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Comparing Coro/Coro/State.xs (file contents):
Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC vs.
Revision 1.239 by root, Sat Jun 28 23:14:19 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"
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
48#if CORO_USE_VALGRIND
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)
53#endif
54
55/* the maximum number of idle cctx that will be pooled */
56#define MAX_IDLE_CCTX 8
8 57
9#define PERL_VERSION_ATLEAST(a,b,c) \ 58#define PERL_VERSION_ATLEAST(a,b,c) \
10 (PERL_REVISION > (a) \ 59 (PERL_REVISION > (a) \
11 || (PERL_REVISION == (a) \ 60 || (PERL_REVISION == (a) \
12 && (PERL_VERSION > (b) \ 61 && (PERL_VERSION > (b) \
13 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c))))) 62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
14 63
15#if !PERL_VERSION_ATLEAST (5,8,0) 64#if !PERL_VERSION_ATLEAST (5,6,0)
16# ifndef PL_ppaddr 65# ifndef PL_ppaddr
17# define PL_ppaddr ppaddr 66# define PL_ppaddr ppaddr
18# endif 67# endif
19# ifndef call_sv 68# ifndef call_sv
20# define call_sv perl_call_sv 69# define call_sv perl_call_sv
… …
31# ifndef IS_PADCONST 80# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0 81# define IS_PADCONST(v) 0
33# endif 82# endif
34#endif 83#endif
35 84
36#include <stdio.h> 85/* 5.8.8 */
37#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
38 102
39#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 103#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40# undef STACKGUARD 104# undef CORO_STACKGUARD
41#endif
42
43#ifndef STACKGUARD
44# define STACKGUARD 0
45#endif
46
47#ifdef HAVE_MMAP
48# include <unistd.h>
49# include <sys/mman.h>
50# ifndef MAP_ANONYMOUS
51# ifdef MAP_ANON
52# define MAP_ANONYMOUS MAP_ANON
53# else
54# undef HAVE_MMAP
55# endif
56# endif 105#endif
57# include <limits.h> 106
58# ifndef PAGESIZE 107#ifndef CORO_STACKGUARD
59# define PAGESIZE pagesize 108# define CORO_STACKGUARD 0
60# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61static long pagesize;
62# else
63# define BOOT_PAGESIZE
64# endif 109#endif
65#endif
66 110
67/* The next macro should declare a variable stacklevel that contains and approximation 111/* prefer perl internal functions over our own? */
68 * to the current C stack pointer. Its property is that it changes with each call 112#ifndef CORO_PREFER_PERL_FUNCTIONS
69 * 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. */
70#define dSTACKLEVEL int stacklevel 118#define dSTACKLEVEL volatile char stacklevel
71#define STACKLEVEL ((void *)&stacklevel) 119#define STACKLEVEL ((void *)&stacklevel)
72 120
73#define IN_DESTRUCT (PL_main_cv == Nullcv) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
74 122
75#if __GNUC__ >= 3 123#if __GNUC__ >= 3
76# 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))
77#else 127#else
78# define attribute(x) 128# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr)
79#endif 131#endif
132
133#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1)
80 135
81#define NOINLINE attribute ((noinline)) 136#define NOINLINE attribute ((noinline))
82 137
83#include "CoroAPI.h" 138#include "CoroAPI.h"
84
85#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86 139
87#ifdef USE_ITHREADS 140#ifdef USE_ITHREADS
88static perl_mutex coro_mutex; 141static perl_mutex coro_mutex;
89# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91#else 144#else
92# define LOCK (void)0 145# define LOCK (void)0
93# define UNLOCK (void)0 146# define UNLOCK (void)0
94#endif 147#endif
95 148
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;
96static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
97static 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;
98static HV *coro_state_stash, *coro_stash; 162static HV *coro_state_stash, *coro_stash;
99static 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};
100 190
101/* this is a structure representing a c-level coroutine */ 191/* this is a structure representing a c-level coroutine */
102typedef struct coro_stack { 192typedef struct coro_cctx {
103 struct coro_stack *next; 193 struct coro_cctx *next;
104 194
105 /* the stack */ 195 /* the stack */
106 void *sptr; 196 void *sptr;
107 long ssize; /* positive == mmap, otherwise malloc */ 197 size_t ssize;
108 198
109 /* cpu state */ 199 /* cpu state */
110 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 */
111 JMPENV *top_env; 202 JMPENV *top_env;
112 coro_context cctx; 203 coro_context cctx;
113} coro_stack; 204
205#if CORO_USE_VALGRIND
206 int valgrind_id;
207#endif
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))
114 230
115/* this is a structure representing a perl-level coroutine */ 231/* this is a structure representing a perl-level coroutine */
116struct coro { 232struct coro {
117 /* the c coroutine allocated to this perl coroutine, if any */ 233 /* the c coroutine allocated to this perl coroutine, if any */
118 coro_stack *stack; 234 coro_cctx *cctx;
119 235
120 /* data associated with this coroutine (initial args) */ 236 /* process data */
121 AV *args;
122 int refcnt;
123
124 /* optionally saved, might be zero */
125 AV *defav;
126 SV *defsv;
127 SV *errsv;
128
129 /* saved global state not related to stacks */
130 U8 dowarn;
131 I32 in_eval;
132
133 /* the stacks and related info (callchain etc..) */
134 PERL_SI *curstackinfo;
135 AV *curstack;
136 AV *mainstack; 237 AV *mainstack;
137 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
138 OP *op; 239
139 SV **curpad; 240 AV *args; /* data associated with this coroutine (initial args) */
140 AV *comppad; 241 int refcnt; /* coroutines are refcounted, yes */
141 CV *compcv; 242 int flags; /* CF_ flags */
142 SV **stack_base; 243 HV *hv; /* the perl hash associated with this coro, if any */
143 SV **stack_max; 244
144 SV **tmps_stack; 245 /* statistics */
145 I32 tmps_floor; 246 int usecount; /* number of transfers to this coro */
146 I32 tmps_ix;
147 I32 tmps_max;
148 I32 *markstack;
149 I32 *markstack_ptr;
150 I32 *markstack_max;
151 I32 *scopestack;
152 I32 scopestack_ix;
153 I32 scopestack_max;
154 ANY *savestack;
155 I32 savestack_ix;
156 I32 savestack_max;
157 OP **retstack;
158 I32 retstack_ix;
159 I32 retstack_max;
160 PMOP *curpm;
161 COP *curcop;
162 247
163 /* coro process data */ 248 /* coro process data */
164 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;
165}; 257};
166 258
167typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
168typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
169 261
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
170static 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 *
171coro_clone_padlist (CV *cv) 311coro_clone_padlist (pTHX_ CV *cv)
172{ 312{
173 AV *padlist = CvPADLIST (cv); 313 AV *padlist = CvPADLIST (cv);
174 AV *newpadlist, *newpad; 314 AV *newpadlist, *newpad;
175 315
176 newpadlist = newAV (); 316 newpadlist = newAV ();
177 AvREAL_off (newpadlist); 317 AvREAL_off (newpadlist);
178#if PERL_VERSION_ATLEAST (5,9,0) 318#if PERL_VERSION_ATLEAST (5,10,0)
179 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
180#else 320#else
181 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
182#endif 322#endif
183 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
… …
188 328
189 return newpadlist; 329 return newpadlist;
190} 330}
191 331
192static void 332static void
193free_padlist (AV *padlist) 333free_padlist (pTHX_ AV *padlist)
194{ 334{
195 /* may be during global destruction */ 335 /* may be during global destruction */
196 if (SvREFCNT (padlist)) 336 if (SvREFCNT (padlist))
197 { 337 {
198 I32 i = AvFILLp (padlist); 338 I32 i = AvFILLp (padlist);
… …
219 AV *padlist; 359 AV *padlist;
220 AV *av = (AV *)mg->mg_obj; 360 AV *av = (AV *)mg->mg_obj;
221 361
222 /* casting is fun. */ 362 /* casting is fun. */
223 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224 free_padlist (padlist); 364 free_padlist (aTHX_ padlist);
225
226 SvREFCNT_dec (av);
227 365
228 return 0; 366 return 0;
229} 367}
230 368
231#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
232 371
