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Comparing Coro/Coro/State.xs (file contents):
Revision 1.52 by pcg, Sun Nov 30 22:49:25 2003 UTC vs.
Revision 1.268 by root, Fri Nov 14 06:41:41 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "patchlevel.h" 11#include "patchlevel.h"
6 12
7#if PATCHLEVEL < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
8# ifndef PL_ppaddr 63# ifndef PL_ppaddr
9# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
10# endif 65# endif
11# ifndef call_sv 66# ifndef call_sv
12# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
23# ifndef IS_PADCONST 78# ifndef IS_PADCONST
24# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
25# endif 80# endif
26#endif 81#endif
27 82
28#include "libcoro/coro.c" 83/* 5.11 */
29 84#ifndef CxHASARGS
30#include <signal.h> 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
31
32#ifdef HAVE_MMAP
33# include <unistd.h>
34# include <sys/mman.h>
35# ifndef MAP_ANONYMOUS
36# ifdef MAP_ANON
37# define MAP_ANONYMOUS MAP_ANON
38# else
39# undef HAVE_MMAP
40# endif 86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
41# endif 153# endif
42#endif
43 154
44#define SUB_INIT "Coro::State::initialize" 155#else
45#define UCORO_STATE "_coro_state"
46 156
47/* The next macro should declare a variable stacklevel that contains and approximation 157# define LOCK (void)0
48 * to the current C stack pointer. Its property is that it changes with each call 158# define UNLOCK (void)0
49 * and should be unique. */
50#define dSTACKLEVEL void *stacklevel = &stacklevel
51 159
52#define IN_DESTRUCT (PL_main_cv == Nullcv) 160#endif
53 161
54#define labs(l) ((l) >= 0 ? (l) : -(l)) 162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
55 166
56#include "CoroAPI.h" 167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
57 176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
58static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
59 187
60/* this is actually not only the c stack but also c registers etc... */ 188struct transfer_args
189{
190 struct coro *prev, *next;
191};
192
193static GV *irsgv; /* $/ */
194static GV *stdoutgv; /* *STDOUT */
195static SV *rv_diehook;
196static SV *rv_warnhook;
197static HV *hv_sig; /* %SIG */
198
199/* async_pool helper stuff */
200static SV *sv_pool_rss;
201static SV *sv_pool_size;
202static AV *av_async_pool;
203
204/* Coro::AnyEvent */
205static SV *sv_activity;
206
207static struct coro_cctx *cctx_first;
208static int cctx_count, cctx_idle;
209
210enum {
211 CC_MAPPED = 0x01,
212 CC_NOREUSE = 0x02, /* throw this away after tracing */
213 CC_TRACE = 0x04,
214 CC_TRACE_SUB = 0x08, /* trace sub calls */
215 CC_TRACE_LINE = 0x10, /* trace each statement */
216 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
217};
218
219/* this is a structure representing a c-level coroutine */
220typedef struct coro_cctx {
221 struct coro_cctx *next;
222
223 /* the stack */
224 void *sptr;
225 size_t ssize;
226
227 /* cpu state */
228 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
229 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
230 JMPENV *top_env;
231 coro_context cctx;
232
233 U32 gen;
234#if CORO_USE_VALGRIND
235 int valgrind_id;
236#endif
237 unsigned char flags;
238} coro_cctx;
239
240enum {
241 CF_RUNNING = 0x0001, /* coroutine is running */
242 CF_READY = 0x0002, /* coroutine is ready */
243 CF_NEW = 0x0004, /* has never been switched to */
244 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
245};
246
247/* the structure where most of the perl state is stored, overlaid on the cxstack */
61typedef struct { 248typedef struct {
62 int refcnt; /* pointer reference counter */ 249 SV *defsv;
63 int usecnt; /* shared by how many coroutines */ 250 AV *defav;
64 int gencnt; /* generation counter */ 251 SV *errsv;
252 SV *irsgv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
65 257
66 coro_context cctx; 258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
67 259
68 void *sptr; 260/* this is a structure representing a perl-level coroutine */
69 long ssize; /* positive == mmap, otherwise malloc */
70} coro_stack;
71
72struct coro { 261struct coro {
73 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 262 /* the c coroutine allocated to this perl coroutine, if any */
74 JMPENV start_env; 263 coro_cctx *cctx;
75 264
76 /* the optional C context */ 265 /* process data */
77 coro_stack *stack;
78 void *cursp;
79 int gencnt;
80
81 /* optionally saved, might be zero */
82 AV *defav;
83 SV *defsv;
84 SV *errsv;
85
86 /* saved global state not related to stacks */
87 U8 dowarn;
88 I32 in_eval;
89
90 /* the stacks and related info (callchain etc..) */
91 PERL_SI *curstackinfo;
92 AV *curstack;
93 AV *mainstack; 266 AV *mainstack;
94 SV **stack_sp; 267 perl_slots *slot; /* basically the saved sp */
95 OP *op;
96 SV **curpad;
97 AV *comppad;
98 SV **stack_base;
99 SV **stack_max;
100 SV **tmps_stack;
101 I32 tmps_floor;
102 I32 tmps_ix;
103 I32 tmps_max;
104 I32 *markstack;
105 I32 *markstack_ptr;
106 I32 *markstack_max;
107 I32 *scopestack;
108 I32 scopestack_ix;
109 I32 scopestack_max;
110 ANY *savestack;
111 I32 savestack_ix;
112 I32 savestack_max;
113 OP **retstack;
114 I32 retstack_ix;
115 I32 retstack_max;
116 COP *curcop;
117 JMPENV *top_env;
118 268
119 /* data associated with this coroutine (initial args) */ 269 AV *args; /* data associated with this coroutine (initial args) */
120 AV *args; 270 int refcnt; /* coroutines are refcounted, yes */
271 int flags; /* CF_ flags */
272 HV *hv; /* the perl hash associated with this coro, if any */
273
274 /* statistics */
275 int usecount; /* number of transfers to this coro */
276
277 /* coro process data */
278 int prio;
279 SV *throw; /* exception to be thrown */
280
281 /* async_pool */
282 SV *saved_deffh;
283
284 /* linked list */
285 struct coro *next, *prev;
121}; 286};
122 287
123typedef struct coro *Coro__State; 288typedef struct coro *Coro__State;
124typedef struct coro *Coro__State_or_hashref; 289typedef struct coro *Coro__State_or_hashref;
125 290
126static AV *main_mainstack; /* used to differentiate between $main and others */ 291/** Coro ********************************************************************/
127static HV *coro_state_stash;
128static SV *ucoro_state_sv;
129static U32 ucoro_state_hash;
130static HV *padlist_cache;
131static SV *coro_mortal; /* will be freed after next transfer */
132 292
133/* mostly copied from op.c:cv_clone2 */ 293#define PRIO_MAX 3
134STATIC AV * 294#define PRIO_HIGH 1
135clone_padlist (AV *protopadlist) 295#define PRIO_NORMAL 0
296#define PRIO_LOW -1
297#define PRIO_IDLE -3
298#define PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static int coro_nready;
305static struct coro *coro_first;
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
136{ 311{
137 AV *av; 312#if PERL_VERSION_ATLEAST (5,10,0)
138 I32 ix; 313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
139 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 314 get_sv (name, create);
140 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 315#endif
141 SV **pname = AvARRAY (protopad_name); 316 return get_sv (name, create);
142 SV **ppad = AvARRAY (protopad); 317}
143 I32 fname = AvFILLp (protopad_name); 318
144 I32 fpad = AvFILLp (protopad); 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339static AV *
340coro_clone_padlist (pTHX_ CV *cv)
341{
342 AV *padlist = CvPADLIST (cv);
145 AV *newpadlist, *newpad_name, *newpad; 343 AV *newpadlist, *newpad;
146 SV **npad;
147
148 newpad_name = newAV ();
149 for (ix = fname; ix >= 0; ix--)
150 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152 newpad = newAV ();
153 av_fill (newpad, AvFILLp (protopad));
154 npad = AvARRAY (newpad);
155 344
156 newpadlist = newAV (); 345 newpadlist = newAV ();
157 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
158 av_store (newpadlist, 0, (SV *) newpad_name); 347#if PERL_VERSION_ATLEAST (5,10,0)
348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
349#else
350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif
352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
353 --AvFILLp (padlist);
354
355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
159 av_store (newpadlist, 1, (SV *) newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
160
161 av = newAV (); /* will be @_ */
162 av_extend (av, 0);
163 av_store (newpad, 0, (SV *) av);
164 AvFLAGS (av) = AVf_REIFY;
165
166 for (ix = fpad; ix > 0; ix--)
167 {
168 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169 if (namesv && namesv != &PL_sv_undef)
170 {
171 char *name = SvPVX (namesv); /* XXX */
172 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173 { /* lexical from outside? */
174 npad[ix] = SvREFCNT_inc (ppad[ix]);
175 }
176 else
177 { /* our own lexical */
178 SV *sv;
179 if (*name == '&')
180 sv = SvREFCNT_inc (ppad[ix]);
181 else if (*name == '@')
182 sv = (SV *) newAV ();
183 else if (*name == '%')
184 sv = (SV *) newHV ();
185 else
186 sv = NEWSV (0, 0);
187#ifdef SvPADBUSY
188 if (!SvPADBUSY (sv))
189#endif
190 SvPADMY_on (sv);
191 npad[ix] = sv;
192 }
193 }
194 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195 {
196 npad[ix] = SvREFCNT_inc (ppad[ix]);
197 }
198 else
199 {
200 SV *sv = NEWSV (0, 0);
201 SvPADTMP_on (sv);
202 npad[ix] = sv;
203 }
204 }
205
206#if 0 /* return -ENOTUNDERSTOOD */
207 /* Now that vars are all in place, clone nested closures. */
208
209 for (ix = fpad; ix > 0; ix--) {
210 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211 if (namesv
212 && namesv != &PL_sv_undef
213 && !(SvFLAGS(namesv) & SVf_FAKE)
214 && *SvPVX(namesv) == '&'
215 && CvCLONE(ppad[ix]))
216 {
217 CV *kid = cv_clone((CV*)ppad[ix]);
218 SvREFCNT_dec(ppad[ix]);
219 CvCLONE_on(kid);
220 SvPADMY_on(kid);
221 npad[ix] = (SV*)kid;
222 }
223 }
224#endif
225 357
