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Comparing Coro/Coro/State.xs (file contents):
Revision 1.29 by root, Sat Aug 25 21:40:34 2001 UTC vs.
Revision 1.181 by root, Wed Oct 3 17:37:33 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 and is rarely used */ 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 declare 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 GV *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 transfers to this coro */
207
208 /* coro process data */
209 int prio;
210 //SV *throw;
211
212 /* async_pool */
213 GV *defoutgv;
214
215 /* linked list */
216 struct coro *next, *prev;
217 HV *hv; /* the perl hash associated with this coro, if any */
94}; 218};
95 219
96typedef struct coro *Coro__State; 220typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 221typedef 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) load_state(aTHX_ (state));
276#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
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 c->dowarn = PL_dowarn;
414 c->in_eval = PL_in_eval;
415
416 c->curstackinfo = PL_curstackinfo;
417 c->curstack = PL_curstack;
418 c->mainstack = PL_mainstack;
419 c->stack_sp = PL_stack_sp;
420 c->op = PL_op;
421 c->curpad = PL_curpad;
422 c->stack_base = PL_stack_base;
423 c->stack_max = PL_stack_max;
424 c->tmps_stack = PL_tmps_stack;
425 c->tmps_floor = PL_tmps_floor;
426 c->tmps_ix = PL_tmps_ix;
427 c->tmps_max = PL_tmps_max;
428 c->markstack = PL_markstack;
429 c->markstack_ptr = PL_markstack_ptr;
430 c->markstack_max = PL_markstack_max;
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437 c->retstack = PL_retstack;
438 c->retstack_ix = PL_retstack_ix;
439 c->retstack_max = PL_retstack_max;
440 c->curcop = PL_curcop;
441 c->top_env = PL_top_env;
442}
443
444/*
445 * allocate various perl stacks. This is an exact copy
446 * of perl.c:init_stacks, except that it uses less memory
447 * on the assumption that coroutines do not usually need
448 * a lot of stackspace.
449 */
450STATIC void
451coro_init_stacks (pTHX)
452{
453 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
454 PL_curstackinfo->si_type = PERLSI_MAIN;
455 PL_curstack = PL_curstackinfo->si_stack;
456 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
457
458 PL_stack_base = AvARRAY(PL_curstack);
459 PL_stack_sp = PL_stack_base;
460 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
461
462 New(50,PL_tmps_stack,96,SV*);
463 PL_tmps_floor = -1;
464 PL_tmps_ix = -1;
465 PL_tmps_max = 96;
466
467 New(54,PL_markstack,16,I32);
468 PL_markstack_ptr = PL_markstack;
469 PL_markstack_max = PL_markstack + 16;
470
471 SET_MARK_OFFSET;
472
473 New(54,PL_scopestack,16,I32);
474 PL_scopestack_ix = 0;
475 PL_scopestack_max = 16;
476
477 New(54,PL_savestack,96,ANY);
478 PL_savestack_ix = 0;
479 PL_savestack_max = 96;
480
481 New(54,PL_retstack,8,OP*);
482 PL_retstack_ix = 0;
483 PL_retstack_max = 8;
484}
485
486/*
487 * destroy the stacks, the callchain etc...
488 * still there is a memleak of 128 bytes...
489 */
490STATIC void
491destroy_stacks(pTHX)
492{
493 /* is this ugly, I ask? */
494 while (PL_scopestack_ix)
495 LEAVE;
496
497 /* sure it is, but more important: is it correct?? :/ */
498 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
499 FREETMPS;
500
501 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next;
503
504 while (PL_curstackinfo)
505 {
506 PERL_SI *p = PL_curstackinfo->si_prev;
507
508 {
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
515 dounwind(-1);
516
517 SvREFCNT_dec(PL_curstackinfo->si_stack);
518 Safefree(PL_curstackinfo->si_cxstack);
519 Safefree(PL_curstackinfo);
520 PL_curstackinfo = p;
521 }
522
523 Safefree(PL_tmps_stack);
524 Safefree(PL_markstack);
525 Safefree(PL_scopestack);
526 Safefree(PL_savestack);
527 Safefree(PL_retstack);
528}
529
530static void
531allocate_stack (Coro__State ctx, int alloc)
532{
533 coro_stack *stack;
534
535 New (0, stack, 1, coro_stack);
536
537 stack->refcnt = 1;
538 stack->usecnt = 1;
539 stack->gencnt = ctx->gencnt = 0;
540 if (alloc)
541 {
542#ifdef HAVE_MMAP
543 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
544 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
545 if (stack->sptr == (void *)-1)
546#endif
547 {
548 /*FIXME*//*D*//* reasonable stack size! */
549 stack->ssize = -4096 * sizeof (long);
550 New (0, stack->sptr, 4096, long);
551 }
552 }
553 else
554 stack->sptr = 0;
555
556 ctx->stack = stack;
557}
558
559static void
560deallocate_stack (Coro__State ctx)
561{
562 coro_stack *stack = ctx->stack;
563
564 ctx->stack = 0;
565
566 if (stack)
567 {
568 if (!--stack->refcnt)
569 {
570#ifdef HAVE_MMAP
571 if (stack->ssize > 0 && stack->sptr)
572 munmap (stack->sptr, stack->ssize);
573 else
574#else
575 Safefree (stack->sptr);
576#endif
577 Safefree (stack);
578 }
579 else if (ctx->gencnt == stack->gencnt)
580 --stack->usecnt;
581 }
582}
583
584static void
585setup_coro (void *arg)
586{
587 /*
588 * emulate part of the perl startup here.
589 */
590 dSP;
591 Coro__State ctx = (Coro__State)arg;
592 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
593
594 coro_init_stacks (aTHX);
595 /*PL_curcop = 0;*/
596 /*PL_in_eval = PL_in_eval;*/ /* inherit */
597 SvREFCNT_dec (GvAV (PL_defgv));
598 GvAV (PL_defgv) = ctx->args;
599
600 SPAGAIN;
601
602 if (ctx->stack)
603 {
604 ctx->cursp = 0;
605
606 PUSHMARK(SP);
607 PUTBACK;
608 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
609
610 if (SvTRUE (ERRSV))
611 croak (NULL);
612 else
613 croak ("FATAL: CCTXT coroutine returned!");
614 }
615 else
616 {
617 UNOP myop;
618
619 PL_op = (OP *)&myop;
620
621 Zero(&myop, 1, UNOP);
622 myop.op_next = Nullop;
623 myop.op_flags = OPf_WANT_VOID;
624
625 PUSHMARK(SP);
626 XPUSHs (sub_init);
627 /*
628 * the next line is slightly wrong, as PL_op->op_next
629 * is actually being executed so we skip the first op.
630 * that doesn't matter, though, since it is only
631 * pp_nextstate and we never return...
