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Comparing Coro/Coro/State.xs (file contents):
Revision 1.24 by root, Tue Aug 14 14:56:22 2001 UTC vs.
Revision 1.167 by root, Thu Sep 27 15:52:31 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... */ 137/* async_pool helper stuff */
138static SV *sv_pool_rss;
139static SV *sv_pool_size;
140static AV *av_async_pool;
141
142static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle;
144
145enum {
146 CC_MAPPED = 0x01,
147 CC_NOREUSE = 0x02, /* throw this away after tracing */
148 CC_TRACE = 0x04,
149 CC_TRACE_SUB = 0x08, /* trace sub calls */
150 CC_TRACE_LINE = 0x10, /* trace each statement */
151 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
152};
153
154/* this is a structure representing a c-level coroutine */
38typedef struct { 155typedef struct coro_cctx {
39 int refcnt; /* pointer reference counter */ 156 struct coro_cctx *next;
40 int usecnt; /* shared by how many coroutines */
41 int gencnt; /* generation counter */
42 157
158 /* the stack */
159 void *sptr;
160 size_t ssize;
161
162 /* cpu state */
163 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
164 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
165 JMPENV *top_env;
43 coro_context cctx; 166 coro_context cctx;
44 167
45 void *sptr; 168#if CORO_USE_VALGRIND
46 long ssize; /* positive == mmap, otherwise malloc */ 169 int valgrind_id;
47} coro_stack; 170#endif
171 unsigned char flags;
172} coro_cctx;
48 173
174enum {
175 CF_RUNNING = 0x0001, /* coroutine is running */
176 CF_READY = 0x0002, /* coroutine is ready */
177 CF_NEW = 0x0004, /* has never been switched to */
178 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
179};
180
181/* this is a structure representing a perl-level coroutine */
49struct coro { 182struct coro {
50 /* the optional C context */ 183 /* the c coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 184 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;
91 185
92 /* data associated with this coroutine (initial args) */ 186 /* data associated with this coroutine (initial args) */
93 AV *args; 187 AV *args;
188 int refcnt;
189 int save; /* CORO_SAVE flags */
190 int flags; /* CF_ flags */
191
192 /* optionally saved, might be zero */
193 AV *defav; /* @_ */
194 SV *defsv; /* $_ */
195 SV *errsv; /* $@ */
196 GV *deffh; /* default filehandle */
197 SV *irssv; /* $/ */
198 SV *irssv_sv; /* real $/ cache */
199
200#define VAR(name,type) type name;
201# include "state.h"
202#undef VAR
203
204 /* coro process data */
205 int prio;
206
207 /* linked list */
208 struct coro *next, *prev;
209 HV *hv; /* the perl hash associated with this coro, if any */
94}; 210};
95 211
96typedef struct coro *Coro__State; 212typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 213typedef 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 AV *
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 else
760 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
761}
762
763static void
764api_transfer(pTHX_ SV *prev, SV *next, int flags)
765{
766 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),
767 sv_to_coro (next, "Coro::transfer", "next"),
768 flags);
769}
770 214
771/** Coro ********************************************************************/ 215/** Coro ********************************************************************/
772 216
773#define PRIO_MAX 3 217#define PRIO_MAX 3
774#define PRIO_HIGH 1 218#define PRIO_HIGH 1
… …
776#define PRIO_LOW -1 220#define PRIO_LOW -1
777#define PRIO_IDLE -3 221#define PRIO_IDLE -3
778#define PRIO_MIN -4 222#define PRIO_MIN -4
779 223
780/* for Coro.pm */ 224/* for Coro.pm */
781static GV *coro_current, *coro_idle; 225static SV *coro_current;
782static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 226static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
227static int coro_nready;
228static struct coro *coro_first;
229
230/** lowlevel stuff **********************************************************/
231
232static AV *
233coro_clone_padlist (pTHX_ CV *cv)
234{
235 AV *padlist = CvPADLIST (cv);
236 AV *newpadlist, *newpad;
237
238 newpadlist = newAV ();
239 AvREAL_off (newpadlist);
240#if PERL_VERSION_ATLEAST (5,9,0)
241 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
242#else
243 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
244#endif
245 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
246 --AvFILLp (padlist);
247
248 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
249 av_store (newpadlist, 1, (SV *)newpad);
250
251 return newpadlist;
252}
783 253
784static void 254static void
785coro_enq (SV *sv) 255free_padlist (pTHX_ AV *padlist)
786{ 256{
787 if (SvROK (sv)) 257 /* may be during global destruction */
258 if (SvREFCNT (padlist))
788 { 259 {
789 SV *hv = SvRV (sv); 260 I32 i = AvFILLp (padlist);
790 if (SvTYPE (hv) == SVt_PVHV) 261 while (i >= 0)
791 { 262 {
792 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 263 SV **svp = av_fetch (padlist, i--, FALSE);
793 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 264 if (svp)
265 {
266 SV *sv;
267 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
268 SvREFCNT_dec (sv);
794 269
795 prio = prio > PRIO_MAX ? PRIO_MAX 270 SvREFCNT_dec (*svp);
796 : prio < PRIO_MIN ? PRIO_MIN 271 }
797 : prio;
798
799 av_push (coro_ready [prio - PRIO_MIN], sv);
800
801 return;
802 } 272 }
273
274 SvREFCNT_dec ((SV*)padlist);
275 }
276}
277
278static int
279coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
280{
281 AV *padlist;
282 AV *av = (AV *)mg->mg_obj;
