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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 1.241 by root, Mon Jul 21 02:39:15 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
234 SvREFCNT_dec (av);
235 365
236 return 0; 366 return 0;
237} 367}
238 368
239#define PERL_MAGIC_coro PERL_MAGIC_ext 369#define CORO_MAGIC_type_cv PERL_MAGIC_ext
370#define CORO_MAGIC_type_state PERL_MAGIC_ext
240 371
241static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 372static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0,
374 coro_cv_free
375};
376
377#define CORO_MAGIC(sv,type) \
378 SvMAGIC (sv) \
379 ? SvMAGIC (sv)->mg_type == type \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0
383
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
385#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
386
387static struct coro *
388SvSTATE_ (pTHX_ SV *coro)
389{
390 HV *stash;
391 MAGIC *mg;
392
393 if (SvROK (coro))
394 coro = SvRV (coro);
395
396 if (expect_false (SvTYPE (coro) != SVt_PVHV))
397 croak ("Coro::State object required");
398
399 stash = SvSTASH (coro);
400 if (expect_false (stash != coro_stash && stash != coro_state_stash))
401 {
402 /* very slow, but rare, check */
403 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
404 croak ("Coro::State object required");
405 }
406
407 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr;
409}
410
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
242 412
243/* the next two functions merely cache the padlists */ 413/* the next two functions merely cache the padlists */
244static void 414static void
245get_padlist (CV *cv) 415get_padlist (pTHX_ CV *cv)
246{ 416{
247 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 417 MAGIC *mg = CORO_MAGIC_cv (cv);
418 AV *av;
248 419
249 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
250 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
251 else 422 else
252 { 423 {
253#if 0 424#if CORO_PREFER_PERL_FUNCTIONS
254 /* this is probably cleaner, but also slower? */ 425 /* this is probably cleaner, but also slower? */
255 CV *cp = Perl_cv_clone (cv); 426 CV *cp = Perl_cv_clone (cv);
256 CvPADLIST (cv) = CvPADLIST (cp); 427 CvPADLIST (cv) = CvPADLIST (cp);
257 CvPADLIST (cp) = 0; 428 CvPADLIST (cp) = 0;
258 SvREFCNT_dec (cp); 429 SvREFCNT_dec (cp);
259#else 430#else
260 CvPADLIST (cv) = coro_clone_padlist (cv); 431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
261#endif 432#endif
262 } 433 }
263} 434}
264 435
265static void 436static void
266put_padlist (CV *cv) 437put_padlist (pTHX_ CV *cv)
267{ 438{
268 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 439 MAGIC *mg = CORO_MAGIC_cv (cv);
440 AV *av;
269 441
270 if (!mg) 442 if (expect_false (!mg))
271 { 443 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 }
277 444
278 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 445 av = (AV *)mg->mg_obj;
279}
280 446
281#define SB do { 447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
282#define SE } while (0) 448 av_extend (av, AvMAX (av) + 1);
283 449
284#define LOAD(state) load_state((state)); 450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285#define SAVE(state,flags) save_state((state),(flags)); 451}
286 452
287#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 453/** load & save, init *******************************************************/
288 454
289static void 455static void
290load_state(Coro__State c) 456load_perl (pTHX_ Coro__State c)
291{ 457{
292 PL_dowarn = c->dowarn; 458 perl_slots *slot = c->slot;
293 PL_in_eval = c->in_eval; 459 c->slot = 0;
294 460
295 PL_curstackinfo = c->curstackinfo;
296 PL_curstack = c->curstack;
297 PL_mainstack = c->mainstack; 461 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;
325 462
326 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 463 GvSV (PL_defgv) = slot->defsv;
327 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 464 GvAV (PL_defgv) = slot->defav;
328 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 465 GvSV (PL_errgv) = slot->errsv;
466 GvSV (irsgv) = slot->irsgv;
467
468 #define VAR(name,type) PL_ ## name = slot->name;
469 # include "state.h"
470 #undef VAR
329 471
330 { 472 {
331 dSP; 473 dSP;
474
332 CV *cv; 475 CV *cv;
333 476
334 /* now do the ugly restore mess */ 477 /* now do the ugly restore mess */
335 while ((cv = (CV *)POPs)) 478 while (expect_true (cv = (CV *)POPs))
336 { 479 {
337 AV *padlist = (AV *)POPs;
338
339 if (padlist)
340 {
341 put_padlist (cv); /* mark this padlist as available */ 480 put_padlist (aTHX_ cv); /* mark this padlist as available */
342 CvPADLIST(cv) = padlist; 481 CvDEPTH (cv) = PTR2IV (POPs);
343 } 482 CvPADLIST (cv) = (AV *)POPs;
344
345 ++CvDEPTH(cv);
346 } 483 }
347 484
348 PUTBACK; 485 PUTBACK;
349 } 486 }
350} 487}
351 488
352static void 489static void
353save_state(Coro__State c, int flags) 490save_perl (pTHX_ Coro__State c)
354{ 491{
355 { 492 {
356 dSP; 493 dSP;
357 I32 cxix = cxstack_ix; 494 I32 cxix = cxstack_ix;
358 PERL_CONTEXT *ccstk = cxstack; 495 PERL_CONTEXT *ccstk = cxstack;
… …
361 /* 498 /*
362 * the worst thing you can imagine happens first - we have to save 499 * the worst thing you can imagine happens first - we have to save
363 * (and reinitialize) all cv's in the whole callchain :( 500 * (and reinitialize) all cv's in the whole callchain :(
364 */ 501 */
365 502
366 PUSHs (Nullsv); 503 XPUSHs (Nullsv);
367 /* this loop was inspired by pp_caller */ 504 /* this loop was inspired by pp_caller */
368 for (;;) 505 for (;;)
369 { 506 {
370 while (cxix >= 0) 507 while (expect_true (cxix >= 0))
371 { 508 {
372 PERL_CONTEXT *cx = &ccstk[cxix--]; 509 PERL_CONTEXT *cx = &ccstk[cxix--];
373 510
374 if (CxTYPE(cx) == CXt_SUB) 511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
375 { 512 {
376 CV *cv = cx->blk_sub.cv; 513 CV *cv = cx->blk_sub.cv;
514
377 if (CvDEPTH(cv)) 515 if (expect_true (CvDEPTH (cv)))
378 { 516 {
379 EXTEND (SP, CvDEPTH(cv)*2); 517 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)); 518 PUSHs ((SV *)CvPADLIST (cv));
519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
389 PUSHs ((SV *)cv); 520 PUSHs ((SV *)cv);
390 521
522 CvDEPTH (cv) = 0;
391 get_padlist (cv); 523 get_padlist (aTHX_ cv);
392 } 524 }
393 } 525 }
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 } 526 }
403 527
404 if (top_si->si_type == PERLSI_MAIN) 528 if (expect_true (top_si->si_type == PERLSI_MAIN))
405 break; 529 break;
406 530
407 top_si = top_si->si_prev; 531 top_si = top_si->si_prev;
408 ccstk = top_si->si_cxstack; 532 ccstk = top_si->si_cxstack;
409 cxix = top_si->si_cxix; 533 cxix = top_si->si_cxix;
410 } 534 }
411 535
412 PUTBACK; 536 PUTBACK;
413 } 537 }
414 538
415 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 539 /* allocate some space on the context stack for our purposes */
416 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 540 /* we manually unroll here, as usually 2 slots is enough */
417 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 541 if (SLOT_COUNT >= 1) CXINC;
542 if (SLOT_COUNT >= 2) CXINC;
543 if (SLOT_COUNT >= 3) CXINC;
544 {
545 int i;
546 for (i = 3; i < SLOT_COUNT; ++i)
547 CXINC;
548 }
549 cxstack_ix -= SLOT_COUNT; /* undo allocation */
418 550
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; 551 c->mainstack = PL_mainstack;
425 c->stack_sp = PL_stack_sp; 552
426 c->op = PL_op; 553 {
427 c->curpad = PL_curpad; 554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
428 c->comppad = PL_comppad; 555
429 c->compcv = PL_compcv; 556 slot->defav = GvAV (PL_defgv);
430 c->stack_base = PL_stack_base; 557 slot->defsv = DEFSV;
431 c->stack_max = PL_stack_max; 558 slot->errsv = ERRSV;
432 c->tmps_stack = PL_tmps_stack; 559 slot->irsgv = GvSV (irsgv);
433 c->tmps_floor = PL_tmps_floor; 560
434 c->tmps_ix = PL_tmps_ix; 561 #define VAR(name,type) slot->name = PL_ ## name;
435 c->tmps_max = PL_tmps_max; 562 # include "state.h"
436 c->markstack = PL_markstack; 563 #undef VAR
437 c->markstack_ptr = PL_markstack_ptr; 564 }
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} 565}
453 566
454/* 567/*
455 * allocate various perl stacks. This is an exact copy 568 * allocate various perl stacks. This is an exact copy
456 * of perl.c:init_stacks, except that it uses less memory 569 * of perl.c:init_stacks, except that it uses less memory
457 * on the (sometimes correct) assumption that coroutines do 570 * on the (sometimes correct) assumption that coroutines do
458 * not usually need a lot of stackspace. 571 * not usually need a lot of stackspace.
