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Comparing Coro/Coro/State.xs (file contents):
Revision 1.87 by root, Fri Nov 24 13:40:36 2006 UTC vs.
Revision 1.251 by root, Thu Oct 30 09:44:31 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 <errno.h> 86/* 5.11 */
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
33 108
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 110# undef CORO_STACKGUARD
36#endif
37
38#ifndef STACKGUARD
39# define STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif
51# endif 111#endif
52# include <limits.h> 112
53# ifndef PAGESIZE 113#ifndef CORO_STACKGUARD
54# define PAGESIZE pagesize 114# define CORO_STACKGUARD 0
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif 115#endif
60#endif
61 116
62#define SUB_INIT "Coro::State::initialize" 117/* prefer perl internal functions over our own? */
63#define UCORO_STATE "_coro_state" 118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
64 121
65/* The next macro should declare a variable stacklevel that contains and approximation 122/* The next macros try to return the current stack pointer, in an as
66 * to the current C stack pointer. Its property is that it changes with each call 123 * portable way as possible. */
67 * and should be unique. */ 124#define dSTACKLEVEL volatile char stacklevel
68#define dSTACKLEVEL void *stacklevel = &stacklevel 125#define STACKLEVEL ((void *)&stacklevel)
69 126
70#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
71 128
72#define labs(l) ((l) >= 0 ? (l) : -(l)) 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))
73 143
74#include "CoroAPI.h" 144#include "CoroAPI.h"
75 145
76#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
77static perl_mutex coro_mutex; 147static perl_mutex coro_mutex;
… …
80#else 150#else
81# define LOCK (void)0 151# define LOCK (void)0
82# define UNLOCK (void)0 152# define UNLOCK (void)0
83#endif 153#endif
84 154
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;
85static struct CoroAPI coroapi; 168static struct CoroAPI coroapi;
86static 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;
87static HV *coro_state_stash; 171static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 172static volatile SV *coro_mortal; /* will be freed after next transfer */
91 173
92/* this is actually not only the c stack but also c registers etc... */ 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};
199
200/* this is a structure representing a c-level coroutine */
201typedef struct coro_cctx {
202 struct coro_cctx *next;
203
204 /* the stack */
205 void *sptr;
206 size_t ssize;
207
208 /* cpu state */
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 */
211 JMPENV *top_env;
212 coro_context cctx;
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 */
93typedef struct { 228typedef struct {
94 int refcnt; /* pointer reference counter */ 229 SV *defsv;
95 int usecnt; /* shared by how many coroutines */ 230 AV *defav;
96 int gencnt; /* generation counter */ 231 SV *errsv;
232 SV *irsgv;
233#define VAR(name,type) type name;
234# include "state.h"
235#undef VAR
236} perl_slots;
97 237
98 coro_context cctx; 238#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
99 239
100 void *sptr; 240/* this is a structure representing a perl-level coroutine */
101 long ssize; /* positive == mmap, otherwise malloc */
102} coro_stack;
103
104struct coro { 241struct coro {
105 /* the optional C context */ 242 /* the c coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 243 coro_cctx *cctx;
107 void *cursp;
108 int gencnt;
109 244
110 /* optionally saved, might be zero */ 245 /* process data */
111 AV *defav;
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118
119 /* the stacks and related info (callchain etc..) */
120 PERL_SI *curstackinfo;
121 AV *curstack;
122 AV *mainstack; 246 AV *mainstack;
123 SV **stack_sp; 247 perl_slots *slot; /* basically the saved sp */
124 OP *op; 248
125 SV **curpad; 249 AV *args; /* data associated with this coroutine (initial args) */
126 AV *comppad; 250 int refcnt; /* coroutines are refcounted, yes */
127 CV *compcv; 251 int flags; /* CF_ flags */
128 SV **stack_base; 252 HV *hv; /* the perl hash associated with this coro, if any */
129 SV **stack_max; 253
130 SV **tmps_stack; 254 /* statistics */
131 I32 tmps_floor; 255 int usecount; /* number of transfers to this coro */
132 I32 tmps_ix;
133 I32 tmps_max;
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 JMPENV *top_env;
149 256
150 /* coro process data */ 257 /* coro process data */
151 int prio; 258 int prio;
259 SV *throw; /* exception to be thrown */
152 260
153 /* data associated with this coroutine (initial args) */ 261 /* async_pool */
154 AV *args; 262 SV *saved_deffh;
155 int refcnt; 263
264 /* linked list */
265 struct coro *next, *prev;
156}; 266};
157 267
158typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
159typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
160 270
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
161static AV * 319static AV *
162coro_clone_padlist (pTHX_ CV *cv) 320coro_clone_padlist (pTHX_ CV *cv)
163{ 321{
164 AV *padlist = CvPADLIST (cv); 322 AV *padlist = CvPADLIST (cv);
165 AV *newpadlist, *newpad; 323 AV *newpadlist, *newpad;
166 324
167 newpadlist = newAV (); 325 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 326 AvREAL_off (newpadlist);
169#if PERL_VERSION < 9 327#if PERL_VERSION_ATLEAST (5,10,0)
328 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
329#else
170 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173#endif 331#endif
174 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 332 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175 --AvFILLp (padlist); 333 --AvFILLp (padlist);
176 334
177 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 335 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
178 av_store (newpadlist, 1, (SV *)newpad); 336 av_store (newpadlist, 1, (SV *)newpad);
179 337
180 return newpadlist; 338 return newpadlist;
181} 339}
182 340
… …
212 370
213 /* casting is fun. */ 371 /* casting is fun. */
214 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 372 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215 free_padlist (aTHX_ padlist); 373 free_padlist (aTHX_ padlist);
216 374
217 SvREFCNT_dec (av); 375 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
218 376
219 return 0; 377 return 0;
220} 378}
221 379
222#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
223 382
224static 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))
225 423
226/* the next two functions merely cache the padlists */ 424/* the next two functions merely cache the padlists */
227static void 425static void
228get_padlist (pTHX_ CV *cv) 426get_padlist (pTHX_ CV *cv)
229{ 427{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 428 MAGIC *mg = CORO_MAGIC_cv (cv);
429 AV *av;
231 430
232 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 431 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
233 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 432 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234 else 433 else
235 { 434 {
236#if 0 435#if CORO_PREFER_PERL_FUNCTIONS
237 /* this should work - but it doesn't :( */ 436 /* this is probably cleaner? but also slower! */
437 /* in practise, it seems to be less stable */
238 CV *cp = Perl_cv_clone (aTHX_ cv); 438 CV *cp = Perl_cv_clone (cv);
239 CvPADLIST (cv) = CvPADLIST (cp); 439 CvPADLIST (cv) = CvPADLIST (cp);
240 CvPADLIST (cp) = 0; 440 CvPADLIST (cp) = 0;
241 SvREFCNT_dec (cp); 441 SvREFCNT_dec (cp);
242#else 442#else
243 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 443 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
246} 446}
247 447
248static void 448static void
249put_padlist (pTHX_ CV *cv) 449put_padlist (pTHX_ CV *cv)
250{ 450{
251 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 451 MAGIC *mg = CORO_MAGIC_cv (cv);
452 AV *av;
252 453
253 if (!mg) 454 if (expect_false (!mg))
254 { 455 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
255 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257 mg->mg_virtual = &vtbl_coro;
258 mg->mg_obj = (SV *)newAV ();
259 }
260 456
261 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 457 av = (AV *)mg->mg_obj;
262}
263 458
264#define SB do { 459 if (expect_false (AvFILLp (av) >= AvMAX (av)))
265#define SE } while (0) 460 av_extend (av, AvMAX (av) + 1);
266 461
267#define LOAD(state) load_state(aTHX_ (state)); 462 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
268#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 463}
269 464
270#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 465/** load & save, init *******************************************************/
271 466