632 * ah yes, and I don't care anyways ;)
633 */
634 PUTBACK;
635 PL_op = pp_entersub();
636 SPAGAIN;
637
638 ENTER; /* necessary e.g. for dounwind */
639 }
640}
641
642static void
643continue_coro (void *arg)
644{
645 /*
646 * this is a _very_ stripped down perl interpreter ;)
647 */
648 Coro__State ctx = (Coro__State)arg;
649
650 /*FIXME*//* must set up top_env here */
651 ctx->cursp = 0;
652 PL_op = PL_op->op_next;
653 CALLRUNOPS(aTHX);
654
655 abort ();
656}
657
658STATIC void
659transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
660{
661 dSTACKLEVEL;
662 static struct coro *xnext;
663
664 if (prev != next)
665 {
666 xnext = next;
667
668 if (next->mainstack)
669 {
670 SAVE (prev, flags);
671 LOAD (next);
672
673 /* mark this state as in-use */
674 next->mainstack = 0;
675 next->tmps_ix = -2;
676
677 /* stacklevel changed? if yes, grab the stack for us! */
678 if (flags & TRANSFER_SAVE_CCTXT)
679 {
680 if (!prev->stack)
681 allocate_stack (prev, 0);
682 else if (prev->cursp != stacklevel
683 && prev->stack->usecnt > 1)
684 {
685 prev->gencnt = ++prev->stack->gencnt;
686 prev->stack->usecnt = 1;
687 }
688
689 /* has our stack been invalidated? */
690 if (next->stack && next->stack->gencnt != next->gencnt)
691 {
692 deallocate_stack (next);
693 allocate_stack (next, 1);
694 coro_create (&(next->stack->cctx),
695 continue_coro, (void *)next,
696 next->stack->sptr, labs (next->stack->ssize));
697 }
698
699 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
700 /* don't add any code here */
701 }
702
703 }
704 else if (next->tmps_ix == -2)
705 croak ("tried to transfer to running coroutine");
706 else
707 {
708 SAVE (prev, -1); /* first get rid of the old state */
709
710 if (flags & TRANSFER_SAVE_CCTXT)
711 {
712 if (!prev->stack)
713 allocate_stack (prev, 0);
714
715 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
716 {
717 setup_coro (next);
718
719 prev->stack->refcnt++;
720 prev->stack->usecnt++;
721 next->stack = prev->stack;
722 next->gencnt = prev->gencnt;
723 }
724 else
725 {
726 allocate_stack (next, 1);
727 coro_create (&(next->stack->cctx),
728 setup_coro, (void *)next,
729 next->stack->sptr, labs (next->stack->ssize));
730 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
731 /* don't add any code here */
732 }
733 }
734 else
735 setup_coro (next);
736 }
737 }
738
739 /*
740 * xnext is now either prev or next, depending on wether
741 * we switched the c stack or not. that's why i use a global
742 * variable, that should become thread-specific at one point.
743 */
744 xnext->cursp = stacklevel;
745}
746
747static struct coro *
748sv_to_coro (SV *arg, const char *funcname, const char *varname)
749{
750 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
751 {
752 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
753
754 if (!he)
755 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
756
757 arg = HeVAL(he);
758 }
759
760 /* must also be changed inside Coro::Cont::yield */
761 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
762 return (struct coro *) SvIV((SV*)SvRV(arg));
763
764 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
765 /*NORETURN*/
766}
767
768static void
769api_transfer(pTHX_ SV *prev, SV *next, int flags)
770{
771 transfer(aTHX_
772 sv_to_coro (prev, "Coro::transfer", "prev"),
773 sv_to_coro (next, "Coro::transfer", "next"),
774 flags);
775}
776 222
777/** Coro ********************************************************************/ 223/** Coro ********************************************************************/
778 224
779#define PRIO_MAX 3 225#define PRIO_MAX 3
780#define PRIO_HIGH 1 226#define PRIO_HIGH 1
… …
782#define PRIO_LOW -1 228#define PRIO_LOW -1
783#define PRIO_IDLE -3 229#define PRIO_IDLE -3
784#define PRIO_MIN -4 230#define PRIO_MIN -4
785 231
786/* for Coro.pm */ 232/* for Coro.pm */
787static GV *coro_current, *coro_idle; 233static SV *coro_current;
788static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 234static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
789static int coro_nready; 235static int coro_nready;
236static struct coro *coro_first;
790 237
791static void 238/** lowlevel stuff **********************************************************/
792coro_enq (SV *sv) 239
240static AV *
241coro_clone_padlist (pTHX_ CV *cv)
793{ 242{
794 if (SvROK (sv)) 243 AV *padlist = CvPADLIST (cv);
244 AV *newpadlist, *newpad;
245
246 newpadlist = newAV ();
247 AvREAL_off (newpadlist);
248#if PERL_VERSION_ATLEAST (5,9,0)
249 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
250#else
251 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
252#endif
253 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
254 --AvFILLp (padlist);
255
256 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
257 av_store (newpadlist, 1, (SV *)newpad);
258
259 return newpadlist;
260}
261
262static void
263free_padlist (pTHX_ AV *padlist)
264{
265 /* may be during global destruction */
266 if (SvREFCNT (padlist))
795 { 267 {
796 SV *hv = SvRV (sv); 268 I32 i = AvFILLp (padlist);
797 if (SvTYPE (hv) == SVt_PVHV) 269 while (i >= 0)
798 { 270 {
799 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 271 SV **svp = av_fetch (padlist, i--, FALSE);
800 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 272 if (svp)
273 {
274 SV *sv;
275 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
276 SvREFCNT_dec (sv);
801 277
802 prio = prio > PRIO_MAX ? PRIO_MAX 278 SvREFCNT_dec (*svp);
803 : prio < PRIO_MIN ? PRIO_MIN 279 }
804 : prio;
805
806 av_push (coro_ready [prio - PRIO_MIN], sv);
807 coro_nready++;
808
809 return;
810 } 280 }
281
282 SvREFCNT_dec ((SV*)padlist);
283 }
284}
285
286static int
287coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
288{
289 AV *padlist;
290 AV *av = (AV *)mg->mg_obj;
291
