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Comparing Coro/Coro/State.xs (file contents):
Revision 1.27 by root, Mon Aug 20 16:58:19 2001 UTC vs.
Revision 1.180 by root, Wed Oct 3 17:12:20 2007 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4
1#include "EXTERN.h" 5#include "EXTERN.h"
2#include "perl.h" 6#include "perl.h"
3#include "XSUB.h" 7#include "XSUB.h"
4 8
5#include "libcoro/coro.c" 9#include "patchlevel.h"
6 10
7#include <signal.h> 11#include <stdio.h>
12#include <errno.h>
13#include <assert.h>
8 14
9#ifdef HAVE_MMAP 15#ifdef HAVE_MMAP
10# include <unistd.h> 16# include <unistd.h>
11# include <sys/mman.h> 17# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 18# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
15# else 21# else
16# undef HAVE_MMAP 22# undef HAVE_MMAP
17# endif 23# endif
18# endif 24# endif
25# include <limits.h>
26# ifndef PAGESIZE
27# define PAGESIZE pagesize
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
29static long pagesize;
30# else
31# define BOOT_PAGESIZE (void)0
19#endif 32# endif
33#else
34# define PAGESIZE 0
35# define BOOT_PAGESIZE (void)0
36#endif
20 37
21#define MAY_FLUSH /* increases codesize */ 38#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif
22 44
23#define SUB_INIT "Coro::State::initialize" 45/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 46#define MAX_IDLE_CCTX 8
25 47
26/* The next macro should delcare a variable stacklevel that contains and approximation 48#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 49 (PERL_REVISION > (a) \
28 * and should be unique. */ 50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
74
75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
79
80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD
82#endif
83
84#ifndef CORO_STACKGUARD
85# define CORO_STACKGUARD 0
86#endif
87
88/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif
92
93/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 96#define STACKLEVEL ((void *)&stacklevel)
30 97
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 98#define IN_DESTRUCT (PL_main_cv == Nullcv)
99
100#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory")
103#else
104# define attribute(x)
105# define BARRIER
106#endif
107
108#define NOINLINE attribute ((noinline))
32 109
33#include "CoroAPI.h" 110#include "CoroAPI.h"
34 111
112#ifdef USE_ITHREADS
113static perl_mutex coro_mutex;
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif
120
121/* helper storage struct for Coro::AIO */
122struct io_state
123{
124 int errorno;
125 I32 laststype;
126 int laststatval;
127 Stat_t statcache;
128};
129
130static size_t coro_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 131static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */
36 136
37/* this is actually not only the c stack but also c registers etc... */ 137static GV *irsgv; /* $/ */
138
139/* async_pool helper stuff */
140static SV *sv_pool_rss;
141static SV *sv_pool_size;
142static AV *av_async_pool;
143
144static struct coro_cctx *cctx_first;
145static int cctx_count, cctx_idle;
146
147enum {
148 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154};
155
156/* this is a structure representing a c-level coroutine */
38typedef struct { 157typedef struct coro_cctx {
39 int refcnt; /* pointer reference counter */ 158 struct coro_cctx *next;
40 int usecnt; /* shared by how many coroutines */
41 int gencnt; /* generation counter */
42 159
160 /* the stack */
161 void *sptr;
162 size_t ssize;
163
164 /* cpu state */
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
167 JMPENV *top_env;
43 coro_context cctx; 168 coro_context cctx;
44 169
45 void *sptr; 170#if CORO_USE_VALGRIND
46 long ssize; /* positive == mmap, otherwise malloc */ 171 int valgrind_id;
47} coro_stack; 172#endif
173 unsigned char flags;
174} coro_cctx;
48 175
176enum {
177 CF_RUNNING = 0x0001, /* coroutine is running */
178 CF_READY = 0x0002, /* coroutine is ready */
179 CF_NEW = 0x0004, /* has never been switched to */
180 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
181};
182
183/* this is a structure representing a perl-level coroutine */
49struct coro { 184struct coro {
50 /* the optional C context */ 185 /* the c coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 186 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54
55 /* optionally saved, might be zero */
56 AV *defav;
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63
64 /* the stacks and related info (callchain etc..) */
65 PERL_SI *curstackinfo;
66 AV *curstack;
67 AV *mainstack;
68 SV **stack_sp;
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 187
92 /* data associated with this coroutine (initial args) */ 188 /* data associated with this coroutine (initial args) */
93 AV *args; 189 AV *args;
190 int refcnt;
191 int flags; /* CF_ flags */
192
193 /* optionally saved, might be zero */
194 AV *defav; /* @_ */
195 SV *defsv; /* $_ */
196 SV *errsv; /* $@ */
197 IO *deffh; /* default filehandle */
198 SV *irssv; /* $/ */
199 SV *irssv_sv; /* real $/ cache */
200
201#define VAR(name,type) type name;
202# include "state.h"
203#undef VAR
204
205 /* statistics */
206 int usecount; /* number of switches to this coro */
207
208 /* coro process data */
209 int prio;
210
211 /* linked list */
212 struct coro *next, *prev;
213 HV *hv; /* the perl hash associated with this coro, if any */
94}; 214};
95 215
96typedef struct coro *Coro__State; 216typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 217typedef struct coro *Coro__State_or_hashref;
98
99static AV *main_mainstack; /* used to differentiate between $main and others */
100static HV *coro_state_stash;
101static SV *ucoro_state_sv;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104
105/* mostly copied from op.c:cv_clone2 */
106STATIC AV *
107clone_padlist (AV *protopadlist)
108{
109 AV *av;
110 I32 ix;
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113 SV **pname = AvARRAY (protopad_name);
114 SV **ppad = AvARRAY (protopad);
115 I32 fname = AvFILLp (protopad_name);
116 I32 fpad = AvFILLp (protopad);
117 AV *newpadlist, *newpad_name, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127
128 newpadlist = newAV ();
129 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name);
131 av_store (newpadlist, 1, (SV *) newpad);
132
133 av = newAV (); /* will be @_ */
134 av_extend (av, 0);
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137
138 for (ix = fpad; ix > 0; ix--)
139 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
141 if (namesv && namesv != &PL_sv_undef)
142 {
143 char *name = SvPVX (namesv); /* XXX */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
145 { /* lexical from outside? */
146 npad[ix] = SvREFCNT_inc (ppad[ix]);
147 }
148 else
149 { /* our own lexical */
150 SV *sv;
151 if (*name == '&')
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175
176#if 0 /* return -ENOTUNDERSTOOD */
177 /* Now that vars are all in place, clone nested closures. */
178
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC void
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316
317 {
318 dSP;
319 CV *cv;
320
321 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs))
323 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist;
330#ifdef USE_THREADS
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 }
337
338 PUTBACK;
339 }
340}
341
342static void
343save_state(pTHX_ Coro__State c, int flags)
344{
345 {
346 dSP;
347 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo;
350
351 /*
352 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :(
354 */
355
356 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */
358 for (;;)
359 {
360 do
361 {
362 PERL_CONTEXT *cx = &ccstk[cxix--];
363
364 if (CxTYPE(cx) == CXt_SUB)
365 {
366 CV *cv = cx->blk_sub.cv;
367 if (CvDEPTH(cv))
368 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv));
384 PUSHs ((SV *)cv);
385
386 get_padlist (cv); /* this is a monster */
387 }
388 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 }
396 while (cxix >= 0);
397
398 if (top_si->si_type == PERLSI_MAIN)
399 break;
400
401 top_si = top_si->si_prev;
402 ccstk = top_si->si_cxstack;
403 cxix = top_si->si_cxix;
404 }
405
406 PUTBACK;
407 }
408
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412
413 /* I have not the slightest idea of why av_reify is necessary */
414 /* but if it's missing the defav contents magically get replaced sometimes */
415 if (c->defav)
416 av_reify (c->defav);
417
418 c->dowarn = PL_dowarn;
419 c->in_eval = PL_in_eval;
420
421 c->curstackinfo = PL_curstackinfo;
422 c->curstack = PL_curstack;
423 c->mainstack = PL_mainstack;
424 c->stack_sp = PL_stack_sp;
425 c->op = PL_op;
426 c->curpad = PL_curpad;
427 c->stack_base = PL_stack_base;
428 c->stack_max = PL_stack_max;
429 c->tmps_stack = PL_tmps_stack;
430 c->tmps_floor = PL_tmps_floor;
431 c->tmps_ix = PL_tmps_ix;
432 c->tmps_max = PL_tmps_max;
433 c->markstack = PL_markstack;
434 c->markstack_ptr = PL_markstack_ptr;
435 c->markstack_max = PL_markstack_max;
436 c->scopestack = PL_scopestack;
437 c->scopestack_ix = PL_scopestack_ix;
438 c->scopestack_max = PL_scopestack_max;
439 c->savestack = PL_savestack;
440 c->savestack_ix = PL_savestack_ix;
441 c->savestack_max = PL_savestack_max;
442 c->retstack = PL_retstack;
443 c->retstack_ix = PL_retstack_ix;
444 c->retstack_max = PL_retstack_max;
445 c->curcop = PL_curcop;
446 c->top_env = PL_top_env;
447}
448
449/*
450 * allocate various perl stacks. This is an exact copy
451 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need
453 * a lot of stackspace.
454 */
455STATIC void
456coro_init_stacks (pTHX)
457{
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
459 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462
463 PL_stack_base = AvARRAY(PL_curstack);
464 PL_stack_sp = PL_stack_base;
465 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466
467 New(50,PL_tmps_stack,96,SV*);
468 PL_tmps_floor = -1;
469 PL_tmps_ix = -1;
470 PL_tmps_max = 96;
471
472 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16;
475
476 SET_MARK_OFFSET;
477
478 New(54,PL_scopestack,16,I32);
479 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16;
481
482 New(54,PL_savestack,96,ANY);
483 PL_savestack_ix = 0;
484 PL_savestack_max = 96;
485
486 New(54,PL_retstack,8,OP*);
487 PL_retstack_ix = 0;
488 PL_retstack_max = 8;
489}
490
491/*
492 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */
495STATIC void
496destroy_stacks(pTHX)
497{
498 /* is this ugly, I ask? */
499 while (PL_scopestack_ix)
500 LEAVE;
501
502 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS;
505
506 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next;
508
509 while (PL_curstackinfo)
510 {
511 PERL_SI *p = PL_curstackinfo->si_prev;
512
513 {
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
520 dounwind(-1);
521
522 SvREFCNT_dec(PL_curstackinfo->si_stack);
523 Safefree(PL_curstackinfo->si_cxstack);
524 Safefree(PL_curstackinfo);
525 PL_curstackinfo = p;
526 }
527
528 Safefree(PL_tmps_stack);
529 Safefree(PL_markstack);
530 Safefree(PL_scopestack);
531 Safefree(PL_savestack);
532 Safefree(PL_retstack);
533}
534
535static void
536allocate_stack (Coro__State ctx, int alloc)
537{
538 coro_stack *stack;
539
540 New (0, stack, 1, coro_stack);
541
542 stack->refcnt = 1;
543 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0;
545 if (alloc)
546 {
547#ifdef HAVE_MMAP
548 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
550 if (stack->sptr == (void *)-1)
551#endif
552 {
553 /*FIXME*//*D*//* reasonable stack size! */
554 stack->ssize = -4096 * sizeof (long);
555 New (0, stack->sptr, 4096, long);
556 }
557 }
558 else
559 stack->sptr = 0;
560
561 ctx->stack = stack;
562}
563
564static void
565deallocate_stack (Coro__State ctx)
566{
567 coro_stack *stack = ctx->stack;
568
569 ctx->stack = 0;
570
571 if (stack)
572 {
573 if (!--stack->refcnt)
574 {
575#ifdef HAVE_MMAP
576 if (stack->ssize > 0 && stack->sptr)
577 munmap (stack->sptr, stack->ssize);
578 else
579#else
580 Safefree (stack->sptr);
581#endif
582 Safefree (stack);
583 }
584 else if (ctx->gencnt == stack->gencnt)
585 --stack->usecnt;
586 }
587}
588
589static void
590setup_coro (void *arg)
591{
592 /*
593 * emulate part of the perl startup here.
594 */
595 dSP;
596 Coro__State ctx = (Coro__State)arg;
597 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
598
599 coro_init_stacks (aTHX);
600 /*PL_curcop = 0;*/
601 /*PL_in_eval = PL_in_eval;*/ /* inherit */
602 SvREFCNT_dec (GvAV (PL_defgv));
603 GvAV (PL_defgv) = ctx->args;
604
605 SPAGAIN;
606
607 if (ctx->stack)
608 {
609 ctx->cursp = 0;
610
611 PUSHMARK(SP);
612 PUTBACK;
613 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
614
615 if (SvTRUE (ERRSV))
616 croak (NULL);
617 else
618 croak ("FATAL: CCTXT coroutine returned!");
619 }
620 else
621 {
622 UNOP myop;
623
624 PL_op = (OP *)&myop;
625
626 Zero(&myop, 1, UNOP);
627 myop.op_next = Nullop;
628 myop.op_flags = OPf_WANT_VOID;
629
630 PUSHMARK(SP);
631 XPUSHs (sub_init);
632 /*
633 * the next line is slightly wrong, as PL_op->op_next
634 * is actually being executed so we skip the first op.
635 * that doesn't matter, though, since it is only
636 * pp_nextstate and we never return...
637 * ah yes, and I don't care anyways ;)
638 */
639 PUTBACK;
640 PL_op = pp_entersub();
641 SPAGAIN;
642
643 ENTER; /* necessary e.g. for dounwind */
644 }
645}
646
647static void
648continue_coro (void *arg)
649{
650 /*
651 * this is a _very_ stripped down perl interpreter ;)
652 */
653 Coro__State ctx = (Coro__State)arg;
654
655 /*FIXME*//* must set up top_env here */
656 ctx->cursp = 0;
657 PL_op = PL_op->op_next;
658 CALLRUNOPS(aTHX);
659
660 abort ();
661}
662
663STATIC void
664transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
665{
666 dSP;
667 dSTACKLEVEL;
668
669 if (prev != next)
670 {
671 if (next->mainstack)
672 {
673 SAVE (prev, flags);
674 LOAD (next);
675
676 /* mark this state as in-use */
677 next->mainstack = 0;
678 next->tmps_ix = -2;
679
680 /* stacklevel changed? if yes, grab the stack for us! */
681 if (flags & TRANSFER_SAVE_CCTXT)
682 {
683 if (!prev->stack)
684 allocate_stack (prev, 0);
685 else if (prev->cursp != stacklevel
686 && prev->stack->usecnt > 1)
687 {
688 prev->gencnt = ++prev->stack->gencnt;
689 prev->stack->usecnt = 1;
690 }
691
692 /* has our stack been invalidated? */
693 if (next->stack && next->stack->gencnt != next->gencnt)
694 {
695 deallocate_stack (next);
696 allocate_stack (next, 1);
697 coro_create (&(next->stack->cctx),
698 continue_coro, (void *)next,
699 next->stack->sptr, labs (next->stack->ssize));
700 }
701
702 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703 }
704
705 }
706 else if (next->tmps_ix == -2)
707 croak ("tried to transfer to running coroutine");
708 else
709 {
710 SAVE (prev, -1); /* first get rid of the old state */
711
712 if (flags & TRANSFER_SAVE_CCTXT)
713 {
714 if (!prev->stack)
715 allocate_stack (prev, 0);
716
717 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718 {
719 setup_coro (next);
720
721 prev->stack->refcnt++;
722 prev->stack->usecnt++;
723 next->stack = prev->stack;
724 next->gencnt = prev->gencnt;
725 }
726 else
727 {
728 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx),
730 setup_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize));
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733 }
734 }
735 else
736 setup_coro (next);
737 }
738 }
739
740 next->cursp = stacklevel;
741}
742
743static struct coro *
744sv_to_coro (SV *arg, const char *funcname, const char *varname)
745{
746 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
747 {
748 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
749
750 if (!he)
751 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
752
753 arg = HeVAL(he);
754 }
755
756 /* must also be changed inside Coro::Cont::yield */
757 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758 return (struct coro *) SvIV((SV*)SvRV(arg));
759
760 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
761 /*NORETURN*/
762}
763
764static void
765api_transfer(pTHX_ SV *prev, SV *next, int flags)
766{
767 transfer(aTHX_
768 sv_to_coro (prev, "Coro::transfer", "prev"),
769 sv_to_coro (next, "Coro::transfer", "next"),
770 flags);
771}
772 218
773/** Coro ********************************************************************/ 219/** Coro ********************************************************************/
774 220
775#define PRIO_MAX 3 221#define PRIO_MAX 3
776#define PRIO_HIGH 1 222#define PRIO_HIGH 1
… …
778#define PRIO_LOW -1 224#define PRIO_LOW -1
779#define PRIO_IDLE -3 225#define PRIO_IDLE -3
780#define PRIO_MIN -4 226#define PRIO_MIN -4
781 227
782/* for Coro.pm */ 228/* for Coro.pm */
783static GV *coro_current, *coro_idle; 229static SV *coro_current;
784static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 230static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
785static int coro_nready; 231static int coro_nready;
232static struct coro *coro_first;
786 233
787static void 234/** lowlevel stuff **********************************************************/
788coro_enq (SV *sv) 235
236static AV *
237coro_clone_padlist (pTHX_ CV *cv)
789{ 238{
790 if (SvROK (sv)) 239 AV *padlist = CvPADLIST (cv);
240 AV *newpadlist, *newpad;
241
242 newpadlist = newAV ();
243 AvREAL_off (newpadlist);
244#if PERL_VERSION_ATLEAST (5,9,0)
245 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
246#else
247 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
248#endif
249 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
250 --AvFILLp (padlist);
251
252 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
253 av_store (newpadlist, 1, (SV *)newpad);
254
255 return newpadlist;
256}
257
258static void
259free_padlist (pTHX_ AV *padlist)
260{
261 /* may be during global destruction */
262 if (SvREFCNT (padlist))
791 { 263 {
792 SV *hv = SvRV (sv); 264 I32 i = AvFILLp (padlist);
793 if (SvTYPE (hv) == SVt_PVHV) 265 while (i >= 0)
794 { 266 {
795 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 267 SV **svp = av_fetch (padlist, i--, FALSE);
796 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 268 if (svp)
269 {
270 SV *sv;
271 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
272 SvREFCNT_dec (sv);
797 273
798 prio = prio > PRIO_MAX ? PRIO_MAX 274 SvREFCNT_dec (*svp);
799 : prio < PRIO_MIN ? PRIO_MIN 275 }
800 : prio;
801
802 av_push (coro_ready [prio - PRIO_MIN], sv);
803 coro_nready++;
804
805 return;
806 } 276 }
277
278 SvREFCNT_dec ((SV*)padlist);
279 }
280}
281
282static int
283coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
284{
285 AV *padlist;
286 AV *av = (AV *)mg->mg_obj;
287
288 /* casting is fun. */
289 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
290 free_padlist (aTHX_ padlist);
291
292 SvREFCNT_dec (av);
293
294 return 0;
295}
296
297#define PERL_MAGIC_coro PERL_MAGIC_ext
298
299static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
300
301#define CORO_MAGIC(cv) \
302 SvMAGIC (cv) \
303 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
304 ? SvMAGIC (cv) \
305 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
306 : 0
307
308static struct coro *
309SvSTATE_ (pTHX_ SV *coro)
310{
311 HV *stash;
312 MAGIC *mg;
313
314 if (SvROK (coro))
315 coro = SvRV (coro);
316
317 if (SvTYPE (coro) != SVt_PVHV)
318 croak ("Coro::State object required");
319
320 stash = SvSTASH (coro);
321 if (stash != coro_stash && stash != coro_state_stash)
322 {
323 /* very slow, but rare, check */
324 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
325 croak ("Coro::State object required");
326 }
327
328 mg = CORO_MAGIC (coro);
329 return (struct coro *)mg->mg_ptr;
330}
331
332#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
333
334/* the next two functions merely cache the padlists */
335static void
336get_padlist (pTHX_ CV *cv)
337{
338 MAGIC *mg = CORO_MAGIC (cv);
339 AV *av;
340
341 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
342 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
343 else
344 {
345#if CORO_PREFER_PERL_FUNCTIONS
346 /* this is probably cleaner, but also slower? */
347 CV *cp = Perl_cv_clone (cv);
348 CvPADLIST (cv) = CvPADLIST (cp);
349 CvPADLIST (cp) = 0;
350 SvREFCNT_dec (cp);
351#else
352 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
353#endif
807 } 354 }
355}
808 356
809 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 357static void
358put_padlist (pTHX_ CV *cv)
359{
360 MAGIC *mg = CORO_MAGIC (cv);
361 AV *av;
362
363 if (!mg)
364 {
365 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
366 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
367 mg->mg_virtual = &vtbl_coro;
368 mg->mg_obj = (SV *)newAV ();
369 }
370
371 av = (AV *)mg->mg_obj;
372
373 if (AvFILLp (av) >= AvMAX (av))
374 av_extend (av, AvMAX (av) + 1);
375
376 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
377}
378
379/** load & save, init *******************************************************/
380
381static void
382load_perl (pTHX_ Coro__State c)
383{
384#define VAR(name,type) PL_ ## name = c->name;
385# include "state.h"
386#undef VAR
387
388 GvSV (PL_defgv) = c->defsv;
389 GvAV (PL_defgv) = c->defav;
390 GvSV (PL_errgv) = c->errsv;
391 PL_defoutgv = c->deffh;
392 PL_rs = c->irssv;
393 GvSV (irsgv) = c->irssv_sv;
394
395 {
396 dSP;
397 CV *cv;
398
399 /* now do the ugly restore mess */
400 while ((cv = (CV *)POPs))
401 {
402 put_padlist (aTHX_ cv); /* mark this padlist as available */
403 CvDEPTH (cv) = PTR2IV (POPs);
404 CvPADLIST (cv) = (AV *)POPs;
405 }
406
407 PUTBACK;
408 }
409}
410
411static void
412save_perl (pTHX_ Coro__State c)
413{
414 {
415 dSP;
416 I32 cxix = cxstack_ix;
417 PERL_CONTEXT *ccstk = cxstack;
418 PERL_SI *top_si = PL_curstackinfo;
419
420 /*
421 * the worst thing you can imagine happens first - we have to save
422 * (and reinitialize) all cv's in the whole callchain :(
423 */
424
425 XPUSHs (Nullsv);
426 /* this loop was inspired by pp_caller */
427 for (;;)
428 {
429 while (cxix >= 0)
430 {
431 PERL_CONTEXT *cx = &ccstk[cxix--];
432
433 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
434 {
435 CV *cv = cx->blk_sub.cv;
436
437 if (CvDEPTH (cv))
438 {
439 EXTEND (SP, 3);
440 PUSHs ((SV *)CvPADLIST (cv));
441 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
442 PUSHs ((SV *)cv);
443
444 CvDEPTH (cv) = 0;
445 get_padlist (aTHX_ cv);
446 }
447 }
448 }
449
450 if (top_si->si_type == PERLSI_MAIN)
451 break;
452
453 top_si = top_si->si_prev;
454 ccstk = top_si->si_cxstack;
455 cxix = top_si->si_cxix;
456 }
457
458 PUTBACK;
459 }
460
461 c->defav = GvAV (PL_defgv);
462 c->defsv = DEFSV;
463 c->errsv = ERRSV;
464 c->deffh = PL_defoutgv;
465 c->irssv = PL_rs;
466 c->irssv_sv = GvSV (irsgv);
467
468#define VAR(name,type)c->name = PL_ ## name;
469# include "state.h"
470#undef VAR
471}
472
473/*
474 * allocate various perl stacks. This is an exact copy
475 * of perl.c:init_stacks, except that it uses less memory
476 * on the (sometimes correct) assumption that coroutines do
477 * not usually need a lot of stackspace.
478 */
479#if CORO_PREFER_PERL_FUNCTIONS
480# define coro_init_stacks init_stacks
481#else
482static void
483coro_init_stacks (pTHX)
484{
485 PL_curstackinfo = new_stackinfo(64, 6);
486 PL_curstackinfo->si_type = PERLSI_MAIN;
487 PL_curstack = PL_curstackinfo->si_stack;
488 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
489
490 PL_stack_base = AvARRAY(PL_curstack);
491 PL_stack_sp = PL_stack_base;
492 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
493
494 New(50,PL_tmps_stack,64,SV*);
495 PL_tmps_floor = -1;
496 PL_tmps_ix = -1;
497 PL_tmps_max = 64;
498
499 New(54,PL_markstack,16,I32);
500 PL_markstack_ptr = PL_markstack;
501 PL_markstack_max = PL_markstack + 16;
502
503#ifdef SET_MARK_OFFSET
504 SET_MARK_OFFSET;
505#endif
506
507 New(54,PL_scopestack,16,I32);
508 PL_scopestack_ix = 0;
509 PL_scopestack_max = 16;
510
511 New(54,PL_savestack,64,ANY);
512 PL_savestack_ix = 0;
513 PL_savestack_max = 64;
514
515#if !PERL_VERSION_ATLEAST (5,9,0)
516 New(54,PL_retstack,4,OP*);
517 PL_retstack_ix = 0;
518 PL_retstack_max = 4;
519#endif
520}
521#endif
522
523/*
524 * destroy the stacks, the callchain etc...
525 */
526static void
527coro_destroy_stacks (pTHX)
528{
529 while (PL_curstackinfo->si_next)
530 PL_curstackinfo = PL_curstackinfo->si_next;
531
532 while (PL_curstackinfo)
533 {
534 PERL_SI *p = PL_curstackinfo->si_prev;
535
536 if (!IN_DESTRUCT)
537 SvREFCNT_dec (PL_curstackinfo->si_stack);
538
539 Safefree (PL_curstackinfo->si_cxstack);
540 Safefree (PL_curstackinfo);
541 PL_curstackinfo = p;
542 }
543
544 Safefree (PL_tmps_stack);
545 Safefree (PL_markstack);
546 Safefree (PL_scopestack);
547 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0)
549 Safefree (PL_retstack);
550#endif
551}
552
553static size_t
554coro_rss (pTHX_ struct coro *coro)
555{
556 size_t rss = sizeof (coro);
557
558 if (coro->mainstack)
559 {
560 if (coro->flags & CF_RUNNING)
561 {
562 #define VAR(name,type)coro->name = PL_ ## name;
563 # include "state.h"
564 #undef VAR
565 }
566
567 rss += sizeof (coro->curstackinfo);
568 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
569 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
570 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
571 rss += coro->tmps_max * sizeof (SV *);
572 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
573 rss += coro->scopestack_max * sizeof (I32);
574 rss += coro->savestack_max * sizeof (ANY);
575
576#if !PERL_VERSION_ATLEAST (5,9,0)
577 rss += coro->retstack_max * sizeof (OP *);
578#endif
579 }
580
581 return rss;
582}
583
584/** coroutine stack handling ************************************************/
585
586static void
587coro_setup (pTHX_ struct coro *coro)
588{
589 /*
590 * emulate part of the perl startup here.
591 */
592 coro_init_stacks (aTHX);
593
594 PL_runops = RUNOPS_DEFAULT;
595 PL_curcop = &PL_compiling;
596 PL_in_eval = EVAL_NULL;
597 PL_comppad = 0;
598 PL_curpm = 0;
599 PL_localizing = 0;
600 PL_dirty = 0;
601 PL_restartop = 0;
602
603 GvSV (PL_defgv) = NEWSV (0, 0);
604 GvAV (PL_defgv) = coro->args; coro->args = 0;
605 GvSV (PL_errgv) = NEWSV (0, 0);
606 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
607 PL_rs = newSVsv (GvSV (irsgv));
608
609 {
610 IO *io = newIO ();
611 PL_defoutgv = newGVgen ("Coro");
612 GvIOp(PL_defoutgv) = io;
613 IoTYPE (io) = IoTYPE_WRONLY;
614 IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
615 IoFLAGS (io) |= IOf_FLUSH;
616 }
617
618 {
619 dSP;
620 LOGOP myop;
621
622 Zero (&myop, 1, LOGOP);
623 myop.op_next = Nullop;
624 myop.op_flags = OPf_WANT_VOID;
625
626 PUSHMARK (SP);
627 XPUSHs (av_shift (GvAV (PL_defgv)));
628 PUTBACK;
629 PL_op = (OP *)&myop;
630 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
631 SPAGAIN;
632 }
633
634 ENTER; /* necessary e.g. for dounwind */
635}
636
637static void
638coro_destroy (pTHX_ struct coro *coro)
639{
640 if (!IN_DESTRUCT)
641 {
642 /* restore all saved variables and stuff */
643 LEAVE_SCOPE (0);
644 assert (PL_tmps_floor == -1);
645
646 /* free all temporaries */
647 FREETMPS;
648 assert (PL_tmps_ix == -1);
649
650 /* unwind all extra stacks */
651 POPSTACK_TO (PL_mainstack);
652
653 /* unwind main stack */
654 dounwind (-1);
655 }
656
657 SvREFCNT_dec (GvSV (PL_defgv));
658 SvREFCNT_dec (GvAV (PL_defgv));
659 SvREFCNT_dec (GvSV (PL_errgv));
660 SvREFCNT_dec (PL_defoutgv);
661 SvREFCNT_dec (PL_rs);
662 SvREFCNT_dec (GvSV (irsgv));
663
664 coro_destroy_stacks (aTHX);
665}
666
667static void
668free_coro_mortal (pTHX)
669{
670 if (coro_mortal)
671 {
672 SvREFCNT_dec (coro_mortal);
673 coro_mortal = 0;
674 }
675}
676
677static int
678runops_trace (pTHX)
679{
680 COP *oldcop = 0;
681 int oldcxix = -2;
682 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
683 coro_cctx *cctx = coro->cctx;
684
685 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
686 {
687 PERL_ASYNC_CHECK ();
688
689 if (cctx->flags & CC_TRACE_ALL)
690 {
691 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
692 {
693 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
694 SV **bot, **top;
695 AV *av = newAV (); /* return values */
696 SV **cb;
697 dSP;
698
699 GV *gv = CvGV (cx->blk_sub.cv);
700 SV *fullname = sv_2mortal (newSV (0));
701 if (isGV (gv))
702 gv_efullname3 (fullname, gv, 0);
703
704 bot = PL_stack_base + cx->blk_oldsp + 1;
705 top = cx->blk_gimme == G_ARRAY ? SP + 1
706 : cx->blk_gimme == G_SCALAR ? bot + 1
707 : bot;
708
709 while (bot < top)
710 av_push (av, SvREFCNT_inc (*bot++));
711
712 PL_runops = RUNOPS_DEFAULT;
713 ENTER;
714 SAVETMPS;
715 EXTEND (SP, 3);
716 PUSHMARK (SP);
717 PUSHs (&PL_sv_no);
718 PUSHs (fullname);
719 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
720 PUTBACK;
721 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
722 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
723 SPAGAIN;
724 FREETMPS;
725 LEAVE;
726 PL_runops = runops_trace;
727 }
728
729 if (oldcop != PL_curcop)
730 {
731 oldcop = PL_curcop;
732
733 if (PL_curcop != &PL_compiling)
734 {
735 SV **cb;
736
737 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
738 {
739 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
740
741 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
742 {
743 runops_proc_t old_runops = PL_runops;
744 dSP;
745 GV *gv = CvGV (cx->blk_sub.cv);
746 SV *fullname = sv_2mortal (newSV (0));
747
748 if (isGV (gv))
749 gv_efullname3 (fullname, gv, 0);
750
751 PL_runops = RUNOPS_DEFAULT;
752 ENTER;
753 SAVETMPS;
754 EXTEND (SP, 3);
755 PUSHMARK (SP);
756 PUSHs (&PL_sv_yes);
757 PUSHs (fullname);
758 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
759 PUTBACK;
760 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
761 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
762 SPAGAIN;
763 FREETMPS;
764 LEAVE;
765 PL_runops = runops_trace;
766 }
767
768 oldcxix = cxstack_ix;
769 }
770
771 if (cctx->flags & CC_TRACE_LINE)
772 {
773 dSP;
774
775 PL_runops = RUNOPS_DEFAULT;
776 ENTER;
777 SAVETMPS;
778 EXTEND (SP, 3);
779 PL_runops = RUNOPS_DEFAULT;
780 PUSHMARK (SP);
781 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
782 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
783 PUTBACK;
784 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
785 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
786 SPAGAIN;
787 FREETMPS;
788 LEAVE;
789 PL_runops = runops_trace;
790 }
791 }
792 }
793 }
794 }
795
796 TAINT_NOT;
797 return 0;
798}
799
800/* inject a fake call to Coro::State::_cctx_init into the execution */
801/* _cctx_init should be careful, as it could be called at almost any time */
802/* during execution of a perl program */
803static void NOINLINE
804prepare_cctx (pTHX_ coro_cctx *cctx)
805{
806 dSP;
807 LOGOP myop;
808
809 PL_top_env = &PL_start_env;
810
811 if (cctx->flags & CC_TRACE)
812 PL_runops = runops_trace;
813
814 Zero (&myop, 1, LOGOP);
815 myop.op_next = PL_op;
816 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
817
818 PUSHMARK (SP);
819 EXTEND (SP, 2);
820 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
821 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
822 PUTBACK;
823 PL_op = (OP *)&myop;
824 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
825 SPAGAIN;
826}
827
828/*
829 * this is a _very_ stripped down perl interpreter ;)
830 */
831static void
832coro_run (void *arg)
833{
834 dTHX;
835
836 /* coro_run is the alternative tail of transfer(), so unlock here. */
837 UNLOCK;
838
839 /* we now skip the entersub that lead to transfer() */
840 PL_op = PL_op->op_next;
841
842 /* inject a fake subroutine call to cctx_init */
843 prepare_cctx (aTHX_ (coro_cctx *)arg);
844
845 /* somebody or something will hit me for both perl_run and PL_restartop */
846 PL_restartop = PL_op;
847 perl_run (PL_curinterp);
848
849 /*
850 * If perl-run returns we assume exit() was being called or the coro
851 * fell off the end, which seems to be the only valid (non-bug)
852 * reason for perl_run to return. We try to exit by jumping to the
853 * bootstrap-time "top" top_env, as we cannot restore the "main"
854 * coroutine as Coro has no such concept
855 */
856 PL_top_env = main_top_env;
857 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
858}
859
860static coro_cctx *
861cctx_new ()
862{
863 coro_cctx *cctx;
864 void *stack_start;
865 size_t stack_size;
866
867 ++cctx_count;
868
869 Newz (0, cctx, 1, coro_cctx);
870
871#if HAVE_MMAP
872
873 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
874 /* mmap supposedly does allocate-on-write for us */
875 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
876
877 if (cctx->sptr != (void *)-1)
878 {
879# if CORO_STACKGUARD
880 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
881# endif
882 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
883 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
884 cctx->flags |= CC_MAPPED;
885 }
886 else
887#endif
888 {
889 cctx->ssize = coro_stacksize * (long)sizeof (long);
890 New (0, cctx->sptr, coro_stacksize, long);
891
892 if (!cctx->sptr)
893 {
894 perror ("FATAL: unable to allocate stack for coroutine");
895 _exit (EXIT_FAILURE);
896 }
897
898 stack_start = cctx->sptr;
899 stack_size = cctx->ssize;
900 }
901
902 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
903 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
904
905 return cctx;
906}
907
908static void
909cctx_destroy (coro_cctx *cctx)
910{
911 if (!cctx)
912 return;
913
914 --cctx_count;
915
916#if CORO_USE_VALGRIND
917 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
918#endif
919
920#if HAVE_MMAP
921 if (cctx->flags & CC_MAPPED)
922 munmap (cctx->sptr, cctx->ssize);
923 else
924#endif
925 Safefree (cctx->sptr);
926
927 Safefree (cctx);
928}
929
930static coro_cctx *
931cctx_get (pTHX)
932{
933 while (cctx_first)
934 {
935 coro_cctx *cctx = cctx_first;
936 cctx_first = cctx->next;
937 --cctx_idle;
938
939 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
940 return cctx;
941
942 cctx_destroy (cctx);
943 }
944
945 return cctx_new ();
946}
947
948static void
949cctx_put (coro_cctx *cctx)
950{
951 /* free another cctx if overlimit */
952 if (cctx_idle >= MAX_IDLE_CCTX)
953 {
954 coro_cctx *first = cctx_first;
955 cctx_first = first->next;
956 --cctx_idle;
957
958 cctx_destroy (first);
959 }
960
961 ++cctx_idle;
962 cctx->next = cctx_first;
963 cctx_first = cctx;
964}
965
966/** coroutine switching *****************************************************/
967
968static void NOINLINE
969transfer_check (pTHX_ struct coro *prev, struct coro *next)
970{
971 if (prev != next)
972 {
973 if (!(prev->flags & (CF_RUNNING | CF_NEW)))
974 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
975
976 if (next->flags & CF_RUNNING)
977 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
978
979 if (next->flags & CF_DESTROYED)
980 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
981
982 if (PL_lex_state != LEX_NOTPARSING)
983 croak ("Coro::State::transfer called while parsing, but this is not supported");
984 }
985}
986
987/* always use the TRANSFER macro */
988static void NOINLINE
989transfer (pTHX_ struct coro *prev, struct coro *next)
990{
991 dSTACKLEVEL;
992
993 /* sometimes transfer is only called to set idle_sp */
994 if (!next)
995 {
996 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
997 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
998 }
999 else if (prev != next)
1000 {
1001 coro_cctx *prev__cctx;
1002
1003 if (prev->flags & CF_NEW)
1004 {
1005 /* create a new empty context */
1006 Newz (0, prev->cctx, 1, coro_cctx);
1007 prev->flags &= ~CF_NEW;
1008 prev->flags |= CF_RUNNING;
1009 }
1010
1011 prev->flags &= ~CF_RUNNING;
1012 next->flags |= CF_RUNNING;
1013
1014 LOCK;
1015
1016 if (next->flags & CF_NEW)
1017 {
1018 /* need to start coroutine */
1019 next->flags &= ~CF_NEW;
1020 /* first get rid of the old state */
1021 save_perl (aTHX_ prev);
1022 /* setup coroutine call */
1023 coro_setup (aTHX_ next);
1024 }
1025 else
1026 {
1027 /* coroutine already started */
1028 save_perl (aTHX_ prev);
1029 load_perl (aTHX_ next);
1030 }
1031
1032 prev__cctx = prev->cctx;
1033
1034 /* possibly "free" the cctx */
1035 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
1036 {
1037 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1038 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1039
1040 prev->cctx = 0;
1041
1042 cctx_put (prev__cctx);
1043 }
1044
1045 ++next->usecount;
1046
1047 if (!next->cctx)
1048 next->cctx = cctx_get (aTHX);
1049
1050 if (prev__cctx != next->cctx)
1051 {
1052 prev__cctx->top_env = PL_top_env;
1053 PL_top_env = next->cctx->top_env;
1054 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1055 }
1056
1057 free_coro_mortal (aTHX);
1058 UNLOCK;
1059 }
1060}
1061
1062struct transfer_args
1063{
1064 struct coro *prev, *next;
1065};
1066
1067#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1068#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1069
1070/** high level stuff ********************************************************/
1071
1072static int
1073coro_state_destroy (pTHX_ struct coro *coro)
1074{
1075 if (coro->flags & CF_DESTROYED)
1076 return 0;
1077
1078 coro->flags |= CF_DESTROYED;
1079
1080 if (coro->flags & CF_READY)
1081 {
1082 /* reduce nready, as destroying a ready coro effectively unreadies it */
1083 /* alternative: look through all ready queues and remove the coro */
1084 LOCK;
1085 --coro_nready;
1086 UNLOCK;
1087 }
1088 else
1089 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1090
1091 if (coro->mainstack && coro->mainstack != main_mainstack)
1092 {
1093 struct coro temp;
1094
1095 if (coro->flags & CF_RUNNING)
1096 croak ("FATAL: tried to destroy currently running coroutine");
1097
1098 save_perl (aTHX_ &temp);
1099 load_perl (aTHX_ coro);
1100
1101 coro_destroy (aTHX_ coro);
1102
1103 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1104
1105 coro->mainstack = 0;
1106 }
1107
1108 cctx_destroy (coro->cctx);
1109 SvREFCNT_dec (coro->args);
1110
1111 if (coro->next) coro->next->prev = coro->prev;
1112 if (coro->prev) coro->prev->next = coro->next;
1113 if (coro == coro_first) coro_first = coro->next;
1114
1115 return 1;
1116}
1117
1118static int
1119coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1120{
1121 struct coro *coro = (struct coro *)mg->mg_ptr;
1122 mg->mg_ptr = 0;
1123
1124 coro->hv = 0;
1125
1126 if (--coro->refcnt < 0)
1127 {
1128 coro_state_destroy (aTHX_ coro);
1129 Safefree (coro);
1130 }
1131
1132 return 0;
1133}
1134
1135static int
1136coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1137{
1138 struct coro *coro = (struct coro *)mg->mg_ptr;
1139
1140 ++coro->refcnt;
1141
1142 return 0;
1143}
1144
1145static MGVTBL coro_state_vtbl = {
1146 0, 0, 0, 0,
1147 coro_state_free,
1148 0,
1149#ifdef MGf_DUP
1150 coro_state_dup,
1151#else
1152# define MGf_DUP 0
1153#endif
1154};
1155
1156static void
1157prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1158{
1159 ta->prev = SvSTATE (prev_sv);
1160 ta->next = SvSTATE (next_sv);
1161 TRANSFER_CHECK (*ta);
1162}
1163
1164static void
1165api_transfer (SV *prev_sv, SV *next_sv)
1166{
1167 dTHX;
1168 struct transfer_args ta;
1169
1170 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1171 TRANSFER (ta);
1172}
1173
1174/** Coro ********************************************************************/
1175
1176static void
1177coro_enq (pTHX_ SV *coro_sv)
1178{
1179 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
810} 1180}
811 1181
812static SV * 1182static SV *
813coro_deq (int min_prio) 1183coro_deq (pTHX_ int min_prio)
814{ 1184{
815 int prio = PRIO_MAX - PRIO_MIN; 1185 int prio = PRIO_MAX - PRIO_MIN;
816 1186
817 min_prio -= PRIO_MIN; 1187 min_prio -= PRIO_MIN;
818 if (min_prio < 0) 1188 if (min_prio < 0)
819 min_prio = 0; 1189 min_prio = 0;
820 1190
821 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1191 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
822 if (av_len (coro_ready[prio]) >= 0) 1192 if (AvFILLp (coro_ready [prio]) >= 0)
823 {
824 coro_nready--;
825 return av_shift (coro_ready[prio]); 1193 return av_shift (coro_ready [prio]);
826 }
827 1194
828 return 0; 1195 return 0;
829} 1196}
830 1197
831static void 1198static int
832api_ready (SV *coro) 1199api_ready (SV *coro_sv)
833{ 1200{
1201 dTHX;
1202 struct coro *coro;
1203
1204 if (SvROK (coro_sv))
1205 coro_sv = SvRV (coro_sv);
1206
1207 coro = SvSTATE (coro_sv);
1208
1209 if (coro->flags & CF_READY)
1210 return 0;
1211
1212 coro->flags |= CF_READY;
1213
1214 LOCK;
834 coro_enq (SvREFCNT_inc (coro)); 1215 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
835} 1216 ++coro_nready;
1217 UNLOCK;
836 1218
1219 return 1;
1220}
1221
837static void 1222static int
838api_schedule (int cede) 1223api_is_ready (SV *coro_sv)
839{ 1224{
1225 dTHX;
1226 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1227}
1228
1229static void
1230prepare_schedule (pTHX_ struct transfer_args *ta)
1231{
840 SV *prev, *next; 1232 SV *prev_sv, *next_sv;
841 1233
1234 for (;;)
1235 {
1236 LOCK;
1237 next_sv = coro_deq (aTHX_ PRIO_MIN);
1238
1239 /* nothing to schedule: call the idle handler */
1240 if (!next_sv)
1241 {
1242 dSP;
1243 UNLOCK;
1244
1245 ENTER;
1246 SAVETMPS;
1247
1248 PUSHMARK (SP);
1249 PUTBACK;
1250 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1251
1252 FREETMPS;
1253 LEAVE;
1254 continue;
1255 }
1256
1257 ta->next = SvSTATE (next_sv);
1258
1259 /* cannot transfer to destroyed coros, skip and look for next */
1260 if (ta->next->flags & CF_DESTROYED)
1261 {
1262 UNLOCK;
1263 SvREFCNT_dec (next_sv);
1264 /* coro_nready is already taken care of by destroy */
1265 continue;
1266 }
1267
1268 --coro_nready;
1269 UNLOCK;
1270 break;
1271 }
1272
1273 /* free this only after the transfer */
842 prev = GvSV (coro_current); 1274 prev_sv = SvRV (coro_current);
1275 ta->prev = SvSTATE (prev_sv);
1276 TRANSFER_CHECK (*ta);
1277 assert (ta->next->flags & CF_READY);
1278 ta->next->flags &= ~CF_READY;
1279 SvRV_set (coro_current, next_sv);
843 1280
844 if (cede) 1281 LOCK;
845 coro_enq (SvREFCNT_inc (prev)); 1282 free_coro_mortal (aTHX);
846 1283 coro_mortal = prev_sv;
847 next = coro_deq (PRIO_MIN); 1284 UNLOCK;
848
849 if (!next)
850 next = SvREFCNT_inc (GvSV (coro_idle));
851
852 GvSV (coro_current) = SvREFCNT_inc (next);
853 transfer (aTHX_
854 sv_to_coro (prev, "Coro::schedule", "current coroutine"),
855 sv_to_coro (next, "Coro::schedule", "next coroutine"),
856 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
857 SvREFCNT_dec (next);
858 SvREFCNT_dec (prev);
859} 1285}
860 1286
1287static void
1288prepare_cede (pTHX_ struct transfer_args *ta)
1289{
1290 api_ready (coro_current);
1291 prepare_schedule (aTHX_ ta);
1292}
1293
1294static int
1295prepare_cede_notself (pTHX_ struct transfer_args *ta)
1296{
1297 if (coro_nready)
1298 {
1299 SV *prev = SvRV (coro_current);
1300 prepare_schedule (aTHX_ ta);
1301 api_ready (prev);
1302 return 1;
1303 }
1304 else
1305 return 0;
1306}
1307
1308static void
1309api_schedule (void)
1310{
1311 dTHX;
1312 struct transfer_args ta;
1313
1314 prepare_schedule (aTHX_ &ta);
1315 TRANSFER (ta);
1316}
1317
1318static int
1319api_cede (void)
1320{
1321 dTHX;
1322 struct transfer_args ta;
1323
1324 prepare_cede (aTHX_ &ta);
1325
1326 if (ta.prev != ta.next)
1327 {
1328 TRANSFER (ta);
1329 return 1;
1330 }
1331 else
1332 return 0;
1333}
1334
1335static int
1336api_cede_notself (void)
1337{
1338 dTHX;
1339 struct transfer_args ta;
1340
1341 if (prepare_cede_notself (aTHX_ &ta))
1342 {
1343 TRANSFER (ta);
1344 return 1;
1345 }
1346 else
1347 return 0;
1348}
1349
1350static void
1351api_trace (SV *coro_sv, int flags)
1352{
1353 dTHX;
1354 struct coro *coro = SvSTATE (coro_sv);
1355
1356 if (flags & CC_TRACE)
1357 {
1358 if (!coro->cctx)
1359 coro->cctx = cctx_new ();
1360 else if (!(coro->cctx->flags & CC_TRACE))
1361 croak ("cannot enable tracing on coroutine with custom stack");
1362
1363 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1364 }
1365 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1366 {
1367 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1368
1369 if (coro->flags & CF_RUNNING)
1370 PL_runops = RUNOPS_DEFAULT;
1371 else
1372 coro->runops = RUNOPS_DEFAULT;
1373 }
1374}
1375
861MODULE = Coro::State PACKAGE = Coro::State 1376MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
862 1377
863PROTOTYPES: ENABLE 1378PROTOTYPES: DISABLE
864 1379
865BOOT: 1380BOOT:
866{ /* {} necessary for stoopid perl-5.6.x */ 1381{
867 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1382#ifdef USE_ITHREADS
868 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1383 MUTEX_INIT (&coro_mutex);
1384#endif
1385 BOOT_PAGESIZE;
1386
1387 irsgv = gv_fetchpv ("/", 1, SVt_PV);
1388
869 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1389 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
870 1390
871 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1391 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
872 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1392 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
873 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1393 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
874 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1394 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
875
876 if (!padlist_cache)
877 padlist_cache = newHV ();
878 1395
879 main_mainstack = PL_mainstack; 1396 main_mainstack = PL_mainstack;
1397 main_top_env = PL_top_env;
1398
1399 while (main_top_env->je_prev)
1400 main_top_env = main_top_env->je_prev;
880 1401
881 coroapi.ver = CORO_API_VERSION; 1402 coroapi.ver = CORO_API_VERSION;
882 coroapi.transfer = api_transfer; 1403 coroapi.transfer = api_transfer;
883}
884 1404
885Coro::State 1405 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
886_newprocess(args) 1406}
887 SV * args 1407
888 PROTOTYPE: $ 1408SV *
1409new (char *klass, ...)
889 CODE: 1410 CODE:
890 Coro__State coro; 1411{
1412 struct coro *coro;
1413 HV *hv;
1414 int i;
891 1415
892 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
893 croak ("Coro::State::_newprocess expects an arrayref");
894
895 New (0, coro, 1, struct coro); 1416 Newz (0, coro, 1, struct coro);
1417 coro->args = newAV ();
1418 coro->flags = CF_NEW;
896 1419
897 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1420 if (coro_first) coro_first->prev = coro;
898 coro->mainstack = 0; /* actual work is done inside transfer */ 1421 coro->next = coro_first;
899 coro->stack = 0; 1422 coro_first = coro;
900 1423
901 RETVAL = coro; 1424 coro->hv = hv = newHV ();
1425 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1426 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1427
1428 for (i = 1; i < items; i++)
1429 av_push (coro->args, newSVsv (ST (i)));
1430}
902 OUTPUT: 1431 OUTPUT:
903 RETVAL 1432 RETVAL
904 1433
1434# these not obviously related functions are all rolled into the same xs
1435# function to increase chances that they all will call transfer with the same
1436# stack offset
905void 1437void
906transfer(prev, next, flags) 1438_set_stacklevel (...)
907 Coro::State_or_hashref prev 1439 ALIAS:
908 Coro::State_or_hashref next 1440 Coro::State::transfer = 1
909 int flags 1441 Coro::schedule = 2
910 PROTOTYPE: @ 1442 Coro::cede = 3
1443 Coro::cede_notself = 4
911 CODE: 1444 CODE:
912 PUTBACK; 1445{
913 transfer (aTHX_ prev, next, flags); 1446 struct transfer_args ta;
914 SPAGAIN; 1447
1448 switch (ix)
1449 {
1450 case 0:
1451 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1452 ta.next = 0;
1453 break;
1454
1455 case 1:
1456 if (items != 2)
1457 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1458
1459 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1460 break;
1461
1462 case 2:
1463 prepare_schedule (aTHX_ &ta);
1464 break;
1465
1466 case 3:
1467 prepare_cede (aTHX_ &ta);
1468 break;
1469
1470 case 4:
1471 if (!prepare_cede_notself (aTHX_ &ta))
1472 XSRETURN_EMPTY;
1473
1474 break;
1475 }
1476
1477 BARRIER;
1478 TRANSFER (ta);
1479
1480 if (GIMME_V != G_VOID && ta.next != ta.prev)
1481 XSRETURN_YES;
1482}
1483
1484bool
1485_destroy (SV *coro_sv)
1486 CODE:
1487 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1488 OUTPUT:
1489 RETVAL
915 1490
916void 1491void
917DESTROY(coro)
918 Coro::State coro
919 CODE:
920
921 if (coro->mainstack && coro->mainstack != main_mainstack)
922 {
923 struct coro temp;
924
925 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
926 LOAD(aTHX_ coro);
927
928 destroy_stacks (aTHX);
929
930 LOAD((&temp)); /* this will get rid of defsv etc.. */
931
932 coro->mainstack = 0;
933 }
934
935 deallocate_stack (coro);
936
937 Safefree (coro);
938
939void
940flush()
941 CODE:
942#ifdef MAY_FLUSH
943 flush_padlist_cache ();
944#endif
945
946void
947_exit(code) 1492_exit (code)
948 int code 1493 int code
949 PROTOTYPE: $ 1494 PROTOTYPE: $
950 CODE: 1495 CODE:
951#if defined(__GLIBC__) || _POSIX_C_SOURCE
952 _exit (code); 1496 _exit (code);
953#else
954 signal (SIGTERM, SIG_DFL);
955 raise (SIGTERM);
956 exit (code);
957#endif
958 1497
959MODULE = Coro::State PACKAGE = Coro::Cont 1498int
1499cctx_stacksize (int new_stacksize = 0)
1500 CODE:
1501 RETVAL = coro_stacksize;
1502 if (new_stacksize)
1503 coro_stacksize = new_stacksize;
1504 OUTPUT:
1505 RETVAL
960 1506
961# this is slightly dirty (should expose a c-level api) 1507int
1508cctx_count ()
1509 CODE:
1510 RETVAL = cctx_count;
1511 OUTPUT:
1512 RETVAL
1513
1514int
1515cctx_idle ()
1516 CODE:
1517 RETVAL = cctx_idle;
1518 OUTPUT:
1519 RETVAL
962 1520
963void 1521void
964yield(...) 1522list ()
965 PROTOTYPE: @ 1523 PPCODE:
1524{
1525 struct coro *coro;
1526 for (coro = coro_first; coro; coro = coro->next)
1527 if (coro->hv)
1528 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1529}
1530
1531void
1532call (Coro::State coro, SV *coderef)
1533 ALIAS:
1534 eval = 1
1535 CODE:
1536{
1537 if (coro->mainstack)
1538 {
1539 struct coro temp;
1540 Zero (&temp, 1, struct coro);
1541
1542 if (!(coro->flags & CF_RUNNING))
1543 {
1544 save_perl (aTHX_ &temp);
1545 load_perl (aTHX_ coro);
1546 }
1547
1548 {
1549 dSP;
1550 ENTER;
1551 SAVETMPS;
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 if (ix)
1555 eval_sv (coderef, 0);
1556 else
1557 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1558 SPAGAIN;
1559 FREETMPS;
1560 LEAVE;
1561 PUTBACK;
1562 }
1563
1564 if (!(coro->flags & CF_RUNNING))
1565 {
1566 save_perl (aTHX_ coro);
1567 load_perl (aTHX_ &temp);
1568 }
1569 }
1570}
1571
1572SV *
1573is_ready (Coro::State coro)
1574 PROTOTYPE: $
1575 ALIAS:
1576 is_ready = CF_READY
1577 is_running = CF_RUNNING
1578 is_new = CF_NEW
1579 is_destroyed = CF_DESTROYED
1580 CODE:
1581 RETVAL = boolSV (coro->flags & ix);
1582 OUTPUT:
1583 RETVAL
1584
1585void
1586api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1587
1588SV *
1589has_stack (Coro::State coro)
1590 PROTOTYPE: $
1591 CODE:
1592 RETVAL = boolSV (!!coro->cctx);
1593 OUTPUT:
1594 RETVAL
1595
1596int
1597is_traced (Coro::State coro)
1598 PROTOTYPE: $
1599 CODE:
1600 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1601 OUTPUT:
1602 RETVAL
1603
1604IV
1605rss (Coro::State coro)
1606 PROTOTYPE: $
1607 ALIAS:
1608 usecount = 1
966 CODE: 1609 CODE:
967 static SV *returnstk; 1610 switch (ix)
968 SV *sv; 1611 {
969 AV *defav = GvAV (PL_defgv); 1612 case 0: RETVAL = coro_rss (aTHX_ coro); break;
970 struct coro *prev, *next; 1613 case 1: RETVAL = coro->usecount; break;
1614 }
1615 OUTPUT:
1616 RETVAL
971 1617
972 if (!returnstk)
973 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
974
975 /* set up @_ -- ugly */
976 av_clear (defav);
977 av_fill (defav, items - 1);
978 while (items--)
979 av_store (defav, items, SvREFCNT_inc (ST(items)));
980
981 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
982 sv = av_pop ((AV *)SvRV (returnstk));
983 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
984 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
985 SvREFCNT_dec (sv);
986
987 transfer(aTHX_ prev, next, 0);
988 1618
989MODULE = Coro::State PACKAGE = Coro 1619MODULE = Coro::State PACKAGE = Coro
990 1620
991# this is slightly dirty (should expose a c-level api)
992
993BOOT: 1621BOOT:
994{ 1622{
995 int i; 1623 int i;
1624
1625 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1626 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1627 av_async_pool = get_av ("Coro::async_pool", TRUE);
1628
1629 coro_current = get_sv ("Coro::current", FALSE);
1630 SvREADONLY_on (coro_current);
1631
996 HV *stash = gv_stashpv ("Coro", TRUE); 1632 coro_stash = gv_stashpv ("Coro", TRUE);
997 1633
998 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1634 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
999 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1635 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1000 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1636 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1001 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1637 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1002 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1638 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1003 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1639 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1004
1005 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1006 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1007 1640
1008 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1641 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1009 coro_ready[i] = newAV (); 1642 coro_ready[i] = newAV ();
1010 1643
1011 { 1644 {
1012 SV *sv = perl_get_sv("Coro::API", 1); 1645 SV *sv = perl_get_sv("Coro::API", 1);
1013 1646
1014 coroapi.schedule = api_schedule; 1647 coroapi.schedule = api_schedule;
1648 coroapi.cede = api_cede;
1649 coroapi.cede_notself = api_cede_notself;
1015 coroapi.ready = api_ready; 1650 coroapi.ready = api_ready;
1651 coroapi.is_ready = api_is_ready;
1016 coroapi.nready = &coro_nready; 1652 coroapi.nready = &coro_nready;
1017 coroapi.current = coro_current; 1653 coroapi.current = coro_current;
1018 1654
1019 GCoroAPI = &coroapi; 1655 GCoroAPI = &coroapi;
1020 sv_setiv(sv, (IV)&coroapi); 1656 sv_setiv (sv, (IV)&coroapi);
1021 SvREADONLY_on(sv); 1657 SvREADONLY_on (sv);
1022 } 1658 }
1023} 1659}
1024 1660
1025void 1661void
1026ready(self) 1662_set_current (SV *current)
1027 SV * self 1663 PROTOTYPE: $
1028 CODE: 1664 CODE:
1029 api_ready (self); 1665 SvREFCNT_dec (SvRV (coro_current));
1666 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1030 1667
1031int 1668int
1669prio (Coro::State coro, int newprio = 0)
1670 ALIAS:
1671 nice = 1
1672 CODE:
1673{
1674 RETVAL = coro->prio;
1675
1676 if (items > 1)
1677 {
1678 if (ix)
1679 newprio = coro->prio - newprio;
1680
1681 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1682 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1683
1684 coro->prio = newprio;
1685 }
1686}
1687 OUTPUT:
1688 RETVAL
1689
1690SV *
1691ready (SV *self)
1692 PROTOTYPE: $
1693 CODE:
1694 RETVAL = boolSV (api_ready (self));
1695 OUTPUT:
1696 RETVAL
1697
1698int
1032nready(...) 1699nready (...)
1033 PROTOTYPE: 1700 PROTOTYPE:
1034 CODE: 1701 CODE:
1035 RETVAL = coro_nready; 1702 RETVAL = coro_nready;
1036 OUTPUT: 1703 OUTPUT:
1037 RETVAL 1704 RETVAL
1038 1705
1706# for async_pool speedup
1039void 1707void
1040schedule(...) 1708_pool_1 (SV *cb)
1041 PROTOTYPE:
1042 ALIAS:
1043 cede = 1
1044 CODE: 1709 CODE:
1045 api_schedule (ix); 1710{
1711 int i, len;
1712 HV *hv = (HV *)SvRV (coro_current);
1713 AV *defav = GvAV (PL_defgv);
1714 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1715 AV *invoke_av;
1046 1716
1717 if (!invoke)
1718 croak ("\3terminate\2\n");
1719
1720 hv_store (hv, "desc", sizeof ("desc") - 1,
1721 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1722
1723 invoke_av = (AV *)SvRV (invoke);
1724 len = av_len (invoke_av);
1725
1726 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1727
1728 if (len > 0)
1729 {
1730 av_fill (defav, len - 1);
1731 for (i = 0; i < len; ++i)
1732 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1733 }
1734
1735 SvREFCNT_dec (invoke);
1736}
1737
1738void
1739_pool_2 (SV *cb)
1740 CODE:
1741{
1742 struct coro *coro = SvSTATE (coro_current);
1743
1744 sv_setsv (cb, &PL_sv_undef);
1745
1746 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1747 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1748 croak ("\3terminate\2\n");
1749
1750 av_clear (GvAV (PL_defgv));
1751 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1752 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1753
1754 coro->prio = 0;
1755
1756 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1757 api_trace (coro_current, 0);
1758
1759 av_push (av_async_pool, newSVsv (coro_current));
1760}
1761
1762
1763MODULE = Coro::State PACKAGE = Coro::AIO
1764
1765SV *
1766_get_state ()
1767 CODE:
1768{
1769 struct io_state *data;
1770
1771 RETVAL = newSV (sizeof (struct io_state));
1772 data = (struct io_state *)SvPVX (RETVAL);
1773 SvCUR_set (RETVAL, sizeof (struct io_state));
1774 SvPOK_only (RETVAL);
1775
1776 data->errorno = errno;
1777 data->laststype = PL_laststype;
1778 data->laststatval = PL_laststatval;
1779 data->statcache = PL_statcache;
1780}
1781 OUTPUT:
1782 RETVAL
1783
1784void
1785_set_state (char *data_)
1786 PROTOTYPE: $
1787 CODE:
1788{
1789 struct io_state *data = (void *)data_;
1790
1791 errno = data->errorno;
1792 PL_laststype = data->laststype;
1793 PL_laststatval = data->laststatval;
1794 PL_statcache = data->statcache;
1795}
1796

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