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Comparing Coro/Coro/State.xs (file contents):
Revision 1.105 by root, Mon Nov 27 02:01:33 2006 UTC vs.
Revision 1.244 by root, Sun Sep 21 18:29:39 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"
6 9
7#include "patchlevel.h" 10#include "patchlevel.h"
8 11
12#include <stdio.h>
13#include <errno.h>
14#include <assert.h>
15
16#ifdef WIN32
17# undef setjmp
18# undef longjmp
19# undef _exit
20# define setjmp _setjmp // deep magic, don't ask
21#else
22# include <inttypes.h> /* most portable stdint.h */
23#endif
24
25#ifdef HAVE_MMAP
26# include <unistd.h>
27# include <sys/mman.h>
28# ifndef MAP_ANONYMOUS
29# ifdef MAP_ANON
30# define MAP_ANONYMOUS MAP_ANON
31# else
32# undef HAVE_MMAP
33# endif
34# endif
35# include <limits.h>
36# ifndef PAGESIZE
37# define PAGESIZE pagesize
38# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
39static long pagesize;
40# else
41# define BOOT_PAGESIZE (void)0
42# endif
43#else
44# define PAGESIZE 0
45# define BOOT_PAGESIZE (void)0
46#endif
47
9#if USE_VALGRIND 48#if CORO_USE_VALGRIND
10# include <valgrind/valgrind.h> 49# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
11#endif 53#endif
54
55/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8
12 57
13#define PERL_VERSION_ATLEAST(a,b,c) \ 58#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \ 59 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \ 60 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \ 61 && (PERL_VERSION > (b) \
… …
35# ifndef IS_PADCONST 80# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0 81# define IS_PADCONST(v) 0
37# endif 82# endif
38#endif 83#endif
39 84
40#include <stdio.h> 85/* 5.8.8 */
41#include <errno.h> 86#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0
88#endif
89#ifndef newSV
90# define newSV(l) NEWSV(0,l)
91#endif
92
93/* 5.11 */
94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
97
98/* 5.8.7 */
99#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v)
101#endif
42 102
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 103#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44# undef STACKGUARD 104# 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 105#endif
61# include <limits.h> 106
62# ifndef PAGESIZE 107#ifndef CORO_STACKGUARD
63# define PAGESIZE pagesize 108# define CORO_STACKGUARD 0
64# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
65static long pagesize;
66# else
67# define BOOT_PAGESIZE
68# endif 109#endif
69#endif
70 110
71/* The next macro should declare a variable stacklevel that contains and approximation 111/* prefer perl internal functions over our own? */
72 * to the current C stack pointer. Its property is that it changes with each call 112#ifndef CORO_PREFER_PERL_FUNCTIONS
73 * and should be unique. */ 113# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif
115
116/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */
74#define dSTACKLEVEL int stacklevel 118#define dSTACKLEVEL volatile char stacklevel
75#define STACKLEVEL ((void *)&stacklevel) 119#define STACKLEVEL ((void *)&stacklevel)
76 120
77#define IN_DESTRUCT (PL_main_cv == Nullcv) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
78 122
79#if __GNUC__ >= 3 123#if __GNUC__ >= 3
80# define attribute(x) __attribute__(x) 124# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value))
81#else 127#else
82# define attribute(x) 128# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr)
83#endif 131#endif
132
133#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1)
84 135
85#define NOINLINE attribute ((noinline)) 136#define NOINLINE attribute ((noinline))
86 137
87#include "CoroAPI.h" 138#include "CoroAPI.h"
88
89#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
90 139
91#ifdef USE_ITHREADS 140#ifdef USE_ITHREADS
92static perl_mutex coro_mutex; 141static perl_mutex coro_mutex;
93# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
94# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
95#else 144#else
96# define LOCK (void)0 145# define LOCK (void)0
97# define UNLOCK (void)0 146# define UNLOCK (void)0
98#endif 147#endif
99 148
149/* helper storage struct for Coro::AIO */
150struct io_state
151{
152 int errorno;
153 I32 laststype;
154 int laststatval;
155 Stat_t statcache;
156};
157
158static size_t coro_stacksize = CORO_STACKSIZE;
100static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
101static AV *main_mainstack; /* used to differentiate between $main and others */ 160static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env;
102static HV *coro_state_stash, *coro_stash; 162static HV *coro_state_stash, *coro_stash;
103static SV *coro_mortal; /* will be freed after next transfer */ 163static volatile SV *coro_mortal; /* will be freed after next transfer */
164
165static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook;
168static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */
170
171/* async_pool helper stuff */
172static SV *sv_pool_rss;
173static SV *sv_pool_size;
174static AV *av_async_pool;
175
176/* Coro::AnyEvent */
177static SV *sv_activity;
178
179static struct coro_cctx *cctx_first;
180static int cctx_count, cctx_idle;
181
182enum {
183 CC_MAPPED = 0x01,
184 CC_NOREUSE = 0x02, /* throw this away after tracing */
185 CC_TRACE = 0x04,
186 CC_TRACE_SUB = 0x08, /* trace sub calls */
187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189};
104 190
105/* this is a structure representing a c-level coroutine */ 191/* this is a structure representing a c-level coroutine */
106typedef struct coro_stack { 192typedef struct coro_cctx {
107 struct coro_stack *next; 193 struct coro_cctx *next;
108 194
109 /* the stack */ 195 /* the stack */
110 void *sptr; 196 void *sptr;
111 long ssize; /* positive == mmap, otherwise malloc */ 197 size_t ssize;
112 198
113 /* cpu state */ 199 /* cpu state */
114 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
115 JMPENV *top_env; 202 JMPENV *top_env;
116 coro_context cctx; 203 coro_context cctx;
117 204
118#if USE_VALGRIND 205#if CORO_USE_VALGRIND
119 int valgrind_id; 206 int valgrind_id;
120#endif 207#endif
121} coro_stack; 208 unsigned char flags;
209} coro_cctx;
210
211enum {
212 CF_RUNNING = 0x0001, /* coroutine is running */
213 CF_READY = 0x0002, /* coroutine is ready */
214 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216};
217
218/* the structure where most of the perl state is stored, overlaid on the cxstack */
219typedef struct {
220 SV *defsv;
221 AV *defav;
222 SV *errsv;
223 SV *irsgv;
224#define VAR(name,type) type name;
225# include "state.h"
226#undef VAR
227} perl_slots;
228
229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
122 230
123/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
124struct coro { 232struct coro {
125 /* the c coroutine allocated to this perl coroutine, if any */ 233 /* the c coroutine allocated to this perl coroutine, if any */
126 coro_stack *stack; 234 coro_cctx *cctx;
127 235
128 /* data associated with this coroutine (initial args) */ 236 /* 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; 237 AV *mainstack;
145 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
146 OP *op; 239
147 SV **curpad; 240 AV *args; /* data associated with this coroutine (initial args) */
148 AV *comppad; 241 int refcnt; /* coroutines are refcounted, yes */
149 CV *compcv; 242 int flags; /* CF_ flags */
150 SV **stack_base; 243 HV *hv; /* the perl hash associated with this coro, if any */
151 SV **stack_max; 244
152 SV **tmps_stack; 245 /* statistics */
153 I32 tmps_floor; 246 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;
170 247
171 /* coro process data */ 248 /* coro process data */
172 int prio; 249 int prio;
250 SV *throw; /* exception to be thrown */
251
252 /* async_pool */
253 SV *saved_deffh;
254
255 /* linked list */
256 struct coro *next, *prev;
173}; 257};
174 258
175typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
176typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
177 261
262/** Coro ********************************************************************/
263
264#define PRIO_MAX 3
265#define PRIO_HIGH 1
266#define PRIO_NORMAL 0
267#define PRIO_LOW -1
268#define PRIO_IDLE -3
269#define PRIO_MIN -4
270
271/* for Coro.pm */
272static SV *coro_current;
273static SV *coro_readyhook;
274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
275static int coro_nready;
276static struct coro *coro_first;
277
278/** lowlevel stuff **********************************************************/
279
280static SV *
281coro_get_sv (pTHX_ const char *name, int create)
282{
283#if PERL_VERSION_ATLEAST (5,10,0)
284 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
285 get_sv (name, create);
286#endif
287 return get_sv (name, create);
288}
289
178static AV * 290static AV *
291coro_get_av (pTHX_ const char *name, int create)
292{
293#if PERL_VERSION_ATLEAST (5,10,0)
294 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
295 get_av (name, create);
296#endif
297 return get_av (name, create);
298}
299
300static HV *
301coro_get_hv (pTHX_ const char *name, int create)
302{
303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_hv (name, create);
306#endif
307 return get_hv (name, create);
308}
309
310static AV *
179coro_clone_padlist (CV *cv) 311coro_clone_padlist (pTHX_ CV *cv)
180{ 312{
181 AV *padlist = CvPADLIST (cv); 313 AV *padlist = CvPADLIST (cv);
182 AV *newpadlist, *newpad; 314 AV *newpadlist, *newpad;
183 315
184 newpadlist = newAV (); 316 newpadlist = newAV ();
185 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