226 return newpadlist; 358 return newpadlist;
227} 359}
228 360
229STATIC void 361static void
230free_padlist (AV *padlist) 362free_padlist (pTHX_ AV *padlist)
231{ 363{
232 /* may be during global destruction */ 364 /* may be during global destruction */
233 if (SvREFCNT (padlist)) 365 if (SvREFCNT (padlist))
234 { 366 {
235 I32 i = AvFILLp (padlist); 367 I32 i = AvFILLp (padlist);
… …
248 380
249 SvREFCNT_dec ((SV*)padlist); 381 SvREFCNT_dec ((SV*)padlist);
250 } 382 }
251} 383}
252 384
253STATIC int 385static int
254coro_cv_free (SV *sv, MAGIC *mg) 386coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255{ 387{
256 AV *padlist; 388 AV *padlist;
257 AV *av = (AV *)mg->mg_obj; 389 AV *av = (AV *)mg->mg_obj;
258 390
259 /* casting is fun. */ 391 /* casting is fun. */
260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261 free_padlist (padlist); 393 free_padlist (aTHX_ padlist);
262}
263 394
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396
397 return 0;
398}
399
264#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
265 402
266static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
267 443
268/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
269STATIC void 445static void
270get_padlist (CV *cv) 446get_padlist (pTHX_ CV *cv)
271{ 447{
272 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
273 450
274 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
275 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276 else 453 else
277 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
278}
279
280STATIC void
281put_padlist (CV *cv)
282{
283 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
284
285 if (!mg)
286 { 454 {
287 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 455#if CORO_PREFER_PERL_FUNCTIONS
288 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 456 /* this is probably cleaner? but also slower! */
289 mg->mg_virtual = &vtbl_coro; 457 /* in practise, it seems to be less stable */
290 mg->mg_obj = (SV *)newAV (); 458 CV *cp = Perl_cv_clone (cv);
459 CvPADLIST (cv) = CvPADLIST (cp);
460 CvPADLIST (cp) = 0;
461 SvREFCNT_dec (cp);
462#else
463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
464#endif
291 } 465 }
292
293 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
294} 466}
295
296#define SB do {
297#define SE } while (0)
298
299#define LOAD(state) load_state(aTHX_ (state));
300#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
301
302#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
303 467
304static void 468static void
469put_padlist (pTHX_ CV *cv)
470{
471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
473
474 if (expect_false (!mg))
475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
476
477 av = (AV *)mg->mg_obj;
478
479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
480 av_extend (av, AvMAX (av) + 1);
481
482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
483}
484
485/** load & save, init *******************************************************/
486
487static void
305load_state(pTHX_ Coro__State c) 488load_perl (pTHX_ Coro__State c)
306{ 489{
307 PL_dowarn = c->dowarn; 490 perl_slots *slot = c->slot;
308 PL_in_eval = c->in_eval; 491 c->slot = 0;
309 492
310 PL_curstackinfo = c->curstackinfo;
311 PL_curstack = c->curstack;
312 PL_mainstack = c->mainstack; 493 PL_mainstack = c->mainstack;
313 PL_stack_sp = c->stack_sp;
314 PL_op = c->op;
315 PL_curpad = c->curpad;
316 PL_comppad = c->comppad;
317 PL_stack_base = c->stack_base;
318 PL_stack_max = c->stack_max;
319 PL_tmps_stack = c->tmps_stack;
320 PL_tmps_floor = c->tmps_floor;
321 PL_tmps_ix = c->tmps_ix;
322 PL_tmps_max = c->tmps_max;
323 PL_markstack = c->markstack;
324 PL_markstack_ptr = c->markstack_ptr;
325 PL_markstack_max = c->markstack_max;
326 PL_scopestack = c->scopestack;
327 PL_scopestack_ix = c->scopestack_ix;
328 PL_scopestack_max = c->scopestack_max;
329 PL_savestack = c->savestack;
330 PL_savestack_ix = c->savestack_ix;
331 PL_savestack_max = c->savestack_max;
332 PL_retstack = c->retstack;
333 PL_retstack_ix = c->retstack_ix;
334 PL_retstack_max = c->retstack_max;
335 PL_curcop = c->curcop;
336 PL_top_env = c->top_env;
337 494
338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 495 GvSV (PL_defgv) = slot->defsv;
339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 496 GvAV (PL_defgv) = slot->defav;
340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
500 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h"
502 #undef VAR
341 503
342 { 504 {
343 dSP; 505 dSP;
506
344 CV *cv; 507 CV *cv;
345 508
346 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
347 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
348 { 511 {
349 AV *padlist = (AV *)POPs;
350
351 if (padlist)
352 {
353 put_padlist (cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
354 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
355#ifdef USE_THREADS 514 CvPADLIST (cv) = (AV *)POPs;
356 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357#endif
358 }
359
360 ++CvDEPTH(cv);
361 } 515 }
362 516
363 PUTBACK; 517 PUTBACK;
364 } 518 }
365} 519}
366 520
367static void 521static void
368save_state(pTHX_ Coro__State c, int flags) 522save_perl (pTHX_ Coro__State c)
369{ 523{
370 { 524 {
371 dSP; 525 dSP;
372 I32 cxix = cxstack_ix; 526 I32 cxix = cxstack_ix;
373 PERL_CONTEXT *ccstk = cxstack; 527 PERL_CONTEXT *ccstk = cxstack;
… …
376 /* 530 /*
377 * the worst thing you can imagine happens first - we have to save 531 * the worst thing you can imagine happens first - we have to save
378 * (and reinitialize) all cv's in the whole callchain :( 532 * (and reinitialize) all cv's in the whole callchain :(
379 */ 533 */
380 534
381 PUSHs (Nullsv); 535 XPUSHs (Nullsv);
382 /* this loop was inspired by pp_caller */ 536 /* this loop was inspired by pp_caller */
383 for (;;) 537 for (;;)
384 { 538 {
385 while (cxix >= 0) 539 while (expect_true (cxix >= 0))
386 { 540 {
387 PERL_CONTEXT *cx = &ccstk[cxix--]; 541 PERL_CONTEXT *cx = &ccstk[cxix--];
388 542
389 if (CxTYPE(cx) == CXt_SUB) 543 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
390 { 544 {
391 CV *cv = cx->blk_sub.cv; 545 CV *cv = cx->blk_sub.cv;
546
392 if (CvDEPTH(cv)) 547 if (expect_true (CvDEPTH (cv)))
393 { 548 {
394#ifdef USE_THREADS
395 /*XPUSHs ((SV *)CvOWNER(cv));*/
396 /*CvOWNER(cv) = 0;*/
397 /*error must unlock this cv etc.. etc...*/
398#endif
399 EXTEND (SP, CvDEPTH(cv)*2); 549 EXTEND (SP, 3);
400
401 while (--CvDEPTH(cv))
402 {
403 /* this tells the restore code to increment CvDEPTH */
404 PUSHs (Nullsv);
405 PUSHs ((SV *)cv);
406 }
407
408 PUSHs ((SV *)CvPADLIST(cv)); 550 PUSHs ((SV *)CvPADLIST (cv));
551 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
409 PUSHs ((SV *)cv); 552 PUSHs ((SV *)cv);
410 553
411 get_padlist (cv); /* this is a monster */ 554 CvDEPTH (cv) = 0;
555 get_padlist (aTHX_ cv);
412 } 556 }
413 } 557 }
414#ifdef CXt_FORMAT
415 else if (CxTYPE(cx) == CXt_FORMAT)
416 {
417 /* I never used formats, so how should I know how these are implemented? */
418 /* my bold guess is as a simple, plain sub... */
419 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
420 }
421#endif
422 } 558 }
423 559
424 if (top_si->si_type == PERLSI_MAIN) 560 if (expect_true (top_si->si_type == PERLSI_MAIN))
425 break; 561 break;
426 562
427 top_si = top_si->si_prev; 563 top_si = top_si->si_prev;
428 ccstk = top_si->si_cxstack; 564 ccstk = top_si->si_cxstack;
429 cxix = top_si->si_cxix; 565 cxix = top_si->si_cxix;
430 } 566 }
431 567
432 PUTBACK; 568 PUTBACK;
433 } 569 }
434 570
435 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 571 /* allocate some space on the context stack for our purposes */
436 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 572 /* we manually unroll here, as usually 2 slots is enough */
437 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 573 if (SLOT_COUNT >= 1) CXINC;
574 if (SLOT_COUNT >= 2) CXINC;
575 if (SLOT_COUNT >= 3) CXINC;
576 {
577 int i;
578 for (i = 3; i < SLOT_COUNT; ++i)
579 CXINC;
580 }
581 cxstack_ix -= SLOT_COUNT; /* undo allocation */
438 582
439 c->dowarn = PL_dowarn;
440 c->in_eval = PL_in_eval;
441
442 c->curstackinfo = PL_curstackinfo;
443 c->curstack = PL_curstack;
444 c->mainstack = PL_mainstack; 583 c->mainstack = PL_mainstack;
445 c->stack_sp = PL_stack_sp; 584
446 c->op = PL_op; 585 {
447 c->curpad = PL_curpad; 586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
448 c->comppad = PL_comppad; 587
449 c->stack_base = PL_stack_base; 588 slot->defav = GvAV (PL_defgv);
450 c->stack_max = PL_stack_max; 589 slot->defsv = DEFSV;
451 c->tmps_stack = PL_tmps_stack; 590 slot->errsv = ERRSV;
452 c->tmps_floor = PL_tmps_floor; 591 slot->irsgv = GvSV (irsgv);
453 c->tmps_ix = PL_tmps_ix; 592
454 c->tmps_max = PL_tmps_max; 593 #define VAR(name,type) slot->name = PL_ ## name;
455 c->markstack = PL_markstack; 594 # include "state.h"
456 c->markstack_ptr = PL_markstack_ptr; 595 #undef VAR
457 c->markstack_max = PL_markstack_max; 596 }
458 c->scopestack = PL_scopestack;
459 c->scopestack_ix = PL_scopestack_ix;
460 c->scopestack_max = PL_scopestack_max;
461 c->savestack = PL_savestack;
462 c->savestack_ix = PL_savestack_ix;
463 c->savestack_max = PL_savestack_max;
464 c->retstack = PL_retstack;
465 c->retstack_ix = PL_retstack_ix;
466 c->retstack_max = PL_retstack_max;
467 c->curcop = PL_curcop;
468 c->top_env = PL_top_env;
469} 597}
470 598
471/* 599/*
472 * allocate various perl stacks. This is an exact copy 600 * allocate various perl stacks. This is an exact copy
473 * of perl.c:init_stacks, except that it uses less memory 601 * of perl.c:init_stacks, except that it uses less memory
474 * on the (sometimes correct) assumption that coroutines do 602 * on the (sometimes correct) assumption that coroutines do
475 * not usually need a lot of stackspace. 603 * not usually need a lot of stackspace.
