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Comparing Coro/Coro/State.xs (file contents):
Revision 1.45 by root, Tue May 27 01:15:31 2003 UTC vs.
Revision 1.267 by root, Fri Nov 14 06:29:52 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
6 12
7#include <signal.h> 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
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
14# define MAP_ANONYMOUS MAP_ANON 31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# 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
19#endif 43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
20 48
21#define MAY_FLUSH /* increases codesize and is rarely used */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
22 52
23#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 54static int cctx_max_idle = 4;
25 55
26/* The next macro should declare a variable stacklevel that contains and approximation 56#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 57 (PERL_REVISION > (a) \
28 * and should be unique. */ 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#define dSTACKLEVEL volatile char stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 122#define STACKLEVEL ((void *)&stacklevel)
30 123
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 124#define IN_DESTRUCT (PL_main_cv == Nullcv)
32 125
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 126#if __GNUC__ >= 3
127# define attribute(x) __attribute__(x)
128# define expect(expr,value) __builtin_expect ((expr),(value))
129# define INLINE static inline
130#else
131# define attribute(x)
132# define expect(expr,value) (expr)
133# define INLINE static
134#endif
135
136#define expect_false(expr) expect ((expr) != 0, 0)
137#define expect_true(expr) expect ((expr) != 0, 1)
138
139#define NOINLINE attribute ((noinline))
34 140
35#include "CoroAPI.h" 141#include "CoroAPI.h"
36 142
143#ifdef USE_ITHREADS
144
145static perl_mutex coro_lock;
146# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
147# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
148# if CORO_PTHREAD
149static void *coro_thx;
150# endif
151
152#else
153
154# define LOCK (void)0
155# define UNLOCK (void)0
156
157#endif
158
159# undef LOCK
160# define LOCK (void)0
161# undef UNLOCK
162# define UNLOCK (void)0
163
164/* helper storage struct for Coro::AIO */
165struct io_state
166{
167 AV *res;
168 int errorno;
169 I32 laststype; /* U16 in 5.10.0 */
170 int laststatval;
171 Stat_t statcache;
172};
173
174static double (*nvtime)(); /* so why doesn't it take void? */
175
176static U32 cctx_gen;
177static size_t cctx_stacksize = CORO_STACKSIZE;
37static struct CoroAPI coroapi; 178static struct CoroAPI coroapi;
179static AV *main_mainstack; /* used to differentiate between $main and others */
180static JMPENV *main_top_env;
181static HV *coro_state_stash, *coro_stash;
182static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
183static volatile struct coro *transfer_next;
38 184
39/* this is actually not only the c stack but also c registers etc... */ 185struct transfer_args
186{
187 struct coro *prev, *next;
188};
189
190static GV *irsgv; /* $/ */
191static GV *stdoutgv; /* *STDOUT */
192static SV *rv_diehook;
193static SV *rv_warnhook;
194static HV *hv_sig; /* %SIG */
195
196/* async_pool helper stuff */
197static SV *sv_pool_rss;
198static SV *sv_pool_size;
199static AV *av_async_pool;
200
201/* Coro::AnyEvent */
202static SV *sv_activity;
203
204static struct coro_cctx *cctx_first;
205static int cctx_count, cctx_idle;
206
207enum {
208 CC_MAPPED = 0x01,
209 CC_NOREUSE = 0x02, /* throw this away after tracing */
210 CC_TRACE = 0x04,
211 CC_TRACE_SUB = 0x08, /* trace sub calls */
212 CC_TRACE_LINE = 0x10, /* trace each statement */
213 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
214};
215
216/* this is a structure representing a c-level coroutine */
217typedef struct coro_cctx {
218 struct coro_cctx *next;
219
220 /* the stack */
221 void *sptr;
222 size_t ssize;
223
224 /* cpu state */
225 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
226 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
227 JMPENV *top_env;
228 coro_context cctx;
229
230 U32 gen;
231#if CORO_USE_VALGRIND
232 int valgrind_id;
233#endif
234 unsigned char flags;
235} coro_cctx;
236
237enum {
238 CF_RUNNING = 0x0001, /* coroutine is running */
239 CF_READY = 0x0002, /* coroutine is ready */
240 CF_NEW = 0x0004, /* has never been switched to */
241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
242};
243
244/* the structure where most of the perl state is stored, overlaid on the cxstack */
40typedef struct { 245typedef struct {
41 int refcnt; /* pointer reference counter */ 246 SV *defsv;
42 int usecnt; /* shared by how many coroutines */ 247 AV *defav;
43 int gencnt; /* generation counter */ 248 SV *errsv;
249 SV *irsgv;
250#define VAR(name,type) type name;
251# include "state.h"
252#undef VAR
253} perl_slots;
44 254
45 coro_context cctx; 255#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
46 256
47 void *sptr; 257/* this is a structure representing a perl-level coroutine */
48 long ssize; /* positive == mmap, otherwise malloc */
49} coro_stack;
50
51struct coro { 258struct coro {
52 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 259 /* the c coroutine allocated to this perl coroutine, if any */
53 JMPENV start_env; 260 coro_cctx *cctx;
54 261
55 /* the optional C context */ 262 /* process data */
56 coro_stack *stack;
57 void *cursp;
58 int gencnt;
59
60 /* optionally saved, might be zero */
61 AV *defav;
62 SV *defsv;
63 SV *errsv;
64
65 /* saved global state not related to stacks */
66 U8 dowarn;
67 I32 in_eval;
68
69 /* the stacks and related info (callchain etc..) */
70 PERL_SI *curstackinfo;
71 AV *curstack;
72 AV *mainstack; 263 AV *mainstack;
73 SV **stack_sp; 264 perl_slots *slot; /* basically the saved sp */
74 OP *op;
75 SV **curpad;
76 AV *comppad;
77 SV **stack_base;
78 SV **stack_max;
79 SV **tmps_stack;
80 I32 tmps_floor;
81 I32 tmps_ix;
82 I32 tmps_max;
83 I32 *markstack;
84 I32 *markstack_ptr;
85 I32 *markstack_max;
86 I32 *scopestack;
87 I32 scopestack_ix;
88 I32 scopestack_max;
89 ANY *savestack;
90 I32 savestack_ix;
91 I32 savestack_max;
92 OP **retstack;
93 I32 retstack_ix;
94 I32 retstack_max;
95 COP *curcop;
96 JMPENV *top_env;
97 265
98 /* data associated with this coroutine (initial args) */ 266 AV *args; /* data associated with this coroutine (initial args) */
99 AV *args; 267 int refcnt; /* coroutines are refcounted, yes */
268 int flags; /* CF_ flags */
269 HV *hv; /* the perl hash associated with this coro, if any */
270
271 /* statistics */
272 int usecount; /* number of transfers to this coro */
273
274 /* coro process data */
275 int prio;
276 SV *throw; /* exception to be thrown */
277
278 /* async_pool */
279 SV *saved_deffh;
280
281 /* linked list */
282 struct coro *next, *prev;
100}; 283};
101 284
102typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
103typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
104
105static AV *main_mainstack; /* used to differentiate between $main and others */
106static HV *coro_state_stash;
107static SV *ucoro_state_sv;
108static U32 ucoro_state_hash;
109static HV *padlist_cache;
110static SV *coro_mortal; /* will be freed after next transfer */
111
112/* mostly copied from op.c:cv_clone2 */
113STATIC AV *
114clone_padlist (AV *protopadlist)
115{
116 AV *av;
117 I32 ix;
118 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
119 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
120 SV **pname = AvARRAY (protopad_name);
121 SV **ppad = AvARRAY (protopad);
122 I32 fname = AvFILLp (protopad_name);
123 I32 fpad = AvFILLp (protopad);
124 AV *newpadlist, *newpad_name, *newpad;
125 SV **npad;
126
127 newpad_name = newAV ();
128 for (ix = fname; ix >= 0; ix--)
129 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
130
131 newpad = newAV ();
132 av_fill (newpad, AvFILLp (protopad));
133 npad = AvARRAY (newpad);
134
135 newpadlist = newAV ();
136 AvREAL_off (newpadlist);
137 av_store (newpadlist, 0, (SV *) newpad_name);
138 av_store (newpadlist, 1, (SV *) newpad);
139
140 av = newAV (); /* will be @_ */
141 av_extend (av, 0);
142 av_store (newpad, 0, (SV *) av);
143 AvFLAGS (av) = AVf_REIFY;
144
145 for (ix = fpad; ix > 0; ix--)
146 {
147 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
148 if (namesv && namesv != &PL_sv_undef)
149 {
150 char *name = SvPVX (namesv); /* XXX */
151 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
152 { /* lexical from outside? */
153 npad[ix] = SvREFCNT_inc (ppad[ix]);
154 }
155 else
156 { /* our own lexical */
157 SV *sv;
158 if (*name == '&')
159 sv = SvREFCNT_inc (ppad[ix]);
160 else if (*name == '@')
161 sv = (SV *) newAV ();
162 else if (*name == '%')
163 sv = (SV *) newHV ();
164 else
165 sv = NEWSV (0, 0);
166 if (!SvPADBUSY (sv))
167 SvPADMY_on (sv);
168 npad[ix] = sv;
169 }
170 }
171 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
172 {
173 npad[ix] = SvREFCNT_inc (ppad[ix]);
174 }
175 else
176 {
177 SV *sv = NEWSV (0, 0);
178 SvPADTMP_on (sv);
179 npad[ix] = sv;
180 }
181 }
182
183#if 0 /* return -ENOTUNDERSTOOD */
184 /* Now that vars are all in place, clone nested closures. */
185
186 for (ix = fpad; ix > 0; ix--) {
187 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
188 if (namesv
189 && namesv != &PL_sv_undef
190 && !(SvFLAGS(namesv) & SVf_FAKE)
191 && *SvPVX(namesv) == '&'
192 && CvCLONE(ppad[ix]))
193 {
194 CV *kid = cv_clone((CV*)ppad[ix]);
195 SvREFCNT_dec(ppad[ix]);
196 CvCLONE_on(kid);
197 SvPADMY_on(kid);
198 npad[ix] = (SV*)kid;
199 }
200 }
201#endif
202
203 return newpadlist;
204}
205
206#ifdef MAY_FLUSH
207STATIC void
208free_padlist (AV *padlist)
209{
210 /* may be during global destruction */
211 if (SvREFCNT(padlist))
212 {
213 I32 i = AvFILLp(padlist);
