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Comparing Coro/Coro/State.xs (file contents):
Revision 1.97 by root, Sun Nov 26 21:21:14 2006 UTC vs.
Revision 1.253 by root, Fri Nov 7 20:12:26 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 66# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 67# define PL_ppaddr ppaddr
14# endif 68# endif
15# ifndef call_sv 69# ifndef call_sv
16# define call_sv perl_call_sv 70# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 81# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
29# endif 83# endif
30#endif 84#endif
31 85
32#include <stdio.h> 86/* 5.11 */
33#include <errno.h> 87#ifndef CxHASARGS
88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
89#endif
90
91/* 5.10.0 */
92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
95
96/* 5.8.8 */
97#ifndef GV_NOTQUAL
98# define GV_NOTQUAL 0
99#endif
100#ifndef newSV
101# define newSV(l) NEWSV(0,l)
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
34 108
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD 110# 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 111#endif
53# include <limits.h> 112
54# ifndef PAGESIZE 113#ifndef CORO_STACKGUARD
55# define PAGESIZE pagesize 114# define CORO_STACKGUARD 0
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize;
58# else
59# define BOOT_PAGESIZE
60# endif 115#endif
61#endif
62 116
63/* The next macro should declare a variable stacklevel that contains and approximation 117/* prefer perl internal functions over our own? */
64 * to the current C stack pointer. Its property is that it changes with each call 118#ifndef CORO_PREFER_PERL_FUNCTIONS
65 * and should be unique. */ 119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
66#define dSTACKLEVEL int stacklevel 124#define dSTACKLEVEL volatile char stacklevel
67#define STACKLEVEL ((void *)&stacklevel) 125#define STACKLEVEL ((void *)&stacklevel)
68 126
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
70 128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
133#else
134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
71#include "CoroAPI.h" 144#include "CoroAPI.h"
72 145
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74
75#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
76static perl_mutex coro_mutex; 147static perl_mutex coro_lock;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 149# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
79#else 150#else
80# define LOCK (void)0 151# define LOCK (void)0
81# define UNLOCK (void)0 152# define UNLOCK (void)0
82#endif 153#endif
83 154
155/* helper storage struct for Coro::AIO */
156struct io_state
157{
158 AV *res;
159 int errorno;
160 I32 laststype;
161 int laststatval;
162 Stat_t statcache;
163};
164
165static double (*nvtime)(); /* so why doesn't it take void? */
166
167static size_t coro_stacksize = CORO_STACKSIZE;
84static struct CoroAPI coroapi; 168static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 169static AV *main_mainstack; /* used to differentiate between $main and others */
170static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 171static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 172static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
173
174static GV *irsgv; /* $/ */
175static GV *stdoutgv; /* *STDOUT */
176static SV *rv_diehook;
177static SV *rv_warnhook;
178static HV *hv_sig; /* %SIG */
179
180/* async_pool helper stuff */
181static SV *sv_pool_rss;
182static SV *sv_pool_size;
183static AV *av_async_pool;
184
185/* Coro::AnyEvent */
186static SV *sv_activity;
187
188static struct coro_cctx *cctx_first;
189static int cctx_count, cctx_idle;
190
191enum {
192 CC_MAPPED = 0x01,
193 CC_NOREUSE = 0x02, /* throw this away after tracing */
194 CC_TRACE = 0x04,
195 CC_TRACE_SUB = 0x08, /* trace sub calls */
196 CC_TRACE_LINE = 0x10, /* trace each statement */
197 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
198};
88 199
89/* this is a structure representing a c-level coroutine */ 200/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 201typedef struct coro_cctx {
91 struct coro_stack *next; 202 struct coro_cctx *next;
92 203
93 /* the stack */ 204 /* the stack */
94 void *sptr; 205 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 206 size_t ssize;
96 207
97 /* cpu state */ 208 /* cpu state */
98 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99 JMPENV *top_env; 211 JMPENV *top_env;
100 coro_context cctx; 212 coro_context cctx;
101} coro_stack; 213
214#if CORO_USE_VALGRIND
215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
219
220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct {
229 SV *defsv;
230 AV *defav;
231 SV *errsv;
232 SV *irsgv;
233#define VAR(name,type) type name;
234# include "state.h"
235#undef VAR
236} perl_slots;
237
238#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
102 239
103/* this is a structure representing a perl-level coroutine */ 240/* this is a structure representing a perl-level coroutine */
104struct coro { 241struct coro {
105 /* the c coroutine allocated to this perl coroutine, if any */ 242 /* the c coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 243 coro_cctx *cctx;
107 244
108 /* data associated with this coroutine (initial args) */ 245 /* 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; 246 AV *mainstack;
125 SV **stack_sp; 247 perl_slots *slot; /* basically the saved sp */
126 OP *op; 248
127 SV **curpad; 249 AV *args; /* data associated with this coroutine (initial args) */
128 AV *comppad; 250 int refcnt; /* coroutines are refcounted, yes */
129 CV *compcv; 251 int flags; /* CF_ flags */
130 SV **stack_base; 252 HV *hv; /* the perl hash associated with this coro, if any */
131 SV **stack_max; 253
132 SV **tmps_stack; 254 /* statistics */
133 I32 tmps_floor; 255 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;
150 256
151 /* coro process data */ 257 /* coro process data */
152 int prio; 258 int prio;
259 SV *throw; /* exception to be thrown */
260
261 /* async_pool */
262 SV *saved_deffh;
263
264 /* linked list */
265 struct coro *next, *prev;
153}; 266};
154 267
155typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
157 270
271/** Coro ********************************************************************/
272
273#define PRIO_MAX 3
274#define PRIO_HIGH 1
275#define PRIO_NORMAL 0
276#define PRIO_LOW -1
277#define PRIO_IDLE -3
278#define PRIO_MIN -4
279
280/* for Coro.pm */
281static SV *coro_current;
282static SV *coro_readyhook;
283static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
284static int coro_nready;
285static struct coro *coro_first;
286
287/** lowlevel stuff **********************************************************/
288
289static SV *
290coro_get_sv (pTHX_ const char *name, int create)
291{
292#if PERL_VERSION_ATLEAST (5,10,0)
293 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
294 get_sv (name, create);
295#endif
296 return get_sv (name, create);
297}
298
299static AV *
300coro_get_av (pTHX_ const char *name, int create)
301{
302#if PERL_VERSION_ATLEAST (5,10,0)
303 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
304 get_av (name, create);
305#endif
306 return get_av (name, create);
307}
308
309static HV *
310coro_get_hv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_hv (name, create);
315#endif
316 return get_hv (name, create);
317}
318
158static AV * 319static AV *
159coro_clone_padlist (pTHX_ CV *cv) 320coro_clone_padlist (pTHX_ CV *cv)
160{ 321{
161 AV *padlist = CvPADLIST (cv); 322 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 323 AV *newpadlist, *newpad;
163 324
164 newpadlist = newAV (); 325 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 326 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 327#if PERL_VERSION_ATLEAST (5,10,0)
328 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
329#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 331#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 332 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 333 --AvFILLp (padlist);
173 334
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 335 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad); 336 av_store (newpadlist, 1, (SV *)newpad);
176 337
177 return newpadlist; 338 return newpadlist;
178} 339}
179 340
… …
209 370
210 /* casting is fun. */ 371 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 372 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 373 free_padlist (aTHX_ padlist);
213 374
214 SvREFCNT_dec (av); 375 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 376
216 return 0; 377 return 0;
217} 378}
218 379
219#define PERL_MAGIC_coro PERL_MAGIC_ext 380#define CORO_MAGIC_type_cv PERL_MAGIC_ext
381#define CORO_MAGIC_type_state PERL_MAGIC_ext
220 382
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 383static MGVTBL coro_cv_vtbl = {
384 0, 0, 0, 0,
385 coro_cv_free
386};
387
388#define CORO_MAGIC(sv, type) \
389 SvMAGIC (sv) \
390 ? SvMAGIC (sv)->mg_type == type \
391 ? SvMAGIC (sv) \
392 : mg_find (sv, type) \
393 : 0
394
395#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
396#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
397
398static struct coro *
399SvSTATE_ (pTHX_ SV *coro)
400{
401 HV *stash;
402 MAGIC *mg;
403
404 if (SvROK (coro))
405 coro = SvRV (coro);
406
407 if (expect_false (SvTYPE (coro) != SVt_PVHV))
408 croak ("Coro::State object required");
409
410 stash = SvSTASH (coro);
411 if (expect_false (stash != coro_stash && stash != coro_state_stash))
412 {
413 /* very slow, but rare, check */
414 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
415 croak ("Coro::State object required");
416 }
417
418 mg = CORO_MAGIC_state (coro);
419 return (struct coro *)mg->mg_ptr;
420}
421
422#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
222 423
223/* the next two functions merely cache the padlists */ 424/* the next two functions merely cache the padlists */
224static void 425static void
225get_padlist (pTHX_ CV *cv) 426get_padlist (pTHX_ CV *cv)
226{ 427{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 428 MAGIC *mg = CORO_MAGIC_cv (cv);
429 AV *av;
228 430
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 431 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 432 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 433 else
232 { 434 {
233#if 0 435#if CORO_PREFER_PERL_FUNCTIONS
234 /* this is probably cleaner, but also slower? */ 436 /* this is probably cleaner? but also slower! */
437 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 438 CV *cp = Perl_cv_clone (cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 439 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 440 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 441 SvREFCNT_dec (cp);
