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Comparing Coro/Coro/State.xs (file contents):
Revision 1.33 by root, Sun Aug 26 21:44:20 2001 UTC vs.
Revision 1.286 by root, Mon Nov 17 04:19:49 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
6 12
7#include <signal.h> 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
19#endif 43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
20 48
21#define MAY_FLUSH /* increases codesize and is rarely used */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
22 52
23#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 54static int cctx_max_idle = 4;
25 55
26/* The next macro should declare a variable stacklevel that contains and approximation 56#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 57 (PERL_REVISION > (a) \
28 * and should be unique. */ 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#if __GNUC__ >= 4
122# define dSTACKLEVEL void *stacklevel = __builtin_frame_address (0)
123#else
29#define dSTACKLEVEL void *stacklevel = &stacklevel 124# define dSTACKLEVEL volatile void *stacklevel = (volatile void *)&stacklevel
125#endif
30 126
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define expect(expr,value) __builtin_expect ((expr),(value))
132# define INLINE static inline
133#else
134# define attribute(x)
135# define expect(expr,value) (expr)
136# define INLINE static
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
32 143
33#include "CoroAPI.h" 144#include "CoroAPI.h"
34 145
146#ifdef USE_ITHREADS
147# if CORO_PTHREAD
148static void *coro_thx;
149# endif
150#endif
151
152/* helper storage struct for Coro::AIO */
153struct io_state
154{
155 AV *res;
156 int errorno;
157 I32 laststype; /* U16 in 5.10.0 */
158 int laststatval;
159 Stat_t statcache;
160};
161
162static double (*nvtime)(); /* so why doesn't it take void? */
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 171
37/* this is actually not only the c stack but also c registers etc... */ 172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
186static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle;
188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
198/* this is a structure representing a c-level coroutine */
38typedef struct { 199typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 200{
40 int usecnt; /* shared by how many coroutines */ 201 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 202
203 /* the stack */
204 void *sptr;
205 size_t ssize;
206
207 /* cpu state */
208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
210 JMPENV *top_env;
43 coro_context cctx; 211 coro_context cctx;
44 212
45 void *sptr; 213 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 214#if CORO_USE_VALGRIND
47} coro_stack; 215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
48 219
220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct
229{
230 SV *defsv;
231 AV *defav;
232 SV *errsv;
233 SV *irsgv;
234#define VAR(name,type) type name;
235# include "state.h"
236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
49struct coro { 242struct coro {
50 /* the optional C context */ 243 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 244 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 245
55 /* optionally saved, might be zero */ 246 /* state data */
56 AV *defav; 247 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; 248 AV *mainstack;
68 SV **stack_sp; 249 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;
91 250
92 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
256
257 /* statistics */
258 int usecount; /* number of transfers to this coro */
259
260 /* coro process data */
261 int prio;
262 SV *throw; /* exception to be thrown */
263
264 /* async_pool */
265 SV *saved_deffh;
266
267 /* linked list */
268 struct coro *next, *prev;
94}; 269};
95 270
96typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
98 273
99static AV *main_mainstack; /* used to differentiate between $main and others */ 274/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
101static SV *ucoro_state_sv; 278static SV *coro_throw;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104
105/* mostly copied from op.c:cv_clone2 */
106STATIC AV *
107clone_padlist (AV *protopadlist)
108{
109 AV *av;
110 I32 ix;
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113 SV **pname = AvARRAY (protopad_name);
114 SV **ppad = AvARRAY (protopad);
115 I32 fname = AvFILLp (protopad_name);
116 I32 fpad = AvFILLp (protopad);
117 AV *newpadlist, *newpad_name, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127
128 newpadlist = newAV ();
129 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name);
131 av_store (newpadlist, 1, (SV *) newpad);
132
133 av = newAV (); /* will be @_ */
134 av_extend (av, 0);
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137
138 for (ix = fpad; ix > 0; ix--)
139 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
141 if (namesv && namesv != &PL_sv_undef)
142 {
143 char *name = SvPVX (namesv); /* XXX */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
145 { /* lexical from outside? */
146 npad[ix] = SvREFCNT_inc (ppad[ix]);
147 }
148 else
149 { /* our own lexical */
150 SV *sv;
151 if (*name == '&')
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175
176#if 0 /* return -ENOTUNDERSTOOD */
177 /* Now that vars are all in place, clone nested closures. */
178
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC void
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316
317 {
318 dSP;
319 CV *cv;
320
321 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs))
323 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist;
330#ifdef USE_THREADS
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 }
337
338 PUTBACK;
339 }
340}
341
342static void
343save_state(pTHX_ Coro__State c, int flags)
344{
345 {
346 dSP;
347 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo;
350
351 /*
352 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :(
354 */
355
356 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */
358 for (;;)
359 {
360 while (cxix >= 0)
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
397 if (top_si->si_type == PERLSI_MAIN)
398 break;
399
400 top_si = top_si->si_prev;
401 ccstk = top_si->si_cxstack;
402 cxix = top_si->si_cxix;
403 }
404
405 PUTBACK;
406 }
407
408 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
409 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
410 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
411
412 c->dowarn = PL_dowarn;
413 c->in_eval = PL_in_eval;
414
415 c->curstackinfo = PL_curstackinfo;
416 c->curstack = PL_curstack;
417 c->mainstack = PL_mainstack;
418 c->stack_sp = PL_stack_sp;
419 c->op = PL_op;
420 c->curpad = PL_curpad;
421 c->stack_base = PL_stack_base;
422 c->stack_max = PL_stack_max;
423 c->tmps_stack = PL_tmps_stack;
424 c->tmps_floor = PL_tmps_floor;
425 c->tmps_ix = PL_tmps_ix;
426 c->tmps_max = PL_tmps_max;
427 c->markstack = PL_markstack;
428 c->markstack_ptr = PL_markstack_ptr;
429 c->markstack_max = PL_markstack_max;
430 c->scopestack = PL_scopestack;
431 c->scopestack_ix = PL_scopestack_ix;
432 c->scopestack_max = PL_scopestack_max;
433 c->savestack = PL_savestack;
434 c->savestack_ix = PL_savestack_ix;
435 c->savestack_max = PL_savestack_max;
436 c->retstack = PL_retstack;
437 c->retstack_ix = PL_retstack_ix;
438 c->retstack_max = PL_retstack_max;
439 c->curcop = PL_curcop;
440 c->top_env = PL_top_env;
441}
442
443/*
444 * allocate various perl stacks. This is an exact copy
445 * of perl.c:init_stacks, except that it uses less memory
446 * on the assumption that coroutines do not usually need
447 * a lot of stackspace.
448 */
449STATIC void
450coro_init_stacks (pTHX)
451{
452 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
453 PL_curstackinfo->si_type = PERLSI_MAIN;
454 PL_curstack = PL_curstackinfo->si_stack;
455 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456
457 PL_stack_base = AvARRAY(PL_curstack);
458 PL_stack_sp = PL_stack_base;
459 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460
461 New(50,PL_tmps_stack,96,SV*);
462 PL_tmps_floor = -1;
463 PL_tmps_ix = -1;
464 PL_tmps_max = 96;
465
466 New(54,PL_markstack,16,I32);
467 PL_markstack_ptr = PL_markstack;
468 PL_markstack_max = PL_markstack + 16;
469
470 SET_MARK_OFFSET;
471
472 New(54,PL_scopestack,16,I32);
473 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16;
475
476 New(54,PL_savestack,96,ANY);
477 PL_savestack_ix = 0;
478 PL_savestack_max = 96;
479
480 New(54,PL_retstack,8,OP*);
481 PL_retstack_ix = 0;
482 PL_retstack_max = 8;
483}
484
485/*
486 * destroy the stacks, the callchain etc...
487 * still there is a memleak of 128 bytes...
488 */
489STATIC void
490destroy_stacks(pTHX)
491{
492 int destruct = PL_main_cv != Nullcv;
493
494 if (destruct)
495 {
496 /* is this ugly, I ask? */
497 while (PL_scopestack_ix)
498 LEAVE;
499
500 /* sure it is, but more important: is it correct?? :/ */
501 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502 FREETMPS;
503 }
504
505 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next;
507
508 while (PL_curstackinfo)
509 {
510 PERL_SI *p = PL_curstackinfo->si_prev;
511
512 {
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (destruct)
519 {
520 dounwind(-1);
521 SvREFCNT_dec(PL_curstackinfo->si_stack);
522 }
523
524 Safefree(PL_curstackinfo->si_cxstack);
525 Safefree(PL_curstackinfo);
526 PL_curstackinfo = p;
527 }
528
529 Safefree(PL_tmps_stack);
530 Safefree(PL_markstack);
531 Safefree(PL_scopestack);
532 Safefree(PL_savestack);
533 Safefree(PL_retstack);
534}
535
536static void
537allocate_stack (Coro__State ctx, int alloc)
538{
539 coro_stack *stack;
540
541 New (0, stack, 1, coro_stack);
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546 if (alloc)
547 {
548#ifdef HAVE_MMAP
549 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
551 if (stack->sptr == (void *)-1)
552#endif
553 {
554 /*FIXME*//*D*//* reasonable stack size! */
555 stack->ssize = -4096 * sizeof (long);
556 New (0, stack->sptr, 4096, long);
557 }
558 }
559 else
560 stack->sptr = 0;
561
562 ctx->stack = stack;
563}
564
565static void
566deallocate_stack (Coro__State ctx)
567{
568 coro_stack *stack = ctx->stack;
569
570 ctx->stack = 0;
571
572 if (stack)
573 {
574 if (!--stack->refcnt)
575 {
576#ifdef HAVE_MMAP
577 if (stack->ssize > 0 && stack->sptr)
578 munmap (stack->sptr, stack->ssize);
579 else
580#else
581 Safefree (stack->sptr);
582#endif
583 Safefree (stack);
584 }
585 else if (ctx->gencnt == stack->gencnt)
586 --stack->usecnt;
587 }
588}
589
590static void
591setup_coro (void *arg)
592{
593 /*
594 * emulate part of the perl startup here.
595 */
596 dSP;
597 Coro__State ctx = (Coro__State)arg;
598 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599
600 coro_init_stacks (aTHX);
601 /*PL_curcop = 0;*/
602 /*PL_in_eval = PL_in_eval;*/ /* inherit */
603 SvREFCNT_dec (GvAV (PL_defgv));
604 GvAV (PL_defgv) = ctx->args;
605
606 SPAGAIN;
607
608 if (ctx->stack)
609 {
610 ctx->cursp = 0;
611
612 PUSHMARK(SP);
613 PUTBACK;
614 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615
616 if (SvTRUE (ERRSV))
617 croak (NULL);
618 else
619 croak ("FATAL: CCTXT coroutine returned!");
620 }
621 else
622 {
623 UNOP myop;
624
625 PL_op = (OP *)&myop;
626
627 Zero(&myop, 1, UNOP);
628 myop.op_next = Nullop;
629 myop.op_flags = OPf_WANT_VOID;
630
631 PUSHMARK(SP);
632 XPUSHs (sub_init);
633 /*
634 * the next line is slightly wrong, as PL_op->op_next
635 * is actually being executed so we skip the first op.
