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Comparing Coro/Coro/State.xs (file contents):
Revision 1.104 by root, Mon Nov 27 01:51:02 2006 UTC vs.
Revision 1.251 by root, Thu Oct 30 09:44:31 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
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
9#if USE_VALGRIND 49#if CORO_USE_VALGRIND
10# include <valgrind/valgrind.h> 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)
11#endif 54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8
12 58
13#define PERL_VERSION_ATLEAST(a,b,c) \ 59#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \ 60 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \ 61 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \ 62 && (PERL_VERSION > (b) \
… …
35# ifndef IS_PADCONST 81# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
37# endif 83# endif
38#endif 84#endif
39 85
40#include <stdio.h> 86/* 5.11 */
41#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
42 108
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44# undef STACKGUARD 110# undef CORO_STACKGUARD
45#endif
46
47#ifndef STACKGUARD
48# define STACKGUARD 0
49#endif
50
51#ifdef HAVE_MMAP
52# include <unistd.h>
53# include <sys/mman.h>
54# ifndef MAP_ANONYMOUS
55# ifdef MAP_ANON
56# define MAP_ANONYMOUS MAP_ANON
57# else
58# undef HAVE_MMAP
59# endif
60# endif 111#endif
61# include <limits.h> 112
62# ifndef PAGESIZE 113#ifndef CORO_STACKGUARD
63# define PAGESIZE pagesize 114# define CORO_STACKGUARD 0
64# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
65static long pagesize;
66# else
67# define BOOT_PAGESIZE
68# endif 115#endif
69#endif
70 116
71/* The next macro should declare a variable stacklevel that contains and approximation 117/* prefer perl internal functions over our own? */
72 * to the current C stack pointer. Its property is that it changes with each call 118#ifndef CORO_PREFER_PERL_FUNCTIONS
73 * 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. */
74#define dSTACKLEVEL int stacklevel 124#define dSTACKLEVEL volatile char stacklevel
75#define STACKLEVEL ((void *)&stacklevel) 125#define STACKLEVEL ((void *)&stacklevel)
76 126
77#define IN_DESTRUCT (PL_main_cv == Nullcv) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
78 128
79#if __GNUC__ >= 3 129#if __GNUC__ >= 3
80# define attribute(x) __attribute__(x) 130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
81#else 133#else
82# define attribute(x) 134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
83#endif 137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
84 141
85#define NOINLINE attribute ((noinline)) 142#define NOINLINE attribute ((noinline))
86 143
87#include "CoroAPI.h" 144#include "CoroAPI.h"
88
89#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
90 145
91#ifdef USE_ITHREADS 146#ifdef USE_ITHREADS
92static perl_mutex coro_mutex; 147static perl_mutex coro_mutex;
93# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 148# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
94# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 149# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
95#else 150#else
96# define LOCK (void)0 151# define LOCK (void)0
97# define UNLOCK (void)0 152# define UNLOCK (void)0
98#endif 153#endif
99 154
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;
100static struct CoroAPI coroapi; 168static struct CoroAPI coroapi;
101static 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;
102static HV *coro_state_stash, *coro_stash; 171static HV *coro_state_stash, *coro_stash;
103static SV *coro_mortal; /* will be freed after next transfer */ 172static volatile SV *coro_mortal; /* will be freed 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};
104 199
105/* this is a structure representing a c-level coroutine */ 200/* this is a structure representing a c-level coroutine */
106typedef struct coro_stack { 201typedef struct coro_cctx {
107 struct coro_stack *next; 202 struct coro_cctx *next;
108 203
109 /* the stack */ 204 /* the stack */
110 void *sptr; 205 void *sptr;
111 long ssize; /* positive == mmap, otherwise malloc */ 206 size_t ssize;
112 207
113 /* cpu state */ 208 /* cpu state */
114 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 */
115 JMPENV *top_env; 211 JMPENV *top_env;
116 coro_context cctx; 212 coro_context cctx;
117 213
118#if USE_VALGRIND 214#if CORO_USE_VALGRIND
119 int valgrind_id; 215 int valgrind_id;
120#endif 216#endif
121} coro_stack; 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))
122 239
123/* this is a structure representing a perl-level coroutine */ 240/* this is a structure representing a perl-level coroutine */
124struct coro { 241struct coro {
125 /* the c coroutine allocated to this perl coroutine, if any */ 242 /* the c coroutine allocated to this perl coroutine, if any */
126 coro_stack *stack; 243 coro_cctx *cctx;
127 244
128 /* data associated with this coroutine (initial args) */ 245 /* process data */
129 AV *args;
130 int refcnt;
131
132 /* optionally saved, might be zero */
133 AV *defav;
134 SV *defsv;
135 SV *errsv;
136
137 /* saved global state not related to stacks */
138 U8 dowarn;
139 I32 in_eval;
140
141 /* the stacks and related info (callchain etc..) */
142 PERL_SI *curstackinfo;
143 AV *curstack;
144 AV *mainstack; 246 AV *mainstack;
145 SV **stack_sp; 247 perl_slots *slot; /* basically the saved sp */
146 OP *op; 248
147 SV **curpad; 249 AV *args; /* data associated with this coroutine (initial args) */
148 AV *comppad; 250 int refcnt; /* coroutines are refcounted, yes */
149 CV *compcv; 251 int flags; /* CF_ flags */
150 SV **stack_base; 252 HV *hv; /* the perl hash associated with this coro, if any */
151 SV **stack_max; 253
152 SV **tmps_stack; 254 /* statistics */
153 I32 tmps_floor; 255 int usecount; /* number of transfers to this coro */
154 I32 tmps_ix;
155 I32 tmps_max;
156 I32 *markstack;
157 I32 *markstack_ptr;
158 I32 *markstack_max;
159 I32 *scopestack;
160 I32 scopestack_ix;
161 I32 scopestack_max;
162 ANY *savestack;
163 I32 savestack_ix;
164 I32 savestack_max;
165 OP **retstack;
166 I32 retstack_ix;
167 I32 retstack_max;
168 PMOP *curpm;
169 COP *curcop;
170 256
171 /* coro process data */ 257 /* coro process data */
172 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;
173}; 266};
174 267
175typedef struct coro *Coro__State; 268typedef struct coro *Coro__State;
176typedef struct coro *Coro__State_or_hashref; 269typedef struct coro *Coro__State_or_hashref;