476 */ 604 */
477STATIC void 605#if CORO_PREFER_PERL_FUNCTIONS
606# define coro_init_stacks init_stacks
607#else
608static void
478coro_init_stacks (pTHX) 609coro_init_stacks (pTHX)
479{ 610{
480 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 611 PL_curstackinfo = new_stackinfo(32, 8);
481 PL_curstackinfo->si_type = PERLSI_MAIN; 612 PL_curstackinfo->si_type = PERLSI_MAIN;
482 PL_curstack = PL_curstackinfo->si_stack; 613 PL_curstack = PL_curstackinfo->si_stack;
483 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 614 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
484 615
485 PL_stack_base = AvARRAY(PL_curstack); 616 PL_stack_base = AvARRAY(PL_curstack);
486 PL_stack_sp = PL_stack_base; 617 PL_stack_sp = PL_stack_base;
487 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 618 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
488 619
489 New(50,PL_tmps_stack,96,SV*); 620 New(50,PL_tmps_stack,32,SV*);
490 PL_tmps_floor = -1; 621 PL_tmps_floor = -1;
491 PL_tmps_ix = -1; 622 PL_tmps_ix = -1;
492 PL_tmps_max = 96; 623 PL_tmps_max = 32;
493 624
494 New(54,PL_markstack,16,I32); 625 New(54,PL_markstack,16,I32);
495 PL_markstack_ptr = PL_markstack; 626 PL_markstack_ptr = PL_markstack;
496 PL_markstack_max = PL_markstack + 16; 627 PL_markstack_max = PL_markstack + 16;
497 628
498#ifdef SET_MARK_OFFSET 629#ifdef SET_MARK_OFFSET
499 SET_MARK_OFFSET; 630 SET_MARK_OFFSET;
500#endif 631#endif
501 632
502 New(54,PL_scopestack,16,I32); 633 New(54,PL_scopestack,8,I32);
503 PL_scopestack_ix = 0; 634 PL_scopestack_ix = 0;
504 PL_scopestack_max = 16; 635 PL_scopestack_max = 8;
505 636
506 New(54,PL_savestack,96,ANY); 637 New(54,PL_savestack,24,ANY);
507 PL_savestack_ix = 0; 638 PL_savestack_ix = 0;
508 PL_savestack_max = 96; 639 PL_savestack_max = 24;
509 640
641#if !PERL_VERSION_ATLEAST (5,10,0)
510 New(54,PL_retstack,8,OP*); 642 New(54,PL_retstack,4,OP*);
511 PL_retstack_ix = 0; 643 PL_retstack_ix = 0;
512 PL_retstack_max = 8; 644 PL_retstack_max = 4;
645#endif
513} 646}
647#endif
514 648
515/* 649/*
516 * destroy the stacks, the callchain etc... 650 * destroy the stacks, the callchain etc...
517 */ 651 */
518STATIC void 652static void
519destroy_stacks(pTHX) 653coro_destruct_stacks (pTHX)
520{ 654{
521 if (!IN_DESTRUCT)
522 {
523 /* is this ugly, I ask? */
524 LEAVE_SCOPE (0);
525
526 /* sure it is, but more important: is it correct?? :/ */
527 FREETMPS;
528 }
529
530 while (PL_curstackinfo->si_next) 655 while (PL_curstackinfo->si_next)
531 PL_curstackinfo = PL_curstackinfo->si_next; 656 PL_curstackinfo = PL_curstackinfo->si_next;
532 657
533 while (PL_curstackinfo) 658 while (PL_curstackinfo)
534 { 659 {
535 PERL_SI *p = PL_curstackinfo->si_prev; 660 PERL_SI *p = PL_curstackinfo->si_prev;
536 661
537 {
538 dSP;
539 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
540 PUTBACK; /* possibly superfluous */
541 }
542
543 if (!IN_DESTRUCT) 662 if (!IN_DESTRUCT)
544 {
545 dounwind(-1);
546 SvREFCNT_dec(PL_curstackinfo->si_stack); 663 SvREFCNT_dec (PL_curstackinfo->si_stack);
547 }
548 664
549 Safefree(PL_curstackinfo->si_cxstack); 665 Safefree (PL_curstackinfo->si_cxstack);
550 Safefree(PL_curstackinfo); 666 Safefree (PL_curstackinfo);
551 PL_curstackinfo = p; 667 PL_curstackinfo = p;
552 } 668 }
553 669
554 Safefree(PL_tmps_stack); 670 Safefree (PL_tmps_stack);
555 Safefree(PL_markstack); 671 Safefree (PL_markstack);
556 Safefree(PL_scopestack); 672 Safefree (PL_scopestack);
557 Safefree(PL_savestack); 673 Safefree (PL_savestack);
674#if !PERL_VERSION_ATLEAST (5,10,0)
558 Safefree(PL_retstack); 675 Safefree (PL_retstack);
676#endif
677}
678
679static size_t
680coro_rss (pTHX_ struct coro *coro)
681{
682 size_t rss = sizeof (*coro);
683
684 if (coro->mainstack)
685 {
686 perl_slots tmp_slot;
687 perl_slots *slot;
688
689 if (coro->flags & CF_RUNNING)
690 {
691 slot = &tmp_slot;
692
693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR
696 }
697 else
698 slot = coro->slot;
699
700 if (slot)
701 {
702 rss += sizeof (slot->curstackinfo);
703 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
705 rss += slot->tmps_max * sizeof (SV *);
706 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
707 rss += slot->scopestack_max * sizeof (I32);
708 rss += slot->savestack_max * sizeof (ANY);
709
710#if !PERL_VERSION_ATLEAST (5,10,0)
711 rss += slot->retstack_max * sizeof (OP *);
712#endif
713 }
714 }
715
716 return rss;
717}
718
719/** set stacklevel support **************************************************/
720
721/* we sometimes need to create the effect of pp_set_stacklevel calling us */
722#define SSL_HEAD (void)0
723/* we sometimes need to create the effect of leaving via pp_set_stacklevel */
724#define SSL_TAIL set_stacklevel_tail (aTHX)
725
726INLINE void
727set_stacklevel_tail (pTHX)
728{
729 dSP;
730 SV **bot = SP;
731
732 int gimme = GIMME_V;
733
734 /* make sure we put something on the stack in scalar context */
735 if (gimme == G_SCALAR)
736 {
737 if (sp == bot)
738 XPUSHs (&PL_sv_undef);
739
740 SP = bot + 1;
741 }
742
743 PUTBACK;
744}
745
746/** coroutine stack handling ************************************************/
747
748static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
749static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
750static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
751
752/* apparently < 5.8.8 */
753#ifndef MgPV_nolen_const
754#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
755 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
756 (const char*)(mg)->mg_ptr)
757#endif
758
759/*
760 * This overrides the default magic get method of %SIG elements.
761 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
762 * and instead of tryign to save and restore the hash elements, we just provide
763 * readback here.
764 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
765 * not expecting this to actually change the hook. This is a potential problem
766 * when a schedule happens then, but we ignore this.
767 */
768static int
769coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
770{
771 const char *s = MgPV_nolen_const (mg);
772
773 if (*s == '_')
774 {
775 SV **svp = 0;
776
777 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
778 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
779
780 if (svp)
781 {
782 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = 0;
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
812}
813
814static int
815coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
816{
817 const char *s = MgPV_nolen_const (mg);
818
819 if (*s == '_')
820 {
821 SV **svp = 0;
822
823 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
824 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
825
826 if (svp)
827 {
828 SV *old = *svp;
829 *svp = newSVsv (sv);
830 SvREFCNT_dec (old);
831 return 0;
832 }
833 }
834
835 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
559} 836}
560 837
561static void 838static void
562allocate_stack (Coro__State ctx, int alloc) 839coro_setup (pTHX_ struct coro *coro)
563{
564 coro_stack *stack;
565
566 New (0, stack, 1, coro_stack);
567
568 stack->refcnt = 1;
569 stack->usecnt = 1;
570 stack->gencnt = ctx->gencnt = 0;
571 if (alloc)
572 {
573#if HAVE_MMAP
574 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
575 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
576 if (stack->sptr == (void *)-1)
577#endif
578 {
579 /*FIXME*//*D*//* reasonable stack size! */
580 stack->ssize = - (16384 * sizeof (long));
581 New (0, stack->sptr, 16384, long);
582 }
583 }
584 else
585 stack->sptr = 0;
586
587 ctx->stack = stack;
588}
589
590static void
591deallocate_stack (Coro__State ctx)
592{
593 coro_stack *stack = ctx->stack;
594
595 ctx->stack = 0;
596
597 if (stack)
598 {
599 if (!--stack->refcnt)
600 {
601#ifdef HAVE_MMAP
602 if (stack->ssize > 0 && stack->sptr)
603 munmap (stack->sptr, stack->ssize);
604 else
605#endif
606 Safefree (stack->sptr);
607
608 Safefree (stack);
609 }
610 else if (ctx->gencnt == stack->gencnt)
611 --stack->usecnt;
612 }
613}
614
615static void
616setup_coro (void *arg)
617{ 840{
618 /* 841 /*
619 * emulate part of the perl startup here. 842 * emulate part of the perl startup here.