283
284 /* casting is fun. */
285 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
286 free_padlist (aTHX_ padlist);
287
288 SvREFCNT_dec (av);
289
290 return 0;
291}
292
293#define PERL_MAGIC_coro PERL_MAGIC_ext
294
295static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
296
297#define CORO_MAGIC(cv) \
298 SvMAGIC (cv) \
299 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
300 ? SvMAGIC (cv) \
301 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
302 : 0
303
304/* the next two functions merely cache the padlists */
305static void
306get_padlist (pTHX_ CV *cv)
307{
308 MAGIC *mg = CORO_MAGIC (cv);
309 AV *av;
310
311 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
312 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
313 else
314 {
315#if CORO_PREFER_PERL_FUNCTIONS
316 /* this is probably cleaner, but also slower? */
317 CV *cp = Perl_cv_clone (cv);
318 CvPADLIST (cv) = CvPADLIST (cp);
319 CvPADLIST (cp) = 0;
320 SvREFCNT_dec (cp);
321#else
322 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
323#endif
803 } 324 }
325}
804 326
805 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 327static void
328put_padlist (pTHX_ CV *cv)
329{
330 MAGIC *mg = CORO_MAGIC (cv);
331 AV *av;
332
333 if (!mg)
334 {
335 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
336 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
337 mg->mg_virtual = &vtbl_coro;
338 mg->mg_obj = (SV *)newAV ();
339 }
340
341 av = (AV *)mg->mg_obj;
342
343 if (AvFILLp (av) >= AvMAX (av))
344 av_extend (av, AvMAX (av) + 1);
345
346 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
347}
348
349/** load & save, init *******************************************************/
350
351#define SB do {
352#define SE } while (0)
353
354#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
355
356static void
357load_perl (pTHX_ Coro__State c)
358{
359#define VAR(name,type) PL_ ## name = c->name;
360# include "state.h"
361#undef VAR
362
363 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
364 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
365 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
366 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
367
368 if (c->irssv)
369 {
370 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
371 {
372 SvREFCNT_dec (c->irssv);
373 c->irssv = 0;
374 }
375 else
376 {
377 REPLACE_SV (PL_rs, c->irssv);
378 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
379 sv_setsv (c->irssv_sv, PL_rs);
380 }
381 }
382
383 {
384 dSP;
385 CV *cv;
386
387 /* now do the ugly restore mess */
388 while ((cv = (CV *)POPs))
389 {
390 put_padlist (aTHX_ cv); /* mark this padlist as available */
391 CvDEPTH (cv) = PTR2IV (POPs);
392 CvPADLIST (cv) = (AV *)POPs;
393 }
394
395 PUTBACK;
396 }
397}
398
399static void
400save_perl (pTHX_ Coro__State c)
401{
402 {
403 dSP;
404 I32 cxix = cxstack_ix;
405 PERL_CONTEXT *ccstk = cxstack;
406 PERL_SI *top_si = PL_curstackinfo;
407
408 /*
409 * the worst thing you can imagine happens first - we have to save
410 * (and reinitialize) all cv's in the whole callchain :(
411 */
412
413 XPUSHs (Nullsv);
414 /* this loop was inspired by pp_caller */
415 for (;;)
416 {
417 while (cxix >= 0)
418 {
419 PERL_CONTEXT *cx = &ccstk[cxix--];
420
421 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
422 {
423 CV *cv = cx->blk_sub.cv;
424
425 if (CvDEPTH (cv))
426 {
427 EXTEND (SP, 3);
428 PUSHs ((SV *)CvPADLIST (cv));
429 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
430 PUSHs ((SV *)cv);
431
432 CvDEPTH (cv) = 0;
433 get_padlist (aTHX_ cv);
434 }
435 }
436 }
437
438 if (top_si->si_type == PERLSI_MAIN)
439 break;
440
441 top_si = top_si->si_prev;
442 ccstk = top_si->si_cxstack;
443 cxix = top_si->si_cxix;
444 }
445
446 PUTBACK;
447 }
448
449 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
450 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
451 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
452 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
453 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
454
455#define VAR(name,type)c->name = PL_ ## name;
456# include "state.h"
457#undef VAR
458}
459
460/*
461 * allocate various perl stacks. This is an exact copy
462 * of perl.c:init_stacks, except that it uses less memory
463 * on the (sometimes correct) assumption that coroutines do
464 * not usually need a lot of stackspace.
465 */
466#if CORO_PREFER_PERL_FUNCTIONS
467# define coro_init_stacks init_stacks
468#else
469static void
470coro_init_stacks (pTHX)
471{
472 PL_curstackinfo = new_stackinfo(64, 6);
473 PL_curstackinfo->si_type = PERLSI_MAIN;
474 PL_curstack = PL_curstackinfo->si_stack;
475 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
476
477 PL_stack_base = AvARRAY(PL_curstack);
478 PL_stack_sp = PL_stack_base;
479 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
480
481 New(50,PL_tmps_stack,64,SV*);
482 PL_tmps_floor = -1;
483 PL_tmps_ix = -1;
484 PL_tmps_max = 64;
485
486 New(54,PL_markstack,16,I32);
487 PL_markstack_ptr = PL_markstack;
488 PL_markstack_max = PL_markstack + 16;
489
490#ifdef SET_MARK_OFFSET
491 SET_MARK_OFFSET;
492#endif
493
494 New(54,PL_scopestack,16,I32);
495 PL_scopestack_ix = 0;
496 PL_scopestack_max = 16;
497
498 New(54,PL_savestack,64,ANY);
499 PL_savestack_ix = 0;
500 PL_savestack_max = 64;
501
502#if !PERL_VERSION_ATLEAST (5,9,0)
503 New(54,PL_retstack,4,OP*);
504 PL_retstack_ix = 0;
505 PL_retstack_max = 4;
506#endif
507}
508#endif
509
510/*
511 * destroy the stacks, the callchain etc...