272static void 467static void
273load_state(pTHX_ Coro__State c) 468load_perl (pTHX_ Coro__State c)
274{ 469{
275 PL_dowarn = c->dowarn; 470 perl_slots *slot = c->slot;
276 PL_in_eval = c->in_eval; 471 c->slot = 0;
277 472
278 PL_curstackinfo = c->curstackinfo;
279 PL_curstack = c->curstack;
280 PL_mainstack = c->mainstack; 473 PL_mainstack = c->mainstack;
281 PL_stack_sp = c->stack_sp;
282 PL_op = c->op;
283 PL_curpad = c->curpad;
284 PL_comppad = c->comppad;
285 PL_compcv = c->compcv;
286 PL_stack_base = c->stack_base;
287 PL_stack_max = c->stack_max;
288 PL_tmps_stack = c->tmps_stack;
289 PL_tmps_floor = c->tmps_floor;
290 PL_tmps_ix = c->tmps_ix;
291 PL_tmps_max = c->tmps_max;
292 PL_markstack = c->markstack;
293 PL_markstack_ptr = c->markstack_ptr;
294 PL_markstack_max = c->markstack_max;
295 PL_scopestack = c->scopestack;
296 PL_scopestack_ix = c->scopestack_ix;
297 PL_scopestack_max = c->scopestack_max;
298 PL_savestack = c->savestack;
299 PL_savestack_ix = c->savestack_ix;
300 PL_savestack_max = c->savestack_max;
301#if PERL_VERSION < 9
302 PL_retstack = c->retstack;
303 PL_retstack_ix = c->retstack_ix;
304 PL_retstack_max = c->retstack_max;
305#endif
306 PL_curpm = c->curpm;
307 PL_curcop = c->curcop;
308 PL_top_env = c->top_env;
309 474
310 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 475 GvSV (PL_defgv) = slot->defsv;
311 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 476 GvAV (PL_defgv) = slot->defav;
312 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
313 483
314 { 484 {
315 dSP; 485 dSP;
486
316 CV *cv; 487 CV *cv;
317 488
318 /* now do the ugly restore mess */ 489 /* now do the ugly restore mess */
319 while ((cv = (CV *)POPs)) 490 while (expect_true (cv = (CV *)POPs))
320 { 491 {
321 AV *padlist = (AV *)POPs;
322
323 if (padlist)
324 {
325 put_padlist (aTHX_ cv); /* mark this padlist as available */ 492 put_padlist (aTHX_ cv); /* mark this padlist as available */
326 CvPADLIST(cv) = padlist; 493 CvDEPTH (cv) = PTR2IV (POPs);
327 } 494 CvPADLIST (cv) = (AV *)POPs;
328
329 ++CvDEPTH(cv);
330 } 495 }
331 496
332 PUTBACK; 497 PUTBACK;
333 } 498 }
334} 499}
335 500
336static void 501static void
337save_state(pTHX_ Coro__State c, int flags) 502save_perl (pTHX_ Coro__State c)
338{ 503{
339 { 504 {
340 dSP; 505 dSP;
341 I32 cxix = cxstack_ix; 506 I32 cxix = cxstack_ix;
342 PERL_CONTEXT *ccstk = cxstack; 507 PERL_CONTEXT *ccstk = cxstack;
… …
345 /* 510 /*
346 * 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
347 * (and reinitialize) all cv's in the whole callchain :( 512 * (and reinitialize) all cv's in the whole callchain :(
348 */ 513 */
349 514
350 PUSHs (Nullsv); 515 XPUSHs (Nullsv);
351 /* this loop was inspired by pp_caller */ 516 /* this loop was inspired by pp_caller */
352 for (;;) 517 for (;;)
353 { 518 {
354 while (cxix >= 0) 519 while (expect_true (cxix >= 0))
355 { 520 {
356 PERL_CONTEXT *cx = &ccstk[cxix--]; 521 PERL_CONTEXT *cx = &ccstk[cxix--];
357 522
358 if (CxTYPE(cx) == CXt_SUB) 523 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
359 { 524 {
360 CV *cv = cx->blk_sub.cv; 525 CV *cv = cx->blk_sub.cv;
526
361 if (CvDEPTH(cv)) 527 if (expect_true (CvDEPTH (cv)))
362 { 528 {
363 EXTEND (SP, CvDEPTH(cv)*2); 529 EXTEND (SP, 3);
364
365 while (--CvDEPTH(cv))
366 {
367 /* this tells the restore code to increment CvDEPTH */
368 PUSHs (Nullsv);
369 PUSHs ((SV *)cv);
370 }
371
372 PUSHs ((SV *)CvPADLIST(cv)); 530 PUSHs ((SV *)CvPADLIST (cv));
531 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
373 PUSHs ((SV *)cv); 532 PUSHs ((SV *)cv);
374 533
534 CvDEPTH (cv) = 0;
375 get_padlist (aTHX_ cv); 535 get_padlist (aTHX_ cv);
376 } 536 }
377 } 537 }
378#ifdef CXt_FORMAT
379 else if (CxTYPE(cx) == CXt_FORMAT)
380 {
381 /* I never used formats, so how should I know how these are implemented? */
382 /* my bold guess is as a simple, plain sub... */
383 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384 }
385#endif
386 } 538 }
387 539
388 if (top_si->si_type == PERLSI_MAIN) 540 if (expect_true (top_si->si_type == PERLSI_MAIN))
389 break; 541 break;
390 542
391 top_si = top_si->si_prev; 543 top_si = top_si->si_prev;
392 ccstk = top_si->si_cxstack; 544 ccstk = top_si->si_cxstack;
393 cxix = top_si->si_cxix; 545 cxix = top_si->si_cxix;
394 } 546 }
395 547
396 PUTBACK; 548 PUTBACK;
397 } 549 }
398 550
399 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 551 /* allocate some space on the context stack for our purposes */
400 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 552 /* we manually unroll here, as usually 2 slots is enough */
401 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 */
402 562
403 c->dowarn = PL_dowarn;
404 c->in_eval = PL_in_eval;
405
406 c->curstackinfo = PL_curstackinfo;
407 c->curstack = PL_curstack;
408 c->mainstack = PL_mainstack; 563 c->mainstack = PL_mainstack;
409 c->stack_sp = PL_stack_sp; 564
410 c->op = PL_op; 565 {
411 c->curpad = PL_curpad; 566 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
412 c->comppad = PL_comppad; 567
413 c->compcv = PL_compcv; 568 slot->defav = GvAV (PL_defgv);
414 c->stack_base = PL_stack_base; 569 slot->defsv = DEFSV;
415 c->stack_max = PL_stack_max; 570 slot->errsv = ERRSV;
416 c->tmps_stack = PL_tmps_stack; 571 slot->irsgv = GvSV (irsgv);
417 c->tmps_floor = PL_tmps_floor; 572
418 c->tmps_ix = PL_tmps_ix; 573 #define VAR(name,type) slot->name = PL_ ## name;
419 c->tmps_max = PL_tmps_max; 574 # include "state.h"
420 c->markstack = PL_markstack; 575 #undef VAR
421 c->markstack_ptr = PL_markstack_ptr; 576 }
422 c->markstack_max = PL_markstack_max;
423 c->scopestack = PL_scopestack;
424 c->scopestack_ix = PL_scopestack_ix;
425 c->scopestack_max = PL_scopestack_max;
426 c->savestack = PL_savestack;
427 c->savestack_ix = PL_savestack_ix;
428 c->savestack_max = PL_savestack_max;
429#if PERL_VERSION < 9
430 c->retstack = PL_retstack;
431 c->retstack_ix = PL_retstack_ix;
432 c->retstack_max = PL_retstack_max;
433#endif
434 c->curpm = PL_curpm;
435 c->curcop = PL_curcop;
436 c->top_env = PL_top_env;
437} 577}
438 578
439/* 579/*
440 * allocate various perl stacks. This is an exact copy 580 * allocate various perl stacks. This is an exact copy
441 * of perl.c:init_stacks, except that it uses less memory 581 * of perl.c:init_stacks, except that it uses less memory
442 * on the (sometimes correct) assumption that coroutines do 582 * on the (sometimes correct) assumption that coroutines do
443 * not usually need a lot of stackspace. 583 * not usually need a lot of stackspace.
444 */ 584 */
585#if CORO_PREFER_PERL_FUNCTIONS
586# define coro_init_stacks init_stacks
587#else
445static void 588static void
446coro_init_stacks (pTHX) 589coro_init_stacks (pTHX)
447{ 590{
448 LOCK; 591 PL_curstackinfo = new_stackinfo(32, 8);
449
450 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451 PL_curstackinfo->si_type = PERLSI_MAIN; 592 PL_curstackinfo->si_type = PERLSI_MAIN;
452 PL_curstack = PL_curstackinfo->si_stack; 593 PL_curstack = PL_curstackinfo->si_stack;
453 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 594 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454 595
455 PL_stack_base = AvARRAY(PL_curstack); 596 PL_stack_base = AvARRAY(PL_curstack);
456 PL_stack_sp = PL_stack_base; 597 PL_stack_sp = PL_stack_base;
457 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 598 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458 599
459 New(50,PL_tmps_stack,96,SV*); 600 New(50,PL_tmps_stack,32,SV*);
460 PL_tmps_floor = -1; 601 PL_tmps_floor = -1;
461 PL_tmps_ix = -1; 602 PL_tmps_ix = -1;
462 PL_tmps_max = 96; 603 PL_tmps_max = 32;
463 604
464 New(54,PL_markstack,16,I32); 605 New(54,PL_markstack,16,I32);
465 PL_markstack_ptr = PL_markstack; 606 PL_markstack_ptr = PL_markstack;
466 PL_markstack_max = PL_markstack + 16; 607 PL_markstack_max = PL_markstack + 16;
467 608
468#ifdef SET_MARK_OFFSET 609#ifdef SET_MARK_OFFSET
469 SET_MARK_OFFSET; 610 SET_MARK_OFFSET;
470#endif 611#endif
471 612
472 New(54,PL_scopestack,16,I32); 613 New(54,PL_scopestack,8,I32);
473 PL_scopestack_ix = 0; 614 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16; 615 PL_scopestack_max = 8;
475 616
476 New(54,PL_savestack,96,ANY); 617 New(54,PL_savestack,24,ANY);
477 PL_savestack_ix = 0; 618 PL_savestack_ix = 0;
478 PL_savestack_max = 96; 619 PL_savestack_max = 24;
479 620
480#if PERL_VERSION < 9 621#if !PERL_VERSION_ATLEAST (5,10,0)
481 New(54,PL_retstack,8,OP*); 622 New(54,PL_retstack,4,OP*);
482 PL_retstack_ix = 0; 623 PL_retstack_ix = 0;
483 PL_retstack_max = 8; 624 PL_retstack_max = 4;
484#endif 625#endif
485
486 UNLOCK;
487} 626}
627#endif
488 628
489/* 629/*
490 * destroy the stacks, the callchain etc... 630 * destroy the stacks, the callchain etc...