186#if PERL_VERSION_ATLEAST (5,9,0) 318#if PERL_VERSION_ATLEAST (5,10,0)
187 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
188#else 320#else
189 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
190#endif 322#endif
191 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
… …
196 328
197 return newpadlist; 329 return newpadlist;
198} 330}
199 331
200static void 332static void
201free_padlist (AV *padlist) 333free_padlist (pTHX_ AV *padlist)
202{ 334{
203 /* may be during global destruction */ 335 /* may be during global destruction */
204 if (SvREFCNT (padlist)) 336 if (SvREFCNT (padlist))
205 { 337 {
206 I32 i = AvFILLp (padlist); 338 I32 i = AvFILLp (padlist);
… …
227 AV *padlist; 359 AV *padlist;
228 AV *av = (AV *)mg->mg_obj; 360 AV *av = (AV *)mg->mg_obj;
229 361
230 /* casting is fun. */ 362 /* casting is fun. */
231 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
232 free_padlist (padlist); 364 free_padlist (aTHX_ padlist);
233 365
234 SvREFCNT_dec (av); 366 SvREFCNT_dec (av);
235 367
236 return 0; 368 return 0;
237} 369}
238 370
239#define PERL_MAGIC_coro PERL_MAGIC_ext 371#define CORO_MAGIC_type_cv PERL_MAGIC_ext
372#define CORO_MAGIC_type_state PERL_MAGIC_ext
240 373
241static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 374static MGVTBL coro_cv_vtbl = {
375 0, 0, 0, 0,
376 coro_cv_free
377};
378
379#define CORO_MAGIC(sv,type) \
380 SvMAGIC (sv) \
381 ? SvMAGIC (sv)->mg_type == type \
382 ? SvMAGIC (sv) \
383 : mg_find (sv, type) \
384 : 0
385
386#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
387#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
388
389static struct coro *
390SvSTATE_ (pTHX_ SV *coro)
391{
392 HV *stash;
393 MAGIC *mg;
394
395 if (SvROK (coro))
396 coro = SvRV (coro);
397
398 if (expect_false (SvTYPE (coro) != SVt_PVHV))
399 croak ("Coro::State object required");
400
401 stash = SvSTASH (coro);
402 if (expect_false (stash != coro_stash && stash != coro_state_stash))
403 {
404 /* very slow, but rare, check */
405 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
406 croak ("Coro::State object required");
407 }
408
409 mg = CORO_MAGIC_state (coro);
410 return (struct coro *)mg->mg_ptr;
411}
412
413#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
242 414
243/* the next two functions merely cache the padlists */ 415/* the next two functions merely cache the padlists */
244static void 416static void
245get_padlist (CV *cv) 417get_padlist (pTHX_ CV *cv)
246{ 418{
247 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 419 MAGIC *mg = CORO_MAGIC_cv (cv);
420 AV *av;
248 421
249 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 422 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
250 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 423 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
251 else 424 else
252 { 425 {
253#if 0 426#if CORO_PREFER_PERL_FUNCTIONS
254 /* this is probably cleaner, but also slower? */ 427 /* this is probably cleaner? but also slower! */
428 /* in practise, it seems to be less stable */
255 CV *cp = Perl_cv_clone (cv); 429 CV *cp = Perl_cv_clone (cv);
256 CvPADLIST (cv) = CvPADLIST (cp); 430 CvPADLIST (cv) = CvPADLIST (cp);
257 CvPADLIST (cp) = 0; 431 CvPADLIST (cp) = 0;
258 SvREFCNT_dec (cp); 432 SvREFCNT_dec (cp);
259#else 433#else
260 CvPADLIST (cv) = coro_clone_padlist (cv); 434 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
261#endif 435#endif
262 } 436 }
263} 437}
264 438
265static void 439static void
266put_padlist (CV *cv) 440put_padlist (pTHX_ CV *cv)
267{ 441{
268 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 442 MAGIC *mg = CORO_MAGIC_cv (cv);
443 AV *av;
269 444
270 if (!mg) 445 if (expect_false (!mg))
271 { 446 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 }
277 447
278 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 448 av = (AV *)mg->mg_obj;
279}
280 449
281#define SB do { 450 if (expect_false (AvFILLp (av) >= AvMAX (av)))
282#define SE } while (0) 451 av_extend (av, AvMAX (av) + 1);
283 452
284#define LOAD(state) load_state((state)); 453 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285#define SAVE(state,flags) save_state((state),(flags)); 454}
286 455
287#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 456/** load & save, init *******************************************************/
288 457
289static void 458static void
290load_state(Coro__State c) 459load_perl (pTHX_ Coro__State c)
291{ 460{
292 PL_dowarn = c->dowarn; 461 perl_slots *slot = c->slot;
293 PL_in_eval = c->in_eval; 462 c->slot = 0;
294 463
295 PL_curstackinfo = c->curstackinfo;
296 PL_curstack = c->curstack;
297 PL_mainstack = c->mainstack; 464 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;
325 465
326 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 466 GvSV (PL_defgv) = slot->defsv;
327 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 467 GvAV (PL_defgv) = slot->defav;
328 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 468 GvSV (PL_errgv) = slot->errsv;
469 GvSV (irsgv) = slot->irsgv;
470
471 #define VAR(name,type) PL_ ## name = slot->name;
472 # include "state.h"
473 #undef VAR
329 474
330 { 475 {
331 dSP; 476 dSP;
477
332 CV *cv; 478 CV *cv;
333 479
334 /* now do the ugly restore mess */ 480 /* now do the ugly restore mess */
335 while ((cv = (CV *)POPs)) 481 while (expect_true (cv = (CV *)POPs))
336 { 482 {
337 AV *padlist = (AV *)POPs;
338
339 if (padlist)
340 {
341 put_padlist (cv); /* mark this padlist as available */ 483 put_padlist (aTHX_ cv); /* mark this padlist as available */
342 CvPADLIST(cv) = padlist; 484 CvDEPTH (cv) = PTR2IV (POPs);
343 } 485 CvPADLIST (cv) = (AV *)POPs;
344
345 ++CvDEPTH(cv);
346 } 486 }
347 487
348 PUTBACK; 488 PUTBACK;
349 } 489 }
350} 490}
351 491
352static void 492static void
353save_state(Coro__State c, int flags) 493save_perl (pTHX_ Coro__State c)
354{ 494{
355 { 495 {
356 dSP; 496 dSP;
357 I32 cxix = cxstack_ix; 497 I32 cxix = cxstack_ix;
358 PERL_CONTEXT *ccstk = cxstack; 498 PERL_CONTEXT *ccstk = cxstack;
… …
361 /* 501 /*
362 * the worst thing you can imagine happens first - we have to save 502 * the worst thing you can imagine happens first - we have to save
363 * (and reinitialize) all cv's in the whole callchain :( 503 * (and reinitialize) all cv's in the whole callchain :(
364 */ 504 */
365 505
366 PUSHs (Nullsv); 506 XPUSHs (Nullsv);
367 /* this loop was inspired by pp_caller */ 507 /* this loop was inspired by pp_caller */
368 for (;;) 508 for (;;)
369 { 509 {
370 while (cxix >= 0) 510 while (expect_true (cxix >= 0))
371 { 511 {
372 PERL_CONTEXT *cx = &ccstk[cxix--]; 512 PERL_CONTEXT *cx = &ccstk[cxix--];
373 513
374 if (CxTYPE(cx) == CXt_SUB) 514 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
375 { 515 {
376 CV *cv = cx->blk_sub.cv; 516 CV *cv = cx->blk_sub.cv;
517
377 if (CvDEPTH(cv)) 518 if (expect_true (CvDEPTH (cv)))
378 { 519 {
379 EXTEND (SP, CvDEPTH(cv)*2); 520 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)); 521 PUSHs ((SV *)CvPADLIST (cv));
522 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
389 PUSHs ((SV *)cv); 523 PUSHs ((SV *)cv);
390 524
525 CvDEPTH (cv) = 0;
391 get_padlist (cv); 526 get_padlist (aTHX_ cv);
392 } 527 }
393 } 528 }
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 } 529 }
403 530
404 if (top_si->si_type == PERLSI_MAIN) 531 if (expect_true (top_si->si_type == PERLSI_MAIN))
405 break; 532 break;
406 533
407 top_si = top_si->si_prev; 534 top_si = top_si->si_prev;
408 ccstk = top_si->si_cxstack; 535 ccstk = top_si->si_cxstack;
409 cxix = top_si->si_cxix; 536 cxix = top_si->si_cxix;
410 } 537 }
411 538
412 PUTBACK; 539 PUTBACK;
413 } 540 }
414 541
415 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 542 /* allocate some space on the context stack for our purposes */
416 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 543 /* we manually unroll here, as usually 2 slots is enough */
417 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 544 if (SLOT_COUNT >= 1) CXINC;
545 if (SLOT_COUNT >= 2) CXINC;
546 if (SLOT_COUNT >= 3) CXINC;
547 {
548 int i;
549 for (i = 3; i < SLOT_COUNT; ++i)
550 CXINC;
551 }
552 cxstack_ix -= SLOT_COUNT; /* undo allocation */
418 553
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; 554 c->mainstack = PL_mainstack;
425 c->stack_sp = PL_stack_sp; 555
426 c->op = PL_op; 556 {
427 c->curpad = PL_curpad; 557 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
428 c->comppad = PL_comppad; 558
429 c->compcv = PL_compcv; 559 slot->defav = GvAV (PL_defgv);
430 c->stack_base = PL_stack_base; 560 slot->defsv = DEFSV;
431 c->stack_max = PL_stack_max; 561 slot->errsv = ERRSV;
432 c->tmps_stack = PL_tmps_stack; 562 slot->irsgv = GvSV (irsgv);
433 c->tmps_floor = PL_tmps_floor; 563
434 c->tmps_ix = PL_tmps_ix; 564 #define VAR(name,type) slot->name = PL_ ## name;
435 c->tmps_max = PL_tmps_max; 565 # include "state.h"
436 c->markstack = PL_markstack; 566 #undef VAR
437 c->markstack_ptr = PL_markstack_ptr; 567 }
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} 568}
453 569
454/* 570/*
455 * allocate various perl stacks. This is an exact copy 571 * allocate various perl stacks. This is an exact copy
456 * of perl.c:init_stacks, except that it uses less memory 572 * of perl.c:init_stacks, except that it uses less memory
457 * on the (sometimes correct) assumption that coroutines do 573 * on the (sometimes correct) assumption that coroutines do
458 * not usually need a lot of stackspace. 574 * not usually need a lot of stackspace.