459 */ 572 */
573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
460static void 576static void
461coro_init_stacks () 577coro_init_stacks (pTHX)
462{ 578{
463 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 579 PL_curstackinfo = new_stackinfo(32, 8);
464 PL_curstackinfo->si_type = PERLSI_MAIN; 580 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 581 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 583
468 PL_stack_base = AvARRAY(PL_curstack); 584 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 585 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 587
472 New(50,PL_tmps_stack,96,SV*); 588 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 589 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 590 PL_tmps_ix = -1;
475 PL_tmps_max = 96; 591 PL_tmps_max = 32;
476 592
477 New(54,PL_markstack,16,I32); 593 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 594 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 595 PL_markstack_max = PL_markstack + 16;
480 596
481#ifdef SET_MARK_OFFSET 597#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 598 SET_MARK_OFFSET;
483#endif 599#endif
484 600
485 New(54,PL_scopestack,16,I32); 601 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 602 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 603 PL_scopestack_max = 8;
488 604
489 New(54,PL_savestack,96,ANY); 605 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 606 PL_savestack_ix = 0;
491 PL_savestack_max = 96; 607 PL_savestack_max = 24;
492 608
493#if !PERL_VERSION_ATLEAST (5,9,0) 609#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,8,OP*); 610 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 611 PL_retstack_ix = 0;
496 PL_retstack_max = 8; 612 PL_retstack_max = 4;
497#endif 613#endif
498} 614}
615#endif
499 616
500/* 617/*
501 * destroy the stacks, the callchain etc... 618 * destroy the stacks, the callchain etc...
502 */ 619 */
503static void 620static void
504coro_destroy_stacks() 621coro_destroy_stacks (pTHX)
505{ 622{
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) 623 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 624 PL_curstackinfo = PL_curstackinfo->si_next;
519 625
520 while (PL_curstackinfo) 626 while (PL_curstackinfo)
521 { 627 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 628 PERL_SI *p = PL_curstackinfo->si_prev;
523 629
524 { /*D*//*remove*/
525 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */
528 }
529
530 if (!IN_DESTRUCT) 630 if (!IN_DESTRUCT)
531 {
532 dounwind (-1);/*D*//*remove*/
533 SvREFCNT_dec (PL_curstackinfo->si_stack); 631 SvREFCNT_dec (PL_curstackinfo->si_stack);
534 }
535 632
536 Safefree (PL_curstackinfo->si_cxstack); 633 Safefree (PL_curstackinfo->si_cxstack);
537 Safefree (PL_curstackinfo); 634 Safefree (PL_curstackinfo);
538 PL_curstackinfo = p; 635 PL_curstackinfo = p;
539 } 636 }
540 637
541 Safefree (PL_tmps_stack); 638 Safefree (PL_tmps_stack);
542 Safefree (PL_markstack); 639 Safefree (PL_markstack);
543 Safefree (PL_scopestack); 640 Safefree (PL_scopestack);
544 Safefree (PL_savestack); 641 Safefree (PL_savestack);
545#if !PERL_VERSION_ATLEAST (5,9,0) 642#if !PERL_VERSION_ATLEAST (5,10,0)
546 Safefree (PL_retstack); 643 Safefree (PL_retstack);
547#endif 644#endif
548} 645}
549 646
647static size_t
648coro_rss (pTHX_ struct coro *coro)
649{
650 size_t rss = sizeof (*coro);
651
652 if (coro->mainstack)
653 {
654 perl_slots tmp_slot;
655 perl_slots *slot;
656
657 if (coro->flags & CF_RUNNING)
658 {
659 slot = &tmp_slot;
660
661 #define VAR(name,type) slot->name = PL_ ## name;
662 # include "state.h"
663 #undef VAR
664 }
665 else
666 slot = coro->slot;
667
668 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY);
675
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *);
678#endif
679 }
680
681 return rss;
682}
683
684/** coroutine stack handling ************************************************/
685
686static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
687static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
688static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
689
690/* apparently < 5.8.8 */
691#ifndef MgPV_nolen_const
692#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
693 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
694 (const char*)(mg)->mg_ptr)
695#endif
696
697/*
698 * This overrides the default magic get method of %SIG elements.
699 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
700 * and instead of tryign to save and restore the hash elements, we just provide
701 * readback here.
702 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
703 * not expecting this to actually change the hook. This is a potential problem
704 * when a schedule happens then, but we ignore this.
705 */
706static int
707coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
708{
709 const char *s = MgPV_nolen_const (mg);
710
711 if (*s == '_')
712 {
713 SV **svp = 0;
714
715 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
716 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
717
718 if (svp)
719 {
720 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
721 return 0;
722 }
723 }
724
725 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
726}
727
728static int
729coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
730{
731 const char *s = MgPV_nolen_const (mg);
732
733 if (*s == '_')
734 {
735 SV **svp = 0;
736
737 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
738 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
739
740 if (svp)
741 {
742 SV *old = *svp;
743 *svp = 0;
744 SvREFCNT_dec (old);
745 return 0;
746 }
747 }
748
749 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
750}
751
752static int
753coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
754{
755 const char *s = MgPV_nolen_const (mg);
756
757 if (*s == '_')
758 {
759 SV **svp = 0;
760
761 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
762 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
763
764 if (svp)
765 {
766 SV *old = *svp;
767 *svp = newSVsv (sv);
768 SvREFCNT_dec (old);
769 return 0;
770 }
771 }
772
773 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
774}
775
550static void 776static void
551setup_coro (struct coro *coro) 777coro_setup (pTHX_ struct coro *coro)
552{ 778{
553 /* 779 /*
554 * emulate part of the perl startup here. 780 * emulate part of the perl startup here.