491 */ 631 */
492static void 632static void
493destroy_stacks(pTHX) 633coro_destroy_stacks (pTHX)
494{ 634{
495 if (!IN_DESTRUCT)
496 {
497 /* is this ugly, I ask? */
498 LEAVE_SCOPE (0);
499
500 /* sure it is, but more important: is it correct?? :/ */
501 FREETMPS;
502
503 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
504 }
505
506 while (PL_curstackinfo->si_next) 635 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 636 PL_curstackinfo = PL_curstackinfo->si_next;
508 637
509 while (PL_curstackinfo) 638 while (PL_curstackinfo)
510 { 639 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 640 PERL_SI *p = PL_curstackinfo->si_prev;
512 641
513 { /*D*//*remove*/
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (!IN_DESTRUCT) 642 if (!IN_DESTRUCT)
520 {
521 dounwind (-1);/*D*//*remove*/
522 SvREFCNT_dec (PL_curstackinfo->si_stack); 643 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 }
524 644
525 Safefree (PL_curstackinfo->si_cxstack); 645 Safefree (PL_curstackinfo->si_cxstack);
526 Safefree (PL_curstackinfo); 646 Safefree (PL_curstackinfo);
527 PL_curstackinfo = p; 647 PL_curstackinfo = p;
528 } 648 }
529 649
530 Safefree (PL_tmps_stack); 650 Safefree (PL_tmps_stack);
531 Safefree (PL_markstack); 651 Safefree (PL_markstack);
532 Safefree (PL_scopestack); 652 Safefree (PL_scopestack);
533 Safefree (PL_savestack); 653 Safefree (PL_savestack);
534#if PERL_VERSION < 9 654#if !PERL_VERSION_ATLEAST (5,10,0)
535 Safefree (PL_retstack); 655 Safefree (PL_retstack);
536#endif 656#endif
537} 657}
538 658
539static void 659static size_t
540allocate_stack (Coro__State ctx, int alloc) 660coro_rss (pTHX_ struct coro *coro)
541{ 661{
542 coro_stack *stack; 662 size_t rss = sizeof (*coro);
543 663
544 New (0, stack, 1, coro_stack); 664 if (coro->mainstack)
545
546 stack->refcnt = 1;
547 stack->usecnt = 1;
548 stack->gencnt = ctx->gencnt = 0;
549
550 if (alloc)
551 { 665 {
552#if HAVE_MMAP 666 perl_slots tmp_slot;
553 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 667 perl_slots *slot;
554 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 668
555 if (stack->sptr != (void *)-1) 669 if (coro->flags & CF_RUNNING)
556 { 670 {
557# if STACKGUARD 671 slot = &tmp_slot;
558 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 672
559# endif 673 #define VAR(name,type) slot->name = PL_ ## name;
674 # include "state.h"
675 #undef VAR
560 } 676 }
561 else 677 else
562#endif 678 slot = coro->slot;
679
680 if (slot)
563 { 681 {
564 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 682 rss += sizeof (slot->curstackinfo);
565 New (0, stack->sptr, STACKSIZE, long); 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
566 } 693 }
567 } 694 }
568 else
569 stack->sptr = 0;
570 695
571 ctx->stack = stack; 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;
572} 789}
573 790
574static void 791static void
575deallocate_stack (Coro__State ctx) 792coro_setup (pTHX_ struct coro *coro)
576{
577 coro_stack *stack = ctx->stack;
578
579 ctx->stack = 0;
580
581 if (stack)
582 {
583 if (!--stack->refcnt)
584 {
585#ifdef HAVE_MMAP
586 if (stack->ssize > 0 && stack->sptr)
587 munmap (stack->sptr, stack->ssize);
588 else
589#endif
590 Safefree (stack->sptr);
591
592 Safefree (stack);
593 }
594 else if (ctx->gencnt == stack->gencnt)
595 --stack->usecnt;
596 }
597}
598
599static void
600setup_coro (void *arg)
601{ 793{
602 /* 794 /*
603 * emulate part of the perl startup here. 795 * emulate part of the perl startup here.
604 */ 796 */
605 dTHX;
606 dSP;
607 Coro__State ctx = (Coro__State)arg;
608 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
609
610 coro_init_stacks (aTHX); 797 coro_init_stacks (aTHX);
611 /*PL_curcop = 0;*/ 798
612 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 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_destroy (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));
613 SvREFCNT_dec (GvAV (PL_defgv)); 868 SvREFCNT_dec (GvAV (PL_defgv));
614 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 869 SvREFCNT_dec (GvSV (PL_errgv));
870 SvREFCNT_dec (PL_defoutgv);
871 SvREFCNT_dec (PL_rs);
872 SvREFCNT_dec (GvSV (irsgv));
615 873
616 SPAGAIN; 874 SvREFCNT_dec (PL_diehook);
875 SvREFCNT_dec (PL_warnhook);
876
877 SvREFCNT_dec (coro->saved_deffh);
878 SvREFCNT_dec (coro->throw);
617 879
618 if (ctx->stack) 880 coro_destroy_stacks (aTHX);
619 {
620 ctx->cursp = 0;
621
622 PUSHMARK(SP);
623 PUTBACK;
624 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
625
626 if (SvTRUE (ERRSV))
627 croak (NULL);
628 else
629 croak ("FATAL: CCTXT coroutine returned!");
630 }
631 else
632 {
633 UNOP myop;
634
635 Zero(&myop, 1, UNOP);
636 myop.op_next = Nullop;
637 myop.op_flags = OPf_WANT_VOID;
638
639 PL_op = (OP *)&myop;
640
641 PUSHMARK(SP);
642 XPUSHs (sub_init);
643 /*
644 * the next line is slightly wrong, as PL_op->op_next
645 * is actually being executed so we skip the first op.
646 * that doesn't matter, though, since it is only
647 * pp_nextstate and we never return...