459 */ 575 */
576#if CORO_PREFER_PERL_FUNCTIONS
577# define coro_init_stacks init_stacks
578#else
460static void 579static void
461coro_init_stacks () 580coro_init_stacks (pTHX)
462{ 581{
463 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 582 PL_curstackinfo = new_stackinfo(32, 8);
464 PL_curstackinfo->si_type = PERLSI_MAIN; 583 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 584 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 585 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 586
468 PL_stack_base = AvARRAY(PL_curstack); 587 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 588 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 589 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 590
472 New(50,PL_tmps_stack,96,SV*); 591 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 592 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 593 PL_tmps_ix = -1;
475 PL_tmps_max = 96; 594 PL_tmps_max = 32;
476 595
477 New(54,PL_markstack,16,I32); 596 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 597 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 598 PL_markstack_max = PL_markstack + 16;
480 599
481#ifdef SET_MARK_OFFSET 600#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 601 SET_MARK_OFFSET;
483#endif 602#endif
484 603
485 New(54,PL_scopestack,16,I32); 604 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 605 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 606 PL_scopestack_max = 8;
488 607
489 New(54,PL_savestack,96,ANY); 608 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 609 PL_savestack_ix = 0;
491 PL_savestack_max = 96; 610 PL_savestack_max = 24;
492 611
493#if !PERL_VERSION_ATLEAST (5,9,0) 612#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,8,OP*); 613 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 614 PL_retstack_ix = 0;
496 PL_retstack_max = 8; 615 PL_retstack_max = 4;
497#endif 616#endif
498} 617}
618#endif
499 619
500/* 620/*
501 * destroy the stacks, the callchain etc... 621 * destroy the stacks, the callchain etc...
502 */ 622 */
503static void 623static void
504coro_destroy_stacks() 624coro_destroy_stacks (pTHX)
505{ 625{
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) 626 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 627 PL_curstackinfo = PL_curstackinfo->si_next;
519 628
520 while (PL_curstackinfo) 629 while (PL_curstackinfo)
521 { 630 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 631 PERL_SI *p = PL_curstackinfo->si_prev;
523 632
524 { /*D*//*remove*/
525 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */
528 }
529
530 if (!IN_DESTRUCT) 633 if (!IN_DESTRUCT)
531 {
532 dounwind (-1);/*D*//*remove*/
533 SvREFCNT_dec (PL_curstackinfo->si_stack); 634 SvREFCNT_dec (PL_curstackinfo->si_stack);
534 }
535 635
536 Safefree (PL_curstackinfo->si_cxstack); 636 Safefree (PL_curstackinfo->si_cxstack);
537 Safefree (PL_curstackinfo); 637 Safefree (PL_curstackinfo);
538 PL_curstackinfo = p; 638 PL_curstackinfo = p;
539 } 639 }
540 640
541 Safefree (PL_tmps_stack); 641 Safefree (PL_tmps_stack);
542 Safefree (PL_markstack); 642 Safefree (PL_markstack);
543 Safefree (PL_scopestack); 643 Safefree (PL_scopestack);
544 Safefree (PL_savestack); 644 Safefree (PL_savestack);
545#if !PERL_VERSION_ATLEAST (5,9,0) 645#if !PERL_VERSION_ATLEAST (5,10,0)
546 Safefree (PL_retstack); 646 Safefree (PL_retstack);
547#endif 647#endif
548} 648}
549 649
650static size_t
651coro_rss (pTHX_ struct coro *coro)
652{
653 size_t rss = sizeof (*coro);
654
655 if (coro->mainstack)
656 {
657 perl_slots tmp_slot;
658 perl_slots *slot;
659
660 if (coro->flags & CF_RUNNING)
661 {
662 slot = &tmp_slot;
663
664 #define VAR(name,type) slot->name = PL_ ## name;
665 # include "state.h"
666 #undef VAR
667 }
668 else
669 slot = coro->slot;
670
671 rss += sizeof (slot->curstackinfo);
672 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
673 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
674 rss += slot->tmps_max * sizeof (SV *);
675 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
676 rss += slot->scopestack_max * sizeof (I32);
677 rss += slot->savestack_max * sizeof (ANY);
678
679#if !PERL_VERSION_ATLEAST (5,10,0)
680 rss += slot->retstack_max * sizeof (OP *);
681#endif
682 }
683
684 return rss;
685}
686
687/** coroutine stack handling ************************************************/
688
689static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
690static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
691static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
692
693/* apparently < 5.8.8 */
694#ifndef MgPV_nolen_const
695#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
696 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
697 (const char*)(mg)->mg_ptr)
698#endif
699
700/*
701 * This overrides the default magic get method of %SIG elements.
702 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
703 * and instead of tryign to save and restore the hash elements, we just provide
704 * readback here.
705 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
706 * not expecting this to actually change the hook. This is a potential problem
707 * when a schedule happens then, but we ignore this.
708 */
709static int
710coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
711{
712 const char *s = MgPV_nolen_const (mg);
713
714 if (*s == '_')
715 {
716 SV **svp = 0;
717
718 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
719 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
720
721 if (svp)
722 {
723 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
724 return 0;
725 }
726 }
727
728 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
729}
730
731static int
732coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
733{
734 const char *s = MgPV_nolen_const (mg);
735
736 if (*s == '_')
737 {
738 SV **svp = 0;
739
740 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
741 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
742
743 if (svp)
744 {
745 SV *old = *svp;
746 *svp = 0;
747 SvREFCNT_dec (old);
748 return 0;
749 }
750 }
751
752 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
753}
754
755static int
756coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
757{
758 const char *s = MgPV_nolen_const (mg);
759
760 if (*s == '_')
761 {
762 SV **svp = 0;
763
764 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
765 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
766
767 if (svp)
768 {
769 SV *old = *svp;
770 *svp = newSVsv (sv);
771 SvREFCNT_dec (old);
772 return 0;
773 }
774 }
775
776 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
777}
778
550static void 779static void
551setup_coro (struct coro *coro) 780coro_setup (pTHX_ struct coro *coro)
552{ 781{
553 /* 782 /*
554 * emulate part of the perl startup here. 783 * emulate part of the perl startup here.
555 */ 784 */
556
557 coro_init_stacks (); 785 coro_init_stacks (aTHX);
558 786
787 PL_runops = RUNOPS_DEFAULT;
788 PL_curcop = &PL_compiling;
789 PL_in_eval = EVAL_NULL;
559 PL_curcop = 0; 790 PL_comppad = 0;
560 PL_in_eval = 0;
561 PL_curpm = 0; 791 PL_curpm = 0;
792 PL_curpad = 0;
793 PL_localizing = 0;
794 PL_dirty = 0;
795 PL_restartop = 0;
796#if PERL_VERSION_ATLEAST (5,10,0)
797 PL_parser = 0;
798#endif
799
800 /* recreate the die/warn hooks */
801 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
802 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
803
804 GvSV (PL_defgv) = newSV (0);
805 GvAV (PL_defgv) = coro->args; coro->args = 0;
806 GvSV (PL_errgv) = newSV (0);
807 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
808 PL_rs = newSVsv (GvSV (irsgv));
809 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
562 810
563 { 811 {
564 dSP; 812 dSP;
565 LOGOP myop; 813 LOGOP myop;
566 814
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); 815 Zero (&myop, 1, LOGOP);
574 myop.op_next = Nullop; 816 myop.op_next = Nullop;
575 myop.op_flags = OPf_WANT_VOID; 817 myop.op_flags = OPf_WANT_VOID;
576 818
819 PUSHMARK (SP);
820 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
821 PUTBACK;
577 PL_op = (OP *)&myop; 822 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); 823 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
583 SPAGAIN; 824 SPAGAIN;
584
585 ENTER; /* necessary e.g. for dounwind */
586 } 825 }
826
827 /* this newly created coroutine might be run on an existing cctx which most
828 * likely was suspended in set_stacklevel, called from entersub.
