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Comparing Coro/Coro/State.xs (file contents):
Revision 1.27 by root, Mon Aug 20 16:58:19 2001 UTC vs.
Revision 1.320 by root, Fri Nov 21 07:29:04 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
6 12
7#include <signal.h> 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
19#endif 47#endif
20 48
21#define MAY_FLUSH /* increases codesize */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
22 52
23#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 54static int cctx_max_idle = 4;
25 55
26/* The next macro should delcare a variable stacklevel that contains and approximation 56#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 57 (PERL_REVISION > (a) \
28 * and should be unique. */ 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106
107/* 5.8.7 */
108#ifndef SvRV_set
109# define SvRV_set(s,v) SvRV(s) = (v)
110#endif
111
112#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
113# undef CORO_STACKGUARD
114#endif
115
116#ifndef CORO_STACKGUARD
117# define CORO_STACKGUARD 0
118#endif
119
120/* prefer perl internal functions over our own? */
121#ifndef CORO_PREFER_PERL_FUNCTIONS
122# define CORO_PREFER_PERL_FUNCTIONS 0
123#endif
124
125/* The next macros try to return the current stack pointer, in an as
126 * portable way as possible. */
127#if __GNUC__ >= 4
128# define dSTACKLEVEL int stacklevel_dummy
129# define STACKLEVEL __builtin_frame_address (0)
130#else
131# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 132# define STACKLEVEL ((void *)&stacklevel)
133#endif
30 134
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 135#define IN_DESTRUCT (PL_main_cv == Nullcv)
136
137#if __GNUC__ >= 3
138# define attribute(x) __attribute__(x)
139# define expect(expr,value) __builtin_expect ((expr),(value))
140# define INLINE static inline
141#else
142# define attribute(x)
143# define expect(expr,value) (expr)
144# define INLINE static
145#endif
146
147#define expect_false(expr) expect ((expr) != 0, 0)
148#define expect_true(expr) expect ((expr) != 0, 1)
149
150#define NOINLINE attribute ((noinline))
32 151
33#include "CoroAPI.h" 152#include "CoroAPI.h"
153#define GCoroAPI (&coroapi) /* very sneaky */
34 154
155#ifdef USE_ITHREADS
156# if CORO_PTHREAD
157static void *coro_thx;
158# endif
159#endif
160
161static double (*nvtime)(); /* so why doesn't it take void? */
162
163/* we hijack an hopefully unused CV flag for our purposes */
164#define CVf_SLF 0x4000
165static OP *pp_slf (pTHX);
166
167static U32 cctx_gen;
168static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 169static struct CoroAPI coroapi;
170static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env;
172static HV *coro_state_stash, *coro_stash;
173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 174
37/* this is actually not only the c stack but also c registers etc... */ 175static AV *av_destroy; /* destruction queue */
176static SV *sv_manager; /* the manager coro */
177
178static GV *irsgv; /* $/ */
179static GV *stdoutgv; /* *STDOUT */
180static SV *rv_diehook;
181static SV *rv_warnhook;
182static HV *hv_sig; /* %SIG */
183
184/* async_pool helper stuff */
185static SV *sv_pool_rss;
186static SV *sv_pool_size;
187static SV *sv_async_pool_idle; /* description string */
188static AV *av_async_pool; /* idle pool */
189static SV *sv_Coro; /* class string */
190static CV *cv_pool_handler;
191static CV *cv_coro_state_new;
192
193/* Coro::AnyEvent */
194static SV *sv_activity;
195
196static struct coro_cctx *cctx_first;
197static int cctx_count, cctx_idle;
198
199enum {
200 CC_MAPPED = 0x01,
201 CC_NOREUSE = 0x02, /* throw this away after tracing */
202 CC_TRACE = 0x04,
203 CC_TRACE_SUB = 0x08, /* trace sub calls */
204 CC_TRACE_LINE = 0x10, /* trace each statement */
205 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
206};
207
208/* this is a structure representing a c-level coroutine */
38typedef struct { 209typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 210{
40 int usecnt; /* shared by how many coroutines */ 211 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 212
213 /* the stack */
214 void *sptr;
215 size_t ssize;
216
217 /* cpu state */
218 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
219 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
220 JMPENV *top_env;
43 coro_context cctx; 221 coro_context cctx;
44 222
45 void *sptr; 223 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 224#if CORO_USE_VALGRIND
47} coro_stack; 225 int valgrind_id;
226#endif
227 unsigned char flags;
228} coro_cctx;
48 229
230enum {
231 CF_RUNNING = 0x0001, /* coroutine is running */
232 CF_READY = 0x0002, /* coroutine is ready */
233 CF_NEW = 0x0004, /* has never been switched to */
234 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
235};
236
237/* the structure where most of the perl state is stored, overlaid on the cxstack */
238typedef struct
239{
240 SV *defsv;
241 AV *defav;
242 SV *errsv;
243 SV *irsgv;
244#define VAR(name,type) type name;
245# include "state.h"
246#undef VAR
247} perl_slots;
248
249#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
250
251/* this is a structure representing a perl-level coroutine */
49struct coro { 252struct coro {
50 /* the optional C context */ 253 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 254 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 255
55 /* optionally saved, might be zero */ 256 /* state data */
56 AV *defav; 257 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; 258 AV *mainstack;
68 SV **stack_sp; 259 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;
91 260
261 CV *startcv; /* the CV to execute */
92 /* data associated with this coroutine (initial args) */ 262 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 263 int refcnt; /* coroutines are refcounted, yes */
264 int flags; /* CF_ flags */
265 HV *hv; /* the perl hash associated with this coro, if any */
266 void (*on_destroy)(pTHX_ struct coro *coro);
267
268 /* statistics */
269 int usecount; /* number of transfers to this coro */
270
271 /* coro process data */
272 int prio;
273 SV *except; /* exception to be thrown */
274 SV *rouse_cb;
275
276 /* async_pool */
277 SV *saved_deffh;
278 SV *invoke_cb;
279 AV *invoke_av;
280
281 /* linked list */
282 struct coro *next, *prev;
94}; 283};
95 284
96typedef struct coro *Coro__State; 285typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 286typedef struct coro *Coro__State_or_hashref;
98 287
99static AV *main_mainstack; /* used to differentiate between $main and others */ 288/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 289/* and get copied between struct coro and these variables */
101static SV *ucoro_state_sv; 290/* the mainr easonw e don't support windows process emulation */
102static U32 ucoro_state_hash; 291static 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 void
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) 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
760 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
761 /*NORETURN*/
762}
763
764static void
765api_transfer(pTHX_ SV *prev, SV *next, int flags)
766{
767 transfer(aTHX_
768 sv_to_coro (prev, "Coro::transfer", "prev"),
769 sv_to_coro (next, "Coro::transfer", "next"),
770 flags);
771}
772 292
773/** Coro ********************************************************************/ 293/** Coro ********************************************************************/
774 294
775#define PRIO_MAX 3 295#define PRIO_MAX 3
776#define PRIO_HIGH 1 296#define PRIO_HIGH 1
… …
778#define PRIO_LOW -1 298#define PRIO_LOW -1
779#define PRIO_IDLE -3 299#define PRIO_IDLE -3
780#define PRIO_MIN -4 300#define PRIO_MIN -4
781 301
782/* for Coro.pm */ 302/* for Coro.pm */
783static GV *coro_current, *coro_idle; 303static SV *coro_current;
304static SV *coro_readyhook;
784static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 305static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
785static int coro_nready; 306static CV *cv_coro_run, *cv_coro_terminate;
307static struct coro *coro_first;
308#define coro_nready coroapi.nready
786 309
787static void 310/** lowlevel stuff **********************************************************/
788coro_enq (SV *sv) 311
312static SV *
313coro_get_sv (pTHX_ const char *name, int create)
789{ 314{
790 if (SvROK (sv)) 315#if PERL_VERSION_ATLEAST (5,10,0)
316 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
317 get_sv (name, create);
318#endif
319 return get_sv (name, create);
320}
321
322static AV *
323coro_get_av (pTHX_ const char *name, int create)
324{
325#if PERL_VERSION_ATLEAST (5,10,0)
326 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
327 get_av (name, create);
328#endif
329 return get_av (name, create);
330}
331
332static HV *
333coro_get_hv (pTHX_ const char *name, int create)
334{
335#if PERL_VERSION_ATLEAST (5,10,0)
336 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
337 get_hv (name, create);
338#endif
339 return get_hv (name, create);
340}
341
342/* may croak */
343INLINE CV *
344coro_sv_2cv (pTHX_ SV *sv)
345{
346 HV *st;
347 GV *gvp;
348 return sv_2cv (sv, &st, &gvp, 0);
349}
350
351static AV *
352coro_clone_padlist (pTHX_ CV *cv)
353{
354 AV *padlist = CvPADLIST (cv);
355 AV *newpadlist, *newpad;
356
357 newpadlist = newAV ();
358 AvREAL_off (newpadlist);
359#if PERL_VERSION_ATLEAST (5,10,0)
360 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
361#else
362 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
363#endif
364 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
365 --AvFILLp (padlist);
366
367 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
368 av_store (newpadlist, 1, (SV *)newpad);
369
370 return newpadlist;
371}
372
373static void
374free_padlist (pTHX_ AV *padlist)
375{
376 /* may be during global destruction */
377 if (SvREFCNT (padlist))
791 { 378 {
792 SV *hv = SvRV (sv); 379 I32 i = AvFILLp (padlist);
793 if (SvTYPE (hv) == SVt_PVHV) 380 while (i >= 0)
794 { 381 {
795 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 382 SV **svp = av_fetch (padlist, i--, FALSE);
796 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 383 if (svp)
384 {
385 SV *sv;
386 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
387 SvREFCNT_dec (sv);
797 388
798 prio = prio > PRIO_MAX ? PRIO_MAX 389 SvREFCNT_dec (*svp);
799 : prio < PRIO_MIN ? PRIO_MIN 390 }
800 : prio;
801
802 av_push (coro_ready [prio - PRIO_MIN], sv);
803 coro_nready++;
804
805 return;
806 } 391 }
392
393 SvREFCNT_dec ((SV*)padlist);
394 }
395}
396
397static int
398coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
399{
400 AV *padlist;
401 AV *av = (AV *)mg->mg_obj;
402
403 /* casting is fun. */
404 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
405 free_padlist (aTHX_ padlist);
406