177 270
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
178static AV * 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
319static AV *
179coro_clone_padlist (CV *cv) 320coro_clone_padlist (pTHX_ CV *cv)
180{ 321{
181 AV *padlist = CvPADLIST (cv); 322 AV *padlist = CvPADLIST (cv);
182 AV *newpadlist, *newpad; 323 AV *newpadlist, *newpad;
183 324
184 newpadlist = newAV (); 325 newpadlist = newAV ();
185 AvREAL_off (newpadlist); 326 AvREAL_off (newpadlist);
186#if PERL_VERSION_ATLEAST (5,9,0) 327#if PERL_VERSION_ATLEAST (5,10,0)
187 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 328 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
188#else 329#else
189 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 330 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
190#endif 331#endif
191 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 332 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
192 --AvFILLp (padlist); 333 --AvFILLp (padlist);
193 334
194 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 335 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
195 av_store (newpadlist, 1, (SV *)newpad); 336 av_store (newpadlist, 1, (SV *)newpad);
196 337
197 return newpadlist; 338 return newpadlist;
198} 339}
199 340
200static void 341static void
201free_padlist (AV *padlist) 342free_padlist (pTHX_ AV *padlist)
202{ 343{
203 /* may be during global destruction */ 344 /* may be during global destruction */
204 if (SvREFCNT (padlist)) 345 if (SvREFCNT (padlist))
205 { 346 {
206 I32 i = AvFILLp (padlist); 347 I32 i = AvFILLp (padlist);
… …
227 AV *padlist; 368 AV *padlist;
228 AV *av = (AV *)mg->mg_obj; 369 AV *av = (AV *)mg->mg_obj;
229 370
230 /* casting is fun. */ 371 /* casting is fun. */
231 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 372 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
232 free_padlist (padlist); 373 free_padlist (aTHX_ padlist);
233 374
234 SvREFCNT_dec (av); 375 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
235 376
236 return 0; 377 return 0;
237} 378}
238 379
239#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
240 382
241static 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))
242 423
243/* the next two functions merely cache the padlists */ 424/* the next two functions merely cache the padlists */
244static void 425static void
245get_padlist (CV *cv) 426get_padlist (pTHX_ CV *cv)
246{ 427{
247 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 428 MAGIC *mg = CORO_MAGIC_cv (cv);
429 AV *av;
248 430
249 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 431 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
250 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 432 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
251 else 433 else
252 { 434 {
253#if 0 435#if CORO_PREFER_PERL_FUNCTIONS
254 /* this is probably cleaner, but also slower? */ 436 /* this is probably cleaner? but also slower! */
437 /* in practise, it seems to be less stable */
255 CV *cp = Perl_cv_clone (cv); 438 CV *cp = Perl_cv_clone (cv);
256 CvPADLIST (cv) = CvPADLIST (cp); 439 CvPADLIST (cv) = CvPADLIST (cp);
257 CvPADLIST (cp) = 0; 440 CvPADLIST (cp) = 0;
258 SvREFCNT_dec (cp); 441 SvREFCNT_dec (cp);
259#else 442#else
260 CvPADLIST (cv) = coro_clone_padlist (cv); 443 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
261#endif 444#endif
262 } 445 }
263} 446}
264 447
265static void 448static void
266put_padlist (CV *cv) 449put_padlist (pTHX_ CV *cv)
267{ 450{
268 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 451 MAGIC *mg = CORO_MAGIC_cv (cv);
452 AV *av;
269 453
270 if (!mg) 454 if (expect_false (!mg))
271 { 455 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
272 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
273 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
274 mg->mg_virtual = &vtbl_coro;
275 mg->mg_obj = (SV *)newAV ();
276 }
277 456
278 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 457 av = (AV *)mg->mg_obj;
279}
280 458
281#define SB do { 459 if (expect_false (AvFILLp (av) >= AvMAX (av)))
282#define SE } while (0) 460 av_extend (av, AvMAX (av) + 1);
283 461
284#define LOAD(state) load_state((state)); 462 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285#define SAVE(state,flags) save_state((state),(flags)); 463}
286 464
287#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 465/** load & save, init *******************************************************/
288 466
289static void 467static void
290load_state(Coro__State c) 468load_perl (pTHX_ Coro__State c)
291{ 469{
292 PL_dowarn = c->dowarn; 470 perl_slots *slot = c->slot;
293 PL_in_eval = c->in_eval; 471 c->slot = 0;
294 472
295 PL_curstackinfo = c->curstackinfo;
296 PL_curstack = c->curstack;
297 PL_mainstack = c->mainstack; 473 PL_mainstack = c->mainstack;
298 PL_stack_sp = c->stack_sp;
299 PL_op = c->op;
300 PL_curpad = c->curpad;
301 PL_comppad = c->comppad;
302 PL_compcv = c->compcv;
303 PL_stack_base = c->stack_base;
304 PL_stack_max = c->stack_max;
305 PL_tmps_stack = c->tmps_stack;
306 PL_tmps_floor = c->tmps_floor;
307 PL_tmps_ix = c->tmps_ix;
308 PL_tmps_max = c->tmps_max;
309 PL_markstack = c->markstack;
310 PL_markstack_ptr = c->markstack_ptr;
311 PL_markstack_max = c->markstack_max;
312 PL_scopestack = c->scopestack;
313 PL_scopestack_ix = c->scopestack_ix;
314 PL_scopestack_max = c->scopestack_max;
315 PL_savestack = c->savestack;
316 PL_savestack_ix = c->savestack_ix;
317 PL_savestack_max = c->savestack_max;
318#if !PERL_VERSION_ATLEAST (5,9,0)
319 PL_retstack = c->retstack;
320 PL_retstack_ix = c->retstack_ix;
321 PL_retstack_max = c->retstack_max;
322#endif
323 PL_curpm = c->curpm;
324 PL_curcop = c->curcop;
325 474
326 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 475 GvSV (PL_defgv) = slot->defsv;
327 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 476 GvAV (PL_defgv) = slot->defav;
328 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
329 483
330 { 484 {
331 dSP; 485 dSP;
486
332 CV *cv; 487 CV *cv;
333 488
334 /* now do the ugly restore mess */ 489 /* now do the ugly restore mess */
335 while ((cv = (CV *)POPs)) 490 while (expect_true (cv = (CV *)POPs))
336 { 491 {
337 AV *padlist = (AV *)POPs;
338
339 if (padlist)
340 {
341 put_padlist (cv); /* mark this padlist as available */ 492 put_padlist (aTHX_ cv); /* mark this padlist as available */