292 /* casting is fun. */
293 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294 free_padlist (aTHX_ padlist);
295
296 SvREFCNT_dec (av);
297
298 return 0;
299}
300
301#define PERL_MAGIC_coro PERL_MAGIC_ext
302
303static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
304
305#define CORO_MAGIC(cv) \
306 SvMAGIC (cv) \
307 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
308 ? SvMAGIC (cv) \
309 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
310 : 0
311
312static struct coro *
313SvSTATE_ (pTHX_ SV *coro)
314{
315 HV *stash;
316 MAGIC *mg;
317
318 if (SvROK (coro))
319 coro = SvRV (coro);
320
321 if (SvTYPE (coro) != SVt_PVHV)
322 croak ("Coro::State object required");
323
324 stash = SvSTASH (coro);
325 if (stash != coro_stash && stash != coro_state_stash)
326 {
327 /* very slow, but rare, check */
328 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
329 croak ("Coro::State object required");
330 }
331
332 mg = CORO_MAGIC (coro);
333 return (struct coro *)mg->mg_ptr;
334}
335
336#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
337
338/* the next two functions merely cache the padlists */
339static void
340get_padlist (pTHX_ CV *cv)
341{
342 MAGIC *mg = CORO_MAGIC (cv);
343 AV *av;
344
345 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
346 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
347 else
348 {
349#if CORO_PREFER_PERL_FUNCTIONS
350 /* this is probably cleaner, but also slower? */
351 CV *cp = Perl_cv_clone (cv);
352 CvPADLIST (cv) = CvPADLIST (cp);
353 CvPADLIST (cp) = 0;
354 SvREFCNT_dec (cp);
355#else
356 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
357#endif
811 } 358 }
359}
812 360
813 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 361static void
362put_padlist (pTHX_ CV *cv)
363{
364 MAGIC *mg = CORO_MAGIC (cv);
365 AV *av;
366
367 if (!mg)
368 {
369 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
370 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
371 mg->mg_virtual = &vtbl_coro;
372 mg->mg_obj = (SV *)newAV ();
373 }
374
375 av = (AV *)mg->mg_obj;
376
377 if (AvFILLp (av) >= AvMAX (av))
378 av_extend (av, AvMAX (av) + 1);
379
380 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
381}
382
383/** load & save, init *******************************************************/
384
385static void
386load_perl (pTHX_ Coro__State c)
387{
388#define VAR(name,type) PL_ ## name = c->name;
389# include "state.h"
390#undef VAR
391
392 GvSV (PL_defgv) = c->defsv;
393 GvAV (PL_defgv) = c->defav;
394 GvSV (PL_errgv) = c->errsv;
395 PL_defoutgv = c->deffh;
396 PL_rs = c->irssv;
397 GvSV (irsgv) = c->irssv_sv;
398
399 {
400 dSP;
401 CV *cv;
402
403 /* now do the ugly restore mess */
404 while ((cv = (CV *)POPs))
405 {
406 put_padlist (aTHX_ cv); /* mark this padlist as available */
407 CvDEPTH (cv) = PTR2IV (POPs);
408 CvPADLIST (cv) = (AV *)POPs;
409 }
410
411 PUTBACK;
412 }
413}
414
415static void
416save_perl (pTHX_ Coro__State c)
417{
418 {
419 dSP;
420 I32 cxix = cxstack_ix;
421 PERL_CONTEXT *ccstk = cxstack;
422 PERL_SI *top_si = PL_curstackinfo;
423
424 /*
425 * the worst thing you can imagine happens first - we have to save
426 * (and reinitialize) all cv's in the whole callchain :(
427 */
428
429 XPUSHs (Nullsv);
430 /* this loop was inspired by pp_caller */
431 for (;;)
432 {
433 while (cxix >= 0)
434 {
435 PERL_CONTEXT *cx = &ccstk[cxix--];
436
437 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
438 {
439 CV *cv = cx->blk_sub.cv;
440
441 if (CvDEPTH (cv))
442 {
443 EXTEND (SP, 3);
444 PUSHs ((SV *)CvPADLIST (cv));
445 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
446 PUSHs ((SV *)cv);
447
448 CvDEPTH (cv) = 0;
449 get_padlist (aTHX_ cv);
450 }
451 }
452 }
453
454 if (top_si->si_type == PERLSI_MAIN)
455 break;
456
457 top_si = top_si->si_prev;
458 ccstk = top_si->si_cxstack;
459 cxix = top_si->si_cxix;
460 }
461
462 PUTBACK;
463 }
464
465 c->defav = GvAV (PL_defgv);
466 c->defsv = DEFSV;
467 c->errsv = ERRSV;
468 c->deffh = PL_defoutgv;
469 c->irssv = PL_rs;
470 c->irssv_sv = GvSV (irsgv);
471
472#define VAR(name,type)c->name = PL_ ## name;
473# include "state.h"
474#undef VAR
475}
476
477/*
478 * allocate various perl stacks. This is an exact copy
479 * of perl.c:init_stacks, except that it uses less memory
480 * on the (sometimes correct) assumption that coroutines do
481 * not usually need a lot of stackspace.
482 */
483#if CORO_PREFER_PERL_FUNCTIONS
484# define coro_init_stacks init_stacks
485#else
486static void
487coro_init_stacks (pTHX)
488{
489 PL_curstackinfo = new_stackinfo(64, 6);
490 PL_curstackinfo->si_type = PERLSI_MAIN;
491 PL_curstack = PL_curstackinfo->si_stack;
492 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
493
494 PL_stack_base = AvARRAY(PL_curstack);
495 PL_stack_sp = PL_stack_base;
496 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
497
498 New(50,PL_tmps_stack,64,SV*);
499 PL_tmps_floor = -1;
500 PL_tmps_ix = -1;
501 PL_tmps_max = 64;
502
503 New(54,PL_markstack,16,I32);
504 PL_markstack_ptr = PL_markstack;
505 PL_markstack_max = PL_markstack + 16;
506
507#ifdef SET_MARK_OFFSET
508 SET_MARK_OFFSET;
509#endif
510
511 New(54,PL_scopestack,16,I32);
512 PL_scopestack_ix = 0;
513 PL_scopestack_max = 16;
514
515 New(54,PL_savestack,64,ANY);
516 PL_savestack_ix = 0;
517 PL_savestack_max = 64;
518
519#if !PERL_VERSION_ATLEAST (5,9,0)
520 New(54,PL_retstack,4,OP*);
521 PL_retstack_ix = 0;
522 PL_retstack_max = 4;
523#endif
524}
525#endif
526
527/*
528 * destroy the stacks, the callchain etc...
529 */
530static void
531coro_destroy_stacks (pTHX)
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 (pTHX_ 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
591coro_setup (pTHX_ struct coro *coro)
592{
593 /*
594 * emulate part of the perl startup here.
