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Comparing Coro/Coro/State.xs (file contents):
Revision 1.26 by root, Fri Aug 17 01:45:39 2001 UTC vs.
Revision 1.321 by root, Sat Nov 22 02:09:54 2008 UTC

1#define CORO_CLONE 1 //D
2
3#include "libcoro/coro.c"
4
5#define PERL_NO_GET_CONTEXT
6#define PERL_EXT
7
1#include "EXTERN.h" 8#include "EXTERN.h"
2#include "perl.h" 9#include "perl.h"
3#include "XSUB.h" 10#include "XSUB.h"
11#include "perliol.h"
4 12
5#include "libcoro/coro.c" 13#include "patchlevel.h"
6 14
7#include <signal.h> 15#include <stdio.h>
16#include <errno.h>
17#include <assert.h>
18
19#ifdef WIN32
20# undef setjmp
21# undef longjmp
22# undef _exit
23# define setjmp _setjmp /* deep magic */
24#else
25# include <inttypes.h> /* most portable stdint.h */
26#endif
8 27
9#ifdef HAVE_MMAP 28#ifdef HAVE_MMAP
10# include <unistd.h> 29# include <unistd.h>
11# include <sys/mman.h> 30# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 31# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 32# ifdef MAP_ANON
33# define MAP_ANONYMOUS MAP_ANON
15# else 34# else
16# undef HAVE_MMAP 35# undef HAVE_MMAP
17# endif 36# endif
18# endif 37# endif
38# include <limits.h>
39# ifndef PAGESIZE
40# define PAGESIZE pagesize
41# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
42static long pagesize;
43# else
44# define BOOT_PAGESIZE (void)0
19#endif 45# endif
46#else
47# define PAGESIZE 0
48# define BOOT_PAGESIZE (void)0
49#endif
20 50
21#define MAY_FLUSH /* increases codesize */ 51#if CORO_USE_VALGRIND
52# include <valgrind/valgrind.h>
53#endif
22 54
23#define SUB_INIT "Coro::State::initialize" 55/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 56static int cctx_max_idle = 4;
25 57
26/* The next macro should delcare a variable stacklevel that contains and approximation 58#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 59 (PERL_REVISION > (a) \
28 * and should be unique. */ 60 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
63
64#if !PERL_VERSION_ATLEAST (5,6,0)
65# ifndef PL_ppaddr
66# define PL_ppaddr ppaddr
67# endif
68# ifndef call_sv
69# define call_sv perl_call_sv
70# endif
71# ifndef get_sv
72# define get_sv perl_get_sv
73# endif
74# ifndef get_cv
75# define get_cv perl_get_cv
76# endif
77# ifndef IS_PADGV
78# define IS_PADGV(v) 0
79# endif
80# ifndef IS_PADCONST
81# define IS_PADCONST(v) 0
82# endif
83#endif
84
85/* 5.11 */
86#ifndef CxHASARGS
87# define CxHASARGS(cx) (cx)->blk_sub.hasargs
88#endif
89
90/* 5.10.0 */
91#ifndef SvREFCNT_inc_NN
92# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
93#endif
94
95/* 5.8.8 */
96#ifndef GV_NOTQUAL
97# define GV_NOTQUAL 0
98#endif
99#ifndef newSV
100# define newSV(l) NEWSV(0,l)
101#endif
102#ifndef CvISXSUB_on
103# define CvISXSUB_on(cv) (void)cv
104#endif
105#ifndef CvISXSUB
106# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
107#endif
108#ifndef Newx
109# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
110#endif
111
112/* 5.8.7 */
113#ifndef SvRV_set
114# define SvRV_set(s,v) SvRV(s) = (v)
115#endif
116
117#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
118# undef CORO_STACKGUARD
119#endif
120
121#ifndef CORO_STACKGUARD
122# define CORO_STACKGUARD 0
123#endif
124
125/* prefer perl internal functions over our own? */
126#ifndef CORO_PREFER_PERL_FUNCTIONS
127# define CORO_PREFER_PERL_FUNCTIONS 0
128#endif
129
130/* The next macros try to return the current stack pointer, in an as
131 * portable way as possible. */
132#if __GNUC__ >= 4
133# define dSTACKLEVEL int stacklevel_dummy
134# define STACKLEVEL __builtin_frame_address (0)
135#else
136# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 137# define STACKLEVEL ((void *)&stacklevel)
138#endif
30 139
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 140#define IN_DESTRUCT (PL_main_cv == Nullcv)
141
142#if __GNUC__ >= 3
143# define attribute(x) __attribute__(x)
144# define expect(expr,value) __builtin_expect ((expr),(value))
145# define INLINE static inline
146#else
147# define attribute(x)
148# define expect(expr,value) (expr)
149# define INLINE static
150#endif
151
152#define expect_false(expr) expect ((expr) != 0, 0)
153#define expect_true(expr) expect ((expr) != 0, 1)
154
155#define NOINLINE attribute ((noinline))
32 156
33#include "CoroAPI.h" 157#include "CoroAPI.h"
158#define GCoroAPI (&coroapi) /* very sneaky */
34 159
160#ifdef USE_ITHREADS
161# if CORO_PTHREAD
162static void *coro_thx;
163# endif
164#endif
165
166static double (*nvtime)(); /* so why doesn't it take void? */
167
168/* we hijack an hopefully unused CV flag for our purposes */
169#define CVf_SLF 0x4000
170static OP *pp_slf (pTHX);
171
172static U32 cctx_gen;
173static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 174static struct CoroAPI coroapi;
175static AV *main_mainstack; /* used to differentiate between $main and others */
176static JMPENV *main_top_env;
177static HV *coro_state_stash, *coro_stash;
178static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 179
37/* this is actually not only the c stack but also c registers etc... */ 180static AV *av_destroy; /* destruction queue */
181static SV *sv_manager; /* the manager coro */
182
183static GV *irsgv; /* $/ */
184static GV *stdoutgv; /* *STDOUT */
185static SV *rv_diehook;
186static SV *rv_warnhook;
187static HV *hv_sig; /* %SIG */
188
189/* async_pool helper stuff */
190static SV *sv_pool_rss;
191static SV *sv_pool_size;
192static SV *sv_async_pool_idle; /* description string */
193static AV *av_async_pool; /* idle pool */
194static SV *sv_Coro; /* class string */
195static CV *cv_pool_handler;
196static CV *cv_coro_state_new;
197
198/* Coro::AnyEvent */
199static SV *sv_activity;
200
201static struct coro_cctx *cctx_first;
202static int cctx_count, cctx_idle;
203
204enum {
205 CC_MAPPED = 0x01,
206 CC_NOREUSE = 0x02, /* throw this away after tracing */
207 CC_TRACE = 0x04,
208 CC_TRACE_SUB = 0x08, /* trace sub calls */
209 CC_TRACE_LINE = 0x10, /* trace each statement */
210 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
211};
212
213/* this is a structure representing a c-level coroutine */
38typedef struct { 214typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 215{
40 int usecnt; /* shared by how many coroutines */ 216 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 217
218 /* the stack */
219 void *sptr;
220 size_t ssize;
221
222 /* cpu state */
223 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
224 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
225 JMPENV *top_env;
43 coro_context cctx; 226 coro_context cctx;
44 227
45 void *sptr; 228 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 229#if CORO_USE_VALGRIND
47} coro_stack; 230 int valgrind_id;
231#endif
232 unsigned char flags;
233} coro_cctx;
48 234
235enum {
236 CF_RUNNING = 0x0001, /* coroutine is running */
237 CF_READY = 0x0002, /* coroutine is ready */
238 CF_NEW = 0x0004, /* has never been switched to */
239 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
240};
241
242/* the structure where most of the perl state is stored, overlaid on the cxstack */
243typedef struct
244{
245 SV *defsv;
246 AV *defav;
247 SV *errsv;
248 SV *irsgv;
249#define VAR(name,type) type name;
250# include "state.h"
251#undef VAR
252} perl_slots;
253
254#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
255
256/* this is a structure representing a perl-level coroutine */
49struct coro { 257struct coro {
50 /* the optional C context */ 258 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 259 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 260
55 /* optionally saved, might be zero */ 261 /* state data */
56 AV *defav; 262 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; 263 AV *mainstack;
68 SV **stack_sp; 264 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;
91 265
266 CV *startcv; /* the CV to execute */
92 /* data associated with this coroutine (initial args) */ 267 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 268 int refcnt; /* coroutines are refcounted, yes */
269 int flags; /* CF_ flags */
270 HV *hv; /* the perl hash associated with this coro, if any */
271 void (*on_destroy)(pTHX_ struct coro *coro);
272
273 /* statistics */
274 int usecount; /* number of transfers to this coro */
275
276 /* coro process data */
277 int prio;
278 SV *except; /* exception to be thrown */
279 SV *rouse_cb;
280
281 /* async_pool */
282 SV *saved_deffh;
283 SV *invoke_cb;
284 AV *invoke_av;
285
286 /* linked list */
287 struct coro *next, *prev;
94}; 288};
95 289
96typedef struct coro *Coro__State; 290typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 291typedef struct coro *Coro__State_or_hashref;
98 292
99static AV *main_mainstack; /* used to differentiate between $main and others */ 293/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 294/* and get copied between struct coro and these variables */
101static SV *ucoro_state_sv; 295/* the mainr easonw e don't support windows process emulation */
102static U32 ucoro_state_hash; 296static struct CoroSLF slf_frame; /* the current slf frame */
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}
770 297
771/** Coro ********************************************************************/ 298/** Coro ********************************************************************/
772 299
773#define PRIO_MAX 3 300#define PRIO_MAX 3
774#define PRIO_HIGH 1 301#define PRIO_HIGH 1
… …
776#define PRIO_LOW -1 303#define PRIO_LOW -1
777#define PRIO_IDLE -3 304#define PRIO_IDLE -3
778#define PRIO_MIN -4 305#define PRIO_MIN -4
779 306
780/* for Coro.pm */ 307/* for Coro.pm */
781static GV *coro_current, *coro_idle; 308static SV *coro_current;
309static SV *coro_readyhook;
782static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 310static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
783static int coro_nready; 311static CV *cv_coro_run, *cv_coro_terminate;
312static struct coro *coro_first;
313#define coro_nready coroapi.nready
784 314
785static void 315/** lowlevel stuff **********************************************************/
786coro_enq (SV *sv) 316
317static SV *
318coro_get_sv (pTHX_ const char *name, int create)
787{ 319{
788 if (SvROK (sv)) 320#if PERL_VERSION_ATLEAST (5,10,0)
321 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
322 get_sv (name, create);
323#endif
324 return get_sv (name, create);
325}
326
327static AV *
328coro_get_av (pTHX_ const char *name, int create)
329{
330#if PERL_VERSION_ATLEAST (5,10,0)
331 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
332 get_av (name, create);
333#endif
334 return get_av (name, create);
335}
336
337static HV *
338coro_get_hv (pTHX_ const char *name, int create)
339{
340#if PERL_VERSION_ATLEAST (5,10,0)
341 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
342 get_hv (name, create);
343#endif
344 return get_hv (name, create);
345}
346
347/* may croak */
348INLINE CV *
349coro_sv_2cv (pTHX_ SV *sv)
350{
351 HV *st;
352 GV *gvp;
353 return sv_2cv (sv, &st, &gvp, 0);
354}
355
356static AV *
357coro_derive_padlist (pTHX_ CV *cv)
358{
359 AV *padlist = CvPADLIST (cv);
360 AV *newpadlist, *newpad;
361
362 newpadlist = newAV ();
363 AvREAL_off (newpadlist);
364#if PERL_VERSION_ATLEAST (5,10,0)
365 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
366#else
367 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
368#endif
369 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
370 --AvFILLp (padlist);
371
372 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
373 av_store (newpadlist, 1, (SV *)newpad);
374
375 return newpadlist;
376}
377
378static void
379free_padlist (pTHX_ AV *padlist)
380{
381 /* may be during global destruction */
382 if (SvREFCNT (padlist))
789 { 383 {
