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 1.302 by root, Wed Nov 19 04:48:24 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
6 12
7#include <signal.h> 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
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"
150#define GCoroAPI (&coroapi) /* very sneaky */
34 151
152#ifdef USE_ITHREADS
153# if CORO_PTHREAD
154static void *coro_thx;
155# endif
156#endif
157
158static double (*nvtime)(); /* so why doesn't it take void? */
159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 171
37/* this is actually not only the c stack but also c registers etc... */ 172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
186static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle;
188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
198/* this is a structure representing a c-level coroutine */
38typedef struct { 199typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 200{
40 int usecnt; /* shared by how many coroutines */ 201 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 202
203 /* the stack */
204 void *sptr;
205 size_t ssize;
206
207 /* cpu state */
208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
210 JMPENV *top_env;
43 coro_context cctx; 211 coro_context cctx;
44 212
45 void *sptr; 213 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 214#if CORO_USE_VALGRIND
47} coro_stack; 215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
48 219
220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct
229{
230 SV *defsv;
231 AV *defav;
232 SV *errsv;
233 SV *irsgv;
234#define VAR(name,type) type name;
235# include "state.h"
236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
240
241/* this is a structure representing a perl-level coroutine */
49struct coro { 242struct coro {
50 /* the optional C context */ 243 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 244 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 245
55 /* optionally saved, might be zero */ 246 /* state data */
56 AV *defav; 247 struct CoroSLF slf_frame; /* saved slf frame */
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63
64 /* the stacks and related info (callchain etc..) */
65 PERL_SI *curstackinfo;
66 AV *curstack;
67 AV *mainstack; 248 AV *mainstack;
68 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 250
92 /* data associated with this coroutine (initial args) */ 251 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 252 int refcnt; /* coroutines are refcounted, yes */
253 int flags; /* CF_ flags */
254 HV *hv; /* the perl hash associated with this coro, if any */
255 void (*on_destroy)(pTHX_ struct coro *coro);
256
257 /* statistics */
258 int usecount; /* number of transfers to this coro */
259
260 /* coro process data */
261 int prio;
262 SV *except; /* exception to be thrown */
263 SV *rouse_cb;
264
265 /* async_pool */
266 SV *saved_deffh;
267
268 /* linked list */
269 struct coro *next, *prev;
94}; 270};
95 271
96typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
98 274
99static AV *main_mainstack; /* used to differentiate between $main and others */ 275/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 276/* and get copied between struct coro and these variables */
101static SV *ucoro_state_sv; 277/* the mainr easonw e don't support windows process emulation */
102static U32 ucoro_state_hash; 278static struct CoroSLF slf_frame; /* the current slf frame */
103static HV *padlist_cache;
104
105/* mostly copied from op.c:cv_clone2 */
106STATIC AV *
107clone_padlist (AV *protopadlist)
108{
109 AV *av;
110 I32 ix;
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113 SV **pname = AvARRAY (protopad_name);
114 SV **ppad = AvARRAY (protopad);
115 I32 fname = AvFILLp (protopad_name);
116 I32 fpad = AvFILLp (protopad);
117 AV *newpadlist, *newpad_name, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127
128 newpadlist = newAV ();
129 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name);
131 av_store (newpadlist, 1, (SV *) newpad);
132
133 av = newAV (); /* will be @_ */
134 av_extend (av, 0);
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137
138 for (ix = fpad; ix > 0; ix--)
139 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
141 if (namesv && namesv != &PL_sv_undef)
142 {
143 char *name = SvPVX (namesv); /* XXX */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
145 { /* lexical from outside? */
146 npad[ix] = SvREFCNT_inc (ppad[ix]);
147 }
148 else
149 { /* our own lexical */
150 SV *sv;
151 if (*name == '&')
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175
176#if 0 /* return -ENOTUNDERSTOOD */
177 /* Now that vars are all in place, clone nested closures. */
178
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC AV *
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316
317 {
318 dSP;
319 CV *cv;
320
321 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs))
323 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist;
330#ifdef USE_THREADS
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 }
337
338 PUTBACK;
339 }
340}
341
342static void
343save_state(pTHX_ Coro__State c, int flags)
344{
345 {
346 dSP;
347 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo;
350
351 /*
352 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :(
354 */
355
356 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */
358 for (;;)
359 {
360 do
361 {
362 PERL_CONTEXT *cx = &ccstk[cxix--];
363
364 if (CxTYPE(cx) == CXt_SUB)
365 {
366 CV *cv = cx->blk_sub.cv;
367 if (CvDEPTH(cv))
368 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv));
384 PUSHs ((SV *)cv);
385
386 get_padlist (cv); /* this is a monster */
387 }
388 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 }
396 while (cxix >= 0);
397
398 if (top_si->si_type == PERLSI_MAIN)
399 break;
400
401 top_si = top_si->si_prev;
402 ccstk = top_si->si_cxstack;
403 cxix = top_si->si_cxix;
404 }
405
406 PUTBACK;
407 }
408
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412
413 /* I have not the slightest idea of why av_reify is necessary */
414 /* but if it's missing the defav contents magically get replaced sometimes */
415 if (c->defav)
416 av_reify (c->defav);
417
418 c->dowarn = PL_dowarn;
419 c->in_eval = PL_in_eval;
420
421 c->curstackinfo = PL_curstackinfo;
422 c->curstack = PL_curstack;
423 c->mainstack = PL_mainstack;
424 c->stack_sp = PL_stack_sp;
425 c->op = PL_op;
426 c->curpad = PL_curpad;
427 c->stack_base = PL_stack_base;
428 c->stack_max = PL_stack_max;
429 c->tmps_stack = PL_tmps_stack;
430 c->tmps_floor = PL_tmps_floor;
431 c->tmps_ix = PL_tmps_ix;
432 c->tmps_max = PL_tmps_max;
433 c->markstack = PL_markstack;
434 c->markstack_ptr = PL_markstack_ptr;
435 c->markstack_max = PL_markstack_max;
436 c->scopestack = PL_scopestack;
437 c->scopestack_ix = PL_scopestack_ix;
438 c->scopestack_max = PL_scopestack_max;
439 c->savestack = PL_savestack;
440 c->savestack_ix = PL_savestack_ix;
441 c->savestack_max = PL_savestack_max;
442 c->retstack = PL_retstack;
443 c->retstack_ix = PL_retstack_ix;
444 c->retstack_max = PL_retstack_max;
445 c->curcop = PL_curcop;
446 c->top_env = PL_top_env;
447}
448
449/*
450 * allocate various perl stacks. This is an exact copy
451 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need
453 * a lot of stackspace.
454 */
455STATIC void
456coro_init_stacks (pTHX)
457{
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
459 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462
463 PL_stack_base = AvARRAY(PL_curstack);
464 PL_stack_sp = PL_stack_base;
465 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466
467 New(50,PL_tmps_stack,96,SV*);
468 PL_tmps_floor = -1;
469 PL_tmps_ix = -1;
470 PL_tmps_max = 96;
471
472 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16;
475
476 SET_MARK_OFFSET;
477
478 New(54,PL_scopestack,16,I32);
479 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16;
481
482 New(54,PL_savestack,96,ANY);
483 PL_savestack_ix = 0;
484 PL_savestack_max = 96;
485
486 New(54,PL_retstack,8,OP*);
487 PL_retstack_ix = 0;
488 PL_retstack_max = 8;
489}
490
491/*
492 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */
495STATIC void
496destroy_stacks(pTHX)
497{
498 /* is this ugly, I ask? */
499 while (PL_scopestack_ix)
500 LEAVE;
501
502 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS;
505
506 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next;
508
509 while (PL_curstackinfo)
510 {
511 PERL_SI *p = PL_curstackinfo->si_prev;
512
513 {
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
520 dounwind(-1);
521
522 SvREFCNT_dec(PL_curstackinfo->si_stack);
523 Safefree(PL_curstackinfo->si_cxstack);
524 Safefree(PL_curstackinfo);
525 PL_curstackinfo = p;
526 }
527
528 Safefree(PL_tmps_stack);
529 Safefree(PL_markstack);
530 Safefree(PL_scopestack);
531 Safefree(PL_savestack);
532 Safefree(PL_retstack);
533}
534
535static void
536allocate_stack (Coro__State ctx, int alloc)
537{
538 coro_stack *stack;
539
540 New (0, stack, 1, coro_stack);
541
542 stack->refcnt = 1;
543 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0;
545 if (alloc)
546 {
547#ifdef HAVE_MMAP
548 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
550 if (stack->sptr == (void *)-1)
551#endif
552 {
553 /*FIXME*//*D*//* reasonable stack size! */
554 stack->ssize = -4096 * sizeof (long);
555 New (0, stack->sptr, 4096, long);
556 }
557 }
558 else
559 stack->sptr = 0;
560
561 ctx->stack = stack;
562}
563
564static void
565deallocate_stack (Coro__State ctx)
566{
567 coro_stack *stack = ctx->stack;
568
569 ctx->stack = 0;
570
571 if (stack)
572 {
573 if (!--stack->refcnt)
574 {
575#ifdef HAVE_MMAP
576 if (stack->ssize > 0 && stack->sptr)
577 munmap (stack->sptr, stack->ssize);
578 else
579#else
580 Safefree (stack->sptr);
581#endif
582 Safefree (stack);
583 }
584 else if (ctx->gencnt == stack->gencnt)
585 --stack->usecnt;
586 }
587}
588
589static void
590setup_coro (void *arg)
591{
592 /*
593 * emulate part of the perl startup here.
594 */
595 dSP;
596 Coro__State ctx = (Coro__State)arg;
597 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
598
599 coro_init_stacks (aTHX);
600 /*PL_curcop = 0;*/
601 /*PL_in_eval = PL_in_eval;*/ /* inherit */
602 SvREFCNT_dec (GvAV (PL_defgv));
603 GvAV (PL_defgv) = ctx->args;
604
605 SPAGAIN;
606
607 if (ctx->stack)
608 {
609 ctx->cursp = 0;
610
611 PUSHMARK(SP);
612 PUTBACK;
613 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
614
615 if (SvTRUE (ERRSV))
616 croak (NULL);
617 else
618 croak ("FATAL: CCTXT coroutine returned!");
619 }
620 else
621 {
622 UNOP myop;
623
624 PL_op = (OP *)&myop;
625
626 Zero(&myop, 1, UNOP);
627 myop.op_next = Nullop;
628 myop.op_flags = OPf_WANT_VOID;
629
630 PUSHMARK(SP);
631 XPUSHs (sub_init);
632 /*
633 * the next line is slightly wrong, as PL_op->op_next
634 * is actually being executed so we skip the first op.
635 * that doesn't matter, though, since it is only
636 * pp_nextstate and we never return...
637 * ah yes, and I don't care anyways ;)
638 */
639 PUTBACK;
640 PL_op = pp_entersub();
641 SPAGAIN;
642
643 ENTER; /* necessary e.g. for dounwind */
644 }
645}
646
647static void
648continue_coro (void *arg)
649{
650 /*
651 * this is a _very_ stripped down perl interpreter ;)
652 */
653 Coro__State ctx = (Coro__State)arg;
654
655 /*FIXME*//* must set up top_env here */
656 ctx->cursp = 0;
657 PL_op = PL_op->op_next;
658 CALLRUNOPS(aTHX);
659
660 abort ();
661}
662
663STATIC void
664transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
665{
666 dSP;
667 dSTACKLEVEL;
668
669 if (prev != next)
670 {
671 if (next->mainstack)
672 {
673 SAVE (prev, flags);
674 LOAD (next);
675
676 /* mark this state as in-use */
677 next->mainstack = 0;
678 next->tmps_ix = -2;
679
680 /* stacklevel changed? if yes, grab the stack for us! */
681 if (flags & TRANSFER_SAVE_CCTXT)
682 {
683 if (!prev->stack)
684 allocate_stack (prev, 0);
685 else if (prev->cursp != stacklevel
686 && prev->stack->usecnt > 1)
687 {
688 prev->gencnt = ++prev->stack->gencnt;
689 prev->stack->usecnt = 1;
690 }
691
692 /* has our stack been invalidated? */
693 if (next->stack && next->stack->gencnt != next->gencnt)
694 {
695 deallocate_stack (next);
696 allocate_stack (next, 1);
697 coro_create (&(next->stack->cctx),
698 continue_coro, (void *)next,
699 next->stack->sptr, labs (next->stack->ssize));
700 }
701
702 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703 }
704
705 }
706 else if (next->tmps_ix == -2)
707 croak ("tried to transfer to running coroutine");
708 else
709 {
710 SAVE (prev, -1); /* first get rid of the old state */
711
712 if (flags & TRANSFER_SAVE_CCTXT)
713 {
714 if (!prev->stack)
715 allocate_stack (prev, 0);
716
717 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718 {
719 setup_coro (next);
720
721 prev->stack->refcnt++;
722 prev->stack->usecnt++;
723 next->stack = prev->stack;
724 next->gencnt = prev->gencnt;
725 }
726 else
727 {
728 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx),
730 setup_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize));
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733 }
734 }
735 else
736 setup_coro (next);
737 }
738 }
739
740 next->cursp = stacklevel;
741}
742
743static struct coro *
744sv_to_coro (SV *arg, const char *funcname, const char *varname)
745{
746 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
747 {
748 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
749
750 if (!he)
751 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
752
753 arg = HeVAL(he);
754 }
755
756 /* must also be changed inside Coro::Cont::yield */
757 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758 return (struct coro *) SvIV((SV*)SvRV(arg));
759 else
760 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
761}
762
763static void
764api_transfer(pTHX_ SV *prev, SV *next, int flags)
765{
766 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),
767 sv_to_coro (next, "Coro::transfer", "next"),
768 flags);
769}
770 279
771/** Coro ********************************************************************/ 280/** Coro ********************************************************************/
772 281
773#define PRIO_MAX 3 282#define PRIO_MAX 3
774#define PRIO_HIGH 1 283#define PRIO_HIGH 1
… …
776#define PRIO_LOW -1 285#define PRIO_LOW -1
777#define PRIO_IDLE -3 286#define PRIO_IDLE -3
778#define PRIO_MIN -4 287#define PRIO_MIN -4
779 288
780/* for Coro.pm */ 289/* for Coro.pm */
781static GV *coro_current, *coro_idle; 290static SV *coro_current;
291static SV *coro_readyhook;
782static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
783static int coro_nready; 293static struct coro *coro_first;
294#define coro_nready coroapi.nready
784 295
785static void 296/** lowlevel stuff **********************************************************/
786coro_enq (SV *sv) 297
298static SV *
299coro_get_sv (pTHX_ const char *name, int create)
787{ 300{
788 if (SvROK (sv)) 301#if PERL_VERSION_ATLEAST (5,10,0)
302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
303 get_sv (name, create);
304#endif
305 return get_sv (name, create);
306}
307
308static AV *
309coro_get_av (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_av (name, create);
314#endif
315 return get_av (name, create);
316}
317
318static HV *
319coro_get_hv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_hv (name, create);
324#endif
325 return get_hv (name, create);
326}
327
328static AV *
329coro_clone_padlist (pTHX_ CV *cv)
330{
331 AV *padlist = CvPADLIST (cv);
332 AV *newpadlist, *newpad;
333
334 newpadlist = newAV ();
335 AvREAL_off (newpadlist);
336#if PERL_VERSION_ATLEAST (5,10,0)
337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
338#else
339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
340#endif
341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
342 --AvFILLp (padlist);
343
344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
345 av_store (newpadlist, 1, (SV *)newpad);
346
347 return newpadlist;
348}
349
350static void
351free_padlist (pTHX_ AV *padlist)
352{
353 /* may be during global destruction */
354 if (SvREFCNT (padlist))
789 { 355 {
790 SV *hv = SvRV (sv); 356 I32 i = AvFILLp (padlist);
791 if (SvTYPE (hv) == SVt_PVHV) 357 while (i >= 0)
792 { 358 {
793 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 359 SV **svp = av_fetch (padlist, i--, FALSE);
794 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 360 if (svp)
361 {
362 SV *sv;
363 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
364 SvREFCNT_dec (sv);
795 365
796 prio = prio > PRIO_MAX ? PRIO_MAX 366 SvREFCNT_dec (*svp);
797 : prio < PRIO_MIN ? PRIO_MIN 367 }
798 : prio;
799
800 av_push (coro_ready [prio - PRIO_MIN], sv);
801 coro_nready++;
802
803 return;
804 } 368 }
369
370 SvREFCNT_dec ((SV*)padlist);
371 }
372}
373
374static int
375coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
376{
377 AV *padlist;
378 AV *av = (AV *)mg->mg_obj;
379
380 /* casting is fun. */
381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
382 free_padlist (aTHX_ padlist);
383
384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
385
386 return 0;
387}
388
389#define CORO_MAGIC_type_cv 26
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
391
392static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0,
394 coro_cv_free
395};
396
397#define CORO_MAGIC_NN(sv, type) \
398 (expect_true (SvMAGIC (sv)->mg_type == type) \
399 ? SvMAGIC (sv) \
400 : mg_find (sv, type))
401
402#define CORO_MAGIC(sv, type) \
403 (expect_true (SvMAGIC (sv)) \
404 ? CORO_MAGIC_NN (sv, type) \
405 : 0)
406
407#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
408#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
409
410INLINE struct coro *
411SvSTATE_ (pTHX_ SV *coro)
412{
413 HV *stash;
414 MAGIC *mg;
415
416 if (SvROK (coro))
417 coro = SvRV (coro);
418
419 if (expect_false (SvTYPE (coro) != SVt_PVHV))
420 croak ("Coro::State object required");
421
422 stash = SvSTASH (coro);
423 if (expect_false (stash != coro_stash && stash != coro_state_stash))
424 {
425 /* very slow, but rare, check */
426 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
427 croak ("Coro::State object required");
428 }
429
430 mg = CORO_MAGIC_state (coro);
431 return (struct coro *)mg->mg_ptr;
432}
433
434#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
435
436/* faster than SvSTATE, but expects a coroutine hv */
437#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
438#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
439
440/* the next two functions merely cache the padlists */
441static void
442get_padlist (pTHX_ CV *cv)
443{
444 MAGIC *mg = CORO_MAGIC_cv (cv);
445 AV *av;
446
447 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
448 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
449 else
450 {
451#if CORO_PREFER_PERL_FUNCTIONS
452 /* this is probably cleaner? but also slower! */
453 /* in practise, it seems to be less stable */
454 CV *cp = Perl_cv_clone (cv);
455 CvPADLIST (cv) = CvPADLIST (cp);
456 CvPADLIST (cp) = 0;
457 SvREFCNT_dec (cp);
458#else
459 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
460#endif
805 } 461 }
806
807 croak ("Coro::ready tried to enqueue something that is not a coroutine");
808} 462}
809 463
464static void
465put_padlist (pTHX_ CV *cv)
466{
467 MAGIC *mg = CORO_MAGIC_cv (cv);
468 AV *av;
469
470 if (expect_false (!mg))
471 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
472
473 av = (AV *)mg->mg_obj;
474
475 if (expect_false (AvFILLp (av) >= AvMAX (av)))
476 av_extend (av, AvMAX (av) + 1);
477
478 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
479}
480
481/** load & save, init *******************************************************/
482
483static void
484load_perl (pTHX_ Coro__State c)
485{
486 perl_slots *slot = c->slot;
487 c->slot = 0;
488
489 PL_mainstack = c->mainstack;
490
491 GvSV (PL_defgv) = slot->defsv;
492 GvAV (PL_defgv) = slot->defav;
493 GvSV (PL_errgv) = slot->errsv;
494 GvSV (irsgv) = slot->irsgv;
495
496 #define VAR(name,type) PL_ ## name = slot->name;
497 # include "state.h"
498 #undef VAR
499
500 {
501 dSP;
502
503 CV *cv;
504
505 /* now do the ugly restore mess */
506 while (expect_true (cv = (CV *)POPs))
507 {
508 put_padlist (aTHX_ cv); /* mark this padlist as available */
509 CvDEPTH (cv) = PTR2IV (POPs);
510 CvPADLIST (cv) = (AV *)POPs;
511 }
512
513 PUTBACK;
514 }
515
516 slf_frame = c->slf_frame;
517 CORO_THROW = c->except;
518}
519
520static void
521save_perl (pTHX_ Coro__State c)
522{
523 c->except = CORO_THROW;
524 c->slf_frame = slf_frame;
525
526 {
527 dSP;
528 I32 cxix = cxstack_ix;
529 PERL_CONTEXT *ccstk = cxstack;
530 PERL_SI *top_si = PL_curstackinfo;
531
532 /*
533 * the worst thing you can imagine happens first - we have to save
534 * (and reinitialize) all cv's in the whole callchain :(
535 */
536
537 XPUSHs (Nullsv);
538 /* this loop was inspired by pp_caller */
539 for (;;)
540 {
541 while (expect_true (cxix >= 0))
542 {
543 PERL_CONTEXT *cx = &ccstk[cxix--];
544
545 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
546 {
547 CV *cv = cx->blk_sub.cv;
548
549 if (expect_true (CvDEPTH (cv)))
550 {
551 EXTEND (SP, 3);
552 PUSHs ((SV *)CvPADLIST (cv));
553 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
554 PUSHs ((SV *)cv);
555
556 CvDEPTH (cv) = 0;
557 get_padlist (aTHX_ cv);
558 }
559 }
560 }
561
562 if (expect_true (top_si->si_type == PERLSI_MAIN))
563 break;
564
565 top_si = top_si->si_prev;
566 ccstk = top_si->si_cxstack;
567 cxix = top_si->si_cxix;
568 }
569
570 PUTBACK;
571 }
572
573 /* allocate some space on the context stack for our purposes */
574 /* we manually unroll here, as usually 2 slots is enough */
575 if (SLOT_COUNT >= 1) CXINC;
576 if (SLOT_COUNT >= 2) CXINC;
577 if (SLOT_COUNT >= 3) CXINC;
578 {
579 int i;
580 for (i = 3; i < SLOT_COUNT; ++i)
581 CXINC;
582 }
583 cxstack_ix -= SLOT_COUNT; /* undo allocation */
584
585 c->mainstack = PL_mainstack;
586
587 {
588 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
589
590 slot->defav = GvAV (PL_defgv);
591 slot->defsv = DEFSV;
592 slot->errsv = ERRSV;
593 slot->irsgv = GvSV (irsgv);
594
595 #define VAR(name,type) slot->name = PL_ ## name;
596 # include "state.h"
597 #undef VAR
598 }
599}
600
601/*
602 * allocate various perl stacks. This is almost an exact copy
603 * of perl.c:init_stacks, except that it uses less memory
604 * on the (sometimes correct) assumption that coroutines do
605 * not usually need a lot of stackspace.
606 */
607#if CORO_PREFER_PERL_FUNCTIONS
608# define coro_init_stacks init_stacks
609#else
610static void
611coro_init_stacks (pTHX)
612{
613 PL_curstackinfo = new_stackinfo(32, 8);
614 PL_curstackinfo->si_type = PERLSI_MAIN;
615 PL_curstack = PL_curstackinfo->si_stack;
616 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
617
618 PL_stack_base = AvARRAY(PL_curstack);
619 PL_stack_sp = PL_stack_base;
620 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
621
622 New(50,PL_tmps_stack,32,SV*);
623 PL_tmps_floor = -1;
624 PL_tmps_ix = -1;
625 PL_tmps_max = 32;
626
627 New(54,PL_markstack,16,I32);
628 PL_markstack_ptr = PL_markstack;
629 PL_markstack_max = PL_markstack + 16;
630
631#ifdef SET_MARK_OFFSET
632 SET_MARK_OFFSET;
633#endif
634
635 New(54,PL_scopestack,8,I32);
636 PL_scopestack_ix = 0;
637 PL_scopestack_max = 8;
638
639 New(54,PL_savestack,24,ANY);
640 PL_savestack_ix = 0;
641 PL_savestack_max = 24;
642
643#if !PERL_VERSION_ATLEAST (5,10,0)
644 New(54,PL_retstack,4,OP*);
645 PL_retstack_ix = 0;
646 PL_retstack_max = 4;
647#endif
648}
649#endif
650
651/*
652 * destroy the stacks, the callchain etc...
653 */
654static void
655coro_destruct_stacks (pTHX)
656{
657 while (PL_curstackinfo->si_next)
658 PL_curstackinfo = PL_curstackinfo->si_next;
659
660 while (PL_curstackinfo)
661 {
662 PERL_SI *p = PL_curstackinfo->si_prev;
663
664 if (!IN_DESTRUCT)
665 SvREFCNT_dec (PL_curstackinfo->si_stack);
666
667 Safefree (PL_curstackinfo->si_cxstack);
668 Safefree (PL_curstackinfo);
669 PL_curstackinfo = p;
670 }
671
672 Safefree (PL_tmps_stack);
673 Safefree (PL_markstack);
674 Safefree (PL_scopestack);
675 Safefree (PL_savestack);
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 Safefree (PL_retstack);
678#endif
679}
680
681static size_t
682coro_rss (pTHX_ struct coro *coro)
683{
684 size_t rss = sizeof (*coro);
685
686 if (coro->mainstack)
687 {
688 perl_slots tmp_slot;
689 perl_slots *slot;
690
691 if (coro->flags & CF_RUNNING)
692 {
693 slot = &tmp_slot;
694
695 #define VAR(name,type) slot->name = PL_ ## name;
696 # include "state.h"
697 #undef VAR
698 }
699 else
700 slot = coro->slot;
701
702 if (slot)
703 {
704 rss += sizeof (slot->curstackinfo);
705 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
706 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
707 rss += slot->tmps_max * sizeof (SV *);
708 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
709 rss += slot->scopestack_max * sizeof (I32);
710 rss += slot->savestack_max * sizeof (ANY);
711
712#if !PERL_VERSION_ATLEAST (5,10,0)
713 rss += slot->retstack_max * sizeof (OP *);
714#endif
715 }
716 }
717
718 return rss;
719}
720
721/** coroutine stack handling ************************************************/
722
723static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
726
727/* apparently < 5.8.8 */
728#ifndef MgPV_nolen_const
729#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
730 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
731 (const char*)(mg)->mg_ptr)
732#endif
733
734/*
735 * This overrides the default magic get method of %SIG elements.
736 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737 * and instead of tryign to save and restore the hash elements, we just provide
738 * readback here.
739 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
740 * not expecting this to actually change the hook. This is a potential problem
741 * when a schedule happens then, but we ignore this.
742 */
743static int
744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
745{
746 const char *s = MgPV_nolen_const (mg);
747
748 if (*s == '_')
749 {
750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
756 {
757 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
758 return 0;
759 }
760 }
761
762 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
763}
764
765static int
766coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 SV *old = *svp;
780 *svp = 0;
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
787}
788
789static int
790coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = newSVsv (sv);
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
811}
812
813static void
814prepare_nop (pTHX_ struct coro_transfer_args *ta)
815{
816 /* kind of mega-hacky, but works */
817 ta->next = ta->prev = (struct coro *)ta;
818}
819
820static int
821slf_check_nop (pTHX_ struct CoroSLF *frame)
822{
823 return 0;
824}
825
826static UNOP coro_setup_op;
827
828static void NOINLINE /* noinline to keep it out of the transfer fast path */
829coro_setup (pTHX_ struct coro *coro)
830{
831 /*
832 * emulate part of the perl startup here.
833 */
834 coro_init_stacks (aTHX);
835
836 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0;
840 PL_curpm = 0;
841 PL_curpad = 0;
842 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859
860 {
861 dSP;
862 UNOP myop;
863
864 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop;
866 myop.op_flags = OPf_WANT_VOID;
867
868 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
870 PUTBACK;
871 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 }
875
876 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881
882 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
883 coro_setup_op.op_next = PL_op;
884 coro_setup_op.op_type = OP_CUSTOM;
885 coro_setup_op.op_ppaddr = pp_slf;
886 /* no flags required, as an init function won't be called */
887
888 PL_op = (OP *)&coro_setup_op;
889
890 /* copy throw, in case it was set before coro_setup */
891 CORO_THROW = coro->except;
892}
893
894static void
895coro_destruct (pTHX_ struct coro *coro)
896{
897 if (!IN_DESTRUCT)
898 {
899 /* restore all saved variables and stuff */
900 LEAVE_SCOPE (0);
901 assert (PL_tmps_floor == -1);
902
903 /* free all temporaries */
904 FREETMPS;
905 assert (PL_tmps_ix == -1);
906
907 /* unwind all extra stacks */
908 POPSTACK_TO (PL_mainstack);
909
910 /* unwind main stack */
911 dounwind (-1);
912 }
913
914 SvREFCNT_dec (GvSV (PL_defgv));
915 SvREFCNT_dec (GvAV (PL_defgv));
916 SvREFCNT_dec (GvSV (PL_errgv));
917 SvREFCNT_dec (PL_defoutgv);
918 SvREFCNT_dec (PL_rs);
919 SvREFCNT_dec (GvSV (irsgv));
920
921 SvREFCNT_dec (PL_diehook);
922 SvREFCNT_dec (PL_warnhook);
923
924 SvREFCNT_dec (CORO_THROW);
925 SvREFCNT_dec (coro->saved_deffh);
926 SvREFCNT_dec (coro->rouse_cb);
927
928 coro_destruct_stacks (aTHX);
929}
930
931INLINE void
932free_coro_mortal (pTHX)
933{
934 if (expect_true (coro_mortal))
935 {
936 SvREFCNT_dec (coro_mortal);
937 coro_mortal = 0;
938 }
939}
940
941static int
942runops_trace (pTHX)
943{
944 COP *oldcop = 0;
945 int oldcxix = -2;
946 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
947 coro_cctx *cctx = coro->cctx;
948
949 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
950 {
951 PERL_ASYNC_CHECK ();
952
953 if (cctx->flags & CC_TRACE_ALL)
954 {
955 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
956 {
957 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
958 SV **bot, **top;
959 AV *av = newAV (); /* return values */
960 SV **cb;
961 dSP;
962
963 GV *gv = CvGV (cx->blk_sub.cv);
964 SV *fullname = sv_2mortal (newSV (0));
965 if (isGV (gv))
966 gv_efullname3 (fullname, gv, 0);
967
968 bot = PL_stack_base + cx->blk_oldsp + 1;
969 top = cx->blk_gimme == G_ARRAY ? SP + 1
970 : cx->blk_gimme == G_SCALAR ? bot + 1
971 : bot;
972
973 av_extend (av, top - bot);
974 while (bot < top)
975 av_push (av, SvREFCNT_inc_NN (*bot++));
976
977 PL_runops = RUNOPS_DEFAULT;
978 ENTER;
979 SAVETMPS;
980 EXTEND (SP, 3);
981 PUSHMARK (SP);
982 PUSHs (&PL_sv_no);
983 PUSHs (fullname);
984 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
985 PUTBACK;
986 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
987 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
988 SPAGAIN;
989 FREETMPS;
990 LEAVE;
991 PL_runops = runops_trace;
992 }
993
994 if (oldcop != PL_curcop)
995 {
996 oldcop = PL_curcop;
997
998 if (PL_curcop != &PL_compiling)
999 {
1000 SV **cb;
1001
1002 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1003 {
1004 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1005
1006 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1007 {
1008 runops_proc_t old_runops = PL_runops;
1009 dSP;
1010 GV *gv = CvGV (cx->blk_sub.cv);
1011 SV *fullname = sv_2mortal (newSV (0));
1012
1013 if (isGV (gv))
1014 gv_efullname3 (fullname, gv, 0);
1015
1016 PL_runops = RUNOPS_DEFAULT;
1017 ENTER;
1018 SAVETMPS;
1019 EXTEND (SP, 3);
1020 PUSHMARK (SP);
1021 PUSHs (&PL_sv_yes);
1022 PUSHs (fullname);
1023 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1024 PUTBACK;
1025 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1026 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1027 SPAGAIN;
1028 FREETMPS;
1029 LEAVE;
1030 PL_runops = runops_trace;
1031 }
1032
1033 oldcxix = cxstack_ix;
1034 }
1035
1036 if (cctx->flags & CC_TRACE_LINE)
1037 {
1038 dSP;
1039
1040 PL_runops = RUNOPS_DEFAULT;
1041 ENTER;
1042 SAVETMPS;
1043 EXTEND (SP, 3);
1044 PL_runops = RUNOPS_DEFAULT;
1045 PUSHMARK (SP);
1046 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1047 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1048 PUTBACK;
1049 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1050 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1051 SPAGAIN;
1052 FREETMPS;
1053 LEAVE;
1054 PL_runops = runops_trace;
1055 }
1056 }
1057 }
1058 }
1059 }
1060
1061 TAINT_NOT;
1062 return 0;
1063}
1064
1065static struct coro_cctx *cctx_ssl_cctx;
1066static struct CoroSLF cctx_ssl_frame;
1067
1068static void
1069slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1070{
1071 ta->prev = (struct coro *)cctx_ssl_cctx;
1072 ta->next = 0;
1073}
1074
1075static int
1076slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1077{
1078 *frame = cctx_ssl_frame;
1079
1080 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1081}
1082
1083/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1084static void NOINLINE
1085cctx_prepare (pTHX_ coro_cctx *cctx)
1086{
1087 PL_top_env = &PL_start_env;
1088
1089 if (cctx->flags & CC_TRACE)
1090 PL_runops = runops_trace;
1091
1092 /* we already must be executing an SLF op, there is no other valid way
1093 * that can lead to creation of a new cctx */
1094 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1095 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1096
1097 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1098 cctx_ssl_cctx = cctx;
1099 cctx_ssl_frame = slf_frame;
1100
1101 slf_frame.prepare = slf_prepare_set_stacklevel;
1102 slf_frame.check = slf_check_set_stacklevel;
1103}
1104
1105/* the tail of transfer: execute stuff we can only do after a transfer */
1106INLINE void
1107transfer_tail (pTHX)
1108{
1109 free_coro_mortal (aTHX);
1110}
1111
1112/*
1113 * this is a _very_ stripped down perl interpreter ;)
1114 */
1115static void
1116cctx_run (void *arg)
1117{
1118#ifdef USE_ITHREADS
1119# if CORO_PTHREAD
1120 PERL_SET_CONTEXT (coro_thx);
1121# endif
1122#endif
1123 {
1124 dTHX;
1125
1126 /* normally we would need to skip the entersub here */
1127 /* not doing so will re-execute it, which is exactly what we want */
1128 /* PL_nop = PL_nop->op_next */
1129
1130 /* inject a fake subroutine call to cctx_init */
1131 cctx_prepare (aTHX_ (coro_cctx *)arg);
1132
1133 /* cctx_run is the alternative tail of transfer() */
1134 transfer_tail (aTHX);
1135
1136 /* somebody or something will hit me for both perl_run and PL_restartop */
1137 PL_restartop = PL_op;
1138 perl_run (PL_curinterp);
1139
1140 /*
1141 * If perl-run returns we assume exit() was being called or the coro
1142 * fell off the end, which seems to be the only valid (non-bug)
1143 * reason for perl_run to return. We try to exit by jumping to the
1144 * bootstrap-time "top" top_env, as we cannot restore the "main"
1145 * coroutine as Coro has no such concept
1146 */
1147 PL_top_env = main_top_env;
1148 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1149 }
1150}
1151
1152static coro_cctx *
1153cctx_new ()
1154{
1155 coro_cctx *cctx;
1156
1157 ++cctx_count;
1158 New (0, cctx, 1, coro_cctx);
1159
1160 cctx->gen = cctx_gen;
1161 cctx->flags = 0;
1162 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1163
1164 return cctx;
1165}
1166
1167/* create a new cctx only suitable as source */
1168static coro_cctx *
1169cctx_new_empty ()
1170{
1171 coro_cctx *cctx = cctx_new ();
1172
1173 cctx->sptr = 0;
1174 coro_create (&cctx->cctx, 0, 0, 0, 0);
1175
1176 return cctx;
1177}
1178
1179/* create a new cctx suitable as destination/running a perl interpreter */
1180static coro_cctx *
1181cctx_new_run ()
1182{
1183 coro_cctx *cctx = cctx_new ();
1184 void *stack_start;
1185 size_t stack_size;
1186
1187#if HAVE_MMAP
1188 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1189 /* mmap supposedly does allocate-on-write for us */
1190 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1191
1192 if (cctx->sptr != (void *)-1)
1193 {
1194 #if CORO_STACKGUARD
1195 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1196 #endif
1197 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1198 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1199 cctx->flags |= CC_MAPPED;
1200 }
1201 else
1202#endif
1203 {
1204 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1205 New (0, cctx->sptr, cctx_stacksize, long);
1206
1207 if (!cctx->sptr)
1208 {
1209 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1210 _exit (EXIT_FAILURE);
1211 }
1212
1213 stack_start = cctx->sptr;
1214 stack_size = cctx->ssize;
1215 }
1216
1217 #if CORO_USE_VALGRIND
1218 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1219 #endif
1220
1221 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1222
1223 return cctx;
1224}
1225
1226static void
1227cctx_destroy (coro_cctx *cctx)
1228{
1229 if (!cctx)
1230 return;
1231
1232 --cctx_count;
1233 coro_destroy (&cctx->cctx);
1234
1235 /* coro_transfer creates new, empty cctx's */
1236 if (cctx->sptr)
1237 {
1238 #if CORO_USE_VALGRIND
1239 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1240 #endif
1241
1242#if HAVE_MMAP
1243 if (cctx->flags & CC_MAPPED)
1244 munmap (cctx->sptr, cctx->ssize);
1245 else
1246#endif
1247 Safefree (cctx->sptr);
1248 }
1249
1250 Safefree (cctx);
1251}
1252
1253/* wether this cctx should be destructed */
1254#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1255
1256static coro_cctx *
1257cctx_get (pTHX)
1258{
1259 while (expect_true (cctx_first))
1260 {
1261 coro_cctx *cctx = cctx_first;
1262 cctx_first = cctx->next;
1263 --cctx_idle;
1264
1265 if (expect_true (!CCTX_EXPIRED (cctx)))
1266 return cctx;
1267
1268 cctx_destroy (cctx);
1269 }
1270
1271 return cctx_new_run ();
1272}
1273
1274static void
1275cctx_put (coro_cctx *cctx)
1276{
1277 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1278
1279 /* free another cctx if overlimit */
1280 if (expect_false (cctx_idle >= cctx_max_idle))
1281 {
1282 coro_cctx *first = cctx_first;
1283 cctx_first = first->next;
1284 --cctx_idle;
1285
1286 cctx_destroy (first);
1287 }
1288
1289 ++cctx_idle;
1290 cctx->next = cctx_first;
1291 cctx_first = cctx;
1292}
1293
1294/** coroutine switching *****************************************************/
1295
1296static void
1297transfer_check (pTHX_ struct coro *prev, struct coro *next)
1298{
1299 /* TODO: throwing up here is considered harmful */
1300
1301 if (expect_true (prev != next))
1302 {
1303 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1304 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1305
1306 if (expect_false (next->flags & CF_RUNNING))
1307 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1308
1309 if (expect_false (next->flags & CF_DESTROYED))
1310 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1311
1312#if !PERL_VERSION_ATLEAST (5,10,0)
1313 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1314 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1315#endif
1316 }
1317}
1318
1319/* always use the TRANSFER macro */
1320static void NOINLINE /* noinline so we have a fixed stackframe */
1321transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1322{
1323 dSTACKLEVEL;
1324
1325 /* sometimes transfer is only called to set idle_sp */
1326 if (expect_false (!next))
1327 {
1328 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1329 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1330 }
1331 else if (expect_true (prev != next))
1332 {
1333 coro_cctx *prev__cctx;
1334
1335 if (expect_false (prev->flags & CF_NEW))
1336 {
1337 /* create a new empty/source context */
1338 prev->cctx = cctx_new_empty ();
1339 prev->flags &= ~CF_NEW;
1340 prev->flags |= CF_RUNNING;
1341 }
1342
1343 prev->flags &= ~CF_RUNNING;
1344 next->flags |= CF_RUNNING;
1345
1346 /* first get rid of the old state */
1347 save_perl (aTHX_ prev);
1348
1349 if (expect_false (next->flags & CF_NEW))
1350 {
1351 /* need to start coroutine */
1352 next->flags &= ~CF_NEW;
1353 /* setup coroutine call */
1354 coro_setup (aTHX_ next);
1355 }
1356 else
1357 load_perl (aTHX_ next);
1358
1359 prev__cctx = prev->cctx;
1360
1361 /* possibly untie and reuse the cctx */
1362 if (expect_true (
1363 prev__cctx->idle_sp == STACKLEVEL
1364 && !(prev__cctx->flags & CC_TRACE)
1365 && !force_cctx
1366 ))
1367 {
1368 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1369 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1370
1371 prev->cctx = 0;
1372
1373 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1374 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1375 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1376 if (!next->cctx)
1377 next->cctx = cctx_get (aTHX);
1378
1379 cctx_put (prev__cctx);
1380 }
1381
1382 ++next->usecount;
1383
1384 if (expect_true (!next->cctx))
1385 next->cctx = cctx_get (aTHX);
1386
1387 if (expect_false (prev__cctx != next->cctx))
1388 {
1389 prev__cctx->top_env = PL_top_env;
1390 PL_top_env = next->cctx->top_env;
1391 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1392 }
1393
1394 transfer_tail (aTHX);
1395 }
1396}
1397
1398#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1399#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1400
1401/** high level stuff ********************************************************/
1402
1403static int
1404coro_state_destroy (pTHX_ struct coro *coro)
1405{
1406 if (coro->flags & CF_DESTROYED)
1407 return 0;
1408
1409 if (coro->on_destroy)
1410 coro->on_destroy (aTHX_ coro);
1411
1412 coro->flags |= CF_DESTROYED;
1413
1414 if (coro->flags & CF_READY)
1415 {
1416 /* reduce nready, as destroying a ready coro effectively unreadies it */
1417 /* alternative: look through all ready queues and remove the coro */
1418 --coro_nready;
1419 }
1420 else
1421 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1422
1423 if (coro->mainstack && coro->mainstack != main_mainstack)
1424 {
1425 struct coro temp;
1426
1427 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1428
1429 save_perl (aTHX_ &temp);
1430 load_perl (aTHX_ coro);
1431
1432 coro_destruct (aTHX_ coro);
1433
1434 load_perl (aTHX_ &temp);
1435
1436 coro->slot = 0;
1437 }
1438
1439 cctx_destroy (coro->cctx);
1440 SvREFCNT_dec (coro->args);
1441
1442 if (coro->next) coro->next->prev = coro->prev;
1443 if (coro->prev) coro->prev->next = coro->next;
1444 if (coro == coro_first) coro_first = coro->next;
1445
1446 return 1;
1447}
1448
1449static int
1450coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1451{
1452 struct coro *coro = (struct coro *)mg->mg_ptr;
1453 mg->mg_ptr = 0;
1454
1455 coro->hv = 0;
1456
1457 if (--coro->refcnt < 0)
1458 {
1459 coro_state_destroy (aTHX_ coro);
1460 Safefree (coro);
1461 }
1462
1463 return 0;
1464}
1465
1466static int
1467coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1468{
1469 struct coro *coro = (struct coro *)mg->mg_ptr;
1470
1471 ++coro->refcnt;
1472
1473 return 0;
1474}
1475
1476static MGVTBL coro_state_vtbl = {
1477 0, 0, 0, 0,
1478 coro_state_free,
1479 0,
1480#ifdef MGf_DUP
1481 coro_state_dup,
1482#else
1483# define MGf_DUP 0
1484#endif
1485};
1486
1487static void
1488prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1489{
1490 ta->prev = SvSTATE (prev_sv);
1491 ta->next = SvSTATE (next_sv);
1492 TRANSFER_CHECK (*ta);
1493}
1494
1495static void
1496api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1497{
1498 struct coro_transfer_args ta;
1499
1500 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1501 TRANSFER (ta, 1);
1502}
1503
1504/*****************************************************************************/
1505/* gensub: simple closure generation utility */
1506
1507#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1508
1509/* create a closure from XS, returns a code reference */
1510/* the arg can be accessed via GENSUB_ARG from the callback */
1511/* the callback must use dXSARGS/XSRETURN */
810static SV * 1512static SV *
811coro_deq (int min_prio) 1513gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
812{ 1514{
813 int prio = PRIO_MAX - PRIO_MIN; 1515 CV *cv = (CV *)newSV (0);
814 1516
815 min_prio -= PRIO_MIN; 1517 sv_upgrade ((SV *)cv, SVt_PVCV);
816 if (min_prio < 0)
817 min_prio = 0;
818 1518
1519 CvANON_on (cv);
1520 CvISXSUB_on (cv);
1521 CvXSUB (cv) = xsub;
1522 GENSUB_ARG = arg;
1523
1524 return newRV_noinc ((SV *)cv);
1525}
1526
1527/** Coro ********************************************************************/
1528
1529INLINE void
1530coro_enq (pTHX_ struct coro *coro)
1531{
1532 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1533}
1534
1535INLINE SV *
1536coro_deq (pTHX)
1537{
1538 int prio;
1539
819 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1540 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
820 if (av_len (coro_ready[prio]) >= 0) 1541 if (AvFILLp (coro_ready [prio]) >= 0)
821 {
822 coro_nready--;
823 return av_shift (coro_ready[prio]); 1542 return av_shift (coro_ready [prio]);
824 }
825 1543
826 return 0; 1544 return 0;
827} 1545}
828 1546
829static void 1547static int
830api_ready (SV *coro) 1548api_ready (pTHX_ SV *coro_sv)
831{ 1549{
832 coro_enq (SvREFCNT_inc (coro)); 1550 struct coro *coro;
833} 1551 SV *sv_hook;
1552 void (*xs_hook)(void);
834 1553
1554 if (SvROK (coro_sv))
1555 coro_sv = SvRV (coro_sv);
1556
1557 coro = SvSTATE (coro_sv);
1558
1559 if (coro->flags & CF_READY)
1560 return 0;
1561
1562 coro->flags |= CF_READY;
1563
1564 sv_hook = coro_nready ? 0 : coro_readyhook;
1565 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1566
1567 coro_enq (aTHX_ coro);
1568 ++coro_nready;
1569
1570 if (sv_hook)
1571 {
1572 dSP;
1573
1574 ENTER;
1575 SAVETMPS;
1576
1577 PUSHMARK (SP);
1578 PUTBACK;
1579 call_sv (sv_hook, G_VOID | G_DISCARD);
1580
1581 FREETMPS;
1582 LEAVE;
1583 }
1584
1585 if (xs_hook)
1586 xs_hook ();
1587
1588 return 1;
1589}
1590
835static void 1591static int
836api_schedule (int cede) 1592api_is_ready (pTHX_ SV *coro_sv)
837{ 1593{
1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1595}
1596
1597INLINE void
1598prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1599{
838 SV *prev, *next; 1600 SV *prev_sv, *next_sv;
839 1601
1602 for (;;)
1603 {
1604 next_sv = coro_deq (aTHX);
1605
1606 /* nothing to schedule: call the idle handler */
1607 if (expect_false (!next_sv))
1608 {
1609 dSP;
1610
1611 ENTER;
1612 SAVETMPS;
1613
1614 PUSHMARK (SP);
1615 PUTBACK;
1616 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1617
1618 FREETMPS;
1619 LEAVE;
1620 continue;
1621 }
1622
1623 ta->next = SvSTATE_hv (next_sv);
1624
1625 /* cannot transfer to destroyed coros, skip and look for next */
1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1627 {
1628 SvREFCNT_dec (next_sv);
1629 /* coro_nready has already been taken care of by destroy */
1630 continue;
1631 }
1632
1633 --coro_nready;
1634 break;
1635 }
1636
1637 /* free this only after the transfer */
840 prev = GvSV (coro_current); 1638 prev_sv = SvRV (coro_current);
1639 ta->prev = SvSTATE_hv (prev_sv);
1640 TRANSFER_CHECK (*ta);
1641 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1642 ta->next->flags &= ~CF_READY;
1643 SvRV_set (coro_current, next_sv);
841 1644
842 if (cede) 1645 free_coro_mortal (aTHX);
843 coro_enq (SvREFCNT_inc (prev)); 1646 coro_mortal = prev_sv;
1647}
844 1648
845 next = coro_deq (PRIO_MIN); 1649INLINE void
1650prepare_cede (pTHX_ struct coro_transfer_args *ta)
1651{
1652 api_ready (aTHX_ coro_current);
1653 prepare_schedule (aTHX_ ta);
1654}
846 1655
847 if (!next) 1656INLINE void
848 next = SvREFCNT_inc (GvSV (coro_idle)); 1657prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1658{
1659 SV *prev = SvRV (coro_current);
849 1660
850 GvSV (coro_current) = SvREFCNT_inc (next); 1661 if (coro_nready)
851 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 1662 {
852 sv_to_coro (next, "Coro::schedule", "next coroutine"), 1663 prepare_schedule (aTHX_ ta);
853 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1664 api_ready (aTHX_ prev);
1665 }
1666 else
1667 prepare_nop (aTHX_ ta);
1668}
1669
1670static void
1671api_schedule (pTHX)
1672{
1673 struct coro_transfer_args ta;
1674
1675 prepare_schedule (aTHX_ &ta);
1676 TRANSFER (ta, 1);
1677}
1678
1679static int
1680api_cede (pTHX)
1681{
1682 struct coro_transfer_args ta;
1683
1684 prepare_cede (aTHX_ &ta);
1685
1686 if (expect_true (ta.prev != ta.next))
1687 {
1688 TRANSFER (ta, 1);
1689 return 1;
1690 }
1691 else
1692 return 0;
1693}
1694
1695static int
1696api_cede_notself (pTHX)
1697{
1698 if (coro_nready)
1699 {
1700 struct coro_transfer_args ta;
1701
1702 prepare_cede_notself (aTHX_ &ta);
1703 TRANSFER (ta, 1);
1704 return 1;
1705 }
1706 else
1707 return 0;
1708}
1709
1710static void
1711api_trace (pTHX_ SV *coro_sv, int flags)
1712{
1713 struct coro *coro = SvSTATE (coro_sv);
1714
1715 if (flags & CC_TRACE)
1716 {
1717 if (!coro->cctx)
1718 coro->cctx = cctx_new_run ();
1719 else if (!(coro->cctx->flags & CC_TRACE))
1720 croak ("cannot enable tracing on coroutine with custom stack,");
1721
1722 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1723 }
1724 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1725 {
1726 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1727
1728 if (coro->flags & CF_RUNNING)
1729 PL_runops = RUNOPS_DEFAULT;
1730 else
1731 coro->slot->runops = RUNOPS_DEFAULT;
1732 }
1733}
1734
1735/*****************************************************************************/
1736/* rouse callback */
1737
1738#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1739
1740static void
1741coro_rouse_callback (pTHX_ CV *cv)
1742{
1743 dXSARGS;
1744 SV *data = (SV *)GENSUB_ARG;
1745
1746 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1747 {
1748 /* first call, set args */
1749 int i;
1750 AV *av = newAV ();
1751 SV *coro = SvRV (data);
1752
1753 SvRV_set (data, (SV *)av);
1754 api_ready (aTHX_ coro);
1755 SvREFCNT_dec (coro);
1756
1757 while (items--)
1758 av_store (av, items, SvREFCNT_inc_NN (ST (items)));
1759 }
1760
1761 XSRETURN_EMPTY;
1762}
1763
1764static int
1765slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1766{
1767 SV *data = (SV *)frame->data;
1768
1769 if (CORO_THROW)
1770 return 0;
1771
1772 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1773 return 1;
1774
1775 /* now push all results on the stack */
1776 {
1777 dSP;
1778 AV *av = (AV *)SvRV (data);
1779 int i;
1780
1781 EXTEND (SP, AvFILLp (av) + 1);
1782 for (i = 0; i <= AvFILLp (av); ++i)
1783 PUSHs (AvARRAY (av)[i]);
1784
1785 PUTBACK;
1786 }
1787
1788 return 0;
1789}
1790
1791static void
1792slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1793{
1794 SV *cb;
1795
1796 if (items)
1797 cb = arg [0];
1798 else
1799 {
1800 struct coro *coro = SvSTATE_current;
1801
1802 if (!coro->rouse_cb)
1803 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1804
1805 cb = sv_2mortal (coro->rouse_cb);
1806 coro->rouse_cb = 0;
1807 }
1808
1809 if (!SvROK (cb)
1810 || SvTYPE (SvRV (cb)) != SVt_PVCV
1811 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1812 croak ("Coro::rouse_wait called with illegal callback argument,");
1813
1814 {
1815 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1816 SV *data = (SV *)GENSUB_ARG;
1817
1818 frame->data = (void *)data;
1819 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1820 frame->check = slf_check_rouse_wait;
1821 }
1822}
1823
1824static SV *
1825coro_new_rouse_cb (pTHX)
1826{
1827 HV *hv = (HV *)SvRV (coro_current);
1828 struct coro *coro = SvSTATE_hv (hv);
1829 SV *data = newRV_inc ((SV *)hv);
1830 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1831
1832 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1833
1834 SvREFCNT_dec (coro->rouse_cb);
1835 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1836
1837 return cb;
1838}
1839
1840/*****************************************************************************/
1841/* schedule-like-function opcode (SLF) */
1842
1843static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1844static const CV *slf_cv;
1845static SV **slf_argv;
1846static int slf_argc, slf_arga; /* count, allocated */
1847static I32 slf_ax; /* top of stack, for restore */
1848
1849/* this restores the stack in the case we patched the entersub, to */
1850/* recreate the stack frame as perl will on following calls */
1851/* since entersub cleared the stack */
1852static OP *
1853pp_restore (pTHX)
1854{
1855 int i;
1856 SV **SP = PL_stack_base + slf_ax;
1857
1858 PUSHMARK (SP);
1859
1860 EXTEND (SP, slf_argc + 1);
1861
1862 for (i = 0; i < slf_argc; ++i)
1863 PUSHs (sv_2mortal (slf_argv [i]));
1864
1865 PUSHs ((SV *)CvGV (slf_cv));
1866
1867 RETURNOP (slf_restore.op_first);
1868}
1869
1870static void
1871slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1872{
1873 SV **arg = (SV **)slf_frame.data;
1874
1875 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1876}
1877
1878static void
1879slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1880{
1881 if (items != 2)
1882 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1883
1884 frame->prepare = slf_prepare_transfer;
1885 frame->check = slf_check_nop;
1886 frame->data = (void *)arg; /* let's hope it will stay valid */
1887}
1888
1889static void
1890slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1891{
1892 frame->prepare = prepare_schedule;
1893 frame->check = slf_check_nop;
1894}
1895
1896static void
1897slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1898{
1899 frame->prepare = prepare_cede;
1900 frame->check = slf_check_nop;
1901}
1902
1903static void
1904slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1905{
1906 frame->prepare = prepare_cede_notself;
1907 frame->check = slf_check_nop;
1908}
1909
1910/*
1911 * these not obviously related functions are all rolled into one
1912 * function to increase chances that they all will call transfer with the same
1913 * stack offset
1914 * SLF stands for "schedule-like-function".
1915 */
1916static OP *
1917pp_slf (pTHX)
1918{
1919 I32 checkmark; /* mark SP to see how many elements check has pushed */
1920
1921 /* set up the slf frame, unless it has already been set-up */
1922 /* the latter happens when a new coro has been started */
1923 /* or when a new cctx was attached to an existing coroutine */
1924 if (expect_true (!slf_frame.prepare))
1925 {
1926 /* first iteration */
1927 dSP;
1928 SV **arg = PL_stack_base + TOPMARK + 1;
1929 int items = SP - arg; /* args without function object */
1930 SV *gv = *sp;
1931
1932 /* do a quick consistency check on the "function" object, and if it isn't */
1933 /* for us, divert to the real entersub */
1934 if (SvTYPE (gv) != SVt_PVGV
1935 || !GvCV (gv)
1936 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1937 return PL_ppaddr[OP_ENTERSUB](aTHX);
1938
1939 if (!(PL_op->op_flags & OPf_STACKED))
1940 {
1941 /* ampersand-form of call, use @_ instead of stack */
1942 AV *av = GvAV (PL_defgv);
1943 arg = AvARRAY (av);
1944 items = AvFILLp (av) + 1;
1945 }
1946
1947 /* now call the init function, which needs to set up slf_frame */
1948 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1949 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1950
1951 /* pop args */
1952 SP = PL_stack_base + POPMARK;
1953
1954 PUTBACK;
1955 }
1956
1957 /* now that we have a slf_frame, interpret it! */
1958 /* we use a callback system not to make the code needlessly */
1959 /* complicated, but so we can run multiple perl coros from one cctx */
1960
1961 do
1962 {
1963 struct coro_transfer_args ta;
1964
1965 slf_frame.prepare (aTHX_ &ta);
1966 TRANSFER (ta, 0);
1967
1968 checkmark = PL_stack_sp - PL_stack_base;
1969 }
1970 while (slf_frame.check (aTHX_ &slf_frame));
1971
1972 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1973
1974 /* exception handling */
1975 if (expect_false (CORO_THROW))
1976 {
1977 SV *exception = sv_2mortal (CORO_THROW);
1978
1979 CORO_THROW = 0;
1980 sv_setsv (ERRSV, exception);
1981 croak (0);
1982 }
1983
1984 /* return value handling - mostly like entersub */
1985 /* make sure we put something on the stack in scalar context */
1986 if (GIMME_V == G_SCALAR)
1987 {
1988 dSP;
1989 SV **bot = PL_stack_base + checkmark;
1990
1991 if (sp == bot) /* too few, push undef */
1992 bot [1] = &PL_sv_undef;
1993 else if (sp != bot + 1) /* too many, take last one */
1994 bot [1] = *sp;
1995
1996 SP = bot + 1;
1997
1998 PUTBACK;
1999 }
2000
2001 return NORMAL;
2002}
2003
2004static void
2005api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2006{
2007 int i;
2008 SV **arg = PL_stack_base + ax;
2009 int items = PL_stack_sp - arg + 1;
2010
2011 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2012
2013 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2014 && PL_op->op_ppaddr != pp_slf)
2015 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2016
2017 CvFLAGS (cv) |= CVf_SLF;
2018 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2019 slf_cv = cv;
2020
2021 /* we patch the op, and then re-run the whole call */
2022 /* we have to put the same argument on the stack for this to work */
2023 /* and this will be done by pp_restore */
2024 slf_restore.op_next = (OP *)&slf_restore;
2025 slf_restore.op_type = OP_CUSTOM;
2026 slf_restore.op_ppaddr = pp_restore;
2027 slf_restore.op_first = PL_op;
2028
2029 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2030
2031 if (PL_op->op_flags & OPf_STACKED)
2032 {
2033 if (items > slf_arga)
2034 {
2035 slf_arga = items;
2036 free (slf_argv);
2037 slf_argv = malloc (slf_arga * sizeof (SV *));
2038 }
2039
2040 slf_argc = items;
2041
2042 for (i = 0; i < items; ++i)
2043 slf_argv [i] = SvREFCNT_inc (arg [i]);
2044 }
2045 else
2046 slf_argc = 0;
2047
2048 PL_op->op_ppaddr = pp_slf;
2049 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2050
2051 PL_op = (OP *)&slf_restore;
2052}
2053
2054/*****************************************************************************/
2055/* PerlIO::cede */
2056
2057typedef struct
2058{
2059 PerlIOBuf base;
2060 NV next, every;
2061} PerlIOCede;
2062
2063static IV
2064PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2065{
2066 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2067
2068 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2069 self->next = nvtime () + self->every;
2070
2071 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2072}
2073
2074static SV *
2075PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2076{
2077 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2078
2079 return newSVnv (self->every);
2080}
2081
2082static IV
2083PerlIOCede_flush (pTHX_ PerlIO *f)
2084{
2085 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2086 double now = nvtime ();
2087
2088 if (now >= self->next)
2089 {
2090 api_cede (aTHX);
2091 self->next = now + self->every;
2092 }
2093
2094 return PerlIOBuf_flush (aTHX_ f);
2095}
2096
2097static PerlIO_funcs PerlIO_cede =
2098{
2099 sizeof(PerlIO_funcs),
2100 "cede",
2101 sizeof(PerlIOCede),
2102 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2103 PerlIOCede_pushed,
2104 PerlIOBuf_popped,
2105 PerlIOBuf_open,
2106 PerlIOBase_binmode,
2107 PerlIOCede_getarg,
2108 PerlIOBase_fileno,
2109 PerlIOBuf_dup,
2110 PerlIOBuf_read,
2111 PerlIOBuf_unread,
2112 PerlIOBuf_write,
2113 PerlIOBuf_seek,
2114 PerlIOBuf_tell,
2115 PerlIOBuf_close,
2116 PerlIOCede_flush,
2117 PerlIOBuf_fill,
2118 PerlIOBase_eof,
2119 PerlIOBase_error,
2120 PerlIOBase_clearerr,
2121 PerlIOBase_setlinebuf,
2122 PerlIOBuf_get_base,
2123 PerlIOBuf_bufsiz,
2124 PerlIOBuf_get_ptr,
2125 PerlIOBuf_get_cnt,
2126 PerlIOBuf_set_ptrcnt,
2127};
2128
2129/*****************************************************************************/
2130/* Coro::Semaphore & Coro::Signal */
2131
2132static SV *
2133coro_waitarray_new (pTHX_ int count)
2134{
2135 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2136 AV *av = newAV ();
2137 SV **ary;
2138
2139 /* unfortunately, building manually saves memory */
2140 Newx (ary, 2, SV *);
2141 AvALLOC (av) = ary;
2142 AvARRAY (av) = ary;
2143 AvMAX (av) = 1;
2144 AvFILLp (av) = 0;
2145 ary [0] = newSViv (count);
2146
2147 return newRV_noinc ((SV *)av);
2148}
2149
2150/* semaphore */
2151
2152static void
2153coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2154{
2155 SV *count_sv = AvARRAY (av)[0];
2156 IV count = SvIVX (count_sv);
2157
2158 count += adjust;
2159 SvIVX (count_sv) = count;
2160
2161 /* now wake up as many waiters as are expected to lock */
2162 while (count > 0 && AvFILLp (av) > 0)
2163 {
2164 SV *cb;
2165
2166 /* swap first two elements so we can shift a waiter */
2167 AvARRAY (av)[0] = AvARRAY (av)[1];
2168 AvARRAY (av)[1] = count_sv;
2169 cb = av_shift (av);
2170
2171 if (SvOBJECT (cb))
2172 api_ready (aTHX_ cb);
2173 else
2174 croak ("callbacks not yet supported");
2175
854 SvREFCNT_dec (next); 2176 SvREFCNT_dec (cb);
2177
2178 --count;
2179 }
2180}
2181
2182static void
2183coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2184{
2185 /* call $sem->adjust (0) to possibly wake up some other waiters */
2186 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2187}
2188
2189static int
2190slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2191{
2192 AV *av = (AV *)frame->data;
2193 SV *count_sv = AvARRAY (av)[0];
2194
2195 /* if we are about to throw, don't actually acquire the lock, just throw */
2196 if (CORO_THROW)
2197 return 0;
2198 else if (SvIVX (count_sv) > 0)
2199 {
2200 SvSTATE_current->on_destroy = 0;
2201
2202 if (acquire)
2203 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2204 else
2205 coro_semaphore_adjust (aTHX_ av, 0);
2206
2207 return 0;
2208 }
2209 else
2210 {
2211 int i;
2212 /* if we were woken up but can't down, we look through the whole */
2213 /* waiters list and only add us if we aren't in there already */
2214 /* this avoids some degenerate memory usage cases */
2215
2216 for (i = 1; i <= AvFILLp (av); ++i)
2217 if (AvARRAY (av)[i] == SvRV (coro_current))
2218 return 1;
2219
2220 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2221 return 1;
2222 }
2223}
2224
2225static int
2226slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2227{
2228 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2229}
2230
2231static int
2232slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2233{
2234 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2235}
2236
2237static void
2238slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2239{
2240 AV *av = (AV *)SvRV (arg [0]);
2241
2242 if (SvIVX (AvARRAY (av)[0]) > 0)
2243 {
2244 frame->data = (void *)av;
2245 frame->prepare = prepare_nop;
2246 }
2247 else
2248 {
2249 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2250
2251 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2252 frame->prepare = prepare_schedule;
2253
2254 /* to avoid race conditions when a woken-up coro gets terminated */
2255 /* we arrange for a temporary on_destroy that calls adjust (0) */
2256 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2257 }
2258}
2259
2260static void
2261slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2262{
2263 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2264 frame->check = slf_check_semaphore_down;
2265}
2266
2267static void
2268slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2269{
2270 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2271 frame->check = slf_check_semaphore_wait;
2272}
2273
2274/* signal */
2275
2276static void
2277coro_signal_wake (pTHX_ AV *av, int count)
2278{
2279 SvIVX (AvARRAY (av)[0]) = 0;
2280
2281 /* now signal count waiters */
2282 while (count > 0 && AvFILLp (av) > 0)
2283 {
2284 SV *cb;
2285
2286 /* swap first two elements so we can shift a waiter */
2287 cb = AvARRAY (av)[0];
2288 AvARRAY (av)[0] = AvARRAY (av)[1];
2289 AvARRAY (av)[1] = cb;
2290
2291 cb = av_shift (av);
2292
2293 api_ready (aTHX_ cb);
2294 sv_setiv (cb, 0); /* signal waiter */
2295 SvREFCNT_dec (cb);
2296
2297 --count;
2298 }
2299}
2300
2301static int
2302slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2303{
2304 /* if we are about to throw, also stop waiting */
2305 return SvROK ((SV *)frame->data) && !CORO_THROW;
2306}
2307
2308static void
2309slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2310{
2311 AV *av = (AV *)SvRV (arg [0]);
2312
2313 if (SvIVX (AvARRAY (av)[0]))
2314 {
2315 SvIVX (AvARRAY (av)[0]) = 0;
2316 frame->prepare = prepare_nop;
2317 frame->check = slf_check_nop;
2318 }
2319 else
2320 {
2321 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2322
2323 av_push (av, waiter);
2324
2325 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2326 frame->prepare = prepare_schedule;
2327 frame->check = slf_check_signal_wait;
2328 }
2329}
2330
2331/*****************************************************************************/
2332/* Coro::AIO */
2333
2334#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2335
2336/* helper storage struct */
2337struct io_state
2338{
2339 int errorno;
2340 I32 laststype; /* U16 in 5.10.0 */
2341 int laststatval;
2342 Stat_t statcache;
2343};
2344
2345static void
2346coro_aio_callback (pTHX_ CV *cv)
2347{
2348 dXSARGS;
2349 AV *state = (AV *)GENSUB_ARG;
2350 SV *coro = av_pop (state);
2351 SV *data_sv = newSV (sizeof (struct io_state));
2352
2353 av_extend (state, items);
2354
2355 sv_upgrade (data_sv, SVt_PV);
2356 SvCUR_set (data_sv, sizeof (struct io_state));
2357 SvPOK_only (data_sv);
2358
2359 {
2360 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2361
2362 data->errorno = errno;
2363 data->laststype = PL_laststype;
2364 data->laststatval = PL_laststatval;
2365 data->statcache = PL_statcache;
2366 }
2367
2368 /* now build the result vector out of all the parameters and the data_sv */
2369 {
2370 int i;
2371
2372 for (i = 0; i < items; ++i)
2373 av_push (state, SvREFCNT_inc_NN (ST (i)));
2374 }
2375
2376 av_push (state, data_sv);
2377
2378 api_ready (aTHX_ coro);
855 SvREFCNT_dec (prev); 2379 SvREFCNT_dec (coro);
2380 SvREFCNT_dec ((AV *)state);
856} 2381}
857 2382
2383static int
2384slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2385{
2386 AV *state = (AV *)frame->data;
2387
2388 /* if we are about to throw, return early */
2389 /* this does not cancel the aio request, but at least */
2390 /* it quickly returns */
2391 if (CORO_THROW)
2392 return 0;
2393
2394 /* one element that is an RV? repeat! */
2395 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2396 return 1;
2397
2398 /* restore status */
2399 {
2400 SV *data_sv = av_pop (state);
2401 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2402
2403 errno = data->errorno;
2404 PL_laststype = data->laststype;
2405 PL_laststatval = data->laststatval;
2406 PL_statcache = data->statcache;
2407
2408 SvREFCNT_dec (data_sv);
2409 }
2410
2411 /* push result values */
2412 {
2413 dSP;
2414 int i;
2415
2416 EXTEND (SP, AvFILLp (state) + 1);
2417 for (i = 0; i <= AvFILLp (state); ++i)
2418 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2419
2420 PUTBACK;
2421 }
2422
2423 return 0;
2424}
2425
2426static void
2427slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2428{
2429 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2430 SV *coro_hv = SvRV (coro_current);
2431 struct coro *coro = SvSTATE_hv (coro_hv);
2432
2433 /* put our coroutine id on the state arg */
2434 av_push (state, SvREFCNT_inc_NN (coro_hv));
2435
2436 /* first see whether we have a non-zero priority and set it as AIO prio */
2437 if (coro->prio)
2438 {
2439 dSP;
2440
2441 static SV *prio_cv;
2442 static SV *prio_sv;
2443
2444 if (expect_false (!prio_cv))
2445 {
2446 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2447 prio_sv = newSViv (0);
2448 }
2449
2450 PUSHMARK (SP);
2451 sv_setiv (prio_sv, coro->prio);
2452 XPUSHs (prio_sv);
2453
2454 PUTBACK;
2455 call_sv (prio_cv, G_VOID | G_DISCARD);
2456 }
2457
2458 /* now call the original request */
2459 {
2460 dSP;
2461 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2462 int i;
2463
2464 PUSHMARK (SP);
2465
2466 /* first push all args to the stack */
2467 EXTEND (SP, items + 1);
2468
2469 for (i = 0; i < items; ++i)
2470 PUSHs (arg [i]);
2471
2472 /* now push the callback closure */
2473 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2474
2475 /* now call the AIO function - we assume our request is uncancelable */
2476 PUTBACK;
2477 call_sv ((SV *)req, G_VOID | G_DISCARD);
2478 }
2479
2480 /* now that the requets is going, we loop toll we have a result */
2481 frame->data = (void *)state;
2482 frame->prepare = prepare_schedule;
2483 frame->check = slf_check_aio_req;
2484}
2485
2486static void
2487coro_aio_req_xs (pTHX_ CV *cv)
2488{
2489 dXSARGS;
2490
2491 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2492
2493 XSRETURN_EMPTY;
2494}
2495
2496/*****************************************************************************/
2497
858MODULE = Coro::State PACKAGE = Coro::State 2498MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
859 2499
860PROTOTYPES: ENABLE 2500PROTOTYPES: DISABLE
861 2501
862BOOT: 2502BOOT:
863{ /* {} necessary for stoopid perl-5.6.x */ 2503{
864 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2504#ifdef USE_ITHREADS
865 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2505# if CORO_PTHREAD
2506 coro_thx = PERL_GET_CONTEXT;
2507# endif
2508#endif
2509 BOOT_PAGESIZE;
2510
2511 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2512 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2513
2514 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2515 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2516 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2517
2518 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2519 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2520 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2521
866 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2522 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
867 2523
868 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2524 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
869 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2525 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
870 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2526 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
871 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2527 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
872
873 if (!padlist_cache)
874 padlist_cache = newHV ();
875 2528
876 main_mainstack = PL_mainstack; 2529 main_mainstack = PL_mainstack;
2530 main_top_env = PL_top_env;
2531
2532 while (main_top_env->je_prev)
2533 main_top_env = main_top_env->je_prev;
877 2534
878 { 2535 {
879 SV *sv = perl_get_sv("Coro::API", 1); 2536 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
880 2537
881 coroapi.ver = CORO_API_VERSION - 1; 2538 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
882 coroapi.transfer = api_transfer; 2539 hv_store_ent (PL_custom_op_names, slf,
883 coroapi.schedule = api_schedule; 2540 newSVpv ("coro_slf", 0), 0);
884 coroapi.ready = api_ready;
885 coroapi.nready = &coro_nready;
886 2541
887 GCoroAPI = &coroapi; 2542 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
888 sv_setiv(sv, (IV)&coroapi); 2543 hv_store_ent (PL_custom_op_descs, slf,
889 SvREADONLY_on(sv); 2544 newSVpv ("coro schedule like function", 0), 0);
890 } 2545 }
891}
892 2546
893Coro::State 2547 coroapi.ver = CORO_API_VERSION;
894_newprocess(args) 2548 coroapi.rev = CORO_API_REVISION;
895 SV * args 2549
896 PROTOTYPE: $ 2550 coroapi.transfer = api_transfer;
2551
2552 coroapi.sv_state = SvSTATE_;
2553 coroapi.execute_slf = api_execute_slf;
2554 coroapi.prepare_nop = prepare_nop;
2555 coroapi.prepare_schedule = prepare_schedule;
2556 coroapi.prepare_cede = prepare_cede;
2557 coroapi.prepare_cede_notself = prepare_cede_notself;
2558
2559 {
2560 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2561
2562 if (!svp) croak ("Time::HiRes is required");
2563 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2564
2565 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2566 }
2567
2568 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2569}
2570
2571SV *
2572new (char *klass, ...)
897 CODE: 2573 CODE:
898 Coro__State coro; 2574{
2575 struct coro *coro;
2576 MAGIC *mg;
2577 HV *hv;
2578 int i;
899 2579
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); 2580 Newz (0, coro, 1, struct coro);
2581 coro->args = newAV ();
2582 coro->flags = CF_NEW;
904 2583
905 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2584 if (coro_first) coro_first->prev = coro;
906 coro->mainstack = 0; /* actual work is done inside transfer */ 2585 coro->next = coro_first;
907 coro->stack = 0; 2586 coro_first = coro;
908 2587
909 RETVAL = coro; 2588 coro->hv = hv = newHV ();
2589 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2590 mg->mg_flags |= MGf_DUP;
2591 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2592
2593 av_extend (coro->args, items - 1);
2594 for (i = 1; i < items; i++)
2595 av_push (coro->args, newSVsv (ST (i)));
2596}
910 OUTPUT: 2597 OUTPUT:
911 RETVAL 2598 RETVAL
912 2599
913void 2600void
914transfer(prev, next, flags) 2601transfer (...)
915 Coro::State_or_hashref prev
916 Coro::State_or_hashref next
917 int flags
918 PROTOTYPE: @ 2602 PROTOTYPE: $$
919 CODE: 2603 CODE:
920 PUTBACK; 2604 CORO_EXECUTE_SLF_XS (slf_init_transfer);
921 transfer (aTHX_ prev, next, flags); 2605
922 SPAGAIN; 2606bool
2607_destroy (SV *coro_sv)
2608 CODE:
2609 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2610 OUTPUT:
2611 RETVAL
923 2612
924void 2613void
925DESTROY(coro) 2614_exit (int code)
926 Coro::State coro 2615 PROTOTYPE: $
927 CODE: 2616 CODE:
2617 _exit (code);
928 2618
929 if (coro->mainstack && coro->mainstack != main_mainstack) 2619int
2620cctx_stacksize (int new_stacksize = 0)
2621 PROTOTYPE: ;$
2622 CODE:
2623 RETVAL = cctx_stacksize;
2624 if (new_stacksize)
2625 {
2626 cctx_stacksize = new_stacksize;
2627 ++cctx_gen;
2628 }
2629 OUTPUT:
2630 RETVAL
2631
2632int
2633cctx_max_idle (int max_idle = 0)
2634 PROTOTYPE: ;$
2635 CODE:
2636 RETVAL = cctx_max_idle;
2637 if (max_idle > 1)
2638 cctx_max_idle = max_idle;
2639 OUTPUT:
2640 RETVAL
2641
2642int
2643cctx_count ()
2644 PROTOTYPE:
2645 CODE:
2646 RETVAL = cctx_count;
2647 OUTPUT:
2648 RETVAL
2649
2650int
2651cctx_idle ()
2652 PROTOTYPE:
2653 CODE:
2654 RETVAL = cctx_idle;
2655 OUTPUT:
2656 RETVAL
2657
2658void
2659list ()
2660 PROTOTYPE:
2661 PPCODE:
2662{
2663 struct coro *coro;
2664 for (coro = coro_first; coro; coro = coro->next)
2665 if (coro->hv)
2666 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2667}
2668
2669void
2670call (Coro::State coro, SV *coderef)
2671 ALIAS:
2672 eval = 1
2673 CODE:
2674{
2675 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
930 { 2676 {
931 struct coro temp; 2677 struct coro temp;
932 2678
933 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2679 if (!(coro->flags & CF_RUNNING))
934 LOAD(aTHX_ coro); 2680 {
2681 PUTBACK;
2682 save_perl (aTHX_ &temp);
2683 load_perl (aTHX_ coro);
2684 }
935 2685
936 destroy_stacks (aTHX); 2686 {
2687 dSP;
2688 ENTER;
2689 SAVETMPS;
2690 PUTBACK;
2691 PUSHSTACK;
2692 PUSHMARK (SP);
937 2693
938 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2694 if (ix)
2695 eval_sv (coderef, 0);
2696 else
2697 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
939 2698
940 coro->mainstack = 0; 2699 POPSTACK;
2700 SPAGAIN;
2701 FREETMPS;
2702 LEAVE;
2703 PUTBACK;
2704 }
2705
2706 if (!(coro->flags & CF_RUNNING))
2707 {
2708 save_perl (aTHX_ coro);
2709 load_perl (aTHX_ &temp);
2710 SPAGAIN;
2711 }
941 } 2712 }
2713}
942 2714
943 deallocate_stack (coro); 2715SV *
944 2716is_ready (Coro::State coro)
945 Safefree (coro); 2717 PROTOTYPE: $
2718 ALIAS:
2719 is_ready = CF_READY
2720 is_running = CF_RUNNING
2721 is_new = CF_NEW
2722 is_destroyed = CF_DESTROYED
2723 CODE:
2724 RETVAL = boolSV (coro->flags & ix);
2725 OUTPUT:
2726 RETVAL
946 2727
947void 2728void
948flush() 2729throw (Coro::State self, SV *throw = &PL_sv_undef)
949 CODE: 2730 PROTOTYPE: $;$
950#ifdef MAY_FLUSH 2731 CODE:
951 flush_padlist_cache (); 2732{
952#endif 2733 struct coro *current = SvSTATE_current;
2734 SV **throwp = self == current ? &CORO_THROW : &self->except;
2735 SvREFCNT_dec (*throwp);
2736 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2737}
953 2738
954void 2739void
955_exit(code) 2740api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
956 int code 2741 PROTOTYPE: $;$
2742 C_ARGS: aTHX_ coro, flags
2743
2744SV *
2745has_cctx (Coro::State coro)
957 PROTOTYPE: $ 2746 PROTOTYPE: $
958 CODE: 2747 CODE:
959#if defined(__GLIBC__) || _POSIX_C_SOURCE 2748 RETVAL = boolSV (!!coro->cctx);
960 _exit (code); 2749 OUTPUT:
961#else 2750 RETVAL
962 signal (SIGTERM, SIG_DFL);
963 raise (SIGTERM);
964 exit (code);
965#endif
966 2751
967MODULE = Coro::State PACKAGE = Coro::Cont 2752int
2753is_traced (Coro::State coro)
2754 PROTOTYPE: $
2755 CODE:
2756 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2757 OUTPUT:
2758 RETVAL
968 2759
969# this is slightly dirty (should expose a c-level api) 2760UV
2761rss (Coro::State coro)
2762 PROTOTYPE: $
2763 ALIAS:
2764 usecount = 1
2765 CODE:
2766 switch (ix)
2767 {
2768 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2769 case 1: RETVAL = coro->usecount; break;
2770 }
2771 OUTPUT:
2772 RETVAL
970 2773
971void 2774void
972yield(...) 2775force_cctx ()
2776 PROTOTYPE:
2777 CODE:
2778 SvSTATE_current->cctx->idle_sp = 0;
2779
2780void
2781swap_defsv (Coro::State self)
973 PROTOTYPE: @ 2782 PROTOTYPE: $
2783 ALIAS:
2784 swap_defav = 1
974 CODE: 2785 CODE:
975 static SV *returnstk; 2786 if (!self->slot)
976 SV *sv; 2787 croak ("cannot swap state with coroutine that has no saved state,");
977 AV *defav = GvAV (PL_defgv); 2788 else
978 struct coro *prev, *next; 2789 {
2790 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2791 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
979 2792
980 if (!returnstk) 2793 SV *tmp = *src; *src = *dst; *dst = tmp;
981 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2794 }
982 2795
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 2796
997MODULE = Coro::State PACKAGE = Coro 2797MODULE = Coro::State PACKAGE = Coro
998 2798
999# this is slightly dirty (should expose a c-level api)
1000
1001BOOT: 2799BOOT:
1002{ 2800{
1003 int i; 2801 int i;
2802
2803 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2804 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2805 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2806
2807 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2808 SvREADONLY_on (coro_current);
2809
1004 HV *stash = gv_stashpv ("Coro", TRUE); 2810 coro_stash = gv_stashpv ("Coro", TRUE);
1005 2811
1006 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2812 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1007 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2813 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1008 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2814 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1009 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2815 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1010 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2816 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1011 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2817 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 2818
1016 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2819 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1017 coro_ready[i] = newAV (); 2820 coro_ready[i] = newAV ();
2821
2822 {
2823 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2824
2825 coroapi.schedule = api_schedule;
2826 coroapi.cede = api_cede;
2827 coroapi.cede_notself = api_cede_notself;
2828 coroapi.ready = api_ready;
2829 coroapi.is_ready = api_is_ready;
2830 coroapi.nready = coro_nready;
2831 coroapi.current = coro_current;
2832
2833 /*GCoroAPI = &coroapi;*/
2834 sv_setiv (sv, (IV)&coroapi);
2835 SvREADONLY_on (sv);
2836 }
1018} 2837}
1019 2838
1020void 2839void
1021ready(self) 2840schedule (...)
