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Comparing Coro/Coro/State.xs (file contents):
Revision 1.29 by root, Sat Aug 25 21:40:34 2001 UTC vs.
Revision 1.271 by root, Fri Nov 14 07:35:32 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_ANON
13# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 30# ifdef 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#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
29#define dSTACKLEVEL void *stacklevel = &stacklevel 124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
30 126
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
32 143
33#include "CoroAPI.h" 144#include "CoroAPI.h"
34 145
146#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
155#else
156
157# define LOCK (void)0
158# define UNLOCK (void)0
159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
36 187
37/* this is actually not only the c stack but also c registers etc... */ 188struct transfer_args
189{
190 struct coro *prev, *next;
191};
192
193static GV *irsgv; /* $/ */
194static GV *stdoutgv; /* *STDOUT */
195static SV *rv_diehook;
196static SV *rv_warnhook;
197static HV *hv_sig; /* %SIG */
198
199/* async_pool helper stuff */
200static SV *sv_pool_rss;
201static SV *sv_pool_size;
202static AV *av_async_pool;
203
204/* Coro::AnyEvent */
205static SV *sv_activity;
206
207static struct coro_cctx *cctx_first;
208static int cctx_count, cctx_idle;
209
210enum {
211 CC_MAPPED = 0x01,
212 CC_NOREUSE = 0x02, /* throw this away after tracing */
213 CC_TRACE = 0x04,
214 CC_TRACE_SUB = 0x08, /* trace sub calls */
215 CC_TRACE_LINE = 0x10, /* trace each statement */
216 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
217};
218
219/* this is a structure representing a c-level coroutine */
220typedef struct coro_cctx {
221 struct coro_cctx *next;
222
223 /* the stack */
224 void *sptr;
225 size_t ssize;
226
227 /* cpu state */
228 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
229 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
230 JMPENV *top_env;
231 coro_context cctx;
232
233 U32 gen;
234#if CORO_USE_VALGRIND
235 int valgrind_id;
236#endif
237 unsigned char flags;
238} coro_cctx;
239
240enum {
241 CF_RUNNING = 0x0001, /* coroutine is running */
242 CF_READY = 0x0002, /* coroutine is ready */
243 CF_NEW = 0x0004, /* has never been switched to */
244 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
245};
246
247/* the structure where most of the perl state is stored, overlaid on the cxstack */
38typedef struct { 248typedef struct {
39 int refcnt; /* pointer reference counter */ 249 SV *defsv;
40 int usecnt; /* shared by how many coroutines */ 250 AV *defav;
41 int gencnt; /* generation counter */ 251 SV *errsv;
252 SV *irsgv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
42 257
43 coro_context cctx; 258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
44 259
45 void *sptr; 260/* this is a structure representing a perl-level coroutine */
46 long ssize; /* positive == mmap, otherwise malloc */
47} coro_stack;
48
49struct coro { 261struct coro {
50 /* the optional C context */ 262 /* the c coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 263 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 264
55 /* optionally saved, might be zero */ 265 /* process data */
56 AV *defav;
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63
64 /* the stacks and related info (callchain etc..) */
65 PERL_SI *curstackinfo;
66 AV *curstack;
67 AV *mainstack; 266 AV *mainstack;
68 SV **stack_sp; 267 perl_slots *slot; /* basically the saved sp */
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 268
92 /* data associated with this coroutine (initial args) */ 269 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 270 int refcnt; /* coroutines are refcounted, yes */
271 int flags; /* CF_ flags */
272 HV *hv; /* the perl hash associated with this coro, if any */
273
274 /* statistics */
275 int usecount; /* number of transfers to this coro */
276
277 /* coro process data */
278 int prio;
279 SV *throw; /* exception to be thrown */
280
281 /* async_pool */
282 SV *saved_deffh;
283
284 /* linked list */
285 struct coro *next, *prev;
94}; 286};
95 287
96typedef struct coro *Coro__State; 288typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 289typedef struct coro *Coro__State_or_hashref;
98
99static AV *main_mainstack; /* used to differentiate between $main and others */
100static HV *coro_state_stash;
101static SV *ucoro_state_sv;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104
105/* mostly copied from op.c:cv_clone2 */
106STATIC AV *
107clone_padlist (AV *protopadlist)
108{
109 AV *av;
110 I32 ix;
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113 SV **pname = AvARRAY (protopad_name);
114 SV **ppad = AvARRAY (protopad);
115 I32 fname = AvFILLp (protopad_name);
116 I32 fpad = AvFILLp (protopad);
117 AV *newpadlist, *newpad_name, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127
128 newpadlist = newAV ();
129 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name);
131 av_store (newpadlist, 1, (SV *) newpad);
132
133 av = newAV (); /* will be @_ */
134 av_extend (av, 0);
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137
138 for (ix = fpad; ix > 0; ix--)
139 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
141 if (namesv && namesv != &PL_sv_undef)
142 {
143 char *name = SvPVX (namesv); /* XXX */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
145 { /* lexical from outside? */
146 npad[ix] = SvREFCNT_inc (ppad[ix]);
147 }
148 else
149 { /* our own lexical */
150 SV *sv;
151 if (*name == '&')
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175
176#if 0 /* return -ENOTUNDERSTOOD */
177 /* Now that vars are all in place, clone nested closures. */
178
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC void
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316
317 {
318 dSP;
319 CV *cv;
320
321 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs))
323 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist;
330#ifdef USE_THREADS
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 }
337
338 PUTBACK;
339 }
340}
341
342static void
343save_state(pTHX_ Coro__State c, int flags)
344{
345 {
346 dSP;
347 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo;
350
351 /*
352 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :(
354 */
355
356 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */
358 for (;;)
359 {
360 do
361 {
362 PERL_CONTEXT *cx = &ccstk[cxix--];
363
364 if (CxTYPE(cx) == CXt_SUB)
365 {
366 CV *cv = cx->blk_sub.cv;
367 if (CvDEPTH(cv))
368 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv));
384 PUSHs ((SV *)cv);
385
386 get_padlist (cv); /* this is a monster */
387 }
388 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 }
396 while (cxix >= 0);
397
398 if (top_si->si_type == PERLSI_MAIN)
399 break;
400
401 top_si = top_si->si_prev;
402 ccstk = top_si->si_cxstack;
403 cxix = top_si->si_cxix;
404 }
405
406 PUTBACK;
407 }
408
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412
413 c->dowarn = PL_dowarn;
414 c->in_eval = PL_in_eval;
415
416 c->curstackinfo = PL_curstackinfo;
417 c->curstack = PL_curstack;
418 c->mainstack = PL_mainstack;
419 c->stack_sp = PL_stack_sp;
420 c->op = PL_op;
421 c->curpad = PL_curpad;
422 c->stack_base = PL_stack_base;
423 c->stack_max = PL_stack_max;
424 c->tmps_stack = PL_tmps_stack;
425 c->tmps_floor = PL_tmps_floor;
426 c->tmps_ix = PL_tmps_ix;
427 c->tmps_max = PL_tmps_max;
428 c->markstack = PL_markstack;
429 c->markstack_ptr = PL_markstack_ptr;
430 c->markstack_max = PL_markstack_max;
431 c->scopestack = PL_scopestack;
432 c->scopestack_ix = PL_scopestack_ix;
433 c->scopestack_max = PL_scopestack_max;
434 c->savestack = PL_savestack;
435 c->savestack_ix = PL_savestack_ix;
436 c->savestack_max = PL_savestack_max;
437 c->retstack = PL_retstack;
438 c->retstack_ix = PL_retstack_ix;
439 c->retstack_max = PL_retstack_max;
440 c->curcop = PL_curcop;
441 c->top_env = PL_top_env;
442}
443
444/*
445 * allocate various perl stacks. This is an exact copy
446 * of perl.c:init_stacks, except that it uses less memory
447 * on the assumption that coroutines do not usually need
448 * a lot of stackspace.
449 */
450STATIC void
451coro_init_stacks (pTHX)
452{
453 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
454 PL_curstackinfo->si_type = PERLSI_MAIN;
455 PL_curstack = PL_curstackinfo->si_stack;
456 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
457
458 PL_stack_base = AvARRAY(PL_curstack);
459 PL_stack_sp = PL_stack_base;
460 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
461
462 New(50,PL_tmps_stack,96,SV*);
463 PL_tmps_floor = -1;
464 PL_tmps_ix = -1;
465 PL_tmps_max = 96;
466
467 New(54,PL_markstack,16,I32);
468 PL_markstack_ptr = PL_markstack;
469 PL_markstack_max = PL_markstack + 16;
470
471 SET_MARK_OFFSET;
472
473 New(54,PL_scopestack,16,I32);
474 PL_scopestack_ix = 0;
475 PL_scopestack_max = 16;
476
477 New(54,PL_savestack,96,ANY);
478 PL_savestack_ix = 0;
479 PL_savestack_max = 96;
480
481 New(54,PL_retstack,8,OP*);
482 PL_retstack_ix = 0;
483 PL_retstack_max = 8;
484}
485
486/*
487 * destroy the stacks, the callchain etc...
488 * still there is a memleak of 128 bytes...