342 CvPADLIST(cv) = padlist; 493 CvDEPTH (cv) = PTR2IV (POPs);
343 } 494 CvPADLIST (cv) = (AV *)POPs;
344
345 ++CvDEPTH(cv);
346 } 495 }
347 496
348 PUTBACK; 497 PUTBACK;
349 } 498 }
350} 499}
351 500
352static void 501static void
353save_state(Coro__State c, int flags) 502save_perl (pTHX_ Coro__State c)
354{ 503{
355 { 504 {
356 dSP; 505 dSP;
357 I32 cxix = cxstack_ix; 506 I32 cxix = cxstack_ix;
358 PERL_CONTEXT *ccstk = cxstack; 507 PERL_CONTEXT *ccstk = cxstack;
… …
361 /* 510 /*
362 * 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
363 * (and reinitialize) all cv's in the whole callchain :( 512 * (and reinitialize) all cv's in the whole callchain :(
364 */ 513 */
365 514
366 PUSHs (Nullsv); 515 XPUSHs (Nullsv);
367 /* this loop was inspired by pp_caller */ 516 /* this loop was inspired by pp_caller */
368 for (;;) 517 for (;;)
369 { 518 {
370 while (cxix >= 0) 519 while (expect_true (cxix >= 0))
371 { 520 {
372 PERL_CONTEXT *cx = &ccstk[cxix--]; 521 PERL_CONTEXT *cx = &ccstk[cxix--];
373 522
374 if (CxTYPE(cx) == CXt_SUB) 523 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
375 { 524 {
376 CV *cv = cx->blk_sub.cv; 525 CV *cv = cx->blk_sub.cv;
526
377 if (CvDEPTH(cv)) 527 if (expect_true (CvDEPTH (cv)))
378 { 528 {
379 EXTEND (SP, CvDEPTH(cv)*2); 529 EXTEND (SP, 3);
380
381 while (--CvDEPTH(cv))
382 {
383 /* this tells the restore code to increment CvDEPTH */
384 PUSHs (Nullsv);
385 PUSHs ((SV *)cv);
386 }
387
388 PUSHs ((SV *)CvPADLIST(cv)); 530 PUSHs ((SV *)CvPADLIST (cv));
531 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
389 PUSHs ((SV *)cv); 532 PUSHs ((SV *)cv);
390 533
534 CvDEPTH (cv) = 0;
391 get_padlist (cv); 535 get_padlist (aTHX_ cv);
392 } 536 }
393 } 537 }
394#ifdef CXt_FORMAT
395 else if (CxTYPE(cx) == CXt_FORMAT)
396 {
397 /* I never used formats, so how should I know how these are implemented? */
398 /* my bold guess is as a simple, plain sub... */
399 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
400 }
401#endif
402 } 538 }
403 539
404 if (top_si->si_type == PERLSI_MAIN) 540 if (expect_true (top_si->si_type == PERLSI_MAIN))
405 break; 541 break;
406 542
407 top_si = top_si->si_prev; 543 top_si = top_si->si_prev;
408 ccstk = top_si->si_cxstack; 544 ccstk = top_si->si_cxstack;
409 cxix = top_si->si_cxix; 545 cxix = top_si->si_cxix;
410 } 546 }
411 547
412 PUTBACK; 548 PUTBACK;
413 } 549 }
414 550
415 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 551 /* allocate some space on the context stack for our purposes */
416 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 552 /* we manually unroll here, as usually 2 slots is enough */
417 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 */
418 562
419 c->dowarn = PL_dowarn;
420 c->in_eval = PL_in_eval;
421
422 c->curstackinfo = PL_curstackinfo;
423 c->curstack = PL_curstack;
424 c->mainstack = PL_mainstack; 563 c->mainstack = PL_mainstack;
425 c->stack_sp = PL_stack_sp; 564
426 c->op = PL_op; 565 {
427 c->curpad = PL_curpad; 566 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
428 c->comppad = PL_comppad; 567
429 c->compcv = PL_compcv; 568 slot->defav = GvAV (PL_defgv);
430 c->stack_base = PL_stack_base; 569 slot->defsv = DEFSV;
431 c->stack_max = PL_stack_max; 570 slot->errsv = ERRSV;
432 c->tmps_stack = PL_tmps_stack; 571 slot->irsgv = GvSV (irsgv);
433 c->tmps_floor = PL_tmps_floor; 572
434 c->tmps_ix = PL_tmps_ix; 573 #define VAR(name,type) slot->name = PL_ ## name;
435 c->tmps_max = PL_tmps_max; 574 # include "state.h"
436 c->markstack = PL_markstack; 575 #undef VAR
437 c->markstack_ptr = PL_markstack_ptr; 576 }
438 c->markstack_max = PL_markstack_max;
439 c->scopestack = PL_scopestack;
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445#if !PERL_VERSION_ATLEAST (5,9,0)
446 c->retstack = PL_retstack;
447 c->retstack_ix = PL_retstack_ix;
448 c->retstack_max = PL_retstack_max;
449#endif
450 c->curpm = PL_curpm;
451 c->curcop = PL_curcop;
452} 577}
453 578
454/* 579/*
455 * allocate various perl stacks. This is an exact copy 580 * allocate various perl stacks. This is an exact copy
456 * of perl.c:init_stacks, except that it uses less memory 581 * of perl.c:init_stacks, except that it uses less memory
457 * on the (sometimes correct) assumption that coroutines do 582 * on the (sometimes correct) assumption that coroutines do
458 * not usually need a lot of stackspace. 583 * not usually need a lot of stackspace.
459 */ 584 */
585#if CORO_PREFER_PERL_FUNCTIONS
586# define coro_init_stacks init_stacks
587#else
460static void 588static void
461coro_init_stacks () 589coro_init_stacks (pTHX)
462{ 590{
463 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 591 PL_curstackinfo = new_stackinfo(32, 8);
464 PL_curstackinfo->si_type = PERLSI_MAIN; 592 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 593 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 594 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 595
468 PL_stack_base = AvARRAY(PL_curstack); 596 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 597 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 598 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 599
472 New(50,PL_tmps_stack,96,SV*); 600 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 601 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 602 PL_tmps_ix = -1;
475 PL_tmps_max = 96; 603 PL_tmps_max = 32;
476 604
477 New(54,PL_markstack,16,I32); 605 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 606 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 607 PL_markstack_max = PL_markstack + 16;
480 608
481#ifdef SET_MARK_OFFSET 609#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 610 SET_MARK_OFFSET;
483#endif 611#endif
484 612
485 New(54,PL_scopestack,16,I32); 613 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 614 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 615 PL_scopestack_max = 8;
488 616
489 New(54,PL_savestack,96,ANY); 617 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 618 PL_savestack_ix = 0;
491 PL_savestack_max = 96; 619 PL_savestack_max = 24;
492 620
493#if !PERL_VERSION_ATLEAST (5,9,0) 621#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,8,OP*); 622 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 623 PL_retstack_ix = 0;
496 PL_retstack_max = 8; 624 PL_retstack_max = 4;
497#endif 625#endif
498} 626}
627#endif
499 628
500/* 629/*
501 * destroy the stacks, the callchain etc... 630 * destroy the stacks, the callchain etc...