512 */
513static void
514coro_destroy_stacks (pTHX)
515{
516 if (!IN_DESTRUCT)
517 {
518 /* restore all saved variables and stuff */
519 LEAVE_SCOPE (0);
520 assert (PL_tmps_floor == -1);
521
522 /* free all temporaries */
523 FREETMPS;
524 assert (PL_tmps_ix == -1);
525
526 /* unwind all extra stacks */
527 POPSTACK_TO (PL_mainstack);
528
529 /* unwind main stack */
530 dounwind (-1);
531 }
532
533 while (PL_curstackinfo->si_next)
534 PL_curstackinfo = PL_curstackinfo->si_next;
535
536 while (PL_curstackinfo)
537 {
538 PERL_SI *p = PL_curstackinfo->si_prev;
539
540 if (!IN_DESTRUCT)
541 SvREFCNT_dec (PL_curstackinfo->si_stack);
542
543 Safefree (PL_curstackinfo->si_cxstack);
544 Safefree (PL_curstackinfo);
545 PL_curstackinfo = p;
546 }
547
548 Safefree (PL_tmps_stack);
549 Safefree (PL_markstack);
550 Safefree (PL_scopestack);
551 Safefree (PL_savestack);
552#if !PERL_VERSION_ATLEAST (5,9,0)
553 Safefree (PL_retstack);
554#endif
555}
556
557static size_t
558coro_rss (struct coro *coro)
559{
560 size_t rss = sizeof (coro);
561
562 if (coro->mainstack)
563 {
564 if (coro->flags & CF_RUNNING)
565 {
566 #define VAR(name,type)coro->name = PL_ ## name;
567 # include "state.h"
568 #undef VAR
569 }
570
571 rss += sizeof (coro->curstackinfo);
572 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
573 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
574 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
575 rss += coro->tmps_max * sizeof (SV *);
576 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
577 rss += coro->scopestack_max * sizeof (I32);
578 rss += coro->savestack_max * sizeof (ANY);
579
580#if !PERL_VERSION_ATLEAST (5,9,0)
581 rss += coro->retstack_max * sizeof (OP *);
582#endif
583 }
584
585 return rss;
586}
587
588/** coroutine stack handling ************************************************/
589
590static void
591setup_coro (pTHX_ struct coro *coro)
592{
593 /*
594 * emulate part of the perl startup here.
595 */
596 coro_init_stacks (aTHX);
597
598 PL_curcop = &PL_compiling;
599 PL_in_eval = EVAL_NULL;
600 PL_comppad = 0;
601 PL_curpm = 0;
602 PL_localizing = 0;
603 PL_dirty = 0;
604 PL_restartop = 0;
605
606 {
607 dSP;
608 LOGOP myop;
609
610 SvREFCNT_dec (GvAV (PL_defgv));
611 GvAV (PL_defgv) = coro->args; coro->args = 0;
612
613 Zero (&myop, 1, LOGOP);
614 myop.op_next = Nullop;
615 myop.op_flags = OPf_WANT_VOID;
616
617 PUSHMARK (SP);
618 XPUSHs (av_shift (GvAV (PL_defgv)));
619 PUTBACK;
620 PL_op = (OP *)&myop;
621 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
622 SPAGAIN;
623 }
624
625 ENTER; /* necessary e.g. for dounwind */
626}
627
628static void
629free_coro_mortal (pTHX)
630{
631 if (coro_mortal)
632 {
633 SvREFCNT_dec (coro_mortal);
634 coro_mortal = 0;
635 }
636}
637
638static int
639runops_coro (pTHX)
640{
641 COP *oldcop = 0;
642 int oldcxix = -2;
643
644 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
645 {
646 PERL_ASYNC_CHECK ();
647
648 if (PL_op->op_type == OP_LEAVESUB)
649 {
650 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
651 SV **bot, **top;
652 AV *av = newAV (); /* return values */
653 runops_proc_t old_runops = PL_runops;
654 dSP;
655 ENTER;
656 SAVETMPS;
657 EXTEND (SP, 3);
658 PL_runops = RUNOPS_DEFAULT;
659
660 GV *gv = CvGV (cx->blk_sub.cv);
661 SV *fullname = sv_2mortal (newSV (0));
662 if (isGV (gv))
663 gv_efullname3 (fullname, gv, 0);
664
665 bot = PL_stack_base + cx->blk_oldsp + 1;
666 top = cx->blk_gimme == G_ARRAY ? SP + 1
667 : cx->blk_gimme == G_SCALAR ? bot + 1
668 : bot;
669
670 while (bot < top)
671 av_push (av, SvREFCNT_inc (*bot++));
672
673 PUSHMARK (SP);
674 PUSHs (&PL_sv_no);
675 PUSHs (fullname);
676 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
677 PUTBACK;
678 call_pv ("Coro::_do_trace_sub", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
679 SPAGAIN;
680
681 FREETMPS;
682 LEAVE;
683 PL_runops = old_runops;
684 }
685
686 if (oldcop != PL_curcop)
687 {
688 oldcop = PL_curcop;
689
690 if (PL_curcop != &PL_compiling)
691 {
692 runops_proc_t old_runops = PL_runops;
693 dSP;
694 ENTER;
695 SAVETMPS;
696 EXTEND (SP, 3);
697 PL_runops = RUNOPS_DEFAULT;
698
699 if (oldcxix != cxstack_ix)
700 {
701 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
702
703 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
704 {
705 GV *gv = CvGV (cx->blk_sub.cv);
706 SV *fullname = sv_2mortal (newSV (0));
707 if (isGV (gv))
708 gv_efullname3 (fullname, gv, 0);
709
710 PUSHMARK (SP);
711 PUSHs (&PL_sv_yes);
712 PUSHs (fullname);
713 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
714 PUTBACK;
715 call_pv ("Coro::_do_trace_sub", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
716 SPAGAIN;
717 }
718
719 oldcxix = cxstack_ix;
720 }
721
722 if (0) {
723 PUSHMARK (SP);
724 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
725 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
726 PUTBACK;
727 call_pv ("Coro::_do_trace_line", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
728 SPAGAIN;
729 }
730
731 FREETMPS;
732 LEAVE;
733 PL_runops = old_runops;
734 }
735 }
736 }
737
738 TAINT_NOT;
739 return 0;
740}
741
742/* inject a fake call to Coro::State::_cctx_init into the execution */
743/* _cctx_init should be careful, as it could be called at almost any time */
744/* during execution of a perl program */
745static void NOINLINE
746prepare_cctx (pTHX_ coro_cctx *cctx)
747{
748 dSP;
749 LOGOP myop;
750
751 PL_top_env = &PL_start_env;
752
753 if (cctx->flags & CC_TRACE)
754 PL_runops = runops_coro;
755
756 Zero (&myop, 1, LOGOP);
757 myop.op_next = PL_op;