489 */
490STATIC void
491destroy_stacks(pTHX)
492{
493 /* is this ugly, I ask? */
494 while (PL_scopestack_ix)
495 LEAVE;
496
497 /* sure it is, but more important: is it correct?? :/ */
498 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
499 FREETMPS;
500
501 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next;
503
504 while (PL_curstackinfo)
505 {
506 PERL_SI *p = PL_curstackinfo->si_prev;
507
508 {
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
515 dounwind(-1);
516
517 SvREFCNT_dec(PL_curstackinfo->si_stack);
518 Safefree(PL_curstackinfo->si_cxstack);
519 Safefree(PL_curstackinfo);
520 PL_curstackinfo = p;
521 }
522
523 Safefree(PL_tmps_stack);
524 Safefree(PL_markstack);
525 Safefree(PL_scopestack);
526 Safefree(PL_savestack);
527 Safefree(PL_retstack);
528}
529
530static void
531allocate_stack (Coro__State ctx, int alloc)
532{
533 coro_stack *stack;
534
535 New (0, stack, 1, coro_stack);
536
537 stack->refcnt = 1;
538 stack->usecnt = 1;
539 stack->gencnt = ctx->gencnt = 0;
540 if (alloc)
541 {
542#ifdef HAVE_MMAP
543 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
544 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
545 if (stack->sptr == (void *)-1)
546#endif
547 {
548 /*FIXME*//*D*//* reasonable stack size! */
549 stack->ssize = -4096 * sizeof (long);
550 New (0, stack->sptr, 4096, long);
551 }
552 }
553 else
554 stack->sptr = 0;
555
556 ctx->stack = stack;
557}
558
559static void
560deallocate_stack (Coro__State ctx)
561{
562 coro_stack *stack = ctx->stack;
563
564 ctx->stack = 0;
565
566 if (stack)
567 {
568 if (!--stack->refcnt)
569 {
570#ifdef HAVE_MMAP
571 if (stack->ssize > 0 && stack->sptr)
572 munmap (stack->sptr, stack->ssize);
573 else
574#else
575 Safefree (stack->sptr);
576#endif
577 Safefree (stack);
578 }
579 else if (ctx->gencnt == stack->gencnt)
580 --stack->usecnt;
581 }
582}
583
584static void
585setup_coro (void *arg)
586{
587 /*
588 * emulate part of the perl startup here.
589 */
590 dSP;
591 Coro__State ctx = (Coro__State)arg;
592 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
593
594 coro_init_stacks (aTHX);
595 /*PL_curcop = 0;*/
596 /*PL_in_eval = PL_in_eval;*/ /* inherit */
597 SvREFCNT_dec (GvAV (PL_defgv));
598 GvAV (PL_defgv) = ctx->args;
599
600 SPAGAIN;
601
602 if (ctx->stack)
603 {
604 ctx->cursp = 0;
605
606 PUSHMARK(SP);
607 PUTBACK;
608 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
609
610 if (SvTRUE (ERRSV))
611 croak (NULL);
612 else
613 croak ("FATAL: CCTXT coroutine returned!");
614 }
615 else
616 {
617 UNOP myop;
618
619 PL_op = (OP *)&myop;
620
621 Zero(&myop, 1, UNOP);
622 myop.op_next = Nullop;
623 myop.op_flags = OPf_WANT_VOID;
624
625 PUSHMARK(SP);
626 XPUSHs (sub_init);
627 /*
628 * the next line is slightly wrong, as PL_op->op_next
629 * is actually being executed so we skip the first op.
630 * that doesn't matter, though, since it is only
631 * pp_nextstate and we never return...
632 * ah yes, and I don't care anyways ;)
633 */
634 PUTBACK;
635 PL_op = pp_entersub();
636 SPAGAIN;
637
638 ENTER; /* necessary e.g. for dounwind */
639 }
640}
641
642static void
643continue_coro (void *arg)
644{
645 /*
646 * this is a _very_ stripped down perl interpreter ;)
647 */
648 Coro__State ctx = (Coro__State)arg;
649
650 /*FIXME*//* must set up top_env here */
651 ctx->cursp = 0;
652 PL_op = PL_op->op_next;
653 CALLRUNOPS(aTHX);
654
655 abort ();
656}
657
658STATIC void
659transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
660{
661 dSTACKLEVEL;
662 static struct coro *xnext;
663
664 if (prev != next)
665 {
666 xnext = next;
667
668 if (next->mainstack)
669 {
670 SAVE (prev, flags);
671 LOAD (next);
672
673 /* mark this state as in-use */
674 next->mainstack = 0;
675 next->tmps_ix = -2;
676
677 /* stacklevel changed? if yes, grab the stack for us! */
678 if (flags & TRANSFER_SAVE_CCTXT)
679 {
680 if (!prev->stack)
681 allocate_stack (prev, 0);
682 else if (prev->cursp != stacklevel
683 && prev->stack->usecnt > 1)
684 {
685 prev->gencnt = ++prev->stack->gencnt;
686 prev->stack->usecnt = 1;
687 }
688
689 /* has our stack been invalidated? */
690 if (next->stack && next->stack->gencnt != next->gencnt)
691 {
692 deallocate_stack (next);
693 allocate_stack (next, 1);
694 coro_create (&(next->stack->cctx),
695 continue_coro, (void *)next,
696 next->stack->sptr, labs (next->stack->ssize));
697 }
698
699 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
700 /* don't add any code here */
701 }
702
703 }
704 else if (next->tmps_ix == -2)
705 croak ("tried to transfer to running coroutine");
706 else
707 {
708 SAVE (prev, -1); /* first get rid of the old state */
709
710 if (flags & TRANSFER_SAVE_CCTXT)
711 {
712 if (!prev->stack)
713 allocate_stack (prev, 0);
714
715 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
716 {
717 setup_coro (next);
718
719 prev->stack->refcnt++;
720 prev->stack->usecnt++;
721 next->stack = prev->stack;
722 next->gencnt = prev->gencnt;
723 }
724 else
725 {
726 allocate_stack (next, 1);
727 coro_create (&(next->stack->cctx),
728 setup_coro, (void *)next,
729 next->stack->sptr, labs (next->stack->ssize));
730 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
731 /* don't add any code here */
732 }
733 }
734 else
735 setup_coro (next);
736 }
737 }
738
739 /*
740 * xnext is now either prev or next, depending on wether
741 * we switched the c stack or not. that's why i use a global
742 * variable, that should become thread-specific at one point.
743 */
744 xnext->cursp = stacklevel;
745}
746
747static struct coro *
748sv_to_coro (SV *arg, const char *funcname, const char *varname)
749{
750 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
751 {
752 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
753
754 if (!he)
755 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
756
757 arg = HeVAL(he);
758 }
759
760 /* must also be changed inside Coro::Cont::yield */
761 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
762 return (struct coro *) SvIV((SV*)SvRV(arg));
763
764 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
765 /*NORETURN*/
766}
767
768static void
769api_transfer(pTHX_ SV *prev, SV *next, int flags)
770{
771 transfer(aTHX_
772 sv_to_coro (prev, "Coro::transfer", "prev"),
773 sv_to_coro (next, "Coro::transfer", "next"),
774 flags);
775}
776 290
777/** Coro ********************************************************************/ 291/** Coro ********************************************************************/
778 292
779#define PRIO_MAX 3 293#define PRIO_MAX 3
780#define PRIO_HIGH 1 294#define PRIO_HIGH 1
… …
782#define PRIO_LOW -1 296#define PRIO_LOW -1
783#define PRIO_IDLE -3 297#define PRIO_IDLE -3
784#define PRIO_MIN -4 298#define PRIO_MIN -4
785 299
786/* for Coro.pm */ 300/* for Coro.pm */
787static GV *coro_current, *coro_idle; 301static SV *coro_current;
302static SV *coro_readyhook;
788static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
789static int coro_nready; 304static struct coro *coro_first;
305#define coro_nready coroapi.nready
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339static AV *
340coro_clone_padlist (pTHX_ CV *cv)
341{
342 AV *padlist = CvPADLIST (cv);
343 AV *newpadlist, *newpad;
344
345 newpadlist = newAV ();
346 AvREAL_off (newpadlist);
347#if PERL_VERSION_ATLEAST (5,10,0)
348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
349#else
350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif
352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
353 --AvFILLp (padlist);
354
355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
356 av_store (newpadlist, 1, (SV *)newpad);
357
358 return newpadlist;
359}
790 360
791static void 361static void
792coro_enq (SV *sv) 362free_padlist (pTHX_ AV *padlist)
793{ 363{
794 if (SvROK (sv)) 364 /* may be during global destruction */
365 if (SvREFCNT (padlist))
795 { 366 {
796 SV *hv = SvRV (sv); 367 I32 i = AvFILLp (padlist);
797 if (SvTYPE (hv) == SVt_PVHV) 368 while (i >= 0)
798 { 369 {
799 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 370 SV **svp = av_fetch (padlist, i--, FALSE);
800 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 371 if (svp)
372 {
373 SV *sv;
374 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
375 SvREFCNT_dec (sv);
801 376
802 prio = prio > PRIO_MAX ? PRIO_MAX 377 SvREFCNT_dec (*svp);
803 : prio < PRIO_MIN ? PRIO_MIN 378 }
804 : prio;
805
806 av_push (coro_ready [prio - PRIO_MIN], sv);
807 coro_nready++;
808
809 return;
810 } 379 }
380
381 SvREFCNT_dec ((SV*)padlist);
382 }
383}
384
385static int
386coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
387{
388 AV *padlist;
389 AV *av = (AV *)mg->mg_obj;
390
391 /* casting is fun. */
392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
393 free_padlist (aTHX_ padlist);
394
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396
397 return 0;
398}
399
400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
402