790 SV *hv = SvRV (sv); 384 I32 i = AvFILLp (padlist);
791 if (SvTYPE (hv) == SVt_PVHV) 385 while (i >= 0)
792 { 386 {
793 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 387 SV **svp = av_fetch (padlist, i--, FALSE);
794 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 388 if (svp)
389 {
390 SV *sv;
391 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
392 SvREFCNT_dec (sv);
795 393
796 prio = prio > PRIO_MAX ? PRIO_MAX 394 SvREFCNT_dec (*svp);
797 : prio < PRIO_MIN ? PRIO_MIN 395 }
798 : prio;
799
800 av_push (coro_ready [prio - PRIO_MIN], sv);
801 coro_nready++;
802
803 return;
804 } 396 }
397
398 SvREFCNT_dec ((SV*)padlist);
399 }
400}
401
402static int
403coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
404{
405 AV *padlist;
406 AV *av = (AV *)mg->mg_obj;
407
408 /* casting is fun. */
409 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
410 free_padlist (aTHX_ padlist);
411
412 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
413
414 return 0;
415}
416
417#define CORO_MAGIC_type_cv 26
418#define CORO_MAGIC_type_state PERL_MAGIC_ext
419
420static MGVTBL coro_cv_vtbl = {
421 0, 0, 0, 0,
422 coro_cv_free
423};
424
425#define CORO_MAGIC_NN(sv, type) \
426 (expect_true (SvMAGIC (sv)->mg_type == type) \
427 ? SvMAGIC (sv) \
428 : mg_find (sv, type))
429
430#define CORO_MAGIC(sv, type) \
431 (expect_true (SvMAGIC (sv)) \
432 ? CORO_MAGIC_NN (sv, type) \
433 : 0)
434
435#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
436#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
437
438INLINE struct coro *
439SvSTATE_ (pTHX_ SV *coro)
440{
441 HV *stash;
442 MAGIC *mg;
443
444 if (SvROK (coro))
445 coro = SvRV (coro);
446
447 if (expect_false (SvTYPE (coro) != SVt_PVHV))
448 croak ("Coro::State object required");
449
450 stash = SvSTASH (coro);
451 if (expect_false (stash != coro_stash && stash != coro_state_stash))
452 {
453 /* very slow, but rare, check */
454 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
455 croak ("Coro::State object required");
456 }
457
458 mg = CORO_MAGIC_state (coro);
459 return (struct coro *)mg->mg_ptr;
460}
461
462#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
463
464/* faster than SvSTATE, but expects a coroutine hv */
465#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
466#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
467
468/* the next two functions merely cache the padlists */
469static void
470get_padlist (pTHX_ CV *cv)
471{
472 MAGIC *mg = CORO_MAGIC_cv (cv);
473 AV *av;
474
475 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
476 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
477 else
478 {
479#if CORO_PREFER_PERL_FUNCTIONS
480 /* this is probably cleaner? but also slower! */
481 /* in practise, it seems to be less stable */
482 CV *cp = Perl_cv_clone (aTHX_ cv);
483 CvPADLIST (cv) = CvPADLIST (cp);
484 CvPADLIST (cp) = 0;
485 SvREFCNT_dec (cp);
486#else
487 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
488#endif
805 } 489 }
806
807 croak ("Coro::ready tried to enqueue something that is not a coroutine");
808} 490}
809 491
492static void
493put_padlist (pTHX_ CV *cv)
494{
495 MAGIC *mg = CORO_MAGIC_cv (cv);
496 AV *av;
497
498 if (expect_false (!mg))
499 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
500
501 av = (AV *)mg->mg_obj;
502
503 if (expect_false (AvFILLp (av) >= AvMAX (av)))
504 av_extend (av, AvMAX (av) + 1);
505
506 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
507}
508
509/** load & save, init *******************************************************/
510
511static void
512load_perl (pTHX_ Coro__State c)
513{
514 perl_slots *slot = c->slot;
515 c->slot = 0;
516
517 PL_mainstack = c->mainstack;
518
519 GvSV (PL_defgv) = slot->defsv;
520 GvAV (PL_defgv) = slot->defav;
521 GvSV (PL_errgv) = slot->errsv;
522 GvSV (irsgv) = slot->irsgv;
523
524 #define VAR(name,type) PL_ ## name = slot->name;
525 # include "state.h"
526 #undef VAR
527
528 {
529 dSP;
530
531 CV *cv;
532
533 /* now do the ugly restore mess */
534 while (expect_true (cv = (CV *)POPs))
535 {
536 put_padlist (aTHX_ cv); /* mark this padlist as available */
537 CvDEPTH (cv) = PTR2IV (POPs);
538 CvPADLIST (cv) = (AV *)POPs;
539 }
540
541 PUTBACK;
542 }
543
544 slf_frame = c->slf_frame;
545 CORO_THROW = c->except;
546}
547
548static void
549save_perl (pTHX_ Coro__State c)
550{
551 c->except = CORO_THROW;
552 c->slf_frame = slf_frame;
553
554 {
555 dSP;
556 I32 cxix = cxstack_ix;
557 PERL_CONTEXT *ccstk = cxstack;
558 PERL_SI *top_si = PL_curstackinfo;
559
560 /*
561 * the worst thing you can imagine happens first - we have to save
562 * (and reinitialize) all cv's in the whole callchain :(
563 */
564
565 XPUSHs (Nullsv);
566 /* this loop was inspired by pp_caller */
567 for (;;)
568 {
569 while (expect_true (cxix >= 0))
570 {
571 PERL_CONTEXT *cx = &ccstk[cxix--];
572
573 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
574 {
575 CV *cv = cx->blk_sub.cv;
576
577 if (expect_true (CvDEPTH (cv)))
578 {
579 EXTEND (SP, 3);
580 PUSHs ((SV *)CvPADLIST (cv));
581 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
582 PUSHs ((SV *)cv);
583
584 CvDEPTH (cv) = 0;
585 get_padlist (aTHX_ cv);
586 }
587 }
588 }
589
590 if (expect_true (top_si->si_type == PERLSI_MAIN))
591 break;
592
593 top_si = top_si->si_prev;
594 ccstk = top_si->si_cxstack;
595 cxix = top_si->si_cxix;
596 }
597
598 PUTBACK;
599 }
600
601 /* allocate some space on the context stack for our purposes */
602 /* we manually unroll here, as usually 2 slots is enough */
603 if (SLOT_COUNT >= 1) CXINC;
604 if (SLOT_COUNT >= 2) CXINC;
605 if (SLOT_COUNT >= 3) CXINC;
606 {
607 int i;
608 for (i = 3; i < SLOT_COUNT; ++i)
609 CXINC;
610 }
611 cxstack_ix -= SLOT_COUNT; /* undo allocation */
612
613 c->mainstack = PL_mainstack;
614
615 {
616 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
617
618 slot->defav = GvAV (PL_defgv);
619 slot->defsv = DEFSV;
620 slot->errsv = ERRSV;
621 slot->irsgv = GvSV (irsgv);
622
623 #define VAR(name,type) slot->name = PL_ ## name;
624 # include "state.h"
625 #undef VAR
626 }
627}
628
629/*
630 * allocate various perl stacks. This is almost an exact copy
631 * of perl.c:init_stacks, except that it uses less memory
632 * on the (sometimes correct) assumption that coroutines do
633 * not usually need a lot of stackspace.
634 */
635#if CORO_PREFER_PERL_FUNCTIONS
636# define coro_init_stacks(thx) init_stacks ()
637#else
638static void
639coro_init_stacks (pTHX)
640{
641 PL_curstackinfo = new_stackinfo(32, 8);
642 PL_curstackinfo->si_type = PERLSI_MAIN;
643 PL_curstack = PL_curstackinfo->si_stack;
644 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
645
646 PL_stack_base = AvARRAY(PL_curstack);
647 PL_stack_sp = PL_stack_base;
648 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
649
650 New(50,PL_tmps_stack,32,SV*);
651 PL_tmps_floor = -1;
652 PL_tmps_ix = -1;
653 PL_tmps_max = 32;
654
655 New(54,PL_markstack,16,I32);
656 PL_markstack_ptr = PL_markstack;
657 PL_markstack_max = PL_markstack + 16;
658
659#ifdef SET_MARK_OFFSET
660 SET_MARK_OFFSET;
661#endif
662
663 New(54,PL_scopestack,8,I32);
664 PL_scopestack_ix = 0;
665 PL_scopestack_max = 8;
666
667 New(54,PL_savestack,24,ANY);
668 PL_savestack_ix = 0;
669 PL_savestack_max = 24;
670
671#if !PERL_VERSION_ATLEAST (5,10,0)
672 New(54,PL_retstack,4,OP*);
673 PL_retstack_ix = 0;
674 PL_retstack_max = 4;
675#endif
676}
677#endif
678
679/*
680 * destroy the stacks, the callchain etc...
681 */
682static void
683coro_destruct_stacks (pTHX)
684{
685 while (PL_curstackinfo->si_next)
686 PL_curstackinfo = PL_curstackinfo->si_next;
687
688 while (PL_curstackinfo)
689 {
690 PERL_SI *p = PL_curstackinfo->si_prev;
691
692 if (!IN_DESTRUCT)
693 SvREFCNT_dec (PL_curstackinfo->si_stack);
694
695 Safefree (PL_curstackinfo->si_cxstack);
696 Safefree (PL_curstackinfo);
697 PL_curstackinfo = p;
698 }
699
700 Safefree (PL_tmps_stack);
701 Safefree (PL_markstack);
702 Safefree (PL_scopestack);
703 Safefree (PL_savestack);
704#if !PERL_VERSION_ATLEAST (5,10,0)
705 Safefree (PL_retstack);
706#endif
707}
708
709#define CORO_RSS \
710 rss += sizeof (SYM (curstackinfo)); \
711 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
712 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
713 rss += SYM (tmps_max) * sizeof (SV *); \
714 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
715 rss += SYM (scopestack_max) * sizeof (I32); \
716 rss += SYM (savestack_max) * sizeof (ANY);
717
718static size_t
719coro_rss (pTHX_ struct coro *coro)
720{
721 size_t rss = sizeof (*coro);
722
723 if (coro->mainstack)
724 {
725 if (coro->flags & CF_RUNNING)
726 {
727 #define SYM(sym) PL_ ## sym
728 CORO_RSS;
729 #undef SYM
730 }
731 else
732 {
733 #define SYM(sym) coro->slot->sym
734 CORO_RSS;
735 #undef SYM
736 }
737 }
738
739 return rss;
740}
741
742/** coroutine stack handling ************************************************/
743
744static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
745static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
746static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
747
748/* apparently < 5.8.8 */
749#ifndef MgPV_nolen_const
750#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
751 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
752 (const char*)(mg)->mg_ptr)
753#endif
754
755/*
756 * This overrides the default magic get method of %SIG elements.
757 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
758 * and instead of tryign to save and restore the hash elements, we just provide
759 * readback here.
760 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
761 * not expecting this to actually change the hook. This is a potential problem
762 * when a schedule happens then, but we ignore this.
763 */
764static int
765coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
766{
767 const char *s = MgPV_nolen_const (mg);
768
769 if (*s == '_')
770 {
771 SV **svp = 0;
772
773 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
774 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
775
776 if (svp)
777 {
778 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
779 return 0;
780 }
781 }
782
783 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
784}
785
786static int
787coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
788{
789 const char *s = MgPV_nolen_const (mg);
790
791 if (*s == '_')
792 {
793 SV **svp = 0;
794
795 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
796 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
797
798 if (svp)
799 {
800 SV *old = *svp;
801 *svp = 0;
802 SvREFCNT_dec (old);
803 return 0;
804 }
805 }
806
807 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
808}
809
810static int
811coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
812{
813 const char *s = MgPV_nolen_const (mg);
814
815 if (*s == '_')
816 {
817 SV **svp = 0;
818
819 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
820 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
821
822 if (svp)
823 {
824 SV *old = *svp;
825 *svp = newSVsv (sv);
826 SvREFCNT_dec (old);
827 return 0;
828 }
829 }
830
831 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
832}
833
834static void
835prepare_nop (pTHX_ struct coro_transfer_args *ta)
836{
837 /* kind of mega-hacky, but works */
838 ta->next = ta->prev = (struct coro *)ta;
839}
840
841static int
842slf_check_nop (pTHX_ struct CoroSLF *frame)
843{
844 return 0;
845}
846
847static int
848slf_check_repeat (pTHX_ struct CoroSLF *frame)
849{
850 return 1;
851}
852
853static UNOP coro_setup_op;
854
855static void NOINLINE /* noinline to keep it out of the transfer fast path */
856coro_setup (pTHX_ struct coro *coro)
857{
858 /*
859 * emulate part of the perl startup here.