758 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
759
760 PUSHMARK (SP);
761 EXTEND (SP, 2);
762 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
763 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
764 PUTBACK;
765 PL_op = (OP *)&myop;
766 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
767 SPAGAIN;
768}
769
770/*
771 * this is a _very_ stripped down perl interpreter ;)
772 */
773static void
774coro_run (void *arg)
775{
776 dTHX;
777
778 /* coro_run is the alternative tail of transfer(), so unlock here. */
779 UNLOCK;
780
781 /* we now skip the entersub that lead to transfer() */
782 PL_op = PL_op->op_next;
783
784 /* inject a fake subroutine call to cctx_init */
785 prepare_cctx (aTHX_ (coro_cctx *)arg);
786
787 /* somebody or something will hit me for both perl_run and PL_restartop */
788 PL_restartop = PL_op;
789 perl_run (PL_curinterp);
790
791 /*
792 * If perl-run returns we assume exit() was being called or the coro
793 * fell off the end, which seems to be the only valid (non-bug)
794 * reason for perl_run to return. We try to exit by jumping to the
795 * bootstrap-time "top" top_env, as we cannot restore the "main"
796 * coroutine as Coro has no such concept
797 */
798 PL_top_env = main_top_env;
799 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
800}
801
802static coro_cctx *
803cctx_new ()
804{
805 coro_cctx *cctx;
806 void *stack_start;
807 size_t stack_size;
808
809 ++cctx_count;
810
811 Newz (0, cctx, 1, coro_cctx);
812
813#if HAVE_MMAP
814
815 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
816 /* mmap supposedly does allocate-on-write for us */
817 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
818
819 if (cctx->sptr != (void *)-1)
820 {
821# if CORO_STACKGUARD
822 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
823# endif
824 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
825 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
826 cctx->flags |= CC_MAPPED;
827 }
828 else
829#endif
830 {
831 cctx->ssize = coro_stacksize * (long)sizeof (long);
832 New (0, cctx->sptr, coro_stacksize, long);
833
834 if (!cctx->sptr)
835 {
836 perror ("FATAL: unable to allocate stack for coroutine");
837 _exit (EXIT_FAILURE);
838 }
839
840 stack_start = cctx->sptr;
841 stack_size = cctx->ssize;
842 }
843
844 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
845 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
846
847 return cctx;
848}
849
850static void
851cctx_destroy (coro_cctx *cctx)
852{
853 if (!cctx)
854 return;
855
856 --cctx_count;
857
858#if CORO_USE_VALGRIND
859 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
860#endif
861
862#if HAVE_MMAP
863 if (cctx->flags & CC_MAPPED)
864 munmap (cctx->sptr, cctx->ssize);
865 else
866#endif
867 Safefree (cctx->sptr);
868
869 Safefree (cctx);
870}
871
872static coro_cctx *
873cctx_get (pTHX)
874{
875 while (cctx_first)
876 {
877 coro_cctx *cctx = cctx_first;
878 cctx_first = cctx->next;
879 --cctx_idle;
880
881 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
882 return cctx;
883
884 cctx_destroy (cctx);
885 }
886
887 return cctx_new ();
888}
889
890static void
891cctx_put (coro_cctx *cctx)
892{
893 /* free another cctx if overlimit */
894 if (cctx_idle >= MAX_IDLE_CCTX)
895 {
896 coro_cctx *first = cctx_first;
897 cctx_first = first->next;
898 --cctx_idle;
899
900 cctx_destroy (first);
901 }
902
903 ++cctx_idle;
904 cctx->next = cctx_first;
905 cctx_first = cctx;
906}
907
908/** coroutine switching *****************************************************/
909
910/* never call directly, always through the coro_state_transfer global variable */
911static void NOINLINE
912transfer (pTHX_ struct coro *prev, struct coro *next)
913{
914 dSTACKLEVEL;
915
916 /* sometimes transfer is only called to set idle_sp */
917 if (!next)
918 {
919 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
920 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
921 }
922 else if (prev != next)
923 {
924 coro_cctx *prev__cctx;
925
926 if (prev->flags & CF_NEW)
927 {
928 /* create a new empty context */
929 Newz (0, prev->cctx, 1, coro_cctx);
930 prev->flags &= ~CF_NEW;
931 prev->flags |= CF_RUNNING;
932 }
933
934 /*TODO: must not croak here */
935 if (!prev->flags & CF_RUNNING)
936 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
937
938 if (next->flags & CF_RUNNING)
939 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
940
941 if (next->flags & CF_DESTROYED)
942 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
943
944 prev->flags &= ~CF_RUNNING;
945 next->flags |= CF_RUNNING;
946
947 LOCK;
948
949 if (next->flags & CF_NEW)
950 {
951 /* need to start coroutine */
952 next->flags &= ~CF_NEW;
953 /* first get rid of the old state */
954 save_perl (aTHX_ prev);
955 /* setup coroutine call */
956 setup_coro (aTHX_ next);
957 }
958 else
959 {
960 /* coroutine already started */
961 save_perl (aTHX_ prev);
962 load_perl (aTHX_ next);
963 }
964
965 prev__cctx = prev->cctx;
966
967 /* possibly "free" the cctx */
968 if (prev__cctx->idle_sp == STACKLEVEL)
969 {
970 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
971 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
972
973 prev->cctx = 0;
974
975 cctx_put (prev__cctx);
976 }
977
978 if (!next->cctx)
979 next->cctx = cctx_get (aTHX);
980
981 if (prev__cctx != next->cctx)
982 {
983 prev__cctx->top_env = PL_top_env;
984 PL_top_env = next->cctx->top_env;
985 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
986 }
987
988 free_coro_mortal (aTHX);
989 UNLOCK;
990 }
991}
992
993struct transfer_args
994{
995 struct coro *prev, *next;