233static 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))
234 412
235/* the next two functions merely cache the padlists */ 413/* the next two functions merely cache the padlists */
236static void 414static void
237get_padlist (CV *cv) 415get_padlist (pTHX_ CV *cv)
238{ 416{
239 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 417 MAGIC *mg = CORO_MAGIC_cv (cv);
418 AV *av;
240 419
241 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243 else 422 else
244 { 423 {
245#if 0 424#if CORO_PREFER_PERL_FUNCTIONS
246 /* this is probably cleaner, but also slower? */ 425 /* this is probably cleaner, but also slower? */
247 CV *cp = Perl_cv_clone (cv); 426 CV *cp = Perl_cv_clone (cv);
248 CvPADLIST (cv) = CvPADLIST (cp); 427 CvPADLIST (cv) = CvPADLIST (cp);
249 CvPADLIST (cp) = 0; 428 CvPADLIST (cp) = 0;
250 SvREFCNT_dec (cp); 429 SvREFCNT_dec (cp);
251#else 430#else
252 CvPADLIST (cv) = coro_clone_padlist (cv); 431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253#endif 432#endif
254 } 433 }
255} 434}
256 435
257static void 436static void
258put_padlist (CV *cv) 437put_padlist (pTHX_ CV *cv)
259{ 438{
260 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 439 MAGIC *mg = CORO_MAGIC_cv (cv);
440 AV *av;
261 441
262 if (!mg) 442 if (expect_false (!mg))
263 { 443 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
264 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266 mg->mg_virtual = &vtbl_coro;
267 mg->mg_obj = (SV *)newAV ();
268 }
269 444
270 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 445 av = (AV *)mg->mg_obj;
271}
272 446
273#define SB do { 447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
274#define SE } while (0) 448 av_extend (av, AvMAX (av) + 1);
275 449
276#define LOAD(state) load_state((state)); 450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277#define SAVE(state,flags) save_state((state),(flags)); 451}
278 452
279#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 453/** load & save, init *******************************************************/
280 454
281static void 455static void
282load_state(Coro__State c) 456load_perl (pTHX_ Coro__State c)
283{ 457{
284 PL_dowarn = c->dowarn; 458 perl_slots *slot = c->slot;
285 PL_in_eval = c->in_eval; 459 c->slot = 0;
286 460
287 PL_curstackinfo = c->curstackinfo;
288 PL_curstack = c->curstack;
289 PL_mainstack = c->mainstack; 461 PL_mainstack = c->mainstack;
290 PL_stack_sp = c->stack_sp;
291 PL_op = c->op;
292 PL_curpad = c->curpad;
293 PL_comppad = c->comppad;
294 PL_compcv = c->compcv;
295 PL_stack_base = c->stack_base;
296 PL_stack_max = c->stack_max;
297 PL_tmps_stack = c->tmps_stack;
298 PL_tmps_floor = c->tmps_floor;
299 PL_tmps_ix = c->tmps_ix;
300 PL_tmps_max = c->tmps_max;
301 PL_markstack = c->markstack;
302 PL_markstack_ptr = c->markstack_ptr;
303 PL_markstack_max = c->markstack_max;
304 PL_scopestack = c->scopestack;
305 PL_scopestack_ix = c->scopestack_ix;
306 PL_scopestack_max = c->scopestack_max;
307 PL_savestack = c->savestack;
308 PL_savestack_ix = c->savestack_ix;
309 PL_savestack_max = c->savestack_max;
310#if !PERL_VERSION_ATLEAST (5,9,0)
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314#endif
315 PL_curpm = c->curpm;
316 PL_curcop = c->curcop;
317 462
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 463 GvSV (PL_defgv) = slot->defsv;
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 464 GvAV (PL_defgv) = slot->defav;
320 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
321 471
322 { 472 {
323 dSP; 473 dSP;
474
324 CV *cv; 475 CV *cv;
325 476
326 /* now do the ugly restore mess */ 477 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 478 while (expect_true (cv = (CV *)POPs))
328 { 479 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 480 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 481 CvDEPTH (cv) = PTR2IV (POPs);
335 } 482 CvPADLIST (cv) = (AV *)POPs;
336
337 ++CvDEPTH(cv);
338 } 483 }
339 484
340 PUTBACK; 485 PUTBACK;
341 } 486 }
342} 487}
343 488
344static void 489static void
345save_state(Coro__State c, int flags) 490save_perl (pTHX_ Coro__State c)
346{ 491{
347 { 492 {
348 dSP; 493 dSP;
349 I32 cxix = cxstack_ix; 494 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 495 PERL_CONTEXT *ccstk = cxstack;
… …
353 /* 498 /*
354 * 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
355 * (and reinitialize) all cv's in the whole callchain :( 500 * (and reinitialize) all cv's in the whole callchain :(
356 */ 501 */
357 502
358 PUSHs (Nullsv); 503 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 504 /* this loop was inspired by pp_caller */
360 for (;;) 505 for (;;)
361 { 506 {
362 while (cxix >= 0) 507 while (expect_true (cxix >= 0))
363 { 508 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 509 PERL_CONTEXT *cx = &ccstk[cxix--];
365 510
366 if (CxTYPE(cx) == CXt_SUB) 511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
367 { 512 {
368 CV *cv = cx->blk_sub.cv; 513 CV *cv = cx->blk_sub.cv;
514
369 if (CvDEPTH(cv)) 515 if (expect_true (CvDEPTH (cv)))
370 { 516 {
371 EXTEND (SP, CvDEPTH(cv)*2); 517 EXTEND (SP, 3);
372
373 while (--CvDEPTH(cv))
374 {
375 /* this tells the restore code to increment CvDEPTH */
376 PUSHs (Nullsv);
377 PUSHs ((SV *)cv);
378 }
379
380 PUSHs ((SV *)CvPADLIST(cv)); 518 PUSHs ((SV *)CvPADLIST (cv));
519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381 PUSHs ((SV *)cv); 520 PUSHs ((SV *)cv);
382 521
522 CvDEPTH (cv) = 0;
383 get_padlist (cv); 523 get_padlist (aTHX_ cv);
384 } 524 }
385 } 525 }
386#ifdef CXt_FORMAT
387 else if (CxTYPE(cx) == CXt_FORMAT)
388 {
389 /* I never used formats, so how should I know how these are implemented? */
390 /* my bold guess is as a simple, plain sub... */
391 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392 }
393#endif
394 } 526 }
395 527
396 if (top_si->si_type == PERLSI_MAIN) 528 if (expect_true (top_si->si_type == PERLSI_MAIN))
397 break; 529 break;
398 530
399 top_si = top_si->si_prev; 531 top_si = top_si->si_prev;
400 ccstk = top_si->si_cxstack; 532 ccstk = top_si->si_cxstack;
401 cxix = top_si->si_cxix; 533 cxix = top_si->si_cxix;
402 } 534 }
403 535
404 PUTBACK; 536 PUTBACK;
405 } 537 }
406 538
407 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 539 /* allocate some space on the context stack for our purposes */
408 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 540 /* we manually unroll here, as usually 2 slots is enough */
409 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 */
410 550
411 c->dowarn = PL_dowarn;
412 c->in_eval = PL_in_eval;
413
414 c->curstackinfo = PL_curstackinfo;
415 c->curstack = PL_curstack;
416 c->mainstack = PL_mainstack; 551 c->mainstack = PL_mainstack;
417 c->stack_sp = PL_stack_sp; 552
418 c->op = PL_op; 553 {
419 c->curpad = PL_curpad; 554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420 c->comppad = PL_comppad; 555
421 c->compcv = PL_compcv; 556 slot->defav = GvAV (PL_defgv);
422 c->stack_base = PL_stack_base; 557 slot->defsv = DEFSV;
423 c->stack_max = PL_stack_max; 558 slot->errsv = ERRSV;
424 c->tmps_stack = PL_tmps_stack; 559 slot->irsgv = GvSV (irsgv);
425 c->tmps_floor = PL_tmps_floor; 560
426 c->tmps_ix = PL_tmps_ix; 561 #define VAR(name,type) slot->name = PL_ ## name;
427 c->tmps_max = PL_tmps_max; 562 # include "state.h"
428 c->markstack = PL_markstack; 563 #undef VAR
429 c->markstack_ptr = PL_markstack_ptr; 564 }
430 c->markstack_max = PL_markstack_max;
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437#if !PERL_VERSION_ATLEAST (5,9,0)
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441#endif
442 c->curpm = PL_curpm;
443 c->curcop = PL_curcop;
444} 565}
445 566
446/* 567/*
447 * allocate various perl stacks. This is an exact copy 568 * allocate various perl stacks. This is an exact copy
448 * of perl.c:init_stacks, except that it uses less memory 569 * of perl.c:init_stacks, except that it uses less memory
449 * on the (sometimes correct) assumption that coroutines do 570 * on the (sometimes correct) assumption that coroutines do
450 * not usually need a lot of stackspace. 571 * not usually need a lot of stackspace.
