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Comparing Coro/Coro/State.xs (file contents):
Revision 1.25 by root, Wed Aug 15 03:24:07 2001 UTC vs.
Revision 1.281 by root, Sun Nov 16 10:12:38 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 */ 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 delcare 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# if CORO_PTHREAD
148static void *coro_thx;
149# endif
150#endif
151
152/* helper storage struct for Coro::AIO */
153struct io_state
154{
155 AV *res;
156 int errorno;
157 I32 laststype; /* U16 in 5.10.0 */
158 int laststatval;
159 Stat_t statcache;
160};
161
162static double (*nvtime)(); /* so why doesn't it take void? */
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171static volatile struct coro *transfer_next;
36 172
37/* this is actually not only the c stack but also c registers etc... */ 173static GV *irsgv; /* $/ */
174static GV *stdoutgv; /* *STDOUT */
175static SV *rv_diehook;
176static SV *rv_warnhook;
177static HV *hv_sig; /* %SIG */
178
179/* async_pool helper stuff */
180static SV *sv_pool_rss;
181static SV *sv_pool_size;
182static AV *av_async_pool;
183
184/* Coro::AnyEvent */
185static SV *sv_activity;
186
187static struct coro_cctx *cctx_first;
188static int cctx_count, cctx_idle;
189
190enum {
191 CC_MAPPED = 0x01,
192 CC_NOREUSE = 0x02, /* throw this away after tracing */
193 CC_TRACE = 0x04,
194 CC_TRACE_SUB = 0x08, /* trace sub calls */
195 CC_TRACE_LINE = 0x10, /* trace each statement */
196 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
197};
198
199/* this is a structure representing a c-level coroutine */
38typedef struct { 200typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 201{
40 int usecnt; /* shared by how many coroutines */ 202 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 203
204 /* the stack */
205 void *sptr;
206 size_t ssize;
207
208 /* cpu state */
209 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
210 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
211 JMPENV *top_env;
43 coro_context cctx; 212 coro_context cctx;
44 213
45 void *sptr; 214 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 215#if CORO_USE_VALGRIND
47} coro_stack; 216 int valgrind_id;
217#endif
218 unsigned char flags;
219} coro_cctx;
48 220
221enum {
222 CF_RUNNING = 0x0001, /* coroutine is running */
223 CF_READY = 0x0002, /* coroutine is ready */
224 CF_NEW = 0x0004, /* has never been switched to */
225 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
226};
227
228/* the structure where most of the perl state is stored, overlaid on the cxstack */
229typedef struct
230{
231 SV *defsv;
232 AV *defav;
233 SV *errsv;
234 SV *irsgv;
235#define VAR(name,type) type name;
236# include "state.h"
237#undef VAR
238} perl_slots;
239
240#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
241
242/* this is a structure representing a perl-level coroutine */
49struct coro { 243struct coro {
50 /* the optional C context */ 244 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 245 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 246
55 /* optionally saved, might be zero */ 247 /* process data */
56 AV *defav; 248 struct CoroSLF slf_frame; /* saved slf frame */
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; 249 AV *mainstack;
68 SV **stack_sp; 250 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;
91 251
92 /* data associated with this coroutine (initial args) */ 252 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 253 int refcnt; /* coroutines are refcounted, yes */
254 int flags; /* CF_ flags */
255 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
257
258 /* statistics */
259 int usecount; /* number of transfers to this coro */
260
261 /* coro process data */
262 int prio;
263 SV *throw; /* exception to be thrown */
264
265 /* async_pool */
266 SV *saved_deffh;
267
268 /* linked list */
269 struct coro *next, *prev;
94}; 270};
95 271
96typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
98 274
99static AV *main_mainstack; /* used to differentiate between $main and others */ 275static struct CoroSLF slf_frame; /* the current slf frame */
100static HV *coro_state_stash;
101static SV *ucoro_state_sv;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104
105/* mostly copied from op.c:cv_clone2 */
106STATIC AV *
107clone_padlist (AV *protopadlist)
108{
109 AV *av;
110 I32 ix;
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113 SV **pname = AvARRAY (protopad_name);
114 SV **ppad = AvARRAY (protopad);
115 I32 fname = AvFILLp (protopad_name);
116 I32 fpad = AvFILLp (protopad);
117 AV *newpadlist, *newpad_name, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127
128 newpadlist = newAV ();
129 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name);
131 av_store (newpadlist, 1, (SV *) newpad);
132
133 av = newAV (); /* will be @_ */
134 av_extend (av, 0);
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137
138 for (ix = fpad; ix > 0; ix--)
139 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
141 if (namesv && namesv != &PL_sv_undef)
142 {
143 char *name = SvPVX (namesv); /* XXX */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
145 { /* lexical from outside? */
146 npad[ix] = SvREFCNT_inc (ppad[ix]);
147 }
148 else
149 { /* our own lexical */
150 SV *sv;
151 if (*name == '&')
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175
176#if 0 /* return -ENOTUNDERSTOOD */
177 /* Now that vars are all in place, clone nested closures. */
178
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC AV *
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316
317 {
318 dSP;
319 CV *cv;
320
321 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs))
323 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist;
330#ifdef USE_THREADS
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 }
337
338 PUTBACK;
339 }
340}
341
342static void
343save_state(pTHX_ Coro__State c, int flags)
344{
345 {
346 dSP;
347 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo;
350
351 /*
352 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :(
354 */
355
356 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */
358 for (;;)
359 {
360 do
361 {
362 PERL_CONTEXT *cx = &ccstk[cxix--];
363
364 if (CxTYPE(cx) == CXt_SUB)
365 {
366 CV *cv = cx->blk_sub.cv;
367 if (CvDEPTH(cv))
368 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv));
384 PUSHs ((SV *)cv);
385
386 get_padlist (cv); /* this is a monster */
387 }
388 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 }
396 while (cxix >= 0);
397
398 if (top_si->si_type == PERLSI_MAIN)
399 break;
400
401 top_si = top_si->si_prev;
402 ccstk = top_si->si_cxstack;
403 cxix = top_si->si_cxix;
404 }
405
406 PUTBACK;
407 }
408
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412
413 /* I have not the slightest idea of why av_reify is necessary */
414 /* but if it's missing the defav contents magically get replaced sometimes */
415 if (c->defav)
416 av_reify (c->defav);
417
418 c->dowarn = PL_dowarn;
419 c->in_eval = PL_in_eval;
420
421 c->curstackinfo = PL_curstackinfo;
422 c->curstack = PL_curstack;
423 c->mainstack = PL_mainstack;
424 c->stack_sp = PL_stack_sp;
425 c->op = PL_op;
426 c->curpad = PL_curpad;
427 c->stack_base = PL_stack_base;
428 c->stack_max = PL_stack_max;
429 c->tmps_stack = PL_tmps_stack;
430 c->tmps_floor = PL_tmps_floor;
431 c->tmps_ix = PL_tmps_ix;
432 c->tmps_max = PL_tmps_max;
433 c->markstack = PL_markstack;
434 c->markstack_ptr = PL_markstack_ptr;
435 c->markstack_max = PL_markstack_max;
436 c->scopestack = PL_scopestack;
437 c->scopestack_ix = PL_scopestack_ix;
438 c->scopestack_max = PL_scopestack_max;
439 c->savestack = PL_savestack;
440 c->savestack_ix = PL_savestack_ix;
441 c->savestack_max = PL_savestack_max;
442 c->retstack = PL_retstack;
443 c->retstack_ix = PL_retstack_ix;
444 c->retstack_max = PL_retstack_max;
445 c->curcop = PL_curcop;
446 c->top_env = PL_top_env;
447}
448
449/*
450 * allocate various perl stacks. This is an exact copy
451 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need
453 * a lot of stackspace.
454 */
455STATIC void
456coro_init_stacks (pTHX)
457{
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
459 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462
463 PL_stack_base = AvARRAY(PL_curstack);
464 PL_stack_sp = PL_stack_base;
465 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466
467 New(50,PL_tmps_stack,96,SV*);
468 PL_tmps_floor = -1;
469 PL_tmps_ix = -1;
470 PL_tmps_max = 96;
471
472 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16;
475
476 SET_MARK_OFFSET;
477
478 New(54,PL_scopestack,16,I32);
479 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16;
481
482 New(54,PL_savestack,96,ANY);
483 PL_savestack_ix = 0;
484 PL_savestack_max = 96;
485
486 New(54,PL_retstack,8,OP*);
487 PL_retstack_ix = 0;
488 PL_retstack_max = 8;
489}
490
491/*
492 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */
495STATIC void
496destroy_stacks(pTHX)
497{
498 /* is this ugly, I ask? */
499 while (PL_scopestack_ix)
500 LEAVE;
501
502 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS;
505
506 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next;
508
509 while (PL_curstackinfo)
510 {
511 PERL_SI *p = PL_curstackinfo->si_prev;
512
513 {
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
520 dounwind(-1);
521
522 SvREFCNT_dec(PL_curstackinfo->si_stack);
523 Safefree(PL_curstackinfo->si_cxstack);
524 Safefree(PL_curstackinfo);
525 PL_curstackinfo = p;
526 }
527
528 Safefree(PL_tmps_stack);
529 Safefree(PL_markstack);
530 Safefree(PL_scopestack);
531 Safefree(PL_savestack);
532 Safefree(PL_retstack);
533}
534
535static void
536allocate_stack (Coro__State ctx, int alloc)
537{
538 coro_stack *stack;
539
540 New (0, stack, 1, coro_stack);
541
542 stack->refcnt = 1;
543 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0;
545 if (alloc)
546 {
547#ifdef HAVE_MMAP
548 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
550 if (stack->sptr == (void *)-1)
551#endif
552 {
553 /*FIXME*//*D*//* reasonable stack size! */
554 stack->ssize = -4096 * sizeof (long);
555 New (0, stack->sptr, 4096, long);
556 }
557 }
558 else
559 stack->sptr = 0;
560
561 ctx->stack = stack;
562}
563
564static void
565deallocate_stack (Coro__State ctx)
566{
567 coro_stack *stack = ctx->stack;
568
569 ctx->stack = 0;
570
571 if (stack)
572 {
573 if (!--stack->refcnt)
574 {
575#ifdef HAVE_MMAP
576 if (stack->ssize > 0 && stack->sptr)
577 munmap (stack->sptr, stack->ssize);
578 else
579#else
580 Safefree (stack->sptr);
581#endif
582 Safefree (stack);
583 }
584 else if (ctx->gencnt == stack->gencnt)
585 --stack->usecnt;
586 }
587}
588
589static void
590setup_coro (void *arg)
591{
592 /*
593 * emulate part of the perl startup here.
