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Comparing Coro/Coro/State.xs (file contents):
Revision 1.49 by pcg, Sun Nov 23 03:34:13 2003 UTC vs.
Revision 1.249 by root, Tue Sep 30 17:12:35 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "patchlevel.h" 11#include "patchlevel.h"
6 12
7#if PATCHLEVEL < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
55
56/* the maximum number of idle cctx that will be pooled */
57#define MAX_IDLE_CCTX 8
58
59#define PERL_VERSION_ATLEAST(a,b,c) \
60 (PERL_REVISION > (a) \
61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
8# ifndef PL_ppaddr 66# ifndef PL_ppaddr
9# define PL_ppaddr ppaddr 67# define PL_ppaddr ppaddr
10# endif 68# endif
11# ifndef call_sv 69# ifndef call_sv
12# define call_sv perl_call_sv 70# define call_sv perl_call_sv
… …
23# ifndef IS_PADCONST 81# ifndef IS_PADCONST
24# define IS_PADCONST(v) 0 82# define IS_PADCONST(v) 0
25# endif 83# endif
26#endif 84#endif
27 85
28#include "libcoro/coro.c" 86/* 5.8.8 */
29 87#ifndef GV_NOTQUAL
30#include <signal.h> 88# define GV_NOTQUAL 0
31
32#ifdef HAVE_MMAP
33# include <unistd.h>
34# include <sys/mman.h>
35# ifndef MAP_ANONYMOUS
36# ifdef MAP_ANON
37# define MAP_ANONYMOUS MAP_ANON
38# else
39# undef HAVE_MMAP
40# endif
41# endif 89#endif
90#ifndef newSV
91# define newSV(l) NEWSV(0,l)
42#endif 92#endif
43 93
44#define MAY_FLUSH /* increases codesize and is rarely used */ 94/* 5.11 */
95#ifndef CxHASARGS
96# define CxHASARGS(cx) (cx)->blk_sub.hasargs
97#endif
45 98
46#define SUB_INIT "Coro::State::initialize" 99/* 5.8.7 */
47#define UCORO_STATE "_coro_state" 100#ifndef SvRV_set
101# define SvRV_set(s,v) SvRV(s) = (v)
102#endif
48 103
49/* The next macro should declare a variable stacklevel that contains and approximation 104#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
50 * to the current C stack pointer. Its property is that it changes with each call 105# undef CORO_STACKGUARD
51 * and should be unique. */ 106#endif
107
108#ifndef CORO_STACKGUARD
109# define CORO_STACKGUARD 0
110#endif
111
112/* prefer perl internal functions over our own? */
113#ifndef CORO_PREFER_PERL_FUNCTIONS
114# define CORO_PREFER_PERL_FUNCTIONS 0
115#endif
116
117/* The next macros try to return the current stack pointer, in an as
118 * portable way as possible. */
119#define dSTACKLEVEL volatile char stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 120#define STACKLEVEL ((void *)&stacklevel)
53 121
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 122#define IN_DESTRUCT (PL_main_cv == Nullcv)
55 123
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 124#if __GNUC__ >= 3
125# define attribute(x) __attribute__(x)
126# define BARRIER __asm__ __volatile__ ("" : : : "memory")
127# define expect(expr,value) __builtin_expect ((expr),(value))
128#else
129# define attribute(x)
130# define BARRIER
131# define expect(expr,value) (expr)
132#endif
133
134#define expect_false(expr) expect ((expr) != 0, 0)
135#define expect_true(expr) expect ((expr) != 0, 1)
136
137#define NOINLINE attribute ((noinline))
57 138
58#include "CoroAPI.h" 139#include "CoroAPI.h"
59 140
141#ifdef USE_ITHREADS
142static perl_mutex coro_mutex;
143# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
144# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
145#else
146# define LOCK (void)0
147# define UNLOCK (void)0
148#endif
149
150/* helper storage struct for Coro::AIO */
151struct io_state
152{
153 AV *res;
154 int errorno;
155 I32 laststype;
156 int laststatval;
157 Stat_t statcache;
158};
159
160static double (*nvtime)(); /* so why doesn't it take void? */
161
162static size_t coro_stacksize = CORO_STACKSIZE;
60static struct CoroAPI coroapi; 163static struct CoroAPI coroapi;
164static AV *main_mainstack; /* used to differentiate between $main and others */
165static JMPENV *main_top_env;
166static HV *coro_state_stash, *coro_stash;
167static volatile SV *coro_mortal; /* will be freed after next transfer */
61 168
62/* this is actually not only the c stack but also c registers etc... */ 169static GV *irsgv; /* $/ */
170static GV *stdoutgv; /* *STDOUT */
171static SV *rv_diehook;
172static SV *rv_warnhook;
173static HV *hv_sig; /* %SIG */
174
175/* async_pool helper stuff */
176static SV *sv_pool_rss;
177static SV *sv_pool_size;
178static AV *av_async_pool;
179
180/* Coro::AnyEvent */
181static SV *sv_activity;
182
183static struct coro_cctx *cctx_first;
184static int cctx_count, cctx_idle;
185
186enum {
187 CC_MAPPED = 0x01,
188 CC_NOREUSE = 0x02, /* throw this away after tracing */
189 CC_TRACE = 0x04,
190 CC_TRACE_SUB = 0x08, /* trace sub calls */
191 CC_TRACE_LINE = 0x10, /* trace each statement */
192 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
193};
194
195/* this is a structure representing a c-level coroutine */
196typedef struct coro_cctx {
197 struct coro_cctx *next;
198
199 /* the stack */
200 void *sptr;
201 size_t ssize;
202
203 /* cpu state */
204 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
205 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
206 JMPENV *top_env;
207 coro_context cctx;
208
209#if CORO_USE_VALGRIND
210 int valgrind_id;
211#endif
212 unsigned char flags;
213} coro_cctx;
214
215enum {
216 CF_RUNNING = 0x0001, /* coroutine is running */
217 CF_READY = 0x0002, /* coroutine is ready */
218 CF_NEW = 0x0004, /* has never been switched to */
219 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
220};
221
222/* the structure where most of the perl state is stored, overlaid on the cxstack */
63typedef struct { 223typedef struct {
64 int refcnt; /* pointer reference counter */ 224 SV *defsv;
65 int usecnt; /* shared by how many coroutines */ 225 AV *defav;
66 int gencnt; /* generation counter */ 226 SV *errsv;
227 SV *irsgv;
228#define VAR(name,type) type name;
229# include "state.h"
230#undef VAR
231} perl_slots;
67 232
68 coro_context cctx; 233#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
69 234
70 void *sptr; 235/* this is a structure representing a perl-level coroutine */
71 long ssize; /* positive == mmap, otherwise malloc */
72} coro_stack;
73
74struct coro { 236struct coro {
75 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 237 /* the c coroutine allocated to this perl coroutine, if any */
76 JMPENV start_env; 238 coro_cctx *cctx;
77 239
78 /* the optional C context */ 240 /* process data */
79 coro_stack *stack;
80 void *cursp;
81 int gencnt;
82
83 /* optionally saved, might be zero */
84 AV *defav;
85 SV *defsv;
86 SV *errsv;
87
88 /* saved global state not related to stacks */
89 U8 dowarn;
90 I32 in_eval;
91
92 /* the stacks and related info (callchain etc..) */
93 PERL_SI *curstackinfo;
94 AV *curstack;
95 AV *mainstack; 241 AV *mainstack;
96 SV **stack_sp; 242 perl_slots *slot; /* basically the saved sp */
97 OP *op;
98 SV **curpad;
99 AV *comppad;
100 SV **stack_base;
101 SV **stack_max;
102 SV **tmps_stack;
103 I32 tmps_floor;
104 I32 tmps_ix;
105 I32 tmps_max;
106 I32 *markstack;
107 I32 *markstack_ptr;
108 I32 *markstack_max;
109 I32 *scopestack;
110 I32 scopestack_ix;
111 I32 scopestack_max;
112 ANY *savestack;
113 I32 savestack_ix;
114 I32 savestack_max;
115 OP **retstack;
116 I32 retstack_ix;
117 I32 retstack_max;
118 COP *curcop;
119 JMPENV *top_env;
120 243
121 /* data associated with this coroutine (initial args) */ 244 AV *args; /* data associated with this coroutine (initial args) */
122 AV *args; 245 int refcnt; /* coroutines are refcounted, yes */
246 int flags; /* CF_ flags */
247 HV *hv; /* the perl hash associated with this coro, if any */
248
249 /* statistics */
250 int usecount; /* number of transfers to this coro */
251
252 /* coro process data */
253 int prio;
254 SV *throw; /* exception to be thrown */
255
256 /* async_pool */
257 SV *saved_deffh;
258
259 /* linked list */
260 struct coro *next, *prev;
123}; 261};
124 262
125typedef struct coro *Coro__State; 263typedef struct coro *Coro__State;
126typedef struct coro *Coro__State_or_hashref; 264typedef struct coro *Coro__State_or_hashref;
127
128static AV *main_mainstack; /* used to differentiate between $main and others */
129static HV *coro_state_stash;
130static SV *ucoro_state_sv;
131static U32 ucoro_state_hash;
132static HV *padlist_cache;
133static SV *coro_mortal; /* will be freed after next transfer */
134
135/* mostly copied from op.c:cv_clone2 */
136STATIC AV *
137clone_padlist (AV *protopadlist)
138{
139 AV *av;
140 I32 ix;
141 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
142 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
143 SV **pname = AvARRAY (protopad_name);
144 SV **ppad = AvARRAY (protopad);
145 I32 fname = AvFILLp (protopad_name);
146 I32 fpad = AvFILLp (protopad);
147 AV *newpadlist, *newpad_name, *newpad;
148 SV **npad;
149
150 newpad_name = newAV ();
151 for (ix = fname; ix >= 0; ix--)
152 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154 newpad = newAV ();
155 av_fill (newpad, AvFILLp (protopad));
156 npad = AvARRAY (newpad);
157
158 newpadlist = newAV ();
159 AvREAL_off (newpadlist);
160 av_store (newpadlist, 0, (SV *) newpad_name);
161 av_store (newpadlist, 1, (SV *) newpad);
162
163 av = newAV (); /* will be @_ */
164 av_extend (av, 0);
165 av_store (newpad, 0, (SV *) av);
166 AvFLAGS (av) = AVf_REIFY;
167
168 for (ix = fpad; ix > 0; ix--)
169 {
170 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
171 if (namesv && namesv != &PL_sv_undef)
172 {
173 char *name = SvPVX (namesv); /* XXX */
174 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
175 { /* lexical from outside? */
176 npad[ix] = SvREFCNT_inc (ppad[ix]);
177 }
178 else
179 { /* our own lexical */
180 SV *sv;
181 if (*name == '&')
182 sv = SvREFCNT_inc (ppad[ix]);
183 else if (*name == '@')
184 sv = (SV *) newAV ();
185 else if (*name == '%')
186 sv = (SV *) newHV ();
187 else
188 sv = NEWSV (0, 0);
189#ifdef SvPADBUSY
190 if (!SvPADBUSY (sv))
191#endif
192 SvPADMY_on (sv);
193 npad[ix] = sv;
194 }
195 }
196 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
197 {
198 npad[ix] = SvREFCNT_inc (ppad[ix]);
199 }
200 else
201 {
202 SV *sv = NEWSV (0, 0);
203 SvPADTMP_on (sv);
204 npad[ix] = sv;
205 }
206 }
207
208#if 0 /* return -ENOTUNDERSTOOD */
209 /* Now that vars are all in place, clone nested closures. */
210
211 for (ix = fpad; ix > 0; ix--) {
212 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
213 if (namesv
214 && namesv != &PL_sv_undef
215 && !(SvFLAGS(namesv) & SVf_FAKE)
216 && *SvPVX(namesv) == '&'
217 && CvCLONE(ppad[ix]))
218 {
219 CV *kid = cv_clone((CV*)ppad[ix]);
220 SvREFCNT_dec(ppad[ix]);
221 CvCLONE_on(kid);
222 SvPADMY_on(kid);
223 npad[ix] = (SV*)kid;
224 }
225 }
226#endif
227
228 return newpadlist;
229}
230
231#ifdef MAY_FLUSH
232STATIC void
233free_padlist (AV *padlist)
234{
235 /* may be during global destruction */
236 if (SvREFCNT(padlist))
237 {
238 I32 i = AvFILLp(padlist);
239 while (i >= 0)
240 {
241 SV **svp = av_fetch(padlist, i--, FALSE);
242 SV *sv = svp ? *svp : Nullsv;
243 if (sv)
244 SvREFCNT_dec(sv);
245 }
246
247 SvREFCNT_dec((SV*)padlist);
248 }
249}
250#endif
251
252/* the next two functions merely cache the padlists */
253STATIC void
254get_padlist (CV *cv)
255{
256 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
257
258 if (he && AvFILLp ((AV *)*he) >= 0)
259 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
260 else
261 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
262}
263
264STATIC void
265put_padlist (CV *cv)
266{
267 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
268
269 if (SvTYPE (*he) != SVt_PVAV)
270 {
271 SvREFCNT_dec (*he);
272 *he = (SV *)newAV ();
273 }
274
275 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
276}
277
278#ifdef MAY_FLUSH
279STATIC void
280flush_padlist_cache ()
281{
282 HV *hv = padlist_cache;
283 padlist_cache = newHV ();
284
285 if (hv_iterinit (hv))
286 {
287 HE *he;
288 AV *padlist;
289
290 while (!!(he = hv_iternext (hv)))
291 {
292 AV *av = (AV *)HeVAL(he);
293
294 /* casting is fun. */
295 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
296 free_padlist (padlist);
297 }
298 }
299
300 SvREFCNT_dec (hv);
301}
302#endif
303
304#define SB do {
305#define SE } while (0)
306
307#define LOAD(state) load_state(aTHX_ (state));
308#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
309
310#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
311
312static void
313load_state(pTHX_ Coro__State c)
314{
315 PL_dowarn = c->dowarn;
316 PL_in_eval = c->in_eval;
317
318 PL_curstackinfo = c->curstackinfo;
319 PL_curstack = c->curstack;
320 PL_mainstack = c->mainstack;
321 PL_stack_sp = c->stack_sp;
322 PL_op = c->op;
323 PL_curpad = c->curpad;
324 PL_comppad = c->comppad;
325 PL_stack_base = c->stack_base;
326 PL_stack_max = c->stack_max;
327 PL_tmps_stack = c->tmps_stack;
328 PL_tmps_floor = c->tmps_floor;
329 PL_tmps_ix = c->tmps_ix;
330 PL_tmps_max = c->tmps_max;
331 PL_markstack = c->markstack;
332 PL_markstack_ptr = c->markstack_ptr;
333 PL_markstack_max = c->markstack_max;
334 PL_scopestack = c->scopestack;
335 PL_scopestack_ix = c->scopestack_ix;
336 PL_scopestack_max = c->scopestack_max;
337 PL_savestack = c->savestack;
338 PL_savestack_ix = c->savestack_ix;
339 PL_savestack_max = c->savestack_max;
340 PL_retstack = c->retstack;
341 PL_retstack_ix = c->retstack_ix;
342 PL_retstack_max = c->retstack_max;
343 PL_curcop = c->curcop;
344 PL_top_env = c->top_env;
345
346 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
347 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
348 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
349
350 {
351 dSP;
352 CV *cv;
353
354 /* now do the ugly restore mess */
355 while ((cv = (CV *)POPs))
356 {
357 AV *padlist = (AV *)POPs;
358
359 if (padlist)
360 {
361 put_padlist (cv); /* mark this padlist as available */
362 CvPADLIST(cv) = padlist;
363#ifdef USE_THREADS
364 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
365#endif
366 }
367
368 ++CvDEPTH(cv);
369 }
370
371 PUTBACK;
372 }
373}
374
375static void
376save_state(pTHX_ Coro__State c, int flags)
377{
378 {
379 dSP;
380 I32 cxix = cxstack_ix;
381 PERL_CONTEXT *ccstk = cxstack;
382 PERL_SI *top_si = PL_curstackinfo;
383
384 /*
385 * the worst thing you can imagine happens first - we have to save
386 * (and reinitialize) all cv's in the whole callchain :(
387 */
388
389 PUSHs (Nullsv);
390 /* this loop was inspired by pp_caller */
391 for (;;)
392 {
393 while (cxix >= 0)
394 {
395 PERL_CONTEXT *cx = &ccstk[cxix--];
396
397 if (CxTYPE(cx) == CXt_SUB)
398 {
399 CV *cv = cx->blk_sub.cv;
400 if (CvDEPTH(cv))
401 {
402#ifdef USE_THREADS
403 /*XPUSHs ((SV *)CvOWNER(cv));*/
404 /*CvOWNER(cv) = 0;*/
405 /*error must unlock this cv etc.. etc...*/
406#endif
407 EXTEND (SP, CvDEPTH(cv)*2);
408
409 while (--CvDEPTH(cv))
410 {
411 /* this tells the restore code to increment CvDEPTH */
412 PUSHs (Nullsv);
413 PUSHs ((SV *)cv);
414 }
415
416 PUSHs ((SV *)CvPADLIST(cv));
417 PUSHs ((SV *)cv);
418
419 get_padlist (cv); /* this is a monster */
420 }
421 }
422#ifdef CXt_FORMAT
423 else if (CxTYPE(cx) == CXt_FORMAT)
424 {
425 /* I never used formats, so how should I know how these are implemented? */
426 /* my bold guess is as a simple, plain sub... */
427 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
428 }
429#endif
430 }
431
432 if (top_si->si_type == PERLSI_MAIN)
433 break;
434
435 top_si = top_si->si_prev;
436 ccstk = top_si->si_cxstack;
437 cxix = top_si->si_cxix;
438 }
439
440 PUTBACK;
441 }
442
443 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
444 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
445 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
446
447 c->dowarn = PL_dowarn;
448 c->in_eval = PL_in_eval;
449
450 c->curstackinfo = PL_curstackinfo;
451 c->curstack = PL_curstack;
452 c->mainstack = PL_mainstack;
453 c->stack_sp = PL_stack_sp;
454 c->op = PL_op;
455 c->curpad = PL_curpad;
456 c->comppad = PL_comppad;
457 c->stack_base = PL_stack_base;
458 c->stack_max = PL_stack_max;
459 c->tmps_stack = PL_tmps_stack;
460 c->tmps_floor = PL_tmps_floor;
461 c->tmps_ix = PL_tmps_ix;
462 c->tmps_max = PL_tmps_max;
463 c->markstack = PL_markstack;
464 c->markstack_ptr = PL_markstack_ptr;
465 c->markstack_max = PL_markstack_max;
466 c->scopestack = PL_scopestack;
467 c->scopestack_ix = PL_scopestack_ix;
468 c->scopestack_max = PL_scopestack_max;
469 c->savestack = PL_savestack;
470 c->savestack_ix = PL_savestack_ix;
471 c->savestack_max = PL_savestack_max;
472 c->retstack = PL_retstack;
473 c->retstack_ix = PL_retstack_ix;
474 c->retstack_max = PL_retstack_max;
475 c->curcop = PL_curcop;
476 c->top_env = PL_top_env;
477}
478
479/*
480 * allocate various perl stacks. This is an exact copy
481 * of perl.c:init_stacks, except that it uses less memory
482 * on the assumption that coroutines do not usually need
483 * a lot of stackspace.
484 */
485STATIC void
486coro_init_stacks (pTHX)
487{
488 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
489 PL_curstackinfo->si_type = PERLSI_MAIN;
490 PL_curstack = PL_curstackinfo->si_stack;
491 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
492
493 PL_stack_base = AvARRAY(PL_curstack);
494 PL_stack_sp = PL_stack_base;
495 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
496
497 New(50,PL_tmps_stack,96,SV*);
498 PL_tmps_floor = -1;
499 PL_tmps_ix = -1;
500 PL_tmps_max = 96;
501
502 New(54,PL_markstack,16,I32);
503 PL_markstack_ptr = PL_markstack;
504 PL_markstack_max = PL_markstack + 16;
505
506#ifdef SET_MARK_OFFSET
507 SET_MARK_OFFSET;
508#endif
509
510 New(54,PL_scopestack,16,I32);
511 PL_scopestack_ix = 0;
512 PL_scopestack_max = 16;
513
514 New(54,PL_savestack,96,ANY);
515 PL_savestack_ix = 0;
516 PL_savestack_max = 96;
517
518 New(54,PL_retstack,8,OP*);
519 PL_retstack_ix = 0;
520 PL_retstack_max = 8;
521}
522
523/*
524 * destroy the stacks, the callchain etc...
525 */
526STATIC void
527destroy_stacks(pTHX)
528{
529 if (!IN_DESTRUCT)
530 {
531 /* is this ugly, I ask? */
532 while (PL_scopestack_ix)
533 LEAVE;
534
535 /* sure it is, but more important: is it correct?? :/ */
536 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
537 FREETMPS;
538 }
539
540 while (PL_curstackinfo->si_next)
541 PL_curstackinfo = PL_curstackinfo->si_next;
542
543 while (PL_curstackinfo)
544 {
545 PERL_SI *p = PL_curstackinfo->si_prev;
546
547 {
548 dSP;
549 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
550 PUTBACK; /* possibly superfluous */
551 }
552
553 if (!IN_DESTRUCT)
554 {
555 dounwind(-1);
556 SvREFCNT_dec(PL_curstackinfo->si_stack);
557 }
558
559 Safefree(PL_curstackinfo->si_cxstack);
560 Safefree(PL_curstackinfo);
561 PL_curstackinfo = p;
562 }
563
564 Safefree(PL_tmps_stack);
565 Safefree(PL_markstack);
566 Safefree(PL_scopestack);
567 Safefree(PL_savestack);
568 Safefree(PL_retstack);
569}
570
571static void
572allocate_stack (Coro__State ctx, int alloc)
573{
574 coro_stack *stack;
575
576 New (0, stack, 1, coro_stack);
577
578 stack->refcnt = 1;
579 stack->usecnt = 1;
580 stack->gencnt = ctx->gencnt = 0;
581 if (alloc)
582 {
583#if HAVE_MMAP
584 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
585 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
586 if (stack->sptr == (void *)-1)
587#endif
588 {
589 /*FIXME*//*D*//* reasonable stack size! */
590 stack->ssize = -4096 * sizeof (long);
591 New (0, stack->sptr, 4096, long);
592 }
593 }
594 else
595 stack->sptr = 0;
596
597 ctx->stack = stack;
598}
599
600static void
601deallocate_stack (Coro__State ctx)
602{
603 coro_stack *stack = ctx->stack;
604
605 ctx->stack = 0;
606
607 if (stack)
608 {
609 if (!--stack->refcnt)
610 {
611#ifdef HAVE_MMAP
612 if (stack->ssize > 0 && stack->sptr)
613 munmap (stack->sptr, stack->ssize);
614 else
615#endif
616 Safefree (stack->sptr);
617
618 Safefree (stack);
619 }
620 else if (ctx->gencnt == stack->gencnt)
621 --stack->usecnt;
622 }
623}
624
625static void
626setup_coro (void *arg)
627{
628 /*
629 * emulate part of the perl startup here.
630 */
631 dSP;
632 Coro__State ctx = (Coro__State)arg;
633 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
634
635 coro_init_stacks (aTHX);
636 /*PL_curcop = 0;*/
637 /*PL_in_eval = PL_in_eval;*/ /* inherit */
638 SvREFCNT_dec (GvAV (PL_defgv));
639 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
640
641 SPAGAIN;
642
643 if (ctx->stack)
644 {
645 ctx->cursp = 0;
646
647 PUSHMARK(SP);
648 PUTBACK;
649 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
650
651 if (SvTRUE (ERRSV))
652 croak (NULL);
653 else
654 croak ("FATAL: CCTXT coroutine returned!");
655 }
656 else
657 {
658 UNOP myop;
659
660 PL_op = (OP *)&myop;
661
662 Zero(&myop, 1, UNOP);
663 myop.op_next = Nullop;
664 myop.op_flags = OPf_WANT_VOID;
665
666 PUSHMARK(SP);
667 XPUSHs (sub_init);
668 /*
669 * the next line is slightly wrong, as PL_op->op_next
670 * is actually being executed so we skip the first op.
671 * that doesn't matter, though, since it is only
672 * pp_nextstate and we never return...
673 * ah yes, and I don't care anyways ;)
674 */
675 PUTBACK;
676 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
677 SPAGAIN;
678
679 ENTER; /* necessary e.g. for dounwind */
680 }
681}
682
683static void
684continue_coro (void *arg)
685{
686 /*
687 * this is a _very_ stripped down perl interpreter ;)
688 */
689 Coro__State ctx = (Coro__State)arg;
690 JMPENV coro_start_env;
691
692 PL_top_env = &ctx->start_env;
693
694 ctx->cursp = 0;
695 PL_op = PL_op->op_next;
696 CALLRUNOPS(aTHX);
697
698 abort ();
699}
700
701STATIC void
702transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
703{
704 dSTACKLEVEL;
705 static struct coro *xnext;
706
707 if (prev != next)
708 {
709 xnext = next;
710
711 if (next->mainstack)
712 {
713 SAVE (prev, flags);
714 LOAD (next);
715
716 /* mark this state as in-use */
717 next->mainstack = 0;
718 next->tmps_ix = -2;
719
720 /* stacklevel changed? if yes, grab the stack for us! */
721 if (flags & TRANSFER_SAVE_CCTXT)
722 {
723 if (!prev->stack)
724 allocate_stack (prev, 0);
725 else if (prev->cursp != stacklevel
726 && prev->stack->usecnt > 1)
727 {
728 prev->gencnt = ++prev->stack->gencnt;
729 prev->stack->usecnt = 1;
730 }
731
732 /* has our stack been invalidated? */
733 if (next->stack && next->stack->gencnt != next->gencnt)
734 {
735 deallocate_stack (next);
736 allocate_stack (next, 1);
737 coro_create (&(next->stack->cctx),
738 continue_coro, (void *)next,
739 next->stack->sptr, labs (next->stack->ssize));
740 }
741
742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743 /* don't add any code here */
744 }
745
746 }
747 else if (next->tmps_ix == -2)
748 croak ("tried to transfer to running coroutine");
749 else
750 {
751 SAVE (prev, -1); /* first get rid of the old state */
752
753 if (flags & TRANSFER_SAVE_CCTXT)
754 {
755 if (!prev->stack)
756 allocate_stack (prev, 0);
757
758 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
759 {
760 PL_top_env = &next->start_env;
761
762 setup_coro (next);
763
764 prev->stack->refcnt++;
765 prev->stack->usecnt++;
766 next->stack = prev->stack;
767 next->gencnt = prev->gencnt;
768 }
769 else
770 {
771 assert (!next->stack);
772 allocate_stack (next, 1);
773 coro_create (&(next->stack->cctx),
774 setup_coro, (void *)next,
775 next->stack->sptr, labs (next->stack->ssize));
776 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
777 /* don't add any code here */
778 }
779 }
780 else
781 setup_coro (next);
782 }
783
784 /*
785 * xnext is now either prev or next, depending on wether
786 * we switched the c stack or not. that's why I use a global
787 * variable, that should become thread-specific at one point.
788 */
789 xnext->cursp = stacklevel;
790 }
791
792 if (coro_mortal)
793 {
794 SvREFCNT_dec (coro_mortal);
795 coro_mortal = 0;
796 }
797}
798
799#define SV_CORO(sv,func) \
800 do { \
801 if (SvROK (sv)) \
802 sv = SvRV (sv); \
803 \
804 if (SvTYPE(sv) == SVt_PVHV) \
805 { \
806 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
807 \
808 if (!he) \
809 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
810 \
811 (sv) = SvRV (HeVAL(he)); \
812 } \
813 \
814 /* must also be changed inside Coro::Cont::yield */ \
815 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
816 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
817 \
818 } while(0)
819
820#define SvSTATE(sv) (struct coro *)SvIV (sv)
821
822static void
823api_transfer(pTHX_ SV *prev, SV *next, int flags)
824{
825 SV_CORO (prev, "Coro::transfer");
826 SV_CORO (next, "Coro::transfer");
827
828 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
829}
830 265
831/** Coro ********************************************************************/ 266/** Coro ********************************************************************/
832 267
833#define PRIO_MAX 3 268#define PRIO_MAX 3
834#define PRIO_HIGH 1 269#define PRIO_HIGH 1
… …
836#define PRIO_LOW -1 271#define PRIO_LOW -1
837#define PRIO_IDLE -3 272#define PRIO_IDLE -3
838#define PRIO_MIN -4 273#define PRIO_MIN -4
839 274
840/* for Coro.pm */ 275/* for Coro.pm */
841static GV *coro_current, *coro_idle; 276static SV *coro_current;
277static SV *coro_readyhook;
842static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 278static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
843static int coro_nready; 279static int coro_nready;
280static struct coro *coro_first;
281
282/** lowlevel stuff **********************************************************/
283
284static SV *
285coro_get_sv (pTHX_ const char *name, int create)
286{
287#if PERL_VERSION_ATLEAST (5,10,0)
288 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
289 get_sv (name, create);
290#endif
291 return get_sv (name, create);
292}
293
294static AV *
295coro_get_av (pTHX_ const char *name, int create)
296{
297#if PERL_VERSION_ATLEAST (5,10,0)
298 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
299 get_av (name, create);
300#endif
301 return get_av (name, create);
302}
303
304static HV *
305coro_get_hv (pTHX_ const char *name, int create)
306{
307#if PERL_VERSION_ATLEAST (5,10,0)
308 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
309 get_hv (name, create);
310#endif
311 return get_hv (name, create);
312}
313
314static AV *
315coro_clone_padlist (pTHX_ CV *cv)
316{
317 AV *padlist = CvPADLIST (cv);
318 AV *newpadlist, *newpad;
319
320 newpadlist = newAV ();
321 AvREAL_off (newpadlist);
322#if PERL_VERSION_ATLEAST (5,10,0)
323 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
324#else
325 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
326#endif
327 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
328 --AvFILLp (padlist);
329
330 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
331 av_store (newpadlist, 1, (SV *)newpad);
332
333 return newpadlist;
334}
844 335
845static void 336static void
846coro_enq (SV *sv) 337free_padlist (pTHX_ AV *padlist)
847{ 338{
848 if (SvTYPE (sv) == SVt_PVHV) 339 /* may be during global destruction */
849 { 340 if (SvREFCNT (padlist))
850 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
851 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
852
853 prio = prio > PRIO_MAX ? PRIO_MAX
854 : prio < PRIO_MIN ? PRIO_MIN
855 : prio;
856
857 av_push (coro_ready [prio - PRIO_MIN], sv);
858 coro_nready++;
859
860 return;
861 } 341 {
862 342 I32 i = AvFILLp (padlist);
863 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 343 while (i >= 0)
864}
865
866static SV *
867coro_deq (int min_prio)
868{
869 int prio = PRIO_MAX - PRIO_MIN;
870
871 min_prio -= PRIO_MIN;
872 if (min_prio < 0)
873 min_prio = 0;
874
875 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
876 if (av_len (coro_ready[prio]) >= 0)
877 { 344 {
878 coro_nready--; 345 SV **svp = av_fetch (padlist, i--, FALSE);
879 return av_shift (coro_ready[prio]); 346 if (svp)
347 {
348 SV *sv;
349 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
350 SvREFCNT_dec (sv);
351
352 SvREFCNT_dec (*svp);
353 }
880 } 354 }
355
356 SvREFCNT_dec ((SV*)padlist);
357 }
358}
359
360static int
361coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
362{
363 AV *padlist;
364 AV *av = (AV *)mg->mg_obj;
365
366 /* casting is fun. */
367 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
368 free_padlist (aTHX_ padlist);
369
370 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
881 371
882 return 0; 372 return 0;
883} 373}
884 374
885static void 375#define CORO_MAGIC_type_cv PERL_MAGIC_ext
886api_ready (SV *coro) 376#define CORO_MAGIC_type_state PERL_MAGIC_ext
377
378static MGVTBL coro_cv_vtbl = {
379 0, 0, 0, 0,
380 coro_cv_free
381};
382
383#define CORO_MAGIC(sv,type) \
384 SvMAGIC (sv) \
385 ? SvMAGIC (sv)->mg_type == type \
386 ? SvMAGIC (sv) \
387 : mg_find (sv, type) \
388 : 0
389
390#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
391#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
392
393static struct coro *
394SvSTATE_ (pTHX_ SV *coro)
887{ 395{
396 HV *stash;
397 MAGIC *mg;
398
888 if (SvROK (coro)) 399 if (SvROK (coro))
889 coro = SvRV (coro); 400 coro = SvRV (coro);
890 401
402 if (expect_false (SvTYPE (coro) != SVt_PVHV))
403 croak ("Coro::State object required");
404
405 stash = SvSTASH (coro);
406 if (expect_false (stash != coro_stash && stash != coro_state_stash))
407 {
408 /* very slow, but rare, check */
409 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
410 croak ("Coro::State object required");
411 }
412
413 mg = CORO_MAGIC_state (coro);
414 return (struct coro *)mg->mg_ptr;
415}
416
417#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
418
419/* the next two functions merely cache the padlists */
420static void
421get_padlist (pTHX_ CV *cv)
422{
423 MAGIC *mg = CORO_MAGIC_cv (cv);
424 AV *av;
425
426 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
427 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
428 else
429 {
430#if CORO_PREFER_PERL_FUNCTIONS
431 /* this is probably cleaner? but also slower! */
432 /* in practise, it seems to be less stable */
433 CV *cp = Perl_cv_clone (cv);
434 CvPADLIST (cv) = CvPADLIST (cp);
435 CvPADLIST (cp) = 0;
436 SvREFCNT_dec (cp);
437#else
438 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
439#endif
440 }
441}
442
443static void
444put_padlist (pTHX_ CV *cv)
445{
446 MAGIC *mg = CORO_MAGIC_cv (cv);
447 AV *av;
448
449 if (expect_false (!mg))
450 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
451
452 av = (AV *)mg->mg_obj;
453
454 if (expect_false (AvFILLp (av) >= AvMAX (av)))
455 av_extend (av, AvMAX (av) + 1);
456
457 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
458}
459
460/** load & save, init *******************************************************/
461
462static void
463load_perl (pTHX_ Coro__State c)
464{
465 perl_slots *slot = c->slot;
466 c->slot = 0;
467
468 PL_mainstack = c->mainstack;
469
470 GvSV (PL_defgv) = slot->defsv;
471 GvAV (PL_defgv) = slot->defav;
472 GvSV (PL_errgv) = slot->errsv;
473 GvSV (irsgv) = slot->irsgv;
474
475 #define VAR(name,type) PL_ ## name = slot->name;
476 # include "state.h"
477 #undef VAR
478
479 {
480 dSP;
481
482 CV *cv;
483
484 /* now do the ugly restore mess */
485 while (expect_true (cv = (CV *)POPs))
486 {
487 put_padlist (aTHX_ cv); /* mark this padlist as available */
488 CvDEPTH (cv) = PTR2IV (POPs);
489 CvPADLIST (cv) = (AV *)POPs;
490 }
491
492 PUTBACK;
493 }
494}
495
496static void
497save_perl (pTHX_ Coro__State c)
498{
499 {
500 dSP;
501 I32 cxix = cxstack_ix;
502 PERL_CONTEXT *ccstk = cxstack;
503 PERL_SI *top_si = PL_curstackinfo;
504
505 /*
506 * the worst thing you can imagine happens first - we have to save
507 * (and reinitialize) all cv's in the whole callchain :(
508 */
509
510 XPUSHs (Nullsv);
511 /* this loop was inspired by pp_caller */
512 for (;;)
513 {
514 while (expect_true (cxix >= 0))
515 {
516 PERL_CONTEXT *cx = &ccstk[cxix--];
517
518 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
519 {
520 CV *cv = cx->blk_sub.cv;
521
522 if (expect_true (CvDEPTH (cv)))
523 {
524 EXTEND (SP, 3);
525 PUSHs ((SV *)CvPADLIST (cv));
526 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
527 PUSHs ((SV *)cv);
528
529 CvDEPTH (cv) = 0;
530 get_padlist (aTHX_ cv);
531 }
532 }
533 }
534
535 if (expect_true (top_si->si_type == PERLSI_MAIN))
536 break;
537
538 top_si = top_si->si_prev;
539 ccstk = top_si->si_cxstack;
540 cxix = top_si->si_cxix;
541 }
542
543 PUTBACK;
544 }
545
546 /* allocate some space on the context stack for our purposes */
547 /* we manually unroll here, as usually 2 slots is enough */
548 if (SLOT_COUNT >= 1) CXINC;
549 if (SLOT_COUNT >= 2) CXINC;
550 if (SLOT_COUNT >= 3) CXINC;
551 {
552 int i;
553 for (i = 3; i < SLOT_COUNT; ++i)
554 CXINC;
555 }
556 cxstack_ix -= SLOT_COUNT; /* undo allocation */
557
558 c->mainstack = PL_mainstack;
559
560 {
561 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
562
563 slot->defav = GvAV (PL_defgv);
564 slot->defsv = DEFSV;
565 slot->errsv = ERRSV;
566 slot->irsgv = GvSV (irsgv);
567
568 #define VAR(name,type) slot->name = PL_ ## name;
569 # include "state.h"
570 #undef VAR
571 }
572}
573
574/*
575 * allocate various perl stacks. This is an exact copy
576 * of perl.c:init_stacks, except that it uses less memory
577 * on the (sometimes correct) assumption that coroutines do
578 * not usually need a lot of stackspace.
579 */
580#if CORO_PREFER_PERL_FUNCTIONS
581# define coro_init_stacks init_stacks
582#else
583static void
584coro_init_stacks (pTHX)
585{
586 PL_curstackinfo = new_stackinfo(32, 8);
587 PL_curstackinfo->si_type = PERLSI_MAIN;
588 PL_curstack = PL_curstackinfo->si_stack;
589 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
590
591 PL_stack_base = AvARRAY(PL_curstack);
592 PL_stack_sp = PL_stack_base;
593 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
594
595 New(50,PL_tmps_stack,32,SV*);
596 PL_tmps_floor = -1;
597 PL_tmps_ix = -1;
598 PL_tmps_max = 32;
599
600 New(54,PL_markstack,16,I32);
601 PL_markstack_ptr = PL_markstack;
602 PL_markstack_max = PL_markstack + 16;
603
604#ifdef SET_MARK_OFFSET
605 SET_MARK_OFFSET;
606#endif
607
608 New(54,PL_scopestack,8,I32);
609 PL_scopestack_ix = 0;
610 PL_scopestack_max = 8;
611
612 New(54,PL_savestack,24,ANY);
613 PL_savestack_ix = 0;
614 PL_savestack_max = 24;
615
616#if !PERL_VERSION_ATLEAST (5,10,0)
617 New(54,PL_retstack,4,OP*);
618 PL_retstack_ix = 0;
619 PL_retstack_max = 4;
620#endif
621}
622#endif
623
624/*
625 * destroy the stacks, the callchain etc...
626 */
627static void
628coro_destroy_stacks (pTHX)
629{
630 while (PL_curstackinfo->si_next)
631 PL_curstackinfo = PL_curstackinfo->si_next;
632
633 while (PL_curstackinfo)
634 {
635 PERL_SI *p = PL_curstackinfo->si_prev;
636
637 if (!IN_DESTRUCT)
638 SvREFCNT_dec (PL_curstackinfo->si_stack);
639
640 Safefree (PL_curstackinfo->si_cxstack);
641 Safefree (PL_curstackinfo);
642 PL_curstackinfo = p;
643 }
644
645 Safefree (PL_tmps_stack);
646 Safefree (PL_markstack);
647 Safefree (PL_scopestack);
648 Safefree (PL_savestack);
649#if !PERL_VERSION_ATLEAST (5,10,0)
650 Safefree (PL_retstack);
651#endif
652}
653
654static size_t
655coro_rss (pTHX_ struct coro *coro)
656{
657 size_t rss = sizeof (*coro);
658
659 if (coro->mainstack)
660 {
661 perl_slots tmp_slot;
662 perl_slots *slot;
663
664 if (coro->flags & CF_RUNNING)
665 {
666 slot = &tmp_slot;
667
668 #define VAR(name,type) slot->name = PL_ ## name;
669 # include "state.h"
670 #undef VAR
671 }
672 else
673 slot = coro->slot;
674
675 if (slot)
676 {
677 rss += sizeof (slot->curstackinfo);
678 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
679 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
680 rss += slot->tmps_max * sizeof (SV *);
681 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
682 rss += slot->scopestack_max * sizeof (I32);
683 rss += slot->savestack_max * sizeof (ANY);
684
685#if !PERL_VERSION_ATLEAST (5,10,0)
686 rss += slot->retstack_max * sizeof (OP *);
687#endif
688 }
689 }
690
691 return rss;
692}
693
694/** coroutine stack handling ************************************************/
695
696static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
697static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
698static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
699
700/* apparently < 5.8.8 */
701#ifndef MgPV_nolen_const
702#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
703 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
704 (const char*)(mg)->mg_ptr)
705#endif
706
707/*
708 * This overrides the default magic get method of %SIG elements.
709 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
710 * and instead of tryign to save and restore the hash elements, we just provide
711 * readback here.
712 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
713 * not expecting this to actually change the hook. This is a potential problem
714 * when a schedule happens then, but we ignore this.
715 */
716static int
717coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
718{
719 const char *s = MgPV_nolen_const (mg);
720
721 if (*s == '_')
722 {
723 SV **svp = 0;
724
725 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
726 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
727
728 if (svp)
729 {
730 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
731 return 0;
732 }
733 }
734
735 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
736}
737
738static int
739coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
740{
741 const char *s = MgPV_nolen_const (mg);
742
743 if (*s == '_')
744 {
745 SV **svp = 0;
746
747 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
748 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
749
750 if (svp)
751 {
752 SV *old = *svp;
753 *svp = 0;
754 SvREFCNT_dec (old);
755 return 0;
756 }
757 }
758
759 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
760}
761
762static int
763coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
764{
765 const char *s = MgPV_nolen_const (mg);
766
767 if (*s == '_')
768 {
769 SV **svp = 0;
770
771 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
772 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
773
774 if (svp)
775 {
776 SV *old = *svp;
777 *svp = newSVsv (sv);
778 SvREFCNT_dec (old);
779 return 0;
780 }
781 }
782
783 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
784}
785
786static void
787coro_setup (pTHX_ struct coro *coro)
788{
789 /*
790 * emulate part of the perl startup here.
791 */
792 coro_init_stacks (aTHX);
793
794 PL_runops = RUNOPS_DEFAULT;
795 PL_curcop = &PL_compiling;
796 PL_in_eval = EVAL_NULL;
797 PL_comppad = 0;
798 PL_curpm = 0;
799 PL_curpad = 0;
800 PL_localizing = 0;
801 PL_dirty = 0;
802 PL_restartop = 0;
803#if PERL_VERSION_ATLEAST (5,10,0)
804 PL_parser = 0;
805#endif
806
807 /* recreate the die/warn hooks */
808 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
809 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
810
811 GvSV (PL_defgv) = newSV (0);
812 GvAV (PL_defgv) = coro->args; coro->args = 0;
813 GvSV (PL_errgv) = newSV (0);
814 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
815 PL_rs = newSVsv (GvSV (irsgv));
816 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
817
818 {
819 dSP;
820 LOGOP myop;
821
822 Zero (&myop, 1, LOGOP);
823 myop.op_next = Nullop;
824 myop.op_flags = OPf_WANT_VOID;
825
826 PUSHMARK (SP);
827 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
828 PUTBACK;
829 PL_op = (OP *)&myop;
830 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
831 SPAGAIN;
832 }
833
834 /* this newly created coroutine might be run on an existing cctx which most
835 * likely was suspended in set_stacklevel, called from entersub.
836 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
837 * so we ENTER here for symmetry
838 */
839 ENTER;
840}
841
842static void
843coro_destroy (pTHX_ struct coro *coro)
844{
845 if (!IN_DESTRUCT)
846 {
847 /* restore all saved variables and stuff */
848 LEAVE_SCOPE (0);
849 assert (PL_tmps_floor == -1);
850
851 /* free all temporaries */
852 FREETMPS;
853 assert (PL_tmps_ix == -1);
854
855 /* unwind all extra stacks */
856 POPSTACK_TO (PL_mainstack);
857
858 /* unwind main stack */
859 dounwind (-1);
860 }
861
862 SvREFCNT_dec (GvSV (PL_defgv));
863 SvREFCNT_dec (GvAV (PL_defgv));
864 SvREFCNT_dec (GvSV (PL_errgv));
865 SvREFCNT_dec (PL_defoutgv);
866 SvREFCNT_dec (PL_rs);
867 SvREFCNT_dec (GvSV (irsgv));
868
869 SvREFCNT_dec (PL_diehook);
870 SvREFCNT_dec (PL_warnhook);
871
872 SvREFCNT_dec (coro->saved_deffh);
873 SvREFCNT_dec (coro->throw);
874
875 coro_destroy_stacks (aTHX);
876}
877
878static void
879free_coro_mortal (pTHX)
880{
881 if (expect_true (coro_mortal))
882 {
883 SvREFCNT_dec (coro_mortal);
884 coro_mortal = 0;
885 }
886}
887
888static int
889runops_trace (pTHX)
890{
891 COP *oldcop = 0;
892 int oldcxix = -2;
893 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
894 coro_cctx *cctx = coro->cctx;
895
896 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
897 {
898 PERL_ASYNC_CHECK ();
899
900 if (cctx->flags & CC_TRACE_ALL)
901 {
902 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
903 {
904 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
905 SV **bot, **top;
906 AV *av = newAV (); /* return values */
907 SV **cb;
908 dSP;
909
910 GV *gv = CvGV (cx->blk_sub.cv);
911 SV *fullname = sv_2mortal (newSV (0));
912 if (isGV (gv))
913 gv_efullname3 (fullname, gv, 0);
914
915 bot = PL_stack_base + cx->blk_oldsp + 1;
916 top = cx->blk_gimme == G_ARRAY ? SP + 1
917 : cx->blk_gimme == G_SCALAR ? bot + 1
918 : bot;
919
920 av_extend (av, top - bot);
921 while (bot < top)
922 av_push (av, SvREFCNT_inc_NN (*bot++));
923
924 PL_runops = RUNOPS_DEFAULT;
925 ENTER;
926 SAVETMPS;
927 EXTEND (SP, 3);
928 PUSHMARK (SP);
929 PUSHs (&PL_sv_no);
930 PUSHs (fullname);
931 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
932 PUTBACK;
933 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
934 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
935 SPAGAIN;
936 FREETMPS;
937 LEAVE;
938 PL_runops = runops_trace;
939 }
940
941 if (oldcop != PL_curcop)
942 {
943 oldcop = PL_curcop;
944
945 if (PL_curcop != &PL_compiling)
946 {
947 SV **cb;
948
949 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
950 {
951 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
952
953 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
954 {
955 runops_proc_t old_runops = PL_runops;
956 dSP;
957 GV *gv = CvGV (cx->blk_sub.cv);
958 SV *fullname = sv_2mortal (newSV (0));
959
960 if (isGV (gv))
961 gv_efullname3 (fullname, gv, 0);
962
963 PL_runops = RUNOPS_DEFAULT;
964 ENTER;
965 SAVETMPS;
966 EXTEND (SP, 3);
967 PUSHMARK (SP);
968 PUSHs (&PL_sv_yes);
969 PUSHs (fullname);
970 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
971 PUTBACK;
972 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
973 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
974 SPAGAIN;
975 FREETMPS;
976 LEAVE;
977 PL_runops = runops_trace;
978 }
979
980 oldcxix = cxstack_ix;
981 }
982
983 if (cctx->flags & CC_TRACE_LINE)
984 {
985 dSP;
986
987 PL_runops = RUNOPS_DEFAULT;
988 ENTER;
989 SAVETMPS;
990 EXTEND (SP, 3);
991 PL_runops = RUNOPS_DEFAULT;
992 PUSHMARK (SP);
993 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
994 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
995 PUTBACK;
996 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
997 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
998 SPAGAIN;
999 FREETMPS;
1000 LEAVE;
1001 PL_runops = runops_trace;
1002 }
1003 }
1004 }
1005 }
1006 }
1007
1008 TAINT_NOT;
1009 return 0;
1010}
1011
1012/* inject a fake call to Coro::State::_cctx_init into the execution */
1013/* _cctx_init should be careful, as it could be called at almost any time */
1014/* during execution of a perl program */
1015static void NOINLINE
1016cctx_prepare (pTHX_ coro_cctx *cctx)
1017{
1018 dSP;
1019 LOGOP myop;
1020
1021 PL_top_env = &PL_start_env;
1022
1023 if (cctx->flags & CC_TRACE)
1024 PL_runops = runops_trace;
1025
1026 Zero (&myop, 1, LOGOP);
1027 myop.op_next = PL_op;
1028 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1029
1030 PUSHMARK (SP);
1031 EXTEND (SP, 2);
1032 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1033 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1034 PUTBACK;
1035 PL_op = (OP *)&myop;
1036 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1037 SPAGAIN;
1038}
1039
1040/*
1041 * this is a _very_ stripped down perl interpreter ;)
1042 */
1043static void
1044cctx_run (void *arg)
1045{
1046 dTHX;
1047
1048 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1049 UNLOCK;
1050
1051 /* we now skip the entersub that lead to transfer() */
1052 PL_op = PL_op->op_next;
1053
1054 /* inject a fake subroutine call to cctx_init */
1055 cctx_prepare (aTHX_ (coro_cctx *)arg);
1056
1057 /* somebody or something will hit me for both perl_run and PL_restartop */
1058 PL_restartop = PL_op;
1059 perl_run (PL_curinterp);
1060
1061 /*
1062 * If perl-run returns we assume exit() was being called or the coro
1063 * fell off the end, which seems to be the only valid (non-bug)
1064 * reason for perl_run to return. We try to exit by jumping to the
1065 * bootstrap-time "top" top_env, as we cannot restore the "main"
1066 * coroutine as Coro has no such concept
1067 */
1068 PL_top_env = main_top_env;
1069 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1070}
1071
1072static coro_cctx *
1073cctx_new ()
1074{
1075 coro_cctx *cctx;
1076 void *stack_start;
1077 size_t stack_size;
1078
1079 ++cctx_count;
1080
1081 Newz (0, cctx, 1, coro_cctx);
1082
1083#if HAVE_MMAP
1084 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1085 /* mmap supposedly does allocate-on-write for us */
1086 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1087
1088 if (cctx->sptr != (void *)-1)
1089 {
1090# if CORO_STACKGUARD
1091 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1092# endif
1093 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1094 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1095 cctx->flags |= CC_MAPPED;
1096 }
1097 else
1098#endif
1099 {
1100 cctx->ssize = coro_stacksize * (long)sizeof (long);
1101 New (0, cctx->sptr, coro_stacksize, long);
1102
1103 if (!cctx->sptr)
1104 {
1105 perror ("FATAL: unable to allocate stack for coroutine");
1106 _exit (EXIT_FAILURE);
1107 }
1108
1109 stack_start = cctx->sptr;
1110 stack_size = cctx->ssize;
1111 }
1112
1113 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1114 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1115
1116 return cctx;
1117}
1118
1119static void
1120cctx_destroy (coro_cctx *cctx)
1121{
1122 if (!cctx)
1123 return;
1124
1125 --cctx_count;
1126
1127#if CORO_USE_VALGRIND
1128 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1129#endif
1130
1131#if HAVE_MMAP
1132 if (cctx->flags & CC_MAPPED)
1133 munmap (cctx->sptr, cctx->ssize);
1134 else
1135#endif
1136 Safefree (cctx->sptr);
1137
1138 Safefree (cctx);
1139}
1140
1141/* wether this cctx should be destructed */
1142#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1143
1144static coro_cctx *
1145cctx_get (pTHX)
1146{
1147 while (expect_true (cctx_first))
1148 {
1149 coro_cctx *cctx = cctx_first;
1150 cctx_first = cctx->next;
1151 --cctx_idle;
1152
1153 if (expect_true (!CCTX_EXPIRED (cctx)))
1154 return cctx;
1155
1156 cctx_destroy (cctx);
1157 }
1158
1159 return cctx_new ();
1160}
1161
1162static void
1163cctx_put (coro_cctx *cctx)
1164{
1165 /* free another cctx if overlimit */
1166 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1167 {
1168 coro_cctx *first = cctx_first;
1169 cctx_first = first->next;
1170 --cctx_idle;
1171
1172 cctx_destroy (first);
1173 }
1174
1175 ++cctx_idle;
1176 cctx->next = cctx_first;
1177 cctx_first = cctx;
1178}
1179
1180/** coroutine switching *****************************************************/
1181
1182static void
1183transfer_check (pTHX_ struct coro *prev, struct coro *next)
1184{
1185 if (expect_true (prev != next))
1186 {
1187 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1188 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1189
1190 if (expect_false (next->flags & CF_RUNNING))
1191 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1192
1193 if (expect_false (next->flags & CF_DESTROYED))
1194 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1195
1196#if !PERL_VERSION_ATLEAST (5,10,0)
1197 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1198 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1199#endif
1200 }
1201}
1202
1203/* always use the TRANSFER macro */
1204static void NOINLINE
1205transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1206{
1207 dSTACKLEVEL;
1208 static volatile int has_throw;
1209
1210 /* sometimes transfer is only called to set idle_sp */
1211 if (expect_false (!next))
1212 {
1213 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1214 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1215 }
1216 else if (expect_true (prev != next))
1217 {
1218 coro_cctx *prev__cctx;
1219
1220 if (expect_false (prev->flags & CF_NEW))
1221 {
1222 /* create a new empty context */
1223 Newz (0, prev->cctx, 1, coro_cctx);
1224 prev->flags &= ~CF_NEW;
1225 prev->flags |= CF_RUNNING;
1226 }
1227
1228 prev->flags &= ~CF_RUNNING;
1229 next->flags |= CF_RUNNING;
1230
1231 LOCK;
1232
1233 /* first get rid of the old state */
1234 save_perl (aTHX_ prev);
1235
1236 if (expect_false (next->flags & CF_NEW))
1237 {
1238 /* need to start coroutine */
1239 next->flags &= ~CF_NEW;
1240 /* setup coroutine call */
1241 coro_setup (aTHX_ next);
1242 }
1243 else
1244 load_perl (aTHX_ next);
1245
1246 prev__cctx = prev->cctx;
1247
1248 /* possibly "free" the cctx */
1249 if (expect_true (
1250 prev__cctx->idle_sp == STACKLEVEL
1251 && !(prev__cctx->flags & CC_TRACE)
1252 && !force_cctx
1253 ))
1254 {
1255 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1256 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1257
1258 prev->cctx = 0;
1259
1260 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1261 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1262 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1263 if (!next->cctx)
1264 next->cctx = cctx_get (aTHX);
1265
1266 cctx_put (prev__cctx);
1267 }
1268
1269 ++next->usecount;
1270
1271 if (expect_true (!next->cctx))
1272 next->cctx = cctx_get (aTHX);
1273
1274 has_throw = !!next->throw;
1275
1276 if (expect_false (prev__cctx != next->cctx))
1277 {
1278 prev__cctx->top_env = PL_top_env;
1279 PL_top_env = next->cctx->top_env;
1280 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1281 }
1282
1283 free_coro_mortal (aTHX);
1284 UNLOCK;
1285
1286 if (expect_false (has_throw))
1287 {
1288 struct coro *coro = SvSTATE (coro_current);
1289
1290 if (coro->throw)
1291 {
1292 SV *exception = coro->throw;
1293 coro->throw = 0;
1294 sv_setsv (ERRSV, exception);
1295 croak (0);
1296 }
1297 }
1298 }
1299}
1300
1301struct transfer_args
1302{
1303 struct coro *prev, *next;
1304};
1305
1306#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1307#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1308
1309/** high level stuff ********************************************************/
1310
1311static int
1312coro_state_destroy (pTHX_ struct coro *coro)
1313{
1314 if (coro->flags & CF_DESTROYED)
1315 return 0;
1316
1317 coro->flags |= CF_DESTROYED;
1318
1319 if (coro->flags & CF_READY)
1320 {
1321 /* reduce nready, as destroying a ready coro effectively unreadies it */
1322 /* alternative: look through all ready queues and remove the coro */
1323 LOCK;
1324 --coro_nready;
1325 UNLOCK;
1326 }
1327 else
1328 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1329
1330 if (coro->mainstack && coro->mainstack != main_mainstack)
1331 {
1332 struct coro temp;
1333
1334 if (coro->flags & CF_RUNNING)
1335 croak ("FATAL: tried to destroy currently running coroutine");
1336
1337 save_perl (aTHX_ &temp);
1338 load_perl (aTHX_ coro);
1339
1340 coro_destroy (aTHX_ coro);
1341
1342 load_perl (aTHX_ &temp);
1343
1344 coro->slot = 0;
1345 }
1346
1347 cctx_destroy (coro->cctx);
1348 SvREFCNT_dec (coro->args);
1349
1350 if (coro->next) coro->next->prev = coro->prev;
1351 if (coro->prev) coro->prev->next = coro->next;
1352 if (coro == coro_first) coro_first = coro->next;
1353
1354 return 1;
1355}
1356
1357static int
1358coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1359{
1360 struct coro *coro = (struct coro *)mg->mg_ptr;
1361 mg->mg_ptr = 0;
1362
1363 coro->hv = 0;
1364
1365 if (--coro->refcnt < 0)
1366 {
1367 coro_state_destroy (aTHX_ coro);
1368 Safefree (coro);
1369 }
1370
1371 return 0;
1372}
1373
1374static int
1375coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1376{
1377 struct coro *coro = (struct coro *)mg->mg_ptr;
1378
1379 ++coro->refcnt;
1380
1381 return 0;
1382}
1383
1384static MGVTBL coro_state_vtbl = {
1385 0, 0, 0, 0,
1386 coro_state_free,
1387 0,
1388#ifdef MGf_DUP
1389 coro_state_dup,
1390#else
1391# define MGf_DUP 0
1392#endif
1393};
1394
1395static void
1396prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1397{
1398 ta->prev = SvSTATE (prev_sv);
1399 ta->next = SvSTATE (next_sv);
1400 TRANSFER_CHECK (*ta);
1401}
1402
1403static void
1404api_transfer (SV *prev_sv, SV *next_sv)
1405{
1406 dTHX;
1407 struct transfer_args ta;
1408
1409 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1410 TRANSFER (ta, 1);
1411}
1412
1413/** Coro ********************************************************************/
1414
1415static void
1416coro_enq (pTHX_ SV *coro_sv)
1417{
1418 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1419}
1420
1421static SV *
1422coro_deq (pTHX)
1423{
1424 int prio;
1425
1426 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1427 if (AvFILLp (coro_ready [prio]) >= 0)
1428 return av_shift (coro_ready [prio]);
1429
1430 return 0;
1431}
1432
1433static int
1434api_ready (SV *coro_sv)
1435{
1436 dTHX;
1437 struct coro *coro;
1438 SV *sv_hook;
1439 void (*xs_hook)(void);
1440
1441 if (SvROK (coro_sv))
1442 coro_sv = SvRV (coro_sv);
1443
1444 coro = SvSTATE (coro_sv);
1445
1446 if (coro->flags & CF_READY)
1447 return 0;
1448
1449 coro->flags |= CF_READY;
1450
1451 LOCK;
1452
1453 sv_hook = coro_nready ? 0 : coro_readyhook;
1454 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1455
891 coro_enq (SvREFCNT_inc (coro)); 1456 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1457 ++coro_nready;
1458
1459 UNLOCK;
1460
1461 if (sv_hook)
1462 {
1463 dSP;
1464
1465 ENTER;
1466 SAVETMPS;
1467
1468 PUSHMARK (SP);
1469 PUTBACK;
1470 call_sv (sv_hook, G_DISCARD);
1471 SPAGAIN;
1472
1473 FREETMPS;
1474 LEAVE;
1475 }
1476
1477 if (xs_hook)
1478 xs_hook ();
1479
1480 return 1;
1481}
1482
1483static int
1484api_is_ready (SV *coro_sv)
1485{
1486 dTHX;
1487 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1488}
1489
1490static void
1491prepare_schedule (pTHX_ struct transfer_args *ta)
1492{
1493 SV *prev_sv, *next_sv;
1494
1495 for (;;)
1496 {
1497 LOCK;
1498 next_sv = coro_deq (aTHX);
1499
1500 /* nothing to schedule: call the idle handler */
1501 if (expect_false (!next_sv))
1502 {
1503 dSP;
1504 UNLOCK;
1505
1506 ENTER;
1507 SAVETMPS;
1508
1509 PUSHMARK (SP);
1510 PUTBACK;
1511 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1512 SPAGAIN;
1513
1514 FREETMPS;
1515 LEAVE;
1516 continue;
1517 }
1518
1519 ta->next = SvSTATE (next_sv);
1520
1521 /* cannot transfer to destroyed coros, skip and look for next */
1522 if (expect_false (ta->next->flags & CF_DESTROYED))
1523 {
1524 UNLOCK;
1525 SvREFCNT_dec (next_sv);
1526 /* coro_nready is already taken care of by destroy */
1527 continue;
1528 }
1529
1530 --coro_nready;
1531 UNLOCK;
1532 break;
1533 }
1534
1535 /* free this only after the transfer */
1536 prev_sv = SvRV (coro_current);
1537 ta->prev = SvSTATE (prev_sv);
1538 TRANSFER_CHECK (*ta);
1539 assert (ta->next->flags & CF_READY);
1540 ta->next->flags &= ~CF_READY;
1541 SvRV_set (coro_current, next_sv);
1542
1543 LOCK;
1544 free_coro_mortal (aTHX);
1545 coro_mortal = prev_sv;
1546 UNLOCK;
1547}
1548
1549static void
1550prepare_cede (pTHX_ struct transfer_args *ta)
1551{
1552 api_ready (coro_current);
1553 prepare_schedule (aTHX_ ta);
1554}
1555
1556static int
1557prepare_cede_notself (pTHX_ struct transfer_args *ta)
1558{
1559 if (coro_nready)
1560 {
1561 SV *prev = SvRV (coro_current);
1562 prepare_schedule (aTHX_ ta);
1563 api_ready (prev);
1564 return 1;
1565 }
1566 else
1567 return 0;
892} 1568}
893 1569
894static void 1570static void
895api_schedule (void) 1571api_schedule (void)
896{ 1572{
897 SV *prev, *next; 1573 dTHX;
1574 struct transfer_args ta;
898 1575
899 prev = SvRV (GvSV (coro_current)); 1576 prepare_schedule (aTHX_ &ta);
900 next = coro_deq (PRIO_MIN); 1577 TRANSFER (ta, 1);
1578}
901 1579
902 if (!next) 1580static int
903 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1581api_cede (void)
1582{
1583 dTHX;
1584 struct transfer_args ta;
904 1585
905 /* free this only after the transfer */ 1586 prepare_cede (aTHX_ &ta);
906 coro_mortal = prev;
907 SV_CORO (prev, "Coro::schedule");
908 1587
909 SvRV (GvSV (coro_current)) = next; 1588 if (expect_true (ta.prev != ta.next))
1589 {
1590 TRANSFER (ta, 1);
1591 return 1;
1592 }
1593 else
1594 return 0;
1595}
910 1596
911 SV_CORO (next, "Coro::schedule"); 1597static int
1598api_cede_notself (void)
1599{
1600 dTHX;
1601 struct transfer_args ta;
912 1602
913 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1603 if (prepare_cede_notself (aTHX_ &ta))
914 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1604 {
1605 TRANSFER (ta, 1);
1606 return 1;
1607 }
1608 else
1609 return 0;
915} 1610}
916 1611
917static void 1612static void
918api_cede (void) 1613api_trace (SV *coro_sv, int flags)
919{ 1614{
920 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1615 dTHX;
1616 struct coro *coro = SvSTATE (coro_sv);
921 1617
1618 if (flags & CC_TRACE)
1619 {
1620 if (!coro->cctx)
1621 coro->cctx = cctx_new ();
1622 else if (!(coro->cctx->flags & CC_TRACE))
1623 croak ("cannot enable tracing on coroutine with custom stack");
1624
1625 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1626 }
1627 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1628 {
1629 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1630
1631 if (coro->flags & CF_RUNNING)
1632 PL_runops = RUNOPS_DEFAULT;
1633 else
1634 coro->slot->runops = RUNOPS_DEFAULT;
1635 }
1636}
1637
1638static int
1639coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1640{
1641 AV *padlist;
1642 AV *av = (AV *)mg->mg_obj;
1643
1644 abort ();
1645
1646 return 0;
1647}
1648
1649static MGVTBL coro_gensub_vtbl = {
1650 0, 0, 0, 0,
1651 coro_gensub_free
1652};
1653