636 * that doesn't matter, though, since it is only
637 * pp_nextstate and we never return...
638 * ah yes, and I don't care anyways ;)
639 */
640 PUTBACK;
641 PL_op = pp_entersub();
642 SPAGAIN;
643
644 ENTER; /* necessary e.g. for dounwind */
645 }
646}
647
648static void
649continue_coro (void *arg)
650{
651 /*
652 * this is a _very_ stripped down perl interpreter ;)
653 */
654 Coro__State ctx = (Coro__State)arg;
655 JMPENV coro_start_env;
656
657 /* same as JMPENV_BOOTSTRAP */
658 Zero(&coro_start_env, 1, JMPENV);
659 coro_start_env.je_ret = -1;
660 coro_start_env.je_mustcatch = TRUE;
661 PL_top_env = &coro_start_env;
662
663 ctx->cursp = 0;
664 PL_op = PL_op->op_next;
665 CALLRUNOPS(aTHX);
666
667 abort ();
668}
669
670STATIC void
671transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
672{
673 dSTACKLEVEL;
674 static struct coro *xnext;
675
676 if (prev != next)
677 {
678 xnext = next;
679
680 if (next->mainstack)
681 {
682 SAVE (prev, flags);
683 LOAD (next);
684
685 /* mark this state as in-use */
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 {
692 if (!prev->stack)
693 allocate_stack (prev, 0);
694 else if (prev->cursp != stacklevel
695 && prev->stack->usecnt > 1)
696 {
697 prev->gencnt = ++prev->stack->gencnt;
698 prev->stack->usecnt = 1;
699 }
700
701 /* has our stack been invalidated? */
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 {
704 deallocate_stack (next);
705 allocate_stack (next, 1);
706 coro_create (&(next->stack->cctx),
707 continue_coro, (void *)next,
708 next->stack->sptr, labs (next->stack->ssize));
709 }
710
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712 /* don't add any code here */
713 }
714
715 }
716 else if (next->tmps_ix == -2)
717 croak ("tried to transfer to running coroutine");
718 else
719 {
720 SAVE (prev, -1); /* first get rid of the old state */
721
722 if (flags & TRANSFER_SAVE_CCTXT)
723 {
724 if (!prev->stack)
725 allocate_stack (prev, 0);
726
727 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728 {
729 setup_coro (next);
730
731 prev->stack->refcnt++;
732 prev->stack->usecnt++;
733 next->stack = prev->stack;
734 next->gencnt = prev->gencnt;
735 }
736 else
737 {
738 allocate_stack (next, 1);
739 coro_create (&(next->stack->cctx),
740 setup_coro, (void *)next,
741 next->stack->sptr, labs (next->stack->ssize));
742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743 /* don't add any code here */
744 }
745 }
746 else
747 setup_coro (next);
748 }
749 }
750
751 /*
752 * xnext is now either prev or next, depending on wether
753 * we switched the c stack or not. that's why i use a global
754 * variable, that should become thread-specific at one point.
755 */
756 xnext->cursp = stacklevel;
757}
758
759static struct coro *
760sv_to_coro (SV *arg, const char *funcname, const char *varname)
761{
762 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
763 {
764 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
765
766 if (!he)
767 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
768
769 arg = HeVAL(he);
770 }
771
772 /* must also be changed inside Coro::Cont::yield */
773 if (SvROK(arg) && SvOBJECT(SvRV(arg))
774 && SvSTASH(SvRV(arg)) == coro_state_stash)
775 return (struct coro *) SvIV((SV*)SvRV(arg));
776
777 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
778 /*NORETURN*/
779}
780
781static void
782api_transfer(pTHX_ SV *prev, SV *next, int flags)
783{
784 transfer(aTHX_
785 sv_to_coro (prev, "Coro::transfer", "prev"),
786 sv_to_coro (next, "Coro::transfer", "next"),
787 flags);
788}
789 279
790/** Coro ********************************************************************/ 280/** Coro ********************************************************************/
791 281
792#define PRIO_MAX 3 282#define PRIO_MAX 3
793#define PRIO_HIGH 1 283#define PRIO_HIGH 1
… …
795#define PRIO_LOW -1 285#define PRIO_LOW -1
796#define PRIO_IDLE -3 286#define PRIO_IDLE -3
797#define PRIO_MIN -4 287#define PRIO_MIN -4
798 288
799/* for Coro.pm */ 289/* for Coro.pm */
800static GV *coro_current, *coro_idle; 290static SV *coro_current;
291static SV *coro_readyhook;
801static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
802static int coro_nready; 293static struct coro *coro_first;
294#define coro_nready coroapi.nready
803 295
804static void 296/** lowlevel stuff **********************************************************/
805coro_enq (SV *sv) 297
298static SV *
299coro_get_sv (pTHX_ const char *name, int create)
806{ 300{
807 if (SvROK (sv)) 301#if PERL_VERSION_ATLEAST (5,10,0)
302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
303 get_sv (name, create);
304#endif
305 return get_sv (name, create);
306}
307
308static AV *
309coro_get_av (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_av (name, create);
314#endif
315 return get_av (name, create);
316}
317
318static HV *
319coro_get_hv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_hv (name, create);
324#endif
325 return get_hv (name, create);
326}
327
328static AV *
329coro_clone_padlist (pTHX_ CV *cv)
330{
331 AV *padlist = CvPADLIST (cv);
332 AV *newpadlist, *newpad;
333
334 newpadlist = newAV ();
335 AvREAL_off (newpadlist);
336#if PERL_VERSION_ATLEAST (5,10,0)
337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
338#else
339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
340#endif
341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
342 --AvFILLp (padlist);
343
344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
345 av_store (newpadlist, 1, (SV *)newpad);
346
347 return newpadlist;
348}
349
350static void
351free_padlist (pTHX_ AV *padlist)
352{
353 /* may be during global destruction */
354 if (SvREFCNT (padlist))
808 { 355 {
809 SV *hv = SvRV (sv); 356 I32 i = AvFILLp (padlist);
810 if (SvTYPE (hv) == SVt_PVHV) 357 while (i >= 0)
811 { 358 {
812 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 359 SV **svp = av_fetch (padlist, i--, FALSE);
813 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 360 if (svp)
361 {
362 SV *sv;
363 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
364 SvREFCNT_dec (sv);
814 365
815 prio = prio > PRIO_MAX ? PRIO_MAX 366 SvREFCNT_dec (*svp);
816 : prio < PRIO_MIN ? PRIO_MIN 367 }
817 : prio;
818
819 av_push (coro_ready [prio - PRIO_MIN], sv);
820 coro_nready++;
821
822 return;
823 } 368 }
369
370 SvREFCNT_dec ((SV*)padlist);
371 }
372}
373
374static int
375coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
376{
377 AV *padlist;
378 AV *av = (AV *)mg->mg_obj;
379
380 /* casting is fun. */
381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
382 free_padlist (aTHX_ padlist);
383
384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
385
386 return 0;
387}
388
389#define CORO_MAGIC_type_cv PERL_MAGIC_ext
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
391
392static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0,
394 coro_cv_free
395};
396
397#define CORO_MAGIC(sv, type) \
398 expect_true (SvMAGIC (sv)) \
399 ? expect_true (SvMAGIC (sv)->mg_type == type) \
400 ? SvMAGIC (sv) \
401 : mg_find (sv, type) \
402 : 0
403
404#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
405#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
406
407INLINE struct coro *
408SvSTATE_ (pTHX_ SV *coro)
409{
410 HV *stash;
411 MAGIC *mg;
412
413 if (SvROK (coro))
414 coro = SvRV (coro);
415
416 if (expect_false (SvTYPE (coro) != SVt_PVHV))
417 croak ("Coro::State object required");
418
419 stash = SvSTASH (coro);
420 if (expect_false (stash != coro_stash && stash != coro_state_stash))
421 {
422 /* very slow, but rare, check */
423 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
424 croak ("Coro::State object required");
425 }
426
427 mg = CORO_MAGIC_state (coro);
428 return (struct coro *)mg->mg_ptr;
429}
430
431#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
432
433/* fastert than SvSTATE, but expects a coroutine hv */
434INLINE struct coro *
435SvSTATE_hv (SV *sv)
436{
437 MAGIC *mg = expect_true (SvMAGIC (sv)->mg_type == CORO_MAGIC_type_state)
438 ? SvMAGIC (sv)
439 : mg_find (sv, CORO_MAGIC_type_state);
440
441 return (struct coro *)mg->mg_ptr;
442}
443
444#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
445
446/* the next two functions merely cache the padlists */
447static void
448get_padlist (pTHX_ CV *cv)
449{
450 MAGIC *mg = CORO_MAGIC_cv (cv);
451 AV *av;
452
453 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
454 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
455 else
456 {
457#if CORO_PREFER_PERL_FUNCTIONS
458 /* this is probably cleaner? but also slower! */
459 /* in practise, it seems to be less stable */
460 CV *cp = Perl_cv_clone (cv);
461 CvPADLIST (cv) = CvPADLIST (cp);
462 CvPADLIST (cp) = 0;
463 SvREFCNT_dec (cp);
464#else
465 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
466#endif
824 } 467 }
468}
825 469
826 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 470static void
471put_padlist (pTHX_ CV *cv)
472{
473 MAGIC *mg = CORO_MAGIC_cv (cv);
474 AV *av;
475
476 if (expect_false (!mg))
477 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
478
479 av = (AV *)mg->mg_obj;
480
481 if (expect_false (AvFILLp (av) >= AvMAX (av)))
482 av_extend (av, AvMAX (av) + 1);
483
484 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
485}
486
487/** load & save, init *******************************************************/
488
489static void
490load_perl (pTHX_ Coro__State c)
491{
492 perl_slots *slot = c->slot;
493 c->slot = 0;
494
495 PL_mainstack = c->mainstack;
496
497 GvSV (PL_defgv) = slot->defsv;
498 GvAV (PL_defgv) = slot->defav;
499 GvSV (PL_errgv) = slot->errsv;
500 GvSV (irsgv) = slot->irsgv;
501
502 #define VAR(name,type) PL_ ## name = slot->name;
503 # include "state.h"
504 #undef VAR
505
506 {
507 dSP;
508
509 CV *cv;
510
511 /* now do the ugly restore mess */
512 while (expect_true (cv = (CV *)POPs))
513 {
514 put_padlist (aTHX_ cv); /* mark this padlist as available */
515 CvDEPTH (cv) = PTR2IV (POPs);
516 CvPADLIST (cv) = (AV *)POPs;
517 }
518
519 PUTBACK;
520 }
521
522 slf_frame = c->slf_frame;
523 coro_throw = c->throw;
524}
525
526static void
527save_perl (pTHX_ Coro__State c)
528{
529 c->throw = coro_throw;
530 c->slf_frame = slf_frame;
531
532 {
533 dSP;
534 I32 cxix = cxstack_ix;
535 PERL_CONTEXT *ccstk = cxstack;
536 PERL_SI *top_si = PL_curstackinfo;
537
538 /*
539 * the worst thing you can imagine happens first - we have to save
540 * (and reinitialize) all cv's in the whole callchain :(
541 */
542
543 XPUSHs (Nullsv);
544 /* this loop was inspired by pp_caller */
545 for (;;)
546 {
547 while (expect_true (cxix >= 0))
548 {
549 PERL_CONTEXT *cx = &ccstk[cxix--];
550
551 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
552 {
553 CV *cv = cx->blk_sub.cv;
554
555 if (expect_true (CvDEPTH (cv)))
556 {
557 EXTEND (SP, 3);
558 PUSHs ((SV *)CvPADLIST (cv));
559 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
560 PUSHs ((SV *)cv);
561
562 CvDEPTH (cv) = 0;
563 get_padlist (aTHX_ cv);
564 }
565 }
566 }
567
568 if (expect_true (top_si->si_type == PERLSI_MAIN))
569 break;
570
571 top_si = top_si->si_prev;
572 ccstk = top_si->si_cxstack;
573 cxix = top_si->si_cxix;
574 }
575
576 PUTBACK;
577 }
578
579 /* allocate some space on the context stack for our purposes */
580 /* we manually unroll here, as usually 2 slots is enough */
581 if (SLOT_COUNT >= 1) CXINC;
582 if (SLOT_COUNT >= 2) CXINC;
583 if (SLOT_COUNT >= 3) CXINC;
584 {
585 int i;
586 for (i = 3; i < SLOT_COUNT; ++i)
587 CXINC;
588 }
589 cxstack_ix -= SLOT_COUNT; /* undo allocation */
590
591 c->mainstack = PL_mainstack;
592
593 {
594 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
595
596 slot->defav = GvAV (PL_defgv);
597 slot->defsv = DEFSV;
598 slot->errsv = ERRSV;
599 slot->irsgv = GvSV (irsgv);
600
601 #define VAR(name,type) slot->name = PL_ ## name;
602 # include "state.h"
603 #undef VAR
604 }
605}
606
607/*
608 * allocate various perl stacks. This is almost an exact copy
609 * of perl.c:init_stacks, except that it uses less memory
610 * on the (sometimes correct) assumption that coroutines do
611 * not usually need a lot of stackspace.