594 */
595 dSP;
596 Coro__State ctx = (Coro__State)arg;
597 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
598
599 coro_init_stacks (aTHX);
600 /*PL_curcop = 0;*/
601 /*PL_in_eval = PL_in_eval;*/ /* inherit */
602 SvREFCNT_dec (GvAV (PL_defgv));
603 GvAV (PL_defgv) = ctx->args;
604
605 SPAGAIN;
606
607 if (ctx->stack)
608 {
609 ctx->cursp = 0;
610
611 PUSHMARK(SP);
612 PUTBACK;
613 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
614
615 if (SvTRUE (ERRSV))
616 croak (NULL);
617 else
618 croak ("FATAL: CCTXT coroutine returned!");
619 }
620 else
621 {
622 UNOP myop;
623
624 PL_op = (OP *)&myop;
625
626 Zero(&myop, 1, UNOP);
627 myop.op_next = Nullop;
628 myop.op_flags = OPf_WANT_VOID;
629
630 PUSHMARK(SP);
631 XPUSHs (sub_init);
632 /*
633 * the next line is slightly wrong, as PL_op->op_next
634 * is actually being executed so we skip the first op.
635 * that doesn't matter, though, since it is only
636 * pp_nextstate and we never return...
637 * ah yes, and I don't care anyways ;)
638 */
639 PUTBACK;
640 PL_op = pp_entersub();
641 SPAGAIN;
642
643 ENTER; /* necessary e.g. for dounwind */
644 }
645}
646
647static void
648continue_coro (void *arg)
649{
650 /*
651 * this is a _very_ stripped down perl interpreter ;)
652 */
653 Coro__State ctx = (Coro__State)arg;
654
655 /*FIXME*//* must set up top_env here */
656 ctx->cursp = 0;
657 PL_op = PL_op->op_next;
658 CALLRUNOPS(aTHX);
659
660 abort ();
661}
662
663STATIC void
664transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
665{
666 dSP;
667 dSTACKLEVEL;
668
669 if (prev != next)
670 {
671 if (next->mainstack)
672 {
673 SAVE (prev, flags);
674 LOAD (next);
675
676 /* mark this state as in-use */
677 next->mainstack = 0;
678 next->tmps_ix = -2;
679
680 /* stacklevel changed? if yes, grab the stack for us! */
681 if (flags & TRANSFER_SAVE_CCTXT)
682 {
683 if (!prev->stack)
684 allocate_stack (prev, 0);
685 else if (prev->cursp != stacklevel
686 && prev->stack->usecnt > 1)
687 {
688 prev->gencnt = ++prev->stack->gencnt;
689 prev->stack->usecnt = 1;
690 }
691
692 /* has our stack been invalidated? */
693 if (next->stack && next->stack->gencnt != next->gencnt)
694 {
695 deallocate_stack (next);
696 allocate_stack (next, 1);
697 coro_create (&(next->stack->cctx),
698 continue_coro, (void *)next,
699 next->stack->sptr, labs (next->stack->ssize));
700 }
701
702 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703 }
704
705 }
706 else if (next->tmps_ix == -2)
707 croak ("tried to transfer to running coroutine");
708 else
709 {
710 SAVE (prev, -1); /* first get rid of the old state */
711
712 if (flags & TRANSFER_SAVE_CCTXT)
713 {
714 if (!prev->stack)
715 allocate_stack (prev, 0);
716
717 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718 {
719 setup_coro (next);
720
721 prev->stack->refcnt++;
722 prev->stack->usecnt++;
723 next->stack = prev->stack;
724 next->gencnt = prev->gencnt;
725 }
726 else
727 {
728 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx),
730 setup_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize));
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733 }
734 }
735 else
736 setup_coro (next);
737 }
738 }
739
740 next->cursp = stacklevel;
741}
742
743static struct coro *
744sv_to_coro (SV *arg, const char *funcname, const char *varname)
745{
746 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
747 {
748 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
749
750 if (!he)
751 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
752
753 arg = HeVAL(he);
754 }
755
756 /* must also be changed inside Coro::Cont::yield */
757 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758 return (struct coro *) SvIV((SV*)SvRV(arg));
759 else
760 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
761}
762
763static void
764api_transfer(pTHX_ SV *prev, SV *next, int flags)
765{
766 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),
767 sv_to_coro (next, "Coro::transfer", "next"),
768 flags);
769}
770 276
771/** Coro ********************************************************************/ 277/** Coro ********************************************************************/
772 278
773#define PRIO_MAX 3 279#define PRIO_MAX 3
774#define PRIO_HIGH 1 280#define PRIO_HIGH 1
… …
776#define PRIO_LOW -1 282#define PRIO_LOW -1
777#define PRIO_IDLE -3 283#define PRIO_IDLE -3
778#define PRIO_MIN -4 284#define PRIO_MIN -4
779 285
780/* for Coro.pm */ 286/* for Coro.pm */
781static GV *coro_current, *coro_idle; 287static SV *coro_current;
288static SV *coro_readyhook;
782static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 289static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
783static int coro_nready; 290static struct coro *coro_first;
291#define coro_nready coroapi.nready
784 292
785static void 293/** lowlevel stuff **********************************************************/
786coro_enq (SV *sv) 294
295static SV *
296coro_get_sv (pTHX_ const char *name, int create)
787{ 297{
788 if (SvROK (sv)) 298#if PERL_VERSION_ATLEAST (5,10,0)
299 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
300 get_sv (name, create);
301#endif
302 return get_sv (name, create);
303}
304
305static AV *
306coro_get_av (pTHX_ const char *name, int create)
307{
308#if PERL_VERSION_ATLEAST (5,10,0)
309 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
310 get_av (name, create);
311#endif
312 return get_av (name, create);
313}
314
315static HV *
316coro_get_hv (pTHX_ const char *name, int create)
317{
318#if PERL_VERSION_ATLEAST (5,10,0)
319 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
320 get_hv (name, create);
321#endif
322 return get_hv (name, create);
323}
324
325static AV *
326coro_clone_padlist (pTHX_ CV *cv)
327{
328 AV *padlist = CvPADLIST (cv);
329 AV *newpadlist, *newpad;
330
331 newpadlist = newAV ();
332 AvREAL_off (newpadlist);
333#if PERL_VERSION_ATLEAST (5,10,0)
334 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
335#else
336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
337#endif
338 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
339 --AvFILLp (padlist);
340
341 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
342 av_store (newpadlist, 1, (SV *)newpad);
343
344 return newpadlist;
345}
346
347static void
348free_padlist (pTHX_ AV *padlist)
349{
350 /* may be during global destruction */
351 if (SvREFCNT (padlist))
789 { 352 {
790 SV *hv = SvRV (sv); 353 I32 i = AvFILLp (padlist);
791 if (SvTYPE (hv) == SVt_PVHV) 354 while (i >= 0)
792 { 355 {
793 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 356 SV **svp = av_fetch (padlist, i--, FALSE);
794 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 357 if (svp)
358 {
359 SV *sv;
360 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
361 SvREFCNT_dec (sv);
795 362
796 prio = prio > PRIO_MAX ? PRIO_MAX 363 SvREFCNT_dec (*svp);
797 : prio < PRIO_MIN ? PRIO_MIN 364 }
798 : prio;
799
800 av_push (coro_ready [prio - PRIO_MIN], sv);
801 coro_nready++;
802
803 return;
804 } 365 }
366
367 SvREFCNT_dec ((SV*)padlist);
368 }
369}
370
371static int
372coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
373{
374 AV *padlist;
375 AV *av = (AV *)mg->mg_obj;
376
377 /* casting is fun. */
378 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
379 free_padlist (aTHX_ padlist);
380
381 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
382
383 return 0;
384}
385
386#define CORO_MAGIC_type_cv PERL_MAGIC_ext
387#define CORO_MAGIC_type_state PERL_MAGIC_ext
388
389static MGVTBL coro_cv_vtbl = {
390 0, 0, 0, 0,
391 coro_cv_free
392};
393
394#define CORO_MAGIC(sv, type) \
395 expect_true (SvMAGIC (sv)) \
396 ? expect_true (SvMAGIC (sv)->mg_type == type) \
397 ? SvMAGIC (sv) \
398 : mg_find (sv, type) \
399 : 0
400
401#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
402#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
403
404INLINE struct coro *
405SvSTATE_ (pTHX_ SV *coro)
406{
407 HV *stash;
408 MAGIC *mg;
409
410 if (SvROK (coro))
411 coro = SvRV (coro);
412
413 if (expect_false (SvTYPE (coro) != SVt_PVHV))
414 croak ("Coro::State object required");
415
416 stash = SvSTASH (coro);
417 if (expect_false (stash != coro_stash && stash != coro_state_stash))
418 {
419 /* very slow, but rare, check */
420 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
421 croak ("Coro::State object required");
422 }
423
424 mg = CORO_MAGIC_state (coro);
425 return (struct coro *)mg->mg_ptr;
426}
427
428#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
429
430/* fastert than SvSTATE, but expects a coroutine hv */
431INLINE struct coro *
432SvSTATE_hv (SV *sv)
433{
434 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
435 ? SvMAGIC (sv)
436 : mg_find (sv, CORO_MAGIC_type_state);
437
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
442