996};
997
998#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
999
1000/** high level stuff ********************************************************/
1001
1002static int
1003coro_state_destroy (pTHX_ struct coro *coro)
1004{
1005 if (coro->flags & CF_DESTROYED)
1006 return 0;
1007
1008 coro->flags |= CF_DESTROYED;
1009
1010 if (coro->flags & CF_READY)
1011 {
1012 /* reduce nready, as destroying a ready coro effectively unreadies it */
1013 /* alternative: look through all ready queues and remove the coro */
1014 LOCK;
1015 --coro_nready;
1016 UNLOCK;
1017 }
1018 else
1019 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1020
1021 if (coro->mainstack && coro->mainstack != main_mainstack)
1022 {
1023 struct coro temp;
1024
1025 assert (!(coro->flags & CF_RUNNING));
1026
1027 Zero (&temp, 1, struct coro);
1028 temp.save = CORO_SAVE_ALL;
1029
1030 if (coro->flags & CF_RUNNING)
1031 croak ("FATAL: tried to destroy currently running coroutine");
1032
1033 save_perl (aTHX_ &temp);
1034 load_perl (aTHX_ coro);
1035
1036 coro_destroy_stacks (aTHX);
1037
1038 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1039
1040 coro->mainstack = 0;
1041 }
1042
1043 cctx_destroy (coro->cctx);
1044 SvREFCNT_dec (coro->args);
1045
1046 if (coro->next) coro->next->prev = coro->prev;
1047 if (coro->prev) coro->prev->next = coro->next;
1048 if (coro == coro_first) coro_first = coro->next;
1049
1050 return 1;
1051}
1052
1053static int
1054coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1055{
1056 struct coro *coro = (struct coro *)mg->mg_ptr;
1057 mg->mg_ptr = 0;
1058
1059 coro->hv = 0;
1060
1061 if (--coro->refcnt < 0)
1062 {
1063 coro_state_destroy (aTHX_ coro);
1064 Safefree (coro);
1065 }
1066
1067 return 0;
1068}
1069
1070static int
1071coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1072{
1073 struct coro *coro = (struct coro *)mg->mg_ptr;
1074
1075 ++coro->refcnt;
1076
1077 return 0;
1078}
1079
1080static MGVTBL coro_state_vtbl = {
1081 0, 0, 0, 0,
1082 coro_state_free,
1083 0,
1084#ifdef MGf_DUP
1085 coro_state_dup,
1086#else
1087# define MGf_DUP 0
1088#endif
1089};
1090
1091static struct coro *
1092SvSTATE_ (pTHX_ SV *coro)
1093{
1094 HV *stash;
1095 MAGIC *mg;
1096
1097 if (SvROK (coro))
1098 coro = SvRV (coro);
1099
1100 stash = SvSTASH (coro);
1101 if (stash != coro_stash && stash != coro_state_stash)
1102 {
1103 /* very slow, but rare, check */
1104 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
1105 croak ("Coro::State object required");
1106 }
1107
1108 mg = CORO_MAGIC (coro);
1109 return (struct coro *)mg->mg_ptr;
1110}
1111
1112#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1113
1114static void
1115prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1116{
1117 ta->prev = SvSTATE (prev_sv);
1118 ta->next = SvSTATE (next_sv);
1119}
1120
1121static void
1122api_transfer (SV *prev_sv, SV *next_sv)
1123{
1124 dTHX;
1125 struct transfer_args ta;
1126
1127 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1128 TRANSFER (ta);
1129}
1130
1131static int
1132api_save (SV *coro_sv, int new_save)
1133{
1134 dTHX;
1135 struct coro *coro = SvSTATE (coro_sv);
1136 int old_save = coro->save;
1137
1138 if (new_save >= 0)
1139 coro->save = new_save;
1140
1141 return old_save;
1142}
1143
1144/** Coro ********************************************************************/
1145
1146static void
1147coro_enq (pTHX_ SV *coro_sv)
1148{
1149 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
806} 1150}
807 1151
808static SV * 1152static SV *
809coro_deq (int min_prio) 1153coro_deq (pTHX_ int min_prio)
810{ 1154{
811 int prio = PRIO_MAX - PRIO_MIN; 1155 int prio = PRIO_MAX - PRIO_MIN;
812 1156
813 min_prio -= PRIO_MIN; 1157 min_prio -= PRIO_MIN;
814 if (min_prio < 0) 1158 if (min_prio < 0)
815 min_prio = 0; 1159 min_prio = 0;
816 1160
817 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1161 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
818 if (av_len (coro_ready[prio]) >= 0) 1162 if (AvFILLp (coro_ready [prio]) >= 0)
819 return av_shift (coro_ready[prio]); 1163 return av_shift (coro_ready [prio]);
820 1164
821 return 0; 1165 return 0;
822} 1166}
823 1167
1168static int
1169api_ready (SV *coro_sv)
1170{
1171 dTHX;
1172 struct coro *coro;
1173
1174 if (SvROK (coro_sv))
1175 coro_sv = SvRV (coro_sv);
1176
1177 coro = SvSTATE (coro_sv);
1178
1179 if (coro->flags & CF_READY)
1180 return 0;
1181
1182 coro->flags |= CF_READY;
1183
1184 LOCK;
1185 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1186 ++coro_nready;
1187 UNLOCK;
1188
1189 return 1;
1190}
1191
1192static int
1193api_is_ready (SV *coro_sv)
1194{
1195 dTHX;
1196 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1197}
1198
824static void 1199static void
825api_ready (SV *coro) 1200prepare_schedule (pTHX_ struct transfer_args *ta)
826{ 1201{
827 coro_enq (SvREFCNT_inc (coro)); 1202 SV *prev_sv, *next_sv;
1203
1204 for (;;)
1205 {
1206 LOCK;
1207 next_sv = coro_deq (aTHX_ PRIO_MIN);
1208
1209 /* nothing to schedule: call the idle handler */
1210 if (!next_sv)
1211 {
1212 dSP;
1213 UNLOCK;
1214
1215 ENTER;
1216 SAVETMPS;
1217
1218 PUSHMARK (SP);
1219 PUTBACK;
1220 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1221
1222 FREETMPS;
1223 LEAVE;
1224 continue;
1225 }
1226
1227 ta->next = SvSTATE (next_sv);
1228
1229 /* cannot transfer to destroyed coros, skip and look for next */
1230 if (ta->next->flags & CF_DESTROYED)
1231 {
1232 UNLOCK;
1233 SvREFCNT_dec (next_sv);
1234 /* coro_nready is already taken care of by destroy */
1235 continue;
1236 }
1237
1238 --coro_nready;