407 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
408
409 return 0;
410}
411
412#define CORO_MAGIC_type_cv 26
413#define CORO_MAGIC_type_state PERL_MAGIC_ext
414
415static MGVTBL coro_cv_vtbl = {
416 0, 0, 0, 0,
417 coro_cv_free
418};
419
420#define CORO_MAGIC_NN(sv, type) \
421 (expect_true (SvMAGIC (sv)->mg_type == type) \
422 ? SvMAGIC (sv) \
423 : mg_find (sv, type))
424
425#define CORO_MAGIC(sv, type) \
426 (expect_true (SvMAGIC (sv)) \
427 ? CORO_MAGIC_NN (sv, type) \
428 : 0)
429
430#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
431#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
432
433INLINE struct coro *
434SvSTATE_ (pTHX_ SV *coro)
435{
436 HV *stash;
437 MAGIC *mg;
438
439 if (SvROK (coro))
440 coro = SvRV (coro);
441
442 if (expect_false (SvTYPE (coro) != SVt_PVHV))
443 croak ("Coro::State object required");
444
445 stash = SvSTASH (coro);
446 if (expect_false (stash != coro_stash && stash != coro_state_stash))
447 {
448 /* very slow, but rare, check */
449 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
450 croak ("Coro::State object required");
451 }
452
453 mg = CORO_MAGIC_state (coro);
454 return (struct coro *)mg->mg_ptr;
455}
456
457#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
458
459/* faster than SvSTATE, but expects a coroutine hv */
460#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
461#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
462
463/* the next two functions merely cache the padlists */
464static void
465get_padlist (pTHX_ CV *cv)
466{
467 MAGIC *mg = CORO_MAGIC_cv (cv);
468 AV *av;
469
470 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
471 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
472 else
473 {
474#if CORO_PREFER_PERL_FUNCTIONS
475 /* this is probably cleaner? but also slower! */
476 /* in practise, it seems to be less stable */
477 CV *cp = Perl_cv_clone (aTHX_ cv);
478 CvPADLIST (cv) = CvPADLIST (cp);
479 CvPADLIST (cp) = 0;
480 SvREFCNT_dec (cp);
481#else
482 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
483#endif
807 } 484 }
808
809 croak ("Coro::ready tried to enqueue something that is not a coroutine");
810} 485}
811 486
487static void
488put_padlist (pTHX_ CV *cv)
489{
490 MAGIC *mg = CORO_MAGIC_cv (cv);
491 AV *av;
492
493 if (expect_false (!mg))
494 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
495
496 av = (AV *)mg->mg_obj;
497
498 if (expect_false (AvFILLp (av) >= AvMAX (av)))
499 av_extend (av, AvMAX (av) + 1);
500
501 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
502}
503
504/** load & save, init *******************************************************/
505
506static void
507load_perl (pTHX_ Coro__State c)
508{
509 perl_slots *slot = c->slot;
510 c->slot = 0;
511
512 PL_mainstack = c->mainstack;
513
514 GvSV (PL_defgv) = slot->defsv;
515 GvAV (PL_defgv) = slot->defav;
516 GvSV (PL_errgv) = slot->errsv;
517 GvSV (irsgv) = slot->irsgv;
518
519 #define VAR(name,type) PL_ ## name = slot->name;
520 # include "state.h"
521 #undef VAR
522
523 {
524 dSP;
525
526 CV *cv;
527
528 /* now do the ugly restore mess */
529 while (expect_true (cv = (CV *)POPs))
530 {
531 put_padlist (aTHX_ cv); /* mark this padlist as available */
532 CvDEPTH (cv) = PTR2IV (POPs);
533 CvPADLIST (cv) = (AV *)POPs;
534 }
535
536 PUTBACK;
537 }
538
539 slf_frame = c->slf_frame;
540 CORO_THROW = c->except;
541}
542
543static void
544save_perl (pTHX_ Coro__State c)
545{
546 c->except = CORO_THROW;
547 c->slf_frame = slf_frame;
548
549 {
550 dSP;
551 I32 cxix = cxstack_ix;
552 PERL_CONTEXT *ccstk = cxstack;
553 PERL_SI *top_si = PL_curstackinfo;
554
555 /*
556 * the worst thing you can imagine happens first - we have to save
557 * (and reinitialize) all cv's in the whole callchain :(
558 */
559
560 XPUSHs (Nullsv);
561 /* this loop was inspired by pp_caller */
562 for (;;)
563 {
564 while (expect_true (cxix >= 0))
565 {
566 PERL_CONTEXT *cx = &ccstk[cxix--];
567
568 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
569 {
570 CV *cv = cx->blk_sub.cv;
571
572 if (expect_true (CvDEPTH (cv)))
573 {
574 EXTEND (SP, 3);
575 PUSHs ((SV *)CvPADLIST (cv));
576 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
577 PUSHs ((SV *)cv);
578
579 CvDEPTH (cv) = 0;
580 get_padlist (aTHX_ cv);
581 }
582 }
583 }
584
585 if (expect_true (top_si->si_type == PERLSI_MAIN))
586 break;
587
588 top_si = top_si->si_prev;
589 ccstk = top_si->si_cxstack;
590 cxix = top_si->si_cxix;
591 }
592
593 PUTBACK;
594 }
595
596 /* allocate some space on the context stack for our purposes */
597 /* we manually unroll here, as usually 2 slots is enough */
598 if (SLOT_COUNT >= 1) CXINC;
599 if (SLOT_COUNT >= 2) CXINC;
600 if (SLOT_COUNT >= 3) CXINC;
601 {
602 int i;
603 for (i = 3; i < SLOT_COUNT; ++i)
604 CXINC;
605 }
606 cxstack_ix -= SLOT_COUNT; /* undo allocation */
607
608 c->mainstack = PL_mainstack;
609
610 {
611 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
612
613 slot->defav = GvAV (PL_defgv);
614 slot->defsv = DEFSV;
615 slot->errsv = ERRSV;
616 slot->irsgv = GvSV (irsgv);
617
618 #define VAR(name,type) slot->name = PL_ ## name;
619 # include "state.h"
620 #undef VAR
621 }
622}
623
624/*
625 * allocate various perl stacks. This is almost an exact copy
626 * of perl.c:init_stacks, except that it uses less memory
627 * on the (sometimes correct) assumption that coroutines do
628 * not usually need a lot of stackspace.
629 */
630#if CORO_PREFER_PERL_FUNCTIONS
631# define coro_init_stacks(thx) init_stacks ()
632#else
633static void
634coro_init_stacks (pTHX)
635{
636 PL_curstackinfo = new_stackinfo(32, 8);
637 PL_curstackinfo->si_type = PERLSI_MAIN;
638 PL_curstack = PL_curstackinfo->si_stack;
639 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
640
641 PL_stack_base = AvARRAY(PL_curstack);
642 PL_stack_sp = PL_stack_base;
643 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
644
645 New(50,PL_tmps_stack,32,SV*);
646 PL_tmps_floor = -1;
647 PL_tmps_ix = -1;
648 PL_tmps_max = 32;
649
650 New(54,PL_markstack,16,I32);
651 PL_markstack_ptr = PL_markstack;
652 PL_markstack_max = PL_markstack + 16;
653
654#ifdef SET_MARK_OFFSET
655 SET_MARK_OFFSET;
656#endif
657
658 New(54,PL_scopestack,8,I32);
659 PL_scopestack_ix = 0;
660 PL_scopestack_max = 8;
661
662 New(54,PL_savestack,24,ANY);
663 PL_savestack_ix = 0;
664 PL_savestack_max = 24;
665
666#if !PERL_VERSION_ATLEAST (5,10,0)
667 New(54,PL_retstack,4,OP*);
668 PL_retstack_ix = 0;
669 PL_retstack_max = 4;
670#endif
671}
672#endif
673
674/*
675 * destroy the stacks, the callchain etc...
676 */
677static void
678coro_destruct_stacks (pTHX)
679{
680 while (PL_curstackinfo->si_next)
681 PL_curstackinfo = PL_curstackinfo->si_next;
682
683 while (PL_curstackinfo)
684 {
685 PERL_SI *p = PL_curstackinfo->si_prev;
686
687 if (!IN_DESTRUCT)
688 SvREFCNT_dec (PL_curstackinfo->si_stack);
689
690 Safefree (PL_curstackinfo->si_cxstack);
691 Safefree (PL_curstackinfo);
692 PL_curstackinfo = p;
693 }
694
695 Safefree (PL_tmps_stack);
696 Safefree (PL_markstack);
697 Safefree (PL_scopestack);
698 Safefree (PL_savestack);
699#if !PERL_VERSION_ATLEAST (5,10,0)
700 Safefree (PL_retstack);
701#endif
702}
703
704#define CORO_RSS \
705 rss += sizeof (SYM (curstackinfo)); \
706 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
707 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
708 rss += SYM (tmps_max) * sizeof (SV *); \
709 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
710 rss += SYM (scopestack_max) * sizeof (I32); \
711 rss += SYM (savestack_max) * sizeof (ANY);
712
713static size_t
714coro_rss (pTHX_ struct coro *coro)
715{
716 size_t rss = sizeof (*coro);
717
718 if (coro->mainstack)
719 {
720 if (coro->flags & CF_RUNNING)
721 {
722 #define SYM(sym) PL_ ## sym
723 CORO_RSS;
724 #undef SYM
725 }
726 else
727 {
728 #define SYM(sym) coro->slot->sym
729 CORO_RSS;
730 #undef SYM
731 }
732 }
733
734 return rss;
735}
736
737/** coroutine stack handling ************************************************/
738
739static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
740static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
741static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
742
743/* apparently < 5.8.8 */
744#ifndef MgPV_nolen_const
745#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
746 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
747 (const char*)(mg)->mg_ptr)
748#endif
749
750/*
751 * This overrides the default magic get method of %SIG elements.
752 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
753 * and instead of tryign to save and restore the hash elements, we just provide
754 * readback here.
755 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
756 * not expecting this to actually change the hook. This is a potential problem
757 * when a schedule happens then, but we ignore this.
758 */
759static int
760coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
761{
762 const char *s = MgPV_nolen_const (mg);
763
764 if (*s == '_')
765 {
766 SV **svp = 0;
767
768 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
769 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
770
771 if (svp)
772 {
773 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
774 return 0;
775 }
776 }
777
778 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
779}
780
781static int
782coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
783{
784 const char *s = MgPV_nolen_const (mg);
785
786 if (*s == '_')
787 {
788 SV **svp = 0;
789
790 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
791 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
792
793 if (svp)
794 {
795 SV *old = *svp;
796 *svp = 0;
797 SvREFCNT_dec (old);
798 return 0;
799 }
800 }
801
802 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
803}
804
805static int
806coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
807{
808 const char *s = MgPV_nolen_const (mg);
809
810 if (*s == '_')
811 {
812 SV **svp = 0;
813
814 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
815 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
816
817 if (svp)
818 {
819 SV *old = *svp;
820 *svp = newSVsv (sv);
821 SvREFCNT_dec (old);
822 return 0;
823 }
824 }
825
826 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
827}
828
829static void
830prepare_nop (pTHX_ struct coro_transfer_args *ta)
831{
832 /* kind of mega-hacky, but works */
833 ta->next = ta->prev = (struct coro *)ta;
834}
835
836static int
837slf_check_nop (pTHX_ struct CoroSLF *frame)
838{
839 return 0;
840}
841
842static int
843slf_check_repeat (pTHX_ struct CoroSLF *frame)
844{
845 return 1;
846}
847
848static UNOP coro_setup_op;
849
850static void NOINLINE /* noinline to keep it out of the transfer fast path */
851coro_setup (pTHX_ struct coro *coro)
852{
853 /*
854 * emulate part of the perl startup here.