829 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
830 * so we ENTER here for symmetry
831 */
832 ENTER;
587} 833}
588 834
589static void 835static void
836coro_destroy (pTHX_ struct coro *coro)
837{
838 if (!IN_DESTRUCT)
839 {
840 /* restore all saved variables and stuff */
841 LEAVE_SCOPE (0);
842 assert (PL_tmps_floor == -1);
843
844 /* free all temporaries */
845 FREETMPS;
846 assert (PL_tmps_ix == -1);
847
848 /* unwind all extra stacks */
849 POPSTACK_TO (PL_mainstack);
850
851 /* unwind main stack */
852 dounwind (-1);
853 }
854
855 SvREFCNT_dec (GvSV (PL_defgv));
856 SvREFCNT_dec (GvAV (PL_defgv));
857 SvREFCNT_dec (GvSV (PL_errgv));
858 SvREFCNT_dec (PL_defoutgv);
859 SvREFCNT_dec (PL_rs);
860 SvREFCNT_dec (GvSV (irsgv));
861
862 SvREFCNT_dec (PL_diehook);
863 SvREFCNT_dec (PL_warnhook);
864
865 SvREFCNT_dec (coro->saved_deffh);
866 SvREFCNT_dec (coro->throw);
867
868 coro_destroy_stacks (aTHX);
869}
870
871static void
590free_coro_mortal () 872free_coro_mortal (pTHX)
591{ 873{
592 if (coro_mortal) 874 if (expect_true (coro_mortal))
593 { 875 {
594 SvREFCNT_dec (coro_mortal); 876 SvREFCNT_dec (coro_mortal);
595 coro_mortal = 0; 877 coro_mortal = 0;
596 } 878 }
597} 879}
598 880
881static int
882runops_trace (pTHX)
883{
884 COP *oldcop = 0;
885 int oldcxix = -2;
886 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
887 coro_cctx *cctx = coro->cctx;
888
889 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
890 {
891 PERL_ASYNC_CHECK ();
892
893 if (cctx->flags & CC_TRACE_ALL)
894 {
895 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
896 {
897 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
898 SV **bot, **top;
899 AV *av = newAV (); /* return values */
900 SV **cb;
901 dSP;
902
903 GV *gv = CvGV (cx->blk_sub.cv);
904 SV *fullname = sv_2mortal (newSV (0));
905 if (isGV (gv))
906 gv_efullname3 (fullname, gv, 0);
907
908 bot = PL_stack_base + cx->blk_oldsp + 1;
909 top = cx->blk_gimme == G_ARRAY ? SP + 1
910 : cx->blk_gimme == G_SCALAR ? bot + 1
911 : bot;
912
913 av_extend (av, top - bot);
914 while (bot < top)
915 av_push (av, SvREFCNT_inc (*bot++));
916
917 PL_runops = RUNOPS_DEFAULT;
918 ENTER;
919 SAVETMPS;
920 EXTEND (SP, 3);
921 PUSHMARK (SP);
922 PUSHs (&PL_sv_no);
923 PUSHs (fullname);
924 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
925 PUTBACK;
926 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
927 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
928 SPAGAIN;
929 FREETMPS;
930 LEAVE;
931 PL_runops = runops_trace;
932 }
933
934 if (oldcop != PL_curcop)
935 {
936 oldcop = PL_curcop;
937
938 if (PL_curcop != &PL_compiling)
939 {
940 SV **cb;
941
942 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
943 {
944 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
945
946 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
947 {
948 runops_proc_t old_runops = PL_runops;
949 dSP;
950 GV *gv = CvGV (cx->blk_sub.cv);
951 SV *fullname = sv_2mortal (newSV (0));
952
953 if (isGV (gv))
954 gv_efullname3 (fullname, gv, 0);
955
956 PL_runops = RUNOPS_DEFAULT;
957 ENTER;
958 SAVETMPS;
959 EXTEND (SP, 3);
960 PUSHMARK (SP);
961 PUSHs (&PL_sv_yes);
962 PUSHs (fullname);
963 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
964 PUTBACK;
965 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
966 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
967 SPAGAIN;
968 FREETMPS;
969 LEAVE;
970 PL_runops = runops_trace;
971 }
972
973 oldcxix = cxstack_ix;
974 }
975
976 if (cctx->flags & CC_TRACE_LINE)
977 {
978 dSP;
979
980 PL_runops = RUNOPS_DEFAULT;
981 ENTER;
982 SAVETMPS;
983 EXTEND (SP, 3);
984 PL_runops = RUNOPS_DEFAULT;
985 PUSHMARK (SP);
986 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
987 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
988 PUTBACK;
989 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
990 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
991 SPAGAIN;
992 FREETMPS;
993 LEAVE;
994 PL_runops = runops_trace;
995 }
996 }
997 }
998 }
999 }
1000
1001 TAINT_NOT;
1002 return 0;
1003}
1004
1005/* inject a fake call to Coro::State::_cctx_init into the execution */
1006/* _cctx_init should be careful, as it could be called at almost any time */
1007/* during execution of a perl program */
599static void NOINLINE 1008static void NOINLINE
600prepare_cctx (coro_stack *cctx) 1009cctx_prepare (pTHX_ coro_cctx *cctx)
601{ 1010{
602 dSP; 1011 dSP;
603 LOGOP myop; 1012 LOGOP myop;
604 1013
1014 PL_top_env = &PL_start_env;
1015
1016 if (cctx->flags & CC_TRACE)
1017 PL_runops = runops_trace;
1018
605 Zero (&myop, 1, LOGOP); 1019 Zero (&myop, 1, LOGOP);
606 myop.op_next = PL_op; 1020 myop.op_next = PL_op;
607 myop.op_flags = OPf_WANT_VOID; 1021 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
608
609 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
610 1022
611 PUSHMARK (SP); 1023 PUSHMARK (SP);
1024 EXTEND (SP, 2);
1025 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
612 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE)); 1026 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
613 PUTBACK; 1027 PUTBACK;
1028 PL_op = (OP *)&myop;
614 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1029 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
615 SPAGAIN; 1030 SPAGAIN;
616} 1031}
617 1032
1033/*
1034 * this is a _very_ stripped down perl interpreter ;)
1035 */
618static void 1036static void
619coro_run (void *arg) 1037cctx_run (void *arg)
620{ 1038{
1039 dTHX;
1040
621 /* coro_run is the alternative epilogue of transfer() */ 1041 /* cctx_run is the alternative tail of transfer(), so unlock here. */
622 UNLOCK; 1042 UNLOCK;
623 1043
1044 /* we now skip the entersub that lead to transfer() */
1045 PL_op = PL_op->op_next;
1046
1047 /* inject a fake subroutine call to cctx_init */
1048 cctx_prepare (aTHX_ (coro_cctx *)arg);
1049
1050 /* somebody or something will hit me for both perl_run and PL_restartop */
1051 PL_restartop = PL_op;
1052 perl_run (PL_curinterp);
1053
624 /* 1054 /*
625 * this is a _very_ stripped down perl interpreter ;) 1055 * If perl-run returns we assume exit() was being called or the coro
1056 * fell off the end, which seems to be the only valid (non-bug)
1057 * reason for perl_run to return. We try to exit by jumping to the
1058 * bootstrap-time "top" top_env, as we cannot restore the "main"
1059 * coroutine as Coro has no such concept
626 */ 1060 */
627 PL_top_env = &PL_start_env; 1061 PL_top_env = main_top_env;
628 /* inject call to cctx_init */ 1062 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. Did you call exit in a coroutine?\n", stderr);
635 abort ();
636} 1063}
637 1064
638static coro_stack * 1065static coro_cctx *
639stack_new () 1066cctx_new ()
640{ 1067{
641 coro_stack *stack; 1068 coro_cctx *cctx;
1069 void *stack_start;
1070 size_t stack_size;
642 1071
1072 ++cctx_count;
1073
643 New (0, stack, 1, coro_stack); 1074 Newz (0, cctx, 1, coro_cctx);
644 1075
645#if HAVE_MMAP 1076#if HAVE_MMAP
646
647 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1077 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
648 /* mmap suppsedly does allocate-on-write for us */ 1078 /* 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); 1079 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
650 1080
651 if (stack->sptr == (void *)-1) 1081 if (cctx->sptr != (void *)-1)
652 {
653 perror ("FATAL: unable to mmap stack for coroutine");
654 _exit (EXIT_FAILURE);
655 } 1082 {
656
657# if STACKGUARD 1083# if CORO_STACKGUARD
658 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1084 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
659# endif 1085# endif
660 1086 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
661#else 1087 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
662 1088 cctx->flags |= CC_MAPPED;
663 stack->ssize = STACKSIZE * (long)sizeof (long);
664 New (0, stack->sptr, STACKSIZE, long);
665
666 if (!stack->sptr)
667 { 1089 }
1090 else
1091#endif
1092 {
1093 cctx->ssize = coro_stacksize * (long)sizeof (long);
1094 New (0, cctx->sptr, coro_stacksize, long);
1095
1096 if (!cctx->sptr)
1097 {
668 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1098 perror ("FATAL: unable to allocate stack for coroutine");
669 _exit (EXIT_FAILURE); 1099 _exit (EXIT_FAILURE);
670 } 1100 }
671 1101
672#endif 1102 stack_start = cctx->sptr;
1103 stack_size = cctx->ssize;
1104 }
673 1105
674#if USE_VALGRIND 1106 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
675 stack->valgrind_id = VALGRIND_STACK_REGISTER ( 1107 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 1108
681 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
682
683 return stack; 1109 return cctx;
684} 1110}
685 1111
686static void 1112static void
687stack_free (coro_stack *stack) 1113cctx_destroy (coro_cctx *cctx)