403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418INLINE struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
443
444/* the next two functions merely cache the padlists */
445static void
446get_padlist (pTHX_ CV *cv)
447{
448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
450
451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
453 else
454 {
455#if CORO_PREFER_PERL_FUNCTIONS
456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
458 CV *cp = Perl_cv_clone (cv);
459 CvPADLIST (cv) = CvPADLIST (cp);
460 CvPADLIST (cp) = 0;
461 SvREFCNT_dec (cp);
462#else
463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
464#endif
811 } 465 }
466}
812 467
813 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 468static void
469put_padlist (pTHX_ CV *cv)
470{
471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
473
474 if (expect_false (!mg))
475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
476
477 av = (AV *)mg->mg_obj;
478
479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
480 av_extend (av, AvMAX (av) + 1);
481
482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
483}
484
485/** load & save, init *******************************************************/
486
487static void
488load_perl (pTHX_ Coro__State c)
489{
490 perl_slots *slot = c->slot;
491 c->slot = 0;
492
493 PL_mainstack = c->mainstack;
494
495 GvSV (PL_defgv) = slot->defsv;
496 GvAV (PL_defgv) = slot->defav;
497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
500 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h"
502 #undef VAR
503
504 {
505 dSP;
506
507 CV *cv;
508
509 /* now do the ugly restore mess */
510 while (expect_true (cv = (CV *)POPs))
511 {
512 put_padlist (aTHX_ cv); /* mark this padlist as available */
513 CvDEPTH (cv) = PTR2IV (POPs);
514 CvPADLIST (cv) = (AV *)POPs;
515 }
516
517 PUTBACK;
518 }
519}
520
521static void
522save_perl (pTHX_ Coro__State c)
523{
524 {
525 dSP;
526 I32 cxix = cxstack_ix;
527 PERL_CONTEXT *ccstk = cxstack;
528 PERL_SI *top_si = PL_curstackinfo;
529
530 /*
531 * the worst thing you can imagine happens first - we have to save
532 * (and reinitialize) all cv's in the whole callchain :(
533 */
534
535 XPUSHs (Nullsv);
536 /* this loop was inspired by pp_caller */
537 for (;;)
538 {
539 while (expect_true (cxix >= 0))
540 {
541 PERL_CONTEXT *cx = &ccstk[cxix--];
542
543 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
544 {
545 CV *cv = cx->blk_sub.cv;
546
547 if (expect_true (CvDEPTH (cv)))
548 {
549 EXTEND (SP, 3);
550 PUSHs ((SV *)CvPADLIST (cv));
551 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
552 PUSHs ((SV *)cv);
553
554 CvDEPTH (cv) = 0;
555 get_padlist (aTHX_ cv);
556 }
557 }
558 }
559
560 if (expect_true (top_si->si_type == PERLSI_MAIN))
561 break;
562
563 top_si = top_si->si_prev;
564 ccstk = top_si->si_cxstack;
565 cxix = top_si->si_cxix;
566 }
567
568 PUTBACK;
569 }
570
571 /* allocate some space on the context stack for our purposes */
572 /* we manually unroll here, as usually 2 slots is enough */
573 if (SLOT_COUNT >= 1) CXINC;
574 if (SLOT_COUNT >= 2) CXINC;
575 if (SLOT_COUNT >= 3) CXINC;
576 {
577 int i;
578 for (i = 3; i < SLOT_COUNT; ++i)
579 CXINC;
580 }
581 cxstack_ix -= SLOT_COUNT; /* undo allocation */
582
583 c->mainstack = PL_mainstack;
584
585 {
586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
587
588 slot->defav = GvAV (PL_defgv);
589 slot->defsv = DEFSV;
590 slot->errsv = ERRSV;
591 slot->irsgv = GvSV (irsgv);
592
593 #define VAR(name,type) slot->name = PL_ ## name;
594 # include "state.h"
595 #undef VAR
596 }
597}
598
599/*
600 * allocate various perl stacks. This is an exact copy
601 * of perl.c:init_stacks, except that it uses less memory
602 * on the (sometimes correct) assumption that coroutines do
603 * not usually need a lot of stackspace.
604 */
605#if CORO_PREFER_PERL_FUNCTIONS
606# define coro_init_stacks init_stacks
607#else
608static void
609coro_init_stacks (pTHX)
610{
611 PL_curstackinfo = new_stackinfo(32, 8);
612 PL_curstackinfo->si_type = PERLSI_MAIN;
613 PL_curstack = PL_curstackinfo->si_stack;
614 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
615
616 PL_stack_base = AvARRAY(PL_curstack);
617 PL_stack_sp = PL_stack_base;
618 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
619
620 New(50,PL_tmps_stack,32,SV*);
621 PL_tmps_floor = -1;
622 PL_tmps_ix = -1;
623 PL_tmps_max = 32;
624
625 New(54,PL_markstack,16,I32);
626 PL_markstack_ptr = PL_markstack;
627 PL_markstack_max = PL_markstack + 16;
628
629#ifdef SET_MARK_OFFSET
630 SET_MARK_OFFSET;
631#endif
632
633 New(54,PL_scopestack,8,I32);
634 PL_scopestack_ix = 0;
635 PL_scopestack_max = 8;
636
637 New(54,PL_savestack,24,ANY);
638 PL_savestack_ix = 0;
639 PL_savestack_max = 24;
640
641#if !PERL_VERSION_ATLEAST (5,10,0)
642 New(54,PL_retstack,4,OP*);
643 PL_retstack_ix = 0;
644 PL_retstack_max = 4;
645#endif
646}
647#endif
648
649/*
650 * destroy the stacks, the callchain etc...
651 */
652static void
653coro_destruct_stacks (pTHX)
654{
655 while (PL_curstackinfo->si_next)
656 PL_curstackinfo = PL_curstackinfo->si_next;
657
658 while (PL_curstackinfo)
659 {
660 PERL_SI *p = PL_curstackinfo->si_prev;
661
662 if (!IN_DESTRUCT)
663 SvREFCNT_dec (PL_curstackinfo->si_stack);
664
665 Safefree (PL_curstackinfo->si_cxstack);
666 Safefree (PL_curstackinfo);
667 PL_curstackinfo = p;
668 }
669
670 Safefree (PL_tmps_stack);
671 Safefree (PL_markstack);
672 Safefree (PL_scopestack);
673 Safefree (PL_savestack);
674#if !PERL_VERSION_ATLEAST (5,10,0)
675 Safefree (PL_retstack);
676#endif
677}
678
679static size_t
680coro_rss (pTHX_ struct coro *coro)
681{
682 size_t rss = sizeof (*coro);
683
684 if (coro->mainstack)
685 {
686 perl_slots tmp_slot;
687 perl_slots *slot;
688
689 if (coro->flags & CF_RUNNING)
690 {
691 slot = &tmp_slot;
692
693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR
696 }
697 else
698 slot = coro->slot;
699
700 if (slot)
701 {
702 rss += sizeof (slot->curstackinfo);
703 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
705 rss += slot->tmps_max * sizeof (SV *);
706 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
707 rss += slot->scopestack_max * sizeof (I32);
708 rss += slot->savestack_max * sizeof (ANY);
709
710#if !PERL_VERSION_ATLEAST (5,10,0)
711 rss += slot->retstack_max * sizeof (OP *);
712#endif
713 }
714 }
715
716 return rss;
717}
718
719/** set stacklevel support **************************************************/
720
721/* we sometimes need to create the effect of pp_slf calling us */
722#define SLF_HEAD (void)0
723/* we sometimes need to create the effect of leaving via pp_slf */
724#define SLF_TAIL slf_tail (aTHX)
725
726INLINE void
727slf_tail (pTHX)
728{
729 dSP;
730 SV **bot = SP;
731
732 int gimme = GIMME_V;
733
734 /* make sure we put something on the stack in scalar context */
735 if (gimme == G_SCALAR)
736 {
737 if (sp == bot)
738 XPUSHs (&PL_sv_undef);
739
740 SP = bot + 1;
741 }
742
743 PUTBACK;
744}
745
746/** coroutine stack handling ************************************************/
747
748static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
749static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
750static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
751
752/* apparently < 5.8.8 */
753#ifndef MgPV_nolen_const
754#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
755 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
756 (const char*)(mg)->mg_ptr)
757#endif
758
759/*
760 * This overrides the default magic get method of %SIG elements.
761 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
762 * and instead of tryign to save and restore the hash elements, we just provide
763 * readback here.
764 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
765 * not expecting this to actually change the hook. This is a potential problem
766 * when a schedule happens then, but we ignore this.
767 */
768static int
769coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
770{
771 const char *s = MgPV_nolen_const (mg);
772
773 if (*s == '_')
774 {
775 SV **svp = 0;
776
777 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
778 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
779
780 if (svp)
781 {
782 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = 0;
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
812}
813
814static int
815coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
816{
817 const char *s = MgPV_nolen_const (mg);
818
819 if (*s == '_')
820 {
821 SV **svp = 0;
822
823 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
824 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
825
826 if (svp)
827 {
828 SV *old = *svp;
829 *svp = newSVsv (sv);
830 SvREFCNT_dec (old);
831 return 0;
832 }
833 }
834
835 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
836}
837
838static void
839coro_setup (pTHX_ struct coro *coro)
840{
841 /*
842 * emulate part of the perl startup here.
