ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.25 by root, Wed Aug 15 03:24:07 2001 UTC vs.
Revision 1.295 by root, Tue Nov 18 10:35:01 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
6 12
7#include <signal.h> 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
19#endif 43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
20 48
21#define MAY_FLUSH /* increases codesize */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
22 52
23#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 54static int cctx_max_idle = 4;
25 55
26/* The next macro should delcare a variable stacklevel that contains and approximation 56#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 57 (PERL_REVISION > (a) \
28 * and should be unique. */ 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
128# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
30 131
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
133
134#if __GNUC__ >= 3
135# define attribute(x) __attribute__(x)
136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
138#else
139# define attribute(x)
140# define expect(expr,value) (expr)
141# define INLINE static
142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
146
147#define NOINLINE attribute ((noinline))
32 148
33#include "CoroAPI.h" 149#include "CoroAPI.h"
34 150
151#ifdef USE_ITHREADS
152# if CORO_PTHREAD
153static void *coro_thx;
154# endif
155#endif
156
157static double (*nvtime)(); /* so why doesn't it take void? */
158
159/* we hijack an hopefully unused CV flag for our purposes */
160#define CVf_SLF 0x4000
161static OP *pp_slf (pTHX);
162
163static U32 cctx_gen;
164static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 165static struct CoroAPI coroapi;
166static AV *main_mainstack; /* used to differentiate between $main and others */
167static JMPENV *main_top_env;
168static HV *coro_state_stash, *coro_stash;
169static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 170
37/* this is actually not only the c stack but also c registers etc... */ 171static GV *irsgv; /* $/ */
172static GV *stdoutgv; /* *STDOUT */
173static SV *rv_diehook;
174static SV *rv_warnhook;
175static HV *hv_sig; /* %SIG */
176
177/* async_pool helper stuff */
178static SV *sv_pool_rss;
179static SV *sv_pool_size;
180static AV *av_async_pool;
181
182/* Coro::AnyEvent */
183static SV *sv_activity;
184
185static struct coro_cctx *cctx_first;
186static int cctx_count, cctx_idle;
187
188enum {
189 CC_MAPPED = 0x01,
190 CC_NOREUSE = 0x02, /* throw this away after tracing */
191 CC_TRACE = 0x04,
192 CC_TRACE_SUB = 0x08, /* trace sub calls */
193 CC_TRACE_LINE = 0x10, /* trace each statement */
194 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
195};
196
197/* this is a structure representing a c-level coroutine */
38typedef struct { 198typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 199{
40 int usecnt; /* shared by how many coroutines */ 200 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 201
202 /* the stack */
203 void *sptr;
204 size_t ssize;
205
206 /* cpu state */
207 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
208 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
209 JMPENV *top_env;
43 coro_context cctx; 210 coro_context cctx;
44 211
45 void *sptr; 212 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 213#if CORO_USE_VALGRIND
47} coro_stack; 214 int valgrind_id;
215#endif
216 unsigned char flags;
217} coro_cctx;
48 218
219enum {
220 CF_RUNNING = 0x0001, /* coroutine is running */
221 CF_READY = 0x0002, /* coroutine is ready */
222 CF_NEW = 0x0004, /* has never been switched to */
223 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
224};
225
226/* the structure where most of the perl state is stored, overlaid on the cxstack */
227typedef struct
228{
229 SV *defsv;
230 AV *defav;
231 SV *errsv;
232 SV *irsgv;
233#define VAR(name,type) type name;
234# include "state.h"
235#undef VAR
236} perl_slots;
237
238#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
239
240/* this is a structure representing a perl-level coroutine */
49struct coro { 241struct coro {
50 /* the optional C context */ 242 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 243 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 244
55 /* optionally saved, might be zero */ 245 /* state data */
56 AV *defav; 246 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; 247 AV *mainstack;
68 SV **stack_sp; 248 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;
91 249
92 /* data associated with this coroutine (initial args) */ 250 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 251 int refcnt; /* coroutines are refcounted, yes */
252 int flags; /* CF_ flags */
253 HV *hv; /* the perl hash associated with this coro, if any */
254 void (*on_destroy)(pTHX_ struct coro *coro);
255
256 /* statistics */
257 int usecount; /* number of transfers to this coro */
258
259 /* coro process data */
260 int prio;
261 SV *throw; /* exception to be thrown */
262
263 /* async_pool */
264 SV *saved_deffh;
265
266 /* linked list */
267 struct coro *next, *prev;
94}; 268};
95 269
96typedef struct coro *Coro__State; 270typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 271typedef struct coro *Coro__State_or_hashref;
98 272
99static AV *main_mainstack; /* used to differentiate between $main and others */ 273/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 274/* and get copied between struct coro and these variables */
275/* the mainr easonw e don't support windows process emulation */
276static struct CoroSLF slf_frame; /* the current slf frame */
101static SV *ucoro_state_sv; 277static 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 AV *
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316
317 {
318 dSP;
319 CV *cv;
320
321 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs))
323 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist;
330#ifdef USE_THREADS
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 }
337
338 PUTBACK;
339 }
340}
341
342static void
343save_state(pTHX_ Coro__State c, int flags)
344{
345 {
346 dSP;
347 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo;
350
351 /*
352 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :(
354 */
355
356 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */
358 for (;;)
359 {
360 do
361 {
362 PERL_CONTEXT *cx = &ccstk[cxix--];
363
364 if (CxTYPE(cx) == CXt_SUB)
365 {
366 CV *cv = cx->blk_sub.cv;
367 if (CvDEPTH(cv))
368 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv));
384 PUSHs ((SV *)cv);
385
386 get_padlist (cv); /* this is a monster */
387 }
388 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 }
396 while (cxix >= 0);
397
398 if (top_si->si_type == PERLSI_MAIN)
399 break;
400
401 top_si = top_si->si_prev;
402 ccstk = top_si->si_cxstack;
403 cxix = top_si->si_cxix;
404 }
405
406 PUTBACK;
407 }
408
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412
413 /* I have not the slightest idea of why av_reify is necessary */
414 /* but if it's missing the defav contents magically get replaced sometimes */
415 if (c->defav)
416 av_reify (c->defav);
417
418 c->dowarn = PL_dowarn;
419 c->in_eval = PL_in_eval;
420
421 c->curstackinfo = PL_curstackinfo;
422 c->curstack = PL_curstack;
423 c->mainstack = PL_mainstack;
424 c->stack_sp = PL_stack_sp;
425 c->op = PL_op;
426 c->curpad = PL_curpad;
427 c->stack_base = PL_stack_base;
428 c->stack_max = PL_stack_max;
429 c->tmps_stack = PL_tmps_stack;
430 c->tmps_floor = PL_tmps_floor;
431 c->tmps_ix = PL_tmps_ix;
432 c->tmps_max = PL_tmps_max;
433 c->markstack = PL_markstack;
434 c->markstack_ptr = PL_markstack_ptr;
435 c->markstack_max = PL_markstack_max;
436 c->scopestack = PL_scopestack;
437 c->scopestack_ix = PL_scopestack_ix;
438 c->scopestack_max = PL_scopestack_max;
439 c->savestack = PL_savestack;
440 c->savestack_ix = PL_savestack_ix;
441 c->savestack_max = PL_savestack_max;
442 c->retstack = PL_retstack;
443 c->retstack_ix = PL_retstack_ix;
444 c->retstack_max = PL_retstack_max;
445 c->curcop = PL_curcop;
446 c->top_env = PL_top_env;
447}
448
449/*
450 * allocate various perl stacks. This is an exact copy
451 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need
453 * a lot of stackspace.
454 */
455STATIC void
456coro_init_stacks (pTHX)
457{
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
459 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462
463 PL_stack_base = AvARRAY(PL_curstack);
464 PL_stack_sp = PL_stack_base;
465 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466
467 New(50,PL_tmps_stack,96,SV*);
468 PL_tmps_floor = -1;
469 PL_tmps_ix = -1;
470 PL_tmps_max = 96;
471
472 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16;
475
476 SET_MARK_OFFSET;
477
478 New(54,PL_scopestack,16,I32);
479 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16;
481
482 New(54,PL_savestack,96,ANY);
483 PL_savestack_ix = 0;
484 PL_savestack_max = 96;
485
486 New(54,PL_retstack,8,OP*);
487 PL_retstack_ix = 0;
488 PL_retstack_max = 8;
489}
490
491/*
492 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */
495STATIC void
496destroy_stacks(pTHX)
497{
498 /* is this ugly, I ask? */
499 while (PL_scopestack_ix)
500 LEAVE;
501
502 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS;
505
506 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next;
508
509 while (PL_curstackinfo)
510 {
511 PERL_SI *p = PL_curstackinfo->si_prev;
512
513 {
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
520 dounwind(-1);
521
522 SvREFCNT_dec(PL_curstackinfo->si_stack);
523 Safefree(PL_curstackinfo->si_cxstack);
524 Safefree(PL_curstackinfo);
525 PL_curstackinfo = p;
526 }
527
528 Safefree(PL_tmps_stack);
529 Safefree(PL_markstack);
530 Safefree(PL_scopestack);
531 Safefree(PL_savestack);
532 Safefree(PL_retstack);
533}
534
535static void
536allocate_stack (Coro__State ctx, int alloc)
537{
538 coro_stack *stack;
539
540 New (0, stack, 1, coro_stack);
541
542 stack->refcnt = 1;
543 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0;
545 if (alloc)
546 {
547#ifdef HAVE_MMAP
548 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
550 if (stack->sptr == (void *)-1)
551#endif
552 {
553 /*FIXME*//*D*//* reasonable stack size! */
554 stack->ssize = -4096 * sizeof (long);
555 New (0, stack->sptr, 4096, long);
556 }
557 }
558 else
559 stack->sptr = 0;
560
561 ctx->stack = stack;
562}
563
564static void
565deallocate_stack (Coro__State ctx)
566{
567 coro_stack *stack = ctx->stack;
568
569 ctx->stack = 0;
570
571 if (stack)
572 {
573 if (!--stack->refcnt)
574 {
575#ifdef HAVE_MMAP
576 if (stack->ssize > 0 && stack->sptr)
577 munmap (stack->sptr, stack->ssize);
578 else
579#else
580 Safefree (stack->sptr);
581#endif
582 Safefree (stack);
583 }
584 else if (ctx->gencnt == stack->gencnt)
585 --stack->usecnt;
586 }
587}
588
589static void
590setup_coro (void *arg)
591{
592 /*
593 * emulate part of the perl startup here.