555 */ 781 */
556
557 coro_init_stacks (); 782 coro_init_stacks (aTHX);
558 783
784 PL_runops = RUNOPS_DEFAULT;
785 PL_curcop = &PL_compiling;
786 PL_in_eval = EVAL_NULL;
559 PL_curcop = 0; 787 PL_comppad = 0;
560 PL_in_eval = 0;
561 PL_curpm = 0; 788 PL_curpm = 0;
789 PL_curpad = 0;
790 PL_localizing = 0;
791 PL_dirty = 0;
792 PL_restartop = 0;
793#if PERL_VERSION_ATLEAST (5,10,0)
794 PL_parser = 0;
795#endif
796
797 /* recreate the die/warn hooks */
798 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
799 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
800
801 GvSV (PL_defgv) = newSV (0);
802 GvAV (PL_defgv) = coro->args; coro->args = 0;
803 GvSV (PL_errgv) = newSV (0);
804 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
805 PL_rs = newSVsv (GvSV (irsgv));
806 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
562 807
563 { 808 {
564 dSP; 809 dSP;
565 LOGOP myop; 810 LOGOP myop;
566 811
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); 812 Zero (&myop, 1, LOGOP);
574 myop.op_next = Nullop; 813 myop.op_next = Nullop;
575 myop.op_flags = OPf_WANT_VOID; 814 myop.op_flags = OPf_WANT_VOID;
576 815
816 PUSHMARK (SP);
817 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
818 PUTBACK;
577 PL_op = (OP *)&myop; 819 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); 820 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
583 SPAGAIN; 821 SPAGAIN;
584
585 ENTER; /* necessary e.g. for dounwind */
586 } 822 }
823
824 /* this newly created coroutine might be run on an existing cctx which most
825 * likely was suspended in set_stacklevel, called from entersub.
826 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
827 * so we ENTER here for symmetry
828 */
829 ENTER;
587} 830}
588 831
589static void 832static void
833coro_destroy (pTHX_ struct coro *coro)
834{
835 if (!IN_DESTRUCT)
836 {
837 /* restore all saved variables and stuff */
838 LEAVE_SCOPE (0);
839 assert (PL_tmps_floor == -1);
840
841 /* free all temporaries */
842 FREETMPS;
843 assert (PL_tmps_ix == -1);
844
845 /* unwind all extra stacks */
846 POPSTACK_TO (PL_mainstack);
847
848 /* unwind main stack */
849 dounwind (-1);
850 }
851
852 SvREFCNT_dec (GvSV (PL_defgv));
853 SvREFCNT_dec (GvAV (PL_defgv));
854 SvREFCNT_dec (GvSV (PL_errgv));
855 SvREFCNT_dec (PL_defoutgv);
856 SvREFCNT_dec (PL_rs);
857 SvREFCNT_dec (GvSV (irsgv));
858
859 SvREFCNT_dec (PL_diehook);
860 SvREFCNT_dec (PL_warnhook);
861
862 SvREFCNT_dec (coro->saved_deffh);
863 SvREFCNT_dec (coro->throw);
864
865 coro_destroy_stacks (aTHX);
866}
867
868static void
590free_coro_mortal () 869free_coro_mortal (pTHX)
591{ 870{
592 if (coro_mortal) 871 if (expect_true (coro_mortal))
593 { 872 {
594 SvREFCNT_dec (coro_mortal); 873 SvREFCNT_dec (coro_mortal);
595 coro_mortal = 0; 874 coro_mortal = 0;
596 } 875 }
597} 876}
598 877
878static int
879runops_trace (pTHX)
880{
881 COP *oldcop = 0;
882 int oldcxix = -2;
883 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
884 coro_cctx *cctx = coro->cctx;
885
886 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
887 {
888 PERL_ASYNC_CHECK ();
889
890 if (cctx->flags & CC_TRACE_ALL)
891 {
892 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
893 {
894 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
895 SV **bot, **top;
896 AV *av = newAV (); /* return values */
897 SV **cb;
898 dSP;
899
900 GV *gv = CvGV (cx->blk_sub.cv);
901 SV *fullname = sv_2mortal (newSV (0));
902 if (isGV (gv))
903 gv_efullname3 (fullname, gv, 0);
904
905 bot = PL_stack_base + cx->blk_oldsp + 1;
906 top = cx->blk_gimme == G_ARRAY ? SP + 1
907 : cx->blk_gimme == G_SCALAR ? bot + 1
908 : bot;
909
910 av_extend (av, top - bot);
911 while (bot < top)
912 av_push (av, SvREFCNT_inc (*bot++));
913
914 PL_runops = RUNOPS_DEFAULT;
915 ENTER;
916 SAVETMPS;
917 EXTEND (SP, 3);
918 PUSHMARK (SP);
919 PUSHs (&PL_sv_no);
920 PUSHs (fullname);
921 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
922 PUTBACK;
923 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
924 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
925 SPAGAIN;
926 FREETMPS;
927 LEAVE;
928 PL_runops = runops_trace;
929 }
930
931 if (oldcop != PL_curcop)
932 {
933 oldcop = PL_curcop;
934
935 if (PL_curcop != &PL_compiling)
936 {
937 SV **cb;
938
939 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
940 {
941 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
942
943 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
944 {
945 runops_proc_t old_runops = PL_runops;
946 dSP;
947 GV *gv = CvGV (cx->blk_sub.cv);
948 SV *fullname = sv_2mortal (newSV (0));
949
950 if (isGV (gv))
951 gv_efullname3 (fullname, gv, 0);
952
953 PL_runops = RUNOPS_DEFAULT;
954 ENTER;
955 SAVETMPS;
956 EXTEND (SP, 3);
957 PUSHMARK (SP);
958 PUSHs (&PL_sv_yes);
959 PUSHs (fullname);
960 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
961 PUTBACK;
962 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
963 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
964 SPAGAIN;
965 FREETMPS;
966 LEAVE;
967 PL_runops = runops_trace;
968 }
969
970 oldcxix = cxstack_ix;
971 }
972
973 if (cctx->flags & CC_TRACE_LINE)
974 {
975 dSP;
976
977 PL_runops = RUNOPS_DEFAULT;
978 ENTER;
979 SAVETMPS;
980 EXTEND (SP, 3);
981 PL_runops = RUNOPS_DEFAULT;
982 PUSHMARK (SP);
983 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
984 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
985 PUTBACK;
986 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
987 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
988 SPAGAIN;
989 FREETMPS;
990 LEAVE;
991 PL_runops = runops_trace;
992 }
993 }
994 }
995 }
996 }
997
998 TAINT_NOT;
999 return 0;
1000}
1001
1002/* inject a fake call to Coro::State::_cctx_init into the execution */
1003/* _cctx_init should be careful, as it could be called at almost any time */
1004/* during execution of a perl program */
599static void NOINLINE 1005static void NOINLINE
600prepare_cctx (coro_stack *cctx) 1006cctx_prepare (pTHX_ coro_cctx *cctx)
601{ 1007{
602 dSP; 1008 dSP;
603 LOGOP myop; 1009 LOGOP myop;
604 1010
1011 PL_top_env = &PL_start_env;
1012
1013 if (cctx->flags & CC_TRACE)
1014 PL_runops = runops_trace;
1015
605 Zero (&myop, 1, LOGOP); 1016 Zero (&myop, 1, LOGOP);
606 myop.op_next = PL_op; 1017 myop.op_next = PL_op;
607 myop.op_flags = OPf_WANT_VOID; 1018 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
608
609 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
610 1019
611 PUSHMARK (SP); 1020 PUSHMARK (SP);
1021 EXTEND (SP, 2);
1022 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
612 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE)); 1023 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
613 PUTBACK; 1024 PUTBACK;
1025 PL_op = (OP *)&myop;
614 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 1026 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
615 SPAGAIN; 1027 SPAGAIN;
616} 1028}
617 1029
1030/*