443/* the next two functions merely cache the padlists */
444static void
445get_padlist (pTHX_ CV *cv)
446{
447 MAGIC *mg = CORO_MAGIC_cv (cv);
448 AV *av;
449
450 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
451 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
452 else
453 {
454#if CORO_PREFER_PERL_FUNCTIONS
455 /* this is probably cleaner? but also slower! */
456 /* in practise, it seems to be less stable */
457 CV *cp = Perl_cv_clone (cv);
458 CvPADLIST (cv) = CvPADLIST (cp);
459 CvPADLIST (cp) = 0;
460 SvREFCNT_dec (cp);
461#else
462 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
463#endif
805 } 464 }
465}
806 466
807 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 467static void
468put_padlist (pTHX_ CV *cv)
469{
470 MAGIC *mg = CORO_MAGIC_cv (cv);
471 AV *av;
472
473 if (expect_false (!mg))
474 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
475
476 av = (AV *)mg->mg_obj;
477
478 if (expect_false (AvFILLp (av) >= AvMAX (av)))
479 av_extend (av, AvMAX (av) + 1);
480
481 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
482}
483
484/** load & save, init *******************************************************/
485
486static void
487load_perl (pTHX_ Coro__State c)
488{
489 perl_slots *slot = c->slot;
490 c->slot = 0;
491
492 PL_mainstack = c->mainstack;
493
494 GvSV (PL_defgv) = slot->defsv;
495 GvAV (PL_defgv) = slot->defav;
496 GvSV (PL_errgv) = slot->errsv;
497 GvSV (irsgv) = slot->irsgv;
498
499 #define VAR(name,type) PL_ ## name = slot->name;
500 # include "state.h"
501 #undef VAR
502
503 {
504 dSP;
505
506 CV *cv;
507
508 /* now do the ugly restore mess */
509 while (expect_true (cv = (CV *)POPs))
510 {
511 put_padlist (aTHX_ cv); /* mark this padlist as available */
512 CvDEPTH (cv) = PTR2IV (POPs);
513 CvPADLIST (cv) = (AV *)POPs;
514 }
515
516 PUTBACK;
517 }
518
519 slf_frame = c->slf_frame;
520}
521
522static void
523save_perl (pTHX_ Coro__State c)
524{
525 c->slf_frame = slf_frame;
526
527 {
528 dSP;
529 I32 cxix = cxstack_ix;
530 PERL_CONTEXT *ccstk = cxstack;
531 PERL_SI *top_si = PL_curstackinfo;
532
533 /*
534 * the worst thing you can imagine happens first - we have to save
535 * (and reinitialize) all cv's in the whole callchain :(
536 */
537
538 XPUSHs (Nullsv);
539 /* this loop was inspired by pp_caller */
540 for (;;)
541 {
542 while (expect_true (cxix >= 0))
543 {
544 PERL_CONTEXT *cx = &ccstk[cxix--];
545
546 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
547 {
548 CV *cv = cx->blk_sub.cv;
549
550 if (expect_true (CvDEPTH (cv)))
551 {
552 EXTEND (SP, 3);
553 PUSHs ((SV *)CvPADLIST (cv));
554 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
555 PUSHs ((SV *)cv);
556
557 CvDEPTH (cv) = 0;
558 get_padlist (aTHX_ cv);
559 }
560 }
561 }
562
563 if (expect_true (top_si->si_type == PERLSI_MAIN))
564 break;
565
566 top_si = top_si->si_prev;
567 ccstk = top_si->si_cxstack;
568 cxix = top_si->si_cxix;
569 }
570
571 PUTBACK;
572 }
573
574 /* allocate some space on the context stack for our purposes */
575 /* we manually unroll here, as usually 2 slots is enough */
576 if (SLOT_COUNT >= 1) CXINC;
577 if (SLOT_COUNT >= 2) CXINC;
578 if (SLOT_COUNT >= 3) CXINC;
579 {
580 int i;
581 for (i = 3; i < SLOT_COUNT; ++i)
582 CXINC;
583 }
584 cxstack_ix -= SLOT_COUNT; /* undo allocation */
585
586 c->mainstack = PL_mainstack;
587
588 {
589 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
590
591 slot->defav = GvAV (PL_defgv);
592 slot->defsv = DEFSV;
593 slot->errsv = ERRSV;
594 slot->irsgv = GvSV (irsgv);
595
596 #define VAR(name,type) slot->name = PL_ ## name;
597 # include "state.h"
598 #undef VAR
599 }
600}
601
602/*
603 * allocate various perl stacks. This is almost an exact copy
604 * of perl.c:init_stacks, except that it uses less memory
605 * on the (sometimes correct) assumption that coroutines do
606 * not usually need a lot of stackspace.
607 */
608#if CORO_PREFER_PERL_FUNCTIONS
609# define coro_init_stacks init_stacks
610#else
611static void
612coro_init_stacks (pTHX)
613{
614 PL_curstackinfo = new_stackinfo(32, 8);
615 PL_curstackinfo->si_type = PERLSI_MAIN;
616 PL_curstack = PL_curstackinfo->si_stack;
617 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
618
619 PL_stack_base = AvARRAY(PL_curstack);
620 PL_stack_sp = PL_stack_base;
621 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
622
623 New(50,PL_tmps_stack,32,SV*);
624 PL_tmps_floor = -1;
625 PL_tmps_ix = -1;
626 PL_tmps_max = 32;
627
628 New(54,PL_markstack,16,I32);
629 PL_markstack_ptr = PL_markstack;
630 PL_markstack_max = PL_markstack + 16;
631
632#ifdef SET_MARK_OFFSET
633 SET_MARK_OFFSET;
634#endif
635
636 New(54,PL_scopestack,8,I32);
637 PL_scopestack_ix = 0;
638 PL_scopestack_max = 8;
639
640 New(54,PL_savestack,24,ANY);
641 PL_savestack_ix = 0;
642 PL_savestack_max = 24;
643
644#if !PERL_VERSION_ATLEAST (5,10,0)
645 New(54,PL_retstack,4,OP*);
646 PL_retstack_ix = 0;
647 PL_retstack_max = 4;
648#endif
649}
650#endif
651
652/*
653 * destroy the stacks, the callchain etc...
654 */
655static void
656coro_destruct_stacks (pTHX)
657{
658 while (PL_curstackinfo->si_next)
659 PL_curstackinfo = PL_curstackinfo->si_next;
660
661 while (PL_curstackinfo)
662 {
663 PERL_SI *p = PL_curstackinfo->si_prev;
664
665 if (!IN_DESTRUCT)
666 SvREFCNT_dec (PL_curstackinfo->si_stack);
667
668 Safefree (PL_curstackinfo->si_cxstack);
669 Safefree (PL_curstackinfo);
670 PL_curstackinfo = p;
671 }
672
673 Safefree (PL_tmps_stack);
674 Safefree (PL_markstack);
675 Safefree (PL_scopestack);
676 Safefree (PL_savestack);
677#if !PERL_VERSION_ATLEAST (5,10,0)
678 Safefree (PL_retstack);
679#endif
680}
681
682static size_t
683coro_rss (pTHX_ struct coro *coro)
684{
685 size_t rss = sizeof (*coro);
686
687 if (coro->mainstack)
688 {
689 perl_slots tmp_slot;
690 perl_slots *slot;
691
692 if (coro->flags & CF_RUNNING)
693 {
694 slot = &tmp_slot;
695
696 #define VAR(name,type) slot->name = PL_ ## name;
697 # include "state.h"
698 #undef VAR
699 }
700 else
701 slot = coro->slot;
702
703 if (slot)
704 {
705 rss += sizeof (slot->curstackinfo);
706 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
707 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
708 rss += slot->tmps_max * sizeof (SV *);
709 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
710 rss += slot->scopestack_max * sizeof (I32);
711 rss += slot->savestack_max * sizeof (ANY);
712
713#if !PERL_VERSION_ATLEAST (5,10,0)
714 rss += slot->retstack_max * sizeof (OP *);
715#endif
716 }
717 }
718
719 return rss;
720}
721
722/** coroutine stack handling ************************************************/
723
724static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
726static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
727
728/* apparently < 5.8.8 */
729#ifndef MgPV_nolen_const
730#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
731 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
732 (const char*)(mg)->mg_ptr)
733#endif
734
735/*
736 * This overrides the default magic get method of %SIG elements.
737 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
738 * and instead of tryign to save and restore the hash elements, we just provide
739 * readback here.
740 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
741 * not expecting this to actually change the hook. This is a potential problem
742 * when a schedule happens then, but we ignore this.
743 */
744static int
745coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
746{
747 const char *s = MgPV_nolen_const (mg);
748
749 if (*s == '_')
750 {
751 SV **svp = 0;
752
753 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
754 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
755
756 if (svp)
757 {
758 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
759 return 0;
760 }
761 }
762
763 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
764}
765
766static int
767coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
768{
769 const char *s = MgPV_nolen_const (mg);
770
771 if (*s == '_')
772 {
773 SV **svp = 0;
774
775 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
776 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
777
778 if (svp)
779 {
780 SV *old = *svp;
781 *svp = 0;
782 SvREFCNT_dec (old);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_set (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 = newSVsv (sv);
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
812}
813
814static void
815prepare_nop (pTHX_ struct coro_transfer_args *ta)
816{
817 /* kind of mega-hacky, but works */
818 ta->next = ta->prev = (struct coro *)ta;
819}
820
821static int
822slf_check_nop (pTHX_ struct CoroSLF *frame)
823{
824 return 0;
825}
826
827static void
828coro_setup (pTHX_ struct coro *coro)
829{
830 /*
831 * emulate part of the perl startup here.