688{ 1114{
689 if (!stack) 1115 if (!cctx)
690 return; 1116 return;
691 1117
1118 --cctx_count;
1119
692#if USE_VALGRIND 1120#if CORO_USE_VALGRIND
693 VALGRIND_STACK_DEREGISTER (stack->valgrind_id); 1121 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
694#endif 1122#endif
695 1123
696#if HAVE_MMAP 1124#if HAVE_MMAP
1125 if (cctx->flags & CC_MAPPED)
697 munmap (stack->sptr, stack->ssize); 1126 munmap (cctx->sptr, cctx->ssize);
698#else 1127 else
1128#endif
699 Safefree (stack->sptr); 1129 Safefree (cctx->sptr);
700#endif
701 1130
702 Safefree (stack); 1131 Safefree (cctx);
703} 1132}
704 1133
705static coro_stack *stack_first; 1134/* wether this cctx should be destructed */
706static int cctx_count, cctx_idle; 1135#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
707 1136
708static coro_stack * 1137static coro_cctx *
709stack_get () 1138cctx_get (pTHX)
710{ 1139{
711 coro_stack *stack; 1140 while (expect_true (cctx_first))
712
713 if (stack_first)
714 { 1141 {
1142 coro_cctx *cctx = cctx_first;
1143 cctx_first = cctx->next;
715 --cctx_idle; 1144 --cctx_idle;
716 stack = stack_first; 1145
717 stack_first = stack->next; 1146 if (expect_true (!CCTX_EXPIRED (cctx)))
718 } 1147 return cctx;
719 else 1148
720 { 1149 cctx_destroy (cctx);
721 ++cctx_count;
722 stack = stack_new ();
723 PL_op = PL_op->op_next;
724 } 1150 }
725 1151
726 return stack; 1152 return cctx_new ();
727} 1153}
728 1154
729static void 1155static void
730stack_put (coro_stack *stack) 1156cctx_put (coro_cctx *cctx)
731{ 1157{
1158 /* free another cctx if overlimit */
1159 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1160 {
1161 coro_cctx *first = cctx_first;
1162 cctx_first = first->next;
1163 --cctx_idle;
1164
1165 cctx_destroy (first);
1166 }
1167
732 ++cctx_idle; 1168 ++cctx_idle;
733 stack->next = stack_first; 1169 cctx->next = cctx_first;
734 stack_first = stack; 1170 cctx_first = cctx;
735} 1171}
736 1172
737/* never call directly, always through the coro_state_transfer global variable */ 1173/** coroutine switching *****************************************************/
1174
1175static void
1176transfer_check (pTHX_ struct coro *prev, struct coro *next)
1177{
1178 if (expect_true (prev != next))
1179 {
1180 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1181 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1182
1183 if (expect_false (next->flags & CF_RUNNING))
1184 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1185
1186 if (expect_false (next->flags & CF_DESTROYED))
1187 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1188
1189#if !PERL_VERSION_ATLEAST (5,10,0)
1190 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1191 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1192#endif
1193 }
1194}
1195
1196/* always use the TRANSFER macro */
738static void NOINLINE 1197static void NOINLINE
739transfer (struct coro *prev, struct coro *next, int flags) 1198transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
740{ 1199{
741 dSTACKLEVEL; 1200 dSTACKLEVEL;
1201 static volatile int has_throw;
742 1202
743 /* sometimes transfer is only called to set idle_sp */ 1203 /* sometimes transfer is only called to set idle_sp */
744 if (flags == TRANSFER_SET_STACKLEVEL) 1204 if (expect_false (!next))
1205 {
745 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1206 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
746 else if (prev != next) 1207 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747 { 1208 }
1209 else if (expect_true (prev != next))
1210 {
748 coro_stack *prev__stack; 1211 coro_cctx *prev__cctx;
1212
1213 if (expect_false (prev->flags & CF_NEW))
1214 {
1215 /* create a new empty context */
1216 Newz (0, prev->cctx, 1, coro_cctx);
1217 prev->flags &= ~CF_NEW;
1218 prev->flags |= CF_RUNNING;
1219 }
1220
1221 prev->flags &= ~CF_RUNNING;
1222 next->flags |= CF_RUNNING;
749 1223
750 LOCK; 1224 LOCK;
751 1225
752 if (next->mainstack) 1226 /* first get rid of the old state */
1227 save_perl (aTHX_ prev);
1228
1229 if (expect_false (next->flags & CF_NEW))
753 { 1230 {
754 /* coroutine already started */ 1231 /* need to start coroutine */
755 SAVE (prev, flags); 1232 next->flags &= ~CF_NEW;
756 LOAD (next); 1233 /* setup coroutine call */
1234 coro_setup (aTHX_ next);
757 } 1235 }
758 else 1236 else
1237 load_perl (aTHX_ next);
1238
1239 prev__cctx = prev->cctx;
1240
1241 /* possibly "free" the cctx */
1242 if (expect_true (
1243 prev__cctx->idle_sp == STACKLEVEL
1244 && !(prev__cctx->flags & CC_TRACE)
1245 && !force_cctx
1246 ))
759 { 1247 {
760 /* need to start coroutine */ 1248 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
761 /* first get rid of the old state */ 1249 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
762 SAVE (prev, -1); 1250
763 /* setup coroutine call */ 1251 prev->cctx = 0;
764 setup_coro (next); 1252
765 /* need a stack */ 1253 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
766 next->stack = 0; 1254 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1255 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1256 if (!next->cctx)
1257 next->cctx = cctx_get (aTHX);
1258
1259 cctx_put (prev__cctx);
767 } 1260 }
768 1261
769 if (!prev->stack) 1262 ++next->usecount;
770 /* create a new empty context */
771 Newz (0, prev->stack, 1, coro_stack);
772 1263
773 prev__stack = prev->stack; 1264 if (expect_true (!next->cctx))
1265 next->cctx = cctx_get (aTHX);
774 1266
775 /* possibly "free" the stack */ 1267 has_throw = !!next->throw;
776 if (prev__stack->idle_sp == STACKLEVEL) 1268
1269 if (expect_false (prev__cctx != next->cctx))
777 { 1270 {
778 stack_put (prev__stack); 1271 prev__cctx->top_env = PL_top_env;
779 prev->stack = 0; 1272 PL_top_env = next->cctx->top_env;
1273 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
780 } 1274 }
781 1275
782 if (!next->stack) 1276 free_coro_mortal (aTHX);
783 next->stack = stack_get (); 1277 UNLOCK;
784 1278
785 if (prev__stack != next->stack) 1279 if (expect_false (has_throw))
786 { 1280 {
787 prev__stack->top_env = PL_top_env; 1281 struct coro *coro = SvSTATE (coro_current);
788 PL_top_env = next->stack->top_env; 1282
789 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1283 if (coro->throw)
1284 {
1285 SV *exception = coro->throw;
1286 coro->throw = 0;
1287 sv_setsv (ERRSV, exception);
1288 croak (0);
1289 }
790 } 1290 }
1291 }
1292}
791 1293
792 free_coro_mortal (); 1294struct transfer_args
1295{
1296 struct coro *prev, *next;
1297};
793 1298
1299#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1300#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1301
1302/** high level stuff ********************************************************/
1303
1304static int
1305coro_state_destroy (pTHX_ struct coro *coro)
1306{
1307 if (coro->flags & CF_DESTROYED)
1308 return 0;
1309
1310 coro->flags |= CF_DESTROYED;
1311
1312 if (coro->flags & CF_READY)
1313 {
1314 /* reduce nready, as destroying a ready coro effectively unreadies it */
1315 /* alternative: look through all ready queues and remove the coro */
1316 LOCK;
1317 --coro_nready;
794 UNLOCK; 1318 UNLOCK;
795 } 1319 }
796} 1320 else
797 1321 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 1322
812 if (coro->mainstack && coro->mainstack != main_mainstack) 1323 if (coro->mainstack && coro->mainstack != main_mainstack)
813 { 1324 {
814 struct coro temp; 1325 struct coro temp;
815 1326
816 SAVE ((&temp), TRANSFER_SAVE_ALL); 1327 if (coro->flags & CF_RUNNING)
817 LOAD (coro); 1328 croak ("FATAL: tried to destroy currently running coroutine");
818 1329
819 coro_destroy_stacks (); 1330 save_perl (aTHX_ &temp);
1331 load_perl (aTHX_ coro);
820 1332
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1333 coro_destroy (aTHX_ coro);
822 1334
1335 load_perl (aTHX_ &temp);
1336
823 coro->mainstack = 0; 1337 coro->slot = 0;
824 } 1338 }
825 1339
826 stack_free (coro->stack); 1340 cctx_destroy (coro->cctx);
827 SvREFCNT_dec (coro->args); 1341 SvREFCNT_dec (coro->args);
828 Safefree (coro); 1342
1343 if (coro->next) coro->next->prev = coro->prev;
1344 if (coro->prev) coro->prev->next = coro->next;
1345 if (coro == coro_first) coro_first = coro->next;
1346
1347 return 1;
829} 1348}
830 1349
831static int 1350static int
832coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1351coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833{ 1352{
834 struct coro *coro = (struct coro *)mg->mg_ptr; 1353 struct coro *coro = (struct coro *)mg->mg_ptr;
835 mg->mg_ptr = 0; 1354 mg->mg_ptr = 0;
836 1355
1356 coro->hv = 0;
1357
1358 if (--coro->refcnt < 0)
1359 {
837 coro_state_destroy (coro); 1360 coro_state_destroy (aTHX_ coro);
1361 Safefree (coro);
1362 }
838 1363
839 return 0; 1364 return 0;
840} 1365}
841 1366
842static int 1367static int
… …
849 return 0; 1374 return 0;
850} 1375}
851 1376