595 */
596 coro_init_stacks (aTHX);
597
598 PL_runops = RUNOPS_DEFAULT;
599 PL_curcop = &PL_compiling;
600 PL_in_eval = EVAL_NULL;
601 PL_comppad = 0;
602 PL_curpm = 0;
603 PL_localizing = 0;
604 PL_dirty = 0;
605 PL_restartop = 0;
606
607 GvSV (PL_defgv) = NEWSV (0, 0);
608 GvAV (PL_defgv) = coro->args; coro->args = 0;
609 GvSV (PL_errgv) = NEWSV (0, 0);
610 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
611 PL_rs = newSVsv (GvSV (irsgv));
612
613 {
614 IO *io = newIO ();
615 PL_defoutgv = newGVgen ("Coro");
616 GvIOp(PL_defoutgv) = io;
617 IoTYPE (io) = IoTYPE_WRONLY;
618 IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
619 IoFLAGS (io) |= IOf_FLUSH;
620 }
621
622 {
623 dSP;
624 LOGOP myop;
625
626 Zero (&myop, 1, LOGOP);
627 myop.op_next = Nullop;
628 myop.op_flags = OPf_WANT_VOID;
629
630 PUSHMARK (SP);
631 XPUSHs (av_shift (GvAV (PL_defgv)));
632 PUTBACK;
633 PL_op = (OP *)&myop;
634 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
635 SPAGAIN;
636 }
637
638 ENTER; /* necessary e.g. for dounwind */
639}
640
641static void
642coro_destroy (pTHX_ struct coro *coro)
643{
644 if (!IN_DESTRUCT)
645 {
646 /* restore all saved variables and stuff */
647 LEAVE_SCOPE (0);
648 assert (PL_tmps_floor == -1);
649
650 /* free all temporaries */
651 FREETMPS;
652 assert (PL_tmps_ix == -1);
653
654 /* unwind all extra stacks */
655 POPSTACK_TO (PL_mainstack);
656
657 /* unwind main stack */
658 dounwind (-1);
659 }
660
661 SvREFCNT_dec (GvSV (PL_defgv));
662 SvREFCNT_dec (GvAV (PL_defgv));
663 SvREFCNT_dec (GvSV (PL_errgv));
664 SvREFCNT_dec (PL_defoutgv);
665 SvREFCNT_dec (PL_rs);
666 SvREFCNT_dec (GvSV (irsgv));
667
668 SvREFCNT_dec (coro->defoutgv);
669 //SvREFCNT_dec (coro->throw);
670
671 coro_destroy_stacks (aTHX);
672}
673
674static void
675free_coro_mortal (pTHX)
676{
677 if (coro_mortal)
678 {
679 SvREFCNT_dec (coro_mortal);
680 coro_mortal = 0;
681 }
682}
683
684static int
685runops_trace (pTHX)
686{
687 COP *oldcop = 0;
688 int oldcxix = -2;
689 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
690 coro_cctx *cctx = coro->cctx;
691
692 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
693 {
694 PERL_ASYNC_CHECK ();
695
696 if (cctx->flags & CC_TRACE_ALL)
697 {
698 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
699 {
700 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
701 SV **bot, **top;
702 AV *av = newAV (); /* return values */
703 SV **cb;
704 dSP;
705
706 GV *gv = CvGV (cx->blk_sub.cv);
707 SV *fullname = sv_2mortal (newSV (0));
708 if (isGV (gv))
709 gv_efullname3 (fullname, gv, 0);
710
711 bot = PL_stack_base + cx->blk_oldsp + 1;
712 top = cx->blk_gimme == G_ARRAY ? SP + 1
713 : cx->blk_gimme == G_SCALAR ? bot + 1
714 : bot;
715
716 while (bot < top)
717 av_push (av, SvREFCNT_inc (*bot++));
718
719 PL_runops = RUNOPS_DEFAULT;
720 ENTER;
721 SAVETMPS;
722 EXTEND (SP, 3);
723 PUSHMARK (SP);
724 PUSHs (&PL_sv_no);
725 PUSHs (fullname);
726 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
727 PUTBACK;
728 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
729 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
730 SPAGAIN;
731 FREETMPS;
732 LEAVE;
733 PL_runops = runops_trace;
734 }
735
736 if (oldcop != PL_curcop)
737 {
738 oldcop = PL_curcop;
739
740 if (PL_curcop != &PL_compiling)
741 {
742 SV **cb;
743
744 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
745 {
746 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
747
748 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
749 {
750 runops_proc_t old_runops = PL_runops;
751 dSP;
752 GV *gv = CvGV (cx->blk_sub.cv);
753 SV *fullname = sv_2mortal (newSV (0));
754
755 if (isGV (gv))
756 gv_efullname3 (fullname, gv, 0);
757
758 PL_runops = RUNOPS_DEFAULT;
759 ENTER;
760 SAVETMPS;
761 EXTEND (SP, 3);
762 PUSHMARK (SP);
763 PUSHs (&PL_sv_yes);
764 PUSHs (fullname);
765 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
766 PUTBACK;
767 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
768 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
769 SPAGAIN;
770 FREETMPS;
771 LEAVE;
772 PL_runops = runops_trace;
773 }
774
775 oldcxix = cxstack_ix;
776 }
777
778 if (cctx->flags & CC_TRACE_LINE)
779 {
780 dSP;
781
782 PL_runops = RUNOPS_DEFAULT;
783 ENTER;
784 SAVETMPS;
785 EXTEND (SP, 3);
786 PL_runops = RUNOPS_DEFAULT;
787 PUSHMARK (SP);
788 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
789 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
790 PUTBACK;
791 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
792 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
793 SPAGAIN;
794 FREETMPS;
795 LEAVE;
796 PL_runops = runops_trace;
797 }
798 }
799 }
800 }
801 }
802
803 TAINT_NOT;
804 return 0;
805}
806
807/* inject a fake call to Coro::State::_cctx_init into the execution */
808/* _cctx_init should be careful, as it could be called at almost any time */
809/* during execution of a perl program */
810static void NOINLINE
811prepare_cctx (pTHX_ coro_cctx *cctx)
812{
813 dSP;
814 LOGOP myop;
815
816 PL_top_env = &PL_start_env;
817
818 if (cctx->flags & CC_TRACE)
819 PL_runops = runops_trace;
820
821 Zero (&myop, 1, LOGOP);
822 myop.op_next = PL_op;
823 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
824
825 PUSHMARK (SP);
826 EXTEND (SP, 2);
827 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
828 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
829 PUTBACK;
830 PL_op = (OP *)&myop;
831 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
832 SPAGAIN;
833}
834
835/*
836 * this is a _very_ stripped down perl interpreter ;)
837 */
838static void
839coro_run (void *arg)
840{
841 dTHX;
842
843 /* coro_run is the alternative tail of transfer(), so unlock here. */
844 UNLOCK;
845
846 /* we now skip the entersub that lead to transfer() */
847 PL_op = PL_op->op_next;
848
849 /* inject a fake subroutine call to cctx_init */
850 prepare_cctx (aTHX_ (coro_cctx *)arg);
851
852 /* somebody or something will hit me for both perl_run and PL_restartop */
853 PL_restartop = PL_op;
854 perl_run (PL_curinterp);
855
856 /*
857 * If perl-run returns we assume exit() was being called or the coro
858 * fell off the end, which seems to be the only valid (non-bug)
859 * reason for perl_run to return. We try to exit by jumping to the
860 * bootstrap-time "top" top_env, as we cannot restore the "main"
861 * coroutine as Coro has no such concept
862 */
863 PL_top_env = main_top_env;
864 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
865}
866
867static coro_cctx *
868cctx_new ()
869{
870 coro_cctx *cctx;
871 void *stack_start;
872 size_t stack_size;
873
874 ++cctx_count;
875
876 Newz (0, cctx, 1, coro_cctx);
877
878#if HAVE_MMAP
879
880 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