502 */ 631 */
503static void 632static void
504coro_destroy_stacks() 633coro_destroy_stacks (pTHX)
505{ 634{
506 if (!IN_DESTRUCT)
507 {
508 /* is this ugly, I ask? */
509 LEAVE_SCOPE (0);
510
511 /* sure it is, but more important: is it correct?? :/ */
512 FREETMPS;
513
514 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
515 }
516
517 while (PL_curstackinfo->si_next) 635 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 636 PL_curstackinfo = PL_curstackinfo->si_next;
519 637
520 while (PL_curstackinfo) 638 while (PL_curstackinfo)
521 { 639 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 640 PERL_SI *p = PL_curstackinfo->si_prev;
523 641
524 { /*D*//*remove*/
525 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */
528 }
529
530 if (!IN_DESTRUCT) 642 if (!IN_DESTRUCT)
531 {
532 dounwind (-1);/*D*//*remove*/
533 SvREFCNT_dec (PL_curstackinfo->si_stack); 643 SvREFCNT_dec (PL_curstackinfo->si_stack);
534 }
535 644
536 Safefree (PL_curstackinfo->si_cxstack); 645 Safefree (PL_curstackinfo->si_cxstack);
537 Safefree (PL_curstackinfo); 646 Safefree (PL_curstackinfo);
538 PL_curstackinfo = p; 647 PL_curstackinfo = p;
539 } 648 }
540 649
541 Safefree (PL_tmps_stack); 650 Safefree (PL_tmps_stack);
542 Safefree (PL_markstack); 651 Safefree (PL_markstack);
543 Safefree (PL_scopestack); 652 Safefree (PL_scopestack);
544 Safefree (PL_savestack); 653 Safefree (PL_savestack);
545#if !PERL_VERSION_ATLEAST (5,9,0) 654#if !PERL_VERSION_ATLEAST (5,10,0)
546 Safefree (PL_retstack); 655 Safefree (PL_retstack);
547#endif 656#endif
548} 657}
549 658
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
550static void 791static void
551setup_coro (struct coro *coro) 792coro_setup (pTHX_ struct coro *coro)
552{ 793{
553 /* 794 /*
554 * emulate part of the perl startup here. 795 * emulate part of the perl startup here.
555 */ 796 */
556
557 coro_init_stacks (); 797 coro_init_stacks (aTHX);
558 798
799 PL_runops = RUNOPS_DEFAULT;
800 PL_curcop = &PL_compiling;
801 PL_in_eval = EVAL_NULL;
559 PL_curcop = 0; 802 PL_comppad = 0;
560 PL_in_eval = 0;
561 PL_curpm = 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);
562 822
563 { 823 {
564 dSP; 824 dSP;
565 LOGOP myop; 825 LOGOP myop;
566 826
567 /* I have no idea why this is needed, but it is */
568 PUSHMARK (SP);
569
570 SvREFCNT_dec (GvAV (PL_defgv));
571 GvAV (PL_defgv) = coro->args; coro->args = 0;
572
573 Zero (&myop, 1, LOGOP); 827 Zero (&myop, 1, LOGOP);
574 myop.op_next = Nullop; 828 myop.op_next = Nullop;
575 myop.op_flags = OPf_WANT_VOID; 829 myop.op_flags = OPf_WANT_VOID;
576 830
831 PUSHMARK (SP);
832 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
833 PUTBACK;
577 PL_op = (OP *)&myop; 834 PL_op = (OP *)&myop;
578
579 PUSHMARK (SP);
580 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
581 PUTBACK;
582 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 835 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
583 SPAGAIN; 836 SPAGAIN;
584
585 ENTER; /* necessary e.g. for dounwind */
586 } 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;
587} 845}
588 846
589static void 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));
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_destroy_stacks (aTHX);
881}
882
883static void
590free_coro_mortal () 884free_coro_mortal (pTHX)
591{ 885{
592 if (coro_mortal) 886 if (expect_true (coro_mortal))
593 { 887 {
594 SvREFCNT_dec (coro_mortal); 888 SvREFCNT_dec (coro_mortal);
595 coro_mortal = 0; 889 coro_mortal = 0;
596 } 890 }
597} 891}
598 892
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 */
599static void NOINLINE 1020static void NOINLINE
600prepare_cctx (coro_stack *cctx) 1021cctx_prepare (pTHX_ coro_cctx *cctx)
601{ 1022{
602 dSP; 1023 dSP;
603 LOGOP myop; 1024 LOGOP myop;
604 1025
1026 PL_top_env = &PL_start_env;
1027
1028 if (cctx->flags & CC_TRACE)
1029 PL_runops = runops_trace;
1030
605 Zero (&myop, 1, LOGOP); 1031 Zero (&myop, 1, LOGOP);
606 myop.op_next = PL_op; 1032 myop.op_next = PL_op;
607 myop.op_flags = OPf_WANT_VOID; 1033 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
608
609 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
610 1034
611 PUSHMARK (SP); 1035 PUSHMARK (SP);
1036 EXTEND (SP, 2);
1037 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
612 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE)); 1038 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
613 PUTBACK; 1039 PUTBACK;
1040 PL_op = (OP *)&myop;
614 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1041 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
615 SPAGAIN; 1042 SPAGAIN;
616} 1043}
617 1044
1045/*
1046 * this is a _very_ stripped down perl interpreter ;)
1047 */
618static void 1048static void
619coro_run (void *arg) 1049cctx_run (void *arg)
620{ 1050{
1051 dTHX;
1052
621 /* coro_run is the alternative epilogue of transfer() */ 1053 /* cctx_run is the alternative tail of transfer(), so unlock here. */
622 UNLOCK; 1054 UNLOCK;
623 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
624 /* 1066 /*
625 * this is a _very_ stripped down perl interpreter ;) 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
626 */ 1072 */
627 PL_top_env = &PL_start_env; 1073 PL_top_env = main_top_env;
628 /* inject call to cctx_init */ 1074 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
629 prepare_cctx ((coro_stack *)arg);
630
631 /* somebody will hit me for both perl_run and PL_restartop */
632 perl_run (PL_curinterp);
633
634 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
635 abort ();
636} 1075}
637 1076
638static coro_stack * 1077static coro_cctx *
639stack_new () 1078cctx_new ()
640{ 1079{
641 coro_stack *stack; 1080 coro_cctx *cctx;
1081 void *stack_start;