620 */ 843 */
621 dSP;
622 Coro__State ctx = (Coro__State)arg;
623 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
624
625 coro_init_stacks (aTHX); 844 coro_init_stacks (aTHX);
626 /*PL_curcop = 0;*/ 845
627 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 846 PL_runops = RUNOPS_DEFAULT;
847 PL_curcop = &PL_compiling;
848 PL_in_eval = EVAL_NULL;
849 PL_comppad = 0;
850 PL_curpm = 0;
851 PL_curpad = 0;
852 PL_localizing = 0;
853 PL_dirty = 0;
854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862
863 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
867 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
869
870 {
871 dSP;
872 UNOP myop;
873
874 Zero (&myop, 1, UNOP);
875 myop.op_next = Nullop;
876 myop.op_flags = OPf_WANT_VOID;
877
878 PUSHMARK (SP);
879 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
880 PUTBACK;
881 PL_op = (OP *)&myop;
882 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
883 SPAGAIN;
884 }
885
886 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
888 * so we have to emulate entering pp_set_stacklevel here.
889 */
890 SSL_HEAD;
891}
892
893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
628 SvREFCNT_dec (GvAV (PL_defgv)); 914 SvREFCNT_dec (GvAV (PL_defgv));
629 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
630 919
631 SPAGAIN; 920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (coro->throw);
632 925
633 if (ctx->stack) 926 coro_destruct_stacks (aTHX);
634 { 927}
635 ctx->cursp = 0;
636 928
637 PUSHMARK(SP); 929INLINE void
638 PUTBACK; 930free_coro_mortal (pTHX)
639 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 931{
640 932 if (expect_true (coro_mortal))
641 if (SvTRUE (ERRSV))
642 croak (NULL);
643 else
644 croak ("FATAL: CCTXT coroutine returned!");
645 } 933 {
646 else 934 SvREFCNT_dec (coro_mortal);
935 coro_mortal = 0;
647 { 936 }
648 UNOP myop; 937}
649 938
650 PL_op = (OP *)&myop; 939static int
940runops_trace (pTHX)
941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
651 946
652 Zero(&myop, 1, UNOP); 947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
653 myop.op_next = Nullop;
654 myop.op_flags = OPf_WANT_VOID;
655
656 PUSHMARK(SP);
657 XPUSHs (sub_init);
658 /*
659 * the next line is slightly wrong, as PL_op->op_next
660 * is actually being executed so we skip the first op.
661 * that doesn't matter, though, since it is only
662 * pp_nextstate and we never return...
663 * ah yes, and I don't care anyways ;)
664 */
665 PUTBACK;
666 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
667 SPAGAIN;
668
669 ENTER; /* necessary e.g. for dounwind */
670 } 948 {
671} 949 PERL_ASYNC_CHECK ();
672 950
673static void 951 if (cctx->flags & CC_TRACE_ALL)
674continue_coro (void *arg)
675{
676 /*
677 * this is a _very_ stripped down perl interpreter ;)
678 */
679 Coro__State ctx = (Coro__State)arg;
680 JMPENV coro_start_env;
681
682 PL_top_env = &ctx->start_env;
683
684 ctx->cursp = 0;
685 PL_op = PL_op->op_next;
686 CALLRUNOPS(aTHX);
687
688 abort ();
689}
690
691STATIC void
692transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
693{
694 dSTACKLEVEL;
695 static struct coro *xnext;
696
697 if (prev != next)
698 {
699 xnext = next;
700
701 if (next->mainstack)
702 { 952 {
703 SAVE (prev, flags); 953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
704 LOAD (next);
705
706 /* mark this state as in-use */
707 next->mainstack = 0;
708 next->tmps_ix = -2;
709
710 /* stacklevel changed? if yes, grab the stack for us! */
711 if (flags & TRANSFER_SAVE_CCTXT)
712 { 954 {
713 if (!prev->stack) 955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
714 allocate_stack (prev, 0); 956 SV **bot, **top;
715 else if (prev->cursp != stacklevel 957 AV *av = newAV (); /* return values */
716 && prev->stack->usecnt > 1) 958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
717 { 997 {
718 prev->gencnt = ++prev->stack->gencnt; 998 SV **cb;
719 prev->stack->usecnt = 1;
720 }
721 999
722 /* has our stack been invalidated? */ 1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
723 if (next->stack && next->stack->gencnt != next->gencnt)
724 { 1001 {
725 deallocate_stack (next); 1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
726 allocate_stack (next, 1); 1003
727 coro_create (&(next->stack->cctx), 1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
728 continue_coro, (void *)next, 1005 {
729 next->stack->sptr, labs (next->stack->ssize)); 1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
730 } 1032 }
731 1033
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1034 if (cctx->flags & CC_TRACE_LINE)
733 /* don't add any code here */
734 }
735
736 }
737 else if (next->tmps_ix == -2)
738 croak ("tried to transfer to running coroutine");
739 else
740 {
741 SAVE (prev, -1); /* first get rid of the old state */
742
743 if (flags & TRANSFER_SAVE_CCTXT)
744 {
745 if (!prev->stack)
746 allocate_stack (prev, 0);
747
748 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
749 { 1035 {
750 PL_top_env = &next->start_env; 1036 dSP;
751 1037
752 setup_coro (next); 1038 PL_runops = RUNOPS_DEFAULT;
753 1039 ENTER;
754 prev->stack->refcnt++; 1040 SAVETMPS;
755 prev->stack->usecnt++; 1041 EXTEND (SP, 3);
756 next->stack = prev->stack; 1042 PL_runops = RUNOPS_DEFAULT;
757 next->gencnt = prev->gencnt; 1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
758 } 1053 }
759 else
760 {
761 assert (!next->stack);
762 allocate_stack (next, 1);
763 coro_create (&(next->stack->cctx),
764 setup_coro, (void *)next,
765 next->stack->sptr, labs (next->stack->ssize));
766 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
767 /* don't add any code here */
768 } 1054 }
769 } 1055 }
770 else
771 setup_coro (next);
772 } 1056 }
773
774 /*
775 * xnext is now either prev or next, depending on wether
776 * we switched the c stack or not. that's why I use a global
777 * variable, that should become thread-specific at one point.
778 */
779 xnext->cursp = stacklevel;
780 }
781
782 if (coro_mortal)
783 { 1057 }
784 SvREFCNT_dec (coro_mortal);
785 coro_mortal = 0;
786 }
787}
788 1058
789#define SV_CORO(sv,func) \ 1059 TAINT_NOT;
790 do { \ 1060 return 0;
791 if (SvROK (sv)) \ 1061}
792 sv = SvRV (sv); \
793 \
794 if (SvTYPE(sv) == SVt_PVHV) \
795 { \
796 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
797 \
798 if (!he) \
799 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
800 \
801 (sv) = SvRV (HeVAL(he)); \
802 } \
803 \
804 /* must also be changed inside Coro::Cont::yield */ \
805 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
806 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
807 \
808 } while(0)
809
810#define SvSTATE(sv) (struct coro *)SvIV (sv)
811 1062
812static void 1063static void
1064prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1065{
1066 ta->prev = (struct coro *)cctx;
1067 ta->next = 0;
1068}
1069
1070/* inject a fake call to Coro::State::_cctx_init into the execution */
1071/* _cctx_init should be careful, as it could be called at almost any time */
1072/* during execution of a perl program */
1073/* also initialises PL_top_env */
1074static void NOINLINE
1075cctx_prepare (pTHX_ coro_cctx *cctx)
1076{
1077 dSP;
1078 UNOP myop;
1079
1080 PL_top_env = &PL_start_env;
1081
1082 if (cctx->flags & CC_TRACE)
1083 PL_runops = runops_trace;
1084
1085 Zero (&myop, 1, UNOP);
1086 myop.op_next = PL_op;
1087 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1088
1089 PUSHMARK (SP);
1090 EXTEND (SP, 2);
1091 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1092 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1093 PUTBACK;
1094 PL_op = (OP *)&myop;
1095 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1096 SPAGAIN;
1097}
1098
1099/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void
1101transfer_tail (pTHX)
1102{
1103 struct coro *next = (struct coro *)transfer_next;
1104 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1105 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1106
1107 free_coro_mortal (aTHX);
1108 UNLOCK;
1109
1110 if (expect_false (next->throw))
1111 {
1112 SV *exception = sv_2mortal (next->throw);
1113
1114 next->throw = 0;
1115 sv_setsv (ERRSV, exception);
1116 croak (0);
1117 }
1118}
1119
1120/*
1121 * this is a _very_ stripped down perl interpreter ;)
1122 */
1123static void
1124cctx_run (void *arg)
1125{
1126#ifdef USE_ITHREADS
1127# if CORO_PTHREAD
1128 PERL_SET_CONTEXT (coro_thx);
1129# endif
1130#endif
1131 {
1132 dTHX;
1133
1134 /* we are the alternative tail to pp_set_stacklevel */
1135 /* so do the same things here */
1136 SSL_TAIL;
1137
1138 /* we now skip the op that did lead to transfer() */
1139 PL_op = PL_op->op_next;
1140
1141 /* inject a fake subroutine call to cctx_init */
1142 cctx_prepare (aTHX_ (coro_cctx *)arg);
1143
1144 /* cctx_run is the alternative tail of transfer() */
1145 transfer_tail (aTHX);
1146
1147 /* somebody or something will hit me for both perl_run and PL_restartop */
1148 PL_restartop = PL_op;
1149 perl_run (PL_curinterp);
1150
1151 /*
1152 * If perl-run returns we assume exit() was being called or the coro
1153 * fell off the end, which seems to be the only valid (non-bug)
1154 * reason for perl_run to return. We try to exit by jumping to the
1155 * bootstrap-time "top" top_env, as we cannot restore the "main"
1156 * coroutine as Coro has no such concept
1157 */
1158 PL_top_env = main_top_env;