1022 SV * self
1023 CODE: 2841 CODE:
1024 api_ready (self); 2842 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2843
2844void
2845cede (...)
2846 CODE:
2847 CORO_EXECUTE_SLF_XS (slf_init_cede);
2848
2849void
2850cede_notself (...)
2851 CODE:
2852 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2853
2854void
2855_set_current (SV *current)
2856 PROTOTYPE: $
2857 CODE:
2858 SvREFCNT_dec (SvRV (coro_current));
2859 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2860
2861void
2862_set_readyhook (SV *hook)
2863 PROTOTYPE: $
2864 CODE:
2865 SvREFCNT_dec (coro_readyhook);
2866 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1025 2867
1026int 2868int
2869prio (Coro::State coro, int newprio = 0)
2870 PROTOTYPE: $;$
2871 ALIAS:
2872 nice = 1
2873 CODE:
2874{
2875 RETVAL = coro->prio;
2876
2877 if (items > 1)
2878 {
2879 if (ix)
2880 newprio = coro->prio - newprio;
2881
2882 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2883 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2884
2885 coro->prio = newprio;
2886 }
2887}
2888 OUTPUT:
2889 RETVAL
2890
2891SV *
2892ready (SV *self)
2893 PROTOTYPE: $
2894 CODE:
2895 RETVAL = boolSV (api_ready (aTHX_ self));
2896 OUTPUT:
2897 RETVAL
2898
2899int
1027nready(...) 2900nready (...)
1028 PROTOTYPE: 2901 PROTOTYPE:
1029 CODE: 2902 CODE:
1030 RETVAL = coro_nready; 2903 RETVAL = coro_nready;
1031 OUTPUT: 2904 OUTPUT:
1032 RETVAL 2905 RETVAL
1033 2906
2907# for async_pool speedup
1034void 2908void
1035schedule(...) 2909_pool_1 (SV *cb)
1036 PROTOTYPE:
1037 ALIAS:
1038 cede = 1
1039 CODE: 2910 CODE:
1040 api_schedule (ix); 2911{
2912 HV *hv = (HV *)SvRV (coro_current);
2913 struct coro *coro = SvSTATE_hv ((SV *)hv);
2914 AV *defav = GvAV (PL_defgv);
2915 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2916 AV *invoke_av;
2917 int i, len;
1041 2918
2919 if (!invoke)
2920 {
2921 SV *old = PL_diehook;
2922 PL_diehook = 0;
2923 SvREFCNT_dec (old);
2924 croak ("\3async_pool terminate\2\n");
2925 }
2926
2927 SvREFCNT_dec (coro->saved_deffh);
2928 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2929
2930 hv_store (hv, "desc", sizeof ("desc") - 1,
2931 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2932
2933 invoke_av = (AV *)SvRV (invoke);
2934 len = av_len (invoke_av);
2935
2936 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2937
2938 if (len > 0)
2939 {
2940 av_fill (defav, len - 1);
2941 for (i = 0; i < len; ++i)
2942 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2943 }
2944}
2945
2946void
2947_pool_2 (SV *cb)
2948 CODE:
2949{
2950 HV *hv = (HV *)SvRV (coro_current);
2951 struct coro *coro = SvSTATE_hv ((SV *)hv);
2952
2953 sv_setsv (cb, &PL_sv_undef);
2954
2955 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2956 coro->saved_deffh = 0;
2957
2958 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2959 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2960 {
2961 SV *old = PL_diehook;
2962 PL_diehook = 0;
2963 SvREFCNT_dec (old);
2964 croak ("\3async_pool terminate\2\n");
2965 }
2966
2967 av_clear (GvAV (PL_defgv));
2968 hv_store (hv, "desc", sizeof ("desc") - 1,
2969 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2970
2971 coro->prio = 0;
2972
2973 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2974 api_trace (aTHX_ coro_current, 0);
2975
2976 av_push (av_async_pool, newSVsv (coro_current));
2977}
2978
2979SV *
2980rouse_cb ()
2981 PROTOTYPE:
2982 CODE:
2983 RETVAL = coro_new_rouse_cb (aTHX);
2984 OUTPUT:
2985 RETVAL
2986
2987void
2988rouse_wait (SV *cb = 0)
2989 PROTOTYPE: ;$
2990 PPCODE:
2991 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2992
2993
2994MODULE = Coro::State PACKAGE = PerlIO::cede
2995
2996BOOT:
2997 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2998
2999
3000MODULE = Coro::State PACKAGE = Coro::Semaphore
3001
3002SV *
3003new (SV *klass, SV *count = 0)
3004 CODE:
3005 RETVAL = sv_bless (
3006 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3007 GvSTASH (CvGV (cv))
3008 );
3009 OUTPUT:
3010 RETVAL
3011
3012# helper for Coro::Channel
3013SV *
3014_alloc (int count)
3015 CODE:
3016 RETVAL = coro_waitarray_new (aTHX_ count);
3017 OUTPUT:
3018 RETVAL
3019
3020SV *
3021count (SV *self)
3022 CODE:
3023 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3024 OUTPUT:
3025 RETVAL
3026
3027void
3028up (SV *self, int adjust = 1)
3029 ALIAS:
3030 adjust = 1
3031 CODE:
3032 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3033
3034void
3035down (SV *self)
3036 CODE:
3037 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3038
3039void
3040wait (SV *self)
3041 CODE:
3042 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3043
3044void
3045try (SV *self)
3046 PPCODE:
3047{
3048 AV *av = (AV *)SvRV (self);
3049 SV *count_sv = AvARRAY (av)[0];
3050 IV count = SvIVX (count_sv);
3051
3052 if (count > 0)
3053 {
3054 --count;
3055 SvIVX (count_sv) = count;
3056 XSRETURN_YES;
3057 }
3058 else
3059 XSRETURN_NO;
3060}
3061
3062void
3063waiters (SV *self)
3064 PPCODE:
3065{
3066 AV *av = (AV *)SvRV (self);
3067 int wcount = AvFILLp (av) + 1 - 1;
3068
3069 if (GIMME_V == G_SCALAR)
3070 XPUSHs (sv_2mortal (newSViv (wcount)));
3071 else
3072 {
3073 int i;
3074 EXTEND (SP, wcount);
3075 for (i = 1; i <= wcount; ++i)
3076 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3077 }
3078}
3079
3080MODULE = Coro::State PACKAGE = Coro::Signal
3081
3082SV *
3083new (SV *klass)
3084 CODE:
3085 RETVAL = sv_bless (
3086 coro_waitarray_new (aTHX_ 0),
3087 GvSTASH (CvGV (cv))
3088 );
3089 OUTPUT:
3090 RETVAL
3091
3092void
3093wait (SV *self)
3094 CODE:
3095 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3096
3097void
3098broadcast (SV *self)
3099 CODE:
3100{
3101 AV *av = (AV *)SvRV (self);
3102 coro_signal_wake (aTHX_ av, AvFILLp (av));
3103}
3104
3105void
3106send (SV *self)
3107 CODE:
3108{
3109 AV *av = (AV *)SvRV (self);
3110
3111 if (AvFILLp (av))
3112 coro_signal_wake (aTHX_ av, 1);
3113 else
3114 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3115}
3116
3117IV
3118awaited (SV *self)
3119 CODE:
3120 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3121 OUTPUT:
3122 RETVAL
3123
3124
3125MODULE = Coro::State PACKAGE = Coro::AnyEvent
3126
3127BOOT:
3128 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3129
3130void
3131_schedule (...)
3132 CODE:
3133{
3134 static int incede;
3135
3136 api_cede_notself (aTHX);
3137
3138 ++incede;
3139 while (coro_nready >= incede && api_cede (aTHX))
3140 ;
3141
3142 sv_setsv (sv_activity, &PL_sv_undef);
3143 if (coro_nready >= incede)
3144 {
3145 PUSHMARK (SP);
3146 PUTBACK;
3147 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3148 }
3149
3150 --incede;
3151}
3152
3153
3154MODULE = Coro::State PACKAGE = Coro::AIO
3155
3156void
3157_register (char *target, char *proto, SV *req)
3158 CODE:
3159{
3160 HV *st;
3161 GV *gvp;
3162 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
3163 /* newXSproto doesn't return the CV on 5.8 */
3164 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3165 sv_setpv ((SV *)slf_cv, proto);
3166 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3167}
3168

Diff Legend

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