648 * ah yes, and I don't care anyways ;)
649 */
650 PUTBACK;
651 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652 SPAGAIN;
653
654 ENTER; /* necessary e.g. for dounwind */
655 }
656} 881}
657 882
658static void 883static void
659continue_coro (void *arg) 884free_coro_mortal (pTHX)
660{ 885{
661 /* 886 if (expect_true (coro_mortal))
662 * this is a _very_ stripped down perl interpreter ;) 887 {
663 */ 888 SvREFCNT_dec (coro_mortal);
664 dTHX; 889 coro_mortal = 0;
665 Coro__State ctx = (Coro__State)arg;
666
667 PL_top_env = &PL_start_env;
668
669 ctx->cursp = 0;
670 PL_op = PL_op->op_next;
671 CALLRUNOPS(aTHX);
672
673 abort ();
674}
675
676/* never call directly, always through the coro_state_transfer global variable */
677static void
678transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
679{
680 dSTACKLEVEL;
681
682 if (prev != next)
683 { 890 }
684 /* has this coro been created yet? */ 891}
685 if (next->mainstack) 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)
686 { 906 {
687 LOCK; 907 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
688 SAVE (prev, flags);
689 LOAD (next);
690 UNLOCK;
691
692 /* mark this state as in-use */
693 next->mainstack = 0;
694 next->tmps_ix = -2;
695
696 /* stacklevel changed? if yes, grab the stack for us! */
697 if (flags & TRANSFER_SAVE_CCTXT)
698 { 908 {
699 if (!prev->stack) 909 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
700 allocate_stack (prev, 0); 910 SV **bot, **top;
701 else if (prev->cursp != stacklevel 911 AV *av = newAV (); /* return values */
702 && prev->stack->usecnt > 1) 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)
703 { 951 {
704 prev->gencnt = ++prev->stack->gencnt; 952 SV **cb;
705 prev->stack->usecnt = 1;
706 }
707 953
708 /* has our stack been invalidated? */ 954 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
709 if (next->stack && next->stack->gencnt != next->gencnt)
710 { 955 {
711 deallocate_stack (next); 956 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
712 allocate_stack (next, 1); 957
713 coro_create (&(next->stack->cctx), 958 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
714 continue_coro, (void *)next, 959 {
715 next->stack->sptr, labs (next->stack->ssize)); 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;
716 } 986 }
717 987
718 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 988 if (cctx->flags & CC_TRACE_LINE)
719 prev->cursp = stacklevel;
720 /* don't add any code here */
721 }
722 else
723 next->cursp = stacklevel;
724 }
725 else if (next->tmps_ix == -2)
726 croak ("tried to transfer to running coroutine");
727 else
728 {
729 LOCK;
730 SAVE (prev, -1); /* first get rid of the old state */
731 UNLOCK;
732
733 /* create the coroutine for the first time */
734 if (flags & TRANSFER_SAVE_CCTXT)
735 {
736 if (!prev->stack)
737 allocate_stack (prev, 0);
738
739 /* the new coroutine starts with start_env again */
740 PL_top_env = &PL_start_env;
741
742 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
743 { 989 {
744 setup_coro (next); 990 dSP;
745 next->cursp = stacklevel;
746 991
747 prev->stack->refcnt++; 992 PL_runops = RUNOPS_DEFAULT;
748 prev->stack->usecnt++; 993 ENTER;
749 next->stack = prev->stack; 994 SAVETMPS;
750 next->gencnt = prev->gencnt; 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;
751 } 1007 }
752 else
753 {
754 assert (!next->stack);
755 allocate_stack (next, 1);
756 coro_create (&(next->stack->cctx),
757 setup_coro, (void *)next,
758 next->stack->sptr, labs (next->stack->ssize));
759 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
760 prev->cursp = stacklevel;
761 /* don't add any code here */
762 } 1008 }
763 } 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{
1023 dSP;
1024 LOGOP myop;
1025
1026 PL_top_env = &PL_start_env;
1027
1028 if (cctx->flags & CC_TRACE)
1029 PL_runops = runops_trace;
1030
1031 Zero (&myop, 1, LOGOP);
1032 myop.op_next = PL_op;
1033 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
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;
1040 PL_op = (OP *)&myop;
1041 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1042 SPAGAIN;
1043}
1044
1045/*
1046 * this is a _very_ stripped down perl interpreter ;)
1047 */
1048static void
1049cctx_run (void *arg)
1050{
1051 dTHX;
1052
1053 /* cctx_run is the alternative tail of transfer(), so unlock here. */
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
1086 Newz (0, cctx, 1, coro_cctx);
1087
1088#if HAVE_MMAP
1089 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1090 /* mmap supposedly does allocate-on-write for us */
1091 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1092
1093 if (cctx->sptr != (void *)-1)
1094 {
1095# if CORO_STACKGUARD
1096 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1097# endif
1098 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1099 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1100 cctx->flags |= CC_MAPPED;
1101 }
1102 else
1103#endif
1104 {
1105 cctx->ssize = coro_stacksize * (long)sizeof (long);
1106 New (0, cctx->sptr, coro_stacksize, long);
1107
1108 if (!cctx->sptr)
1109 {
1110 perror ("FATAL: unable to allocate stack for coroutine");
1111 _exit (EXIT_FAILURE);
1112 }
1113
1114 stack_start = cctx->sptr;
1115 stack_size = cctx->ssize;
1116 }
1117
1118 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1119 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1120
1121 return cctx;
1122}
1123
1124static void
1125cctx_destroy (coro_cctx *cctx)
1126{
1127 if (!cctx)
1128 return;
1129
1130 --cctx_count;
1131
1132#if CORO_USE_VALGRIND
1133 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1134#endif
1135
1136#if HAVE_MMAP
1137 if (cctx->flags & CC_MAPPED)
1138 munmap (cctx->sptr, cctx->ssize);
1139 else
1140#endif
1141 Safefree (cctx->sptr);
1142
1143 Safefree (cctx);
1144}
1145
1146/* wether this cctx should be destructed */
1147#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1148
1149static coro_cctx *
1150cctx_get (pTHX)
1151{
1152 while (expect_true (cctx_first))
1153 {
1154 coro_cctx *cctx = cctx_first;
1155 cctx_first = cctx->next;
1156 --cctx_idle;
1157
1158 if (expect_true (!CCTX_EXPIRED (cctx)))
1159 return cctx;
1160
1161 cctx_destroy (cctx);
1162 }
1163
1164 return cctx_new ();
1165}
1166
1167static void
1168cctx_put (coro_cctx *cctx)
1169{
1170 /* free another cctx if overlimit */
1171 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1172 {
1173 coro_cctx *first = cctx_first;
1174 cctx_first = first->next;
1175 --cctx_idle;
1176
1177 cctx_destroy (first);
1178 }
1179
1180 ++cctx_idle;
1181 cctx->next = cctx_first;
1182 cctx_first = cctx;
1183}
1184
1185/** coroutine switching *****************************************************/
1186
1187static void
1188transfer_check (pTHX_ struct coro *prev, struct coro *next)
1189{
1190 if (expect_true (prev != next))
1191 {
1192 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1193 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1194
1195 if (expect_false (next->flags & CF_RUNNING))
1196 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1197
1198 if (expect_false (next->flags & CF_DESTROYED))
1199 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1200
1201#if !PERL_VERSION_ATLEAST (5,10,0)
1202 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1203 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1204#endif
1205 }
1206}
1207
1208/* always use the TRANSFER macro */
1209static void NOINLINE
1210transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1211{
1212 dSTACKLEVEL;
1213 static volatile int has_throw;
1214
1215 /* sometimes transfer is only called to set idle_sp */
1216 if (expect_false (!next))
1217 {
1218 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1219 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1220 }
1221 else if (expect_true (prev != next))
1222 {
1223 coro_cctx *prev__cctx;
1224
1225 if (expect_false (prev->flags & CF_NEW))
1226 {
1227 /* create a new empty context */
1228 Newz (0, prev->cctx, 1, coro_cctx);
1229 prev->flags &= ~CF_NEW;
1230 prev->flags |= CF_RUNNING;
1231 }
1232
1233 prev->flags &= ~CF_RUNNING;
1234 next->flags |= CF_RUNNING;
1235
1236 LOCK;
1237
1238 /* first get rid of the old state */
1239 save_perl (aTHX_ prev);
1240
1241 if (expect_false (next->flags & CF_NEW))
1242 {
1243 /* need to start coroutine */
1244 next->flags &= ~CF_NEW;
1245 /* setup coroutine call */
1246 coro_setup (aTHX_ next);
1247 }
764 else 1248 else
1249 load_perl (aTHX_ next);
1250
1251 prev__cctx = prev->cctx;
1252
1253 /* possibly "free" the cctx */
1254 if (expect_true (
1255 prev__cctx->idle_sp == STACKLEVEL
1256 && !(prev__cctx->flags & CC_TRACE)
1257 && !force_cctx
1258 ))
1259 {
1260 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1261 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1262
1263 prev->cctx = 0;
1264