1159 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1160 }
1161}
1162
1163static coro_cctx *
1164cctx_new ()
1165{
1166 coro_cctx *cctx;
1167
1168 ++cctx_count;
1169 New (0, cctx, 1, coro_cctx);
1170
1171 cctx->gen = cctx_gen;
1172 cctx->flags = 0;
1173 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx only suitable as source */
1179static coro_cctx *
1180cctx_new_empty ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183
1184 cctx->sptr = 0;
1185 coro_create (&cctx->cctx, 0, 0, 0, 0);
1186
1187 return cctx;
1188}
1189
1190/* create a new cctx suitable as destination/running a perl interpreter */
1191static coro_cctx *
1192cctx_new_run ()
1193{
1194 coro_cctx *cctx = cctx_new ();
1195 void *stack_start;
1196 size_t stack_size;
1197
1198#if HAVE_MMAP
1199 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1200 /* mmap supposedly does allocate-on-write for us */
1201 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1202
1203 if (cctx->sptr != (void *)-1)
1204 {
1205 #if CORO_STACKGUARD
1206 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1207 #endif
1208 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1209 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1210 cctx->flags |= CC_MAPPED;
1211 }
1212 else
1213#endif
1214 {
1215 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1216 New (0, cctx->sptr, cctx_stacksize, long);
1217
1218 if (!cctx->sptr)
1219 {
1220 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1221 _exit (EXIT_FAILURE);
1222 }
1223
1224 stack_start = cctx->sptr;
1225 stack_size = cctx->ssize;
1226 }
1227
1228 #if CORO_USE_VALGRIND
1229 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1230 #endif
1231
1232 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1233
1234 return cctx;
1235}
1236
1237static void
1238cctx_destroy (coro_cctx *cctx)
1239{
1240 if (!cctx)
1241 return;
1242
1243 --cctx_count;
1244 coro_destroy (&cctx->cctx);
1245
1246 /* coro_transfer creates new, empty cctx's */
1247 if (cctx->sptr)
1248 {
1249 #if CORO_USE_VALGRIND
1250 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1251 #endif
1252
1253#if HAVE_MMAP
1254 if (cctx->flags & CC_MAPPED)
1255 munmap (cctx->sptr, cctx->ssize);
1256 else
1257#endif
1258 Safefree (cctx->sptr);
1259 }
1260
1261 Safefree (cctx);
1262}
1263
1264/* wether this cctx should be destructed */
1265#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1266
1267static coro_cctx *
1268cctx_get (pTHX)
1269{
1270 while (expect_true (cctx_first))
1271 {
1272 coro_cctx *cctx = cctx_first;
1273 cctx_first = cctx->next;
1274 --cctx_idle;
1275
1276 if (expect_true (!CCTX_EXPIRED (cctx)))
1277 return cctx;
1278
1279 cctx_destroy (cctx);
1280 }
1281
1282 return cctx_new_run ();
1283}
1284
1285static void
1286cctx_put (coro_cctx *cctx)
1287{
1288 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1289
1290 /* free another cctx if overlimit */
1291 if (expect_false (cctx_idle >= cctx_max_idle))
1292 {
1293 coro_cctx *first = cctx_first;
1294 cctx_first = first->next;
1295 --cctx_idle;
1296
1297 cctx_destroy (first);
1298 }
1299
1300 ++cctx_idle;
1301 cctx->next = cctx_first;
1302 cctx_first = cctx;
1303}
1304
1305/** coroutine switching *****************************************************/
1306
1307static void
1308transfer_check (pTHX_ struct coro *prev, struct coro *next)
1309{
1310 if (expect_true (prev != next))
1311 {
1312 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1313 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1314
1315 if (expect_false (next->flags & CF_RUNNING))
1316 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1317
1318 if (expect_false (next->flags & CF_DESTROYED))
1319 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1320
1321#if !PERL_VERSION_ATLEAST (5,10,0)
1322 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1324#endif
1325 }
1326}
1327
1328/* always use the TRANSFER macro */
1329static void NOINLINE
1330transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1331{
1332 dSTACKLEVEL;
1333
1334 /* sometimes transfer is only called to set idle_sp */
1335 if (expect_false (!next))
1336 {
1337 ((coro_cctx *)prev)->idle_sp = stacklevel;
1338 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1339 }
1340 else if (expect_true (prev != next))
1341 {
1342 coro_cctx *prev__cctx;
1343
1344 if (expect_false (prev->flags & CF_NEW))
1345 {
1346 /* create a new empty/source context */
1347 prev->cctx = cctx_new_empty ();
1348 prev->flags &= ~CF_NEW;
1349 prev->flags |= CF_RUNNING;
1350 }
1351
1352 prev->flags &= ~CF_RUNNING;
1353 next->flags |= CF_RUNNING;
1354
1355 LOCK;
1356
1357 /* first get rid of the old state */
1358 save_perl (aTHX_ prev);
1359
1360 if (expect_false (next->flags & CF_NEW))
1361 {
1362 /* need to start coroutine */
1363 next->flags &= ~CF_NEW;
1364 /* setup coroutine call */
1365 coro_setup (aTHX_ next);
1366 }
1367 else
1368 load_perl (aTHX_ next);
1369
1370 prev__cctx = prev->cctx;
1371
1372 /* possibly untie and reuse the cctx */
1373 if (expect_true (
1374 prev__cctx->idle_sp == stacklevel
1375 && !(prev__cctx->flags & CC_TRACE)
1376 && !force_cctx
1377 ))
1378 {
1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1381
1382 prev->cctx = 0;
1383
1384 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1385 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1386 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1387 if (!next->cctx)
1388 next->cctx = cctx_get (aTHX);
1389
1390 cctx_put (prev__cctx);
1391 }
1392
1393 ++next->usecount;
1394
1395 if (expect_true (!next->cctx))
1396 next->cctx = cctx_get (aTHX);
1397
1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1399 transfer_next = next;
1400
1401 if (expect_false (prev__cctx != next->cctx))
1402 {
1403 prev__cctx->top_env = PL_top_env;
1404 PL_top_env = next->cctx->top_env;
1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1406 }
1407
1408 transfer_tail (aTHX);
1409 }
1410}
1411
1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1414
1415/** high level stuff ********************************************************/
1416
1417static int
1418coro_state_destroy (pTHX_ struct coro *coro)
1419{
1420 if (coro->flags & CF_DESTROYED)
1421 return 0;
1422
1423 coro->flags |= CF_DESTROYED;
1424
1425 if (coro->flags & CF_READY)
1426 {
1427 /* reduce nready, as destroying a ready coro effectively unreadies it */
1428 /* alternative: look through all ready queues and remove the coro */
1429 LOCK;
1430 --coro_nready;
1431 UNLOCK;
1432 }
1433 else
1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1435
1436 if (coro->mainstack && coro->mainstack != main_mainstack)
1437 {
1438 struct coro temp;
1439
1440 if (coro->flags & CF_RUNNING)
1441 croak ("FATAL: tried to destroy currently running coroutine");
1442
1443 save_perl (aTHX_ &temp);
1444 load_perl (aTHX_ coro);
1445
1446 coro_destruct (aTHX_ coro);
1447
1448 load_perl (aTHX_ &temp);
1449
1450 coro->slot = 0;
1451 }
1452
1453 cctx_destroy (coro->cctx);
1454 SvREFCNT_dec (coro->args);
1455
1456 if (coro->next) coro->next->prev = coro->prev;
1457 if (coro->prev) coro->prev->next = coro->next;
1458 if (coro == coro_first) coro_first = coro->next;
1459
1460 return 1;
1461}
1462
1463static int
1464coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1465{
1466 struct coro *coro = (struct coro *)mg->mg_ptr;
1467 mg->mg_ptr = 0;
1468
1469 coro->hv = 0;
1470
1471 if (--coro->refcnt < 0)
1472 {
1473 coro_state_destroy (aTHX_ coro);
1474 Safefree (coro);
1475 }
1476
1477 return 0;
1478}
1479
1480static int
1481coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1482{
1483 struct coro *coro = (struct coro *)mg->mg_ptr;
1484
1485 ++coro->refcnt;
1486
1487 return 0;
1488}
1489
1490static MGVTBL coro_state_vtbl = {
1491 0, 0, 0, 0,
1492 coro_state_free,
1493 0,
1494#ifdef MGf_DUP
1495 coro_state_dup,
1496#else
1497# define MGf_DUP 0
1498#endif
1499};
1500
1501static void
1502prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1503{
1504 ta->prev = SvSTATE (prev_sv);
1505 ta->next = SvSTATE (next_sv);
1506 TRANSFER_CHECK (*ta);
1507}
1508
1509static void
813api_transfer(pTHX_ SV *prev, SV *next, int flags) 1510api_transfer (SV *prev_sv, SV *next_sv)
814{ 1511{
815 SV_CORO (prev, "Coro::transfer"); 1512 dTHX;
816 SV_CORO (next, "Coro::transfer"); 1513 struct transfer_args ta;
817 1514
818 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags); 1515 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1516 TRANSFER (ta, 1);
819} 1517}
820 1518
821/** Coro ********************************************************************/ 1519/** Coro ********************************************************************/
822 1520
823#define PRIO_MAX 3
824#define PRIO_HIGH 1
825#define PRIO_NORMAL 0
826#define PRIO_LOW -1
827#define PRIO_IDLE -3
828#define PRIO_MIN -4
829
830/* for Coro.pm */
831static GV *coro_current, *coro_idle;
832static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
833static int coro_nready;
834
835static void 1521static void
836coro_enq (SV *sv) 1522coro_enq (pTHX_ SV *coro_sv)
837{ 1523{
838 if (SvTYPE (sv) == SVt_PVHV)
839 {
840 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
841 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
842
843 prio = prio > PRIO_MAX ? PRIO_MAX
844 : prio < PRIO_MIN ? PRIO_MIN
845 : prio;
846
847 av_push (coro_ready [prio - PRIO_MIN], sv); 1524 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