881 /* mmap supposedly does allocate-on-write for us */
882 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
883
884 if (cctx->sptr != (void *)-1)
885 {
886# if CORO_STACKGUARD
887 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
888# endif
889 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
890 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
891 cctx->flags |= CC_MAPPED;
892 }
893 else
894#endif
895 {
896 cctx->ssize = coro_stacksize * (long)sizeof (long);
897 New (0, cctx->sptr, coro_stacksize, long);
898
899 if (!cctx->sptr)
900 {
901 perror ("FATAL: unable to allocate stack for coroutine");
902 _exit (EXIT_FAILURE);
903 }
904
905 stack_start = cctx->sptr;
906 stack_size = cctx->ssize;
907 }
908
909 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
910 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
911
912 return cctx;
913}
914
915static void
916cctx_destroy (coro_cctx *cctx)
917{
918 if (!cctx)
919 return;
920
921 --cctx_count;
922
923#if CORO_USE_VALGRIND
924 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
925#endif
926
927#if HAVE_MMAP
928 if (cctx->flags & CC_MAPPED)
929 munmap (cctx->sptr, cctx->ssize);
930 else
931#endif
932 Safefree (cctx->sptr);
933
934 Safefree (cctx);
935}
936
937static coro_cctx *
938cctx_get (pTHX)
939{
940 while (cctx_first)
941 {
942 coro_cctx *cctx = cctx_first;
943 cctx_first = cctx->next;
944 --cctx_idle;
945
946 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
947 return cctx;
948
949 cctx_destroy (cctx);
950 }
951
952 return cctx_new ();
953}
954
955static void
956cctx_put (coro_cctx *cctx)
957{
958 /* free another cctx if overlimit */
959 if (cctx_idle >= MAX_IDLE_CCTX)
960 {
961 coro_cctx *first = cctx_first;
962 cctx_first = first->next;
963 --cctx_idle;
964
965 cctx_destroy (first);
966 }
967
968 ++cctx_idle;
969 cctx->next = cctx_first;
970 cctx_first = cctx;
971}
972
973/** coroutine switching *****************************************************/
974
975static void NOINLINE
976transfer_check (pTHX_ struct coro *prev, struct coro *next)
977{
978 if (prev != next)
979 {
980 if (!(prev->flags & (CF_RUNNING | CF_NEW)))
981 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
982
983 if (next->flags & CF_RUNNING)
984 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
985
986 if (next->flags & CF_DESTROYED)
987 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
988
989 if (PL_lex_state != LEX_NOTPARSING)
990 croak ("Coro::State::transfer called while parsing, but this is not supported");
991 }
992}
993
994/* always use the TRANSFER macro */
995static void NOINLINE
996transfer (pTHX_ struct coro *prev, struct coro *next)
997{
998 dSTACKLEVEL;
999
1000 /* sometimes transfer is only called to set idle_sp */
1001 if (!next)
1002 {
1003 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1004 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1005 }
1006 else if (prev != next)
1007 {
1008 coro_cctx *prev__cctx;
1009
1010 if (prev->flags & CF_NEW)
1011 {
1012 /* create a new empty context */
1013 Newz (0, prev->cctx, 1, coro_cctx);
1014 prev->flags &= ~CF_NEW;
1015 prev->flags |= CF_RUNNING;
1016 }
1017
1018 prev->flags &= ~CF_RUNNING;
1019 next->flags |= CF_RUNNING;
1020
1021 LOCK;
1022
1023 if (next->flags & CF_NEW)
1024 {
1025 /* need to start coroutine */
1026 next->flags &= ~CF_NEW;
1027 /* first get rid of the old state */
1028 save_perl (aTHX_ prev);
1029 /* setup coroutine call */
1030 coro_setup (aTHX_ next);
1031 }
1032 else
1033 {
1034 /* coroutine already started */
1035 save_perl (aTHX_ prev);
1036 load_perl (aTHX_ next);
1037 }
1038
1039 prev__cctx = prev->cctx;
1040
1041 /* possibly "free" the cctx */
1042 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
1043 {
1044 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1045 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1046
1047 prev->cctx = 0;
1048
1049 cctx_put (prev__cctx);
1050 }
1051
1052 ++next->usecount;
1053
1054 if (!next->cctx)
1055 next->cctx = cctx_get (aTHX);
1056
1057 if (prev__cctx != next->cctx)
1058 {
1059 prev__cctx->top_env = PL_top_env;
1060 PL_top_env = next->cctx->top_env;
1061 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1062 }
1063
1064 free_coro_mortal (aTHX);
1065 UNLOCK;
1066 }
1067}
1068
1069struct transfer_args
1070{
1071 struct coro *prev, *next;
1072};
1073
1074#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1075#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1076
1077/** high level stuff ********************************************************/
1078
1079static int
1080coro_state_destroy (pTHX_ struct coro *coro)
1081{
1082 if (coro->flags & CF_DESTROYED)
1083 return 0;
1084
1085 coro->flags |= CF_DESTROYED;
1086
1087 if (coro->flags & CF_READY)
1088 {
1089 /* reduce nready, as destroying a ready coro effectively unreadies it */
1090 /* alternative: look through all ready queues and remove the coro */
1091 LOCK;
1092 --coro_nready;
1093 UNLOCK;
1094 }
1095 else
1096 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1097
1098 if (coro->mainstack && coro->mainstack != main_mainstack)
1099 {
1100 struct coro temp;
1101
1102 if (coro->flags & CF_RUNNING)
1103 croak ("FATAL: tried to destroy currently running coroutine");
1104
1105 save_perl (aTHX_ &temp);
1106 load_perl (aTHX_ coro);
1107
1108 coro_destroy (aTHX_ coro);
1109
1110 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1111
1112 coro->mainstack = 0;
1113 }
1114
1115 cctx_destroy (coro->cctx);
1116 SvREFCNT_dec (coro->args);
1117
1118 if (coro->next) coro->next->prev = coro->prev;
1119 if (coro->prev) coro->prev->next = coro->next;
1120 if (coro == coro_first) coro_first = coro->next;
1121
1122 return 1;
1123}
1124
1125static int
1126coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1127{
1128 struct coro *coro = (struct coro *)mg->mg_ptr;
1129 mg->mg_ptr = 0;
1130
1131 coro->hv = 0;
1132
1133 if (--coro->refcnt < 0)
1134 {
1135 coro_state_destroy (aTHX_ coro);
1136 Safefree (coro);
1137 }
1138
1139 return 0;
1140}
1141
1142static int
1143coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1144{
1145 struct coro *coro = (struct coro *)mg->mg_ptr;
1146
1147 ++coro->refcnt;
1148
1149 return 0;
1150}
1151
1152static MGVTBL coro_state_vtbl = {
1153 0, 0, 0, 0,
1154 coro_state_free,
1155 0,
1156#ifdef MGf_DUP
1157 coro_state_dup,
1158#else
1159# define MGf_DUP 0
1160#endif
1161};
1162
1163static void
1164prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1165{
1166 ta->prev = SvSTATE (prev_sv);
1167 ta->next = SvSTATE (next_sv);
1168 TRANSFER_CHECK (*ta);
1169}
1170
1171static void
1172api_transfer (SV *prev_sv, SV *next_sv)
1173{
1174 dTHX;
1175 struct transfer_args ta;
1176