1082 size_t stack_size;
642 1083
1084 ++cctx_count;
1085
643 New (0, stack, 1, coro_stack); 1086 Newz (0, cctx, 1, coro_cctx);
644 1087
645#if HAVE_MMAP 1088#if HAVE_MMAP
646
647 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1089 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
648 /* mmap suppsedly does allocate-on-write for us */ 1090 /* mmap supposedly does allocate-on-write for us */
649 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1091 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
650 1092
651 if (stack->sptr == (void *)-1) 1093 if (cctx->sptr != (void *)-1)
652 {
653 perror ("FATAL: unable to mmap stack for coroutine");
654 _exit (EXIT_FAILURE);
655 } 1094 {
656
657# if STACKGUARD 1095# if CORO_STACKGUARD
658 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1096 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
659# endif 1097# endif
660 1098 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
661#else 1099 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
662 1100 cctx->flags |= CC_MAPPED;
663 stack->ssize = STACKSIZE * (long)sizeof (long);
664 New (0, stack->sptr, STACKSIZE, long);
665
666 if (!stack->sptr)
667 { 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 {
668 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1110 perror ("FATAL: unable to allocate stack for coroutine");
669 _exit (EXIT_FAILURE); 1111 _exit (EXIT_FAILURE);
670 } 1112 }
671 1113
672#endif 1114 stack_start = cctx->sptr;
1115 stack_size = cctx->ssize;
1116 }
673 1117
674#if USE_VALGRIND 1118 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
675 stack->valgrind_id = VALGRIND_STACK_REGISTER ( 1119 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
676 STACKGUARD * PAGESIZE + (char *)stack->sptr,
677 stack->ssize + (char *)stack->sptr
678 );
679#endif
680 1120
681 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
682
683 return stack; 1121 return cctx;
684} 1122}
685 1123
686static void 1124static void
687stack_free (coro_stack *stack) 1125cctx_destroy (coro_cctx *cctx)
688{ 1126{
689 if (!stack) 1127 if (!cctx)
690 return; 1128 return;
691 1129
1130 --cctx_count;
1131
692#if USE_VALGRIND 1132#if CORO_USE_VALGRIND
693 VALGRIND_STACK_DEREGISTER (stack->valgrind_id); 1133 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
694#endif 1134#endif
695 1135
696#if HAVE_MMAP 1136#if HAVE_MMAP
1137 if (cctx->flags & CC_MAPPED)
697 munmap (stack->sptr, stack->ssize); 1138 munmap (cctx->sptr, cctx->ssize);
698#else 1139 else
1140#endif
699 Safefree (stack->sptr); 1141 Safefree (cctx->sptr);
700#endif
701 1142
702 Safefree (stack); 1143 Safefree (cctx);
703} 1144}
704 1145
705static coro_stack *stack_first; 1146/* wether this cctx should be destructed */
706static int cctx_count, cctx_idle; 1147#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
707 1148
708static coro_stack * 1149static coro_cctx *
709stack_get () 1150cctx_get (pTHX)
710{ 1151{
711 coro_stack *stack; 1152 while (expect_true (cctx_first))
712
713 if (stack_first)
714 { 1153 {
1154 coro_cctx *cctx = cctx_first;
1155 cctx_first = cctx->next;
715 --cctx_idle; 1156 --cctx_idle;
716 stack = stack_first; 1157
717 stack_first = stack->next; 1158 if (expect_true (!CCTX_EXPIRED (cctx)))
718 } 1159 return cctx;
719 else 1160
720 { 1161 cctx_destroy (cctx);
721 ++cctx_count;
722 stack = stack_new ();
723 PL_op = PL_op->op_next;
724 } 1162 }
725 1163
726 return stack; 1164 return cctx_new ();
727} 1165}
728 1166
729static void 1167static void
730stack_put (coro_stack *stack) 1168cctx_put (coro_cctx *cctx)
731{ 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
732 ++cctx_idle; 1180 ++cctx_idle;
733 stack->next = stack_first; 1181 cctx->next = cctx_first;
734 stack_first = stack; 1182 cctx_first = cctx;
735} 1183}
736 1184
737/* never call directly, always through the coro_state_transfer global variable */ 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 */
738static void NOINLINE 1209static void NOINLINE
739transfer (struct coro *prev, struct coro *next, int flags) 1210transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
740{ 1211{
741 dSTACKLEVEL; 1212 dSTACKLEVEL;
1213 static volatile int has_throw;
742 1214
743 /* sometimes transfer is only called to set idle_sp */ 1215 /* sometimes transfer is only called to set idle_sp */
744 if (flags == TRANSFER_SET_STACKLEVEL) 1216 if (expect_false (!next))
1217 {
745 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1218 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
746 else if (prev != next) 1219 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747 { 1220 }
1221 else if (expect_true (prev != next))
1222 {
748 coro_stack *prev__stack; 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;
749 1235
750 LOCK; 1236 LOCK;
751 1237
752 if (next->mainstack) 1238 /* first get rid of the old state */
1239 save_perl (aTHX_ prev);
1240
1241 if (expect_false (next->flags & CF_NEW))
753 { 1242 {
754 /* coroutine already started */ 1243 /* need to start coroutine */
755 SAVE (prev, flags); 1244 next->flags &= ~CF_NEW;
756 LOAD (next); 1245 /* setup coroutine call */
1246 coro_setup (aTHX_ next);
757 } 1247 }
758 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 ))
759 { 1259 {
760 /* need to start coroutine */ 1260 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
761 /* first get rid of the old state */ 1261 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
762 SAVE (prev, -1); 1262
763 /* setup coroutine call */ 1263 prev->cctx = 0;
764 setup_coro (next); 1264
765 /* need a stack */ 1265 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
766 next->stack = 0; 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);
767 } 1272 }
768 1273