1265 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1266 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1267 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1268 if (!next->cctx)
1269 next->cctx = cctx_get (aTHX);
1270
1271 cctx_put (prev__cctx);
1272 }
1273
1274 ++next->usecount;
1275
1276 if (expect_true (!next->cctx))
1277 next->cctx = cctx_get (aTHX);
1278
1279 has_throw = !!next->throw;
1280
1281 if (expect_false (prev__cctx != next->cctx))
1282 {
1283 prev__cctx->top_env = PL_top_env;
1284 PL_top_env = next->cctx->top_env;
1285 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1286 }
1287
1288 free_coro_mortal (aTHX);
1289 UNLOCK;
1290
1291 if (expect_false (has_throw))
1292 {
1293 struct coro *coro = SvSTATE (coro_current);
1294
1295 if (coro->throw)
765 { 1296 {
1297 SV *exception = coro->throw;
1298 coro->throw = 0;
1299 sv_setsv (ERRSV, exception);
766 setup_coro (next); 1300 croak (0);
767 next->cursp = stacklevel;
768 } 1301 }
769 } 1302 }
770 } 1303 }
771
772 LOCK;
773 if (coro_mortal)
774 {
775 SvREFCNT_dec (coro_mortal);
776 coro_mortal = 0;
777 }
778 UNLOCK;
779} 1304}
780 1305
781/* use this function pointer to call the above function */ 1306struct transfer_args
782/* this is done to increase chances of the compiler not inlining the call */ 1307{
783void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl; 1308 struct coro *prev, *next;
1309};
784 1310
785#define SV_CORO(sv,func) \ 1311#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
786 do { \ 1312#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
787 if (SvROK (sv)) \
788 sv = SvRV (sv); \
789 \
790 if (SvTYPE (sv) == SVt_PVHV && SvSTASH (sv) != coro_state_stash) \
791 { \
792 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
793 \
794 if (!he) \
795 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
796 \
797 (sv) = SvRV (HeVAL(he)); \
798 } \
799 \
800 /* must also be changed inside Coro::Cont::yield */ \
801 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
802 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
803 \
804 } while(0)
805 1313
1314/** high level stuff ********************************************************/
1315
806static void 1316static int
807coro_state_destroy (struct coro *coro) 1317coro_state_destroy (pTHX_ struct coro *coro)
808{ 1318{
809 if (coro->refcnt--) 1319 if (coro->flags & CF_DESTROYED)
810 return; 1320 return 0;
1321
1322 coro->flags |= CF_DESTROYED;
1323
1324 if (coro->flags & CF_READY)
1325 {
1326 /* reduce nready, as destroying a ready coro effectively unreadies it */
1327 /* alternative: look through all ready queues and remove the coro */
1328 LOCK;
1329 --coro_nready;
1330 UNLOCK;
1331 }
1332 else
1333 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
811 1334
812 if (coro->mainstack && coro->mainstack != main_mainstack) 1335 if (coro->mainstack && coro->mainstack != main_mainstack)
813 { 1336 {
814 struct coro temp; 1337 struct coro temp;
815 1338
816 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1339 if (coro->flags & CF_RUNNING)
1340 croak ("FATAL: tried to destroy currently running coroutine");
1341
1342 save_perl (aTHX_ &temp);
817 LOAD (aTHX_ coro); 1343 load_perl (aTHX_ coro);
818 1344
819 destroy_stacks (aTHX); 1345 coro_destroy (aTHX_ coro);
820 1346
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1347 load_perl (aTHX_ &temp);
822 1348
823 coro->mainstack = 0; 1349 coro->slot = 0;
824 } 1350 }
825 1351
826 deallocate_stack (coro); 1352 cctx_destroy (coro->cctx);
827 SvREFCNT_dec (coro->args); 1353 SvREFCNT_dec (coro->args);
828 Safefree (coro); 1354
1355 if (coro->next) coro->next->prev = coro->prev;
1356 if (coro->prev) coro->prev->next = coro->next;
1357 if (coro == coro_first) coro_first = coro->next;
1358
1359 return 1;
829} 1360}
830 1361
831static int 1362static int
832coro_state_clear (SV *sv, MAGIC *mg) 1363coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833{ 1364{
834 struct coro *coro = (struct coro *)mg->mg_ptr; 1365 struct coro *coro = (struct coro *)mg->mg_ptr;
835 mg->mg_ptr = 0; 1366 mg->mg_ptr = 0;
836 1367
1368 coro->hv = 0;
1369
1370 if (--coro->refcnt < 0)
1371 {
837 coro_state_destroy (coro); 1372 coro_state_destroy (aTHX_ coro);
1373 Safefree (coro);
1374 }
838 1375
839 return 0; 1376 return 0;
840} 1377}
841 1378
842static int 1379static int
843coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1380coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
844{ 1381{
845 struct coro *coro = (struct coro *)mg->mg_ptr; 1382 struct coro *coro = (struct coro *)mg->mg_ptr;
846 1383
847 ++coro->refcnt; 1384 ++coro->refcnt;
848 1385
849 return 0; 1386 return 0;
850} 1387}
851 1388
852static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1389static MGVTBL coro_state_vtbl = {
853 1390 0, 0, 0, 0,
854static struct coro * 1391 coro_state_free,
855SvSTATE (SV *coro) 1392 0,
856{ 1393#ifdef MGf_DUP
857 MAGIC *mg = SvMAGIC (SvROK (coro) ? SvRV (coro) : coro); 1394 coro_state_dup,
858 assert (mg->mg_type == PERL_MAGIC_ext); 1395#else
859 return (struct coro *)mg->mg_ptr; 1396# define MGf_DUP 0
860} 1397#endif
1398};
861 1399
862static void 1400static void
1401prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1402{
1403 ta->prev = SvSTATE (prev_sv);
1404 ta->next = SvSTATE (next_sv);
1405 TRANSFER_CHECK (*ta);
1406}
1407
1408static void
863api_transfer (pTHX_ SV *prev, SV *next, int flags) 1409api_transfer (SV *prev_sv, SV *next_sv)
864{ 1410{
865 SV_CORO (prev, "Coro::transfer"); 1411 dTHX;
866 SV_CORO (next, "Coro::transfer"); 1412 struct transfer_args ta;
867 1413
868 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1414 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1415 TRANSFER (ta, 1);
869} 1416}
870 1417
871/** Coro ********************************************************************/ 1418/** Coro ********************************************************************/
872 1419
873#define PRIO_MAX 3
874#define PRIO_HIGH 1
875#define PRIO_NORMAL 0
876#define PRIO_LOW -1
877#define PRIO_IDLE -3
878#define PRIO_MIN -4
879
880/* for Coro.pm */
881static GV *coro_current, *coro_idle;
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883static int coro_nready;
884
885static void 1420static void
886coro_enq (pTHX_ SV *sv) 1421coro_enq (pTHX_ SV *coro_sv)
1422{
1423 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1424}
1425
1426static SV *
1427coro_deq (pTHX)
887{ 1428{
888 int prio; 1429 int prio;
889 1430
890 if (SvTYPE (sv) != SVt_PVHV)
891 croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893 {
894 SV *coro = sv;
895 SV_CORO (coro, "omg");
896 prio = SvSTATE (coro)->prio;
897 }
898
899 av_push (coro_ready [prio - PRIO_MIN], sv);
900 coro_nready++;
901}
902
903static SV *
904coro_deq (pTHX_ int min_prio)
905{
906 int prio = PRIO_MAX - PRIO_MIN;
907
908 min_prio -= PRIO_MIN;
909 if (min_prio < 0)
910 min_prio = 0;
911
912 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1431 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
913 if (AvFILLp (coro_ready [prio]) >= 0) 1432 if (AvFILLp (coro_ready [prio]) >= 0)
914 {
915 coro_nready--;
916 return av_shift (coro_ready [prio]); 1433 return av_shift (coro_ready [prio]);
917 }
918 1434
919 return 0; 1435 return 0;
920} 1436}
921 1437
1438static int
1439api_ready (SV *coro_sv)
1440{
1441 dTHX;
1442 struct coro *coro;
1443 SV *sv_hook;
1444 void (*xs_hook)(void);
1445
1446 if (SvROK (coro_sv))
1447 coro_sv = SvRV (coro_sv);
1448
1449 coro = SvSTATE (coro_sv);
1450
1451 if (coro->flags & CF_READY)
1452 return 0;
1453
1454 coro->flags |= CF_READY;
1455
1456 LOCK;
1457
1458 sv_hook = coro_nready ? 0 : coro_readyhook;
1459 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1460
1461 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1462 ++coro_nready;
1463
1464 UNLOCK;
1465
1466 if (sv_hook)
1467 {
1468 dSP;
1469
1470 ENTER;
1471 SAVETMPS;
1472
1473 PUSHMARK (SP);
1474 PUTBACK;
1475 call_sv (sv_hook, G_DISCARD);
1476 SPAGAIN;
1477
1478 FREETMPS;
1479 LEAVE;
1480 }
1481
1482 if (xs_hook)
1483 xs_hook ();
1484
1485 return 1;
1486}
1487
1488static int
1489api_is_ready (SV *coro_sv)
1490{
1491 dTHX;
1492 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1493}
1494
922static void 1495static void
923api_ready (SV *coro) 1496prepare_schedule (pTHX_ struct transfer_args *ta)
924{ 1497{
925 dTHX; 1498 SV *prev_sv, *next_sv;
926 1499
927 if (SvROK (coro)) 1500 for (;;)
928 coro = SvRV (coro); 1501 {
1502 LOCK;
1503 next_sv = coro_deq (aTHX);
1504
1505 /* nothing to schedule: call the idle handler */
1506 if (expect_false (!next_sv))
1507 {
1508 dSP;
1509 UNLOCK;
1510
1511 ENTER;
1512 SAVETMPS;
1513
1514 PUSHMARK (SP);
1515 PUTBACK;
1516 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1517 SPAGAIN;
1518
1519 FREETMPS;
1520 LEAVE;
1521 continue;
1522 }
1523
1524 ta->next = SvSTATE (next_sv);
1525
1526 /* cannot transfer to destroyed coros, skip and look for next */
1527 if (expect_false (ta->next->flags & CF_DESTROYED))
1528 {
1529 UNLOCK;
1530 SvREFCNT_dec (next_sv);