1177 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1178 TRANSFER (ta);
1179}
1180
1181/** Coro ********************************************************************/
1182
1183static void
1184coro_enq (pTHX_ SV *coro_sv)
1185{
1186 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
814} 1187}
815 1188
816static SV * 1189static SV *
817coro_deq (int min_prio) 1190coro_deq (pTHX_ int min_prio)
818{ 1191{
819 int prio = PRIO_MAX - PRIO_MIN; 1192 int prio = PRIO_MAX - PRIO_MIN;
820 1193
821 min_prio -= PRIO_MIN; 1194 min_prio -= PRIO_MIN;
822 if (min_prio < 0) 1195 if (min_prio < 0)
823 min_prio = 0; 1196 min_prio = 0;
824 1197
825 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1198 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826 if (av_len (coro_ready[prio]) >= 0) 1199 if (AvFILLp (coro_ready [prio]) >= 0)
827 {
828 coro_nready--;
829 return av_shift (coro_ready[prio]); 1200 return av_shift (coro_ready [prio]);
830 }
831 1201
832 return 0; 1202 return 0;
833} 1203}
834 1204
835static void 1205static int
836api_ready (SV *coro) 1206api_ready (SV *coro_sv)
837{ 1207{
1208 dTHX;
1209 struct coro *coro;
1210
1211 if (SvROK (coro_sv))
1212 coro_sv = SvRV (coro_sv);
1213
1214 coro = SvSTATE (coro_sv);
1215
1216 if (coro->flags & CF_READY)
1217 return 0;
1218
1219 coro->flags |= CF_READY;
1220
1221 LOCK;
838 coro_enq (SvREFCNT_inc (coro)); 1222 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
839} 1223 ++coro_nready;
1224 UNLOCK;
840 1225
1226 return 1;
1227}
1228
841static void 1229static int
842api_schedule (int cede) 1230api_is_ready (SV *coro_sv)
843{ 1231{
1232 dTHX;
1233 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1234}
1235
1236static void
1237prepare_schedule (pTHX_ struct transfer_args *ta)
1238{
844 SV *prev, *next; 1239 SV *prev_sv, *next_sv;
845 1240
1241 for (;;)
1242 {
1243 LOCK;
1244 next_sv = coro_deq (aTHX_ PRIO_MIN);
1245
1246 /* nothing to schedule: call the idle handler */
1247 if (!next_sv)
1248 {
1249 dSP;
1250 UNLOCK;
1251
1252 ENTER;
1253 SAVETMPS;
1254
1255 PUSHMARK (SP);
1256 PUTBACK;
1257 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1258
1259 FREETMPS;
1260 LEAVE;
1261 continue;
1262 }
1263
1264 ta->next = SvSTATE (next_sv);
1265
1266 /* cannot transfer to destroyed coros, skip and look for next */
1267 if (ta->next->flags & CF_DESTROYED)
1268 {
1269 UNLOCK;
1270 SvREFCNT_dec (next_sv);
1271 /* coro_nready is already taken care of by destroy */
1272 continue;
1273 }
1274
1275 --coro_nready;
1276 UNLOCK;
1277 break;
1278 }
1279
1280 /* free this only after the transfer */
846 prev = GvSV (coro_current); 1281 prev_sv = SvRV (coro_current);
1282 ta->prev = SvSTATE (prev_sv);
1283 TRANSFER_CHECK (*ta);
1284 assert (ta->next->flags & CF_READY);
1285 ta->next->flags &= ~CF_READY;
1286 SvRV_set (coro_current, next_sv);
847 1287
848 if (cede) 1288 LOCK;
849 coro_enq (SvREFCNT_inc (prev)); 1289 free_coro_mortal (aTHX);
850 1290 coro_mortal = prev_sv;
851 next = coro_deq (PRIO_MIN); 1291 UNLOCK;
852
853 if (!next)
854 next = SvREFCNT_inc (GvSV (coro_idle));
855
856 GvSV (coro_current) = SvREFCNT_inc (next);
857 transfer (aTHX_
858 sv_to_coro (prev, "Coro::schedule", "current coroutine"),
859 sv_to_coro (next, "Coro::schedule", "next coroutine"),
860 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
861 SvREFCNT_dec (next);
862 SvREFCNT_dec (prev);
863} 1292}
864 1293
1294static void
1295prepare_cede (pTHX_ struct transfer_args *ta)
1296{
1297 api_ready (coro_current);
1298 prepare_schedule (aTHX_ ta);
1299}
1300
1301static int
1302prepare_cede_notself (pTHX_ struct transfer_args *ta)
1303{
1304 if (coro_nready)
1305 {
1306 SV *prev = SvRV (coro_current);
1307 prepare_schedule (aTHX_ ta);
1308 api_ready (prev);
1309 return 1;
1310 }
1311 else
1312 return 0;
1313}
1314
1315static void
1316api_schedule (void)
1317{
1318 dTHX;
1319 struct transfer_args ta;
1320
1321 prepare_schedule (aTHX_ &ta);
1322 TRANSFER (ta);
1323}
1324
1325static int
1326api_cede (void)
1327{
1328 dTHX;
1329 struct transfer_args ta;
1330
1331 prepare_cede (aTHX_ &ta);
1332
1333 if (ta.prev != ta.next)
1334 {
1335 TRANSFER (ta);
1336 return 1;
1337 }
1338 else
1339 return 0;
1340}
1341
1342static int
1343api_cede_notself (void)
1344{
1345 dTHX;
1346 struct transfer_args ta;
1347
1348 if (prepare_cede_notself (aTHX_ &ta))
1349 {
1350 TRANSFER (ta);
1351 return 1;
1352 }
1353 else
1354 return 0;
1355}
1356
1357static void
1358api_trace (SV *coro_sv, int flags)
1359{
1360 dTHX;
1361 struct coro *coro = SvSTATE (coro_sv);
1362
1363 if (flags & CC_TRACE)
1364 {
1365 if (!coro->cctx)
1366 coro->cctx = cctx_new ();
1367 else if (!(coro->cctx->flags & CC_TRACE))
1368 croak ("cannot enable tracing on coroutine with custom stack");
1369
1370 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1371 }
1372 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1373 {
1374 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1375
1376 if (coro->flags & CF_RUNNING)
1377 PL_runops = RUNOPS_DEFAULT;
1378 else
1379 coro->runops = RUNOPS_DEFAULT;
1380 }
1381}
1382
865MODULE = Coro::State PACKAGE = Coro::State 1383MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
866 1384
867PROTOTYPES: ENABLE 1385PROTOTYPES: DISABLE
868 1386
869BOOT: 1387BOOT:
870{ /* {} necessary for stoopid perl-5.6.x */ 1388{
871 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1389#ifdef USE_ITHREADS
872 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1390 MUTEX_INIT (&coro_mutex);
1391#endif
1392 BOOT_PAGESIZE;
1393
1394 irsgv = gv_fetchpv ("/", 1, SVt_PV);
1395
873 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1396 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
874 1397
875 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1398 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
876 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1399 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
877 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1400 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
878 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1401 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
879
880 if (!padlist_cache)
881 padlist_cache = newHV ();
882 1402
883 main_mainstack = PL_mainstack; 1403 main_mainstack = PL_mainstack;
1404 main_top_env = PL_top_env;
1405
1406 while (main_top_env->je_prev)
1407 main_top_env = main_top_env->je_prev;
884 1408
885 coroapi.ver = CORO_API_VERSION; 1409 coroapi.ver = CORO_API_VERSION;
886 coroapi.transfer = api_transfer; 1410 coroapi.transfer = api_transfer;
887}
888 1411
889Coro::State 1412 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
890_newprocess(args) 1413}
891 SV * args 1414
892 PROTOTYPE: $ 1415SV *
1416new (char *klass, ...)