832 */
833 coro_init_stacks (aTHX);
834
835 PL_runops = RUNOPS_DEFAULT;
836 PL_curcop = &PL_compiling;
837 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0;
839 PL_curpm = 0;
840 PL_curpad = 0;
841 PL_localizing = 0;
842 PL_dirty = 0;
843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
858
859 {
860 dSP;
861 UNOP myop;
862
863 Zero (&myop, 1, UNOP);
864 myop.op_next = Nullop;
865 myop.op_flags = OPf_WANT_VOID;
866
867 PUSHMARK (SP);
868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
869 PUTBACK;
870 PL_op = (OP *)&myop;
871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
872 SPAGAIN;
873 }
874
875 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
880}
881
882static void
883coro_destruct (pTHX_ struct coro *coro)
884{
885 if (!IN_DESTRUCT)
886 {
887 /* restore all saved variables and stuff */
888 LEAVE_SCOPE (0);
889 assert (PL_tmps_floor == -1);
890
891 /* free all temporaries */
892 FREETMPS;
893 assert (PL_tmps_ix == -1);
894
895 /* unwind all extra stacks */
896 POPSTACK_TO (PL_mainstack);
897
898 /* unwind main stack */
899 dounwind (-1);
900 }
901
902 SvREFCNT_dec (GvSV (PL_defgv));
903 SvREFCNT_dec (GvAV (PL_defgv));
904 SvREFCNT_dec (GvSV (PL_errgv));
905 SvREFCNT_dec (PL_defoutgv);
906 SvREFCNT_dec (PL_rs);
907 SvREFCNT_dec (GvSV (irsgv));
908
909 SvREFCNT_dec (PL_diehook);
910 SvREFCNT_dec (PL_warnhook);
911
912 SvREFCNT_dec (coro->saved_deffh);
913 SvREFCNT_dec (coro->throw);
914
915 coro_destruct_stacks (aTHX);
916}
917
918INLINE void
919free_coro_mortal (pTHX)
920{
921 if (expect_true (coro_mortal))
922 {
923 SvREFCNT_dec (coro_mortal);
924 coro_mortal = 0;
925 }
926}
927
928static int
929runops_trace (pTHX)
930{
931 COP *oldcop = 0;
932 int oldcxix = -2;
933 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
934 coro_cctx *cctx = coro->cctx;
935
936 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
937 {
938 PERL_ASYNC_CHECK ();
939
940 if (cctx->flags & CC_TRACE_ALL)
941 {
942 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
943 {
944 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
945 SV **bot, **top;
946 AV *av = newAV (); /* return values */
947 SV **cb;
948 dSP;
949
950 GV *gv = CvGV (cx->blk_sub.cv);
951 SV *fullname = sv_2mortal (newSV (0));
952 if (isGV (gv))
953 gv_efullname3 (fullname, gv, 0);
954
955 bot = PL_stack_base + cx->blk_oldsp + 1;
956 top = cx->blk_gimme == G_ARRAY ? SP + 1
957 : cx->blk_gimme == G_SCALAR ? bot + 1
958 : bot;
959
960 av_extend (av, top - bot);
961 while (bot < top)
962 av_push (av, SvREFCNT_inc_NN (*bot++));
963
964 PL_runops = RUNOPS_DEFAULT;
965 ENTER;
966 SAVETMPS;
967 EXTEND (SP, 3);
968 PUSHMARK (SP);
969 PUSHs (&PL_sv_no);
970 PUSHs (fullname);
971 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
972 PUTBACK;
973 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
974 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
975 SPAGAIN;
976 FREETMPS;
977 LEAVE;
978 PL_runops = runops_trace;
979 }
980
981 if (oldcop != PL_curcop)
982 {
983 oldcop = PL_curcop;
984
985 if (PL_curcop != &PL_compiling)
986 {
987 SV **cb;
988
989 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
990 {
991 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
992
993 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
994 {
995 runops_proc_t old_runops = PL_runops;
996 dSP;
997 GV *gv = CvGV (cx->blk_sub.cv);
998 SV *fullname = sv_2mortal (newSV (0));
999
1000 if (isGV (gv))
1001 gv_efullname3 (fullname, gv, 0);
1002
1003 PL_runops = RUNOPS_DEFAULT;
1004 ENTER;
1005 SAVETMPS;
1006 EXTEND (SP, 3);
1007 PUSHMARK (SP);
1008 PUSHs (&PL_sv_yes);
1009 PUSHs (fullname);
1010 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1011 PUTBACK;
1012 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1013 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1014 SPAGAIN;
1015 FREETMPS;
1016 LEAVE;
1017 PL_runops = runops_trace;
1018 }
1019
1020 oldcxix = cxstack_ix;
1021 }
1022
1023 if (cctx->flags & CC_TRACE_LINE)
1024 {
1025 dSP;
1026
1027 PL_runops = RUNOPS_DEFAULT;
1028 ENTER;
1029 SAVETMPS;
1030 EXTEND (SP, 3);
1031 PL_runops = RUNOPS_DEFAULT;
1032 PUSHMARK (SP);
1033 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1034 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1035 PUTBACK;
1036 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1037 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1038 SPAGAIN;
1039 FREETMPS;
1040 LEAVE;
1041 PL_runops = runops_trace;
1042 }
1043 }
1044 }
1045 }
1046 }
1047
1048 TAINT_NOT;
1049 return 0;
1050}
1051
1052static void
1053prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1054{
1055 ta->prev = (struct coro *)cctx;
1056 ta->next = 0;
1057}
1058
1059/* inject a fake call to Coro::State::_cctx_init into the execution */
1060/* _cctx_init should be careful, as it could be called at almost any time */
1061/* during execution of a perl program */
1062/* also initialises PL_top_env */
1063static void NOINLINE
1064cctx_prepare (pTHX_ coro_cctx *cctx)
1065{
1066 dSP;
1067 UNOP myop;
1068
1069 PL_top_env = &PL_start_env;
1070
1071 if (cctx->flags & CC_TRACE)
1072 PL_runops = runops_trace;
1073
1074 Zero (&myop, 1, UNOP);
1075 myop.op_next = PL_op;
1076 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1077
1078 PUSHMARK (SP);
1079 EXTEND (SP, 2);
1080 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1081 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1082 PUTBACK;
1083 PL_op = (OP *)&myop;
1084 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1085 SPAGAIN;
1086}
1087
1088/* the tail of transfer: execute stuff we can only do after a transfer */
1089INLINE void
1090transfer_tail (pTHX)
1091{
1092 struct coro *next = (struct coro *)transfer_next;
1093 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1094 assert (("FATAL: next coroutine was zero in transfer_tail (please report)", next));
1095
1096 free_coro_mortal (aTHX);
1097
1098 if (expect_false (next->throw))
1099 {
1100 SV *exception = sv_2mortal (next->throw);
1101
1102 next->throw = 0;
1103 sv_setsv (ERRSV, exception);
1104 croak (0);
1105 }
1106}
1107
1108/*
1109 * this is a _very_ stripped down perl interpreter ;)
1110 */
1111static void
1112cctx_run (void *arg)
1113{
1114#ifdef USE_ITHREADS
1115# if CORO_PTHREAD
1116 PERL_SET_CONTEXT (coro_thx);
1117# endif
1118#endif
1119 {
1120 dTHX;
1121
1122 /* normally we would need to skip the entersub here */
1123 /* not doing so will re-execute it, which is exactly what we want */
1124 /* PL_nop = PL_nop->op_next */
1125
1126 /* inject a fake subroutine call to cctx_init */
1127 cctx_prepare (aTHX_ (coro_cctx *)arg);
1128
1129 /* cctx_run is the alternative tail of transfer() */
1130 /* TODO: throwing an exception here might be deadly, VERIFY */
1131 transfer_tail (aTHX);
1132
1133 /* somebody or something will hit me for both perl_run and PL_restartop */
1134 PL_restartop = PL_op;
1135 perl_run (PL_curinterp);
1136
1137 /*
1138 * If perl-run returns we assume exit() was being called or the coro
1139 * fell off the end, which seems to be the only valid (non-bug)
1140 * reason for perl_run to return. We try to exit by jumping to the
1141 * bootstrap-time "top" top_env, as we cannot restore the "main"
1142 * coroutine as Coro has no such concept
1143 */
1144 PL_top_env = main_top_env;
1145 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1146 }
1147}
1148
1149static coro_cctx *
1150cctx_new ()
1151{
1152 coro_cctx *cctx;
1153
1154 ++cctx_count;
1155 New (0, cctx, 1, coro_cctx);
1156
1157 cctx->gen = cctx_gen;
1158 cctx->flags = 0;
1159 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1160
1161 return cctx;
1162}
1163
1164/* create a new cctx only suitable as source */
1165static coro_cctx *
1166cctx_new_empty ()
1167{
1168 coro_cctx *cctx = cctx_new ();
1169
1170 cctx->sptr = 0;
1171 coro_create (&cctx->cctx, 0, 0, 0, 0);
1172
1173 return cctx;
1174}
1175
1176/* create a new cctx suitable as destination/running a perl interpreter */
1177static coro_cctx *
1178cctx_new_run ()
1179{
1180 coro_cctx *cctx = cctx_new ();
1181 void *stack_start;
1182 size_t stack_size;
1183
1184#if HAVE_MMAP
1185 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1186 /* mmap supposedly does allocate-on-write for us */
1187 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1188
1189 if (cctx->sptr != (void *)-1)
1190 {
1191 #if CORO_STACKGUARD
1192 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1193 #endif
1194 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1195 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1196 cctx->flags |= CC_MAPPED;
1197 }
1198 else
1199#endif
1200 {
1201 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1202 New (0, cctx->sptr, cctx_stacksize, long);
1203
1204 if (!cctx->sptr)
1205 {
1206 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1207 _exit (EXIT_FAILURE);
1208 }
1209
1210 stack_start = cctx->sptr;
1211 stack_size = cctx->ssize;
1212 }
1213
1214 #if CORO_USE_VALGRIND
1215 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1216 #endif
1217
1218 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1219
1220 return cctx;
1221}
1222
1223static void
1224cctx_destroy (coro_cctx *cctx)
1225{
1226 if (!cctx)
1227 return;
1228
1229 --cctx_count;
1230 coro_destroy (&cctx->cctx);
1231
1232 /* coro_transfer creates new, empty cctx's */
1233 if (cctx->sptr)
1234 {
1235 #if CORO_USE_VALGRIND
1236 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1237 #endif
1238
1239#if HAVE_MMAP
1240 if (cctx->flags & CC_MAPPED)
1241 munmap (cctx->sptr, cctx->ssize);
1242 else
1243#endif
1244 Safefree (cctx->sptr);
1245 }
1246
1247 Safefree (cctx);
1248}
1249
1250/* wether this cctx should be destructed */
1251#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1252
1253static coro_cctx *
1254cctx_get (pTHX)
1255{
1256 while (expect_true (cctx_first))
1257 {
1258 coro_cctx *cctx = cctx_first;
1259 cctx_first = cctx->next;
1260 --cctx_idle;
1261
1262 if (expect_true (!CCTX_EXPIRED (cctx)))
1263 return cctx;
1264
1265 cctx_destroy (cctx);
1266 }
1267
1268 return cctx_new_run ();
1269}
1270
1271static void
1272cctx_put (coro_cctx *cctx)
1273{
1274 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1275
1276 /* free another cctx if overlimit */
1277 if (expect_false (cctx_idle >= cctx_max_idle))
1278 {
1279 coro_cctx *first = cctx_first;
1280 cctx_first = first->next;
1281 --cctx_idle;
1282
1283 cctx_destroy (first);
1284 }
1285
1286 ++cctx_idle;
1287 cctx->next = cctx_first;
1288 cctx_first = cctx;
1289}
1290
1291/** coroutine switching *****************************************************/
1292
1293static void
1294transfer_check (pTHX_ struct coro *prev, struct coro *next)
1295{
1296 if (expect_true (prev != next))
1297 {
1298 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1299 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1300