769 if (!prev->stack) 1274 ++next->usecount;
770 /* create a new empty context */
771 Newz (0, prev->stack, 1, coro_stack);
772 1275
773 prev__stack = prev->stack; 1276 if (expect_true (!next->cctx))
1277 next->cctx = cctx_get (aTHX);
774 1278
775 /* possibly "free" the stack */ 1279 has_throw = !!next->throw;
776 if (prev__stack->idle_sp == STACKLEVEL) 1280
1281 if (expect_false (prev__cctx != next->cctx))
777 { 1282 {
778 stack_put (prev__stack); 1283 prev__cctx->top_env = PL_top_env;
779 prev->stack = 0; 1284 PL_top_env = next->cctx->top_env;
1285 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
780 } 1286 }
781 1287
782 if (!next->stack) 1288 free_coro_mortal (aTHX);
783 next->stack = stack_get (); 1289 UNLOCK;
784 1290
785 if (prev__stack != next->stack) 1291 if (expect_false (has_throw))
786 { 1292 {
787 prev__stack->top_env = PL_top_env; 1293 struct coro *coro = SvSTATE (coro_current);
788 PL_top_env = next->stack->top_env; 1294
789 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1295 if (coro->throw)
1296 {
1297 SV *exception = coro->throw;
1298 coro->throw = 0;
1299 sv_setsv (ERRSV, exception);
1300 croak (0);
1301 }
790 } 1302 }
1303 }
1304}
791 1305
792 free_coro_mortal (); 1306struct transfer_args
1307{
1308 struct coro *prev, *next;
1309};
793 1310
1311#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1312#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1313
1314/** high level stuff ********************************************************/
1315
1316static int
1317coro_state_destroy (pTHX_ struct coro *coro)
1318{
1319 if (coro->flags & CF_DESTROYED)
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;
794 UNLOCK; 1330 UNLOCK;
795 } 1331 }
796} 1332 else
797 1333 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
798struct transfer_args
799{
800 struct coro *prev, *next;
801 int flags;
802};
803
804#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
805
806static void
807coro_state_destroy (struct coro *coro)
808{
809 if (coro->refcnt--)
810 return;
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 ((&temp), TRANSFER_SAVE_ALL); 1339 if (coro->flags & CF_RUNNING)
817 LOAD (coro); 1340 croak ("FATAL: tried to destroy currently running coroutine");
818 1341
819 coro_destroy_stacks (); 1342 save_perl (aTHX_ &temp);
1343 load_perl (aTHX_ coro);
820 1344
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1345 coro_destroy (aTHX_ coro);
822 1346
1347 load_perl (aTHX_ &temp);
1348
823 coro->mainstack = 0; 1349 coro->slot = 0;
824 } 1350 }
825 1351
826 stack_free (coro->stack); 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 (pTHX_ 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
… …
849 return 0; 1386 return 0;
850} 1387}
851 1388
852static MGVTBL coro_state_vtbl = { 1389static MGVTBL coro_state_vtbl = {
853 0, 0, 0, 0, 1390 0, 0, 0, 0,
854 coro_state_clear, 1391 coro_state_free,
855 0, 1392 0,
856#ifdef MGf_DUP 1393#ifdef MGf_DUP
857 coro_state_dup, 1394 coro_state_dup,
858#else 1395#else
859# define MGf_DUP 0 1396# define MGf_DUP 0
860#endif 1397#endif
861}; 1398};
862 1399
863static struct coro *
864SvSTATE (SV *coro)
865{
866 HV *stash;
867 MAGIC *mg;
868
869 if (SvROK (coro))
870 coro = SvRV (coro);
871
872 stash = SvSTASH (coro);
873 if (stash != coro_stash && stash != coro_state_stash)
874 {
875 /* very slow, but rare, check */
876 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
877 croak ("Coro::State object required");
878 }
879
880 mg = SvMAGIC (coro);
881 assert (mg->mg_type == PERL_MAGIC_ext);
882 return (struct coro *)mg->mg_ptr;
883}
884
885static void 1400static void
886prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1401prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
887{ 1402{
888 ta->prev = SvSTATE (prev); 1403 ta->prev = SvSTATE (prev_sv);
889 ta->next = SvSTATE (next); 1404 ta->next = SvSTATE (next_sv);
890 ta->flags = flags; 1405 TRANSFER_CHECK (*ta);
891} 1406}
892 1407
893static void 1408static void
894api_transfer (SV *prev, SV *next, int flags) 1409api_transfer (SV *prev_sv, SV *next_sv)
895{ 1410{
896 dTHX; 1411 dTHX;
897 struct transfer_args ta; 1412 struct transfer_args ta;
898 1413
899 prepare_transfer (&ta, prev, next, flags); 1414 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900 TRANSFER (ta); 1415 TRANSFER (ta, 1);
901} 1416}
902 1417
903/** Coro ********************************************************************/ 1418/** Coro ********************************************************************/
904 1419
905#define PRIO_MAX 3
906#define PRIO_HIGH 1
907#define PRIO_NORMAL 0
908#define PRIO_LOW -1
909#define PRIO_IDLE -3
910#define PRIO_MIN -4
911
912/* for Coro.pm */
913static GV *coro_current, *coro_idle;
914static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
915static int coro_nready;
916
917static void 1420static void
918coro_enq (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)
919{ 1428{
920 int prio; 1429 int prio;
921 1430
922 if (SvTYPE (sv) != SVt_PVHV)
923 croak ("Coro::ready tried to enqueue something that is not a coroutine");
924
925 prio = SvSTATE (sv)->prio;
926
927 av_push (coro_ready [prio - PRIO_MIN], sv);
928 coro_nready++;
929}
930
931static SV *
932coro_deq (int min_prio)
933{
934 int prio = PRIO_MAX - PRIO_MIN;
935
936 min_prio -= PRIO_MIN;
937 if (min_prio < 0)
938 min_prio = 0;
939
940 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1431 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
941 if (AvFILLp (coro_ready [prio]) >= 0) 1432 if (AvFILLp (coro_ready [prio]) >= 0)
942 {
943 coro_nready--;
944 return av_shift (coro_ready [prio]); 1433 return av_shift (coro_ready [prio]);
945 }
946 1434
947 return 0; 1435 return 0;
948} 1436}
949 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
