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Comparing Coro/Coro/State.xs (file contents):
Revision 1.14 by root, Mon Jul 23 23:48:05 2001 UTC vs.
Revision 1.276 by root, Sat Nov 15 07:49:48 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 "libcoro/coro.c" 11#include "patchlevel.h"
12
13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
6 25
7#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
8# include <unistd.h> 27# include <unistd.h>
9# include <sys/mman.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
10#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
11 48
12#define MAY_FLUSH /* increases codesize */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
13 52
14#define TRANSFER_SAVE_DEFAV 0x00000001 53/* the maximum number of idle cctx that will be pooled */
15#define TRANSFER_SAVE_DEFSV 0x00000002 54static int cctx_max_idle = 4;
16#define TRANSFER_SAVE_ERRSV 0x00000004
17#define TRANSFER_SAVE_CCTXT 0x00000008
18 55
19#define TRANSFER_SAVE_ALL -1 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)))))
20 61
21#define SUB_INIT "Coro::State::initialize" 62#if !PERL_VERSION_ATLEAST (5,6,0)
22#define UCORO_STATE "_coro_state" 63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
23 82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
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;
153# endif
154
155#else
156
157# define LOCK (void)0
158# define UNLOCK (void)0
159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
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};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
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;
187
188static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook;
191static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */
193
194/* async_pool helper stuff */
195static SV *sv_pool_rss;
196static SV *sv_pool_size;
197static AV *av_async_pool;
198
199/* Coro::AnyEvent */
200static SV *sv_activity;
201
202static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle;
204
205enum {
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
213
214/* this is a structure representing a c-level coroutine */
215typedef struct coro_cctx
216{
217 struct coro_cctx *next;
218
219 /* the stack */
220 void *sptr;
221 size_t ssize;
222
223 /* cpu state */
224 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
225 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
226 JMPENV *top_env;
227 coro_context cctx;
228
229 U32 gen;
230#if CORO_USE_VALGRIND
231 int valgrind_id;
232#endif
233 unsigned char flags;
234} coro_cctx;
235
236enum {
237 CF_RUNNING = 0x0001, /* coroutine is running */
238 CF_READY = 0x0002, /* coroutine is ready */
239 CF_NEW = 0x0004, /* has never been switched to */
240 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
241};
242
243/* the structure where most of the perl state is stored, overlaid on the cxstack */
244typedef struct
245{
246 SV *defsv;
247 AV *defav;
248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
254
255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
256
257/* this is a structure representing a perl-level coroutine */
24struct coro { 258struct coro {
25 /* the optional C context */ 259 /* the C coroutine allocated to this perl coroutine, if any */
26 coro_context cctx; 260 coro_cctx *cctx;
27 void *sptr;
28 long ssize;
29 261
30 /* optionally saved, might be zero */ 262 /* process data */
31 AV *defav; 263 struct CoroSLF slf_frame; /* saved slf frame */
32 SV *defsv;
33 SV *errsv;
34
35 /* saved global state not related to stacks */
36 U8 dowarn;
37
38 /* the stacks and related info (callchain etc..) */
39 PERL_SI *curstackinfo;
40 AV *curstack;
41 AV *mainstack; 264 AV *mainstack;
42 SV **stack_sp; 265 perl_slots *slot; /* basically the saved sp */
43 OP *op;
44 SV **curpad;
45 SV **stack_base;
46 SV **stack_max;
47 SV **tmps_stack;
48 I32 tmps_floor;
49 I32 tmps_ix;
50 I32 tmps_max;
51 I32 *markstack;
52 I32 *markstack_ptr;
53 I32 *markstack_max;
54 I32 *scopestack;
55 I32 scopestack_ix;
56 I32 scopestack_max;
57 ANY *savestack;
58 I32 savestack_ix;
59 I32 savestack_max;
60 OP **retstack;
61 I32 retstack_ix;
62 I32 retstack_max;
63 COP *curcop;
64 JMPENV start_env;
65 JMPENV *top_env;
66 266
67 /* data associated with this coroutine (initial args) */ 267 AV *args; /* data associated with this coroutine (initial args) */
68 AV *args; 268 int refcnt; /* coroutines are refcounted, yes */
269 int flags; /* CF_ flags */
270 HV *hv; /* the perl hash associated with this coro, if any */
271
272 /* statistics */
273 int usecount; /* number of transfers to this coro */
274
275 /* coro process data */
276 int prio;
277 SV *throw; /* exception to be thrown */
278
279 /* async_pool */
280 SV *saved_deffh;
281
282 /* linked list */
283 struct coro *next, *prev;
69}; 284};
70 285
71typedef struct coro *Coro__State; 286typedef struct coro *Coro__State;
72typedef struct coro *Coro__State_or_hashref; 287typedef struct coro *Coro__State_or_hashref;
73 288
74static AV *main_mainstack; /* used to differentiate between $main and others */ 289static struct CoroSLF slf_frame; /* the current slf frame */
75static HV *coro_state_stash;
76static SV *ucoro_state_sv;
77static U32 ucoro_state_hash;
78static HV *padlist_cache;
79 290
80/* mostly copied from op.c:cv_clone2 */ 291/** Coro ********************************************************************/
81STATIC AV * 292
82clone_padlist (AV *protopadlist) 293#define PRIO_MAX 3
294#define PRIO_HIGH 1
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 struct coro *coro_first;
305#define coro_nready coroapi.nready
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
83{ 311{
84 AV *av; 312#if PERL_VERSION_ATLEAST (5,10,0)
85 I32 ix; 313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
86 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 314 get_sv (name, create);
87 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 315#endif
88 SV **pname = AvARRAY (protopad_name); 316 return get_sv (name, create);
89 SV **ppad = AvARRAY (protopad); 317}
90 I32 fname = AvFILLp (protopad_name); 318
91 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);
92 AV *newpadlist, *newpad_name, *newpad; 343 AV *newpadlist, *newpad;
93 SV **npad;
94
95 newpad_name = newAV ();
96 for (ix = fname; ix >= 0; ix--)
97 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
98
99 newpad = newAV ();
100 av_fill (newpad, AvFILLp (protopad));
101 npad = AvARRAY (newpad);
102 344
103 newpadlist = newAV (); 345 newpadlist = newAV ();
104 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
105 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)));
106 av_store (newpadlist, 1, (SV *) newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
107 357
108 av = newAV (); /* will be @_ */ 358 return newpadlist;
109 av_extend (av, 0); 359}
110 av_store (newpad, 0, (SV *) av);
111 AvFLAGS (av) = AVf_REIFY;
112 360
113 for (ix = fpad; ix > 0; ix--) 361static void
362free_padlist (pTHX_ AV *padlist)
363{
364 /* may be during global destruction */
365 if (SvREFCNT (padlist))
114 { 366 {
115 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 367 I32 i = AvFILLp (padlist);
116 if (namesv && namesv != &PL_sv_undef) 368 while (i >= 0)
117 { 369 {
118 char *name = SvPVX (namesv); /* XXX */ 370 SV **svp = av_fetch (padlist, i--, FALSE);
119 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 371 if (svp)
120 { /* lexical from outside? */
121 npad[ix] = SvREFCNT_inc (ppad[ix]);
122 } 372 {
123 else
124 { /* our own lexical */
125 SV *sv; 373 SV *sv;
126 if (*name == '&') 374 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
127 sv = SvREFCNT_inc (ppad[ix]); 375 SvREFCNT_dec (sv);
128 else if (*name == '@') 376
129 sv = (SV *) newAV (); 377 SvREFCNT_dec (*svp);
130 else if (*name == '%')
131 sv = (SV *) newHV ();
132 else
133 sv = NEWSV (0, 0);
134 if (!SvPADBUSY (sv))
135 SvPADMY_on (sv);
136 npad[ix] = sv;
137 } 378 }
138 } 379 }
139 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
140 {
141 npad[ix] = SvREFCNT_inc (ppad[ix]);
142 }
143 else
144 {
145 SV *sv = NEWSV (0, 0);
146 SvPADTMP_on (sv);
147 npad[ix] = sv;
148 }
149 }
150 380
151#if 0 /* return -ENOTUNDERSTOOD */
152 /* Now that vars are all in place, clone nested closures. */
153
154 for (ix = fpad; ix > 0; ix--) {
155 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
156 if (namesv
157 && namesv != &PL_sv_undef
158 && !(SvFLAGS(namesv) & SVf_FAKE)
159 && *SvPVX(namesv) == '&'
160 && CvCLONE(ppad[ix]))
161 {
162 CV *kid = cv_clone((CV*)ppad[ix]);
163 SvREFCNT_dec(ppad[ix]);
164 CvCLONE_on(kid);
165 SvPADMY_on(kid);
166 npad[ix] = (SV*)kid;
167 }
168 }
169#endif
170
171 return newpadlist;
172}
173
174#ifdef MAY_FLUSH
175STATIC AV *
176free_padlist (AV *padlist)
177{
178 /* may be during global destruction */
179 if (SvREFCNT(padlist))
180 {
181 I32 i = AvFILLp(padlist);
182 while (i >= 0)
183 {
184 SV **svp = av_fetch(padlist, i--, FALSE);
185 SV *sv = svp ? *svp : Nullsv;
186 if (sv)
187 SvREFCNT_dec(sv);
188 }
189
190 SvREFCNT_dec((SV*)padlist); 381 SvREFCNT_dec ((SV*)padlist);
191 } 382 }
192} 383}
193#endif 384
385static int
386coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
387{
388 AV *padlist;
389 AV *av = (AV *)mg->mg_obj;
390
391 /* casting is fun. */
392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
393 free_padlist (aTHX_ padlist);
394
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396
397 return 0;
398}
399
400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
402
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))
194 443
195/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
196STATIC void 445static void
197get_padlist (CV *cv) 446get_padlist (pTHX_ CV *cv)
198{ 447{
199 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
200 450
201 if (he && AvFILLp ((AV *)*he) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
202 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
203 else 453 else
204 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
205}
206
207STATIC void
208put_padlist (CV *cv)
209{
210 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
211
212 if (SvTYPE (*he) != SVt_PVAV)
213 { 454 {
455#if CORO_PREFER_PERL_FUNCTIONS
456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
458 CV *cp = Perl_cv_clone (cv);
459 CvPADLIST (cv) = CvPADLIST (cp);
460 CvPADLIST (cp) = 0;
214 SvREFCNT_dec (*he); 461 SvREFCNT_dec (cp);
215 *he = (SV *)newAV (); 462#else
463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
464#endif
216 } 465 }
217
218 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
219} 466}
220 467
221#ifdef MAY_FLUSH
222STATIC void
223flush_padlist_cache ()
224{
225 HV *hv = padlist_cache;
226 padlist_cache = newHV ();
227
228 if (hv_iterinit (hv))
229 {
230 HE *he;
231 AV *padlist;
232
233 while (!!(he = hv_iternext (hv)))
234 {
235 AV *av = (AV *)HeVAL(he);
236
237 /* casting is fun. */
238 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
239 free_padlist (padlist);
240 }
241 }
242
243 SvREFCNT_dec (hv);
244}
245#endif
246
247#define SB do {
248#define SE } while (0)
249
250#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
251#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
252
253#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
254
255static 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
256load_state(pTHX_ Coro__State c) 488load_perl (pTHX_ Coro__State c)
257{ 489{
258 PL_dowarn = c->dowarn; 490 perl_slots *slot = c->slot;
491 c->slot = 0;
259 492
260 PL_curstackinfo = c->curstackinfo;
261 PL_curstack = c->curstack;
262 PL_mainstack = c->mainstack; 493 PL_mainstack = c->mainstack;
263 PL_stack_sp = c->stack_sp;
264 PL_op = c->op;
265 PL_curpad = c->curpad;
266 PL_stack_base = c->stack_base;
267 PL_stack_max = c->stack_max;
268 PL_tmps_stack = c->tmps_stack;
269 PL_tmps_floor = c->tmps_floor;
270 PL_tmps_ix = c->tmps_ix;
271 PL_tmps_max = c->tmps_max;
272 PL_markstack = c->markstack;
273 PL_markstack_ptr = c->markstack_ptr;
274 PL_markstack_max = c->markstack_max;
275 PL_scopestack = c->scopestack;
276 PL_scopestack_ix = c->scopestack_ix;
277 PL_scopestack_max = c->scopestack_max;
278 PL_savestack = c->savestack;
279 PL_savestack_ix = c->savestack_ix;
280 PL_savestack_max = c->savestack_max;
281 PL_retstack = c->retstack;
282 PL_retstack_ix = c->retstack_ix;
283 PL_retstack_max = c->retstack_max;
284 PL_curcop = c->curcop;
285 PL_start_env = c->start_env;
286 PL_top_env = c->top_env;
287 494
288 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 495 GvSV (PL_defgv) = slot->defsv;
289 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 496 GvAV (PL_defgv) = slot->defav;
290 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
291 503
292 { 504 {
293 dSP; 505 dSP;
506
294 CV *cv; 507 CV *cv;
295 508
296 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
297 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
298 { 511 {
299 AV *padlist = (AV *)POPs;
300
301 if (padlist)
302 {
303 put_padlist (cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
304 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
305#ifdef USE_THREADS 514 CvPADLIST (cv) = (AV *)POPs;
306 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
307#endif
308 }
309
310 ++CvDEPTH(cv);
311 } 515 }
312 516
313 PUTBACK; 517 PUTBACK;
314 } 518 }
315}
316 519
520 slf_frame = c->slf_frame;
521}
522
317static void 523static void
318save_state(pTHX_ Coro__State c, int flags) 524save_perl (pTHX_ Coro__State c)
319{ 525{
526 c->slf_frame = slf_frame;
527
320 { 528 {
321 dSP; 529 dSP;
322 I32 cxix = cxstack_ix; 530 I32 cxix = cxstack_ix;
323 PERL_CONTEXT *ccstk = cxstack; 531 PERL_CONTEXT *ccstk = cxstack;
324 PERL_SI *top_si = PL_curstackinfo; 532 PERL_SI *top_si = PL_curstackinfo;
… …
326 /* 534 /*
327 * the worst thing you can imagine happens first - we have to save 535 * the worst thing you can imagine happens first - we have to save
328 * (and reinitialize) all cv's in the whole callchain :( 536 * (and reinitialize) all cv's in the whole callchain :(
329 */ 537 */
330 538
331 PUSHs (Nullsv); 539 XPUSHs (Nullsv);
332 /* this loop was inspired by pp_caller */ 540 /* this loop was inspired by pp_caller */
333 for (;;) 541 for (;;)
334 { 542 {
335 do 543 while (expect_true (cxix >= 0))
336 { 544 {
337 PERL_CONTEXT *cx = &ccstk[cxix--]; 545 PERL_CONTEXT *cx = &ccstk[cxix--];
338 546
339 if (CxTYPE(cx) == CXt_SUB) 547 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
340 { 548 {
341 CV *cv = cx->blk_sub.cv; 549 CV *cv = cx->blk_sub.cv;
550
342 if (CvDEPTH(cv)) 551 if (expect_true (CvDEPTH (cv)))
343 { 552 {
344#ifdef USE_THREADS
345 /*XPUSHs ((SV *)CvOWNER(cv));*/
346 /*CvOWNER(cv) = 0;*/
347 /*error must unlock this cv etc.. etc...*/
348#endif
349 EXTEND (SP, CvDEPTH(cv)*2); 553 EXTEND (SP, 3);
350
351 while (--CvDEPTH(cv))
352 {
353 /* this tells the restore code to increment CvDEPTH */
354 PUSHs (Nullsv);
355 PUSHs ((SV *)cv);
356 }
357
358 PUSHs ((SV *)CvPADLIST(cv)); 554 PUSHs ((SV *)CvPADLIST (cv));
555 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
359 PUSHs ((SV *)cv); 556 PUSHs ((SV *)cv);
360 557
361 get_padlist (cv); /* this is a monster */ 558 CvDEPTH (cv) = 0;
559 get_padlist (aTHX_ cv);
362 } 560 }
363 } 561 }
364 else if (CxTYPE(cx) == CXt_FORMAT)
365 {
366 /* I never used formats, so how should I know how these are implemented? */
367 /* my bold guess is as a simple, plain sub... */
368 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
369 }
370 } 562 }
371 while (cxix >= 0);
372 563
373 if (top_si->si_type == PERLSI_MAIN) 564 if (expect_true (top_si->si_type == PERLSI_MAIN))
374 break; 565 break;
375 566
376 top_si = top_si->si_prev; 567 top_si = top_si->si_prev;
377 ccstk = top_si->si_cxstack; 568 ccstk = top_si->si_cxstack;
378 cxix = top_si->si_cxix; 569 cxix = top_si->si_cxix;
379 } 570 }
380 571
381 PUTBACK; 572 PUTBACK;
382 } 573 }
383 574
384 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 575 /* allocate some space on the context stack for our purposes */
385 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 576 /* we manually unroll here, as usually 2 slots is enough */
386 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 577 if (SLOT_COUNT >= 1) CXINC;
578 if (SLOT_COUNT >= 2) CXINC;
579 if (SLOT_COUNT >= 3) CXINC;
580 {
581 int i;
582 for (i = 3; i < SLOT_COUNT; ++i)
583 CXINC;
584 }
585 cxstack_ix -= SLOT_COUNT; /* undo allocation */
387 586
388 /* I have not the slightest idea of why av_reify is necessary */
389 /* but if it's missing the defav contents magically get replaced sometimes */
390 if (c->defav)
391 av_reify (c->defav);
392
393 c->dowarn = PL_dowarn;
394
395 c->curstackinfo = PL_curstackinfo;
396 c->curstack = PL_curstack;
397 c->mainstack = PL_mainstack; 587 c->mainstack = PL_mainstack;
398 c->stack_sp = PL_stack_sp; 588
399 c->op = PL_op; 589 {
400 c->curpad = PL_curpad; 590 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
401 c->stack_base = PL_stack_base; 591
402 c->stack_max = PL_stack_max; 592 slot->defav = GvAV (PL_defgv);
403 c->tmps_stack = PL_tmps_stack; 593 slot->defsv = DEFSV;
404 c->tmps_floor = PL_tmps_floor; 594 slot->errsv = ERRSV;
405 c->tmps_ix = PL_tmps_ix; 595 slot->irsgv = GvSV (irsgv);
406 c->tmps_max = PL_tmps_max; 596
407 c->markstack = PL_markstack; 597 #define VAR(name,type) slot->name = PL_ ## name;
408 c->markstack_ptr = PL_markstack_ptr; 598 # include "state.h"
409 c->markstack_max = PL_markstack_max; 599 #undef VAR
410 c->scopestack = PL_scopestack; 600 }
411 c->scopestack_ix = PL_scopestack_ix;
412 c->scopestack_max = PL_scopestack_max;
413 c->savestack = PL_savestack;
414 c->savestack_ix = PL_savestack_ix;
415 c->savestack_max = PL_savestack_max;
416 c->retstack = PL_retstack;
417 c->retstack_ix = PL_retstack_ix;
418 c->retstack_max = PL_retstack_max;
419 c->curcop = PL_curcop;
420 c->start_env = PL_start_env;
421 c->top_env = PL_top_env;
422} 601}
423 602
424/* 603/*
425 * allocate various perl stacks. This is an exact copy 604 * allocate various perl stacks. This is almost an exact copy
426 * of perl.c:init_stacks, except that it uses less memory 605 * of perl.c:init_stacks, except that it uses less memory
427 * on the assumption that coroutines do not usually need 606 * on the (sometimes correct) assumption that coroutines do
428 * a lot of stackspace. 607 * not usually need a lot of stackspace.
429 */ 608 */
430STATIC void 609#if CORO_PREFER_PERL_FUNCTIONS
610# define coro_init_stacks init_stacks
611#else
612static void
431coro_init_stacks (pTHX) 613coro_init_stacks (pTHX)
432{ 614{
433 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 615 PL_curstackinfo = new_stackinfo(32, 8);
434 PL_curstackinfo->si_type = PERLSI_MAIN; 616 PL_curstackinfo->si_type = PERLSI_MAIN;
435 PL_curstack = PL_curstackinfo->si_stack; 617 PL_curstack = PL_curstackinfo->si_stack;
436 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 618 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
437 619
438 PL_stack_base = AvARRAY(PL_curstack); 620 PL_stack_base = AvARRAY(PL_curstack);
439 PL_stack_sp = PL_stack_base; 621 PL_stack_sp = PL_stack_base;
440 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 622 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
441 623
442 New(50,PL_tmps_stack,64,SV*); 624 New(50,PL_tmps_stack,32,SV*);
443 PL_tmps_floor = -1; 625 PL_tmps_floor = -1;
444 PL_tmps_ix = -1; 626 PL_tmps_ix = -1;
445 PL_tmps_max = 64; 627 PL_tmps_max = 32;
446 628
447 New(54,PL_markstack,12,I32); 629 New(54,PL_markstack,16,I32);
448 PL_markstack_ptr = PL_markstack; 630 PL_markstack_ptr = PL_markstack;
449 PL_markstack_max = PL_markstack + 12; 631 PL_markstack_max = PL_markstack + 16;
450 632
633#ifdef SET_MARK_OFFSET
451 SET_MARK_OFFSET; 634 SET_MARK_OFFSET;
635#endif
452 636
453 New(54,PL_scopestack,12,I32); 637 New(54,PL_scopestack,8,I32);
454 PL_scopestack_ix = 0; 638 PL_scopestack_ix = 0;
455 PL_scopestack_max = 12; 639 PL_scopestack_max = 8;
456 640
457 New(54,PL_savestack,64,ANY); 641 New(54,PL_savestack,24,ANY);
458 PL_savestack_ix = 0; 642 PL_savestack_ix = 0;
459 PL_savestack_max = 64; 643 PL_savestack_max = 24;
460 644
645#if !PERL_VERSION_ATLEAST (5,10,0)
461 New(54,PL_retstack,8,OP*); 646 New(54,PL_retstack,4,OP*);
462 PL_retstack_ix = 0; 647 PL_retstack_ix = 0;
463 PL_retstack_max = 8; 648 PL_retstack_max = 4;
649#endif
464} 650}
651#endif
465 652
466/* 653/*
467 * destroy the stacks, the callchain etc... 654 * destroy the stacks, the callchain etc...
468 * still there is a memleak of 128 bytes...
469 */ 655 */
470STATIC void 656static void
471destroy_stacks(pTHX) 657coro_destruct_stacks (pTHX)
472{ 658{
473 /* is this ugly, I ask? */
474 while (PL_scopestack_ix)
475 LEAVE;
476
477 /* sure it is, but more important: is it correct?? :/ */
478 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
479 FREETMPS;
480
481 while (PL_curstackinfo->si_next) 659 while (PL_curstackinfo->si_next)
482 PL_curstackinfo = PL_curstackinfo->si_next; 660 PL_curstackinfo = PL_curstackinfo->si_next;
483 661
484 while (PL_curstackinfo) 662 while (PL_curstackinfo)
485 { 663 {
486 PERL_SI *p = PL_curstackinfo->si_prev; 664 PERL_SI *p = PL_curstackinfo->si_prev;
487 665
488 { 666 if (!IN_DESTRUCT)
489 dSP;
490 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
491 PUTBACK; /* possibly superfluous */
492 }
493
494 dounwind(-1);
495
496 SvREFCNT_dec(PL_curstackinfo->si_stack); 667 SvREFCNT_dec (PL_curstackinfo->si_stack);
668
497 Safefree(PL_curstackinfo->si_cxstack); 669 Safefree (PL_curstackinfo->si_cxstack);
498 Safefree(PL_curstackinfo); 670 Safefree (PL_curstackinfo);
499 PL_curstackinfo = p; 671 PL_curstackinfo = p;
500 } 672 }
501 673
502 Safefree(PL_tmps_stack); 674 Safefree (PL_tmps_stack);
503 Safefree(PL_markstack); 675 Safefree (PL_markstack);
504 Safefree(PL_scopestack); 676 Safefree (PL_scopestack);
505 Safefree(PL_savestack); 677 Safefree (PL_savestack);
678#if !PERL_VERSION_ATLEAST (5,10,0)
506 Safefree(PL_retstack); 679 Safefree (PL_retstack);
507}
508
509static void
510allocate_stack (Coro__State ctx)
511{
512#ifdef HAVE_MMAP
513 ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
514 ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
515 if (ctx->sptr == (void *)-1)
516#endif 680#endif
517 { 681}
518 /*FIXME*//*D*//* reasonable stack size! */ 682
519 ctx->ssize = 4096 * sizeof (long); 683static size_t
520 New (0, ctx->sptr, 4096, long); 684coro_rss (pTHX_ struct coro *coro)
685{
686 size_t rss = sizeof (*coro);
687
688 if (coro->mainstack)
521 } 689 {
522} 690 perl_slots tmp_slot;
691 perl_slots *slot;
523 692
693 if (coro->flags & CF_RUNNING)
694 {
695 slot = &tmp_slot;
696
697 #define VAR(name,type) slot->name = PL_ ## name;
698 # include "state.h"
699 #undef VAR
700 }
701 else
702 slot = coro->slot;
703
704 if (slot)
705 {
706 rss += sizeof (slot->curstackinfo);
707 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
708 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
709 rss += slot->tmps_max * sizeof (SV *);
710 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
711 rss += slot->scopestack_max * sizeof (I32);
712 rss += slot->savestack_max * sizeof (ANY);
713
714#if !PERL_VERSION_ATLEAST (5,10,0)
715 rss += slot->retstack_max * sizeof (OP *);
716#endif
717 }
718 }
719
720 return rss;
721}
722
723/** coroutine stack handling ************************************************/
724
725static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
726static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
727static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
728
729/* apparently < 5.8.8 */
730#ifndef MgPV_nolen_const
731#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
732 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
733 (const char*)(mg)->mg_ptr)
734#endif
735
736/*
737 * This overrides the default magic get method of %SIG elements.
738 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
739 * and instead of tryign to save and restore the hash elements, we just provide
740 * readback here.
741 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
742 * not expecting this to actually change the hook. This is a potential problem
743 * when a schedule happens then, but we ignore this.
744 */
524static void 745static int
525deallocate_stack (Coro__State ctx) 746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
526{ 747{
527#ifdef HAVE_MMAP 748 const char *s = MgPV_nolen_const (mg);
528 munmap (ctx->sptr, ctx->ssize);
529#else
530 Safefree (ctx->sptr);
531#endif
532}
533 749
534/* might go away together with optional SAVE_CCTXT */ 750 if (*s == '_')
751 {
752 SV **svp = 0;
753
754 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
755 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
756
757 if (svp)
758 {
759 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
760 return 0;
761 }
762 }
763
764 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
765}
766
535static void 767static int
536setup_coro (void *arg) 768coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771
772 if (*s == '_')
773 {
774 SV **svp = 0;
775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 SV *old = *svp;
782 *svp = 0;
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
789}
790
791static int
792coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
793{
794 const char *s = MgPV_nolen_const (mg);
795
796 if (*s == '_')
797 {
798 SV **svp = 0;
799
800 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802
803 if (svp)
804 {
805 SV *old = *svp;
806 *svp = newSVsv (sv);
807 SvREFCNT_dec (old);
808 return 0;
809 }
810 }
811
812 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813}
814
815static void
816prepare_nop (aTHX_ struct coro_transfer_args *ta)
817{
818 /* kind of mega-hacky, but works */
819 ta->next = ta->prev = (struct coro *)ta;
820}
821
822static int
823slf_check_nop (aTHX)
824{
825 return 0;
826}
827
828static void
829coro_setup (pTHX_ struct coro *coro)
537{ 830{
538 /* 831 /*
539 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
540 */ 833 */
834 coro_init_stacks (aTHX);
835
836 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0;
840 PL_curpm = 0;
841 PL_curpad = 0;
842 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859
860 {
861 dSP;
862 UNOP myop;
863
864 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop;
866 myop.op_flags = OPf_WANT_VOID;
867
868 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
870 PUTBACK;
871 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 }
875
876 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881}
882
883static void
884coro_destruct (pTHX_ struct coro *coro)
885{
886 if (!IN_DESTRUCT)
887 {
888 /* restore all saved variables and stuff */
889 LEAVE_SCOPE (0);
890 assert (PL_tmps_floor == -1);
891
892 /* free all temporaries */
893 FREETMPS;
894 assert (PL_tmps_ix == -1);
895
896 /* unwind all extra stacks */
897 POPSTACK_TO (PL_mainstack);
898
899 /* unwind main stack */
900 dounwind (-1);
901 }
902
903 SvREFCNT_dec (GvSV (PL_defgv));
904 SvREFCNT_dec (GvAV (PL_defgv));
905 SvREFCNT_dec (GvSV (PL_errgv));
906 SvREFCNT_dec (PL_defoutgv);
907 SvREFCNT_dec (PL_rs);
908 SvREFCNT_dec (GvSV (irsgv));
909
910 SvREFCNT_dec (PL_diehook);
911 SvREFCNT_dec (PL_warnhook);
912
913 SvREFCNT_dec (coro->saved_deffh);
914 SvREFCNT_dec (coro->throw);
915
916 coro_destruct_stacks (aTHX);
917}
918
919INLINE void
920free_coro_mortal (pTHX)
921{
922 if (expect_true (coro_mortal))
923 {
924 SvREFCNT_dec (coro_mortal);
925 coro_mortal = 0;
926 }
927}
928
929static int
930runops_trace (pTHX)
931{
932 COP *oldcop = 0;
933 int oldcxix = -2;
934 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
935 coro_cctx *cctx = coro->cctx;
936
937 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
938 {
939 PERL_ASYNC_CHECK ();
940
941 if (cctx->flags & CC_TRACE_ALL)
942 {
943 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
944 {
945 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
946 SV **bot, **top;
947 AV *av = newAV (); /* return values */
948 SV **cb;
949 dSP;
950
951 GV *gv = CvGV (cx->blk_sub.cv);
952 SV *fullname = sv_2mortal (newSV (0));
953 if (isGV (gv))
954 gv_efullname3 (fullname, gv, 0);
955
956 bot = PL_stack_base + cx->blk_oldsp + 1;
957 top = cx->blk_gimme == G_ARRAY ? SP + 1
958 : cx->blk_gimme == G_SCALAR ? bot + 1
959 : bot;
960
961 av_extend (av, top - bot);
962 while (bot < top)
963 av_push (av, SvREFCNT_inc_NN (*bot++));
964
965 PL_runops = RUNOPS_DEFAULT;
966 ENTER;
967 SAVETMPS;
968 EXTEND (SP, 3);
969 PUSHMARK (SP);
970 PUSHs (&PL_sv_no);
971 PUSHs (fullname);
972 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
973 PUTBACK;
974 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
975 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
976 SPAGAIN;
977 FREETMPS;
978 LEAVE;
979 PL_runops = runops_trace;
980 }
981
982 if (oldcop != PL_curcop)
983 {
984 oldcop = PL_curcop;
985
986 if (PL_curcop != &PL_compiling)
987 {
988 SV **cb;
989
990 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
991 {
992 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
993
994 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
995 {
996 runops_proc_t old_runops = PL_runops;
997 dSP;
998 GV *gv = CvGV (cx->blk_sub.cv);
999 SV *fullname = sv_2mortal (newSV (0));
1000
1001 if (isGV (gv))
1002 gv_efullname3 (fullname, gv, 0);
1003
1004 PL_runops = RUNOPS_DEFAULT;
1005 ENTER;
1006 SAVETMPS;
1007 EXTEND (SP, 3);
1008 PUSHMARK (SP);
1009 PUSHs (&PL_sv_yes);
1010 PUSHs (fullname);
1011 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1012 PUTBACK;
1013 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1014 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1015 SPAGAIN;
1016 FREETMPS;
1017 LEAVE;
1018 PL_runops = runops_trace;
1019 }
1020
1021 oldcxix = cxstack_ix;
1022 }
1023
1024 if (cctx->flags & CC_TRACE_LINE)
1025 {
1026 dSP;
1027
1028 PL_runops = RUNOPS_DEFAULT;
1029 ENTER;
1030 SAVETMPS;
1031 EXTEND (SP, 3);
1032 PL_runops = RUNOPS_DEFAULT;
1033 PUSHMARK (SP);
1034 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1035 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1036 PUTBACK;
1037 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1038 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1039 SPAGAIN;
1040 FREETMPS;
1041 LEAVE;
1042 PL_runops = runops_trace;
1043 }
1044 }
1045 }
1046 }
1047 }
1048
1049 TAINT_NOT;
1050 return 0;
1051}
1052
1053static void
1054prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1055{
1056 ta->prev = (struct coro *)cctx;
1057 ta->next = 0;
1058}
1059
1060/* inject a fake call to Coro::State::_cctx_init into the execution */
1061/* _cctx_init should be careful, as it could be called at almost any time */
1062/* during execution of a perl program */
1063/* also initialises PL_top_env */
1064static void NOINLINE
1065cctx_prepare (pTHX_ coro_cctx *cctx)
1066{
541 dSP; 1067 dSP;
542 Coro__State ctx = (Coro__State)arg; 1068 UNOP myop;
543 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
544 1069
545 coro_init_stacks (aTHX); 1070 PL_top_env = &PL_start_env;
546 JMPENV_BOOTSTRAP; 1071
1072 if (cctx->flags & CC_TRACE)
1073 PL_runops = runops_trace;
1074
1075 Zero (&myop, 1, UNOP);
1076 myop.op_next = PL_op;
1077 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1078
1079 PUSHMARK (SP);
1080 EXTEND (SP, 2);
1081 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1082 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1083 PUTBACK;
1084 PL_op = (OP *)&myop;
1085 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
547 SPAGAIN; 1086 SPAGAIN;
1087}
548 1088
549 /*PL_curcop = 0;*/ 1089/* the tail of transfer: execute stuff we can only do after a transfer */
550 SvREFCNT_dec (GvAV (PL_defgv)); 1090INLINE void
551 GvAV (PL_defgv) = ctx->args; 1091transfer_tail (pTHX)
1092{
1093 struct coro *next = (struct coro *)transfer_next;
1094 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1095 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
552 1096
1097 free_coro_mortal (aTHX);
1098 UNLOCK;
1099
1100 if (expect_false (next->throw))
1101 {
1102 SV *exception = sv_2mortal (next->throw);
1103
1104 next->throw = 0;
1105 sv_setsv (ERRSV, exception);
1106 croak (0);
1107 }
1108}
1109
1110/*
1111 * this is a _very_ stripped down perl interpreter ;)
1112 */
1113static void
1114cctx_run (void *arg)
1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1122 dTHX;
1123
1124 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */
1127
1128 /* inject a fake subroutine call to cctx_init */
1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 /* TODO: throwing an exception here might be deadly, VERIFY */
1133 transfer_tail (aTHX);
1134
1135 /* somebody or something will hit me for both perl_run and PL_restartop */
1136 PL_restartop = PL_op;
1137 perl_run (PL_curinterp);
1138
1139 /*
1140 * If perl-run returns we assume exit() was being called or the coro
1141 * fell off the end, which seems to be the only valid (non-bug)
1142 * reason for perl_run to return. We try to exit by jumping to the
1143 * bootstrap-time "top" top_env, as we cannot restore the "main"
1144 * coroutine as Coro has no such concept
1145 */
1146 PL_top_env = main_top_env;
1147 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1148 }
1149}
1150
1151static coro_cctx *
1152cctx_new ()
1153{
1154 coro_cctx *cctx;
1155
1156 ++cctx_count;
1157 New (0, cctx, 1, coro_cctx);
1158
1159 cctx->gen = cctx_gen;
1160 cctx->flags = 0;
1161 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1162
1163 return cctx;
1164}
1165
1166/* create a new cctx only suitable as source */
1167static coro_cctx *
1168cctx_new_empty ()
1169{
1170 coro_cctx *cctx = cctx_new ();
1171
1172 cctx->sptr = 0;
1173 coro_create (&cctx->cctx, 0, 0, 0, 0);
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx suitable as destination/running a perl interpreter */
1179static coro_cctx *
1180cctx_new_run ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183 void *stack_start;
1184 size_t stack_size;
1185
1186#if HAVE_MMAP
1187 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1188 /* mmap supposedly does allocate-on-write for us */
1189 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1190
1191 if (cctx->sptr != (void *)-1)
1192 {
1193 #if CORO_STACKGUARD
1194 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1195 #endif
1196 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1197 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1198 cctx->flags |= CC_MAPPED;
1199 }
1200 else
1201#endif
1202 {
1203 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1204 New (0, cctx->sptr, cctx_stacksize, long);
1205
1206 if (!cctx->sptr)
1207 {
1208 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1209 _exit (EXIT_FAILURE);
1210 }
1211
1212 stack_start = cctx->sptr;
1213 stack_size = cctx->ssize;
1214 }
1215
1216 #if CORO_USE_VALGRIND
1217 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1218 #endif
1219
1220 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1221
1222 return cctx;
1223}
1224
1225static void
1226cctx_destroy (coro_cctx *cctx)
1227{
1228 if (!cctx)
1229 return;
1230
1231 --cctx_count;
1232 coro_destroy (&cctx->cctx);
1233
1234 /* coro_transfer creates new, empty cctx's */
553 if (ctx->sptr) 1235 if (cctx->sptr)
1236 {
1237 #if CORO_USE_VALGRIND
1238 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1239 #endif
1240
1241#if HAVE_MMAP
1242 if (cctx->flags & CC_MAPPED)
1243 munmap (cctx->sptr, cctx->ssize);
1244 else
1245#endif
1246 Safefree (cctx->sptr);
554 { 1247 }
1248
1249 Safefree (cctx);
1250}
1251
1252/* wether this cctx should be destructed */
1253#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1254
1255static coro_cctx *
1256cctx_get (pTHX)
1257{
1258 while (expect_true (cctx_first))
1259 {
1260 coro_cctx *cctx = cctx_first;
1261 cctx_first = cctx->next;
1262 --cctx_idle;
1263
1264 if (expect_true (!CCTX_EXPIRED (cctx)))
1265 return cctx;
1266
1267 cctx_destroy (cctx);
1268 }
1269
1270 return cctx_new_run ();
1271}
1272
1273static void
1274cctx_put (coro_cctx *cctx)
1275{
1276 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1277
1278 /* free another cctx if overlimit */
1279 if (expect_false (cctx_idle >= cctx_max_idle))
1280 {
1281 coro_cctx *first = cctx_first;
1282 cctx_first = first->next;
1283 --cctx_idle;
1284
1285 cctx_destroy (first);
1286 }
1287
1288 ++cctx_idle;
1289 cctx->next = cctx_first;
1290 cctx_first = cctx;
1291}
1292
1293/** coroutine switching *****************************************************/
1294
1295static void
1296transfer_check (pTHX_ struct coro *prev, struct coro *next)
1297{
1298 if (expect_true (prev != next))
1299 {
1300 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1301 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1302
1303 if (expect_false (next->flags & CF_RUNNING))
1304 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1305
1306 if (expect_false (next->flags & CF_DESTROYED))
1307 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1308
1309#if !PERL_VERSION_ATLEAST (5,10,0)
1310 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1311 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1312#endif
1313 }
1314}
1315
1316/* always use the TRANSFER macro */
1317static void NOINLINE
1318transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1319{
1320 dSTACKLEVEL;
1321
1322 /* sometimes transfer is only called to set idle_sp */
1323 if (expect_false (!next))
1324 {
1325 ((coro_cctx *)prev)->idle_sp = stacklevel;
1326 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1327 }
1328 else if (expect_true (prev != next))
1329 {
1330 coro_cctx *prev__cctx;
1331
1332 if (expect_false (prev->flags & CF_NEW))
1333 {
1334 /* create a new empty/source context */
1335 prev->cctx = cctx_new_empty ();
1336 prev->flags &= ~CF_NEW;
1337 prev->flags |= CF_RUNNING;
1338 }
1339
1340 prev->flags &= ~CF_RUNNING;
1341 next->flags |= CF_RUNNING;
1342
1343 LOCK;
1344
1345 /* first get rid of the old state */
1346 save_perl (aTHX_ prev);
1347
1348 if (expect_false (next->flags & CF_NEW))
1349 {
1350 /* need to start coroutine */
1351 next->flags &= ~CF_NEW;
1352 /* setup coroutine call */
1353 coro_setup (aTHX_ next);
1354 }
1355 else
1356 load_perl (aTHX_ next);
1357
1358 prev__cctx = prev->cctx;
1359
1360 /* possibly untie and reuse the cctx */
1361 if (expect_true (
1362 prev__cctx->idle_sp == stacklevel
1363 && !(prev__cctx->flags & CC_TRACE)
1364 && !force_cctx
1365 ))
1366 {
1367 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1368 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1369
1370 prev->cctx = 0;
1371
1372 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1373 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1374 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1375 if (!next->cctx)
1376 next->cctx = cctx_get (aTHX);
1377
1378 cctx_put (prev__cctx);
1379 }
1380
1381 ++next->usecount;
1382
1383 if (expect_true (!next->cctx))
1384 next->cctx = cctx_get (aTHX);
1385
1386 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1387 transfer_next = next;
1388
1389 if (expect_false (prev__cctx != next->cctx))
1390 {
1391 prev__cctx->top_env = PL_top_env;
1392 PL_top_env = next->cctx->top_env;
1393 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1394 }
1395
1396 transfer_tail (aTHX);
1397 }
1398}
1399
1400#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1401#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1402
1403/** high level stuff ********************************************************/
1404
1405static int
1406coro_state_destroy (pTHX_ struct coro *coro)
1407{
1408 if (coro->flags & CF_DESTROYED)
1409 return 0;
1410
1411 coro->flags |= CF_DESTROYED;
1412
1413 if (coro->flags & CF_READY)
1414 {
1415 /* reduce nready, as destroying a ready coro effectively unreadies it */
1416 /* alternative: look through all ready queues and remove the coro */
1417 LOCK;
1418 --coro_nready;
1419 UNLOCK;
1420 }
1421 else
1422 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1423
1424 if (coro->mainstack && coro->mainstack != main_mainstack)
1425 {
1426 struct coro temp;
1427
1428 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1429
1430 save_perl (aTHX_ &temp);
1431 load_perl (aTHX_ coro);
1432
1433 coro_destruct (aTHX_ coro);
1434
1435 load_perl (aTHX_ &temp);
1436
1437 coro->slot = 0;
1438 }
1439
1440 cctx_destroy (coro->cctx);
1441 SvREFCNT_dec (coro->args);
1442
1443 if (coro->next) coro->next->prev = coro->prev;
1444 if (coro->prev) coro->prev->next = coro->next;
1445 if (coro == coro_first) coro_first = coro->next;
1446
1447 return 1;
1448}
1449
1450static int
1451coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1452{
1453 struct coro *coro = (struct coro *)mg->mg_ptr;
1454 mg->mg_ptr = 0;
1455
1456 coro->hv = 0;
1457
1458 if (--coro->refcnt < 0)
1459 {
1460 coro_state_destroy (aTHX_ coro);
1461 Safefree (coro);
1462 }
1463
1464 return 0;
1465}
1466
1467static int
1468coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1469{
1470 struct coro *coro = (struct coro *)mg->mg_ptr;
1471
1472 ++coro->refcnt;
1473
1474 return 0;
1475}
1476
1477static MGVTBL coro_state_vtbl = {
1478 0, 0, 0, 0,
1479 coro_state_free,
1480 0,
1481#ifdef MGf_DUP
1482 coro_state_dup,
1483#else
1484# define MGf_DUP 0
1485#endif
1486};
1487
1488static void
1489prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1490{
1491 ta->prev = SvSTATE (prev_sv);
1492 ta->next = SvSTATE (next_sv);
1493 TRANSFER_CHECK (*ta);
1494}
1495
1496static void
1497api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1498{
1499 struct coro_transfer_args ta;
1500
1501 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1502 TRANSFER (ta, 1);
1503}
1504
1505/** Coro ********************************************************************/
1506
1507static void
1508coro_enq (pTHX_ SV *coro_sv)
1509{
1510 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1511}
1512
1513static SV *
1514coro_deq (pTHX)
1515{
1516 int prio;
1517
1518 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1519 if (AvFILLp (coro_ready [prio]) >= 0)
1520 return av_shift (coro_ready [prio]);
1521
1522 return 0;
1523}
1524
1525static int
1526api_ready (pTHX_ SV *coro_sv)
1527{
1528 struct coro *coro;
1529 SV *sv_hook;
1530 void (*xs_hook)(void);
1531
1532 if (SvROK (coro_sv))
1533 coro_sv = SvRV (coro_sv);
1534
1535 coro = SvSTATE (coro_sv);
1536
1537 if (coro->flags & CF_READY)
1538 return 0;
1539
1540 coro->flags |= CF_READY;
1541
1542 LOCK;
1543
1544 sv_hook = coro_nready ? 0 : coro_readyhook;
1545 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1546
1547 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1548 ++coro_nready;
1549
1550 UNLOCK;
1551
1552 if (sv_hook)
1553 {
1554 dSP;
1555
1556 ENTER;
1557 SAVETMPS;
1558
555 PUSHMARK(SP); 1559 PUSHMARK (SP);
556 PUTBACK; 1560 PUTBACK;
557 (void) call_sv (sub_init, G_VOID|G_NOARGS); 1561 call_sv (sv_hook, G_DISCARD);
558 croak ("FATAL: CCTXT coroutine returned!"); 1562 SPAGAIN;
1563
1564 FREETMPS;
1565 LEAVE;
1566 }
1567
1568 if (xs_hook)
1569 xs_hook ();
1570
1571 return 1;
1572}
1573
1574static int
1575api_is_ready (pTHX_ SV *coro_sv)
1576{
1577 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1578}
1579
1580INLINE void
1581prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1582{
1583 SV *prev_sv, *next_sv;
1584
1585 for (;;)
1586 {
1587 LOCK;
1588 next_sv = coro_deq (aTHX);
1589
1590 /* nothing to schedule: call the idle handler */
1591 if (expect_false (!next_sv))
1592 {
1593 dSP;
1594 UNLOCK;
1595
1596 ENTER;
1597 SAVETMPS;
1598
1599 PUSHMARK (SP);
1600 PUTBACK;
1601 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1602 SPAGAIN;
1603
1604 FREETMPS;
1605 LEAVE;
1606 continue;
1607 }
1608
1609 ta->next = SvSTATE (next_sv);
1610
1611 /* cannot transfer to destroyed coros, skip and look for next */
1612 if (expect_false (ta->next->flags & CF_DESTROYED))
1613 {
1614 UNLOCK;
1615 SvREFCNT_dec (next_sv);
1616 /* coro_nready has already been taken care of by destroy */
1617 continue;
1618 }
1619
1620 --coro_nready;
1621 UNLOCK;
1622 break;
1623 }
1624
1625 /* free this only after the transfer */
1626 prev_sv = SvRV (coro_current);
1627 ta->prev = SvSTATE (prev_sv);
1628 TRANSFER_CHECK (*ta);
1629 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1630 ta->next->flags &= ~CF_READY;
1631 SvRV_set (coro_current, next_sv);
1632
1633 LOCK;
1634 free_coro_mortal (aTHX);
1635 coro_mortal = prev_sv;
1636 UNLOCK;
1637}
1638
1639INLINE void
1640prepare_cede (pTHX_ struct coro_transfer_args *ta)
1641{
1642 api_ready (aTHX_ coro_current);
1643 prepare_schedule (aTHX_ ta);
1644}
1645
1646INLINE void
1647prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1648{
1649 SV *prev = SvRV (coro_current);
1650
1651 if (coro_nready)
1652 {
1653 prepare_schedule (aTHX_ ta);
1654 api_ready (aTHX_ prev);
559 } 1655 }
560 else 1656 else
1657 prepare_nop (aTHX_ ta);
1658}
1659
1660static void
1661api_schedule (pTHX)
1662{
1663 struct coro_transfer_args ta;
1664
1665 prepare_schedule (aTHX_ &ta);
1666 TRANSFER (ta, 1);
1667}
1668
1669static int
1670api_cede (pTHX)
1671{
1672 struct coro_transfer_args ta;
1673
1674 prepare_cede (aTHX_ &ta);
1675
1676 if (expect_true (ta.prev != ta.next))
1677 {
1678 TRANSFER (ta, 1);
1679 return 1;
561 { 1680 }
562 UNOP myop; 1681 else
1682 return 0;
1683}
563 1684
564 PL_op = (OP *)&myop; 1685static int
1686api_cede_notself (pTHX)
1687{
1688 if (coro_nready)
1689 {
1690 struct coro_transfer_args ta;
565 1691
566 Zero(&myop, 1, UNOP); 1692 prepare_cede_notself (aTHX_ &ta);
567 myop.op_next = Nullop; 1693 TRANSFER (ta, 1);
568 myop.op_flags = OPf_WANT_VOID; 1694 return 1;
1695 }
1696 else
1697 return 0;
1698}
569 1699
1700static void
1701api_trace (pTHX_ SV *coro_sv, int flags)
1702{
1703 struct coro *coro = SvSTATE (coro_sv);
1704
1705 if (flags & CC_TRACE)
1706 {
1707 if (!coro->cctx)
1708 coro->cctx = cctx_new_run ();
1709 else if (!(coro->cctx->flags & CC_TRACE))
1710 croak ("cannot enable tracing on coroutine with custom stack,");
1711
1712 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1713 }
1714 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1715 {
1716 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1717
1718 if (coro->flags & CF_RUNNING)
1719 PL_runops = RUNOPS_DEFAULT;
1720 else
1721 coro->slot->runops = RUNOPS_DEFAULT;
1722 }
1723}
1724
1725#if 0
1726static int
1727coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1728{
1729 AV *padlist;
1730 AV *av = (AV *)mg->mg_obj;
1731
1732 abort ();
1733
1734 return 0;
1735}
1736
1737static MGVTBL coro_gensub_vtbl = {
1738 0, 0, 0, 0,
1739 coro_gensub_free
1740};
1741#endif
1742
1743/*****************************************************************************/
1744/* PerlIO::cede */
1745
1746typedef struct
1747{
1748 PerlIOBuf base;
1749 NV next, every;
1750} PerlIOCede;
1751
1752static IV
1753PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1754{
1755 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1756
1757 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1758 self->next = nvtime () + self->every;
1759
1760 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1761}
1762
1763static SV *
1764PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1765{
1766 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1767
1768 return newSVnv (self->every);
1769}
1770
1771static IV
1772PerlIOCede_flush (pTHX_ PerlIO *f)
1773{
1774 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1775 double now = nvtime ();
1776
1777 if (now >= self->next)
1778 {
1779 api_cede (aTHX);
1780 self->next = now + self->every;
1781 }
1782
1783 return PerlIOBuf_flush (aTHX_ f);
1784}
1785
1786static PerlIO_funcs PerlIO_cede =
1787{
1788 sizeof(PerlIO_funcs),
1789 "cede",
1790 sizeof(PerlIOCede),
1791 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1792 PerlIOCede_pushed,
1793 PerlIOBuf_popped,
1794 PerlIOBuf_open,
1795 PerlIOBase_binmode,
1796 PerlIOCede_getarg,
1797 PerlIOBase_fileno,
1798 PerlIOBuf_dup,
1799 PerlIOBuf_read,
1800 PerlIOBuf_unread,
1801 PerlIOBuf_write,
1802 PerlIOBuf_seek,
1803 PerlIOBuf_tell,
1804 PerlIOBuf_close,
1805 PerlIOCede_flush,
1806 PerlIOBuf_fill,
1807 PerlIOBase_eof,
1808 PerlIOBase_error,
1809 PerlIOBase_clearerr,
1810 PerlIOBase_setlinebuf,
1811 PerlIOBuf_get_base,
1812 PerlIOBuf_bufsiz,
1813 PerlIOBuf_get_ptr,
1814 PerlIOBuf_get_cnt,
1815 PerlIOBuf_set_ptrcnt,
1816};
1817
1818/*****************************************************************************/
1819
1820static const CV *slf_cv; /* for quick consistency check */
1821
1822static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1823static SV *slf_arg0;
1824static SV *slf_arg1;
1825static SV *slf_arg2;
1826
1827/* this restores the stack in the case we patched the entersub, to */
1828/* recreate the stack frame as perl will on following calls */
1829/* since entersub cleared the stack */
1830static OP *
1831pp_restore (pTHX)
1832{
1833 dSP;
1834
570 PUSHMARK(SP); 1835 PUSHMARK (SP);
571 XPUSHs (sub_init); 1836
572 /* 1837 EXTEND (SP, 3);
573 * the next line is slightly wrong, as PL_op->op_next 1838 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
574 * is actually being executed so we skip the first op. 1839 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
575 * that doesn't matter, though, since it is only 1840 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
576 * pp_nextstate and we never return... 1841 PUSHs ((SV *)CvGV (slf_cv));
577 * ah yes, and I don't care anyways ;) 1842
1843 RETURNOP (slf_restore.op_first);
1844}
1845
1846static void
1847slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1848{
1849 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1850}
1851
1852static void
1853slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1854{
1855 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1856
1857 frame->prepare = slf_prepare_set_stacklevel;
1858 frame->check = slf_check_nop;
1859 frame->data = (void *)SvIV (arg [0]);
1860}
1861
1862static void
1863slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1864{
1865 SV **arg = (SV **)slf_frame.data;
1866
1867 prepare_transfer (ta, arg [0], arg [1]);
1868}
1869
1870static void
1871slf_init_transfer (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1872{
1873 if (items != 2)
1874 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1875
1876 frame->prepare = slf_prepare_transfer;
1877 frame->check = slf_check_nop;
1878 frame->data = (void *)arg; /* let's hope it will stay valid */
1879}
1880
1881static void
1882slf_init_schedule (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1883{
1884 frame->prepare = prepare_schedule;
1885 frame->check = slf_check_nop;
1886}
1887
1888static void
1889slf_init_cede (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1890{
1891 frame->prepare = prepare_cede;
1892 frame->check = slf_check_nop;
1893}
1894
1895static void
1896slf_init_cede_notself (pTHX_ struct CoroSLF *frame, SV **arg, int items)
1897{
1898 frame->prepare = prepare_cede_notself;
1899 frame->check = slf_check_nop;
1900}
1901
1902/* we hijack an hopefully unused CV flag for our purposes */
1903#define CVf_SLF 0x4000
1904
1905/*
1906 * these not obviously related functions are all rolled into one
1907 * function to increase chances that they all will call transfer with the same
1908 * stack offset
1909 * SLF stands for "schedule-like-function".
1910 */
1911static OP *
1912pp_slf (pTHX)
1913{
1914 I32 checkmark; /* mark SP to see how many elements check has pushed */
1915
1916 /* set up the slf frame, unless it has already been set-up */
1917 /* the latter happens when a new coro has been started */
1918 /* or when a new cctx was attached to an existing coroutine */
1919 if (expect_true (!slf_frame.prepare))
1920 {
1921 /* first iteration */
1922 dSP;
1923 SV **arg = PL_stack_base + TOPMARK + 1;
1924 int items = SP - arg; /* args without function object */
1925 SV *gv = *sp;
1926
1927 /* do a quick consistency check on the "function" object, and if it isn't */
1928 /* for us, divert to the real entersub */
1929 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1930 return PL_ppaddr[OP_ENTERSUB](aTHX);
1931
1932 /* pop args */
1933 SP = PL_stack_base + POPMARK;
1934
1935 if (!(PL_op->op_flags & OPf_STACKED))
578 */ 1936 {
1937 /* ampersand-form of call, use @_ instead of stack */
1938 AV *av = GvAV (PL_defgv);
1939 arg = AvARRAY (av);
1940 items = AvFILLp (av) + 1;
1941 }
1942
579 PUTBACK; 1943 PUTBACK;
580 PL_op = pp_entersub();
581 SPAGAIN;
582 1944
583 ENTER; /* necessary e.g. for dounwind */ 1945 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr) (aTHX_ &slf_frame, arg, items);
1946 }
1947
1948 /* now interpret the slf_frame */
1949 /* we use a callback system not to make the code needlessly */
1950 /* complicated, but so we can run multiple perl coros from one cctx */
1951
1952 do
584 } 1953 {
585} 1954 struct coro_transfer_args ta;
586 1955
587STATIC void 1956 slf_frame.prepare (aTHX_ &ta);
588transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 1957 TRANSFER (ta, 0);
589{ 1958
1959 checkmark = PL_stack_sp - PL_stack_base;
1960 }
1961 while (slf_frame.check (aTHX_ &slf_frame));
1962
1963 {
590 dSP; 1964 dSP;
1965 SV **bot = PL_stack_base + checkmark;
1966 int gimme = GIMME_V;
591 1967
592 if (prev != next) 1968 slf_frame.prepare = 0; /* signal pp_slf that we need a new frame */
1969
1970 /* make sure we put something on the stack in scalar context */
1971 if (gimme == G_SCALAR)
593 { 1972 {
1973 if (sp == bot)
1974 XPUSHs (&PL_sv_undef);
1975
1976 SP = bot + 1;
594 /* 1977 }
595 * this could be done in newprocess which would lead to 1978
596 * extremely elegant and fast (basically just SAVE/LOAD) 1979 PUTBACK;
597 * code here, but lazy allocation of stacks has also 1980 }
598 * some virtues and the overhead of the if() is nil. 1981
599 */ 1982 return NORMAL;
600 if (next->mainstack) 1983}
1984
1985static void
1986api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1987{
1988 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1989
1990 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1991 && PL_op->op_ppaddr != pp_slf)
1992 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1993
1994 if (items > 3)
1995 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1996
1997 CvFLAGS (cv) |= CVf_SLF;
1998 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1999 slf_cv = cv;
2000
2001 /* we patch the op, and then re-run the whole call */
2002 /* we have to put the same argument on the stack for this to work */
2003 /* and this will be done by pp_restore */
2004 slf_restore.op_next = (OP *)&slf_restore;
2005 slf_restore.op_type = OP_NULL;
2006 slf_restore.op_ppaddr = pp_restore;
2007 slf_restore.op_first = PL_op;
2008
2009 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
2010 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
2011 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
2012
2013 PL_op->op_ppaddr = pp_slf;
2014
2015 PL_op = (OP *)&slf_restore;
2016}
2017
2018/*****************************************************************************/
2019
2020static int
2021slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2022{
2023 AV *av = (AV *)frame->data;
2024 SV *count_sv = AvARRAY (av)[0];
2025
2026 if (SvIVX (count_sv) > 0)
2027 {
2028 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2029 return 0;
2030 }
2031 else
2032 {
2033 int i;
2034 /* if we were woken up but can't down, we look through the whole */
2035 /* waiters list and only add us if we aren't in there already */
2036 /* this avoids some degenerate memory usage cases */
2037
2038 for (i = 1; i <= AvFILLp (av); ++i)
2039 if (AvARRAY (av)[i] == SvRV (coro_current))
2040 return 1;
2041
2042 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2043 return 1;
2044 }
2045}
2046
2047static void
2048slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, SV **arg, int items)
2049{
2050 AV *av = (AV *)SvRV (arg [0]);
2051
2052 if (SvIVX (AvARRAY (av)[0]) > 0)
2053 {
2054 frame->data = (void *)av;
2055 frame->prepare = prepare_nop;
2056 }
2057 else
2058 {
2059 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2060
2061 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2062 frame->prepare = prepare_schedule;
2063 }
2064
2065 frame->check = slf_check_semaphore_down;
2066
2067}
2068
2069MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
2070
2071PROTOTYPES: DISABLE
2072
2073BOOT:
2074{
2075#ifdef USE_ITHREADS
2076 MUTEX_INIT (&coro_lock);
2077# if CORO_PTHREAD
2078 coro_thx = PERL_GET_CONTEXT;
2079# endif
2080#endif
2081 BOOT_PAGESIZE;
2082
2083 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2084 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2085
2086 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2087 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2088 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2089
2090 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2091 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2092 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2093
2094 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
2095
2096 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
2097 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
2098 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2099 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
2100
2101 main_mainstack = PL_mainstack;
2102 main_top_env = PL_top_env;
2103
2104 while (main_top_env->je_prev)
2105 main_top_env = main_top_env->je_prev;
2106
2107 coroapi.ver = CORO_API_VERSION;
2108 coroapi.rev = CORO_API_REVISION;
2109
2110 coroapi.transfer = api_transfer;
2111
2112 coroapi.sv_state = SvSTATE_;
2113 coroapi.execute_slf = api_execute_slf;
2114 coroapi.prepare_nop = prepare_nop;
2115 coroapi.prepare_schedule = prepare_schedule;
2116 coroapi.prepare_cede = prepare_cede;
2117 coroapi.prepare_cede_notself = prepare_cede_notself;
2118
601 { 2119 {
602 SAVE (prev, flags); 2120 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
603 LOAD (next);
604 2121
605 /* mark this state as in-use */ 2122 if (!svp) croak ("Time::HiRes is required");
606 next->mainstack = 0; 2123 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
607 next->tmps_ix = -2;
608 2124
609 if (flags & TRANSFER_SAVE_CCTXT) 2125 nvtime = INT2PTR (double (*)(), SvIV (*svp));
610 {
611 if (!next->ssize)
612 croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
613
614 if (!prev->ssize)
615 prev->ssize = 1; /* mark cctx as valid ;) */
616
617 coro_transfer (&(prev->cctx), &(next->cctx));
618 }
619
620 } 2126 }
621 else if (next->tmps_ix == -2)
622 croak ("tried to transfer to running coroutine");
623 else
624 {
625 SAVE (prev, -1); /* first get rid of the old state */
626 2127
627 if (flags & TRANSFER_SAVE_CCTXT) 2128 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
628 {
629 if (!next->ssize)
630 {
631 allocate_stack (next);
632 coro_create (&(next->cctx),
633 setup_coro, (void *)next,
634 next->sptr, next->ssize);
635 }
636
637 if (!prev->ssize)
638 prev->ssize = 1; /* mark cctx as valid ;) */
639
640 coro_transfer (&(prev->cctx), &(next->cctx));
641 }
642 else
643 setup_coro (next);
644 }
645 }
646} 2129}
647 2130
648MODULE = Coro::State PACKAGE = Coro::State 2131SV *
649 2132new (char *klass, ...)
650PROTOTYPES: ENABLE
651
652BOOT:
653{ /* {} necessary for stoopid perl-5.6.x */
654 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
655 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
656 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
657
658 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
659 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
660 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
661 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
662
663 if (!padlist_cache)
664 padlist_cache = newHV ();
665
666 main_mainstack = PL_mainstack;
667}
668
669Coro::State
670_newprocess(args)
671 SV * args
672 PROTOTYPE: $
673 CODE: 2133 CODE:
674 Coro__State coro; 2134{
2135 struct coro *coro;
2136 MAGIC *mg;
2137 HV *hv;
2138 int i;
675 2139
676 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
677 croak ("Coro::State::_newprocess expects an arrayref");
678
679 New (0, coro, 1, struct coro); 2140 Newz (0, coro, 1, struct coro);
2141 coro->args = newAV ();
2142 coro->flags = CF_NEW;
680 2143
681 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2144 if (coro_first) coro_first->prev = coro;
682 coro->mainstack = 0; /* actual work is done inside transfer */ 2145 coro->next = coro_first;
683 coro->sptr = 0; 2146 coro_first = coro;
684 coro->ssize = 0;
685 2147
686 RETVAL = coro; 2148 coro->hv = hv = newHV ();
2149 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2150 mg->mg_flags |= MGf_DUP;
2151 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2152
2153 av_extend (coro->args, items - 1);
2154 for (i = 1; i < items; i++)
2155 av_push (coro->args, newSVsv (ST (i)));
2156}
687 OUTPUT: 2157 OUTPUT:
688 RETVAL 2158 RETVAL
689 2159
690void 2160void
691transfer(prev, next, flags = TRANSFER_SAVE_ALL) 2161_set_stacklevel (...)
692 Coro::State_or_hashref prev 2162 CODE:
693 Coro::State_or_hashref next 2163 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
694 int flags
695 PROTOTYPE: @
696 CODE:
697 transfer (aTHX_ prev, next, flags);
698 2164
699void 2165void
700DESTROY(coro) 2166transfer (...)
701 Coro::State coro 2167 PROTOTYPE: $$
702 CODE: 2168 CODE:
2169 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
703 2170
704 if (coro->mainstack && coro->mainstack != main_mainstack) 2171bool
2172_destroy (SV *coro_sv)
2173 CODE:
2174 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2175 OUTPUT:
2176 RETVAL
2177
2178void
2179_exit (int code)
2180 PROTOTYPE: $
2181 CODE:
2182 _exit (code);
2183
2184int
2185cctx_stacksize (int new_stacksize = 0)
2186 PROTOTYPE: ;$
2187 CODE:
2188 RETVAL = cctx_stacksize;
2189 if (new_stacksize)
2190 {
2191 cctx_stacksize = new_stacksize;
2192 ++cctx_gen;
2193 }
2194 OUTPUT:
2195 RETVAL
2196
2197int
2198cctx_max_idle (int max_idle = 0)
2199 PROTOTYPE: ;$
2200 CODE:
2201 RETVAL = cctx_max_idle;
2202 if (max_idle > 1)
2203 cctx_max_idle = max_idle;
2204 OUTPUT:
2205 RETVAL
2206
2207int
2208cctx_count ()
2209 PROTOTYPE:
2210 CODE:
2211 RETVAL = cctx_count;
2212 OUTPUT:
2213 RETVAL
2214
2215int
2216cctx_idle ()
2217 PROTOTYPE:
2218 CODE:
2219 RETVAL = cctx_idle;
2220 OUTPUT:
2221 RETVAL
2222
2223void
2224list ()
2225 PROTOTYPE:
2226 PPCODE:
2227{
2228 struct coro *coro;
2229 for (coro = coro_first; coro; coro = coro->next)
2230 if (coro->hv)
2231 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2232}
2233
2234void
2235call (Coro::State coro, SV *coderef)
2236 ALIAS:
2237 eval = 1
2238 CODE:
2239{
2240 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
705 { 2241 {
706 struct coro temp; 2242 struct coro temp;
707 2243
708 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2244 if (!(coro->flags & CF_RUNNING))
709 LOAD(aTHX_ coro); 2245 {
2246 PUTBACK;
2247 save_perl (aTHX_ &temp);
2248 load_perl (aTHX_ coro);
2249 }
710 2250
711 destroy_stacks (aTHX); 2251 {
2252 dSP;
2253 ENTER;
2254 SAVETMPS;
2255 PUTBACK;
2256 PUSHSTACK;
2257 PUSHMARK (SP);
712 2258
713 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2259 if (ix)
2260 eval_sv (coderef, 0);
2261 else
2262 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
714 2263
715 coro->mainstack = 0; 2264 POPSTACK;
2265 SPAGAIN;
2266 FREETMPS;
2267 LEAVE;
2268 PUTBACK;
2269 }
2270
2271 if (!(coro->flags & CF_RUNNING))
2272 {
2273 save_perl (aTHX_ coro);
2274 load_perl (aTHX_ &temp);
2275 SPAGAIN;
2276 }
716 } 2277 }
2278}
717 2279
718 if (coro->sptr) 2280SV *
2281is_ready (Coro::State coro)
2282 PROTOTYPE: $
2283 ALIAS:
2284 is_ready = CF_READY
2285 is_running = CF_RUNNING
2286 is_new = CF_NEW
2287 is_destroyed = CF_DESTROYED
2288 CODE:
2289 RETVAL = boolSV (coro->flags & ix);
2290 OUTPUT:
2291 RETVAL
2292
2293void
2294throw (Coro::State self, SV *throw = &PL_sv_undef)
2295 PROTOTYPE: $;$
2296 CODE:
2297 SvREFCNT_dec (self->throw);
2298 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2299
2300void
2301api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2302 PROTOTYPE: $;$
2303 C_ARGS: aTHX_ coro, flags
2304
2305SV *
2306has_cctx (Coro::State coro)
2307 PROTOTYPE: $
2308 CODE:
2309 RETVAL = boolSV (!!coro->cctx);
2310 OUTPUT:
2311 RETVAL
2312
2313int
2314is_traced (Coro::State coro)
2315 PROTOTYPE: $
2316 CODE:
2317 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2318 OUTPUT:
2319 RETVAL
2320
2321UV
2322rss (Coro::State coro)
2323 PROTOTYPE: $
2324 ALIAS:
2325 usecount = 1
2326 CODE:
2327 switch (ix)
2328 {
2329 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2330 case 1: RETVAL = coro->usecount; break;
2331 }
2332 OUTPUT:
2333 RETVAL
2334
2335void
2336force_cctx ()
2337 PROTOTYPE:
2338 CODE:
2339 struct coro *coro = SvSTATE (coro_current);
2340 coro->cctx->idle_sp = 0;
2341
2342void
2343swap_defsv (Coro::State self)
2344 PROTOTYPE: $
2345 ALIAS:
2346 swap_defav = 1
2347 CODE:
2348 if (!self->slot)
2349 croak ("cannot swap state with coroutine that has no saved state,");
2350 else
719 { 2351 {
720 deallocate_stack (coro); 2352 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
721 coro->sptr = 0; 2353 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2354
2355 SV *tmp = *src; *src = *dst; *dst = tmp;
722 } 2356 }
723 2357
724 Safefree (coro); 2358MODULE = Coro::State PACKAGE = Coro
2359
2360BOOT:
2361{
2362 int i;
2363
2364 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2365 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2366 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2367
2368 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2369 SvREADONLY_on (coro_current);
2370
2371 coro_stash = gv_stashpv ("Coro", TRUE);
2372
2373 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2374 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2375 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2376 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2377 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2378 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2379
2380 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2381 coro_ready[i] = newAV ();
2382
2383 {
2384 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2385
2386 coroapi.schedule = api_schedule;
2387 coroapi.cede = api_cede;
2388 coroapi.cede_notself = api_cede_notself;
2389 coroapi.ready = api_ready;
2390 coroapi.is_ready = api_is_ready;
2391 coroapi.nready = coro_nready;
2392 coroapi.current = coro_current;
2393
2394 GCoroAPI = &coroapi;
2395 sv_setiv (sv, (IV)&coroapi);
2396 SvREADONLY_on (sv);
2397 }
2398}
725 2399
726void 2400void
727flush() 2401schedule (...)
728 CODE: 2402 CODE:
729#ifdef MAY_FLUSH 2403 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
730 flush_padlist_cache ();
731#endif
732
733MODULE = Coro::State PACKAGE = Coro::Cont
734
735# this is slightly dirty
736 2404
737void 2405void
738yield(...) 2406cede (...)
2407 CODE:
2408 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2409
2410void
2411cede_notself (...)
2412 CODE:
2413 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2414
2415void
2416_set_current (SV *current)
2417 PROTOTYPE: $
2418 CODE:
2419 SvREFCNT_dec (SvRV (coro_current));
2420 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2421
2422void
2423_set_readyhook (SV *hook)
2424 PROTOTYPE: $
2425 CODE:
2426 LOCK;
2427 SvREFCNT_dec (coro_readyhook);
2428 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2429 UNLOCK;
2430
2431int
2432prio (Coro::State coro, int newprio = 0)
2433 PROTOTYPE: $;$
2434 ALIAS:
2435 nice = 1
2436 CODE:
2437{
2438 RETVAL = coro->prio;
2439
2440 if (items > 1)
2441 {
2442 if (ix)
2443 newprio = coro->prio - newprio;
2444
2445 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2446 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2447
2448 coro->prio = newprio;
2449 }
2450}
2451 OUTPUT:
2452 RETVAL
2453
2454SV *
2455ready (SV *self)
2456 PROTOTYPE: $
2457 CODE:
2458 RETVAL = boolSV (api_ready (aTHX_ self));
2459 OUTPUT:
2460 RETVAL
2461
2462int
2463nready (...)
2464 PROTOTYPE:
2465 CODE:
2466 RETVAL = coro_nready;
2467 OUTPUT:
2468 RETVAL
2469
2470# for async_pool speedup
2471void
2472_pool_1 (SV *cb)
2473 CODE:
2474{
2475 struct coro *coro = SvSTATE (coro_current);
2476 HV *hv = (HV *)SvRV (coro_current);
2477 AV *defav = GvAV (PL_defgv);
2478 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2479 AV *invoke_av;
2480 int i, len;
2481
2482 if (!invoke)
2483 {
2484 SV *old = PL_diehook;
2485 PL_diehook = 0;
2486 SvREFCNT_dec (old);
2487 croak ("\3async_pool terminate\2\n");
2488 }
2489
2490 SvREFCNT_dec (coro->saved_deffh);
2491 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2492
2493 hv_store (hv, "desc", sizeof ("desc") - 1,
2494 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2495
2496 invoke_av = (AV *)SvRV (invoke);
2497 len = av_len (invoke_av);
2498
2499 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2500
2501 if (len > 0)
2502 {
2503 av_fill (defav, len - 1);
2504 for (i = 0; i < len; ++i)
2505 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2506 }
2507}
2508
2509void
2510_pool_2 (SV *cb)
2511 CODE:
2512{
2513 struct coro *coro = SvSTATE (coro_current);
2514
2515 sv_setsv (cb, &PL_sv_undef);
2516
2517 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2518 coro->saved_deffh = 0;
2519
2520 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2521 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2522 {
2523 SV *old = PL_diehook;
2524 PL_diehook = 0;
2525 SvREFCNT_dec (old);
2526 croak ("\3async_pool terminate\2\n");
2527 }
2528
2529 av_clear (GvAV (PL_defgv));
2530 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2531 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2532
2533 coro->prio = 0;
2534
2535 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2536 api_trace (aTHX_ coro_current, 0);
2537
2538 av_push (av_async_pool, newSVsv (coro_current));
2539}
2540
2541#if 0
2542
2543void
2544_generator_call (...)
739 PROTOTYPE: @ 2545 PROTOTYPE: @
2546 PPCODE:
2547 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2548 xxxx
2549 abort ();
2550
2551SV *
2552gensub (SV *sub, ...)
2553 PROTOTYPE: &;@
740 CODE: 2554 CODE:
741 static SV *returnstk; 2555{
2556 struct coro *coro;
2557 MAGIC *mg;
742 SV *sv; 2558 CV *xcv;
2559 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2560 int i;
2561
2562 CvGV (ncv) = CvGV (cv);
2563 CvFILE (ncv) = CvFILE (cv);
2564
2565 Newz (0, coro, 1, struct coro);
2566 coro->args = newAV ();
2567 coro->flags = CF_NEW;
2568
2569 av_extend (coro->args, items - 1);
2570 for (i = 1; i < items; i++)
2571 av_push (coro->args, newSVsv (ST (i)));
2572
2573 CvISXSUB_on (ncv);
2574 CvXSUBANY (ncv).any_ptr = (void *)coro;
2575
2576 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2577
2578 CvXSUB (ncv) = CvXSUB (xcv);
2579 CvANON_on (ncv);
2580
2581 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2582 RETVAL = newRV_noinc ((SV *)ncv);
2583}
2584 OUTPUT:
2585 RETVAL
2586
2587#endif
2588
2589
2590MODULE = Coro::State PACKAGE = Coro::AIO
2591
2592void
2593_get_state (SV *self)
2594 PROTOTYPE: $
2595 PPCODE:
2596{
743 AV *defav = GvAV (PL_defgv); 2597 AV *defav = GvAV (PL_defgv);
744 struct coro *prev, *next; 2598 AV *av = newAV ();
2599 int i;
2600 SV *data_sv = newSV (sizeof (struct io_state));
2601 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2602 SvCUR_set (data_sv, sizeof (struct io_state));
2603 SvPOK_only (data_sv);
745 2604
746 if (!returnstk) 2605 data->errorno = errno;
747 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2606 data->laststype = PL_laststype;
2607 data->laststatval = PL_laststatval;
2608 data->statcache = PL_statcache;
748 2609
749 /* set up @_ -- ugly */ 2610 av_extend (av, AvFILLp (defav) + 1 + 1);
750 av_clear (defav);
751 av_fill (defav, items - 1);
752 while (items--)
753 av_store (defav, items, SvREFCNT_inc (ST(items)));
754 2611
755 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 2612 for (i = 0; i <= AvFILLp (defav); ++i)
756 sv = av_pop ((AV *)SvRV (returnstk)); 2613 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
757 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); 2614
758 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); 2615 av_push (av, data_sv);
2616
2617 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2618
2619 api_ready (aTHX_ self);
2620}
2621
2622void
2623_set_state (SV *state)
2624 PROTOTYPE: $
2625 PPCODE:
2626{
2627 AV *av = (AV *)SvRV (state);
2628 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2629 int i;
2630
2631 errno = data->errorno;
2632 PL_laststype = data->laststype;
2633 PL_laststatval = data->laststatval;
2634 PL_statcache = data->statcache;
2635
2636 EXTEND (SP, AvFILLp (av));
2637 for (i = 0; i < AvFILLp (av); ++i)
2638 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2639}
2640
2641
2642MODULE = Coro::State PACKAGE = Coro::AnyEvent
2643
2644BOOT:
2645 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2646
2647SV *
2648_schedule (...)
2649 CODE:
2650{
2651 static int incede;
2652
2653 api_cede_notself (aTHX);
2654
2655 ++incede;
2656 while (coro_nready >= incede && api_cede (aTHX))
2657 ;
2658
2659 sv_setsv (sv_activity, &PL_sv_undef);
2660 if (coro_nready >= incede)
2661 {
2662 PUSHMARK (SP);
2663 PUTBACK;
2664 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2665 SPAGAIN;
2666 }
2667
2668 --incede;
2669}
2670
2671
2672MODULE = Coro::State PACKAGE = PerlIO::cede
2673
2674BOOT:
2675 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2676
2677MODULE = Coro::State PACKAGE = Coro::Semaphore
2678
2679SV *
2680new (SV *klass, SV *count_ = 0)
2681 CODE:
2682{
2683 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2684 AV *av = newAV ();
2685 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2686 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2687}
2688 OUTPUT:
2689 RETVAL
2690
2691SV *
2692count (SV *self)
2693 CODE:
2694 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2695 OUTPUT:
2696 RETVAL
2697
2698void
2699up (SV *self, int adjust = 1)
2700 ALIAS:
2701 adjust = 1
2702 CODE:
2703{
2704 AV *av = (AV *)SvRV (self);
2705 SV *count_sv = AvARRAY (av)[0];
2706 IV count = SvIVX (count_sv);
2707
2708 count += ix ? adjust : 1;
2709 SvIVX (count_sv) = count;
2710
2711 /* now wake up as many waiters as possible */
2712 while (count > 0 && AvFILLp (av) >= count)
2713 {
2714 SV *cb;
2715
2716 /* swap first two elements so we can shift a waiter */
2717 AvARRAY (av)[0] = AvARRAY (av)[1];
2718 AvARRAY (av)[1] = count_sv;
2719 cb = av_shift (av);
2720
2721 if (SvOBJECT (cb))
2722 api_ready (cb);
2723 else
2724 croak ("callbacks not yet supported");
2725
759 SvREFCNT_dec (sv); 2726 SvREFCNT_dec (cb);
2727 }
2728}
760 2729
761 transfer(aTHX_ prev, next, 0); 2730void
2731down (SV *self)
2732 CODE:
2733 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
762 2734
2735void
2736try (SV *self)
2737 PPCODE:
2738{
2739 AV *av = (AV *)SvRV (self);
2740 SV *count_sv = AvARRAY (av)[0];
2741 IV count = SvIVX (count_sv);
2742
2743 if (count > 0)
2744 {
2745 --count;
2746 SvIVX (count_sv) = count;
2747 XSRETURN_YES;
2748 }
2749 else
2750 XSRETURN_NO;
2751}
2752
2753void
2754waiters (SV *self)
2755 CODE:
2756{
2757 AV *av = (AV *)SvRV (self);
2758
2759 if (GIMME_V == G_SCALAR)
2760 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2761 else
2762 {
2763 int i;
2764 EXTEND (SP, AvFILLp (av) + 1 - 1);
2765 for (i = 1; i <= AvFILLp (av); ++i)
2766 PUSHs (newSVsv (AvARRAY (av)[i]));
2767 }
2768}
2769

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