1239 UNLOCK;
1240 break;
1241 }
1242
1243 /* free this only after the transfer */
1244 prev_sv = SvRV (coro_current);
1245 SvRV_set (coro_current, next_sv);
1246 ta->prev = SvSTATE (prev_sv);
1247
1248 assert (ta->next->flags & CF_READY);
1249 ta->next->flags &= ~CF_READY;
1250
1251 LOCK;
1252 free_coro_mortal (aTHX);
1253 coro_mortal = prev_sv;
1254 UNLOCK;
828} 1255}
829 1256
830static void 1257static void
831api_schedule (int cede) 1258prepare_cede (pTHX_ struct transfer_args *ta)
832{ 1259{
833 SV *prev, *next; 1260 api_ready (coro_current);
1261 prepare_schedule (aTHX_ ta);
1262}
834 1263
1264static int
1265prepare_cede_notself (pTHX_ struct transfer_args *ta)
1266{
1267 if (coro_nready)
1268 {
835 prev = GvSV (coro_current); 1269 SV *prev = SvRV (coro_current);
1270 prepare_schedule (aTHX_ ta);
1271 api_ready (prev);
1272 return 1;
1273 }
1274 else
1275 return 0;
1276}
836 1277
837 if (cede) 1278static void
838 coro_enq (SvREFCNT_inc (prev)); 1279api_schedule (void)
1280{
1281 dTHX;
1282 struct transfer_args ta;
839 1283
840 next = coro_deq (PRIO_MIN); 1284 prepare_schedule (aTHX_ &ta);
1285 TRANSFER (ta);
1286}
841 1287
842 if (!next) 1288static int
843 next = SvREFCNT_inc (GvSV (coro_idle)); 1289api_cede (void)
1290{
1291 dTHX;
1292 struct transfer_args ta;
844 1293
845 GvSV (coro_current) = SvREFCNT_inc (next); 1294 prepare_cede (aTHX_ &ta);
846 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 1295
847 sv_to_coro (next, "Coro::schedule", "next coroutine"), 1296 if (ta.prev != ta.next)
848 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1297 {
849 SvREFCNT_dec (next); 1298 TRANSFER (ta);
850 SvREFCNT_dec (prev); 1299 return 1;
1300 }
1301 else
1302 return 0;
1303}
1304
1305static int
1306api_cede_notself (void)
1307{
1308 dTHX;
1309 struct transfer_args ta;
1310
1311 if (prepare_cede_notself (aTHX_ &ta))
1312 {
1313 TRANSFER (ta);
1314 return 1;
1315 }
1316 else
1317 return 0;
851} 1318}
852 1319
853MODULE = Coro::State PACKAGE = Coro::State 1320MODULE = Coro::State PACKAGE = Coro::State
854 1321
855PROTOTYPES: ENABLE 1322PROTOTYPES: DISABLE
856 1323
857BOOT: 1324BOOT:
858{ /* {} necessary for stoopid perl-5.6.x */ 1325{
859 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1326#ifdef USE_ITHREADS
860 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1327 MUTEX_INIT (&coro_mutex);
1328#endif
1329 BOOT_PAGESIZE;
1330
861 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1331 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
862 1332
1333 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1334 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1335 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1336 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1337
863 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1338 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
864 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1339 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
865 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1340 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1341 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1342 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
866 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1343 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
867 1344 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
868 if (!padlist_cache)
869 padlist_cache = newHV ();
870 1345
871 main_mainstack = PL_mainstack; 1346 main_mainstack = PL_mainstack;
1347 main_top_env = PL_top_env;
872 1348
873 { 1349 while (main_top_env->je_prev)
874 SV *sv = perl_get_sv("Coro::API", 1); 1350 main_top_env = main_top_env->je_prev;
875 1351
876 coroapi.ver = CORO_API_VERSION - 1; 1352 coroapi.ver = CORO_API_VERSION;
877 coroapi.transfer = api_transfer; 1353 coroapi.transfer = api_transfer;
878 coroapi.schedule = api_schedule;
879 coroapi.ready = api_ready;
880 1354
881 GCoroAPI = &coroapi; 1355 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
882 sv_setiv(sv, (IV)&coroapi);
883 SvREADONLY_on(sv);
884 }
885} 1356}
886 1357
887Coro::State 1358SV *
888_newprocess(args) 1359new (char *klass, ...)
889 SV * args
890 PROTOTYPE: $
891 CODE: 1360 CODE:
892 Coro__State coro; 1361{
1362 struct coro *coro;
1363 HV *hv;
1364 int i;
893 1365
894 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
895 croak ("Coro::State::_newprocess expects an arrayref");
896
897 New (0, coro, 1, struct coro); 1366 Newz (0, coro, 1, struct coro);
1367 coro->args = newAV ();
1368 coro->save = CORO_SAVE_DEF;
1369 coro->flags = CF_NEW;
898 1370
899 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1371 if (coro_first) coro_first->prev = coro;
900 coro->mainstack = 0; /* actual work is done inside transfer */ 1372 coro->next = coro_first;
901 coro->stack = 0; 1373 coro_first = coro;
902 1374
903 RETVAL = coro; 1375 coro->hv = hv = newHV ();
1376 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1377 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1378
1379 for (i = 1; i < items; i++)
1380 av_push (coro->args, newSVsv (ST (i)));
1381}
904 OUTPUT: 1382 OUTPUT:
905 RETVAL 1383 RETVAL
906 1384
1385int
1386save (SV *coro, int new_save = -1)
1387 CODE:
1388 RETVAL = api_save (coro, new_save);
1389 OUTPUT:
1390 RETVAL
1391
1392int
1393save_also (SV *coro_sv, int save_also)
1394 CODE:
1395{
1396 struct coro *coro = SvSTATE (coro_sv);
1397 RETVAL = coro->save;
1398 coro->save |= save_also;
1399}
1400 OUTPUT:
1401 RETVAL
1402
907void 1403void
908transfer(prev, next, flags) 1404_set_stacklevel (...)