1654/*****************************************************************************/
1655/* PerlIO::cede */
1656
1657typedef struct
1658{
1659 PerlIOBuf base;
1660 NV next, every;
1661} PerlIOCede;
1662
1663static IV
1664PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1665{
1666 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1667
1668 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1669 self->next = nvtime () + self->every;
1670
1671 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1672}
1673
1674static SV *
1675PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1676{
1677 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1678
1679 return newSVnv (self->every);
1680}
1681
1682static IV
1683PerlIOCede_flush (pTHX_ PerlIO *f)
1684{
1685 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1686 double now = nvtime ();
1687
1688 if (now >= self->next)
1689 {
922 api_schedule (); 1690 api_cede ();
923} 1691 self->next = now + self->every;
1692 }
924 1693
1694 return PerlIOBuf_flush (aTHX_ f);
1695}
1696
1697static PerlIO_funcs PerlIO_cede =
1698{
1699 sizeof(PerlIO_funcs),
1700 "cede",
1701 sizeof(PerlIOCede),
1702 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1703 PerlIOCede_pushed,
1704 PerlIOBuf_popped,
1705 PerlIOBuf_open,
1706 PerlIOBase_binmode,
1707 PerlIOCede_getarg,
1708 PerlIOBase_fileno,
1709 PerlIOBuf_dup,
1710 PerlIOBuf_read,
1711 PerlIOBuf_unread,
1712 PerlIOBuf_write,
1713 PerlIOBuf_seek,
1714 PerlIOBuf_tell,
1715 PerlIOBuf_close,
1716 PerlIOCede_flush,
1717 PerlIOBuf_fill,
1718 PerlIOBase_eof,
1719 PerlIOBase_error,
1720 PerlIOBase_clearerr,
1721 PerlIOBase_setlinebuf,
1722 PerlIOBuf_get_base,
1723 PerlIOBuf_bufsiz,
1724 PerlIOBuf_get_ptr,
1725 PerlIOBuf_get_cnt,
1726 PerlIOBuf_set_ptrcnt,
1727};
1728
1729
925MODULE = Coro::State PACKAGE = Coro::State 1730MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
926 1731
927PROTOTYPES: ENABLE 1732PROTOTYPES: DISABLE
928 1733
929BOOT: 1734BOOT:
930{ /* {} necessary for stoopid perl-5.6.x */ 1735{
931 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1736#ifdef USE_ITHREADS
932 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1737 MUTEX_INIT (&coro_mutex);
1738#endif
1739 BOOT_PAGESIZE;
1740
1741 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1742 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1743
1744 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1745 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1746 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1747
1748 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1749 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1750 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1751
933 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1752 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934 1753
935 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1754 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
936 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1755 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
937 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1756 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
938 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1757 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
939
940 if (!padlist_cache)
941 padlist_cache = newHV ();
942 1758
943 main_mainstack = PL_mainstack; 1759 main_mainstack = PL_mainstack;
1760 main_top_env = PL_top_env;
944 1761
1762 while (main_top_env->je_prev)
1763 main_top_env = main_top_env->je_prev;
1764
945 coroapi.ver = CORO_API_VERSION; 1765 coroapi.ver = CORO_API_VERSION;
1766 coroapi.rev = CORO_API_REVISION;
946 coroapi.transfer = api_transfer; 1767 coroapi.transfer = api_transfer;
947}
948 1768
949Coro::State 1769 {
950_newprocess(args) 1770 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
951 SV * args 1771
952 PROTOTYPE: $ 1772 if (!svp) croak ("Time::HiRes is required");
1773 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1774
1775 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1776 }
1777
1778 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1779}
1780
1781SV *
1782new (char *klass, ...)
953 CODE: 1783 CODE:
954 Coro__State coro; 1784{
1785 struct coro *coro;
1786 MAGIC *mg;
1787 HV *hv;
1788 int i;
955 1789
956 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
957 croak ("Coro::State::_newprocess expects an arrayref");
958
959 Newz (0, coro, 1, struct coro); 1790 Newz (0, coro, 1, struct coro);
1791 coro->args = newAV ();
1792 coro->flags = CF_NEW;
960 1793
961 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1794 if (coro_first) coro_first->prev = coro;
962 coro->mainstack = 0; /* actual work is done inside transfer */ 1795 coro->next = coro_first;
963 coro->stack = 0; 1796 coro_first = coro;
964 1797
965 /* same as JMPENV_BOOTSTRAP */ 1798 coro->hv = hv = newHV ();
966 /* we might be able to recycle start_env, but safe is safe */ 1799 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
967 //Zero(&coro->start_env, 1, JMPENV); 1800 mg->mg_flags |= MGf_DUP;
968 coro->start_env.je_ret = -1; 1801 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
969 coro->start_env.je_mustcatch = TRUE;
970 1802
971 RETVAL = coro; 1803 av_extend (coro->args, items - 1);
1804 for (i = 1; i < items; i++)
1805 av_push (coro->args, newSVsv (ST (i)));
1806}
972 OUTPUT: 1807 OUTPUT:
973 RETVAL 1808 RETVAL
974 1809
1810# these not obviously related functions are all rolled into the same xs
1811# function to increase chances that they all will call transfer with the same
1812# stack offset
975void 1813void
976transfer(prev, next, flags) 1814_set_stacklevel (...)
977 SV *prev 1815 ALIAS:
978 SV *next 1816 Coro::State::transfer = 1
979 int flags 1817 Coro::schedule = 2
980 PROTOTYPE: @ 1818 Coro::cede = 3
1819 Coro::cede_notself = 4
981 CODE: 1820 CODE:
1821{
1822 struct transfer_args ta;
1823
982 PUTBACK; 1824 PUTBACK;
983 SV_CORO (next, "Coro::transfer"); 1825 switch (ix)
984 SV_CORO (prev, "Coro::transfer"); 1826 {
985 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1827 case 0:
1828 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1829 ta.next = 0;
1830 break;
1831
1832 case 1:
1833 if (items != 2)
1834 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1835
1836 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1837 break;
1838
1839 case 2:
1840 prepare_schedule (aTHX_ &ta);
1841 break;
1842
1843 case 3:
1844 prepare_cede (aTHX_ &ta);
1845 break;
1846
1847 case 4:
1848 if (!prepare_cede_notself (aTHX_ &ta))
1849 XSRETURN_EMPTY;
1850
1851 break;
1852 }
986 SPAGAIN; 1853 SPAGAIN;
987 1854
1855 BARRIER;
1856 PUTBACK;
1857 TRANSFER (ta, 0);
1858 SPAGAIN; /* might be the sp of a different coroutine now */
1859 /* be extra careful not to ever do anything after TRANSFER */
1860}
1861
1862bool
1863_destroy (SV *coro_sv)
1864 CODE:
1865 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1866 OUTPUT:
1867 RETVAL
1868
988void 1869void
989DESTROY(coro) 1870_exit (int code)
990 Coro::State coro 1871 PROTOTYPE: $
991 CODE: 1872 CODE:
1873 _exit (code);
992 1874
993 if (coro->mainstack && coro->mainstack != main_mainstack) 1875int
1876cctx_stacksize (int new_stacksize = 0)
1877 CODE:
1878 RETVAL = coro_stacksize;
1879 if (new_stacksize)
1880 coro_stacksize = new_stacksize;
1881 OUTPUT:
1882 RETVAL
1883
1884int
1885cctx_count ()
1886 CODE:
1887 RETVAL = cctx_count;
1888 OUTPUT:
1889 RETVAL
1890
1891int
1892cctx_idle ()
1893 CODE:
1894 RETVAL = cctx_idle;
1895 OUTPUT:
1896 RETVAL
1897
1898void
1899list ()
1900 PPCODE:
1901{
1902 struct coro *coro;
1903 for (coro = coro_first; coro; coro = coro->next)
1904 if (coro->hv)
1905 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1906}
1907
1908void
1909call (Coro::State coro, SV *coderef)
1910 ALIAS:
1911 eval = 1
1912 CODE:
1913{
1914 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
994 { 1915 {
995 struct coro temp; 1916 struct coro temp;
996 1917
1918 if (!(coro->flags & CF_RUNNING))
1919 {
1920 PUTBACK;
1921 save_perl (aTHX_ &temp);
1922 load_perl (aTHX_ coro);
1923 }
1924
1925 {
1926 dSP;
1927 ENTER;
1928 SAVETMPS;
997 PUTBACK; 1929 PUTBACK;
998 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1930 PUSHSTACK;
999 LOAD(aTHX_ coro); 1931 PUSHMARK (SP);
1932
1933 if (ix)
1934 eval_sv (coderef, 0);
1935 else
1936 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1937
1938 POPSTACK;
1000 SPAGAIN; 1939 SPAGAIN;
1940 FREETMPS;
1941 LEAVE;
1942 PUTBACK;
1943 }
1001 1944
1002 destroy_stacks (aTHX); 1945 if (!(coro->flags & CF_RUNNING))
1003 1946 {
1004 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1947 save_perl (aTHX_ coro);
1948 load_perl (aTHX_ &temp);
1005 SPAGAIN; 1949 SPAGAIN;
1006 1950 }
1007 coro->mainstack = 0;
1008 } 1951 }
1952}
1009 1953
1010 deallocate_stack (coro); 1954SV *
1011 SvREFCNT_dec (coro->args); 1955is_ready (Coro::State coro)
1012 Safefree (coro); 1956 PROTOTYPE: $
1957 ALIAS:
1958 is_ready = CF_READY
1959 is_running = CF_RUNNING
1960 is_new = CF_NEW
1961 is_destroyed = CF_DESTROYED
1962 CODE:
1963 RETVAL = boolSV (coro->flags & ix);
1964 OUTPUT:
1965 RETVAL
1013 1966
1014void 1967void
1015flush() 1968api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1016 CODE:
1017#ifdef MAY_FLUSH
1018 flush_padlist_cache ();
1019#endif
1020 1969
1021void 1970SV *
1022_exit(code) 1971has_cctx (Coro::State coro)
1023 int code
1024 PROTOTYPE: $ 1972 PROTOTYPE: $
1025 CODE: 1973 CODE:
1026#if defined(__GLIBC__) || _POSIX_C_SOURCE 1974 RETVAL = boolSV (!!coro->cctx);
1027 _exit (code); 1975 OUTPUT:
1028#else 1976 RETVAL
1029 signal (SIGTERM, SIG_DFL);
1030 raise (SIGTERM);
1031 exit (code);
1032#endif
1033 1977
1034MODULE = Coro::State PACKAGE = Coro::Cont 1978int
1979is_traced (Coro::State coro)
1980 PROTOTYPE: $
1981 CODE:
1982 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1983 OUTPUT:
1984 RETVAL
1035 1985
1036# this is slightly dirty (should expose a c-level api) 1986IV
1987rss (Coro::State coro)
1988 PROTOTYPE: $
1989 ALIAS:
1990 usecount = 1
1991 CODE:
1992 switch (ix)
1993 {
1994 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1995 case 1: RETVAL = coro->usecount; break;