1301 if (expect_false (next->flags & CF_RUNNING))
1302 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1303
1304 if (expect_false (next->flags & CF_DESTROYED))
1305 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1306
1307#if !PERL_VERSION_ATLEAST (5,10,0)
1308 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1309 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1310#endif
1311 }
1312}
1313
1314/* always use the TRANSFER macro */
1315static void NOINLINE
1316transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1317{
1318 dSTACKLEVEL;
1319
1320 /* sometimes transfer is only called to set idle_sp */
1321 if (expect_false (!next))
1322 {
1323 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1324 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1325 }
1326 else if (expect_true (prev != next))
1327 {
1328 coro_cctx *prev__cctx;
1329
1330 if (expect_false (prev->flags & CF_NEW))
1331 {
1332 /* create a new empty/source context */
1333 prev->cctx = cctx_new_empty ();
1334 prev->flags &= ~CF_NEW;
1335 prev->flags |= CF_RUNNING;
1336 }
1337
1338 prev->flags &= ~CF_RUNNING;
1339 next->flags |= CF_RUNNING;
1340
1341 /* first get rid of the old state */
1342 save_perl (aTHX_ prev);
1343
1344 if (expect_false (next->flags & CF_NEW))
1345 {
1346 /* need to start coroutine */
1347 next->flags &= ~CF_NEW;
1348 /* setup coroutine call */
1349 coro_setup (aTHX_ next);
1350 }
1351 else
1352 load_perl (aTHX_ next);
1353
1354 prev__cctx = prev->cctx;
1355
1356 /* possibly untie and reuse the cctx */
1357 if (expect_true (
1358 prev__cctx->idle_sp == (void *)stacklevel
1359 && !(prev__cctx->flags & CC_TRACE)
1360 && !force_cctx
1361 ))
1362 {
1363 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1364 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1365
1366 prev->cctx = 0;
1367
1368 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1369 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1370 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1371 if (!next->cctx)
1372 next->cctx = cctx_get (aTHX);
1373
1374 cctx_put (prev__cctx);
1375 }
1376
1377 ++next->usecount;
1378
1379 if (expect_true (!next->cctx))
1380 next->cctx = cctx_get (aTHX);
1381
1382 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1383 transfer_next = next;
1384
1385 if (expect_false (prev__cctx != next->cctx))
1386 {
1387 prev__cctx->top_env = PL_top_env;
1388 PL_top_env = next->cctx->top_env;
1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1390 }
1391
1392 transfer_tail (aTHX);
1393 }
1394}
1395
1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1398
1399/** high level stuff ********************************************************/
1400
1401static int
1402coro_state_destroy (pTHX_ struct coro *coro)
1403{
1404 if (coro->flags & CF_DESTROYED)
1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1409
1410 coro->flags |= CF_DESTROYED;
1411
1412 if (coro->flags & CF_READY)
1413 {
1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1415 /* alternative: look through all ready queues and remove the coro */
1416 --coro_nready;
1417 }
1418 else
1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1420
1421 if (coro->mainstack && coro->mainstack != main_mainstack)
1422 {
1423 struct coro temp;
1424
1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1426
1427 save_perl (aTHX_ &temp);
1428 load_perl (aTHX_ coro);
1429
1430 coro_destruct (aTHX_ coro);
1431
1432 load_perl (aTHX_ &temp);
1433
1434 coro->slot = 0;
1435 }
1436
1437 cctx_destroy (coro->cctx);
1438 SvREFCNT_dec (coro->args);
1439
1440 if (coro->next) coro->next->prev = coro->prev;
1441 if (coro->prev) coro->prev->next = coro->next;
1442 if (coro == coro_first) coro_first = coro->next;
1443
1444 return 1;
1445}
1446
1447static int
1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1449{
1450 struct coro *coro = (struct coro *)mg->mg_ptr;
1451 mg->mg_ptr = 0;
1452
1453 coro->hv = 0;
1454
1455 if (--coro->refcnt < 0)
1456 {
1457 coro_state_destroy (aTHX_ coro);
1458 Safefree (coro);
1459 }
1460
1461 return 0;
1462}
1463
1464static int
1465coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1466{
1467 struct coro *coro = (struct coro *)mg->mg_ptr;
1468
1469 ++coro->refcnt;
1470
1471 return 0;
1472}
1473
1474static MGVTBL coro_state_vtbl = {
1475 0, 0, 0, 0,
1476 coro_state_free,
1477 0,
1478#ifdef MGf_DUP
1479 coro_state_dup,
1480#else
1481# define MGf_DUP 0
1482#endif
1483};
1484
1485static void
1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1487{
1488 ta->prev = SvSTATE (prev_sv);
1489 ta->next = SvSTATE (next_sv);
1490 TRANSFER_CHECK (*ta);
1491}
1492
1493static void
1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1495{
1496 struct coro_transfer_args ta;
1497
1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1499 TRANSFER (ta, 1);
1500}
1501
1502/** Coro ********************************************************************/
1503
1504INLINE void
1505coro_enq (pTHX_ struct coro *coro)
1506{
1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1508}
1509
1510INLINE SV *
1511coro_deq (pTHX)
1512{
1513 int prio;
1514
1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1516 if (AvFILLp (coro_ready [prio]) >= 0)
1517 return av_shift (coro_ready [prio]);
1518
1519 return 0;
1520}
1521
1522static int
1523api_ready (pTHX_ SV *coro_sv)
1524{
1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
1528
1529 if (SvROK (coro_sv))
1530 coro_sv = SvRV (coro_sv);
1531
1532 coro = SvSTATE (coro_sv);
1533
1534 if (coro->flags & CF_READY)
1535 return 0;
1536
1537 coro->flags |= CF_READY;
1538
1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
1543 ++coro_nready;
1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_DISCARD);
1555 SPAGAIN;
1556
1557 FREETMPS;
1558 LEAVE;
1559 }
1560
1561 if (xs_hook)
1562 xs_hook ();
1563
1564 return 1;
1565}
1566
1567static int
1568api_is_ready (pTHX_ SV *coro_sv)
1569{
1570 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1571}
1572
1573INLINE void
1574prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1575{
1576 SV *prev_sv, *next_sv;
1577
1578 for (;;)
1579 {
1580 next_sv = coro_deq (aTHX);
1581
1582 /* nothing to schedule: call the idle handler */
1583 if (expect_false (!next_sv))
1584 {
1585 dSP;
1586
1587 ENTER;
1588 SAVETMPS;
1589
1590 PUSHMARK (SP);
1591 PUTBACK;
1592 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1593 SPAGAIN;
1594
1595 FREETMPS;
1596 LEAVE;
1597 continue;
1598 }
1599
1600 ta->next = SvSTATE_hv (next_sv);
1601
1602 /* cannot transfer to destroyed coros, skip and look for next */
1603 if (expect_false (ta->next->flags & CF_DESTROYED))
1604 {
1605 SvREFCNT_dec (next_sv);
1606 /* coro_nready has already been taken care of by destroy */
1607 continue;
1608 }
1609
1610 --coro_nready;
1611 break;
1612 }
1613
1614 /* free this only after the transfer */
1615 prev_sv = SvRV (coro_current);
1616 ta->prev = SvSTATE_hv (prev_sv);
1617 TRANSFER_CHECK (*ta);
1618 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1619 ta->next->flags &= ~CF_READY;
1620 SvRV_set (coro_current, next_sv);
1621
1622 free_coro_mortal (aTHX);
1623 coro_mortal = prev_sv;
1624}
1625
1626INLINE void
1627prepare_cede (pTHX_ struct coro_transfer_args *ta)
1628{
1629 api_ready (aTHX_ coro_current);
1630 prepare_schedule (aTHX_ ta);
1631}
1632
1633INLINE void
1634prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1635{
1636 SV *prev = SvRV (coro_current);
1637
1638 if (coro_nready)
1639 {
1640 prepare_schedule (aTHX_ ta);
1641 api_ready (aTHX_ prev);
1642 }
1643 else
1644 prepare_nop (aTHX_ ta);
1645}
1646
1647static void
1648api_schedule (pTHX)
1649{
1650 struct coro_transfer_args ta;
1651
1652 prepare_schedule (aTHX_ &ta);
1653 TRANSFER (ta, 1);
1654}
1655
1656static int
1657api_cede (pTHX)
1658{
1659 struct coro_transfer_args ta;
1660
1661 prepare_cede (aTHX_ &ta);
1662
1663 if (expect_true (ta.prev != ta.next))
1664 {
1665 TRANSFER (ta, 1);
1666 return 1;
1667 }
1668 else
1669 return 0;
1670}
1671
1672static int
1673api_cede_notself (pTHX)
1674{
1675 if (coro_nready)
1676 {
1677 struct coro_transfer_args ta;
1678
1679 prepare_cede_notself (aTHX_ &ta);
1680 TRANSFER (ta, 1);
1681 return 1;
1682 }
1683 else
1684 return 0;
1685}
1686
1687static void
1688api_trace (pTHX_ SV *coro_sv, int flags)
1689{
1690 struct coro *coro = SvSTATE (coro_sv);
1691
1692 if (flags & CC_TRACE)
1693 {
1694 if (!coro->cctx)
1695 coro->cctx = cctx_new_run ();
1696 else if (!(coro->cctx->flags & CC_TRACE))
1697 croak ("cannot enable tracing on coroutine with custom stack,");
1698
1699 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1700 }
1701 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1702 {
1703 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1704
1705 if (coro->flags & CF_RUNNING)
1706 PL_runops = RUNOPS_DEFAULT;
1707 else
1708 coro->slot->runops = RUNOPS_DEFAULT;
1709 }
1710}
1711
1712/*****************************************************************************/
1713/* PerlIO::cede */
1714
1715typedef struct
1716{
1717 PerlIOBuf base;
1718 NV next, every;
1719} PerlIOCede;
1720
1721static IV
1722PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1723{
1724 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1725
1726 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1727 self->next = nvtime () + self->every;
1728
1729 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
808} 1730}
809 1731
810static SV * 1732static SV *
811coro_deq (int min_prio) 1733PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
812{ 1734{
813 int prio = PRIO_MAX - PRIO_MIN; 1735 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
814 1736
815 min_prio -= PRIO_MIN; 1737 return newSVnv (self->every);
816 if (min_prio < 0) 1738}
817 min_prio = 0;
818 1739
819 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1740static IV
820 if (av_len (coro_ready[prio]) >= 0) 1741PerlIOCede_flush (pTHX_ PerlIO *f)
1742{
1743 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1744 double now = nvtime ();
1745
1746 if (now >= self->next)
1747 {
1748 api_cede (aTHX);
1749 self->next = now + self->every;
1750 }
1751
1752 return PerlIOBuf_flush (aTHX_ f);
1753}
1754
1755static PerlIO_funcs PerlIO_cede =
1756{
1757 sizeof(PerlIO_funcs),
1758 "cede",
1759 sizeof(PerlIOCede),
1760 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1761 PerlIOCede_pushed,
1762 PerlIOBuf_popped,
1763 PerlIOBuf_open,
1764 PerlIOBase_binmode,
1765 PerlIOCede_getarg,
1766 PerlIOBase_fileno,
1767 PerlIOBuf_dup,
1768 PerlIOBuf_read,
1769 PerlIOBuf_unread,
1770 PerlIOBuf_write,
1771 PerlIOBuf_seek,
1772 PerlIOBuf_tell,
1773 PerlIOBuf_close,
1774 PerlIOCede_flush,
1775 PerlIOBuf_fill,
1776 PerlIOBase_eof,
1777 PerlIOBase_error,
1778 PerlIOBase_clearerr,
1779 PerlIOBase_setlinebuf,
1780 PerlIOBuf_get_base,
1781 PerlIOBuf_bufsiz,
1782 PerlIOBuf_get_ptr,
1783 PerlIOBuf_get_cnt,
1784 PerlIOBuf_set_ptrcnt,
1785};
1786
1787/*****************************************************************************/
1788
1789static const CV *slf_cv; /* for quick consistency check */
1790
1791static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1792static SV *slf_arg0;
1793static SV *slf_arg1;
1794static SV *slf_arg2;
1795
1796/* this restores the stack in the case we patched the entersub, to */
1797/* recreate the stack frame as perl will on following calls */
1798/* since entersub cleared the stack */
1799static OP *
1800pp_restore (pTHX)
1801{
1802 dSP;
1803
1804 PUSHMARK (SP);
1805
1806 EXTEND (SP, 3);
1807 if (slf_arg0) PUSHs (sv_2mortal (slf_arg0));
1808 if (slf_arg1) PUSHs (sv_2mortal (slf_arg1));
1809 if (slf_arg2) PUSHs (sv_2mortal (slf_arg2));
1810 PUSHs ((SV *)CvGV (slf_cv));
1811
1812 RETURNOP (slf_restore.op_first);
1813}
1814
1815static void
1816slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1817{
1818 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1819}
1820
1821static void
1822slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1823{
1824 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1825
1826 frame->prepare = slf_prepare_set_stacklevel;
1827 frame->check = slf_check_nop;
1828 frame->data = (void *)SvIV (arg [0]);
1829}
1830
1831static void
1832slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1833{
1834 SV **arg = (SV **)slf_frame.data;
1835
1836 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1837}
1838
1839static void
1840slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1841{
1842 if (items != 2)
1843 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1844
1845 frame->prepare = slf_prepare_transfer;
1846 frame->check = slf_check_nop;
1847 frame->data = (void *)arg; /* let's hope it will stay valid */
1848}
1849
1850static void
1851slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_schedule;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede;
1861 frame->check = slf_check_nop;
1862}
1863
1864static void
1865slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 frame->prepare = prepare_cede_notself;
1868 frame->check = slf_check_nop;
1869}
1870
1871/* we hijack an hopefully unused CV flag for our purposes */
1872#define CVf_SLF 0x4000
1873
1874/*
1875 * these not obviously related functions are all rolled into one
1876 * function to increase chances that they all will call transfer with the same
1877 * stack offset
1878 * SLF stands for "schedule-like-function".
1879 */
1880static OP *
1881pp_slf (pTHX)
1882{
1883 I32 checkmark; /* mark SP to see how many elements check has pushed */
1884
1885 /* set up the slf frame, unless it has already been set-up */
1886 /* the latter happens when a new coro has been started */
1887 /* or when a new cctx was attached to an existing coroutine */
1888 if (expect_true (!slf_frame.prepare))
1889 {
1890 /* first iteration */
1891 dSP;
1892 SV **arg = PL_stack_base + TOPMARK + 1;
1893 int items = SP - arg; /* args without function object */
1894 SV *gv = *sp;
1895
1896 /* do a quick consistency check on the "function" object, and if it isn't */
1897 /* for us, divert to the real entersub */
1898 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1899 return PL_ppaddr[OP_ENTERSUB](aTHX);
1900
1901 /* pop args */
1902 SP = PL_stack_base + POPMARK;
1903
1904 if (!(PL_op->op_flags & OPf_STACKED))
1905 {
1906 /* ampersand-form of call, use @_ instead of stack */
1907 AV *av = GvAV (PL_defgv);
1908 arg = AvARRAY (av);
1909 items = AvFILLp (av) + 1;
1910 }
1911
1912 PUTBACK;
1913
1914 /* now call the init function, which needs to set up slf_frame */
1915 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1916 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1917 }
1918
1919 /* now that we have a slf_frame, interpret it! */
1920 /* we use a callback system not to make the code needlessly */
1921 /* complicated, but so we can run multiple perl coros from one cctx */
1922
1923 do
1924 {
1925 struct coro_transfer_args ta;
1926
1927 slf_frame.prepare (aTHX_ &ta);
1928 TRANSFER (ta, 0);
1929
1930 checkmark = PL_stack_sp - PL_stack_base;
1931 }
1932 while (slf_frame.check (aTHX_ &slf_frame));
1933
1934 {
1935 dSP;
1936 SV **bot = PL_stack_base + checkmark;
1937 int gimme = GIMME_V;
1938
1939 slf_frame.prepare = 0; /* invalidate the frame, so it gets initialised again next time */
1940
1941 /* make sure we put something on the stack in scalar context */
1942 if (gimme == G_SCALAR)
821 { 1943 {
822 coro_nready--; 1944 if (sp == bot)
823 return av_shift (coro_ready[prio]); 1945 XPUSHs (&PL_sv_undef);
1946
1947 SP = bot + 1;
824 } 1948 }
825 1949
1950 PUTBACK;
1951 }
1952
1953 return NORMAL;
1954}
1955
1956static void
1957api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, SV **arg, int items)
1958{
1959 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1960
1961 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1962 && PL_op->op_ppaddr != pp_slf)
1963 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1964
1965 if (items > 3)
1966 croak ("Coro only supports up to three arguments to SLF functions currently (not %d), caught", items);
1967
1968 CvFLAGS (cv) |= CVf_SLF;
1969 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1970 slf_cv = cv;
1971
1972 /* we patch the op, and then re-run the whole call */
1973 /* we have to put the same argument on the stack for this to work */
1974 /* and this will be done by pp_restore */
1975 slf_restore.op_next = (OP *)&slf_restore;
1976 slf_restore.op_type = OP_CUSTOM;
1977 slf_restore.op_ppaddr = pp_restore;
1978 slf_restore.op_first = PL_op;
1979
1980 slf_arg0 = items > 0 ? SvREFCNT_inc (arg [0]) : 0;
1981 slf_arg1 = items > 1 ? SvREFCNT_inc (arg [1]) : 0;
1982 slf_arg2 = items > 2 ? SvREFCNT_inc (arg [2]) : 0;
1983
1984 PL_op->op_ppaddr = pp_slf;
1985
1986 PL_op = (OP *)&slf_restore;
1987}
1988
1989/*****************************************************************************/
1990
1991static void
1992coro_semaphore_adjust (pTHX_ AV *av, int adjust)
1993{
1994 SV *count_sv = AvARRAY (av)[0];
1995 IV count = SvIVX (count_sv);
1996
1997 count += adjust;
1998 SvIVX (count_sv) = count;
1999
2000 /* now wake up as many waiters as possible */
2001 while (count > 0 && AvFILLp (av) >= count)
2002 {
2003 SV *cb;
2004
2005 /* swap first two elements so we can shift a waiter */
2006 AvARRAY (av)[0] = AvARRAY (av)[1];
2007 AvARRAY (av)[1] = count_sv;
2008 cb = av_shift (av);
2009
2010 if (SvOBJECT (cb))
2011 api_ready (aTHX_ cb);
2012 else
2013 croak ("callbacks not yet supported");
2014
2015 SvREFCNT_dec (cb);
2016
2017 --count;
2018 }
2019}
2020
2021static void
2022coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2023{
2024 /* call $sem->adjust (0) to possibly wake up some waiters */
2025 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2026}
2027
2028static int
2029slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2030{
2031 AV *av = (AV *)frame->data;
2032 SV *count_sv = AvARRAY (av)[0];
2033
2034 if (SvIVX (count_sv) > 0)
2035 {
2036 SvSTATE_current->on_destroy = 0;
2037 SvIVX (count_sv) = SvIVX (count_sv) - 1;
826 return 0; 2038 return 0;
827} 2039 }
2040 else
2041 {
2042 int i;
2043 /* if we were woken up but can't down, we look through the whole */
2044 /* waiters list and only add us if we aren't in there already */
2045 /* this avoids some degenerate memory usage cases */
828 2046
829static void 2047 for (i = 1; i <= AvFILLp (av); ++i)
830api_ready (SV *coro) 2048 if (AvARRAY (av)[i] == SvRV (coro_current))
831{ 2049 return 1;
832 coro_enq (SvREFCNT_inc (coro));
833}
834 2050
835static void 2051 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
836api_schedule (int cede) 2052 return 1;
837{ 2053 }
838 SV *prev, *next;
839
840 prev = GvSV (coro_current);
841
842 if (cede)
843 coro_enq (SvREFCNT_inc (prev));
844
845 next = coro_deq (PRIO_MIN);
846
847 if (!next)
848 next = SvREFCNT_inc (GvSV (coro_idle));
849
850 GvSV (coro_current) = SvREFCNT_inc (next);
851 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),
852 sv_to_coro (next, "Coro::schedule", "next coroutine"),
853 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
854 SvREFCNT_dec (next);
855 SvREFCNT_dec (prev);
856} 2054}
857 2055
2056static void
2057slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2058{
2059 AV *av = (AV *)SvRV (arg [0]);
2060
2061 if (SvIVX (AvARRAY (av)[0]) > 0)
2062 {
2063 frame->data = (void *)av;
2064 frame->prepare = prepare_nop;
2065 }
2066 else
2067 {
2068 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2069
2070 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2071 frame->prepare = prepare_schedule;
2072
2073 /* to avoid race conditions when a woken-up coro gets terminated */
2074 /* we arrange for a temporary on_destroy that calls adjust (0) */
2075 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2076 }
2077
2078 frame->check = slf_check_semaphore_down;
2079
2080}
2081
2082/*****************************************************************************/
2083
2084#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2085
2086/* create a closure from XS, returns a code reference */
2087/* the arg can be accessed via GENSUB_ARG from the callback */
2088/* the callback must use dXSARGS/XSRETURN */
2089static SV *
2090gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2091{
2092 CV *cv = (CV *)NEWSV (0, 0);
2093
2094 sv_upgrade ((SV *)cv, SVt_PVCV);
2095
2096 CvANON_on (cv);
2097 CvISXSUB_on (cv);
2098 CvXSUB (cv) = xsub;
2099 GENSUB_ARG = arg;
2100
2101 return newRV_noinc ((SV *)cv);
2102}
2103
2104/*****************************************************************************/
2105
858MODULE = Coro::State PACKAGE = Coro::State 2106MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
859 2107
860PROTOTYPES: ENABLE 2108PROTOTYPES: DISABLE
861 2109
862BOOT: 2110BOOT:
863{ /* {} necessary for stoopid perl-5.6.x */ 2111{
864 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2112#ifdef USE_ITHREADS
865 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2113# if CORO_PTHREAD
2114 coro_thx = PERL_GET_CONTEXT;
2115# endif
2116#endif
2117 BOOT_PAGESIZE;
2118
2119 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2120 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2121
2122 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2123 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2124 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2125
2126 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2127 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2128 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2129
866 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2130 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
867 2131