594 */
595 dSP;
596 Coro__State ctx = (Coro__State)arg;
597 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
598
599 coro_init_stacks (aTHX);
600 /*PL_curcop = 0;*/
601 /*PL_in_eval = PL_in_eval;*/ /* inherit */
602 SvREFCNT_dec (GvAV (PL_defgv));
603 GvAV (PL_defgv) = ctx->args;
604
605 SPAGAIN;
606
607 if (ctx->stack)
608 {
609 ctx->cursp = 0;
610
611 PUSHMARK(SP);
612 PUTBACK;
613 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
614
615 if (SvTRUE (ERRSV))
616 croak (NULL);
617 else
618 croak ("FATAL: CCTXT coroutine returned!");
619 }
620 else
621 {
622 UNOP myop;
623
624 PL_op = (OP *)&myop;
625
626 Zero(&myop, 1, UNOP);
627 myop.op_next = Nullop;
628 myop.op_flags = OPf_WANT_VOID;
629
630 PUSHMARK(SP);
631 XPUSHs (sub_init);
632 /*
633 * the next line is slightly wrong, as PL_op->op_next
634 * is actually being executed so we skip the first op.
635 * that doesn't matter, though, since it is only
636 * pp_nextstate and we never return...
637 * ah yes, and I don't care anyways ;)
638 */
639 PUTBACK;
640 PL_op = pp_entersub();
641 SPAGAIN;
642
643 ENTER; /* necessary e.g. for dounwind */
644 }
645}
646
647static void
648continue_coro (void *arg)
649{
650 /*
651 * this is a _very_ stripped down perl interpreter ;)
652 */
653 Coro__State ctx = (Coro__State)arg;
654
655 /*FIXME*//* must set up top_env here */
656 ctx->cursp = 0;
657 PL_op = PL_op->op_next;
658 CALLRUNOPS(aTHX);
659
660 abort ();
661}
662
663STATIC void
664transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
665{
666 dSP;
667 dSTACKLEVEL;
668
669 if (prev != next)
670 {
671 if (next->mainstack)
672 {
673 SAVE (prev, flags);
674 LOAD (next);
675
676 /* mark this state as in-use */
677 next->mainstack = 0;
678 next->tmps_ix = -2;
679
680 /* stacklevel changed? if yes, grab the stack for us! */
681 if (flags & TRANSFER_SAVE_CCTXT)
682 {
683 if (!prev->stack)
684 allocate_stack (prev, 0);
685 else if (prev->cursp != stacklevel
686 && prev->stack->usecnt > 1)
687 {
688 prev->gencnt = ++prev->stack->gencnt;
689 prev->stack->usecnt = 1;
690 }
691
692 /* has our stack been invalidated? */
693 if (next->stack && next->stack->gencnt != next->gencnt)
694 {
695 deallocate_stack (next);
696 allocate_stack (next, 1);
697 coro_create (&(next->stack->cctx),
698 continue_coro, (void *)next,
699 next->stack->sptr, labs (next->stack->ssize));
700 }
701
702 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703 }
704
705 }
706 else if (next->tmps_ix == -2)
707 croak ("tried to transfer to running coroutine");
708 else
709 {
710 SAVE (prev, -1); /* first get rid of the old state */
711
712 if (flags & TRANSFER_SAVE_CCTXT)
713 {
714 if (!prev->stack)
715 allocate_stack (prev, 0);
716
717 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718 {
719 setup_coro (next);
720
721 prev->stack->refcnt++;
722 prev->stack->usecnt++;
723 next->stack = prev->stack;
724 next->gencnt = prev->gencnt;
725 }
726 else
727 {
728 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx),
730 setup_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize));
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733 }
734 }
735 else
736 setup_coro (next);
737 }
738 }
739
740 next->cursp = stacklevel;
741}
742
743static struct coro *
744sv_to_coro (SV *arg, const char *funcname, const char *varname)
745{
746 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
747 {
748 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
749
750 if (!he)
751 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
752
753 arg = HeVAL(he);
754 }
755
756 /* must also be changed inside Coro::Cont::yield */
757 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758 return (struct coro *) SvIV((SV*)SvRV(arg));
759 else
760 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
761}
762
763static void
764api_transfer(pTHX_ SV *prev, SV *next, int flags)
765{
766 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),
767 sv_to_coro (next, "Coro::transfer", "next"),
768 flags);
769}
770 278
771/** Coro ********************************************************************/ 279/** Coro ********************************************************************/
772 280
773#define PRIO_MAX 3 281#define PRIO_MAX 3
774#define PRIO_HIGH 1 282#define PRIO_HIGH 1
… …
776#define PRIO_LOW -1 284#define PRIO_LOW -1
777#define PRIO_IDLE -3 285#define PRIO_IDLE -3
778#define PRIO_MIN -4 286#define PRIO_MIN -4
779 287
780/* for Coro.pm */ 288/* for Coro.pm */
781static GV *coro_current, *coro_idle; 289static SV *coro_current;
290static SV *coro_readyhook;
782static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 291static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
783static int coro_nready; 292static struct coro *coro_first;
293#define coro_nready coroapi.nready
784 294
785static void 295/** lowlevel stuff **********************************************************/
786coro_enq (SV *sv) 296
297static SV *
298coro_get_sv (pTHX_ const char *name, int create)
787{ 299{
788 if (SvROK (sv)) 300#if PERL_VERSION_ATLEAST (5,10,0)
301 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
302 get_sv (name, create);
303#endif
304 return get_sv (name, create);
305}
306
307static AV *
308coro_get_av (pTHX_ const char *name, int create)
309{
310#if PERL_VERSION_ATLEAST (5,10,0)
311 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
312 get_av (name, create);
313#endif
314 return get_av (name, create);
315}
316
317static HV *
318coro_get_hv (pTHX_ const char *name, int create)
319{
320#if PERL_VERSION_ATLEAST (5,10,0)
321 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
322 get_hv (name, create);
323#endif
324 return get_hv (name, create);
325}
326
327static AV *
328coro_clone_padlist (pTHX_ CV *cv)
329{
330 AV *padlist = CvPADLIST (cv);
331 AV *newpadlist, *newpad;
332
333 newpadlist = newAV ();
334 AvREAL_off (newpadlist);
335#if PERL_VERSION_ATLEAST (5,10,0)
336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
337#else
338 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
339#endif
340 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
341 --AvFILLp (padlist);
342
343 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
344 av_store (newpadlist, 1, (SV *)newpad);
345
346 return newpadlist;
347}
348
349static void
350free_padlist (pTHX_ AV *padlist)
351{
352 /* may be during global destruction */
353 if (SvREFCNT (padlist))
789 { 354 {
790 SV *hv = SvRV (sv); 355 I32 i = AvFILLp (padlist);
791 if (SvTYPE (hv) == SVt_PVHV) 356 while (i >= 0)
792 { 357 {
793 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 358 SV **svp = av_fetch (padlist, i--, FALSE);
794 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 359 if (svp)
360 {
361 SV *sv;
362 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
363 SvREFCNT_dec (sv);
795 364
796 prio = prio > PRIO_MAX ? PRIO_MAX 365 SvREFCNT_dec (*svp);
797 : prio < PRIO_MIN ? PRIO_MIN 366 }
798 : prio;
799
800 av_push (coro_ready [prio - PRIO_MIN], sv);
801 coro_nready++;
802
803 return;
804 } 367 }
368
369 SvREFCNT_dec ((SV*)padlist);
370 }
371}
372
373static int
374coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
375{
376 AV *padlist;
377 AV *av = (AV *)mg->mg_obj;
378
379 /* casting is fun. */
380 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
381 free_padlist (aTHX_ padlist);
382
383 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
384
385 return 0;
386}
387
388#define CORO_MAGIC_type_cv 26
389#define CORO_MAGIC_type_state PERL_MAGIC_ext
390
391static MGVTBL coro_cv_vtbl = {
392 0, 0, 0, 0,
393 coro_cv_free
394};
395
396#define CORO_MAGIC_NN(sv, type) \
397 (expect_true (SvMAGIC (sv)->mg_type == type) \
398 ? SvMAGIC (sv) \
399 : mg_find (sv, type))
400
401#define CORO_MAGIC(sv, type) \
402 (expect_true (SvMAGIC (sv)) \
403 ? CORO_MAGIC_NN (sv, type) \
404 : 0)
405
406#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
407#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
408
409INLINE struct coro *
410SvSTATE_ (pTHX_ SV *coro)
411{
412 HV *stash;
413 MAGIC *mg;
414
415 if (SvROK (coro))
416 coro = SvRV (coro);
417
418 if (expect_false (SvTYPE (coro) != SVt_PVHV))
419 croak ("Coro::State object required");
420
421 stash = SvSTASH (coro);
422 if (expect_false (stash != coro_stash && stash != coro_state_stash))
423 {
424 /* very slow, but rare, check */
425 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
426 croak ("Coro::State object required");
427 }
428
429 mg = CORO_MAGIC_state (coro);
430 return (struct coro *)mg->mg_ptr;
431}
432
433#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
434
435/* faster than SvSTATE, but expects a coroutine hv */
436#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
437#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
438
439/* the next two functions merely cache the padlists */
440static void
441get_padlist (pTHX_ CV *cv)
442{
443 MAGIC *mg = CORO_MAGIC_cv (cv);
444 AV *av;
445
446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
448 else
449 {