950static void 1495static void
951api_ready (SV *coro) 1496prepare_schedule (pTHX_ struct transfer_args *ta)
952{ 1497{
953 dTHX; 1498 SV *prev_sv, *next_sv;
954 1499
955 if (SvROK (coro)) 1500 for (;;)
956 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);
957 1547
958 LOCK; 1548 LOCK;
959 coro_enq (SvREFCNT_inc (coro)); 1549 free_coro_mortal (aTHX);
1550 coro_mortal = prev_sv;
960 UNLOCK; 1551 UNLOCK;
961} 1552}
962 1553
963static void 1554static void
964prepare_schedule (struct transfer_args *ta)
965{
966 SV *current, *prev, *next;
967
968 current = GvSV (coro_current);
969
970 for (;;)
971 {
972 LOCK;
973 next = coro_deq (PRIO_MIN);
974 UNLOCK;
975
976 if (next)
977 break;
978
979 {
980 dSP;
981
982 ENTER;
983 SAVETMPS;
984
985 PUSHMARK (SP);
986 PUTBACK;
987 call_sv (GvSV (coro_idle), G_DISCARD);
988
989 FREETMPS;
990 LEAVE;
991 }
992 }
993
994 prev = SvRV (current);
995 SvRV (current) = next;
996
997 /* free this only after the transfer */
998 LOCK;
999 free_coro_mortal ();
1000 UNLOCK;
1001 coro_mortal = prev;
1002
1003 ta->prev = SvSTATE (prev);
1004 ta->next = SvSTATE (next);
1005 ta->flags = TRANSFER_SAVE_ALL;
1006}
1007
1008static void
1009prepare_cede (struct transfer_args *ta) 1555prepare_cede (pTHX_ struct transfer_args *ta)
1010{ 1556{
1011 LOCK; 1557 api_ready (coro_current);
1012 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1013 UNLOCK;
1014
1015 prepare_schedule (ta); 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;
1016} 1573}
1017 1574
1018static void 1575static void
1019api_schedule (void) 1576api_schedule (void)
1020{ 1577{
1021 dTHX; 1578 dTHX;
1022 struct transfer_args ta; 1579 struct transfer_args ta;
1023 1580
1024 prepare_schedule (&ta); 1581 prepare_schedule (aTHX_ &ta);
1025 TRANSFER (ta); 1582 TRANSFER (ta, 1);
1026} 1583}
1027 1584
1028static void 1585static int
1029api_cede (void) 1586api_cede (void)
1030{ 1587{
1031 dTHX; 1588 dTHX;
1032 struct transfer_args ta; 1589 struct transfer_args ta;
1033 1590
1034 prepare_cede (&ta); 1591 prepare_cede (aTHX_ &ta);
1592
1593 if (expect_true (ta.prev != ta.next))
1594 {
1035 TRANSFER (ta); 1595 TRANSFER (ta, 1);
1596 return 1;
1597 }
1598 else
1599 return 0;
1036} 1600}
1037 1601
1602static int
1603api_cede_notself (void)
1604{
1605 dTHX;
1606 struct transfer_args ta;
1607
1608 if (prepare_cede_notself (aTHX_ &ta))
1609 {
1610 TRANSFER (ta, 1);
1611 return 1;
1612 }
1613 else
1614 return 0;
1615}
1616
1617static void
1618api_trace (SV *coro_sv, int flags)
1619{
1620 dTHX;
1621 struct coro *coro = SvSTATE (coro_sv);
1622
1623 if (flags & CC_TRACE)
1624 {
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");
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 {
1695 api_cede ();
1696 self->next = now + self->every;
1697 }
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
1038MODULE = Coro::State PACKAGE = Coro::State 1735MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1039 1736
1040PROTOTYPES: DISABLE 1737PROTOTYPES: DISABLE
1041 1738
1042BOOT: 1739BOOT:
1043{ 1740{
1044#ifdef USE_ITHREADS 1741#ifdef USE_ITHREADS
1045 MUTEX_INIT (&coro_mutex); 1742 MUTEX_INIT (&coro_mutex);
1046#endif 1743#endif
1047 BOOT_PAGESIZE; 1744 BOOT_PAGESIZE;
1048 1745
1746 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
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
1049 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1757 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1050 1758
1051 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1759 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1052 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1760 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1053 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1761 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1762 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1054 1763
1055 main_mainstack = PL_mainstack; 1764 main_mainstack = PL_mainstack;
1765 main_top_env = PL_top_env;
1056 1766
1767 while (main_top_env->je_prev)
1768 main_top_env = main_top_env->je_prev;
1769
1057 coroapi.ver = CORO_API_VERSION; 1770 coroapi.ver = CORO_API_VERSION;
1771 coroapi.rev = CORO_API_REVISION;
1058 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 }
1059 1782
1060 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1783 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1061} 1784}
1062 1785
1063SV * 1786SV *
1064new (char *klass, ...) 1787new (char *klass, ...)
1065 CODE: 1788 CODE:
1066{ 1789{
1067 struct coro *coro; 1790 struct coro *coro;
1791 MAGIC *mg;
1068 HV *hv; 1792 HV *hv;
1069 int i; 1793 int i;
1070 1794
1071 Newz (0, coro, 1, struct coro); 1795 Newz (0, coro, 1, struct coro);
1072 coro->args = newAV (); 1796 coro->args = newAV ();
1797 coro->flags = CF_NEW;
1073 1798
1799 if (coro_first) coro_first->prev = coro;
1800 coro->next = coro_first;
1801 coro_first = coro;
1802
1074 hv = newHV (); 1803 coro->hv = hv = newHV ();
1075 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1804 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1805 mg->mg_flags |= MGf_DUP;
1076 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1806 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1077 1807
1808 av_extend (coro->args, items - 1);
1078 for (i = 1; i < items; i++) 1809 for (i = 1; i < items; i++)
1079 av_push (coro->args, newSVsv (ST (i))); 1810 av_push (coro->args, newSVsv (ST (i)));
1080
1081 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1082 /*coro->stack = 0;*/
1083} 1811}
1084 OUTPUT: 1812 OUTPUT:
1085 RETVAL 1813 RETVAL
1086 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
1087void 1818void
1088_set_stacklevel (...) 1819_set_stacklevel (...)