868 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2132 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
869 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2133 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
870 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2134 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
871 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2135 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
872
873 if (!padlist_cache)
874 padlist_cache = newHV ();
875 2136
876 main_mainstack = PL_mainstack; 2137 main_mainstack = PL_mainstack;
2138 main_top_env = PL_top_env;
2139
2140 while (main_top_env->je_prev)
2141 main_top_env = main_top_env->je_prev;
877 2142
878 { 2143 {
879 SV *sv = perl_get_sv("Coro::API", 1); 2144 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
880 2145
881 coroapi.ver = CORO_API_VERSION - 1; 2146 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
882 coroapi.transfer = api_transfer; 2147 hv_store_ent (PL_custom_op_names, slf,
883 coroapi.schedule = api_schedule; 2148 newSVpv ("coro_slf", 0), 0);
884 coroapi.ready = api_ready;
885 coroapi.nready = &coro_nready;
886 2149
887 GCoroAPI = &coroapi; 2150 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
888 sv_setiv(sv, (IV)&coroapi); 2151 hv_store_ent (PL_custom_op_descs, slf,
889 SvREADONLY_on(sv); 2152 newSVpv ("coro schedule like function", 0), 0);
890 } 2153 }
891}
892 2154
893Coro::State 2155 coroapi.ver = CORO_API_VERSION;
894_newprocess(args) 2156 coroapi.rev = CORO_API_REVISION;
895 SV * args 2157
896 PROTOTYPE: $ 2158 coroapi.transfer = api_transfer;
2159
2160 coroapi.sv_state = SvSTATE_;
2161 coroapi.execute_slf = api_execute_slf;
2162 coroapi.prepare_nop = prepare_nop;
2163 coroapi.prepare_schedule = prepare_schedule;
2164 coroapi.prepare_cede = prepare_cede;
2165 coroapi.prepare_cede_notself = prepare_cede_notself;
2166
2167 {
2168 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2169
2170 if (!svp) croak ("Time::HiRes is required");
2171 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2172
2173 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2174 }
2175
2176 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2177}
2178
2179SV *
2180new (char *klass, ...)
897 CODE: 2181 CODE:
898 Coro__State coro; 2182{
2183 struct coro *coro;
2184 MAGIC *mg;
2185 HV *hv;
2186 int i;
899 2187
900 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
901 croak ("Coro::State::_newprocess expects an arrayref");
902
903 New (0, coro, 1, struct coro); 2188 Newz (0, coro, 1, struct coro);
2189 coro->args = newAV ();
2190 coro->flags = CF_NEW;
904 2191
905 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2192 if (coro_first) coro_first->prev = coro;
906 coro->mainstack = 0; /* actual work is done inside transfer */ 2193 coro->next = coro_first;
907 coro->stack = 0; 2194 coro_first = coro;
908 2195
909 RETVAL = coro; 2196 coro->hv = hv = newHV ();
2197 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2198 mg->mg_flags |= MGf_DUP;
2199 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2200
2201 av_extend (coro->args, items - 1);
2202 for (i = 1; i < items; i++)
2203 av_push (coro->args, newSVsv (ST (i)));
2204}
910 OUTPUT: 2205 OUTPUT:
911 RETVAL 2206 RETVAL
912 2207
913void 2208void
914transfer(prev, next, flags) 2209_set_stacklevel (...)
915 Coro::State_or_hashref prev 2210 CODE:
916 Coro::State_or_hashref next 2211 api_execute_slf (aTHX_ cv, slf_init_set_stacklevel, &ST (0), items);
917 int flags
918 PROTOTYPE: @
919 CODE:
920 PUTBACK;
921 transfer (aTHX_ prev, next, flags);
922 SPAGAIN;
923 2212
924void 2213void
925DESTROY(coro) 2214transfer (...)
926 Coro::State coro 2215 PROTOTYPE: $$
927 CODE: 2216 CODE:
2217 api_execute_slf (aTHX_ cv, slf_init_transfer, &ST (0), items);
928 2218
929 if (coro->mainstack && coro->mainstack != main_mainstack) 2219bool
2220_destroy (SV *coro_sv)
2221 CODE:
2222 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2223 OUTPUT:
2224 RETVAL
2225
2226void
2227_exit (int code)
2228 PROTOTYPE: $
2229 CODE:
2230 _exit (code);
2231
2232int
2233cctx_stacksize (int new_stacksize = 0)
2234 PROTOTYPE: ;$
2235 CODE:
2236 RETVAL = cctx_stacksize;
2237 if (new_stacksize)
2238 {
2239 cctx_stacksize = new_stacksize;
2240 ++cctx_gen;
2241 }
2242 OUTPUT:
2243 RETVAL
2244
2245int
2246cctx_max_idle (int max_idle = 0)
2247 PROTOTYPE: ;$
2248 CODE:
2249 RETVAL = cctx_max_idle;
2250 if (max_idle > 1)
2251 cctx_max_idle = max_idle;
2252 OUTPUT:
2253 RETVAL
2254
2255int
2256cctx_count ()
2257 PROTOTYPE:
2258 CODE:
2259 RETVAL = cctx_count;
2260 OUTPUT:
2261 RETVAL
2262
2263int
2264cctx_idle ()
2265 PROTOTYPE:
2266 CODE:
2267 RETVAL = cctx_idle;
2268 OUTPUT:
2269 RETVAL
2270
2271void
2272list ()
2273 PROTOTYPE:
2274 PPCODE:
2275{
2276 struct coro *coro;
2277 for (coro = coro_first; coro; coro = coro->next)
2278 if (coro->hv)
2279 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2280}
2281
2282void
2283call (Coro::State coro, SV *coderef)
2284 ALIAS:
2285 eval = 1
2286 CODE:
2287{
2288 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
930 { 2289 {
931 struct coro temp; 2290 struct coro temp;
932 2291
933 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2292 if (!(coro->flags & CF_RUNNING))
934 LOAD(aTHX_ coro); 2293 {
2294 PUTBACK;
2295 save_perl (aTHX_ &temp);
2296 load_perl (aTHX_ coro);
2297 }
935 2298
936 destroy_stacks (aTHX); 2299 {
2300 dSP;
2301 ENTER;
2302 SAVETMPS;
2303 PUTBACK;
2304 PUSHSTACK;
2305 PUSHMARK (SP);
937 2306
938 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2307 if (ix)
2308 eval_sv (coderef, 0);
2309 else
2310 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
939 2311
940 coro->mainstack = 0; 2312 POPSTACK;
2313 SPAGAIN;
2314 FREETMPS;
2315 LEAVE;
2316 PUTBACK;
2317 }
2318
2319 if (!(coro->flags & CF_RUNNING))
2320 {
2321 save_perl (aTHX_ coro);
2322 load_perl (aTHX_ &temp);
2323 SPAGAIN;
2324 }
941 } 2325 }
2326}
942 2327
943 deallocate_stack (coro); 2328SV *
944 2329is_ready (Coro::State coro)
945 Safefree (coro); 2330 PROTOTYPE: $
2331 ALIAS:
2332 is_ready = CF_READY
2333 is_running = CF_RUNNING
2334 is_new = CF_NEW
2335 is_destroyed = CF_DESTROYED
2336 CODE:
2337 RETVAL = boolSV (coro->flags & ix);
2338 OUTPUT:
2339 RETVAL
946 2340
947void 2341void
948flush() 2342throw (Coro::State self, SV *throw = &PL_sv_undef)
949 CODE: 2343 PROTOTYPE: $;$
950#ifdef MAY_FLUSH 2344 CODE:
951 flush_padlist_cache (); 2345 SvREFCNT_dec (self->throw);
952#endif 2346 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
953 2347
954void 2348void
955_exit(code) 2349api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
956 int code 2350 PROTOTYPE: $;$
2351 C_ARGS: aTHX_ coro, flags
2352
2353SV *
2354has_cctx (Coro::State coro)
957 PROTOTYPE: $ 2355 PROTOTYPE: $
958 CODE: 2356 CODE:
959#if defined(__GLIBC__) || _POSIX_C_SOURCE 2357 RETVAL = boolSV (!!coro->cctx);
960 _exit (code); 2358 OUTPUT:
961#else 2359 RETVAL
962 signal (SIGTERM, SIG_DFL);
963 raise (SIGTERM);
964 exit (code);
965#endif
966 2360
967MODULE = Coro::State PACKAGE = Coro::Cont 2361int
2362is_traced (Coro::State coro)
2363 PROTOTYPE: $
2364 CODE:
2365 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2366 OUTPUT:
2367 RETVAL
968 2368
969# this is slightly dirty (should expose a c-level api) 2369UV
2370rss (Coro::State coro)
2371 PROTOTYPE: $
2372 ALIAS:
2373 usecount = 1
2374 CODE:
2375 switch (ix)
2376 {
2377 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2378 case 1: RETVAL = coro->usecount; break;
2379 }
2380 OUTPUT:
2381 RETVAL
970 2382
971void 2383void
972yield(...) 2384force_cctx ()
2385 PROTOTYPE:
2386 CODE:
2387 SvSTATE_current->cctx->idle_sp = 0;
2388
2389void
2390swap_defsv (Coro::State self)
973 PROTOTYPE: @ 2391 PROTOTYPE: $
2392 ALIAS:
2393 swap_defav = 1
974 CODE: 2394 CODE:
975 static SV *returnstk; 2395 if (!self->slot)
976 SV *sv; 2396 croak ("cannot swap state with coroutine that has no saved state,");
977 AV *defav = GvAV (PL_defgv); 2397 else
978 struct coro *prev, *next; 2398 {
2399 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2400 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
979 2401
980 if (!returnstk) 2402 SV *tmp = *src; *src = *dst; *dst = tmp;
981 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2403 }
982
983 /* set up @_ -- ugly */
984 av_clear (defav);
985 av_fill (defav, items - 1);
986 while (items--)
987 av_store (defav, items, SvREFCNT_inc (ST(items)));
988
989 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
990 sv = av_pop ((AV *)SvRV (returnstk));
991 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
992 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
993 SvREFCNT_dec (sv);
994
995 transfer(aTHX_ prev, next, 0);
996 2404
997MODULE = Coro::State PACKAGE = Coro 2405MODULE = Coro::State PACKAGE = Coro
998 2406
999# this is slightly dirty (should expose a c-level api)
1000
1001BOOT: 2407BOOT:
1002{ 2408{
1003 int i; 2409 int i;
2410
2411 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2412 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2413 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2414
2415 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2416 SvREADONLY_on (coro_current);
2417
1004 HV *stash = gv_stashpv ("Coro", TRUE); 2418 coro_stash = gv_stashpv ("Coro", TRUE);
1005 2419
1006 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2420 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1007 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2421 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1008 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2422 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1009 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2423 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1010 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2424 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1011 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2425 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1012
1013 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1014 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1015 2426
1016 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2427 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1017 coro_ready[i] = newAV (); 2428 coro_ready[i] = newAV ();
2429
2430 {
2431 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2432
2433 coroapi.schedule = api_schedule;
2434 coroapi.cede = api_cede;
2435 coroapi.cede_notself = api_cede_notself;
2436 coroapi.ready = api_ready;
2437 coroapi.is_ready = api_is_ready;
2438 coroapi.nready = coro_nready;
2439 coroapi.current = coro_current;
2440
2441 GCoroAPI = &coroapi;
2442 sv_setiv (sv, (IV)&coroapi);
2443 SvREADONLY_on (sv);
2444 }
1018} 2445}
1019 2446
1020void 2447void
1021ready(self) 2448schedule (...)