848 coro_nready++;
849
850 return;
851 }
852
853 croak ("Coro::ready tried to enqueue something that is not a coroutine");
854} 1525}
855 1526
856static SV * 1527static SV *
857coro_deq (int min_prio) 1528coro_deq (pTHX)
858{ 1529{
859 int prio = PRIO_MAX - PRIO_MIN; 1530 int prio;
860 1531
861 min_prio -= PRIO_MIN;
862 if (min_prio < 0)
863 min_prio = 0;
864
865 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1532 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
866 if (av_len (coro_ready[prio]) >= 0) 1533 if (AvFILLp (coro_ready [prio]) >= 0)
867 {
868 coro_nready--;
869 return av_shift (coro_ready[prio]); 1534 return av_shift (coro_ready [prio]);
870 }
871 1535
872 return 0; 1536 return 0;
873} 1537}
874 1538
1539static int
1540api_ready (SV *coro_sv)
1541{
1542 dTHX;
1543 struct coro *coro;
1544 SV *sv_hook;
1545 void (*xs_hook)(void);
1546
1547 if (SvROK (coro_sv))
1548 coro_sv = SvRV (coro_sv);
1549
1550 coro = SvSTATE (coro_sv);
1551
1552 if (coro->flags & CF_READY)
1553 return 0;
1554
1555 coro->flags |= CF_READY;
1556
1557 LOCK;
1558
1559 sv_hook = coro_nready ? 0 : coro_readyhook;
1560 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1561
1562 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1563 ++coro_nready;
1564
1565 UNLOCK;
1566
1567 if (sv_hook)
1568 {
1569 dSP;
1570
1571 ENTER;
1572 SAVETMPS;
1573
1574 PUSHMARK (SP);
1575 PUTBACK;
1576 call_sv (sv_hook, G_DISCARD);
1577 SPAGAIN;
1578
1579 FREETMPS;
1580 LEAVE;
1581 }
1582
1583 if (xs_hook)
1584 xs_hook ();
1585
1586 return 1;
1587}
1588
1589static int
1590api_is_ready (SV *coro_sv)
1591{
1592 dTHX;
1593
1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1595}
1596
1597INLINE void
1598prepare_schedule (pTHX_ struct transfer_args *ta)
1599{
1600 SV *prev_sv, *next_sv;
1601
1602 for (;;)
1603 {
1604 LOCK;
1605 next_sv = coro_deq (aTHX);
1606
1607 /* nothing to schedule: call the idle handler */
1608 if (expect_false (!next_sv))
1609 {
1610 dSP;
1611 UNLOCK;
1612
1613 ENTER;
1614 SAVETMPS;
1615
1616 PUSHMARK (SP);
1617 PUTBACK;
1618 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1619 SPAGAIN;
1620
1621 FREETMPS;
1622 LEAVE;
1623 continue;
1624 }
1625
1626 ta->next = SvSTATE (next_sv);
1627
1628 /* cannot transfer to destroyed coros, skip and look for next */
1629 if (expect_false (ta->next->flags & CF_DESTROYED))
1630 {
1631 UNLOCK;
1632 SvREFCNT_dec (next_sv);
1633 /* coro_nready has already been taken care of by destroy */
1634 continue;
1635 }
1636
1637 --coro_nready;
1638 UNLOCK;
1639 break;
1640 }
1641
1642 /* free this only after the transfer */
1643 prev_sv = SvRV (coro_current);
1644 ta->prev = SvSTATE (prev_sv);
1645 TRANSFER_CHECK (*ta);
1646 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1647 ta->next->flags &= ~CF_READY;
1648 SvRV_set (coro_current, next_sv);
1649
1650 LOCK;
1651 free_coro_mortal (aTHX);
1652 coro_mortal = prev_sv;
1653 UNLOCK;
1654}
1655
1656INLINE void
1657prepare_cede (pTHX_ struct transfer_args *ta)
1658{
1659 api_ready (coro_current);
1660 prepare_schedule (aTHX_ ta);
1661}
1662
875static void 1663static void
876api_ready (SV *coro) 1664prepare_cede_notself (pTHX_ struct transfer_args *ta)
877{ 1665{
878 if (SvROK (coro)) 1666 SV *prev = SvRV (coro_current);
879 coro = SvRV (coro);
880 1667
881 coro_enq (SvREFCNT_inc (coro)); 1668 if (coro_nready)
1669 {
1670 prepare_schedule (aTHX_ ta);
1671 api_ready (prev);
1672 }
1673 else
1674 ta->prev = ta->next = SvSTATE (prev);
882} 1675}
883 1676
884static void 1677static void
885api_schedule (void) 1678api_schedule (void)
886{ 1679{
887 SV *prev, *next; 1680 dTHX;
1681 struct transfer_args ta;
888 1682
889 prev = SvRV (GvSV (coro_current)); 1683 prepare_schedule (aTHX_ &ta);
890 next = coro_deq (PRIO_MIN); 1684 TRANSFER (ta, 1);
1685}
891 1686
892 if (!next) 1687static int
893 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1688api_cede (void)
1689{
1690 dTHX;
1691 struct transfer_args ta;
894 1692
895 /* free this only after the transfer */ 1693 prepare_cede (aTHX_ &ta);
896 coro_mortal = prev;
897 SV_CORO (prev, "Coro::schedule");
898 1694
899 SvRV (GvSV (coro_current)) = next; 1695 if (expect_true (ta.prev != ta.next))
1696 {
1697 TRANSFER (ta, 1);
1698 return 1;
1699 }
1700 else
1701 return 0;
1702}
900 1703
901 SV_CORO (next, "Coro::schedule"); 1704static int
1705api_cede_notself (void)
1706{
1707 if (coro_nready)
1708 {
1709 dTHX;
1710 struct transfer_args ta;
902 1711
903 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1712 prepare_cede_notself (aTHX_ &ta);
904 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1713 TRANSFER (ta, 1);
1714 return 1;
1715 }
1716 else
1717 return 0;
905} 1718}
906 1719
907static void 1720static void
908api_cede (void) 1721api_trace (SV *coro_sv, int flags)
909{ 1722{
910 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1723 dTHX;
1724 struct coro *coro = SvSTATE (coro_sv);
911 1725
1726 if (flags & CC_TRACE)
1727 {
1728 if (!coro->cctx)
1729 coro->cctx = cctx_new_run ();
1730 else if (!(coro->cctx->flags & CC_TRACE))
1731 croak ("cannot enable tracing on coroutine with custom stack");
1732
1733 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1734 }
1735 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1736 {
1737 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1738
1739 if (coro->flags & CF_RUNNING)
1740 PL_runops = RUNOPS_DEFAULT;
1741 else
1742 coro->slot->runops = RUNOPS_DEFAULT;
1743 }
1744}
1745
1746#if 0
1747static int
1748coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1749{
1750 AV *padlist;
1751 AV *av = (AV *)mg->mg_obj;
1752
1753 abort ();
1754
1755 return 0;
1756}
1757
1758static MGVTBL coro_gensub_vtbl = {
1759 0, 0, 0, 0,
1760 coro_gensub_free
1761};
1762#endif
1763
1764/*****************************************************************************/
1765/* PerlIO::cede */
1766
1767typedef struct
1768{
1769 PerlIOBuf base;
1770 NV next, every;
1771} PerlIOCede;
1772
1773static IV
1774PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1775{
1776 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1777
1778 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1779 self->next = nvtime () + self->every;
1780
1781 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1782}
1783
1784static SV *
1785PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1786{
1787 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1788
1789 return newSVnv (self->every);
1790}
1791
1792static IV
1793PerlIOCede_flush (pTHX_ PerlIO *f)
1794{
1795 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1796 double now = nvtime ();
1797
1798 if (now >= self->next)
1799 {
912 api_schedule (); 1800 api_cede ();
913} 1801 self->next = now + self->every;
1802 }
914 1803
1804 return PerlIOBuf_flush (aTHX_ f);
1805}
1806
1807static PerlIO_funcs PerlIO_cede =
1808{
1809 sizeof(PerlIO_funcs),
1810 "cede",
1811 sizeof(PerlIOCede),
1812 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1813 PerlIOCede_pushed,
1814 PerlIOBuf_popped,
1815 PerlIOBuf_open,
1816 PerlIOBase_binmode,
1817 PerlIOCede_getarg,
1818 PerlIOBase_fileno,
1819 PerlIOBuf_dup,
1820 PerlIOBuf_read,
1821 PerlIOBuf_unread,
1822 PerlIOBuf_write,
1823 PerlIOBuf_seek,
1824 PerlIOBuf_tell,
1825 PerlIOBuf_close,
1826 PerlIOCede_flush,
1827 PerlIOBuf_fill,
1828 PerlIOBase_eof,
1829 PerlIOBase_error,
1830 PerlIOBase_clearerr,
1831 PerlIOBase_setlinebuf,
1832 PerlIOBuf_get_base,
1833 PerlIOBuf_bufsiz,
1834 PerlIOBuf_get_ptr,
1835 PerlIOBuf_get_cnt,
1836 PerlIOBuf_set_ptrcnt,
1837};
1838
1839/*****************************************************************************/
1840
1841static const CV *ssl_cv; /* for quick consistency check */
1842
1843static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1844static SV *ssl_arg0;
1845static SV *ssl_arg1;
1846
1847/* this restores the stack in the case we patched the entersub, to */
1848/* recreate the stack frame as perl will on following calls */
1849/* since entersub cleared the stack */
1850static OP *
1851pp_restore (pTHX)
1852{
1853 dSP;
1854
1855 PUSHMARK (SP);
1856
1857 EXTEND (SP, 3);
1858 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;
1859 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1860 PUSHs ((SV *)CvGV (ssl_cv));
1861
1862 RETURNOP (ssl_restore.op_first);
1863}
1864
1865#define OPpENTERSUB_SSL 15 /* the part of op_private entersub hopefully doesn't use */
1866
1867/* declare prototype */
1868XS(XS_Coro__State__set_stacklevel);
1869
1870/*
1871 * these not obviously related functions are all rolled into one
1872 * function to increase chances that they all will call transfer with the same
1873 * stack offset
1874 */
1875static OP *
1876pp_set_stacklevel (pTHX)
1877{
1878 dSP;
1879 struct transfer_args ta;
1880 SV **arg = PL_stack_base + TOPMARK + 1;
1881 int items = SP - arg; /* args without function object */
1882
1883 /* do a quick consistency check on the "function" object, and if it isn't */
1884 /* for us, divert to the real entersub */
1885 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1886 return PL_ppaddr[OP_ENTERSUB](aTHX);
1887
1888 /* pop args */
1889 SP = PL_stack_base + POPMARK;
1890
1891 if (!(PL_op->op_flags & OPf_STACKED))
1892 {
1893 /* ampersand-form of call, use @_ instead of stack */
1894 AV *av = GvAV (PL_defgv);
1895 arg = AvARRAY (av);
1896 items = AvFILLp (av) + 1;
1897 }
1898
1899 PUTBACK;