1089 ALIAS: 1820 ALIAS:
1090 Coro::State::transfer = 1 1821 Coro::State::transfer = 1
1091 Coro::schedule = 2 1822 Coro::schedule = 2
1092 Coro::cede = 3 1823 Coro::cede = 3
1093 Coro::Cont::yield = 4 1824 Coro::cede_notself = 4
1094 CODE: 1825 CODE:
1095{ 1826{
1096 struct transfer_args ta; 1827 struct transfer_args ta;
1097 1828
1829 PUTBACK;
1098 switch (ix) 1830 switch (ix)
1099 { 1831 {
1100 case 0: 1832 case 0:
1101 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1833 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102 ta.next = 0; 1834 ta.next = 0;
1103 ta.flags = TRANSFER_SET_STACKLEVEL;
1104 break; 1835 break;
1105 1836
1106 case 1: 1837 case 1:
1107 if (items != 3) 1838 if (items != 2)
1108 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1839 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109 1840
1110 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1841 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111 break; 1842 break;
1112 1843
1113 case 2: 1844 case 2:
1114 prepare_schedule (&ta); 1845 prepare_schedule (aTHX_ &ta);
1115 break; 1846 break;
1116 1847
1117 case 3: 1848 case 3:
1118 prepare_cede (&ta); 1849 prepare_cede (aTHX_ &ta);
1119 break; 1850 break;
1120 1851
1121 case 4: 1852 case 4:
1122 { 1853 if (!prepare_cede_notself (aTHX_ &ta))
1123 SV *yieldstack; 1854 XSRETURN_EMPTY;
1124 SV *sv;
1125 AV *defav = GvAV (PL_defgv);
1126 1855
1127 yieldstack = *hv_fetch (
1128 (HV *)SvRV (GvSV (coro_current)),
1129 "yieldstack", sizeof ("yieldstack") - 1,
1130 0
1131 );
1132
1133 /* set up @_ -- ugly */
1134 av_clear (defav);
1135 av_fill (defav, items - 1);
1136 while (items--)
1137 av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139 sv = av_pop ((AV *)SvRV (yieldstack));
1140 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142 ta.flags = 0;
1143 SvREFCNT_dec (sv);
1144 }
1145 break; 1856 break;
1146
1147 } 1857 }
1858 SPAGAIN;
1148 1859
1860 BARRIER;
1861 PUTBACK;
1149 TRANSFER (ta); 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 */
1150} 1865}
1866
1867bool
1868_destroy (SV *coro_sv)
1869 CODE:
1870 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1871 OUTPUT:
1872 RETVAL
1151 1873
1152void 1874void
1153_clone_state_from (SV *dst, SV *src)
1154 CODE:
1155{
1156 struct coro *coro_src = SvSTATE (src);
1157
1158 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160 ++coro_src->refcnt;
1161 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162}
1163
1164void
1165_exit (code) 1875_exit (int code)
1166 int code
1167 PROTOTYPE: $ 1876 PROTOTYPE: $
1168 CODE: 1877 CODE:
1169 _exit (code); 1878 _exit (code);
1170 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
1171MODULE = Coro::State PACKAGE = Coro 2034MODULE = Coro::State PACKAGE = Coro
1172 2035
1173BOOT: 2036BOOT:
1174{ 2037{
1175 int i; 2038 int i;
1176 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
1177 coro_stash = gv_stashpv ("Coro", TRUE); 2047 coro_stash = gv_stashpv ("Coro", TRUE);
1178 2048
1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2049 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2050 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2051 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2052 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2053 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2054 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185 2055
1186 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1187 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1188
1189 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2056 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190 coro_ready[i] = newAV (); 2057 coro_ready[i] = newAV ();
1191 2058
1192 { 2059 {
1193 SV *sv = perl_get_sv("Coro::API", 1); 2060 SV *sv = perl_get_sv ("Coro::API", TRUE);
2061 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1194 2062
1195 coroapi.schedule = api_schedule; 2063 coroapi.schedule = api_schedule;
1196 coroapi.cede = api_cede; 2064 coroapi.cede = api_cede;
2065 coroapi.cede_notself = api_cede_notself;
1197 coroapi.ready = api_ready; 2066 coroapi.ready = api_ready;
2067 coroapi.is_ready = api_is_ready;
1198 coroapi.nready = &coro_nready; 2068 coroapi.nready = &coro_nready;
1199 coroapi.current = coro_current; 2069 coroapi.current = coro_current;
1200 2070
1201 GCoroAPI = &coroapi; 2071 GCoroAPI = &coroapi;
1202 sv_setiv (sv, (IV)&coroapi); 2072 sv_setiv (sv, (IV)&coroapi);
1203 SvREADONLY_on (sv); 2073 SvREADONLY_on (sv);
1204 } 2074 }
1205} 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;
1206 2092
1207int 2093int
1208prio (Coro::State coro, int newprio = 0) 2094prio (Coro::State coro, int newprio = 0)
1209 ALIAS: 2095 ALIAS:
1210 nice = 1 2096 nice = 1
… …
1213 RETVAL = coro->prio; 2099 RETVAL = coro->prio;
1214 2100
1215 if (items > 1) 2101 if (items > 1)
1216 { 2102 {
1217 if (ix) 2103 if (ix)
1218 newprio += coro->prio; 2104 newprio = coro->prio - newprio;
1219 2105
1220 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2106 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1221 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2107 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1222 2108
1223 coro->prio = newprio; 2109 coro->prio = newprio;
1224 } 2110 }
1225} 2111}
2112 OUTPUT:
2113 RETVAL
1226 2114
1227void 2115SV *
1228ready (SV *self) 2116ready (SV *self)
1229 PROTOTYPE: $ 2117 PROTOTYPE: $
1230 CODE: 2118 CODE:
1231 api_ready (self); 2119 RETVAL = boolSV (api_ready (self));
2120 OUTPUT:
2121 RETVAL
1232 2122
1233int 2123int
1234nready (...) 2124nready (...)
1235 PROTOTYPE: 2125 PROTOTYPE:
1236 CODE: 2126 CODE:
1237 RETVAL = coro_nready; 2127 RETVAL = coro_nready;
1238 OUTPUT: 2128 OUTPUT:
1239 RETVAL 2129 RETVAL
1240 2130
1241MODULE = Coro::State PACKAGE = Coro::AIO 2131# for async_pool speedup
2132void
2133_pool_1 (SV *cb)
2134 CODE:
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}
2171
2172void
2173_pool_2 (SV *cb)
2174 CODE:
2175{
2176 struct coro *coro = SvSTATE (coro_current);
2177
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 ();
1242 2213
1243SV * 2214SV *
1244_get_state () 2215gensub (SV *sub, ...)
1245 CODE: 2216 PROTOTYPE: &;@
2217 CODE:
1246{ 2218{
1247 struct { 2219 struct coro *coro;
1248 int errorno; 2220 MAGIC *mg;
1249 int laststype; 2221 CV *xcv;
1250 int laststatval; 2222 CV *ncv = (CV *)newSV_type (SVt_PVCV);
1251 Stat_t statcache; 2223 int i;
1252 } data;
1253 2224
1254 data.errorno = errno; 2225 CvGV (ncv) = CvGV (cv);
1255 data.laststype = PL_laststype; 2226 CvFILE (ncv) = CvFILE (cv);
1256 data.laststatval = PL_laststatval;
1257 data.statcache = PL_statcache;
1258 2227
1259 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);
1260} 2246}
1261 OUTPUT: 2247 OUTPUT:
1262 RETVAL 2248 RETVAL
1263 2249
2250#endif
2251
2252
2253MODULE = Coro::State PACKAGE = Coro::AIO
2254
1264void 2255void
1265_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)
1266 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: @
1267 CODE: 2312 CODE:
1268{ 2313{
1269 struct { 2314 static int incede;
1270 int errorno;
1271 int laststype;
1272 int laststatval;
1273 Stat_t statcache;
1274 } *data = (void *)data_;
1275 2315
1276 errno = data->errorno; 2316 api_cede_notself ();
1277 PL_laststype = data->laststype; 2317
1278 PL_laststatval = data->laststatval; 2318 ++incede;
1279 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;
1280} 2332}
2333
2334
2335MODULE = Coro::State PACKAGE = PerlIO::cede
2336
2337BOOT:
2338 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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