1531 /* coro_nready is already taken care of by destroy */
1532 continue;
1533 }
1534
1535 --coro_nready;
1536 UNLOCK;
1537 break;
1538 }
1539
1540 /* free this only after the transfer */
1541 prev_sv = SvRV (coro_current);
1542 ta->prev = SvSTATE (prev_sv);
1543 TRANSFER_CHECK (*ta);
1544 assert (ta->next->flags & CF_READY);
1545 ta->next->flags &= ~CF_READY;
1546 SvRV_set (coro_current, next_sv);
929 1547
930 LOCK; 1548 LOCK;
931 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1549 free_coro_mortal (aTHX);
1550 coro_mortal = prev_sv;
932 UNLOCK; 1551 UNLOCK;
1552}
1553
1554static void
1555prepare_cede (pTHX_ struct transfer_args *ta)
1556{
1557 api_ready (coro_current);
1558 prepare_schedule (aTHX_ ta);
1559}
1560
1561static int
1562prepare_cede_notself (pTHX_ struct transfer_args *ta)
1563{
1564 if (coro_nready)
1565 {
1566 SV *prev = SvRV (coro_current);
1567 prepare_schedule (aTHX_ ta);
1568 api_ready (prev);
1569 return 1;
1570 }
1571 else
1572 return 0;
933} 1573}
934 1574
935static void 1575static void
936api_schedule (void) 1576api_schedule (void)
937{ 1577{
938 dTHX; 1578 dTHX;
1579 struct transfer_args ta;
939 1580
940 SV *prev, *next; 1581 prepare_schedule (aTHX_ &ta);
1582 TRANSFER (ta, 1);
1583}
941 1584
942 LOCK; 1585static int
1586api_cede (void)
1587{
1588 dTHX;
1589 struct transfer_args ta;
943 1590
944 prev = SvRV (GvSV (coro_current)); 1591 prepare_cede (aTHX_ &ta);
945 next = coro_deq (aTHX_ PRIO_MIN);
946 1592
947 if (!next) 1593 if (expect_true (ta.prev != ta.next))
948 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1594 {
1595 TRANSFER (ta, 1);
1596 return 1;
1597 }
1598 else
1599 return 0;
1600}
949 1601
950 /* free this only after the transfer */ 1602static int
951 coro_mortal = prev; 1603api_cede_notself (void)
952 SV_CORO (prev, "Coro::schedule"); 1604{
1605 dTHX;
1606 struct transfer_args ta;
953 1607
954 SvRV (GvSV (coro_current)) = next; 1608 if (prepare_cede_notself (aTHX_ &ta))
955 1609 {
956 SV_CORO (next, "Coro::schedule"); 1610 TRANSFER (ta, 1);
957 1611 return 1;
958 UNLOCK; 1612 }
959 1613 else
960 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1614 return 0;
961 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
962} 1615}
963 1616
964static void 1617static void
965api_cede (void) 1618api_trace (SV *coro_sv, int flags)
966{ 1619{
967 dTHX; 1620 dTHX;
1621 struct coro *coro = SvSTATE (coro_sv);
968 1622
969 LOCK; 1623 if (flags & CC_TRACE)
970 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1624 {
971 UNLOCK; 1625 if (!coro->cctx)
1626 coro->cctx = cctx_new ();
1627 else if (!(coro->cctx->flags & CC_TRACE))
1628 croak ("cannot enable tracing on coroutine with custom stack");
972 1629
1630 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1631 }
1632 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1633 {
1634 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1635
1636 if (coro->flags & CF_RUNNING)
1637 PL_runops = RUNOPS_DEFAULT;
1638 else
1639 coro->slot->runops = RUNOPS_DEFAULT;
1640 }
1641}
1642
1643static int
1644coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1645{
1646 AV *padlist;
1647 AV *av = (AV *)mg->mg_obj;
1648
1649 abort ();
1650
1651 return 0;
1652}
1653
1654static MGVTBL coro_gensub_vtbl = {
1655 0, 0, 0, 0,
1656 coro_gensub_free
1657};
1658
1659/*****************************************************************************/
1660/* PerlIO::cede */
1661
1662typedef struct
1663{
1664 PerlIOBuf base;
1665 NV next, every;
1666} PerlIOCede;
1667
1668static IV
1669PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1670{
1671 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1672
1673 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1674 self->next = nvtime () + self->every;
1675
1676 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1677}
1678
1679static SV *
1680PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1681{
1682 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1683
1684 return newSVnv (self->every);
1685}
1686
1687static IV
1688PerlIOCede_flush (pTHX_ PerlIO *f)
1689{
1690 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1691 double now = nvtime ();
1692
1693 if (now >= self->next)
1694 {
973 api_schedule (); 1695 api_cede ();
974} 1696 self->next = now + self->every;
1697 }
975 1698
1699 return PerlIOBuf_flush (aTHX_ f);
1700}
1701
1702static PerlIO_funcs PerlIO_cede =
1703{
1704 sizeof(PerlIO_funcs),
1705 "cede",
1706 sizeof(PerlIOCede),
1707 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1708 PerlIOCede_pushed,
1709 PerlIOBuf_popped,
1710 PerlIOBuf_open,
1711 PerlIOBase_binmode,
1712 PerlIOCede_getarg,
1713 PerlIOBase_fileno,
1714 PerlIOBuf_dup,
1715 PerlIOBuf_read,
1716 PerlIOBuf_unread,
1717 PerlIOBuf_write,
1718 PerlIOBuf_seek,
1719 PerlIOBuf_tell,
1720 PerlIOBuf_close,
1721 PerlIOCede_flush,
1722 PerlIOBuf_fill,
1723 PerlIOBase_eof,
1724 PerlIOBase_error,
1725 PerlIOBase_clearerr,
1726 PerlIOBase_setlinebuf,
1727 PerlIOBuf_get_base,
1728 PerlIOBuf_bufsiz,
1729 PerlIOBuf_get_ptr,
1730 PerlIOBuf_get_cnt,
1731 PerlIOBuf_set_ptrcnt,
1732};
1733
1734
976MODULE = Coro::State PACKAGE = Coro::State 1735MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977 1736
978PROTOTYPES: DISABLE 1737PROTOTYPES: DISABLE
979 1738
980BOOT: 1739BOOT:
981{ /* {} necessary for stoopid perl-5.6.x */ 1740{
982#ifdef USE_ITHREADS 1741#ifdef USE_ITHREADS
983 MUTEX_INIT (&coro_mutex); 1742 MUTEX_INIT (&coro_mutex);
984#endif 1743#endif
985 BOOT_PAGESIZE; 1744 BOOT_PAGESIZE;
986 1745
987 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1746 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
988 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1747 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1748
1749 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1750 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1751 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1752
1753 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1754 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1755 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1756
989 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1757 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
990 1758
991 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1759 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
992 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1760 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
993 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1761 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
994 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1762 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
995 1763
996 main_mainstack = PL_mainstack; 1764 main_mainstack = PL_mainstack;
1765 main_top_env = PL_top_env;
997 1766
1767 while (main_top_env->je_prev)
1768 main_top_env = main_top_env->je_prev;
1769
998 coroapi.ver = CORO_API_VERSION; 1770 coroapi.ver = CORO_API_VERSION;
1771 coroapi.rev = CORO_API_REVISION;
999 coroapi.transfer = api_transfer; 1772 coroapi.transfer = api_transfer;
1773
1774 {
1775 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
1776
1777 if (!svp) croak ("Time::HiRes is required");
1778 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1779
1780 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1781 }
1000 1782
1001 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1783 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1002} 1784}
1003 1785
1004SV * 1786SV *
1005new (char *klass, ...) 1787new (char *klass, ...)
1006 CODE: 1788 CODE:
1007{ 1789{
1008 struct coro *coro; 1790 struct coro *coro;
1791 MAGIC *mg;
1009 HV *hv; 1792 HV *hv;
1010 int i; 1793 int i;
1011 1794
1012 Newz (0, coro, 1, struct coro); 1795 Newz (0, coro, 1, struct coro);
1013 coro->args = newAV (); 1796 coro->args = newAV ();
1797 coro->flags = CF_NEW;
1014 1798
1799 if (coro_first) coro_first->prev = coro;
1800 coro->next = coro_first;
1801 coro_first = coro;
1802
1803 coro->hv = hv = newHV ();
1804 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1805 mg->mg_flags |= MGf_DUP;
1806 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1807
1808 av_extend (coro->args, items - 1);
1015 for (i = 1; i < items; i++) 1809 for (i = 1; i < items; i++)
1016 av_push (coro->args, newSVsv (ST (i))); 1810 av_push (coro->args, newSVsv (ST (i)));
1017
1018 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1019 /*coro->stack = 0;*/
1020
1021 hv = newHV ();
1022 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1023 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1024} 1811}
1025 OUTPUT: 1812 OUTPUT:
1026 RETVAL 1813 RETVAL
1027 1814
1815# these not obviously related functions are all rolled into the same xs
1816# function to increase chances that they all will call transfer with the same
1817# stack offset
1028void 1818void
1029transfer(prev, next, flags) 1819_set_stacklevel (...)