852static MGVTBL coro_state_vtbl = { 1377static MGVTBL coro_state_vtbl = {
853 0, 0, 0, 0, 1378 0, 0, 0, 0,
854 coro_state_clear, 1379 coro_state_free,
855 0, 1380 0,
856#ifdef MGf_DUP 1381#ifdef MGf_DUP
857 coro_state_dup, 1382 coro_state_dup,
858#else 1383#else
859# define MGf_DUP 0 1384# define MGf_DUP 0
860#endif 1385#endif
861}; 1386};
862 1387
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 1388static void
886prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1389prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
887{ 1390{
888 ta->prev = SvSTATE (prev); 1391 ta->prev = SvSTATE (prev_sv);
889 ta->next = SvSTATE (next); 1392 ta->next = SvSTATE (next_sv);
890 ta->flags = flags; 1393 TRANSFER_CHECK (*ta);
891} 1394}
892 1395
893static void 1396static void
894api_transfer (SV *prev, SV *next, int flags) 1397api_transfer (SV *prev_sv, SV *next_sv)
895{ 1398{
896 dTHX; 1399 dTHX;
897 struct transfer_args ta; 1400 struct transfer_args ta;
898 1401
899 prepare_transfer (&ta, prev, next, flags); 1402 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900 TRANSFER (ta); 1403 TRANSFER (ta, 1);
901} 1404}
902 1405
903/** Coro ********************************************************************/ 1406/** Coro ********************************************************************/
904 1407
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 1408static void
918coro_enq (SV *sv) 1409coro_enq (pTHX_ SV *coro_sv)
1410{
1411 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1412}
1413
1414static SV *
1415coro_deq (pTHX)
919{ 1416{
920 int prio; 1417 int prio;
921 1418
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; ) 1419 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
941 if (AvFILLp (coro_ready [prio]) >= 0) 1420 if (AvFILLp (coro_ready [prio]) >= 0)
942 {
943 coro_nready--;
944 return av_shift (coro_ready [prio]); 1421 return av_shift (coro_ready [prio]);
945 }
946 1422
947 return 0; 1423 return 0;
948} 1424}
949 1425
1426static int
1427api_ready (SV *coro_sv)
1428{
1429 dTHX;
1430 struct coro *coro;
1431 SV *sv_hook;
1432 void (*xs_hook)(void);
1433
1434 if (SvROK (coro_sv))
1435 coro_sv = SvRV (coro_sv);
1436
1437 coro = SvSTATE (coro_sv);
1438
1439 if (coro->flags & CF_READY)
1440 return 0;
1441
1442 coro->flags |= CF_READY;
1443
1444 LOCK;
1445
1446 sv_hook = coro_nready ? 0 : coro_readyhook;
1447 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1448
1449 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1450 ++coro_nready;
1451
1452 UNLOCK;
1453
1454 if (sv_hook)
1455 {
1456 dSP;
1457
1458 ENTER;
1459 SAVETMPS;
1460
1461 PUSHMARK (SP);
1462 PUTBACK;
1463 call_sv (sv_hook, G_DISCARD);
1464 SPAGAIN;
1465
1466 FREETMPS;
1467 LEAVE;
1468 }
1469
1470 if (xs_hook)
1471 xs_hook ();
1472
1473 return 1;
1474}
1475
1476static int
1477api_is_ready (SV *coro_sv)
1478{
1479 dTHX;
1480 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1481}
1482
950static void 1483static void
951api_ready (SV *coro) 1484prepare_schedule (pTHX_ struct transfer_args *ta)
952{ 1485{
953 dTHX; 1486 SV *prev_sv, *next_sv;
954 1487
955 if (SvROK (coro)) 1488 for (;;)
956 coro = SvRV (coro); 1489 {
1490 LOCK;
1491 next_sv = coro_deq (aTHX);
1492
1493 /* nothing to schedule: call the idle handler */
1494 if (expect_false (!next_sv))
1495 {
1496 dSP;
1497 UNLOCK;
1498
1499 ENTER;
1500 SAVETMPS;
1501
1502 PUSHMARK (SP);
1503 PUTBACK;
1504 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1505 SPAGAIN;
1506
1507 FREETMPS;
1508 LEAVE;
1509 continue;
1510 }
1511
1512 ta->next = SvSTATE (next_sv);
1513
1514 /* cannot transfer to destroyed coros, skip and look for next */
1515 if (expect_false (ta->next->flags & CF_DESTROYED))
1516 {
1517 UNLOCK;
1518 SvREFCNT_dec (next_sv);
1519 /* coro_nready is already taken care of by destroy */
1520 continue;
1521 }
1522
1523 --coro_nready;
1524 UNLOCK;
1525 break;
1526 }
1527
1528 /* free this only after the transfer */
1529 prev_sv = SvRV (coro_current);
1530 ta->prev = SvSTATE (prev_sv);
1531 TRANSFER_CHECK (*ta);
1532 assert (ta->next->flags & CF_READY);
1533 ta->next->flags &= ~CF_READY;
1534 SvRV_set (coro_current, next_sv);
957 1535
958 LOCK; 1536 LOCK;
959 coro_enq (SvREFCNT_inc (coro)); 1537 free_coro_mortal (aTHX);
1538 coro_mortal = prev_sv;
960 UNLOCK; 1539 UNLOCK;
961} 1540}
962 1541
963static void 1542static 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) 1543prepare_cede (pTHX_ struct transfer_args *ta)
1010{ 1544{
1011 LOCK; 1545 api_ready (coro_current);
1012 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1013 UNLOCK;
1014
1015 prepare_schedule (ta); 1546 prepare_schedule (aTHX_ ta);
1547}
1548
1549static int
1550prepare_cede_notself (pTHX_ struct transfer_args *ta)
1551{
1552 if (coro_nready)
1553 {
1554 SV *prev = SvRV (coro_current);
1555 prepare_schedule (aTHX_ ta);
1556 api_ready (prev);
1557 return 1;
1558 }
1559 else
1560 return 0;
1016} 1561}
1017 1562
1018static void 1563static void
1019api_schedule (void) 1564api_schedule (void)
1020{ 1565{
1021 dTHX; 1566 dTHX;
1022 struct transfer_args ta; 1567 struct transfer_args ta;
1023 1568
1024 prepare_schedule (&ta); 1569 prepare_schedule (aTHX_ &ta);
1025 TRANSFER (ta); 1570 TRANSFER (ta, 1);
1026} 1571}
1027 1572
1028static void 1573static int
1029api_cede (void) 1574api_cede (void)
1030{ 1575{
1031 dTHX; 1576 dTHX;
1032 struct transfer_args ta; 1577 struct transfer_args ta;
1033 1578
1034 prepare_cede (&ta); 1579 prepare_cede (aTHX_ &ta);
1580
1581 if (expect_true (ta.prev != ta.next))
1582 {
1035 TRANSFER (ta); 1583 TRANSFER (ta, 1);
1584 return 1;
1585 }
1586 else
1587 return 0;
1036} 1588}
1037 1589
1590static int
1591api_cede_notself (void)
1592{
1593 dTHX;
1594 struct transfer_args ta;
1595
1596 if (prepare_cede_notself (aTHX_ &ta))
1597 {
1598 TRANSFER (ta, 1);
1599 return 1;
1600 }
1601 else
1602 return 0;
1603}
1604
1605static void
1606api_trace (SV *coro_sv, int flags)
1607{
1608 dTHX;
1609 struct coro *coro = SvSTATE (coro_sv);
1610
1611 if (flags & CC_TRACE)
1612 {
1613 if (!coro->cctx)
1614 coro->cctx = cctx_new ();
1615 else if (!(coro->cctx->flags & CC_TRACE))
1616 croak ("cannot enable tracing on coroutine with custom stack");
1617
1618 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1619 }
1620 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1621 {
1622 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1623
1624 if (coro->flags & CF_RUNNING)
1625 PL_runops = RUNOPS_DEFAULT;
1626 else
1627 coro->slot->runops = RUNOPS_DEFAULT;
1628 }
1629}
1630
1631static int
1632coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1633{
1634 AV *padlist;
1635 AV *av = (AV *)mg->mg_obj;
1636
1637 abort ();
1638
1639 return 0;
1640}
1641
1642static MGVTBL coro_gensub_vtbl = {
1643 0, 0, 0, 0,
1644 coro_gensub_free
1645};
1646
1038MODULE = Coro::State PACKAGE = Coro::State 1647MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1039 1648
1040PROTOTYPES: DISABLE 1649PROTOTYPES: DISABLE
1041 1650
1042BOOT: 1651BOOT:
1043{ 1652{
1044#ifdef USE_ITHREADS 1653#ifdef USE_ITHREADS
1045 MUTEX_INIT (&coro_mutex); 1654 MUTEX_INIT (&coro_mutex);
1046#endif 1655#endif
1047 BOOT_PAGESIZE; 1656 BOOT_PAGESIZE;
1048 1657
1658 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1659 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1660
1661 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1662 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1663 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1664
1665 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1666 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1667 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1668
1049 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1669 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1050 1670
1051 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1671 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1052 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1672 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1053 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1673 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1674 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1054 1675
1055 main_mainstack = PL_mainstack; 1676 main_mainstack = PL_mainstack;
1677 main_top_env = PL_top_env;
1056 1678
1679 while (main_top_env->je_prev)
1680 main_top_env = main_top_env->je_prev;
1681
1057 coroapi.ver = CORO_API_VERSION; 1682 coroapi.ver = CORO_API_VERSION;
1683 coroapi.rev = CORO_API_REVISION;
1058 coroapi.transfer = api_transfer; 1684 coroapi.transfer = api_transfer;
1059 1685
1060 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1686 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1061} 1687}
1062 1688
1063SV * 1689SV *
1064new (char *klass, ...) 1690new (char *klass, ...)
