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Comparing Coro/Coro/State.xs (file contents):
Revision 1.23 by root, Tue Aug 14 04:33:58 2001 UTC vs.
Revision 1.313 by root, Thu Nov 20 03:22:59 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
6 12
7#include <signal.h> 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
19#endif 47#endif
20 48
21#define MAY_FLUSH /* increases codesize */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
22 52
23#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 54static int cctx_max_idle = 4;
25 55
26/* The next macro should delcare a variable stacklevel that contains and approximation 56#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 57 (PERL_REVISION > (a) \
28 * and should be unique. */ 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
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 SV *sv_async_pool_idle;
182static AV *av_async_pool;
183static SV *sv_Coro;
184static CV *cv_pool_handler;
185static CV *cv_coro_new;
186
187/* Coro::AnyEvent */
188static SV *sv_activity;
189
190static struct coro_cctx *cctx_first;
191static int cctx_count, cctx_idle;
192
193enum {
194 CC_MAPPED = 0x01,
195 CC_NOREUSE = 0x02, /* throw this away after tracing */
196 CC_TRACE = 0x04,
197 CC_TRACE_SUB = 0x08, /* trace sub calls */
198 CC_TRACE_LINE = 0x10, /* trace each statement */
199 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
200};
201
202/* this is a structure representing a c-level coroutine */
38typedef struct { 203typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 204{
40 int usecnt; /* shared by how many coroutines */ 205 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 206
207 /* the stack */
208 void *sptr;
209 size_t ssize;
210
211 /* cpu state */
212 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
213 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
214 JMPENV *top_env;
43 coro_context cctx; 215 coro_context cctx;
44 216
45 void *sptr; 217 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 218#if CORO_USE_VALGRIND
47} coro_stack; 219 int valgrind_id;
220#endif
221 unsigned char flags;
222} coro_cctx;
48 223
224enum {
225 CF_RUNNING = 0x0001, /* coroutine is running */
226 CF_READY = 0x0002, /* coroutine is ready */
227 CF_NEW = 0x0004, /* has never been switched to */
228 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
229};
230
231/* the structure where most of the perl state is stored, overlaid on the cxstack */
232typedef struct
233{
234 SV *defsv;
235 AV *defav;
236 SV *errsv;
237 SV *irsgv;
238#define VAR(name,type) type name;
239# include "state.h"
240#undef VAR
241} perl_slots;
242
243#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
244
245/* this is a structure representing a perl-level coroutine */
49struct coro { 246struct coro {
50 /* the optional C context */ 247 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 248 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 249
55 /* optionally saved, might be zero */ 250 /* state data */
56 AV *defav; 251 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; 252 AV *mainstack;
68 SV **stack_sp; 253 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;
91 254
255 CV *startcv; /* the CV to execute */
92 /* data associated with this coroutine (initial args) */ 256 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 257 int refcnt; /* coroutines are refcounted, yes */
258 int flags; /* CF_ flags */
259 HV *hv; /* the perl hash associated with this coro, if any */
260 void (*on_destroy)(pTHX_ struct coro *coro);
261
262 /* statistics */
263 int usecount; /* number of transfers to this coro */
264
265 /* coro process data */
266 int prio;
267 SV *except; /* exception to be thrown */
268 SV *rouse_cb;
269
270 /* async_pool */
271 SV *saved_deffh;
272 SV *invoke_cb;
273 AV *invoke_av;
274
275 /* linked list */
276 struct coro *next, *prev;
94}; 277};
95 278
96typedef struct coro *Coro__State; 279typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 280typedef struct coro *Coro__State_or_hashref;
98 281
99static AV *main_mainstack; /* used to differentiate between $main and others */ 282/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 283/* and get copied between struct coro and these variables */
101static SV *ucoro_state_sv; 284/* the mainr easonw e don't support windows process emulation */
102static U32 ucoro_state_hash; 285static 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 dounwind(-1);
520
521 SvREFCNT_dec(PL_curstackinfo->si_stack);
522 Safefree(PL_curstackinfo->si_cxstack);
523 Safefree(PL_curstackinfo);
524 PL_curstackinfo = p;
525 }
526
527 Safefree(PL_tmps_stack);
528 Safefree(PL_markstack);
529 Safefree(PL_scopestack);
530 Safefree(PL_savestack);
531 Safefree(PL_retstack);
532}
533
534static void
535allocate_stack (Coro__State ctx, int alloc)
536{
537 coro_stack *stack;
538
539 New (0, stack, 1, coro_stack);
540
541 stack->refcnt = 1;
542 stack->usecnt = 1;
543 stack->gencnt = ctx->gencnt = 0;
544 if (alloc)
545 {
546#ifdef HAVE_MMAP
547 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
548 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
549 if (stack->sptr == (void *)-1)
550#endif
551 {
552 /*FIXME*//*D*//* reasonable stack size! */
553 stack->ssize = -4096 * sizeof (long);
554 New (0, stack->sptr, 4096, long);
555 }
556 }
557 else
558 stack->sptr = 0;
559
560 ctx->stack = stack;
561}
562
563static void
564deallocate_stack (Coro__State ctx)
565{
566 coro_stack *stack = ctx->stack;
567
568 ctx->stack = 0;
569
570 if (stack)
571 {
572 if (!--stack->refcnt)
573 {
574#ifdef HAVE_MMAP
575 if (stack->ssize > 0 && stack->sptr)
576 munmap (stack->sptr, stack->ssize);
577 else
578#else
579 Safefree (stack->sptr);
580#endif
581 Safefree (stack);
582 }
583 else if (ctx->gencnt == stack->gencnt)
584 --stack->usecnt;
585 }
586}
587
588static void
589setup_coro (void *arg)
590{
591 /*
592 * emulate part of the perl startup here.
593 */
594 dSP;
595 Coro__State ctx = (Coro__State)arg;
596 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
597
598 coro_init_stacks (aTHX);
599 /*PL_curcop = 0;*/
600 /*PL_in_eval = PL_in_eval;*/ /* inherit */
601 SvREFCNT_dec (GvAV (PL_defgv));
602 GvAV (PL_defgv) = ctx->args;
603
604 SPAGAIN;
605
606 if (ctx->stack)
607 {
608 ctx->cursp = 0;
609
610 PUSHMARK(SP);
611 PUTBACK;
612 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
613
614 if (SvTRUE (ERRSV))
615 croak (NULL);
616 else
617 croak ("FATAL: CCTXT coroutine returned!");
618 }
619 else
620 {
621 UNOP myop;
622
623 PL_op = (OP *)&myop;
624
625 Zero(&myop, 1, UNOP);
626 myop.op_next = Nullop;
627 myop.op_flags = OPf_WANT_VOID;
628
629 PUSHMARK(SP);
630 XPUSHs (sub_init);
631 /*
632 * the next line is slightly wrong, as PL_op->op_next
633 * is actually being executed so we skip the first op.
634 * that doesn't matter, though, since it is only
635 * pp_nextstate and we never return...
636 * ah yes, and I don't care anyways ;)
637 */
638 PUTBACK;
639 PL_op = pp_entersub();
640 SPAGAIN;
641
642 ENTER; /* necessary e.g. for dounwind */
643 }
644}
645
646static void
647continue_coro (void *arg)
648{
649 /*
650 * this is a _very_ stripped down perl interpreter ;)
651 */
652 Coro__State ctx = (Coro__State)arg;
653
654 /*FIXME*//* must set up top_env here */
655 ctx->cursp = 0;
656 PL_op = PL_op->op_next;
657 CALLRUNOPS(aTHX);
658
659 abort ();
660}
661
662STATIC void
663transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
664{
665 dSP;
666 dSTACKLEVEL;
667
668 if (prev != next)
669 {
670 if (next->mainstack)
671 {
672 SAVE (prev, flags);
673 LOAD (next);
674
675 /* mark this state as in-use */
676 next->mainstack = 0;
677 next->tmps_ix = -2;
678
679 /* stacklevel changed? if yes, grab the stack for us! */
680 if (flags & TRANSFER_SAVE_CCTXT)
681 {
682 if (!prev->stack)
683 allocate_stack (prev, 0);
684 else if (prev->cursp != stacklevel
685 && prev->stack->usecnt > 1)
686 {
687 prev->gencnt = ++prev->stack->gencnt;
688 prev->stack->usecnt = 1;
689 }
690
691 /* has our stack been invalidated? */
692 if (next->stack && next->stack->gencnt != next->gencnt)
693 {
694 deallocate_stack (next);
695 allocate_stack (next, 1);
696 coro_create (&(next->stack->cctx),
697 continue_coro, (void *)next,
698 next->stack->sptr, labs (next->stack->ssize));
699 }
700
701 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
702 }
703
704 }
705 else if (next->tmps_ix == -2)
706 croak ("tried to transfer to running coroutine");
707 else
708 {
709 SAVE (prev, -1); /* first get rid of the old state */
710
711 if (flags & TRANSFER_SAVE_CCTXT)
712 {
713 if (!prev->stack)
714 allocate_stack (prev, 0);
715
716 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
717 {
718 setup_coro (next);
719
720 prev->stack->refcnt++;
721 prev->stack->usecnt++;
722 next->stack = prev->stack;
723 next->gencnt = prev->gencnt;
724 }
725 else
726 {
727 allocate_stack (next, 1);
728 coro_create (&(next->stack->cctx),
729 setup_coro, (void *)next,
730 next->stack->sptr, labs (next->stack->ssize));
731 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
732 }
733 }
734 else
735 setup_coro (next);
736 }
737 }
738
739 next->cursp = stacklevel;
740}
741
742static struct coro *
743sv_to_coro (SV *arg, const char *funcname, const char *varname)
744{
745 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
746 {
747 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
748
749 if (!he)
750 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
751
752 arg = HeVAL(he);
753 }
754
755 /* must also be changed inside Coro::Cont::yield */
756 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
757 return (struct coro *) SvIV((SV*)SvRV(arg));
758 else
759 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
760}
761
762static void
763api_transfer(pTHX_ SV *prev, SV *next, int flags)
764{
765 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),
766 sv_to_coro (next, "Coro::transfer", "next"),
767 flags);
768}
769 286
770/** Coro ********************************************************************/ 287/** Coro ********************************************************************/
771 288
772#define PRIO_MAX 3 289#define PRIO_MAX 3
773#define PRIO_HIGH 1 290#define PRIO_HIGH 1
… …
775#define PRIO_LOW -1 292#define PRIO_LOW -1
776#define PRIO_IDLE -3 293#define PRIO_IDLE -3
777#define PRIO_MIN -4 294#define PRIO_MIN -4
778 295
779/* for Coro.pm */ 296/* for Coro.pm */
780static GV *coro_current, *coro_idle; 297static SV *coro_current;
298static SV *coro_readyhook;
781static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 299static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
300static CV *cv_coro_run, *cv_coro_terminate;
301static struct coro *coro_first;
302#define coro_nready coroapi.nready
782 303
783static void 304/** lowlevel stuff **********************************************************/
784coro_enq (SV *sv) 305
306static SV *
307coro_get_sv (pTHX_ const char *name, int create)
785{ 308{
786 if (SvROK (sv)) 309#if PERL_VERSION_ATLEAST (5,10,0)
310 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
311 get_sv (name, create);
312#endif
313 return get_sv (name, create);
314}
315
316static AV *
317coro_get_av (pTHX_ const char *name, int create)
318{
319#if PERL_VERSION_ATLEAST (5,10,0)
320 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
321 get_av (name, create);
322#endif
323 return get_av (name, create);
324}
325
326static HV *
327coro_get_hv (pTHX_ const char *name, int create)
328{
329#if PERL_VERSION_ATLEAST (5,10,0)
330 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
331 get_hv (name, create);
332#endif
333 return get_hv (name, create);
334}
335
336/* may croak */
337INLINE CV *
338coro_sv_2cv (pTHX_ SV *sv)
339{
340 HV *st;
341 GV *gvp;
342 return sv_2cv (sv, &st, &gvp, 0);
343}
344
345static AV *
346coro_clone_padlist (pTHX_ CV *cv)
347{
348 AV *padlist = CvPADLIST (cv);
349 AV *newpadlist, *newpad;
350
351 newpadlist = newAV ();
352 AvREAL_off (newpadlist);
353#if PERL_VERSION_ATLEAST (5,10,0)
354 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
355#else
356 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
357#endif
358 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
359 --AvFILLp (padlist);
360
361 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
362 av_store (newpadlist, 1, (SV *)newpad);
363
364 return newpadlist;
365}
366
367static void
368free_padlist (pTHX_ AV *padlist)
369{
370 /* may be during global destruction */
371 if (SvREFCNT (padlist))
787 { 372 {
788 SV *hv = SvRV (sv); 373 I32 i = AvFILLp (padlist);
789 if (SvTYPE (hv) == SVt_PVHV) 374 while (i >= 0)
790 { 375 {
791 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 376 SV **svp = av_fetch (padlist, i--, FALSE);
792 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 377 if (svp)
378 {
379 SV *sv;
380 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
381 SvREFCNT_dec (sv);
793 382
794 prio = prio > PRIO_MAX ? PRIO_MAX 383 SvREFCNT_dec (*svp);
795 : prio < PRIO_MIN ? PRIO_MIN 384 }
796 : prio;
797
798 av_push (coro_ready [prio - PRIO_MIN], sv);
799
800 return;
801 } 385 }
386
387 SvREFCNT_dec ((SV*)padlist);
388 }
389}
390
391static int
392coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
393{
394 AV *padlist;
395 AV *av = (AV *)mg->mg_obj;
396
397 /* casting is fun. */
398 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
399 free_padlist (aTHX_ padlist);
400
401 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
402
403 return 0;
404}
405
406#define CORO_MAGIC_type_cv 26
407#define CORO_MAGIC_type_state PERL_MAGIC_ext
408
409static MGVTBL coro_cv_vtbl = {
410 0, 0, 0, 0,
411 coro_cv_free
412};
413
414#define CORO_MAGIC_NN(sv, type) \
415 (expect_true (SvMAGIC (sv)->mg_type == type) \
416 ? SvMAGIC (sv) \
417 : mg_find (sv, type))
418
419#define CORO_MAGIC(sv, type) \
420 (expect_true (SvMAGIC (sv)) \
421 ? CORO_MAGIC_NN (sv, type) \
422 : 0)
423
424#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
425#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
426
427INLINE struct coro *
428SvSTATE_ (pTHX_ SV *coro)
429{
430 HV *stash;
431 MAGIC *mg;
432
433 if (SvROK (coro))
434 coro = SvRV (coro);
435
436 if (expect_false (SvTYPE (coro) != SVt_PVHV))
437 croak ("Coro::State object required");
438
439 stash = SvSTASH (coro);
440 if (expect_false (stash != coro_stash && stash != coro_state_stash))
441 {
442 /* very slow, but rare, check */
443 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
444 croak ("Coro::State object required");
445 }
446
447 mg = CORO_MAGIC_state (coro);
448 return (struct coro *)mg->mg_ptr;
449}
450
451#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
452
453/* faster than SvSTATE, but expects a coroutine hv */
454#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
455#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
456
457/* the next two functions merely cache the padlists */
458static void
459get_padlist (pTHX_ CV *cv)
460{
461 MAGIC *mg = CORO_MAGIC_cv (cv);
462 AV *av;
463
464 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
465 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
466 else
467 {
468#if CORO_PREFER_PERL_FUNCTIONS
469 /* this is probably cleaner? but also slower! */
470 /* in practise, it seems to be less stable */
471 CV *cp = Perl_cv_clone (aTHX_ cv);
472 CvPADLIST (cv) = CvPADLIST (cp);
473 CvPADLIST (cp) = 0;
474 SvREFCNT_dec (cp);
475#else
476 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
477#endif
802 } 478 }
803
804 croak ("Coro::ready tried to enqueue something that is not a coroutine");
805} 479}
806 480
481static void
482put_padlist (pTHX_ CV *cv)
483{
484 MAGIC *mg = CORO_MAGIC_cv (cv);
485 AV *av;
486
487 if (expect_false (!mg))
488 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
489
490 av = (AV *)mg->mg_obj;
491
492 if (expect_false (AvFILLp (av) >= AvMAX (av)))
493 av_extend (av, AvMAX (av) + 1);
494
495 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
496}
497
498/** load & save, init *******************************************************/
499
500static void
501load_perl (pTHX_ Coro__State c)
502{
503 perl_slots *slot = c->slot;
504 c->slot = 0;
505
506 PL_mainstack = c->mainstack;
507
508 GvSV (PL_defgv) = slot->defsv;
509 GvAV (PL_defgv) = slot->defav;
510 GvSV (PL_errgv) = slot->errsv;
511 GvSV (irsgv) = slot->irsgv;
512
513 #define VAR(name,type) PL_ ## name = slot->name;
514 # include "state.h"
515 #undef VAR
516
517 {
518 dSP;
519
520 CV *cv;
521
522 /* now do the ugly restore mess */
523 while (expect_true (cv = (CV *)POPs))
524 {
525 put_padlist (aTHX_ cv); /* mark this padlist as available */
526 CvDEPTH (cv) = PTR2IV (POPs);
527 CvPADLIST (cv) = (AV *)POPs;
528 }
529
530 PUTBACK;
531 }
532
533 slf_frame = c->slf_frame;
534 CORO_THROW = c->except;
535}
536
537static void
538save_perl (pTHX_ Coro__State c)
539{
540 c->except = CORO_THROW;
541 c->slf_frame = slf_frame;
542
543 {
544 dSP;
545 I32 cxix = cxstack_ix;
546 PERL_CONTEXT *ccstk = cxstack;
547 PERL_SI *top_si = PL_curstackinfo;
548
549 /*
550 * the worst thing you can imagine happens first - we have to save
551 * (and reinitialize) all cv's in the whole callchain :(
552 */
553
554 XPUSHs (Nullsv);
555 /* this loop was inspired by pp_caller */
556 for (;;)
557 {
558 while (expect_true (cxix >= 0))
559 {
560 PERL_CONTEXT *cx = &ccstk[cxix--];
561
562 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
563 {
564 CV *cv = cx->blk_sub.cv;
565
566 if (expect_true (CvDEPTH (cv)))
567 {
568 EXTEND (SP, 3);
569 PUSHs ((SV *)CvPADLIST (cv));
570 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
571 PUSHs ((SV *)cv);
572
573 CvDEPTH (cv) = 0;
574 get_padlist (aTHX_ cv);
575 }
576 }
577 }
578
579 if (expect_true (top_si->si_type == PERLSI_MAIN))
580 break;
581
582 top_si = top_si->si_prev;
583 ccstk = top_si->si_cxstack;
584 cxix = top_si->si_cxix;
585 }
586
587 PUTBACK;
588 }
589
590 /* allocate some space on the context stack for our purposes */
591 /* we manually unroll here, as usually 2 slots is enough */
592 if (SLOT_COUNT >= 1) CXINC;
593 if (SLOT_COUNT >= 2) CXINC;
594 if (SLOT_COUNT >= 3) CXINC;
595 {
596 int i;
597 for (i = 3; i < SLOT_COUNT; ++i)
598 CXINC;
599 }
600 cxstack_ix -= SLOT_COUNT; /* undo allocation */
601
602 c->mainstack = PL_mainstack;
603
604 {
605 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
606
607 slot->defav = GvAV (PL_defgv);
608 slot->defsv = DEFSV;
609 slot->errsv = ERRSV;
610 slot->irsgv = GvSV (irsgv);
611
612 #define VAR(name,type) slot->name = PL_ ## name;
613 # include "state.h"
614 #undef VAR
615 }
616}
617
618/*
619 * allocate various perl stacks. This is almost an exact copy
620 * of perl.c:init_stacks, except that it uses less memory
621 * on the (sometimes correct) assumption that coroutines do
622 * not usually need a lot of stackspace.
623 */
624#if CORO_PREFER_PERL_FUNCTIONS
625# define coro_init_stacks(thx) init_stacks ()
626#else
627static void
628coro_init_stacks (pTHX)
629{
630 PL_curstackinfo = new_stackinfo(32, 8);
631 PL_curstackinfo->si_type = PERLSI_MAIN;
632 PL_curstack = PL_curstackinfo->si_stack;
633 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
634
635 PL_stack_base = AvARRAY(PL_curstack);
636 PL_stack_sp = PL_stack_base;
637 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
638
639 New(50,PL_tmps_stack,32,SV*);
640 PL_tmps_floor = -1;
641 PL_tmps_ix = -1;
642 PL_tmps_max = 32;
643
644 New(54,PL_markstack,16,I32);
645 PL_markstack_ptr = PL_markstack;
646 PL_markstack_max = PL_markstack + 16;
647
648#ifdef SET_MARK_OFFSET
649 SET_MARK_OFFSET;
650#endif
651
652 New(54,PL_scopestack,8,I32);
653 PL_scopestack_ix = 0;
654 PL_scopestack_max = 8;
655
656 New(54,PL_savestack,24,ANY);
657 PL_savestack_ix = 0;
658 PL_savestack_max = 24;
659
660#if !PERL_VERSION_ATLEAST (5,10,0)
661 New(54,PL_retstack,4,OP*);
662 PL_retstack_ix = 0;
663 PL_retstack_max = 4;
664#endif
665}
666#endif
667
668/*
669 * destroy the stacks, the callchain etc...
670 */
671static void
672coro_destruct_stacks (pTHX)
673{
674 while (PL_curstackinfo->si_next)
675 PL_curstackinfo = PL_curstackinfo->si_next;
676
677 while (PL_curstackinfo)
678 {
679 PERL_SI *p = PL_curstackinfo->si_prev;
680
681 if (!IN_DESTRUCT)
682 SvREFCNT_dec (PL_curstackinfo->si_stack);
683
684 Safefree (PL_curstackinfo->si_cxstack);
685 Safefree (PL_curstackinfo);
686 PL_curstackinfo = p;
687 }
688
689 Safefree (PL_tmps_stack);
690 Safefree (PL_markstack);
691 Safefree (PL_scopestack);
692 Safefree (PL_savestack);
693#if !PERL_VERSION_ATLEAST (5,10,0)
694 Safefree (PL_retstack);
695#endif
696}
697
698#define CORO_RSS \
699 rss += sizeof (SYM (curstackinfo)); \
700 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
701 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
702 rss += SYM (tmps_max) * sizeof (SV *); \
703 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
704 rss += SYM (scopestack_max) * sizeof (I32); \
705 rss += SYM (savestack_max) * sizeof (ANY);
706
707static size_t
708coro_rss (pTHX_ struct coro *coro)
709{
710 size_t rss = sizeof (*coro);
711
712 if (coro->mainstack)
713 {
714 if (coro->flags & CF_RUNNING)
715 {
716 #define SYM(sym) PL_ ## sym
717 CORO_RSS;
718 #undef SYM
719 }
720 else
721 {
722 #define SYM(sym) coro->slot->sym
723 CORO_RSS;
724 #undef SYM
725 }
726 }
727
728 return rss;
729}
730
731/** coroutine stack handling ************************************************/
732
733static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
734static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
735static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
736
737/* apparently < 5.8.8 */
738#ifndef MgPV_nolen_const
739#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
740 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
741 (const char*)(mg)->mg_ptr)
742#endif
743
744/*
745 * This overrides the default magic get method of %SIG elements.
746 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
747 * and instead of tryign to save and restore the hash elements, we just provide
748 * readback here.
749 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
750 * not expecting this to actually change the hook. This is a potential problem
751 * when a schedule happens then, but we ignore this.
752 */
753static int
754coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
755{
756 const char *s = MgPV_nolen_const (mg);
757
758 if (*s == '_')
759 {
760 SV **svp = 0;
761
762 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
763 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
764
765 if (svp)
766 {
767 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
768 return 0;
769 }
770 }
771
772 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
773}
774
775static int
776coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
777{
778 const char *s = MgPV_nolen_const (mg);
779
780 if (*s == '_')
781 {
782 SV **svp = 0;
783
784 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
785 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
786
787 if (svp)
788 {
789 SV *old = *svp;
790 *svp = 0;
791 SvREFCNT_dec (old);
792 return 0;
793 }
794 }
795
796 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
797}
798
799static int
800coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
801{
802 const char *s = MgPV_nolen_const (mg);
803
804 if (*s == '_')
805 {
806 SV **svp = 0;
807
808 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
809 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
810
811 if (svp)
812 {
813 SV *old = *svp;
814 *svp = newSVsv (sv);
815 SvREFCNT_dec (old);
816 return 0;
817 }
818 }
819
820 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
821}
822
823static void
824prepare_nop (pTHX_ struct coro_transfer_args *ta)
825{
826 /* kind of mega-hacky, but works */
827 ta->next = ta->prev = (struct coro *)ta;
828}
829
830static int
831slf_check_nop (pTHX_ struct CoroSLF *frame)
832{
833 return 0;
834}
835
836static UNOP coro_setup_op;
837
838static void NOINLINE /* noinline to keep it out of the transfer fast path */
839coro_setup (pTHX_ struct coro *coro)
840{
841 /*
842 * emulate part of the perl startup here.
843 */
844 coro_init_stacks (aTHX);
845
846 PL_runops = RUNOPS_DEFAULT;
847 PL_curcop = &PL_compiling;
848 PL_in_eval = EVAL_NULL;
849 PL_comppad = 0;
850 PL_curpm = 0;
851 PL_curpad = 0;
852 PL_localizing = 0;
853 PL_dirty = 0;
854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862
863 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
867 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
869
870 {
871 dSP;
872 UNOP myop;
873
874 Zero (&myop, 1, UNOP);
875 myop.op_next = Nullop;
876 myop.op_type = OP_ENTERSUB;
877 myop.op_flags = OPf_WANT_VOID;
878
879 PUSHMARK (SP);
880 PUSHs ((SV *)coro->startcv);
881 PUTBACK;
882 PL_op = (OP *)&myop;
883 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
884 }
885
886 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
888 */
889 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
890 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
891
892 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
893 coro_setup_op.op_next = PL_op;
894 coro_setup_op.op_type = OP_CUSTOM;
895 coro_setup_op.op_ppaddr = pp_slf;
896 /* no flags etc. required, as an init function won't be called */
897
898 PL_op = (OP *)&coro_setup_op;
899
900 /* copy throw, in case it was set before coro_setup */
901 CORO_THROW = coro->except;
902}
903
904static void
905coro_destruct (pTHX_ struct coro *coro)
906{
907 if (!IN_DESTRUCT)
908 {
909 /* restore all saved variables and stuff */
910 LEAVE_SCOPE (0);
911 assert (PL_tmps_floor == -1);
912
913 /* free all temporaries */
914 FREETMPS;
915 assert (PL_tmps_ix == -1);
916
917 /* unwind all extra stacks */
918 POPSTACK_TO (PL_mainstack);
919
920 /* unwind main stack */
921 dounwind (-1);
922 }
923
924 SvREFCNT_dec (GvSV (PL_defgv));
925 SvREFCNT_dec (GvAV (PL_defgv));
926 SvREFCNT_dec (GvSV (PL_errgv));
927 SvREFCNT_dec (PL_defoutgv);
928 SvREFCNT_dec (PL_rs);
929 SvREFCNT_dec (GvSV (irsgv));
930
931 SvREFCNT_dec (PL_diehook);
932 SvREFCNT_dec (PL_warnhook);
933
934 SvREFCNT_dec (coro->saved_deffh);
935 SvREFCNT_dec (coro->rouse_cb);
936 SvREFCNT_dec (coro->invoke_cb);
937 SvREFCNT_dec (coro->invoke_av);
938
939 coro_destruct_stacks (aTHX);
940}
941
942INLINE void
943free_coro_mortal (pTHX)
944{
945 if (expect_true (coro_mortal))
946 {
947 SvREFCNT_dec (coro_mortal);
948 coro_mortal = 0;
949 }
950}
951
952static int
953runops_trace (pTHX)
954{
955 COP *oldcop = 0;
956 int oldcxix = -2;
957 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
958 coro_cctx *cctx = coro->cctx;
959
960 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
961 {
962 PERL_ASYNC_CHECK ();
963
964 if (cctx->flags & CC_TRACE_ALL)
965 {
966 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
967 {
968 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
969 SV **bot, **top;
970 AV *av = newAV (); /* return values */
971 SV **cb;
972 dSP;
973
974 GV *gv = CvGV (cx->blk_sub.cv);
975 SV *fullname = sv_2mortal (newSV (0));
976 if (isGV (gv))
977 gv_efullname3 (fullname, gv, 0);
978
979 bot = PL_stack_base + cx->blk_oldsp + 1;
980 top = cx->blk_gimme == G_ARRAY ? SP + 1
981 : cx->blk_gimme == G_SCALAR ? bot + 1
982 : bot;
983
984 av_extend (av, top - bot);
985 while (bot < top)
986 av_push (av, SvREFCNT_inc_NN (*bot++));
987
988 PL_runops = RUNOPS_DEFAULT;
989 ENTER;
990 SAVETMPS;
991 EXTEND (SP, 3);
992 PUSHMARK (SP);
993 PUSHs (&PL_sv_no);
994 PUSHs (fullname);
995 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
996 PUTBACK;
997 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
998 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
999 SPAGAIN;
1000 FREETMPS;
1001 LEAVE;
1002 PL_runops = runops_trace;
1003 }
1004
1005 if (oldcop != PL_curcop)
1006 {
1007 oldcop = PL_curcop;
1008
1009 if (PL_curcop != &PL_compiling)
1010 {
1011 SV **cb;
1012
1013 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1014 {
1015 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1016
1017 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1018 {
1019 runops_proc_t old_runops = PL_runops;
1020 dSP;
1021 GV *gv = CvGV (cx->blk_sub.cv);
1022 SV *fullname = sv_2mortal (newSV (0));
1023
1024 if (isGV (gv))
1025 gv_efullname3 (fullname, gv, 0);
1026
1027 PL_runops = RUNOPS_DEFAULT;
1028 ENTER;
1029 SAVETMPS;
1030 EXTEND (SP, 3);
1031 PUSHMARK (SP);
1032 PUSHs (&PL_sv_yes);
1033 PUSHs (fullname);
1034 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1035 PUTBACK;
1036 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1037 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1038 SPAGAIN;
1039 FREETMPS;
1040 LEAVE;
1041 PL_runops = runops_trace;
1042 }
1043
1044 oldcxix = cxstack_ix;
1045 }
1046
1047 if (cctx->flags & CC_TRACE_LINE)
1048 {
1049 dSP;
1050
1051 PL_runops = RUNOPS_DEFAULT;
1052 ENTER;
1053 SAVETMPS;
1054 EXTEND (SP, 3);
1055 PL_runops = RUNOPS_DEFAULT;
1056 PUSHMARK (SP);
1057 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1058 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1059 PUTBACK;
1060 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1061 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1062 SPAGAIN;
1063 FREETMPS;
1064 LEAVE;
1065 PL_runops = runops_trace;
1066 }
1067 }
1068 }
1069 }
1070 }
1071
1072 TAINT_NOT;
1073 return 0;
1074}
1075
1076static struct coro_cctx *cctx_ssl_cctx;
1077static struct CoroSLF cctx_ssl_frame;
1078
1079static void
1080slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1081{
1082 ta->prev = (struct coro *)cctx_ssl_cctx;
1083 ta->next = 0;
1084}
1085
1086static int
1087slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1088{
1089 *frame = cctx_ssl_frame;
1090
1091 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1092}
1093
1094/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1095static void NOINLINE
1096cctx_prepare (pTHX_ coro_cctx *cctx)
1097{
1098 PL_top_env = &PL_start_env;
1099
1100 if (cctx->flags & CC_TRACE)
1101 PL_runops = runops_trace;
1102
1103 /* we already must be executing an SLF op, there is no other valid way
1104 * that can lead to creation of a new cctx */
1105 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1106 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1107
1108 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1109 cctx_ssl_cctx = cctx;
1110 cctx_ssl_frame = slf_frame;
1111
1112 slf_frame.prepare = slf_prepare_set_stacklevel;
1113 slf_frame.check = slf_check_set_stacklevel;
1114}
1115
1116/* the tail of transfer: execute stuff we can only do after a transfer */
1117INLINE void
1118transfer_tail (pTHX)
1119{
1120 free_coro_mortal (aTHX);
1121}
1122
1123/*
1124 * this is a _very_ stripped down perl interpreter ;)
1125 */
1126static void
1127cctx_run (void *arg)
1128{
1129#ifdef USE_ITHREADS
1130# if CORO_PTHREAD
1131 PERL_SET_CONTEXT (coro_thx);
1132# endif
1133#endif
1134 {
1135 dTHX;
1136
1137 /* normally we would need to skip the entersub here */
1138 /* not doing so will re-execute it, which is exactly what we want */
1139 /* PL_nop = PL_nop->op_next */
1140
1141 /* inject a fake subroutine call to cctx_init */
1142 cctx_prepare (aTHX_ (coro_cctx *)arg);
1143
1144 /* cctx_run is the alternative tail of transfer() */
1145 transfer_tail (aTHX);
1146
1147 /* somebody or something will hit me for both perl_run and PL_restartop */
1148 PL_restartop = PL_op;
1149 perl_run (PL_curinterp);
1150 /*
1151 * Unfortunately, there is no way to get at the return values of the
1152 * coro body here, as perl_run destroys these
1153 */
1154
1155 /*
1156 * If perl-run returns we assume exit() was being called or the coro
1157 * fell off the end, which seems to be the only valid (non-bug)
1158 * reason for perl_run to return. We try to exit by jumping to the
1159 * bootstrap-time "top" top_env, as we cannot restore the "main"
1160 * coroutine as Coro has no such concept
1161 */
1162 PL_top_env = main_top_env;
1163 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1164 }
1165}
1166
1167static coro_cctx *
1168cctx_new ()
1169{
1170 coro_cctx *cctx;
1171
1172 ++cctx_count;
1173 New (0, cctx, 1, coro_cctx);
1174
1175 cctx->gen = cctx_gen;
1176 cctx->flags = 0;
1177 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1178
1179 return cctx;
1180}
1181
1182/* create a new cctx only suitable as source */
1183static coro_cctx *
1184cctx_new_empty ()
1185{
1186 coro_cctx *cctx = cctx_new ();
1187
1188 cctx->sptr = 0;
1189 coro_create (&cctx->cctx, 0, 0, 0, 0);
1190
1191 return cctx;
1192}
1193
1194/* create a new cctx suitable as destination/running a perl interpreter */
1195static coro_cctx *
1196cctx_new_run ()
1197{
1198 coro_cctx *cctx = cctx_new ();
1199 void *stack_start;
1200 size_t stack_size;
1201
1202#if HAVE_MMAP
1203 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1204 /* mmap supposedly does allocate-on-write for us */
1205 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1206
1207 if (cctx->sptr != (void *)-1)
1208 {
1209 #if CORO_STACKGUARD
1210 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1211 #endif
1212 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1213 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1214 cctx->flags |= CC_MAPPED;
1215 }
1216 else
1217#endif
1218 {
1219 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1220 New (0, cctx->sptr, cctx_stacksize, long);
1221
1222 if (!cctx->sptr)
1223 {
1224 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1225 _exit (EXIT_FAILURE);
1226 }
1227
1228 stack_start = cctx->sptr;
1229 stack_size = cctx->ssize;
1230 }
1231
1232 #if CORO_USE_VALGRIND
1233 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1234 #endif
1235
1236 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1237
1238 return cctx;
1239}
1240
1241static void
1242cctx_destroy (coro_cctx *cctx)
1243{
1244 if (!cctx)
1245 return;
1246
1247 --cctx_count;
1248 coro_destroy (&cctx->cctx);
1249
1250 /* coro_transfer creates new, empty cctx's */
1251 if (cctx->sptr)
1252 {
1253 #if CORO_USE_VALGRIND
1254 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1255 #endif
1256
1257#if HAVE_MMAP
1258 if (cctx->flags & CC_MAPPED)
1259 munmap (cctx->sptr, cctx->ssize);
1260 else
1261#endif
1262 Safefree (cctx->sptr);
1263 }
1264
1265 Safefree (cctx);
1266}
1267
1268/* wether this cctx should be destructed */
1269#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1270
1271static coro_cctx *
1272cctx_get (pTHX)
1273{
1274 while (expect_true (cctx_first))
1275 {
1276 coro_cctx *cctx = cctx_first;
1277 cctx_first = cctx->next;
1278 --cctx_idle;
1279
1280 if (expect_true (!CCTX_EXPIRED (cctx)))
1281 return cctx;
1282
1283 cctx_destroy (cctx);
1284 }
1285
1286 return cctx_new_run ();
1287}
1288
1289static void
1290cctx_put (coro_cctx *cctx)
1291{
1292 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1293
1294 /* free another cctx if overlimit */
1295 if (expect_false (cctx_idle >= cctx_max_idle))
1296 {
1297 coro_cctx *first = cctx_first;
1298 cctx_first = first->next;
1299 --cctx_idle;
1300
1301 cctx_destroy (first);
1302 }
1303
1304 ++cctx_idle;
1305 cctx->next = cctx_first;
1306 cctx_first = cctx;
1307}
1308
1309/** coroutine switching *****************************************************/
1310
1311static void
1312transfer_check (pTHX_ struct coro *prev, struct coro *next)
1313{
1314 /* TODO: throwing up here is considered harmful */
1315
1316 if (expect_true (prev != next))
1317 {
1318 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1319 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1320
1321 if (expect_false (next->flags & CF_RUNNING))
1322 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1323
1324 if (expect_false (next->flags & CF_DESTROYED))
1325 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1326
1327#if !PERL_VERSION_ATLEAST (5,10,0)
1328 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1329 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1330#endif
1331 }
1332}
1333
1334/* always use the TRANSFER macro */
1335static void NOINLINE /* noinline so we have a fixed stackframe */
1336transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1337{
1338 dSTACKLEVEL;
1339
1340 /* sometimes transfer is only called to set idle_sp */
1341 if (expect_false (!next))
1342 {
1343 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1344 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1345 }
1346 else if (expect_true (prev != next))
1347 {
1348 coro_cctx *prev__cctx;
1349
1350 if (expect_false (prev->flags & CF_NEW))
1351 {
1352 /* create a new empty/source context */
1353 prev->cctx = cctx_new_empty ();
1354 prev->flags &= ~CF_NEW;
1355 prev->flags |= CF_RUNNING;
1356 }
1357
1358 prev->flags &= ~CF_RUNNING;
1359 next->flags |= CF_RUNNING;
1360
1361 /* first get rid of the old state */
1362 save_perl (aTHX_ prev);
1363
1364 if (expect_false (next->flags & CF_NEW))
1365 {
1366 /* need to start coroutine */
1367 next->flags &= ~CF_NEW;
1368 /* setup coroutine call */
1369 coro_setup (aTHX_ next);
1370 }
1371 else
1372 load_perl (aTHX_ next);
1373
1374 prev__cctx = prev->cctx;
1375
1376 /* possibly untie and reuse the cctx */
1377 if (expect_true (
1378 prev__cctx->idle_sp == STACKLEVEL
1379 && !(prev__cctx->flags & CC_TRACE)
1380 && !force_cctx
1381 ))
1382 {
1383 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1384 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1385
1386 prev->cctx = 0;
1387
1388 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1389 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1390 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1391 if (!next->cctx)
1392 next->cctx = cctx_get (aTHX);
1393
1394 cctx_put (prev__cctx);
1395 }
1396
1397 ++next->usecount;
1398
1399 if (expect_true (!next->cctx))
1400 next->cctx = cctx_get (aTHX);
1401
1402 if (expect_false (prev__cctx != next->cctx))
1403 {
1404 prev__cctx->top_env = PL_top_env;
1405 PL_top_env = next->cctx->top_env;
1406 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1407 }
1408
1409 transfer_tail (aTHX);
1410 }
1411}
1412
1413#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1414#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1415
1416/** high level stuff ********************************************************/
1417
1418static int
1419coro_state_destroy (pTHX_ struct coro *coro)
1420{
1421 if (coro->flags & CF_DESTROYED)
1422 return 0;
1423
1424 if (coro->on_destroy)
1425 coro->on_destroy (aTHX_ coro);
1426
1427 coro->flags |= CF_DESTROYED;
1428
1429 if (coro->flags & CF_READY)
1430 {
1431 /* reduce nready, as destroying a ready coro effectively unreadies it */
1432 /* alternative: look through all ready queues and remove the coro */
1433 --coro_nready;
1434 }
1435 else
1436 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1437
1438 if (coro->mainstack && coro->mainstack != main_mainstack)
1439 {
1440 struct coro temp;
1441
1442 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1443
1444 save_perl (aTHX_ &temp);
1445 load_perl (aTHX_ coro);
1446
1447 coro_destruct (aTHX_ coro);
1448
1449 load_perl (aTHX_ &temp);
1450
1451 coro->slot = 0;
1452 }
1453
1454 cctx_destroy (coro->cctx);
1455 SvREFCNT_dec (coro->startcv);
1456 SvREFCNT_dec (coro->args);
1457 SvREFCNT_dec (CORO_THROW);
1458
1459 if (coro->next) coro->next->prev = coro->prev;
1460 if (coro->prev) coro->prev->next = coro->next;
1461 if (coro == coro_first) coro_first = coro->next;
1462
1463 return 1;
1464}
1465
1466static int
1467coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1468{
1469 struct coro *coro = (struct coro *)mg->mg_ptr;
1470 mg->mg_ptr = 0;
1471
1472 coro->hv = 0;
1473
1474 if (--coro->refcnt < 0)
1475 {
1476 coro_state_destroy (aTHX_ coro);
1477 Safefree (coro);
1478 }
1479
1480 return 0;
1481}
1482
1483static int
1484coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1485{
1486 struct coro *coro = (struct coro *)mg->mg_ptr;
1487
1488 ++coro->refcnt;
1489
1490 return 0;
1491}
1492
1493static MGVTBL coro_state_vtbl = {
1494 0, 0, 0, 0,
1495 coro_state_free,
1496 0,
1497#ifdef MGf_DUP
1498 coro_state_dup,
1499#else
1500# define MGf_DUP 0
1501#endif
1502};
1503
1504static void
1505prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1506{
1507 ta->prev = SvSTATE (prev_sv);
1508 ta->next = SvSTATE (next_sv);
1509 TRANSFER_CHECK (*ta);
1510}
1511
1512static void
1513api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1514{
1515 struct coro_transfer_args ta;
1516
1517 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1518 TRANSFER (ta, 1);
1519}
1520
1521/*****************************************************************************/
1522/* gensub: simple closure generation utility */
1523
1524#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1525
1526/* create a closure from XS, returns a code reference */
1527/* the arg can be accessed via GENSUB_ARG from the callback */
1528/* the callback must use dXSARGS/XSRETURN */
807static SV * 1529static SV *
808coro_deq (int min_prio) 1530gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
809{ 1531{
810 int prio = PRIO_MAX - PRIO_MIN; 1532 CV *cv = (CV *)newSV (0);
811 1533
812 min_prio -= PRIO_MIN; 1534 sv_upgrade ((SV *)cv, SVt_PVCV);
813 if (min_prio < 0)
814 min_prio = 0;
815 1535
1536 CvANON_on (cv);
1537 CvISXSUB_on (cv);
1538 CvXSUB (cv) = xsub;
1539 GENSUB_ARG = arg;
1540
1541 return newRV_noinc ((SV *)cv);
1542}
1543
1544/** Coro ********************************************************************/
1545
1546INLINE void
1547coro_enq (pTHX_ struct coro *coro)
1548{
1549 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1550}
1551
1552INLINE SV *
1553coro_deq (pTHX)
1554{
1555 int prio;
1556
816 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1557 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
817 if (av_len (coro_ready[prio]) >= 0) 1558 if (AvFILLp (coro_ready [prio]) >= 0)
818 return av_shift (coro_ready[prio]); 1559 return av_shift (coro_ready [prio]);
819 1560
820 return 0; 1561 return 0;
821} 1562}
822 1563
823static void 1564static int
824api_ready (SV *coro) 1565api_ready (pTHX_ SV *coro_sv)
825{ 1566{
826 coro_enq (SvREFCNT_inc (coro)); 1567 struct coro *coro;
827} 1568 SV *sv_hook;
1569 void (*xs_hook)(void);
828 1570
1571 if (SvROK (coro_sv))
1572 coro_sv = SvRV (coro_sv);
1573
1574 coro = SvSTATE (coro_sv);
1575
1576 if (coro->flags & CF_READY)
1577 return 0;
1578
1579 coro->flags |= CF_READY;
1580
1581 sv_hook = coro_nready ? 0 : coro_readyhook;
1582 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1583
1584 coro_enq (aTHX_ coro);
1585 ++coro_nready;
1586
1587 if (sv_hook)
1588 {
1589 dSP;
1590
1591 ENTER;
1592 SAVETMPS;
1593
1594 PUSHMARK (SP);
1595 PUTBACK;
1596 call_sv (sv_hook, G_VOID | G_DISCARD);
1597
1598 FREETMPS;
1599 LEAVE;
1600 }
1601
1602 if (xs_hook)
1603 xs_hook ();
1604
1605 return 1;
1606}
1607
829static void 1608static int
830api_schedule (int cede) 1609api_is_ready (pTHX_ SV *coro_sv)
831{ 1610{
1611 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1612}
1613
1614INLINE void
1615prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1616{
832 SV *prev, *next; 1617 SV *prev_sv, *next_sv;
833 1618
1619 for (;;)
1620 {
1621 next_sv = coro_deq (aTHX);
1622
1623 /* nothing to schedule: call the idle handler */
1624 if (expect_false (!next_sv))
1625 {
1626 dSP;
1627
1628 ENTER;
1629 SAVETMPS;
1630
1631 PUSHMARK (SP);
1632 PUTBACK;
1633 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1634
1635 FREETMPS;
1636 LEAVE;
1637 continue;
1638 }
1639
1640 ta->next = SvSTATE_hv (next_sv);
1641
1642 /* cannot transfer to destroyed coros, skip and look for next */
1643 if (expect_false (ta->next->flags & CF_DESTROYED))
1644 {
1645 SvREFCNT_dec (next_sv);
1646 /* coro_nready has already been taken care of by destroy */
1647 continue;
1648 }
1649
1650 --coro_nready;
1651 break;
1652 }
1653
1654 /* free this only after the transfer */
834 prev = GvSV (coro_current); 1655 prev_sv = SvRV (coro_current);
1656 ta->prev = SvSTATE_hv (prev_sv);
1657 TRANSFER_CHECK (*ta);
1658 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1659 ta->next->flags &= ~CF_READY;
1660 SvRV_set (coro_current, next_sv);
835 1661
836 if (cede) 1662 free_coro_mortal (aTHX);
837 coro_enq (SvREFCNT_inc (prev)); 1663 coro_mortal = prev_sv;
1664}
838 1665
839 next = coro_deq (PRIO_MIN); 1666INLINE void
1667prepare_cede (pTHX_ struct coro_transfer_args *ta)
1668{
1669 api_ready (aTHX_ coro_current);
1670 prepare_schedule (aTHX_ ta);
1671}
840 1672
841 if (!next) 1673INLINE void
842 next = SvREFCNT_inc (GvSV (coro_idle)); 1674prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1675{
1676 SV *prev = SvRV (coro_current);
843 1677
844 GvSV (coro_current) = SvREFCNT_inc (next); 1678 if (coro_nready)
845 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 1679 {
846 sv_to_coro (next, "Coro::schedule", "next coroutine"), 1680 prepare_schedule (aTHX_ ta);
847 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1681 api_ready (aTHX_ prev);
1682 }
1683 else
1684 prepare_nop (aTHX_ ta);
1685}
1686
1687static void
1688api_schedule (pTHX)
1689{
1690 struct coro_transfer_args ta;
1691
1692 prepare_schedule (aTHX_ &ta);
1693 TRANSFER (ta, 1);
1694}
1695
1696static int
1697api_cede (pTHX)
1698{
1699 struct coro_transfer_args ta;
1700
1701 prepare_cede (aTHX_ &ta);
1702
1703 if (expect_true (ta.prev != ta.next))
1704 {
1705 TRANSFER (ta, 1);
1706 return 1;
1707 }
1708 else
1709 return 0;
1710}
1711
1712static int
1713api_cede_notself (pTHX)
1714{
1715 if (coro_nready)
1716 {
1717 struct coro_transfer_args ta;
1718
1719 prepare_cede_notself (aTHX_ &ta);
1720 TRANSFER (ta, 1);
1721 return 1;
1722 }
1723 else
1724 return 0;
1725}
1726
1727static void
1728api_trace (pTHX_ SV *coro_sv, int flags)
1729{
1730 struct coro *coro = SvSTATE (coro_sv);
1731
1732 if (flags & CC_TRACE)
1733 {
1734 if (!coro->cctx)
1735 coro->cctx = cctx_new_run ();
1736 else if (!(coro->cctx->flags & CC_TRACE))
1737 croak ("cannot enable tracing on coroutine with custom stack,");
1738
1739 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1740 }
1741 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1742 {
1743 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1744
1745 if (coro->flags & CF_RUNNING)
1746 PL_runops = RUNOPS_DEFAULT;
1747 else
1748 coro->slot->runops = RUNOPS_DEFAULT;
1749 }
1750}
1751
1752/*****************************************************************************/
1753/* async pool handler */
1754
1755static int
1756slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1757{
1758 HV *hv = (HV *)SvRV (coro_current);
1759 struct coro *coro = (struct coro *)frame->data;
1760
1761 if (!coro->invoke_cb)
1762 return 1; /* loop till we have invoke */
1763 else
1764 {
1765 hv_store (hv, "desc", sizeof ("desc") - 1,
1766 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1767
1768 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1769
1770 {
1771 dSP;
1772 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1773 PUTBACK;
1774 }
1775
1776 SvREFCNT_dec (GvAV (PL_defgv));
1777 GvAV (PL_defgv) = coro->invoke_av;
1778 coro->invoke_av = 0;
1779
1780 return 0;
1781 }
1782}
1783
1784static void
1785slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1786{
1787 HV *hv = (HV *)SvRV (coro_current);
1788 struct coro *coro = SvSTATE_hv ((SV *)hv);
1789
1790 if (expect_true (coro->saved_deffh))
1791 {
1792 /* subsequent iteration */
1793 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1794 coro->saved_deffh = 0;
1795
1796 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1797 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1798 {
1799 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1800 coro->invoke_av = newAV ();
1801
1802 frame->prepare = prepare_nop;
1803 }
1804 else
1805 {
1806 av_clear (GvAV (PL_defgv));
1807 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1808
1809 coro->prio = 0;
1810
1811 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1812 api_trace (aTHX_ coro_current, 0);
1813
1814 frame->prepare = prepare_schedule;
1815 av_push (av_async_pool, SvREFCNT_inc (hv));
1816 }
1817 }
1818 else
1819 {
1820 /* first iteration, simply fall through */
1821 frame->prepare = prepare_nop;
1822 }
1823
1824 frame->check = slf_check_pool_handler;
1825 frame->data = (void *)coro;
1826}
1827
1828/*****************************************************************************/
1829/* rouse callback */
1830
1831#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1832
1833static void
1834coro_rouse_callback (pTHX_ CV *cv)
1835{
1836 dXSARGS;
1837 SV *data = (SV *)GENSUB_ARG;
1838
1839 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1840 {
1841 /* first call, set args */
1842 AV *av = newAV ();
1843 SV *coro = SvRV (data);
1844
1845 SvRV_set (data, (SV *)av);
1846 api_ready (aTHX_ coro);
1847 SvREFCNT_dec (coro);
1848
1849 /* better take a full copy of the arguments */
1850 while (items--)
1851 av_store (av, items, newSVsv (ST (items)));
1852 }
1853
1854 XSRETURN_EMPTY;
1855}
1856
1857static int
1858slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1859{
1860 SV *data = (SV *)frame->data;
1861
1862 if (CORO_THROW)
1863 return 0;
1864
1865 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1866 return 1;
1867
1868 /* now push all results on the stack */
1869 {
1870 dSP;
1871 AV *av = (AV *)SvRV (data);
1872 int i;
1873
1874 EXTEND (SP, AvFILLp (av) + 1);
1875 for (i = 0; i <= AvFILLp (av); ++i)
1876 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1877
1878 /* we have stolen the elements, so ste length to zero and free */
1879 AvFILLp (av) = -1;
1880 av_undef (av);
1881
1882 PUTBACK;
1883 }
1884
1885 return 0;
1886}
1887
1888static void
1889slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1890{
1891 SV *cb;
1892
1893 if (items)
1894 cb = arg [0];
1895 else
1896 {
1897 struct coro *coro = SvSTATE_current;
1898
1899 if (!coro->rouse_cb)
1900 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1901
1902 cb = sv_2mortal (coro->rouse_cb);
1903 coro->rouse_cb = 0;
1904 }
1905
1906 if (!SvROK (cb)
1907 || SvTYPE (SvRV (cb)) != SVt_PVCV
1908 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1909 croak ("Coro::rouse_wait called with illegal callback argument,");
1910
1911 {
1912 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1913 SV *data = (SV *)GENSUB_ARG;
1914
1915 frame->data = (void *)data;
1916 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1917 frame->check = slf_check_rouse_wait;
1918 }
1919}
1920
1921static SV *
1922coro_new_rouse_cb (pTHX)
1923{
1924 HV *hv = (HV *)SvRV (coro_current);
1925 struct coro *coro = SvSTATE_hv (hv);
1926 SV *data = newRV_inc ((SV *)hv);
1927 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1928
1929 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1930 SvREFCNT_dec (data); /* magicext increases the refcount */
1931
1932 SvREFCNT_dec (coro->rouse_cb);
1933 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1934
1935 return cb;
1936}
1937
1938/*****************************************************************************/
1939/* schedule-like-function opcode (SLF) */
1940
1941static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1942static const CV *slf_cv;
1943static SV **slf_argv;
1944static int slf_argc, slf_arga; /* count, allocated */
1945static I32 slf_ax; /* top of stack, for restore */
1946
1947/* this restores the stack in the case we patched the entersub, to */
1948/* recreate the stack frame as perl will on following calls */
1949/* since entersub cleared the stack */
1950static OP *
1951pp_restore (pTHX)
1952{
1953 int i;
1954 SV **SP = PL_stack_base + slf_ax;
1955
1956 PUSHMARK (SP);
1957
1958 EXTEND (SP, slf_argc + 1);
1959
1960 for (i = 0; i < slf_argc; ++i)
1961 PUSHs (sv_2mortal (slf_argv [i]));
1962
1963 PUSHs ((SV *)CvGV (slf_cv));
1964
1965 RETURNOP (slf_restore.op_first);
1966}
1967
1968static void
1969slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1970{
1971 SV **arg = (SV **)slf_frame.data;
1972
1973 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1974}
1975
1976static void
1977slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1978{
1979 if (items != 2)
1980 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1981
1982 frame->prepare = slf_prepare_transfer;
1983 frame->check = slf_check_nop;
1984 frame->data = (void *)arg; /* let's hope it will stay valid */
1985}
1986
1987static void
1988slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1989{
1990 frame->prepare = prepare_schedule;
1991 frame->check = slf_check_nop;
1992}
1993
1994static void
1995slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1996{
1997 frame->prepare = prepare_cede;
1998 frame->check = slf_check_nop;
1999}
2000
2001static void
2002slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2003{
2004 frame->prepare = prepare_cede_notself;
2005 frame->check = slf_check_nop;
2006}
2007
2008/*
2009 * these not obviously related functions are all rolled into one
2010 * function to increase chances that they all will call transfer with the same
2011 * stack offset
2012 * SLF stands for "schedule-like-function".
2013 */
2014static OP *
2015pp_slf (pTHX)
2016{
2017 I32 checkmark; /* mark SP to see how many elements check has pushed */
2018
2019 /* set up the slf frame, unless it has already been set-up */
2020 /* the latter happens when a new coro has been started */
2021 /* or when a new cctx was attached to an existing coroutine */
2022 if (expect_true (!slf_frame.prepare))
2023 {
2024 /* first iteration */
2025 dSP;
2026 SV **arg = PL_stack_base + TOPMARK + 1;
2027 int items = SP - arg; /* args without function object */
2028 SV *gv = *sp;
2029
2030 /* do a quick consistency check on the "function" object, and if it isn't */
2031 /* for us, divert to the real entersub */
2032 if (SvTYPE (gv) != SVt_PVGV
2033 || !GvCV (gv)
2034 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2035 return PL_ppaddr[OP_ENTERSUB](aTHX);
2036
2037 if (!(PL_op->op_flags & OPf_STACKED))
2038 {
2039 /* ampersand-form of call, use @_ instead of stack */
2040 AV *av = GvAV (PL_defgv);
2041 arg = AvARRAY (av);
2042 items = AvFILLp (av) + 1;
2043 }
2044
2045 /* now call the init function, which needs to set up slf_frame */
2046 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2047 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2048
2049 /* pop args */
2050 SP = PL_stack_base + POPMARK;
2051
2052 PUTBACK;
2053 }
2054
2055 /* now that we have a slf_frame, interpret it! */
2056 /* we use a callback system not to make the code needlessly */
2057 /* complicated, but so we can run multiple perl coros from one cctx */
2058
2059 do
2060 {
2061 struct coro_transfer_args ta;
2062
2063 slf_frame.prepare (aTHX_ &ta);
2064 TRANSFER (ta, 0);
2065
2066 checkmark = PL_stack_sp - PL_stack_base;
2067 }
2068 while (slf_frame.check (aTHX_ &slf_frame));
2069
2070 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2071
2072 /* exception handling */
2073 if (expect_false (CORO_THROW))
2074 {
2075 SV *exception = sv_2mortal (CORO_THROW);
2076
2077 CORO_THROW = 0;
2078 sv_setsv (ERRSV, exception);
2079 croak (0);
2080 }
2081
2082 /* return value handling - mostly like entersub */
2083 /* make sure we put something on the stack in scalar context */
2084 if (GIMME_V == G_SCALAR)
2085 {
2086 dSP;
2087 SV **bot = PL_stack_base + checkmark;
2088
2089 if (sp == bot) /* too few, push undef */
2090 bot [1] = &PL_sv_undef;
2091 else if (sp != bot + 1) /* too many, take last one */
2092 bot [1] = *sp;
2093
2094 SP = bot + 1;
2095
2096 PUTBACK;
2097 }
2098
2099 return NORMAL;
2100}
2101
2102static void
2103api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2104{
2105 int i;
2106 SV **arg = PL_stack_base + ax;
2107 int items = PL_stack_sp - arg + 1;
2108
2109 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2110
2111 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2112 && PL_op->op_ppaddr != pp_slf)
2113 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2114
2115 CvFLAGS (cv) |= CVf_SLF;
2116 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2117 slf_cv = cv;
2118
2119 /* we patch the op, and then re-run the whole call */
2120 /* we have to put the same argument on the stack for this to work */
2121 /* and this will be done by pp_restore */
2122 slf_restore.op_next = (OP *)&slf_restore;
2123 slf_restore.op_type = OP_CUSTOM;
2124 slf_restore.op_ppaddr = pp_restore;
2125 slf_restore.op_first = PL_op;
2126
2127 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2128
2129 if (PL_op->op_flags & OPf_STACKED)
2130 {
2131 if (items > slf_arga)
2132 {
2133 slf_arga = items;
2134 free (slf_argv);
2135 slf_argv = malloc (slf_arga * sizeof (SV *));
2136 }
2137
2138 slf_argc = items;
2139
2140 for (i = 0; i < items; ++i)
2141 slf_argv [i] = SvREFCNT_inc (arg [i]);
2142 }
2143 else
2144 slf_argc = 0;
2145
2146 PL_op->op_ppaddr = pp_slf;
2147 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2148
2149 PL_op = (OP *)&slf_restore;
2150}
2151
2152/*****************************************************************************/
2153/* PerlIO::cede */
2154
2155typedef struct
2156{
2157 PerlIOBuf base;
2158 NV next, every;
2159} PerlIOCede;
2160
2161static IV
2162PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2163{
2164 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2165
2166 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2167 self->next = nvtime () + self->every;
2168
2169 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2170}
2171
2172static SV *
2173PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2174{
2175 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2176
2177 return newSVnv (self->every);
2178}
2179
2180static IV
2181PerlIOCede_flush (pTHX_ PerlIO *f)
2182{
2183 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2184 double now = nvtime ();
2185
2186 if (now >= self->next)
2187 {
2188 api_cede (aTHX);
2189 self->next = now + self->every;
2190 }
2191
2192 return PerlIOBuf_flush (aTHX_ f);
2193}
2194
2195static PerlIO_funcs PerlIO_cede =
2196{
2197 sizeof(PerlIO_funcs),
2198 "cede",
2199 sizeof(PerlIOCede),
2200 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2201 PerlIOCede_pushed,
2202 PerlIOBuf_popped,
2203 PerlIOBuf_open,
2204 PerlIOBase_binmode,
2205 PerlIOCede_getarg,
2206 PerlIOBase_fileno,
2207 PerlIOBuf_dup,
2208 PerlIOBuf_read,
2209 PerlIOBuf_unread,
2210 PerlIOBuf_write,
2211 PerlIOBuf_seek,
2212 PerlIOBuf_tell,
2213 PerlIOBuf_close,
2214 PerlIOCede_flush,
2215 PerlIOBuf_fill,
2216 PerlIOBase_eof,
2217 PerlIOBase_error,
2218 PerlIOBase_clearerr,
2219 PerlIOBase_setlinebuf,
2220 PerlIOBuf_get_base,
2221 PerlIOBuf_bufsiz,
2222 PerlIOBuf_get_ptr,
2223 PerlIOBuf_get_cnt,
2224 PerlIOBuf_set_ptrcnt,
2225};
2226
2227/*****************************************************************************/
2228/* Coro::Semaphore & Coro::Signal */
2229
2230static SV *
2231coro_waitarray_new (pTHX_ int count)
2232{
2233 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2234 AV *av = newAV ();
2235 SV **ary;
2236
2237 /* unfortunately, building manually saves memory */
2238 Newx (ary, 2, SV *);
2239 AvALLOC (av) = ary;
2240 /*AvARRAY (av) = ary;*/
2241 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2242 AvMAX (av) = 1;
2243 AvFILLp (av) = 0;
2244 ary [0] = newSViv (count);
2245
2246 return newRV_noinc ((SV *)av);
2247}
2248
2249/* semaphore */
2250
2251static void
2252coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2253{
2254 SV *count_sv = AvARRAY (av)[0];
2255 IV count = SvIVX (count_sv);
2256
2257 count += adjust;
2258 SvIVX (count_sv) = count;
2259
2260 /* now wake up as many waiters as are expected to lock */
2261 while (count > 0 && AvFILLp (av) > 0)
2262 {
2263 SV *cb;
2264
2265 /* swap first two elements so we can shift a waiter */
2266 AvARRAY (av)[0] = AvARRAY (av)[1];
2267 AvARRAY (av)[1] = count_sv;
2268 cb = av_shift (av);
2269
2270 if (SvOBJECT (cb))
2271 {
2272 api_ready (aTHX_ cb);
2273 --count;
2274 }
2275 else if (SvTYPE (cb) == SVt_PVCV)
2276 {
2277 dSP;
2278 PUSHMARK (SP);
2279 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2280 PUTBACK;
2281 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2282 }
2283
848 SvREFCNT_dec (next); 2284 SvREFCNT_dec (cb);
2285 }
2286}
2287
2288static void
2289coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2290{
2291 /* call $sem->adjust (0) to possibly wake up some other waiters */
2292 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2293}
2294
2295static int
2296slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2297{
2298 AV *av = (AV *)frame->data;
2299 SV *count_sv = AvARRAY (av)[0];
2300
2301 /* if we are about to throw, don't actually acquire the lock, just throw */
2302 if (CORO_THROW)
2303 return 0;
2304 else if (SvIVX (count_sv) > 0)
2305 {
2306 SvSTATE_current->on_destroy = 0;
2307
2308 if (acquire)
2309 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2310 else
2311 coro_semaphore_adjust (aTHX_ av, 0);
2312
2313 return 0;
2314 }
2315 else
2316 {
2317 int i;
2318 /* if we were woken up but can't down, we look through the whole */
2319 /* waiters list and only add us if we aren't in there already */
2320 /* this avoids some degenerate memory usage cases */
2321
2322 for (i = 1; i <= AvFILLp (av); ++i)
2323 if (AvARRAY (av)[i] == SvRV (coro_current))
2324 return 1;
2325
2326 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2327 return 1;
2328 }
2329}
2330
2331static int
2332slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2333{
2334 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2335}
2336
2337static int
2338slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2339{
2340 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2341}
2342
2343static void
2344slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2345{
2346 AV *av = (AV *)SvRV (arg [0]);
2347
2348 if (SvIVX (AvARRAY (av)[0]) > 0)
2349 {
2350 frame->data = (void *)av;
2351 frame->prepare = prepare_nop;
2352 }
2353 else
2354 {
2355 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2356
2357 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2358 frame->prepare = prepare_schedule;
2359
2360 /* to avoid race conditions when a woken-up coro gets terminated */
2361 /* we arrange for a temporary on_destroy that calls adjust (0) */
2362 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2363 }
2364}
2365
2366static void
2367slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2368{
2369 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2370 frame->check = slf_check_semaphore_down;
2371}
2372
2373static void
2374slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2375{
2376 if (items >= 2)
2377 {
2378 /* callback form */
2379 AV *av = (AV *)SvRV (arg [0]);
2380 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2381
2382 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2383
2384 if (SvIVX (AvARRAY (av)[0]) > 0)
2385 coro_semaphore_adjust (aTHX_ av, 0);
2386
2387 frame->prepare = prepare_nop;
2388 frame->check = slf_check_nop;
2389 }
2390 else
2391 {
2392 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2393 frame->check = slf_check_semaphore_wait;
2394 }
2395}
2396
2397/* signal */
2398
2399static void
2400coro_signal_wake (pTHX_ AV *av, int count)
2401{
2402 SvIVX (AvARRAY (av)[0]) = 0;
2403
2404 /* now signal count waiters */
2405 while (count > 0 && AvFILLp (av) > 0)
2406 {
2407 SV *cb;
2408
2409 /* swap first two elements so we can shift a waiter */
2410 cb = AvARRAY (av)[0];
2411 AvARRAY (av)[0] = AvARRAY (av)[1];
2412 AvARRAY (av)[1] = cb;
2413
2414 cb = av_shift (av);
2415
2416 api_ready (aTHX_ cb);
2417 sv_setiv (cb, 0); /* signal waiter */
2418 SvREFCNT_dec (cb);
2419
2420 --count;
2421 }
2422}
2423
2424static int
2425slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2426{
2427 /* if we are about to throw, also stop waiting */
2428 return SvROK ((SV *)frame->data) && !CORO_THROW;
2429}
2430
2431static void
2432slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2433{
2434 AV *av = (AV *)SvRV (arg [0]);
2435
2436 if (SvIVX (AvARRAY (av)[0]))
2437 {
2438 SvIVX (AvARRAY (av)[0]) = 0;
2439 frame->prepare = prepare_nop;
2440 frame->check = slf_check_nop;
2441 }
2442 else
2443 {
2444 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2445
2446 av_push (av, waiter);
2447
2448 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2449 frame->prepare = prepare_schedule;
2450 frame->check = slf_check_signal_wait;
2451 }
2452}
2453
2454/*****************************************************************************/
2455/* Coro::AIO */
2456
2457#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2458
2459/* helper storage struct */
2460struct io_state
2461{
2462 int errorno;
2463 I32 laststype; /* U16 in 5.10.0 */
2464 int laststatval;
2465 Stat_t statcache;
2466};
2467
2468static void
2469coro_aio_callback (pTHX_ CV *cv)
2470{
2471 dXSARGS;
2472 AV *state = (AV *)GENSUB_ARG;
2473 SV *coro = av_pop (state);
2474 SV *data_sv = newSV (sizeof (struct io_state));
2475
2476 av_extend (state, items - 1);
2477
2478 sv_upgrade (data_sv, SVt_PV);
2479 SvCUR_set (data_sv, sizeof (struct io_state));
2480 SvPOK_only (data_sv);
2481
2482 {
2483 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2484
2485 data->errorno = errno;
2486 data->laststype = PL_laststype;
2487 data->laststatval = PL_laststatval;
2488 data->statcache = PL_statcache;
2489 }
2490
2491 /* now build the result vector out of all the parameters and the data_sv */
2492 {
2493 int i;
2494
2495 for (i = 0; i < items; ++i)
2496 av_push (state, SvREFCNT_inc_NN (ST (i)));
2497 }
2498
2499 av_push (state, data_sv);
2500
2501 api_ready (aTHX_ coro);
849 SvREFCNT_dec (prev); 2502 SvREFCNT_dec (coro);
2503 SvREFCNT_dec ((AV *)state);
850} 2504}
851 2505
2506static int
2507slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2508{
2509 AV *state = (AV *)frame->data;
2510
2511 /* if we are about to throw, return early */
2512 /* this does not cancel the aio request, but at least */
2513 /* it quickly returns */
2514 if (CORO_THROW)
2515 return 0;
2516
2517 /* one element that is an RV? repeat! */
2518 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2519 return 1;
2520
2521 /* restore status */
2522 {
2523 SV *data_sv = av_pop (state);
2524 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2525
2526 errno = data->errorno;
2527 PL_laststype = data->laststype;
2528 PL_laststatval = data->laststatval;
2529 PL_statcache = data->statcache;
2530
2531 SvREFCNT_dec (data_sv);
2532 }
2533
2534 /* push result values */
2535 {
2536 dSP;
2537 int i;
2538
2539 EXTEND (SP, AvFILLp (state) + 1);
2540 for (i = 0; i <= AvFILLp (state); ++i)
2541 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2542
2543 PUTBACK;
2544 }
2545
2546 return 0;
2547}
2548
2549static void
2550slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2551{
2552 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2553 SV *coro_hv = SvRV (coro_current);
2554 struct coro *coro = SvSTATE_hv (coro_hv);
2555
2556 /* put our coroutine id on the state arg */
2557 av_push (state, SvREFCNT_inc_NN (coro_hv));
2558
2559 /* first see whether we have a non-zero priority and set it as AIO prio */
2560 if (coro->prio)
2561 {
2562 dSP;
2563
2564 static SV *prio_cv;
2565 static SV *prio_sv;
2566
2567 if (expect_false (!prio_cv))
2568 {
2569 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2570 prio_sv = newSViv (0);
2571 }
2572
2573 PUSHMARK (SP);
2574 sv_setiv (prio_sv, coro->prio);
2575 XPUSHs (prio_sv);
2576
2577 PUTBACK;
2578 call_sv (prio_cv, G_VOID | G_DISCARD);
2579 }
2580
2581 /* now call the original request */
2582 {
2583 dSP;
2584 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2585 int i;
2586
2587 PUSHMARK (SP);
2588
2589 /* first push all args to the stack */
2590 EXTEND (SP, items + 1);
2591
2592 for (i = 0; i < items; ++i)
2593 PUSHs (arg [i]);
2594
2595 /* now push the callback closure */
2596 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2597
2598 /* now call the AIO function - we assume our request is uncancelable */
2599 PUTBACK;
2600 call_sv ((SV *)req, G_VOID | G_DISCARD);
2601 }
2602
2603 /* now that the requets is going, we loop toll we have a result */
2604 frame->data = (void *)state;
2605 frame->prepare = prepare_schedule;
2606 frame->check = slf_check_aio_req;
2607}
2608
2609static void
2610coro_aio_req_xs (pTHX_ CV *cv)
2611{
2612 dXSARGS;
2613
2614 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2615
2616 XSRETURN_EMPTY;
2617}
2618
2619/*****************************************************************************/
2620
852MODULE = Coro::State PACKAGE = Coro::State 2621MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
853 2622
854PROTOTYPES: ENABLE 2623PROTOTYPES: DISABLE
855 2624
856BOOT: 2625BOOT:
857{ /* {} necessary for stoopid perl-5.6.x */ 2626{
858 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2627#ifdef USE_ITHREADS
859 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2628# if CORO_PTHREAD
2629 coro_thx = PERL_GET_CONTEXT;
2630# endif
2631#endif
2632 BOOT_PAGESIZE;
2633
2634 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2635 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2636
2637 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2638 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2639 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2640
2641 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2642 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2643 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2644
860 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2645 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
861 2646
862 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2647 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
863 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2648 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
864 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2649 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
865 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2650 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
866
867 if (!padlist_cache)
868 padlist_cache = newHV ();
869 2651
870 main_mainstack = PL_mainstack; 2652 main_mainstack = PL_mainstack;
2653 main_top_env = PL_top_env;
2654
2655 while (main_top_env->je_prev)
2656 main_top_env = main_top_env->je_prev;
871 2657
872 { 2658 {
873 SV *sv = perl_get_sv("Coro::API", 1); 2659 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
874 2660
875 coroapi.ver = CORO_API_VERSION - 1; 2661 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
876 coroapi.transfer = api_transfer; 2662 hv_store_ent (PL_custom_op_names, slf,
877 coroapi.schedule = api_schedule; 2663 newSVpv ("coro_slf", 0), 0);
878 coroapi.ready = api_ready;
879 2664
880 GCoroAPI = &coroapi; 2665 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
881 sv_setiv(sv, (IV)&coroapi); 2666 hv_store_ent (PL_custom_op_descs, slf,
882 SvREADONLY_on(sv); 2667 newSVpv ("coro schedule like function", 0), 0);
883 } 2668 }
884}
885 2669
886Coro::State 2670 coroapi.ver = CORO_API_VERSION;
887_newprocess(args) 2671 coroapi.rev = CORO_API_REVISION;
888 SV * args 2672
889 PROTOTYPE: $ 2673 coroapi.transfer = api_transfer;
2674
2675 coroapi.sv_state = SvSTATE_;
2676 coroapi.execute_slf = api_execute_slf;
2677 coroapi.prepare_nop = prepare_nop;
2678 coroapi.prepare_schedule = prepare_schedule;
2679 coroapi.prepare_cede = prepare_cede;
2680 coroapi.prepare_cede_notself = prepare_cede_notself;
2681
2682 {
2683 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2684
2685 if (!svp) croak ("Time::HiRes is required");
2686 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2687
2688 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2689 }
2690
2691 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2692}
2693
2694SV *
2695new (char *klass, ...)
2696 ALIAS:
2697 Coro::new = 1
890 CODE: 2698 CODE:
891 Coro__State coro; 2699{
2700 struct coro *coro;
2701 MAGIC *mg;
2702 HV *hv;
2703 CV *cb;
2704 int i;
892 2705
893 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2706 if (items > 1)
894 croak ("Coro::State::_newprocess expects an arrayref");
895 2707 {
2708 cb = coro_sv_2cv (aTHX_ ST (1));
2709
2710 if (!ix)
2711 {
2712 if (CvISXSUB (cb))
2713 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2714
2715 if (!CvROOT (cb))
2716 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2717 }
2718 }
2719
896 New (0, coro, 1, struct coro); 2720 Newz (0, coro, 1, struct coro);
2721 coro->args = newAV ();
2722 coro->flags = CF_NEW;
897 2723
898 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2724 if (coro_first) coro_first->prev = coro;
899 coro->mainstack = 0; /* actual work is done inside transfer */ 2725 coro->next = coro_first;
900 coro->stack = 0; 2726 coro_first = coro;
901 2727
902 RETVAL = coro; 2728 coro->hv = hv = newHV ();
2729 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2730 mg->mg_flags |= MGf_DUP;
2731 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2732
2733 if (items > 1)
2734 {
2735 av_extend (coro->args, items - 1 + ix - 1);
2736
2737 if (ix)
2738 {
2739 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2740 cb = cv_coro_run;
2741 }
2742
2743 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2744
2745 for (i = 2; i < items; i++)
2746 av_push (coro->args, newSVsv (ST (i)));
2747 }
2748}
903 OUTPUT: 2749 OUTPUT:
904 RETVAL 2750 RETVAL
905 2751
906void 2752void
907transfer(prev, next, flags) 2753transfer (...)
908 Coro::State_or_hashref prev
909 Coro::State_or_hashref next
910 int flags
911 PROTOTYPE: @ 2754 PROTOTYPE: $$
912 CODE: 2755 CODE:
913 PUTBACK; 2756 CORO_EXECUTE_SLF_XS (slf_init_transfer);
914 transfer (aTHX_ prev, next, flags); 2757
915 SPAGAIN; 2758bool
2759_destroy (SV *coro_sv)
2760 CODE:
2761 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2762 OUTPUT:
2763 RETVAL
916 2764
917void 2765void
918DESTROY(coro) 2766_exit (int code)
919 Coro::State coro 2767 PROTOTYPE: $
920 CODE: 2768 CODE:
2769 _exit (code);
921 2770
922 if (coro->mainstack && coro->mainstack != main_mainstack) 2771int
2772cctx_stacksize (int new_stacksize = 0)
2773 PROTOTYPE: ;$
2774 CODE:
2775 RETVAL = cctx_stacksize;
2776 if (new_stacksize)
2777 {
2778 cctx_stacksize = new_stacksize;
2779 ++cctx_gen;
2780 }
2781 OUTPUT:
2782 RETVAL
2783
2784int
2785cctx_max_idle (int max_idle = 0)
2786 PROTOTYPE: ;$
2787 CODE:
2788 RETVAL = cctx_max_idle;
2789 if (max_idle > 1)
2790 cctx_max_idle = max_idle;
2791 OUTPUT:
2792 RETVAL
2793
2794int
2795cctx_count ()
2796 PROTOTYPE:
2797 CODE:
2798 RETVAL = cctx_count;
2799 OUTPUT:
2800 RETVAL
2801
2802int
2803cctx_idle ()
2804 PROTOTYPE:
2805 CODE:
2806 RETVAL = cctx_idle;
2807 OUTPUT:
2808 RETVAL
2809
2810void
2811list ()
2812 PROTOTYPE:
2813 PPCODE:
2814{
2815 struct coro *coro;
2816 for (coro = coro_first; coro; coro = coro->next)
2817 if (coro->hv)
2818 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2819}
2820
2821void
2822call (Coro::State coro, SV *coderef)
2823 ALIAS:
2824 eval = 1
2825 CODE:
2826{
2827 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
923 { 2828 {
924 struct coro temp; 2829 struct coro temp;
925 2830
926 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2831 if (!(coro->flags & CF_RUNNING))
927 LOAD(aTHX_ coro); 2832 {
2833 PUTBACK;
2834 save_perl (aTHX_ &temp);
2835 load_perl (aTHX_ coro);
2836 }
928 2837
929 destroy_stacks (aTHX); 2838 {
2839 dSP;
2840 ENTER;
2841 SAVETMPS;
2842 PUTBACK;
2843 PUSHSTACK;
2844 PUSHMARK (SP);
930 2845
931 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2846 if (ix)
2847 eval_sv (coderef, 0);
2848 else
2849 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
932 2850
933 coro->mainstack = 0; 2851 POPSTACK;
2852 SPAGAIN;
2853 FREETMPS;
2854 LEAVE;
2855 PUTBACK;
2856 }
2857
2858 if (!(coro->flags & CF_RUNNING))
2859 {
2860 save_perl (aTHX_ coro);
2861 load_perl (aTHX_ &temp);
2862 SPAGAIN;
2863 }
934 } 2864 }
2865}
935 2866
936 deallocate_stack (coro); 2867SV *
937 2868is_ready (Coro::State coro)
938 Safefree (coro); 2869 PROTOTYPE: $
2870 ALIAS:
2871 is_ready = CF_READY
2872 is_running = CF_RUNNING
2873 is_new = CF_NEW
2874 is_destroyed = CF_DESTROYED
2875 CODE:
2876 RETVAL = boolSV (coro->flags & ix);
2877 OUTPUT:
2878 RETVAL
939 2879
940void 2880void
941flush() 2881throw (Coro::State self, SV *throw = &PL_sv_undef)
942 CODE: 2882 PROTOTYPE: $;$
943#ifdef MAY_FLUSH 2883 CODE:
944 flush_padlist_cache (); 2884{
945#endif 2885 struct coro *current = SvSTATE_current;
2886 SV **throwp = self == current ? &CORO_THROW : &self->except;
2887 SvREFCNT_dec (*throwp);
2888 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2889}
946 2890
947void 2891void
948_exit(code) 2892api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
949 int code 2893 PROTOTYPE: $;$
2894 C_ARGS: aTHX_ coro, flags
2895
2896SV *
2897has_cctx (Coro::State coro)
950 PROTOTYPE: $ 2898 PROTOTYPE: $
951 CODE: 2899 CODE:
952#if defined(__GLIBC__) || _POSIX_C_SOURCE 2900 RETVAL = boolSV (!!coro->cctx);
953 _exit (code); 2901 OUTPUT:
954#else 2902 RETVAL
955 signal (SIGTERM, SIG_DFL);
956 raise (SIGTERM);
957 exit (code);
958#endif
959 2903
960MODULE = Coro::State PACKAGE = Coro::Cont 2904int
2905is_traced (Coro::State coro)
2906 PROTOTYPE: $
2907 CODE:
2908 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2909 OUTPUT:
2910 RETVAL
961 2911
962# this is slightly dirty (should expose a c-level api) 2912UV
2913rss (Coro::State coro)
2914 PROTOTYPE: $
2915 ALIAS:
2916 usecount = 1
2917 CODE:
2918 switch (ix)
2919 {
2920 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2921 case 1: RETVAL = coro->usecount; break;
2922 }
2923 OUTPUT:
2924 RETVAL
963 2925
964void 2926void
965yield(...) 2927force_cctx ()
2928 PROTOTYPE:
2929 CODE:
2930 SvSTATE_current->cctx->idle_sp = 0;
2931
2932void
2933swap_defsv (Coro::State self)
966 PROTOTYPE: @ 2934 PROTOTYPE: $
2935 ALIAS:
2936 swap_defav = 1
967 CODE: 2937 CODE:
968 static SV *returnstk; 2938 if (!self->slot)
969 SV *sv; 2939 croak ("cannot swap state with coroutine that has no saved state,");
970 AV *defav = GvAV (PL_defgv); 2940 else
971 struct coro *prev, *next; 2941 {
2942 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2943 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
972 2944
973 if (!returnstk) 2945 SV *tmp = *src; *src = *dst; *dst = tmp;
974 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2946 }
975 2947
976 /* set up @_ -- ugly */
977 av_clear (defav);
978 av_fill (defav, items - 1);
979 while (items--)
980 av_store (defav, items, SvREFCNT_inc (ST(items)));
981
982 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
983 sv = av_pop ((AV *)SvRV (returnstk));
984 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
985 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
986 SvREFCNT_dec (sv);
987
988 transfer(aTHX_ prev, next, 0);
989 2948
990MODULE = Coro::State PACKAGE = Coro 2949MODULE = Coro::State PACKAGE = Coro
991 2950
992# this is slightly dirty (should expose a c-level api)
993
994BOOT: 2951BOOT:
995{ 2952{
996 int i; 2953 int i;
2954
2955 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2956 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2957 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2958 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
2959 cv_coro_terminate = get_cv ( "Coro::terminate", GV_ADD);
2960 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE);
2961 SvREADONLY_on (coro_current);
2962
2963 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
2964 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
2965 cv_pool_handler = get_cv ("Coro::_pool_handler", 0); SvREADONLY_on (cv_pool_handler);
2966 cv_coro_new = get_cv ("Coro::new", 0); SvREADONLY_on (cv_coro_new);
2967
997 HV *stash = gv_stashpv ("Coro", TRUE); 2968 coro_stash = gv_stashpv ("Coro", TRUE);
998 2969
999 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2970 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1000 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2971 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1001 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2972 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1002 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2973 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1003 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2974 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1004 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2975 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1005
1006 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1007 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1008 2976
1009 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2977 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1010 coro_ready[i] = newAV (); 2978 coro_ready[i] = newAV ();
2979
2980 {
2981 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2982
2983 coroapi.schedule = api_schedule;
2984 coroapi.cede = api_cede;
2985 coroapi.cede_notself = api_cede_notself;
2986 coroapi.ready = api_ready;
2987 coroapi.is_ready = api_is_ready;
2988 coroapi.nready = coro_nready;
2989 coroapi.current = coro_current;
2990
2991 /*GCoroAPI = &coroapi;*/
2992 sv_setiv (sv, (IV)&coroapi);
2993 SvREADONLY_on (sv);
2994 }
1011} 2995}
1012 2996
1013void 2997void
1014ready(self) 2998schedule (...)
1015 SV * self
1016 CODE: 2999 CODE:
1017 api_ready (self); 3000 CORO_EXECUTE_SLF_XS (slf_init_schedule);
1018 3001
1019void 3002void
1020schedule(...) 3003cede (...)
1021 ALIAS:
1022 cede = 1
1023 CODE: 3004 CODE:
1024 api_schedule (ix); 3005 CORO_EXECUTE_SLF_XS (slf_init_cede);
1025 3006
3007void
3008cede_notself (...)
3009 CODE:
3010 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3011
3012void
3013_set_current (SV *current)
3014 PROTOTYPE: $
3015 CODE:
3016 SvREFCNT_dec (SvRV (coro_current));
3017 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3018
3019void
3020_set_readyhook (SV *hook)
3021 PROTOTYPE: $
3022 CODE:
3023 SvREFCNT_dec (coro_readyhook);
3024 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3025
3026int
3027prio (Coro::State coro, int newprio = 0)
3028 PROTOTYPE: $;$
3029 ALIAS:
3030 nice = 1
3031 CODE:
3032{
3033 RETVAL = coro->prio;
3034
3035 if (items > 1)
3036 {
3037 if (ix)
3038 newprio = coro->prio - newprio;
3039
3040 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3041 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3042
3043 coro->prio = newprio;
3044 }
3045}
3046 OUTPUT:
3047 RETVAL
3048
3049SV *
3050ready (SV *self)
3051 PROTOTYPE: $
3052 CODE:
3053 RETVAL = boolSV (api_ready (aTHX_ self));
3054 OUTPUT:
3055 RETVAL
3056
3057int
3058nready (...)
3059 PROTOTYPE:
3060 CODE:
3061 RETVAL = coro_nready;
3062 OUTPUT:
3063 RETVAL
3064
3065void
3066_pool_handler (...)
3067 CODE:
3068 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3069
3070void
3071async_pool (SV *cv, ...)
3072 PROTOTYPE: &@
3073 PPCODE:
3074{
3075 HV *hv = (HV *)av_pop (av_async_pool);
3076 AV *av = newAV ();
3077 SV *cb = ST (0);
3078 int i;
3079
3080 av_extend (av, items - 2);
3081 for (i = 1; i < items; ++i)
3082 av_push (av, SvREFCNT_inc_NN (ST (i)));
3083
3084 if ((SV *)hv == &PL_sv_undef)
3085 {
3086 PUSHMARK (SP);
3087 EXTEND (SP, 2);
3088 PUSHs (sv_Coro);
3089 PUSHs ((SV *)cv_pool_handler);
3090 PUTBACK;
3091 call_sv ((SV *)cv_coro_new, G_SCALAR);
3092 SPAGAIN;
3093
3094 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3095 }
3096
3097 {
3098 struct coro *coro = SvSTATE_hv (hv);
3099
3100 assert (!coro->invoke_cb);
3101 assert (!coro->invoke_av);
3102 coro->invoke_cb = SvREFCNT_inc (cb);
3103 coro->invoke_av = av;
3104 }
3105
3106 api_ready (aTHX_ (SV *)hv);
3107
3108 if (GIMME_V != G_VOID)
3109 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3110 else
3111 SvREFCNT_dec (hv);
3112}
3113
3114SV *
3115rouse_cb ()
3116 PROTOTYPE:
3117 CODE:
3118 RETVAL = coro_new_rouse_cb (aTHX);
3119 OUTPUT:
3120 RETVAL
3121
3122void
3123rouse_wait (...)
3124 PROTOTYPE: ;$
3125 PPCODE:
3126 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3127
3128
3129MODULE = Coro::State PACKAGE = PerlIO::cede
3130
3131BOOT:
3132 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3133
3134
3135MODULE = Coro::State PACKAGE = Coro::Semaphore
3136
3137SV *
3138new (SV *klass, SV *count = 0)
3139 CODE:
3140 RETVAL = sv_bless (
3141 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3142 GvSTASH (CvGV (cv))
3143 );
3144 OUTPUT:
3145 RETVAL
3146
3147# helper for Coro::Channel
3148SV *
3149_alloc (int count)
3150 CODE:
3151 RETVAL = coro_waitarray_new (aTHX_ count);
3152 OUTPUT:
3153 RETVAL
3154
3155SV *
3156count (SV *self)
3157 CODE:
3158 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3159 OUTPUT:
3160 RETVAL
3161
3162void
3163up (SV *self, int adjust = 1)
3164 ALIAS:
3165 adjust = 1
3166 CODE:
3167 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3168
3169void
3170down (...)
3171 CODE:
3172 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3173
3174void
3175wait (...)
3176 CODE:
3177 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3178
3179void
3180try (SV *self)
3181 PPCODE:
3182{
3183 AV *av = (AV *)SvRV (self);
3184 SV *count_sv = AvARRAY (av)[0];
3185 IV count = SvIVX (count_sv);
3186
3187 if (count > 0)
3188 {
3189 --count;
3190 SvIVX (count_sv) = count;
3191 XSRETURN_YES;
3192 }
3193 else
3194 XSRETURN_NO;
3195}
3196
3197void
3198waiters (SV *self)
3199 PPCODE:
3200{
3201 AV *av = (AV *)SvRV (self);
3202 int wcount = AvFILLp (av) + 1 - 1;
3203
3204 if (GIMME_V == G_SCALAR)
3205 XPUSHs (sv_2mortal (newSViv (wcount)));
3206 else
3207 {
3208 int i;
3209 EXTEND (SP, wcount);
3210 for (i = 1; i <= wcount; ++i)
3211 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3212 }
3213}
3214
3215MODULE = Coro::State PACKAGE = Coro::Signal
3216
3217SV *
3218new (SV *klass)
3219 CODE:
3220 RETVAL = sv_bless (
3221 coro_waitarray_new (aTHX_ 0),
3222 GvSTASH (CvGV (cv))
3223 );
3224 OUTPUT:
3225 RETVAL
3226
3227void
3228wait (...)
3229 CODE:
3230 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3231
3232void
3233broadcast (SV *self)
3234 CODE:
3235{
3236 AV *av = (AV *)SvRV (self);
3237 coro_signal_wake (aTHX_ av, AvFILLp (av));
3238}
3239
3240void
3241send (SV *self)
3242 CODE:
3243{
3244 AV *av = (AV *)SvRV (self);
3245
3246 if (AvFILLp (av))
3247 coro_signal_wake (aTHX_ av, 1);
3248 else
3249 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3250}
3251
3252IV
3253awaited (SV *self)
3254 CODE:
3255 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3256 OUTPUT:
3257 RETVAL
3258
3259
3260MODULE = Coro::State PACKAGE = Coro::AnyEvent
3261
3262BOOT:
3263 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3264
3265void
3266_schedule (...)
3267 CODE:
3268{
3269 static int incede;
3270
3271 api_cede_notself (aTHX);
3272
3273 ++incede;
3274 while (coro_nready >= incede && api_cede (aTHX))
3275 ;
3276
3277 sv_setsv (sv_activity, &PL_sv_undef);
3278 if (coro_nready >= incede)
3279 {
3280 PUSHMARK (SP);
3281 PUTBACK;
3282 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3283 }
3284
3285 --incede;
3286}
3287
3288
3289MODULE = Coro::State PACKAGE = Coro::AIO
3290
3291void
3292_register (char *target, char *proto, SV *req)
3293 CODE:
3294{
3295 CV *req_cv = coro_sv_2cv (aTHX_ req);
3296 /* newXSproto doesn't return the CV on 5.8 */
3297 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3298 sv_setpv ((SV *)slf_cv, proto);
3299 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3300}
3301

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