450#if CORO_PREFER_PERL_FUNCTIONS
451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
453 CV *cp = Perl_cv_clone (cv);
454 CvPADLIST (cv) = CvPADLIST (cp);
455 CvPADLIST (cp) = 0;
456 SvREFCNT_dec (cp);
457#else
458 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
459#endif
805 } 460 }
461}
806 462
807 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 463static void
464put_padlist (pTHX_ CV *cv)
465{
466 MAGIC *mg = CORO_MAGIC_cv (cv);
467 AV *av;
468
469 if (expect_false (!mg))
470 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
471
472 av = (AV *)mg->mg_obj;
473
474 if (expect_false (AvFILLp (av) >= AvMAX (av)))
475 av_extend (av, AvMAX (av) + 1);
476
477 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
478}
479
480/** load & save, init *******************************************************/
481
482static void
483load_perl (pTHX_ Coro__State c)
484{
485 perl_slots *slot = c->slot;
486 c->slot = 0;
487
488 PL_mainstack = c->mainstack;
489
490 GvSV (PL_defgv) = slot->defsv;
491 GvAV (PL_defgv) = slot->defav;
492 GvSV (PL_errgv) = slot->errsv;
493 GvSV (irsgv) = slot->irsgv;
494
495 #define VAR(name,type) PL_ ## name = slot->name;
496 # include "state.h"
497 #undef VAR
498
499 {
500 dSP;
501
502 CV *cv;
503
504 /* now do the ugly restore mess */
505 while (expect_true (cv = (CV *)POPs))
506 {
507 put_padlist (aTHX_ cv); /* mark this padlist as available */
508 CvDEPTH (cv) = PTR2IV (POPs);
509 CvPADLIST (cv) = (AV *)POPs;
510 }
511
512 PUTBACK;
513 }
514
515 slf_frame = c->slf_frame;
516 coro_throw = c->throw;
517}
518
519static void
520save_perl (pTHX_ Coro__State c)
521{
522 c->throw = coro_throw;
523 c->slf_frame = slf_frame;
524
525 {
526 dSP;
527 I32 cxix = cxstack_ix;
528 PERL_CONTEXT *ccstk = cxstack;
529 PERL_SI *top_si = PL_curstackinfo;
530
531 /*
532 * the worst thing you can imagine happens first - we have to save
533 * (and reinitialize) all cv's in the whole callchain :(
534 */
535
536 XPUSHs (Nullsv);
537 /* this loop was inspired by pp_caller */
538 for (;;)
539 {
540 while (expect_true (cxix >= 0))
541 {
542 PERL_CONTEXT *cx = &ccstk[cxix--];
543
544 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
545 {
546 CV *cv = cx->blk_sub.cv;
547
548 if (expect_true (CvDEPTH (cv)))
549 {
550 EXTEND (SP, 3);
551 PUSHs ((SV *)CvPADLIST (cv));
552 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
553 PUSHs ((SV *)cv);
554
555 CvDEPTH (cv) = 0;
556 get_padlist (aTHX_ cv);
557 }
558 }
559 }
560
561 if (expect_true (top_si->si_type == PERLSI_MAIN))
562 break;
563
564 top_si = top_si->si_prev;
565 ccstk = top_si->si_cxstack;
566 cxix = top_si->si_cxix;
567 }
568
569 PUTBACK;
570 }
571
572 /* allocate some space on the context stack for our purposes */
573 /* we manually unroll here, as usually 2 slots is enough */
574 if (SLOT_COUNT >= 1) CXINC;
575 if (SLOT_COUNT >= 2) CXINC;
576 if (SLOT_COUNT >= 3) CXINC;
577 {
578 int i;
579 for (i = 3; i < SLOT_COUNT; ++i)
580 CXINC;
581 }
582 cxstack_ix -= SLOT_COUNT; /* undo allocation */
583
584 c->mainstack = PL_mainstack;
585
586 {
587 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
588
589 slot->defav = GvAV (PL_defgv);
590 slot->defsv = DEFSV;
591 slot->errsv = ERRSV;
592 slot->irsgv = GvSV (irsgv);
593
594 #define VAR(name,type) slot->name = PL_ ## name;
595 # include "state.h"
596 #undef VAR
597 }
598}
599
600/*
601 * allocate various perl stacks. This is almost an exact copy
602 * of perl.c:init_stacks, except that it uses less memory
603 * on the (sometimes correct) assumption that coroutines do
604 * not usually need a lot of stackspace.
605 */
606#if CORO_PREFER_PERL_FUNCTIONS
607# define coro_init_stacks init_stacks
608#else
609static void
610coro_init_stacks (pTHX)
611{
612 PL_curstackinfo = new_stackinfo(32, 8);
613 PL_curstackinfo->si_type = PERLSI_MAIN;
614 PL_curstack = PL_curstackinfo->si_stack;
615 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
616
617 PL_stack_base = AvARRAY(PL_curstack);
618 PL_stack_sp = PL_stack_base;
619 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
620
621 New(50,PL_tmps_stack,32,SV*);
622 PL_tmps_floor = -1;
623 PL_tmps_ix = -1;
624 PL_tmps_max = 32;
625
626 New(54,PL_markstack,16,I32);
627 PL_markstack_ptr = PL_markstack;
628 PL_markstack_max = PL_markstack + 16;
629
630#ifdef SET_MARK_OFFSET
631 SET_MARK_OFFSET;
632#endif
633
634 New(54,PL_scopestack,8,I32);
635 PL_scopestack_ix = 0;
636 PL_scopestack_max = 8;
637
638 New(54,PL_savestack,24,ANY);
639 PL_savestack_ix = 0;
640 PL_savestack_max = 24;
641
642#if !PERL_VERSION_ATLEAST (5,10,0)
643 New(54,PL_retstack,4,OP*);
644 PL_retstack_ix = 0;
645 PL_retstack_max = 4;
646#endif
647}
648#endif
649
650/*
651 * destroy the stacks, the callchain etc...
652 */
653static void
654coro_destruct_stacks (pTHX)
655{
656 while (PL_curstackinfo->si_next)
657 PL_curstackinfo = PL_curstackinfo->si_next;
658
659 while (PL_curstackinfo)
660 {
661 PERL_SI *p = PL_curstackinfo->si_prev;
662
663 if (!IN_DESTRUCT)
664 SvREFCNT_dec (PL_curstackinfo->si_stack);
665
666 Safefree (PL_curstackinfo->si_cxstack);
667 Safefree (PL_curstackinfo);
668 PL_curstackinfo = p;
669 }
670
671 Safefree (PL_tmps_stack);
672 Safefree (PL_markstack);
673 Safefree (PL_scopestack);
674 Safefree (PL_savestack);
675#if !PERL_VERSION_ATLEAST (5,10,0)
676 Safefree (PL_retstack);
677#endif
678}
679
680static size_t
681coro_rss (pTHX_ struct coro *coro)
682{
683 size_t rss = sizeof (*coro);
684
685 if (coro->mainstack)
686 {
687 perl_slots tmp_slot;
688 perl_slots *slot;
689
690 if (coro->flags & CF_RUNNING)
691 {
692 slot = &tmp_slot;
693
694 #define VAR(name,type) slot->name = PL_ ## name;
695 # include "state.h"
696 #undef VAR
697 }
698 else
699 slot = coro->slot;
700
701 if (slot)
702 {
703 rss += sizeof (slot->curstackinfo);
704 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
705 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
706 rss += slot->tmps_max * sizeof (SV *);
707 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
708 rss += slot->scopestack_max * sizeof (I32);
709 rss += slot->savestack_max * sizeof (ANY);
710
711#if !PERL_VERSION_ATLEAST (5,10,0)
712 rss += slot->retstack_max * sizeof (OP *);
713#endif
714 }
715 }
716
717 return rss;
718}
719
720/** coroutine stack handling ************************************************/
721
722static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
723static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
725
726/* apparently < 5.8.8 */
727#ifndef MgPV_nolen_const
728#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
729 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
730 (const char*)(mg)->mg_ptr)
731#endif
732
733/*
734 * This overrides the default magic get method of %SIG elements.
735 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
736 * and instead of tryign to save and restore the hash elements, we just provide
737 * readback here.
738 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
739 * not expecting this to actually change the hook. This is a potential problem
740 * when a schedule happens then, but we ignore this.
741 */
742static int
743coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
744{
745 const char *s = MgPV_nolen_const (mg);
746
747 if (*s == '_')
748 {
749 SV **svp = 0;
750
751 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
752 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
753
754 if (svp)
755 {
756 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
757 return 0;
758 }
759 }
760
761 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
762}
763
764static int
765coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
766{
767 const char *s = MgPV_nolen_const (mg);
768
769 if (*s == '_')
770 {
771 SV **svp = 0;
772
773 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
774 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
775
776 if (svp)
777 {
778 SV *old = *svp;
779 *svp = 0;
780 SvREFCNT_dec (old);
781 return 0;
782 }
783 }
784
785 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
786}
787
788static int
789coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
790{
791 const char *s = MgPV_nolen_const (mg);
792
793 if (*s == '_')
794 {
795 SV **svp = 0;
796
797 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
798 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
799
800 if (svp)
801 {
802 SV *old = *svp;
803 *svp = newSVsv (sv);
804 SvREFCNT_dec (old);
805 return 0;
806 }
807 }
808
809 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
810}
811
812static void
813prepare_nop (pTHX_ struct coro_transfer_args *ta)
814{
815 /* kind of mega-hacky, but works */
816 ta->next = ta->prev = (struct coro *)ta;
817}
818
819static int
820slf_check_nop (pTHX_ struct CoroSLF *frame)
821{
822 return 0;
823}
824
825static UNOP coro_setup_op;
826
827static void NOINLINE /* noinline to keep it out of the transfer fast path */
828coro_setup (pTHX_ struct coro *coro)
829{
830 /*
831 * emulate part of the perl startup here.