1031 * this is a _very_ stripped down perl interpreter ;)
1032 */
618static void 1033static void
619coro_run (void *arg) 1034cctx_run (void *arg)
620{ 1035{
1036 dTHX;
1037
621 /* coro_run is the alternative epilogue of transfer() */ 1038 /* cctx_run is the alternative tail of transfer(), so unlock here. */
622 UNLOCK; 1039 UNLOCK;
623 1040
1041 /* we now skip the entersub that lead to transfer() */
1042 PL_op = PL_op->op_next;
1043
1044 /* inject a fake subroutine call to cctx_init */
1045 cctx_prepare (aTHX_ (coro_cctx *)arg);
1046
1047 /* somebody or something will hit me for both perl_run and PL_restartop */
1048 PL_restartop = PL_op;
1049 perl_run (PL_curinterp);
1050
624 /* 1051 /*
625 * this is a _very_ stripped down perl interpreter ;) 1052 * If perl-run returns we assume exit() was being called or the coro
1053 * fell off the end, which seems to be the only valid (non-bug)
1054 * reason for perl_run to return. We try to exit by jumping to the
1055 * bootstrap-time "top" top_env, as we cannot restore the "main"
1056 * coroutine as Coro has no such concept
626 */ 1057 */
627 PL_top_env = &PL_start_env; 1058 PL_top_env = main_top_env;
628 /* inject call to cctx_init */ 1059 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} 1060}
637 1061
638static coro_stack * 1062static coro_cctx *
639stack_new () 1063cctx_new ()
640{ 1064{
641 coro_stack *stack; 1065 coro_cctx *cctx;
1066 void *stack_start;
1067 size_t stack_size;
642 1068
1069 ++cctx_count;
1070
643 New (0, stack, 1, coro_stack); 1071 Newz (0, cctx, 1, coro_cctx);
644 1072
645#if HAVE_MMAP 1073#if HAVE_MMAP
646
647 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1074 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
648 /* mmap suppsedly does allocate-on-write for us */ 1075 /* 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); 1076 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
650 1077
651 if (stack->sptr == (void *)-1) 1078 if (cctx->sptr != (void *)-1)
652 {
653 perror ("FATAL: unable to mmap stack for coroutine");
654 _exit (EXIT_FAILURE);
655 } 1079 {
656
657# if STACKGUARD 1080# if CORO_STACKGUARD
658 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1081 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
659# endif 1082# endif
660 1083 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
661#else 1084 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
662 1085 cctx->flags |= CC_MAPPED;
663 stack->ssize = STACKSIZE * (long)sizeof (long);
664 New (0, stack->sptr, STACKSIZE, long);
665
666 if (!stack->sptr)
667 { 1086 }
1087 else
1088#endif
1089 {
1090 cctx->ssize = coro_stacksize * (long)sizeof (long);
1091 New (0, cctx->sptr, coro_stacksize, long);
1092
1093 if (!cctx->sptr)
1094 {
668 perror (stderr, "FATAL: unable to malloc stack for coroutine"); 1095 perror ("FATAL: unable to allocate stack for coroutine");
669 _exit (EXIT_FAILURE); 1096 _exit (EXIT_FAILURE);
670 } 1097 }
671 1098
672#endif 1099 stack_start = cctx->sptr;
1100 stack_size = cctx->ssize;
1101 }
673 1102
674#if USE_VALGRIND 1103 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
675 stack->valgrind_id = VALGRIND_STACK_REGISTER ( 1104 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 1105
681 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
682
683 return stack; 1106 return cctx;
684} 1107}
685 1108
686static void 1109static void
687stack_free (coro_stack *stack) 1110cctx_destroy (coro_cctx *cctx)
688{ 1111{
689 if (!stack) 1112 if (!cctx)
690 return; 1113 return;
691 1114
1115 --cctx_count;
1116
692#if USE_VALGRIND 1117#if CORO_USE_VALGRIND
693 VALGRIND_STACK_DEREGISTER (stack->valgrind_id); 1118 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
694#endif 1119#endif
695 1120
696#if HAVE_MMAP 1121#if HAVE_MMAP
1122 if (cctx->flags & CC_MAPPED)
697 munmap (stack->sptr, stack->ssize); 1123 munmap (cctx->sptr, cctx->ssize);
698#else 1124 else
1125#endif
699 Safefree (stack->sptr); 1126 Safefree (cctx->sptr);
700#endif
701 1127
702 Safefree (stack); 1128 Safefree (cctx);
703} 1129}
704 1130
705static coro_stack *stack_first; 1131/* wether this cctx should be destructed */
706static int cctx_count, cctx_idle; 1132#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
707 1133
708static coro_stack * 1134static coro_cctx *
709stack_get () 1135cctx_get (pTHX)
710{ 1136{
711 coro_stack *stack; 1137 while (expect_true (cctx_first))
712
713 if (stack_first)
714 { 1138 {
1139 coro_cctx *cctx = cctx_first;
1140 cctx_first = cctx->next;
715 --cctx_idle; 1141 --cctx_idle;
716 stack = stack_first; 1142
717 stack_first = stack->next; 1143 if (expect_true (!CCTX_EXPIRED (cctx)))
718 } 1144 return cctx;
719 else 1145
720 { 1146 cctx_destroy (cctx);
721 ++cctx_count;
722 stack = stack_new ();
723 PL_op = PL_op->op_next;
724 } 1147 }
725 1148
726 return stack; 1149 return cctx_new ();
727} 1150}
728 1151
729static void 1152static void
730stack_put (coro_stack *stack) 1153cctx_put (coro_cctx *cctx)
731{ 1154{
1155 /* free another cctx if overlimit */
1156 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1157 {
1158 coro_cctx *first = cctx_first;
1159 cctx_first = first->next;
1160 --cctx_idle;
1161
1162 cctx_destroy (first);
1163 }
1164
732 ++cctx_idle; 1165 ++cctx_idle;
733 stack->next = stack_first; 1166 cctx->next = cctx_first;
734 stack_first = stack; 1167 cctx_first = cctx;
735} 1168}
736 1169
737/* never call directly, always through the coro_state_transfer global variable */ 1170/** coroutine switching *****************************************************/
1171
1172static void
1173transfer_check (pTHX_ struct coro *prev, struct coro *next)
1174{
1175 if (expect_true (prev != next))
1176 {
1177 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1178 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1179
1180 if (expect_false (next->flags & CF_RUNNING))
1181 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1182
1183 if (expect_false (next->flags & CF_DESTROYED))
1184 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1185
1186#if !PERL_VERSION_ATLEAST (5,10,0)
1187 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1188 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1189#endif
1190 }
1191}
1192
1193/* always use the TRANSFER macro */
738static void NOINLINE 1194static void NOINLINE
739transfer (struct coro *prev, struct coro *next, int flags) 1195transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
740{ 1196{
741 dSTACKLEVEL; 1197 dSTACKLEVEL;
1198 static volatile int has_throw;
742 1199
743 /* sometimes transfer is only called to set idle_sp */ 1200 /* sometimes transfer is only called to set idle_sp */
744 if (flags == TRANSFER_SET_STACKLEVEL) 1201 if (expect_false (!next))
1202 {
745 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1203 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
746 else if (prev != next) 1204 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747 { 1205 }