214 while (i >= 0)
215 {
216 SV **svp = av_fetch(padlist, i--, FALSE);
217 SV *sv = svp ? *svp : Nullsv;
218 if (sv)
219 SvREFCNT_dec(sv);
220 }
221
222 SvREFCNT_dec((SV*)padlist);
223 }
224}
225#endif
226
227/* the next two functions merely cache the padlists */
228STATIC void
229get_padlist (CV *cv)
230{
231 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
232
233 if (he && AvFILLp ((AV *)*he) >= 0)
234 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
235 else
236 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
237}
238
239STATIC void
240put_padlist (CV *cv)
241{
242 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
243
244 if (SvTYPE (*he) != SVt_PVAV)
245 {
246 SvREFCNT_dec (*he);
247 *he = (SV *)newAV ();
248 }
249
250 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
251}
252
253#ifdef MAY_FLUSH
254STATIC void
255flush_padlist_cache ()
256{
257 HV *hv = padlist_cache;
258 padlist_cache = newHV ();
259
260 if (hv_iterinit (hv))
261 {
262 HE *he;
263 AV *padlist;
264
265 while (!!(he = hv_iternext (hv)))
266 {
267 AV *av = (AV *)HeVAL(he);
268
269 /* casting is fun. */
270 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
271 free_padlist (padlist);
272 }
273 }
274
275 SvREFCNT_dec (hv);
276}
277#endif
278
279#define SB do {
280#define SE } while (0)
281
282#define LOAD(state) load_state(aTHX_ (state));
283#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
284
285#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
286
287static void
288load_state(pTHX_ Coro__State c)
289{
290 PL_dowarn = c->dowarn;
291 PL_in_eval = c->in_eval;
292
293 PL_curstackinfo = c->curstackinfo;
294 PL_curstack = c->curstack;
295 PL_mainstack = c->mainstack;
296 PL_stack_sp = c->stack_sp;
297 PL_op = c->op;
298 PL_curpad = c->curpad;
299 PL_comppad = c->comppad;
300 PL_stack_base = c->stack_base;
301 PL_stack_max = c->stack_max;
302 PL_tmps_stack = c->tmps_stack;
303 PL_tmps_floor = c->tmps_floor;
304 PL_tmps_ix = c->tmps_ix;
305 PL_tmps_max = c->tmps_max;
306 PL_markstack = c->markstack;
307 PL_markstack_ptr = c->markstack_ptr;
308 PL_markstack_max = c->markstack_max;
309 PL_scopestack = c->scopestack;
310 PL_scopestack_ix = c->scopestack_ix;
311 PL_scopestack_max = c->scopestack_max;
312 PL_savestack = c->savestack;
313 PL_savestack_ix = c->savestack_ix;
314 PL_savestack_max = c->savestack_max;
315 PL_retstack = c->retstack;
316 PL_retstack_ix = c->retstack_ix;
317 PL_retstack_max = c->retstack_max;
318 PL_curcop = c->curcop;
319 PL_top_env = c->top_env;
320
321 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
322 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
323 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
324
325 {
326 dSP;
327 CV *cv;
328
329 /* now do the ugly restore mess */
330 while ((cv = (CV *)POPs))
331 {
332 AV *padlist = (AV *)POPs;
333
334 if (padlist)
335 {
336 put_padlist (cv); /* mark this padlist as available */
337 CvPADLIST(cv) = padlist;
338#ifdef USE_THREADS
339 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
340#endif
341 }
342
343 ++CvDEPTH(cv);
344 }
345
346 PUTBACK;
347 }
348}
349
350static void
351save_state(pTHX_ Coro__State c, int flags)
352{
353 {
354 dSP;
355 I32 cxix = cxstack_ix;
356 PERL_CONTEXT *ccstk = cxstack;
357 PERL_SI *top_si = PL_curstackinfo;
358
359 /*
360 * the worst thing you can imagine happens first - we have to save
361 * (and reinitialize) all cv's in the whole callchain :(
362 */
363
364 PUSHs (Nullsv);
365 /* this loop was inspired by pp_caller */
366 for (;;)
367 {
368 while (cxix >= 0)
369 {
370 PERL_CONTEXT *cx = &ccstk[cxix--];
371
372 if (CxTYPE(cx) == CXt_SUB)
373 {
374 CV *cv = cx->blk_sub.cv;
375 if (CvDEPTH(cv))
376 {
377#ifdef USE_THREADS
378 /*XPUSHs ((SV *)CvOWNER(cv));*/
379 /*CvOWNER(cv) = 0;*/
380 /*error must unlock this cv etc.. etc...*/
381#endif
382 EXTEND (SP, CvDEPTH(cv)*2);
383
384 while (--CvDEPTH(cv))
385 {
386 /* this tells the restore code to increment CvDEPTH */
387 PUSHs (Nullsv);
388 PUSHs ((SV *)cv);
389 }
390
391 PUSHs ((SV *)CvPADLIST(cv));
392 PUSHs ((SV *)cv);
393
394 get_padlist (cv); /* this is a monster */
395 }
396 }
397 else if (CxTYPE(cx) == CXt_FORMAT)
398 {
399 /* I never used formats, so how should I know how these are implemented? */
400 /* my bold guess is as a simple, plain sub... */
401 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
402 }
403 }
404
405 if (top_si->si_type == PERLSI_MAIN)
406 break;
407
408 top_si = top_si->si_prev;
409 ccstk = top_si->si_cxstack;
410 cxix = top_si->si_cxix;
411 }
412
413 PUTBACK;
414 }
415
416 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
417 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
418 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
419
420 c->dowarn = PL_dowarn;
421 c->in_eval = PL_in_eval;
422
423 c->curstackinfo = PL_curstackinfo;
424 c->curstack = PL_curstack;
425 c->mainstack = PL_mainstack;
426 c->stack_sp = PL_stack_sp;
427 c->op = PL_op;
428 c->curpad = PL_curpad;
429 c->comppad = PL_comppad;
430 c->stack_base = PL_stack_base;
431 c->stack_max = PL_stack_max;
432 c->tmps_stack = PL_tmps_stack;
433 c->tmps_floor = PL_tmps_floor;
434 c->tmps_ix = PL_tmps_ix;
435 c->tmps_max = PL_tmps_max;
436 c->markstack = PL_markstack;
437 c->markstack_ptr = PL_markstack_ptr;
438 c->markstack_max = PL_markstack_max;
439 c->scopestack = PL_scopestack;
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445 c->retstack = PL_retstack;
446 c->retstack_ix = PL_retstack_ix;
447 c->retstack_max = PL_retstack_max;
448 c->curcop = PL_curcop;
449 c->top_env = PL_top_env;
450}
451
452/*
453 * allocate various perl stacks. This is an exact copy
454 * of perl.c:init_stacks, except that it uses less memory
455 * on the assumption that coroutines do not usually need
456 * a lot of stackspace.
457 */
458STATIC void
459coro_init_stacks (pTHX)
460{
461 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
462 PL_curstackinfo->si_type = PERLSI_MAIN;
463 PL_curstack = PL_curstackinfo->si_stack;
464 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
465
466 PL_stack_base = AvARRAY(PL_curstack);
467 PL_stack_sp = PL_stack_base;
468 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
469
470 New(50,PL_tmps_stack,96,SV*);
471 PL_tmps_floor = -1;
472 PL_tmps_ix = -1;
473 PL_tmps_max = 96;
474
475 New(54,PL_markstack,16,I32);
476 PL_markstack_ptr = PL_markstack;
477 PL_markstack_max = PL_markstack + 16;
478
479 SET_MARK_OFFSET;
480
481 New(54,PL_scopestack,16,I32);
482 PL_scopestack_ix = 0;
483 PL_scopestack_max = 16;
484
485 New(54,PL_savestack,96,ANY);
486 PL_savestack_ix = 0;
487 PL_savestack_max = 96;
488
489 New(54,PL_retstack,8,OP*);
490 PL_retstack_ix = 0;
491 PL_retstack_max = 8;
492}
493
494/*
495 * destroy the stacks, the callchain etc...
496 * still there is a memleak of 128 bytes...
497 */
498STATIC void
499destroy_stacks(pTHX)
500{
501 if (!IN_DESTRUCT)
502 {
503 /* is this ugly, I ask? */
504 while (PL_scopestack_ix)
505 LEAVE;
506
507 /* sure it is, but more important: is it correct?? :/ */
508 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
509 FREETMPS;
510 }
511
512 while (PL_curstackinfo->si_next)
513 PL_curstackinfo = PL_curstackinfo->si_next;
514
515 while (PL_curstackinfo)
516 {
517 PERL_SI *p = PL_curstackinfo->si_prev;
518
519 {
520 dSP;
521 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
522 PUTBACK; /* possibly superfluous */
523 }
524
525 if (!IN_DESTRUCT)
526 {
527 dounwind(-1);
528 SvREFCNT_dec(PL_curstackinfo->si_stack);
529 }
530
531 Safefree(PL_curstackinfo->si_cxstack);
532 Safefree(PL_curstackinfo);
533 PL_curstackinfo = p;
534 }
535
536 Safefree(PL_tmps_stack);
537 Safefree(PL_markstack);
538 Safefree(PL_scopestack);
539 Safefree(PL_savestack);
540 Safefree(PL_retstack);
541}
542
543static void
544allocate_stack (Coro__State ctx, int alloc)
545{
546 coro_stack *stack;
547
548 New (0, stack, 1, coro_stack);
549
550 stack->refcnt = 1;
551 stack->usecnt = 1;
552 stack->gencnt = ctx->gencnt = 0;
553 if (alloc)
554 {
555#if HAVE_MMAP
556 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
558 if (stack->sptr == (void *)-1)
559#endif
560 {
561 /*FIXME*//*D*//* reasonable stack size! */
562 stack->ssize = -4096 * sizeof (long);
563 New (0, stack->sptr, 4096, long);
564 }
565 }
566 else
567 stack->sptr = 0;
568
569 ctx->stack = stack;
570}
571
572static void
573deallocate_stack (Coro__State ctx)
574{
575 coro_stack *stack = ctx->stack;
576
577 ctx->stack = 0;
578
579 if (stack)
580 {
581 if (!--stack->refcnt)
582 {
583#ifdef HAVE_MMAP
584 if (stack->ssize > 0 && stack->sptr)
585 munmap (stack->sptr, stack->ssize);
586 else
587#else
588 Safefree (stack->sptr);
589#endif
590 Safefree (stack);
591 }
592 else if (ctx->gencnt == stack->gencnt)
593 --stack->usecnt;
594 }
595}
596
597static void
598setup_coro (void *arg)
599{
600 /*
601 * emulate part of the perl startup here.
602 */
603 dSP;
604 Coro__State ctx = (Coro__State)arg;
605 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606
607 coro_init_stacks (aTHX);
608 /*PL_curcop = 0;*/
609 /*PL_in_eval = PL_in_eval;*/ /* inherit */
610 SvREFCNT_dec (GvAV (PL_defgv));
611 GvAV (PL_defgv) = ctx->args;
612
613 SPAGAIN;
614
615 if (ctx->stack)
616 {
617 ctx->cursp = 0;
618
619 PUSHMARK(SP);
620 PUTBACK;
621 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
622
623 if (SvTRUE (ERRSV))
624 croak (NULL);
625 else
626 croak ("FATAL: CCTXT coroutine returned!");
627 }
628 else
629 {
630 UNOP myop;
631
632 PL_op = (OP *)&myop;
633
634 Zero(&myop, 1, UNOP);
635 myop.op_next = Nullop;
636 myop.op_flags = OPf_WANT_VOID;
637
638 PUSHMARK(SP);
639 XPUSHs (sub_init);
640 /*
641 * the next line is slightly wrong, as PL_op->op_next
642 * is actually being executed so we skip the first op.
643 * that doesn't matter, though, since it is only
644 * pp_nextstate and we never return...