832 */
833 coro_init_stacks (aTHX);
834
835 PL_runops = RUNOPS_DEFAULT;
836 PL_curcop = &PL_compiling;
837 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0;
839 PL_curpm = 0;
840 PL_curpad = 0;
841 PL_localizing = 0;
842 PL_dirty = 0;
843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
858
859 {
860 dSP;
861 UNOP myop;
862
863 Zero (&myop, 1, UNOP);
864 myop.op_next = Nullop;
865 myop.op_flags = OPf_WANT_VOID;
866
867 PUSHMARK (SP);
868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
869 PUTBACK;
870 PL_op = (OP *)&myop;
871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
872 SPAGAIN;
873 }
874
875 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
880
881 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
882 coro_setup_op.op_next = PL_op;
883 coro_setup_op.op_type = OP_CUSTOM;
884 coro_setup_op.op_ppaddr = pp_slf;
885 /* no flags required, as an init function won't be called */
886
887 PL_op = (OP *)&coro_setup_op;
888
889 /* copy throw, in case it was set before coro_setup */
890 coro_throw = coro->throw;
891}
892
893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
914 SvREFCNT_dec (GvAV (PL_defgv));
915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (coro_throw);
925
926 coro_destruct_stacks (aTHX);
927}
928
929INLINE void
930free_coro_mortal (pTHX)
931{
932 if (expect_true (coro_mortal))
933 {
934 SvREFCNT_dec (coro_mortal);
935 coro_mortal = 0;
936 }
937}
938
939static int
940runops_trace (pTHX)
941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 {
949 PERL_ASYNC_CHECK ();
950
951 if (cctx->flags & CC_TRACE_ALL)
952 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
954 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top;
957 AV *av = newAV (); /* return values */
958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
997 {
998 SV **cb;
999
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1001 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
1032 }
1033
1034 if (cctx->flags & CC_TRACE_LINE)
1035 {
1036 dSP;
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054 }
1055 }
1056 }
1057 }
1058
1059 TAINT_NOT;
1060 return 0;
1061}
1062
1063static struct coro_cctx *cctx_ssl_cctx;
1064static struct CoroSLF cctx_ssl_frame;
1065
1066static void
1067slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1068{
1069 ta->prev = (struct coro *)cctx_ssl_cctx;
1070 ta->next = 0;
1071}
1072
1073static int
1074slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1075{
1076 *frame = cctx_ssl_frame;
1077
1078 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1079}
1080
1081/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1082static void NOINLINE
1083cctx_prepare (pTHX_ coro_cctx *cctx)
1084{
1085 PL_top_env = &PL_start_env;
1086
1087 if (cctx->flags & CC_TRACE)
1088 PL_runops = runops_trace;
1089
1090 /* we already must be executing an SLF op, there is no other valid way
1091 * that can lead to creation of a new cctx */
1092 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1093 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1094
1095 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1096 cctx_ssl_cctx = cctx;
1097 cctx_ssl_frame = slf_frame;
1098
1099 slf_frame.prepare = slf_prepare_set_stacklevel;
1100 slf_frame.check = slf_check_set_stacklevel;
1101}
1102
1103/* the tail of transfer: execute stuff we can only do after a transfer */
1104INLINE void
1105transfer_tail (pTHX)
1106{
1107 free_coro_mortal (aTHX);
1108}
1109
1110/*
1111 * this is a _very_ stripped down perl interpreter ;)
1112 */
1113static void
1114cctx_run (void *arg)
1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1122 dTHX;
1123
1124 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */
1127
1128 /* inject a fake subroutine call to cctx_init */
1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 transfer_tail (aTHX);
1133
1134 /* somebody or something will hit me for both perl_run and PL_restartop */
1135 PL_restartop = PL_op;
1136 perl_run (PL_curinterp);
1137
1138 /*
1139 * If perl-run returns we assume exit() was being called or the coro
1140 * fell off the end, which seems to be the only valid (non-bug)
1141 * reason for perl_run to return. We try to exit by jumping to the
1142 * bootstrap-time "top" top_env, as we cannot restore the "main"
1143 * coroutine as Coro has no such concept
1144 */
1145 PL_top_env = main_top_env;
1146 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1147 }
1148}
1149
1150static coro_cctx *
1151cctx_new ()
1152{
1153 coro_cctx *cctx;
1154
1155 ++cctx_count;
1156 New (0, cctx, 1, coro_cctx);
1157
1158 cctx->gen = cctx_gen;
1159 cctx->flags = 0;
1160 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1161
1162 return cctx;
1163}
1164
1165/* create a new cctx only suitable as source */
1166static coro_cctx *
1167cctx_new_empty ()
1168{
1169 coro_cctx *cctx = cctx_new ();
1170
1171 cctx->sptr = 0;
1172 coro_create (&cctx->cctx, 0, 0, 0, 0);
1173
1174 return cctx;
1175}
1176
1177/* create a new cctx suitable as destination/running a perl interpreter */
1178static coro_cctx *
1179cctx_new_run ()
1180{
1181 coro_cctx *cctx = cctx_new ();
1182 void *stack_start;
1183 size_t stack_size;
1184
1185#if HAVE_MMAP
1186 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1187 /* mmap supposedly does allocate-on-write for us */
1188 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1189
1190 if (cctx->sptr != (void *)-1)
1191 {
1192 #if CORO_STACKGUARD
1193 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1194 #endif
1195 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1196 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1197 cctx->flags |= CC_MAPPED;
1198 }
1199 else
1200#endif
1201 {
1202 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1203 New (0, cctx->sptr, cctx_stacksize, long);
1204
1205 if (!cctx->sptr)
1206 {
1207 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1208 _exit (EXIT_FAILURE);
1209 }
1210
1211 stack_start = cctx->sptr;
1212 stack_size = cctx->ssize;
1213 }
1214
1215 #if CORO_USE_VALGRIND
1216 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1217 #endif
1218
1219 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1220
1221 return cctx;
1222}
1223
1224static void
1225cctx_destroy (coro_cctx *cctx)
1226{
1227 if (!cctx)
1228 return;
1229
1230 --cctx_count;
1231 coro_destroy (&cctx->cctx);
1232
1233 /* coro_transfer creates new, empty cctx's */
1234 if (cctx->sptr)
1235 {
1236 #if CORO_USE_VALGRIND
1237 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1238 #endif
1239
1240#if HAVE_MMAP
1241 if (cctx->flags & CC_MAPPED)
1242 munmap (cctx->sptr, cctx->ssize);
1243 else
1244#endif
1245 Safefree (cctx->sptr);
1246 }
1247
1248 Safefree (cctx);
1249}
1250
1251/* wether this cctx should be destructed */
1252#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1253
1254static coro_cctx *
1255cctx_get (pTHX)
1256{
1257 while (expect_true (cctx_first))
1258 {
1259 coro_cctx *cctx = cctx_first;
1260 cctx_first = cctx->next;
1261 --cctx_idle;
1262
1263 if (expect_true (!CCTX_EXPIRED (cctx)))
1264 return cctx;
1265
1266 cctx_destroy (cctx);
1267 }
1268
1269 return cctx_new_run ();
1270}
1271
1272static void
1273cctx_put (coro_cctx *cctx)
1274{
1275 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1276
1277 /* free another cctx if overlimit */
1278 if (expect_false (cctx_idle >= cctx_max_idle))
1279 {
1280 coro_cctx *first = cctx_first;
1281 cctx_first = first->next;
1282 --cctx_idle;
1283
1284 cctx_destroy (first);
1285 }
1286
1287 ++cctx_idle;
1288 cctx->next = cctx_first;
1289 cctx_first = cctx;
1290}
1291
1292/** coroutine switching *****************************************************/
1293
1294static void
1295transfer_check (pTHX_ struct coro *prev, struct coro *next)
1296{
1297 /* TODO: throwing up here is considered harmful */
1298
1299 if (expect_true (prev != next))
1300 {
1301 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1302 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1303
1304 if (expect_false (next->flags & CF_RUNNING))
1305 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1306
1307 if (expect_false (next->flags & CF_DESTROYED))
1308 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1309
1310#if !PERL_VERSION_ATLEAST (5,10,0)
1311 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1312 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1313#endif
1314 }
1315}
1316
1317/* always use the TRANSFER macro */
1318static void NOINLINE /* noinline so we have a fixed stackframe */
1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1320{
1321 dSTACKLEVEL;
1322
1323 /* sometimes transfer is only called to set idle_sp */
1324 if (expect_false (!next))
1325 {
1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1327 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1328 }
1329 else if (expect_true (prev != next))
1330 {
1331 coro_cctx *prev__cctx;
1332
1333 if (expect_false (prev->flags & CF_NEW))
1334 {
1335 /* create a new empty/source context */
1336 prev->cctx = cctx_new_empty ();
1337 prev->flags &= ~CF_NEW;
1338 prev->flags |= CF_RUNNING;
1339 }
1340
1341 prev->flags &= ~CF_RUNNING;
1342 next->flags |= CF_RUNNING;
1343
1344 /* first get rid of the old state */
1345 save_perl (aTHX_ prev);
1346
1347 if (expect_false (next->flags & CF_NEW))
1348 {
1349 /* need to start coroutine */
1350 next->flags &= ~CF_NEW;
1351 /* setup coroutine call */
1352 coro_setup (aTHX_ next);
1353 }
1354 else