893 CODE: 1417 CODE:
894 Coro__State coro; 1418{
1419 struct coro *coro;
1420 HV *hv;
1421 int i;
895 1422
896 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
897 croak ("Coro::State::_newprocess expects an arrayref");
898
899 New (0, coro, 1, struct coro); 1423 Newz (0, coro, 1, struct coro);
1424 coro->args = newAV ();
1425 coro->flags = CF_NEW;
900 1426
901 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1427 if (coro_first) coro_first->prev = coro;
902 coro->mainstack = 0; /* actual work is done inside transfer */ 1428 coro->next = coro_first;
903 coro->stack = 0; 1429 coro_first = coro;
904 1430
905 RETVAL = coro; 1431 coro->hv = hv = newHV ();
1432 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1433 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1434
1435 for (i = 1; i < items; i++)
1436 av_push (coro->args, newSVsv (ST (i)));
1437}
906 OUTPUT: 1438 OUTPUT:
907 RETVAL 1439 RETVAL
908 1440
1441# these not obviously related functions are all rolled into the same xs
1442# function to increase chances that they all will call transfer with the same
1443# stack offset
909void 1444void
910transfer(prev, next, flags) 1445_set_stacklevel (...)
911 Coro::State_or_hashref prev 1446 ALIAS:
912 Coro::State_or_hashref next 1447 Coro::State::transfer = 1
913 int flags 1448 Coro::schedule = 2
914 PROTOTYPE: @ 1449 Coro::cede = 3
1450 Coro::cede_notself = 4
915 CODE: 1451 CODE:
916 PUTBACK; 1452{
917 transfer (aTHX_ prev, next, flags); 1453 struct transfer_args ta;
918 SPAGAIN; 1454
1455 switch (ix)
1456 {
1457 case 0:
1458 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1459 ta.next = 0;
1460 break;
1461
1462 case 1:
1463 if (items != 2)
1464 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1465
1466 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1467 break;
1468
1469 case 2:
1470 prepare_schedule (aTHX_ &ta);
1471 break;
1472
1473 case 3:
1474 prepare_cede (aTHX_ &ta);
1475 break;
1476
1477 case 4:
1478 if (!prepare_cede_notself (aTHX_ &ta))
1479 XSRETURN_EMPTY;
1480
1481 break;
1482 }
1483
1484 BARRIER;
1485 TRANSFER (ta);
1486
1487 if (GIMME_V != G_VOID && ta.next != ta.prev)
1488 XSRETURN_YES;
1489}
1490
1491bool
1492_destroy (SV *coro_sv)
1493 CODE:
1494 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1495 OUTPUT:
1496 RETVAL
919 1497
920void 1498void
921DESTROY(coro)
922 Coro::State coro
923 CODE:
924
925 if (coro->mainstack && coro->mainstack != main_mainstack)
926 {
927 struct coro temp;
928
929 PUTBACK;
930 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
931 LOAD(aTHX_ coro);
932 SPAGAIN;
933
934 destroy_stacks (aTHX);
935
936 LOAD((&temp)); /* this will get rid of defsv etc.. */
937 SPAGAIN;
938
939 coro->mainstack = 0;
940 }
941
942 deallocate_stack (coro);
943
944 Safefree (coro);
945
946void
947flush()
948 CODE:
949#ifdef MAY_FLUSH
950 flush_padlist_cache ();
951#endif
952
953void
954_exit(code) 1499_exit (code)
955 int code 1500 int code
956 PROTOTYPE: $ 1501 PROTOTYPE: $
957 CODE: 1502 CODE:
958#if defined(__GLIBC__) || _POSIX_C_SOURCE
959 _exit (code); 1503 _exit (code);
960#else
961 signal (SIGTERM, SIG_DFL);
962 raise (SIGTERM);
963 exit (code);
964#endif
965 1504
966MODULE = Coro::State PACKAGE = Coro::Cont 1505int
1506cctx_stacksize (int new_stacksize = 0)
1507 CODE:
1508 RETVAL = coro_stacksize;
1509 if (new_stacksize)
1510 coro_stacksize = new_stacksize;
1511 OUTPUT:
1512 RETVAL
967 1513
968# this is slightly dirty (should expose a c-level api) 1514int
1515cctx_count ()
1516 CODE:
1517 RETVAL = cctx_count;
1518 OUTPUT:
1519 RETVAL
1520
1521int
1522cctx_idle ()
1523 CODE:
1524 RETVAL = cctx_idle;
1525 OUTPUT:
1526 RETVAL
969 1527
970void 1528void
971yield(...) 1529list ()
972 PROTOTYPE: @ 1530 PPCODE:
1531{
1532 struct coro *coro;
1533 for (coro = coro_first; coro; coro = coro->next)
1534 if (coro->hv)
1535 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1536}
1537
1538void
1539call (Coro::State coro, SV *coderef)
1540 ALIAS:
1541 eval = 1
1542 CODE:
1543{
1544 if (coro->mainstack)
1545 {
1546 struct coro temp;
1547 Zero (&temp, 1, struct coro);
1548
1549 if (!(coro->flags & CF_RUNNING))
1550 {
1551 save_perl (aTHX_ &temp);
1552 load_perl (aTHX_ coro);
1553 }
1554
1555 {
1556 dSP;
1557 ENTER;
1558 SAVETMPS;
1559 PUSHMARK (SP);
1560 PUTBACK;
1561 if (ix)
1562 eval_sv (coderef, 0);
1563 else
1564 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1565 SPAGAIN;
1566 FREETMPS;
1567 LEAVE;
1568 PUTBACK;
1569 }
1570
1571 if (!(coro->flags & CF_RUNNING))
1572 {
1573 save_perl (aTHX_ coro);
1574 load_perl (aTHX_ &temp);
1575 }
1576 }
1577}
1578
1579SV *
1580is_ready (Coro::State coro)
1581 PROTOTYPE: $
1582 ALIAS:
1583 is_ready = CF_READY
1584 is_running = CF_RUNNING
1585 is_new = CF_NEW
1586 is_destroyed = CF_DESTROYED
1587 CODE:
1588 RETVAL = boolSV (coro->flags & ix);
1589 OUTPUT:
1590 RETVAL
1591
1592void
1593api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1594
1595SV *
1596has_stack (Coro::State coro)
1597 PROTOTYPE: $
1598 CODE:
1599 RETVAL = boolSV (!!coro->cctx);
1600 OUTPUT:
1601 RETVAL
1602
1603int
1604is_traced (Coro::State coro)
1605 PROTOTYPE: $
1606 CODE:
1607 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1608 OUTPUT:
1609 RETVAL
1610
1611IV
1612rss (Coro::State coro)
1613 PROTOTYPE: $
1614 ALIAS:
1615 usecount = 1
973 CODE: 1616 CODE:
974 static SV *returnstk; 1617 switch (ix)
975 SV *sv; 1618 {
976 AV *defav = GvAV (PL_defgv); 1619 case 0: RETVAL = coro_rss (aTHX_ coro); break;
977 struct coro *prev, *next; 1620 case 1: RETVAL = coro->usecount; break;
1621 }
1622 OUTPUT:
1623 RETVAL
978 1624
979 if (!returnstk)
980 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
981
982 /* set up @_ -- ugly */
983 av_clear (defav);
984 av_fill (defav, items - 1);
985 while (items--)
986 av_store (defav, items, SvREFCNT_inc (ST(items)));
987
988 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
989 sv = av_pop ((AV *)SvRV (returnstk));
990 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