1030 SV *prev 1820 ALIAS:
1031 SV *next 1821 Coro::State::transfer = 1
1032 int flags 1822 Coro::schedule = 2
1823 Coro::cede = 3
1824 Coro::cede_notself = 4
1033 CODE: 1825 CODE:
1826{
1827 struct transfer_args ta;
1828
1034 PUTBACK; 1829 PUTBACK;
1035 SV_CORO (next, "Coro::transfer"); 1830 switch (ix)
1036 SV_CORO (prev, "Coro::transfer"); 1831 {
1037 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1832 case 0:
1833 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1834 ta.next = 0;
1835 break;
1836
1837 case 1:
1838 if (items != 2)
1839 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1840
1841 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1842 break;
1843
1844 case 2:
1845 prepare_schedule (aTHX_ &ta);
1846 break;
1847
1848 case 3:
1849 prepare_cede (aTHX_ &ta);
1850 break;
1851
1852 case 4:
1853 if (!prepare_cede_notself (aTHX_ &ta))
1854 XSRETURN_EMPTY;
1855
1856 break;
1857 }
1038 SPAGAIN; 1858 SPAGAIN;
1859
1860 BARRIER;
1861 PUTBACK;
1862 TRANSFER (ta, 0);
1863 SPAGAIN; /* might be the sp of a different coroutine now */
1864 /* be extra careful not to ever do anything after TRANSFER */
1865}
1866
1867bool
1868_destroy (SV *coro_sv)
1869 CODE:
1870 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1871 OUTPUT:
1872 RETVAL
1873
1874void
1875_exit (int code)
1876 PROTOTYPE: $
1877 CODE:
1878 _exit (code);
1879
1880int
1881cctx_stacksize (int new_stacksize = 0)
1882 CODE:
1883 RETVAL = coro_stacksize;
1884 if (new_stacksize)
1885 coro_stacksize = new_stacksize;
1886 OUTPUT:
1887 RETVAL
1888
1889int
1890cctx_count ()
1891 CODE:
1892 RETVAL = cctx_count;
1893 OUTPUT:
1894 RETVAL
1895
1896int
1897cctx_idle ()
1898 CODE:
1899 RETVAL = cctx_idle;
1900 OUTPUT:
1901 RETVAL
1902
1903void
1904list ()
1905 PPCODE:
1906{
1907 struct coro *coro;
1908 for (coro = coro_first; coro; coro = coro->next)
1909 if (coro->hv)
1910 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1911}
1912
1913void
1914call (Coro::State coro, SV *coderef)
1915 ALIAS:
1916 eval = 1
1917 CODE:
1918{
1919 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
1920 {
1921 struct coro temp;
1922
1923 if (!(coro->flags & CF_RUNNING))
1924 {
1925 PUTBACK;
1926 save_perl (aTHX_ &temp);
1927 load_perl (aTHX_ coro);
1928 }
1929
1930 {
1931 dSP;
1932 ENTER;
1933 SAVETMPS;
1934 PUTBACK;
1935 PUSHSTACK;
1936 PUSHMARK (SP);
1937
1938 if (ix)
1939 eval_sv (coderef, 0);
1940 else
1941 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1942
1943 POPSTACK;
1944 SPAGAIN;
1945 FREETMPS;
1946 LEAVE;
1947 PUTBACK;
1948 }
1949
1950 if (!(coro->flags & CF_RUNNING))
1951 {
1952 save_perl (aTHX_ coro);
1953 load_perl (aTHX_ &temp);
1954 SPAGAIN;
1955 }
1956 }
1957}
1958
1959SV *
1960is_ready (Coro::State coro)
1961 PROTOTYPE: $
1962 ALIAS:
1963 is_ready = CF_READY
1964 is_running = CF_RUNNING
1965 is_new = CF_NEW
1966 is_destroyed = CF_DESTROYED
1967 CODE:
1968 RETVAL = boolSV (coro->flags & ix);
1969 OUTPUT:
1970 RETVAL
1971
1972void
1973api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1974
1975SV *
1976has_cctx (Coro::State coro)
1977 PROTOTYPE: $
1978 CODE:
1979 RETVAL = boolSV (!!coro->cctx);
1980 OUTPUT:
1981 RETVAL
1982
1983int
1984is_traced (Coro::State coro)
1985 PROTOTYPE: $
1986 CODE:
1987 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1988 OUTPUT:
1989 RETVAL
1990
1991IV
1992rss (Coro::State coro)
1993 PROTOTYPE: $
1994 ALIAS:
1995 usecount = 1
1996 CODE:
1997 switch (ix)
1998 {
1999 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2000 case 1: RETVAL = coro->usecount; break;
2001 }
2002 OUTPUT:
2003 RETVAL
2004
2005void
2006force_cctx ()
2007 CODE:
2008 struct coro *coro = SvSTATE (coro_current);
2009 coro->cctx->idle_sp = 0;
2010
2011void
2012throw (Coro::State self, SV *throw = &PL_sv_undef)
2013 PROTOTYPE: $;$
2014 CODE:
2015 SvREFCNT_dec (self->throw);
2016 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2017
2018void
2019swap_defsv (Coro::State self)
2020 PROTOTYPE: $
2021 ALIAS:
2022 swap_defav = 1
2023 CODE:
2024 if (!self->slot)
2025 croak ("cannot swap state with coroutine that has no saved state");
2026 else
2027 {
2028 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2029 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2030
2031 SV *tmp = *src; *src = *dst; *dst = tmp;
2032 }
2033
2034MODULE = Coro::State PACKAGE = Coro
2035
2036BOOT:
2037{
2038 int i;
2039
2040 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2041 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2042 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2043
2044 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2045 SvREADONLY_on (coro_current);
2046
2047 coro_stash = gv_stashpv ("Coro", TRUE);
2048
2049 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2050 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2051 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2052 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2053 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2054 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2055
2056 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2057 coro_ready[i] = newAV ();
2058
2059 {
2060 SV *sv = perl_get_sv ("Coro::API", TRUE);
2061 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2062
2063 coroapi.schedule = api_schedule;
2064 coroapi.cede = api_cede;
2065 coroapi.cede_notself = api_cede_notself;
2066 coroapi.ready = api_ready;
2067 coroapi.is_ready = api_is_ready;
2068 coroapi.nready = &coro_nready;
2069 coroapi.current = coro_current;
2070
2071 GCoroAPI = &coroapi;
2072 sv_setiv (sv, (IV)&coroapi);
2073 SvREADONLY_on (sv);
2074 }
2075}
2076
2077void
2078_set_current (SV *current)
2079 PROTOTYPE: $
2080 CODE:
2081 SvREFCNT_dec (SvRV (coro_current));
2082 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2083
2084void
2085_set_readyhook (SV *hook)
2086 PROTOTYPE: $
2087 CODE:
2088 LOCK;
2089 SvREFCNT_dec (coro_readyhook);
2090 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2091 UNLOCK;
1039 2092
1040int 2093int
1041prio (Coro::State coro, int newprio = 0) 2094prio (Coro::State coro, int newprio = 0)
1042 ALIAS: 2095 ALIAS:
1043 nice = 1 2096 nice = 1
… …
1046 RETVAL = coro->prio; 2099 RETVAL = coro->prio;
1047 2100
1048 if (items > 1) 2101 if (items > 1)
1049 { 2102 {
1050 if (ix) 2103 if (ix)
1051 newprio += coro->prio; 2104 newprio = coro->prio - newprio;
1052 2105
1053 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2106 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1054 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2107 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1055 2108
1056 coro->prio = newprio; 2109 coro->prio = newprio;
1057 } 2110 }
1058} 2111}
2112 OUTPUT:
2113 RETVAL
1059 2114
1060void 2115SV *
1061_clone_state_from (SV *dst, SV *src) 2116ready (SV *self)
1062 CODE:
1063{
1064 struct coro *coro_src = SvSTATE (src);
1065
1066 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1067
1068 ++coro_src->refcnt;
1069 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1070}
1071
1072void
1073_exit (code)
1074 int code
1075 PROTOTYPE: $ 2117 PROTOTYPE: $
1076 CODE: 2118 CODE:
1077 _exit (code); 2119 RETVAL = boolSV (api_ready (self));
1078 2120 OUTPUT:
1079MODULE = Coro::State PACKAGE = Coro::Cont 2121 RETVAL
1080
1081void
1082yield (...)