451 */ 572 */
573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
452static void 576static void
453coro_init_stacks () 577coro_init_stacks (pTHX)
454{ 578{
455 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 579 PL_curstackinfo = new_stackinfo(32, 8);
456 PL_curstackinfo->si_type = PERLSI_MAIN; 580 PL_curstackinfo->si_type = PERLSI_MAIN;
457 PL_curstack = PL_curstackinfo->si_stack; 581 PL_curstack = PL_curstackinfo->si_stack;
458 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459 583
460 PL_stack_base = AvARRAY(PL_curstack); 584 PL_stack_base = AvARRAY(PL_curstack);
461 PL_stack_sp = PL_stack_base; 585 PL_stack_sp = PL_stack_base;
462 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463 587
464 New(50,PL_tmps_stack,96,SV*); 588 New(50,PL_tmps_stack,32,SV*);
465 PL_tmps_floor = -1; 589 PL_tmps_floor = -1;
466 PL_tmps_ix = -1; 590 PL_tmps_ix = -1;
467 PL_tmps_max = 96; 591 PL_tmps_max = 32;
468 592
469 New(54,PL_markstack,16,I32); 593 New(54,PL_markstack,16,I32);
470 PL_markstack_ptr = PL_markstack; 594 PL_markstack_ptr = PL_markstack;
471 PL_markstack_max = PL_markstack + 16; 595 PL_markstack_max = PL_markstack + 16;
472 596
473#ifdef SET_MARK_OFFSET 597#ifdef SET_MARK_OFFSET
474 SET_MARK_OFFSET; 598 SET_MARK_OFFSET;
475#endif 599#endif
476 600
477 New(54,PL_scopestack,16,I32); 601 New(54,PL_scopestack,8,I32);
478 PL_scopestack_ix = 0; 602 PL_scopestack_ix = 0;
479 PL_scopestack_max = 16; 603 PL_scopestack_max = 8;
480 604
481 New(54,PL_savestack,96,ANY); 605 New(54,PL_savestack,24,ANY);
482 PL_savestack_ix = 0; 606 PL_savestack_ix = 0;
483 PL_savestack_max = 96; 607 PL_savestack_max = 24;
484 608
485#if !PERL_VERSION_ATLEAST (5,9,0) 609#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 610 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 611 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 612 PL_retstack_max = 4;
489#endif 613#endif
490} 614}
615#endif
491 616
492/* 617/*
493 * destroy the stacks, the callchain etc... 618 * destroy the stacks, the callchain etc...
494 */ 619 */
495static void 620static void
496destroy_stacks() 621coro_destroy_stacks (pTHX)
497{ 622{
498 if (!IN_DESTRUCT)
499 {
500 /* is this ugly, I ask? */
501 LEAVE_SCOPE (0);
502
503 /* sure it is, but more important: is it correct?? :/ */
504 FREETMPS;
505
506 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507 }
508
509 while (PL_curstackinfo->si_next) 623 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 624 PL_curstackinfo = PL_curstackinfo->si_next;
511 625
512 while (PL_curstackinfo) 626 while (PL_curstackinfo)
513 { 627 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 628 PERL_SI *p = PL_curstackinfo->si_prev;
515 629
516 { /*D*//*remove*/
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 630 if (!IN_DESTRUCT)
523 {
524 dounwind (-1);/*D*//*remove*/
525 SvREFCNT_dec (PL_curstackinfo->si_stack); 631 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 632
528 Safefree (PL_curstackinfo->si_cxstack); 633 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree (PL_curstackinfo); 634 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 635 PL_curstackinfo = p;
531 } 636 }
532 637
533 Safefree (PL_tmps_stack); 638 Safefree (PL_tmps_stack);
534 Safefree (PL_markstack); 639 Safefree (PL_markstack);
535 Safefree (PL_scopestack); 640 Safefree (PL_scopestack);
536 Safefree (PL_savestack); 641 Safefree (PL_savestack);
537#if !PERL_VERSION_ATLEAST (5,9,0) 642#if !PERL_VERSION_ATLEAST (5,10,0)
538 Safefree (PL_retstack); 643 Safefree (PL_retstack);
539#endif 644#endif
540} 645}
541 646
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#undef MgPV_nolen_const
692#ifndef MgPV_nolen_const
693#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
694 SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \
695 (const char*)(mg)->mg_ptr)
696#endif
697
698/*
699 * This overrides the default magic get method of %SIG elements.
700 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
701 * and instead of tryign to save and restore the hash elements, we just provide
702 * readback here.
703 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
704 * not expecting this to actually change the hook. This is a potential problem
705 * when a schedule happens then, but we ignore this.
706 */
707static int
708coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
709{
710 const char *s = MgPV_nolen_const (mg);
711
712 if (*s == '_')
713 {
714 SV **svp = 0;
715
716 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
717 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
718
719 if (svp)
720 {
721 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
722 return 0;
723 }
724 }
725
726 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
727}
728
729static int
730coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
731{
732 const char *s = MgPV_nolen_const (mg);
733
734 if (*s == '_')
735 {
736 SV **svp = 0;
737
738 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
739 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
740
741 if (svp)
742 {
743 SV *old = *svp;
744 *svp = 0;
745 SvREFCNT_dec (old);
746 return 0;
747 }
748 }
749
750 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
751}
752
753static int
754coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
755{
756 const char *s = MgPV_nolen_const (mg);
757
758 if (*s == '_')
759 {
760 SV **svp = 0;
761
762 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
763 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
764
765 if (svp)
766 {
767 SV *old = *svp;
768 *svp = newSVsv (sv);
769 SvREFCNT_dec (old);
770 return 0;
771 }
772 }
773
774 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
775}
776
542static void 777static void
543setup_coro (struct coro *coro) 778coro_setup (pTHX_ struct coro *coro)
544{ 779{
545 /* 780 /*
546 * emulate part of the perl startup here. 781 * emulate part of the perl startup here.
547 */ 782 */
548 dTHX; 783 coro_init_stacks (aTHX);
784
785 PL_runops = RUNOPS_DEFAULT;
786 PL_curcop = &PL_compiling;
787 PL_in_eval = EVAL_NULL;
788 PL_comppad = 0;
789 PL_curpm = 0;
790 PL_curpad = 0;
791 PL_localizing = 0;
792 PL_dirty = 0;
793 PL_restartop = 0;
794#if PERL_VERSION_ATLEAST (5,10,0)
795 PL_parser = 0;
796#endif
797
798 /* recreate the die/warn hooks */
799 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
800 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
801
802 GvSV (PL_defgv) = newSV (0);
803 GvAV (PL_defgv) = coro->args; coro->args = 0;
804 GvSV (PL_errgv) = newSV (0);
805 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
806 PL_rs = newSVsv (GvSV (irsgv));
807 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
808
809 {
810 dSP;
811 LOGOP myop;
812
813 Zero (&myop, 1, LOGOP);
814 myop.op_next = Nullop;
815 myop.op_flags = OPf_WANT_VOID;
816
817 PUSHMARK (SP);
818 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
819 PUTBACK;
820 PL_op = (OP *)&myop;
821 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
822 SPAGAIN;
823 }
824
825 /* this newly created coroutine might be run on an existing cctx which most
826 * likely was suspended in set_stacklevel, called from entersub.
827 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
828 * so we ENTER here for symmetry
829 */
830 ENTER;
831}
832
833static void
834coro_destroy (pTHX_ struct coro *coro)
835{
836 if (!IN_DESTRUCT)
837 {
838 /* restore all saved variables and stuff */
839 LEAVE_SCOPE (0);
840 assert (PL_tmps_floor == -1);
841
842 /* free all temporaries */
843 FREETMPS;
844 assert (PL_tmps_ix == -1);
845
846 /* unwind all extra stacks */
847 POPSTACK_TO (PL_mainstack);
848
849 /* unwind main stack */
850 dounwind (-1);
851 }
852
853 SvREFCNT_dec (GvSV (PL_defgv));
854 SvREFCNT_dec (GvAV (PL_defgv));
855 SvREFCNT_dec (GvSV (PL_errgv));
856 SvREFCNT_dec (PL_defoutgv);
857 SvREFCNT_dec (PL_rs);
858 SvREFCNT_dec (GvSV (irsgv));
859
860 SvREFCNT_dec (PL_diehook);
861 SvREFCNT_dec (PL_warnhook);
862
863 SvREFCNT_dec (coro->saved_deffh);
864 SvREFCNT_dec (coro->throw);
865
866 coro_destroy_stacks (aTHX);
867}
868
869static void
870free_coro_mortal (pTHX)
871{
872 if (expect_true (coro_mortal))
873 {
874 SvREFCNT_dec (coro_mortal);
875 coro_mortal = 0;
876 }
877}
878
879static int
880runops_trace (pTHX)
881{
882 COP *oldcop = 0;
883 int oldcxix = -2;
884 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
885 coro_cctx *cctx = coro->cctx;
886
887 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
888 {
889 PERL_ASYNC_CHECK ();
890
891 if (cctx->flags & CC_TRACE_ALL)
892 {
893 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
894 {
895 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
896 SV **bot, **top;
897 AV *av = newAV (); /* return values */
898 SV **cb;
899 dSP;
900
901 GV *gv = CvGV (cx->blk_sub.cv);
902 SV *fullname = sv_2mortal (newSV (0));
903 if (isGV (gv))
904 gv_efullname3 (fullname, gv, 0);
905
906 bot = PL_stack_base + cx->blk_oldsp + 1;