991 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
992 SvREFCNT_dec (sv);
993
994 transfer(aTHX_ prev, next, 0);
995 1625
996MODULE = Coro::State PACKAGE = Coro 1626MODULE = Coro::State PACKAGE = Coro
997 1627
998# this is slightly dirty (should expose a c-level api)
999
1000BOOT: 1628BOOT:
1001{ 1629{
1002 int i; 1630 int i;
1631
1632 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1633 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1634 av_async_pool = get_av ("Coro::async_pool", TRUE);
1635
1636 coro_current = get_sv ("Coro::current", FALSE);
1637 SvREADONLY_on (coro_current);
1638
1003 HV *stash = gv_stashpv ("Coro", TRUE); 1639 coro_stash = gv_stashpv ("Coro", TRUE);
1004 1640
1005 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1641 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1006 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1642 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1007 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1643 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1008 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1644 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1009 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1645 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1010 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1646 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1011
1012 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1013 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1014 1647
1015 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1648 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1016 coro_ready[i] = newAV (); 1649 coro_ready[i] = newAV ();
1017 1650
1018 { 1651 {
1019 SV *sv = perl_get_sv("Coro::API", 1); 1652 SV *sv = perl_get_sv("Coro::API", 1);
1020 1653
1021 coroapi.schedule = api_schedule; 1654 coroapi.schedule = api_schedule;
1655 coroapi.cede = api_cede;
1656 coroapi.cede_notself = api_cede_notself;
1022 coroapi.ready = api_ready; 1657 coroapi.ready = api_ready;
1658 coroapi.is_ready = api_is_ready;
1023 coroapi.nready = &coro_nready; 1659 coroapi.nready = &coro_nready;
1024 coroapi.current = coro_current; 1660 coroapi.current = coro_current;
1025 1661
1026 GCoroAPI = &coroapi; 1662 GCoroAPI = &coroapi;
1027 sv_setiv(sv, (IV)&coroapi); 1663 sv_setiv (sv, (IV)&coroapi);
1028 SvREADONLY_on(sv); 1664 SvREADONLY_on (sv);
1029 } 1665 }
1030} 1666}
1031 1667
1032void 1668void
1033ready(self) 1669_set_current (SV *current)
1034 SV * self 1670 PROTOTYPE: $
1035 CODE: 1671 CODE:
1036 api_ready (self); 1672 SvREFCNT_dec (SvRV (coro_current));
1673 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1037 1674
1038int 1675int
1676prio (Coro::State coro, int newprio = 0)
1677 ALIAS:
1678 nice = 1
1679 CODE:
1680{
1681 RETVAL = coro->prio;
1682
1683 if (items > 1)
1684 {
1685 if (ix)
1686 newprio = coro->prio - newprio;
1687
1688 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1689 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1690
1691 coro->prio = newprio;
1692 }
1693}
1694 OUTPUT:
1695 RETVAL
1696
1697SV *
1698ready (SV *self)
1699 PROTOTYPE: $
1700 CODE:
1701 RETVAL = boolSV (api_ready (self));
1702 OUTPUT:
1703 RETVAL
1704
1705int
1039nready(...) 1706nready (...)
1040 PROTOTYPE: 1707 PROTOTYPE:
1041 CODE: 1708 CODE:
1042 RETVAL = coro_nready; 1709 RETVAL = coro_nready;
1043 OUTPUT: 1710 OUTPUT:
1044 RETVAL 1711 RETVAL
1045 1712
1713# for async_pool speedup
1046void 1714void
1047schedule(...) 1715_pool_1 (SV *cb)
1048 PROTOTYPE:
1049 ALIAS:
1050 cede = 1
1051 CODE: 1716 CODE:
1052 api_schedule (ix); 1717{
1718 struct coro *coro = SvSTATE (coro_current);
1719 HV *hv = (HV *)SvRV (coro_current);
1720 AV *defav = GvAV (PL_defgv);
1721 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1722 AV *invoke_av;
1723 int i, len;
1053 1724
1725 coro->defoutgv = SvREFCNT_inc (PL_defoutgv);
1726
1727 if (!invoke)
1728 croak ("\3terminate\2\n");
1729
1730 hv_store (hv, "desc", sizeof ("desc") - 1,
1731 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1732
1733 invoke_av = (AV *)SvRV (invoke);
1734 len = av_len (invoke_av);
1735
1736 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1737
1738 if (len > 0)
1739 {
1740 av_fill (defav, len - 1);
1741 for (i = 0; i < len; ++i)
1742 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1743 }
1744
1745
1746
1747 SvREFCNT_dec (invoke);
1748}
1749
1750void
1751_pool_2 (SV *cb)
1752 CODE:
1753{
1754 struct coro *coro = SvSTATE (coro_current);
1755
1756 sv_setsv (cb, &PL_sv_undef);
1757
1758 SvREFCNT_dec (PL_defoutgv); PL_defoutgv = coro->defoutgv;
1759
1760 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1761 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1762 croak ("\3terminate\2\n");
1763
1764 av_clear (GvAV (PL_defgv));
1765 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1766 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1767
1768 coro->prio = 0;
1769
1770 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1771 api_trace (coro_current, 0);
1772
1773 av_push (av_async_pool, newSVsv (coro_current));
1774}
1775
1776
1777MODULE = Coro::State PACKAGE = Coro::AIO
1778
1779SV *
1780_get_state ()
1781 CODE:
1782{
1783 struct io_state *data;
1784
1785 RETVAL = newSV (sizeof (struct io_state));
1786 data = (struct io_state *)SvPVX (RETVAL);
1787 SvCUR_set (RETVAL, sizeof (struct io_state));
1788 SvPOK_only (RETVAL);
1789
1790 data->errorno = errno;
1791 data->laststype = PL_laststype;
1792 data->laststatval = PL_laststatval;
1793 data->statcache = PL_statcache;
1794}
1795 OUTPUT:
1796 RETVAL
1797
1798void
1799_set_state (char *data_)
1800 PROTOTYPE: $
1801 CODE:
1802{
1803 struct io_state *data = (void *)data_;
1804
1805 errno = data->errorno;
1806 PL_laststype = data->laststype;
1807 PL_laststatval = data->laststatval;
1808 PL_statcache = data->statcache;
1809}
1810

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