843 */
844 coro_init_stacks (aTHX);
845
846 PL_runops = RUNOPS_DEFAULT;
847 PL_curcop = &PL_compiling;
848 PL_in_eval = EVAL_NULL;
849 PL_comppad = 0;
850 PL_curpm = 0;
851 PL_curpad = 0;
852 PL_localizing = 0;
853 PL_dirty = 0;
854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862
863 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
867 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
869
870 {
871 dSP;
872 UNOP myop;
873
874 Zero (&myop, 1, UNOP);
875 myop.op_next = Nullop;
876 myop.op_flags = OPf_WANT_VOID;
877
878 PUSHMARK (SP);
879 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
880 PUTBACK;
881 PL_op = (OP *)&myop;
882 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
883 SPAGAIN;
884 }
885
886 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in set_stacklevel, called from pp_set_stacklevel,
888 * so we have to emulate entering pp_set_stacklevel here.
889 */
890 SLF_HEAD;
891}
892
893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
914 SvREFCNT_dec (GvAV (PL_defgv));
915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (coro->throw);
925
926 coro_destruct_stacks (aTHX);
927}
928
929INLINE void
930free_coro_mortal (pTHX)
931{
932 if (expect_true (coro_mortal))
933 {
934 SvREFCNT_dec (coro_mortal);
935 coro_mortal = 0;
936 }
937}
938
939static int
940runops_trace (pTHX)
941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 {
949 PERL_ASYNC_CHECK ();
950
951 if (cctx->flags & CC_TRACE_ALL)
952 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
954 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top;
957 AV *av = newAV (); /* return values */
958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
997 {
998 SV **cb;
999
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1001 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
1032 }
1033
1034 if (cctx->flags & CC_TRACE_LINE)
1035 {
1036 dSP;
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054 }
1055 }
1056 }
1057 }
1058
1059 TAINT_NOT;
1060 return 0;
1061}
1062
1063static void
1064prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1065{
1066 ta->prev = (struct coro *)cctx;
1067 ta->next = 0;
1068}
1069
1070/* inject a fake call to Coro::State::_cctx_init into the execution */
1071/* _cctx_init should be careful, as it could be called at almost any time */
1072/* during execution of a perl program */
1073/* also initialises PL_top_env */
1074static void NOINLINE
1075cctx_prepare (pTHX_ coro_cctx *cctx)
1076{
1077 dSP;
1078 UNOP myop;
1079
1080 PL_top_env = &PL_start_env;
1081
1082 if (cctx->flags & CC_TRACE)
1083 PL_runops = runops_trace;
1084
1085 Zero (&myop, 1, UNOP);
1086 myop.op_next = PL_op;
1087 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1088
1089 PUSHMARK (SP);
1090 EXTEND (SP, 2);
1091 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1092 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1093 PUTBACK;
1094 PL_op = (OP *)&myop;
1095 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1096 SPAGAIN;
1097}
1098
1099/* the tail of transfer: execute stuff we can only do after a transfer */
1100INLINE void
1101transfer_tail (pTHX)
1102{
1103 struct coro *next = (struct coro *)transfer_next;
1104 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1105 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1106
1107 free_coro_mortal (aTHX);
1108 UNLOCK;
1109
1110 if (expect_false (next->throw))
1111 {
1112 SV *exception = sv_2mortal (next->throw);
1113
1114 next->throw = 0;
1115 sv_setsv (ERRSV, exception);
1116 croak (0);
1117 }
1118}
1119
1120/*
1121 * this is a _very_ stripped down perl interpreter ;)
1122 */
1123static void
1124cctx_run (void *arg)
1125{
1126#ifdef USE_ITHREADS
1127# if CORO_PTHREAD
1128 PERL_SET_CONTEXT (coro_thx);
1129# endif
1130#endif
1131 {
1132 dTHX;
1133
1134 /* we are the alternative tail to pp_set_stacklevel */
1135 /* so do the same things here */
1136 SLF_TAIL;
1137
1138 /* we now skip the op that did lead to transfer() */
1139 PL_op = PL_op->op_next;
1140
1141 /* inject a fake subroutine call to cctx_init */
1142 cctx_prepare (aTHX_ (coro_cctx *)arg);
1143
1144 /* cctx_run is the alternative tail of transfer() */
1145 transfer_tail (aTHX);
1146
1147 /* somebody or something will hit me for both perl_run and PL_restartop */
1148 PL_restartop = PL_op;
1149 perl_run (PL_curinterp);
1150
1151 /*
1152 * If perl-run returns we assume exit() was being called or the coro
1153 * fell off the end, which seems to be the only valid (non-bug)
1154 * reason for perl_run to return. We try to exit by jumping to the
1155 * bootstrap-time "top" top_env, as we cannot restore the "main"
1156 * coroutine as Coro has no such concept
1157 */
1158 PL_top_env = main_top_env;
1159 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1160 }
1161}
1162
1163static coro_cctx *
1164cctx_new ()
1165{
1166 coro_cctx *cctx;
1167
1168 ++cctx_count;
1169 New (0, cctx, 1, coro_cctx);
1170
1171 cctx->gen = cctx_gen;
1172 cctx->flags = 0;
1173 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1174
1175 return cctx;
1176}
1177
1178/* create a new cctx only suitable as source */
1179static coro_cctx *
1180cctx_new_empty ()
1181{
1182 coro_cctx *cctx = cctx_new ();
1183
1184 cctx->sptr = 0;
1185 coro_create (&cctx->cctx, 0, 0, 0, 0);
1186
1187 return cctx;
1188}
1189
1190/* create a new cctx suitable as destination/running a perl interpreter */
1191static coro_cctx *
1192cctx_new_run ()
1193{
1194 coro_cctx *cctx = cctx_new ();
1195 void *stack_start;
1196 size_t stack_size;
1197
1198#if HAVE_MMAP
1199 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1200 /* mmap supposedly does allocate-on-write for us */
1201 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1202
1203 if (cctx->sptr != (void *)-1)
1204 {
1205 #if CORO_STACKGUARD
1206 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1207 #endif
1208 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1209 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1210 cctx->flags |= CC_MAPPED;
1211 }
1212 else
1213#endif
1214 {
1215 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1216 New (0, cctx->sptr, cctx_stacksize, long);
1217
1218 if (!cctx->sptr)
1219 {
1220 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1221 _exit (EXIT_FAILURE);
1222 }
1223
1224 stack_start = cctx->sptr;
1225 stack_size = cctx->ssize;
1226 }
1227
1228 #if CORO_USE_VALGRIND
1229 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1230 #endif
1231
1232 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1233
1234 return cctx;
1235}
1236
1237static void
1238cctx_destroy (coro_cctx *cctx)
1239{
1240 if (!cctx)
1241 return;
1242
1243 --cctx_count;
1244 coro_destroy (&cctx->cctx);
1245
1246 /* coro_transfer creates new, empty cctx's */
1247 if (cctx->sptr)
1248 {
1249 #if CORO_USE_VALGRIND
1250 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1251 #endif
1252
1253#if HAVE_MMAP
1254 if (cctx->flags & CC_MAPPED)
1255 munmap (cctx->sptr, cctx->ssize);
1256 else
1257#endif
1258 Safefree (cctx->sptr);
1259 }
1260
1261 Safefree (cctx);
1262}
1263
1264/* wether this cctx should be destructed */
1265#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1266
1267static coro_cctx *
1268cctx_get (pTHX)
1269{
1270 while (expect_true (cctx_first))
1271 {
1272 coro_cctx *cctx = cctx_first;
1273 cctx_first = cctx->next;
1274 --cctx_idle;
1275
1276 if (expect_true (!CCTX_EXPIRED (cctx)))
1277 return cctx;
1278
1279 cctx_destroy (cctx);
1280 }
1281
1282 return cctx_new_run ();
1283}
1284
1285static void
1286cctx_put (coro_cctx *cctx)
1287{
1288 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1289
1290 /* free another cctx if overlimit */
1291 if (expect_false (cctx_idle >= cctx_max_idle))
1292 {
1293 coro_cctx *first = cctx_first;
1294 cctx_first = first->next;
1295 --cctx_idle;
1296
1297 cctx_destroy (first);
1298 }
1299
1300 ++cctx_idle;
1301 cctx->next = cctx_first;
1302 cctx_first = cctx;
1303}
1304
1305/** coroutine switching *****************************************************/
1306
1307static void
1308transfer_check (pTHX_ struct coro *prev, struct coro *next)
1309{
1310 if (expect_true (prev != next))
1311 {
1312 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1313 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1314
1315 if (expect_false (next->flags & CF_RUNNING))
1316 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1317
1318 if (expect_false (next->flags & CF_DESTROYED))
1319 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1320
1321#if !PERL_VERSION_ATLEAST (5,10,0)
1322 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1323 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1324#endif
1325 }
1326}
1327
1328/* always use the TRANSFER macro */
1329static void NOINLINE
1330transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1331{
1332 dSTACKLEVEL;
1333
1334 /* sometimes transfer is only called to set idle_sp */
1335 if (expect_false (!next))
1336 {
1337 ((coro_cctx *)prev)->idle_sp = stacklevel;
1338 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1339 }
1340 else if (expect_true (prev != next))
1341 {
1342 coro_cctx *prev__cctx;
1343