612 */
613#if CORO_PREFER_PERL_FUNCTIONS
614# define coro_init_stacks init_stacks
615#else
616static void
617coro_init_stacks (pTHX)
618{
619 PL_curstackinfo = new_stackinfo(32, 8);
620 PL_curstackinfo->si_type = PERLSI_MAIN;
621 PL_curstack = PL_curstackinfo->si_stack;
622 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
623
624 PL_stack_base = AvARRAY(PL_curstack);
625 PL_stack_sp = PL_stack_base;
626 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
627
628 New(50,PL_tmps_stack,32,SV*);
629 PL_tmps_floor = -1;
630 PL_tmps_ix = -1;
631 PL_tmps_max = 32;
632
633 New(54,PL_markstack,16,I32);
634 PL_markstack_ptr = PL_markstack;
635 PL_markstack_max = PL_markstack + 16;
636
637#ifdef SET_MARK_OFFSET
638 SET_MARK_OFFSET;
639#endif
640
641 New(54,PL_scopestack,8,I32);
642 PL_scopestack_ix = 0;
643 PL_scopestack_max = 8;
644
645 New(54,PL_savestack,24,ANY);
646 PL_savestack_ix = 0;
647 PL_savestack_max = 24;
648
649#if !PERL_VERSION_ATLEAST (5,10,0)
650 New(54,PL_retstack,4,OP*);
651 PL_retstack_ix = 0;
652 PL_retstack_max = 4;
653#endif
654}
655#endif
656
657/*
658 * destroy the stacks, the callchain etc...
659 */
660static void
661coro_destruct_stacks (pTHX)
662{
663 while (PL_curstackinfo->si_next)
664 PL_curstackinfo = PL_curstackinfo->si_next;
665
666 while (PL_curstackinfo)
667 {
668 PERL_SI *p = PL_curstackinfo->si_prev;
669
670 if (!IN_DESTRUCT)
671 SvREFCNT_dec (PL_curstackinfo->si_stack);
672
673 Safefree (PL_curstackinfo->si_cxstack);
674 Safefree (PL_curstackinfo);
675 PL_curstackinfo = p;
676 }
677
678 Safefree (PL_tmps_stack);
679 Safefree (PL_markstack);
680 Safefree (PL_scopestack);
681 Safefree (PL_savestack);
682#if !PERL_VERSION_ATLEAST (5,10,0)
683 Safefree (PL_retstack);
684#endif
685}
686
687static size_t
688coro_rss (pTHX_ struct coro *coro)
689{
690 size_t rss = sizeof (*coro);
691
692 if (coro->mainstack)
693 {
694 perl_slots tmp_slot;
695 perl_slots *slot;
696
697 if (coro->flags & CF_RUNNING)
698 {
699 slot = &tmp_slot;
700
701 #define VAR(name,type) slot->name = PL_ ## name;
702 # include "state.h"
703 #undef VAR
704 }
705 else
706 slot = coro->slot;
707
708 if (slot)
709 {
710 rss += sizeof (slot->curstackinfo);
711 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
712 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
713 rss += slot->tmps_max * sizeof (SV *);
714 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
715 rss += slot->scopestack_max * sizeof (I32);
716 rss += slot->savestack_max * sizeof (ANY);
717
718#if !PERL_VERSION_ATLEAST (5,10,0)
719 rss += slot->retstack_max * sizeof (OP *);
720#endif
721 }
722 }
723
724 return rss;
725}
726
727/** coroutine stack handling ************************************************/
728
729static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
730static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
731static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
732
733/* apparently < 5.8.8 */
734#ifndef MgPV_nolen_const
735#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
736 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
737 (const char*)(mg)->mg_ptr)
738#endif
739
740/*
741 * This overrides the default magic get method of %SIG elements.
742 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
743 * and instead of tryign to save and restore the hash elements, we just provide
744 * readback here.
745 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
746 * not expecting this to actually change the hook. This is a potential problem
747 * when a schedule happens then, but we ignore this.
748 */
749static int
750coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
751{
752 const char *s = MgPV_nolen_const (mg);
753
754 if (*s == '_')
755 {
756 SV **svp = 0;
757
758 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
759 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
760
761 if (svp)
762 {
763 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
764 return 0;
765 }
766 }
767
768 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
769}
770
771static int
772coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
773{
774 const char *s = MgPV_nolen_const (mg);
775
776 if (*s == '_')
777 {
778 SV **svp = 0;
779
780 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
781 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
782
783 if (svp)
784 {
785 SV *old = *svp;
786 *svp = 0;
787 SvREFCNT_dec (old);
788 return 0;
789 }
790 }
791
792 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
793}
794
795static int
796coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
797{
798 const char *s = MgPV_nolen_const (mg);
799
800 if (*s == '_')
801 {
802 SV **svp = 0;
803
804 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
805 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
806
807 if (svp)
808 {
809 SV *old = *svp;
810 *svp = newSVsv (sv);
811 SvREFCNT_dec (old);
812 return 0;
813 }
814 }
815
816 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
817}
818
819static void
820prepare_nop (pTHX_ struct coro_transfer_args *ta)
821{
822 /* kind of mega-hacky, but works */
823 ta->next = ta->prev = (struct coro *)ta;
824}
825
826static int
827slf_check_nop (pTHX_ struct CoroSLF *frame)
828{
829 return 0;
830}
831
832static void NOINLINE /* noinline to keep it out of the transfer fast path */
833coro_setup (pTHX_ struct coro *coro)
834{
835 /*
836 * emulate part of the perl startup here.
837 */
838 coro_init_stacks (aTHX);
839
840 PL_runops = RUNOPS_DEFAULT;
841 PL_curcop = &PL_compiling;
842 PL_in_eval = EVAL_NULL;
843 PL_comppad = 0;
844 PL_curpm = 0;
845 PL_curpad = 0;
846 PL_localizing = 0;
847 PL_dirty = 0;
848 PL_restartop = 0;
849#if PERL_VERSION_ATLEAST (5,10,0)
850 PL_parser = 0;
851#endif
852
853 /* recreate the die/warn hooks */
854 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
855 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
856
857 GvSV (PL_defgv) = newSV (0);
858 GvAV (PL_defgv) = coro->args; coro->args = 0;
859 GvSV (PL_errgv) = newSV (0);
860 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
861 PL_rs = newSVsv (GvSV (irsgv));
862 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
863
864 {
865 dSP;
866 UNOP myop;
867
868 Zero (&myop, 1, UNOP);
869 myop.op_next = Nullop;
870 myop.op_flags = OPf_WANT_VOID;
871
872 PUSHMARK (SP);
873 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
874 PUTBACK;
875 PL_op = (OP *)&myop;
876 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
877 SPAGAIN;
878 }
879
880 /* this newly created coroutine might be run on an existing cctx which most
881 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
882 */
883 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
884 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
885
886 coro_throw = coro->throw;
887}
888
889static void
890coro_destruct (pTHX_ struct coro *coro)
891{
892 if (!IN_DESTRUCT)
893 {
894 /* restore all saved variables and stuff */
895 LEAVE_SCOPE (0);
896 assert (PL_tmps_floor == -1);
897
898 /* free all temporaries */
899 FREETMPS;
900 assert (PL_tmps_ix == -1);
901
902 /* unwind all extra stacks */
903 POPSTACK_TO (PL_mainstack);
904
905 /* unwind main stack */
906 dounwind (-1);
907 }
908
909 SvREFCNT_dec (GvSV (PL_defgv));
910 SvREFCNT_dec (GvAV (PL_defgv));
911 SvREFCNT_dec (GvSV (PL_errgv));
912 SvREFCNT_dec (PL_defoutgv);
913 SvREFCNT_dec (PL_rs);
914 SvREFCNT_dec (GvSV (irsgv));
915
916 SvREFCNT_dec (PL_diehook);
917 SvREFCNT_dec (PL_warnhook);
918
919 SvREFCNT_dec (coro->saved_deffh);
920 SvREFCNT_dec (coro_throw);
921
922 coro_destruct_stacks (aTHX);
923}
924
925INLINE void
926free_coro_mortal (pTHX)
927{
928 if (expect_true (coro_mortal))
929 {
930 SvREFCNT_dec (coro_mortal);
931 coro_mortal = 0;
932 }
933}
934
935static int
936runops_trace (pTHX)
937{
938 COP *oldcop = 0;
939 int oldcxix = -2;
940 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
941 coro_cctx *cctx = coro->cctx;
942
943 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
944 {
945 PERL_ASYNC_CHECK ();
946
947 if (cctx->flags & CC_TRACE_ALL)
948 {
949 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
950 {
951 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
952 SV **bot, **top;
953 AV *av = newAV (); /* return values */
954 SV **cb;
955 dSP;
956
957 GV *gv = CvGV (cx->blk_sub.cv);
958 SV *fullname = sv_2mortal (newSV (0));
959 if (isGV (gv))
960 gv_efullname3 (fullname, gv, 0);
961
962 bot = PL_stack_base + cx->blk_oldsp + 1;
963 top = cx->blk_gimme == G_ARRAY ? SP + 1
964 : cx->blk_gimme == G_SCALAR ? bot + 1
965 : bot;
966
967 av_extend (av, top - bot);
968 while (bot < top)
969 av_push (av, SvREFCNT_inc_NN (*bot++));
970
971 PL_runops = RUNOPS_DEFAULT;
972 ENTER;
973 SAVETMPS;
974 EXTEND (SP, 3);
975 PUSHMARK (SP);
976 PUSHs (&PL_sv_no);
977 PUSHs (fullname);
978 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
979 PUTBACK;
980 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
981 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
982 SPAGAIN;
983 FREETMPS;
984 LEAVE;
985 PL_runops = runops_trace;
986 }
987
988 if (oldcop != PL_curcop)
989 {
990 oldcop = PL_curcop;
991
992 if (PL_curcop != &PL_compiling)
993 {
994 SV **cb;
995
996 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
997 {
998 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
999
1000 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1001 {
1002 runops_proc_t old_runops = PL_runops;
1003 dSP;
1004 GV *gv = CvGV (cx->blk_sub.cv);
1005 SV *fullname = sv_2mortal (newSV (0));
1006
1007 if (isGV (gv))
1008 gv_efullname3 (fullname, gv, 0);
1009
1010 PL_runops = RUNOPS_DEFAULT;
1011 ENTER;
1012 SAVETMPS;
1013 EXTEND (SP, 3);
1014 PUSHMARK (SP);
1015 PUSHs (&PL_sv_yes);
1016 PUSHs (fullname);
1017 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1018 PUTBACK;
1019 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1020 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1021 SPAGAIN;
1022 FREETMPS;
1023 LEAVE;
1024 PL_runops = runops_trace;
1025 }
1026
1027 oldcxix = cxstack_ix;
1028 }
1029
1030 if (cctx->flags & CC_TRACE_LINE)
1031 {
1032 dSP;
1033
1034 PL_runops = RUNOPS_DEFAULT;
1035 ENTER;
1036 SAVETMPS;
1037 EXTEND (SP, 3);
1038 PL_runops = RUNOPS_DEFAULT;
1039 PUSHMARK (SP);
1040 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1041 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1042 PUTBACK;
1043 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1044 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1045 SPAGAIN;
1046 FREETMPS;
1047 LEAVE;
1048 PL_runops = runops_trace;
1049 }
1050 }
1051 }
1052 }
1053 }
1054
1055 TAINT_NOT;
1056 return 0;
1057}
1058
1059static void
1060prepare_set_stacklevel (struct coro_transfer_args *ta, struct coro_cctx *cctx)
1061{
1062 ta->prev = (struct coro *)cctx;
1063 ta->next = 0;
1064}
1065
1066/* inject a fake call to Coro::State::_cctx_init into the execution */
1067/* _cctx_init should be careful, as it could be called at almost any time */
1068/* during execution of a perl program */
1069/* also initialises PL_top_env */
1070static void NOINLINE
1071cctx_prepare (pTHX_ coro_cctx *cctx)
1072{
1073 dSP;
1074 UNOP myop;
1075
1076 PL_top_env = &PL_start_env;
1077
1078 if (cctx->flags & CC_TRACE)
1079 PL_runops = runops_trace;
1080
1081 Zero (&myop, 1, UNOP);
1082 myop.op_next = PL_op;
1083 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1084
1085 PUSHMARK (SP);
1086 EXTEND (SP, 2);
1087 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1088 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1089 PUTBACK;
1090 PL_op = (OP *)&myop;
1091 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1092 SPAGAIN;
1093}
1094
1095/* the tail of transfer: execute stuff we can only do after a transfer */
1096INLINE void
1097transfer_tail (pTHX)
1098{
1099 free_coro_mortal (aTHX);
1100}
1101
1102/*
1103 * this is a _very_ stripped down perl interpreter ;)
1104 */
1105static void
1106cctx_run (void *arg)
1107{
1108#ifdef USE_ITHREADS
1109# if CORO_PTHREAD
1110 PERL_SET_CONTEXT (coro_thx);
1111# endif
1112#endif
1113 {
1114 dTHX;
1115
1116 /* normally we would need to skip the entersub here */
1117 /* not doing so will re-execute it, which is exactly what we want */
1118 /* PL_nop = PL_nop->op_next */
1119
1120 /* inject a fake subroutine call to cctx_init */
1121 cctx_prepare (aTHX_ (coro_cctx *)arg);
1122
1123 /* cctx_run is the alternative tail of transfer() */
1124 transfer_tail (aTHX);
1125
1126 /* somebody or something will hit me for both perl_run and PL_restartop */
1127 PL_restartop = PL_op;
1128 perl_run (PL_curinterp);
1129
1130 /*
1131 * If perl-run returns we assume exit() was being called or the coro
1132 * fell off the end, which seems to be the only valid (non-bug)
1133 * reason for perl_run to return. We try to exit by jumping to the
1134 * bootstrap-time "top" top_env, as we cannot restore the "main"
1135 * coroutine as Coro has no such concept
1136 */
1137 PL_top_env = main_top_env;
1138 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1139 }
1140}
1141
1142static coro_cctx *
1143cctx_new ()
1144{
1145 coro_cctx *cctx;
1146
1147 ++cctx_count;
1148 New (0, cctx, 1, coro_cctx);
1149
1150 cctx->gen = cctx_gen;
1151 cctx->flags = 0;
1152 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1153
1154 return cctx;
1155}
1156
1157/* create a new cctx only suitable as source */
1158static coro_cctx *
1159cctx_new_empty ()
1160{
1161 coro_cctx *cctx = cctx_new ();
1162
1163 cctx->sptr = 0;
1164 coro_create (&cctx->cctx, 0, 0, 0, 0);
1165
1166 return cctx;
1167}
1168
1169/* create a new cctx suitable as destination/running a perl interpreter */
1170static coro_cctx *
1171cctx_new_run ()
1172{
1173 coro_cctx *cctx = cctx_new ();
1174 void *stack_start;
1175 size_t stack_size;
1176
1177#if HAVE_MMAP
1178 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1179 /* mmap supposedly does allocate-on-write for us */
1180 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1181
1182 if (cctx->sptr != (void *)-1)
1183 {
1184 #if CORO_STACKGUARD
1185 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1186 #endif
1187 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1188 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1189 cctx->flags |= CC_MAPPED;
1190 }
1191 else
1192#endif
1193 {
1194 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1195 New (0, cctx->sptr, cctx_stacksize, long);
1196
1197 if (!cctx->sptr)
1198 {
1199 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1200 _exit (EXIT_FAILURE);
1201 }
1202
1203 stack_start = cctx->sptr;
1204 stack_size = cctx->ssize;
1205 }
1206
1207 #if CORO_USE_VALGRIND
1208 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1209 #endif
1210
1211 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1212
1213 return cctx;
1214}
1215
1216static void
1217cctx_destroy (coro_cctx *cctx)
1218{
1219 if (!cctx)
1220 return;
1221
1222 --cctx_count;
1223 coro_destroy (&cctx->cctx);
1224
1225 /* coro_transfer creates new, empty cctx's */
1226 if (cctx->sptr)
1227 {
1228 #if CORO_USE_VALGRIND
1229 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1230 #endif
1231
1232#if HAVE_MMAP
1233 if (cctx->flags & CC_MAPPED)
1234 munmap (cctx->sptr, cctx->ssize);
1235 else
1236#endif
1237 Safefree (cctx->sptr);
1238 }
1239
1240 Safefree (cctx);
1241}
1242
1243/* wether this cctx should be destructed */
1244#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1245
1246static coro_cctx *
1247cctx_get (pTHX)
1248{
1249 while (expect_true (cctx_first))
1250 {
1251 coro_cctx *cctx = cctx_first;
1252 cctx_first = cctx->next;
1253 --cctx_idle;
1254
1255 if (expect_true (!CCTX_EXPIRED (cctx)))
1256 return cctx;
1257
1258 cctx_destroy (cctx);
1259 }
1260
1261 return cctx_new_run ();
1262}
1263
1264static void
1265cctx_put (coro_cctx *cctx)
1266{
1267 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1268
1269 /* free another cctx if overlimit */
1270 if (expect_false (cctx_idle >= cctx_max_idle))
1271 {
1272 coro_cctx *first = cctx_first;
1273 cctx_first = first->next;
1274 --cctx_idle;
1275
1276 cctx_destroy (first);
1277 }
1278
1279 ++cctx_idle;
1280 cctx->next = cctx_first;
1281 cctx_first = cctx;
1282}
1283
1284/** coroutine switching *****************************************************/
1285
1286static void
1287transfer_check (pTHX_ struct coro *prev, struct coro *next)
1288{
1289 /* TODO: throwing up here is considered harmful */
1290
1291 if (expect_true (prev != next))
1292 {
1293 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1294 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1295
1296 if (expect_false (next->flags & CF_RUNNING))
1297 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1298
1299 if (expect_false (next->flags & CF_DESTROYED))
1300 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1301
1302#if !PERL_VERSION_ATLEAST (5,10,0)
1303 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1304 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1305#endif
1306 }
1307}
1308
1309/* always use the TRANSFER macro */
1310static void NOINLINE /* noinline so we have a fixed stackframe */
1311transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1312{
1313 dSTACKLEVEL;
1314
1315 /* sometimes transfer is only called to set idle_sp */
1316 if (expect_false (!next))
1317 {
1318 ((coro_cctx *)prev)->idle_sp = (void *)stacklevel;
1319 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1320 }
1321 else if (expect_true (prev != next))
1322 {
1323 coro_cctx *prev__cctx;
1324
1325 if (expect_false (prev->flags & CF_NEW))
1326 {
1327 /* create a new empty/source context */
1328 prev->cctx = cctx_new_empty ();
1329 prev->flags &= ~CF_NEW;
1330 prev->flags |= CF_RUNNING;
1331 }
1332
1333 prev->flags &= ~CF_RUNNING;
1334 next->flags |= CF_RUNNING;
1335
1336 /* first get rid of the old state */
1337 save_perl (aTHX_ prev);
1338
1339 if (expect_false (next->flags & CF_NEW))
1340 {
1341 /* need to start coroutine */
1342 next->flags &= ~CF_NEW;
1343 /* setup coroutine call */
1344 coro_setup (aTHX_ next);
1345 }
1346 else
1347 load_perl (aTHX_ next);
1348
1349 prev__cctx = prev->cctx;
1350
1351 /* possibly untie and reuse the cctx */
1352 if (expect_true (
1353 prev__cctx->idle_sp == (void *)stacklevel
1354 && !(prev__cctx->flags & CC_TRACE)
1355 && !force_cctx
1356 ))
1357 {
1358 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1359 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1360
1361 prev->cctx = 0;
1362
1363 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1364 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1365 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1366 if (!next->cctx)
1367 next->cctx = cctx_get (aTHX);
1368
1369 cctx_put (prev__cctx);
1370 }
1371
1372 ++next->usecount;
1373
1374 if (expect_true (!next->cctx))
1375 next->cctx = cctx_get (aTHX);
1376
1377 if (expect_false (prev__cctx != next->cctx))
1378 {
1379 prev__cctx->top_env = PL_top_env;
1380 PL_top_env = next->cctx->top_env;
1381 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1382 }
1383
1384 transfer_tail (aTHX);
1385 }
1386}
1387
1388#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1389#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1390
1391/** high level stuff ********************************************************/
1392
1393static int
1394coro_state_destroy (pTHX_ struct coro *coro)
1395{
1396 if (coro->flags & CF_DESTROYED)
1397 return 0;
1398
1399 if (coro->on_destroy)
1400 coro->on_destroy (aTHX_ coro);
1401
1402 coro->flags |= CF_DESTROYED;
1403
1404 if (coro->flags & CF_READY)
1405 {
1406 /* reduce nready, as destroying a ready coro effectively unreadies it */
1407 /* alternative: look through all ready queues and remove the coro */
1408 --coro_nready;
1409 }
1410 else
1411 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1412
1413 if (coro->mainstack && coro->mainstack != main_mainstack)
1414 {
1415 struct coro temp;
1416
1417 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1418
1419 save_perl (aTHX_ &temp);
1420 load_perl (aTHX_ coro);
1421
1422 coro_destruct (aTHX_ coro);
1423
1424 load_perl (aTHX_ &temp);
1425
1426 coro->slot = 0;
1427 }
1428
1429 cctx_destroy (coro->cctx);
1430 SvREFCNT_dec (coro->args);
1431
1432 if (coro->next) coro->next->prev = coro->prev;
1433 if (coro->prev) coro->prev->next = coro->next;
1434 if (coro == coro_first) coro_first = coro->next;
1435
1436 return 1;
1437}
1438
1439static int
1440coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1441{
1442 struct coro *coro = (struct coro *)mg->mg_ptr;
1443 mg->mg_ptr = 0;
1444
1445 coro->hv = 0;
1446
1447 if (--coro->refcnt < 0)
1448 {
1449 coro_state_destroy (aTHX_ coro);
1450 Safefree (coro);
1451 }
1452
1453 return 0;
1454}
1455
1456static int
1457coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1458{
1459 struct coro *coro = (struct coro *)mg->mg_ptr;
1460
1461 ++coro->refcnt;
1462
1463 return 0;
1464}
1465
1466static MGVTBL coro_state_vtbl = {
1467 0, 0, 0, 0,
1468 coro_state_free,
1469 0,
1470#ifdef MGf_DUP
1471 coro_state_dup,
1472#else
1473# define MGf_DUP 0
1474#endif
1475};
1476
1477static void
1478prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1479{
1480 ta->prev = SvSTATE (prev_sv);
1481 ta->next = SvSTATE (next_sv);
1482 TRANSFER_CHECK (*ta);
1483}
1484
1485static void
1486api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1487{
1488 struct coro_transfer_args ta;
1489
1490 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1491 TRANSFER (ta, 1);
1492}
1493
1494/** Coro ********************************************************************/
1495
1496INLINE void
1497coro_enq (pTHX_ struct coro *coro)
1498{
1499 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1500}
1501
1502INLINE SV *
1503coro_deq (pTHX)
1504{
1505 int prio;
1506
1507 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1508 if (AvFILLp (coro_ready [prio]) >= 0)
1509 return av_shift (coro_ready [prio]);
1510
1511 return 0;
1512}
1513
1514static int
1515api_ready (pTHX_ SV *coro_sv)
1516{
1517 struct coro *coro;
1518 SV *sv_hook;
1519 void (*xs_hook)(void);
1520
1521 if (SvROK (coro_sv))
1522 coro_sv = SvRV (coro_sv);
1523
1524 coro = SvSTATE (coro_sv);
1525
1526 if (coro->flags & CF_READY)
1527 return 0;
1528
1529 coro->flags |= CF_READY;
1530
1531 sv_hook = coro_nready ? 0 : coro_readyhook;
1532 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1533
1534 coro_enq (aTHX_ coro);
1535 ++coro_nready;
1536
1537 if (sv_hook)
1538 {
1539 dSP;
1540
1541 ENTER;
1542 SAVETMPS;
1543
1544 PUSHMARK (SP);
1545 PUTBACK;
1546 call_sv (sv_hook, G_DISCARD);
1547 SPAGAIN;
1548
1549 FREETMPS;
1550 LEAVE;
1551 }
1552
1553 if (xs_hook)
1554 xs_hook ();
1555
1556 return 1;
1557}
1558
1559static int
1560api_is_ready (pTHX_ SV *coro_sv)
1561{
1562 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1563}
1564
1565INLINE void
1566prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1567{
1568 SV *prev_sv, *next_sv;
1569
1570 for (;;)
1571 {
1572 next_sv = coro_deq (aTHX);
1573
1574 /* nothing to schedule: call the idle handler */
1575 if (expect_false (!next_sv))
1576 {
1577 dSP;
1578
1579 ENTER;
1580 SAVETMPS;
1581
1582 PUSHMARK (SP);
1583 PUTBACK;
1584 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1585 SPAGAIN;
1586
1587 FREETMPS;
1588 LEAVE;
1589 continue;
1590 }
1591
1592 ta->next = SvSTATE_hv (next_sv);
1593
1594 /* cannot transfer to destroyed coros, skip and look for next */
1595 if (expect_false (ta->next->flags & CF_DESTROYED))
1596 {
1597 SvREFCNT_dec (next_sv);
1598 /* coro_nready has already been taken care of by destroy */
1599 continue;
1600 }
1601
1602 --coro_nready;
1603 break;
1604 }
1605
1606 /* free this only after the transfer */
1607 prev_sv = SvRV (coro_current);
1608 ta->prev = SvSTATE_hv (prev_sv);
1609 TRANSFER_CHECK (*ta);
1610 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1611 ta->next->flags &= ~CF_READY;
1612 SvRV_set (coro_current, next_sv);
1613
1614 free_coro_mortal (aTHX);
1615 coro_mortal = prev_sv;
1616}
1617
1618INLINE void
1619prepare_cede (pTHX_ struct coro_transfer_args *ta)
1620{
1621 api_ready (aTHX_ coro_current);
1622 prepare_schedule (aTHX_ ta);
1623}
1624
1625INLINE void
1626prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1627{
1628 SV *prev = SvRV (coro_current);
1629
1630 if (coro_nready)
1631 {
1632 prepare_schedule (aTHX_ ta);
1633 api_ready (aTHX_ prev);
1634 }
1635 else
1636 prepare_nop (aTHX_ ta);
1637}
1638
1639static void
1640api_schedule (pTHX)
1641{
1642 struct coro_transfer_args ta;
1643
1644 prepare_schedule (aTHX_ &ta);
1645 TRANSFER (ta, 1);
1646}
1647
1648static int
1649api_cede (pTHX)
1650{
1651 struct coro_transfer_args ta;
1652
1653 prepare_cede (aTHX_ &ta);
1654
1655 if (expect_true (ta.prev != ta.next))
1656 {
1657 TRANSFER (ta, 1);
1658 return 1;
1659 }
1660 else
1661 return 0;
1662}
1663
1664static int
1665api_cede_notself (pTHX)
1666{
1667 if (coro_nready)
1668 {
1669 struct coro_transfer_args ta;
1670
1671 prepare_cede_notself (aTHX_ &ta);
1672 TRANSFER (ta, 1);
1673 return 1;
1674 }
1675 else
1676 return 0;
1677}
1678
1679static void
1680api_trace (pTHX_ SV *coro_sv, int flags)
1681{
1682 struct coro *coro = SvSTATE (coro_sv);
1683
1684 if (flags & CC_TRACE)
1685 {
1686 if (!coro->cctx)
1687 coro->cctx = cctx_new_run ();
1688 else if (!(coro->cctx->flags & CC_TRACE))
1689 croak ("cannot enable tracing on coroutine with custom stack,");
1690
1691 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1692 }
1693 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1694 {
1695 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1696
1697 if (coro->flags & CF_RUNNING)
1698 PL_runops = RUNOPS_DEFAULT;
1699 else
1700 coro->slot->runops = RUNOPS_DEFAULT;
1701 }
1702}
1703
1704/*****************************************************************************/
1705/* PerlIO::cede */
1706
1707typedef struct
1708{
1709 PerlIOBuf base;
1710 NV next, every;
1711} PerlIOCede;
1712
1713static IV
1714PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1715{
1716 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1717
1718 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1719 self->next = nvtime () + self->every;
1720
1721 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
827} 1722}
828 1723
829static SV * 1724static SV *
830coro_deq (int min_prio) 1725PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
831{ 1726{
832 int prio = PRIO_MAX - PRIO_MIN; 1727 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
833 1728
834 min_prio -= PRIO_MIN; 1729 return newSVnv (self->every);
835 if (min_prio < 0) 1730}
836 min_prio = 0;
837 1731
838 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1732static IV
839 if (av_len (coro_ready[prio]) >= 0) 1733PerlIOCede_flush (pTHX_ PerlIO *f)
1734{
1735 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1736 double now = nvtime ();
1737
1738 if (now >= self->next)
1739 {
1740 api_cede (aTHX);
1741 self->next = now + self->every;
1742 }
1743
1744 return PerlIOBuf_flush (aTHX_ f);
1745}
1746
1747static PerlIO_funcs PerlIO_cede =
1748{
1749 sizeof(PerlIO_funcs),
1750 "cede",
1751 sizeof(PerlIOCede),
1752 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1753 PerlIOCede_pushed,
1754 PerlIOBuf_popped,
1755 PerlIOBuf_open,
1756 PerlIOBase_binmode,
1757 PerlIOCede_getarg,
1758 PerlIOBase_fileno,
1759 PerlIOBuf_dup,
1760 PerlIOBuf_read,
1761 PerlIOBuf_unread,
1762 PerlIOBuf_write,
1763 PerlIOBuf_seek,
1764 PerlIOBuf_tell,
1765 PerlIOBuf_close,
1766 PerlIOCede_flush,
1767 PerlIOBuf_fill,
1768 PerlIOBase_eof,
1769 PerlIOBase_error,
1770 PerlIOBase_clearerr,
1771 PerlIOBase_setlinebuf,
1772 PerlIOBuf_get_base,
1773 PerlIOBuf_bufsiz,
1774 PerlIOBuf_get_ptr,
1775 PerlIOBuf_get_cnt,
1776 PerlIOBuf_set_ptrcnt,
1777};
1778
1779/*****************************************************************************/
1780
1781static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1782static const CV *slf_cv;
1783static SV **slf_argv;
1784static int slf_argc, slf_arga; /* count, allocated */
1785static I32 slf_ax; /* top of stack, for restore */
1786
1787/* this restores the stack in the case we patched the entersub, to */
1788/* recreate the stack frame as perl will on following calls */
1789/* since entersub cleared the stack */
1790static OP *
1791pp_restore (pTHX)
1792{
1793 int i;
1794 SV **SP = PL_stack_base + slf_ax;
1795
1796 PUSHMARK (SP);
1797
1798 EXTEND (SP, slf_argc + 1);
1799
1800 for (i = 0; i < slf_argc; ++i)
1801 PUSHs (sv_2mortal (slf_argv [i]));
1802
1803 PUSHs ((SV *)CvGV (slf_cv));
1804
1805 RETURNOP (slf_restore.op_first);
1806}
1807
1808static void
1809slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1810{
1811 prepare_set_stacklevel (ta, (struct coro_cctx *)slf_frame.data);
1812}
1813
1814static void
1815slf_init_set_stacklevel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1816{
1817 assert (("FATAL: set_stacklevel needs the coro cctx as sole argument", items == 1));
1818
1819 frame->prepare = slf_prepare_set_stacklevel;
1820 frame->check = slf_check_nop;
1821 frame->data = (void *)SvIV (arg [0]);
1822}
1823
1824static void
1825slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1826{
1827 SV **arg = (SV **)slf_frame.data;
1828
1829 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1830}
1831
1832static void
1833slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1834{
1835 if (items != 2)
1836 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1837
1838 frame->prepare = slf_prepare_transfer;
1839 frame->check = slf_check_nop;
1840 frame->data = (void *)arg; /* let's hope it will stay valid */
1841}
1842
1843static void
1844slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1845{
1846 frame->prepare = prepare_schedule;
1847 frame->check = slf_check_nop;
1848}
1849
1850static void
1851slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1852{
1853 frame->prepare = prepare_cede;
1854 frame->check = slf_check_nop;
1855}
1856
1857static void
1858slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1859{
1860 frame->prepare = prepare_cede_notself;
1861 frame->check = slf_check_nop;
1862}
1863
1864/* we hijack an hopefully unused CV flag for our purposes */
1865#define CVf_SLF 0x4000
1866
1867/*
1868 * these not obviously related functions are all rolled into one
1869 * function to increase chances that they all will call transfer with the same
1870 * stack offset
1871 * SLF stands for "schedule-like-function".
1872 */
1873static OP *
1874pp_slf (pTHX)
1875{
1876 I32 checkmark; /* mark SP to see how many elements check has pushed */
1877
1878 /* set up the slf frame, unless it has already been set-up */
1879 /* the latter happens when a new coro has been started */
1880 /* or when a new cctx was attached to an existing coroutine */
1881 if (expect_true (!slf_frame.prepare))
1882 {
1883 /* first iteration */
1884 dSP;
1885 SV **arg = PL_stack_base + TOPMARK + 1;
1886 int items = SP - arg; /* args without function object */
1887 SV *gv = *sp;
1888
1889 /* do a quick consistency check on the "function" object, and if it isn't */
1890 /* for us, divert to the real entersub */
1891 if (SvTYPE (gv) != SVt_PVGV || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1892 return PL_ppaddr[OP_ENTERSUB](aTHX);
1893
1894 if (!(PL_op->op_flags & OPf_STACKED))
1895 {
1896 /* ampersand-form of call, use @_ instead of stack */
1897 AV *av = GvAV (PL_defgv);
1898 arg = AvARRAY (av);
1899 items = AvFILLp (av) + 1;
1900 }
1901
1902 /* now call the init function, which needs to set up slf_frame */
1903 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1904 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1905
1906 /* pop args */
1907 SP = PL_stack_base + POPMARK;
1908
1909 PUTBACK;
1910 }
1911
1912 /* now that we have a slf_frame, interpret it! */
1913 /* we use a callback system not to make the code needlessly */
1914 /* complicated, but so we can run multiple perl coros from one cctx */
1915
1916 do
1917 {
1918 struct coro_transfer_args ta;
1919
1920 slf_frame.prepare (aTHX_ &ta);
1921 TRANSFER (ta, 0);
1922
1923 checkmark = PL_stack_sp - PL_stack_base;
1924 }
1925 while (slf_frame.check (aTHX_ &slf_frame));
1926
1927 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1928
1929 /* return value handling - mostly like entersub */
1930 {
1931 dSP;
1932 SV **bot = PL_stack_base + checkmark;
1933 int gimme = GIMME_V;
1934
1935 /* make sure we put something on the stack in scalar context */
1936 if (gimme == G_SCALAR)
840 { 1937 {
841 coro_nready--; 1938 if (sp == bot)
842 return av_shift (coro_ready[prio]); 1939 XPUSHs (&PL_sv_undef);
1940
1941 SP = bot + 1;
843 } 1942 }
844 1943
1944 PUTBACK;
1945 }
1946
1947 /* exception handling */
1948 if (expect_false (coro_throw))
1949 {
1950 SV *exception = sv_2mortal (coro_throw);
1951
1952 coro_throw = 0;
1953 sv_setsv (ERRSV, exception);
1954 croak (0);
1955 }
1956
1957 return NORMAL;
1958}
1959
1960static void
1961api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1962{
1963 int i;
1964 SV **arg = PL_stack_base + ax;
1965 int items = PL_stack_sp - arg + 1;
1966
1967 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1968
1969 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1970 && PL_op->op_ppaddr != pp_slf)
1971 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1972
1973 CvFLAGS (cv) |= CVf_SLF;
1974 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1975 slf_cv = cv;
1976
1977 /* we patch the op, and then re-run the whole call */
1978 /* we have to put the same argument on the stack for this to work */
1979 /* and this will be done by pp_restore */
1980 slf_restore.op_next = (OP *)&slf_restore;
1981 slf_restore.op_type = OP_CUSTOM;
1982 slf_restore.op_ppaddr = pp_restore;
1983 slf_restore.op_first = PL_op;
1984
1985 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1986
1987 if (PL_op->op_flags & OPf_STACKED)
1988 {
1989 if (items > slf_arga)
1990 {
1991 slf_arga = items;
1992 free (slf_argv);
1993 slf_argv = malloc (slf_arga * sizeof (SV *));
1994 }
1995
1996 slf_argc = items;
1997
1998 for (i = 0; i < items; ++i)
1999 slf_argv [i] = SvREFCNT_inc (arg [i]);
2000 }
2001 else
2002 slf_argc = 0;
2003
2004 PL_op->op_ppaddr = pp_slf;
2005 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2006
2007 PL_op = (OP *)&slf_restore;
2008}
2009
2010/*****************************************************************************/
2011
2012static void
2013coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2014{
2015 SV *count_sv = AvARRAY (av)[0];
2016 IV count = SvIVX (count_sv);
2017
2018 count += adjust;
2019 SvIVX (count_sv) = count;
2020
2021 /* now wake up as many waiters as are expected to lock */
2022 while (count > 0 && AvFILLp (av) > 0)
2023 {
2024 SV *cb;
2025
2026 /* swap first two elements so we can shift a waiter */
2027 AvARRAY (av)[0] = AvARRAY (av)[1];
2028 AvARRAY (av)[1] = count_sv;
2029 cb = av_shift (av);
2030
2031 if (SvOBJECT (cb))
2032 api_ready (aTHX_ cb);
2033 else
2034 croak ("callbacks not yet supported");
2035
2036 SvREFCNT_dec (cb);
2037
2038 --count;
2039 }
2040}
2041
2042static void
2043coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2044{
2045 /* call $sem->adjust (0) to possibly wake up some other waiters */
2046 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2047}
2048
2049static int
2050slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2051{
2052 AV *av = (AV *)frame->data;
2053 SV *count_sv = AvARRAY (av)[0];
2054
2055 if (SvIVX (count_sv) > 0)
2056 {
2057 SvSTATE_current->on_destroy = 0;
2058 SvIVX (count_sv) = SvIVX (count_sv) - 1;
845 return 0; 2059 return 0;
846} 2060 }
2061 else
2062 {
2063 int i;
2064 /* if we were woken up but can't down, we look through the whole */
2065 /* waiters list and only add us if we aren't in there already */
2066 /* this avoids some degenerate memory usage cases */
847 2067
848static void 2068 for (i = 1; i <= AvFILLp (av); ++i)
849api_ready (SV *coro) 2069 if (AvARRAY (av)[i] == SvRV (coro_current))
850{ 2070 return 1;
851 coro_enq (SvREFCNT_inc (coro));
852}
853 2071
854static void 2072 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
855api_schedule (int cede) 2073 return 1;
856{ 2074 }
857 SV *prev, *next;
858
859 prev = GvSV (coro_current);
860
861 if (cede)
862 coro_enq (SvREFCNT_inc (prev));
863
864 next = coro_deq (PRIO_MIN);
865
866 if (!next)
867 next = SvREFCNT_inc (GvSV (coro_idle));
868
869 GvSV (coro_current) = SvREFCNT_inc (next);
870 transfer (aTHX_
871 sv_to_coro (prev, "Coro::schedule", "current coroutine"),
872 sv_to_coro (next, "Coro::schedule", "next coroutine"),
873 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
874 SvREFCNT_dec (next);
875 SvREFCNT_dec (prev);
876} 2075}
877 2076
2077static void
2078slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2079{
2080 AV *av = (AV *)SvRV (arg [0]);
2081
2082 if (SvIVX (AvARRAY (av)[0]) > 0)
2083 {
2084 frame->data = (void *)av;
2085 frame->prepare = prepare_nop;
2086 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2087 }
2088 else
2089 {
2090 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2091
2092 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2093 frame->prepare = prepare_schedule;
2094
2095 /* to avoid race conditions when a woken-up coro gets terminated */
2096 /* we arrange for a temporary on_destroy that calls adjust (0) */
2097 assert (!SvSTATE_current->on_destroy);//D
2098 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2099 }
2100
2101 frame->check = slf_check_semaphore_down;
2102
2103}
2104
2105/*****************************************************************************/
2106
2107#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2108
2109/* create a closure from XS, returns a code reference */
2110/* the arg can be accessed via GENSUB_ARG from the callback */
2111/* the callback must use dXSARGS/XSRETURN */
2112static SV *
2113gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2114{
2115 CV *cv = (CV *)NEWSV (0, 0);
2116
2117 sv_upgrade ((SV *)cv, SVt_PVCV);
2118
2119 CvANON_on (cv);
2120 CvISXSUB_on (cv);
2121 CvXSUB (cv) = xsub;
2122 GENSUB_ARG = arg;
2123
2124 return newRV_noinc ((SV *)cv);
2125}
2126
2127/*****************************************************************************/
2128
878MODULE = Coro::State PACKAGE = Coro::State 2129MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879 2130
880PROTOTYPES: ENABLE 2131PROTOTYPES: DISABLE
881 2132
882BOOT: 2133BOOT:
883{ /* {} necessary for stoopid perl-5.6.x */ 2134{
884 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2135#ifdef USE_ITHREADS
885 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2136# if CORO_PTHREAD
2137 coro_thx = PERL_GET_CONTEXT;
2138# endif
2139#endif
2140 BOOT_PAGESIZE;
2141
2142 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2143 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2144
2145 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2146 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2147 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2148
2149 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2150 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2151 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2152
886 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2153 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887 2154
888 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2155 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2156 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2157 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2158 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893 if (!padlist_cache)
894 padlist_cache = newHV ();
895 2159
896 main_mainstack = PL_mainstack; 2160 main_mainstack = PL_mainstack;
2161 main_top_env = PL_top_env;
897 2162
2163 while (main_top_env->je_prev)
2164 main_top_env = main_top_env->je_prev;
2165
2166 {
2167 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2168
2169 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2170 hv_store_ent (PL_custom_op_names, slf,
2171 newSVpv ("coro_slf", 0), 0);
2172
2173 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2174 hv_store_ent (PL_custom_op_descs, slf,
2175 newSVpv ("coro schedule like function", 0), 0);
2176 }
2177
898 coroapi.ver = CORO_API_VERSION; 2178 coroapi.ver = CORO_API_VERSION;
2179 coroapi.rev = CORO_API_REVISION;
2180
899 coroapi.transfer = api_transfer; 2181 coroapi.transfer = api_transfer;
900}
901 2182
902Coro::State 2183 coroapi.sv_state = SvSTATE_;
903_newprocess(args) 2184 coroapi.execute_slf = api_execute_slf;
904 SV * args 2185 coroapi.prepare_nop = prepare_nop;
905 PROTOTYPE: $ 2186 coroapi.prepare_schedule = prepare_schedule;
2187 coroapi.prepare_cede = prepare_cede;
2188 coroapi.prepare_cede_notself = prepare_cede_notself;
2189
2190 {
2191 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2192
2193 if (!svp) croak ("Time::HiRes is required");
2194 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2195
2196 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2197 }
2198
2199 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2200}
2201
2202SV *
2203new (char *klass, ...)
906 CODE: 2204 CODE:
907 Coro__State coro; 2205{
2206 struct coro *coro;
2207 MAGIC *mg;
2208 HV *hv;
2209 int i;
908 2210
909 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
910 croak ("Coro::State::_newprocess expects an arrayref");
911
912 New (0, coro, 1, struct coro); 2211 Newz (0, coro, 1, struct coro);
2212 coro->args = newAV ();
2213 coro->flags = CF_NEW;
913 2214
914 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2215 if (coro_first) coro_first->prev = coro;
915 coro->mainstack = 0; /* actual work is done inside transfer */ 2216 coro->next = coro_first;
916 coro->stack = 0; 2217 coro_first = coro;
917 2218
918 RETVAL = coro; 2219 coro->hv = hv = newHV ();
2220 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2221 mg->mg_flags |= MGf_DUP;
2222 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2223
2224 av_extend (coro->args, items - 1);
2225 for (i = 1; i < items; i++)
2226 av_push (coro->args, newSVsv (ST (i)));
2227}
919 OUTPUT: 2228 OUTPUT:
920 RETVAL 2229 RETVAL
921 2230
922void 2231void
923transfer(prev, next, flags) 2232_set_stacklevel (...)
924 Coro::State_or_hashref prev 2233 CODE:
925 Coro::State_or_hashref next 2234 CORO_EXECUTE_SLF_XS (slf_init_set_stacklevel);
926 int flags
927 PROTOTYPE: @
928 CODE:
929 PUTBACK;
930 transfer (aTHX_ prev, next, flags);
931 SPAGAIN;
932 2235
933void 2236void
934DESTROY(coro) 2237transfer (...)
935 Coro::State coro 2238 PROTOTYPE: $$
936 CODE: 2239 CODE:
2240 CORO_EXECUTE_SLF_XS (slf_init_transfer);
937 2241
938 if (coro->mainstack && coro->mainstack != main_mainstack) 2242bool
2243_destroy (SV *coro_sv)
2244 CODE:
2245 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2246 OUTPUT:
2247 RETVAL
2248
2249void
2250_exit (int code)
2251 PROTOTYPE: $
2252 CODE:
2253 _exit (code);
2254
2255int
2256cctx_stacksize (int new_stacksize = 0)
2257 PROTOTYPE: ;$
2258 CODE:
2259 RETVAL = cctx_stacksize;
2260 if (new_stacksize)
2261 {
2262 cctx_stacksize = new_stacksize;
2263 ++cctx_gen;
2264 }
2265 OUTPUT:
2266 RETVAL
2267
2268int
2269cctx_max_idle (int max_idle = 0)
2270 PROTOTYPE: ;$
2271 CODE:
2272 RETVAL = cctx_max_idle;
2273 if (max_idle > 1)
2274 cctx_max_idle = max_idle;
2275 OUTPUT:
2276 RETVAL
2277
2278int
2279cctx_count ()
2280 PROTOTYPE:
2281 CODE:
2282 RETVAL = cctx_count;
2283 OUTPUT:
2284 RETVAL
2285
2286int
2287cctx_idle ()
2288 PROTOTYPE:
2289 CODE:
2290 RETVAL = cctx_idle;
2291 OUTPUT:
2292 RETVAL
2293
2294void
2295list ()
2296 PROTOTYPE:
2297 PPCODE:
2298{
2299 struct coro *coro;
2300 for (coro = coro_first; coro; coro = coro->next)
2301 if (coro->hv)
2302 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2303}
2304
2305void
2306call (Coro::State coro, SV *coderef)
2307 ALIAS:
2308 eval = 1
2309 CODE:
2310{
2311 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
939 { 2312 {
940 struct coro temp; 2313 struct coro temp;
941 2314
2315 if (!(coro->flags & CF_RUNNING))
2316 {
2317 PUTBACK;
2318 save_perl (aTHX_ &temp);
2319 load_perl (aTHX_ coro);
2320 }
2321
2322 {
2323 dSP;
2324 ENTER;
2325 SAVETMPS;
942 PUTBACK; 2326 PUTBACK;
943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2327 PUSHSTACK;
944 LOAD(aTHX_ coro); 2328 PUSHMARK (SP);
2329
2330 if (ix)
2331 eval_sv (coderef, 0);
2332 else
2333 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2334
2335 POPSTACK;
945 SPAGAIN; 2336 SPAGAIN;
2337 FREETMPS;
2338 LEAVE;
2339 PUTBACK;
2340 }
946 2341
947 destroy_stacks (aTHX); 2342 if (!(coro->flags & CF_RUNNING))
948 2343 {
949 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2344 save_perl (aTHX_ coro);
2345 load_perl (aTHX_ &temp);
950 SPAGAIN; 2346 SPAGAIN;
951 2347 }
952 coro->mainstack = 0;
953 } 2348 }
2349}
954 2350
955 deallocate_stack (coro); 2351SV *
956 2352is_ready (Coro::State coro)
957 Safefree (coro); 2353 PROTOTYPE: $
2354 ALIAS:
2355 is_ready = CF_READY
2356 is_running = CF_RUNNING
2357 is_new = CF_NEW
2358 is_destroyed = CF_DESTROYED
2359 CODE:
2360 RETVAL = boolSV (coro->flags & ix);
2361 OUTPUT:
2362 RETVAL
958 2363
959void 2364void
960flush() 2365throw (Coro::State self, SV *throw = &PL_sv_undef)
961 CODE: 2366 PROTOTYPE: $;$
962#ifdef MAY_FLUSH 2367 CODE:
963 flush_padlist_cache (); 2368{
964#endif 2369 struct coro *current = SvSTATE_current;
2370 SV **throwp = self == current ? &coro_throw : &self->throw;
2371 SvREFCNT_dec (*throwp);
2372 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2373}
965 2374
966void 2375void
967_exit(code) 2376api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
968 int code 2377 PROTOTYPE: $;$
2378 C_ARGS: aTHX_ coro, flags
2379
2380SV *
2381has_cctx (Coro::State coro)
969 PROTOTYPE: $ 2382 PROTOTYPE: $
970 CODE: 2383 CODE:
971#if defined(__GLIBC__) || _POSIX_C_SOURCE 2384 RETVAL = boolSV (!!coro->cctx);
972 _exit (code); 2385 OUTPUT:
973#else 2386 RETVAL
974 signal (SIGTERM, SIG_DFL);
975 raise (SIGTERM);
976 exit (code);
977#endif
978 2387
979MODULE = Coro::State PACKAGE = Coro::Cont 2388int
2389is_traced (Coro::State coro)
2390 PROTOTYPE: $
2391 CODE:
2392 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2393 OUTPUT:
2394 RETVAL
980 2395
981# this is slightly dirty (should expose a c-level api) 2396UV
2397rss (Coro::State coro)
2398 PROTOTYPE: $
2399 ALIAS:
2400 usecount = 1
2401 CODE:
2402 switch (ix)
2403 {
2404 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2405 case 1: RETVAL = coro->usecount; break;
2406 }
2407 OUTPUT:
2408 RETVAL
982 2409
983void 2410void
984yield(...) 2411force_cctx ()
2412 PROTOTYPE:
2413 CODE:
2414 SvSTATE_current->cctx->idle_sp = 0;
2415
2416void
2417swap_defsv (Coro::State self)
985 PROTOTYPE: @ 2418 PROTOTYPE: $
2419 ALIAS:
2420 swap_defav = 1
986 CODE: 2421 CODE:
987 static SV *returnstk; 2422 if (!self->slot)
988 SV *sv; 2423 croak ("cannot swap state with coroutine that has no saved state,");
989 AV *defav = GvAV (PL_defgv); 2424 else
990 struct coro *prev, *next; 2425 {
2426 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2427 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
991 2428
992 if (!returnstk) 2429 SV *tmp = *src; *src = *dst; *dst = tmp;
993 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2430 }
994
995 /* set up @_ -- ugly */
996 av_clear (defav);
997 av_fill (defav, items - 1);
998 while (items--)
999 av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002 sv = av_pop ((AV *)SvRV (returnstk));
1003 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1004 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1005 SvREFCNT_dec (sv);
1006
1007 transfer(aTHX_ prev, next, 0);
1008 2431
1009MODULE = Coro::State PACKAGE = Coro 2432MODULE = Coro::State PACKAGE = Coro
1010 2433
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT: 2434BOOT:
1014{ 2435{
1015 int i; 2436 int i;
2437
2438 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2439 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2440 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2441
2442 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2443 SvREADONLY_on (coro_current);
2444
1016 HV *stash = gv_stashpv ("Coro", TRUE); 2445 coro_stash = gv_stashpv ("Coro", TRUE);
1017 2446
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2447 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2448 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2449 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2450 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2451 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2452 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024
1025 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027 2453
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2454 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029 coro_ready[i] = newAV (); 2455 coro_ready[i] = newAV ();
1030 2456
1031 { 2457 {
1032 SV *sv = perl_get_sv("Coro::API", 1); 2458 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1033 2459
1034 coroapi.schedule = api_schedule; 2460 coroapi.schedule = api_schedule;
2461 coroapi.cede = api_cede;
2462 coroapi.cede_notself = api_cede_notself;
1035 coroapi.ready = api_ready; 2463 coroapi.ready = api_ready;
2464 coroapi.is_ready = api_is_ready;
1036 coroapi.nready = &coro_nready; 2465 coroapi.nready = coro_nready;
1037 coroapi.current = coro_current; 2466 coroapi.current = coro_current;
1038 2467
1039 GCoroAPI = &coroapi; 2468 GCoroAPI = &coroapi;
1040 sv_setiv(sv, (IV)&coroapi); 2469 sv_setiv (sv, (IV)&coroapi);
1041 SvREADONLY_on(sv); 2470 SvREADONLY_on (sv);
1042 } 2471 }
1043} 2472}
1044 2473
1045void 2474void
1046ready(self) 2475schedule (...)