1355 load_perl (aTHX_ next);
1356
1357 prev__cctx = prev->cctx;
1358
1359 /* possibly untie and reuse the cctx */
1360 if (expect_true (
1361 prev__cctx->idle_sp == STACKLEVEL
1362 && !(prev__cctx->flags & CC_TRACE)
1363 && !force_cctx
1364 ))
1365 {
1366 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1367 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1368
1369 prev->cctx = 0;
1370
1371 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1372 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1373 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1374 if (!next->cctx)
1375 next->cctx = cctx_get (aTHX);
1376
1377 cctx_put (prev__cctx);
1378 }
1379
1380 ++next->usecount;
1381
1382 if (expect_true (!next->cctx))
1383 next->cctx = cctx_get (aTHX);
1384
1385 if (expect_false (prev__cctx != next->cctx))
1386 {
1387 prev__cctx->top_env = PL_top_env;
1388 PL_top_env = next->cctx->top_env;
1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1390 }
1391
1392 transfer_tail (aTHX);
1393 }
1394}
1395
1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1398
1399/** high level stuff ********************************************************/
1400
1401static int
1402coro_state_destroy (pTHX_ struct coro *coro)
1403{
1404 if (coro->flags & CF_DESTROYED)
1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1409
1410 coro->flags |= CF_DESTROYED;
1411
1412 if (coro->flags & CF_READY)
1413 {
1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1415 /* alternative: look through all ready queues and remove the coro */
1416 --coro_nready;
1417 }
1418 else
1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1420
1421 if (coro->mainstack && coro->mainstack != main_mainstack)
1422 {
1423 struct coro temp;
1424
1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1426
1427 save_perl (aTHX_ &temp);
1428 load_perl (aTHX_ coro);
1429
1430 coro_destruct (aTHX_ coro);
1431
1432 load_perl (aTHX_ &temp);
1433
1434 coro->slot = 0;
1435 }
1436
1437 cctx_destroy (coro->cctx);
1438 SvREFCNT_dec (coro->args);
1439
1440 if (coro->next) coro->next->prev = coro->prev;
1441 if (coro->prev) coro->prev->next = coro->next;
1442 if (coro == coro_first) coro_first = coro->next;
1443
1444 return 1;
1445}
1446
1447static int
1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1449{
1450 struct coro *coro = (struct coro *)mg->mg_ptr;
1451 mg->mg_ptr = 0;
1452
1453 coro->hv = 0;
1454
1455 if (--coro->refcnt < 0)
1456 {
1457 coro_state_destroy (aTHX_ coro);
1458 Safefree (coro);
1459 }
1460
1461 return 0;
1462}
1463
1464static int
1465coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1466{
1467 struct coro *coro = (struct coro *)mg->mg_ptr;
1468
1469 ++coro->refcnt;
1470
1471 return 0;
1472}
1473
1474static MGVTBL coro_state_vtbl = {
1475 0, 0, 0, 0,
1476 coro_state_free,
1477 0,
1478#ifdef MGf_DUP
1479 coro_state_dup,
1480#else
1481# define MGf_DUP 0
1482#endif
1483};
1484
1485static void
1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1487{
1488 ta->prev = SvSTATE (prev_sv);
1489 ta->next = SvSTATE (next_sv);
1490 TRANSFER_CHECK (*ta);
1491}
1492
1493static void
1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1495{
1496 struct coro_transfer_args ta;
1497
1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1499 TRANSFER (ta, 1);
1500}
1501
1502/** Coro ********************************************************************/
1503
1504INLINE void
1505coro_enq (pTHX_ struct coro *coro)
1506{
1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1508}
1509
1510INLINE SV *
1511coro_deq (pTHX)
1512{
1513 int prio;
1514
1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1516 if (AvFILLp (coro_ready [prio]) >= 0)
1517 return av_shift (coro_ready [prio]);
1518
1519 return 0;
1520}
1521
1522static int
1523api_ready (pTHX_ SV *coro_sv)
1524{
1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
1528
1529 if (SvROK (coro_sv))
1530 coro_sv = SvRV (coro_sv);
1531
1532 coro = SvSTATE (coro_sv);
1533
1534 if (coro->flags & CF_READY)
1535 return 0;
1536
1537 coro->flags |= CF_READY;
1538
1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
1543 ++coro_nready;
1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_VOID | G_DISCARD);
1555
1556 FREETMPS;
1557 LEAVE;
1558 }
1559
1560 if (xs_hook)
1561 xs_hook ();
1562
1563 return 1;
1564}
1565
1566static int
1567api_is_ready (pTHX_ SV *coro_sv)
1568{
1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1570}
1571
1572INLINE void
1573prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1574{
1575 SV *prev_sv, *next_sv;
1576
1577 for (;;)
1578 {
1579 next_sv = coro_deq (aTHX);
1580
1581 /* nothing to schedule: call the idle handler */
1582 if (expect_false (!next_sv))
1583 {
1584 dSP;
1585
1586 ENTER;
1587 SAVETMPS;
1588
1589 PUSHMARK (SP);
1590 PUTBACK;
1591 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1592
1593 FREETMPS;
1594 LEAVE;
1595 continue;
1596 }
1597
1598 ta->next = SvSTATE_hv (next_sv);
1599
1600 /* cannot transfer to destroyed coros, skip and look for next */
1601 if (expect_false (ta->next->flags & CF_DESTROYED))
1602 {
1603 SvREFCNT_dec (next_sv);
1604 /* coro_nready has already been taken care of by destroy */
1605 continue;
1606 }
1607
1608 --coro_nready;
1609 break;
1610 }
1611
1612 /* free this only after the transfer */
1613 prev_sv = SvRV (coro_current);
1614 ta->prev = SvSTATE_hv (prev_sv);
1615 TRANSFER_CHECK (*ta);
1616 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1617 ta->next->flags &= ~CF_READY;
1618 SvRV_set (coro_current, next_sv);
1619
1620 free_coro_mortal (aTHX);
1621 coro_mortal = prev_sv;
1622}
1623
1624INLINE void
1625prepare_cede (pTHX_ struct coro_transfer_args *ta)
1626{
1627 api_ready (aTHX_ coro_current);
1628 prepare_schedule (aTHX_ ta);
1629}
1630
1631INLINE void
1632prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1633{
1634 SV *prev = SvRV (coro_current);
1635
1636 if (coro_nready)
1637 {
1638 prepare_schedule (aTHX_ ta);
1639 api_ready (aTHX_ prev);
1640 }
1641 else
1642 prepare_nop (aTHX_ ta);
1643}
1644
1645static void
1646api_schedule (pTHX)
1647{
1648 struct coro_transfer_args ta;
1649
1650 prepare_schedule (aTHX_ &ta);
1651 TRANSFER (ta, 1);
1652}
1653
1654static int
1655api_cede (pTHX)
1656{
1657 struct coro_transfer_args ta;
1658
1659 prepare_cede (aTHX_ &ta);
1660
1661 if (expect_true (ta.prev != ta.next))
1662 {
1663 TRANSFER (ta, 1);
1664 return 1;
1665 }
1666 else
1667 return 0;
1668}
1669
1670static int
1671api_cede_notself (pTHX)
1672{
1673 if (coro_nready)
1674 {
1675 struct coro_transfer_args ta;
1676
1677 prepare_cede_notself (aTHX_ &ta);
1678 TRANSFER (ta, 1);
1679 return 1;
1680 }
1681 else
1682 return 0;
1683}
1684
1685static void
1686api_trace (pTHX_ SV *coro_sv, int flags)
1687{
1688 struct coro *coro = SvSTATE (coro_sv);
1689
1690 if (flags & CC_TRACE)
1691 {
1692 if (!coro->cctx)
1693 coro->cctx = cctx_new_run ();
1694 else if (!(coro->cctx->flags & CC_TRACE))
1695 croak ("cannot enable tracing on coroutine with custom stack,");
1696
1697 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1698 }
1699 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1700 {
1701 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1702
1703 if (coro->flags & CF_RUNNING)
1704 PL_runops = RUNOPS_DEFAULT;
1705 else
1706 coro->slot->runops = RUNOPS_DEFAULT;
1707 }
1708}
1709
1710/*****************************************************************************/
1711/* schedule-like-function opcode (SLF) */
1712
1713static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1714static const CV *slf_cv;
1715static SV **slf_argv;
1716static int slf_argc, slf_arga; /* count, allocated */
1717static I32 slf_ax; /* top of stack, for restore */
1718
1719/* this restores the stack in the case we patched the entersub, to */
1720/* recreate the stack frame as perl will on following calls */
1721/* since entersub cleared the stack */
1722static OP *
1723pp_restore (pTHX)
1724{
1725 int i;
1726 SV **SP = PL_stack_base + slf_ax;
1727
1728 PUSHMARK (SP);
1729
1730 EXTEND (SP, slf_argc + 1);
1731
1732 for (i = 0; i < slf_argc; ++i)
1733 PUSHs (sv_2mortal (slf_argv [i]));
1734
1735 PUSHs ((SV *)CvGV (slf_cv));
1736
1737 RETURNOP (slf_restore.op_first);
1738}
1739
1740static void
1741slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1742{
1743 SV **arg = (SV **)slf_frame.data;
1744
1745 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1746}
1747
1748static void
1749slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1750{
1751 if (items != 2)
1752 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1753
1754 frame->prepare = slf_prepare_transfer;
1755 frame->check = slf_check_nop;
1756 frame->data = (void *)arg; /* let's hope it will stay valid */
1757}
1758
1759static void
1760slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1761{
1762 frame->prepare = prepare_schedule;
1763 frame->check = slf_check_nop;
1764}
1765
1766static void
1767slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1768{
1769 frame->prepare = prepare_cede;
1770 frame->check = slf_check_nop;
1771}
1772
1773static void
1774slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1775{
1776 frame->prepare = prepare_cede_notself;
1777 frame->check = slf_check_nop;
1778}
1779
1780/*
1781 * these not obviously related functions are all rolled into one
1782 * function to increase chances that they all will call transfer with the same
1783 * stack offset
1784 * SLF stands for "schedule-like-function".