1065 CODE: 1691 CODE:
1066{ 1692{
1067 struct coro *coro; 1693 struct coro *coro;
1694 MAGIC *mg;
1068 HV *hv; 1695 HV *hv;
1069 int i; 1696 int i;
1070 1697
1071 Newz (0, coro, 1, struct coro); 1698 Newz (0, coro, 1, struct coro);
1072 coro->args = newAV (); 1699 coro->args = newAV ();
1700 coro->flags = CF_NEW;
1073 1701
1702 if (coro_first) coro_first->prev = coro;
1703 coro->next = coro_first;
1704 coro_first = coro;
1705
1074 hv = newHV (); 1706 coro->hv = hv = newHV ();
1075 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1707 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1708 mg->mg_flags |= MGf_DUP;
1076 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1709 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1077 1710
1711 av_extend (coro->args, items - 1);
1078 for (i = 1; i < items; i++) 1712 for (i = 1; i < items; i++)
1079 av_push (coro->args, newSVsv (ST (i))); 1713 av_push (coro->args, newSVsv (ST (i)));
1080
1081 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1082 /*coro->stack = 0;*/
1083} 1714}
1084 OUTPUT: 1715 OUTPUT:
1085 RETVAL 1716 RETVAL
1086 1717
1718# these not obviously related functions are all rolled into the same xs
1719# function to increase chances that they all will call transfer with the same
1720# stack offset
1087void 1721void
1088_set_stacklevel (...) 1722_set_stacklevel (...)
1089 ALIAS: 1723 ALIAS:
1090 Coro::State::transfer = 1 1724 Coro::State::transfer = 1
1091 Coro::schedule = 2 1725 Coro::schedule = 2
1092 Coro::cede = 3 1726 Coro::cede = 3
1093 Coro::Cont::yield = 4 1727 Coro::cede_notself = 4
1094 CODE: 1728 CODE:
1095{ 1729{
1096 struct transfer_args ta; 1730 struct transfer_args ta;
1097 1731
1732 PUTBACK;
1098 switch (ix) 1733 switch (ix)
1099 { 1734 {
1100 case 0: 1735 case 0:
1101 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1736 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102 ta.next = 0; 1737 ta.next = 0;
1103 ta.flags = TRANSFER_SET_STACKLEVEL;
1104 break; 1738 break;
1105 1739
1106 case 1: 1740 case 1:
1107 if (items != 3) 1741 if (items != 2)
1108 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1742 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109 1743
1110 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1744 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111 break; 1745 break;
1112 1746
1113 case 2: 1747 case 2:
1114 prepare_schedule (&ta); 1748 prepare_schedule (aTHX_ &ta);
1115 break; 1749 break;
1116 1750
1117 case 3: 1751 case 3:
1118 prepare_cede (&ta); 1752 prepare_cede (aTHX_ &ta);
1119 break; 1753 break;
1120 1754
1121 case 4: 1755 case 4:
1122 { 1756 if (!prepare_cede_notself (aTHX_ &ta))
1123 SV *yieldstack; 1757 XSRETURN_EMPTY;
1124 SV *sv;
1125 AV *defav = GvAV (PL_defgv);
1126 1758
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; 1759 break;
1146
1147 } 1760 }
1761 SPAGAIN;
1148 1762
1763 BARRIER;
1764 PUTBACK;
1149 TRANSFER (ta); 1765 TRANSFER (ta, 0);
1766 SPAGAIN; /* might be the sp of a different coroutine now */
1767 /* be extra careful not to ever do anything after TRANSFER */
1150} 1768}
1769
1770bool
1771_destroy (SV *coro_sv)
1772 CODE:
1773 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1774 OUTPUT:
1775 RETVAL
1151 1776
1152void 1777void
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) 1778_exit (int code)
1166 int code
1167 PROTOTYPE: $ 1779 PROTOTYPE: $
1168 CODE: 1780 CODE:
1169 _exit (code); 1781 _exit (code);
1170 1782
1783int
1784cctx_stacksize (int new_stacksize = 0)
1785 CODE:
1786 RETVAL = coro_stacksize;
1787 if (new_stacksize)
1788 coro_stacksize = new_stacksize;
1789 OUTPUT:
1790 RETVAL
1791
1792int
1793cctx_count ()
1794 CODE:
1795 RETVAL = cctx_count;
1796 OUTPUT:
1797 RETVAL
1798
1799int
1800cctx_idle ()
1801 CODE:
1802 RETVAL = cctx_idle;
1803 OUTPUT:
1804 RETVAL
1805
1806void
1807list ()
1808 PPCODE:
1809{
1810 struct coro *coro;
1811 for (coro = coro_first; coro; coro = coro->next)
1812 if (coro->hv)
1813 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1814}
1815
1816void
1817call (Coro::State coro, SV *coderef)
1818 ALIAS:
1819 eval = 1
1820 CODE:
1821{
1822 if (coro->mainstack)
1823 {
1824 struct coro temp;
1825
1826 if (!(coro->flags & CF_RUNNING))
1827 {
1828 PUTBACK;
1829 save_perl (aTHX_ &temp);
1830 load_perl (aTHX_ coro);
1831 }
1832
1833 {
1834 dSP;
1835 ENTER;
1836 SAVETMPS;
1837 PUTBACK;
1838 PUSHSTACK;
1839 PUSHMARK (SP);
1840
1841 if (ix)
1842 eval_sv (coderef, 0);
1843 else
1844 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1845
1846 POPSTACK;
1847 SPAGAIN;
1848 FREETMPS;
1849 LEAVE;
1850 PUTBACK;
1851 }
1852
1853 if (!(coro->flags & CF_RUNNING))
1854 {
1855 save_perl (aTHX_ coro);
1856 load_perl (aTHX_ &temp);
1857 SPAGAIN;
1858 }
1859 }
1860}
1861
1862SV *
1863is_ready (Coro::State coro)
1864 PROTOTYPE: $
1865 ALIAS:
1866 is_ready = CF_READY
1867 is_running = CF_RUNNING
1868 is_new = CF_NEW
1869 is_destroyed = CF_DESTROYED
1870 CODE:
1871 RETVAL = boolSV (coro->flags & ix);
1872 OUTPUT:
1873 RETVAL
1874
1875void
1876api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1877
1878SV *
1879has_cctx (Coro::State coro)
1880 PROTOTYPE: $
1881 CODE:
1882 RETVAL = boolSV (!!coro->cctx);
1883 OUTPUT:
1884 RETVAL
1885
1886int
1887is_traced (Coro::State coro)
1888 PROTOTYPE: $
1889 CODE:
1890 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1891 OUTPUT:
1892 RETVAL
1893
1894IV
1895rss (Coro::State coro)
1896 PROTOTYPE: $
1897 ALIAS:
1898 usecount = 1
1899 CODE:
1900 switch (ix)
1901 {
1902 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1903 case 1: RETVAL = coro->usecount; break;
1904 }
1905 OUTPUT:
1906 RETVAL
1907
1908void
1909force_cctx ()
1910 CODE:
1911 struct coro *coro = SvSTATE (coro_current);
1912 coro->cctx->idle_sp = 0;
1913
1914void
1915throw (Coro::State self, SV *throw = &PL_sv_undef)
1916 PROTOTYPE: $;$
1917 CODE:
1918 SvREFCNT_dec (self->throw);
1919 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1920
1921void
1922swap_defsv (Coro::State self)
1923 PROTOTYPE: $
1924 ALIAS:
1925 swap_defav = 1
1926 CODE:
1927 if (!self->slot)
1928 croak ("cannot swap state with coroutine that has no saved state");
1929 else
1930 {
1931 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1932 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1933
1934 SV *tmp = *src; *src = *dst; *dst = tmp;
1935 }
1936
1171MODULE = Coro::State PACKAGE = Coro 1937MODULE = Coro::State PACKAGE = Coro
1172 1938
1173BOOT: 1939BOOT:
1174{ 1940{
1175 int i; 1941 int i;
1176 1942
1943 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1944 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1945 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1946
1947 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1948 SvREADONLY_on (coro_current);
1949
1177 coro_stash = gv_stashpv ("Coro", TRUE); 1950 coro_stash = gv_stashpv ("Coro", TRUE);
1178 1951
1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1952 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1953 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1954 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1955 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1956 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1957 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185 1958
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--; ) 1959 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190 coro_ready[i] = newAV (); 1960 coro_ready[i] = newAV ();