860 */
861 coro_init_stacks (aTHX);
862
863 PL_runops = RUNOPS_DEFAULT;
864 PL_curcop = &PL_compiling;
865 PL_in_eval = EVAL_NULL;
866 PL_comppad = 0;
867 PL_curpm = 0;
868 PL_curpad = 0;
869 PL_localizing = 0;
870 PL_dirty = 0;
871 PL_restartop = 0;
872#if PERL_VERSION_ATLEAST (5,10,0)
873 PL_parser = 0;
874#endif
875
876 /* recreate the die/warn hooks */
877 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
878 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
879
880 GvSV (PL_defgv) = newSV (0);
881 GvAV (PL_defgv) = coro->args; coro->args = 0;
882 GvSV (PL_errgv) = newSV (0);
883 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
884 PL_rs = newSVsv (GvSV (irsgv));
885 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
886
887 {
888 dSP;
889 UNOP myop;
890
891 Zero (&myop, 1, UNOP);
892 myop.op_next = Nullop;
893 myop.op_type = OP_ENTERSUB;
894 myop.op_flags = OPf_WANT_VOID;
895
896 PUSHMARK (SP);
897 PUSHs ((SV *)coro->startcv);
898 PUTBACK;
899 PL_op = (OP *)&myop;
900 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
901 }
902
903 /* this newly created coroutine might be run on an existing cctx which most
904 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
905 */
906 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
907 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
908
909 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
910 coro_setup_op.op_next = PL_op;
911 coro_setup_op.op_type = OP_ENTERSUB;
912 coro_setup_op.op_ppaddr = pp_slf;
913 /* no flags etc. required, as an init function won't be called */
914
915 PL_op = (OP *)&coro_setup_op;
916
917 /* copy throw, in case it was set before coro_setup */
918 CORO_THROW = coro->except;
919}
920
921static void
922coro_destruct (pTHX_ struct coro *coro)
923{
924 if (!IN_DESTRUCT)
925 {
926 /* restore all saved variables and stuff */
927 LEAVE_SCOPE (0);
928 assert (PL_tmps_floor == -1);
929
930 /* free all temporaries */
931 FREETMPS;
932 assert (PL_tmps_ix == -1);
933
934 /* unwind all extra stacks */
935 POPSTACK_TO (PL_mainstack);
936
937 /* unwind main stack */
938 dounwind (-1);
939 }
940
941 SvREFCNT_dec (GvSV (PL_defgv));
942 SvREFCNT_dec (GvAV (PL_defgv));
943 SvREFCNT_dec (GvSV (PL_errgv));
944 SvREFCNT_dec (PL_defoutgv);
945 SvREFCNT_dec (PL_rs);
946 SvREFCNT_dec (GvSV (irsgv));
947
948 SvREFCNT_dec (PL_diehook);
949 SvREFCNT_dec (PL_warnhook);
950
951 SvREFCNT_dec (coro->saved_deffh);
952 SvREFCNT_dec (coro->rouse_cb);
953 SvREFCNT_dec (coro->invoke_cb);
954 SvREFCNT_dec (coro->invoke_av);
955
956 coro_destruct_stacks (aTHX);
957}
958
959INLINE void
960free_coro_mortal (pTHX)
961{
962 if (expect_true (coro_mortal))
963 {
964 SvREFCNT_dec (coro_mortal);
965 coro_mortal = 0;
966 }
967}
968
969static int
970runops_trace (pTHX)
971{
972 COP *oldcop = 0;
973 int oldcxix = -2;
974 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
975 coro_cctx *cctx = coro->cctx;
976
977 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
978 {
979 PERL_ASYNC_CHECK ();
980
981 if (cctx->flags & CC_TRACE_ALL)
982 {
983 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
984 {
985 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
986 SV **bot, **top;
987 AV *av = newAV (); /* return values */
988 SV **cb;
989 dSP;
990
991 GV *gv = CvGV (cx->blk_sub.cv);
992 SV *fullname = sv_2mortal (newSV (0));
993 if (isGV (gv))
994 gv_efullname3 (fullname, gv, 0);
995
996 bot = PL_stack_base + cx->blk_oldsp + 1;
997 top = cx->blk_gimme == G_ARRAY ? SP + 1
998 : cx->blk_gimme == G_SCALAR ? bot + 1
999 : bot;
1000
1001 av_extend (av, top - bot);
1002 while (bot < top)
1003 av_push (av, SvREFCNT_inc_NN (*bot++));
1004
1005 PL_runops = RUNOPS_DEFAULT;
1006 ENTER;
1007 SAVETMPS;
1008 EXTEND (SP, 3);
1009 PUSHMARK (SP);
1010 PUSHs (&PL_sv_no);
1011 PUSHs (fullname);
1012 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1013 PUTBACK;
1014 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1015 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1016 SPAGAIN;
1017 FREETMPS;
1018 LEAVE;
1019 PL_runops = runops_trace;
1020 }
1021
1022 if (oldcop != PL_curcop)
1023 {
1024 oldcop = PL_curcop;
1025
1026 if (PL_curcop != &PL_compiling)
1027 {
1028 SV **cb;
1029
1030 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1031 {
1032 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1033
1034 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1035 {
1036 dSP;
1037 GV *gv = CvGV (cx->blk_sub.cv);
1038 SV *fullname = sv_2mortal (newSV (0));
1039
1040 if (isGV (gv))
1041 gv_efullname3 (fullname, gv, 0);
1042
1043 PL_runops = RUNOPS_DEFAULT;
1044 ENTER;
1045 SAVETMPS;
1046 EXTEND (SP, 3);
1047 PUSHMARK (SP);
1048 PUSHs (&PL_sv_yes);
1049 PUSHs (fullname);
1050 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1051 PUTBACK;
1052 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1053 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1054 SPAGAIN;
1055 FREETMPS;
1056 LEAVE;
1057 PL_runops = runops_trace;
1058 }
1059
1060 oldcxix = cxstack_ix;
1061 }
1062
1063 if (cctx->flags & CC_TRACE_LINE)
1064 {
1065 dSP;
1066
1067 PL_runops = RUNOPS_DEFAULT;
1068 ENTER;
1069 SAVETMPS;
1070 EXTEND (SP, 3);
1071 PL_runops = RUNOPS_DEFAULT;
1072 PUSHMARK (SP);
1073 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1074 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1075 PUTBACK;
1076 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1077 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1078 SPAGAIN;
1079 FREETMPS;
1080 LEAVE;
1081 PL_runops = runops_trace;
1082 }
1083 }
1084 }
1085 }
1086 }
1087
1088 TAINT_NOT;
1089 return 0;
1090}
1091
1092static struct coro_cctx *cctx_ssl_cctx;
1093static struct CoroSLF cctx_ssl_frame;
1094
1095static void
1096slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1097{
1098 ta->prev = (struct coro *)cctx_ssl_cctx;
1099 ta->next = 0;
1100}
1101
1102static int
1103slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1104{
1105 *frame = cctx_ssl_frame;
1106
1107 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1108}
1109
1110/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1111static void NOINLINE
1112cctx_prepare (pTHX_ coro_cctx *cctx)
1113{
1114 PL_top_env = &PL_start_env;
1115
1116 if (cctx->flags & CC_TRACE)
1117 PL_runops = runops_trace;
1118
1119 /* we already must be executing an SLF op, there is no other valid way
1120 * that can lead to creation of a new cctx */
1121 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1122 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1123
1124 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1125 cctx_ssl_cctx = cctx;
1126 cctx_ssl_frame = slf_frame;
1127
1128 slf_frame.prepare = slf_prepare_set_stacklevel;
1129 slf_frame.check = slf_check_set_stacklevel;
1130}
1131
1132/* the tail of transfer: execute stuff we can only do after a transfer */
1133INLINE void
1134transfer_tail (pTHX)
1135{
1136 free_coro_mortal (aTHX);
1137}
1138
1139/*
1140 * this is a _very_ stripped down perl interpreter ;)
1141 */
1142static void
1143cctx_run (void *arg)
1144{
1145#ifdef USE_ITHREADS
1146# if CORO_PTHREAD
1147 PERL_SET_CONTEXT (coro_thx);
1148# endif
1149#endif
1150 {
1151 dTHX;
1152
1153 /* normally we would need to skip the entersub here */
1154 /* not doing so will re-execute it, which is exactly what we want */
1155 /* PL_nop = PL_nop->op_next */
1156
1157 /* inject a fake subroutine call to cctx_init */
1158 cctx_prepare (aTHX_ (coro_cctx *)arg);
1159
1160 /* cctx_run is the alternative tail of transfer() */
1161 transfer_tail (aTHX);
1162
1163 /* somebody or something will hit me for both perl_run and PL_restartop */
1164 PL_restartop = PL_op;
1165 perl_run (PL_curinterp);
1166 /*
1167 * Unfortunately, there is no way to get at the return values of the
1168 * coro body here, as perl_run destroys these
1169 */
1170
1171 /*
1172 * If perl-run returns we assume exit() was being called or the coro
1173 * fell off the end, which seems to be the only valid (non-bug)
1174 * reason for perl_run to return. We try to exit by jumping to the
1175 * bootstrap-time "top" top_env, as we cannot restore the "main"
1176 * coroutine as Coro has no such concept
1177 */
1178 PL_top_env = main_top_env;
1179 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1180 }
1181}
1182
1183static coro_cctx *
1184cctx_new ()
1185{
1186 coro_cctx *cctx;
1187
1188 ++cctx_count;
1189 New (0, cctx, 1, coro_cctx);
1190
1191 cctx->gen = cctx_gen;
1192 cctx->flags = 0;
1193 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1194
1195 return cctx;
1196}
1197
1198/* create a new cctx only suitable as source */
1199static coro_cctx *
1200cctx_new_empty ()
1201{
1202 coro_cctx *cctx = cctx_new ();
1203
1204 cctx->sptr = 0;
1205 coro_create (&cctx->cctx, 0, 0, 0, 0);
1206
1207 return cctx;
1208}
1209
1210/* create a new cctx suitable as destination/running a perl interpreter */
1211static coro_cctx *
1212cctx_new_run ()
1213{
1214 coro_cctx *cctx = cctx_new ();
1215 void *stack_start;
1216 size_t stack_size;
1217
1218#if HAVE_MMAP
1219 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1220 /* mmap supposedly does allocate-on-write for us */
1221 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1222
1223 if (cctx->sptr != (void *)-1)
1224 {
1225 #if CORO_STACKGUARD
1226 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1227 #endif
1228 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1229 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1230 cctx->flags |= CC_MAPPED;
1231 }
1232 else
1233#endif
1234 {
1235 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1236 New (0, cctx->sptr, cctx_stacksize, long);
1237
1238 if (!cctx->sptr)
1239 {
1240 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1241 _exit (EXIT_FAILURE);
1242 }
1243
1244 stack_start = cctx->sptr;
1245 stack_size = cctx->ssize;
1246 }
1247
1248 #if CORO_USE_VALGRIND
1249 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1250 #endif
1251
1252 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1253
1254 return cctx;
1255}
1256
1257static void
1258cctx_destroy (coro_cctx *cctx)
1259{
1260 if (!cctx)
1261 return;
1262
1263 --cctx_count;
1264 coro_destroy (&cctx->cctx);
1265
1266 /* coro_transfer creates new, empty cctx's */
1267 if (cctx->sptr)
1268 {
1269 #if CORO_USE_VALGRIND
1270 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1271 #endif
1272
1273#if HAVE_MMAP
1274 if (cctx->flags & CC_MAPPED)
1275 munmap (cctx->sptr, cctx->ssize);
1276 else
1277#endif
1278 Safefree (cctx->sptr);
1279 }
1280
1281 Safefree (cctx);
1282}
1283