1344 if (expect_false (prev->flags & CF_NEW))
1345 {
1346 /* create a new empty/source context */
1347 prev->cctx = cctx_new_empty ();
1348 prev->flags &= ~CF_NEW;
1349 prev->flags |= CF_RUNNING;
1350 }
1351
1352 prev->flags &= ~CF_RUNNING;
1353 next->flags |= CF_RUNNING;
1354
1355 LOCK;
1356
1357 /* first get rid of the old state */
1358 save_perl (aTHX_ prev);
1359
1360 if (expect_false (next->flags & CF_NEW))
1361 {
1362 /* need to start coroutine */
1363 next->flags &= ~CF_NEW;
1364 /* setup coroutine call */
1365 coro_setup (aTHX_ next);
1366 }
1367 else
1368 load_perl (aTHX_ next);
1369
1370 prev__cctx = prev->cctx;
1371
1372 /* possibly untie and reuse the cctx */
1373 if (expect_true (
1374 prev__cctx->idle_sp == stacklevel
1375 && !(prev__cctx->flags & CC_TRACE)
1376 && !force_cctx
1377 ))
1378 {
1379 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1380 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1381
1382 prev->cctx = 0;
1383
1384 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1385 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1386 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1387 if (!next->cctx)
1388 next->cctx = cctx_get (aTHX);
1389
1390 cctx_put (prev__cctx);
1391 }
1392
1393 ++next->usecount;
1394
1395 if (expect_true (!next->cctx))
1396 next->cctx = cctx_get (aTHX);
1397
1398 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1399 transfer_next = next;
1400
1401 if (expect_false (prev__cctx != next->cctx))
1402 {
1403 prev__cctx->top_env = PL_top_env;
1404 PL_top_env = next->cctx->top_env;
1405 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1406 }
1407
1408 transfer_tail (aTHX);
1409 }
1410}
1411
1412#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1413#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1414
1415/** high level stuff ********************************************************/
1416
1417static int
1418coro_state_destroy (pTHX_ struct coro *coro)
1419{
1420 if (coro->flags & CF_DESTROYED)
1421 return 0;
1422
1423 coro->flags |= CF_DESTROYED;
1424
1425 if (coro->flags & CF_READY)
1426 {
1427 /* reduce nready, as destroying a ready coro effectively unreadies it */
1428 /* alternative: look through all ready queues and remove the coro */
1429 LOCK;
1430 --coro_nready;
1431 UNLOCK;
1432 }
1433 else
1434 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1435
1436 if (coro->mainstack && coro->mainstack != main_mainstack)
1437 {
1438 struct coro temp;
1439
1440 if (coro->flags & CF_RUNNING)
1441 croak ("FATAL: tried to destroy currently running coroutine");
1442
1443 save_perl (aTHX_ &temp);
1444 load_perl (aTHX_ coro);
1445
1446 coro_destruct (aTHX_ coro);
1447
1448 load_perl (aTHX_ &temp);
1449
1450 coro->slot = 0;
1451 }
1452
1453 cctx_destroy (coro->cctx);
1454 SvREFCNT_dec (coro->args);
1455
1456 if (coro->next) coro->next->prev = coro->prev;
1457 if (coro->prev) coro->prev->next = coro->next;
1458 if (coro == coro_first) coro_first = coro->next;
1459
1460 return 1;
1461}
1462
1463static int
1464coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1465{
1466 struct coro *coro = (struct coro *)mg->mg_ptr;
1467 mg->mg_ptr = 0;
1468
1469 coro->hv = 0;
1470
1471 if (--coro->refcnt < 0)
1472 {
1473 coro_state_destroy (aTHX_ coro);
1474 Safefree (coro);
1475 }
1476
1477 return 0;
1478}
1479
1480static int
1481coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1482{
1483 struct coro *coro = (struct coro *)mg->mg_ptr;
1484
1485 ++coro->refcnt;
1486
1487 return 0;
1488}
1489
1490static MGVTBL coro_state_vtbl = {
1491 0, 0, 0, 0,
1492 coro_state_free,
1493 0,
1494#ifdef MGf_DUP
1495 coro_state_dup,
1496#else
1497# define MGf_DUP 0
1498#endif
1499};
1500
1501static void
1502prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1503{
1504 ta->prev = SvSTATE (prev_sv);
1505 ta->next = SvSTATE (next_sv);
1506 TRANSFER_CHECK (*ta);
1507}
1508
1509static void
1510api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1511{
1512 struct transfer_args ta;
1513
1514 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1515 TRANSFER (ta, 1);
1516}
1517
1518/** Coro ********************************************************************/
1519
1520static void
1521coro_enq (pTHX_ SV *coro_sv)
1522{
1523 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
814} 1524}
815 1525
816static SV * 1526static SV *
817coro_deq (int min_prio) 1527coro_deq (pTHX)
818{ 1528{
819 int prio = PRIO_MAX - PRIO_MIN; 1529 int prio;
820 1530
821 min_prio -= PRIO_MIN;
822 if (min_prio < 0)
823 min_prio = 0;
824
825 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1531 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
826 if (av_len (coro_ready[prio]) >= 0) 1532 if (AvFILLp (coro_ready [prio]) >= 0)
827 {
828 coro_nready--;
829 return av_shift (coro_ready[prio]); 1533 return av_shift (coro_ready [prio]);
830 }
831 1534
832 return 0; 1535 return 0;
833} 1536}
834 1537
1538static int
1539api_ready (pTHX_ SV *coro_sv)
1540{
1541 struct coro *coro;
1542 SV *sv_hook;
1543 void (*xs_hook)(void);
1544
1545 if (SvROK (coro_sv))
1546 coro_sv = SvRV (coro_sv);
1547
1548 coro = SvSTATE (coro_sv);
1549
1550 if (coro->flags & CF_READY)
1551 return 0;
1552
1553 coro->flags |= CF_READY;
1554
1555 LOCK;
1556
1557 sv_hook = coro_nready ? 0 : coro_readyhook;
1558 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1559
1560 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1561 ++coro_nready;
1562
1563 UNLOCK;
1564
1565 if (sv_hook)
1566 {
1567 dSP;
1568
1569 ENTER;
1570 SAVETMPS;
1571
1572 PUSHMARK (SP);
1573 PUTBACK;
1574 call_sv (sv_hook, G_DISCARD);
1575 SPAGAIN;
1576
1577 FREETMPS;
1578 LEAVE;
1579 }
1580
1581 if (xs_hook)
1582 xs_hook ();
1583
1584 return 1;
1585}
1586
1587static int
1588api_is_ready (pTHX_ SV *coro_sv)
1589{
1590 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1591}
1592
1593INLINE void
1594prepare_schedule (pTHX_ struct transfer_args *ta)
1595{
1596 SV *prev_sv, *next_sv;
1597
1598 for (;;)
1599 {
1600 LOCK;
1601 next_sv = coro_deq (aTHX);
1602
1603 /* nothing to schedule: call the idle handler */
1604 if (expect_false (!next_sv))
1605 {
1606 dSP;
1607 UNLOCK;
1608
1609 ENTER;
1610 SAVETMPS;
1611
1612 PUSHMARK (SP);
1613 PUTBACK;
1614 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1615 SPAGAIN;
1616
1617 FREETMPS;
1618 LEAVE;
1619 continue;
1620 }
1621
1622 ta->next = SvSTATE (next_sv);
1623
1624 /* cannot transfer to destroyed coros, skip and look for next */
1625 if (expect_false (ta->next->flags & CF_DESTROYED))
1626 {
1627 UNLOCK;
1628 SvREFCNT_dec (next_sv);
1629 /* coro_nready has already been taken care of by destroy */
1630 continue;
1631 }
1632
1633 --coro_nready;
1634 UNLOCK;
1635 break;
1636 }
1637
1638 /* free this only after the transfer */
1639 prev_sv = SvRV (coro_current);
1640 ta->prev = SvSTATE (prev_sv);
1641 TRANSFER_CHECK (*ta);
1642 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1643 ta->next->flags &= ~CF_READY;
1644 SvRV_set (coro_current, next_sv);
1645
1646 LOCK;
1647 free_coro_mortal (aTHX);
1648 coro_mortal = prev_sv;
1649 UNLOCK;
1650}
1651
1652INLINE void
1653prepare_cede (pTHX_ struct transfer_args *ta)
1654{
1655 api_ready (aTHX_ coro_current);
1656 prepare_schedule (aTHX_ ta);
1657}
1658
835static void 1659static void
836api_ready (SV *coro) 1660prepare_cede_notself (pTHX_ struct transfer_args *ta)
837{ 1661{
838 coro_enq (SvREFCNT_inc (coro)); 1662 SV *prev = SvRV (coro_current);
1663
1664 if (coro_nready)
1665 {
1666 prepare_schedule (aTHX_ ta);
1667 api_ready (aTHX_ prev);
1668 }
1669 else
1670 ta->prev = ta->next = SvSTATE (prev);
839} 1671}
840 1672
841static void 1673static void
842api_schedule (int cede) 1674api_schedule (pTHX)
843{ 1675{
844 SV *prev, *next; 1676 struct transfer_args ta;
845 1677
846 prev = GvSV (coro_current); 1678 prepare_schedule (aTHX_ &ta);
1679 TRANSFER (ta, 1);
1680}
847 1681
848 if (cede) 1682static int
849 coro_enq (SvREFCNT_inc (prev)); 1683api_cede (pTHX)
1684{
1685 struct transfer_args ta;
850 1686
851 next = coro_deq (PRIO_MIN); 1687 prepare_cede (aTHX_ &ta);
852 1688
1689 if (expect_true (ta.prev != ta.next))
1690 {
1691 TRANSFER (ta, 1);
1692 return 1;
1693 }
1694 else
1695 return 0;
1696}
1697
1698static int
1699api_cede_notself (pTHX)
1700{
1701 if (coro_nready)
1702 {
1703 struct transfer_args ta;
1704
1705 prepare_cede_notself (aTHX_ &ta);
1706 TRANSFER (ta, 1);
1707 return 1;
1708 }
1709 else
1710 return 0;
1711}
1712
1713static void
1714api_trace (pTHX_ SV *coro_sv, int flags)
1715{
1716 struct coro *coro = SvSTATE (coro_sv);
1717
1718 if (flags & CC_TRACE)
1719 {
1720 if (!coro->cctx)
1721 coro->cctx = cctx_new_run ();
1722 else if (!(coro->cctx->flags & CC_TRACE))
1723 croak ("cannot enable tracing on coroutine with custom stack");
1724
1725 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1726 }
1727 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1728 {
1729 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1730
1731 if (coro->flags & CF_RUNNING)
1732 PL_runops = RUNOPS_DEFAULT;
1733 else
1734 coro->slot->runops = RUNOPS_DEFAULT;
1735 }
1736}
1737
1738#if 0
1739static int