645 * ah yes, and I don't care anyways ;)
646 */
647 PUTBACK;
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649 SPAGAIN;
650
651 ENTER; /* necessary e.g. for dounwind */
652 }
653}
654
655static void
656continue_coro (void *arg)
657{
658 /*
659 * this is a _very_ stripped down perl interpreter ;)
660 */
661 Coro__State ctx = (Coro__State)arg;
662 JMPENV coro_start_env;
663
664 PL_top_env = &ctx->start_env;
665
666 ctx->cursp = 0;
667 PL_op = PL_op->op_next;
668 CALLRUNOPS(aTHX);
669
670 abort ();
671}
672
673STATIC void
674transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
675{
676 dSTACKLEVEL;
677 static struct coro *xnext;
678
679 if (prev != next)
680 {
681 xnext = next;
682
683 if (next->mainstack)
684 {
685 SAVE (prev, flags);
686 LOAD (next);
687
688 /* mark this state as in-use */
689 next->mainstack = 0;
690 next->tmps_ix = -2;
691
692 /* stacklevel changed? if yes, grab the stack for us! */
693 if (flags & TRANSFER_SAVE_CCTXT)
694 {
695 if (!prev->stack)
696 allocate_stack (prev, 0);
697 else if (prev->cursp != stacklevel
698 && prev->stack->usecnt > 1)
699 {
700 prev->gencnt = ++prev->stack->gencnt;
701 prev->stack->usecnt = 1;
702 }
703
704 /* has our stack been invalidated? */
705 if (next->stack && next->stack->gencnt != next->gencnt)
706 {
707 deallocate_stack (next);
708 allocate_stack (next, 1);
709 coro_create (&(next->stack->cctx),
710 continue_coro, (void *)next,
711 next->stack->sptr, labs (next->stack->ssize));
712 }
713
714 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715 /* don't add any code here */
716 }
717
718 }
719 else if (next->tmps_ix == -2)
720 croak ("tried to transfer to running coroutine");
721 else
722 {
723 SAVE (prev, -1); /* first get rid of the old state */
724
725 if (flags & TRANSFER_SAVE_CCTXT)
726 {
727 if (!prev->stack)
728 allocate_stack (prev, 0);
729
730 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
731 {
732 PL_top_env = &next->start_env;
733
734 setup_coro (next);
735
736 prev->stack->refcnt++;
737 prev->stack->usecnt++;
738 next->stack = prev->stack;
739 next->gencnt = prev->gencnt;
740 }
741 else
742 {
743 allocate_stack (next, 1);
744 coro_create (&(next->stack->cctx),
745 setup_coro, (void *)next,
746 next->stack->sptr, labs (next->stack->ssize));
747 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748 /* don't add any code here */
749 }
750 }
751 else
752 setup_coro (next);
753 }
754
755 /*
756 * xnext is now either prev or next, depending on wether
757 * we switched the c stack or not. that's why I use a global
758 * variable, that should become thread-specific at one point.
759 */
760 xnext->cursp = stacklevel;
761 }
762
763 if (coro_mortal)
764 {
765 SvREFCNT_dec (coro_mortal);
766 coro_mortal = 0;
767 }
768}
769
770#define SV_CORO(sv,func) \
771 do { \
772 if (SvROK (sv)) \
773 sv = SvRV (sv); \
774 \
775 if (SvTYPE(sv) == SVt_PVHV) \
776 { \
777 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
778 \
779 if (!he) \
780 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
781 \
782 (sv) = SvRV (HeVAL(he)); \
783 } \
784 \
785 /* must also be changed inside Coro::Cont::yield */ \
786 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
787 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
788 \
789 } while(0)
790
791#define SvSTATE(sv) (struct coro *)SvIV (sv)
792
793static void
794api_transfer(pTHX_ SV *prev, SV *next, int flags)
795{
796 SV_CORO (prev, "Coro::transfer");
797 SV_CORO (next, "Coro::transfer");
798
799 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
800}
801 287
802/** Coro ********************************************************************/ 288/** Coro ********************************************************************/
803 289
804#define PRIO_MAX 3 290#define PRIO_MAX 3
805#define PRIO_HIGH 1 291#define PRIO_HIGH 1
… …
807#define PRIO_LOW -1 293#define PRIO_LOW -1
808#define PRIO_IDLE -3 294#define PRIO_IDLE -3
809#define PRIO_MIN -4 295#define PRIO_MIN -4
810 296
811/* for Coro.pm */ 297/* for Coro.pm */
812static GV *coro_current, *coro_idle; 298static SV *coro_current;
299static SV *coro_readyhook;
813static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 300static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
814static int coro_nready; 301static int coro_nready;
302static struct coro *coro_first;
303
304/** lowlevel stuff **********************************************************/
305
306static SV *
307coro_get_sv (pTHX_ const char *name, int create)
308{
309#if PERL_VERSION_ATLEAST (5,10,0)
310 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
311 get_sv (name, create);
312#endif
313 return get_sv (name, create);
314}
315
316static AV *
317coro_get_av (pTHX_ const char *name, int create)
318{
319#if PERL_VERSION_ATLEAST (5,10,0)
320 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
321 get_av (name, create);
322#endif
323 return get_av (name, create);
324}
325
326static HV *
327coro_get_hv (pTHX_ const char *name, int create)
328{
329#if PERL_VERSION_ATLEAST (5,10,0)
330 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
331 get_hv (name, create);
332#endif
333 return get_hv (name, create);
334}
335
336static AV *
337coro_clone_padlist (pTHX_ CV *cv)
338{
339 AV *padlist = CvPADLIST (cv);
340 AV *newpadlist, *newpad;
341
342 newpadlist = newAV ();
343 AvREAL_off (newpadlist);
344#if PERL_VERSION_ATLEAST (5,10,0)
345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
346#else
347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
348#endif
349 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
350 --AvFILLp (padlist);
351
352 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
353 av_store (newpadlist, 1, (SV *)newpad);
354
355 return newpadlist;
356}
815 357
816static void 358static void
817coro_enq (SV *sv) 359free_padlist (pTHX_ AV *padlist)
818{ 360{
819 if (SvTYPE (sv) == SVt_PVHV) 361 /* may be during global destruction */
820 { 362 if (SvREFCNT (padlist))
821 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
822 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
823
824 prio = prio > PRIO_MAX ? PRIO_MAX
825 : prio < PRIO_MIN ? PRIO_MIN
826 : prio;
827
828 av_push (coro_ready [prio - PRIO_MIN], sv);
829 coro_nready++;
830
831 return;
832 } 363 {
833 364 I32 i = AvFILLp (padlist);
834 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 365 while (i >= 0)
835}
836
837static SV *
838coro_deq (int min_prio)
839{
840 int prio = PRIO_MAX - PRIO_MIN;
841
842 min_prio -= PRIO_MIN;
843 if (min_prio < 0)
844 min_prio = 0;
845
846 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
847 if (av_len (coro_ready[prio]) >= 0)
848 { 366 {
849 coro_nready--; 367 SV **svp = av_fetch (padlist, i--, FALSE);
850 return av_shift (coro_ready[prio]); 368 if (svp)
369 {
370 SV *sv;
371 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
372 SvREFCNT_dec (sv);
373
374 SvREFCNT_dec (*svp);
375 }
851 } 376 }
377
378 SvREFCNT_dec ((SV*)padlist);
379 }
380}
381
382static int
383coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
384{
385 AV *padlist;
386 AV *av = (AV *)mg->mg_obj;
387
388 /* casting is fun. */
389 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
390 free_padlist (aTHX_ padlist);
391
392 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
852 393
853 return 0; 394 return 0;
854} 395}
855 396
856static void 397#define CORO_MAGIC_type_cv PERL_MAGIC_ext
857api_ready (SV *coro) 398#define CORO_MAGIC_type_state PERL_MAGIC_ext
399
400static MGVTBL coro_cv_vtbl = {
401 0, 0, 0, 0,
402 coro_cv_free
403};
404
405#define CORO_MAGIC(sv, type) \
406 SvMAGIC (sv) \
407 ? SvMAGIC (sv)->mg_type == type \
408 ? SvMAGIC (sv) \
409 : mg_find (sv, type) \
410 : 0
411
412#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
413#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
414
415INLINE struct coro *
416SvSTATE_ (pTHX_ SV *coro)
858{ 417{
418 HV *stash;
419 MAGIC *mg;
420
859 if (SvROK (coro)) 421 if (SvROK (coro))
860 coro = SvRV (coro); 422 coro = SvRV (coro);
861 423
424 if (expect_false (SvTYPE (coro) != SVt_PVHV))
425 croak ("Coro::State object required");
426
427 stash = SvSTASH (coro);
428 if (expect_false (stash != coro_stash && stash != coro_state_stash))
429 {
430 /* very slow, but rare, check */
431 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
432 croak ("Coro::State object required");
433 }
434
435 mg = CORO_MAGIC_state (coro);
436 return (struct coro *)mg->mg_ptr;
437}
438
439#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
440
441/* the next two functions merely cache the padlists */
442static void
443get_padlist (pTHX_ CV *cv)
444{
445 MAGIC *mg = CORO_MAGIC_cv (cv);
446 AV *av;
447
448 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
449 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
450 else
451 {
452#if CORO_PREFER_PERL_FUNCTIONS
453 /* this is probably cleaner? but also slower! */
454 /* in practise, it seems to be less stable */
455 CV *cp = Perl_cv_clone (cv);
456 CvPADLIST (cv) = CvPADLIST (cp);
457 CvPADLIST (cp) = 0;
458 SvREFCNT_dec (cp);
459#else
460 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
461#endif
462 }
463}
464
465static void
466put_padlist (pTHX_ CV *cv)
467{
468 MAGIC *mg = CORO_MAGIC_cv (cv);
469 AV *av;
470
471 if (expect_false (!mg))
472 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
473
474 av = (AV *)mg->mg_obj;
475
476 if (expect_false (AvFILLp (av) >= AvMAX (av)))
477 av_extend (av, AvMAX (av) + 1);
478
479 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
480}
481
482/** load & save, init *******************************************************/
483
484static void
485load_perl (pTHX_ Coro__State c)
486{
487 perl_slots *slot = c->slot;
488 c->slot = 0;
489
490 PL_mainstack = c->mainstack;
491
492 GvSV (PL_defgv) = slot->defsv;
493 GvAV (PL_defgv) = slot->defav;
494 GvSV (PL_errgv) = slot->errsv;
495 GvSV (irsgv) = slot->irsgv;
496
497 #define VAR(name,type) PL_ ## name = slot->name;
498 # include "state.h"
499 #undef VAR
500
501 {
502 dSP;
503
504 CV *cv;
505
506 /* now do the ugly restore mess */
507 while (expect_true (cv = (CV *)POPs))
508 {
509 put_padlist (aTHX_ cv); /* mark this padlist as available */
510 CvDEPTH (cv) = PTR2IV (POPs);
511 CvPADLIST (cv) = (AV *)POPs;
512 }
513
514 PUTBACK;
515 }
516}
517
518static void
519save_perl (pTHX_ Coro__State c)
520{
521 {
522 dSP;
523 I32 cxix = cxstack_ix;
524 PERL_CONTEXT *ccstk = cxstack;
525 PERL_SI *top_si = PL_curstackinfo;
526
527 /*
528 * the worst thing you can imagine happens first - we have to save
529 * (and reinitialize) all cv's in the whole callchain :(
530 */
531
532 XPUSHs (Nullsv);
533 /* this loop was inspired by pp_caller */
534 for (;;)
535 {
536 while (expect_true (cxix >= 0))
537 {
538 PERL_CONTEXT *cx = &ccstk[cxix--];
539
540 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
541 {
542 CV *cv = cx->blk_sub.cv;
543
544 if (expect_true (CvDEPTH (cv)))
545 {
546 EXTEND (SP, 3);
547 PUSHs ((SV *)CvPADLIST (cv));
548 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
549 PUSHs ((SV *)cv);
550
551 CvDEPTH (cv) = 0;
552 get_padlist (aTHX_ cv);
553 }
554 }
555 }
556
557 if (expect_true (top_si->si_type == PERLSI_MAIN))
558 break;
559
560 top_si = top_si->si_prev;
561 ccstk = top_si->si_cxstack;
562 cxix = top_si->si_cxix;
563 }
564
565 PUTBACK;
566 }
567
568 /* allocate some space on the context stack for our purposes */
569 /* we manually unroll here, as usually 2 slots is enough */
570 if (SLOT_COUNT >= 1) CXINC;
571 if (SLOT_COUNT >= 2) CXINC;
572 if (SLOT_COUNT >= 3) CXINC;
573 {
574 int i;
575 for (i = 3; i < SLOT_COUNT; ++i)
576 CXINC;
577 }
578 cxstack_ix -= SLOT_COUNT; /* undo allocation */
579
580 c->mainstack = PL_mainstack;
581
582 {
583 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
584
585 slot->defav = GvAV (PL_defgv);
586 slot->defsv = DEFSV;
587 slot->errsv = ERRSV;
588 slot->irsgv = GvSV (irsgv);
589
590 #define VAR(name,type) slot->name = PL_ ## name;
591 # include "state.h"
592 #undef VAR
593 }
594}
595
596/*
597 * allocate various perl stacks. This is an exact copy
598 * of perl.c:init_stacks, except that it uses less memory
599 * on the (sometimes correct) assumption that coroutines do
600 * not usually need a lot of stackspace.
601 */
602#if CORO_PREFER_PERL_FUNCTIONS
603# define coro_init_stacks init_stacks
604#else
605static void
606coro_init_stacks (pTHX)
607{
608 PL_curstackinfo = new_stackinfo(32, 8);
609 PL_curstackinfo->si_type = PERLSI_MAIN;
610 PL_curstack = PL_curstackinfo->si_stack;
611 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
612
613 PL_stack_base = AvARRAY(PL_curstack);
614 PL_stack_sp = PL_stack_base;
615 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
616
617 New(50,PL_tmps_stack,32,SV*);
618 PL_tmps_floor = -1;
619 PL_tmps_ix = -1;
620 PL_tmps_max = 32;
621
622 New(54,PL_markstack,16,I32);
623 PL_markstack_ptr = PL_markstack;
624 PL_markstack_max = PL_markstack + 16;
625
626#ifdef SET_MARK_OFFSET
627 SET_MARK_OFFSET;
628#endif
629
630 New(54,PL_scopestack,8,I32);
631 PL_scopestack_ix = 0;
632 PL_scopestack_max = 8;
633
634 New(54,PL_savestack,24,ANY);
635 PL_savestack_ix = 0;
636 PL_savestack_max = 24;
637
638#if !PERL_VERSION_ATLEAST (5,10,0)
639 New(54,PL_retstack,4,OP*);
640 PL_retstack_ix = 0;
641 PL_retstack_max = 4;
642#endif
643}
644#endif
645
646/*
647 * destroy the stacks, the callchain etc...
648 */
649static void
650coro_destruct_stacks (pTHX)
651{
652 while (PL_curstackinfo->si_next)
653 PL_curstackinfo = PL_curstackinfo->si_next;
654
655 while (PL_curstackinfo)
656 {
657 PERL_SI *p = PL_curstackinfo->si_prev;
658
659 if (!IN_DESTRUCT)
660 SvREFCNT_dec (PL_curstackinfo->si_stack);
661
662 Safefree (PL_curstackinfo->si_cxstack);
663 Safefree (PL_curstackinfo);
664 PL_curstackinfo = p;
665 }
666
667 Safefree (PL_tmps_stack);
668 Safefree (PL_markstack);
669 Safefree (PL_scopestack);
670 Safefree (PL_savestack);
671#if !PERL_VERSION_ATLEAST (5,10,0)
672 Safefree (PL_retstack);
673#endif
674}
675
676static size_t
677coro_rss (pTHX_ struct coro *coro)
678{
679 size_t rss = sizeof (*coro);
680
681 if (coro->mainstack)
682 {
683 perl_slots tmp_slot;
684 perl_slots *slot;
685
686 if (coro->flags & CF_RUNNING)
687 {
688 slot = &tmp_slot;
689
690 #define VAR(name,type) slot->name = PL_ ## name;
691 # include "state.h"
692 #undef VAR
693 }
694 else
695 slot = coro->slot;
696
697 if (slot)
698 {
699 rss += sizeof (slot->curstackinfo);
700 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
701 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
702 rss += slot->tmps_max * sizeof (SV *);
703 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
704 rss += slot->scopestack_max * sizeof (I32);
705 rss += slot->savestack_max * sizeof (ANY);
706
707#if !PERL_VERSION_ATLEAST (5,10,0)
708 rss += slot->retstack_max * sizeof (OP *);
709#endif
710 }
711 }
712
713 return rss;
714}
715
716/** set stacklevel support **************************************************/
717
718/* we sometimes need to create the effect of pp_set_stacklevel calling us */
719#define SSL_HEAD (void)0
720/* we sometimes need to create the effect of leaving via pp_set_stacklevel */
721#define SSL_TAIL set_stacklevel_tail (aTHX)
722
723INLINE void
724set_stacklevel_tail (pTHX)
725{
726 dSP;
727 SV **bot = SP;
728
729 int gimme = GIMME_V;
730
731 /* make sure we put something on the stack in scalar context */
732 if (gimme == G_SCALAR)
733 {
734 if (sp == bot)
735 XPUSHs (&PL_sv_undef);
736
737 SP = bot + 1;
738 }
739
740 PUTBACK;
741}
742
743/** coroutine stack handling ************************************************/
744
745static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
746static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
747static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
748
749/* apparently < 5.8.8 */
750#ifndef MgPV_nolen_const
751#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
752 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
753 (const char*)(mg)->mg_ptr)
754#endif
755
756/*
757 * This overrides the default magic get method of %SIG elements.
758 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
759 * and instead of tryign to save and restore the hash elements, we just provide
760 * readback here.
761 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
762 * not expecting this to actually change the hook. This is a potential problem
763 * when a schedule happens then, but we ignore this.
764 */
765static int
766coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
780 return 0;
781 }
782 }
783
784 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
785}
786
787static int
788coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
789{
790 const char *s = MgPV_nolen_const (mg);
791
792 if (*s == '_')
793 {
794 SV **svp = 0;
795
796 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
797 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
798
799 if (svp)
800 {
801 SV *old = *svp;
802 *svp = 0;
803 SvREFCNT_dec (old);
804 return 0;
805 }
806 }
807
808 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
809}
810
811static int
812coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
813{
814 const char *s = MgPV_nolen_const (mg);
815
816 if (*s == '_')
817 {
818 SV **svp = 0;
819
820 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
821 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
822
823 if (svp)
824 {
825 SV *old = *svp;
826 *svp = newSVsv (sv);
827 SvREFCNT_dec (old);
828 return 0;
829 }
830 }
831
832 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
833}
834
835static void
836coro_setup (pTHX_ struct coro *coro)
837{
838 /*
839 * emulate part of the perl startup here.
840 */
841 coro_init_stacks (aTHX);
842
843 PL_runops = RUNOPS_DEFAULT;
844 PL_curcop = &PL_compiling;
845 PL_in_eval = EVAL_NULL;
846 PL_comppad = 0;
847 PL_curpm = 0;
848 PL_curpad = 0;
849 PL_localizing = 0;
850 PL_dirty = 0;
851 PL_restartop = 0;
852#if PERL_VERSION_ATLEAST (5,10,0)
853 PL_parser = 0;
854#endif
855
856 /* recreate the die/warn hooks */
857 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
858 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
859
860 GvSV (PL_defgv) = newSV (0);
861 GvAV (PL_defgv) = coro->args; coro->args = 0;
862 GvSV (PL_errgv) = newSV (0);
863 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
864 PL_rs = newSVsv (GvSV (irsgv));
865 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
866
867 {
868 dSP;
869 UNOP myop;
870
871 Zero (&myop, 1, UNOP);
872 myop.op_next = Nullop;
873 myop.op_flags = OPf_WANT_VOID;
874
875 PUSHMARK (SP);
876 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
877 PUTBACK;
878 PL_op = (OP *)&myop;
879 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
880 SPAGAIN;
881 }
882
883 /* this newly created coroutine might be run on an existing cctx which most
884 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
885 * so we have to emulate entering pp_set_stacklevel here.
886 */
887 SSL_HEAD;
888}
889
890static void
891coro_destruct (pTHX_ struct coro *coro)
892{
893 if (!IN_DESTRUCT)
894 {
895 /* restore all saved variables and stuff */
896 LEAVE_SCOPE (0);
897 assert (PL_tmps_floor == -1);
898
899 /* free all temporaries */
900 FREETMPS;
901 assert (PL_tmps_ix == -1);
902
903 /* unwind all extra stacks */
904 POPSTACK_TO (PL_mainstack);
905
906 /* unwind main stack */
907 dounwind (-1);
908 }
909
910 SvREFCNT_dec (GvSV (PL_defgv));
911 SvREFCNT_dec (GvAV (PL_defgv));
912 SvREFCNT_dec (GvSV (PL_errgv));
913 SvREFCNT_dec (PL_defoutgv);
914 SvREFCNT_dec (PL_rs);
915 SvREFCNT_dec (GvSV (irsgv));
916
917 SvREFCNT_dec (PL_diehook);
918 SvREFCNT_dec (PL_warnhook);
919
920 SvREFCNT_dec (coro->saved_deffh);
921 SvREFCNT_dec (coro->throw);
922
923 coro_destruct_stacks (aTHX);
924}
925
926INLINE void
927free_coro_mortal (pTHX)
928{
929 if (expect_true (coro_mortal))
930 {
931 SvREFCNT_dec (coro_mortal);
932 coro_mortal = 0;
933 }
934}
935
936static int
937runops_trace (pTHX)
938{
939 COP *oldcop = 0;
940 int oldcxix = -2;
941 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
942 coro_cctx *cctx = coro->cctx;
943
944 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
945 {
946 PERL_ASYNC_CHECK ();
947
948 if (cctx->flags & CC_TRACE_ALL)
949 {
950 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
951 {
952 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
953 SV **bot, **top;
954 AV *av = newAV (); /* return values */
955 SV **cb;
956 dSP;
957
958 GV *gv = CvGV (cx->blk_sub.cv);
959 SV *fullname = sv_2mortal (newSV (0));
960 if (isGV (gv))
961 gv_efullname3 (fullname, gv, 0);
962
963 bot = PL_stack_base + cx->blk_oldsp + 1;
964 top = cx->blk_gimme == G_ARRAY ? SP + 1
965 : cx->blk_gimme == G_SCALAR ? bot + 1
966 : bot;
967
968 av_extend (av, top - bot);
969 while (bot < top)
970 av_push (av, SvREFCNT_inc_NN (*bot++));
971
972 PL_runops = RUNOPS_DEFAULT;
973 ENTER;
974 SAVETMPS;
975 EXTEND (SP, 3);
976 PUSHMARK (SP);
977 PUSHs (&PL_sv_no);
978 PUSHs (fullname);
979 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
980 PUTBACK;
981 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
982 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
983 SPAGAIN;
984 FREETMPS;
985 LEAVE;
986 PL_runops = runops_trace;
987 }
988
989 if (oldcop != PL_curcop)
990 {
991 oldcop = PL_curcop;
992
993 if (PL_curcop != &PL_compiling)
994 {
995 SV **cb;
996
997 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
998 {
999 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1000
1001 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1002 {
1003 runops_proc_t old_runops = PL_runops;
1004 dSP;
1005 GV *gv = CvGV (cx->blk_sub.cv);
1006 SV *fullname = sv_2mortal (newSV (0));
1007
1008 if (isGV (gv))
1009 gv_efullname3 (fullname, gv, 0);
1010
1011 PL_runops = RUNOPS_DEFAULT;
1012 ENTER;
1013 SAVETMPS;
1014 EXTEND (SP, 3);
1015 PUSHMARK (SP);
1016 PUSHs (&PL_sv_yes);
1017 PUSHs (fullname);
1018 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1019 PUTBACK;
1020 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1021 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1022 SPAGAIN;
1023 FREETMPS;
1024 LEAVE;
1025 PL_runops = runops_trace;
1026 }
1027
1028 oldcxix = cxstack_ix;
1029 }
1030
1031 if (cctx->flags & CC_TRACE_LINE)
1032 {
1033 dSP;
1034
1035 PL_runops = RUNOPS_DEFAULT;
1036 ENTER;
1037 SAVETMPS;
1038 EXTEND (SP, 3);
1039 PL_runops = RUNOPS_DEFAULT;
1040 PUSHMARK (SP);
1041 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1042 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1043 PUTBACK;
1044 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1045 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1046 SPAGAIN;
1047 FREETMPS;
1048 LEAVE;
1049 PL_runops = runops_trace;
1050 }
1051 }
1052 }
1053 }
1054 }
1055
1056 TAINT_NOT;
1057 return 0;
1058}
1059
1060static void
1061prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1062{
1063 ta->prev = (struct coro *)cctx;
1064 ta->next = 0;
1065}
1066
1067/* inject a fake call to Coro::State::_cctx_init into the execution */
1068/* _cctx_init should be careful, as it could be called at almost any time */
1069/* during execution of a perl program */
1070/* also initialises PL_top_env */
1071static void NOINLINE
1072cctx_prepare (pTHX_ coro_cctx *cctx)
1073{
1074 dSP;
1075 UNOP myop;
1076
1077 PL_top_env = &PL_start_env;
1078
1079 if (cctx->flags & CC_TRACE)
1080 PL_runops = runops_trace;
1081
1082 Zero (&myop, 1, UNOP);
1083 myop.op_next = PL_op;
1084 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1085
1086 PUSHMARK (SP);
1087 EXTEND (SP, 2);
1088 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1089 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1090 PUTBACK;
1091 PL_op = (OP *)&myop;
1092 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1093 SPAGAIN;
1094}
1095
1096/* the tail of transfer: execute stuff we can only do after a transfer */
1097INLINE void
1098transfer_tail (pTHX)
1099{
1100 struct coro *next = (struct coro *)transfer_next;
1101 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1102 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1103
1104 free_coro_mortal (aTHX);
1105 UNLOCK;
1106
1107 if (expect_false (next->throw))
1108 {
1109 SV *exception = sv_2mortal (next->throw);
1110
1111 next->throw = 0;
1112 sv_setsv (ERRSV, exception);
1113 croak (0);
1114 }
1115}
1116
1117/*
1118 * this is a _very_ stripped down perl interpreter ;)
1119 */
1120static void
1121cctx_run (void *arg)
1122{
1123#ifdef USE_ITHREADS
1124# if CORO_PTHREAD
1125 PERL_SET_CONTEXT (coro_thx);
1126# endif
1127#endif
1128 {
1129 dTHX;
1130
1131 /* we are the alternative tail to pp_set_stacklevel */
1132 /* so do the same things here */
1133 SSL_TAIL;
1134
1135 /* we now skip the op that did lead to transfer() */
1136 PL_op = PL_op->op_next;
1137
1138 /* inject a fake subroutine call to cctx_init */
1139 cctx_prepare (aTHX_ (coro_cctx *)arg);
1140
1141 /* cctx_run is the alternative tail of transfer() */
1142 transfer_tail (aTHX);
1143
1144 /* somebody or something will hit me for both perl_run and PL_restartop */
1145 PL_restartop = PL_op;
1146 perl_run (PL_curinterp);
1147
1148 /*
1149 * If perl-run returns we assume exit() was being called or the coro
1150 * fell off the end, which seems to be the only valid (non-bug)
1151 * reason for perl_run to return. We try to exit by jumping to the
1152 * bootstrap-time "top" top_env, as we cannot restore the "main"
1153 * coroutine as Coro has no such concept
1154 */
1155 PL_top_env = main_top_env;
1156 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1157 }
1158}
1159
1160static coro_cctx *
1161cctx_new ()
1162{
1163 coro_cctx *cctx;
1164
1165 ++cctx_count;
1166 New (0, cctx, 1, coro_cctx);
1167
1168 cctx->gen = cctx_gen;
1169 cctx->flags = 0;
1170 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1171
1172 return cctx;
1173}
1174
1175/* create a new cctx only suitable as source */
1176static coro_cctx *
1177cctx_new_empty ()
1178{
1179 coro_cctx *cctx = cctx_new ();
1180
1181 cctx->sptr = 0;
1182 coro_create (&cctx->cctx, 0, 0, 0, 0);
1183
1184 return cctx;
1185}
1186
1187/* create a new cctx suitable as destination/running a perl interpreter */
1188static coro_cctx *
1189cctx_new_run ()
1190{
1191 coro_cctx *cctx = cctx_new ();
1192 void *stack_start;
1193 size_t stack_size;
1194
1195#if HAVE_MMAP
1196 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1197 /* mmap supposedly does allocate-on-write for us */
1198 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1199
1200 if (cctx->sptr != (void *)-1)
1201 {
1202 #if CORO_STACKGUARD
1203 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1204 #endif
1205 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1206 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1207 cctx->flags |= CC_MAPPED;
1208 }
1209 else
1210#endif
1211 {
1212 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1213 New (0, cctx->sptr, cctx_stacksize, long);
1214
1215 if (!cctx->sptr)
1216 {
1217 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1218 _exit (EXIT_FAILURE);
1219 }
1220
1221 stack_start = cctx->sptr;
1222 stack_size = cctx->ssize;
1223 }
1224
1225 #if CORO_USE_VALGRIND
1226 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1227 #endif
1228
1229 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1230
1231 return cctx;
1232}
1233
1234static void
1235cctx_destroy (coro_cctx *cctx)
1236{
1237 if (!cctx)
1238 return;
1239
1240 --cctx_count;
1241 coro_destroy (&cctx->cctx);
1242
1243 /* coro_transfer creates new, empty cctx's */
1244 if (cctx->sptr)
1245 {
1246 #if CORO_USE_VALGRIND
1247 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1248 #endif
1249
1250#if HAVE_MMAP
1251 if (cctx->flags & CC_MAPPED)
1252 munmap (cctx->sptr, cctx->ssize);
1253 else
1254#endif
1255 Safefree (cctx->sptr);
1256 }
1257
1258 Safefree (cctx);
1259}
1260
1261/* wether this cctx should be destructed */
1262#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1263
1264static coro_cctx *
1265cctx_get (pTHX)
1266{
1267 while (expect_true (cctx_first))
1268 {
1269 coro_cctx *cctx = cctx_first;
1270 cctx_first = cctx->next;
1271 --cctx_idle;
1272
1273 if (expect_true (!CCTX_EXPIRED (cctx)))
1274 return cctx;
1275
1276 cctx_destroy (cctx);
1277 }
1278
1279 return cctx_new_run ();
1280}
1281
1282static void
1283cctx_put (coro_cctx *cctx)
1284{
1285 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1286
1287 /* free another cctx if overlimit */
1288 if (expect_false (cctx_idle >= cctx_max_idle))
1289 {
1290 coro_cctx *first = cctx_first;
1291 cctx_first = first->next;
1292 --cctx_idle;
1293
1294 cctx_destroy (first);
1295 }
1296
1297 ++cctx_idle;
1298 cctx->next = cctx_first;
1299 cctx_first = cctx;
1300}
1301
1302/** coroutine switching *****************************************************/
1303
1304static void
1305transfer_check (pTHX_ struct coro *prev, struct coro *next)
1306{
1307 if (expect_true (prev != next))
1308 {
1309 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1310 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1311
1312 if (expect_false (next->flags & CF_RUNNING))
1313 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1314
1315 if (expect_false (next->flags & CF_DESTROYED))
1316 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1317
1318#if !PERL_VERSION_ATLEAST (5,10,0)
1319 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1320 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1321#endif
1322 }
1323}
1324
1325/* always use the TRANSFER macro */
1326static void NOINLINE
1327transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1328{
1329 dSTACKLEVEL;
1330
1331 /* sometimes transfer is only called to set idle_sp */
1332 if (expect_false (!next))
1333 {
1334 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1335 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1336 }
1337 else if (expect_true (prev != next))
1338 {
1339 coro_cctx *prev__cctx;
1340
1341 if (expect_false (prev->flags & CF_NEW))
1342 {
1343 /* create a new empty/source context */
1344 prev->cctx = cctx_new_empty ();
1345 prev->flags &= ~CF_NEW;
1346 prev->flags |= CF_RUNNING;
1347 }
1348
1349 prev->flags &= ~CF_RUNNING;
1350 next->flags |= CF_RUNNING;
1351
1352 LOCK;
1353
1354 /* first get rid of the old state */
1355 save_perl (aTHX_ prev);
1356
1357 if (expect_false (next->flags & CF_NEW))
1358 {
1359 /* need to start coroutine */
1360 next->flags &= ~CF_NEW;
1361 /* setup coroutine call */
1362 coro_setup (aTHX_ next);
1363 }
1364 else
1365 load_perl (aTHX_ next);
1366
1367 prev__cctx = prev->cctx;
1368
1369 /* possibly untie and reuse the cctx */
1370 if (expect_true (
1371 prev__cctx->idle_sp == STACKLEVEL
1372 && !(prev__cctx->flags & CC_TRACE)
1373 && !force_cctx
1374 ))
1375 {
1376 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1377 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1378
1379 prev->cctx = 0;
1380
1381 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1382 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1383 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1384 if (!next->cctx)
1385 next->cctx = cctx_get (aTHX);
1386
1387 cctx_put (prev__cctx);
1388 }
1389
1390 ++next->usecount;
1391
1392 if (expect_true (!next->cctx))
1393 next->cctx = cctx_get (aTHX);
1394
1395 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1396 transfer_next = next;
1397
1398 if (expect_false (prev__cctx != next->cctx))
1399 {
1400 prev__cctx->top_env = PL_top_env;
1401 PL_top_env = next->cctx->top_env;
1402 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1403 }
1404
1405 transfer_tail (aTHX);
1406 }
1407}
1408
1409#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1410#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1411
1412/** high level stuff ********************************************************/
1413
1414static int
1415coro_state_destroy (pTHX_ struct coro *coro)
1416{
1417 if (coro->flags & CF_DESTROYED)
1418 return 0;
1419
1420 coro->flags |= CF_DESTROYED;
1421
1422 if (coro->flags & CF_READY)
1423 {
1424 /* reduce nready, as destroying a ready coro effectively unreadies it */
1425 /* alternative: look through all ready queues and remove the coro */
1426 LOCK;
1427 --coro_nready;
1428 UNLOCK;
1429 }
1430 else
1431 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1432
1433 if (coro->mainstack && coro->mainstack != main_mainstack)
1434 {
1435 struct coro temp;
1436
1437 if (coro->flags & CF_RUNNING)
1438 croak ("FATAL: tried to destroy currently running coroutine");
1439
1440 save_perl (aTHX_ &temp);
1441 load_perl (aTHX_ coro);
1442
1443 coro_destruct (aTHX_ coro);
1444
1445 load_perl (aTHX_ &temp);
1446
1447 coro->slot = 0;
1448 }
1449
1450 cctx_destroy (coro->cctx);
1451 SvREFCNT_dec (coro->args);
1452
1453 if (coro->next) coro->next->prev = coro->prev;
1454 if (coro->prev) coro->prev->next = coro->next;
1455 if (coro == coro_first) coro_first = coro->next;
1456
1457 return 1;
1458}
1459
1460static int
1461coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1462{
1463 struct coro *coro = (struct coro *)mg->mg_ptr;
1464 mg->mg_ptr = 0;
1465
1466 coro->hv = 0;
1467
1468 if (--coro->refcnt < 0)
1469 {
1470 coro_state_destroy (aTHX_ coro);
1471 Safefree (coro);
1472 }
1473
1474 return 0;
1475}
1476
1477static int
1478coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1479{
1480 struct coro *coro = (struct coro *)mg->mg_ptr;
1481
1482 ++coro->refcnt;
1483
1484 return 0;
1485}
1486
1487static MGVTBL coro_state_vtbl = {
1488 0, 0, 0, 0,
1489 coro_state_free,
1490 0,
1491#ifdef MGf_DUP
1492 coro_state_dup,
1493#else
1494# define MGf_DUP 0
1495#endif
1496};
1497
1498static void
1499prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1500{
1501 ta->prev = SvSTATE (prev_sv);
1502 ta->next = SvSTATE (next_sv);
1503 TRANSFER_CHECK (*ta);
1504}
1505
1506static void
1507api_transfer (SV *prev_sv, SV *next_sv)
1508{
1509 dTHX;
1510 struct transfer_args ta;
1511
1512 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1513 TRANSFER (ta, 1);
1514}
1515
1516/** Coro ********************************************************************/
1517
1518static void
1519coro_enq (pTHX_ SV *coro_sv)
1520{
1521 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1522}
1523
1524static SV *
1525coro_deq (pTHX)
1526{
1527 int prio;
1528
1529 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1530 if (AvFILLp (coro_ready [prio]) >= 0)
1531 return av_shift (coro_ready [prio]);
1532
1533 return 0;
1534}
1535
1536static int
1537api_ready (SV *coro_sv)
1538{
1539 dTHX;
1540 struct coro *coro;
1541 SV *sv_hook;
1542 void (*xs_hook)(void);
1543
1544 if (SvROK (coro_sv))
1545 coro_sv = SvRV (coro_sv);
1546
1547 coro = SvSTATE (coro_sv);
1548
1549 if (coro->flags & CF_READY)
1550 return 0;
1551
1552 coro->flags |= CF_READY;
1553
1554 LOCK;
1555
1556 sv_hook = coro_nready ? 0 : coro_readyhook;
1557 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1558
862 coro_enq (SvREFCNT_inc (coro)); 1559 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1560 ++coro_nready;
1561
1562 UNLOCK;
1563
1564 if (sv_hook)
1565 {
1566 dSP;
1567
1568 ENTER;
1569 SAVETMPS;
1570
1571 PUSHMARK (SP);
1572 PUTBACK;
1573 call_sv (sv_hook, G_DISCARD);
1574 SPAGAIN;
1575
1576 FREETMPS;
1577 LEAVE;
1578 }
1579
1580 if (xs_hook)
1581 xs_hook ();
1582
1583 return 1;
1584}
1585
1586static int
1587api_is_ready (SV *coro_sv)
1588{
1589 dTHX;
1590
1591 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1592}
1593
1594INLINE void
1595prepare_schedule (pTHX_ struct transfer_args *ta)
1596{
1597 SV *prev_sv, *next_sv;
1598
1599 for (;;)
1600 {
1601 LOCK;
1602 next_sv = coro_deq (aTHX);
1603
1604 /* nothing to schedule: call the idle handler */
1605 if (expect_false (!next_sv))
1606 {
1607 dSP;
1608 UNLOCK;
1609
1610 ENTER;
1611 SAVETMPS;
1612
1613 PUSHMARK (SP);
1614 PUTBACK;
1615 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1616 SPAGAIN;
1617
1618 FREETMPS;
1619 LEAVE;
1620 continue;
1621 }
1622
1623 ta->next = SvSTATE (next_sv);
1624
1625 /* cannot transfer to destroyed coros, skip and look for next */
1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1627 {
1628 UNLOCK;
1629 SvREFCNT_dec (next_sv);
1630 /* coro_nready has already been taken care of by destroy */
1631 continue;
1632 }
1633
1634 --coro_nready;
1635 UNLOCK;
1636 break;
1637 }
1638
1639 /* free this only after the transfer */
1640 prev_sv = SvRV (coro_current);
1641 ta->prev = SvSTATE (prev_sv);
1642 TRANSFER_CHECK (*ta);
1643 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1644 ta->next->flags &= ~CF_READY;
1645 SvRV_set (coro_current, next_sv);
1646
1647 LOCK;
1648 free_coro_mortal (aTHX);
1649 coro_mortal = prev_sv;
1650 UNLOCK;
1651}
1652
1653INLINE void
1654prepare_cede (pTHX_ struct transfer_args *ta)
1655{
1656 api_ready (coro_current);
1657 prepare_schedule (aTHX_ ta);
1658}
1659
1660static void
1661prepare_cede_notself (pTHX_ struct transfer_args *ta)
1662{
1663 SV *prev = SvRV (coro_current);
1664
1665 if (coro_nready)
1666 {
1667 prepare_schedule (aTHX_ ta);
1668 api_ready (prev);
1669 }
1670 else
1671 ta->prev = ta->next = SvSTATE (prev);
863} 1672}
864 1673
865static void 1674static void
866api_schedule (void) 1675api_schedule (void)
867{ 1676{
868 SV *prev, *next; 1677 dTHX;
1678 struct transfer_args ta;
869 1679
870 prev = SvRV (GvSV (coro_current)); 1680 prepare_schedule (aTHX_ &ta);
871 next = coro_deq (PRIO_MIN); 1681 TRANSFER (ta, 1);
1682}
872 1683
873 if (!next) 1684static int
874 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1685api_cede (void)
1686{
1687 dTHX;
1688 struct transfer_args ta;
875 1689
876 /* free this only after the transfer */ 1690 prepare_cede (aTHX_ &ta);
877 coro_mortal = prev;
878 SV_CORO (prev, "Coro::schedule");
879 1691
880 SvRV (GvSV (coro_current)) = next; 1692 if (expect_true (ta.prev != ta.next))
1693 {
1694 TRANSFER (ta, 1);
1695 return 1;
1696 }
1697 else
1698 return 0;
1699}
881 1700
882 SV_CORO (next, "Coro::schedule"); 1701static int
1702api_cede_notself (void)
1703{
1704 if (coro_nready)
1705 {
1706 dTHX;
1707 struct transfer_args ta;
883 1708
884 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1709 prepare_cede_notself (aTHX_ &ta);
885 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1710 TRANSFER (ta, 1);
1711 return 1;
1712 }
1713 else
1714 return 0;
886} 1715}
887 1716
888static void 1717static void
889api_cede (void) 1718api_trace (SV *coro_sv, int flags)
890{ 1719{
891 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1720 dTHX;
1721 struct coro *coro = SvSTATE (coro_sv);
892 1722
1723 if (flags & CC_TRACE)
1724 {
1725 if (!coro->cctx)
1726 coro->cctx = cctx_new_run ();
1727 else if (!(coro->cctx->flags & CC_TRACE))
1728 croak ("cannot enable tracing on coroutine with custom stack");
1729
1730 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1731 }
1732 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1733 {
1734 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1735
1736 if (coro->flags & CF_RUNNING)
1737 PL_runops = RUNOPS_DEFAULT;
1738 else
1739 coro->slot->runops = RUNOPS_DEFAULT;
1740 }
1741}
1742
1743#if 0
1744static int
1745coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1746{
1747 AV *padlist;
1748 AV *av = (AV *)mg->mg_obj;
1749
1750 abort ();
1751
1752 return 0;
1753}
1754
1755static MGVTBL coro_gensub_vtbl = {
1756 0, 0, 0, 0,
1757 coro_gensub_free
1758};
1759#endif
1760
1761/*****************************************************************************/
1762/* PerlIO::cede */
1763
1764typedef struct
1765{
1766 PerlIOBuf base;
1767 NV next, every;
1768} PerlIOCede;
1769
1770static IV
1771PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1772{
1773 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1774
1775 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1776 self->next = nvtime () + self->every;
1777
1778 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1779}
1780
1781static SV *
1782PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1783{
1784 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1785
1786 return newSVnv (self->every);
1787}
1788
1789static IV
1790PerlIOCede_flush (pTHX_ PerlIO *f)
1791{
1792 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1793 double now = nvtime ();
1794
1795 if (now >= self->next)
1796 {
893 api_schedule (); 1797 api_cede ();
894} 1798 self->next = now + self->every;
1799 }
895 1800
1801 return PerlIOBuf_flush (aTHX_ f);
1802}
1803
1804static PerlIO_funcs PerlIO_cede =
1805{
1806 sizeof(PerlIO_funcs),
1807 "cede",
1808 sizeof(PerlIOCede),
1809 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1810 PerlIOCede_pushed,
1811 PerlIOBuf_popped,
1812 PerlIOBuf_open,
1813 PerlIOBase_binmode,
1814 PerlIOCede_getarg,
1815 PerlIOBase_fileno,
1816 PerlIOBuf_dup,
1817 PerlIOBuf_read,
1818 PerlIOBuf_unread,
1819 PerlIOBuf_write,
1820 PerlIOBuf_seek,
1821 PerlIOBuf_tell,
1822 PerlIOBuf_close,
1823 PerlIOCede_flush,
1824 PerlIOBuf_fill,
1825 PerlIOBase_eof,
1826 PerlIOBase_error,
1827 PerlIOBase_clearerr,
1828 PerlIOBase_setlinebuf,
1829 PerlIOBuf_get_base,
1830 PerlIOBuf_bufsiz,
1831 PerlIOBuf_get_ptr,
1832 PerlIOBuf_get_cnt,
1833 PerlIOBuf_set_ptrcnt,
1834};
1835
1836/*****************************************************************************/
1837
1838static const CV *ssl_cv; /* for quick consistency check */
1839
1840static UNOP ssl_restore; /* restore stack as entersub did, for first-re-run */
1841static SV *ssl_arg0;
1842static SV *ssl_arg1;
1843
1844/* this restores the stack in the case we patched the entersub, to */
1845/* recreate the stack frame as perl will on following calls */
1846/* since entersub cleared the stack */
1847static OP *
1848pp_restore (pTHX)
1849{
1850 dSP;
1851
1852 PUSHMARK (SP);
1853
1854 EXTEND (SP, 3);
1855 if (ssl_arg0) PUSHs (sv_2mortal (ssl_arg0)), ssl_arg0 = 0;
1856 if (ssl_arg1) PUSHs (sv_2mortal (ssl_arg1)), ssl_arg1 = 0;
1857 PUSHs ((SV *)CvGV (ssl_cv));
1858
1859 RETURNOP (ssl_restore.op_first);
1860}
1861
1862#define OPpENTERSUB_SSL 15 /* the part of op_private entersub hopefully doesn't use */
1863
1864/* declare prototype */
1865XS(XS_Coro__State__set_stacklevel);
1866
1867/*
1868 * these not obviously related functions are all rolled into one
1869 * function to increase chances that they all will call transfer with the same
1870 * stack offset
1871 */
1872static OP *
1873pp_set_stacklevel (pTHX)
1874{
1875 dSP;
1876 struct transfer_args ta;
1877 SV **arg = PL_stack_base + TOPMARK + 1;
1878 int items = SP - arg; /* args without function object */
1879
1880 /* do a quick consistency check on the "function" object, and if it isn't */
1881 /* for us, divert to the real entersub */
1882 if (SvTYPE (*sp) != SVt_PVGV || CvXSUB (GvCV (*sp)) != XS_Coro__State__set_stacklevel)
1883 return PL_ppaddr[OP_ENTERSUB](aTHX);
1884
1885 /* pop args */
1886 SP = PL_stack_base + POPMARK;
1887
1888 if (!(PL_op->op_flags & OPf_STACKED))
1889 {
1890 /* ampersand-form of call, use @_ instead of stack */
1891 AV *av = GvAV (PL_defgv);
1892 arg = AvARRAY (av);
1893 items = AvFILLp (av) + 1;
1894 }
1895
1896 PUTBACK;
1897 switch (PL_op->op_private & OPpENTERSUB_SSL)
1898 {
1899 case 0:
1900 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
1901 break;
1902
1903 case 1:
1904 if (items != 2)
1905 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1906
1907 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1908 break;
1909
1910 case 2:
1911 prepare_schedule (aTHX_ &ta);
1912 break;
1913
1914 case 3:
1915 prepare_cede (aTHX_ &ta);
1916 break;
1917
1918 case 4:
1919 prepare_cede_notself (aTHX_ &ta);
1920 break;
1921 }
1922
1923 TRANSFER (ta, 0);
1924 SPAGAIN;
1925
1926skip:
1927 PUTBACK;
1928 SSL_TAIL;
1929 SPAGAIN;
1930 RETURN;
1931}
1932
1933static void
1934coro_ssl_patch (pTHX_ CV *cv, int ix, SV **args, int items)
1935{
1936 assert (("FATAL: ssl call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_set_stacklevel));
1937
1938 assert (("FATAL: ssl call with illegal CV value", CvGV (cv)));
1939 ssl_cv = cv;
1940
1941 /* we patch the op, and then re-run the whole call */
1942 /* we have to put some dummy argument on the stack for this to work */
1943 ssl_restore.op_next = (OP *)&ssl_restore;
1944 ssl_restore.op_type = OP_NULL;
1945 ssl_restore.op_ppaddr = pp_restore;
1946 ssl_restore.op_first = PL_op;
1947
1948 ssl_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1949 ssl_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1950
1951 PL_op->op_ppaddr = pp_set_stacklevel;
1952 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SSL | ix; /* we potentially share our private flags with entersub */
1953
1954 PL_op = (OP *)&ssl_restore;
1955}
1956
896MODULE = Coro::State PACKAGE = Coro::State 1957MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
897 1958
898PROTOTYPES: ENABLE 1959PROTOTYPES: DISABLE
899 1960
900BOOT: 1961BOOT:
901{ /* {} necessary for stoopid perl-5.6.x */ 1962{
902 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1963#ifdef USE_ITHREADS
903 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1964 MUTEX_INIT (&coro_lock);
1965# if CORO_PTHREAD
1966 coro_thx = PERL_GET_CONTEXT;
1967# endif
1968#endif
1969 BOOT_PAGESIZE;
1970
1971 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1972 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1973
1974 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1975 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1976 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1977
1978 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1979 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1980 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1981
904 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1982 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
905 1983
906 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1984 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
907 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1985 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
908 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1986 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
909 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1987 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
910
911 if (!padlist_cache)
912 padlist_cache = newHV ();
913 1988
914 main_mainstack = PL_mainstack; 1989 main_mainstack = PL_mainstack;
1990 main_top_env = PL_top_env;
915 1991
1992 while (main_top_env->je_prev)
1993 main_top_env = main_top_env->je_prev;
1994
916 coroapi.ver = CORO_API_VERSION; 1995 coroapi.ver = CORO_API_VERSION;
1996 coroapi.rev = CORO_API_REVISION;
917 coroapi.transfer = api_transfer; 1997 coroapi.transfer = api_transfer;
918}
919 1998
920Coro::State 1999 {
921_newprocess(args) 2000 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
922 SV * args 2001
923 PROTOTYPE: $ 2002 if (!svp) croak ("Time::HiRes is required");
2003 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2004
2005 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2006 }
2007
2008 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2009}
2010
2011SV *
2012new (char *klass, ...)
924 CODE: 2013 CODE:
925 Coro__State coro; 2014{
2015 struct coro *coro;
2016 MAGIC *mg;
2017 HV *hv;
2018 int i;
926 2019
927 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
928 croak ("Coro::State::_newprocess expects an arrayref");
929
930 New (0, coro, 1, struct coro); 2020 Newz (0, coro, 1, struct coro);
2021 coro->args = newAV ();
2022 coro->flags = CF_NEW;
931 2023
932 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2024 if (coro_first) coro_first->prev = coro;
933 coro->mainstack = 0; /* actual work is done inside transfer */ 2025 coro->next = coro_first;
934 coro->stack = 0; 2026 coro_first = coro;
935 2027
936 /* same as JMPENV_BOOTSTRAP */ 2028 coro->hv = hv = newHV ();
937 /* we might be able to recycle start_env, but safe is safe */ 2029 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
938 Zero(&coro->start_env, 1, JMPENV); 2030 mg->mg_flags |= MGf_DUP;
939 coro->start_env.je_ret = -1; 2031 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
940 coro->start_env.je_mustcatch = TRUE;
941 2032
942 RETVAL = coro; 2033 av_extend (coro->args, items - 1);
2034 for (i = 1; i < items; i++)
2035 av_push (coro->args, newSVsv (ST (i)));
2036}
943 OUTPUT: 2037 OUTPUT:
944 RETVAL 2038 RETVAL
945 2039
946void 2040void
947transfer(prev, next, flags) 2041_set_stacklevel (...)
948 SV *prev 2042 ALIAS:
949 SV *next 2043 Coro::State::transfer = 1
950 int flags 2044 Coro::schedule = 2
951 PROTOTYPE: @ 2045 Coro::cede = 3
2046 Coro::cede_notself = 4
952 CODE: 2047 CODE:
953 PUTBACK; 2048 coro_ssl_patch (aTHX_ cv, ix, &ST (0), items);
954 SV_CORO (next, "Coro::transfer"); 2049
955 SV_CORO (prev, "Coro::transfer"); 2050bool
956 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2051_destroy (SV *coro_sv)
957 SPAGAIN; 2052 CODE:
2053 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2054 OUTPUT:
2055 RETVAL
958 2056
959void 2057void
960DESTROY(coro) 2058_exit (int code)
961 Coro::State coro 2059 PROTOTYPE: $
962 CODE: 2060 CODE:
2061 _exit (code);
963 2062
964 if (coro->mainstack && coro->mainstack != main_mainstack) 2063int
2064cctx_stacksize (int new_stacksize = 0)
2065 CODE:
2066 RETVAL = cctx_stacksize;
2067 if (new_stacksize)
2068 {
2069 cctx_stacksize = new_stacksize;
2070 ++cctx_gen;
2071 }
2072 OUTPUT:
2073 RETVAL
2074
2075int
2076cctx_max_idle (int max_idle = 0)
2077 CODE:
2078 RETVAL = cctx_max_idle;
2079 if (max_idle > 1)
2080 cctx_max_idle = max_idle;
2081 OUTPUT:
2082 RETVAL
2083
2084int
2085cctx_count ()
2086 CODE:
2087 RETVAL = cctx_count;
2088 OUTPUT:
2089 RETVAL
2090
2091int
2092cctx_idle ()
2093 CODE:
2094 RETVAL = cctx_idle;
2095 OUTPUT:
2096 RETVAL
2097
2098void
2099list ()
2100 PPCODE:
2101{
2102 struct coro *coro;
2103 for (coro = coro_first; coro; coro = coro->next)
2104 if (coro->hv)
2105 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2106}
2107
2108void
2109call (Coro::State coro, SV *coderef)
2110 ALIAS:
2111 eval = 1
2112 CODE:
2113{
2114 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
965 { 2115 {
966 struct coro temp; 2116 struct coro temp;
967 2117
2118 if (!(coro->flags & CF_RUNNING))
2119 {
2120 PUTBACK;
2121 save_perl (aTHX_ &temp);
2122 load_perl (aTHX_ coro);
2123 }
2124
2125 {
2126 dSP;
2127 ENTER;
2128 SAVETMPS;
968 PUTBACK; 2129 PUTBACK;
969 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2130 PUSHSTACK;
970 LOAD(aTHX_ coro); 2131 PUSHMARK (SP);
2132
2133 if (ix)
2134 eval_sv (coderef, 0);
2135 else
2136 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2137
2138 POPSTACK;
971 SPAGAIN; 2139 SPAGAIN;
2140 FREETMPS;
2141 LEAVE;
2142 PUTBACK;
2143 }
972 2144
973 destroy_stacks (aTHX); 2145 if (!(coro->flags & CF_RUNNING))
974 2146 {
975 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2147 save_perl (aTHX_ coro);
2148 load_perl (aTHX_ &temp);
976 SPAGAIN; 2149 SPAGAIN;
977 2150 }
978 coro->mainstack = 0;
979 } 2151 }
2152}
980 2153
981 deallocate_stack (coro); 2154SV *
982 2155is_ready (Coro::State coro)
983 Safefree (coro); 2156 PROTOTYPE: $
2157 ALIAS:
2158 is_ready = CF_READY
2159 is_running = CF_RUNNING
2160 is_new = CF_NEW
2161 is_destroyed = CF_DESTROYED
2162 CODE:
2163 RETVAL = boolSV (coro->flags & ix);
2164 OUTPUT:
2165 RETVAL
984 2166
985void 2167void
986flush() 2168throw (Coro::State self, SV *throw = &PL_sv_undef)
987 CODE: 2169 PROTOTYPE: $;$
988#ifdef MAY_FLUSH 2170 CODE:
989 flush_padlist_cache (); 2171 SvREFCNT_dec (self->throw);
990#endif 2172 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
991 2173
992void 2174void
993_exit(code) 2175api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
994 int code 2176
2177SV *
2178has_cctx (Coro::State coro)
995 PROTOTYPE: $ 2179 PROTOTYPE: $
996 CODE: 2180 CODE:
997#if defined(__GLIBC__) || _POSIX_C_SOURCE 2181 RETVAL = boolSV (!!coro->cctx);
998 _exit (code); 2182 OUTPUT:
999#else 2183 RETVAL
1000 signal (SIGTERM, SIG_DFL);
1001 raise (SIGTERM);
1002 exit (code);
1003#endif
1004 2184
1005MODULE = Coro::State PACKAGE = Coro::Cont 2185int
2186is_traced (Coro::State coro)
2187 PROTOTYPE: $
2188 CODE:
2189 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2190 OUTPUT:
2191 RETVAL
1006 2192
1007# this is slightly dirty (should expose a c-level api) 2193UV
2194rss (Coro::State coro)
2195 PROTOTYPE: $
2196 ALIAS:
2197 usecount = 1
2198 CODE:
2199 switch (ix)
2200 {
2201 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2202 case 1: RETVAL = coro->usecount; break;
2203 }
2204 OUTPUT:
2205 RETVAL
1008 2206
1009void 2207void
1010yield(...) 2208force_cctx ()
2209 CODE:
2210 struct coro *coro = SvSTATE (coro_current);
2211 coro->cctx->idle_sp = 0;
2212
2213void
2214swap_defsv (Coro::State self)
1011 PROTOTYPE: @ 2215 PROTOTYPE: $
2216 ALIAS:
2217 swap_defav = 1
1012 CODE: 2218 CODE:
1013 static SV *returnstk; 2219 if (!self->slot)
1014 SV *sv; 2220 croak ("cannot swap state with coroutine that has no saved state");
1015 AV *defav = GvAV (PL_defgv); 2221 else
1016 struct coro *prev, *next; 2222 {
2223 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2224 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1017 2225
1018 if (!returnstk) 2226 SV *tmp = *src; *src = *dst; *dst = tmp;
1019 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2227 }
1020
1021 /* set up @_ -- ugly */
1022 av_clear (defav);
1023 av_fill (defav, items - 1);
1024 while (items--)
1025 av_store (defav, items, SvREFCNT_inc (ST(items)));
1026
1027 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1028 sv = av_pop ((AV *)SvRV (returnstk));
1029 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1030 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1031 SvREFCNT_dec (sv);
1032
1033 transfer(aTHX_ prev, next, 0);
1034 2228
1035MODULE = Coro::State PACKAGE = Coro 2229MODULE = Coro::State PACKAGE = Coro
1036 2230
1037# this is slightly dirty (should expose a c-level api)
1038
1039BOOT: 2231BOOT:
1040{ 2232{
1041 int i; 2233 int i;
2234
2235 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2236 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2237 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2238
2239 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2240 SvREADONLY_on (coro_current);
2241
1042 HV *stash = gv_stashpv ("Coro", TRUE); 2242 coro_stash = gv_stashpv ("Coro", TRUE);
1043 2243
1044 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2244 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2245 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2246 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2247 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2248 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2249 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050
1051 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053 2250
1054 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2251 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055 coro_ready[i] = newAV (); 2252 coro_ready[i] = newAV ();
1056 2253
1057 { 2254 {
1058 SV *sv = perl_get_sv("Coro::API", 1); 2255 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1059 2256
1060 coroapi.schedule = api_schedule; 2257 coroapi.schedule = api_schedule;
1061 coroapi.cede = api_cede; 2258 coroapi.cede = api_cede;
2259 coroapi.cede_notself = api_cede_notself;
1062 coroapi.ready = api_ready; 2260 coroapi.ready = api_ready;
2261 coroapi.is_ready = api_is_ready;
1063 coroapi.nready = &coro_nready; 2262 coroapi.nready = &coro_nready;
1064 coroapi.current = coro_current; 2263 coroapi.current = coro_current;
1065 2264
1066 GCoroAPI = &coroapi; 2265 GCoroAPI = &coroapi;
1067 sv_setiv(sv, (IV)&coroapi); 2266 sv_setiv (sv, (IV)&coroapi);
1068 SvREADONLY_on(sv); 2267 SvREADONLY_on (sv);
1069 } 2268 }
1070} 2269}
1071 2270
1072void 2271void
1073ready(self) 2272_set_current (SV *current)
1074 SV * self
1075 PROTOTYPE: $ 2273 PROTOTYPE: $
1076 CODE: 2274 CODE:
1077 api_ready (self); 2275 SvREFCNT_dec (SvRV (coro_current));
2276 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2277
2278void
2279_set_readyhook (SV *hook)
2280 PROTOTYPE: $
2281 CODE:
2282 LOCK;
2283 SvREFCNT_dec (coro_readyhook);
2284 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2285 UNLOCK;
1078 2286
1079int 2287int
2288prio (Coro::State coro, int newprio = 0)
2289 ALIAS:
2290 nice = 1
2291 CODE:
2292{
2293 RETVAL = coro->prio;
2294
2295 if (items > 1)
2296 {
2297 if (ix)
2298 newprio = coro->prio - newprio;
2299
2300 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2301 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2302
2303 coro->prio = newprio;
2304 }
2305}
2306 OUTPUT:
2307 RETVAL
2308
2309SV *
2310ready (SV *self)
2311 PROTOTYPE: $
2312 CODE:
2313 RETVAL = boolSV (api_ready (self));
2314 OUTPUT:
2315 RETVAL
2316
2317int
1080nready(...) 2318nready (...)
1081 PROTOTYPE: 2319 PROTOTYPE:
1082 CODE: 2320 CODE:
1083 RETVAL = coro_nready; 2321 RETVAL = coro_nready;
1084 OUTPUT: 2322 OUTPUT:
1085 RETVAL 2323 RETVAL
1086 2324
2325# for async_pool speedup
1087void 2326void
1088schedule(...) 2327_pool_1 (SV *cb)
1089 PROTOTYPE:
1090 CODE: 2328 CODE:
1091 api_schedule (); 2329{
2330 struct coro *coro = SvSTATE (coro_current);
2331 HV *hv = (HV *)SvRV (coro_current);
2332 AV *defav = GvAV (PL_defgv);
2333 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2334 AV *invoke_av;
2335 int i, len;
2336
2337 if (!invoke)
2338 {
2339 SV *old = PL_diehook;
2340 PL_diehook = 0;
2341 SvREFCNT_dec (old);
2342 croak ("\3async_pool terminate\2\n");
2343 }
2344
2345 SvREFCNT_dec (coro->saved_deffh);
2346 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2347
2348 hv_store (hv, "desc", sizeof ("desc") - 1,
2349 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2350
2351 invoke_av = (AV *)SvRV (invoke);
2352 len = av_len (invoke_av);
2353
2354 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2355
2356 if (len > 0)
2357 {
2358 av_fill (defav, len - 1);
2359 for (i = 0; i < len; ++i)
2360 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2361 }
2362
2363 SvREFCNT_dec (invoke);
2364}
1092 2365
1093void 2366void
1094cede(...) 2367_pool_2 (SV *cb)
1095 PROTOTYPE:
1096 CODE: 2368 CODE:
2369{
2370 struct coro *coro = SvSTATE (coro_current);
2371
2372 sv_setsv (cb, &PL_sv_undef);
2373
2374 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2375 coro->saved_deffh = 0;
2376
2377 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2378 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2379 {
2380 SV *old = PL_diehook;
2381 PL_diehook = 0;
2382 SvREFCNT_dec (old);
2383 croak ("\3async_pool terminate\2\n");
2384 }
2385
2386 av_clear (GvAV (PL_defgv));
2387 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2388 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2389
2390 coro->prio = 0;
2391
2392 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2393 api_trace (coro_current, 0);
2394
2395 av_push (av_async_pool, newSVsv (coro_current));
2396}
2397
2398#if 0
2399
2400void
2401_generator_call (...)
2402 PROTOTYPE: @
2403 PPCODE:
2404 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2405 xxxx
2406 abort ();
2407
2408SV *
2409gensub (SV *sub, ...)
2410 PROTOTYPE: &;@
2411 CODE:
2412{
2413 struct coro *coro;
2414 MAGIC *mg;
2415 CV *xcv;
2416 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2417 int i;
2418
2419 CvGV (ncv) = CvGV (cv);
2420 CvFILE (ncv) = CvFILE (cv);
2421
2422 Newz (0, coro, 1, struct coro);
2423 coro->args = newAV ();
2424 coro->flags = CF_NEW;
2425
2426 av_extend (coro->args, items - 1);
2427 for (i = 1; i < items; i++)
2428 av_push (coro->args, newSVsv (ST (i)));
2429
2430 CvISXSUB_on (ncv);
2431 CvXSUBANY (ncv).any_ptr = (void *)coro;
2432
2433 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2434
2435 CvXSUB (ncv) = CvXSUB (xcv);
2436 CvANON_on (ncv);
2437
2438 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2439 RETVAL = newRV_noinc ((SV *)ncv);
2440}
2441 OUTPUT:
2442 RETVAL
2443
2444#endif
2445
2446
2447MODULE = Coro::State PACKAGE = Coro::AIO
2448
2449void
2450_get_state (SV *self)
2451 PPCODE:
2452{
2453 AV *defav = GvAV (PL_defgv);
2454 AV *av = newAV ();
2455 int i;
2456 SV *data_sv = newSV (sizeof (struct io_state));
2457 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2458 SvCUR_set (data_sv, sizeof (struct io_state));
2459 SvPOK_only (data_sv);
2460
2461 data->errorno = errno;
2462 data->laststype = PL_laststype;
2463 data->laststatval = PL_laststatval;
2464 data->statcache = PL_statcache;
2465
2466 av_extend (av, AvFILLp (defav) + 1 + 1);
2467
2468 for (i = 0; i <= AvFILLp (defav); ++i)
2469 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2470
2471 av_push (av, data_sv);
2472
2473 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2474
2475 api_ready (self);
2476}
2477
2478void
2479_set_state (SV *state)
2480 PROTOTYPE: $
2481 PPCODE:
2482{
2483 AV *av = (AV *)SvRV (state);
2484 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2485 int i;
2486
2487 errno = data->errorno;
2488 PL_laststype = data->laststype;
2489 PL_laststatval = data->laststatval;
2490 PL_statcache = data->statcache;
2491
2492 EXTEND (SP, AvFILLp (av));
2493 for (i = 0; i < AvFILLp (av); ++i)
2494 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2495}
2496
2497
2498MODULE = Coro::State PACKAGE = Coro::AnyEvent
2499
2500BOOT:
2501 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2502
2503SV *
2504_schedule (...)
2505 PROTOTYPE: @
2506 CODE:
2507{
2508 static int incede;
2509
1097 api_cede (); 2510 api_cede_notself ();
1098 2511
2512 ++incede;
2513 while (coro_nready >= incede && api_cede ())
2514 ;
2515
2516 sv_setsv (sv_activity, &PL_sv_undef);
2517 if (coro_nready >= incede)
2518 {
2519 PUSHMARK (SP);
2520 PUTBACK;
2521 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2522 SPAGAIN;
2523 }
2524
2525 --incede;
2526}
2527
2528
2529MODULE = Coro::State PACKAGE = PerlIO::cede
2530
2531BOOT:
2532 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2533

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