1047 SV * self
1048 CODE: 2476 CODE:
1049 api_ready (self); 2477 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2478
2479void
2480cede (...)
2481 CODE:
2482 CORO_EXECUTE_SLF_XS (slf_init_cede);
2483
2484void
2485cede_notself (...)
2486 CODE:
2487 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2488
2489void
2490_set_current (SV *current)
2491 PROTOTYPE: $
2492 CODE:
2493 SvREFCNT_dec (SvRV (coro_current));
2494 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2495
2496void
2497_set_readyhook (SV *hook)
2498 PROTOTYPE: $
2499 CODE:
2500 SvREFCNT_dec (coro_readyhook);
2501 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1050 2502
1051int 2503int
2504prio (Coro::State coro, int newprio = 0)
2505 PROTOTYPE: $;$
2506 ALIAS:
2507 nice = 1
2508 CODE:
2509{
2510 RETVAL = coro->prio;
2511
2512 if (items > 1)
2513 {
2514 if (ix)
2515 newprio = coro->prio - newprio;
2516
2517 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2518 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2519
2520 coro->prio = newprio;
2521 }
2522}
2523 OUTPUT:
2524 RETVAL
2525
2526SV *
2527ready (SV *self)
2528 PROTOTYPE: $
2529 CODE:
2530 RETVAL = boolSV (api_ready (aTHX_ self));
2531 OUTPUT:
2532 RETVAL
2533
2534int
1052nready(...) 2535nready (...)
1053 PROTOTYPE: 2536 PROTOTYPE:
1054 CODE: 2537 CODE:
1055 RETVAL = coro_nready; 2538 RETVAL = coro_nready;
1056 OUTPUT: 2539 OUTPUT:
1057 RETVAL 2540 RETVAL
1058 2541
2542# for async_pool speedup
1059void 2543void
1060schedule(...) 2544_pool_1 (SV *cb)
1061 PROTOTYPE:
1062 ALIAS:
1063 cede = 1
1064 CODE: 2545 CODE:
1065 api_schedule (ix); 2546{
2547 HV *hv = (HV *)SvRV (coro_current);
2548 struct coro *coro = SvSTATE_hv ((SV *)hv);
2549 AV *defav = GvAV (PL_defgv);
2550 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2551 AV *invoke_av;
2552 int i, len;
1066 2553
2554 if (!invoke)
2555 {
2556 SV *old = PL_diehook;
2557 PL_diehook = 0;
2558 SvREFCNT_dec (old);
2559 croak ("\3async_pool terminate\2\n");
2560 }
2561
2562 SvREFCNT_dec (coro->saved_deffh);
2563 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2564
2565 hv_store (hv, "desc", sizeof ("desc") - 1,
2566 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2567
2568 invoke_av = (AV *)SvRV (invoke);
2569 len = av_len (invoke_av);
2570
2571 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2572
2573 if (len > 0)
2574 {
2575 av_fill (defav, len - 1);
2576 for (i = 0; i < len; ++i)
2577 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2578 }
2579}
2580
2581void
2582_pool_2 (SV *cb)
2583 CODE:
2584{
2585 HV *hv = (HV *)SvRV (coro_current);
2586 struct coro *coro = SvSTATE_hv ((SV *)hv);
2587
2588 sv_setsv (cb, &PL_sv_undef);
2589
2590 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2591 coro->saved_deffh = 0;
2592
2593 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2594 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2595 {
2596 SV *old = PL_diehook;
2597 PL_diehook = 0;
2598 SvREFCNT_dec (old);
2599 croak ("\3async_pool terminate\2\n");
2600 }
2601
2602 av_clear (GvAV (PL_defgv));
2603 hv_store (hv, "desc", sizeof ("desc") - 1,
2604 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2605
2606 coro->prio = 0;
2607
2608 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2609 api_trace (aTHX_ coro_current, 0);
2610
2611 av_push (av_async_pool, newSVsv (coro_current));
2612}
2613
2614
2615MODULE = Coro::State PACKAGE = Coro::AIO
2616
2617void
2618_get_state (SV *self)
2619 PROTOTYPE: $
2620 PPCODE:
2621{
2622 AV *defav = GvAV (PL_defgv);
2623 AV *av = newAV ();
2624 int i;
2625 SV *data_sv = newSV (sizeof (struct io_state));
2626 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2627 SvCUR_set (data_sv, sizeof (struct io_state));
2628 SvPOK_only (data_sv);
2629
2630 data->errorno = errno;
2631 data->laststype = PL_laststype;
2632 data->laststatval = PL_laststatval;
2633 data->statcache = PL_statcache;
2634
2635 av_extend (av, AvFILLp (defav) + 1 + 1);
2636
2637 for (i = 0; i <= AvFILLp (defav); ++i)
2638 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2639
2640 av_push (av, data_sv);
2641
2642 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2643
2644 api_ready (aTHX_ self);
2645}
2646
2647void
2648_set_state (SV *state)
2649 PROTOTYPE: $
2650 PPCODE:
2651{
2652 AV *av = (AV *)SvRV (state);
2653 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2654 int i;
2655
2656 errno = data->errorno;
2657 PL_laststype = data->laststype;
2658 PL_laststatval = data->laststatval;
2659 PL_statcache = data->statcache;
2660
2661 EXTEND (SP, AvFILLp (av));
2662 for (i = 0; i < AvFILLp (av); ++i)
2663 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2664}
2665
2666
2667MODULE = Coro::State PACKAGE = Coro::AnyEvent
2668
2669BOOT:
2670 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2671
2672void
2673_schedule (...)
2674 CODE:
2675{
2676 static int incede;
2677
2678 api_cede_notself (aTHX);
2679
2680 ++incede;
2681 while (coro_nready >= incede && api_cede (aTHX))
2682 ;
2683
2684 sv_setsv (sv_activity, &PL_sv_undef);
2685 if (coro_nready >= incede)
2686 {
2687 PUSHMARK (SP);
2688 PUTBACK;
2689 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2690 SPAGAIN;
2691 }
2692
2693 --incede;
2694}
2695
2696
2697MODULE = Coro::State PACKAGE = PerlIO::cede
2698
2699BOOT:
2700 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2701
2702MODULE = Coro::State PACKAGE = Coro::Semaphore
2703
2704SV *
2705new (SV *klass, SV *count_ = 0)
2706 CODE:
2707{
2708 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2709 AV *av = newAV ();
2710 av_push (av, newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1));
2711 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2712}
2713 OUTPUT:
2714 RETVAL
2715
2716SV *
2717count (SV *self)
2718 CODE:
2719 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2720 OUTPUT:
2721 RETVAL
2722
2723void
2724up (SV *self, int adjust = 1)
2725 ALIAS:
2726 adjust = 1
2727 CODE:
2728 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2729
2730void
2731down (SV *self)
2732 CODE:
2733 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2734
2735void
2736try (SV *self)
2737 PPCODE:
2738{
2739 AV *av = (AV *)SvRV (self);
2740 SV *count_sv = AvARRAY (av)[0];
2741 IV count = SvIVX (count_sv);
2742
2743 if (count > 0)
2744 {
2745 --count;
2746 SvIVX (count_sv) = count;
2747 XSRETURN_YES;
2748 }
2749 else
2750 XSRETURN_NO;
2751}
2752
2753void
2754waiters (SV *self)
2755 CODE:
2756{
2757 AV *av = (AV *)SvRV (self);
2758
2759 if (GIMME_V == G_SCALAR)
2760 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2761 else
2762 {
2763 int i;
2764 EXTEND (SP, AvFILLp (av) + 1 - 1);
2765 for (i = 1; i <= AvFILLp (av); ++i)
2766 PUSHs (newSVsv (AvARRAY (av)[i]));
2767 }
2768}
2769

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