239#else 442#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 443 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
243} 446}
244 447
245static void 448static void
246put_padlist (pTHX_ CV *cv) 449put_padlist (pTHX_ CV *cv)
247{ 450{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 451 MAGIC *mg = CORO_MAGIC_cv (cv);
452 AV *av;
249 453
250 if (!mg) 454 if (expect_false (!mg))
251 { 455 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 }
257 456
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 457 av = (AV *)mg->mg_obj;
259}
260 458
261#define SB do { 459 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 460 av_extend (av, AvMAX (av) + 1);
263 461
264#define LOAD(state) load_state(aTHX_ (state)); 462 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 463}
266 464
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 465/** load & save, init *******************************************************/
268 466
269static void 467static void
270load_state(pTHX_ Coro__State c) 468load_perl (pTHX_ Coro__State c)
271{ 469{
272 PL_dowarn = c->dowarn; 470 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 471 c->slot = 0;
274 472
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 473 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;
305 474
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 475 GvSV (PL_defgv) = slot->defsv;
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 476 GvAV (PL_defgv) = slot->defav;
308 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 477 GvSV (PL_errgv) = slot->errsv;
478 GvSV (irsgv) = slot->irsgv;
479
480 #define VAR(name,type) PL_ ## name = slot->name;
481 # include "state.h"
482 #undef VAR
309 483
310 { 484 {
311 dSP; 485 dSP;
486
312 CV *cv; 487 CV *cv;
313 488
314 /* now do the ugly restore mess */ 489 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs)) 490 while (expect_true (cv = (CV *)POPs))
316 { 491 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */ 492 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist; 493 CvDEPTH (cv) = PTR2IV (POPs);
323 } 494 CvPADLIST (cv) = (AV *)POPs;
324
325 ++CvDEPTH(cv);
326 } 495 }
327 496
328 PUTBACK; 497 PUTBACK;
329 } 498 }
330} 499}
331 500
332static void 501static void
333save_state(pTHX_ Coro__State c, int flags) 502save_perl (pTHX_ Coro__State c)
334{ 503{
335 { 504 {
336 dSP; 505 dSP;
337 I32 cxix = cxstack_ix; 506 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack; 507 PERL_CONTEXT *ccstk = cxstack;
… …
341 /* 510 /*
342 * the worst thing you can imagine happens first - we have to save 511 * the worst thing you can imagine happens first - we have to save
343 * (and reinitialize) all cv's in the whole callchain :( 512 * (and reinitialize) all cv's in the whole callchain :(
344 */ 513 */
345 514
346 PUSHs (Nullsv); 515 XPUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */ 516 /* this loop was inspired by pp_caller */
348 for (;;) 517 for (;;)
349 { 518 {
350 while (cxix >= 0) 519 while (expect_true (cxix >= 0))
351 { 520 {
352 PERL_CONTEXT *cx = &ccstk[cxix--]; 521 PERL_CONTEXT *cx = &ccstk[cxix--];
353 522
354 if (CxTYPE(cx) == CXt_SUB) 523 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355 { 524 {
356 CV *cv = cx->blk_sub.cv; 525 CV *cv = cx->blk_sub.cv;
526
357 if (CvDEPTH(cv)) 527 if (expect_true (CvDEPTH (cv)))
358 { 528 {
359 EXTEND (SP, CvDEPTH(cv)*2); 529 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)); 530 PUSHs ((SV *)CvPADLIST (cv));
531 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
369 PUSHs ((SV *)cv); 532 PUSHs ((SV *)cv);
370 533
534 CvDEPTH (cv) = 0;
371 get_padlist (aTHX_ cv); 535 get_padlist (aTHX_ cv);
372 } 536 }
373 } 537 }
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 } 538 }
383 539
384 if (top_si->si_type == PERLSI_MAIN) 540 if (expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 541 break;
386 542
387 top_si = top_si->si_prev; 543 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 544 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 545 cxix = top_si->si_cxix;
390 } 546 }
391 547
392 PUTBACK; 548 PUTBACK;
393 } 549 }
394 550
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 551 /* allocate some space on the context stack for our purposes */
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 552 /* we manually unroll here, as usually 2 slots is enough */
397 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 553 if (SLOT_COUNT >= 1) CXINC;
554 if (SLOT_COUNT >= 2) CXINC;
555 if (SLOT_COUNT >= 3) CXINC;
556 {
557 int i;
558 for (i = 3; i < SLOT_COUNT; ++i)
559 CXINC;
560 }
561 cxstack_ix -= SLOT_COUNT; /* undo allocation */
398 562
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; 563 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp; 564
406 c->op = PL_op; 565 {
407 c->curpad = PL_curpad; 566 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408 c->comppad = PL_comppad; 567
409 c->compcv = PL_compcv; 568 slot->defav = GvAV (PL_defgv);
410 c->stack_base = PL_stack_base; 569 slot->defsv = DEFSV;
411 c->stack_max = PL_stack_max; 570 slot->errsv = ERRSV;
412 c->tmps_stack = PL_tmps_stack; 571 slot->irsgv = GvSV (irsgv);
413 c->tmps_floor = PL_tmps_floor; 572
414 c->tmps_ix = PL_tmps_ix; 573 #define VAR(name,type) slot->name = PL_ ## name;
415 c->tmps_max = PL_tmps_max; 574 # include "state.h"
416 c->markstack = PL_markstack; 575 #undef VAR
417 c->markstack_ptr = PL_markstack_ptr; 576 }
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} 577}
433 578
434/* 579/*
435 * allocate various perl stacks. This is an exact copy 580 * allocate various perl stacks. This is an exact copy
436 * of perl.c:init_stacks, except that it uses less memory 581 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do 582 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace. 583 * not usually need a lot of stackspace.
439 */ 584 */
585#if CORO_PREFER_PERL_FUNCTIONS
586# define coro_init_stacks init_stacks
587#else
440static void 588static void
441coro_init_stacks (pTHX) 589coro_init_stacks (pTHX)
442{ 590{
443 LOCK; 591 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; 592 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 593 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 594 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 595
450 PL_stack_base = AvARRAY(PL_curstack); 596 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 597 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 598 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 599
454 New(50,PL_tmps_stack,96,SV*); 600 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 601 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 602 PL_tmps_ix = -1;
457 PL_tmps_max = 96; 603 PL_tmps_max = 32;
458 604
459 New(54,PL_markstack,16,I32); 605 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 606 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16; 607 PL_markstack_max = PL_markstack + 16;
462 608
463#ifdef SET_MARK_OFFSET 609#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 610 SET_MARK_OFFSET;
465#endif 611#endif
466 612
467 New(54,PL_scopestack,16,I32); 613 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 614 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16; 615 PL_scopestack_max = 8;
470 616
471 New(54,PL_savestack,96,ANY); 617 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 618 PL_savestack_ix = 0;
473 PL_savestack_max = 96; 619 PL_savestack_max = 24;
474 620
475#if PERL_VERSION < 9 621#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,8,OP*); 622 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 623 PL_retstack_ix = 0;
478 PL_retstack_max = 8; 624 PL_retstack_max = 4;
479#endif 625#endif
480
481 UNLOCK;
482} 626}
627#endif
483 628
484/* 629/*
485 * destroy the stacks, the callchain etc... 630 * destroy the stacks, the callchain etc...
486 */ 631 */
487static void 632static void
488destroy_stacks(pTHX) 633coro_destruct_stacks (pTHX)
489{ 634{
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) 635 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 636 PL_curstackinfo = PL_curstackinfo->si_next;
503 637
504 while (PL_curstackinfo) 638 while (PL_curstackinfo)
505 { 639 {
506 PERL_SI *p = PL_curstackinfo->si_prev; 640 PERL_SI *p = PL_curstackinfo->si_prev;
507 641
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT) 642 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack); 643 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519 644
520 Safefree (PL_curstackinfo->si_cxstack); 645 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo); 646 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p; 647 PL_curstackinfo = p;
523 } 648 }
524 649
525 Safefree (PL_tmps_stack); 650 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 651 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 652 Safefree (PL_scopestack);
528 Safefree (PL_savestack); 653 Safefree (PL_savestack);
529#if PERL_VERSION < 9 654#if !PERL_VERSION_ATLEAST (5,10,0)
530 Safefree (PL_retstack); 655 Safefree (PL_retstack);
531#endif 656#endif
532} 657}
533 658
659static size_t
660coro_rss (pTHX_ struct coro *coro)
661{
662 size_t rss = sizeof (*coro);
663
664 if (coro->mainstack)
665 {
666 perl_slots tmp_slot;
667 perl_slots *slot;
668
669 if (coro->flags & CF_RUNNING)
670 {
671 slot = &tmp_slot;
672
673 #define VAR(name,type) slot->name = PL_ ## name;
674 # include "state.h"
675 #undef VAR
676 }
677 else
678 slot = coro->slot;
679
680 if (slot)
681 {
682 rss += sizeof (slot->curstackinfo);
683 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
684 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
685 rss += slot->tmps_max * sizeof (SV *);
686 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
687 rss += slot->scopestack_max * sizeof (I32);
688 rss += slot->savestack_max * sizeof (ANY);
689
690#if !PERL_VERSION_ATLEAST (5,10,0)
691 rss += slot->retstack_max * sizeof (OP *);
692#endif
693 }
694 }
695
696 return rss;
697}
698
699/** coroutine stack handling ************************************************/
700
701static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
702static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
703static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
704
705/* apparently < 5.8.8 */
706#ifndef MgPV_nolen_const
707#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
708 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
709 (const char*)(mg)->mg_ptr)
710#endif
711
712/*
713 * This overrides the default magic get method of %SIG elements.
714 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
715 * and instead of tryign to save and restore the hash elements, we just provide
716 * readback here.
717 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
718 * not expecting this to actually change the hook. This is a potential problem
719 * when a schedule happens then, but we ignore this.
720 */
721static int
722coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
723{
724 const char *s = MgPV_nolen_const (mg);
725
726 if (*s == '_')
727 {
728 SV **svp = 0;
729
730 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
731 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
732
733 if (svp)
734 {
735 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
736 return 0;
737 }
738 }
739
740 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
741}
742
743static int
744coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 SV *old = *svp;
758 *svp = 0;
759 SvREFCNT_dec (old);
760 return 0;
761 }
762 }
763
764 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
765}
766
767static int
768coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771
772 if (*s == '_')
773 {
774 SV **svp = 0;
775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 SV *old = *svp;
782 *svp = newSVsv (sv);
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
789}
790
534static void 791static void
535setup_coro (struct coro *coro) 792coro_setup (pTHX_ struct coro *coro)
536{ 793{
537 /* 794 /*
538 * emulate part of the perl startup here. 795 * emulate part of the perl startup here.
539 */ 796 */
540 dTHX; 797 coro_init_stacks (aTHX);
798
799 PL_runops = RUNOPS_DEFAULT;
800 PL_curcop = &PL_compiling;
801 PL_in_eval = EVAL_NULL;
802 PL_comppad = 0;
803 PL_curpm = 0;
804 PL_curpad = 0;
805 PL_localizing = 0;
806 PL_dirty = 0;
807 PL_restartop = 0;
808#if PERL_VERSION_ATLEAST (5,10,0)
809 PL_parser = 0;
810#endif
811
812 /* recreate the die/warn hooks */
813 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
814 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
815
816 GvSV (PL_defgv) = newSV (0);
817 GvAV (PL_defgv) = coro->args; coro->args = 0;
818 GvSV (PL_errgv) = newSV (0);
819 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
820 PL_rs = newSVsv (GvSV (irsgv));
821 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
822
823 {
824 dSP;
825 LOGOP myop;
826
827 Zero (&myop, 1, LOGOP);
828 myop.op_next = Nullop;
829 myop.op_flags = OPf_WANT_VOID;
830
831 PUSHMARK (SP);
832 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
833 PUTBACK;
834 PL_op = (OP *)&myop;
835 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
836 SPAGAIN;
837 }
838
839 /* this newly created coroutine might be run on an existing cctx which most
840 * likely was suspended in set_stacklevel, called from entersub.
841 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
842 * so we ENTER here for symmetry
843 */
844 ENTER;
845}
846
847static void
848coro_destruct (pTHX_ struct coro *coro)
849{
850 if (!IN_DESTRUCT)
851 {
852 /* restore all saved variables and stuff */
853 LEAVE_SCOPE (0);
854 assert (PL_tmps_floor == -1);
855
856 /* free all temporaries */
857 FREETMPS;
858 assert (PL_tmps_ix == -1);
859
860 /* unwind all extra stacks */
861 POPSTACK_TO (PL_mainstack);
862
863 /* unwind main stack */
864 dounwind (-1);
865 }
866
867 SvREFCNT_dec (GvSV (PL_defgv));
868 SvREFCNT_dec (GvAV (PL_defgv));
869 SvREFCNT_dec (GvSV (PL_errgv));
870 SvREFCNT_dec (PL_defoutgv);
871 SvREFCNT_dec (PL_rs);
872 SvREFCNT_dec (GvSV (irsgv));
873
874 SvREFCNT_dec (PL_diehook);
875 SvREFCNT_dec (PL_warnhook);
876
877 SvREFCNT_dec (coro->saved_deffh);
878 SvREFCNT_dec (coro->throw);
879
880 coro_destruct_stacks (aTHX);
881}
882
883static void
884free_coro_mortal (pTHX)
885{
886 if (expect_true (coro_mortal))
887 {
888 SvREFCNT_dec (coro_mortal);
889 coro_mortal = 0;
890 }
891}
892
893static int
894runops_trace (pTHX)
895{
896 COP *oldcop = 0;
897 int oldcxix = -2;
898 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
899 coro_cctx *cctx = coro->cctx;
900
901 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
902 {
903 PERL_ASYNC_CHECK ();
904
905 if (cctx->flags & CC_TRACE_ALL)
906 {
907 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
908 {
909 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
910 SV **bot, **top;
911 AV *av = newAV (); /* return values */
912 SV **cb;
913 dSP;
914
915 GV *gv = CvGV (cx->blk_sub.cv);
916 SV *fullname = sv_2mortal (newSV (0));
917 if (isGV (gv))
918 gv_efullname3 (fullname, gv, 0);
919
920 bot = PL_stack_base + cx->blk_oldsp + 1;
921 top = cx->blk_gimme == G_ARRAY ? SP + 1
922 : cx->blk_gimme == G_SCALAR ? bot + 1
923 : bot;
924
925 av_extend (av, top - bot);
926 while (bot < top)
927 av_push (av, SvREFCNT_inc_NN (*bot++));
928
929 PL_runops = RUNOPS_DEFAULT;
930 ENTER;
931 SAVETMPS;
932 EXTEND (SP, 3);
933 PUSHMARK (SP);
934 PUSHs (&PL_sv_no);
935 PUSHs (fullname);
936 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
937 PUTBACK;
938 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
939 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
940 SPAGAIN;
941 FREETMPS;
942 LEAVE;
943 PL_runops = runops_trace;
944 }
945
946 if (oldcop != PL_curcop)
947 {
948 oldcop = PL_curcop;
949
950 if (PL_curcop != &PL_compiling)
951 {
952 SV **cb;
953
954 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
955 {
956 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
957
958 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
959 {
960 runops_proc_t old_runops = PL_runops;
961 dSP;
962 GV *gv = CvGV (cx->blk_sub.cv);
963 SV *fullname = sv_2mortal (newSV (0));
964
965 if (isGV (gv))
966 gv_efullname3 (fullname, gv, 0);
967
968 PL_runops = RUNOPS_DEFAULT;
969 ENTER;
970 SAVETMPS;
971 EXTEND (SP, 3);
972 PUSHMARK (SP);
973 PUSHs (&PL_sv_yes);
974 PUSHs (fullname);
975 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
976 PUTBACK;
977 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
978 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
979 SPAGAIN;
980 FREETMPS;
981 LEAVE;
982 PL_runops = runops_trace;
983 }
984
985 oldcxix = cxstack_ix;
986 }
987
988 if (cctx->flags & CC_TRACE_LINE)
989 {
990 dSP;
991
992 PL_runops = RUNOPS_DEFAULT;
993 ENTER;
994 SAVETMPS;
995 EXTEND (SP, 3);
996 PL_runops = RUNOPS_DEFAULT;
997 PUSHMARK (SP);
998 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
999 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1000 PUTBACK;
1001 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1002 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1003 SPAGAIN;
1004 FREETMPS;
1005 LEAVE;
1006 PL_runops = runops_trace;
1007 }
1008 }
1009 }
1010 }
1011 }
1012
1013 TAINT_NOT;
1014 return 0;
1015}
1016
1017/* inject a fake call to Coro::State::_cctx_init into the execution */
1018/* _cctx_init should be careful, as it could be called at almost any time */
1019/* during execution of a perl program */
1020static void NOINLINE
1021cctx_prepare (pTHX_ coro_cctx *cctx)
1022{
541 dSP; 1023 dSP;
542 UNOP myop; 1024 LOGOP myop;
543 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544 1025
545 coro_init_stacks (aTHX); 1026 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 1027
551 SPAGAIN; 1028 if (cctx->flags & CC_TRACE)
1029 PL_runops = runops_trace;
552 1030
553 Zero (&myop, 1, UNOP); 1031 Zero (&myop, 1, LOGOP);
554 myop.op_next = Nullop; 1032 myop.op_next = PL_op;
555 myop.op_flags = OPf_WANT_VOID; 1033 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556 1034
1035 PUSHMARK (SP);
1036 EXTEND (SP, 2);
1037 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1038 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1039 PUTBACK;
557 PL_op = (OP *)&myop; 1040 PL_op = (OP *)&myop;
558
559 PUSHMARK(SP);
560 XPUSHs (sub_init);
561 PUTBACK;
562 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1041 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563 SPAGAIN; 1042 SPAGAIN;
564
565 ENTER; /* necessary e.g. for dounwind */
566} 1043}
567 1044
1045/*
1046 * this is a _very_ stripped down perl interpreter ;)
1047 */
568static void 1048static void
569free_coro_mortal () 1049cctx_run (void *arg)
570{ 1050{
571 if (coro_mortal)
572 {
573 dTHX; 1051 dTHX;
574 1052
575 SvREFCNT_dec (coro_mortal); 1053 /* cctx_run is the alternative tail of transfer(), so unlock here. */
576 coro_mortal = 0; 1054 UNLOCK;
1055
1056 /* we now skip the entersub that lead to transfer() */
1057 PL_op = PL_op->op_next;
1058
1059 /* inject a fake subroutine call to cctx_init */
1060 cctx_prepare (aTHX_ (coro_cctx *)arg);
1061
1062 /* somebody or something will hit me for both perl_run and PL_restartop */
1063 PL_restartop = PL_op;
1064 perl_run (PL_curinterp);
1065
1066 /*
1067 * If perl-run returns we assume exit() was being called or the coro
1068 * fell off the end, which seems to be the only valid (non-bug)
1069 * reason for perl_run to return. We try to exit by jumping to the
1070 * bootstrap-time "top" top_env, as we cannot restore the "main"
1071 * coroutine as Coro has no such concept
1072 */
1073 PL_top_env = main_top_env;
1074 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1075}
1076
1077static coro_cctx *
1078cctx_new ()
1079{
1080 coro_cctx *cctx;
1081 void *stack_start;
1082 size_t stack_size;
1083
1084 ++cctx_count;
1085 Newz (0, cctx, 1, coro_cctx);
1086
1087#if HAVE_MMAP
1088 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1089 /* mmap supposedly does allocate-on-write for us */
1090 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1091
1092 if (cctx->sptr != (void *)-1)
577 } 1093 {
1094# if CORO_STACKGUARD
1095 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1096# endif
1097 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1098 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1099 cctx->flags |= CC_MAPPED;
1100 }
1101 else
1102#endif
1103 {
1104 cctx->ssize = coro_stacksize * (long)sizeof (long);
1105 New (0, cctx->sptr, coro_stacksize, long);
1106
1107 if (!cctx->sptr)
1108 {
1109 perror ("FATAL: unable to allocate stack for coroutine");
1110 _exit (EXIT_FAILURE);
1111 }
1112
1113 stack_start = cctx->sptr;
1114 stack_size = cctx->ssize;
1115 }
1116
1117 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1118 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1119
1120 return cctx;
578} 1121}
579 1122
580static void 1123static void
581coro_run (void *arg) 1124cctx_destroy (coro_cctx *cctx)
582{ 1125{
583 /* 1126 if (!cctx)
584 * this is a _very_ stripped down perl interpreter ;) 1127 return;
585 */
586 dTHX;
587 int ret;
588 1128
589 UNLOCK; 1129 --cctx_count;
1130 coro_destroy (&cctx->cctx);
590 1131
591 PL_top_env = &PL_start_env; 1132 /* coro_transfer creates new, empty cctx's */
592 1133 if (cctx->sptr)
593 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1134 {
594 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op)); 1135#if CORO_USE_VALGRIND
595 1136 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
596 /* continue at cctx_init, without entersub */ 1137#endif
597 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
598
599 /* somebody will hit me for both perl_run and PL_restartop */
600 ret = perl_run (aTHX_ PERL_GET_CONTEXT);
601 printf ("ret %d\n", ret);//D
602
603 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
604 abort ();
605}
606
607static coro_stack *
608stack_new ()
609{
610 coro_stack *stack;
611
612 New (0, stack, 1, coro_stack);
613 1138
614#if HAVE_MMAP 1139#if HAVE_MMAP
615 1140 if (cctx->flags & CC_MAPPED)
616 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1141 munmap (cctx->sptr, cctx->ssize);
617 /* mmap suppsedly does allocate-on-write for us */ 1142 else
618 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
619
620 if (stack->sptr == (void *)-1)
621 {
622 perror ("FATAL: unable to mmap stack for coroutine");
623 _exit (EXIT_FAILURE);
624 }
625
626# if STACKGUARD
627 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
628# endif 1143#endif
629 1144 Safefree (cctx->sptr);
630#else
631
632 stack->ssize = STACKSIZE * (long)sizeof (long);
633 New (0, stack->sptr, STACKSIZE, long);
634
635 if (!stack->sptr)
636 { 1145 }
637 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1146
638 _exit (EXIT_FAILURE); 1147 Safefree (cctx);
1148}
1149
1150/* wether this cctx should be destructed */
1151#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1152
1153static coro_cctx *
1154cctx_get (pTHX)
1155{
1156 while (expect_true (cctx_first))
639 } 1157 {
1158 coro_cctx *cctx = cctx_first;
1159 cctx_first = cctx->next;
1160 --cctx_idle;
640 1161
641#endif 1162 if (expect_true (!CCTX_EXPIRED (cctx)))
1163 return cctx;
642 1164
643 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1165 cctx_destroy (cctx);
1166 }
644 1167
645 return stack; 1168 return cctx_new ();
646} 1169}
647 1170
648static void 1171static void
649stack_free (coro_stack *stack) 1172cctx_put (coro_cctx *cctx)
650{ 1173{
651 if (!stack) 1174 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
652 return;
653 1175
654#if HAVE_MMAP 1176 /* free another cctx if overlimit */
655 munmap (stack->sptr, stack->ssize); 1177 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
656#else
657 Safefree (stack->sptr);
658#endif
659
660 Safefree (stack);
661}
662
663static coro_stack *stack_first;
664
665static coro_stack *
666stack_get ()
667{
668 coro_stack *stack;
669
670 if (stack_first)
671 {
672 stack = stack_first;
673 stack_first = stack->next;
674 }
675 else
676 { 1178 {
677 stack = stack_new (); 1179 coro_cctx *first = cctx_first;
678 PL_op = PL_op->op_next; 1180 cctx_first = first->next;
1181 --cctx_idle;
1182
1183 cctx_destroy (first);
679 } 1184 }
680 1185
681 return stack; 1186 ++cctx_idle;
1187 cctx->next = cctx_first;
1188 cctx_first = cctx;
682} 1189}
1190
1191/** coroutine switching *****************************************************/
683 1192
684static void 1193static void
685stack_put (coro_stack *stack) 1194transfer_check (pTHX_ struct coro *prev, struct coro *next)
686{ 1195{
687 stack->next = stack_first; 1196 if (expect_true (prev != next))
688 stack_first = stack; 1197 {
689} 1198 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1199 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
690 1200
691/* never call directly, always through the coro_state_transfer global variable */ 1201 if (expect_false (next->flags & CF_RUNNING))
692static void 1202 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1203
1204 if (expect_false (next->flags & CF_DESTROYED))
1205 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1206
1207#if !PERL_VERSION_ATLEAST (5,10,0)
1208 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1209 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1210#endif
1211 }
1212}
1213
1214/* always use the TRANSFER macro */
1215static void NOINLINE
693transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1216transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
694{ 1217{
695 dSTACKLEVEL; 1218 dSTACKLEVEL;
696 1219
697 /* sometimes transfer is only called to set idle_sp */ 1220 /* sometimes transfer is only called to set idle_sp */
698 if (flags == TRANSFER_SET_STACKLEVEL) 1221 if (expect_false (!next))
1222 {
699 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1223 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
700 else if (prev != next) 1224 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
701 { 1225 }
1226 else if (expect_true (prev != next))
1227 {
1228 static volatile int has_throw;
702 coro_stack *prev__stack; 1229 coro_cctx *prev__cctx;
1230
1231 if (expect_false (prev->flags & CF_NEW))
1232 {
1233 /* create a new empty/source context */
1234 ++cctx_count;
1235 New (0, prev->cctx, 1, coro_cctx);
1236 prev->cctx->sptr = 0;
1237 coro_create (&prev->cctx->cctx, 0, 0, 0, 0);
1238
1239 prev->flags &= ~CF_NEW;
1240 prev->flags |= CF_RUNNING;
1241 }
1242
1243 prev->flags &= ~CF_RUNNING;
1244 next->flags |= CF_RUNNING;
703 1245
704 LOCK; 1246 LOCK;
705 1247
706 if (next->mainstack) 1248 /* first get rid of the old state */
1249 save_perl (aTHX_ prev);
1250
1251 if (expect_false (next->flags & CF_NEW))
707 { 1252 {
708 /* coroutine already started */ 1253 /* need to start coroutine */
709 SAVE (prev, flags); 1254 next->flags &= ~CF_NEW;
710 LOAD (next); 1255 /* setup coroutine call */
1256 coro_setup (aTHX_ next);
711 } 1257 }
712 else 1258 else
1259 load_perl (aTHX_ next);
1260
1261 prev__cctx = prev->cctx;
1262
1263 /* possibly "free" the cctx */
1264 if (expect_true (
1265 prev__cctx->idle_sp == STACKLEVEL
1266 && !(prev__cctx->flags & CC_TRACE)
1267 && !force_cctx
1268 ))
713 { 1269 {
714 /* need to start coroutine */ 1270 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
715 /* first get rid of the old state */ 1271 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
716 SAVE (prev, -1); 1272
717 /* setup coroutine call */ 1273 prev->cctx = 0;
718 setup_coro (next); 1274
719 /* need a stack */ 1275 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
720 next->stack = 0; 1276 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1277 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1278 if (!next->cctx)
1279 next->cctx = cctx_get (aTHX);
1280
1281 cctx_put (prev__cctx);
721 } 1282 }
722 1283
723 if (!prev->stack) 1284 ++next->usecount;
724 /* create a new empty context */
725 Newz (0, prev->stack, 1, coro_stack);
726 1285
727 prev__stack = prev->stack; 1286 if (expect_true (!next->cctx))
1287 next->cctx = cctx_get (aTHX);
728 1288
729 /* possibly "free" the stack */ 1289 has_throw = !!next->throw;
730 if (prev__stack->idle_sp == STACKLEVEL) 1290
1291 if (expect_false (prev__cctx != next->cctx))
731 { 1292 {
732 stack_put (prev__stack); 1293 prev__cctx->top_env = PL_top_env;
733 prev->stack = 0; 1294 PL_top_env = next->cctx->top_env;
1295 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
734 } 1296 }
735 1297
736 if (!next->stack) 1298 free_coro_mortal (aTHX);
737 next->stack = stack_get (); 1299 UNLOCK;
738 1300
739 if (prev__stack != next->stack) 1301 if (expect_false (has_throw))
740 { 1302 {
741 prev__stack->top_env = PL_top_env; 1303 struct coro *coro = SvSTATE (coro_current);
742 PL_top_env = next->stack->top_env; 1304
743 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1305 if (coro->throw)
1306 {
1307 SV *exception = coro->throw;
1308 coro->throw = 0;
1309 sv_setsv (ERRSV, exception);
1310 croak (0);
1311 }
744 } 1312 }
1313 }
1314}
745 1315
746 free_coro_mortal (); 1316struct transfer_args
1317{
1318 struct coro *prev, *next;
1319};
747 1320
1321#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1322#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1323
1324/** high level stuff ********************************************************/
1325
1326static int
1327coro_state_destroy (pTHX_ struct coro *coro)
1328{
1329 if (coro->flags & CF_DESTROYED)
1330 return 0;
1331
1332 coro->flags |= CF_DESTROYED;
1333
1334 if (coro->flags & CF_READY)
1335 {
1336 /* reduce nready, as destroying a ready coro effectively unreadies it */
1337 /* alternative: look through all ready queues and remove the coro */
1338 LOCK;
1339 --coro_nready;
748 UNLOCK; 1340 UNLOCK;
749 } 1341 }
750} 1342 else
751 1343 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
752/* use this function pointer to call the above function */
753/* this is done to increase chances of the compiler not inlining the call */
754/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
755void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
756
757struct transfer_args
758{
759 struct coro *prev, *next;
760 int flags;
761};
762
763#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
764
765static void
766coro_state_destroy (struct coro *coro)
767{
768 if (coro->refcnt--)
769 return;
770 1344
771 if (coro->mainstack && coro->mainstack != main_mainstack) 1345 if (coro->mainstack && coro->mainstack != main_mainstack)
772 { 1346 {
773 struct coro temp; 1347 struct coro temp;
774 1348
775 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1349 if (coro->flags & CF_RUNNING)
1350 croak ("FATAL: tried to destroy currently running coroutine");
1351
1352 save_perl (aTHX_ &temp);
776 LOAD (aTHX_ coro); 1353 load_perl (aTHX_ coro);
777 1354
778 destroy_stacks (aTHX); 1355 coro_destruct (aTHX_ coro);
779 1356
780 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1357 load_perl (aTHX_ &temp);
781 1358
782 coro->mainstack = 0; 1359 coro->slot = 0;
783 } 1360 }
784 1361
785 stack_free (coro->stack); 1362 cctx_destroy (coro->cctx);
786 SvREFCNT_dec (coro->args); 1363 SvREFCNT_dec (coro->args);
787 Safefree (coro); 1364
1365 if (coro->next) coro->next->prev = coro->prev;
1366 if (coro->prev) coro->prev->next = coro->next;
1367 if (coro == coro_first) coro_first = coro->next;
1368
1369 return 1;
788} 1370}
789 1371
790static int 1372static int
791coro_state_clear (SV *sv, MAGIC *mg) 1373coro_state_free (pTHX_ SV *sv, MAGIC *mg)
792{ 1374{
793 struct coro *coro = (struct coro *)mg->mg_ptr; 1375 struct coro *coro = (struct coro *)mg->mg_ptr;
794 mg->mg_ptr = 0; 1376 mg->mg_ptr = 0;
795 1377
1378 coro->hv = 0;
1379
1380 if (--coro->refcnt < 0)
1381 {
796 coro_state_destroy (coro); 1382 coro_state_destroy (aTHX_ coro);
1383 Safefree (coro);
1384 }
797 1385
798 return 0; 1386 return 0;
799} 1387}
800 1388
801static int 1389static int
802coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1390coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
803{ 1391{
804 struct coro *coro = (struct coro *)mg->mg_ptr; 1392 struct coro *coro = (struct coro *)mg->mg_ptr;
805 1393
806 ++coro->refcnt; 1394 ++coro->refcnt;
807 1395
808 return 0; 1396 return 0;
809} 1397}
810 1398
811static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1399static MGVTBL coro_state_vtbl = {
812 1400 0, 0, 0, 0,
813static struct coro * 1401 coro_state_free,
814SvSTATE (SV *coro) 1402 0,
815{ 1403#ifdef MGf_DUP
816 HV *stash; 1404 coro_state_dup,
817 MAGIC *mg; 1405#else
818 1406# define MGf_DUP 0
819 if (SvROK (coro)) 1407#endif
820 coro = SvRV (coro); 1408};
821
822 stash = SvSTASH (coro);
823 if (stash != coro_stash && stash != coro_state_stash)
824 {
825 /* very slow, but rare, check */
826 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
827 croak ("Coro::State object required");
828 }
829
830 mg = SvMAGIC (coro);
831 assert (mg->mg_type == PERL_MAGIC_ext);
832 return (struct coro *)mg->mg_ptr;
833}
834 1409
835static void 1410static void
836prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags) 1411prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
837{ 1412{
838 ta->prev = SvSTATE (prev); 1413 ta->prev = SvSTATE (prev_sv);
839 ta->next = SvSTATE (next); 1414 ta->next = SvSTATE (next_sv);
840 ta->flags = flags; 1415 TRANSFER_CHECK (*ta);
841} 1416}
842 1417
843static void 1418static void
844api_transfer (SV *prev, SV *next, int flags) 1419api_transfer (SV *prev_sv, SV *next_sv)
845{ 1420{
846 dTHX; 1421 dTHX;
847 struct transfer_args ta; 1422 struct transfer_args ta;
848 1423
849 prepare_transfer (aTHX_ &ta, prev, next, flags); 1424 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
850 TRANSFER (ta); 1425 TRANSFER (ta, 1);
851} 1426}
852 1427
853/** Coro ********************************************************************/ 1428/** Coro ********************************************************************/
854 1429
855#define PRIO_MAX 3
856#define PRIO_HIGH 1
857#define PRIO_NORMAL 0
858#define PRIO_LOW -1
859#define PRIO_IDLE -3
860#define PRIO_MIN -4
861
862/* for Coro.pm */
863static GV *coro_current, *coro_idle;
864static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
865static int coro_nready;
866
867static void 1430static void
868coro_enq (pTHX_ SV *sv) 1431coro_enq (pTHX_ SV *coro_sv)
1432{
1433 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1434}
1435
1436static SV *
1437coro_deq (pTHX)
869{ 1438{
870 int prio; 1439 int prio;
871 1440
872 if (SvTYPE (sv) != SVt_PVHV)
873 croak ("Coro::ready tried to enqueue something that is not a coroutine");
874
875 prio = SvSTATE (sv)->prio;
876
877 av_push (coro_ready [prio - PRIO_MIN], sv);
878 coro_nready++;
879}
880
881static SV *
882coro_deq (pTHX_ int min_prio)
883{
884 int prio = PRIO_MAX - PRIO_MIN;
885
886 min_prio -= PRIO_MIN;
887 if (min_prio < 0)
888 min_prio = 0;
889
890 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1441 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
891 if (AvFILLp (coro_ready [prio]) >= 0) 1442 if (AvFILLp (coro_ready [prio]) >= 0)
892 {
893 coro_nready--;
894 return av_shift (coro_ready [prio]); 1443 return av_shift (coro_ready [prio]);
895 }
896 1444
897 return 0; 1445 return 0;
898} 1446}
899 1447
1448static int
1449api_ready (SV *coro_sv)
1450{
1451 dTHX;
1452 struct coro *coro;
1453 SV *sv_hook;
1454 void (*xs_hook)(void);
1455
1456 if (SvROK (coro_sv))
1457 coro_sv = SvRV (coro_sv);
1458
1459 coro = SvSTATE (coro_sv);
1460
1461 if (coro->flags & CF_READY)
1462 return 0;
1463
1464 coro->flags |= CF_READY;
1465
1466 LOCK;
1467
1468 sv_hook = coro_nready ? 0 : coro_readyhook;
1469 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1470
1471 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1472 ++coro_nready;
1473
1474 UNLOCK;
1475
1476 if (sv_hook)
1477 {
1478 dSP;
1479
1480 ENTER;
1481 SAVETMPS;
1482
1483 PUSHMARK (SP);
1484 PUTBACK;
1485 call_sv (sv_hook, G_DISCARD);
1486 SPAGAIN;
1487
1488 FREETMPS;
1489 LEAVE;
1490 }
1491
1492 if (xs_hook)
1493 xs_hook ();
1494
1495 return 1;
1496}
1497
1498static int
1499api_is_ready (SV *coro_sv)
1500{
1501 dTHX;
1502 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1503}
1504
900static void 1505static void