1083 PROTOTYPE: @
1084 CODE:
1085 SV *yieldstack;
1086 SV *sv;
1087 AV *defav = GvAV (PL_defgv);
1088 struct coro *prev, *next;
1089
1090 yieldstack = *hv_fetch (
1091 (HV *)SvRV (GvSV (coro_current)),
1092 "yieldstack", sizeof ("yieldstack") - 1,
1093 0
1094 );
1095
1096 /* set up @_ -- ugly */
1097 av_clear (defav);
1098 av_fill (defav, items - 1);
1099 while (items--)
1100 av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102 sv = av_pop ((AV *)SvRV (yieldstack));
1103 prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1104 next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1105 SvREFCNT_dec (sv);
1106
1107 coro_state_transfer (aTHX_ prev, next, 0);
1108
1109MODULE = Coro::State PACKAGE = Coro
1110
1111BOOT:
1112{
1113 int i;
1114 HV *stash = gv_stashpv ("Coro", TRUE);
1115
1116 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1117 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1118 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1119 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1120 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1121 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1122
1123 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1124 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1125
1126 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1127 coro_ready[i] = newAV ();
1128
1129 {
1130 SV *sv = perl_get_sv("Coro::API", 1);
1131
1132 coroapi.schedule = api_schedule;
1133 coroapi.cede = api_cede;
1134 coroapi.ready = api_ready;
1135 coroapi.nready = &coro_nready;
1136 coroapi.current = coro_current;
1137
1138 GCoroAPI = &coroapi;
1139 sv_setiv (sv, (IV)&coroapi);
1140 SvREADONLY_on (sv);
1141 }
1142}
1143
1144#if !PERL_MICRO
1145
1146void
1147ready (self)
1148 SV * self
1149 PROTOTYPE: $
1150 CODE:
1151 api_ready (self);
1152
1153#endif
1154 2122
1155int 2123int
1156nready (...) 2124nready (...)
1157 PROTOTYPE: 2125 PROTOTYPE:
1158 CODE: 2126 CODE:
1159 RETVAL = coro_nready; 2127 RETVAL = coro_nready;
1160 OUTPUT: 2128 OUTPUT:
1161 RETVAL 2129 RETVAL
1162 2130
2131# for async_pool speedup
1163void 2132void
1164schedule (...) 2133_pool_1 (SV *cb)
1165 PROTOTYPE:
1166 CODE: 2134 CODE:
1167 api_schedule (); 2135{
2136 struct coro *coro = SvSTATE (coro_current);
2137 HV *hv = (HV *)SvRV (coro_current);
2138 AV *defav = GvAV (PL_defgv);
2139 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2140 AV *invoke_av;
2141 int i, len;
2142
2143 if (!invoke)
2144 {
2145 SV *old = PL_diehook;
2146 PL_diehook = 0;
2147 SvREFCNT_dec (old);
2148 croak ("\3async_pool terminate\2\n");
2149 }
2150
2151 SvREFCNT_dec (coro->saved_deffh);
2152 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2153
2154 hv_store (hv, "desc", sizeof ("desc") - 1,
2155 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2156
2157 invoke_av = (AV *)SvRV (invoke);
2158 len = av_len (invoke_av);
2159
2160 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2161
2162 if (len > 0)
2163 {
2164 av_fill (defav, len - 1);
2165 for (i = 0; i < len; ++i)
2166 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2167 }
2168
2169 SvREFCNT_dec (invoke);
2170}
1168 2171
1169void 2172void
1170cede (...) 2173_pool_2 (SV *cb)
1171 PROTOTYPE:
1172 CODE: 2174 CODE:
1173 api_cede (); 2175{
2176 struct coro *coro = SvSTATE (coro_current);
1174 2177
1175# and these are hacks 2178 sv_setsv (cb, &PL_sv_undef);
2179
2180 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2181 coro->saved_deffh = 0;
2182
2183 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2184 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2185 {
2186 SV *old = PL_diehook;
2187 PL_diehook = 0;
2188 SvREFCNT_dec (old);
2189 croak ("\3async_pool terminate\2\n");
2190 }
2191
2192 av_clear (GvAV (PL_defgv));
2193 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2194 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2195
2196 coro->prio = 0;
2197
2198 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2199 api_trace (coro_current, 0);
2200
2201 av_push (av_async_pool, newSVsv (coro_current));
2202}
2203
2204#if 0
2205
2206void
2207_generator_call (...)
2208 PROTOTYPE: @
2209 PPCODE:
2210 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2211 xxxx
2212 abort ();
2213
1176SV * 2214SV *
1177_aio_get_state () 2215gensub (SV *sub, ...)
1178 CODE: 2216 PROTOTYPE: &;@
2217 CODE:
1179{ 2218{
1180 struct { 2219 struct coro *coro;
1181 int errorno; 2220 MAGIC *mg;
1182 int laststype; 2221 CV *xcv;
1183 int laststatval; 2222 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1184 Stat_t statcache; 2223 int i;
1185 } data;
1186 2224
1187 data.errorno = errno; 2225 CvGV (ncv) = CvGV (cv);
1188 data.laststype = PL_laststype; 2226 CvFILE (ncv) = CvFILE (cv);
1189 data.laststatval = PL_laststatval;
1190 data.statcache = PL_statcache;
1191 2227
1192 RETVAL = newSVpvn ((char *)&data, sizeof data); 2228 Newz (0, coro, 1, struct coro);
2229 coro->args = newAV ();
2230 coro->flags = CF_NEW;
2231
2232 av_extend (coro->args, items - 1);
2233 for (i = 1; i < items; i++)
2234 av_push (coro->args, newSVsv (ST (i)));
2235
2236 CvISXSUB_on (ncv);
2237 CvXSUBANY (ncv).any_ptr = (void *)coro;
2238
2239 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2240
2241 CvXSUB (ncv) = CvXSUB (xcv);
2242 CvANON_on (ncv);
2243
2244 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2245 RETVAL = newRV_noinc ((SV *)ncv);
1193} 2246}
1194 OUTPUT: 2247 OUTPUT:
1195 RETVAL 2248 RETVAL
1196 2249
2250#endif
2251
2252
2253MODULE = Coro::State PACKAGE = Coro::AIO
2254
1197void 2255void
1198_aio_set_state (char *data_) 2256_get_state (SV *self)
2257 PPCODE:
2258{
2259 AV *defav = GvAV (PL_defgv);
2260 AV *av = newAV ();
2261 int i;
2262 SV *data_sv = newSV (sizeof (struct io_state));
2263 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2264 SvCUR_set (data_sv, sizeof (struct io_state));
2265 SvPOK_only (data_sv);
2266
2267 data->errorno = errno;
2268 data->laststype = PL_laststype;
2269 data->laststatval = PL_laststatval;
2270 data->statcache = PL_statcache;
2271
2272 av_extend (av, AvFILLp (defav) + 1 + 1);
2273
2274 for (i = 0; i <= AvFILLp (defav); ++i)
2275 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2276
2277 av_push (av, data_sv);
2278
2279 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2280
2281 api_ready (self);
2282}
2283
2284void
2285_set_state (SV *state)
1199 PROTOTYPE: $ 2286 PROTOTYPE: $
2287 PPCODE:
2288{
2289 AV *av = (AV *)SvRV (state);
2290 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2291 int i;
2292
2293 errno = data->errorno;
2294 PL_laststype = data->laststype;
2295 PL_laststatval = data->laststatval;
2296 PL_statcache = data->statcache;
2297
2298 EXTEND (SP, AvFILLp (av));
2299 for (i = 0; i < AvFILLp (av); ++i)
2300 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2301}
2302
2303
2304MODULE = Coro::State PACKAGE = Coro::AnyEvent
2305
2306BOOT:
2307 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2308
2309SV *
2310_schedule (...)
2311 PROTOTYPE: @
1200 CODE: 2312 CODE:
1201{ 2313{
1202 struct { 2314 static int incede;
1203 int errorno;
1204 int laststype;
1205 int laststatval;
1206 Stat_t statcache;
1207 } *data = (void *)data_;
1208 2315
1209 errno = data->errorno; 2316 api_cede_notself ();
1210 PL_laststype = data->laststype; 2317
1211 PL_laststatval = data->laststatval; 2318 ++incede;
1212 PL_statcache = data->statcache; 2319 while (coro_nready >= incede && api_cede ())
2320 ;
2321
2322 sv_setsv (sv_activity, &PL_sv_undef);
2323 if (coro_nready >= incede)
2324 {
2325 PUSHMARK (SP);
2326 PUTBACK;
2327 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2328 SPAGAIN;
2329 }
2330
2331 --incede;
1213} 2332}
2333
2334
2335MODULE = Coro::State PACKAGE = PerlIO::cede
2336
2337BOOT:
2338 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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