909 Coro::State_or_hashref prev 1405 ALIAS:
910 Coro::State_or_hashref next 1406 Coro::State::transfer = 1
911 int flags 1407 Coro::schedule = 2
912 PROTOTYPE: @ 1408 Coro::cede = 3
1409 Coro::cede_notself = 4
913 CODE: 1410 CODE:
914 PUTBACK; 1411{
915 transfer (aTHX_ prev, next, flags); 1412 struct transfer_args ta;
916 SPAGAIN; 1413
1414 switch (ix)
1415 {
1416 case 0:
1417 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1418 ta.next = 0;
1419 break;
1420
1421 case 1:
1422 if (items != 2)
1423 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1424
1425 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1426 break;
1427
1428 case 2:
1429 prepare_schedule (aTHX_ &ta);
1430 break;
1431
1432 case 3:
1433 prepare_cede (aTHX_ &ta);
1434 break;
1435
1436 case 4:
1437 if (!prepare_cede_notself (aTHX_ &ta))
1438 XSRETURN_EMPTY;
1439
1440 break;
1441 }
1442
1443 BARRIER;
1444 TRANSFER (ta);
1445
1446 if (GIMME_V != G_VOID && ta.next != ta.prev)
1447 XSRETURN_YES;
1448}
1449
1450bool
1451_destroy (SV *coro_sv)
1452 CODE:
1453 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1454 OUTPUT:
1455 RETVAL
917 1456
918void 1457void
919DESTROY(coro)
920 Coro::State coro
921 CODE:
922
923 if (coro->mainstack && coro->mainstack != main_mainstack)
924 {
925 struct coro temp;
926
927 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
928 LOAD(aTHX_ coro);
929
930 destroy_stacks (aTHX);
931
932 LOAD((&temp)); /* this will get rid of defsv etc.. */
933
934 coro->mainstack = 0;
935 }
936
937 deallocate_stack (coro);
938
939 Safefree (coro);
940
941void
942flush()
943 CODE:
944#ifdef MAY_FLUSH
945 flush_padlist_cache ();
946#endif
947
948void
949_exit(code) 1458_exit (code)
950 int code 1459 int code
951 PROTOTYPE: $ 1460 PROTOTYPE: $
952 CODE: 1461 CODE:
953#if defined(__GLIBC__) || _POSIX_C_SOURCE
954 _exit (code); 1462 _exit (code);
955#else
956 signal (SIGTERM, SIG_DFL);
957 raise (SIGTERM);
958 exit (code);
959#endif
960 1463
961MODULE = Coro::State PACKAGE = Coro::Cont 1464int
1465cctx_stacksize (int new_stacksize = 0)
1466 CODE:
1467 RETVAL = coro_stacksize;
1468 if (new_stacksize)
1469 coro_stacksize = new_stacksize;
1470 OUTPUT:
1471 RETVAL
962 1472
963# this is slightly dirty (should expose a c-level api) 1473int
1474cctx_count ()
1475 CODE:
1476 RETVAL = cctx_count;
1477 OUTPUT:
1478 RETVAL
1479
1480int
1481cctx_idle ()
1482 CODE:
1483 RETVAL = cctx_idle;
1484 OUTPUT:
1485 RETVAL
964 1486
965void 1487void
966yield(...) 1488list ()
967 PROTOTYPE: @ 1489 PPCODE:
1490{
1491 struct coro *coro;
1492 for (coro = coro_first; coro; coro = coro->next)
1493 if (coro->hv)
1494 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1495}
1496
1497void
1498call (Coro::State coro, SV *coderef)
1499 ALIAS:
1500 eval = 1
1501 CODE:
1502{
1503 if (coro->mainstack)
1504 {
1505 struct coro temp;
1506 Zero (&temp, 1, struct coro);
1507 temp.save = CORO_SAVE_ALL;
1508
1509 if (!(coro->flags & CF_RUNNING))
1510 {
1511 save_perl (aTHX_ &temp);
1512 load_perl (aTHX_ coro);
1513 }
1514
1515 {
1516 dSP;
1517 ENTER;
1518 SAVETMPS;
1519 PUSHMARK (SP);
1520 PUTBACK;
1521 if (ix)
1522 eval_sv (coderef, 0);
1523 else
1524 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1525 SPAGAIN;
1526 FREETMPS;
1527 LEAVE;
1528 PUTBACK;
1529 }
1530
1531 if (!(coro->flags & CF_RUNNING))
1532 {
1533 save_perl (aTHX_ coro);
1534 load_perl (aTHX_ &temp);
1535 }
1536 }
1537}
1538
1539SV *
1540is_ready (Coro::State coro)
1541 PROTOTYPE: $
1542 ALIAS:
1543 is_ready = CF_READY
1544 is_running = CF_RUNNING
1545 is_new = CF_NEW
1546 is_destroyed = CF_DESTROYED
1547 CODE:
1548 RETVAL = boolSV (coro->flags & ix);
1549 OUTPUT:
1550 RETVAL
1551
1552void
1553trace (Coro::State coro, int flags = CC_TRACE | CC_TRACE_SUB)
1554 CODE:
1555 if (flags & CC_TRACE)
1556 {
1557 if (!coro->cctx)
1558 coro->cctx = cctx_new ();
1559 else if (!(coro->cctx->flags & CC_TRACE))
1560 croak ("cannot enable tracing on coroutine with custom stack");
1561
1562 coro->cctx->flags |= flags & (CC_TRACE | CC_TRACE_ALL);
1563 }
1564 else
1565 if (coro->cctx && coro->cctx->flags & CC_TRACE)
1566 {
1567 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1568 coro->cctx->flags |= CC_NOREUSE;
1569 }
1570
1571SV *
1572has_stack (Coro::State coro)
1573 PROTOTYPE: $
1574 CODE:
1575 RETVAL = boolSV (!!coro->cctx);
1576 OUTPUT:
1577 RETVAL
1578
1579int
1580is_traced (Coro::State coro)
1581 PROTOTYPE: $
1582 CODE:
1583 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1584 OUTPUT:
1585 RETVAL
1586
1587IV
1588rss (Coro::State coro)
1589 PROTOTYPE: $
968 CODE: 1590 CODE:
969 static SV *returnstk; 1591 RETVAL = coro_rss (coro);
970 SV *sv; 1592 OUTPUT:
971 AV *defav = GvAV (PL_defgv); 1593 RETVAL
972 struct coro *prev, *next;
973 1594
974 if (!returnstk)
975 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
976
977 /* set up @_ -- ugly */
978 av_clear (defav);
979 av_fill (defav, items - 1);
980 while (items--)
981 av_store (defav, items, SvREFCNT_inc (ST(items)));
982
983 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
984 sv = av_pop ((AV *)SvRV (returnstk));
985 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
986 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
987 SvREFCNT_dec (sv);