1785 */
1786static OP *
1787pp_slf (pTHX)
1788{
1789 I32 checkmark; /* mark SP to see how many elements check has pushed */
1790
1791 /* set up the slf frame, unless it has already been set-up */
1792 /* the latter happens when a new coro has been started */
1793 /* or when a new cctx was attached to an existing coroutine */
1794 if (expect_true (!slf_frame.prepare))
1795 {
1796 /* first iteration */
1797 dSP;
1798 SV **arg = PL_stack_base + TOPMARK + 1;
1799 int items = SP - arg; /* args without function object */
1800 SV *gv = *sp;
1801
1802 /* do a quick consistency check on the "function" object, and if it isn't */
1803 /* for us, divert to the real entersub */
1804 if (SvTYPE (gv) != SVt_PVGV
1805 || !GvCV (gv)
1806 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1807 return PL_ppaddr[OP_ENTERSUB](aTHX);
1808
1809 if (!(PL_op->op_flags & OPf_STACKED))
1810 {
1811 /* ampersand-form of call, use @_ instead of stack */
1812 AV *av = GvAV (PL_defgv);
1813 arg = AvARRAY (av);
1814 items = AvFILLp (av) + 1;
1815 }
1816
1817 /* now call the init function, which needs to set up slf_frame */
1818 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1819 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1820
1821 /* pop args */
1822 SP = PL_stack_base + POPMARK;
1823
1824 PUTBACK;
1825 }
1826
1827 /* now that we have a slf_frame, interpret it! */
1828 /* we use a callback system not to make the code needlessly */
1829 /* complicated, but so we can run multiple perl coros from one cctx */
1830
1831 do
1832 {
1833 struct coro_transfer_args ta;
1834
1835 slf_frame.prepare (aTHX_ &ta);
1836 TRANSFER (ta, 0);
1837
1838 checkmark = PL_stack_sp - PL_stack_base;
1839 }
1840 while (slf_frame.check (aTHX_ &slf_frame));
1841
1842 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1843
1844 /* return value handling - mostly like entersub */
1845 /* make sure we put something on the stack in scalar context */
1846 if (GIMME_V == G_SCALAR)
1847 {
1848 dSP;
1849 SV **bot = PL_stack_base + checkmark;
1850
1851 if (sp == bot) /* too few, push undef */
1852 bot [1] = &PL_sv_undef;
1853 else if (sp != bot + 1) /* too many, take last one */
1854 bot [1] = *sp;
1855
1856 SP = bot + 1;
1857
1858 PUTBACK;
1859 }
1860
1861 /* exception handling */
1862 if (expect_false (coro_throw))
1863 {
1864 SV *exception = sv_2mortal (coro_throw);
1865
1866 coro_throw = 0;
1867 sv_setsv (ERRSV, exception);
1868 croak (0);
1869 }
1870
1871 return NORMAL;
1872}
1873
1874static void
1875api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1876{
1877 int i;
1878 SV **arg = PL_stack_base + ax;
1879 int items = PL_stack_sp - arg + 1;
1880
1881 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1882
1883 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1884 && PL_op->op_ppaddr != pp_slf)
1885 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1886
1887 CvFLAGS (cv) |= CVf_SLF;
1888 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1889 slf_cv = cv;
1890
1891 /* we patch the op, and then re-run the whole call */
1892 /* we have to put the same argument on the stack for this to work */
1893 /* and this will be done by pp_restore */
1894 slf_restore.op_next = (OP *)&slf_restore;
1895 slf_restore.op_type = OP_CUSTOM;
1896 slf_restore.op_ppaddr = pp_restore;
1897 slf_restore.op_first = PL_op;
1898
1899 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1900
1901 if (PL_op->op_flags & OPf_STACKED)
1902 {
1903 if (items > slf_arga)
1904 {
1905 slf_arga = items;
1906 free (slf_argv);
1907 slf_argv = malloc (slf_arga * sizeof (SV *));
1908 }
1909
1910 slf_argc = items;
1911
1912 for (i = 0; i < items; ++i)
1913 slf_argv [i] = SvREFCNT_inc (arg [i]);
1914 }
1915 else
1916 slf_argc = 0;
1917
1918 PL_op->op_ppaddr = pp_slf;
1919 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1920
1921 PL_op = (OP *)&slf_restore;
1922}
1923
1924/*****************************************************************************/
1925/* PerlIO::cede */
1926
1927typedef struct
1928{
1929 PerlIOBuf base;
1930 NV next, every;
1931} PerlIOCede;
1932
1933static IV
1934PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1935{
1936 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1937
1938 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1939 self->next = nvtime () + self->every;
1940
1941 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
808} 1942}
809 1943
810static SV * 1944static SV *
811coro_deq (int min_prio) 1945PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
812{ 1946{
813 int prio = PRIO_MAX - PRIO_MIN; 1947 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
814 1948
815 min_prio -= PRIO_MIN; 1949 return newSVnv (self->every);
816 if (min_prio < 0) 1950}
817 min_prio = 0;
818 1951
819 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1952static IV
820 if (av_len (coro_ready[prio]) >= 0) 1953PerlIOCede_flush (pTHX_ PerlIO *f)
1954{
1955 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1956 double now = nvtime ();
1957
1958 if (now >= self->next)
821 { 1959 {
822 coro_nready--; 1960 api_cede (aTHX);
823 return av_shift (coro_ready[prio]); 1961 self->next = now + self->every;
824 } 1962 }
1963
1964 return PerlIOBuf_flush (aTHX_ f);
1965}
1966
1967static PerlIO_funcs PerlIO_cede =
1968{
1969 sizeof(PerlIO_funcs),
1970 "cede",
1971 sizeof(PerlIOCede),
1972 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1973 PerlIOCede_pushed,
1974 PerlIOBuf_popped,
1975 PerlIOBuf_open,
1976 PerlIOBase_binmode,
1977 PerlIOCede_getarg,
1978 PerlIOBase_fileno,
1979 PerlIOBuf_dup,
1980 PerlIOBuf_read,
1981 PerlIOBuf_unread,
1982 PerlIOBuf_write,
1983 PerlIOBuf_seek,
1984 PerlIOBuf_tell,
1985 PerlIOBuf_close,
1986 PerlIOCede_flush,
1987 PerlIOBuf_fill,
1988 PerlIOBase_eof,
1989 PerlIOBase_error,
1990 PerlIOBase_clearerr,
1991 PerlIOBase_setlinebuf,
1992 PerlIOBuf_get_base,
1993 PerlIOBuf_bufsiz,
1994 PerlIOBuf_get_ptr,
1995 PerlIOBuf_get_cnt,
1996 PerlIOBuf_set_ptrcnt,
1997};
1998
1999/*****************************************************************************/
2000/* Coro::Semaphore */
2001
2002static void
2003coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2004{
2005 SV *count_sv = AvARRAY (av)[0];
2006 IV count = SvIVX (count_sv);
2007
2008 count += adjust;
2009 SvIVX (count_sv) = count;
2010
2011 /* now wake up as many waiters as are expected to lock */
2012 while (count > 0 && AvFILLp (av) > 0)
2013 {
2014 SV *cb;
2015
2016 /* swap first two elements so we can shift a waiter */
2017 AvARRAY (av)[0] = AvARRAY (av)[1];
2018 AvARRAY (av)[1] = count_sv;
2019 cb = av_shift (av);
2020
2021 if (SvOBJECT (cb))
2022 api_ready (aTHX_ cb);
2023 else
2024 croak ("callbacks not yet supported");
2025
2026 SvREFCNT_dec (cb);
2027
2028 --count;
2029 }
2030}
2031
2032static void
2033coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2034{
2035 /* call $sem->adjust (0) to possibly wake up some other waiters */
2036 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2037}
2038
2039static int
2040slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2041{
2042 AV *av = (AV *)frame->data;
2043 SV *count_sv = AvARRAY (av)[0];
2044
2045 /* if we are about to throw, don't actually acquire the lock, just throw */
2046 if (coro_throw && 0)//D
2047 return 0;
2048 else if (SvIVX (count_sv) > 0)
2049 {
2050 SvSTATE_current->on_destroy = 0;
2051 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2052 return 0;
2053 }
2054 else
2055 {
2056 int i;
2057 /* if we were woken up but can't down, we look through the whole */
2058 /* waiters list and only add us if we aren't in there already */
2059 /* this avoids some degenerate memory usage cases */
2060
2061 for (i = 1; i <= AvFILLp (av); ++i)
2062 if (AvARRAY (av)[i] == SvRV (coro_current))
2063 return 1;
2064
2065 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2066 return 1;
2067 }
2068}
2069
2070static void
2071slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2072{
2073 AV *av = (AV *)SvRV (arg [0]);
2074
2075 if (SvIVX (AvARRAY (av)[0]) > 0)
2076 {
2077 frame->data = (void *)av;
2078 frame->prepare = prepare_nop;
2079 }
2080 else
2081 {
2082 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2083
2084 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2085 frame->prepare = prepare_schedule;
2086
2087 /* to avoid race conditions when a woken-up coro gets terminated */
2088 /* we arrange for a temporary on_destroy that calls adjust (0) */
2089 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2090 }
2091
2092 frame->check = slf_check_semaphore_down;
2093
2094}
2095
2096/*****************************************************************************/
2097/* gensub: simple closure generation utility */
2098
2099#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2100
2101/* create a closure from XS, returns a code reference */
2102/* the arg can be accessed via GENSUB_ARG from the callback */
2103/* the callback must use dXSARGS/XSRETURN */
2104static SV *
2105gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2106{
2107 CV *cv = (CV *)newSV (0);
2108
2109 sv_upgrade ((SV *)cv, SVt_PVCV);
2110
2111 CvANON_on (cv);
2112 CvISXSUB_on (cv);
2113 CvXSUB (cv) = xsub;
2114 GENSUB_ARG = arg;
2115
2116 return newRV_noinc ((SV *)cv);
2117}
2118
2119/*****************************************************************************/
2120/* Coro::AIO */
2121
2122#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2123
2124/* helper storage struct */
2125struct io_state
2126{
2127 int errorno;
2128 I32 laststype; /* U16 in 5.10.0 */
2129 int laststatval;
2130 Stat_t statcache;
2131};
2132
2133static void
2134coro_aio_callback (pTHX_ CV *cv)
2135{
2136 dXSARGS;
2137 AV *state = (AV *)GENSUB_ARG;
2138 SV *coro = av_pop (state);
2139 SV *data_sv = newSV (sizeof (struct io_state));
2140
2141 av_extend (state, items);
2142
2143 sv_upgrade (data_sv, SVt_PV);
2144 SvCUR_set (data_sv, sizeof (struct io_state));
2145 SvPOK_only (data_sv);
2146
2147 {
2148 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2149
2150 data->errorno = errno;
2151 data->laststype = PL_laststype;
2152 data->laststatval = PL_laststatval;
2153 data->statcache = PL_statcache;
2154 }
2155
2156 /* now build the result vector out of all the parameters and the data_sv */
2157 {
2158 int i;
2159
2160 for (i = 0; i < items; ++i)
2161 av_push (state, SvREFCNT_inc_NN (ST (i)));
2162 }
2163
2164 av_push (state, data_sv);
2165
2166 api_ready (aTHX_ coro);
2167 SvREFCNT_dec (coro);
2168 SvREFCNT_dec ((AV *)state);
2169}
2170
2171static int
2172slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2173{
2174 AV *state = (AV *)frame->data;