1206 else if (expect_true (prev != next))
1207 {
748 coro_stack *prev__stack; 1208 coro_cctx *prev__cctx;
1209
1210 if (expect_false (prev->flags & CF_NEW))
1211 {
1212 /* create a new empty context */
1213 Newz (0, prev->cctx, 1, coro_cctx);
1214 prev->flags &= ~CF_NEW;
1215 prev->flags |= CF_RUNNING;
1216 }
1217
1218 prev->flags &= ~CF_RUNNING;
1219 next->flags |= CF_RUNNING;
749 1220
750 LOCK; 1221 LOCK;
751 1222
752 if (next->mainstack) 1223 /* first get rid of the old state */
1224 save_perl (aTHX_ prev);
1225
1226 if (expect_false (next->flags & CF_NEW))
753 { 1227 {
754 /* coroutine already started */ 1228 /* need to start coroutine */
755 SAVE (prev, flags); 1229 next->flags &= ~CF_NEW;
756 LOAD (next); 1230 /* setup coroutine call */
1231 coro_setup (aTHX_ next);
757 } 1232 }
758 else 1233 else
1234 load_perl (aTHX_ next);
1235
1236 prev__cctx = prev->cctx;
1237
1238 /* possibly "free" the cctx */
1239 if (expect_true (
1240 prev__cctx->idle_sp == STACKLEVEL
1241 && !(prev__cctx->flags & CC_TRACE)
1242 && !force_cctx
1243 ))
759 { 1244 {
760 /* need to start coroutine */ 1245 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
761 /* first get rid of the old state */ 1246 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
762 SAVE (prev, -1); 1247
763 /* setup coroutine call */ 1248 prev->cctx = 0;
764 setup_coro (next); 1249
765 /* need a stack */ 1250 /* 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; 1251 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1252 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1253 if (!next->cctx)
1254 next->cctx = cctx_get (aTHX);
1255
1256 cctx_put (prev__cctx);
767 } 1257 }
768 1258
769 if (!prev->stack) 1259 ++next->usecount;
770 /* create a new empty context */
771 Newz (0, prev->stack, 1, coro_stack);
772 1260
773 prev__stack = prev->stack; 1261 if (expect_true (!next->cctx))
1262 next->cctx = cctx_get (aTHX);
774 1263
775 /* possibly "free" the stack */ 1264 has_throw = !!next->throw;
776 if (prev__stack->idle_sp == STACKLEVEL) 1265
1266 if (expect_false (prev__cctx != next->cctx))
777 { 1267 {
778 stack_put (prev__stack); 1268 prev__cctx->top_env = PL_top_env;
779 prev->stack = 0; 1269 PL_top_env = next->cctx->top_env;
1270 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
780 } 1271 }
781 1272
782 if (!next->stack) 1273 free_coro_mortal (aTHX);
783 next->stack = stack_get (); 1274 UNLOCK;
784 1275
785 if (prev__stack != next->stack) 1276 if (expect_false (has_throw))
786 { 1277 {
787 prev__stack->top_env = PL_top_env; 1278 struct coro *coro = SvSTATE (coro_current);
788 PL_top_env = next->stack->top_env; 1279
789 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1280 if (coro->throw)
1281 {
1282 SV *exception = coro->throw;
1283 coro->throw = 0;
1284 sv_setsv (ERRSV, exception);
1285 croak (0);
1286 }
790 } 1287 }
1288 }
1289}
791 1290
792 free_coro_mortal (); 1291struct transfer_args
1292{
1293 struct coro *prev, *next;
1294};
793 1295
1296#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1297#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1298
1299/** high level stuff ********************************************************/
1300
1301static int
1302coro_state_destroy (pTHX_ struct coro *coro)
1303{
1304 if (coro->flags & CF_DESTROYED)
1305 return 0;
1306
1307 coro->flags |= CF_DESTROYED;
1308
1309 if (coro->flags & CF_READY)
1310 {
1311 /* reduce nready, as destroying a ready coro effectively unreadies it */
1312 /* alternative: look through all ready queues and remove the coro */
1313 LOCK;
1314 --coro_nready;
794 UNLOCK; 1315 UNLOCK;
795 } 1316 }
796} 1317 else
797 1318 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 1319
812 if (coro->mainstack && coro->mainstack != main_mainstack) 1320 if (coro->mainstack && coro->mainstack != main_mainstack)
813 { 1321 {
814 struct coro temp; 1322 struct coro temp;
815 1323
816 SAVE ((&temp), TRANSFER_SAVE_ALL); 1324 if (coro->flags & CF_RUNNING)
817 LOAD (coro); 1325 croak ("FATAL: tried to destroy currently running coroutine");
818 1326
819 coro_destroy_stacks (); 1327 save_perl (aTHX_ &temp);
1328 load_perl (aTHX_ coro);
820 1329
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1330 coro_destroy (aTHX_ coro);
822 1331
1332 load_perl (aTHX_ &temp);
1333
823 coro->mainstack = 0; 1334 coro->slot = 0;
824 } 1335 }
825 1336
826 stack_free (coro->stack); 1337 cctx_destroy (coro->cctx);
827 SvREFCNT_dec (coro->args); 1338 SvREFCNT_dec (coro->args);
828 Safefree (coro); 1339
1340 if (coro->next) coro->next->prev = coro->prev;
1341 if (coro->prev) coro->prev->next = coro->next;
1342 if (coro == coro_first) coro_first = coro->next;
1343
1344 return 1;
829} 1345}
830 1346
831static int 1347static int
832coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1348coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833{ 1349{
834 struct coro *coro = (struct coro *)mg->mg_ptr; 1350 struct coro *coro = (struct coro *)mg->mg_ptr;
835 mg->mg_ptr = 0; 1351 mg->mg_ptr = 0;
836 1352
1353 coro->hv = 0;
1354
1355 if (--coro->refcnt < 0)
1356 {
837 coro_state_destroy (coro); 1357 coro_state_destroy (aTHX_ coro);
1358 Safefree (coro);
1359 }
838 1360
839 return 0; 1361 return 0;
840} 1362}
841 1363
842static int 1364static int
… …
849 return 0; 1371 return 0;
850} 1372}
851 1373
852static MGVTBL coro_state_vtbl = { 1374static MGVTBL coro_state_vtbl = {
853 0, 0, 0, 0, 1375 0, 0, 0, 0,
854 coro_state_clear, 1376 coro_state_free,
855 0, 1377 0,
856#ifdef MGf_DUP 1378#ifdef MGf_DUP
857 coro_state_dup, 1379 coro_state_dup,
858#else 1380#else
859# define MGf_DUP 0 1381# define MGf_DUP 0
860#endif 1382#endif
861}; 1383};
862 1384
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 1385static void
886prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1386prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
887{ 1387{
888 ta->prev = SvSTATE (prev); 1388 ta->prev = SvSTATE (prev_sv);
889 ta->next = SvSTATE (next); 1389 ta->next = SvSTATE (next_sv);
890 ta->flags = flags; 1390 TRANSFER_CHECK (*ta);
891} 1391}
892 1392
893static void 1393static void
894api_transfer (SV *prev, SV *next, int flags) 1394api_transfer (SV *prev_sv, SV *next_sv)
895{ 1395{
896 dTHX; 1396 dTHX;
897 struct transfer_args ta; 1397 struct transfer_args ta;
898 1398
899 prepare_transfer (&ta, prev, next, flags); 1399 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900 TRANSFER (ta); 1400 TRANSFER (ta, 1);
901} 1401}
902 1402
903/** Coro ********************************************************************/ 1403/** Coro ********************************************************************/
904 1404
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 1405static void
918coro_enq (SV *sv) 1406coro_enq (pTHX_ SV *coro_sv)
1407{
1408 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1409}
1410
1411static SV *
1412coro_deq (pTHX)
919{ 1413{
920 int prio; 1414 int prio;
921 1415
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; ) 1416 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
941 if (AvFILLp (coro_ready [prio]) >= 0) 1417 if (AvFILLp (coro_ready [prio]) >= 0)
942 {
943 coro_nready--;
944 return av_shift (coro_ready [prio]); 1418 return av_shift (coro_ready [prio]);
945 }
946 1419
947 return 0; 1420 return 0;
948} 1421}
949 1422
1423static int
1424api_ready (SV *coro_sv)
1425{
1426 dTHX;
1427 struct coro *coro;
1428 SV *sv_hook;
1429 void (*xs_hook)(void);
1430
1431 if (SvROK (coro_sv))
1432 coro_sv = SvRV (coro_sv);
1433
1434 coro = SvSTATE (coro_sv);
1435
1436 if (coro->flags & CF_READY)
1437 return 0;
1438
1439 coro->flags |= CF_READY;
1440
1441 LOCK;
1442
1443 sv_hook = coro_nready ? 0 : coro_readyhook;
1444 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1445
1446 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1447 ++coro_nready;
1448
1449 UNLOCK;
1450
1451 if (sv_hook)
1452 {
1453 dSP;
1454
1455 ENTER;
1456 SAVETMPS;
1457
1458 PUSHMARK (SP);
1459 PUTBACK;
1460 call_sv (sv_hook, G_DISCARD);
1461 SPAGAIN;
1462
1463 FREETMPS;
1464 LEAVE;
1465 }
1466
1467 if (xs_hook)
1468 xs_hook ();
1469
1470 return 1;
1471}
1472
1473static int
1474api_is_ready (SV *coro_sv)
1475{
1476 dTHX;
1477 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1478}
1479
950static void 1480static void
951api_ready (SV *coro) 1481prepare_schedule (pTHX_ struct transfer_args *ta)
952{ 1482{
953 dTHX; 1483 SV *prev_sv, *next_sv;
954 1484
955 if (SvROK (coro)) 1485 for (;;)
956 coro = SvRV (coro); 1486 {
1487 LOCK;
1488 next_sv = coro_deq (aTHX);
1489
1490 /* nothing to schedule: call the idle handler */
1491 if (expect_false (!next_sv))
1492 {
1493 dSP;
1494 UNLOCK;
1495
1496 ENTER;
1497 SAVETMPS;
1498
1499 PUSHMARK (SP);
1500 PUTBACK;
1501 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1502 SPAGAIN;
1503
1504 FREETMPS;
1505 LEAVE;
1506 continue;
1507 }
1508
1509 ta->next = SvSTATE (next_sv);
1510
1511 /* cannot transfer to destroyed coros, skip and look for next */
1512 if (expect_false (ta->next->flags & CF_DESTROYED))
1513 {
1514 UNLOCK;
1515 SvREFCNT_dec (next_sv);
1516 /* coro_nready is already taken care of by destroy */
1517 continue;
1518 }
1519
1520 --coro_nready;
1521 UNLOCK;
1522 break;
1523 }
1524
1525 /* free this only after the transfer */
1526 prev_sv = SvRV (coro_current);
1527 ta->prev = SvSTATE (prev_sv);
1528 TRANSFER_CHECK (*ta);
1529 assert (ta->next->flags & CF_READY);
1530 ta->next->flags &= ~CF_READY;
1531 SvRV_set (coro_current, next_sv);
957 1532
958 LOCK; 1533 LOCK;
959 coro_enq (SvREFCNT_inc (coro)); 1534 free_coro_mortal (aTHX);
1535 coro_mortal = prev_sv;
960 UNLOCK; 1536 UNLOCK;
961} 1537}
962 1538
963static void 1539static 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) 1540prepare_cede (pTHX_ struct transfer_args *ta)
1010{ 1541{
1011 LOCK; 1542 api_ready (coro_current);
1012 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1013 UNLOCK;
1014
1015 prepare_schedule (ta); 1543 prepare_schedule (aTHX_ ta);
1544}
1545
1546static int
1547prepare_cede_notself (pTHX_ struct transfer_args *ta)
1548{
1549 if (coro_nready)
1550 {
1551 SV *prev = SvRV (coro_current);
1552 prepare_schedule (aTHX_ ta);
1553 api_ready (prev);
1554 return 1;
1555 }
1556 else
1557 return 0;
1016} 1558}
1017 1559
1018static void 1560static void
1019api_schedule (void) 1561api_schedule (void)
1020{ 1562{
1021 dTHX; 1563 dTHX;
1022 struct transfer_args ta; 1564 struct transfer_args ta;
1023 1565
1024 prepare_schedule (&ta); 1566 prepare_schedule (aTHX_ &ta);
1025 TRANSFER (ta); 1567 TRANSFER (ta, 1);
1026} 1568}
1027 1569
1028static void 1570static int
1029api_cede (void) 1571api_cede (void)
1030{ 1572{
1031 dTHX; 1573 dTHX;
1032 struct transfer_args ta; 1574 struct transfer_args ta;
1033 1575
1034 prepare_cede (&ta); 1576 prepare_cede (aTHX_ &ta);
1577
1578 if (expect_true (ta.prev != ta.next))
1579 {
1035 TRANSFER (ta); 1580 TRANSFER (ta, 1);
1581 return 1;
1582 }
1583 else
1584 return 0;
1036} 1585}
1037 1586
1587static int
1588api_cede_notself (void)
1589{
1590 dTHX;
1591 struct transfer_args ta;
1592
1593 if (prepare_cede_notself (aTHX_ &ta))
1594 {
1595 TRANSFER (ta, 1);
1596 return 1;
1597 }
1598 else
1599 return 0;
1600}
1601
1602static void
1603api_trace (SV *coro_sv, int flags)
1604{
1605 dTHX;
1606 struct coro *coro = SvSTATE (coro_sv);
1607
1608 if (flags & CC_TRACE)
1609 {
1610 if (!coro->cctx)
1611 coro->cctx = cctx_new ();
1612 else if (!(coro->cctx->flags & CC_TRACE))
1613 croak ("cannot enable tracing on coroutine with custom stack");
1614
1615 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1616 }
1617 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1618 {
1619 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1620
1621 if (coro->flags & CF_RUNNING)
1622 PL_runops = RUNOPS_DEFAULT;
1623 else
1624 coro->slot->runops = RUNOPS_DEFAULT;
1625 }
1626}
1627
1038MODULE = Coro::State PACKAGE = Coro::State 1628MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1039 1629
1040PROTOTYPES: DISABLE 1630PROTOTYPES: DISABLE
1041 1631
1042BOOT: 1632BOOT:
1043{ 1633{
1044#ifdef USE_ITHREADS 1634#ifdef USE_ITHREADS
1045 MUTEX_INIT (&coro_mutex); 1635 MUTEX_INIT (&coro_mutex);
1046#endif 1636#endif
1047 BOOT_PAGESIZE; 1637 BOOT_PAGESIZE;
1048 1638
1639 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1640 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1641
1642 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1643 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1644 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1645
1646 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1647 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1648 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1649
1049 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1650 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1050 1651
1051 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1652 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1052 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1653 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1053 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1654 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1655 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1054 1656
1055 main_mainstack = PL_mainstack; 1657 main_mainstack = PL_mainstack;
1658 main_top_env = PL_top_env;
1056 1659
1660 while (main_top_env->je_prev)
1661 main_top_env = main_top_env->je_prev;
1662
1057 coroapi.ver = CORO_API_VERSION; 1663 coroapi.ver = CORO_API_VERSION;
1664 coroapi.rev = CORO_API_REVISION;
1058 coroapi.transfer = api_transfer; 1665 coroapi.transfer = api_transfer;
1059 1666
1060 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1667 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1061} 1668}
1062 1669
1063SV * 1670SV *
1064new (char *klass, ...) 1671new (char *klass, ...)
1065 CODE: 1672 CODE:
1066{ 1673{
1067 struct coro *coro; 1674 struct coro *coro;
1675 MAGIC *mg;
1068 HV *hv; 1676 HV *hv;
1069 int i; 1677 int i;
1070 1678
1071 Newz (0, coro, 1, struct coro); 1679 Newz (0, coro, 1, struct coro);
1072 coro->args = newAV (); 1680 coro->args = newAV ();
1681 coro->flags = CF_NEW;
1073 1682
1683 if (coro_first) coro_first->prev = coro;
1684 coro->next = coro_first;
1685 coro_first = coro;
1686
1074 hv = newHV (); 1687 coro->hv = hv = newHV ();
1075 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1688 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1689 mg->mg_flags |= MGf_DUP;
1076 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1690 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1077 1691
1692 av_extend (coro->args, items - 1);
1078 for (i = 1; i < items; i++) 1693 for (i = 1; i < items; i++)
1079 av_push (coro->args, newSVsv (ST (i))); 1694 av_push (coro->args, newSVsv (ST (i)));
1080
1081 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1082 /*coro->stack = 0;*/
1083} 1695}
1084 OUTPUT: 1696 OUTPUT:
1085 RETVAL 1697 RETVAL
1086 1698
1699# these not obviously related functions are all rolled into the same xs
1700# function to increase chances that they all will call transfer with the same
1701# stack offset
1087void 1702void
1088_set_stacklevel (...) 1703_set_stacklevel (...)
1089 ALIAS: 1704 ALIAS:
1090 Coro::State::transfer = 1 1705 Coro::State::transfer = 1
1091 Coro::schedule = 2 1706 Coro::schedule = 2
1092 Coro::cede = 3 1707 Coro::cede = 3
1093 Coro::Cont::yield = 4 1708 Coro::cede_notself = 4
1094 CODE: 1709 CODE:
1095{ 1710{
1096 struct transfer_args ta; 1711 struct transfer_args ta;
1097 1712
1713 PUTBACK;
1098 switch (ix) 1714 switch (ix)
1099 { 1715 {
1100 case 0: 1716 case 0:
1101 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1717 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102 ta.next = 0; 1718 ta.next = 0;
1103 ta.flags = TRANSFER_SET_STACKLEVEL;
1104 break; 1719 break;
1105 1720
1106 case 1: 1721 case 1:
1107 if (items != 3) 1722 if (items != 2)
1108 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1723 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109 1724
1110 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1725 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111 break; 1726 break;
1112 1727
1113 case 2: 1728 case 2:
1114 prepare_schedule (&ta); 1729 prepare_schedule (aTHX_ &ta);
1115 break; 1730 break;
1116 1731
1117 case 3: 1732 case 3:
1118 prepare_cede (&ta); 1733 prepare_cede (aTHX_ &ta);
1119 break; 1734 break;
1120 1735
1121 case 4: 1736 case 4:
1122 { 1737 if (!prepare_cede_notself (aTHX_ &ta))
1123 SV *yieldstack; 1738 XSRETURN_EMPTY;
1124 SV *sv;
1125 AV *defav = GvAV (PL_defgv);
1126 1739
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; 1740 break;
1146
1147 } 1741 }
1742 SPAGAIN;
1148 1743
1744 BARRIER;
1745 PUTBACK;
1149 TRANSFER (ta); 1746 TRANSFER (ta, 0);
1747 SPAGAIN; /* might be the sp of a different coroutine now */
1748 /* be extra careful not to ever do anything after TRANSFER */
1150} 1749}
1750
1751bool
1752_destroy (SV *coro_sv)
1753 CODE:
1754 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1755 OUTPUT:
1756 RETVAL
1151 1757
1152void 1758void
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) 1759_exit (int code)
1166 int code
1167 PROTOTYPE: $ 1760 PROTOTYPE: $
1168 CODE: 1761 CODE:
1169 _exit (code); 1762 _exit (code);
1170 1763
1764int
1765cctx_stacksize (int new_stacksize = 0)
1766 CODE:
1767 RETVAL = coro_stacksize;
1768 if (new_stacksize)
1769 coro_stacksize = new_stacksize;
1770 OUTPUT:
1771 RETVAL
1772
1773int
1774cctx_count ()
1775 CODE:
1776 RETVAL = cctx_count;
1777 OUTPUT:
1778 RETVAL
1779
1780int
1781cctx_idle ()
1782 CODE:
1783 RETVAL = cctx_idle;
1784 OUTPUT:
1785 RETVAL
1786
1787void
1788list ()
1789 PPCODE:
1790{
1791 struct coro *coro;
1792 for (coro = coro_first; coro; coro = coro->next)
1793 if (coro->hv)
1794 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1795}
1796
1797void
1798call (Coro::State coro, SV *coderef)
1799 ALIAS:
1800 eval = 1
1801 CODE:
1802{
1803 if (coro->mainstack)
1804 {
1805 struct coro temp;
1806
1807 if (!(coro->flags & CF_RUNNING))
1808 {
1809 PUTBACK;
1810 save_perl (aTHX_ &temp);
1811 load_perl (aTHX_ coro);
1812 }
1813
1814 {
1815 dSP;
1816 ENTER;
1817 SAVETMPS;
1818 PUTBACK;
1819 PUSHSTACK;
1820 PUSHMARK (SP);
1821
1822 if (ix)
1823 eval_sv (coderef, 0);
1824 else
1825 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1826
1827 POPSTACK;
1828 SPAGAIN;
1829 FREETMPS;
1830 LEAVE;
1831 PUTBACK;
1832 }
1833
1834 if (!(coro->flags & CF_RUNNING))
1835 {
1836 save_perl (aTHX_ coro);
1837 load_perl (aTHX_ &temp);
1838 SPAGAIN;
1839 }
1840 }
1841}
1842
1843SV *
1844is_ready (Coro::State coro)
1845 PROTOTYPE: $
1846 ALIAS:
1847 is_ready = CF_READY
1848 is_running = CF_RUNNING
1849 is_new = CF_NEW
1850 is_destroyed = CF_DESTROYED
1851 CODE:
1852 RETVAL = boolSV (coro->flags & ix);
1853 OUTPUT:
1854 RETVAL
1855
1856void
1857api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1858
1859SV *
1860has_cctx (Coro::State coro)
1861 PROTOTYPE: $
1862 CODE:
1863 RETVAL = boolSV (!!coro->cctx);
1864 OUTPUT:
1865 RETVAL
1866
1867int
1868is_traced (Coro::State coro)
1869 PROTOTYPE: $
1870 CODE:
1871 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1872 OUTPUT:
1873 RETVAL
1874
1875IV
1876rss (Coro::State coro)
1877 PROTOTYPE: $
1878 ALIAS:
1879 usecount = 1
1880 CODE:
1881 switch (ix)
1882 {
1883 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1884 case 1: RETVAL = coro->usecount; break;
1885 }
1886 OUTPUT:
1887 RETVAL
1888
1889void
1890force_cctx ()
1891 CODE:
1892 struct coro *coro = SvSTATE (coro_current);
1893 coro->cctx->idle_sp = 0;
1894
1171MODULE = Coro::State PACKAGE = Coro 1895MODULE = Coro::State PACKAGE = Coro
1172 1896
1173BOOT: 1897BOOT:
1174{ 1898{
1175 int i; 1899 int i;
1176 1900
1901 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1902 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1903 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1904
1905 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1906 SvREADONLY_on (coro_current);
1907
1177 coro_stash = gv_stashpv ("Coro", TRUE); 1908 coro_stash = gv_stashpv ("Coro", TRUE);
1178 1909
1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1910 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1911 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1912 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1913 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1914 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1915 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185 1916
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--; ) 1917 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190 coro_ready[i] = newAV (); 1918 coro_ready[i] = newAV ();
1191 1919
1192 { 1920 {
1193 SV *sv = perl_get_sv("Coro::API", 1); 1921 SV *sv = perl_get_sv ("Coro::API", TRUE);
1922 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1194 1923
1195 coroapi.schedule = api_schedule; 1924 coroapi.schedule = api_schedule;
1196 coroapi.cede = api_cede; 1925 coroapi.cede = api_cede;
1926 coroapi.cede_notself = api_cede_notself;
1197 coroapi.ready = api_ready; 1927 coroapi.ready = api_ready;
1928 coroapi.is_ready = api_is_ready;
1198 coroapi.nready = &coro_nready; 1929 coroapi.nready = &coro_nready;
1199 coroapi.current = coro_current; 1930 coroapi.current = coro_current;
1200 1931
1201 GCoroAPI = &coroapi; 1932 GCoroAPI = &coroapi;
1202 sv_setiv (sv, (IV)&coroapi); 1933 sv_setiv (sv, (IV)&coroapi);
1203 SvREADONLY_on (sv); 1934 SvREADONLY_on (sv);
1204 } 1935 }
1205} 1936}
1937
1938void
1939_set_current (SV *current)
1940 PROTOTYPE: $
1941 CODE:
1942 SvREFCNT_dec (SvRV (coro_current));
1943 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1944
1945void
1946_set_readyhook (SV *hook)
1947 PROTOTYPE: $
1948 CODE:
1949 LOCK;
1950 SvREFCNT_dec (coro_readyhook);
1951 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1952 UNLOCK;
1206 1953
1207int 1954int
1208prio (Coro::State coro, int newprio = 0) 1955prio (Coro::State coro, int newprio = 0)
1209 ALIAS: 1956 ALIAS:
1210 nice = 1 1957 nice = 1
… …
1213 RETVAL = coro->prio; 1960 RETVAL = coro->prio;
1214 1961
1215 if (items > 1) 1962 if (items > 1)
1216 { 1963 {
1217 if (ix) 1964 if (ix)
1218 newprio += coro->prio; 1965 newprio = coro->prio - newprio;
1219 1966
1220 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 1967 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1221 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 1968 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1222 1969
1223 coro->prio = newprio; 1970 coro->prio = newprio;
1224 } 1971 }
1225} 1972}
1973 OUTPUT:
1974 RETVAL
1226 1975
1227void 1976SV *
1228ready (SV *self) 1977ready (SV *self)
1229 PROTOTYPE: $ 1978 PROTOTYPE: $
1230 CODE: 1979 CODE:
1231 api_ready (self); 1980 RETVAL = boolSV (api_ready (self));
1981 OUTPUT:
1982 RETVAL
1232 1983
1233int 1984int
1234nready (...) 1985nready (...)
1235 PROTOTYPE: 1986 PROTOTYPE:
1236 CODE: 1987 CODE:
1237 RETVAL = coro_nready; 1988 RETVAL = coro_nready;
1238 OUTPUT: 1989 OUTPUT:
1239 RETVAL 1990 RETVAL
1240 1991
1992void
1993throw (Coro::State self, SV *throw = &PL_sv_undef)
1994 PROTOTYPE: $;$
1995 CODE:
1996 SvREFCNT_dec (self->throw);
1997 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1998
1999void
2000swap_defsv (Coro::State self)
2001 PROTOTYPE: $
2002 ALIAS:
2003 swap_defav = 1
2004 CODE:
2005 if (!self->slot)
2006 croak ("cannot swap state with coroutine that has no saved state");
2007 else
2008 {
2009 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2010 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2011
2012 SV *tmp = *src; *src = *dst; *dst = tmp;
2013 }
2014
2015# for async_pool speedup
2016void
2017_pool_1 (SV *cb)
2018 CODE:
2019{
2020 struct coro *coro = SvSTATE (coro_current);
2021 HV *hv = (HV *)SvRV (coro_current);
2022 AV *defav = GvAV (PL_defgv);
2023 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2024 AV *invoke_av;
2025 int i, len;
2026
2027 if (!invoke)
2028 {
2029 SV *old = PL_diehook;
2030 PL_diehook = 0;
2031 SvREFCNT_dec (old);
2032 croak ("\3async_pool terminate\2\n");
2033 }
2034
2035 SvREFCNT_dec (coro->saved_deffh);
2036 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2037
2038 hv_store (hv, "desc", sizeof ("desc") - 1,
2039 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2040
2041 invoke_av = (AV *)SvRV (invoke);
2042 len = av_len (invoke_av);
2043
2044 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2045
2046 if (len > 0)
2047 {
2048 av_fill (defav, len - 1);
2049 for (i = 0; i < len; ++i)
2050 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2051 }
2052
2053 SvREFCNT_dec (invoke);
2054}
2055
2056void
2057_pool_2 (SV *cb)
2058 CODE:
2059{
2060 struct coro *coro = SvSTATE (coro_current);
2061
2062 sv_setsv (cb, &PL_sv_undef);
2063
2064 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2065 coro->saved_deffh = 0;
2066
2067 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2068 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2069 {
2070 SV *old = PL_diehook;
2071 PL_diehook = 0;
2072 SvREFCNT_dec (old);
2073 croak ("\3async_pool terminate\2\n");
2074 }
2075
2076 av_clear (GvAV (PL_defgv));
2077 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2078 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2079
2080 coro->prio = 0;
2081
2082 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2083 api_trace (coro_current, 0);
2084
2085 av_push (av_async_pool, newSVsv (coro_current));
2086}
2087
2088
1241MODULE = Coro::State PACKAGE = Coro::AIO 2089MODULE = Coro::State PACKAGE = Coro::AIO
1242 2090
1243SV * 2091SV *
1244_get_state () 2092_get_state ()
1245 CODE: 2093 CODE:
1246{ 2094{
1247 struct { 2095 struct io_state *data;
1248 int errorno;
1249 int laststype;
1250 int laststatval;
1251 Stat_t statcache;
1252 } data;
1253 2096
2097 RETVAL = newSV (sizeof (struct io_state));
2098 data = (struct io_state *)SvPVX (RETVAL);
2099 SvCUR_set (RETVAL, sizeof (struct io_state));
2100 SvPOK_only (RETVAL);
2101
1254 data.errorno = errno; 2102 data->errorno = errno;
1255 data.laststype = PL_laststype; 2103 data->laststype = PL_laststype;
1256 data.laststatval = PL_laststatval; 2104 data->laststatval = PL_laststatval;
1257 data.statcache = PL_statcache; 2105 data->statcache = PL_statcache;
1258
1259 RETVAL = newSVpvn ((char *)&data, sizeof data);
1260} 2106}
1261 OUTPUT: 2107 OUTPUT:
1262 RETVAL 2108 RETVAL
1263 2109
1264void 2110void
1265_set_state (char *data_) 2111_set_state (char *data_)
1266 PROTOTYPE: $ 2112 PROTOTYPE: $
1267 CODE: 2113 CODE:
1268{ 2114{
1269 struct { 2115 struct io_state *data = (void *)data_;
1270 int errorno;
1271 int laststype;
1272 int laststatval;
1273 Stat_t statcache;
1274 } *data = (void *)data_;
1275 2116
1276 errno = data->errorno; 2117 errno = data->errorno;
1277 PL_laststype = data->laststype; 2118 PL_laststype = data->laststype;
1278 PL_laststatval = data->laststatval; 2119 PL_laststatval = data->laststatval;
1279 PL_statcache = data->statcache; 2120 PL_statcache = data->statcache;
1280} 2121}
2122
2123
2124MODULE = Coro::State PACKAGE = Coro::AnyEvent
2125
2126BOOT:
2127 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2128
2129SV *
2130_schedule (...)
2131 PROTOTYPE: @
2132 CODE:
2133{
2134 static int incede;
2135
2136 api_cede_notself ();
2137
2138 ++incede;
2139 while (coro_nready >= incede && api_cede ())
2140 ;
2141
2142 sv_setsv (sv_activity, &PL_sv_undef);
2143 if (coro_nready >= incede)
2144 {
2145 PUSHMARK (SP);
2146 PUTBACK;
2147 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2148 SPAGAIN;
2149 }
2150
2151 --incede;
2152}
2153

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