1996 }
1997 OUTPUT:
1998 RETVAL
1037 1999
1038void 2000void
1039yield(...) 2001force_cctx ()
2002 CODE:
2003 struct coro *coro = SvSTATE (coro_current);
2004 coro->cctx->idle_sp = 0;
2005
2006void
2007throw (Coro::State self, SV *throw = &PL_sv_undef)
1040 PROTOTYPE: @ 2008 PROTOTYPE: $;$
1041 CODE: 2009 CODE:
1042 static SV *returnstk;
1043 SV *sv;
1044 AV *defav = GvAV (PL_defgv);
1045 struct coro *prev, *next;
1046
1047 if (!returnstk)
1048 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1049
1050 /* set up @_ -- ugly */
1051 av_clear (defav);
1052 av_fill (defav, items - 1);
1053 while (items--)
1054 av_store (defav, items, SvREFCNT_inc (ST(items)));
1055
1056 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1057 sv = av_pop ((AV *)SvRV (returnstk));
1058 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1059 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1060 SvREFCNT_dec (sv); 2010 SvREFCNT_dec (self->throw);
2011 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1061 2012
1062 transfer(aTHX_ prev, next, 0); 2013void
2014swap_defsv (Coro::State self)
2015 PROTOTYPE: $
2016 ALIAS:
2017 swap_defav = 1
2018 CODE:
2019 if (!self->slot)
2020 croak ("cannot swap state with coroutine that has no saved state");
2021 else
2022 {
2023 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2024 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2025
2026 SV *tmp = *src; *src = *dst; *dst = tmp;
2027 }
1063 2028
1064MODULE = Coro::State PACKAGE = Coro 2029MODULE = Coro::State PACKAGE = Coro
1065 2030
1066# this is slightly dirty (should expose a c-level api)
1067
1068BOOT: 2031BOOT:
1069{ 2032{
1070 int i; 2033 int i;
2034
2035 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2036 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2037 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2038
2039 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2040 SvREADONLY_on (coro_current);
2041
1071 HV *stash = gv_stashpv ("Coro", TRUE); 2042 coro_stash = gv_stashpv ("Coro", TRUE);
1072 2043
1073 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2044 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1074 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2045 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1075 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2046 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1076 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2047 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1077 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2048 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1078 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2049 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1079
1080 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1081 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1082 2050
1083 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2051 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1084 coro_ready[i] = newAV (); 2052 coro_ready[i] = newAV ();
1085 2053
1086 { 2054 {
1087 SV *sv = perl_get_sv("Coro::API", 1); 2055 SV *sv = perl_get_sv ("Coro::API", TRUE);
2056 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1088 2057
1089 coroapi.schedule = api_schedule; 2058 coroapi.schedule = api_schedule;
1090 coroapi.cede = api_cede; 2059 coroapi.cede = api_cede;
2060 coroapi.cede_notself = api_cede_notself;
1091 coroapi.ready = api_ready; 2061 coroapi.ready = api_ready;
2062 coroapi.is_ready = api_is_ready;
1092 coroapi.nready = &coro_nready; 2063 coroapi.nready = &coro_nready;
1093 coroapi.current = coro_current; 2064 coroapi.current = coro_current;
1094 2065
1095 GCoroAPI = &coroapi; 2066 GCoroAPI = &coroapi;
1096 sv_setiv(sv, (IV)&coroapi); 2067 sv_setiv (sv, (IV)&coroapi);
1097 SvREADONLY_on(sv); 2068 SvREADONLY_on (sv);
1098 } 2069 }
1099} 2070}
1100 2071
1101void 2072void
1102ready(self) 2073_set_current (SV *current)
1103 SV * self
1104 PROTOTYPE: $ 2074 PROTOTYPE: $
1105 CODE: 2075 CODE:
1106 api_ready (self); 2076 SvREFCNT_dec (SvRV (coro_current));
2077 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2078
2079void
2080_set_readyhook (SV *hook)
2081 PROTOTYPE: $
2082 CODE:
2083 LOCK;
2084 SvREFCNT_dec (coro_readyhook);
2085 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2086 UNLOCK;
1107 2087
1108int 2088int
2089prio (Coro::State coro, int newprio = 0)
2090 ALIAS:
2091 nice = 1
2092 CODE:
2093{
2094 RETVAL = coro->prio;
2095
2096 if (items > 1)
2097 {
2098 if (ix)
2099 newprio = coro->prio - newprio;
2100
2101 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2102 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2103
2104 coro->prio = newprio;
2105 }
2106}
2107 OUTPUT:
2108 RETVAL
2109
2110SV *
2111ready (SV *self)
2112 PROTOTYPE: $
2113 CODE:
2114 RETVAL = boolSV (api_ready (self));
2115 OUTPUT:
2116 RETVAL
2117
2118int
1109nready(...) 2119nready (...)
1110 PROTOTYPE: 2120 PROTOTYPE:
1111 CODE: 2121 CODE:
1112 RETVAL = coro_nready; 2122 RETVAL = coro_nready;
1113 OUTPUT: 2123 OUTPUT:
1114 RETVAL 2124 RETVAL
1115 2125
2126# for async_pool speedup
1116void 2127void
1117schedule(...) 2128_pool_1 (SV *cb)
1118 PROTOTYPE:
1119 CODE: 2129 CODE:
1120 api_schedule (); 2130{
2131 struct coro *coro = SvSTATE (coro_current);
2132 HV *hv = (HV *)SvRV (coro_current);
2133 AV *defav = GvAV (PL_defgv);
2134 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2135 AV *invoke_av;
2136 int i, len;
2137
2138 if (!invoke)
2139 {
2140 SV *old = PL_diehook;
2141 PL_diehook = 0;
2142 SvREFCNT_dec (old);
2143 croak ("\3async_pool terminate\2\n");
2144 }
2145
2146 SvREFCNT_dec (coro->saved_deffh);
2147 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2148
2149 hv_store (hv, "desc", sizeof ("desc") - 1,
2150 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2151
2152 invoke_av = (AV *)SvRV (invoke);
2153 len = av_len (invoke_av);
2154
2155 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2156
2157 if (len > 0)
2158 {
2159 av_fill (defav, len - 1);
2160 for (i = 0; i < len; ++i)
2161 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2162 }
2163
2164 SvREFCNT_dec (invoke);
2165}
1121 2166
1122void 2167void
1123cede(...) 2168_pool_2 (SV *cb)
1124 PROTOTYPE:
1125 CODE: 2169 CODE:
2170{
2171 struct coro *coro = SvSTATE (coro_current);
2172
2173 sv_setsv (cb, &PL_sv_undef);
2174
2175 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2176 coro->saved_deffh = 0;
2177
2178 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2179 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2180 {
2181 SV *old = PL_diehook;
2182 PL_diehook = 0;
2183 SvREFCNT_dec (old);
2184 croak ("\3async_pool terminate\2\n");
2185 }
2186
2187 av_clear (GvAV (PL_defgv));
2188 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2189 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2190
2191 coro->prio = 0;
2192
2193 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2194 api_trace (coro_current, 0);
2195
2196 av_push (av_async_pool, newSVsv (coro_current));
2197}
2198
2199#if 0
2200
2201void
2202_generator_call (...)
2203 PROTOTYPE: @
2204 PPCODE:
2205 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2206 xxxx
2207 abort ();
2208
2209SV *
2210gensub (SV *sub, ...)
2211 PROTOTYPE: &;@
2212 CODE:
2213{
2214 struct coro *coro;
2215 MAGIC *mg;
2216 CV *xcv;
2217 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2218 int i;
2219
2220 CvGV (ncv) = CvGV (cv);
2221 CvFILE (ncv) = CvFILE (cv);
2222
2223 Newz (0, coro, 1, struct coro);
2224 coro->args = newAV ();
2225 coro->flags = CF_NEW;
2226
2227 av_extend (coro->args, items - 1);
2228 for (i = 1; i < items; i++)
2229 av_push (coro->args, newSVsv (ST (i)));
2230
2231 CvISXSUB_on (ncv);
2232 CvXSUBANY (ncv).any_ptr = (void *)coro;
2233
2234 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2235
2236 CvXSUB (ncv) = CvXSUB (xcv);
2237 CvANON_on (ncv);
2238
2239 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2240 RETVAL = newRV_noinc ((SV *)ncv);
2241}
2242 OUTPUT:
2243 RETVAL
2244
2245#endif
2246
2247
2248MODULE = Coro::State PACKAGE = Coro::AIO
2249
2250void
2251_get_state (SV *self)
2252 PPCODE:
2253{
2254 AV *defav = GvAV (PL_defgv);
2255 AV *av = newAV ();
2256 int i;
2257 SV *data_sv = newSV (sizeof (struct io_state));
2258 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2259 SvCUR_set (data_sv, sizeof (struct io_state));
2260 SvPOK_only (data_sv);
2261
2262 data->errorno = errno;
2263 data->laststype = PL_laststype;
2264 data->laststatval = PL_laststatval;
2265 data->statcache = PL_statcache;
2266
2267 av_extend (av, AvFILLp (defav) + 1 + 1);
2268
2269 for (i = 0; i <= AvFILLp (defav); ++i)
2270 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2271
2272 av_push (av, data_sv);
2273
2274 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2275
2276 api_ready (self);
2277}
2278
2279void
2280_set_state (SV *state)
2281 PROTOTYPE: $
2282 PPCODE:
2283{
2284 AV *av = (AV *)SvRV (state);
2285 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2286 int i;
2287
2288 errno = data->errorno;
2289 PL_laststype = data->laststype;
2290 PL_laststatval = data->laststatval;
2291 PL_statcache = data->statcache;
2292
2293 EXTEND (SP, AvFILLp (av));
2294 for (i = 0; i < AvFILLp (av); ++i)
2295 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2296}
2297
2298
2299MODULE = Coro::State PACKAGE = Coro::AnyEvent
2300
2301BOOT:
2302 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2303
2304SV *
2305_schedule (...)
2306 PROTOTYPE: @
2307 CODE:
2308{
2309 static int incede;
2310
1126 api_cede (); 2311 api_cede_notself ();
1127 2312
2313 ++incede;
2314 while (coro_nready >= incede && api_cede ())
2315 ;
2316
2317 sv_setsv (sv_activity, &PL_sv_undef);
2318 if (coro_nready >= incede)
2319 {
2320 PUSHMARK (SP);
2321 PUTBACK;
2322 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2323 SPAGAIN;
2324 }
2325
2326 --incede;
2327}
2328
2329
2330MODULE = Coro::State PACKAGE = PerlIO::cede
2331
2332BOOT:
2333 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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