1740coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1741{
1742 AV *padlist;
1743 AV *av = (AV *)mg->mg_obj;
1744
1745 abort ();
1746
1747 return 0;
1748}
1749
1750static MGVTBL coro_gensub_vtbl = {
1751 0, 0, 0, 0,
1752 coro_gensub_free
1753};
1754#endif
1755
1756/*****************************************************************************/
1757/* PerlIO::cede */
1758
1759typedef struct
1760{
1761 PerlIOBuf base;
1762 NV next, every;
1763} PerlIOCede;
1764
1765static IV
1766PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1767{
1768 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1769
1770 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1771 self->next = nvtime () + self->every;
1772
1773 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1774}
1775
1776static SV *
1777PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1778{
1779 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1780
1781 return newSVnv (self->every);
1782}
1783
1784static IV
1785PerlIOCede_flush (pTHX_ PerlIO *f)
1786{
1787 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1788 double now = nvtime ();
1789
1790 if (now >= self->next)
1791 {
1792 api_cede (aTHX);
1793 self->next = now + self->every;
1794 }
1795
1796 return PerlIOBuf_flush (aTHX_ f);
1797}
1798
1799static PerlIO_funcs PerlIO_cede =
1800{
1801 sizeof(PerlIO_funcs),
1802 "cede",
1803 sizeof(PerlIOCede),
1804 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1805 PerlIOCede_pushed,
1806 PerlIOBuf_popped,
1807 PerlIOBuf_open,
1808 PerlIOBase_binmode,
1809 PerlIOCede_getarg,
1810 PerlIOBase_fileno,
1811 PerlIOBuf_dup,
1812 PerlIOBuf_read,
1813 PerlIOBuf_unread,
1814 PerlIOBuf_write,
1815 PerlIOBuf_seek,
1816 PerlIOBuf_tell,
1817 PerlIOBuf_close,
1818 PerlIOCede_flush,
1819 PerlIOBuf_fill,
1820 PerlIOBase_eof,
1821 PerlIOBase_error,
1822 PerlIOBase_clearerr,
1823 PerlIOBase_setlinebuf,
1824 PerlIOBuf_get_base,
1825 PerlIOBuf_bufsiz,
1826 PerlIOBuf_get_ptr,
1827 PerlIOBuf_get_cnt,
1828 PerlIOBuf_set_ptrcnt,
1829};
1830
1831/*****************************************************************************/
1832
1833static const CV *slf_cv; /* for quick consistency check */
1834
1835static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1836static SV *slf_arg0;
1837static SV *slf_arg1;
1838
1839/* this restores the stack in the case we patched the entersub, to */
1840/* recreate the stack frame as perl will on following calls */
1841/* since entersub cleared the stack */
1842static OP *
1843pp_restore (pTHX)
1844{
1845 dSP;
1846
1847 PUSHMARK (SP);
1848
1849 EXTEND (SP, 3);
1850 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1851 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1852 PUSHs ((SV *)CvGV (slf_cv));
1853
1854 RETURNOP (slf_restore.op_first);
1855}
1856
1857#define OPpENTERSUB_SLF 15 /* the part of op_private entersub hopefully doesn't use */
1858
1859enum {
1860 CORO_SLF_CUSTOM = 0,
1861 CORO_SLF_SET_STACKLEVEL = 1,
1862 CORO_SLF_TRANSFER = 2
1863};
1864
1865/* declare prototype */
1866XS(XS_Coro__State__set_stacklevel);
1867
1868/*
1869 * these not obviously related functions are all rolled into one
1870 * function to increase chances that they all will call transfer with the same
1871 * stack offset
1872 * SLF stands for "schedule-like-function".
1873 */
1874static OP *
1875pp_slf (pTHX)
1876{
1877 dSP;
1878 struct transfer_args ta;
1879 SV **arg = PL_stack_base + TOPMARK + 1;
1880 int items = SP - arg; /* args without function object */
1881 int ix = PL_op->op_private & OPpENTERSUB_SLF;
1882 struct CoroSLF *slf = 0;
1883 SV *gv = *sp;
1884
1885 /* do a quick consistency check on the "function" object, and if it isn't */
1886 /* for us, divert to the real entersub */
1887 if (SvTYPE (gv) != SVt_PVGV || CvXSUB (GvCV (gv)) != XS_Coro__State__set_stacklevel)
1888 return PL_ppaddr[OP_ENTERSUB](aTHX);
1889
1890 /* pop args */
1891 SP = PL_stack_base + POPMARK;
1892
1893 if (!(PL_op->op_flags & OPf_STACKED))
1894 {
1895 /* ampersand-form of call, use @_ instead of stack */
1896 AV *av = GvAV (PL_defgv);
1897 arg = AvARRAY (av);
1898 items = AvFILLp (av) + 1;
1899 }
1900
1901 PUTBACK;
1902
853 if (!next) 1903 if (!ix)
854 next = SvREFCNT_inc (GvSV (coro_idle)); 1904 {
1905 slf = (struct CoroSLF *)CvXSUBANY (GvCV (gv)).any_ptr;
1906 ix = slf->prepare (aTHX_ arg, items);
1907 }
855 1908
856 GvSV (coro_current) = SvREFCNT_inc (next); 1909 switch (ix)
857 transfer (aTHX_ 1910 {
858 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 1911 case CORO_SLF_SET_STACKLEVEL:
859 sv_to_coro (next, "Coro::schedule", "next coroutine"), 1912 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (arg [0]));
860 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1913 break;
861 SvREFCNT_dec (next);
862 SvREFCNT_dec (prev);
863}
864 1914
1915 case CORO_SLF_TRANSFER:
1916 if (items != 2)
1917 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d.", items);
1918
1919 prepare_transfer (aTHX_ &ta, arg [0], arg [1]);
1920 break;
1921
1922 case CORO_SLF_SCHEDULE:
1923 prepare_schedule (aTHX_ &ta);
1924 break;
1925
1926 case CORO_SLF_CEDE:
1927 prepare_cede (aTHX_ &ta);
1928 break;
1929
1930 case CORO_SLF_CEDE_NOTSELF:
1931 prepare_cede_notself (aTHX_ &ta);
1932 break;
1933
1934 default:
1935 abort ();
1936 }
1937
1938 do
1939 TRANSFER (ta, 0);
1940 while (slf && slf->check (aTHX));
1941
1942 SPAGAIN;
1943
1944 PUTBACK;
1945 SLF_TAIL;
1946 SPAGAIN;
1947 RETURN;
1948}
1949
1950static void
1951coro_slf_patch (pTHX_ CV *cv, int ix, SV **args, int items)
1952{
1953 assert (("FATAL: SLF call recursion in Coro module (please report)", PL_op->op_ppaddr != pp_slf));
1954
1955 assert (("FATAL: SLF call with illegal CV value", CvGV (cv)));
1956 slf_cv = cv;
1957
1958 /* we patch the op, and then re-run the whole call */
1959 /* we have to put the same argument on the stack for this to work */
1960 /* and this will be done by pp_restore */
1961 slf_restore.op_next = (OP *)&slf_restore;
1962 slf_restore.op_type = OP_NULL;
1963 slf_restore.op_ppaddr = pp_restore;
1964 slf_restore.op_first = PL_op;
1965
1966 slf_arg0 = items > 0 ? SvREFCNT_inc (args [0]) : 0;
1967 slf_arg1 = items > 1 ? SvREFCNT_inc (args [1]) : 0;
1968
1969 PL_op->op_ppaddr = pp_slf;
1970 PL_op->op_private = PL_op->op_private & ~OPpENTERSUB_SLF | ix; /* we potentially share our private flags with entersub */
1971
1972 PL_op = (OP *)&slf_restore;
1973}
1974
1975static void
1976api_execute_slf (pTHX_ CV *cv, const struct CoroSLF *slf, SV **arg, int items)
1977{
1978 CvXSUBANY (cv).any_ptr = (void *)slf;
1979 coro_slf_patch (aTHX_ cv, CORO_SLF_CUSTOM, arg, items);
1980}
1981
865MODULE = Coro::State PACKAGE = Coro::State 1982MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
866 1983
867PROTOTYPES: ENABLE 1984PROTOTYPES: DISABLE
868 1985
869BOOT: 1986BOOT:
870{ /* {} necessary for stoopid perl-5.6.x */ 1987{
871 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1988#ifdef USE_ITHREADS
872 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1989 MUTEX_INIT (&coro_lock);
1990# if CORO_PTHREAD
1991 coro_thx = PERL_GET_CONTEXT;
1992# endif
1993#endif
1994 BOOT_PAGESIZE;
1995
1996 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1997 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1998
1999 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2000 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2001 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2002
2003 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2004 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2005 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2006
873 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2007 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
874 2008
875 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2009 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
876 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2010 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
877 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2011 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
878 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2012 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
879
880 if (!padlist_cache)
881 padlist_cache = newHV ();
882 2013
883 main_mainstack = PL_mainstack; 2014 main_mainstack = PL_mainstack;
2015 main_top_env = PL_top_env;
884 2016
2017 while (main_top_env->je_prev)
2018 main_top_env = main_top_env->je_prev;
2019
885 coroapi.ver = CORO_API_VERSION; 2020 coroapi.ver = CORO_API_VERSION;
2021 coroapi.rev = CORO_API_REVISION;
886 coroapi.transfer = api_transfer; 2022 coroapi.transfer = api_transfer;
887} 2023 coroapi.execute_slf = api_execute_slf;
888 2024
889Coro::State 2025 {
890_newprocess(args) 2026 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
891 SV * args 2027
892 PROTOTYPE: $ 2028 if (!svp) croak ("Time::HiRes is required");
2029 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2030
2031 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2032 }
2033
2034 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2035}
2036
2037SV *
2038new (char *klass, ...)
893 CODE: 2039 CODE:
894 Coro__State coro; 2040{
2041 struct coro *coro;
2042 MAGIC *mg;
2043 HV *hv;
2044 int i;
895 2045
896 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
897 croak ("Coro::State::_newprocess expects an arrayref");
898
899 New (0, coro, 1, struct coro); 2046 Newz (0, coro, 1, struct coro);
2047 coro->args = newAV ();
2048 coro->flags = CF_NEW;
900 2049
901 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2050 if (coro_first) coro_first->prev = coro;
902 coro->mainstack = 0; /* actual work is done inside transfer */ 2051 coro->next = coro_first;
903 coro->stack = 0; 2052 coro_first = coro;
904 2053
905 RETVAL = coro; 2054 coro->hv = hv = newHV ();
2055 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2056 mg->mg_flags |= MGf_DUP;
2057 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2058
2059 av_extend (coro->args, items - 1);
2060 for (i = 1; i < items; i++)
2061 av_push (coro->args, newSVsv (ST (i)));
2062}
906 OUTPUT: 2063 OUTPUT:
907 RETVAL 2064 RETVAL
908 2065
909void 2066void
910transfer(prev, next, flags) 2067_set_stacklevel (...)
911 Coro::State_or_hashref prev 2068 ALIAS:
912 Coro::State_or_hashref next 2069 _set_stacklevel = CORO_SLF_SET_STACKLEVEL
913 int flags 2070 Coro::State::transfer = CORO_SLF_TRANSFER
914 PROTOTYPE: @ 2071 Coro::schedule = CORO_SLF_SCHEDULE
2072 Coro::cede = CORO_SLF_CEDE
2073 Coro::cede_notself = CORO_SLF_CEDE_NOTSELF
915 CODE: 2074 CODE:
916 PUTBACK; 2075 coro_slf_patch (aTHX_ cv, ix, &ST (0), items);
917 transfer (aTHX_ prev, next, flags); 2076
918 SPAGAIN; 2077bool
2078_destroy (SV *coro_sv)
2079 CODE:
2080 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2081 OUTPUT:
2082 RETVAL
919 2083
920void 2084void
921DESTROY(coro) 2085_exit (int code)
922 Coro::State coro 2086 PROTOTYPE: $
923 CODE: 2087 CODE:
2088 _exit (code);
924 2089
925 if (coro->mainstack && coro->mainstack != main_mainstack) 2090int
2091cctx_stacksize (int new_stacksize = 0)
2092 CODE:
2093 RETVAL = cctx_stacksize;
2094 if (new_stacksize)
2095 {
2096 cctx_stacksize = new_stacksize;
2097 ++cctx_gen;
2098 }
2099 OUTPUT:
2100 RETVAL
2101
2102int
2103cctx_max_idle (int max_idle = 0)
2104 CODE:
2105 RETVAL = cctx_max_idle;
2106 if (max_idle > 1)
2107 cctx_max_idle = max_idle;
2108 OUTPUT:
2109 RETVAL
2110
2111int
2112cctx_count ()
2113 CODE:
2114 RETVAL = cctx_count;
2115 OUTPUT:
2116 RETVAL
2117
2118int
2119cctx_idle ()
2120 CODE:
2121 RETVAL = cctx_idle;
2122 OUTPUT:
2123 RETVAL
2124
2125void
2126list ()
2127 PPCODE:
2128{
2129 struct coro *coro;
2130 for (coro = coro_first; coro; coro = coro->next)
2131 if (coro->hv)
2132 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2133}
2134
2135void
2136call (Coro::State coro, SV *coderef)
2137 ALIAS:
2138 eval = 1
2139 CODE:
2140{
2141 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
926 { 2142 {
927 struct coro temp; 2143 struct coro temp;
928 2144
2145 if (!(coro->flags & CF_RUNNING))
2146 {
2147 PUTBACK;
2148 save_perl (aTHX_ &temp);
2149 load_perl (aTHX_ coro);
2150 }
2151
2152 {
2153 dSP;
2154 ENTER;
2155 SAVETMPS;
929 PUTBACK; 2156 PUTBACK;
930 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2157 PUSHSTACK;
931 LOAD(aTHX_ coro); 2158 PUSHMARK (SP);
2159
2160 if (ix)
2161 eval_sv (coderef, 0);
2162 else
2163 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2164
2165 POPSTACK;
932 SPAGAIN; 2166 SPAGAIN;
2167 FREETMPS;
2168 LEAVE;
2169 PUTBACK;
2170 }
933 2171
934 destroy_stacks (aTHX); 2172 if (!(coro->flags & CF_RUNNING))
935 2173 {
936 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2174 save_perl (aTHX_ coro);
2175 load_perl (aTHX_ &temp);
937 SPAGAIN; 2176 SPAGAIN;
938 2177 }
939 coro->mainstack = 0;
940 } 2178 }
2179}
941 2180
942 deallocate_stack (coro); 2181SV *
943 2182is_ready (Coro::State coro)
944 Safefree (coro); 2183 PROTOTYPE: $
2184 ALIAS:
2185 is_ready = CF_READY
2186 is_running = CF_RUNNING
2187 is_new = CF_NEW
2188 is_destroyed = CF_DESTROYED
2189 CODE:
2190 RETVAL = boolSV (coro->flags & ix);
2191 OUTPUT:
2192 RETVAL
945 2193
946void 2194void
947flush() 2195throw (Coro::State self, SV *throw = &PL_sv_undef)
948 CODE: 2196 PROTOTYPE: $;$
949#ifdef MAY_FLUSH 2197 CODE:
950 flush_padlist_cache (); 2198 SvREFCNT_dec (self->throw);
951#endif 2199 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
952 2200
953void 2201void
954_exit(code) 2202api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
955 int code 2203 C_ARGS: aTHX_ coro, flags
2204
2205SV *
2206has_cctx (Coro::State coro)
956 PROTOTYPE: $ 2207 PROTOTYPE: $
957 CODE: 2208 CODE:
958#if defined(__GLIBC__) || _POSIX_C_SOURCE 2209 RETVAL = boolSV (!!coro->cctx);
959 _exit (code); 2210 OUTPUT:
960#else 2211 RETVAL
961 signal (SIGTERM, SIG_DFL);
962 raise (SIGTERM);
963 exit (code);
964#endif
965 2212
966MODULE = Coro::State PACKAGE = Coro::Cont 2213int
2214is_traced (Coro::State coro)
2215 PROTOTYPE: $
2216 CODE:
2217 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2218 OUTPUT:
2219 RETVAL
967 2220
968# this is slightly dirty (should expose a c-level api) 2221UV
2222rss (Coro::State coro)
2223 PROTOTYPE: $
2224 ALIAS:
2225 usecount = 1
2226 CODE:
2227 switch (ix)
2228 {
2229 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2230 case 1: RETVAL = coro->usecount; break;
2231 }
2232 OUTPUT:
2233 RETVAL
969 2234
970void 2235void
971yield(...) 2236force_cctx ()
2237 CODE:
2238 struct coro *coro = SvSTATE (coro_current);
2239 coro->cctx->idle_sp = 0;
2240
2241void
2242swap_defsv (Coro::State self)
972 PROTOTYPE: @ 2243 PROTOTYPE: $
2244 ALIAS:
2245 swap_defav = 1
973 CODE: 2246 CODE:
974 static SV *returnstk; 2247 if (!self->slot)
975 SV *sv; 2248 croak ("cannot swap state with coroutine that has no saved state");
976 AV *defav = GvAV (PL_defgv); 2249 else
977 struct coro *prev, *next; 2250 {
2251 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2252 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
978 2253
979 if (!returnstk) 2254 SV *tmp = *src; *src = *dst; *dst = tmp;
980 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2255 }
981
982 /* set up @_ -- ugly */
983 av_clear (defav);
984 av_fill (defav, items - 1);
985 while (items--)
986 av_store (defav, items, SvREFCNT_inc (ST(items)));
987
988 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
989 sv = av_pop ((AV *)SvRV (returnstk));
990 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
991 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
992 SvREFCNT_dec (sv);
993
994 transfer(aTHX_ prev, next, 0);
995 2256
996MODULE = Coro::State PACKAGE = Coro 2257MODULE = Coro::State PACKAGE = Coro
997 2258
998# this is slightly dirty (should expose a c-level api)
999
1000BOOT: 2259BOOT:
1001{ 2260{
1002 int i; 2261 int i;
2262
2263 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2264 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2265 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2266
2267 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2268 SvREADONLY_on (coro_current);
2269
1003 HV *stash = gv_stashpv ("Coro", TRUE); 2270 coro_stash = gv_stashpv ("Coro", TRUE);
1004 2271
1005 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2272 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1006 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2273 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1007 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2274 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1008 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2275 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1009 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2276 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1010 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2277 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1011
1012 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1013 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1014 2278
1015 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2279 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1016 coro_ready[i] = newAV (); 2280 coro_ready[i] = newAV ();
1017 2281
1018 { 2282 {
1019 SV *sv = perl_get_sv("Coro::API", 1); 2283 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1020 2284
1021 coroapi.schedule = api_schedule; 2285 coroapi.schedule = api_schedule;
2286 coroapi.cede = api_cede;
2287 coroapi.cede_notself = api_cede_notself;
1022 coroapi.ready = api_ready; 2288 coroapi.ready = api_ready;
2289 coroapi.is_ready = api_is_ready;
1023 coroapi.nready = &coro_nready; 2290 coroapi.nready = coro_nready;
1024 coroapi.current = coro_current; 2291 coroapi.current = coro_current;
1025 2292
1026 GCoroAPI = &coroapi; 2293 GCoroAPI = &coroapi;
1027 sv_setiv(sv, (IV)&coroapi); 2294 sv_setiv (sv, (IV)&coroapi);
1028 SvREADONLY_on(sv); 2295 SvREADONLY_on (sv);
1029 } 2296 }
1030} 2297}
1031 2298
1032void 2299void
1033ready(self) 2300_set_current (SV *current)
1034 SV * self 2301 PROTOTYPE: $
1035 CODE: 2302 CODE:
1036 api_ready (self); 2303 SvREFCNT_dec (SvRV (coro_current));
2304 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2305
2306void
2307_set_readyhook (SV *hook)
2308 PROTOTYPE: $
2309 CODE:
2310 LOCK;
2311 SvREFCNT_dec (coro_readyhook);
2312 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2313 UNLOCK;
1037 2314
1038int 2315int
2316prio (Coro::State coro, int newprio = 0)
2317 ALIAS:
2318 nice = 1
2319 CODE:
2320{
2321 RETVAL = coro->prio;
2322
2323 if (items > 1)
2324 {
2325 if (ix)
2326 newprio = coro->prio - newprio;
2327
2328 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2329 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2330
2331 coro->prio = newprio;
2332 }
2333}
2334 OUTPUT:
2335 RETVAL
2336
2337SV *
2338ready (SV *self)
2339 PROTOTYPE: $
2340 CODE:
2341 RETVAL = boolSV (api_ready (aTHX_ self));
2342 OUTPUT:
2343 RETVAL
2344
2345int
1039nready(...) 2346nready (...)
1040 PROTOTYPE: 2347 PROTOTYPE:
1041 CODE: 2348 CODE:
1042 RETVAL = coro_nready; 2349 RETVAL = coro_nready;
1043 OUTPUT: 2350 OUTPUT:
1044 RETVAL 2351 RETVAL
1045 2352
2353# for async_pool speedup
1046void 2354void
1047schedule(...) 2355_pool_1 (SV *cb)
1048 PROTOTYPE:
1049 ALIAS:
1050 cede = 1
1051 CODE: 2356 CODE:
1052 api_schedule (ix); 2357{
2358 struct coro *coro = SvSTATE (coro_current);
2359 HV *hv = (HV *)SvRV (coro_current);
2360 AV *defav = GvAV (PL_defgv);
2361 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2362 AV *invoke_av;
2363 int i, len;
1053 2364
2365 if (!invoke)
2366 {
2367 SV *old = PL_diehook;
2368 PL_diehook = 0;
2369 SvREFCNT_dec (old);
2370 croak ("\3async_pool terminate\2\n");
2371 }
2372
2373 SvREFCNT_dec (coro->saved_deffh);
2374 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2375
2376 hv_store (hv, "desc", sizeof ("desc") - 1,
2377 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2378
2379 invoke_av = (AV *)SvRV (invoke);
2380 len = av_len (invoke_av);
2381
2382 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2383
2384 if (len > 0)
2385 {
2386 av_fill (defav, len - 1);
2387 for (i = 0; i < len; ++i)
2388 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2389 }
2390
2391 SvREFCNT_dec (invoke);
2392}
2393
2394void
2395_pool_2 (SV *cb)
2396 CODE:
2397{
2398 struct coro *coro = SvSTATE (coro_current);
2399
2400 sv_setsv (cb, &PL_sv_undef);
2401
2402 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2403 coro->saved_deffh = 0;
2404
2405 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2406 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2407 {
2408 SV *old = PL_diehook;
2409 PL_diehook = 0;
2410 SvREFCNT_dec (old);
2411 croak ("\3async_pool terminate\2\n");
2412 }
2413
2414 av_clear (GvAV (PL_defgv));
2415 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2416 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2417
2418 coro->prio = 0;
2419
2420 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2421 api_trace (aTHX_ coro_current, 0);
2422
2423 av_push (av_async_pool, newSVsv (coro_current));
2424}
2425
2426#if 0
2427
2428void
2429_generator_call (...)
2430 PROTOTYPE: @
2431 PPCODE:
2432 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2433 xxxx
2434 abort ();
2435
2436SV *
2437gensub (SV *sub, ...)
2438 PROTOTYPE: &;@
2439 CODE:
2440{
2441 struct coro *coro;
2442 MAGIC *mg;
2443 CV *xcv;
2444 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2445 int i;
2446
2447 CvGV (ncv) = CvGV (cv);
2448 CvFILE (ncv) = CvFILE (cv);
2449
2450 Newz (0, coro, 1, struct coro);
2451 coro->args = newAV ();
2452 coro->flags = CF_NEW;
2453
2454 av_extend (coro->args, items - 1);
2455 for (i = 1; i < items; i++)
2456 av_push (coro->args, newSVsv (ST (i)));
2457
2458 CvISXSUB_on (ncv);
2459 CvXSUBANY (ncv).any_ptr = (void *)coro;
2460
2461 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2462
2463 CvXSUB (ncv) = CvXSUB (xcv);
2464 CvANON_on (ncv);
2465
2466 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2467 RETVAL = newRV_noinc ((SV *)ncv);
2468}
2469 OUTPUT:
2470 RETVAL
2471
2472#endif
2473
2474
2475MODULE = Coro::State PACKAGE = Coro::AIO
2476
2477void
2478_get_state (SV *self)
2479 PPCODE:
2480{
2481 AV *defav = GvAV (PL_defgv);
2482 AV *av = newAV ();
2483 int i;
2484 SV *data_sv = newSV (sizeof (struct io_state));
2485 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2486 SvCUR_set (data_sv, sizeof (struct io_state));
2487 SvPOK_only (data_sv);
2488
2489 data->errorno = errno;
2490 data->laststype = PL_laststype;
2491 data->laststatval = PL_laststatval;
2492 data->statcache = PL_statcache;
2493
2494 av_extend (av, AvFILLp (defav) + 1 + 1);
2495
2496 for (i = 0; i <= AvFILLp (defav); ++i)
2497 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2498
2499 av_push (av, data_sv);
2500
2501 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2502
2503 api_ready (aTHX_ self);
2504}
2505
2506void
2507_set_state (SV *state)
2508 PROTOTYPE: $
2509 PPCODE:
2510{
2511 AV *av = (AV *)SvRV (state);
2512 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2513 int i;
2514
2515 errno = data->errorno;
2516 PL_laststype = data->laststype;
2517 PL_laststatval = data->laststatval;
2518 PL_statcache = data->statcache;
2519
2520 EXTEND (SP, AvFILLp (av));
2521 for (i = 0; i < AvFILLp (av); ++i)
2522 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2523}
2524
2525
2526MODULE = Coro::State PACKAGE = Coro::AnyEvent
2527
2528BOOT:
2529 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2530
2531SV *
2532_schedule (...)
2533 PROTOTYPE: @
2534 CODE:
2535{
2536 static int incede;
2537
2538 api_cede_notself (aTHX);
2539
2540 ++incede;
2541 while (coro_nready >= incede && api_cede (aTHX))
2542 ;
2543
2544 sv_setsv (sv_activity, &PL_sv_undef);
2545 if (coro_nready >= incede)
2546 {
2547 PUSHMARK (SP);
2548 PUTBACK;
2549 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2550 SPAGAIN;
2551 }
2552
2553 --incede;
2554}
2555
2556
2557MODULE = Coro::State PACKAGE = PerlIO::cede
2558
2559BOOT:
2560 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2561

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