1191 1961
1192 { 1962 {
1193 SV *sv = perl_get_sv("Coro::API", 1); 1963 SV *sv = perl_get_sv ("Coro::API", TRUE);
1964 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1194 1965
1195 coroapi.schedule = api_schedule; 1966 coroapi.schedule = api_schedule;
1196 coroapi.cede = api_cede; 1967 coroapi.cede = api_cede;
1968 coroapi.cede_notself = api_cede_notself;
1197 coroapi.ready = api_ready; 1969 coroapi.ready = api_ready;
1970 coroapi.is_ready = api_is_ready;
1198 coroapi.nready = &coro_nready; 1971 coroapi.nready = &coro_nready;
1199 coroapi.current = coro_current; 1972 coroapi.current = coro_current;
1200 1973
1201 GCoroAPI = &coroapi; 1974 GCoroAPI = &coroapi;
1202 sv_setiv (sv, (IV)&coroapi); 1975 sv_setiv (sv, (IV)&coroapi);
1203 SvREADONLY_on (sv); 1976 SvREADONLY_on (sv);
1204 } 1977 }
1205} 1978}
1979
1980void
1981_set_current (SV *current)
1982 PROTOTYPE: $
1983 CODE:
1984 SvREFCNT_dec (SvRV (coro_current));
1985 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1986
1987void
1988_set_readyhook (SV *hook)
1989 PROTOTYPE: $
1990 CODE:
1991 LOCK;
1992 SvREFCNT_dec (coro_readyhook);
1993 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1994 UNLOCK;
1206 1995
1207int 1996int
1208prio (Coro::State coro, int newprio = 0) 1997prio (Coro::State coro, int newprio = 0)
1209 ALIAS: 1998 ALIAS:
1210 nice = 1 1999 nice = 1
… …
1213 RETVAL = coro->prio; 2002 RETVAL = coro->prio;
1214 2003
1215 if (items > 1) 2004 if (items > 1)
1216 { 2005 {
1217 if (ix) 2006 if (ix)
1218 newprio += coro->prio; 2007 newprio = coro->prio - newprio;
1219 2008
1220 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2009 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1221 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2010 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1222 2011
1223 coro->prio = newprio; 2012 coro->prio = newprio;
1224 } 2013 }
1225} 2014}
2015 OUTPUT:
2016 RETVAL
1226 2017
1227void 2018SV *
1228ready (SV *self) 2019ready (SV *self)
1229 PROTOTYPE: $ 2020 PROTOTYPE: $
1230 CODE: 2021 CODE:
1231 api_ready (self); 2022 RETVAL = boolSV (api_ready (self));
2023 OUTPUT:
2024 RETVAL
1232 2025
1233int 2026int
1234nready (...) 2027nready (...)
1235 PROTOTYPE: 2028 PROTOTYPE:
1236 CODE: 2029 CODE:
1237 RETVAL = coro_nready; 2030 RETVAL = coro_nready;
1238 OUTPUT: 2031 OUTPUT:
1239 RETVAL 2032 RETVAL
1240 2033
2034# for async_pool speedup
2035void
2036_pool_1 (SV *cb)
2037 CODE:
2038{
2039 struct coro *coro = SvSTATE (coro_current);
2040 HV *hv = (HV *)SvRV (coro_current);
2041 AV *defav = GvAV (PL_defgv);
2042 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2043 AV *invoke_av;
2044 int i, len;
2045
2046 if (!invoke)
2047 {
2048 SV *old = PL_diehook;
2049 PL_diehook = 0;
2050 SvREFCNT_dec (old);
2051 croak ("\3async_pool terminate\2\n");
2052 }
2053
2054 SvREFCNT_dec (coro->saved_deffh);
2055 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2056
2057 hv_store (hv, "desc", sizeof ("desc") - 1,
2058 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2059
2060 invoke_av = (AV *)SvRV (invoke);
2061 len = av_len (invoke_av);
2062
2063 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2064
2065 if (len > 0)
2066 {
2067 av_fill (defav, len - 1);
2068 for (i = 0; i < len; ++i)
2069 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2070 }
2071
2072 SvREFCNT_dec (invoke);
2073}
2074
2075void
2076_pool_2 (SV *cb)
2077 CODE:
2078{
2079 struct coro *coro = SvSTATE (coro_current);
2080
2081 sv_setsv (cb, &PL_sv_undef);
2082
2083 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2084 coro->saved_deffh = 0;
2085
2086 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2087 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2088 {
2089 SV *old = PL_diehook;
2090 PL_diehook = 0;
2091 SvREFCNT_dec (old);
2092 croak ("\3async_pool terminate\2\n");
2093 }
2094
2095 av_clear (GvAV (PL_defgv));
2096 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2097 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2098
2099 coro->prio = 0;
2100
2101 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2102 api_trace (coro_current, 0);
2103
2104 av_push (av_async_pool, newSVsv (coro_current));
2105}
2106
2107#if 0
2108
2109void
2110_generator_call (...)
2111 PROTOTYPE: @
2112 PPCODE:
2113 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2114 xxxx
2115 abort ();
2116
2117SV *
2118gensub (SV *sub, ...)
2119 PROTOTYPE: &;@
2120 CODE:
2121{
2122 struct coro *coro;
2123 MAGIC *mg;
2124 CV *xcv;
2125 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2126 int i;
2127
2128 CvGV (ncv) = CvGV (cv);
2129 CvFILE (ncv) = CvFILE (cv);
2130
2131 Newz (0, coro, 1, struct coro);
2132 coro->args = newAV ();
2133 coro->flags = CF_NEW;
2134
2135 av_extend (coro->args, items - 1);
2136 for (i = 1; i < items; i++)
2137 av_push (coro->args, newSVsv (ST (i)));
2138
2139 CvISXSUB_on (ncv);
2140 CvXSUBANY (ncv).any_ptr = (void *)coro;
2141
2142 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2143
2144 CvXSUB (ncv) = CvXSUB (xcv);
2145 CvANON_on (ncv);
2146
2147 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2148 RETVAL = newRV_noinc ((SV *)ncv);
2149}
2150 OUTPUT:
2151 RETVAL
2152
2153#endif
2154
2155
1241MODULE = Coro::State PACKAGE = Coro::AIO 2156MODULE = Coro::State PACKAGE = Coro::AIO
1242 2157
1243SV * 2158SV *
1244_get_state () 2159_get_state ()
1245 CODE: 2160 CODE:
1246{ 2161{
1247 struct { 2162 struct io_state *data;
1248 int errorno;
1249 int laststype;
1250 int laststatval;
1251 Stat_t statcache;
1252 } data;
1253 2163
2164 RETVAL = newSV (sizeof (struct io_state));
2165 data = (struct io_state *)SvPVX (RETVAL);
2166 SvCUR_set (RETVAL, sizeof (struct io_state));
2167 SvPOK_only (RETVAL);
2168
1254 data.errorno = errno; 2169 data->errorno = errno;
1255 data.laststype = PL_laststype; 2170 data->laststype = PL_laststype;
1256 data.laststatval = PL_laststatval; 2171 data->laststatval = PL_laststatval;
1257 data.statcache = PL_statcache; 2172 data->statcache = PL_statcache;
1258
1259 RETVAL = newSVpvn ((char *)&data, sizeof data);
1260} 2173}
1261 OUTPUT: 2174 OUTPUT:
1262 RETVAL 2175 RETVAL
1263 2176
1264void 2177void
1265_set_state (char *data_) 2178_set_state (char *data_)
1266 PROTOTYPE: $ 2179 PROTOTYPE: $
1267 CODE: 2180 CODE:
1268{ 2181{
1269 struct { 2182 struct io_state *data = (void *)data_;
1270 int errorno;
1271 int laststype;
1272 int laststatval;
1273 Stat_t statcache;
1274 } *data = (void *)data_;
1275 2183
1276 errno = data->errorno; 2184 errno = data->errorno;
1277 PL_laststype = data->laststype; 2185 PL_laststype = data->laststype;
1278 PL_laststatval = data->laststatval; 2186 PL_laststatval = data->laststatval;
1279 PL_statcache = data->statcache; 2187 PL_statcache = data->statcache;
1280} 2188}
2189
2190
2191MODULE = Coro::State PACKAGE = Coro::AnyEvent
2192
2193BOOT:
2194 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2195
2196SV *
2197_schedule (...)
2198 PROTOTYPE: @
2199 CODE:
2200{
2201 static int incede;
2202
2203 api_cede_notself ();
2204
2205 ++incede;
2206 while (coro_nready >= incede && api_cede ())
2207 ;
2208
2209 sv_setsv (sv_activity, &PL_sv_undef);
2210 if (coro_nready >= incede)
2211 {
2212 PUSHMARK (SP);
2213 PUTBACK;
2214 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2215 SPAGAIN;
2216 }
2217
2218 --incede;
2219}
2220

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