901api_ready (SV *coro) 1506prepare_schedule (pTHX_ struct transfer_args *ta)
902{ 1507{
903 dTHX; 1508 SV *prev_sv, *next_sv;
904 1509
905 if (SvROK (coro)) 1510 for (;;)
906 coro = SvRV (coro); 1511 {
1512 LOCK;
1513 next_sv = coro_deq (aTHX);
1514
1515 /* nothing to schedule: call the idle handler */
1516 if (expect_false (!next_sv))
1517 {
1518 dSP;
1519 UNLOCK;
1520
1521 ENTER;
1522 SAVETMPS;
1523
1524 PUSHMARK (SP);
1525 PUTBACK;
1526 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1527 SPAGAIN;
1528
1529 FREETMPS;
1530 LEAVE;
1531 continue;
1532 }
1533
1534 ta->next = SvSTATE (next_sv);
1535
1536 /* cannot transfer to destroyed coros, skip and look for next */
1537 if (expect_false (ta->next->flags & CF_DESTROYED))
1538 {
1539 UNLOCK;
1540 SvREFCNT_dec (next_sv);
1541 /* coro_nready is already taken care of by destroy */
1542 continue;
1543 }
1544
1545 --coro_nready;
1546 UNLOCK;
1547 break;
1548 }
1549
1550 /* free this only after the transfer */
1551 prev_sv = SvRV (coro_current);
1552 ta->prev = SvSTATE (prev_sv);
1553 TRANSFER_CHECK (*ta);
1554 assert (ta->next->flags & CF_READY);
1555 ta->next->flags &= ~CF_READY;
1556 SvRV_set (coro_current, next_sv);
907 1557
908 LOCK; 1558 LOCK;
909 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1559 free_coro_mortal (aTHX);
1560 coro_mortal = prev_sv;
910 UNLOCK; 1561 UNLOCK;
911} 1562}
912 1563
913static void 1564static void
914prepare_schedule (aTHX_ struct transfer_args *ta)
915{
916 SV *current, *prev, *next;
917
918 LOCK;
919
920 current = GvSV (coro_current);
921
922 for (;;)
923 {
924 LOCK;
925
926 next = coro_deq (aTHX_ PRIO_MIN);
927
928 if (next)
929 break;
930
931 UNLOCK;
932
933 {
934 dSP;
935
936 ENTER;
937 SAVETMPS;
938
939 PUSHMARK (SP);
940 PUTBACK;
941 call_sv (GvSV (coro_idle), G_DISCARD);
942
943 FREETMPS;
944 LEAVE;
945 }
946 }
947
948 prev = SvRV (current);
949 SvRV (current) = next;
950
951 /* free this only after the transfer */
952 free_coro_mortal ();
953 coro_mortal = prev;
954
955 ta->prev = SvSTATE (prev);
956 ta->next = SvSTATE (next);
957 ta->flags = TRANSFER_SAVE_ALL;
958
959 UNLOCK;
960}
961
962static void
963prepare_cede (aTHX_ struct transfer_args *ta) 1565prepare_cede (pTHX_ struct transfer_args *ta)
964{ 1566{
965 LOCK; 1567 api_ready (coro_current);
966 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
967 UNLOCK;
968
969 prepare_schedule (ta); 1568 prepare_schedule (aTHX_ ta);
1569}
1570
1571static int
1572prepare_cede_notself (pTHX_ struct transfer_args *ta)
1573{
1574 if (coro_nready)
1575 {
1576 SV *prev = SvRV (coro_current);
1577 prepare_schedule (aTHX_ ta);
1578 api_ready (prev);
1579 return 1;
1580 }
1581 else
1582 return 0;
970} 1583}
971 1584
972static void 1585static void
973api_schedule (void) 1586api_schedule (void)
974{ 1587{
975 dTHX; 1588 dTHX;
976 struct transfer_args ta; 1589 struct transfer_args ta;
977 1590
978 prepare_schedule (&ta); 1591 prepare_schedule (aTHX_ &ta);
979 TRANSFER (ta); 1592 TRANSFER (ta, 1);
980} 1593}
981 1594
982static void 1595static int
983api_cede (void) 1596api_cede (void)
984{ 1597{
985 dTHX; 1598 dTHX;
986 struct transfer_args ta; 1599 struct transfer_args ta;
987 1600
988 prepare_cede (&ta); 1601 prepare_cede (aTHX_ &ta);
1602
1603 if (expect_true (ta.prev != ta.next))
1604 {
989 TRANSFER (ta); 1605 TRANSFER (ta, 1);
1606 return 1;
1607 }
1608 else
1609 return 0;
990} 1610}
991 1611
1612static int
1613api_cede_notself (void)
1614{
1615 dTHX;
1616 struct transfer_args ta;
1617
1618 if (prepare_cede_notself (aTHX_ &ta))
1619 {
1620 TRANSFER (ta, 1);
1621 return 1;
1622 }
1623 else
1624 return 0;
1625}
1626
1627static void
1628api_trace (SV *coro_sv, int flags)
1629{
1630 dTHX;
1631 struct coro *coro = SvSTATE (coro_sv);
1632
1633 if (flags & CC_TRACE)
1634 {
1635 if (!coro->cctx)
1636 coro->cctx = cctx_new ();
1637 else if (!(coro->cctx->flags & CC_TRACE))
1638 croak ("cannot enable tracing on coroutine with custom stack");
1639
1640 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1641 }
1642 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1643 {
1644 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1645
1646 if (coro->flags & CF_RUNNING)
1647 PL_runops = RUNOPS_DEFAULT;
1648 else
1649 coro->slot->runops = RUNOPS_DEFAULT;
1650 }
1651}
1652
1653static int
1654coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1655{
1656 AV *padlist;
1657 AV *av = (AV *)mg->mg_obj;
1658
1659 abort ();
1660
1661 return 0;
1662}
1663
1664static MGVTBL coro_gensub_vtbl = {
1665 0, 0, 0, 0,
1666 coro_gensub_free
1667};
1668
1669/*****************************************************************************/
1670/* PerlIO::cede */
1671
1672typedef struct
1673{
1674 PerlIOBuf base;
1675 NV next, every;
1676} PerlIOCede;
1677
1678static IV
1679PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1680{
1681 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1682
1683 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1684 self->next = nvtime () + self->every;
1685
1686 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1687}
1688
1689static SV *
1690PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1691{
1692 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1693
1694 return newSVnv (self->every);
1695}
1696
1697static IV
1698PerlIOCede_flush (pTHX_ PerlIO *f)
1699{
1700 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1701 double now = nvtime ();
1702
1703 if (now >= self->next)
1704 {
1705 api_cede ();
1706 self->next = now + self->every;
1707 }
1708
1709 return PerlIOBuf_flush (aTHX_ f);
1710}
1711
1712static PerlIO_funcs PerlIO_cede =
1713{
1714 sizeof(PerlIO_funcs),
1715 "cede",
1716 sizeof(PerlIOCede),
1717 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1718 PerlIOCede_pushed,
1719 PerlIOBuf_popped,
1720 PerlIOBuf_open,
1721 PerlIOBase_binmode,
1722 PerlIOCede_getarg,
1723 PerlIOBase_fileno,
1724 PerlIOBuf_dup,
1725 PerlIOBuf_read,
1726 PerlIOBuf_unread,
1727 PerlIOBuf_write,
1728 PerlIOBuf_seek,
1729 PerlIOBuf_tell,
1730 PerlIOBuf_close,
1731 PerlIOCede_flush,
1732 PerlIOBuf_fill,
1733 PerlIOBase_eof,
1734 PerlIOBase_error,
1735 PerlIOBase_clearerr,
1736 PerlIOBase_setlinebuf,
1737 PerlIOBuf_get_base,
1738 PerlIOBuf_bufsiz,
1739 PerlIOBuf_get_ptr,
1740 PerlIOBuf_get_cnt,
1741 PerlIOBuf_set_ptrcnt,
1742};
1743
1744
992MODULE = Coro::State PACKAGE = Coro::State 1745MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
993 1746
994PROTOTYPES: DISABLE 1747PROTOTYPES: DISABLE
995 1748
996BOOT: 1749BOOT:
997{ 1750{
998#ifdef USE_ITHREADS 1751#ifdef USE_ITHREADS
999 MUTEX_INIT (&coro_mutex); 1752 MUTEX_INIT (&coro_lock);
1000#endif 1753#endif
1001 BOOT_PAGESIZE; 1754 BOOT_PAGESIZE;
1002 1755
1756 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1757 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1758
1759 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1760 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1761 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1762
1763 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1764 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1765 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1766
1003 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1767 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1004 1768
1005 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1769 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1006 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1770 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1007 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1771 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1772 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1008 1773
1009 main_mainstack = PL_mainstack; 1774 main_mainstack = PL_mainstack;
1775 main_top_env = PL_top_env;
1010 1776
1777 while (main_top_env->je_prev)
1778 main_top_env = main_top_env->je_prev;
1779
1011 coroapi.ver = CORO_API_VERSION; 1780 coroapi.ver = CORO_API_VERSION;
1781 coroapi.rev = CORO_API_REVISION;
1012 coroapi.transfer = api_transfer; 1782 coroapi.transfer = api_transfer;
1783
1784 {
1785 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1786
1787 if (!svp) croak ("Time::HiRes is required");
1788 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1789
1790 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1791 }
1013 1792
1014 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1793 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1015} 1794}
1016 1795
1017SV * 1796SV *
1018new (char *klass, ...) 1797new (char *klass, ...)
1019 CODE: 1798 CODE:
1020{ 1799{
1021 struct coro *coro; 1800 struct coro *coro;
1801 MAGIC *mg;
1022 HV *hv; 1802 HV *hv;
1023 int i; 1803 int i;
1024 1804
1025 Newz (0, coro, 1, struct coro); 1805 Newz (0, coro, 1, struct coro);
1026 coro->args = newAV (); 1806 coro->args = newAV ();
1807 coro->flags = CF_NEW;
1027 1808
1809 if (coro_first) coro_first->prev = coro;
1810 coro->next = coro_first;
1811 coro_first = coro;
1812
1028 hv = newHV (); 1813 coro->hv = hv = newHV ();
1029 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1814 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1815 mg->mg_flags |= MGf_DUP;
1030 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1816 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1031 1817
1818 av_extend (coro->args, items - 1);
1032 for (i = 1; i < items; i++) 1819 for (i = 1; i < items; i++)
1033 av_push (coro->args, newSVsv (ST (i))); 1820 av_push (coro->args, newSVsv (ST (i)));
1034
1035 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1036 /*coro->stack = 0;*/
1037} 1821}
1038 OUTPUT: 1822 OUTPUT:
1039 RETVAL 1823 RETVAL
1040 1824
1825# these not obviously related functions are all rolled into the same xs
1826# function to increase chances that they all will call transfer with the same
1827# stack offset
1041void 1828void
1042_set_stacklevel (...) 1829_set_stacklevel (...)
1043 ALIAS: 1830 ALIAS:
1044 Coro::State::transfer = 1 1831 Coro::State::transfer = 1
1045 Coro::schedule = 2 1832 Coro::schedule = 2
1046 Coro::cede = 3 1833 Coro::cede = 3
1047 Coro::Cont::yield = 4 1834 Coro::cede_notself = 4
1048 CODE: 1835 CODE:
1049{ 1836{
1050 struct transfer_args ta; 1837 struct transfer_args ta;
1051 1838
1839 PUTBACK;
1052 switch (ix) 1840 switch (ix)
1053 { 1841 {
1054 case 0: 1842 case 0:
1055 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1843 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1056 ta.next = 0; 1844 ta.next = 0;
1057 ta.flags = TRANSFER_SET_STACKLEVEL;
1058 break; 1845 break;
1059 1846
1060 case 1: 1847 case 1:
1061 if (items != 3) 1848 if (items != 2)
1062 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1849 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1063 1850
1064 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1851 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1065 break; 1852 break;
1066 1853
1067 case 2: 1854 case 2:
1068 prepare_schedule (&ta); 1855 prepare_schedule (aTHX_ &ta);
1069 break; 1856 break;
1070 1857
1071 case 3: 1858 case 3:
1072 prepare_cede (&ta); 1859 prepare_cede (aTHX_ &ta);
1073 break; 1860 break;
1074 1861
1075 case 4: 1862 case 4:
1076 { 1863 if (!prepare_cede_notself (aTHX_ &ta))
1077 SV *yieldstack; 1864 XSRETURN_EMPTY;
1078 SV *sv;
1079 AV *defav = GvAV (PL_defgv);
1080 1865
1081 yieldstack = *hv_fetch (
1082 (HV *)SvRV (GvSV (coro_current)),
1083 "yieldstack", sizeof ("yieldstack") - 1,
1084 0
1085 );
1086
1087 /* set up @_ -- ugly */
1088 av_clear (defav);
1089 av_fill (defav, items - 1);
1090 while (items--)
1091 av_store (defav, items, SvREFCNT_inc (ST(items)));
1092
1093 sv = av_pop ((AV *)SvRV (yieldstack));
1094 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1095 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1096 ta.flags = 0;
1097 SvREFCNT_dec (sv);
1098 }
1099 break; 1866 break;
1100
1101 } 1867 }
1868 SPAGAIN;
1102 1869
1870 BARRIER;
1871 PUTBACK;
1103 TRANSFER (ta); 1872 TRANSFER (ta, 0);
1873 SPAGAIN; /* might be the sp of a different coroutine now */
1874 /* be extra careful not to ever do anything after TRANSFER */
1104} 1875}
1876
1877bool
1878_destroy (SV *coro_sv)
1879 CODE:
1880 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1881 OUTPUT:
1882 RETVAL
1105 1883
1106void 1884void
1107_clone_state_from (SV *dst, SV *src)
1108 CODE:
1109{
1110 struct coro *coro_src = SvSTATE (src);
1111
1112 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1113
1114 ++coro_src->refcnt;
1115 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1116}
1117
1118void
1119_nonlocal_goto (IV nextop)
1120 CODE:
1121 /* uuh, somebody will kill me again for this */
1122 PL_op->op_next = INT2PTR (OP *, nextop);
1123
1124void
1125_exit (code) 1885_exit (int code)
1126 int code
1127 PROTOTYPE: $ 1886 PROTOTYPE: $
1128 CODE: 1887 CODE:
1129 _exit (code); 1888 _exit (code);
1130 1889
1890int
1891cctx_stacksize (int new_stacksize = 0)
1892 CODE:
1893 RETVAL = coro_stacksize;
1894 if (new_stacksize)
1895 coro_stacksize = new_stacksize;
1896 OUTPUT:
1897 RETVAL
1898
1899int
1900cctx_count ()
1901 CODE:
1902 RETVAL = cctx_count;
1903 OUTPUT:
1904 RETVAL
1905
1906int
1907cctx_idle ()
1908 CODE:
1909 RETVAL = cctx_idle;
1910 OUTPUT:
1911 RETVAL
1912
1913void
1914list ()
1915 PPCODE:
1916{
1917 struct coro *coro;
1918 for (coro = coro_first; coro; coro = coro->next)
1919 if (coro->hv)
1920 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1921}
1922
1923void
1924call (Coro::State coro, SV *coderef)
1925 ALIAS:
1926 eval = 1
1927 CODE:
1928{
1929 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1930 {
1931 struct coro temp;
1932
1933 if (!(coro->flags & CF_RUNNING))
1934 {
1935 PUTBACK;
1936 save_perl (aTHX_ &temp);
1937 load_perl (aTHX_ coro);
1938 }
1939
1940 {
1941 dSP;
1942 ENTER;
1943 SAVETMPS;
1944 PUTBACK;
1945 PUSHSTACK;
1946 PUSHMARK (SP);
1947
1948 if (ix)
1949 eval_sv (coderef, 0);
1950 else
1951 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1952
1953 POPSTACK;
1954 SPAGAIN;
1955 FREETMPS;
1956 LEAVE;
1957 PUTBACK;
1958 }
1959
1960 if (!(coro->flags & CF_RUNNING))
1961 {
1962 save_perl (aTHX_ coro);
1963 load_perl (aTHX_ &temp);
1964 SPAGAIN;
1965 }
1966 }
1967}
1968
1969SV *
1970is_ready (Coro::State coro)
1971 PROTOTYPE: $
1972 ALIAS:
1973 is_ready = CF_READY
1974 is_running = CF_RUNNING
1975 is_new = CF_NEW
1976 is_destroyed = CF_DESTROYED
1977 CODE:
1978 RETVAL = boolSV (coro->flags & ix);
1979 OUTPUT:
1980 RETVAL
1981
1982void
1983api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1984
1985SV *
1986has_cctx (Coro::State coro)
1987 PROTOTYPE: $
1988 CODE:
1989 RETVAL = boolSV (!!coro->cctx);
1990 OUTPUT:
1991 RETVAL
1992
1993int
1994is_traced (Coro::State coro)
1995 PROTOTYPE: $
1996 CODE:
1997 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1998 OUTPUT:
1999 RETVAL
2000
2001IV
2002rss (Coro::State coro)
2003 PROTOTYPE: $
2004 ALIAS:
2005 usecount = 1
2006 CODE:
2007 switch (ix)
2008 {
2009 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2010 case 1: RETVAL = coro->usecount; break;
2011 }
2012 OUTPUT:
2013 RETVAL
2014
2015void
2016force_cctx ()
2017 CODE:
2018 struct coro *coro = SvSTATE (coro_current);
2019 coro->cctx->idle_sp = 0;
2020
2021void
2022swap_defsv (Coro::State self)
2023 PROTOTYPE: $
2024 ALIAS:
2025 swap_defav = 1
2026 CODE:
2027 if (!self->slot)
2028 croak ("cannot swap state with coroutine that has no saved state");
2029 else
2030 {
2031 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2032 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2033
2034 SV *tmp = *src; *src = *dst; *dst = tmp;
2035 }
2036
1131MODULE = Coro::State PACKAGE = Coro 2037MODULE = Coro::State PACKAGE = Coro
1132 2038
1133BOOT: 2039BOOT:
1134{ 2040{
1135 int i; 2041 int i;
1136 2042
2043 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2044 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2045 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2046
2047 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2048 SvREADONLY_on (coro_current);
2049
1137 coro_stash = gv_stashpv ("Coro", TRUE); 2050 coro_stash = gv_stashpv ("Coro", TRUE);
1138 2051
1139 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2052 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1140 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2053 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1141 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2054 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1142 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2055 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1143 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2056 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1144 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2057 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1145 2058
1146 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1147 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1148
1149 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2059 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1150 coro_ready[i] = newAV (); 2060 coro_ready[i] = newAV ();
1151 2061
1152 { 2062 {
1153 SV *sv = perl_get_sv("Coro::API", 1); 2063 SV *sv = perl_get_sv ("Coro::API", TRUE);
2064 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1154 2065
1155 coroapi.schedule = api_schedule; 2066 coroapi.schedule = api_schedule;
1156 coroapi.cede = api_cede; 2067 coroapi.cede = api_cede;
2068 coroapi.cede_notself = api_cede_notself;
1157 coroapi.ready = api_ready; 2069 coroapi.ready = api_ready;
2070 coroapi.is_ready = api_is_ready;
1158 coroapi.nready = &coro_nready; 2071 coroapi.nready = &coro_nready;
1159 coroapi.current = coro_current; 2072 coroapi.current = coro_current;
1160 2073
1161 GCoroAPI = &coroapi; 2074 GCoroAPI = &coroapi;
1162 sv_setiv (sv, (IV)&coroapi); 2075 sv_setiv (sv, (IV)&coroapi);
1163 SvREADONLY_on (sv); 2076 SvREADONLY_on (sv);
1164 } 2077 }
1165} 2078}
2079
2080void
2081_set_current (SV *current)
2082 PROTOTYPE: $
2083 CODE:
2084 SvREFCNT_dec (SvRV (coro_current));
2085 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2086
2087void
2088_set_readyhook (SV *hook)
2089 PROTOTYPE: $
2090 CODE:
2091 LOCK;
2092 SvREFCNT_dec (coro_readyhook);
2093 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2094 UNLOCK;
1166 2095
1167int 2096int
1168prio (Coro::State coro, int newprio = 0) 2097prio (Coro::State coro, int newprio = 0)
1169 ALIAS: 2098 ALIAS:
1170 nice = 1 2099 nice = 1
… …
1173 RETVAL = coro->prio; 2102 RETVAL = coro->prio;
1174 2103
1175 if (items > 1) 2104 if (items > 1)
1176 { 2105 {
1177 if (ix) 2106 if (ix)
1178 newprio += coro->prio; 2107 newprio = coro->prio - newprio;
1179 2108
1180 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2109 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1181 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2110 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1182 2111
1183 coro->prio = newprio; 2112 coro->prio = newprio;
1184 } 2113 }
1185} 2114}
2115 OUTPUT:
2116 RETVAL
1186 2117
1187void 2118SV *
1188ready (SV *self) 2119ready (SV *self)
1189 PROTOTYPE: $ 2120 PROTOTYPE: $
1190 CODE: 2121 CODE:
1191 api_ready (self); 2122 RETVAL = boolSV (api_ready (self));
2123 OUTPUT:
2124 RETVAL
1192 2125
1193int 2126int
1194nready (...) 2127nready (...)