988
989 transfer(aTHX_ prev, next, 0);
990 1595
991MODULE = Coro::State PACKAGE = Coro 1596MODULE = Coro::State PACKAGE = Coro
992 1597
993# this is slightly dirty (should expose a c-level api)
994
995BOOT: 1598BOOT:
996{ 1599{
997 int i; 1600 int i;
1601
1602 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1603 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1604 av_async_pool = get_av ("Coro::async_pool", TRUE);
1605
1606 coro_current = get_sv ("Coro::current", FALSE);
1607 SvREADONLY_on (coro_current);
1608
998 HV *stash = gv_stashpv ("Coro", TRUE); 1609 coro_stash = gv_stashpv ("Coro", TRUE);
999 1610
1000 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1611 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1001 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1612 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1002 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1613 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1003 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1614 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1004 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1615 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1005 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1616 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1006
1007 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1008 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1009 1617
1010 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1618 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1011 coro_ready[i] = newAV (); 1619 coro_ready[i] = newAV ();
1620
1621 {
1622 SV *sv = perl_get_sv("Coro::API", 1);
1623
1624 coroapi.schedule = api_schedule;
1625 coroapi.save = api_save;
1626 coroapi.cede = api_cede;
1627 coroapi.cede_notself = api_cede_notself;
1628 coroapi.ready = api_ready;
1629 coroapi.is_ready = api_is_ready;
1630 coroapi.nready = &coro_nready;
1631 coroapi.current = coro_current;
1632
1633 GCoroAPI = &coroapi;
1634 sv_setiv (sv, (IV)&coroapi);
1635 SvREADONLY_on (sv);
1636 }
1012} 1637}
1013 1638
1014void 1639void
1015ready(self) 1640_set_current (SV *current)
1016 SV * self 1641 PROTOTYPE: $
1017 CODE: 1642 CODE:
1018 api_ready (self); 1643 SvREFCNT_dec (SvRV (coro_current));
1644 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1019 1645
1646int
1647prio (Coro::State coro, int newprio = 0)
1648 ALIAS:
1649 nice = 1
1650 CODE:
1651{
1652 RETVAL = coro->prio;
1653
1654 if (items > 1)
1655 {
1656 if (ix)
1657 newprio = coro->prio - newprio;
1658
1659 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1660 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1661
1662 coro->prio = newprio;
1663 }
1664}
1665 OUTPUT:
1666 RETVAL
1667
1668SV *
1669ready (SV *self)
1670 PROTOTYPE: $
1671 CODE:
1672 RETVAL = boolSV (api_ready (self));
1673 OUTPUT:
1674 RETVAL
1675
1676int
1677nready (...)
1678 PROTOTYPE:
1679 CODE:
1680 RETVAL = coro_nready;
1681 OUTPUT:
1682 RETVAL
1683
1684# for async_pool speedup
1020void 1685void
1021schedule(...) 1686_pool_1 (SV *cb)
1022 ALIAS:
1023 cede = 1
1024 CODE: 1687 CODE:
1025 api_schedule (ix); 1688{
1689 int i, len;
1690 HV *hv = (HV *)SvRV (coro_current);
1691 AV *defav = GvAV (PL_defgv);
1692 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1693 AV *invoke_av;
1026 1694
1695 if (!invoke)
1696 croak ("\3terminate\2\n");
1697
1698 hv_store (hv, "desc", sizeof ("desc") - 1,
1699 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1700
1701 invoke_av = (AV *)SvRV (invoke);
1702 len = av_len (invoke_av);
1703
1704 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1705
1706 if (len > 0)
1707 {
1708 av_fill (defav, len - 1);
1709 for (i = 0; i < len; ++i)
1710 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1711 }
1712
1713 SvREFCNT_dec (invoke);
1714}
1715
1716void
1717_pool_2 (SV *cb)
1718 CODE:
1719{
1720 struct coro *coro = SvSTATE (coro_current);
1721
1722 sv_setsv (cb, &PL_sv_undef);
1723
1724 if (coro_rss (coro) > SvIV (sv_pool_rss)
1725 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1726 croak ("\3terminate\2\n");
1727
1728 av_clear (GvAV (PL_defgv));
1729 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1730 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1731 coro->save = CORO_SAVE_DEF;
1732 coro->prio = 0;
1733 av_push (av_async_pool, newSVsv (coro_current));
1734}
1735
1736
1737MODULE = Coro::State PACKAGE = Coro::AIO
1738
1739SV *
1740_get_state ()
1741 CODE:
1742{
1743 struct io_state *data;
1744
1745 RETVAL = newSV (sizeof (struct io_state));
1746 data = (struct io_state *)SvPVX (RETVAL);
1747 SvCUR_set (RETVAL, sizeof (struct io_state));
1748 SvPOK_only (RETVAL);
1749
1750 data->errorno = errno;
1751 data->laststype = PL_laststype;
1752 data->laststatval = PL_laststatval;
1753 data->statcache = PL_statcache;
1754}
1755 OUTPUT:
1756 RETVAL
1757
1758void
1759_set_state (char *data_)
1760 PROTOTYPE: $
1761 CODE:
1762{
1763 struct io_state *data = (void *)data_;
1764
1765 errno = data->errorno;
1766 PL_laststype = data->laststype;
1767 PL_laststatval = data->laststatval;
1768 PL_statcache = data->statcache;
1769}
1770

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