1022 SV * self
1023 CODE: 2449 CODE:
1024 api_ready (self); 2450 api_execute_slf (aTHX_ cv, slf_init_schedule, &ST (0), 0);
2451
2452void
2453cede (...)
2454 CODE:
2455 api_execute_slf (aTHX_ cv, slf_init_cede, &ST (0), 0);
2456
2457void
2458cede_notself (...)
2459 CODE:
2460 api_execute_slf (aTHX_ cv, slf_init_cede_notself, &ST (0), 0);
2461
2462void
2463_set_current (SV *current)
2464 PROTOTYPE: $
2465 CODE:
2466 SvREFCNT_dec (SvRV (coro_current));
2467 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2468
2469void
2470_set_readyhook (SV *hook)
2471 PROTOTYPE: $
2472 CODE:
2473 SvREFCNT_dec (coro_readyhook);
2474 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1025 2475
1026int 2476int
2477prio (Coro::State coro, int newprio = 0)
2478 PROTOTYPE: $;$
2479 ALIAS:
2480 nice = 1
2481 CODE:
2482{
2483 RETVAL = coro->prio;
2484
2485 if (items > 1)
2486 {
2487 if (ix)
2488 newprio = coro->prio - newprio;
2489
2490 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2491 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2492
2493 coro->prio = newprio;
2494 }
2495}
2496 OUTPUT:
2497 RETVAL
2498
2499SV *
2500ready (SV *self)
2501 PROTOTYPE: $
2502 CODE:
2503 RETVAL = boolSV (api_ready (aTHX_ self));
2504 OUTPUT:
2505 RETVAL
2506
2507int
1027nready(...) 2508nready (...)
1028 PROTOTYPE: 2509 PROTOTYPE:
1029 CODE: 2510 CODE:
1030 RETVAL = coro_nready; 2511 RETVAL = coro_nready;
1031 OUTPUT: 2512 OUTPUT:
1032 RETVAL 2513 RETVAL
1033 2514
2515# for async_pool speedup
1034void 2516void
1035schedule(...) 2517_pool_1 (SV *cb)
1036 PROTOTYPE:
1037 ALIAS:
1038 cede = 1
1039 CODE: 2518 CODE:
1040 api_schedule (ix); 2519{
2520 HV *hv = (HV *)SvRV (coro_current);
2521 struct coro *coro = SvSTATE_hv ((SV *)hv);
2522 AV *defav = GvAV (PL_defgv);
2523 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2524 AV *invoke_av;
2525 int i, len;
1041 2526
2527 if (!invoke)
2528 {
2529 SV *old = PL_diehook;
2530 PL_diehook = 0;
2531 SvREFCNT_dec (old);
2532 croak ("\3async_pool terminate\2\n");
2533 }
2534
2535 SvREFCNT_dec (coro->saved_deffh);
2536 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2537
2538 hv_store (hv, "desc", sizeof ("desc") - 1,
2539 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2540
2541 invoke_av = (AV *)SvRV (invoke);
2542 len = av_len (invoke_av);
2543
2544 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2545
2546 if (len > 0)
2547 {
2548 av_fill (defav, len - 1);
2549 for (i = 0; i < len; ++i)
2550 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2551 }
2552}
2553
2554void
2555_pool_2 (SV *cb)
2556 CODE:
2557{
2558 struct coro *coro = SvSTATE_current;
2559
2560 sv_setsv (cb, &PL_sv_undef);
2561
2562 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2563 coro->saved_deffh = 0;
2564
2565 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2566 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2567 {
2568 SV *old = PL_diehook;
2569 PL_diehook = 0;
2570 SvREFCNT_dec (old);
2571 croak ("\3async_pool terminate\2\n");
2572 }
2573
2574 av_clear (GvAV (PL_defgv));
2575 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2576 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2577
2578 coro->prio = 0;
2579
2580 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2581 api_trace (aTHX_ coro_current, 0);
2582
2583 av_push (av_async_pool, newSVsv (coro_current));
2584}
2585
2586
2587MODULE = Coro::State PACKAGE = Coro::AIO
2588
2589void
2590_get_state (SV *self)
2591 PROTOTYPE: $
2592 PPCODE:
2593{
2594 AV *defav = GvAV (PL_defgv);
2595 AV *av = newAV ();
2596 int i;
2597 SV *data_sv = newSV (sizeof (struct io_state));
2598 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2599 SvCUR_set (data_sv, sizeof (struct io_state));
2600 SvPOK_only (data_sv);
2601
2602 data->errorno = errno;
2603 data->laststype = PL_laststype;
2604 data->laststatval = PL_laststatval;
2605 data->statcache = PL_statcache;
2606
2607 av_extend (av, AvFILLp (defav) + 1 + 1);
2608
2609 for (i = 0; i <= AvFILLp (defav); ++i)
2610 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2611
2612 av_push (av, data_sv);
2613
2614 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2615
2616 api_ready (aTHX_ self);
2617}
2618
2619void
2620_set_state (SV *state)
2621 PROTOTYPE: $
2622 PPCODE:
2623{
2624 AV *av = (AV *)SvRV (state);
2625 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2626 int i;
2627
2628 errno = data->errorno;
2629 PL_laststype = data->laststype;
2630 PL_laststatval = data->laststatval;
2631 PL_statcache = data->statcache;
2632
2633 EXTEND (SP, AvFILLp (av));
2634 for (i = 0; i < AvFILLp (av); ++i)
2635 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2636}
2637
2638
2639MODULE = Coro::State PACKAGE = Coro::AnyEvent
2640
2641BOOT:
2642 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2643
2644void
2645_schedule (...)
2646 CODE:
2647{
2648 static int incede;
2649
2650 api_cede_notself (aTHX);
2651
2652 ++incede;
2653 while (coro_nready >= incede && api_cede (aTHX))
2654 ;
2655
2656 sv_setsv (sv_activity, &PL_sv_undef);
2657 if (coro_nready >= incede)
2658 {
2659 PUSHMARK (SP);
2660 PUTBACK;
2661 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2662 SPAGAIN;
2663 }
2664
2665 --incede;
2666}
2667
2668
2669MODULE = Coro::State PACKAGE = PerlIO::cede
2670
2671BOOT:
2672 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2673
2674MODULE = Coro::State PACKAGE = Coro::Semaphore
2675
2676SV *
2677new (SV *klass, SV *count_ = 0)
2678 CODE:
2679{
2680 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2681 AV *av = newAV ();
2682 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2683 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2684}
2685 OUTPUT:
2686 RETVAL
2687
2688SV *
2689count (SV *self)
2690 CODE:
2691 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2692 OUTPUT:
2693 RETVAL
2694
2695void
2696up (SV *self, int adjust = 1)
2697 ALIAS:
2698 adjust = 1
2699 CODE:
2700 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2701
2702void
2703down (SV *self)
2704 CODE:
2705 api_execute_slf (aTHX_ cv, slf_init_semaphore_down, &ST (0), 1);
2706
2707void
2708try (SV *self)
2709 PPCODE:
2710{
2711 AV *av = (AV *)SvRV (self);
2712 SV *count_sv = AvARRAY (av)[0];
2713 IV count = SvIVX (count_sv);
2714
2715 if (count > 0)
2716 {
2717 --count;
2718 SvIVX (count_sv) = count;
2719 XSRETURN_YES;
2720 }
2721 else
2722 XSRETURN_NO;
2723}
2724
2725void
2726waiters (SV *self)
2727 CODE:
2728{
2729 AV *av = (AV *)SvRV (self);
2730
2731 if (GIMME_V == G_SCALAR)
2732 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2733 else
2734 {
2735 int i;
2736 EXTEND (SP, AvFILLp (av) + 1 - 1);
2737 for (i = 1; i <= AvFILLp (av); ++i)
2738 PUSHs (newSVsv (AvARRAY (av)[i]));
2739 }
2740}
2741

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