_yes);
962 PUSHs (fullname);
963 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
964 PUTBACK;
965 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
966 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
967 SPAGAIN;
968 FREETMPS;
969 LEAVE;
970 PL_runops = runops_trace;
971 }
972
973 oldcxix = cxstack_ix;
974 }
975
976 if (cctx->flags & CC_TRACE_LINE)
977 {
978 dSP;
979
980 PL_runops = RUNOPS_DEFAULT;
981 ENTER;
982 SAVETMPS;
983 EXTEND (SP, 3);
984 PL_runops = RUNOPS_DEFAULT;
985 PUSHMARK (SP);
986 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
987 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
988 PUTBACK;
989 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
990 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
991 SPAGAIN;
992 FREETMPS;
993 LEAVE;
994 PL_runops = runops_trace;
995 }
996 }
997 }
998 }
999 }
1000
1001 TAINT_NOT;
1002 return 0;
1003}
1004
1005/* inject a fake call to Coro::State::_cctx_init into the execution */
1006/* _cctx_init should be careful, as it could be called at almost any time */
1007/* during execution of a perl program */
1008static void NOINLINE
1009cctx_prepare (pTHX_ coro_cctx *cctx)
1010{
541 dSP; 1011 dSP;
542 UNOP myop; 1012 LOGOP myop;
543 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544 1013
545 coro_init_stacks (aTHX); 1014 PL_top_env = &PL_start_env;
546 /*PL_curcop = 0;*/
547 /*PL_in_eval = PL_in_eval;*/ /* inherit */
548 SvREFCNT_dec (GvAV (PL_defgv));
549 GvAV (PL_defgv) = coro->args; coro->args = 0;
550 1015
551 SPAGAIN; 1016 if (cctx->flags & CC_TRACE)
1017 PL_runops = runops_trace;
552 1018
553 Zero (&myop, 1, UNOP); 1019 Zero (&myop, 1, LOGOP);
554 myop.op_next = Nullop; 1020 myop.op_next = PL_op;
555 myop.op_flags = OPf_WANT_VOID; 1021 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556 1022
1023 PUSHMARK (SP);
1024 EXTEND (SP, 2);
1025 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1026 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1027 PUTBACK;
557 PL_op = (OP *)&myop; 1028 PL_op = (OP *)&myop;
558
559 PUSHMARK(SP);
560 XPUSHs (sub_init);
561 PUTBACK;
562 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1029 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563 SPAGAIN; 1030 SPAGAIN;
564
565 ENTER; /* necessary e.g. for dounwind */
566} 1031}
567 1032
1033/*
1034 * this is a _very_ stripped down perl interpreter ;)
1035 */
568static void 1036static void
569free_coro_mortal () 1037cctx_run (void *arg)
570{ 1038{
571 if (coro_mortal) 1039 dTHX;
572 { 1040
573 SvREFCNT_dec (coro_mortal); 1041 /* cctx_run is the alternative tail of transfer(), so unlock here. */
574 coro_mortal = 0; 1042 UNLOCK;
1043
1044 /* we now skip the entersub that lead to transfer() */
1045 PL_op = PL_op->op_next;
1046
1047 /* inject a fake subroutine call to cctx_init */
1048 cctx_prepare (aTHX_ (coro_cctx *)arg);
1049
1050 /* somebody or something will hit me for both perl_run and PL_restartop */
1051 PL_restartop = PL_op;
1052 perl_run (PL_curinterp);
1053
1054 /*
1055 * If perl-run returns we assume exit() was being called or the coro
1056 * fell off the end, which seems to be the only valid (non-bug)
1057 * reason for perl_run to return. We try to exit by jumping to the
1058 * bootstrap-time "top" top_env, as we cannot restore the "main"
1059 * coroutine as Coro has no such concept
1060 */
1061 PL_top_env = main_top_env;
1062 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1063}
1064
1065static coro_cctx *
1066cctx_new ()
1067{
1068 coro_cctx *cctx;
1069 void *stack_start;
1070 size_t stack_size;
1071
1072 ++cctx_count;
1073
1074 Newz (0, cctx, 1, coro_cctx);
1075
1076#if HAVE_MMAP
1077 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1078 /* mmap supposedly does allocate-on-write for us */
1079 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1080
1081 if (cctx->sptr != (void *)-1)
575 } 1082 {
1083# if CORO_STACKGUARD
1084 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1085# endif
1086 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1087 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1088 cctx->flags |= CC_MAPPED;
1089 }
1090 else
1091#endif
1092 {
1093 cctx->ssize = coro_stacksize * (long)sizeof (long);
1094 New (0, cctx->sptr, coro_stacksize, long);
1095
1096 if (!cctx->sptr)
1097 {
1098 perror ("FATAL: unable to allocate stack for coroutine");
1099 _exit (EXIT_FAILURE);
1100 }
1101
1102 stack_start = cctx->sptr;
1103 stack_size = cctx->ssize;
1104 }
1105
1106 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1107 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1108
1109 return cctx;
576} 1110}
577 1111
578static void 1112static void
579coro_run (void *arg) 1113cctx_destroy (coro_cctx *cctx)
580{ 1114{
581 /* 1115 if (!cctx)
582 * this is a _very_ stripped down perl interpreter ;) 1116 return;
583 */
584 dTHX;
585 int ret;
586 1117
587 UNLOCK; 1118 --cctx_count;
588 1119
589 PL_top_env = &PL_start_env; 1120#if CORO_USE_VALGRIND
590 1121 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
591 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1122#endif
592 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
593
594 /* continue at cctx_init, without entersub */
595 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597 /* somebody will hit me for both perl_run and PL_restartop */
598 ret = perl_run (aTHX_ PERL_GET_CONTEXT);
599 printf ("ret %d\n", ret);//D
600
601 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
602 abort ();
603}
604
605static coro_stack *
606stack_new ()
607{
608 coro_stack *stack;
609
610 New (0, stack, 1, coro_stack);
611 1123
612#if HAVE_MMAP 1124#if HAVE_MMAP
613 1125 if (cctx->flags & CC_MAPPED)
614 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1126 munmap (cctx->sptr, cctx->ssize);
615 /* mmap suppsedly does allocate-on-write for us */ 1127 else
616 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
617
618 if (stack->sptr == (void *)-1)
619 {
620 perror ("FATAL: unable to mmap stack for coroutine");
621 _exit (EXIT_FAILURE);
622 }
623
624# if STACKGUARD
625 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
626# endif 1128#endif
1129 Safefree (cctx->sptr);
627 1130
628#else 1131 Safefree (cctx);
1132}
629 1133
630 stack->ssize = STACKSIZE * (long)sizeof (long); 1134/* wether this cctx should be destructed */
631 New (0, stack->sptr, STACKSIZE, long); 1135#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
632 1136
633 if (!stack->sptr) 1137static coro_cctx *
634 { 1138cctx_get (pTHX)
635 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1139{
636 _exit (EXIT_FAILURE); 1140 while (expect_true (cctx_first))
637 } 1141 {
1142 coro_cctx *cctx = cctx_first;
1143 cctx_first = cctx->next;
1144 --cctx_idle;
638 1145
639#endif 1146 if (expect_true (!CCTX_EXPIRED (cctx)))
1147 return cctx;
640 1148
641 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1149 cctx_destroy (cctx);
1150 }
642 1151
643 return stack; 1152 return cctx_new ();
644} 1153}
645 1154
646static void 1155static void
647stack_free (coro_stack *stack) 1156cctx_put (coro_cctx *cctx)
648{ 1157{
649 if (!stack) 1158 /* free another cctx if overlimit */
650 return; 1159 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
651
652#if HAVE_MMAP
653 munmap (stack->sptr, stack->ssize);
654#else
655 Safefree (stack->sptr);
656#endif
657
658 Safefree (stack);
659}
660
661static coro_stack *stack_first;
662
663static coro_stack *
664stack_get ()
665{
666 coro_stack *stack;
667
668 if (stack_first)
669 {
670 stack = stack_first;
671 stack_first = stack->next;
672 }
673 else
674 { 1160 {
675 stack = stack_new (); 1161 coro_cctx *first = cctx_first;
676 PL_op = PL_op->op_next; 1162 cctx_first = first->next;
1163 --cctx_idle;
1164
1165 cctx_destroy (first);
677 } 1166 }
678 1167
679 return stack; 1168 ++cctx_idle;
1169 cctx->next = cctx_first;
1170 cctx_first = cctx;
680} 1171}
1172
1173/** coroutine switching *****************************************************/
681 1174
682static void 1175static void
683stack_put (coro_stack *stack) 1176transfer_check (pTHX_ struct coro *prev, struct coro *next)
684{ 1177{
685 stack->next = stack_first; 1178 if (expect_true (prev != next))
686 stack_first = stack; 1179 {
687} 1180 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1181 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
688 1182
689/* never call directly, always through the coro_state_transfer global variable */ 1183 if (expect_false (next->flags & CF_RUNNING))
690static void 1184 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1185
1186 if (expect_false (next->flags & CF_DESTROYED))
1187 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1188
1189#if !PERL_VERSION_ATLEAST (5,10,0)
1190 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1191 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1192#endif
1193 }
1194}
1195
1196/* always use the TRANSFER macro */
1197static void NOINLINE
691transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1198transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
692{ 1199{
693 dSTACKLEVEL; 1200 dSTACKLEVEL;
1201 static volatile int has_throw;
694 1202
695 /* sometimes transfer is only called to set idle_sp */ 1203 /* sometimes transfer is only called to set idle_sp */
696 if (flags == TRANSFER_SET_STACKLEVEL) 1204 if (expect_false (!next))
1205 {
697 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1206 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
698 else if (prev != next) 1207 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
699 { 1208 }
1209 else if (expect_true (prev != next))
1210 {
700 coro_stack *prev__stack; 1211 coro_cctx *prev__cctx;
1212
1213 if (expect_false (prev->flags & CF_NEW))
1214 {
1215 /* create a new empty context */
1216 Newz (0, prev->cctx, 1, coro_cctx);
1217 prev->flags &= ~CF_NEW;
1218 prev->flags |= CF_RUNNING;
1219 }
1220
1221 prev->flags &= ~CF_RUNNING;
1222 next->flags |= CF_RUNNING;
701 1223
702 LOCK; 1224 LOCK;
703 1225
704 if (next->mainstack) 1226 /* first get rid of the old state */
1227 save_perl (aTHX_ prev);
1228
1229 if (expect_false (next->flags & CF_NEW))
705 { 1230 {
706 /* coroutine already started */ 1231 /* need to start coroutine */
707 SAVE (prev, flags); 1232 next->flags &= ~CF_NEW;
708 LOAD (next); 1233 /* setup coroutine call */
1234 coro_setup (aTHX_ next);
709 } 1235 }
710 else 1236 else
1237 load_perl (aTHX_ next);
1238
1239 prev__cctx = prev->cctx;
1240
1241 /* possibly "free" the cctx */
1242 if (expect_true (
1243 prev__cctx->idle_sp == STACKLEVEL
1244 && !(prev__cctx->flags & CC_TRACE)
1245 && !force_cctx
1246 ))
711 { 1247 {
712 /* need to start coroutine */ 1248 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
713 /* first get rid of the old state */ 1249 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
714 SAVE (prev, -1); 1250
715 /* setup coroutine call */ 1251 prev->cctx = 0;
716 setup_coro (next); 1252
717 /* need a stack */ 1253 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
718 next->stack = 0; 1254 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1255 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1256 if (!next->cctx)
1257 next->cctx = cctx_get (aTHX);
1258
1259 cctx_put (prev__cctx);
719 } 1260 }
720 1261
721 if (!prev->stack) 1262 ++next->usecount;
722 /* create a new empty context */
723 Newz (0, prev->stack, 1, coro_stack);
724 1263
725 prev__stack = prev->stack; 1264 if (expect_true (!next->cctx))
1265 next->cctx = cctx_get (aTHX);
726 1266
727 /* possibly "free" the stack */ 1267 has_throw = !!next->throw;
728 if (prev__stack->idle_sp == STACKLEVEL) 1268
1269 if (expect_false (prev__cctx != next->cctx))
729 { 1270 {
730 stack_put (prev__stack); 1271 prev__cctx->top_env = PL_top_env;
731 prev->stack = 0; 1272 PL_top_env = next->cctx->top_env;
1273 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
732 } 1274 }
733 1275
734 if (!next->stack) 1276 free_coro_mortal (aTHX);
735 next->stack = stack_get (); 1277 UNLOCK;
736 1278
737 if (prev__stack != next->stack) 1279 if (expect_false (has_throw))
738 { 1280 {
739 prev__stack->top_env = PL_top_env; 1281 struct coro *coro = SvSTATE (coro_current);
740 PL_top_env = next->stack->top_env; 1282
741 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1283 if (coro->throw)
1284 {
1285 SV *exception = coro->throw;
1286 coro->throw = 0;
1287 sv_setsv (ERRSV, exception);
1288 croak (0);
1289 }
742 } 1290 }
1291 }
1292}
743 1293
744 free_coro_mortal (); 1294struct transfer_args
1295{
1296 struct coro *prev, *next;
1297};
745 1298
1299#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1300#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1301
1302/** high level stuff ********************************************************/
1303
1304static int
1305coro_state_destroy (pTHX_ struct coro *coro)
1306{
1307 if (coro->flags & CF_DESTROYED)
1308 return 0;
1309
1310 coro->flags |= CF_DESTROYED;
1311
1312 if (coro->flags & CF_READY)
1313 {
1314 /* reduce nready, as destroying a ready coro effectively unreadies it */
1315 /* alternative: look through all ready queues and remove the coro */
1316 LOCK;
1317 --coro_nready;
746 UNLOCK; 1318 UNLOCK;
747 } 1319 }
748} 1320 else
749 1321 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
750/* use this function pointer to call the above function */
751/* this is done to increase chances of the compiler not inlining the call */
752/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755struct transfer_args
756{
757 struct coro *prev, *next;
758 int flags;
759};
760
761#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
762
763static void
764coro_state_destroy (struct coro *coro)
765{
766 if (coro->refcnt--)
767 return;
768 1322
769 if (coro->mainstack && coro->mainstack != main_mainstack) 1323 if (coro->mainstack && coro->mainstack != main_mainstack)
770 { 1324 {
771 struct coro temp; 1325 struct coro temp;
772 1326
773 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1327 if (coro->flags & CF_RUNNING)
1328 croak ("FATAL: tried to destroy currently running coroutine");
1329
1330 save_perl (aTHX_ &temp);
774 LOAD (aTHX_ coro); 1331 load_perl (aTHX_ coro);
775 1332
776 destroy_stacks (aTHX); 1333 coro_destroy (aTHX_ coro);
777 1334
778 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1335 load_perl (aTHX_ &temp);
779 1336
780 coro->mainstack = 0; 1337 coro->slot = 0;
781 } 1338 }
782 1339
783 stack_free (coro->stack); 1340 cctx_destroy (coro->cctx);
784 SvREFCNT_dec (coro->args); 1341 SvREFCNT_dec (coro->args);
785 Safefree (coro); 1342
1343 if (coro->next) coro->next->prev = coro->prev;
1344 if (coro->prev) coro->prev->next = coro->next;
1345 if (coro == coro_first) coro_first = coro->next;
1346
1347 return 1;
786} 1348}
787 1349
788static int 1350static int
789coro_state_clear (SV *sv, MAGIC *mg) 1351coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790{ 1352{
791 struct coro *coro = (struct coro *)mg->mg_ptr; 1353 struct coro *coro = (struct coro *)mg->mg_ptr;
792 mg->mg_ptr = 0; 1354 mg->mg_ptr = 0;
793 1355
1356 coro->hv = 0;
1357
1358 if (--coro->refcnt < 0)
1359 {
794 coro_state_destroy (coro); 1360 coro_state_destroy (aTHX_ coro);
1361 Safefree (coro);
1362 }
795 1363
796 return 0; 1364 return 0;
797} 1365}
798 1366
799static int 1367static int
800coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1368coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801{ 1369{
802 struct coro *coro = (struct coro *)mg->mg_ptr; 1370 struct coro *coro = (struct coro *)mg->mg_ptr;
803 1371
804 ++coro->refcnt; 1372 ++coro->refcnt;
805 1373
806 return 0; 1374 return 0;
807} 1375}
808 1376
809static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1377static MGVTBL coro_state_vtbl = {
810 1378 0, 0, 0, 0,
811static struct coro * 1379 coro_state_free,
812SvSTATE (SV *coro) 1380 0,
813{ 1381#ifdef MGf_DUP
814 HV *stash; 1382 coro_state_dup,
815 MAGIC *mg; 1383#else
816 1384# define MGf_DUP 0
817 if (SvROK (coro)) 1385#endif
818 coro = SvRV (coro); 1386};
819
820 stash = SvSTASH (coro);
821 if (stash != coro_stash && stash != coro_state_stash)
822 {
823 /* very slow, but rare, check */
824 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825 croak ("Coro::State object required");
826 }
827
828 mg = SvMAGIC (coro);
829 assert (mg->mg_type == PERL_MAGIC_ext);
830 return (struct coro *)mg->mg_ptr;
831}
832 1387
833static void 1388static void
834prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags) 1389prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835{ 1390{
836 ta->prev = SvSTATE (prev); 1391 ta->prev = SvSTATE (prev_sv);
837 ta->next = SvSTATE (next); 1392 ta->next = SvSTATE (next_sv);
838 ta->flags = flags; 1393 TRANSFER_CHECK (*ta);
839} 1394}
840 1395
841static void 1396static void
842api_transfer (SV *prev, SV *next, int flags) 1397api_transfer (SV *prev_sv, SV *next_sv)
843{ 1398{
844 dTHX; 1399 dTHX;
845 struct transfer_args ta; 1400 struct transfer_args ta;
846 1401
847 prepare_transfer (aTHX_ &ta, prev, next, flags); 1402 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848 TRANSFER (ta); 1403 TRANSFER (ta, 1);
849} 1404}
850 1405
851/** Coro ********************************************************************/ 1406/** Coro ********************************************************************/
852 1407
853#define PRIO_MAX 3
854#define PRIO_HIGH 1
855#define PRIO_NORMAL 0
856#define PRIO_LOW -1
857#define PRIO_IDLE -3
858#define PRIO_MIN -4
859
860/* for Coro.pm */
861static GV *coro_current, *coro_idle;
862static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863static int coro_nready;
864
865static void 1408static void
866coro_enq (pTHX_ SV *sv) 1409coro_enq (pTHX_ SV *coro_sv)
1410{
1411 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1412}
1413
1414static SV *
1415coro_deq (pTHX)
867{ 1416{
868 int prio; 1417 int prio;
869 1418
870 if (SvTYPE (sv) != SVt_PVHV)
871 croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873 prio = SvSTATE (sv)->prio;
874
875 av_push (coro_ready [prio - PRIO_MIN], sv);
876 coro_nready++;
877}
878
879static SV *
880coro_deq (pTHX_ int min_prio)
881{
882 int prio = PRIO_MAX - PRIO_MIN;
883
884 min_prio -= PRIO_MIN;
885 if (min_prio < 0)
886 min_prio = 0;
887
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1419 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
889 if (AvFILLp (coro_ready [prio]) >= 0) 1420 if (AvFILLp (coro_ready [prio]) >= 0)
890 {
891 coro_nready--;
892 return av_shift (coro_ready [prio]); 1421 return av_shift (coro_ready [prio]);
893 }
894 1422
895 return 0; 1423 return 0;
896} 1424}
897 1425
1426static int
1427api_ready (SV *coro_sv)
1428{
1429 dTHX;
1430 struct coro *coro;
1431 SV *sv_hook;
1432 void (*xs_hook)(void);
1433
1434 if (SvROK (coro_sv))
1435 coro_sv = SvRV (coro_sv);
1436
1437 coro = SvSTATE (coro_sv);
1438
1439 if (coro->flags & CF_READY)
1440 return 0;
1441
1442 coro->flags |= CF_READY;
1443
1444 LOCK;
1445
1446 sv_hook = coro_nready ? 0 : coro_readyhook;
1447 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1448
1449 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1450 ++coro_nready;
1451
1452 UNLOCK;
1453
1454 if (sv_hook)
1455 {
1456 dSP;
1457
1458 ENTER;
1459 SAVETMPS;
1460
1461 PUSHMARK (SP);
1462 PUTBACK;
1463 call_sv (sv_hook, G_DISCARD);
1464 SPAGAIN;
1465
1466 FREETMPS;
1467 LEAVE;
1468 }
1469
1470 if (xs_hook)
1471 xs_hook ();
1472
1473 return 1;
1474}
1475
1476static int
1477api_is_ready (SV *coro_sv)
1478{
1479 dTHX;
1480 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1481}
1482
898static void 1483static void
899api_ready (SV *coro) 1484prepare_schedule (pTHX_ struct transfer_args *ta)
900{ 1485{
901 dTHX; 1486 SV *prev_sv, *next_sv;
902 1487
903 if (SvROK (coro)) 1488 for (;;)
904 coro = SvRV (coro); 1489 {
1490 LOCK;
1491 next_sv = coro_deq (aTHX);
1492
1493 /* nothing to schedule: call the idle handler */
1494 if (expect_false (!next_sv))
1495 {
1496 dSP;
1497 UNLOCK;
1498
1499 ENTER;
1500 SAVETMPS;
1501
1502 PUSHMARK (SP);
1503 PUTBACK;
1504 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1505 SPAGAIN;
1506
1507 FREETMPS;
1508 LEAVE;
1509 continue;
1510 }
1511
1512 ta->next = SvSTATE (next_sv);
1513
1514 /* cannot transfer to destroyed coros, skip and look for next */
1515 if (expect_false (ta->next->flags & CF_DESTROYED))
1516 {
1517 UNLOCK;
1518 SvREFCNT_dec (next_sv);
1519 /* coro_nready is already taken care of by destroy */
1520 continue;
1521 }
1522
1523 --coro_nready;
1524 UNLOCK;
1525 break;
1526 }
1527
1528 /* free this only after the transfer */
1529 prev_sv = SvRV (coro_current);
1530 ta->prev = SvSTATE (prev_sv);
1531 TRANSFER_CHECK (*ta);
1532 assert (ta->next->flags & CF_READY);
1533 ta->next->flags &= ~CF_READY;
1534 SvRV_set (coro_current, next_sv);
905 1535
906 LOCK; 1536 LOCK;
907 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1537 free_coro_mortal (aTHX);
1538 coro_mortal = prev_sv;
908 UNLOCK; 1539 UNLOCK;
909} 1540}
910 1541
911static void 1542static void
912prepare_schedule (aTHX_ struct transfer_args *ta)
913{
914 SV *current, *prev, *next;
915
916 LOCK;
917
918 current = GvSV (coro_current);
919
920 for (;;)
921 {
922 LOCK;
923
924 next = coro_deq (aTHX_ PRIO_MIN);
925
926 if (next)
927 break;
928
929 UNLOCK;
930
931 {
932 dSP;
933
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 }
944 }
945
946 prev = SvRV (current);
947 SvRV (current) = next;
948
949 /* free this only after the transfer */
950 free_coro_mortal ();
951 coro_mortal = prev;
952
953 ta->prev = SvSTATE (prev);
954 ta->next = SvSTATE (next);
955 ta->flags = TRANSFER_SAVE_ALL;
956
957 UNLOCK;
958}
959
960static void
961prepare_cede (aTHX_ struct transfer_args *ta) 1543prepare_cede (pTHX_ struct transfer_args *ta)
962{ 1544{
963 LOCK; 1545 api_ready (coro_current);
964 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966
967 prepare_schedule (ta); 1546 prepare_schedule (aTHX_ ta);
1547}
1548
1549static int
1550prepare_cede_notself (pTHX_ struct transfer_args *ta)
1551{
1552 if (coro_nready)
1553 {
1554 SV *prev = SvRV (coro_current);
1555 prepare_schedule (aTHX_ ta);
1556 api_ready (prev);
1557 return 1;
1558 }
1559 else
1560 return 0;
968} 1561}
969 1562
970static void 1563static void
971api_schedule (void) 1564api_schedule (void)
972{ 1565{
973 dTHX; 1566 dTHX;
974 struct transfer_args ta; 1567 struct transfer_args ta;
975 1568
976 prepare_schedule (&ta); 1569 prepare_schedule (aTHX_ &ta);
977 TRANSFER (ta); 1570 TRANSFER (ta, 1);
978} 1571}
979 1572
980static void 1573static int
981api_cede (void) 1574api_cede (void)
982{ 1575{
983 dTHX; 1576 dTHX;
984 struct transfer_args ta; 1577 struct transfer_args ta;
985 1578
986 prepare_cede (&ta); 1579 prepare_cede (aTHX_ &ta);
1580
1581 if (expect_true (ta.prev != ta.next))
1582 {
987 TRANSFER (ta); 1583 TRANSFER (ta, 1);
1584 return 1;
1585 }
1586 else
1587 return 0;
988} 1588}
989 1589
1590static int
1591api_cede_notself (void)
1592{
1593 dTHX;
1594 struct transfer_args ta;
1595
1596 if (prepare_cede_notself (aTHX_ &ta))
1597 {
1598 TRANSFER (ta, 1);
1599 return 1;
1600 }
1601 else
1602 return 0;
1603}
1604
1605static void
1606api_trace (SV *coro_sv, int flags)
1607{
1608 dTHX;
1609 struct coro *coro = SvSTATE (coro_sv);
1610
1611 if (flags & CC_TRACE)
1612 {
1613 if (!coro->cctx)
1614 coro->cctx = cctx_new ();
1615 else if (!(coro->cctx->flags & CC_TRACE))
1616 croak ("cannot enable tracing on coroutine with custom stack");
1617
1618 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1619 }
1620 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1621 {
1622 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1623
1624 if (coro->flags & CF_RUNNING)
1625 PL_runops = RUNOPS_DEFAULT;
1626 else
1627 coro->slot->runops = RUNOPS_DEFAULT;
1628 }
1629}
1630
1631static int
1632coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1633{
1634 AV *padlist;
1635 AV *av = (AV *)mg->mg_obj;
1636
1637 abort ();
1638
1639 return 0;
1640}
1641
1642static MGVTBL coro_gensub_vtbl = {
1643 0, 0, 0, 0,
1644 coro_gensub_free
1645};
1646
990MODULE = Coro::State PACKAGE = Coro::State 1647MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 1648
992PROTOTYPES: DISABLE 1649PROTOTYPES: DISABLE
993 1650
994BOOT: 1651BOOT:
995{ 1652{
996#ifdef USE_ITHREADS 1653#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 1654 MUTEX_INIT (&coro_mutex);
998#endif 1655#endif
999 BOOT_PAGESIZE; 1656 BOOT_PAGESIZE;
1000 1657
1658 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1659 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1660
1661 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1662 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1663 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1664
1665 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1666 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1667 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1668
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1669 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 1670
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1671 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1672 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1673 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1674 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006 1675
1007 main_mainstack = PL_mainstack; 1676 main_mainstack = PL_mainstack;
1677 main_top_env = PL_top_env;
1008 1678
1679 while (main_top_env->je_prev)
1680 main_top_env = main_top_env->je_prev;
1681
1009 coroapi.ver = CORO_API_VERSION; 1682 coroapi.ver = CORO_API_VERSION;
1683 coroapi.rev = CORO_API_REVISION;
1010 coroapi.transfer = api_transfer; 1684 coroapi.transfer = api_transfer;
1011 1685
1012 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1686 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1013} 1687}
1014 1688
1015SV * 1689SV *
1016new (char *klass, ...) 1690new (char *klass, ...)
1017 CODE: 1691 CODE:
1018{ 1692{
1019 struct coro *coro; 1693 struct coro *coro;
1694 MAGIC *mg;
1020 HV *hv; 1695 HV *hv;
1021 int i; 1696 int i;
1022 1697
1023 Newz (0, coro, 1, struct coro); 1698 Newz (0, coro, 1, struct coro);
1024 coro->args = newAV (); 1699 coro->args = newAV ();
1700 coro->flags = CF_NEW;
1025 1701
1702 if (coro_first) coro_first->prev = coro;
1703 coro->next = coro_first;
1704 coro_first = coro;
1705
1026 hv = newHV (); 1706 coro->hv = hv = newHV ();
1027 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1707 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1708 mg->mg_flags |= MGf_DUP;
1028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1709 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029 1710
1711 av_extend (coro->args, items - 1);
1030 for (i = 1; i < items; i++) 1712 for (i = 1; i < items; i++)
1031 av_push (coro->args, newSVsv (ST (i))); 1713 av_push (coro->args, newSVsv (ST (i)));
1032
1033 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1034 /*coro->stack = 0;*/
1035} 1714}
1036 OUTPUT: 1715 OUTPUT:
1037 RETVAL 1716 RETVAL
1038 1717
1718# these not obviously related functions are all rolled into the same xs
1719# function to increase chances that they all will call transfer with the same
1720# stack offset
1039void 1721void
1040_set_stacklevel (...) 1722_set_stacklevel (...)
1041 ALIAS: 1723 ALIAS:
1042 Coro::State::transfer = 1 1724 Coro::State::transfer = 1
1043 Coro::schedule = 2 1725 Coro::schedule = 2
1044 Coro::cede = 3 1726 Coro::cede = 3
1045 Coro::Cont::yield = 4 1727 Coro::cede_notself = 4
1046 CODE: 1728 CODE:
1047{ 1729{
1048 struct transfer_args ta; 1730 struct transfer_args ta;
1049 1731
1732 PUTBACK;
1050 switch (ix) 1733 switch (ix)
1051 { 1734 {
1052 case 0: 1735 case 0:
1053 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1736 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054 ta.next = 0; 1737 ta.next = 0;
1055 ta.flags = TRANSFER_SET_STACKLEVEL;
1056 break; 1738 break;
1057 1739
1058 case 1: 1740 case 1:
1059 if (items != 3) 1741 if (items != 2)
1060 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1742 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061 1743
1062 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1744 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063 break; 1745 break;
1064 1746
1065 case 2: 1747 case 2:
1066 prepare_schedule (&ta); 1748 prepare_schedule (aTHX_ &ta);
1067 break; 1749 break;
1068 1750
1069 case 3: 1751 case 3:
1070 prepare_cede (&ta); 1752 prepare_cede (aTHX_ &ta);
1071 break; 1753 break;
1072 1754
1073 case 4: 1755 case 4:
1074 { 1756 if (!prepare_cede_notself (aTHX_ &ta))
1075 SV *yieldstack; 1757 XSRETURN_EMPTY;
1076 SV *sv;
1077 AV *defav = GvAV (PL_defgv);
1078 1758
1079 yieldstack = *hv_fetch (
1080 (HV *)SvRV (GvSV (coro_current)),
1081 "yieldstack", sizeof ("yieldstack") - 1,
1082 0
1083 );
1084
1085 /* set up @_ -- ugly */
1086 av_clear (defav);
1087 av_fill (defav, items - 1);
1088 while (items--)
1089 av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091 sv = av_pop ((AV *)SvRV (yieldstack));
1092 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094 ta.flags = 0;
1095 SvREFCNT_dec (sv);
1096 }
1097 break; 1759 break;
1098
1099 } 1760 }
1761 SPAGAIN;
1100 1762
1763 BARRIER;
1764 PUTBACK;
1101 TRANSFER (ta); 1765 TRANSFER (ta, 0);
1766 SPAGAIN; /* might be the sp of a different coroutine now */
1767 /* be extra careful not to ever do anything after TRANSFER */
1102} 1768}
1769
1770bool
1771_destroy (SV *coro_sv)
1772 CODE:
1773 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1774 OUTPUT:
1775 RETVAL
1103 1776
1104void 1777void
1105_clone_state_from (SV *dst, SV *src)
1106 CODE:
1107{
1108 struct coro *coro_src = SvSTATE (src);
1109
1110 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112 ++coro_src->refcnt;
1113 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114}
1115
1116void
1117_nonlocal_goto (IV nextop)
1118 CODE:
1119 /* uuh, somebody will kill me again for this */
1120 PL_op->op_next = INT2PTR (OP *, nextop);
1121
1122void
1123_exit (code) 1778_exit (int code)
1124 int code
1125 PROTOTYPE: $ 1779 PROTOTYPE: $
1126 CODE: 1780 CODE:
1127 _exit (code); 1781 _exit (code);
1128 1782
1783int
1784cctx_stacksize (int new_stacksize = 0)
1785 CODE:
1786 RETVAL = coro_stacksize;
1787 if (new_stacksize)
1788 coro_stacksize = new_stacksize;
1789 OUTPUT:
1790 RETVAL
1791
1792int
1793cctx_count ()
1794 CODE:
1795 RETVAL = cctx_count;
1796 OUTPUT:
1797 RETVAL
1798
1799int
1800cctx_idle ()
1801 CODE:
1802 RETVAL = cctx_idle;
1803 OUTPUT:
1804 RETVAL
1805
1806void
1807list ()
1808 PPCODE:
1809{
1810 struct coro *coro;
1811 for (coro = coro_first; coro; coro = coro->next)
1812 if (coro->hv)
1813 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1814}
1815
1816void
1817call (Coro::State coro, SV *coderef)
1818 ALIAS:
1819 eval = 1
1820 CODE:
1821{
1822 if (coro->mainstack)
1823 {
1824 struct coro temp;
1825
1826 if (!(coro->flags & CF_RUNNING))
1827 {
1828 PUTBACK;
1829 save_perl (aTHX_ &temp);
1830 load_perl (aTHX_ coro);
1831 }
1832
1833 {
1834 dSP;
1835 ENTER;
1836 SAVETMPS;
1837 PUTBACK;
1838 PUSHSTACK;
1839 PUSHMARK (SP);
1840
1841 if (ix)
1842 eval_sv (coderef, 0);
1843 else
1844 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1845
1846 POPSTACK;
1847 SPAGAIN;
1848 FREETMPS;
1849 LEAVE;
1850 PUTBACK;
1851 }
1852
1853 if (!(coro->flags & CF_RUNNING))
1854 {
1855 save_perl (aTHX_ coro);
1856 load_perl (aTHX_ &temp);
1857 SPAGAIN;
1858 }
1859 }
1860}
1861
1862SV *
1863is_ready (Coro::State coro)
1864 PROTOTYPE: $
1865 ALIAS:
1866 is_ready = CF_READY
1867 is_running = CF_RUNNING
1868 is_new = CF_NEW
1869 is_destroyed = CF_DESTROYED
1870 CODE:
1871 RETVAL = boolSV (coro->flags & ix);
1872 OUTPUT:
1873 RETVAL
1874
1875void
1876api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1877
1878SV *
1879has_cctx (Coro::State coro)
1880 PROTOTYPE: $
1881 CODE:
1882 RETVAL = boolSV (!!coro->cctx);
1883 OUTPUT:
1884 RETVAL
1885
1886int
1887is_traced (Coro::State coro)
1888 PROTOTYPE: $
1889 CODE:
1890 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1891 OUTPUT:
1892 RETVAL
1893
1894IV
1895rss (Coro::State coro)
1896 PROTOTYPE: $
1897 ALIAS:
1898 usecount = 1
1899 CODE:
1900 switch (ix)
1901 {
1902 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1903 case 1: RETVAL = coro->usecount; break;
1904 }
1905 OUTPUT:
1906 RETVAL
1907
1908void
1909force_cctx ()
1910 CODE:
1911 struct coro *coro = SvSTATE (coro_current);
1912 coro->cctx->idle_sp = 0;
1913
1914void
1915throw (Coro::State self, SV *throw = &PL_sv_undef)
1916 PROTOTYPE: $;$
1917 CODE:
1918 SvREFCNT_dec (self->throw);
1919 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1920
1921void
1922swap_defsv (Coro::State self)
1923 PROTOTYPE: $
1924 ALIAS:
1925 swap_defav = 1
1926 CODE:
1927 if (!self->slot)
1928 croak ("cannot swap state with coroutine that has no saved state");
1929 else
1930 {
1931 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1932 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1933
1934 SV *tmp = *src; *src = *dst; *dst = tmp;
1935 }
1936
1129MODULE = Coro::State PACKAGE = Coro 1937MODULE = Coro::State PACKAGE = Coro
1130 1938
1131BOOT: 1939BOOT:
1132{ 1940{
1133 int i; 1941 int i;
1134 1942
1943 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1944 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1945 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1946
1947 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1948 SvREADONLY_on (coro_current);
1949
1135 coro_stash = gv_stashpv ("Coro", TRUE); 1950 coro_stash = gv_stashpv ("Coro", TRUE);
1136 1951
1137 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1952 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1953 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1954 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1955 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1956 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1957 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143 1958
1144 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1959 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148 coro_ready[i] = newAV (); 1960 coro_ready[i] = newAV ();
1149 1961
1150 { 1962 {
1151 SV *sv = perl_get_sv("Coro::API", 1); 1963 SV *sv = perl_get_sv ("Coro::API", TRUE);
1964 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1152 1965
1153 coroapi.schedule = api_schedule; 1966 coroapi.schedule = api_schedule;
1154 coroapi.cede = api_cede; 1967 coroapi.cede = api_cede;
1968 coroapi.cede_notself = api_cede_notself;
1155 coroapi.ready = api_ready; 1969 coroapi.ready = api_ready;
1970 coroapi.is_ready = api_is_ready;
1156 coroapi.nready = &coro_nready; 1971 coroapi.nready = &coro_nready;
1157 coroapi.current = coro_current; 1972 coroapi.current = coro_current;
1158 1973
1159 GCoroAPI = &coroapi; 1974 GCoroAPI = &coroapi;
1160 sv_setiv (sv, (IV)&coroapi); 1975 sv_setiv (sv, (IV)&coroapi);
1161 SvREADONLY_on (sv); 1976 SvREADONLY_on (sv);
1162 } 1977 }
1163} 1978}
1979
1980void
1981_set_current (SV *current)
1982 PROTOTYPE: $
1983 CODE:
1984 SvREFCNT_dec (SvRV (coro_current));
1985 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1986
1987void
1988_set_readyhook (SV *hook)
1989 PROTOTYPE: $
1990 CODE:
1991 LOCK;
1992 SvREFCNT_dec (coro_readyhook);
1993 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1994 UNLOCK;
1164 1995
1165int 1996int
1166prio (Coro::State coro, int newprio = 0) 1997prio (Coro::State coro, int newprio = 0)
1167 ALIAS: 1998 ALIAS:
1168 nice = 1 1999 nice = 1
… …
1171 RETVAL = coro->prio; 2002 RETVAL = coro->prio;
1172 2003
1173 if (items > 1) 2004 if (items > 1)
1174 { 2005 {
1175 if (ix) 2006 if (ix)
1176 newprio += coro->prio; 2007 newprio = coro->prio - newprio;
1177 2008
1178 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2009 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2010 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180 2011
1181 coro->prio = newprio; 2012 coro->prio = newprio;
1182 } 2013 }
1183} 2014}
2015 OUTPUT:
2016 RETVAL
1184 2017
1185void 2018SV *
1186ready (SV *self) 2019ready (SV *self)
1187 PROTOTYPE: $ 2020 PROTOTYPE: $
1188 CODE: 2021 CODE:
1189 api_ready (self); 2022 RETVAL = boolSV (api_ready (self));
2023 OUTPUT:
2024 RETVAL
1190 2025
1191int 2026int
1192nready (...) 2027nready (...)
1193 PROTOTYPE: 2028 PROTOTYPE:
1194 CODE: 2029 CODE:
1195 RETVAL = coro_nready; 2030 RETVAL = coro_nready;
1196 OUTPUT: 2031 OUTPUT:
1197 RETVAL 2032 RETVAL
1198 2033
2034# for async_pool speedup
2035void
2036_pool_1 (SV *cb)
2037 CODE:
2038{
2039 struct coro *coro = SvSTATE (coro_current);
2040 HV *hv = (HV *)SvRV (coro_current);
2041 AV *defav = GvAV (PL_defgv);
2042 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2043 AV *invoke_av;
2044 int i, len;
2045
2046 if (!invoke)
2047 {
2048 SV *old = PL_diehook;
2049 PL_diehook = 0;
2050 SvREFCNT_dec (old);
2051 croak ("\3async_pool terminate\2\n");
2052 }
2053
2054 SvREFCNT_dec (coro->saved_deffh);
2055 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2056
2057 hv_store (hv, "desc", sizeof ("desc") - 1,
2058 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2059
2060 invoke_av = (AV *)SvRV (invoke);
2061 len = av_len (invoke_av);
2062
2063 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2064
2065 if (len > 0)
2066 {
2067 av_fill (defav, len - 1);
2068 for (i = 0; i < len; ++i)
2069 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2070 }
2071
2072 SvREFCNT_dec (invoke);
2073}
2074
2075void
2076_pool_2 (SV *cb)
2077 CODE:
2078{
2079 struct coro *coro = SvSTATE (coro_current);
2080
2081 sv_setsv (cb, &PL_sv_undef);
2082
2083 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2084 coro->saved_deffh = 0;
2085
2086 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2087 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2088 {
2089 SV *old = PL_diehook;
2090 PL_diehook = 0;
2091 SvREFCNT_dec (old);
2092 croak ("\3async_pool terminate\2\n");
2093 }
2094
2095 av_clear (GvAV (PL_defgv));
2096 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2097 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2098
2099 coro->prio = 0;
2100
2101 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2102 api_trace (coro_current, 0);
2103
2104 av_push (av_async_pool, newSVsv (coro_current));
2105}
2106
2107#if 0
2108
2109void
2110_generator_call (...)
2111 PROTOTYPE: @
2112 PPCODE:
2113 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2114 xxxx
2115 abort ();
2116
2117SV *
2118gensub (SV *sub, ...)
2119 PROTOTYPE: &;@
2120 CODE:
2121{
2122 struct coro *coro;
2123 MAGIC *mg;
2124 CV *xcv;
2125 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2126 int i;
2127
2128 CvGV (ncv) = CvGV (cv);
2129 CvFILE (ncv) = CvFILE (cv);
2130
2131 Newz (0, coro, 1, struct coro);
2132 coro->args = newAV ();
2133 coro->flags = CF_NEW;
2134
2135 av_extend (coro->args, items - 1);
2136 for (i = 1; i < items; i++)
2137 av_push (coro->args, newSVsv (ST (i)));
2138
2139 CvISXSUB_on (ncv);
2140 CvXSUBANY (ncv).any_ptr = (void *)coro;
2141
2142 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2143
2144 CvXSUB (ncv) = CvXSUB (xcv);
2145 CvANON_on (ncv);
2146
2147 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2148 RETVAL = newRV_noinc ((SV *)ncv);
2149}
2150 OUTPUT:
2151 RETVAL
2152
2153#endif
2154
2155
1199MODULE = Coro::State PACKAGE = Coro::AIO 2156MODULE = Coro::State PACKAGE = Coro::AIO
1200 2157
1201SV * 2158SV *
1202_get_state () 2159_get_state ()
1203 CODE: 2160 CODE:
1204{ 2161{
1205 struct { 2162 struct io_state *data;
1206 int errorno;
1207 int laststype;
1208 int laststatval;
1209 Stat_t statcache;
1210 } data;
1211 2163
2164 RETVAL = newSV (sizeof (struct io_state));
2165 data = (struct io_state *)SvPVX (RETVAL);
2166 SvCUR_set (RETVAL, sizeof (struct io_state));
2167 SvPOK_only (RETVAL);
2168
1212 data.errorno = errno; 2169 data->errorno = errno;
1213 data.laststype = PL_laststype; 2170 data->laststype = PL_laststype;
1214 data.laststatval = PL_laststatval; 2171 data->laststatval = PL_laststatval;
1215 data.statcache = PL_statcache; 2172 data->statcache = PL_statcache;
1216
1217 RETVAL = newSVpvn ((char *)&data, sizeof data);
1218} 2173}
1219 OUTPUT: 2174 OUTPUT:
1220 RETVAL 2175 RETVAL
1221 2176
1222void 2177void
1223_set_state (char *data_) 2178_set_state (char *data_)
1224 PROTOTYPE: $ 2179 PROTOTYPE: $
1225 CODE: 2180 CODE:
1226{ 2181{
1227 struct { 2182 struct io_state *data = (void *)data_;
1228 int errorno;
1229 int laststype;
1230 int laststatval;
1231 Stat_t statcache;
1232 } *data = (void *)data_;
1233 2183
1234 errno = data->errorno; 2184 errno = data->errorno;
1235 PL_laststype = data->laststype; 2185 PL_laststype = data->laststype;
1236 PL_laststatval = data->laststatval; 2186 PL_laststatval = data->laststatval;
1237 PL_statcache = data->statcache; 2187 PL_statcache = data->statcache;
1238} 2188}
2189
2190
2191MODULE = Coro::State PACKAGE = Coro::AnyEvent
2192
2193BOOT:
2194 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2195
2196SV *
2197_schedule (...)
2198 PROTOTYPE: @
2199 CODE:
2200{
2201 static int incede;
2202
2203 api_cede_notself ();
2204
2205 ++incede;
2206 while (coro_nready >= incede && api_cede ())
2207 ;
2208
2209 sv_setsv (sv_activity, &PL_sv_undef);
2210 if (coro_nready >= incede)
2211 {
2212 PUSHMARK (SP);
2213 PUTBACK;
2214 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2215 SPAGAIN;
2216 }
2217
2218 --incede;
2219}
2220

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