907 top = cx->blk_gimme == G_ARRAY ? SP + 1
908 : cx->blk_gimme == G_SCALAR ? bot + 1
909 : bot;
910
911 av_extend (av, top - bot);
912 while (bot < top)
913 av_push (av, SvREFCNT_inc (*bot++));
914
915 PL_runops = RUNOPS_DEFAULT;
916 ENTER;
917 SAVETMPS;
918 EXTEND (SP, 3);
919 PUSHMARK (SP);
920 PUSHs (&PL_sv_no);
921 PUSHs (fullname);
922 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
923 PUTBACK;
924 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
925 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
926 SPAGAIN;
927 FREETMPS;
928 LEAVE;
929 PL_runops = runops_trace;
930 }
931
932 if (oldcop != PL_curcop)
933 {
934 oldcop = PL_curcop;
935
936 if (PL_curcop != &PL_compiling)
937 {
938 SV **cb;
939
940 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
941 {
942 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
943
944 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
945 {
946 runops_proc_t old_runops = PL_runops;
947 dSP;
948 GV *gv = CvGV (cx->blk_sub.cv);
949 SV *fullname = sv_2mortal (newSV (0));
950
951 if (isGV (gv))
952 gv_efullname3 (fullname, gv, 0);
953
954 PL_runops = RUNOPS_DEFAULT;
955 ENTER;
956 SAVETMPS;
957 EXTEND (SP, 3);
958 PUSHMARK (SP);
959 PUSHs (&PL_sv_yes);
960 PUSHs (fullname);
961 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
962 PUTBACK;
963 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
964 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
965 SPAGAIN;
966 FREETMPS;
967 LEAVE;
968 PL_runops = runops_trace;
969 }
970
971 oldcxix = cxstack_ix;
972 }
973
974 if (cctx->flags & CC_TRACE_LINE)
975 {
976 dSP;
977
978 PL_runops = RUNOPS_DEFAULT;
979 ENTER;
980 SAVETMPS;
981 EXTEND (SP, 3);
982 PL_runops = RUNOPS_DEFAULT;
983 PUSHMARK (SP);
984 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
985 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
986 PUTBACK;
987 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
988 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
989 SPAGAIN;
990 FREETMPS;
991 LEAVE;
992 PL_runops = runops_trace;
993 }
994 }
995 }
996 }
997 }
998
999 TAINT_NOT;
1000 return 0;
1001}
1002
1003/* inject a fake call to Coro::State::_cctx_init into the execution */
1004/* _cctx_init should be careful, as it could be called at almost any time */
1005/* during execution of a perl program */
1006static void NOINLINE
1007cctx_prepare (pTHX_ coro_cctx *cctx)
1008{
549 dSP; 1009 dSP;
550 UNOP myop; 1010 LOGOP myop;
551 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
552 1011
553 coro_init_stacks (); 1012 PL_top_env = &PL_start_env;
554 /*PL_curcop = 0;*/
555 /*PL_in_eval = PL_in_eval;*/ /* inherit */
556 SvREFCNT_dec (GvAV (PL_defgv));
557 GvAV (PL_defgv) = coro->args; coro->args = 0;
558 1013
559 SPAGAIN; 1014 if (cctx->flags & CC_TRACE)
1015 PL_runops = runops_trace;
560 1016
561 Zero (&myop, 1, UNOP); 1017 Zero (&myop, 1, LOGOP);
562 myop.op_next = Nullop; 1018 myop.op_next = PL_op;
563 myop.op_flags = OPf_WANT_VOID; 1019 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
564 1020
1021 PUSHMARK (SP);
1022 EXTEND (SP, 2);
1023 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1024 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1025 PUTBACK;
565 PL_op = (OP *)&myop; 1026 PL_op = (OP *)&myop;
566
567 PUSHMARK(SP);
568 XPUSHs (sub_init);
569 PUTBACK;
570 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 1027 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
571 SPAGAIN; 1028 SPAGAIN;
572
573 ENTER; /* necessary e.g. for dounwind */
574} 1029}
575 1030
1031/*
1032 * this is a _very_ stripped down perl interpreter ;)
1033 */
576static void 1034static void
577free_coro_mortal () 1035cctx_run (void *arg)
578{ 1036{
579 if (coro_mortal) 1037 dTHX;
580 { 1038
581 SvREFCNT_dec (coro_mortal); 1039 /* cctx_run is the alternative tail of transfer(), so unlock here. */
582 coro_mortal = 0; 1040 UNLOCK;
1041
1042 /* we now skip the entersub that lead to transfer() */
1043 PL_op = PL_op->op_next;
1044
1045 /* inject a fake subroutine call to cctx_init */
1046 cctx_prepare (aTHX_ (coro_cctx *)arg);
1047
1048 /* somebody or something will hit me for both perl_run and PL_restartop */
1049 PL_restartop = PL_op;
1050 perl_run (PL_curinterp);
1051
1052 /*
1053 * If perl-run returns we assume exit() was being called or the coro
1054 * fell off the end, which seems to be the only valid (non-bug)
1055 * reason for perl_run to return. We try to exit by jumping to the
1056 * bootstrap-time "top" top_env, as we cannot restore the "main"
1057 * coroutine as Coro has no such concept
1058 */
1059 PL_top_env = main_top_env;
1060 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1061}
1062
1063static coro_cctx *
1064cctx_new ()
1065{
1066 coro_cctx *cctx;
1067 void *stack_start;
1068 size_t stack_size;
1069
1070 ++cctx_count;
1071
1072 Newz (0, cctx, 1, coro_cctx);
1073
1074#if HAVE_MMAP
1075 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1076 /* mmap supposedly does allocate-on-write for us */
1077 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1078
1079 if (cctx->sptr != (void *)-1)
583 } 1080 {
584} 1081# if CORO_STACKGUARD
1082 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1083# endif
1084 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1085 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1086 cctx->flags |= CC_MAPPED;
1087 }
1088 else
1089#endif
1090 {
1091 cctx->ssize = coro_stacksize * (long)sizeof (long);
1092 New (0, cctx->sptr, coro_stacksize, long);
585 1093
1094 if (!cctx->sptr)
1095 {
1096 perror ("FATAL: unable to allocate stack for coroutine");
1097 _exit (EXIT_FAILURE);
1098 }
1099
1100 stack_start = cctx->sptr;
1101 stack_size = cctx->ssize;
1102 }
1103
1104 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1105 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1106
1107 return cctx;
1108}
1109
1110static void
1111cctx_destroy (coro_cctx *cctx)
1112{
1113 if (!cctx)
1114 return;
1115
1116 --cctx_count;
1117
1118#if CORO_USE_VALGRIND
1119 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1120#endif
1121
1122#if HAVE_MMAP
1123 if (cctx->flags & CC_MAPPED)
1124 munmap (cctx->sptr, cctx->ssize);
1125 else
1126#endif
1127 Safefree (cctx->sptr);
1128
1129 Safefree (cctx);
1130}
1131
1132/* wether this cctx should be destructed */
1133#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1134
1135static coro_cctx *
1136cctx_get (pTHX)
1137{
1138 while (expect_true (cctx_first))
1139 {
1140 coro_cctx *cctx = cctx_first;
1141 cctx_first = cctx->next;
1142 --cctx_idle;
1143
1144 if (expect_true (!CCTX_EXPIRED (cctx)))
1145 return cctx;
1146
1147 cctx_destroy (cctx);
1148 }
1149
1150 return cctx_new ();
1151}
1152
1153static void
1154cctx_put (coro_cctx *cctx)
1155{
1156 /* free another cctx if overlimit */
1157 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1158 {
1159 coro_cctx *first = cctx_first;
1160 cctx_first = first->next;
1161 --cctx_idle;
1162
1163 cctx_destroy (first);
1164 }
1165
1166 ++cctx_idle;
1167 cctx->next = cctx_first;
1168 cctx_first = cctx;
1169}
1170
1171/** coroutine switching *****************************************************/
1172
1173static void
1174transfer_check (pTHX_ struct coro *prev, struct coro *next)
1175{
1176 if (expect_true (prev != next))
1177 {
1178 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1179 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1180
1181 if (expect_false (next->flags & CF_RUNNING))
1182 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1183
1184 if (expect_false (next->flags & CF_DESTROYED))
1185 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1186
1187#if !PERL_VERSION_ATLEAST (5,10,0)
1188 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1189 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1190#endif
1191 }
1192}
1193
1194/* always use the TRANSFER macro */
586static void NOINLINE 1195static void NOINLINE
587prepare_cctx (coro_stack *cctx)
588{
589 dSP;
590 UNOP myop;
591
592 Zero (&myop, 1, UNOP);
593 myop.op_next = PL_op;
594 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
595
596 PUSHMARK(SP);
597 EXTEND (SP, 2);
598 PUSHs (newSViv (PTR2IV (cctx)));
599 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
600 PUTBACK;
601 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
602 SPAGAIN;
603}
604
605static void
606coro_run (void *arg)
607{
608 /*
609 * this is a _very_ stripped down perl interpreter ;)
610 */
611 UNLOCK;
612
613 PL_top_env = &PL_start_env;
614 prepare_cctx ((coro_stack *)arg);
615
616 /* somebody will hit me for both perl_run and PL_restartop */
617 perl_run (PERL_GET_CONTEXT);
618
619 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
620 abort ();
621}
622
623static coro_stack *
624stack_new ()
625{
626 coro_stack *stack;
627
628 New (0, stack, 1, coro_stack);
629
630#if HAVE_MMAP
631
632 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
633 /* mmap suppsedly does allocate-on-write for us */
634 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
635
636 if (stack->sptr == (void *)-1)
637 {
638 perror ("FATAL: unable to mmap stack for coroutine");
639 _exit (EXIT_FAILURE);
640 }
641
642# if STACKGUARD
643 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
644# endif
645
646#else
647
648 stack->ssize = STACKSIZE * (long)sizeof (long);
649 New (0, stack->sptr, STACKSIZE, long);
650
651 if (!stack->sptr)
652 {
653 perror (stderr, "FATAL: unable to malloc stack for coroutine");
654 _exit (EXIT_FAILURE);
655 }
656
657#endif
658
659 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
660
661 return stack;
662}
663
664static void
665stack_free (coro_stack *stack)
666{
667 if (!stack)
668 return;
669
670#if HAVE_MMAP
671 munmap (stack->sptr, stack->ssize);
672#else
673 Safefree (stack->sptr);
674#endif
675
676 Safefree (stack);
677}
678
679static coro_stack *stack_first;
680
681static coro_stack *
682stack_get ()
683{
684 coro_stack *stack;
685
686 if (stack_first)
687 {
688 stack = stack_first;
689 stack_first = stack->next;
690 }
691 else
692 {
693 stack = stack_new ();
694 PL_op = PL_op->op_next;
695 }
696
697 return stack;
698}
699
700static void
701stack_put (coro_stack *stack)
702{
703 stack->next = stack_first;
704 stack_first = stack;
705}
706
707/* never call directly, always through the coro_state_transfer global variable */
708static void NOINLINE
709transfer (struct coro *prev, struct coro *next, int flags) 1196transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
710{ 1197{
711 dSTACKLEVEL; 1198 dSTACKLEVEL;
1199 static volatile int has_throw;
712 1200
713 /* sometimes transfer is only called to set idle_sp */ 1201 /* sometimes transfer is only called to set idle_sp */
714 if (flags == TRANSFER_SET_STACKLEVEL) 1202 if (expect_false (!next))
1203 {
715 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1204 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
716 else if (prev != next) 1205 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
717 { 1206 }
1207 else if (expect_true (prev != next))
1208 {
718 coro_stack *prev__stack; 1209 coro_cctx *prev__cctx;
1210
1211 if (expect_false (prev->flags & CF_NEW))
1212 {
1213 /* create a new empty context */
1214 Newz (0, prev->cctx, 1, coro_cctx);
1215 prev->flags &= ~CF_NEW;
1216 prev->flags |= CF_RUNNING;
1217 }
1218
1219 prev->flags &= ~CF_RUNNING;
1220 next->flags |= CF_RUNNING;
719 1221
720 LOCK; 1222 LOCK;
721 1223
722 if (next->mainstack) 1224 /* first get rid of the old state */
1225 save_perl (aTHX_ prev);
1226
1227 if (expect_false (next->flags & CF_NEW))
723 { 1228 {
724 /* coroutine already started */ 1229 /* need to start coroutine */
725 SAVE (prev, flags); 1230 next->flags &= ~CF_NEW;
726 LOAD (next); 1231 /* setup coroutine call */
1232 coro_setup (aTHX_ next);
727 } 1233 }
728 else 1234 else
1235 load_perl (aTHX_ next);
1236
1237 prev__cctx = prev->cctx;
1238
1239 /* possibly "free" the cctx */
1240 if (expect_true (
1241 prev__cctx->idle_sp == STACKLEVEL
1242 && !(prev__cctx->flags & CC_TRACE)
1243 && !force_cctx
1244 ))
729 { 1245 {
730 /* need to start coroutine */ 1246 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
731 /* first get rid of the old state */ 1247 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
732 SAVE (prev, -1); 1248
733 /* setup coroutine call */ 1249 prev->cctx = 0;
734 setup_coro (next); 1250
735 /* need a stack */ 1251 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
736 next->stack = 0; 1252 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1253 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1254 if (!next->cctx)
1255 next->cctx = cctx_get (aTHX);
1256
1257 cctx_put (prev__cctx);
737 } 1258 }
738 1259
739 if (!prev->stack) 1260 ++next->usecount;
740 /* create a new empty context */
741 Newz (0, prev->stack, 1, coro_stack);
742 1261
743 prev__stack = prev->stack; 1262 if (expect_true (!next->cctx))
1263 next->cctx = cctx_get (aTHX);
744 1264
745 /* possibly "free" the stack */ 1265 has_throw = !!next->throw;
746 if (prev__stack->idle_sp == STACKLEVEL) 1266
1267 if (expect_false (prev__cctx != next->cctx))
747 { 1268 {
748 stack_put (prev__stack); 1269 prev__cctx->top_env = PL_top_env;
749 prev->stack = 0; 1270 PL_top_env = next->cctx->top_env;
1271 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
750 } 1272 }
751 1273
752 if (!next->stack) 1274 free_coro_mortal (aTHX);
753 next->stack = stack_get (); 1275 UNLOCK;
754 1276
755 if (prev__stack != next->stack) 1277 if (expect_false (has_throw))
756 { 1278 {
757 prev__stack->top_env = PL_top_env; 1279 struct coro *coro = SvSTATE (coro_current);
758 PL_top_env = next->stack->top_env; 1280
759 coro_transfer (&prev__stack->cctx, &next->stack->cctx); 1281 if (coro->throw)
1282 {
1283 SV *exception = coro->throw;
1284 coro->throw = 0;
1285 sv_setsv (ERRSV, exception);
1286 croak (0);
1287 }
760 } 1288 }
1289 }
1290}
761 1291
762 free_coro_mortal (); 1292struct transfer_args
1293{
1294 struct coro *prev, *next;
1295};
763 1296
1297#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1298#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1299
1300/** high level stuff ********************************************************/
1301
1302static int
1303coro_state_destroy (pTHX_ struct coro *coro)
1304{
1305 if (coro->flags & CF_DESTROYED)
1306 return 0;
1307
1308 coro->flags |= CF_DESTROYED;
1309
1310 if (coro->flags & CF_READY)
1311 {
1312 /* reduce nready, as destroying a ready coro effectively unreadies it */
1313 /* alternative: look through all ready queues and remove the coro */
1314 LOCK;
1315 --coro_nready;
764 UNLOCK; 1316 UNLOCK;
765 } 1317 }
766} 1318 else
767 1319 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768struct transfer_args
769{
770 struct coro *prev, *next;
771 int flags;
772};
773
774#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
775
776static void
777coro_state_destroy (struct coro *coro)
778{
779 if (coro->refcnt--)
780 return;
781 1320
782 if (coro->mainstack && coro->mainstack != main_mainstack) 1321 if (coro->mainstack && coro->mainstack != main_mainstack)
783 { 1322 {
784 struct coro temp; 1323 struct coro temp;
785 1324
786 SAVE ((&temp), TRANSFER_SAVE_ALL); 1325 if (coro->flags & CF_RUNNING)
787 LOAD (coro); 1326 croak ("FATAL: tried to destroy currently running coroutine");
788 1327
789 destroy_stacks (); 1328 save_perl (aTHX_ &temp);
1329 load_perl (aTHX_ coro);
790 1330
791 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1331 coro_destroy (aTHX_ coro);
792 1332
1333 load_perl (aTHX_ &temp);
1334
793 coro->mainstack = 0; 1335 coro->slot = 0;
794 } 1336 }
795 1337
796 stack_free (coro->stack); 1338 cctx_destroy (coro->cctx);
797 SvREFCNT_dec (coro->args); 1339 SvREFCNT_dec (coro->args);
798 Safefree (coro); 1340
1341 if (coro->next) coro->next->prev = coro->prev;
1342 if (coro->prev) coro->prev->next = coro->next;
1343 if (coro == coro_first) coro_first = coro->next;
1344
1345 return 1;
799} 1346}
800 1347
801static int 1348static int
802coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1349coro_state_free (pTHX_ SV *sv, MAGIC *mg)
803{ 1350{
804 struct coro *coro = (struct coro *)mg->mg_ptr; 1351 struct coro *coro = (struct coro *)mg->mg_ptr;
805 mg->mg_ptr = 0; 1352 mg->mg_ptr = 0;
806 1353
1354 coro->hv = 0;
1355
1356 if (--coro->refcnt < 0)
1357 {
807 coro_state_destroy (coro); 1358 coro_state_destroy (aTHX_ coro);
1359 Safefree (coro);
1360 }
808 1361
809 return 0; 1362 return 0;
810} 1363}
811 1364
812static int 1365static int
… …
819 return 0; 1372 return 0;
820} 1373}
821 1374
822static MGVTBL coro_state_vtbl = { 1375static MGVTBL coro_state_vtbl = {
823 0, 0, 0, 0, 1376 0, 0, 0, 0,
824 coro_state_clear, 1377 coro_state_free,
825 0, 1378 0,
826#ifdef MGf_DUP 1379#ifdef MGf_DUP
827 coro_state_dup, 1380 coro_state_dup,
1381#else
1382# define MGf_DUP 0
828#endif 1383#endif
829}; 1384};
830 1385
831static struct coro *
832SvSTATE (SV *coro)
833{
834 HV *stash;
835 MAGIC *mg;
836
837 if (SvROK (coro))
838 coro = SvRV (coro);
839
840 stash = SvSTASH (coro);
841 if (stash != coro_stash && stash != coro_state_stash)
842 {
843 /* very slow, but rare, check */
844 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845 croak ("Coro::State object required");
846 }
847
848 mg = SvMAGIC (coro);
849 assert (mg->mg_type == PERL_MAGIC_ext);
850 return (struct coro *)mg->mg_ptr;
851}
852
853static void 1386static void
854prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1387prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
855{ 1388{
856 ta->prev = SvSTATE (prev); 1389 ta->prev = SvSTATE (prev_sv);
857 ta->next = SvSTATE (next); 1390 ta->next = SvSTATE (next_sv);
858 ta->flags = flags; 1391 TRANSFER_CHECK (*ta);
859} 1392}
860 1393
861static void 1394static void
862api_transfer (SV *prev, SV *next, int flags) 1395api_transfer (SV *prev_sv, SV *next_sv)
863{ 1396{
864 dTHX; 1397 dTHX;
865 struct transfer_args ta; 1398 struct transfer_args ta;
866 1399
867 prepare_transfer (&ta, prev, next, flags); 1400 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868 TRANSFER (ta); 1401 TRANSFER (ta, 1);
869} 1402}
870 1403
871/** Coro ********************************************************************/ 1404/** Coro ********************************************************************/
872 1405
873#define PRIO_MAX 3
874#define PRIO_HIGH 1
875#define PRIO_NORMAL 0
876#define PRIO_LOW -1
877#define PRIO_IDLE -3
878#define PRIO_MIN -4
879
880/* for Coro.pm */
881static GV *coro_current, *coro_idle;
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883static int coro_nready;
884
885static void 1406static void
886coro_enq (SV *sv) 1407coro_enq (pTHX_ SV *coro_sv)
1408{
1409 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1410}
1411
1412static SV *
1413coro_deq (pTHX)
887{ 1414{
888 int prio; 1415 int prio;
889 1416
890 if (SvTYPE (sv) != SVt_PVHV)
891 croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893 prio = SvSTATE (sv)->prio;
894
895 av_push (coro_ready [prio - PRIO_MIN], sv);
896 coro_nready++;
897}
898
899static SV *
900coro_deq (int min_prio)
901{
902 int prio = PRIO_MAX - PRIO_MIN;
903
904 min_prio -= PRIO_MIN;
905 if (min_prio < 0)
906 min_prio = 0;
907
908 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1417 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
909 if (AvFILLp (coro_ready [prio]) >= 0) 1418 if (AvFILLp (coro_ready [prio]) >= 0)
910 {
911 coro_nready--;
912 return av_shift (coro_ready [prio]); 1419 return av_shift (coro_ready [prio]);
913 }
914 1420
915 return 0; 1421 return 0;
916} 1422}
917 1423
1424static int
1425api_ready (SV *coro_sv)
1426{
1427 dTHX;
1428 struct coro *coro;
1429 SV *sv_hook;
1430 void (*xs_hook)(void);
1431
1432 if (SvROK (coro_sv))
1433 coro_sv = SvRV (coro_sv);
1434
1435 coro = SvSTATE (coro_sv);
1436
1437 if (coro->flags & CF_READY)
1438 return 0;
1439
1440 coro->flags |= CF_READY;
1441
1442 LOCK;
1443
1444 sv_hook = coro_nready ? 0 : coro_readyhook;
1445 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1446
1447 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1448 ++coro_nready;
1449
1450 UNLOCK;
1451
1452 if (sv_hook)
1453 {
1454 dSP;
1455
1456 ENTER;
1457 SAVETMPS;
1458
1459 PUSHMARK (SP);
1460 PUTBACK;
1461 call_sv (sv_hook, G_DISCARD);
1462 SPAGAIN;
1463
1464 FREETMPS;
1465 LEAVE;
1466 }
1467
1468 if (xs_hook)
1469 xs_hook ();
1470
1471 return 1;
1472}
1473
1474static int
1475api_is_ready (SV *coro_sv)
1476{
1477 dTHX;
1478 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1479}
1480
918static void 1481static void
919api_ready (SV *coro) 1482prepare_schedule (pTHX_ struct transfer_args *ta)
920{ 1483{
921 dTHX; 1484 SV *prev_sv, *next_sv;
922 1485
923 if (SvROK (coro)) 1486 for (;;)
924 coro = SvRV (coro); 1487 {
1488 LOCK;
1489 next_sv = coro_deq (aTHX);
1490
1491 /* nothing to schedule: call the idle handler */
1492 if (expect_false (!next_sv))
1493 {
1494 dSP;
1495 UNLOCK;
1496
1497 ENTER;
1498 SAVETMPS;
1499
1500 PUSHMARK (SP);
1501 PUTBACK;
1502 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1503 SPAGAIN;
1504
1505 FREETMPS;
1506 LEAVE;
1507 continue;
1508 }
1509
1510 ta->next = SvSTATE (next_sv);
1511
1512 /* cannot transfer to destroyed coros, skip and look for next */
1513 if (expect_false (ta->next->flags & CF_DESTROYED))
1514 {
1515 UNLOCK;
1516 SvREFCNT_dec (next_sv);
1517 /* coro_nready is already taken care of by destroy */
1518 continue;
1519 }
1520
1521 --coro_nready;
1522 UNLOCK;
1523 break;
1524 }
1525
1526 /* free this only after the transfer */
1527 prev_sv = SvRV (coro_current);
1528 ta->prev = SvSTATE (prev_sv);
1529 TRANSFER_CHECK (*ta);
1530 assert (ta->next->flags & CF_READY);
1531 ta->next->flags &= ~CF_READY;
1532 SvRV_set (coro_current, next_sv);
925 1533
926 LOCK; 1534 LOCK;
927 coro_enq (SvREFCNT_inc (coro)); 1535 free_coro_mortal (aTHX);
1536 coro_mortal = prev_sv;
928 UNLOCK; 1537 UNLOCK;
929} 1538}
930 1539
931static void 1540static void
932prepare_schedule (struct transfer_args *ta)
933{
934 SV *current, *prev, *next;
935
936 current = GvSV (coro_current);
937
938 for (;;)
939 {
940 LOCK;
941 next = coro_deq (PRIO_MIN);
942 UNLOCK;
943
944 if (next)
945 break;
946
947 {
948 dSP;
949
950 ENTER;
951 SAVETMPS;
952
953 PUSHMARK (SP);
954 PUTBACK;
955 call_sv (GvSV (coro_idle), G_DISCARD);
956
957 FREETMPS;
958 LEAVE;
959 }
960 }
961
962 prev = SvRV (current);
963 SvRV (current) = next;
964
965 /* free this only after the transfer */
966 LOCK;
967 free_coro_mortal ();
968 UNLOCK;
969 coro_mortal = prev;
970
971 ta->prev = SvSTATE (prev);
972 ta->next = SvSTATE (next);
973 ta->flags = TRANSFER_SAVE_ALL;
974}
975
976static void
977prepare_cede (struct transfer_args *ta) 1541prepare_cede (pTHX_ struct transfer_args *ta)
978{ 1542{
979 LOCK; 1543 api_ready (coro_current);
980 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981 UNLOCK;
982
983 prepare_schedule (ta); 1544 prepare_schedule (aTHX_ ta);
1545}
1546
1547static int
1548prepare_cede_notself (pTHX_ struct transfer_args *ta)
1549{
1550 if (coro_nready)
1551 {
1552 SV *prev = SvRV (coro_current);
1553 prepare_schedule (aTHX_ ta);
1554 api_ready (prev);
1555 return 1;
1556 }
1557 else
1558 return 0;
984} 1559}
985 1560
986static void 1561static void
987api_schedule (void) 1562api_schedule (void)
988{ 1563{
989 dTHX; 1564 dTHX;
990 struct transfer_args ta; 1565 struct transfer_args ta;
991 1566
992 prepare_schedule (&ta); 1567 prepare_schedule (aTHX_ &ta);
993 TRANSFER (ta); 1568 TRANSFER (ta, 1);
994} 1569}
995 1570
996static void 1571static int
997api_cede (void) 1572api_cede (void)
998{ 1573{
999 dTHX; 1574 dTHX;
1000 struct transfer_args ta; 1575 struct transfer_args ta;
1001 1576
1002 prepare_cede (&ta); 1577 prepare_cede (aTHX_ &ta);
1578
1579 if (expect_true (ta.prev != ta.next))
1580 {
1003 TRANSFER (ta); 1581 TRANSFER (ta, 1);
1582 return 1;
1583 }
1584 else
1585 return 0;
1004} 1586}
1005 1587
1588static int
1589api_cede_notself (void)
1590{
1591 dTHX;
1592 struct transfer_args ta;
1593
1594 if (prepare_cede_notself (aTHX_ &ta))
1595 {
1596 TRANSFER (ta, 1);
1597 return 1;
1598 }
1599 else
1600 return 0;
1601}
1602
1603static void
1604api_trace (SV *coro_sv, int flags)
1605{
1606 dTHX;
1607 struct coro *coro = SvSTATE (coro_sv);
1608
1609 if (flags & CC_TRACE)
1610 {
1611 if (!coro->cctx)
1612 coro->cctx = cctx_new ();
1613 else if (!(coro->cctx->flags & CC_TRACE))
1614 croak ("cannot enable tracing on coroutine with custom stack");
1615
1616 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1617 }
1618 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1619 {
1620 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1621
1622 if (coro->flags & CF_RUNNING)
1623 PL_runops = RUNOPS_DEFAULT;
1624 else
1625 coro->slot->runops = RUNOPS_DEFAULT;
1626 }
1627}
1628
1006MODULE = Coro::State PACKAGE = Coro::State 1629MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1007 1630
1008PROTOTYPES: DISABLE 1631PROTOTYPES: DISABLE
1009 1632
1010BOOT: 1633BOOT:
1011{ 1634{
1012#ifdef USE_ITHREADS 1635#ifdef USE_ITHREADS
1013 MUTEX_INIT (&coro_mutex); 1636 MUTEX_INIT (&coro_mutex);
1014#endif 1637#endif
1015 BOOT_PAGESIZE; 1638 BOOT_PAGESIZE;
1016 1639
1640 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1641 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1642
1643 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1644 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1645 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1646
1647 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1648 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1649 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1650
1017 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1651 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018 1652
1019 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1653 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1020 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1654 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1021 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1655 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1656 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1022 1657
1023 main_mainstack = PL_mainstack; 1658 main_mainstack = PL_mainstack;
1659 main_top_env = PL_top_env;
1024 1660
1661 while (main_top_env->je_prev)
1662 main_top_env = main_top_env->je_prev;
1663
1025 coroapi.ver = CORO_API_VERSION; 1664 coroapi.ver = CORO_API_VERSION;
1665 coroapi.rev = CORO_API_REVISION;
1026 coroapi.transfer = api_transfer; 1666 coroapi.transfer = api_transfer;
1027 1667
1028 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 1668 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1029} 1669}
1030 1670
1031SV * 1671SV *
1032new (char *klass, ...) 1672new (char *klass, ...)
1033 CODE: 1673 CODE:
1034{ 1674{
1035 struct coro *coro; 1675 struct coro *coro;
1676 MAGIC *mg;
1036 HV *hv; 1677 HV *hv;
1037 int i; 1678 int i;
1038 1679
1039 Newz (0, coro, 1, struct coro); 1680 Newz (0, coro, 1, struct coro);
1040 coro->args = newAV (); 1681 coro->args = newAV ();
1682 coro->flags = CF_NEW;
1041 1683
1684 if (coro_first) coro_first->prev = coro;
1685 coro->next = coro_first;
1686 coro_first = coro;
1687
1042 hv = newHV (); 1688 coro->hv = hv = newHV ();
1043 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 1689 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1690 mg->mg_flags |= MGf_DUP;
1044 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 1691 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1045 1692
1693 av_extend (coro->args, items - 1);
1046 for (i = 1; i < items; i++) 1694 for (i = 1; i < items; i++)
1047 av_push (coro->args, newSVsv (ST (i))); 1695 av_push (coro->args, newSVsv (ST (i)));
1048
1049 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1050 /*coro->stack = 0;*/
1051} 1696}
1052 OUTPUT: 1697 OUTPUT:
1053 RETVAL 1698 RETVAL
1054 1699
1700# these not obviously related functions are all rolled into the same xs
1701# function to increase chances that they all will call transfer with the same
1702# stack offset
1055void 1703void
1056_set_stacklevel (...) 1704_set_stacklevel (...)
1057 ALIAS: 1705 ALIAS:
1058 Coro::State::transfer = 1 1706 Coro::State::transfer = 1
1059 Coro::schedule = 2 1707 Coro::schedule = 2
1060 Coro::cede = 3 1708 Coro::cede = 3
1061 Coro::Cont::yield = 4 1709 Coro::cede_notself = 4
1062 CODE: 1710 CODE:
1063{ 1711{
1064 struct transfer_args ta; 1712 struct transfer_args ta;
1065 1713
1714 PUTBACK;
1066 switch (ix) 1715 switch (ix)
1067 { 1716 {
1068 case 0: 1717 case 0:
1069 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 1718 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1070 ta.next = 0; 1719 ta.next = 0;
1071 ta.flags = TRANSFER_SET_STACKLEVEL;
1072 break; 1720 break;
1073 1721
1074 case 1: 1722 case 1:
1075 if (items != 3) 1723 if (items != 2)
1076 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items); 1724 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1077 1725
1078 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2))); 1726 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1079 break; 1727 break;
1080 1728
1081 case 2: 1729 case 2:
1082 prepare_schedule (&ta); 1730 prepare_schedule (aTHX_ &ta);
1083 break; 1731 break;
1084 1732
1085 case 3: 1733 case 3:
1086 prepare_cede (&ta); 1734 prepare_cede (aTHX_ &ta);
1087 break; 1735 break;
1088 1736
1089 case 4: 1737 case 4:
1090 { 1738 if (!prepare_cede_notself (aTHX_ &ta))
1091 SV *yieldstack; 1739 XSRETURN_EMPTY;
1092 SV *sv;
1093 AV *defav = GvAV (PL_defgv);
1094 1740
1095 yieldstack = *hv_fetch (
1096 (HV *)SvRV (GvSV (coro_current)),
1097 "yieldstack", sizeof ("yieldstack") - 1,
1098 0
1099 );
1100
1101 /* set up @_ -- ugly */
1102 av_clear (defav);
1103 av_fill (defav, items - 1);
1104 while (items--)
1105 av_store (defav, items, SvREFCNT_inc (ST(items)));
1106
1107 sv = av_pop ((AV *)SvRV (yieldstack));
1108 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1109 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1110 ta.flags = 0;
1111 SvREFCNT_dec (sv);
1112 }
1113 break; 1741 break;
1114
1115 } 1742 }
1743 SPAGAIN;
1116 1744
1745 BARRIER;
1746 PUTBACK;
1117 TRANSFER (ta); 1747 TRANSFER (ta, 0);
1748 SPAGAIN; /* might be the sp of a different coroutine now */
1749 /* be extra careful not to ever do anything after TRANSFER */
1118} 1750}
1751
1752bool
1753_destroy (SV *coro_sv)
1754 CODE:
1755 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1756 OUTPUT:
1757 RETVAL
1119 1758
1120void 1759void
1121_clone_state_from (SV *dst, SV *src)
1122 CODE:
1123{
1124 struct coro *coro_src = SvSTATE (src);
1125
1126 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1127
1128 ++coro_src->refcnt;
1129 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1130}
1131
1132void
1133_exit (code) 1760_exit (int code)
1134 int code
1135 PROTOTYPE: $ 1761 PROTOTYPE: $
1136 CODE: 1762 CODE:
1137 _exit (code); 1763 _exit (code);
1138 1764
1765int
1766cctx_stacksize (int new_stacksize = 0)
1767 CODE:
1768 RETVAL = coro_stacksize;
1769 if (new_stacksize)
1770 coro_stacksize = new_stacksize;
1771 OUTPUT:
1772 RETVAL
1773
1774int
1775cctx_count ()
1776 CODE:
1777 RETVAL = cctx_count;
1778 OUTPUT:
1779 RETVAL
1780
1781int
1782cctx_idle ()
1783 CODE:
1784 RETVAL = cctx_idle;
1785 OUTPUT:
1786 RETVAL
1787
1788void
1789list ()
1790 PPCODE:
1791{
1792 struct coro *coro;
1793 for (coro = coro_first; coro; coro = coro->next)
1794 if (coro->hv)
1795 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1796}
1797
1798void
1799call (Coro::State coro, SV *coderef)
1800 ALIAS:
1801 eval = 1
1802 CODE:
1803{
1804 if (coro->mainstack)
1805 {
1806 struct coro temp;
1807
1808 if (!(coro->flags & CF_RUNNING))
1809 {
1810 PUTBACK;
1811 save_perl (aTHX_ &temp);
1812 load_perl (aTHX_ coro);
1813 }
1814
1815 {
1816 dSP;
1817 ENTER;
1818 SAVETMPS;
1819 PUTBACK;
1820 PUSHSTACK;
1821 PUSHMARK (SP);
1822
1823 if (ix)
1824 eval_sv (coderef, 0);
1825 else
1826 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1827
1828 POPSTACK;
1829 SPAGAIN;
1830 FREETMPS;
1831 LEAVE;
1832 PUTBACK;
1833 }
1834
1835 if (!(coro->flags & CF_RUNNING))
1836 {
1837 save_perl (aTHX_ coro);
1838 load_perl (aTHX_ &temp);
1839 SPAGAIN;
1840 }
1841 }
1842}
1843
1844SV *
1845is_ready (Coro::State coro)
1846 PROTOTYPE: $
1847 ALIAS:
1848 is_ready = CF_READY
1849 is_running = CF_RUNNING
1850 is_new = CF_NEW
1851 is_destroyed = CF_DESTROYED
1852 CODE:
1853 RETVAL = boolSV (coro->flags & ix);
1854 OUTPUT:
1855 RETVAL
1856
1857void
1858api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1859
1860SV *
1861has_cctx (Coro::State coro)
1862 PROTOTYPE: $
1863 CODE:
1864 RETVAL = boolSV (!!coro->cctx);
1865 OUTPUT:
1866 RETVAL
1867
1868int
1869is_traced (Coro::State coro)
1870 PROTOTYPE: $
1871 CODE:
1872 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1873 OUTPUT:
1874 RETVAL
1875
1876IV
1877rss (Coro::State coro)
1878 PROTOTYPE: $
1879 ALIAS:
1880 usecount = 1
1881 CODE:
1882 switch (ix)
1883 {
1884 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1885 case 1: RETVAL = coro->usecount; break;
1886 }
1887 OUTPUT:
1888 RETVAL
1889
1890void
1891force_cctx ()
1892 CODE:
1893 struct coro *coro = SvSTATE (coro_current);
1894 coro->cctx->idle_sp = 0;
1895
1139MODULE = Coro::State PACKAGE = Coro 1896MODULE = Coro::State PACKAGE = Coro
1140 1897
1141BOOT: 1898BOOT:
1142{ 1899{
1143 int i; 1900 int i;
1144 1901
1902 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1903 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1904 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1905
1906 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1907 SvREADONLY_on (coro_current);
1908
1145 coro_stash = gv_stashpv ("Coro", TRUE); 1909 coro_stash = gv_stashpv ("Coro", TRUE);
1146 1910
1147 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1911 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1148 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1912 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1149 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1913 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1150 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1914 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1151 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1915 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1152 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1916 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1153 1917
1154 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1155 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1156
1157 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1918 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158 coro_ready[i] = newAV (); 1919 coro_ready[i] = newAV ();
1159 1920
1160 { 1921 {
1161 SV *sv = perl_get_sv("Coro::API", 1); 1922 SV *sv = perl_get_sv ("Coro::API", TRUE);
1923 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1162 1924
1163 coroapi.schedule = api_schedule; 1925 coroapi.schedule = api_schedule;
1164 coroapi.cede = api_cede; 1926 coroapi.cede = api_cede;
1927 coroapi.cede_notself = api_cede_notself;
1165 coroapi.ready = api_ready; 1928 coroapi.ready = api_ready;
1929 coroapi.is_ready = api_is_ready;
1166 coroapi.nready = &coro_nready; 1930 coroapi.nready = &coro_nready;
1167 coroapi.current = coro_current; 1931 coroapi.current = coro_current;
1168 1932
1169 GCoroAPI = &coroapi; 1933 GCoroAPI = &coroapi;
1170 sv_setiv (sv, (IV)&coroapi); 1934 sv_setiv (sv, (IV)&coroapi);
1171 SvREADONLY_on (sv); 1935 SvREADONLY_on (sv);
1172 } 1936 }
1173} 1937}
1938
1939void
1940_set_current (SV *current)
1941 PROTOTYPE: $
1942 CODE:
1943 SvREFCNT_dec (SvRV (coro_current));
1944 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1945
1946void
1947_set_readyhook (SV *hook)
1948 PROTOTYPE: $
1949 CODE:
1950 LOCK;
1951 SvREFCNT_dec (coro_readyhook);
1952 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1953 UNLOCK;
1174 1954
1175int 1955int
1176prio (Coro::State coro, int newprio = 0) 1956prio (Coro::State coro, int newprio = 0)
1177 ALIAS: 1957 ALIAS:
1178 nice = 1 1958 nice = 1
… …
1181 RETVAL = coro->prio; 1961 RETVAL = coro->prio;
1182 1962
1183 if (items > 1) 1963 if (items > 1)
1184 { 1964 {
1185 if (ix) 1965 if (ix)
1186 newprio += coro->prio; 1966 newprio = coro->prio - newprio;
1187 1967
1188 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 1968 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1189 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 1969 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1190 1970
1191 coro->prio = newprio; 1971 coro->prio = newprio;
1192 } 1972 }
1193} 1973}
1974 OUTPUT:
1975 RETVAL
1194 1976
1195void 1977SV *
1196ready (SV *self) 1978ready (SV *self)
1197 PROTOTYPE: $ 1979 PROTOTYPE: $
1198 CODE: 1980 CODE:
1199 api_ready (self); 1981 RETVAL = boolSV (api_ready (self));
1982 OUTPUT:
1983 RETVAL
1200 1984
1201int 1985int
1202nready (...) 1986nready (...)
1203 PROTOTYPE: 1987 PROTOTYPE:
1204 CODE: 1988 CODE:
1205 RETVAL = coro_nready; 1989 RETVAL = coro_nready;
1206 OUTPUT: 1990 OUTPUT:
1207 RETVAL 1991 RETVAL
1208 1992
1993void
1994throw (Coro::State self, SV *throw = &PL_sv_undef)
1995 PROTOTYPE: $;$
1996 CODE:
1997 SvREFCNT_dec (self->throw);
1998 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1999
2000void
2001swap_defsv (Coro::State self)
2002 PROTOTYPE: $
2003 ALIAS:
2004 swap_defav = 1
2005 CODE:
2006 if (!self->slot)
2007 croak ("cannot swap state with coroutine that has no saved state");
2008 else
2009 {
2010 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2011 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2012
2013 SV *tmp = *src; *src = *dst; *dst = tmp;
2014 }
2015
2016# for async_pool speedup
2017void
2018_pool_1 (SV *cb)
2019 CODE:
2020{
2021 struct coro *coro = SvSTATE (coro_current);
2022 HV *hv = (HV *)SvRV (coro_current);
2023 AV *defav = GvAV (PL_defgv);
2024 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2025 AV *invoke_av;
2026 int i, len;
2027
2028 if (!invoke)
2029 {
2030 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
2031 croak ("\3async_pool terminate\2\n");
2032 }
2033
2034 SvREFCNT_dec (coro->saved_deffh);
2035 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2036
2037 hv_store (hv, "desc", sizeof ("desc") - 1,
2038 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2039
2040 invoke_av = (AV *)SvRV (invoke);
2041 len = av_len (invoke_av);
2042
2043 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2044
2045 if (len > 0)
2046 {
2047 av_fill (defav, len - 1);
2048 for (i = 0; i < len; ++i)
2049 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2050 }
2051
2052 SvREFCNT_dec (invoke);
2053}
2054
2055void
2056_pool_2 (SV *cb)
2057 CODE:
2058{
2059 struct coro *coro = SvSTATE (coro_current);
2060
2061 sv_setsv (cb, &PL_sv_undef);
2062
2063 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2064 coro->saved_deffh = 0;
2065
2066 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2067 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2068 {
2069 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
2070 croak ("\3async_pool terminate\2\n");
2071 }
2072
2073 av_clear (GvAV (PL_defgv));
2074 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2075 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2076
2077 coro->prio = 0;
2078
2079 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2080 api_trace (coro_current, 0);
2081
2082 av_push (av_async_pool, newSVsv (coro_current));
2083}
2084
2085
1209MODULE = Coro::State PACKAGE = Coro::AIO 2086MODULE = Coro::State PACKAGE = Coro::AIO
1210 2087
1211SV * 2088SV *
1212_get_state () 2089_get_state ()
1213 CODE: 2090 CODE:
1214{ 2091{
1215 struct { 2092 struct io_state *data;
1216 int errorno;
1217 int laststype;
1218 int laststatval;
1219 Stat_t statcache;
1220 } data;
1221 2093
2094 RETVAL = newSV (sizeof (struct io_state));
2095 data = (struct io_state *)SvPVX (RETVAL);
2096 SvCUR_set (RETVAL, sizeof (struct io_state));
2097 SvPOK_only (RETVAL);
2098
1222 data.errorno = errno; 2099 data->errorno = errno;
1223 data.laststype = PL_laststype; 2100 data->laststype = PL_laststype;
1224 data.laststatval = PL_laststatval; 2101 data->laststatval = PL_laststatval;
1225 data.statcache = PL_statcache; 2102 data->statcache = PL_statcache;
1226
1227 RETVAL = newSVpvn ((char *)&data, sizeof data);
1228} 2103}
1229 OUTPUT: 2104 OUTPUT:
1230 RETVAL 2105 RETVAL
1231 2106
1232void 2107void
1233_set_state (char *data_) 2108_set_state (char *data_)
1234 PROTOTYPE: $ 2109 PROTOTYPE: $
1235 CODE: 2110 CODE:
1236{ 2111{
1237 struct { 2112 struct io_state *data = (void *)data_;
1238 int errorno;
1239 int laststype;
1240 int laststatval;
1241 Stat_t statcache;
1242 } *data = (void *)data_;
1243 2113
1244 errno = data->errorno; 2114 errno = data->errorno;
1245 PL_laststype = data->laststype; 2115 PL_laststype = data->laststype;
1246 PL_laststatval = data->laststatval; 2116 PL_laststatval = data->laststatval;
1247 PL_statcache = data->statcache; 2117 PL_statcache = data->statcache;
1248} 2118}
2119
2120
2121MODULE = Coro::State PACKAGE = Coro::AnyEvent
2122
2123BOOT:
2124 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2125
2126SV *
2127_schedule (...)
2128 PROTOTYPE: @
2129 CODE:
2130{
2131 static int incede;
2132
2133 api_cede_notself ();
2134
2135 ++incede;
2136 while (coro_nready >= incede && api_cede ())
2137 ;
2138
2139 sv_setsv (sv_activity, &PL_sv_undef);
2140 if (coro_nready >= incede)
2141 {
2142 PUSHMARK (SP);
2143 PUTBACK;
2144 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2145 SPAGAIN;
2146 }
2147
2148 --incede;
2149}
2150

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