1900 switch (PL_op->op_private & OPpENTERSUB_SSL)
1901 {
1902 case 0:
1903 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1904 break;
1905
1906 case 1:
1907 if (items != 2)
1908 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1909
1910 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1911 break;
1912
1913 case 2:
1914 prepare_schedule (aTHX_ &ta);
1915 break;
1916
1917 case 3:
1918 prepare_cede (aTHX_ &ta);
1919 break;
1920
1921 case 4:
1922 prepare_cede_notself (aTHX_ &ta);
1923 break;
1924 }
1925
1926 TRANSFER (ta, 0);
1927 SPAGAIN;
1928
1929skip:
1930 PUTBACK;
1931 SSL_TAIL;
1932 SPAGAIN;
1933 RETURN;
1934}
1935
1936static void
1937coro_ssl_patch (pTHX_ CV *cv, int ix, SV **args, int items)
1938{
1939 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1940
1941 assert (("FATAL: ssl call with illegal CV value", CvGV (cv)));
1942 ssl_cv = cv;
1943
1944 /* we patch the op, and then re-run the whole call */
1945 /* we have to put some dummy argument on the stack for this to work */
1946 ssl_restore.op_next = (OP *)&ssl_restore;
1947 ssl_restore.op_type = OP_NULL;
1948 ssl_restore.op_ppaddr = pp_restore;
1949 ssl_restore.op_first = PL_op;
1950
1951 ssl_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1952 ssl_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1953
1954 PL_op->op_ppaddr = pp_set_stacklevel;
1955 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SSL | ix; /* we potentially share our private flags with entersub */
1956
1957 PL_op = (OP *)&ssl_restore;
1958}
1959
915MODULE = Coro::State PACKAGE = Coro::State 1960MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916 1961
917PROTOTYPES: ENABLE 1962PROTOTYPES: DISABLE
918 1963
919BOOT: 1964BOOT:
920{ /* {} necessary for stoopid perl-5.6.x */ 1965{
921 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1966#ifdef USE_ITHREADS
922 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1967 MUTEX_INIT (&coro_lock);
1968# if CORO_PTHREAD
1969 coro_thx = PERL_GET_CONTEXT;
1970# endif
1971#endif
1972 BOOT_PAGESIZE;
1973
1974 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1975 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1976
1977 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1978 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1979 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1980
1981 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1982 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1983 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1984
923 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1985 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
924 1986
925 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1987 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
926 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1988 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
927 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1989 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
928 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1990 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
929
930 if (!padlist_cache)
931 padlist_cache = newHV ();
932 1991
933 main_mainstack = PL_mainstack; 1992 main_mainstack = PL_mainstack;
1993 main_top_env = PL_top_env;
934 1994
1995 while (main_top_env->je_prev)
1996 main_top_env = main_top_env->je_prev;
1997
935 coroapi.ver = CORO_API_VERSION; 1998 coroapi.ver = CORO_API_VERSION;
1999 coroapi.rev = CORO_API_REVISION;
936 coroapi.transfer = api_transfer; 2000 coroapi.transfer = api_transfer;
937}
938 2001
939Coro::State 2002 {
940_newprocess(args) 2003 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
941 SV * args 2004
942 PROTOTYPE: $ 2005 if (!svp) croak ("Time::HiRes is required");
2006 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2007
2008 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2009 }
2010
2011 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2012}
2013
2014SV *
2015new (char *klass, ...)
943 CODE: 2016 CODE:
944 Coro__State coro; 2017{
2018 struct coro *coro;
2019 MAGIC *mg;
2020 HV *hv;
2021 int i;
945 2022
946 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
947 croak ("Coro::State::_newprocess expects an arrayref");
948
949 Newz (0, coro, 1, struct coro); 2023 Newz (0, coro, 1, struct coro);
2024 coro->args = newAV ();
2025 coro->flags = CF_NEW;
950 2026
951 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2027 if (coro_first) coro_first->prev = coro;
952 coro->mainstack = 0; /* actual work is done inside transfer */ 2028 coro->next = coro_first;
953 coro->stack = 0; 2029 coro_first = coro;
954 2030
955 /* same as JMPENV_BOOTSTRAP */ 2031 coro->hv = hv = newHV ();
956 /* we might be able to recycle start_env, but safe is safe */ 2032 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
957 //Zero(&coro->start_env, 1, JMPENV); 2033 mg->mg_flags |= MGf_DUP;
958 coro->start_env.je_ret = -1; 2034 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
959 coro->start_env.je_mustcatch = TRUE;
960 2035
961 RETVAL = coro; 2036 av_extend (coro->args, items - 1);
2037 for (i = 1; i < items; i++)
2038 av_push (coro->args, newSVsv (ST (i)));
2039}
962 OUTPUT: 2040 OUTPUT:
963 RETVAL 2041 RETVAL
964 2042
965void 2043void
966transfer(prev, next, flags) 2044_set_stacklevel (...)
967 SV *prev 2045 ALIAS:
968 SV *next 2046 Coro::State::transfer = 1
969 int flags 2047 Coro::schedule = 2
970 PROTOTYPE: @ 2048 Coro::cede = 3
2049 Coro::cede_notself = 4
971 CODE: 2050 CODE:
972 PUTBACK; 2051 coro_ssl_patch (aTHX_ cv, ix, &ST (0), items);
973 SV_CORO (next, "Coro::transfer"); 2052
974 SV_CORO (prev, "Coro::transfer"); 2053bool
975 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2054_destroy (SV *coro_sv)
976 SPAGAIN; 2055 CODE:
2056 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2057 OUTPUT:
2058 RETVAL
977 2059
978void 2060void
979DESTROY(coro)
980 Coro::State coro
981 CODE:
982
983 if (coro->mainstack && coro->mainstack != main_mainstack)
984 {
985 struct coro temp;
986
987 PUTBACK;
988 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
989 LOAD(aTHX_ coro);
990 SPAGAIN;
991
992 destroy_stacks (aTHX);
993
994 LOAD((&temp)); /* this will get rid of defsv etc.. */
995 SPAGAIN;
996
997 coro->mainstack = 0;
998 }
999
1000 deallocate_stack (coro);
1001 SvREFCNT_dec (coro->args);
1002 Safefree (coro);
1003
1004void
1005_exit(code) 2061_exit (int code)
1006 int code
1007 PROTOTYPE: $ 2062 PROTOTYPE: $
1008 CODE: 2063 CODE:
1009 _exit (code); 2064 _exit (code);
1010 2065
1011MODULE = Coro::State PACKAGE = Coro::Cont 2066int
2067cctx_stacksize (int new_stacksize = 0)
2068 CODE:
2069 RETVAL = cctx_stacksize;
2070 if (new_stacksize)
2071 {
2072 cctx_stacksize = new_stacksize;
2073 ++cctx_gen;
2074 }
2075 OUTPUT:
2076 RETVAL
1012 2077
1013# this is slightly dirty (should expose a c-level api) 2078int
2079cctx_max_idle (int max_idle = 0)
2080 CODE:
2081 RETVAL = cctx_max_idle;
2082 if (max_idle > 1)
2083 cctx_max_idle = max_idle;
2084 OUTPUT:
2085 RETVAL
2086
2087int
2088cctx_count ()
2089 CODE:
2090 RETVAL = cctx_count;
2091 OUTPUT:
2092 RETVAL
2093
2094int
2095cctx_idle ()
2096 CODE:
2097 RETVAL = cctx_idle;
2098 OUTPUT:
2099 RETVAL
1014 2100
1015void 2101void
1016yield(...) 2102list ()
2103 PPCODE:
2104{
2105 struct coro *coro;
2106 for (coro = coro_first; coro; coro = coro->next)
2107 if (coro->hv)
2108 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2109}
2110
2111void
2112call (Coro::State coro, SV *coderef)
2113 ALIAS:
2114 eval = 1
2115 CODE:
2116{
2117 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2118 {
2119 struct coro temp;
2120
2121 if (!(coro->flags & CF_RUNNING))
2122 {
2123 PUTBACK;
2124 save_perl (aTHX_ &temp);
2125 load_perl (aTHX_ coro);
2126 }
2127
2128 {
2129 dSP;
2130 ENTER;
2131 SAVETMPS;
2132 PUTBACK;
2133 PUSHSTACK;
2134 PUSHMARK (SP);
2135
2136 if (ix)
2137 eval_sv (coderef, 0);
2138 else
2139 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2140
2141 POPSTACK;
2142 SPAGAIN;
2143 FREETMPS;
2144 LEAVE;
2145 PUTBACK;
2146 }
2147
2148 if (!(coro->flags & CF_RUNNING))
2149 {
2150 save_perl (aTHX_ coro);
2151 load_perl (aTHX_ &temp);
2152 SPAGAIN;
2153 }
2154 }
2155}
2156
2157SV *
2158is_ready (Coro::State coro)
2159 PROTOTYPE: $
2160 ALIAS:
2161 is_ready = CF_READY
2162 is_running = CF_RUNNING
2163 is_new = CF_NEW
2164 is_destroyed = CF_DESTROYED
2165 CODE:
2166 RETVAL = boolSV (coro->flags & ix);
2167 OUTPUT:
2168 RETVAL
2169
2170void
2171throw (Coro::State self, SV *throw = &PL_sv_undef)
1017 PROTOTYPE: @ 2172 PROTOTYPE: $;$
1018 CODE: 2173 CODE:
1019 static SV *returnstk;
1020 SV *sv;
1021 AV *defav = GvAV (PL_defgv);
1022 struct coro *prev, *next;
1023
1024 if (!returnstk)
1025 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1026
1027 /* set up @_ -- ugly */
1028 av_clear (defav);
1029 av_fill (defav, items - 1);
1030 while (items--)
1031 av_store (defav, items, SvREFCNT_inc (ST(items)));
1032
1033 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1034 sv = av_pop ((AV *)SvRV (returnstk));
1035 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1036 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1037 SvREFCNT_dec (sv); 2174 SvREFCNT_dec (self->throw);
2175 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1038 2176
1039 transfer(aTHX_ prev, next, 0); 2177void
2178api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2179
2180SV *
2181has_cctx (Coro::State coro)
2182 PROTOTYPE: $
2183 CODE:
2184 RETVAL = boolSV (!!coro->cctx);
2185 OUTPUT:
2186 RETVAL
2187
2188int
2189is_traced (Coro::State coro)
2190 PROTOTYPE: $
2191 CODE:
2192 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2193 OUTPUT:
2194 RETVAL
2195
2196UV
2197rss (Coro::State coro)
2198 PROTOTYPE: $
2199 ALIAS:
2200 usecount = 1
2201 CODE:
2202 switch (ix)
2203 {
2204 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2205 case 1: RETVAL = coro->usecount; break;
2206 }
2207 OUTPUT:
2208 RETVAL
2209
2210void
2211force_cctx ()
2212 CODE:
2213 struct coro *coro = SvSTATE (coro_current);
2214 coro->cctx->idle_sp = 0;
2215
2216void
2217swap_defsv (Coro::State self)
2218 PROTOTYPE: $
2219 ALIAS:
2220 swap_defav = 1
2221 CODE:
2222 if (!self->slot)
2223 croak ("cannot swap state with coroutine that has no saved state");
2224 else
2225 {
2226 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2227 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2228
2229 SV *tmp = *src; *src = *dst; *dst = tmp;
2230 }
1040 2231
1041MODULE = Coro::State PACKAGE = Coro 2232MODULE = Coro::State PACKAGE = Coro
1042 2233
1043# this is slightly dirty (should expose a c-level api)
1044
1045BOOT: 2234BOOT:
1046{ 2235{
1047 int i; 2236 int i;
2237
2238 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2239 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2240 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2241
2242 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2243 SvREADONLY_on (coro_current);
2244
1048 HV *stash = gv_stashpv ("Coro", TRUE); 2245 coro_stash = gv_stashpv ("Coro", TRUE);
1049 2246
1050 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2247 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2248 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2249 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2250 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2251 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2252 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056
1057 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059 2253
1060 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2254 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061 coro_ready[i] = newAV (); 2255 coro_ready[i] = newAV ();
1062 2256
1063 { 2257 {
1064 SV *sv = perl_get_sv("Coro::API", 1); 2258 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1065 2259
1066 coroapi.schedule = api_schedule; 2260 coroapi.schedule = api_schedule;
1067 coroapi.cede = api_cede; 2261 coroapi.cede = api_cede;
2262 coroapi.cede_notself = api_cede_notself;
1068 coroapi.ready = api_ready; 2263 coroapi.ready = api_ready;
2264 coroapi.is_ready = api_is_ready;
1069 coroapi.nready = &coro_nready; 2265 coroapi.nready = &coro_nready;
1070 coroapi.current = coro_current; 2266 coroapi.current = coro_current;
1071 2267
1072 GCoroAPI = &coroapi; 2268 GCoroAPI = &coroapi;
1073 sv_setiv(sv, (IV)&coroapi); 2269 sv_setiv (sv, (IV)&coroapi);
1074 SvREADONLY_on(sv); 2270 SvREADONLY_on (sv);
1075 } 2271 }
1076} 2272}
1077 2273
1078#if !PERL_MICRO
1079
1080void 2274void
1081ready(self) 2275_set_current (SV *current)
1082 SV * self
1083 PROTOTYPE: $ 2276 PROTOTYPE: $
1084 CODE: 2277 CODE:
1085 api_ready (self); 2278 SvREFCNT_dec (SvRV (coro_current));
2279 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1086 2280
1087#endif 2281void
2282_set_readyhook (SV *hook)
2283 PROTOTYPE: $
2284 CODE:
2285 LOCK;
2286 SvREFCNT_dec (coro_readyhook);
2287 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2288 UNLOCK;
1088 2289
1089int 2290int
2291prio (Coro::State coro, int newprio = 0)
2292 ALIAS:
2293 nice = 1
2294 CODE:
2295{
2296 RETVAL = coro->prio;
2297
2298 if (items > 1)
2299 {
2300 if (ix)
2301 newprio = coro->prio - newprio;
2302
2303 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2304 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2305
2306 coro->prio = newprio;
2307 }
2308}
2309 OUTPUT:
2310 RETVAL
2311
2312SV *
2313ready (SV *self)
2314 PROTOTYPE: $
2315 CODE:
2316 RETVAL = boolSV (api_ready (self));
2317 OUTPUT:
2318 RETVAL
2319
2320int
1090nready(...) 2321nready (...)
1091 PROTOTYPE: 2322 PROTOTYPE:
1092 CODE: 2323 CODE:
1093 RETVAL = coro_nready; 2324 RETVAL = coro_nready;
1094 OUTPUT: 2325 OUTPUT:
1095 RETVAL 2326 RETVAL
1096 2327
2328# for async_pool speedup
1097void 2329void
1098schedule(...) 2330_pool_1 (SV *cb)
1099 PROTOTYPE:
1100 CODE: 2331 CODE:
1101 api_schedule (); 2332{
2333 struct coro *coro = SvSTATE (coro_current);
2334 HV *hv = (HV *)SvRV (coro_current);
2335 AV *defav = GvAV (PL_defgv);
2336 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2337 AV *invoke_av;
2338 int i, len;
2339
2340 if (!invoke)
2341 {
2342 SV *old = PL_diehook;
2343 PL_diehook = 0;
2344 SvREFCNT_dec (old);
2345 croak ("\3async_pool terminate\2\n");
2346 }
2347
2348 SvREFCNT_dec (coro->saved_deffh);
2349 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2350
2351 hv_store (hv, "desc", sizeof ("desc") - 1,
2352 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2353
2354 invoke_av = (AV *)SvRV (invoke);
2355 len = av_len (invoke_av);
2356
2357 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2358
2359 if (len > 0)
2360 {
2361 av_fill (defav, len - 1);
2362 for (i = 0; i < len; ++i)
2363 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2364 }
2365
2366 SvREFCNT_dec (invoke);
2367}
1102 2368
1103void 2369void
1104cede(...) 2370_pool_2 (SV *cb)
1105 PROTOTYPE:
1106 CODE: 2371 CODE:
2372{
2373 struct coro *coro = SvSTATE (coro_current);
2374
2375 sv_setsv (cb, &PL_sv_undef);
2376
2377 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2378 coro->saved_deffh = 0;
2379
2380 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2381 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2382 {
2383 SV *old = PL_diehook;
2384 PL_diehook = 0;
2385 SvREFCNT_dec (old);
2386 croak ("\3async_pool terminate\2\n");
2387 }
2388
2389 av_clear (GvAV (PL_defgv));
2390 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2391 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2392
2393 coro->prio = 0;
2394
2395 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2396 api_trace (coro_current, 0);
2397
2398 av_push (av_async_pool, newSVsv (coro_current));
2399}
2400
2401#if 0
2402
2403void
2404_generator_call (...)
2405 PROTOTYPE: @
2406 PPCODE:
2407 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2408 xxxx
2409 abort ();
2410
2411SV *
2412gensub (SV *sub, ...)
2413 PROTOTYPE: &;@
2414 CODE:
2415{
2416 struct coro *coro;
2417 MAGIC *mg;
2418 CV *xcv;
2419 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2420 int i;
2421
2422 CvGV (ncv) = CvGV (cv);
2423 CvFILE (ncv) = CvFILE (cv);
2424
2425 Newz (0, coro, 1, struct coro);
2426 coro->args = newAV ();
2427 coro->flags = CF_NEW;
2428
2429 av_extend (coro->args, items - 1);
2430 for (i = 1; i < items; i++)
2431 av_push (coro->args, newSVsv (ST (i)));
2432
2433 CvISXSUB_on (ncv);
2434 CvXSUBANY (ncv).any_ptr = (void *)coro;
2435
2436 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2437
2438 CvXSUB (ncv) = CvXSUB (xcv);
2439 CvANON_on (ncv);
2440
2441 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2442 RETVAL = newRV_noinc ((SV *)ncv);
2443}
2444 OUTPUT:
2445 RETVAL
2446
2447#endif
2448
2449
2450MODULE = Coro::State PACKAGE = Coro::AIO
2451
2452void
2453_get_state (SV *self)
2454 PPCODE:
2455{
2456 AV *defav = GvAV (PL_defgv);
2457 AV *av = newAV ();
2458 int i;
2459 SV *data_sv = newSV (sizeof (struct io_state));
2460 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2461 SvCUR_set (data_sv, sizeof (struct io_state));
2462 SvPOK_only (data_sv);
2463
2464 data->errorno = errno;
2465 data->laststype = PL_laststype;
2466 data->laststatval = PL_laststatval;
2467 data->statcache = PL_statcache;
2468
2469 av_extend (av, AvFILLp (defav) + 1 + 1);
2470
2471 for (i = 0; i <= AvFILLp (defav); ++i)
2472 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2473
2474 av_push (av, data_sv);
2475
2476 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2477
2478 api_ready (self);
2479}
2480
2481void
2482_set_state (SV *state)
2483 PROTOTYPE: $
2484 PPCODE:
2485{
2486 AV *av = (AV *)SvRV (state);
2487 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2488 int i;
2489
2490 errno = data->errorno;
2491 PL_laststype = data->laststype;
2492 PL_laststatval = data->laststatval;
2493 PL_statcache = data->statcache;
2494
2495 EXTEND (SP, AvFILLp (av));
2496 for (i = 0; i < AvFILLp (av); ++i)
2497 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2498}
2499
2500
2501MODULE = Coro::State PACKAGE = Coro::AnyEvent
2502
2503BOOT:
2504 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2505
2506SV *
2507_schedule (...)
2508 PROTOTYPE: @
2509 CODE:
2510{
2511 static int incede;
2512
1107 api_cede (); 2513 api_cede_notself ();
1108 2514
2515 ++incede;
2516 while (coro_nready >= incede && api_cede ())
2517 ;
2518
2519 sv_setsv (sv_activity, &PL_sv_undef);
2520 if (coro_nready >= incede)
2521 {
2522 PUSHMARK (SP);
2523 PUTBACK;
2524 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2525 SPAGAIN;
2526 }
2527
2528 --incede;
2529}
2530
2531
2532MODULE = Coro::State PACKAGE = PerlIO::cede
2533
2534BOOT:
2535 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2536

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