1284/* wether this cctx should be destructed */
1285#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1286
1287static coro_cctx *
1288cctx_get (pTHX)
1289{
1290 while (expect_true (cctx_first))
1291 {
1292 coro_cctx *cctx = cctx_first;
1293 cctx_first = cctx->next;
1294 --cctx_idle;
1295
1296 if (expect_true (!CCTX_EXPIRED (cctx)))
1297 return cctx;
1298
1299 cctx_destroy (cctx);
1300 }
1301
1302 return cctx_new_run ();
1303}
1304
1305static void
1306cctx_put (coro_cctx *cctx)
1307{
1308 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1309
1310 /* free another cctx if overlimit */
1311 if (expect_false (cctx_idle >= cctx_max_idle))
1312 {
1313 coro_cctx *first = cctx_first;
1314 cctx_first = first->next;
1315 --cctx_idle;
1316
1317 cctx_destroy (first);
1318 }
1319
1320 ++cctx_idle;
1321 cctx->next = cctx_first;
1322 cctx_first = cctx;
1323}
1324
1325/** coroutine switching *****************************************************/
1326
1327static void
1328transfer_check (pTHX_ struct coro *prev, struct coro *next)
1329{
1330 /* TODO: throwing up here is considered harmful */
1331
1332 if (expect_true (prev != next))
1333 {
1334 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1335 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1336
1337 if (expect_false (next->flags & CF_RUNNING))
1338 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1339
1340 if (expect_false (next->flags & CF_DESTROYED))
1341 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1342
1343#if !PERL_VERSION_ATLEAST (5,10,0)
1344 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1345 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1346#endif
1347 }
1348}
1349
1350/* always use the TRANSFER macro */
1351static void NOINLINE /* noinline so we have a fixed stackframe */
1352transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1353{
1354 dSTACKLEVEL;
1355
1356 /* sometimes transfer is only called to set idle_sp */
1357 if (expect_false (!next))
1358 {
1359 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1360 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1361 }
1362 else if (expect_true (prev != next))
1363 {
1364 coro_cctx *prev__cctx;
1365
1366 if (expect_false (prev->flags & CF_NEW))
1367 {
1368 /* create a new empty/source context */
1369 prev->cctx = cctx_new_empty ();
1370 prev->flags &= ~CF_NEW;
1371 prev->flags |= CF_RUNNING;
1372 }
1373
1374 prev->flags &= ~CF_RUNNING;
1375 next->flags |= CF_RUNNING;
1376
1377 /* first get rid of the old state */
1378 save_perl (aTHX_ prev);
1379
1380 if (expect_false (next->flags & CF_NEW))
1381 {
1382 /* need to start coroutine */
1383 next->flags &= ~CF_NEW;
1384 /* setup coroutine call */
1385 coro_setup (aTHX_ next);
1386 }
1387 else
1388 load_perl (aTHX_ next);
1389
1390 prev__cctx = prev->cctx;
1391
1392 /* possibly untie and reuse the cctx */
1393 if (expect_true (
1394 prev__cctx->idle_sp == STACKLEVEL
1395 && !(prev__cctx->flags & CC_TRACE)
1396 && !force_cctx
1397 ))
1398 {
1399 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1400 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1401
1402 prev->cctx = 0;
1403
1404 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1405 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1406 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1407 if (!next->cctx)
1408 next->cctx = cctx_get (aTHX);
1409
1410 cctx_put (prev__cctx);
1411 }
1412
1413 ++next->usecount;
1414
1415 if (expect_true (!next->cctx))
1416 next->cctx = cctx_get (aTHX);
1417
1418 if (expect_false (prev__cctx != next->cctx))
1419 {
1420 prev__cctx->top_env = PL_top_env;
1421 PL_top_env = next->cctx->top_env;
1422 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1423 }
1424
1425 transfer_tail (aTHX);
1426 }
1427}
1428
1429#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1430#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1431
1432/** high level stuff ********************************************************/
1433
1434static int
1435coro_state_destroy (pTHX_ struct coro *coro)
1436{
1437 if (coro->flags & CF_DESTROYED)
1438 return 0;
1439
1440 if (coro->on_destroy)
1441 coro->on_destroy (aTHX_ coro);
1442
1443 coro->flags |= CF_DESTROYED;
1444
1445 if (coro->flags & CF_READY)
1446 {
1447 /* reduce nready, as destroying a ready coro effectively unreadies it */
1448 /* alternative: look through all ready queues and remove the coro */
1449 --coro_nready;
1450 }
1451 else
1452 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1453
1454 if (coro->mainstack && coro->mainstack != main_mainstack)
1455 {
1456 struct coro temp;
1457
1458 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1459
1460 save_perl (aTHX_ &temp);
1461 load_perl (aTHX_ coro);
1462
1463 coro_destruct (aTHX_ coro);
1464
1465 load_perl (aTHX_ &temp);
1466
1467 coro->slot = 0;
1468 }
1469
1470 cctx_destroy (coro->cctx);
1471 SvREFCNT_dec (coro->startcv);
1472 SvREFCNT_dec (coro->args);
1473 SvREFCNT_dec (CORO_THROW);
1474
1475 if (coro->next) coro->next->prev = coro->prev;
1476 if (coro->prev) coro->prev->next = coro->next;
1477 if (coro == coro_first) coro_first = coro->next;
1478
1479 return 1;
1480}
1481
1482static int
1483coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1484{
1485 struct coro *coro = (struct coro *)mg->mg_ptr;
1486 mg->mg_ptr = 0;
1487
1488 coro->hv = 0;
1489
1490 if (--coro->refcnt < 0)
1491 {
1492 coro_state_destroy (aTHX_ coro);
1493 Safefree (coro);
1494 }
1495
1496 return 0;
1497}
1498
1499static int
1500coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1501{
1502 struct coro *coro = (struct coro *)mg->mg_ptr;
1503
1504 ++coro->refcnt;
1505
1506 return 0;
1507}
1508
1509static MGVTBL coro_state_vtbl = {
1510 0, 0, 0, 0,
1511 coro_state_free,
1512 0,
1513#ifdef MGf_DUP
1514 coro_state_dup,
1515#else
1516# define MGf_DUP 0
1517#endif
1518};
1519
1520static void
1521prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1522{
1523 ta->prev = SvSTATE (prev_sv);
1524 ta->next = SvSTATE (next_sv);
1525 TRANSFER_CHECK (*ta);
1526}
1527
1528static void
1529api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1530{
1531 struct coro_transfer_args ta;
1532
1533 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1534 TRANSFER (ta, 1);
1535}
1536
1537/*****************************************************************************/
1538/* gensub: simple closure generation utility */
1539
1540#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1541
1542/* create a closure from XS, returns a code reference */
1543/* the arg can be accessed via GENSUB_ARG from the callback */
1544/* the callback must use dXSARGS/XSRETURN */
810static SV * 1545static SV *
811coro_deq (int min_prio) 1546gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
812{ 1547{
813 int prio = PRIO_MAX - PRIO_MIN; 1548 CV *cv = (CV *)newSV (0);
814 1549
815 min_prio -= PRIO_MIN; 1550 sv_upgrade ((SV *)cv, SVt_PVCV);
816 if (min_prio < 0)
817 min_prio = 0;
818 1551
1552 CvANON_on (cv);
1553 CvISXSUB_on (cv);
1554 CvXSUB (cv) = xsub;
1555 GENSUB_ARG = arg;
1556
1557 return newRV_noinc ((SV *)cv);
1558}
1559
1560/** Coro ********************************************************************/
1561
1562INLINE void
1563coro_enq (pTHX_ struct coro *coro)
1564{
1565 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1566}
1567
1568INLINE SV *
1569coro_deq (pTHX)
1570{
1571 int prio;
1572
819 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1573 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
820 if (av_len (coro_ready[prio]) >= 0) 1574 if (AvFILLp (coro_ready [prio]) >= 0)
1575 return av_shift (coro_ready [prio]);
1576
1577 return 0;
1578}
1579
1580static int
1581api_ready (pTHX_ SV *coro_sv)
1582{
1583 struct coro *coro;
1584 SV *sv_hook;
1585 void (*xs_hook)(void);
1586
1587 if (SvROK (coro_sv))
1588 coro_sv = SvRV (coro_sv);
1589
1590 coro = SvSTATE (coro_sv);
1591
1592 if (coro->flags & CF_READY)
1593 return 0;
1594
1595 coro->flags |= CF_READY;
1596
1597 sv_hook = coro_nready ? 0 : coro_readyhook;
1598 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1599
1600 coro_enq (aTHX_ coro);
1601 ++coro_nready;
1602
1603 if (sv_hook)
1604 {
1605 dSP;
1606
1607 ENTER;
1608 SAVETMPS;
1609
1610 PUSHMARK (SP);
1611 PUTBACK;
1612 call_sv (sv_hook, G_VOID | G_DISCARD);
1613
1614 FREETMPS;
1615 LEAVE;
1616 }
1617
1618 if (xs_hook)
1619 xs_hook ();
1620
1621 return 1;
1622}
1623
1624static int
1625api_is_ready (pTHX_ SV *coro_sv)
1626{
1627 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1628}
1629
1630/* expects to own a reference to next->hv */
1631INLINE void
1632prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1633{
1634 SV *prev_sv = SvRV (coro_current);
1635
1636 ta->prev = SvSTATE_hv (prev_sv);
1637 ta->next = next;
1638
1639 TRANSFER_CHECK (*ta);
1640
1641 SvRV_set (coro_current, (SV *)next->hv);
1642
1643 free_coro_mortal (aTHX);
1644 coro_mortal = prev_sv;
1645}
1646
1647static void
1648prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1649{
1650 for (;;)
1651 {
1652 SV *next_sv = coro_deq (aTHX);
1653
1654 if (expect_true (next_sv))
1655 {
1656 struct coro *next = SvSTATE_hv (next_sv);
1657
1658 /* cannot transfer to destroyed coros, skip and look for next */
1659 if (expect_false (next->flags & CF_DESTROYED))
1660 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1661 else
1662 {
1663 next->flags &= ~CF_READY;
1664 --coro_nready;
1665
1666 prepare_schedule_to (aTHX_ ta, next);
1667 break;
1668 }
1669 }
1670 else
1671 {
1672 /* nothing to schedule: call the idle handler */
1673 dSP;
1674
1675 ENTER;
1676 SAVETMPS;
1677
1678 PUSHMARK (SP);
1679 PUTBACK;
1680 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1681
1682 FREETMPS;
1683 LEAVE;
1684 }
1685 }
1686}
1687
1688INLINE void
1689prepare_cede (pTHX_ struct coro_transfer_args *ta)
1690{
1691 api_ready (aTHX_ coro_current);
1692 prepare_schedule (aTHX_ ta);
1693}
1694
1695INLINE void
1696prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1697{
1698 SV *prev = SvRV (coro_current);
1699
1700 if (coro_nready)
1701 {
1702 prepare_schedule (aTHX_ ta);
1703 api_ready (aTHX_ prev);
1704 }
1705 else
1706 prepare_nop (aTHX_ ta);
1707}
1708
1709static void
1710api_schedule (pTHX)
1711{
1712 struct coro_transfer_args ta;
1713
1714 prepare_schedule (aTHX_ &ta);
1715 TRANSFER (ta, 1);
1716}
1717
1718static void
1719api_schedule_to (pTHX_ SV *coro_sv)
1720{
1721 struct coro_transfer_args ta;
1722 struct coro *next = SvSTATE (coro_sv);
1723
1724 SvREFCNT_inc_NN (coro_sv);
1725 prepare_schedule_to (aTHX_ &ta, next);
1726}
1727
1728static int
1729api_cede (pTHX)
1730{
1731 struct coro_transfer_args ta;
1732
1733 prepare_cede (aTHX_ &ta);
1734
1735 if (expect_true (ta.prev != ta.next))
1736 {
1737 TRANSFER (ta, 1);
1738 return 1;
1739 }
1740 else
1741 return 0;
1742}
1743
1744static int
1745api_cede_notself (pTHX)
1746{
1747 if (coro_nready)
1748 {
1749 struct coro_transfer_args ta;
1750
1751 prepare_cede_notself (aTHX_ &ta);
1752 TRANSFER (ta, 1);
1753 return 1;
1754 }
1755 else
1756 return 0;
1757}
1758
1759static void
1760api_trace (pTHX_ SV *coro_sv, int flags)
1761{
1762 struct coro *coro = SvSTATE (coro_sv);
1763
1764 if (flags & CC_TRACE)
1765 {
1766 if (!coro->cctx)
1767 coro->cctx = cctx_new_run ();
1768 else if (!(coro->cctx->flags & CC_TRACE))
1769 croak ("cannot enable tracing on coroutine with custom stack,");
1770
1771 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1772 }
1773 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1774 {
1775 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1776
1777 if (coro->flags & CF_RUNNING)
1778 PL_runops = RUNOPS_DEFAULT;
1779 else
1780 coro->slot->runops = RUNOPS_DEFAULT;
1781 }
1782}
1783
1784static void
1785coro_call_on_destroy (pTHX_ struct coro *coro)
1786{
1787 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1788 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1789
1790 if (on_destroyp)
1791 {
1792 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1793
1794 while (AvFILLp (on_destroy) >= 0)
1795 {
1796 dSP; /* don't disturb outer sp */
1797 SV *cb = av_pop (on_destroy);
1798
1799 PUSHMARK (SP);
1800
1801 if (statusp)
1802 {
1803 int i;
1804 AV *status = (AV *)SvRV (*statusp);
1805 EXTEND (SP, AvFILLp (status) + 1);
1806
1807 for (i = 0; i <= AvFILLp (status); ++i)
1808 PUSHs (AvARRAY (status)[i]);
1809 }
1810
1811 PUTBACK;
1812 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1813 }
1814 }
1815}
1816
1817static void
1818slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1819{
1820 int i;
1821 HV *hv = (HV *)SvRV (coro_current);
1822 AV *av = newAV ();
1823
1824 av_extend (av, items - 1);
1825 for (i = 0; i < items; ++i)
1826 av_push (av, SvREFCNT_inc_NN (arg [i]));
1827
1828 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1829
1830 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1831 api_ready (aTHX_ sv_manager);
1832
1833 frame->prepare = prepare_schedule;
1834 frame->check = slf_check_repeat;
1835}
1836
1837/*****************************************************************************/
1838/* async pool handler */
1839
1840static int
1841slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1842{
1843 HV *hv = (HV *)SvRV (coro_current);
1844 struct coro *coro = (struct coro *)frame->data;
1845
1846 if (!coro->invoke_cb)
1847 return 1; /* loop till we have invoke */
1848 else
1849 {
1850 hv_store (hv, "desc", sizeof ("desc") - 1,
1851 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1852
1853 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1854
821 { 1855 {
822 coro_nready--; 1856 dSP;
823 return av_shift (coro_ready[prio]); 1857 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1858 PUTBACK;
824 } 1859 }
825 1860
1861 SvREFCNT_dec (GvAV (PL_defgv));
1862 GvAV (PL_defgv) = coro->invoke_av;
1863 coro->invoke_av = 0;
1864
1865 return 0;
1866 }
1867}
1868
1869static void
1870slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1871{
1872 HV *hv = (HV *)SvRV (coro_current);
1873 struct coro *coro = SvSTATE_hv ((SV *)hv);
1874
1875 if (expect_true (coro->saved_deffh))
1876 {
1877 /* subsequent iteration */
1878 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1879 coro->saved_deffh = 0;
1880
1881 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1882 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1883 {
1884 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1885 coro->invoke_av = newAV ();
1886
1887 frame->prepare = prepare_nop;
1888 }
1889 else
1890 {
1891 av_clear (GvAV (PL_defgv));
1892 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1893
1894 coro->prio = 0;
1895
1896 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1897 api_trace (aTHX_ coro_current, 0);
1898
1899 frame->prepare = prepare_schedule;
1900 av_push (av_async_pool, SvREFCNT_inc (hv));
1901 }
1902 }
1903 else
1904 {
1905 /* first iteration, simply fall through */
1906 frame->prepare = prepare_nop;
1907 }
1908
1909 frame->check = slf_check_pool_handler;
1910 frame->data = (void *)coro;
1911}
1912
1913/*****************************************************************************/
1914/* rouse callback */
1915
1916#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1917
1918static void
1919coro_rouse_callback (pTHX_ CV *cv)
1920{
1921 dXSARGS;
1922 SV *data = (SV *)GENSUB_ARG;
1923
1924 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1925 {
1926 /* first call, set args */
1927 AV *av = newAV ();
1928 SV *coro = SvRV (data);
1929
1930 SvRV_set (data, (SV *)av);
1931 api_ready (aTHX_ coro);
1932 SvREFCNT_dec (coro);
1933
1934 /* better take a full copy of the arguments */
1935 while (items--)
1936 av_store (av, items, newSVsv (ST (items)));
1937 }
1938
1939 XSRETURN_EMPTY;
1940}
1941
1942static int
1943slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1944{
1945 SV *data = (SV *)frame->data;
1946
1947 if (CORO_THROW)
1948 return 0;
1949
1950 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1951 return 1;
1952
1953 /* now push all results on the stack */
1954 {
1955 dSP;
1956 AV *av = (AV *)SvRV (data);
1957 int i;
1958
1959 EXTEND (SP, AvFILLp (av) + 1);
1960 for (i = 0; i <= AvFILLp (av); ++i)
1961 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1962
1963 /* we have stolen the elements, so ste length to zero and free */
1964 AvFILLp (av) = -1;
1965 av_undef (av);
1966
1967 PUTBACK;
1968 }
1969
826 return 0; 1970 return 0;
827} 1971}
828 1972
829static void 1973static void
830api_ready (SV *coro) 1974slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
831{ 1975{
832 coro_enq (SvREFCNT_inc (coro)); 1976 SV *cb;
833}
834 1977
835static void 1978 if (items)
836api_schedule (int cede) 1979 cb = arg [0];
837{ 1980 else
838 SV *prev, *next; 1981 {
1982 struct coro *coro = SvSTATE_current;
839 1983
840 prev = GvSV (coro_current); 1984 if (!coro->rouse_cb)
1985 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
841 1986
842 if (cede) 1987 cb = sv_2mortal (coro->rouse_cb);
843 coro_enq (SvREFCNT_inc (prev)); 1988 coro->rouse_cb = 0;
1989 }
844 1990
845 next = coro_deq (PRIO_MIN); 1991 if (!SvROK (cb)
1992 || SvTYPE (SvRV (cb)) != SVt_PVCV
1993 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1994 croak ("Coro::rouse_wait called with illegal callback argument,");
846 1995
847 if (!next) 1996 {
848 next = SvREFCNT_inc (GvSV (coro_idle)); 1997 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1998 SV *data = (SV *)GENSUB_ARG;
849 1999
850 GvSV (coro_current) = SvREFCNT_inc (next); 2000 frame->data = (void *)data;
851 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 2001 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
852 sv_to_coro (next, "Coro::schedule", "next coroutine"), 2002 frame->check = slf_check_rouse_wait;
853 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2003 }
2004}
2005
2006static SV *
2007coro_new_rouse_cb (pTHX)
2008{
2009 HV *hv = (HV *)SvRV (coro_current);
2010 struct coro *coro = SvSTATE_hv (hv);
2011 SV *data = newRV_inc ((SV *)hv);
2012 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2013
2014 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2015 SvREFCNT_dec (data); /* magicext increases the refcount */
2016
2017 SvREFCNT_dec (coro->rouse_cb);
2018 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2019
2020 return cb;
2021}
2022
2023/*****************************************************************************/
2024/* schedule-like-function opcode (SLF) */
2025
2026static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2027static const CV *slf_cv;
2028static SV **slf_argv;
2029static int slf_argc, slf_arga; /* count, allocated */
2030static I32 slf_ax; /* top of stack, for restore */
2031
2032/* this restores the stack in the case we patched the entersub, to */
2033/* recreate the stack frame as perl will on following calls */
2034/* since entersub cleared the stack */
2035static OP *
2036pp_restore (pTHX)
2037{
2038 int i;
2039 SV **SP = PL_stack_base + slf_ax;
2040
2041 PUSHMARK (SP);
2042
2043 EXTEND (SP, slf_argc + 1);
2044
2045 for (i = 0; i < slf_argc; ++i)
2046 PUSHs (sv_2mortal (slf_argv [i]));
2047
2048 PUSHs ((SV *)CvGV (slf_cv));
2049
2050 RETURNOP (slf_restore.op_first);
2051}
2052
2053static void
2054slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2055{
2056 SV **arg = (SV **)slf_frame.data;
2057
2058 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2059}
2060
2061static void
2062slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2063{
2064 if (items != 2)
2065 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2066
2067 frame->prepare = slf_prepare_transfer;
2068 frame->check = slf_check_nop;
2069 frame->data = (void *)arg; /* let's hope it will stay valid */
2070}
2071
2072static void
2073slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2074{
2075 frame->prepare = prepare_schedule;
2076 frame->check = slf_check_nop;
2077}
2078
2079static void
2080slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2081{
2082 struct coro *next = (struct coro *)slf_frame.data;
2083
854 SvREFCNT_dec (next); 2084 SvREFCNT_inc_NN (next->hv);
2085 prepare_schedule_to (aTHX_ ta, next);
2086}
2087
2088static void
2089slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2090{
2091 if (!items)
2092 croak ("Coro::schedule_to expects a coroutine argument, caught");
2093
2094 frame->data = (void *)SvSTATE (arg [0]);
2095 frame->prepare = slf_prepare_schedule_to;
2096 frame->check = slf_check_nop;
2097}
2098
2099static void
2100slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2101{
2102 api_ready (aTHX_ SvRV (coro_current));
2103
2104 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2105}
2106
2107static void
2108slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2109{
2110 frame->prepare = prepare_cede;
2111 frame->check = slf_check_nop;
2112}
2113
2114static void
2115slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2116{
2117 frame->prepare = prepare_cede_notself;
2118 frame->check = slf_check_nop;
2119}
2120
2121/*
2122 * these not obviously related functions are all rolled into one
2123 * function to increase chances that they all will call transfer with the same
2124 * stack offset
2125 * SLF stands for "schedule-like-function".
2126 */
2127static OP *
2128pp_slf (pTHX)
2129{
2130 I32 checkmark; /* mark SP to see how many elements check has pushed */
2131
2132 /* set up the slf frame, unless it has already been set-up */
2133 /* the latter happens when a new coro has been started */
2134 /* or when a new cctx was attached to an existing coroutine */
2135 if (expect_true (!slf_frame.prepare))
2136 {
2137 /* first iteration */
2138 dSP;
2139 SV **arg = PL_stack_base + TOPMARK + 1;
2140 int items = SP - arg; /* args without function object */
2141 SV *gv = *sp;
2142
2143 /* do a quick consistency check on the "function" object, and if it isn't */
2144 /* for us, divert to the real entersub */
2145 if (SvTYPE (gv) != SVt_PVGV
2146 || !GvCV (gv)
2147 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2148 return PL_ppaddr[OP_ENTERSUB](aTHX);
2149
2150 if (!(PL_op->op_flags & OPf_STACKED))
2151 {
2152 /* ampersand-form of call, use @_ instead of stack */
2153 AV *av = GvAV (PL_defgv);
2154 arg = AvARRAY (av);
2155 items = AvFILLp (av) + 1;
2156 }
2157
2158 /* now call the init function, which needs to set up slf_frame */
2159 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2160 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2161
2162 /* pop args */
2163 SP = PL_stack_base + POPMARK;
2164
2165 PUTBACK;
2166 }
2167
2168 /* now that we have a slf_frame, interpret it! */
2169 /* we use a callback system not to make the code needlessly */
2170 /* complicated, but so we can run multiple perl coros from one cctx */
2171
2172 do
2173 {
2174 struct coro_transfer_args ta;
2175
2176 slf_frame.prepare (aTHX_ &ta);
2177 TRANSFER (ta, 0);
2178
2179 checkmark = PL_stack_sp - PL_stack_base;
2180 }
2181 while (slf_frame.check (aTHX_ &slf_frame));
2182
2183 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2184
2185 /* exception handling */
2186 if (expect_false (CORO_THROW))
2187 {
2188 SV *exception = sv_2mortal (CORO_THROW);
2189
2190 CORO_THROW = 0;
2191 sv_setsv (ERRSV, exception);
2192 croak (0);
2193 }
2194
2195 /* return value handling - mostly like entersub */
2196 /* make sure we put something on the stack in scalar context */
2197 if (GIMME_V == G_SCALAR)
2198 {
2199 dSP;
2200 SV **bot = PL_stack_base + checkmark;
2201
2202 if (sp == bot) /* too few, push undef */
2203 bot [1] = &PL_sv_undef;
2204 else if (sp != bot + 1) /* too many, take last one */
2205 bot [1] = *sp;
2206
2207 SP = bot + 1;
2208
2209 PUTBACK;
2210 }
2211
2212 return NORMAL;
2213}
2214
2215static void
2216api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2217{
2218 int i;
2219 SV **arg = PL_stack_base + ax;
2220 int items = PL_stack_sp - arg + 1;
2221
2222 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2223
2224 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2225 && PL_op->op_ppaddr != pp_slf)
2226 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2227
2228 CvFLAGS (cv) |= CVf_SLF;
2229 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2230 slf_cv = cv;
2231
2232 /* we patch the op, and then re-run the whole call */
2233 /* we have to put the same argument on the stack for this to work */
2234 /* and this will be done by pp_restore */
2235 slf_restore.op_next = (OP *)&slf_restore;
2236 slf_restore.op_type = OP_CUSTOM;
2237 slf_restore.op_ppaddr = pp_restore;
2238 slf_restore.op_first = PL_op;
2239
2240 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2241
2242 if (PL_op->op_flags & OPf_STACKED)
2243 {
2244 if (items > slf_arga)
2245 {
2246 slf_arga = items;
2247 free (slf_argv);
2248 slf_argv = malloc (slf_arga * sizeof (SV *));
2249 }
2250
2251 slf_argc = items;
2252
2253 for (i = 0; i < items; ++i)
2254 slf_argv [i] = SvREFCNT_inc (arg [i]);
2255 }
2256 else
2257 slf_argc = 0;
2258
2259 PL_op->op_ppaddr = pp_slf;
2260 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2261
2262 PL_op = (OP *)&slf_restore;
2263}
2264
2265/*****************************************************************************/
2266/* PerlIO::cede */
2267
2268typedef struct
2269{
2270 PerlIOBuf base;
2271 NV next, every;
2272} PerlIOCede;
2273
2274static IV
2275PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2276{
2277 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2278
2279 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2280 self->next = nvtime () + self->every;
2281
2282 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2283}
2284
2285static SV *
2286PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2287{
2288 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2289
2290 return newSVnv (self->every);
2291}
2292
2293static IV
2294PerlIOCede_flush (pTHX_ PerlIO *f)
2295{
2296 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2297 double now = nvtime ();
2298
2299 if (now >= self->next)
2300 {
2301 api_cede (aTHX);
2302 self->next = now + self->every;
2303 }
2304
2305 return PerlIOBuf_flush (aTHX_ f);
2306}
2307
2308static PerlIO_funcs PerlIO_cede =
2309{
2310 sizeof(PerlIO_funcs),
2311 "cede",
2312 sizeof(PerlIOCede),
2313 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2314 PerlIOCede_pushed,
2315 PerlIOBuf_popped,
2316 PerlIOBuf_open,
2317 PerlIOBase_binmode,
2318 PerlIOCede_getarg,
2319 PerlIOBase_fileno,
2320 PerlIOBuf_dup,
2321 PerlIOBuf_read,
2322 PerlIOBuf_unread,
2323 PerlIOBuf_write,
2324 PerlIOBuf_seek,
2325 PerlIOBuf_tell,
2326 PerlIOBuf_close,
2327 PerlIOCede_flush,
2328 PerlIOBuf_fill,
2329 PerlIOBase_eof,
2330 PerlIOBase_error,
2331 PerlIOBase_clearerr,
2332 PerlIOBase_setlinebuf,
2333 PerlIOBuf_get_base,
2334 PerlIOBuf_bufsiz,
2335 PerlIOBuf_get_ptr,
2336 PerlIOBuf_get_cnt,
2337 PerlIOBuf_set_ptrcnt,
2338};
2339
2340/*****************************************************************************/
2341/* Coro::Semaphore & Coro::Signal */
2342
2343static SV *
2344coro_waitarray_new (pTHX_ int count)
2345{
2346 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2347 AV *av = newAV ();
2348 SV **ary;
2349
2350 /* unfortunately, building manually saves memory */
2351 Newx (ary, 2, SV *);
2352 AvALLOC (av) = ary;
2353 /*AvARRAY (av) = ary;*/
2354 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2355 AvMAX (av) = 1;
2356 AvFILLp (av) = 0;
2357 ary [0] = newSViv (count);
2358
2359 return newRV_noinc ((SV *)av);
2360}
2361
2362/* semaphore */
2363
2364static void
2365coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2366{
2367 SV *count_sv = AvARRAY (av)[0];
2368 IV count = SvIVX (count_sv);
2369
2370 count += adjust;
2371 SvIVX (count_sv) = count;
2372
2373 /* now wake up as many waiters as are expected to lock */
2374 while (count > 0 && AvFILLp (av) > 0)
2375 {
2376 SV *cb;
2377
2378 /* swap first two elements so we can shift a waiter */
2379 AvARRAY (av)[0] = AvARRAY (av)[1];
2380 AvARRAY (av)[1] = count_sv;
2381 cb = av_shift (av);
2382
2383 if (SvOBJECT (cb))
2384 {
2385 api_ready (aTHX_ cb);
2386 --count;
2387 }
2388 else if (SvTYPE (cb) == SVt_PVCV)
2389 {
2390 dSP;
2391 PUSHMARK (SP);
2392 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2393 PUTBACK;
2394 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2395 }
2396
2397 SvREFCNT_dec (cb);
2398 }
2399}
2400
2401static void
2402coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2403{
2404 /* call $sem->adjust (0) to possibly wake up some other waiters */
2405 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2406}
2407
2408static int
2409slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2410{
2411 AV *av = (AV *)frame->data;
2412 SV *count_sv = AvARRAY (av)[0];
2413
2414 /* if we are about to throw, don't actually acquire the lock, just throw */
2415 if (CORO_THROW)
2416 return 0;
2417 else if (SvIVX (count_sv) > 0)
2418 {
2419 SvSTATE_current->on_destroy = 0;
2420
2421 if (acquire)
2422 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2423 else
2424 coro_semaphore_adjust (aTHX_ av, 0);
2425
2426 return 0;
2427 }
2428 else
2429 {
2430 int i;
2431 /* if we were woken up but can't down, we look through the whole */
2432 /* waiters list and only add us if we aren't in there already */
2433 /* this avoids some degenerate memory usage cases */
2434
2435 for (i = 1; i <= AvFILLp (av); ++i)
2436 if (AvARRAY (av)[i] == SvRV (coro_current))
2437 return 1;
2438
2439 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2440 return 1;
2441 }
2442}
2443
2444static int
2445slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2446{
2447 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2448}
2449
2450static int
2451slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2452{
2453 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2454}
2455
2456static void
2457slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2458{
2459 AV *av = (AV *)SvRV (arg [0]);
2460
2461 if (SvIVX (AvARRAY (av)[0]) > 0)
2462 {
2463 frame->data = (void *)av;
2464 frame->prepare = prepare_nop;
2465 }
2466 else
2467 {
2468 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2469
2470 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2471 frame->prepare = prepare_schedule;
2472
2473 /* to avoid race conditions when a woken-up coro gets terminated */
2474 /* we arrange for a temporary on_destroy that calls adjust (0) */
2475 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2476 }
2477}
2478
2479static void
2480slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2481{
2482 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2483 frame->check = slf_check_semaphore_down;
2484}
2485
2486static void
2487slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2488{
2489 if (items >= 2)
2490 {
2491 /* callback form */
2492 AV *av = (AV *)SvRV (arg [0]);
2493 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2494
2495 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2496
2497 if (SvIVX (AvARRAY (av)[0]) > 0)
2498 coro_semaphore_adjust (aTHX_ av, 0);
2499
2500 frame->prepare = prepare_nop;
2501 frame->check = slf_check_nop;
2502 }
2503 else
2504 {
2505 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2506 frame->check = slf_check_semaphore_wait;
2507 }
2508}
2509
2510/* signal */
2511
2512static void
2513coro_signal_wake (pTHX_ AV *av, int count)
2514{
2515 SvIVX (AvARRAY (av)[0]) = 0;
2516
2517 /* now signal count waiters */
2518 while (count > 0 && AvFILLp (av) > 0)
2519 {
2520 SV *cb;
2521
2522 /* swap first two elements so we can shift a waiter */
2523 cb = AvARRAY (av)[0];
2524 AvARRAY (av)[0] = AvARRAY (av)[1];
2525 AvARRAY (av)[1] = cb;
2526
2527 cb = av_shift (av);
2528
2529 api_ready (aTHX_ cb);
2530 sv_setiv (cb, 0); /* signal waiter */
2531 SvREFCNT_dec (cb);
2532
2533 --count;
2534 }
2535}
2536
2537static int
2538slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2539{
2540 /* if we are about to throw, also stop waiting */
2541 return SvROK ((SV *)frame->data) && !CORO_THROW;
2542}
2543
2544static void
2545slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2546{
2547 AV *av = (AV *)SvRV (arg [0]);
2548
2549 if (SvIVX (AvARRAY (av)[0]))
2550 {
2551 SvIVX (AvARRAY (av)[0]) = 0;
2552 frame->prepare = prepare_nop;
2553 frame->check = slf_check_nop;
2554 }
2555 else
2556 {
2557 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2558
2559 av_push (av, waiter);
2560
2561 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2562 frame->prepare = prepare_schedule;
2563 frame->check = slf_check_signal_wait;
2564 }
2565}
2566
2567/*****************************************************************************/
2568/* Coro::AIO */
2569
2570#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2571
2572/* helper storage struct */
2573struct io_state
2574{
2575 int errorno;
2576 I32 laststype; /* U16 in 5.10.0 */
2577 int laststatval;
2578 Stat_t statcache;
2579};
2580
2581static void
2582coro_aio_callback (pTHX_ CV *cv)
2583{
2584 dXSARGS;
2585 AV *state = (AV *)GENSUB_ARG;
2586 SV *coro = av_pop (state);
2587 SV *data_sv = newSV (sizeof (struct io_state));
2588
2589 av_extend (state, items - 1);
2590
2591 sv_upgrade (data_sv, SVt_PV);
2592 SvCUR_set (data_sv, sizeof (struct io_state));
2593 SvPOK_only (data_sv);
2594
2595 {
2596 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2597
2598 data->errorno = errno;
2599 data->laststype = PL_laststype;
2600 data->laststatval = PL_laststatval;
2601 data->statcache = PL_statcache;
2602 }
2603
2604 /* now build the result vector out of all the parameters and the data_sv */
2605 {
2606 int i;
2607
2608 for (i = 0; i < items; ++i)
2609 av_push (state, SvREFCNT_inc_NN (ST (i)));
2610 }
2611
2612 av_push (state, data_sv);
2613
2614 api_ready (aTHX_ coro);
855 SvREFCNT_dec (prev); 2615 SvREFCNT_dec (coro);
2616 SvREFCNT_dec ((AV *)state);
856} 2617}
857 2618
2619static int
2620slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2621{
2622 AV *state = (AV *)frame->data;
2623
2624 /* if we are about to throw, return early */
2625 /* this does not cancel the aio request, but at least */
2626 /* it quickly returns */
2627 if (CORO_THROW)
2628 return 0;
2629
2630 /* one element that is an RV? repeat! */
2631 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2632 return 1;
2633
2634 /* restore status */
2635 {
2636 SV *data_sv = av_pop (state);
2637 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2638
2639 errno = data->errorno;
2640 PL_laststype = data->laststype;
2641 PL_laststatval = data->laststatval;
2642 PL_statcache = data->statcache;
2643
2644 SvREFCNT_dec (data_sv);
2645 }
2646
2647 /* push result values */
2648 {
2649 dSP;
2650 int i;
2651
2652 EXTEND (SP, AvFILLp (state) + 1);
2653 for (i = 0; i <= AvFILLp (state); ++i)
2654 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2655
2656 PUTBACK;
2657 }
2658
2659 return 0;
2660}
2661
2662static void
2663slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2664{
2665 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2666 SV *coro_hv = SvRV (coro_current);
2667 struct coro *coro = SvSTATE_hv (coro_hv);
2668
2669 /* put our coroutine id on the state arg */
2670 av_push (state, SvREFCNT_inc_NN (coro_hv));
2671
2672 /* first see whether we have a non-zero priority and set it as AIO prio */
2673 if (coro->prio)
2674 {
2675 dSP;
2676
2677 static SV *prio_cv;
2678 static SV *prio_sv;
2679
2680 if (expect_false (!prio_cv))
2681 {
2682 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2683 prio_sv = newSViv (0);
2684 }
2685
2686 PUSHMARK (SP);
2687 sv_setiv (prio_sv, coro->prio);
2688 XPUSHs (prio_sv);
2689
2690 PUTBACK;
2691 call_sv (prio_cv, G_VOID | G_DISCARD);
2692 }
2693
2694 /* now call the original request */
2695 {
2696 dSP;
2697 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2698 int i;
2699
2700 PUSHMARK (SP);
2701
2702 /* first push all args to the stack */
2703 EXTEND (SP, items + 1);
2704
2705 for (i = 0; i < items; ++i)
2706 PUSHs (arg [i]);
2707
2708 /* now push the callback closure */
2709 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2710
2711 /* now call the AIO function - we assume our request is uncancelable */
2712 PUTBACK;
2713 call_sv ((SV *)req, G_VOID | G_DISCARD);
2714 }
2715
2716 /* now that the requets is going, we loop toll we have a result */
2717 frame->data = (void *)state;
2718 frame->prepare = prepare_schedule;
2719 frame->check = slf_check_aio_req;
2720}
2721
2722static void
2723coro_aio_req_xs (pTHX_ CV *cv)
2724{
2725 dXSARGS;
2726
2727 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2728
2729 XSRETURN_EMPTY;
2730}
2731
2732/*****************************************************************************/
2733
2734#if CORO_CLONE
2735# include "clone.c"
2736#endif
2737
858MODULE = Coro::State PACKAGE = Coro::State 2738MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
859 2739
860PROTOTYPES: ENABLE 2740PROTOTYPES: DISABLE
861 2741
862BOOT: 2742BOOT:
863{ /* {} necessary for stoopid perl-5.6.x */ 2743{
864 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2744#ifdef USE_ITHREADS
865 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2745# if CORO_PTHREAD
2746 coro_thx = PERL_GET_CONTEXT;
2747# endif
2748#endif
2749 BOOT_PAGESIZE;
2750
2751 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2752 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2753
2754 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2755 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2756 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2757
2758 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2759 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2760 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2761
866 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2762 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
867 2763
868 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2764 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
869 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2765 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
870 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2766 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
871 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2767 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
872
873 if (!padlist_cache)
874 padlist_cache = newHV ();
875 2768
876 main_mainstack = PL_mainstack; 2769 main_mainstack = PL_mainstack;
2770 main_top_env = PL_top_env;
877 2771
2772 while (main_top_env->je_prev)
2773 main_top_env = main_top_env->je_prev;
2774
2775 {
2776 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2777
2778 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2779 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2780
2781 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2782 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2783 }
2784
878 coroapi.ver = CORO_API_VERSION; 2785 coroapi.ver = CORO_API_VERSION;
2786 coroapi.rev = CORO_API_REVISION;
2787
879 coroapi.transfer = api_transfer; 2788 coroapi.transfer = api_transfer;
880}
881 2789
882Coro::State 2790 coroapi.sv_state = SvSTATE_;
883_newprocess(args) 2791 coroapi.execute_slf = api_execute_slf;
884 SV * args 2792 coroapi.prepare_nop = prepare_nop;
885 PROTOTYPE: $ 2793 coroapi.prepare_schedule = prepare_schedule;
2794 coroapi.prepare_cede = prepare_cede;
2795 coroapi.prepare_cede_notself = prepare_cede_notself;
2796
2797 {
2798 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2799
2800 if (!svp) croak ("Time::HiRes is required");
2801 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2802
2803 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2804 }
2805
2806 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2807}
2808
2809SV *
2810new (char *klass, ...)
2811 ALIAS:
2812 Coro::new = 1
886 CODE: 2813 CODE:
887 Coro__State coro; 2814{
2815 struct coro *coro;
2816 MAGIC *mg;
2817 HV *hv;
2818 CV *cb;
2819 int i;
888 2820
889 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2821 if (items > 1)
890 croak ("Coro::State::_newprocess expects an arrayref");
891 2822 {
2823 cb = coro_sv_2cv (aTHX_ ST (1));
2824
2825 if (!ix)
2826 {
2827 if (CvISXSUB (cb))
2828 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2829
2830 if (!CvROOT (cb))
2831 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2832 }
2833 }
2834
892 New (0, coro, 1, struct coro); 2835 Newz (0, coro, 1, struct coro);
2836 coro->args = newAV ();
2837 coro->flags = CF_NEW;
893 2838
894 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2839 if (coro_first) coro_first->prev = coro;
895 coro->mainstack = 0; /* actual work is done inside transfer */ 2840 coro->next = coro_first;
896 coro->stack = 0; 2841 coro_first = coro;
897 2842
898 RETVAL = coro; 2843 coro->hv = hv = newHV ();
2844 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2845 mg->mg_flags |= MGf_DUP;
2846 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2847
2848 if (items > 1)
2849 {
2850 av_extend (coro->args, items - 1 + ix - 1);
2851
2852 if (ix)
2853 {
2854 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2855 cb = cv_coro_run;
2856 }
2857
2858 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2859
2860 for (i = 2; i < items; i++)
2861 av_push (coro->args, newSVsv (ST (i)));
2862 }
2863}
899 OUTPUT: 2864 OUTPUT:
900 RETVAL 2865 RETVAL
901 2866
902void 2867void
903transfer(prev, next, flags) 2868transfer (...)
904 Coro::State_or_hashref prev
905 Coro::State_or_hashref next
906 int flags
907 PROTOTYPE: @ 2869 PROTOTYPE: $$
908 CODE: 2870 CODE:
909 PUTBACK; 2871 CORO_EXECUTE_SLF_XS (slf_init_transfer);
910 transfer (aTHX_ prev, next, flags); 2872
911 SPAGAIN; 2873bool
2874_destroy (SV *coro_sv)
2875 CODE:
2876 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2877 OUTPUT:
2878 RETVAL
912 2879
913void 2880void
914DESTROY(coro) 2881_exit (int code)
915 Coro::State coro 2882 PROTOTYPE: $
916 CODE: 2883 CODE:
2884 _exit (code);
917 2885
918 if (coro->mainstack && coro->mainstack != main_mainstack) 2886#if CORO_CLONE
2887
2888SV *
2889clone (Coro::State coro)
2890 CODE:
2891{
2892 struct coro *ncoro = coro_clone (coro);
2893 MAGIC *mg;
2894 /* TODO: too much duplication */
2895 ncoro->hv = newHV ();
2896 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2897 mg->mg_flags |= MGf_DUP;
2898 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2899}
2900 OUTPUT:
2901 RETVAL
2902
2903#endif
2904
2905int
2906cctx_stacksize (int new_stacksize = 0)
2907 PROTOTYPE: ;$
2908 CODE:
2909 RETVAL = cctx_stacksize;
2910 if (new_stacksize)
2911 {
2912 cctx_stacksize = new_stacksize;
2913 ++cctx_gen;
2914 }
2915 OUTPUT:
2916 RETVAL
2917
2918int
2919cctx_max_idle (int max_idle = 0)
2920 PROTOTYPE: ;$
2921 CODE:
2922 RETVAL = cctx_max_idle;
2923 if (max_idle > 1)
2924 cctx_max_idle = max_idle;
2925 OUTPUT:
2926 RETVAL
2927
2928int
2929cctx_count ()
2930 PROTOTYPE:
2931 CODE:
2932 RETVAL = cctx_count;
2933 OUTPUT:
2934 RETVAL
2935
2936int
2937cctx_idle ()
2938 PROTOTYPE:
2939 CODE:
2940 RETVAL = cctx_idle;
2941 OUTPUT:
2942 RETVAL
2943
2944void
2945list ()
2946 PROTOTYPE:
2947 PPCODE:
2948{
2949 struct coro *coro;
2950 for (coro = coro_first; coro; coro = coro->next)
2951 if (coro->hv)
2952 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2953}
2954
2955void
2956call (Coro::State coro, SV *coderef)
2957 ALIAS:
2958 eval = 1
2959 CODE:
2960{
2961 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
919 { 2962 {
920 struct coro temp; 2963 struct coro temp;
921 2964
922 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2965 if (!(coro->flags & CF_RUNNING))
923 LOAD(aTHX_ coro); 2966 {
2967 PUTBACK;
2968 save_perl (aTHX_ &temp);
2969 load_perl (aTHX_ coro);
2970 }
924 2971
925 destroy_stacks (aTHX); 2972 {
2973 dSP;
2974 ENTER;
2975 SAVETMPS;
2976 PUTBACK;
2977 PUSHSTACK;
2978 PUSHMARK (SP);
926 2979
927 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2980 if (ix)
2981 eval_sv (coderef, 0);
2982 else
2983 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
928 2984
929 coro->mainstack = 0; 2985 POPSTACK;
2986 SPAGAIN;
2987 FREETMPS;
2988 LEAVE;
2989 PUTBACK;
2990 }
2991
2992 if (!(coro->flags & CF_RUNNING))
2993 {
2994 save_perl (aTHX_ coro);
2995 load_perl (aTHX_ &temp);
2996 SPAGAIN;
2997 }
930 } 2998 }
2999}
931 3000
932 deallocate_stack (coro); 3001SV *
933 3002is_ready (Coro::State coro)
934 Safefree (coro); 3003 PROTOTYPE: $
3004 ALIAS:
3005 is_ready = CF_READY
3006 is_running = CF_RUNNING
3007 is_new = CF_NEW
3008 is_destroyed = CF_DESTROYED
3009 CODE:
3010 RETVAL = boolSV (coro->flags & ix);
3011 OUTPUT:
3012 RETVAL
935 3013
936void 3014void
937flush() 3015throw (Coro::State self, SV *throw = &PL_sv_undef)
938 CODE: 3016 PROTOTYPE: $;$
939#ifdef MAY_FLUSH 3017 CODE:
940 flush_padlist_cache (); 3018{
941#endif 3019 struct coro *current = SvSTATE_current;
3020 SV **throwp = self == current ? &CORO_THROW : &self->except;
3021 SvREFCNT_dec (*throwp);
3022 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3023}
942 3024
943void 3025void
944_exit(code) 3026api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
945 int code 3027 PROTOTYPE: $;$
3028 C_ARGS: aTHX_ coro, flags
3029
3030SV *
3031has_cctx (Coro::State coro)
946 PROTOTYPE: $ 3032 PROTOTYPE: $
947 CODE: 3033 CODE:
948#if defined(__GLIBC__) || _POSIX_C_SOURCE 3034 RETVAL = boolSV (!!coro->cctx);
949 _exit (code); 3035 OUTPUT:
950#else 3036 RETVAL
951 signal (SIGTERM, SIG_DFL);
952 raise (SIGTERM);
953 exit (code);
954#endif
955 3037
956MODULE = Coro::State PACKAGE = Coro::Cont 3038int
3039is_traced (Coro::State coro)
3040 PROTOTYPE: $
3041 CODE:
3042 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3043 OUTPUT:
3044 RETVAL
957 3045
958# this is slightly dirty (should expose a c-level api) 3046UV
3047rss (Coro::State coro)
3048 PROTOTYPE: $
3049 ALIAS:
3050 usecount = 1
3051 CODE:
3052 switch (ix)
3053 {
3054 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3055 case 1: RETVAL = coro->usecount; break;
3056 }
3057 OUTPUT:
3058 RETVAL
959 3059
960void 3060void
961yield(...) 3061force_cctx ()
3062 PROTOTYPE:
3063 CODE:
3064 SvSTATE_current->cctx->idle_sp = 0;
3065
3066void
3067swap_defsv (Coro::State self)
962 PROTOTYPE: @ 3068 PROTOTYPE: $
3069 ALIAS:
3070 swap_defav = 1
963 CODE: 3071 CODE:
964 static SV *returnstk; 3072 if (!self->slot)
965 SV *sv; 3073 croak ("cannot swap state with coroutine that has no saved state,");
966 AV *defav = GvAV (PL_defgv); 3074 else
967 struct coro *prev, *next; 3075 {
3076 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3077 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
968 3078
969 if (!returnstk) 3079 SV *tmp = *src; *src = *dst; *dst = tmp;
970 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 3080 }
971 3081
972 /* set up @_ -- ugly */
973 av_clear (defav);
974 av_fill (defav, items - 1);
975 while (items--)
976 av_store (defav, items, SvREFCNT_inc (ST(items)));
977
978 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
979 sv = av_pop ((AV *)SvRV (returnstk));
980 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
981 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
982 SvREFCNT_dec (sv);
983
984 transfer(aTHX_ prev, next, 0);
985 3082
986MODULE = Coro::State PACKAGE = Coro 3083MODULE = Coro::State PACKAGE = Coro
987 3084
988# this is slightly dirty (should expose a c-level api)
989
990BOOT: 3085BOOT:
991{ 3086{
992 int i; 3087 int i;
3088
3089 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3090 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3091 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3092 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3093 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3094 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3095 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3096 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3097
3098 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3099 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3100 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3101 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3102
993 HV *stash = gv_stashpv ("Coro", TRUE); 3103 coro_stash = gv_stashpv ("Coro", TRUE);
994 3104
995 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3105 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
996 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3106 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
997 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3107 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
998 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3108 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
999 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3109 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1000 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3110 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1001
1002 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1003 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1004 3111
1005 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3112 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1006 coro_ready[i] = newAV (); 3113 coro_ready[i] = newAV ();
1007 3114
1008 { 3115 {
1009 SV *sv = perl_get_sv("Coro::API", 1); 3116 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1010 3117
1011 coroapi.schedule = api_schedule; 3118 coroapi.schedule = api_schedule;
3119 coroapi.schedule_to = api_schedule_to;
3120 coroapi.cede = api_cede;
3121 coroapi.cede_notself = api_cede_notself;
1012 coroapi.ready = api_ready; 3122 coroapi.ready = api_ready;
3123 coroapi.is_ready = api_is_ready;
1013 coroapi.nready = &coro_nready; 3124 coroapi.nready = coro_nready;
1014 coroapi.current = coro_current; 3125 coroapi.current = coro_current;
1015 3126
1016 GCoroAPI = &coroapi; 3127 /*GCoroAPI = &coroapi;*/
1017 sv_setiv(sv, (IV)&coroapi); 3128 sv_setiv (sv, (IV)&coroapi);
1018 SvREADONLY_on(sv); 3129 SvREADONLY_on (sv);
1019 } 3130 }
1020} 3131}
1021 3132
1022void 3133void
1023ready(self) 3134terminate (...)
1024 SV * self
1025 CODE: 3135 CODE:
1026 api_ready (self); 3136 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3137
3138void
3139schedule (...)
3140 CODE:
3141 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3142
3143void
3144schedule_to (...)
3145 CODE:
3146 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3147
3148void
3149cede_to (...)
3150 CODE:
3151 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3152
3153void
3154cede (...)
3155 CODE:
3156 CORO_EXECUTE_SLF_XS (slf_init_cede);
3157
3158void
3159cede_notself (...)
3160 CODE:
3161 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3162
3163void
3164_cancel (Coro::State self)
3165 CODE:
3166 coro_state_destroy (aTHX_ self);
3167 coro_call_on_destroy (aTHX_ self);
3168
3169void
3170_set_current (SV *current)
3171 PROTOTYPE: $
3172 CODE:
3173 SvREFCNT_dec (SvRV (coro_current));
3174 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3175
3176void
3177_set_readyhook (SV *hook)
3178 PROTOTYPE: $
3179 CODE:
3180 SvREFCNT_dec (coro_readyhook);
3181 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1027 3182
1028int 3183int
3184prio (Coro::State coro, int newprio = 0)
3185 PROTOTYPE: $;$
3186 ALIAS:
3187 nice = 1
3188 CODE:
3189{
3190 RETVAL = coro->prio;
3191
3192 if (items > 1)
3193 {
3194 if (ix)
3195 newprio = coro->prio - newprio;
3196
3197 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3198 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3199
3200 coro->prio = newprio;
3201 }
3202}
3203 OUTPUT:
3204 RETVAL
3205
3206SV *
3207ready (SV *self)
3208 PROTOTYPE: $
3209 CODE:
3210 RETVAL = boolSV (api_ready (aTHX_ self));
3211 OUTPUT:
3212 RETVAL
3213
3214int
1029nready(...) 3215nready (...)
1030 PROTOTYPE: 3216 PROTOTYPE:
1031 CODE: 3217 CODE:
1032 RETVAL = coro_nready; 3218 RETVAL = coro_nready;
1033 OUTPUT: 3219 OUTPUT:
1034 RETVAL 3220 RETVAL
1035 3221
1036void 3222void
1037schedule(...) 3223_pool_handler (...)
1038 PROTOTYPE:
1039 ALIAS:
1040 cede = 1
1041 CODE: 3224 CODE:
1042 api_schedule (ix); 3225 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1043 3226
3227void
3228async_pool (SV *cv, ...)
3229 PROTOTYPE: &@
3230 PPCODE:
3231{
3232 HV *hv = (HV *)av_pop (av_async_pool);
3233 AV *av = newAV ();
3234 SV *cb = ST (0);
3235 int i;
3236
3237 av_extend (av, items - 2);
3238 for (i = 1; i < items; ++i)
3239 av_push (av, SvREFCNT_inc_NN (ST (i)));
3240
3241 if ((SV *)hv == &PL_sv_undef)
3242 {
3243 PUSHMARK (SP);
3244 EXTEND (SP, 2);
3245 PUSHs (sv_Coro);
3246 PUSHs ((SV *)cv_pool_handler);
3247 PUTBACK;
3248 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3249 SPAGAIN;
3250
3251 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3252 }
3253
3254 {
3255 struct coro *coro = SvSTATE_hv (hv);
3256
3257 assert (!coro->invoke_cb);
3258 assert (!coro->invoke_av);
3259 coro->invoke_cb = SvREFCNT_inc (cb);
3260 coro->invoke_av = av;
3261 }
3262
3263 api_ready (aTHX_ (SV *)hv);
3264
3265 if (GIMME_V != G_VOID)
3266 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3267 else
3268 SvREFCNT_dec (hv);
3269}
3270
3271SV *
3272rouse_cb ()
3273 PROTOTYPE:
3274 CODE:
3275 RETVAL = coro_new_rouse_cb (aTHX);
3276 OUTPUT:
3277 RETVAL
3278
3279void
3280rouse_wait (...)
3281 PROTOTYPE: ;$
3282 PPCODE:
3283 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3284
3285
3286MODULE = Coro::State PACKAGE = PerlIO::cede
3287
3288BOOT:
3289 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3290
3291
3292MODULE = Coro::State PACKAGE = Coro::Semaphore
3293
3294SV *
3295new (SV *klass, SV *count = 0)
3296 CODE:
3297 RETVAL = sv_bless (
3298 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3299 GvSTASH (CvGV (cv))
3300 );
3301 OUTPUT:
3302 RETVAL
3303
3304# helper for Coro::Channel
3305SV *
3306_alloc (int count)
3307 CODE:
3308 RETVAL = coro_waitarray_new (aTHX_ count);
3309 OUTPUT:
3310 RETVAL
3311
3312SV *
3313count (SV *self)
3314 CODE:
3315 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3316 OUTPUT:
3317 RETVAL
3318
3319void
3320up (SV *self, int adjust = 1)
3321 ALIAS:
3322 adjust = 1
3323 CODE:
3324 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3325
3326void
3327down (...)
3328 CODE:
3329 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3330
3331void
3332wait (...)
3333 CODE:
3334 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3335
3336void
3337try (SV *self)
3338 PPCODE:
3339{
3340 AV *av = (AV *)SvRV (self);
3341 SV *count_sv = AvARRAY (av)[0];
3342 IV count = SvIVX (count_sv);
3343
3344 if (count > 0)
3345 {
3346 --count;
3347 SvIVX (count_sv) = count;
3348 XSRETURN_YES;
3349 }
3350 else
3351 XSRETURN_NO;
3352}
3353
3354void
3355waiters (SV *self)
3356 PPCODE:
3357{
3358 AV *av = (AV *)SvRV (self);
3359 int wcount = AvFILLp (av) + 1 - 1;
3360
3361 if (GIMME_V == G_SCALAR)
3362 XPUSHs (sv_2mortal (newSViv (wcount)));
3363 else
3364 {
3365 int i;
3366 EXTEND (SP, wcount);
3367 for (i = 1; i <= wcount; ++i)
3368 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3369 }
3370}
3371
3372MODULE = Coro::State PACKAGE = Coro::Signal
3373
3374SV *
3375new (SV *klass)
3376 CODE:
3377 RETVAL = sv_bless (
3378 coro_waitarray_new (aTHX_ 0),
3379 GvSTASH (CvGV (cv))
3380 );
3381 OUTPUT:
3382 RETVAL
3383
3384void
3385wait (...)
3386 CODE:
3387 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3388
3389void
3390broadcast (SV *self)
3391 CODE:
3392{
3393 AV *av = (AV *)SvRV (self);
3394 coro_signal_wake (aTHX_ av, AvFILLp (av));
3395}
3396
3397void
3398send (SV *self)
3399 CODE:
3400{
3401 AV *av = (AV *)SvRV (self);
3402
3403 if (AvFILLp (av))
3404 coro_signal_wake (aTHX_ av, 1);
3405 else
3406 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3407}
3408
3409IV
3410awaited (SV *self)
3411 CODE:
3412 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3413 OUTPUT:
3414 RETVAL
3415
3416
3417MODULE = Coro::State PACKAGE = Coro::AnyEvent
3418
3419BOOT:
3420 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3421
3422void
3423_schedule (...)
3424 CODE:
3425{
3426 static int incede;
3427
3428 api_cede_notself (aTHX);
3429
3430 ++incede;
3431 while (coro_nready >= incede && api_cede (aTHX))
3432 ;
3433
3434 sv_setsv (sv_activity, &PL_sv_undef);
3435 if (coro_nready >= incede)
3436 {
3437 PUSHMARK (SP);
3438 PUTBACK;
3439 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3440 }
3441
3442 --incede;
3443}
3444
3445
3446MODULE = Coro::State PACKAGE = Coro::AIO
3447
3448void
3449_register (char *target, char *proto, SV *req)
3450 CODE:
3451{
3452 CV *req_cv = coro_sv_2cv (aTHX_ req);
3453 /* newXSproto doesn't return the CV on 5.8 */
3454 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3455 sv_setpv ((SV *)slf_cv, proto);
3456 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3457}
3458

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