2175
2176 /* one element that is an RV? repeat! */
2177 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2178 return 1;
2179
2180 /* restore status */
2181 {
2182 SV *data_sv = av_pop (state);
2183 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2184
2185 errno = data->errorno;
2186 PL_laststype = data->laststype;
2187 PL_laststatval = data->laststatval;
2188 PL_statcache = data->statcache;
2189
2190 SvREFCNT_dec (data_sv);
2191 }
2192
2193 /* push result values */
2194 {
2195 dSP;
2196 int i;
2197
2198 EXTEND (SP, AvFILLp (state) + 1);
2199 for (i = 0; i <= AvFILLp (state); ++i)
2200 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2201
2202 PUTBACK;
2203 }
825 2204
826 return 0; 2205 return 0;
827} 2206}
828 2207
829static void 2208static void
830api_ready (SV *coro) 2209slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
831{ 2210{
832 coro_enq (SvREFCNT_inc (coro)); 2211 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
833} 2212 SV *coro_hv = SvRV (coro_current);
2213 struct coro *coro = SvSTATE_hv (coro_hv);
834 2214
835static void 2215 /* put our coroutine id on the state arg */
836api_schedule (int cede) 2216 av_push (state, SvREFCNT_inc_NN (coro_hv));
837{
838 SV *prev, *next;
839 2217
840 prev = GvSV (coro_current); 2218 /* first see whether we have a non-zero priority and set it as AIO prio */
2219 if (coro->prio)
2220 {
2221 dSP;
841 2222
842 if (cede) 2223 static SV *prio_cv;
843 coro_enq (SvREFCNT_inc (prev)); 2224 static SV *prio_sv;
844 2225
845 next = coro_deq (PRIO_MIN); 2226 if (expect_false (!prio_cv))
2227 {
2228 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2229 prio_sv = newSViv (0);
2230 }
846 2231
847 if (!next) 2232 PUSHMARK (SP);
848 next = SvREFCNT_inc (GvSV (coro_idle)); 2233 sv_setiv (prio_sv, coro->prio);
2234 XPUSHs (prio_sv);
849 2235
850 GvSV (coro_current) = SvREFCNT_inc (next); 2236 PUTBACK;
851 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 2237 call_sv (prio_cv, G_VOID | G_DISCARD);
852 sv_to_coro (next, "Coro::schedule", "next coroutine"), 2238 }
853 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
854 SvREFCNT_dec (next);
855 SvREFCNT_dec (prev);
856}
857 2239
2240 /* now call the original request */
2241 {
2242 dSP;
2243 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2244 int i;
2245
2246 PUSHMARK (SP);
2247
2248 /* first push all args to the stack */
2249 EXTEND (SP, items + 1);
2250
2251 for (i = 0; i < items; ++i)
2252 PUSHs (arg [i]);
2253
2254 /* now push the callback closure */
2255 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2256
2257 /* now call the AIO function - we assume our request is uncancelable */
2258 PUTBACK;
2259 call_sv ((SV *)req, G_VOID | G_DISCARD);
2260 }
2261
2262 /* now that the requets is going, we loop toll we have a result */
2263 frame->data = (void *)state;
2264 frame->prepare = prepare_schedule;
2265 frame->check = slf_check_aio_req;
2266}
2267
2268static void
2269coro_aio_req_xs (pTHX_ CV *cv)
2270{
2271 dXSARGS;
2272
2273 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2274
2275 XSRETURN_EMPTY;
2276}
2277
2278/*****************************************************************************/
2279
858MODULE = Coro::State PACKAGE = Coro::State 2280MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
859 2281
860PROTOTYPES: ENABLE 2282PROTOTYPES: DISABLE
861 2283
862BOOT: 2284BOOT:
863{ /* {} necessary for stoopid perl-5.6.x */ 2285{
864 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2286#ifdef USE_ITHREADS
865 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2287# if CORO_PTHREAD
2288 coro_thx = PERL_GET_CONTEXT;
2289# endif
2290#endif
2291 BOOT_PAGESIZE;
2292
2293 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2294 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2295
2296 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2297 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2298 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2299
2300 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2301 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2302 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2303
866 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2304 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
867 2305
868 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2306 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
869 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2307 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
870 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2308 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
871 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2309 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
872
873 if (!padlist_cache)
874 padlist_cache = newHV ();
875 2310
876 main_mainstack = PL_mainstack; 2311 main_mainstack = PL_mainstack;
2312 main_top_env = PL_top_env;
2313
2314 while (main_top_env->je_prev)
2315 main_top_env = main_top_env->je_prev;
877 2316
878 { 2317 {
879 SV *sv = perl_get_sv("Coro::API", 1); 2318 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
880 2319
881 coroapi.ver = CORO_API_VERSION - 1; 2320 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
882 coroapi.transfer = api_transfer; 2321 hv_store_ent (PL_custom_op_names, slf,
883 coroapi.schedule = api_schedule; 2322 newSVpv ("coro_slf", 0), 0);
884 coroapi.ready = api_ready;
885 coroapi.nready = &coro_nready;
886 2323
887 GCoroAPI = &coroapi; 2324 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
888 sv_setiv(sv, (IV)&coroapi); 2325 hv_store_ent (PL_custom_op_descs, slf,
889 SvREADONLY_on(sv); 2326 newSVpv ("coro schedule like function", 0), 0);
890 } 2327 }
891}
892 2328
893Coro::State 2329 coroapi.ver = CORO_API_VERSION;
894_newprocess(args) 2330 coroapi.rev = CORO_API_REVISION;
895 SV * args 2331
896 PROTOTYPE: $ 2332 coroapi.transfer = api_transfer;
2333
2334 coroapi.sv_state = SvSTATE_;
2335 coroapi.execute_slf = api_execute_slf;
2336 coroapi.prepare_nop = prepare_nop;
2337 coroapi.prepare_schedule = prepare_schedule;
2338 coroapi.prepare_cede = prepare_cede;
2339 coroapi.prepare_cede_notself = prepare_cede_notself;
2340
2341 {
2342 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2343
2344 if (!svp) croak ("Time::HiRes is required");
2345 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2346
2347 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2348 }
2349
2350 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2351}
2352
2353SV *
2354new (char *klass, ...)
897 CODE: 2355 CODE:
898 Coro__State coro; 2356{
2357 struct coro *coro;
2358 MAGIC *mg;
2359 HV *hv;
2360 int i;
899 2361
900 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
901 croak ("Coro::State::_newprocess expects an arrayref");
902
903 New (0, coro, 1, struct coro); 2362 Newz (0, coro, 1, struct coro);
2363 coro->args = newAV ();
2364 coro->flags = CF_NEW;
904 2365
905 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2366 if (coro_first) coro_first->prev = coro;
906 coro->mainstack = 0; /* actual work is done inside transfer */ 2367 coro->next = coro_first;
907 coro->stack = 0; 2368 coro_first = coro;
908 2369
909 RETVAL = coro; 2370 coro->hv = hv = newHV ();
2371 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2372 mg->mg_flags |= MGf_DUP;
2373 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2374
2375 av_extend (coro->args, items - 1);
2376 for (i = 1; i < items; i++)
2377 av_push (coro->args, newSVsv (ST (i)));
2378}
910 OUTPUT: 2379 OUTPUT:
911 RETVAL 2380 RETVAL
912 2381
913void 2382void
914transfer(prev, next, flags) 2383transfer (...)
915 Coro::State_or_hashref prev
916 Coro::State_or_hashref next
917 int flags
918 PROTOTYPE: @ 2384 PROTOTYPE: $$
919 CODE: 2385 CODE:
920 PUTBACK; 2386 CORO_EXECUTE_SLF_XS (slf_init_transfer);
921 transfer (aTHX_ prev, next, flags); 2387
922 SPAGAIN; 2388bool
2389_destroy (SV *coro_sv)
2390 CODE:
2391 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2392 OUTPUT:
2393 RETVAL
923 2394
924void 2395void
925DESTROY(coro) 2396_exit (int code)
926 Coro::State coro 2397 PROTOTYPE: $
927 CODE: 2398 CODE:
2399 _exit (code);
928 2400
929 if (coro->mainstack && coro->mainstack != main_mainstack) 2401int
2402cctx_stacksize (int new_stacksize = 0)
2403 PROTOTYPE: ;$
2404 CODE:
2405 RETVAL = cctx_stacksize;
2406 if (new_stacksize)
2407 {
2408 cctx_stacksize = new_stacksize;
2409 ++cctx_gen;
2410 }
2411 OUTPUT:
2412 RETVAL
2413
2414int
2415cctx_max_idle (int max_idle = 0)
2416 PROTOTYPE: ;$
2417 CODE:
2418 RETVAL = cctx_max_idle;
2419 if (max_idle > 1)
2420 cctx_max_idle = max_idle;
2421 OUTPUT:
2422 RETVAL
2423
2424int
2425cctx_count ()
2426 PROTOTYPE:
2427 CODE:
2428 RETVAL = cctx_count;
2429 OUTPUT:
2430 RETVAL
2431
2432int
2433cctx_idle ()
2434 PROTOTYPE:
2435 CODE:
2436 RETVAL = cctx_idle;
2437 OUTPUT:
2438 RETVAL
2439
2440void
2441list ()
2442 PROTOTYPE:
2443 PPCODE:
2444{
2445 struct coro *coro;
2446 for (coro = coro_first; coro; coro = coro->next)
2447 if (coro->hv)
2448 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2449}
2450
2451void
2452call (Coro::State coro, SV *coderef)
2453 ALIAS:
2454 eval = 1
2455 CODE:
2456{
2457 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
930 { 2458 {
931 struct coro temp; 2459 struct coro temp;
932 2460
933 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2461 if (!(coro->flags & CF_RUNNING))
934 LOAD(aTHX_ coro); 2462 {
2463 PUTBACK;
2464 save_perl (aTHX_ &temp);
2465 load_perl (aTHX_ coro);
2466 }
935 2467
936 destroy_stacks (aTHX); 2468 {
2469 dSP;
2470 ENTER;
2471 SAVETMPS;
2472 PUTBACK;
2473 PUSHSTACK;
2474 PUSHMARK (SP);
937 2475
938 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2476 if (ix)
2477 eval_sv (coderef, 0);
2478 else
2479 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
939 2480
940 coro->mainstack = 0; 2481 POPSTACK;
2482 SPAGAIN;
2483 FREETMPS;
2484 LEAVE;
2485 PUTBACK;
2486 }
2487
2488 if (!(coro->flags & CF_RUNNING))
2489 {
2490 save_perl (aTHX_ coro);
2491 load_perl (aTHX_ &temp);
2492 SPAGAIN;
2493 }
941 } 2494 }
2495}
942 2496
943 deallocate_stack (coro); 2497SV *
944 2498is_ready (Coro::State coro)
945 Safefree (coro); 2499 PROTOTYPE: $
2500 ALIAS:
2501 is_ready = CF_READY
2502 is_running = CF_RUNNING
2503 is_new = CF_NEW
2504 is_destroyed = CF_DESTROYED
2505 CODE:
2506 RETVAL = boolSV (coro->flags & ix);
2507 OUTPUT:
2508 RETVAL
946 2509
947void 2510void
948flush() 2511throw (Coro::State self, SV *throw = &PL_sv_undef)
949 CODE: 2512 PROTOTYPE: $;$
950#ifdef MAY_FLUSH 2513 CODE:
951 flush_padlist_cache (); 2514{