855 */
856 coro_init_stacks (aTHX);
857
858 PL_runops = RUNOPS_DEFAULT;
859 PL_curcop = &PL_compiling;
860 PL_in_eval = EVAL_NULL;
861 PL_comppad = 0;
862 PL_curpm = 0;
863 PL_curpad = 0;
864 PL_localizing = 0;
865 PL_dirty = 0;
866 PL_restartop = 0;
867#if PERL_VERSION_ATLEAST (5,10,0)
868 PL_parser = 0;
869#endif
870
871 /* recreate the die/warn hooks */
872 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
873 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
874
875 GvSV (PL_defgv) = newSV (0);
876 GvAV (PL_defgv) = coro->args; coro->args = 0;
877 GvSV (PL_errgv) = newSV (0);
878 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
879 PL_rs = newSVsv (GvSV (irsgv));
880 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
881
882 {
883 dSP;
884 UNOP myop;
885
886 Zero (&myop, 1, UNOP);
887 myop.op_next = Nullop;
888 myop.op_type = OP_ENTERSUB;
889 myop.op_flags = OPf_WANT_VOID;
890
891 PUSHMARK (SP);
892 PUSHs ((SV *)coro->startcv);
893 PUTBACK;
894 PL_op = (OP *)&myop;
895 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
896 }
897
898 /* this newly created coroutine might be run on an existing cctx which most
899 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
900 */
901 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
902 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
903
904 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
905 coro_setup_op.op_next = PL_op;
906 coro_setup_op.op_type = OP_ENTERSUB;
907 coro_setup_op.op_ppaddr = pp_slf;
908 /* no flags etc. required, as an init function won't be called */
909
910 PL_op = (OP *)&coro_setup_op;
911
912 /* copy throw, in case it was set before coro_setup */
913 CORO_THROW = coro->except;
914}
915
916static void
917coro_destruct (pTHX_ struct coro *coro)
918{
919 if (!IN_DESTRUCT)
920 {
921 /* restore all saved variables and stuff */
922 LEAVE_SCOPE (0);
923 assert (PL_tmps_floor == -1);
924
925 /* free all temporaries */
926 FREETMPS;
927 assert (PL_tmps_ix == -1);
928
929 /* unwind all extra stacks */
930 POPSTACK_TO (PL_mainstack);
931
932 /* unwind main stack */
933 dounwind (-1);
934 }
935
936 SvREFCNT_dec (GvSV (PL_defgv));
937 SvREFCNT_dec (GvAV (PL_defgv));
938 SvREFCNT_dec (GvSV (PL_errgv));
939 SvREFCNT_dec (PL_defoutgv);
940 SvREFCNT_dec (PL_rs);
941 SvREFCNT_dec (GvSV (irsgv));
942
943 SvREFCNT_dec (PL_diehook);
944 SvREFCNT_dec (PL_warnhook);
945
946 SvREFCNT_dec (coro->saved_deffh);
947 SvREFCNT_dec (coro->rouse_cb);
948 SvREFCNT_dec (coro->invoke_cb);
949 SvREFCNT_dec (coro->invoke_av);
950
951 coro_destruct_stacks (aTHX);
952}
953
954INLINE void
955free_coro_mortal (pTHX)
956{
957 if (expect_true (coro_mortal))
958 {
959 SvREFCNT_dec (coro_mortal);
960 coro_mortal = 0;
961 }
962}
963
964static int
965runops_trace (pTHX)
966{
967 COP *oldcop = 0;
968 int oldcxix = -2;
969 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
970 coro_cctx *cctx = coro->cctx;
971
972 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
973 {
974 PERL_ASYNC_CHECK ();
975
976 if (cctx->flags & CC_TRACE_ALL)
977 {
978 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
979 {
980 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
981 SV **bot, **top;
982 AV *av = newAV (); /* return values */
983 SV **cb;
984 dSP;
985
986 GV *gv = CvGV (cx->blk_sub.cv);
987 SV *fullname = sv_2mortal (newSV (0));
988 if (isGV (gv))
989 gv_efullname3 (fullname, gv, 0);
990
991 bot = PL_stack_base + cx->blk_oldsp + 1;
992 top = cx->blk_gimme == G_ARRAY ? SP + 1
993 : cx->blk_gimme == G_SCALAR ? bot + 1
994 : bot;
995
996 av_extend (av, top - bot);
997 while (bot < top)
998 av_push (av, SvREFCNT_inc_NN (*bot++));
999
1000 PL_runops = RUNOPS_DEFAULT;
1001 ENTER;
1002 SAVETMPS;
1003 EXTEND (SP, 3);
1004 PUSHMARK (SP);
1005 PUSHs (&PL_sv_no);
1006 PUSHs (fullname);
1007 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1008 PUTBACK;
1009 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1010 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1011 SPAGAIN;
1012 FREETMPS;
1013 LEAVE;
1014 PL_runops = runops_trace;
1015 }
1016
1017 if (oldcop != PL_curcop)
1018 {
1019 oldcop = PL_curcop;
1020
1021 if (PL_curcop != &PL_compiling)
1022 {
1023 SV **cb;
1024
1025 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1026 {
1027 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1028
1029 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1030 {
1031 dSP;
1032 GV *gv = CvGV (cx->blk_sub.cv);
1033 SV *fullname = sv_2mortal (newSV (0));
1034
1035 if (isGV (gv))
1036 gv_efullname3 (fullname, gv, 0);
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PUSHMARK (SP);
1043 PUSHs (&PL_sv_yes);
1044 PUSHs (fullname);
1045 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054
1055 oldcxix = cxstack_ix;
1056 }
1057
1058 if (cctx->flags & CC_TRACE_LINE)
1059 {
1060 dSP;
1061
1062 PL_runops = RUNOPS_DEFAULT;
1063 ENTER;
1064 SAVETMPS;
1065 EXTEND (SP, 3);
1066 PL_runops = RUNOPS_DEFAULT;
1067 PUSHMARK (SP);
1068 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1069 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1070 PUTBACK;
1071 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1072 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1073 SPAGAIN;
1074 FREETMPS;
1075 LEAVE;
1076 PL_runops = runops_trace;
1077 }
1078 }
1079 }
1080 }
1081 }
1082
1083 TAINT_NOT;
1084 return 0;
1085}
1086
1087static struct coro_cctx *cctx_ssl_cctx;
1088static struct CoroSLF cctx_ssl_frame;
1089
1090static void
1091slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1092{
1093 ta->prev = (struct coro *)cctx_ssl_cctx;
1094 ta->next = 0;
1095}
1096
1097static int
1098slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1099{
1100 *frame = cctx_ssl_frame;
1101
1102 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1103}
1104
1105/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1106static void NOINLINE
1107cctx_prepare (pTHX_ coro_cctx *cctx)
1108{
1109 PL_top_env = &PL_start_env;
1110
1111 if (cctx->flags & CC_TRACE)
1112 PL_runops = runops_trace;
1113
1114 /* we already must be executing an SLF op, there is no other valid way
1115 * that can lead to creation of a new cctx */
1116 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1117 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1118
1119 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1120 cctx_ssl_cctx = cctx;
1121 cctx_ssl_frame = slf_frame;
1122
1123 slf_frame.prepare = slf_prepare_set_stacklevel;
1124 slf_frame.check = slf_check_set_stacklevel;
1125}
1126
1127/* the tail of transfer: execute stuff we can only do after a transfer */
1128INLINE void
1129transfer_tail (pTHX)
1130{
1131 free_coro_mortal (aTHX);
1132}
1133
1134/*
1135 * this is a _very_ stripped down perl interpreter ;)
1136 */
1137static void
1138cctx_run (void *arg)
1139{
1140#ifdef USE_ITHREADS
1141# if CORO_PTHREAD
1142 PERL_SET_CONTEXT (coro_thx);
1143# endif
1144#endif
1145 {
1146 dTHX;
1147
1148 /* normally we would need to skip the entersub here */
1149 /* not doing so will re-execute it, which is exactly what we want */
1150 /* PL_nop = PL_nop->op_next */
1151
1152 /* inject a fake subroutine call to cctx_init */
1153 cctx_prepare (aTHX_ (coro_cctx *)arg);
1154
1155 /* cctx_run is the alternative tail of transfer() */
1156 transfer_tail (aTHX);
1157
1158 /* somebody or something will hit me for both perl_run and PL_restartop */
1159 PL_restartop = PL_op;
1160 perl_run (PL_curinterp);
1161 /*
1162 * Unfortunately, there is no way to get at the return values of the
1163 * coro body here, as perl_run destroys these
1164 */
1165
1166 /*
1167 * If perl-run returns we assume exit() was being called or the coro
1168 * fell off the end, which seems to be the only valid (non-bug)
1169 * reason for perl_run to return. We try to exit by jumping to the
1170 * bootstrap-time "top" top_env, as we cannot restore the "main"
1171 * coroutine as Coro has no such concept
1172 */
1173 PL_top_env = main_top_env;
1174 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1175 }
1176}
1177
1178static coro_cctx *
1179cctx_new ()
1180{
1181 coro_cctx *cctx;
1182
1183 ++cctx_count;
1184 New (0, cctx, 1, coro_cctx);
1185
1186 cctx->gen = cctx_gen;
1187 cctx->flags = 0;
1188 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1189
1190 return cctx;
1191}
1192
1193/* create a new cctx only suitable as source */
1194static coro_cctx *
1195cctx_new_empty ()
1196{
1197 coro_cctx *cctx = cctx_new ();
1198
1199 cctx->sptr = 0;
1200 coro_create (&cctx->cctx, 0, 0, 0, 0);
1201
1202 return cctx;
1203}
1204
1205/* create a new cctx suitable as destination/running a perl interpreter */
1206static coro_cctx *
1207cctx_new_run ()
1208{
1209 coro_cctx *cctx = cctx_new ();
1210 void *stack_start;
1211 size_t stack_size;
1212
1213#if HAVE_MMAP
1214 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1215 /* mmap supposedly does allocate-on-write for us */
1216 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1217
1218 if (cctx->sptr != (void *)-1)
1219 {
1220 #if CORO_STACKGUARD
1221 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1222 #endif
1223 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1224 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1225 cctx->flags |= CC_MAPPED;
1226 }
1227 else
1228#endif
1229 {
1230 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1231 New (0, cctx->sptr, cctx_stacksize, long);
1232
1233 if (!cctx->sptr)
1234 {
1235 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1236 _exit (EXIT_FAILURE);
1237 }
1238
1239 stack_start = cctx->sptr;
1240 stack_size = cctx->ssize;
1241 }
1242
1243 #if CORO_USE_VALGRIND
1244 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1245 #endif
1246
1247 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1248
1249 return cctx;
1250}
1251
1252static void
1253cctx_destroy (coro_cctx *cctx)
1254{
1255 if (!cctx)
1256 return;
1257
1258 --cctx_count;
1259 coro_destroy (&cctx->cctx);
1260
1261 /* coro_transfer creates new, empty cctx's */
1262 if (cctx->sptr)
1263 {
1264 #if CORO_USE_VALGRIND
1265 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1266 #endif
1267
1268#if HAVE_MMAP
1269 if (cctx->flags & CC_MAPPED)
1270 munmap (cctx->sptr, cctx->ssize);
1271 else
1272#endif
1273 Safefree (cctx->sptr);
1274 }
1275
1276 Safefree (cctx);
1277}
1278
1279/* wether this cctx should be destructed */
1280#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1281
1282static coro_cctx *
1283cctx_get (pTHX)
1284{
1285 while (expect_true (cctx_first))
1286 {
1287 coro_cctx *cctx = cctx_first;
1288 cctx_first = cctx->next;
1289 --cctx_idle;
1290
1291 if (expect_true (!CCTX_EXPIRED (cctx)))
1292 return cctx;
1293
1294 cctx_destroy (cctx);
1295 }
1296
1297 return cctx_new_run ();
1298}
1299
1300static void
1301cctx_put (coro_cctx *cctx)
1302{
1303 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1304
1305 /* free another cctx if overlimit */
1306 if (expect_false (cctx_idle >= cctx_max_idle))
1307 {
1308 coro_cctx *first = cctx_first;
1309 cctx_first = first->next;
1310 --cctx_idle;
1311
1312 cctx_destroy (first);
1313 }
1314
1315 ++cctx_idle;
1316 cctx->next = cctx_first;
1317 cctx_first = cctx;
1318}
1319
1320/** coroutine switching *****************************************************/
1321
1322static void
1323transfer_check (pTHX_ struct coro *prev, struct coro *next)
1324{
1325 /* TODO: throwing up here is considered harmful */
1326
1327 if (expect_true (prev != next))
1328 {
1329 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1330 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1331
1332 if (expect_false (next->flags & CF_RUNNING))
1333 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1334
1335 if (expect_false (next->flags & CF_DESTROYED))
1336 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1337
1338#if !PERL_VERSION_ATLEAST (5,10,0)
1339 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1340 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1341#endif
1342 }
1343}
1344
1345/* always use the TRANSFER macro */
1346static void NOINLINE /* noinline so we have a fixed stackframe */
1347transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1348{
1349 dSTACKLEVEL;
1350
1351 /* sometimes transfer is only called to set idle_sp */
1352 if (expect_false (!next))
1353 {
1354 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1355 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1356 }
1357 else if (expect_true (prev != next))
1358 {
1359 coro_cctx *prev__cctx;
1360
1361 if (expect_false (prev->flags & CF_NEW))
1362 {
1363 /* create a new empty/source context */
1364 prev->cctx = cctx_new_empty ();
1365 prev->flags &= ~CF_NEW;
1366 prev->flags |= CF_RUNNING;
1367 }
1368
1369 prev->flags &= ~CF_RUNNING;
1370 next->flags |= CF_RUNNING;
1371
1372 /* first get rid of the old state */
1373 save_perl (aTHX_ prev);
1374
1375 if (expect_false (next->flags & CF_NEW))
1376 {
1377 /* need to start coroutine */
1378 next->flags &= ~CF_NEW;
1379 /* setup coroutine call */
1380 coro_setup (aTHX_ next);
1381 }
1382 else
1383 load_perl (aTHX_ next);
1384
1385 prev__cctx = prev->cctx;
1386
1387 /* possibly untie and reuse the cctx */
1388 if (expect_true (
1389 prev__cctx->idle_sp == STACKLEVEL
1390 && !(prev__cctx->flags & CC_TRACE)
1391 && !force_cctx
1392 ))
1393 {
1394 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1395 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1396
1397 prev->cctx = 0;
1398
1399 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1400 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1401 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1402 if (!next->cctx)
1403 next->cctx = cctx_get (aTHX);
1404
1405 cctx_put (prev__cctx);
1406 }
1407
1408 ++next->usecount;
1409
1410 if (expect_true (!next->cctx))
1411 next->cctx = cctx_get (aTHX);
1412
1413 if (expect_false (prev__cctx != next->cctx))
1414 {
1415 prev__cctx->top_env = PL_top_env;
1416 PL_top_env = next->cctx->top_env;
1417 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1418 }
1419
1420 transfer_tail (aTHX);
1421 }
1422}
1423
1424#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1425#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1426
1427/** high level stuff ********************************************************/
1428
1429static int
1430coro_state_destroy (pTHX_ struct coro *coro)
1431{
1432 if (coro->flags & CF_DESTROYED)
1433 return 0;
1434
1435 if (coro->on_destroy)
1436 coro->on_destroy (aTHX_ coro);
1437
1438 coro->flags |= CF_DESTROYED;
1439
1440 if (coro->flags & CF_READY)
1441 {
1442 /* reduce nready, as destroying a ready coro effectively unreadies it */
1443 /* alternative: look through all ready queues and remove the coro */
1444 --coro_nready;
1445 }
1446 else
1447 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1448
1449 if (coro->mainstack && coro->mainstack != main_mainstack)
1450 {
1451 struct coro temp;
1452
1453 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1454
1455 save_perl (aTHX_ &temp);
1456 load_perl (aTHX_ coro);
1457
1458 coro_destruct (aTHX_ coro);
1459
1460 load_perl (aTHX_ &temp);
1461
1462 coro->slot = 0;
1463 }
1464
1465 cctx_destroy (coro->cctx);
1466 SvREFCNT_dec (coro->startcv);
1467 SvREFCNT_dec (coro->args);
1468 SvREFCNT_dec (CORO_THROW);
1469
1470 if (coro->next) coro->next->prev = coro->prev;
1471 if (coro->prev) coro->prev->next = coro->next;
1472 if (coro == coro_first) coro_first = coro->next;
1473
1474 return 1;
1475}
1476
1477static int
1478coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1479{
1480 struct coro *coro = (struct coro *)mg->mg_ptr;
1481 mg->mg_ptr = 0;
1482
1483 coro->hv = 0;
1484
1485 if (--coro->refcnt < 0)
1486 {
1487 coro_state_destroy (aTHX_ coro);
1488 Safefree (coro);
1489 }
1490
1491 return 0;
1492}
1493
1494static int
1495coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1496{
1497 struct coro *coro = (struct coro *)mg->mg_ptr;
1498
1499 ++coro->refcnt;
1500
1501 return 0;
1502}
1503
1504static MGVTBL coro_state_vtbl = {
1505 0, 0, 0, 0,
1506 coro_state_free,
1507 0,
1508#ifdef MGf_DUP
1509 coro_state_dup,
1510#else
1511# define MGf_DUP 0
1512#endif
1513};
1514
1515static void
1516prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1517{
1518 ta->prev = SvSTATE (prev_sv);
1519 ta->next = SvSTATE (next_sv);
1520 TRANSFER_CHECK (*ta);
1521}
1522
1523static void
1524api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1525{
1526 struct coro_transfer_args ta;
1527
1528 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1529 TRANSFER (ta, 1);
1530}
1531
1532/*****************************************************************************/
1533/* gensub: simple closure generation utility */
1534
1535#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1536
1537/* create a closure from XS, returns a code reference */
1538/* the arg can be accessed via GENSUB_ARG from the callback */
1539/* the callback must use dXSARGS/XSRETURN */
812static SV * 1540static SV *
813coro_deq (int min_prio) 1541gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
814{ 1542{
815 int prio = PRIO_MAX - PRIO_MIN; 1543 CV *cv = (CV *)newSV (0);
816 1544
817 min_prio -= PRIO_MIN; 1545 sv_upgrade ((SV *)cv, SVt_PVCV);
818 if (min_prio < 0)
819 min_prio = 0;
820 1546
1547 CvANON_on (cv);
1548 CvISXSUB_on (cv);
1549 CvXSUB (cv) = xsub;
1550 GENSUB_ARG = arg;
1551
1552 return newRV_noinc ((SV *)cv);
1553}
1554
1555/** Coro ********************************************************************/
1556
1557INLINE void
1558coro_enq (pTHX_ struct coro *coro)
1559{
1560 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1561}
1562
1563INLINE SV *
1564coro_deq (pTHX)
1565{
1566 int prio;
1567
821 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1568 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
822 if (av_len (coro_ready[prio]) >= 0) 1569 if (AvFILLp (coro_ready [prio]) >= 0)
1570 return av_shift (coro_ready [prio]);
1571
1572 return 0;
1573}
1574
1575static int
1576api_ready (pTHX_ SV *coro_sv)
1577{
1578 struct coro *coro;
1579 SV *sv_hook;
1580 void (*xs_hook)(void);
1581
1582 if (SvROK (coro_sv))
1583 coro_sv = SvRV (coro_sv);
1584
1585 coro = SvSTATE (coro_sv);
1586
1587 if (coro->flags & CF_READY)
1588 return 0;
1589
1590 coro->flags |= CF_READY;
1591
1592 sv_hook = coro_nready ? 0 : coro_readyhook;
1593 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1594
1595 coro_enq (aTHX_ coro);
1596 ++coro_nready;
1597
1598 if (sv_hook)
1599 {
1600 dSP;
1601
1602 ENTER;
1603 SAVETMPS;
1604
1605 PUSHMARK (SP);
1606 PUTBACK;
1607 call_sv (sv_hook, G_VOID | G_DISCARD);
1608
1609 FREETMPS;
1610 LEAVE;
1611 }
1612
1613 if (xs_hook)
1614 xs_hook ();
1615
1616 return 1;
1617}
1618
1619static int
1620api_is_ready (pTHX_ SV *coro_sv)
1621{
1622 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1623}
1624
1625/* expects to own a reference to next->hv */
1626INLINE void
1627prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1628{
1629 SV *prev_sv = SvRV (coro_current);
1630
1631 ta->prev = SvSTATE_hv (prev_sv);
1632 ta->next = next;
1633
1634 TRANSFER_CHECK (*ta);
1635
1636 SvRV_set (coro_current, (SV *)next->hv);
1637
1638 free_coro_mortal (aTHX);
1639 coro_mortal = prev_sv;
1640}
1641
1642static void
1643prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1644{
1645 for (;;)
1646 {
1647 SV *next_sv = coro_deq (aTHX);
1648
1649 if (expect_true (next_sv))
1650 {
1651 struct coro *next = SvSTATE_hv (next_sv);
1652
1653 /* cannot transfer to destroyed coros, skip and look for next */
1654 if (expect_false (next->flags & CF_DESTROYED))
1655 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1656 else
1657 {
1658 next->flags &= ~CF_READY;
1659 --coro_nready;
1660
1661 prepare_schedule_to (aTHX_ ta, next);
1662 break;
1663 }
1664 }
1665 else
1666 {
1667 /* nothing to schedule: call the idle handler */
1668 dSP;
1669
1670 ENTER;
1671 SAVETMPS;
1672
1673 PUSHMARK (SP);
1674 PUTBACK;
1675 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1676
1677 FREETMPS;
1678 LEAVE;
1679 }
1680 }
1681}
1682
1683INLINE void
1684prepare_cede (pTHX_ struct coro_transfer_args *ta)
1685{
1686 api_ready (aTHX_ coro_current);
1687 prepare_schedule (aTHX_ ta);
1688}
1689
1690INLINE void
1691prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1692{
1693 SV *prev = SvRV (coro_current);
1694
1695 if (coro_nready)
1696 {
1697 prepare_schedule (aTHX_ ta);
1698 api_ready (aTHX_ prev);
1699 }
1700 else
1701 prepare_nop (aTHX_ ta);
1702}
1703
1704static void
1705api_schedule (pTHX)
1706{
1707 struct coro_transfer_args ta;
1708
1709 prepare_schedule (aTHX_ &ta);
1710 TRANSFER (ta, 1);
1711}
1712
1713static void
1714api_schedule_to (pTHX_ SV *coro_sv)
1715{
1716 struct coro_transfer_args ta;
1717 struct coro *next = SvSTATE (coro_sv);
1718
1719 SvREFCNT_inc_NN (coro_sv);
1720 prepare_schedule_to (aTHX_ &ta, next);
1721}
1722
1723static int
1724api_cede (pTHX)
1725{
1726 struct coro_transfer_args ta;
1727
1728 prepare_cede (aTHX_ &ta);
1729
1730 if (expect_true (ta.prev != ta.next))
1731 {
1732 TRANSFER (ta, 1);
1733 return 1;
1734 }
1735 else
1736 return 0;
1737}
1738
1739static int
1740api_cede_notself (pTHX)
1741{
1742 if (coro_nready)
1743 {
1744 struct coro_transfer_args ta;
1745
1746 prepare_cede_notself (aTHX_ &ta);
1747 TRANSFER (ta, 1);
1748 return 1;
1749 }
1750 else
1751 return 0;
1752}
1753
1754static void
1755api_trace (pTHX_ SV *coro_sv, int flags)
1756{
1757 struct coro *coro = SvSTATE (coro_sv);
1758
1759 if (flags & CC_TRACE)
1760 {
1761 if (!coro->cctx)
1762 coro->cctx = cctx_new_run ();
1763 else if (!(coro->cctx->flags & CC_TRACE))
1764 croak ("cannot enable tracing on coroutine with custom stack,");
1765
1766 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1767 }
1768 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1769 {
1770 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1771
1772 if (coro->flags & CF_RUNNING)
1773 PL_runops = RUNOPS_DEFAULT;
1774 else
1775 coro->slot->runops = RUNOPS_DEFAULT;
1776 }
1777}
1778
1779static void
1780coro_call_on_destroy (pTHX_ struct coro *coro)
1781{
1782 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1783 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1784
1785 if (on_destroyp)
1786 {
1787 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1788
1789 while (AvFILLp (on_destroy) >= 0)
1790 {
1791 dSP; /* don't disturb outer sp */
1792 SV *cb = av_pop (on_destroy);
1793
1794 PUSHMARK (SP);
1795
1796 if (statusp)
1797 {
1798 int i;
1799 AV *status = (AV *)SvRV (*statusp);
1800 EXTEND (SP, AvFILLp (status) + 1);
1801
1802 for (i = 0; i <= AvFILLp (status); ++i)
1803 PUSHs (AvARRAY (status)[i]);
1804 }
1805
1806 PUTBACK;
1807 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1808 }
1809 }
1810}
1811
1812static void
1813slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1814{
1815 int i;
1816 HV *hv = (HV *)SvRV (coro_current);
1817 AV *av = newAV ();
1818
1819 av_extend (av, items - 1);
1820 for (i = 0; i < items; ++i)
1821 av_push (av, SvREFCNT_inc_NN (arg [i]));
1822
1823 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1824
1825 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1826 api_ready (aTHX_ sv_manager);
1827
1828 frame->prepare = prepare_schedule;
1829 frame->check = slf_check_repeat;
1830}
1831
1832/*****************************************************************************/
1833/* async pool handler */
1834
1835static int
1836slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1837{
1838 HV *hv = (HV *)SvRV (coro_current);
1839 struct coro *coro = (struct coro *)frame->data;
1840
1841 if (!coro->invoke_cb)
1842 return 1; /* loop till we have invoke */
1843 else
1844 {
1845 hv_store (hv, "desc", sizeof ("desc") - 1,
1846 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1847
1848 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1849
823 { 1850 {
824 coro_nready--; 1851 dSP;
825 return av_shift (coro_ready[prio]); 1852 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1853 PUTBACK;
826 } 1854 }
827 1855
1856 SvREFCNT_dec (GvAV (PL_defgv));
1857 GvAV (PL_defgv) = coro->invoke_av;
1858 coro->invoke_av = 0;
1859
1860 return 0;
1861 }
1862}
1863
1864static void
1865slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1866{
1867 HV *hv = (HV *)SvRV (coro_current);
1868 struct coro *coro = SvSTATE_hv ((SV *)hv);
1869
1870 if (expect_true (coro->saved_deffh))
1871 {
1872 /* subsequent iteration */
1873 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1874 coro->saved_deffh = 0;
1875
1876 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1877 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1878 {
1879 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1880 coro->invoke_av = newAV ();
1881
1882 frame->prepare = prepare_nop;
1883 }
1884 else
1885 {
1886 av_clear (GvAV (PL_defgv));
1887 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1888
1889 coro->prio = 0;
1890
1891 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1892 api_trace (aTHX_ coro_current, 0);
1893
1894 frame->prepare = prepare_schedule;
1895 av_push (av_async_pool, SvREFCNT_inc (hv));
1896 }
1897 }
1898 else
1899 {
1900 /* first iteration, simply fall through */
1901 frame->prepare = prepare_nop;
1902 }
1903
1904 frame->check = slf_check_pool_handler;
1905 frame->data = (void *)coro;
1906}
1907
1908/*****************************************************************************/
1909/* rouse callback */
1910
1911#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1912
1913static void
1914coro_rouse_callback (pTHX_ CV *cv)
1915{
1916 dXSARGS;
1917 SV *data = (SV *)GENSUB_ARG;
1918
1919 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1920 {
1921 /* first call, set args */
1922 AV *av = newAV ();
1923 SV *coro = SvRV (data);
1924
1925 SvRV_set (data, (SV *)av);
1926 api_ready (aTHX_ coro);
1927 SvREFCNT_dec (coro);
1928
1929 /* better take a full copy of the arguments */
1930 while (items--)
1931 av_store (av, items, newSVsv (ST (items)));
1932 }
1933
1934 XSRETURN_EMPTY;
1935}
1936
1937static int
1938slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1939{
1940 SV *data = (SV *)frame->data;
1941
1942 if (CORO_THROW)
1943 return 0;
1944
1945 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1946 return 1;
1947
1948 /* now push all results on the stack */
1949 {
1950 dSP;
1951 AV *av = (AV *)SvRV (data);
1952 int i;
1953
1954 EXTEND (SP, AvFILLp (av) + 1);
1955 for (i = 0; i <= AvFILLp (av); ++i)
1956 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1957
1958 /* we have stolen the elements, so ste length to zero and free */
1959 AvFILLp (av) = -1;
1960 av_undef (av);
1961
1962 PUTBACK;
1963 }
1964
828 return 0; 1965 return 0;
829} 1966}
830 1967
831static void 1968static void
832api_ready (SV *coro) 1969slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
833{ 1970{
834 coro_enq (SvREFCNT_inc (coro)); 1971 SV *cb;
835}
836 1972
837static void 1973 if (items)
838api_schedule (int cede) 1974 cb = arg [0];
839{ 1975 else
840 SV *prev, *next; 1976 {
1977 struct coro *coro = SvSTATE_current;
841 1978
842 prev = GvSV (coro_current); 1979 if (!coro->rouse_cb)
1980 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
843 1981
844 if (cede) 1982 cb = sv_2mortal (coro->rouse_cb);
845 coro_enq (SvREFCNT_inc (prev)); 1983 coro->rouse_cb = 0;
1984 }
846 1985
847 next = coro_deq (PRIO_MIN); 1986 if (!SvROK (cb)
1987 || SvTYPE (SvRV (cb)) != SVt_PVCV
1988 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1989 croak ("Coro::rouse_wait called with illegal callback argument,");
848 1990
849 if (!next) 1991 {
850 next = SvREFCNT_inc (GvSV (coro_idle)); 1992 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1993 SV *data = (SV *)GENSUB_ARG;
851 1994
852 GvSV (coro_current) = SvREFCNT_inc (next); 1995 frame->data = (void *)data;
853 transfer (aTHX_ 1996 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
854 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 1997 frame->check = slf_check_rouse_wait;
855 sv_to_coro (next, "Coro::schedule", "next coroutine"), 1998 }
856 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1999}
2000
2001static SV *
2002coro_new_rouse_cb (pTHX)
2003{
2004 HV *hv = (HV *)SvRV (coro_current);
2005 struct coro *coro = SvSTATE_hv (hv);
2006 SV *data = newRV_inc ((SV *)hv);
2007 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2008
2009 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2010 SvREFCNT_dec (data); /* magicext increases the refcount */
2011
2012 SvREFCNT_dec (coro->rouse_cb);
2013 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2014
2015 return cb;
2016}
2017
2018/*****************************************************************************/
2019/* schedule-like-function opcode (SLF) */
2020
2021static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2022static const CV *slf_cv;
2023static SV **slf_argv;
2024static int slf_argc, slf_arga; /* count, allocated */
2025static I32 slf_ax; /* top of stack, for restore */
2026
2027/* this restores the stack in the case we patched the entersub, to */
2028/* recreate the stack frame as perl will on following calls */
2029/* since entersub cleared the stack */
2030static OP *
2031pp_restore (pTHX)
2032{
2033 int i;
2034 SV **SP = PL_stack_base + slf_ax;
2035
2036 PUSHMARK (SP);
2037
2038 EXTEND (SP, slf_argc + 1);
2039
2040 for (i = 0; i < slf_argc; ++i)
2041 PUSHs (sv_2mortal (slf_argv [i]));
2042
2043 PUSHs ((SV *)CvGV (slf_cv));
2044
2045 RETURNOP (slf_restore.op_first);
2046}
2047
2048static void
2049slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2050{
2051 SV **arg = (SV **)slf_frame.data;
2052
2053 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2054}
2055
2056static void
2057slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2058{
2059 if (items != 2)
2060 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2061
2062 frame->prepare = slf_prepare_transfer;
2063 frame->check = slf_check_nop;
2064 frame->data = (void *)arg; /* let's hope it will stay valid */
2065}
2066
2067static void
2068slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2069{
2070 frame->prepare = prepare_schedule;
2071 frame->check = slf_check_nop;
2072}
2073
2074static void
2075slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2076{
2077 struct coro *next = (struct coro *)slf_frame.data;
2078
857 SvREFCNT_dec (next); 2079 SvREFCNT_inc_NN (next->hv);
2080 prepare_schedule_to (aTHX_ ta, next);
2081}
2082
2083static void
2084slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2085{
2086 if (!items)
2087 croak ("Coro::schedule_to expects a coroutine argument, caught");
2088
2089 frame->data = (void *)SvSTATE (arg [0]);
2090 frame->prepare = slf_prepare_schedule_to;
2091 frame->check = slf_check_nop;
2092}
2093
2094static void
2095slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 api_ready (aTHX_ SvRV (coro_current));
2098
2099 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2100}
2101
2102static void
2103slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2104{
2105 frame->prepare = prepare_cede;
2106 frame->check = slf_check_nop;
2107}
2108
2109static void
2110slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2111{
2112 frame->prepare = prepare_cede_notself;
2113 frame->check = slf_check_nop;
2114}
2115
2116/*
2117 * these not obviously related functions are all rolled into one
2118 * function to increase chances that they all will call transfer with the same
2119 * stack offset
2120 * SLF stands for "schedule-like-function".
2121 */
2122static OP *
2123pp_slf (pTHX)
2124{
2125 I32 checkmark; /* mark SP to see how many elements check has pushed */
2126
2127 /* set up the slf frame, unless it has already been set-up */
2128 /* the latter happens when a new coro has been started */
2129 /* or when a new cctx was attached to an existing coroutine */
2130 if (expect_true (!slf_frame.prepare))
2131 {
2132 /* first iteration */
2133 dSP;
2134 SV **arg = PL_stack_base + TOPMARK + 1;
2135 int items = SP - arg; /* args without function object */
2136 SV *gv = *sp;
2137
2138 /* do a quick consistency check on the "function" object, and if it isn't */
2139 /* for us, divert to the real entersub */
2140 if (SvTYPE (gv) != SVt_PVGV
2141 || !GvCV (gv)
2142 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2143 return PL_ppaddr[OP_ENTERSUB](aTHX);
2144
2145 if (!(PL_op->op_flags & OPf_STACKED))
2146 {
2147 /* ampersand-form of call, use @_ instead of stack */
2148 AV *av = GvAV (PL_defgv);
2149 arg = AvARRAY (av);
2150 items = AvFILLp (av) + 1;
2151 }
2152
2153 /* now call the init function, which needs to set up slf_frame */
2154 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2155 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2156
2157 /* pop args */
2158 SP = PL_stack_base + POPMARK;
2159
2160 PUTBACK;
2161 }
2162
2163 /* now that we have a slf_frame, interpret it! */
2164 /* we use a callback system not to make the code needlessly */
2165 /* complicated, but so we can run multiple perl coros from one cctx */
2166
2167 do
2168 {
2169 struct coro_transfer_args ta;
2170
2171 slf_frame.prepare (aTHX_ &ta);
2172 TRANSFER (ta, 0);
2173
2174 checkmark = PL_stack_sp - PL_stack_base;
2175 }
2176 while (slf_frame.check (aTHX_ &slf_frame));
2177
2178 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2179
2180 /* exception handling */
2181 if (expect_false (CORO_THROW))
2182 {
2183 SV *exception = sv_2mortal (CORO_THROW);
2184
2185 CORO_THROW = 0;
2186 sv_setsv (ERRSV, exception);
2187 croak (0);
2188 }
2189
2190 /* return value handling - mostly like entersub */
2191 /* make sure we put something on the stack in scalar context */
2192 if (GIMME_V == G_SCALAR)
2193 {
2194 dSP;
2195 SV **bot = PL_stack_base + checkmark;
2196
2197 if (sp == bot) /* too few, push undef */
2198 bot [1] = &PL_sv_undef;
2199 else if (sp != bot + 1) /* too many, take last one */
2200 bot [1] = *sp;
2201
2202 SP = bot + 1;
2203
2204 PUTBACK;
2205 }
2206
2207 return NORMAL;
2208}
2209
2210static void
2211api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2212{
2213 int i;
2214 SV **arg = PL_stack_base + ax;
2215 int items = PL_stack_sp - arg + 1;
2216
2217 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2218
2219 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2220 && PL_op->op_ppaddr != pp_slf)
2221 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2222
2223 CvFLAGS (cv) |= CVf_SLF;
2224 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2225 slf_cv = cv;
2226
2227 /* we patch the op, and then re-run the whole call */
2228 /* we have to put the same argument on the stack for this to work */
2229 /* and this will be done by pp_restore */
2230 slf_restore.op_next = (OP *)&slf_restore;
2231 slf_restore.op_type = OP_CUSTOM;
2232 slf_restore.op_ppaddr = pp_restore;
2233 slf_restore.op_first = PL_op;
2234
2235 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2236
2237 if (PL_op->op_flags & OPf_STACKED)
2238 {
2239 if (items > slf_arga)
2240 {
2241 slf_arga = items;
2242 free (slf_argv);
2243 slf_argv = malloc (slf_arga * sizeof (SV *));
2244 }
2245
2246 slf_argc = items;
2247
2248 for (i = 0; i < items; ++i)
2249 slf_argv [i] = SvREFCNT_inc (arg [i]);
2250 }
2251 else
2252 slf_argc = 0;
2253
2254 PL_op->op_ppaddr = pp_slf;
2255 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2256
2257 PL_op = (OP *)&slf_restore;
2258}
2259
2260/*****************************************************************************/
2261/* PerlIO::cede */
2262
2263typedef struct
2264{
2265 PerlIOBuf base;
2266 NV next, every;
2267} PerlIOCede;
2268
2269static IV
2270PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2271{
2272 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2273
2274 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2275 self->next = nvtime () + self->every;
2276
2277 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2278}
2279
2280static SV *
2281PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2282{
2283 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2284
2285 return newSVnv (self->every);
2286}
2287
2288static IV
2289PerlIOCede_flush (pTHX_ PerlIO *f)
2290{
2291 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2292 double now = nvtime ();
2293
2294 if (now >= self->next)
2295 {
2296 api_cede (aTHX);
2297 self->next = now + self->every;
2298 }
2299
2300 return PerlIOBuf_flush (aTHX_ f);
2301}
2302
2303static PerlIO_funcs PerlIO_cede =
2304{
2305 sizeof(PerlIO_funcs),
2306 "cede",
2307 sizeof(PerlIOCede),
2308 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2309 PerlIOCede_pushed,
2310 PerlIOBuf_popped,
2311 PerlIOBuf_open,
2312 PerlIOBase_binmode,
2313 PerlIOCede_getarg,
2314 PerlIOBase_fileno,
2315 PerlIOBuf_dup,
2316 PerlIOBuf_read,
2317 PerlIOBuf_unread,
2318 PerlIOBuf_write,
2319 PerlIOBuf_seek,
2320 PerlIOBuf_tell,
2321 PerlIOBuf_close,
2322 PerlIOCede_flush,
2323 PerlIOBuf_fill,
2324 PerlIOBase_eof,
2325 PerlIOBase_error,
2326 PerlIOBase_clearerr,
2327 PerlIOBase_setlinebuf,
2328 PerlIOBuf_get_base,
2329 PerlIOBuf_bufsiz,
2330 PerlIOBuf_get_ptr,
2331 PerlIOBuf_get_cnt,
2332 PerlIOBuf_set_ptrcnt,
2333};
2334
2335/*****************************************************************************/
2336/* Coro::Semaphore & Coro::Signal */
2337
2338static SV *
2339coro_waitarray_new (pTHX_ int count)
2340{
2341 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2342 AV *av = newAV ();
2343 SV **ary;
2344
2345 /* unfortunately, building manually saves memory */
2346 Newx (ary, 2, SV *);
2347 AvALLOC (av) = ary;
2348 /*AvARRAY (av) = ary;*/
2349 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2350 AvMAX (av) = 1;
2351 AvFILLp (av) = 0;
2352 ary [0] = newSViv (count);
2353
2354 return newRV_noinc ((SV *)av);
2355}
2356
2357/* semaphore */
2358
2359static void
2360coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2361{
2362 SV *count_sv = AvARRAY (av)[0];
2363 IV count = SvIVX (count_sv);
2364
2365 count += adjust;
2366 SvIVX (count_sv) = count;
2367
2368 /* now wake up as many waiters as are expected to lock */
2369 while (count > 0 && AvFILLp (av) > 0)
2370 {
2371 SV *cb;
2372
2373 /* swap first two elements so we can shift a waiter */
2374 AvARRAY (av)[0] = AvARRAY (av)[1];
2375 AvARRAY (av)[1] = count_sv;
2376 cb = av_shift (av);
2377
2378 if (SvOBJECT (cb))
2379 {
2380 api_ready (aTHX_ cb);
2381 --count;
2382 }
2383 else if (SvTYPE (cb) == SVt_PVCV)
2384 {
2385 dSP;
2386 PUSHMARK (SP);
2387 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2388 PUTBACK;
2389 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2390 }
2391
2392 SvREFCNT_dec (cb);
2393 }
2394}
2395
2396static void
2397coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2398{
2399 /* call $sem->adjust (0) to possibly wake up some other waiters */
2400 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2401}
2402
2403static int
2404slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2405{
2406 AV *av = (AV *)frame->data;
2407 SV *count_sv = AvARRAY (av)[0];
2408
2409 /* if we are about to throw, don't actually acquire the lock, just throw */
2410 if (CORO_THROW)
2411 return 0;
2412 else if (SvIVX (count_sv) > 0)
2413 {
2414 SvSTATE_current->on_destroy = 0;
2415
2416 if (acquire)
2417 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2418 else
2419 coro_semaphore_adjust (aTHX_ av, 0);
2420
2421 return 0;
2422 }
2423 else
2424 {
2425 int i;
2426 /* if we were woken up but can't down, we look through the whole */
2427 /* waiters list and only add us if we aren't in there already */
2428 /* this avoids some degenerate memory usage cases */
2429
2430 for (i = 1; i <= AvFILLp (av); ++i)
2431 if (AvARRAY (av)[i] == SvRV (coro_current))
2432 return 1;
2433
2434 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2435 return 1;
2436 }
2437}
2438
2439static int
2440slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2441{
2442 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2443}
2444
2445static int
2446slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2447{
2448 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2449}
2450
2451static void
2452slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2453{
2454 AV *av = (AV *)SvRV (arg [0]);
2455
2456 if (SvIVX (AvARRAY (av)[0]) > 0)
2457 {
2458 frame->data = (void *)av;
2459 frame->prepare = prepare_nop;
2460 }
2461 else
2462 {
2463 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2464
2465 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2466 frame->prepare = prepare_schedule;
2467
2468 /* to avoid race conditions when a woken-up coro gets terminated */
2469 /* we arrange for a temporary on_destroy that calls adjust (0) */
2470 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2471 }
2472}
2473
2474static void
2475slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2476{
2477 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2478 frame->check = slf_check_semaphore_down;
2479}
2480
2481static void
2482slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2483{
2484 if (items >= 2)
2485 {
2486 /* callback form */
2487 AV *av = (AV *)SvRV (arg [0]);
2488 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2489
2490 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2491
2492 if (SvIVX (AvARRAY (av)[0]) > 0)
2493 coro_semaphore_adjust (aTHX_ av, 0);
2494
2495 frame->prepare = prepare_nop;
2496 frame->check = slf_check_nop;
2497 }
2498 else
2499 {
2500 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2501 frame->check = slf_check_semaphore_wait;
2502 }
2503}
2504
2505/* signal */
2506
2507static void
2508coro_signal_wake (pTHX_ AV *av, int count)
2509{
2510 SvIVX (AvARRAY (av)[0]) = 0;
2511
2512 /* now signal count waiters */
2513 while (count > 0 && AvFILLp (av) > 0)
2514 {
2515 SV *cb;
2516
2517 /* swap first two elements so we can shift a waiter */
2518 cb = AvARRAY (av)[0];
2519 AvARRAY (av)[0] = AvARRAY (av)[1];
2520 AvARRAY (av)[1] = cb;
2521
2522 cb = av_shift (av);
2523
2524 api_ready (aTHX_ cb);
2525 sv_setiv (cb, 0); /* signal waiter */
2526 SvREFCNT_dec (cb);
2527
2528 --count;
2529 }
2530}
2531
2532static int
2533slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2534{
2535 /* if we are about to throw, also stop waiting */
2536 return SvROK ((SV *)frame->data) && !CORO_THROW;
2537}
2538
2539static void
2540slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2541{
2542 AV *av = (AV *)SvRV (arg [0]);
2543
2544 if (SvIVX (AvARRAY (av)[0]))
2545 {
2546 SvIVX (AvARRAY (av)[0]) = 0;
2547 frame->prepare = prepare_nop;
2548 frame->check = slf_check_nop;
2549 }
2550 else
2551 {
2552 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2553
2554 av_push (av, waiter);
2555
2556 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2557 frame->prepare = prepare_schedule;
2558 frame->check = slf_check_signal_wait;
2559 }
2560}
2561
2562/*****************************************************************************/
2563/* Coro::AIO */
2564
2565#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2566
2567/* helper storage struct */
2568struct io_state
2569{
2570 int errorno;
2571 I32 laststype; /* U16 in 5.10.0 */
2572 int laststatval;
2573 Stat_t statcache;
2574};
2575
2576static void
2577coro_aio_callback (pTHX_ CV *cv)
2578{
2579 dXSARGS;
2580 AV *state = (AV *)GENSUB_ARG;
2581 SV *coro = av_pop (state);
2582 SV *data_sv = newSV (sizeof (struct io_state));
2583
2584 av_extend (state, items - 1);
2585
2586 sv_upgrade (data_sv, SVt_PV);
2587 SvCUR_set (data_sv, sizeof (struct io_state));
2588 SvPOK_only (data_sv);
2589
2590 {
2591 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2592
2593 data->errorno = errno;
2594 data->laststype = PL_laststype;
2595 data->laststatval = PL_laststatval;
2596 data->statcache = PL_statcache;
2597 }
2598
2599 /* now build the result vector out of all the parameters and the data_sv */
2600 {
2601 int i;
2602
2603 for (i = 0; i < items; ++i)
2604 av_push (state, SvREFCNT_inc_NN (ST (i)));
2605 }
2606
2607 av_push (state, data_sv);
2608
2609 api_ready (aTHX_ coro);
858 SvREFCNT_dec (prev); 2610 SvREFCNT_dec (coro);
2611 SvREFCNT_dec ((AV *)state);
859} 2612}
860 2613
2614static int
2615slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2616{
2617 AV *state = (AV *)frame->data;
2618
2619 /* if we are about to throw, return early */
2620 /* this does not cancel the aio request, but at least */
2621 /* it quickly returns */
2622 if (CORO_THROW)
2623 return 0;
2624
2625 /* one element that is an RV? repeat! */
2626 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2627 return 1;
2628
2629 /* restore status */
2630 {
2631 SV *data_sv = av_pop (state);
2632 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2633
2634 errno = data->errorno;
2635 PL_laststype = data->laststype;
2636 PL_laststatval = data->laststatval;
2637 PL_statcache = data->statcache;
2638
2639 SvREFCNT_dec (data_sv);
2640 }
2641
2642 /* push result values */
2643 {
2644 dSP;
2645 int i;
2646
2647 EXTEND (SP, AvFILLp (state) + 1);
2648 for (i = 0; i <= AvFILLp (state); ++i)
2649 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2650
2651 PUTBACK;
2652 }
2653
2654 return 0;
2655}
2656
2657static void
2658slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2659{
2660 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2661 SV *coro_hv = SvRV (coro_current);
2662 struct coro *coro = SvSTATE_hv (coro_hv);
2663
2664 /* put our coroutine id on the state arg */
2665 av_push (state, SvREFCNT_inc_NN (coro_hv));
2666
2667 /* first see whether we have a non-zero priority and set it as AIO prio */
2668 if (coro->prio)
2669 {
2670 dSP;
2671
2672 static SV *prio_cv;
2673 static SV *prio_sv;
2674
2675 if (expect_false (!prio_cv))
2676 {
2677 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2678 prio_sv = newSViv (0);
2679 }
2680
2681 PUSHMARK (SP);
2682 sv_setiv (prio_sv, coro->prio);
2683 XPUSHs (prio_sv);
2684
2685 PUTBACK;
2686 call_sv (prio_cv, G_VOID | G_DISCARD);
2687 }
2688
2689 /* now call the original request */
2690 {
2691 dSP;
2692 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2693 int i;
2694
2695 PUSHMARK (SP);
2696
2697 /* first push all args to the stack */
2698 EXTEND (SP, items + 1);
2699
2700 for (i = 0; i < items; ++i)
2701 PUSHs (arg [i]);
2702
2703 /* now push the callback closure */
2704 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2705
2706 /* now call the AIO function - we assume our request is uncancelable */
2707 PUTBACK;
2708 call_sv ((SV *)req, G_VOID | G_DISCARD);
2709 }
2710
2711 /* now that the requets is going, we loop toll we have a result */
2712 frame->data = (void *)state;
2713 frame->prepare = prepare_schedule;
2714 frame->check = slf_check_aio_req;
2715}
2716
2717static void
2718coro_aio_req_xs (pTHX_ CV *cv)
2719{
2720 dXSARGS;
2721
2722 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2723
2724 XSRETURN_EMPTY;
2725}
2726
2727/*****************************************************************************/
2728
861MODULE = Coro::State PACKAGE = Coro::State 2729MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
862 2730
863PROTOTYPES: ENABLE 2731PROTOTYPES: DISABLE
864 2732
865BOOT: 2733BOOT:
866{ /* {} necessary for stoopid perl-5.6.x */ 2734{
867 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2735#ifdef USE_ITHREADS
868 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2736# if CORO_PTHREAD
2737 coro_thx = PERL_GET_CONTEXT;
2738# endif
2739#endif
2740 BOOT_PAGESIZE;
2741
2742 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2743 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2744
2745 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2746 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2747 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2748
2749 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2750 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2751 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2752
869 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2753 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
870 2754
871 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2755 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
872 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2756 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
873 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2757 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
874 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2758 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
875
876 if (!padlist_cache)
877 padlist_cache = newHV ();
878 2759
879 main_mainstack = PL_mainstack; 2760 main_mainstack = PL_mainstack;
2761 main_top_env = PL_top_env;
880 2762
2763 while (main_top_env->je_prev)
2764 main_top_env = main_top_env->je_prev;
2765
2766 {
2767 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2768
2769 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2770 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2771
2772 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2773 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2774 }
2775
881 coroapi.ver = CORO_API_VERSION; 2776 coroapi.ver = CORO_API_VERSION;
2777 coroapi.rev = CORO_API_REVISION;
2778
882 coroapi.transfer = api_transfer; 2779 coroapi.transfer = api_transfer;
883}
884 2780
885Coro::State 2781 coroapi.sv_state = SvSTATE_;
886_newprocess(args) 2782 coroapi.execute_slf = api_execute_slf;
887 SV * args 2783 coroapi.prepare_nop = prepare_nop;
888 PROTOTYPE: $ 2784 coroapi.prepare_schedule = prepare_schedule;
2785 coroapi.prepare_cede = prepare_cede;
2786 coroapi.prepare_cede_notself = prepare_cede_notself;
2787
2788 {
2789 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2790
2791 if (!svp) croak ("Time::HiRes is required");
2792 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2793
2794 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2795 }
2796
2797 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2798}
2799
2800SV *
2801new (char *klass, ...)
2802 ALIAS:
2803 Coro::new = 1
889 CODE: 2804 CODE:
890 Coro__State coro; 2805{
2806 struct coro *coro;
2807 MAGIC *mg;
2808 HV *hv;
2809 CV *cb;
2810 int i;
891 2811
892 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2812 if (items > 1)
893 croak ("Coro::State::_newprocess expects an arrayref");
894 2813 {
2814 cb = coro_sv_2cv (aTHX_ ST (1));
2815
2816 if (!ix)
2817 {
2818 if (CvISXSUB (cb))
2819 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2820
2821 if (!CvROOT (cb))
2822 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2823 }
2824 }
2825
895 New (0, coro, 1, struct coro); 2826 Newz (0, coro, 1, struct coro);
2827 coro->args = newAV ();
2828 coro->flags = CF_NEW;
896 2829
897 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2830 if (coro_first) coro_first->prev = coro;
898 coro->mainstack = 0; /* actual work is done inside transfer */ 2831 coro->next = coro_first;
899 coro->stack = 0; 2832 coro_first = coro;
900 2833
901 RETVAL = coro; 2834 coro->hv = hv = newHV ();
2835 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2836 mg->mg_flags |= MGf_DUP;
2837 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2838
2839 if (items > 1)
2840 {
2841 av_extend (coro->args, items - 1 + ix - 1);
2842
2843 if (ix)
2844 {
2845 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2846 cb = cv_coro_run;
2847 }
2848
2849 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2850
2851 for (i = 2; i < items; i++)
2852 av_push (coro->args, newSVsv (ST (i)));
2853 }
2854}
902 OUTPUT: 2855 OUTPUT:
903 RETVAL 2856 RETVAL
904 2857
905void 2858void
906transfer(prev, next, flags) 2859transfer (...)
907 Coro::State_or_hashref prev
908 Coro::State_or_hashref next
909 int flags
910 PROTOTYPE: @ 2860 PROTOTYPE: $$
911 CODE: 2861 CODE:
912 PUTBACK; 2862 CORO_EXECUTE_SLF_XS (slf_init_transfer);
913 transfer (aTHX_ prev, next, flags); 2863
914 SPAGAIN; 2864bool
2865_destroy (SV *coro_sv)
2866 CODE:
2867 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2868 OUTPUT:
2869 RETVAL
915 2870
916void 2871void
917DESTROY(coro) 2872_exit (int code)
918 Coro::State coro 2873 PROTOTYPE: $
919 CODE: 2874 CODE:
2875 _exit (code);
920 2876
921 if (coro->mainstack && coro->mainstack != main_mainstack) 2877int
2878cctx_stacksize (int new_stacksize = 0)
2879 PROTOTYPE: ;$
2880 CODE:
2881 RETVAL = cctx_stacksize;
2882 if (new_stacksize)
2883 {
2884 cctx_stacksize = new_stacksize;
2885 ++cctx_gen;
2886 }
2887 OUTPUT:
2888 RETVAL
2889
2890int
2891cctx_max_idle (int max_idle = 0)
2892 PROTOTYPE: ;$
2893 CODE:
2894 RETVAL = cctx_max_idle;
2895 if (max_idle > 1)
2896 cctx_max_idle = max_idle;
2897 OUTPUT:
2898 RETVAL
2899
2900int
2901cctx_count ()
2902 PROTOTYPE:
2903 CODE:
2904 RETVAL = cctx_count;
2905 OUTPUT:
2906 RETVAL
2907
2908int
2909cctx_idle ()
2910 PROTOTYPE:
2911 CODE:
2912 RETVAL = cctx_idle;
2913 OUTPUT:
2914 RETVAL
2915
2916void
2917list ()
2918 PROTOTYPE:
2919 PPCODE:
2920{
2921 struct coro *coro;
2922 for (coro = coro_first; coro; coro = coro->next)
2923 if (coro->hv)
2924 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2925}
2926
2927void
2928call (Coro::State coro, SV *coderef)
2929 ALIAS:
2930 eval = 1
2931 CODE:
2932{
2933 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
922 { 2934 {
923 struct coro temp; 2935 struct coro temp;
924 2936
925 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2937 if (!(coro->flags & CF_RUNNING))
926 LOAD(aTHX_ coro); 2938 {
2939 PUTBACK;
2940 save_perl (aTHX_ &temp);
2941 load_perl (aTHX_ coro);
2942 }
927 2943
928 destroy_stacks (aTHX); 2944 {
2945 dSP;
2946 ENTER;
2947 SAVETMPS;
2948 PUTBACK;
2949 PUSHSTACK;
2950 PUSHMARK (SP);
929 2951
930 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2952 if (ix)
2953 eval_sv (coderef, 0);
2954 else
2955 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
931 2956
932 coro->mainstack = 0; 2957 POPSTACK;
2958 SPAGAIN;
2959 FREETMPS;
2960 LEAVE;
2961 PUTBACK;
2962 }
2963
2964 if (!(coro->flags & CF_RUNNING))
2965 {
2966 save_perl (aTHX_ coro);
2967 load_perl (aTHX_ &temp);
2968 SPAGAIN;
2969 }
933 } 2970 }
2971}
934 2972
935 deallocate_stack (coro); 2973SV *
936 2974is_ready (Coro::State coro)
937 Safefree (coro); 2975 PROTOTYPE: $
2976 ALIAS:
2977 is_ready = CF_READY
2978 is_running = CF_RUNNING
2979 is_new = CF_NEW
2980 is_destroyed = CF_DESTROYED
2981 CODE:
2982 RETVAL = boolSV (coro->flags & ix);
2983 OUTPUT:
2984 RETVAL
938 2985
939void 2986void
940flush() 2987throw (Coro::State self, SV *throw = &PL_sv_undef)
941 CODE: 2988 PROTOTYPE: $;$
942#ifdef MAY_FLUSH 2989 CODE:
943 flush_padlist_cache (); 2990{
944#endif 2991 struct coro *current = SvSTATE_current;
2992 SV **throwp = self == current ? &CORO_THROW : &self->except;
2993 SvREFCNT_dec (*throwp);
2994 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2995}
945 2996
946void 2997void
947_exit(code) 2998api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
948 int code 2999 PROTOTYPE: $;$
3000 C_ARGS: aTHX_ coro, flags
3001
3002SV *
3003has_cctx (Coro::State coro)
949 PROTOTYPE: $ 3004 PROTOTYPE: $
950 CODE: 3005 CODE:
951#if defined(__GLIBC__) || _POSIX_C_SOURCE 3006 RETVAL = boolSV (!!coro->cctx);
952 _exit (code); 3007 OUTPUT:
953#else 3008 RETVAL
954 signal (SIGTERM, SIG_DFL);
955 raise (SIGTERM);
956 exit (code);
957#endif
958 3009
959MODULE = Coro::State PACKAGE = Coro::Cont 3010int
3011is_traced (Coro::State coro)
3012 PROTOTYPE: $
3013 CODE:
3014 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3015 OUTPUT:
3016 RETVAL
960 3017
961# this is slightly dirty (should expose a c-level api) 3018UV
3019rss (Coro::State coro)
3020 PROTOTYPE: $
3021 ALIAS:
3022 usecount = 1
3023 CODE:
3024 switch (ix)
3025 {
3026 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3027 case 1: RETVAL = coro->usecount; break;
3028 }
3029 OUTPUT:
3030 RETVAL
962 3031
963void 3032void
964yield(...) 3033force_cctx ()
3034 PROTOTYPE:
3035 CODE:
3036 SvSTATE_current->cctx->idle_sp = 0;
3037
3038void
3039swap_defsv (Coro::State self)
965 PROTOTYPE: @ 3040 PROTOTYPE: $
3041 ALIAS:
3042 swap_defav = 1
966 CODE: 3043 CODE:
967 static SV *returnstk; 3044 if (!self->slot)
968 SV *sv; 3045 croak ("cannot swap state with coroutine that has no saved state,");
969 AV *defav = GvAV (PL_defgv); 3046 else
970 struct coro *prev, *next; 3047 {
3048 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3049 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
971 3050
972 if (!returnstk) 3051 SV *tmp = *src; *src = *dst; *dst = tmp;
973 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 3052 }
974 3053
975 /* set up @_ -- ugly */
976 av_clear (defav);
977 av_fill (defav, items - 1);
978 while (items--)
979 av_store (defav, items, SvREFCNT_inc (ST(items)));
980
981 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
982 sv = av_pop ((AV *)SvRV (returnstk));
983 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
984 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
985 SvREFCNT_dec (sv);
986
987 transfer(aTHX_ prev, next, 0);
988 3054
989MODULE = Coro::State PACKAGE = Coro 3055MODULE = Coro::State PACKAGE = Coro
990 3056
991# this is slightly dirty (should expose a c-level api)
992
993BOOT: 3057BOOT:
994{ 3058{
995 int i; 3059 int i;
3060
3061 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3062 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3063 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3064 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3065 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3066 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3067 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3068 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3069
3070 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3071 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3072 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3073 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3074
996 HV *stash = gv_stashpv ("Coro", TRUE); 3075 coro_stash = gv_stashpv ("Coro", TRUE);
997 3076
998 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3077 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
999 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3078 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1000 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3079 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1001 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3080 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1002 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3081 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1003 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3082 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1004
1005 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1006 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1007 3083
1008 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3084 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1009 coro_ready[i] = newAV (); 3085 coro_ready[i] = newAV ();
1010 3086
1011 { 3087 {
1012 SV *sv = perl_get_sv("Coro::API", 1); 3088 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1013 3089
1014 coroapi.schedule = api_schedule; 3090 coroapi.schedule = api_schedule;
3091 coroapi.schedule_to = api_schedule_to;
3092 coroapi.cede = api_cede;
3093 coroapi.cede_notself = api_cede_notself;
1015 coroapi.ready = api_ready; 3094 coroapi.ready = api_ready;
3095 coroapi.is_ready = api_is_ready;
1016 coroapi.nready = &coro_nready; 3096 coroapi.nready = coro_nready;
1017 coroapi.current = coro_current; 3097 coroapi.current = coro_current;
1018 3098
1019 GCoroAPI = &coroapi; 3099 /*GCoroAPI = &coroapi;*/
1020 sv_setiv(sv, (IV)&coroapi); 3100 sv_setiv (sv, (IV)&coroapi);
1021 SvREADONLY_on(sv); 3101 SvREADONLY_on (sv);
1022 } 3102 }
1023} 3103}
1024 3104
1025void 3105void
1026ready(self) 3106terminate (...)
1027 SV * self
1028 CODE: 3107 CODE:
1029 api_ready (self); 3108 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3109
3110void
3111schedule (...)
3112 CODE:
3113 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3114
3115void
3116schedule_to (...)
3117 CODE:
3118 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3119
3120void
3121cede_to (...)
3122 CODE:
3123 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3124
3125void
3126cede (...)
3127 CODE:
3128 CORO_EXECUTE_SLF_XS (slf_init_cede);
3129
3130void
3131cede_notself (...)
3132 CODE:
3133 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3134
3135void
3136_cancel (Coro::State self)
3137 CODE:
3138 coro_state_destroy (aTHX_ self);
3139 coro_call_on_destroy (aTHX_ self);
3140
3141void
3142_set_current (SV *current)
3143 PROTOTYPE: $
3144 CODE:
3145 SvREFCNT_dec (SvRV (coro_current));
3146 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3147
3148void
3149_set_readyhook (SV *hook)
3150 PROTOTYPE: $
3151 CODE:
3152 SvREFCNT_dec (coro_readyhook);
3153 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1030 3154
1031int 3155int
3156prio (Coro::State coro, int newprio = 0)
3157 PROTOTYPE: $;$
3158 ALIAS:
3159 nice = 1
3160 CODE:
3161{
3162 RETVAL = coro->prio;
3163
3164 if (items > 1)
3165 {
3166 if (ix)
3167 newprio = coro->prio - newprio;
3168
3169 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3170 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3171
3172 coro->prio = newprio;
3173 }
3174}
3175 OUTPUT:
3176 RETVAL
3177
3178SV *
3179ready (SV *self)
3180 PROTOTYPE: $
3181 CODE:
3182 RETVAL = boolSV (api_ready (aTHX_ self));
3183 OUTPUT:
3184 RETVAL
3185
3186int
1032nready(...) 3187nready (...)
1033 PROTOTYPE: 3188 PROTOTYPE:
1034 CODE: 3189 CODE:
1035 RETVAL = coro_nready; 3190 RETVAL = coro_nready;
1036 OUTPUT: 3191 OUTPUT:
1037 RETVAL 3192 RETVAL
1038 3193
1039void 3194void
1040schedule(...) 3195_pool_handler (...)
1041 PROTOTYPE:
1042 ALIAS:
1043 cede = 1
1044 CODE: 3196 CODE:
1045 api_schedule (ix); 3197 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1046 3198
3199void
3200async_pool (SV *cv, ...)
3201 PROTOTYPE: &@
3202 PPCODE:
3203{
3204 HV *hv = (HV *)av_pop (av_async_pool);
3205 AV *av = newAV ();
3206 SV *cb = ST (0);
3207 int i;
3208
3209 av_extend (av, items - 2);
3210 for (i = 1; i < items; ++i)
3211 av_push (av, SvREFCNT_inc_NN (ST (i)));
3212
3213 if ((SV *)hv == &PL_sv_undef)
3214 {
3215 PUSHMARK (SP);
3216 EXTEND (SP, 2);
3217 PUSHs (sv_Coro);
3218 PUSHs ((SV *)cv_pool_handler);
3219 PUTBACK;
3220 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3221 SPAGAIN;
3222
3223 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3224 }
3225
3226 {
3227 struct coro *coro = SvSTATE_hv (hv);
3228
3229 assert (!coro->invoke_cb);
3230 assert (!coro->invoke_av);
3231 coro->invoke_cb = SvREFCNT_inc (cb);
3232 coro->invoke_av = av;
3233 }
3234
3235 api_ready (aTHX_ (SV *)hv);
3236
3237 if (GIMME_V != G_VOID)
3238 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3239 else
3240 SvREFCNT_dec (hv);
3241}
3242
3243SV *
3244rouse_cb ()
3245 PROTOTYPE:
3246 CODE:
3247 RETVAL = coro_new_rouse_cb (aTHX);
3248 OUTPUT:
3249 RETVAL
3250
3251void
3252rouse_wait (...)
3253 PROTOTYPE: ;$
3254 PPCODE:
3255 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3256
3257
3258MODULE = Coro::State PACKAGE = PerlIO::cede
3259
3260BOOT:
3261 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3262
3263
3264MODULE = Coro::State PACKAGE = Coro::Semaphore
3265
3266SV *
3267new (SV *klass, SV *count = 0)
3268 CODE:
3269 RETVAL = sv_bless (
3270 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3271 GvSTASH (CvGV (cv))
3272 );
3273 OUTPUT:
3274 RETVAL
3275
3276# helper for Coro::Channel
3277SV *
3278_alloc (int count)
3279 CODE:
3280 RETVAL = coro_waitarray_new (aTHX_ count);
3281 OUTPUT:
3282 RETVAL
3283
3284SV *
3285count (SV *self)
3286 CODE:
3287 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3288 OUTPUT:
3289 RETVAL
3290
3291void
3292up (SV *self, int adjust = 1)
3293 ALIAS:
3294 adjust = 1
3295 CODE:
3296 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3297
3298void
3299down (...)
3300 CODE:
3301 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3302
3303void
3304wait (...)
3305 CODE:
3306 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3307
3308void
3309try (SV *self)
3310 PPCODE:
3311{
3312 AV *av = (AV *)SvRV (self);
3313 SV *count_sv = AvARRAY (av)[0];
3314 IV count = SvIVX (count_sv);
3315
3316 if (count > 0)
3317 {
3318 --count;
3319 SvIVX (count_sv) = count;
3320 XSRETURN_YES;
3321 }
3322 else
3323 XSRETURN_NO;
3324}
3325
3326void
3327waiters (SV *self)
3328 PPCODE:
3329{
3330 AV *av = (AV *)SvRV (self);
3331 int wcount = AvFILLp (av) + 1 - 1;
3332
3333 if (GIMME_V == G_SCALAR)
3334 XPUSHs (sv_2mortal (newSViv (wcount)));
3335 else
3336 {
3337 int i;
3338 EXTEND (SP, wcount);
3339 for (i = 1; i <= wcount; ++i)
3340 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3341 }
3342}
3343
3344MODULE = Coro::State PACKAGE = Coro::Signal
3345
3346SV *
3347new (SV *klass)
3348 CODE:
3349 RETVAL = sv_bless (
3350 coro_waitarray_new (aTHX_ 0),
3351 GvSTASH (CvGV (cv))
3352 );
3353 OUTPUT:
3354 RETVAL
3355
3356void
3357wait (...)
3358 CODE:
3359 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3360
3361void
3362broadcast (SV *self)
3363 CODE:
3364{
3365 AV *av = (AV *)SvRV (self);
3366 coro_signal_wake (aTHX_ av, AvFILLp (av));
3367}
3368
3369void
3370send (SV *self)
3371 CODE:
3372{
3373 AV *av = (AV *)SvRV (self);
3374
3375 if (AvFILLp (av))
3376 coro_signal_wake (aTHX_ av, 1);
3377 else
3378 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3379}
3380
3381IV
3382awaited (SV *self)
3383 CODE:
3384 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3385 OUTPUT:
3386 RETVAL
3387
3388
3389MODULE = Coro::State PACKAGE = Coro::AnyEvent
3390
3391BOOT:
3392 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3393
3394void
3395_schedule (...)
3396 CODE:
3397{
3398 static int incede;
3399
3400 api_cede_notself (aTHX);
3401
3402 ++incede;
3403 while (coro_nready >= incede && api_cede (aTHX))
3404 ;
3405
3406 sv_setsv (sv_activity, &PL_sv_undef);
3407 if (coro_nready >= incede)
3408 {
3409 PUSHMARK (SP);
3410 PUTBACK;
3411 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3412 }
3413
3414 --incede;
3415}
3416
3417
3418MODULE = Coro::State PACKAGE = Coro::AIO
3419
3420void
3421_register (char *target, char *proto, SV *req)
3422 CODE:
3423{
3424 CV *req_cv = coro_sv_2cv (aTHX_ req);
3425 /* newXSproto doesn't return the CV on 5.8 */
3426 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3427 sv_setpv ((SV *)slf_cv, proto);
3428 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3429}
3430

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