1195 PROTOTYPE: 2128 PROTOTYPE:
1196 CODE: 2129 CODE:
1197 RETVAL = coro_nready; 2130 RETVAL = coro_nready;
1198 OUTPUT: 2131 OUTPUT:
1199 RETVAL 2132 RETVAL
1200 2133
1201MODULE = Coro::State PACKAGE = Coro::AIO 2134void
2135throw (Coro::State self, SV *throw = &PL_sv_undef)
2136 PROTOTYPE: $;$
2137 CODE:
2138 SvREFCNT_dec (self->throw);
2139 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2140
2141# for async_pool speedup
2142void
2143_pool_1 (SV *cb)
2144 CODE:
2145{
2146 struct coro *coro = SvSTATE (coro_current);
2147 HV *hv = (HV *)SvRV (coro_current);
2148 AV *defav = GvAV (PL_defgv);
2149 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2150 AV *invoke_av;
2151 int i, len;
2152
2153 if (!invoke)
2154 {
2155 SV *old = PL_diehook;
2156 PL_diehook = 0;
2157 SvREFCNT_dec (old);
2158 croak ("\3async_pool terminate\2\n");
2159 }
2160
2161 SvREFCNT_dec (coro->saved_deffh);
2162 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2163
2164 hv_store (hv, "desc", sizeof ("desc") - 1,
2165 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2166
2167 invoke_av = (AV *)SvRV (invoke);
2168 len = av_len (invoke_av);
2169
2170 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2171
2172 if (len > 0)
2173 {
2174 av_fill (defav, len - 1);
2175 for (i = 0; i < len; ++i)
2176 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2177 }
2178
2179 SvREFCNT_dec (invoke);
2180}
2181
2182void
2183_pool_2 (SV *cb)
2184 CODE:
2185{
2186 struct coro *coro = SvSTATE (coro_current);
2187
2188 sv_setsv (cb, &PL_sv_undef);
2189
2190 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2191 coro->saved_deffh = 0;
2192
2193 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2194 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2195 {
2196 SV *old = PL_diehook;
2197 PL_diehook = 0;
2198 SvREFCNT_dec (old);
2199 croak ("\3async_pool terminate\2\n");
2200 }
2201
2202 av_clear (GvAV (PL_defgv));
2203 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2204 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2205
2206 coro->prio = 0;
2207
2208 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2209 api_trace (coro_current, 0);
2210
2211 av_push (av_async_pool, newSVsv (coro_current));
2212}
2213
2214#if 0
2215
2216void
2217_generator_call (...)
2218 PROTOTYPE: @
2219 PPCODE:
2220 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2221 xxxx
2222 abort ();
1202 2223
1203SV * 2224SV *
1204_get_state () 2225gensub (SV *sub, ...)
1205 CODE: 2226 PROTOTYPE: &;@
2227 CODE:
1206{ 2228{
1207 struct { 2229 struct coro *coro;
1208 int errorno; 2230 MAGIC *mg;
1209 int laststype; 2231 CV *xcv;
1210 int laststatval; 2232 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1211 Stat_t statcache; 2233 int i;
1212 } data;
1213 2234
1214 data.errorno = errno; 2235 CvGV (ncv) = CvGV (cv);
1215 data.laststype = PL_laststype; 2236 CvFILE (ncv) = CvFILE (cv);
1216 data.laststatval = PL_laststatval;
1217 data.statcache = PL_statcache;
1218 2237
1219 RETVAL = newSVpvn ((char *)&data, sizeof data); 2238 Newz (0, coro, 1, struct coro);
2239 coro->args = newAV ();
2240 coro->flags = CF_NEW;
2241
2242 av_extend (coro->args, items - 1);
2243 for (i = 1; i < items; i++)
2244 av_push (coro->args, newSVsv (ST (i)));
2245
2246 CvISXSUB_on (ncv);
2247 CvXSUBANY (ncv).any_ptr = (void *)coro;
2248
2249 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2250
2251 CvXSUB (ncv) = CvXSUB (xcv);
2252 CvANON_on (ncv);
2253
2254 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2255 RETVAL = newRV_noinc ((SV *)ncv);
1220} 2256}
1221 OUTPUT: 2257 OUTPUT:
1222 RETVAL 2258 RETVAL
1223 2259
2260#endif
2261
2262
2263MODULE = Coro::State PACKAGE = Coro::AIO
2264
1224void 2265void
1225_set_state (char *data_) 2266_get_state (SV *self)
2267 PPCODE:
2268{
2269 AV *defav = GvAV (PL_defgv);
2270 AV *av = newAV ();
2271 int i;
2272 SV *data_sv = newSV (sizeof (struct io_state));
2273 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2274 SvCUR_set (data_sv, sizeof (struct io_state));
2275 SvPOK_only (data_sv);
2276
2277 data->errorno = errno;
2278 data->laststype = PL_laststype;
2279 data->laststatval = PL_laststatval;
2280 data->statcache = PL_statcache;
2281
2282 av_extend (av, AvFILLp (defav) + 1 + 1);
2283
2284 for (i = 0; i <= AvFILLp (defav); ++i)
2285 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2286
2287 av_push (av, data_sv);
2288
2289 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2290
2291 api_ready (self);
2292}
2293
2294void
2295_set_state (SV *state)
1226 PROTOTYPE: $ 2296 PROTOTYPE: $
2297 PPCODE:
2298{
2299 AV *av = (AV *)SvRV (state);
2300 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2301 int i;
2302
2303 errno = data->errorno;
2304 PL_laststype = data->laststype;
2305 PL_laststatval = data->laststatval;
2306 PL_statcache = data->statcache;
2307
2308 EXTEND (SP, AvFILLp (av));
2309 for (i = 0; i < AvFILLp (av); ++i)
2310 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2311}
2312
2313
2314MODULE = Coro::State PACKAGE = Coro::AnyEvent
2315
2316BOOT:
2317 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2318
2319SV *
2320_schedule (...)
2321 PROTOTYPE: @
1227 CODE: 2322 CODE:
1228{ 2323{
1229 struct { 2324 static int incede;
1230 int errorno;
1231 int laststype;
1232 int laststatval;
1233 Stat_t statcache;
1234 } *data = (void *)data_;
1235 2325
1236 errno = data->errorno; 2326 api_cede_notself ();
1237 PL_laststype = data->laststype; 2327
1238 PL_laststatval = data->laststatval; 2328 ++incede;
1239 PL_statcache = data->statcache; 2329 while (coro_nready >= incede && api_cede ())
2330 ;
2331
2332 sv_setsv (sv_activity, &PL_sv_undef);
2333 if (coro_nready >= incede)
2334 {
2335 PUSHMARK (SP);
2336 PUTBACK;
2337 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2338 SPAGAIN;
2339 }
2340
2341 --incede;
1240} 2342}
2343
2344
2345MODULE = Coro::State PACKAGE = PerlIO::cede
2346
2347BOOT:
2348 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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