952#endif 2515 struct coro *current = SvSTATE_current;
2516 SV **throwp = self == current ? &coro_throw : &self->throw;
2517 SvREFCNT_dec (*throwp);
2518 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2519}
953 2520
954void 2521void
955_exit(code) 2522api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
956 int code 2523 PROTOTYPE: $;$
2524 C_ARGS: aTHX_ coro, flags
2525
2526SV *
2527has_cctx (Coro::State coro)
957 PROTOTYPE: $ 2528 PROTOTYPE: $
958 CODE: 2529 CODE:
959#if defined(__GLIBC__) || _POSIX_C_SOURCE 2530 RETVAL = boolSV (!!coro->cctx);
960 _exit (code); 2531 OUTPUT:
961#else 2532 RETVAL
962 signal (SIGTERM, SIG_DFL);
963 raise (SIGTERM);
964 exit (code);
965#endif
966 2533
967MODULE = Coro::State PACKAGE = Coro::Cont 2534int
2535is_traced (Coro::State coro)
2536 PROTOTYPE: $
2537 CODE:
2538 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2539 OUTPUT:
2540 RETVAL
968 2541
969# this is slightly dirty (should expose a c-level api) 2542UV
2543rss (Coro::State coro)
2544 PROTOTYPE: $
2545 ALIAS:
2546 usecount = 1
2547 CODE:
2548 switch (ix)
2549 {
2550 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2551 case 1: RETVAL = coro->usecount; break;
2552 }
2553 OUTPUT:
2554 RETVAL
970 2555
971void 2556void
972yield(...) 2557force_cctx ()
2558 PROTOTYPE:
2559 CODE:
2560 SvSTATE_current->cctx->idle_sp = 0;
2561
2562void
2563swap_defsv (Coro::State self)
973 PROTOTYPE: @ 2564 PROTOTYPE: $
2565 ALIAS:
2566 swap_defav = 1
974 CODE: 2567 CODE:
975 static SV *returnstk; 2568 if (!self->slot)
976 SV *sv; 2569 croak ("cannot swap state with coroutine that has no saved state,");
977 AV *defav = GvAV (PL_defgv); 2570 else
978 struct coro *prev, *next; 2571 {
2572 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2573 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
979 2574
980 if (!returnstk) 2575 SV *tmp = *src; *src = *dst; *dst = tmp;
981 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2576 }
982 2577
983 /* set up @_ -- ugly */
984 av_clear (defav);
985 av_fill (defav, items - 1);
986 while (items--)
987 av_store (defav, items, SvREFCNT_inc (ST(items)));
988
989 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
990 sv = av_pop ((AV *)SvRV (returnstk));
991 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
992 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
993 SvREFCNT_dec (sv);
994
995 transfer(aTHX_ prev, next, 0);
996 2578
997MODULE = Coro::State PACKAGE = Coro 2579MODULE = Coro::State PACKAGE = Coro
998 2580
999# this is slightly dirty (should expose a c-level api)
1000
1001BOOT: 2581BOOT:
1002{ 2582{
1003 int i; 2583 int i;
2584
2585 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2586 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2587 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2588
2589 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2590 SvREADONLY_on (coro_current);
2591
1004 HV *stash = gv_stashpv ("Coro", TRUE); 2592 coro_stash = gv_stashpv ("Coro", TRUE);
1005 2593
1006 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2594 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1007 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2595 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1008 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2596 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1009 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2597 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1010 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2598 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1011 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2599 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1012
1013 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1014 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1015 2600
1016 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2601 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1017 coro_ready[i] = newAV (); 2602 coro_ready[i] = newAV ();
2603
2604 {
2605 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2606
2607 coroapi.schedule = api_schedule;
2608 coroapi.cede = api_cede;
2609 coroapi.cede_notself = api_cede_notself;
2610 coroapi.ready = api_ready;
2611 coroapi.is_ready = api_is_ready;
2612 coroapi.nready = coro_nready;
2613 coroapi.current = coro_current;
2614
2615 GCoroAPI = &coroapi;
2616 sv_setiv (sv, (IV)&coroapi);
2617 SvREADONLY_on (sv);
2618 }
1018} 2619}
1019 2620
1020void 2621void
1021ready(self) 2622schedule (...)
1022 SV * self
1023 CODE: 2623 CODE:
1024 api_ready (self); 2624 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2625
2626void
2627cede (...)
2628 CODE:
2629 CORO_EXECUTE_SLF_XS (slf_init_cede);
2630
2631void
2632cede_notself (...)
2633 CODE:
2634 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2635
2636void
2637_set_current (SV *current)
2638 PROTOTYPE: $
2639 CODE:
2640 SvREFCNT_dec (SvRV (coro_current));
2641 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2642
2643void
2644_set_readyhook (SV *hook)
2645 PROTOTYPE: $
2646 CODE:
2647 SvREFCNT_dec (coro_readyhook);
2648 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1025 2649
1026int 2650int
2651prio (Coro::State coro, int newprio = 0)
2652 PROTOTYPE: $;$
2653 ALIAS:
2654 nice = 1
2655 CODE:
2656{
2657 RETVAL = coro->prio;
2658
2659 if (items > 1)
2660 {
2661 if (ix)
2662 newprio = coro->prio - newprio;
2663
2664 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2665 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2666
2667 coro->prio = newprio;
2668 }
2669}
2670 OUTPUT:
2671 RETVAL
2672
2673SV *
2674ready (SV *self)
2675 PROTOTYPE: $
2676 CODE:
2677 RETVAL = boolSV (api_ready (aTHX_ self));
2678 OUTPUT:
2679 RETVAL
2680
2681int
1027nready(...) 2682nready (...)
1028 PROTOTYPE: 2683 PROTOTYPE:
1029 CODE: 2684 CODE:
1030 RETVAL = coro_nready; 2685 RETVAL = coro_nready;
1031 OUTPUT: 2686 OUTPUT:
1032 RETVAL 2687 RETVAL
1033 2688
2689# for async_pool speedup
1034void 2690void
1035schedule(...) 2691_pool_1 (SV *cb)
1036 PROTOTYPE:
1037 ALIAS:
1038 cede = 1
1039 CODE: 2692 CODE:
1040 api_schedule (ix); 2693{
2694 HV *hv = (HV *)SvRV (coro_current);
2695 struct coro *coro = SvSTATE_hv ((SV *)hv);
2696 AV *defav = GvAV (PL_defgv);
2697 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2698 AV *invoke_av;
2699 int i, len;
1041 2700
2701 if (!invoke)
2702 {
2703 SV *old = PL_diehook;
2704 PL_diehook = 0;
2705 SvREFCNT_dec (old);
2706 croak ("\3async_pool terminate\2\n");
2707 }
2708
2709 SvREFCNT_dec (coro->saved_deffh);
2710 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2711
2712 hv_store (hv, "desc", sizeof ("desc") - 1,
2713 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2714
2715 invoke_av = (AV *)SvRV (invoke);
2716 len = av_len (invoke_av);
2717
2718 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2719
2720 if (len > 0)
2721 {
2722 av_fill (defav, len - 1);
2723 for (i = 0; i < len; ++i)
2724 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2725 }
2726}
2727
2728void
2729_pool_2 (SV *cb)
2730 CODE:
2731{
2732 HV *hv = (HV *)SvRV (coro_current);
2733 struct coro *coro = SvSTATE_hv ((SV *)hv);
2734
2735 sv_setsv (cb, &PL_sv_undef);
2736
2737 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2738 coro->saved_deffh = 0;
2739
2740 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2741 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2742 {
2743 SV *old = PL_diehook;
2744 PL_diehook = 0;
2745 SvREFCNT_dec (old);
2746 croak ("\3async_pool terminate\2\n");
2747 }
2748
2749 av_clear (GvAV (PL_defgv));
2750 hv_store (hv, "desc", sizeof ("desc") - 1,
2751 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2752
2753 coro->prio = 0;
2754
2755 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2756 api_trace (aTHX_ coro_current, 0);
2757
2758 av_push (av_async_pool, newSVsv (coro_current));
2759}
2760
2761
2762MODULE = Coro::State PACKAGE = PerlIO::cede
2763
2764BOOT:
2765 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2766
2767
2768MODULE = Coro::State PACKAGE = Coro::Semaphore
2769
2770SV *
2771new (SV *klass, SV *count_ = 0)
2772 CODE:
2773{
2774 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2775 AV *av = newAV ();
2776 SV **ary;
2777
2778 /* unfortunately, building manually saves memory */
2779 Newx (ary, 2, SV *);
2780 AvALLOC (av) = ary;
2781 AvARRAY (av) = ary;
2782 AvMAX (av) = 1;
2783 AvFILLp (av) = 0;
2784 ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
2785
2786 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
2787}
2788 OUTPUT:
2789 RETVAL
2790
2791SV *
2792count (SV *self)
2793 CODE:
2794 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2795 OUTPUT:
2796 RETVAL
2797
2798void
2799up (SV *self, int adjust = 1)
2800 ALIAS:
2801 adjust = 1
2802 CODE:
2803 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2804
2805void
2806down (SV *self)
2807 CODE:
2808 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2809
2810void
2811try (SV *self)
2812 PPCODE:
2813{
2814 AV *av = (AV *)SvRV (self);
2815 SV *count_sv = AvARRAY (av)[0];
2816 IV count = SvIVX (count_sv);
2817
2818 if (count > 0)
2819 {
2820 --count;
2821 SvIVX (count_sv) = count;
2822 XSRETURN_YES;
2823 }
2824 else
2825 XSRETURN_NO;
2826}
2827
2828void
2829waiters (SV *self)
2830 CODE:
2831{
2832 AV *av = (AV *)SvRV (self);
2833
2834 if (GIMME_V == G_SCALAR)
2835 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2836 else
2837 {
2838 int i;
2839 EXTEND (SP, AvFILLp (av) + 1 - 1);
2840 for (i = 1; i <= AvFILLp (av); ++i)
2841 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2842 }
2843}
2844
2845
2846MODULE = Coro::State PACKAGE = Coro::AnyEvent
2847
2848BOOT:
2849 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2850
2851void
2852_schedule (...)
2853 CODE:
2854{
2855 static int incede;
2856
2857 api_cede_notself (aTHX);
2858
2859 ++incede;
2860 while (coro_nready >= incede && api_cede (aTHX))
2861 ;
2862
2863 sv_setsv (sv_activity, &PL_sv_undef);
2864 if (coro_nready >= incede)
2865 {
2866 PUSHMARK (SP);
2867 PUTBACK;
2868 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2869 }
2870
2871 --incede;
2872}
2873
2874
2875MODULE = Coro::State PACKAGE = Coro::AIO
2876
2877void
2878_register (char *target, char *proto, SV *req)
2879 CODE:
2880{
2881 HV *st;
2882 GV *gvp;
2883 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2884 /* newXSproto doesn't return the CV on 5.8 */
2885 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2886 sv_setpv ((SV *)slf_cv, proto);
2887 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2888}
2889

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines