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Comparing Coro/Coro/State.xs (file contents):
Revision 1.68 by root, Mon Dec 12 20:28:30 2005 UTC vs.
Revision 1.337 by root, Fri Dec 5 18:26:10 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 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
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# 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
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <signal.h> 83/* 5.11 */
33 84#ifndef CxHASARGS
34#ifdef HAVE_MMAP 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
35# include <unistd.h>
36# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS
38# ifdef MAP_ANON
39# define MAP_ANONYMOUS MAP_ANON
40# else
41# undef HAVE_MMAP
42# endif 86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
114
115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
116# undef CORO_STACKGUARD
117#endif
118
119#ifndef CORO_STACKGUARD
120# define CORO_STACKGUARD 0
121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
135# define STACKLEVEL ((void *)&stacklevel)
136#endif
137
138#define IN_DESTRUCT PL_dirty
139
140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
154
155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
43# endif 161# endif
44#endif 162#endif
45 163
46#define SUB_INIT "Coro::State::initialize" 164static double (*nvtime)(); /* so why doesn't it take void? */
47#define UCORO_STATE "_coro_state"
48 165
49/* The next macro should declare a variable stacklevel that contains and approximation 166/* we hijack an hopefully unused CV flag for our purposes */
50 * to the current C stack pointer. Its property is that it changes with each call 167#define CVf_SLF 0x4000
51 * and should be unique. */ 168static OP *pp_slf (pTHX);
52#define dSTACKLEVEL void *stacklevel = &stacklevel
53 169
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 170static U32 cctx_gen;
55 171static size_t cctx_stacksize = CORO_STACKSIZE;
56#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58#include "CoroAPI.h"
59
60#ifdef USE_ITHREADS
61static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else
65# define LOCK 0
66# define UNLOCK 0
67#endif
68
69static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
71static HV *coro_state_stash; 175static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
75 177
76/* this is actually not only the c stack but also c registers etc... */ 178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180static SV *sv_idle; /* $Coro::idle */
181
182static GV *irsgv; /* $/ */
183static GV *stdoutgv; /* *STDOUT */
184static SV *rv_diehook;
185static SV *rv_warnhook;
186static HV *hv_sig; /* %SIG */
187
188/* async_pool helper stuff */
189static SV *sv_pool_rss;
190static SV *sv_pool_size;
191static SV *sv_async_pool_idle; /* description string */
192static AV *av_async_pool; /* idle pool */
193static SV *sv_Coro; /* class string */
194static CV *cv_pool_handler;
195static CV *cv_coro_state_new;
196
197/* Coro::AnyEvent */
198static SV *sv_activity;
199
200static struct coro_cctx *cctx_first;
201static int cctx_count, cctx_idle;
202
203enum {
204 CC_MAPPED = 0x01,
205 CC_NOREUSE = 0x02, /* throw this away after tracing */
206 CC_TRACE = 0x04,
207 CC_TRACE_SUB = 0x08, /* trace sub calls */
208 CC_TRACE_LINE = 0x10, /* trace each statement */
209 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
210};
211
212/* this is a structure representing a c-level coroutine */
77typedef struct { 213typedef struct coro_cctx
78 int refcnt; /* pointer reference counter */ 214{
79 int usecnt; /* shared by how many coroutines */ 215 struct coro_cctx *next;
80 int gencnt; /* generation counter */
81 216
217 /* the stack */
218 void *sptr;
219 size_t ssize;
220
221 /* cpu state */
222 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
223 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
224 JMPENV *top_env;
82 coro_context cctx; 225 coro_context cctx;
83 226
84 void *sptr; 227 U32 gen;
85 long ssize; /* positive == mmap, otherwise malloc */ 228#if CORO_USE_VALGRIND
86} coro_stack; 229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
87 233
234coro_cctx *cctx_current; /* the currently running cctx */
235
236/*****************************************************************************/
237
238enum {
239 CF_RUNNING = 0x0001, /* coroutine is running */
240 CF_READY = 0x0002, /* coroutine is ready */
241 CF_NEW = 0x0004, /* has never been switched to */
242 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
243};
244
245/* the structure where most of the perl state is stored, overlaid on the cxstack */
246typedef struct
247{
248 SV *defsv;
249 AV *defav;
250 SV *errsv;
251 SV *irsgv;
252 HV *hinthv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
259
260/* this is a structure representing a perl-level coroutine */
88struct coro { 261struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 262 /* the C coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 263 coro_cctx *cctx;
91 264
92 /* the optional C context */ 265 /* state data */
93 coro_stack *stack; 266 struct CoroSLF slf_frame; /* saved slf frame */
94 void *cursp;
95 int gencnt;
96
97 /* optionally saved, might be zero */
98 AV *defav;
99 SV *defsv;
100 SV *errsv;
101
102 /* saved global state not related to stacks */
103 U8 dowarn;
104 I32 in_eval;
105
106 /* the stacks and related info (callchain etc..) */
107 PERL_SI *curstackinfo;
108 AV *curstack;
109 AV *mainstack; 267 AV *mainstack;
110 SV **stack_sp; 268 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 CV *compcv;
115 SV **stack_base;
116 SV **stack_max;
117 SV **tmps_stack;
118 I32 tmps_floor;
119 I32 tmps_ix;
120 I32 tmps_max;
121 I32 *markstack;
122 I32 *markstack_ptr;
123 I32 *markstack_max;
124 I32 *scopestack;
125 I32 scopestack_ix;
126 I32 scopestack_max;
127 ANY *savestack;
128 I32 savestack_ix;
129 I32 savestack_max;
130 OP **retstack;
131 I32 retstack_ix;
132 I32 retstack_max;
133 PMOP *curpm;
134 COP *curcop;
135 JMPENV *top_env;
136 269
270 CV *startcv; /* the CV to execute */
137 /* data associated with this coroutine (initial args) */ 271 AV *args; /* data associated with this coroutine (initial args) */
138 AV *args; 272 int refcnt; /* coroutines are refcounted, yes */
273 int flags; /* CF_ flags */
274 HV *hv; /* the perl hash associated with this coro, if any */
275 void (*on_destroy)(pTHX_ struct coro *coro);
276
277 /* statistics */
278 int usecount; /* number of transfers to this coro */
279
280 /* coro process data */
281 int prio;
282 SV *except; /* exception to be thrown */
283 SV *rouse_cb;
284
285 /* async_pool */
286 SV *saved_deffh;
287 SV *invoke_cb;
288 AV *invoke_av;
289
290 /* linked list */
291 struct coro *next, *prev;
139}; 292};
140 293
141typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
142typedef struct coro *Coro__State_or_hashref; 295typedef struct coro *Coro__State_or_hashref;
143 296
144/* mostly copied from op.c:cv_clone2 */ 297/* the following variables are effectively part of the perl context */
145STATIC AV * 298/* and get copied between struct coro and these variables */
146clone_padlist (pTHX_ AV *protopadlist) 299/* the mainr easonw e don't support windows process emulation */
147{ 300static struct CoroSLF slf_frame; /* the current slf frame */
148 AV *av;
149 I32 ix;
150 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
151 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
152 SV **pname = AvARRAY (protopad_name);
153 SV **ppad = AvARRAY (protopad);
154 I32 fname = AvFILLp (protopad_name);
155 I32 fpad = AvFILLp (protopad);
156 AV *newpadlist, *newpad_name, *newpad;
157 SV **npad;
158
159 newpad_name = newAV ();
160 for (ix = fname; ix >= 0; ix--)
161 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
162
163 newpad = newAV ();
164 av_fill (newpad, AvFILLp (protopad));
165 npad = AvARRAY (newpad);
166
167 newpadlist = newAV ();
168 AvREAL_off (newpadlist);
169 av_store (newpadlist, 0, (SV *) newpad_name);
170 av_store (newpadlist, 1, (SV *) newpad);
171
172 av = newAV (); /* will be @_ */
173 av_extend (av, 0);
174 av_store (newpad, 0, (SV *) av);
175 AvFLAGS (av) = AVf_REIFY;
176
177 for (ix = fpad; ix > 0; ix--)
178 {
179 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
180
181 if (namesv && namesv != &PL_sv_undef)
182 {
183 char *name = SvPVX (namesv); /* XXX */
184
185 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
186 { /* lexical from outside? */
187 npad[ix] = SvREFCNT_inc (ppad[ix]);
188 }
189 else
190 { /* our own lexical */
191 SV *sv;
192 if (*name == '&')
193 sv = SvREFCNT_inc (ppad[ix]);
194 else if (*name == '@')
195 sv = (SV *) newAV ();
196 else if (*name == '%')
197 sv = (SV *) newHV ();
198 else
199 sv = NEWSV (0, 0);
200
201#ifdef SvPADBUSY
202 if (!SvPADBUSY (sv))
203#endif
204 SvPADMY_on (sv);
205
206 npad[ix] = sv;
207 }
208 }
209 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
210 {
211 npad[ix] = SvREFCNT_inc (ppad[ix]);
212 }
213 else
214 {
215 SV *sv = NEWSV (0, 0);
216 SvPADTMP_on (sv);
217 npad[ix] = sv;
218 }
219 }
220
221#if 0 /* return -ENOTUNDERSTOOD */
222 /* Now that vars are all in place, clone nested closures. */
223
224 for (ix = fpad; ix > 0; ix--) {
225 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
226 if (namesv
227 && namesv != &PL_sv_undef
228 && !(SvFLAGS(namesv) & SVf_FAKE)
229 && *SvPVX(namesv) == '&'
230 && CvCLONE(ppad[ix]))
231 {
232 CV *kid = cv_clone((CV*)ppad[ix]);
233 SvREFCNT_dec(ppad[ix]);
234 CvCLONE_on(kid);
235 SvPADMY_on(kid);
236 npad[ix] = (SV*)kid;
237 }
238 }
239#endif
240
241 return newpadlist;
242}
243
244STATIC void
245free_padlist (pTHX_ AV *padlist)
246{
247 /* may be during global destruction */
248 if (SvREFCNT (padlist))
249 {
250 I32 i = AvFILLp (padlist);
251 while (i >= 0)
252 {
253 SV **svp = av_fetch (padlist, i--, FALSE);
254 if (svp)
255 {
256 SV *sv;
257 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
258 SvREFCNT_dec (sv);
259
260 SvREFCNT_dec (*svp);
261 }
262 }
263
264 SvREFCNT_dec ((SV*)padlist);
265 }
266}
267
268STATIC int
269coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270{
271 AV *padlist;
272 AV *av = (AV *)mg->mg_obj;
273
274 /* casting is fun. */
275 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276 free_padlist (aTHX_ padlist);
277
278 SvREFCNT_dec (av);
279}
280
281#define PERL_MAGIC_coro PERL_MAGIC_ext
282
283static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
284
285/* the next two functions merely cache the padlists */
286STATIC void
287get_padlist (pTHX_ CV *cv)
288{
289 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
290
291 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
292 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
293 else
294 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));
295}
296
297STATIC void
298put_padlist (pTHX_ CV *cv)
299{
300 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
301
302 if (!mg)
303 {
304 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
305 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
306 mg->mg_virtual = &vtbl_coro;
307 mg->mg_obj = (SV *)newAV ();
308 }
309
310 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
311}
312
313#define SB do {
314#define SE } while (0)
315
316#define LOAD(state) load_state(aTHX_ (state));
317#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
318
319#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
320
321static void
322load_state(pTHX_ Coro__State c)
323{
324 PL_dowarn = c->dowarn;
325 PL_in_eval = c->in_eval;
326
327 PL_curstackinfo = c->curstackinfo;
328 PL_curstack = c->curstack;
329 PL_mainstack = c->mainstack;
330 PL_stack_sp = c->stack_sp;
331 PL_op = c->op;
332 PL_curpad = c->curpad;
333 PL_comppad = c->comppad;
334 PL_compcv = c->compcv;
335 PL_stack_base = c->stack_base;
336 PL_stack_max = c->stack_max;
337 PL_tmps_stack = c->tmps_stack;
338 PL_tmps_floor = c->tmps_floor;
339 PL_tmps_ix = c->tmps_ix;
340 PL_tmps_max = c->tmps_max;
341 PL_markstack = c->markstack;
342 PL_markstack_ptr = c->markstack_ptr;
343 PL_markstack_max = c->markstack_max;
344 PL_scopestack = c->scopestack;
345 PL_scopestack_ix = c->scopestack_ix;
346 PL_scopestack_max = c->scopestack_max;
347 PL_savestack = c->savestack;
348 PL_savestack_ix = c->savestack_ix;
349 PL_savestack_max = c->savestack_max;
350 PL_retstack = c->retstack;
351 PL_retstack_ix = c->retstack_ix;
352 PL_retstack_max = c->retstack_max;
353 PL_curpm = c->curpm;
354 PL_curcop = c->curcop;
355 PL_top_env = c->top_env;
356
357 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
358 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
359 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
360
361 {
362 dSP;
363 CV *cv;
364
365 /* now do the ugly restore mess */
366 while ((cv = (CV *)POPs))
367 {
368 AV *padlist = (AV *)POPs;
369
370 if (padlist)
371 {
372 put_padlist (aTHX_ cv); /* mark this padlist as available */
373 CvPADLIST(cv) = padlist;
374 }
375
376 ++CvDEPTH(cv);
377 }
378
379 PUTBACK;
380 }
381}
382
383static void
384save_state(pTHX_ Coro__State c, int flags)
385{
386 {
387 dSP;
388 I32 cxix = cxstack_ix;
389 PERL_CONTEXT *ccstk = cxstack;
390 PERL_SI *top_si = PL_curstackinfo;
391
392 /*
393 * the worst thing you can imagine happens first - we have to save
394 * (and reinitialize) all cv's in the whole callchain :(
395 */
396
397 PUSHs (Nullsv);
398 /* this loop was inspired by pp_caller */
399 for (;;)
400 {
401 while (cxix >= 0)
402 {
403 PERL_CONTEXT *cx = &ccstk[cxix--];
404
405 if (CxTYPE(cx) == CXt_SUB)
406 {
407 CV *cv = cx->blk_sub.cv;
408 if (CvDEPTH(cv))
409 {
410 EXTEND (SP, CvDEPTH(cv)*2);
411
412 while (--CvDEPTH(cv))
413 {
414 /* this tells the restore code to increment CvDEPTH */
415 PUSHs (Nullsv);
416 PUSHs ((SV *)cv);
417 }
418
419 PUSHs ((SV *)CvPADLIST(cv));
420 PUSHs ((SV *)cv);
421
422 get_padlist (aTHX_ cv); /* this is a monster */
423 }
424 }
425#ifdef CXt_FORMAT
426 else if (CxTYPE(cx) == CXt_FORMAT)
427 {
428 /* I never used formats, so how should I know how these are implemented? */
429 /* my bold guess is as a simple, plain sub... */
430 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
431 }
432#endif
433 }
434
435 if (top_si->si_type == PERLSI_MAIN)
436 break;
437
438 top_si = top_si->si_prev;
439 ccstk = top_si->si_cxstack;
440 cxix = top_si->si_cxix;
441 }
442
443 PUTBACK;
444 }
445
446 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
447 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
448 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
449
450 c->dowarn = PL_dowarn;
451 c->in_eval = PL_in_eval;
452
453 c->curstackinfo = PL_curstackinfo;
454 c->curstack = PL_curstack;
455 c->mainstack = PL_mainstack;
456 c->stack_sp = PL_stack_sp;
457 c->op = PL_op;
458 c->curpad = PL_curpad;
459 c->comppad = PL_comppad;
460 c->compcv = PL_compcv;
461 c->stack_base = PL_stack_base;
462 c->stack_max = PL_stack_max;
463 c->tmps_stack = PL_tmps_stack;
464 c->tmps_floor = PL_tmps_floor;
465 c->tmps_ix = PL_tmps_ix;
466 c->tmps_max = PL_tmps_max;
467 c->markstack = PL_markstack;
468 c->markstack_ptr = PL_markstack_ptr;
469 c->markstack_max = PL_markstack_max;
470 c->scopestack = PL_scopestack;
471 c->scopestack_ix = PL_scopestack_ix;
472 c->scopestack_max = PL_scopestack_max;
473 c->savestack = PL_savestack;
474 c->savestack_ix = PL_savestack_ix;
475 c->savestack_max = PL_savestack_max;
476 c->retstack = PL_retstack;
477 c->retstack_ix = PL_retstack_ix;
478 c->retstack_max = PL_retstack_max;
479 c->curpm = PL_curpm;
480 c->curcop = PL_curcop;
481 c->top_env = PL_top_env;
482}
483
484/*
485 * allocate various perl stacks. This is an exact copy
486 * of perl.c:init_stacks, except that it uses less memory
487 * on the (sometimes correct) assumption that coroutines do
488 * not usually need a lot of stackspace.
489 */
490STATIC void
491coro_init_stacks (pTHX)
492{
493 LOCK;
494
495 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
496 PL_curstackinfo->si_type = PERLSI_MAIN;
497 PL_curstack = PL_curstackinfo->si_stack;
498 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
499
500 PL_stack_base = AvARRAY(PL_curstack);
501 PL_stack_sp = PL_stack_base;
502 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
503
504 New(50,PL_tmps_stack,96,SV*);
505 PL_tmps_floor = -1;
506 PL_tmps_ix = -1;
507 PL_tmps_max = 96;
508
509 New(54,PL_markstack,16,I32);
510 PL_markstack_ptr = PL_markstack;
511 PL_markstack_max = PL_markstack + 16;
512
513#ifdef SET_MARK_OFFSET
514 SET_MARK_OFFSET;
515#endif
516
517 New(54,PL_scopestack,16,I32);
518 PL_scopestack_ix = 0;
519 PL_scopestack_max = 16;
520
521 New(54,PL_savestack,96,ANY);
522 PL_savestack_ix = 0;
523 PL_savestack_max = 96;
524
525 New(54,PL_retstack,8,OP*);
526 PL_retstack_ix = 0;
527 PL_retstack_max = 8;
528
529 UNLOCK;
530}
531
532/*
533 * destroy the stacks, the callchain etc...
534 */
535STATIC void
536destroy_stacks(pTHX)
537{
538 if (!IN_DESTRUCT)
539 {
540 /* is this ugly, I ask? */
541 LEAVE_SCOPE (0);
542
543 /* sure it is, but more important: is it correct?? :/ */
544 FREETMPS;
545
546 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
547 }
548
549 while (PL_curstackinfo->si_next)
550 PL_curstackinfo = PL_curstackinfo->si_next;
551
552 while (PL_curstackinfo)
553 {
554 PERL_SI *p = PL_curstackinfo->si_prev;
555
556 { /*D*//*remove*/
557 dSP;
558 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
559 PUTBACK; /* possibly superfluous */
560 }
561
562 if (!IN_DESTRUCT)
563 {
564 dounwind (-1);/*D*//*remove*/
565 SvREFCNT_dec (PL_curstackinfo->si_stack);
566 }
567
568 Safefree (PL_curstackinfo->si_cxstack);
569 Safefree (PL_curstackinfo);
570 PL_curstackinfo = p;
571 }
572
573 Safefree (PL_tmps_stack);
574 Safefree (PL_markstack);
575 Safefree (PL_scopestack);
576 Safefree (PL_savestack);
577 Safefree (PL_retstack);
578}
579
580static void
581allocate_stack (Coro__State ctx, int alloc)
582{
583 coro_stack *stack;
584
585 New (0, stack, 1, coro_stack);
586
587 stack->refcnt = 1;
588 stack->usecnt = 1;
589 stack->gencnt = ctx->gencnt = 0;
590
591 if (alloc)
592 {
593#if HAVE_MMAP
594 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
595 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
596 if (stack->sptr == (void *)-1)
597#endif
598 {
599 /*FIXME*//*D*//* reasonable stack size! */
600 stack->ssize = - (STACKSIZE * sizeof (long));
601 New (0, stack->sptr, STACKSIZE, long);
602 }
603 }
604 else
605 stack->sptr = 0;
606
607 ctx->stack = stack;
608}
609
610static void
611deallocate_stack (Coro__State ctx)
612{
613 coro_stack *stack = ctx->stack;
614
615 ctx->stack = 0;
616
617 if (stack)
618 {
619 if (!--stack->refcnt)
620 {
621#ifdef HAVE_MMAP
622 if (stack->ssize > 0 && stack->sptr)
623 munmap (stack->sptr, stack->ssize);
624 else
625#endif
626 Safefree (stack->sptr);
627
628 Safefree (stack);
629 }
630 else if (ctx->gencnt == stack->gencnt)
631 --stack->usecnt;
632 }
633}
634
635static void
636setup_coro (void *arg)
637{
638 /*
639 * emulate part of the perl startup here.
640 */
641 dTHX;
642 dSP;
643 Coro__State ctx = (Coro__State)arg;
644 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
645
646 coro_init_stacks (aTHX);
647 /*PL_curcop = 0;*/
648 /*PL_in_eval = PL_in_eval;*/ /* inherit */
649 SvREFCNT_dec (GvAV (PL_defgv));
650 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
651
652 SPAGAIN;
653
654 if (ctx->stack)
655 {
656 ctx->cursp = 0;
657
658 PUSHMARK(SP);
659 PUTBACK;
660 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
661
662 if (SvTRUE (ERRSV))
663 croak (NULL);
664 else
665 croak ("FATAL: CCTXT coroutine returned!");
666 }
667 else
668 {
669 UNOP myop;
670
671 PL_op = (OP *)&myop;
672
673 Zero(&myop, 1, UNOP);
674 myop.op_next = Nullop;
675 myop.op_flags = OPf_WANT_VOID;
676
677 PUSHMARK(SP);
678 XPUSHs (sub_init);
679 /*
680 * the next line is slightly wrong, as PL_op->op_next
681 * is actually being executed so we skip the first op.
682 * that doesn't matter, though, since it is only
683 * pp_nextstate and we never return...
684 * ah yes, and I don't care anyways ;)
685 */
686 PUTBACK;
687 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
688 SPAGAIN;
689
690 ENTER; /* necessary e.g. for dounwind */
691 }
692}
693
694static void
695continue_coro (void *arg)
696{
697 /*
698 * this is a _very_ stripped down perl interpreter ;)
699 */
700 dTHX;
701 Coro__State ctx = (Coro__State)arg;
702 JMPENV coro_start_env;
703
704 PL_top_env = &ctx->start_env;
705
706 ctx->cursp = 0;
707 PL_op = PL_op->op_next;
708 CALLRUNOPS(aTHX);
709
710 abort ();
711}
712
713STATIC void
714transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
715{
716 dSTACKLEVEL;
717
718 if (prev != next)
719 {
720 if (next->mainstack)
721 {
722 LOCK;
723 SAVE (prev, flags);
724 LOAD (next);
725 UNLOCK;
726
727 /* mark this state as in-use */
728 next->mainstack = 0;
729 next->tmps_ix = -2;
730
731 /* stacklevel changed? if yes, grab the stack for us! */
732 if (flags & TRANSFER_SAVE_CCTXT)
733 {
734 if (!prev->stack)
735 allocate_stack (prev, 0);
736 else if (prev->cursp != stacklevel
737 && prev->stack->usecnt > 1)
738 {
739 prev->gencnt = ++prev->stack->gencnt;
740 prev->stack->usecnt = 1;
741 }
742
743 /* has our stack been invalidated? */
744 if (next->stack && next->stack->gencnt != next->gencnt)
745 {
746 deallocate_stack (next);
747 allocate_stack (next, 1);
748 coro_create (&(next->stack->cctx),
749 continue_coro, (void *)next,
750 next->stack->sptr, labs (next->stack->ssize));
751 }
752
753 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
754 prev->cursp = stacklevel;
755 /* don't add any code here */
756 }
757 else
758 next->cursp = stacklevel;
759 }
760 else if (next->tmps_ix == -2)
761 croak ("tried to transfer to running coroutine");
762 else
763 {
764 LOCK;
765 SAVE (prev, -1); /* first get rid of the old state */
766 UNLOCK;
767
768 if (flags & TRANSFER_SAVE_CCTXT)
769 {
770 if (!prev->stack)
771 allocate_stack (prev, 0);
772
773 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
774 {
775 PL_top_env = &next->start_env;
776
777 setup_coro (next);
778 next->cursp = stacklevel;
779
780 prev->stack->refcnt++;
781 prev->stack->usecnt++;
782 next->stack = prev->stack;
783 next->gencnt = prev->gencnt;
784 }
785 else
786 {
787 assert (!next->stack);
788 allocate_stack (next, 1);
789 coro_create (&(next->stack->cctx),
790 setup_coro, (void *)next,
791 next->stack->sptr, labs (next->stack->ssize));
792 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
793 prev->cursp = stacklevel;
794 /* don't add any code here */
795 }
796 }
797 else
798 {
799 setup_coro (next);
800 next->cursp = stacklevel;
801 }
802 }
803 }
804
805 LOCK;
806 if (coro_mortal)
807 {
808 SvREFCNT_dec (coro_mortal);
809 coro_mortal = 0;
810 }
811 UNLOCK;
812}
813
814#define SV_CORO(sv,func) \
815 do { \
816 if (SvROK (sv)) \
817 sv = SvRV (sv); \
818 \
819 if (SvTYPE (sv) == SVt_PVHV) \
820 { \
821 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
822 \
823 if (!he) \
824 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
825 \
826 (sv) = SvRV (HeVAL(he)); \
827 } \
828 \
829 /* must also be changed inside Coro::Cont::yield */ \
830 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
831 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
832 \
833 } while(0)
834
835#define SvSTATE(sv) (struct coro *)SvIV (sv)
836
837static void
838api_transfer(pTHX_ SV *prev, SV *next, int flags)
839{
840 SV_CORO (prev, "Coro::transfer");
841 SV_CORO (next, "Coro::transfer");
842
843 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
844}
845 301
846/** Coro ********************************************************************/ 302/** Coro ********************************************************************/
847 303
848#define PRIO_MAX 3 304#define PRIO_MAX 3
849#define PRIO_HIGH 1 305#define PRIO_HIGH 1
… …
851#define PRIO_LOW -1 307#define PRIO_LOW -1
852#define PRIO_IDLE -3 308#define PRIO_IDLE -3
853#define PRIO_MIN -4 309#define PRIO_MIN -4
854 310
855/* for Coro.pm */ 311/* for Coro.pm */
856static GV *coro_current, *coro_idle; 312static SV *coro_current;
313static SV *coro_readyhook;
857static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
858static int coro_nready; 315static CV *cv_coro_run, *cv_coro_terminate;
316static struct coro *coro_first;
317#define coro_nready coroapi.nready
859 318
860static void 319/** lowlevel stuff **********************************************************/
861coro_enq (pTHX_ SV *sv)
862{
863 if (SvTYPE (sv) == SVt_PVHV)
864 {
865 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
866 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
867
868 prio = prio > PRIO_MAX ? PRIO_MAX
869 : prio < PRIO_MIN ? PRIO_MIN
870 : prio;
871
872 av_push (coro_ready [prio - PRIO_MIN], sv);
873 coro_nready++;
874
875 return;
876 }
877
878 croak ("Coro::ready tried to enqueue something that is not a coroutine");
879}
880 320
881static SV * 321static SV *
882coro_deq (pTHX_ int min_prio) 322coro_get_sv (pTHX_ const char *name, int create)
883{ 323{
884 int prio = PRIO_MAX - PRIO_MIN; 324#if PERL_VERSION_ATLEAST (5,10,0)
885 325 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
886 min_prio -= PRIO_MIN; 326 get_sv (name, create);
887 if (min_prio < 0) 327#endif
888 min_prio = 0; 328 return get_sv (name, create);
889
890 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891 if (av_len (coro_ready[prio]) >= 0)
892 {
893 coro_nready--;
894 return av_shift (coro_ready[prio]);
895 }
896
897 return 0;
898} 329}
899 330
900static void 331static AV *
901api_ready (SV *coro) 332coro_get_av (pTHX_ const char *name, int create)
902{ 333{
903 dTHX; 334#if PERL_VERSION_ATLEAST (5,10,0)
335 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
336 get_av (name, create);
337#endif
338 return get_av (name, create);
339}
340
341static HV *
342coro_get_hv (pTHX_ const char *name, int create)
343{
344#if PERL_VERSION_ATLEAST (5,10,0)
345 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
346 get_hv (name, create);
347#endif
348 return get_hv (name, create);
349}
350
351/* may croak */
352INLINE CV *
353coro_sv_2cv (pTHX_ SV *sv)
354{
355 HV *st;
356 GV *gvp;
357 return sv_2cv (sv, &st, &gvp, 0);
358}
359
360/*****************************************************************************/
361/* magic glue */
362
363#define CORO_MAGIC_type_cv 26
364#define CORO_MAGIC_type_state PERL_MAGIC_ext
365
366#define CORO_MAGIC_NN(sv, type) \
367 (expect_true (SvMAGIC (sv)->mg_type == type) \
368 ? SvMAGIC (sv) \
369 : mg_find (sv, type))
370
371#define CORO_MAGIC(sv, type) \
372 (expect_true (SvMAGIC (sv)) \
373 ? CORO_MAGIC_NN (sv, type) \
374 : 0)
375
376#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
377#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
378
379INLINE struct coro *
380SvSTATE_ (pTHX_ SV *coro)
381{
382 HV *stash;
383 MAGIC *mg;
904 384
905 if (SvROK (coro)) 385 if (SvROK (coro))
906 coro = SvRV (coro); 386 coro = SvRV (coro);
907 387
908 LOCK; 388 if (expect_false (SvTYPE (coro) != SVt_PVHV))
909 coro_enq (aTHX_ SvREFCNT_inc (coro)); 389 croak ("Coro::State object required");
910 UNLOCK;
911}
912 390
391 stash = SvSTASH (coro);
392 if (expect_false (stash != coro_stash && stash != coro_state_stash))
393 {
394 /* very slow, but rare, check */
395 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
396 croak ("Coro::State object required");
397 }
398
399 mg = CORO_MAGIC_state (coro);
400 return (struct coro *)mg->mg_ptr;
401}
402
403#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
404
405/* faster than SvSTATE, but expects a coroutine hv */
406#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
407#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
408
409/*****************************************************************************/
410/* padlist management and caching */
411
412static AV *
413coro_derive_padlist (pTHX_ CV *cv)
414{
415 AV *padlist = CvPADLIST (cv);
416 AV *newpadlist, *newpad;
417
418 newpadlist = newAV ();
419 AvREAL_off (newpadlist);
420#if PERL_VERSION_ATLEAST (5,10,0)
421 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
422#else
423 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
424#endif
425 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
426 --AvFILLp (padlist);
427
428 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
429 av_store (newpadlist, 1, (SV *)newpad);
430
431 return newpadlist;
432}
433
434static void
435free_padlist (pTHX_ AV *padlist)
436{
437 /* may be during global destruction */
438 if (!IN_DESTRUCT)
439 {
440 I32 i = AvFILLp (padlist);
441
442 while (i > 0) /* special-case index 0 */
443 {
444 /* we try to be extra-careful here */
445 AV *av = (AV *)AvARRAY (padlist)[i--];
446 I32 j = AvFILLp (av);
447
448 while (j >= 0)
449 SvREFCNT_dec (AvARRAY (av)[j--]);
450
451 AvFILLp (av) = -1;
452 SvREFCNT_dec (av);
453 }
454
455 SvREFCNT_dec (AvARRAY (padlist)[0]);
456
457 AvFILLp (padlist) = -1;
458 SvREFCNT_dec ((SV*)padlist);
459 }
460}
461
913static void 462static int
914api_schedule (void) 463coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
915{ 464{
465 AV *padlist;
466 AV *av = (AV *)mg->mg_obj;
467
468 /* casting is fun. */
469 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
470 free_padlist (aTHX_ padlist);
471
472 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
473
474 return 0;
475}
476
477static MGVTBL coro_cv_vtbl = {
478 0, 0, 0, 0,
479 coro_cv_free
480};
481
482/* the next two functions merely cache the padlists */
483static void
484get_padlist (pTHX_ CV *cv)
485{
486 MAGIC *mg = CORO_MAGIC_cv (cv);
487 AV *av;
488
489 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
490 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
491 else
492 {
493#if CORO_PREFER_PERL_FUNCTIONS
494 /* this is probably cleaner? but also slower! */
495 /* in practise, it seems to be less stable */
496 CV *cp = Perl_cv_clone (aTHX_ cv);
497 CvPADLIST (cv) = CvPADLIST (cp);
498 CvPADLIST (cp) = 0;
499 SvREFCNT_dec (cp);
500#else
501 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
502#endif
503 }
504}
505
506static void
507put_padlist (pTHX_ CV *cv)
508{
509 MAGIC *mg = CORO_MAGIC_cv (cv);
510 AV *av;
511
512 if (expect_false (!mg))
513 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
514
515 av = (AV *)mg->mg_obj;
516
517 if (expect_false (AvFILLp (av) >= AvMAX (av)))
518 av_extend (av, AvFILLp (av) + 1);
519
520 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
521}
522
523/** load & save, init *******************************************************/
524
525static void
526load_perl (pTHX_ Coro__State c)
527{
528 perl_slots *slot = c->slot;
529 c->slot = 0;
530
531 PL_mainstack = c->mainstack;
532
533 GvSV (PL_defgv) = slot->defsv;
534 GvAV (PL_defgv) = slot->defav;
535 GvSV (PL_errgv) = slot->errsv;
536 GvSV (irsgv) = slot->irsgv;
537 GvHV (PL_hintgv) = slot->hinthv;
538
539 #define VAR(name,type) PL_ ## name = slot->name;
540 # include "state.h"
541 #undef VAR
542
543 {
544 dSP;
545
546 CV *cv;
547
548 /* now do the ugly restore mess */
549 while (expect_true (cv = (CV *)POPs))
550 {
551 put_padlist (aTHX_ cv); /* mark this padlist as available */
552 CvDEPTH (cv) = PTR2IV (POPs);
553 CvPADLIST (cv) = (AV *)POPs;
554 }
555
556 PUTBACK;
557 }
558
559 slf_frame = c->slf_frame;
560 CORO_THROW = c->except;
561}
562
563static void
564save_perl (pTHX_ Coro__State c)
565{
566 c->except = CORO_THROW;
567 c->slf_frame = slf_frame;
568
569 {
570 dSP;
571 I32 cxix = cxstack_ix;
572 PERL_CONTEXT *ccstk = cxstack;
573 PERL_SI *top_si = PL_curstackinfo;
574
575 /*
576 * the worst thing you can imagine happens first - we have to save
577 * (and reinitialize) all cv's in the whole callchain :(
578 */
579
580 XPUSHs (Nullsv);
581 /* this loop was inspired by pp_caller */
582 for (;;)
583 {
584 while (expect_true (cxix >= 0))
585 {
586 PERL_CONTEXT *cx = &ccstk[cxix--];
587
588 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
589 {
590 CV *cv = cx->blk_sub.cv;
591
592 if (expect_true (CvDEPTH (cv)))
593 {
594 EXTEND (SP, 3);
595 PUSHs ((SV *)CvPADLIST (cv));
596 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
597 PUSHs ((SV *)cv);
598
599 CvDEPTH (cv) = 0;
600 get_padlist (aTHX_ cv);
601 }
602 }
603 }
604
605 if (expect_true (top_si->si_type == PERLSI_MAIN))
606 break;
607
608 top_si = top_si->si_prev;
609 ccstk = top_si->si_cxstack;
610 cxix = top_si->si_cxix;
611 }
612
613 PUTBACK;
614 }
615
616 /* allocate some space on the context stack for our purposes */
617 /* we manually unroll here, as usually 2 slots is enough */
618 if (SLOT_COUNT >= 1) CXINC;
619 if (SLOT_COUNT >= 2) CXINC;
620 if (SLOT_COUNT >= 3) CXINC;
621 {
622 int i;
623 for (i = 3; i < SLOT_COUNT; ++i)
624 CXINC;
625 }
626 cxstack_ix -= SLOT_COUNT; /* undo allocation */
627
628 c->mainstack = PL_mainstack;
629
630 {
631 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
632
633 slot->defav = GvAV (PL_defgv);
634 slot->defsv = DEFSV;
635 slot->errsv = ERRSV;
636 slot->irsgv = GvSV (irsgv);
637 slot->hinthv = GvHV (PL_hintgv);
638
639 #define VAR(name,type) slot->name = PL_ ## name;
640 # include "state.h"
641 #undef VAR
642 }
643}
644
645/*
646 * allocate various perl stacks. This is almost an exact copy
647 * of perl.c:init_stacks, except that it uses less memory
648 * on the (sometimes correct) assumption that coroutines do
649 * not usually need a lot of stackspace.
650 */
651#if CORO_PREFER_PERL_FUNCTIONS
652# define coro_init_stacks(thx) init_stacks ()
653#else
654static void
655coro_init_stacks (pTHX)
656{
657 PL_curstackinfo = new_stackinfo(32, 8);
658 PL_curstackinfo->si_type = PERLSI_MAIN;
659 PL_curstack = PL_curstackinfo->si_stack;
660 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
661
662 PL_stack_base = AvARRAY(PL_curstack);
663 PL_stack_sp = PL_stack_base;
664 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
665
666 New(50,PL_tmps_stack,32,SV*);
667 PL_tmps_floor = -1;
668 PL_tmps_ix = -1;
669 PL_tmps_max = 32;
670
671 New(54,PL_markstack,16,I32);
672 PL_markstack_ptr = PL_markstack;
673 PL_markstack_max = PL_markstack + 16;
674
675#ifdef SET_MARK_OFFSET
676 SET_MARK_OFFSET;
677#endif
678
679 New(54,PL_scopestack,8,I32);
680 PL_scopestack_ix = 0;
681 PL_scopestack_max = 8;
682
683 New(54,PL_savestack,24,ANY);
684 PL_savestack_ix = 0;
685 PL_savestack_max = 24;
686
687#if !PERL_VERSION_ATLEAST (5,10,0)
688 New(54,PL_retstack,4,OP*);
689 PL_retstack_ix = 0;
690 PL_retstack_max = 4;
691#endif
692}
693#endif
694
695/*
696 * destroy the stacks, the callchain etc...
697 */
698static void
699coro_destruct_stacks (pTHX)
700{
701 while (PL_curstackinfo->si_next)
702 PL_curstackinfo = PL_curstackinfo->si_next;
703
704 while (PL_curstackinfo)
705 {
706 PERL_SI *p = PL_curstackinfo->si_prev;
707
708 if (!IN_DESTRUCT)
709 SvREFCNT_dec (PL_curstackinfo->si_stack);
710
711 Safefree (PL_curstackinfo->si_cxstack);
712 Safefree (PL_curstackinfo);
713 PL_curstackinfo = p;
714 }
715
716 Safefree (PL_tmps_stack);
717 Safefree (PL_markstack);
718 Safefree (PL_scopestack);
719 Safefree (PL_savestack);
720#if !PERL_VERSION_ATLEAST (5,10,0)
721 Safefree (PL_retstack);
722#endif
723}
724
725#define CORO_RSS \
726 rss += sizeof (SYM (curstackinfo)); \
727 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
728 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
729 rss += SYM (tmps_max) * sizeof (SV *); \
730 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
731 rss += SYM (scopestack_max) * sizeof (I32); \
732 rss += SYM (savestack_max) * sizeof (ANY);
733
734static size_t
735coro_rss (pTHX_ struct coro *coro)
736{
737 size_t rss = sizeof (*coro);
738
739 if (coro->mainstack)
740 {
741 if (coro->flags & CF_RUNNING)
742 {
743 #define SYM(sym) PL_ ## sym
744 CORO_RSS;
745 #undef SYM
746 }
747 else
748 {
749 #define SYM(sym) coro->slot->sym
750 CORO_RSS;
751 #undef SYM
752 }
753 }
754
755 return rss;
756}
757
758/** coroutine stack handling ************************************************/
759
760static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
761static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
762static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
763
764/* apparently < 5.8.8 */
765#ifndef MgPV_nolen_const
766#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
767 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
768 (const char*)(mg)->mg_ptr)
769#endif
770
771/*
772 * This overrides the default magic get method of %SIG elements.
773 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
774 * and instead of tryign to save and restore the hash elements, we just provide
775 * readback here.
776 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
777 * not expecting this to actually change the hook. This is a potential problem
778 * when a schedule happens then, but we ignore this.
779 */
780static int
781coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
782{
783 const char *s = MgPV_nolen_const (mg);
784
785 if (*s == '_')
786 {
787 SV **svp = 0;
788
789 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
790 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
791
792 if (svp)
793 {
794 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
795 return 0;
796 }
797 }
798
799 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
800}
801
802static int
803coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
804{
805 const char *s = MgPV_nolen_const (mg);
806
807 if (*s == '_')
808 {
809 SV **svp = 0;
810
811 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
812 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
813
814 if (svp)
815 {
816 SV *old = *svp;
817 *svp = 0;
818 SvREFCNT_dec (old);
819 return 0;
820 }
821 }
822
823 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
824}
825
826static int
827coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
828{
829 const char *s = MgPV_nolen_const (mg);
830
831 if (*s == '_')
832 {
833 SV **svp = 0;
834
835 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
836 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
837
838 if (svp)
839 {
840 SV *old = *svp;
841 *svp = newSVsv (sv);
842 SvREFCNT_dec (old);
843 return 0;
844 }
845 }
846
847 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
848}
849
850static void
851prepare_nop (pTHX_ struct coro_transfer_args *ta)
852{
853 /* kind of mega-hacky, but works */
854 ta->next = ta->prev = (struct coro *)ta;
855}
856
857static int
858slf_check_nop (pTHX_ struct CoroSLF *frame)
859{
860 return 0;
861}
862
863static int
864slf_check_repeat (pTHX_ struct CoroSLF *frame)
865{
866 return 1;
867}
868
869static UNOP coro_setup_op;
870
871static void NOINLINE /* noinline to keep it out of the transfer fast path */
872coro_setup (pTHX_ struct coro *coro)
873{
874 /*
875 * emulate part of the perl startup here.
876 */
877 coro_init_stacks (aTHX);
878
879 PL_runops = RUNOPS_DEFAULT;
880 PL_curcop = &PL_compiling;
881 PL_in_eval = EVAL_NULL;
882 PL_comppad = 0;
883 PL_comppad_name = 0;
884 PL_comppad_name_fill = 0;
885 PL_comppad_name_floor = 0;
886 PL_curpm = 0;
887 PL_curpad = 0;
888 PL_localizing = 0;
889 PL_dirty = 0;
890 PL_restartop = 0;
891#if PERL_VERSION_ATLEAST (5,10,0)
892 PL_parser = 0;
893#endif
894 PL_hints = 0;
895
896 /* recreate the die/warn hooks */
897 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
898 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
899
900 GvSV (PL_defgv) = newSV (0);
901 GvAV (PL_defgv) = coro->args; coro->args = 0;
902 GvSV (PL_errgv) = newSV (0);
903 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
904 GvHV (PL_hintgv) = 0;
905 PL_rs = newSVsv (GvSV (irsgv));
906 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
907
908 {
909 dSP;
910 UNOP myop;
911
912 Zero (&myop, 1, UNOP);
913 myop.op_next = Nullop;
914 myop.op_type = OP_ENTERSUB;
915 myop.op_flags = OPf_WANT_VOID;
916
917 PUSHMARK (SP);
918 PUSHs ((SV *)coro->startcv);
919 PUTBACK;
920 PL_op = (OP *)&myop;
921 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
922 }
923
924 /* this newly created coroutine might be run on an existing cctx which most
925 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
926 */
927 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
928 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
929
930 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
931 coro_setup_op.op_next = PL_op;
932 coro_setup_op.op_type = OP_ENTERSUB;
933 coro_setup_op.op_ppaddr = pp_slf;
934 /* no flags etc. required, as an init function won't be called */
935
936 PL_op = (OP *)&coro_setup_op;
937
938 /* copy throw, in case it was set before coro_setup */
939 CORO_THROW = coro->except;
940}
941
942static void
943coro_unwind_stacks (pTHX)
944{
945 if (!IN_DESTRUCT)
946 {
947 /* restore all saved variables and stuff */
948 LEAVE_SCOPE (0);
949 assert (PL_tmps_floor == -1);
950
951 /* free all temporaries */
952 FREETMPS;
953 assert (PL_tmps_ix == -1);
954
955 /* unwind all extra stacks */
956 POPSTACK_TO (PL_mainstack);
957
958 /* unwind main stack */
959 dounwind (-1);
960 }
961}
962
963static void
964coro_destruct_perl (pTHX_ struct coro *coro)
965{
966 coro_unwind_stacks (aTHX);
967
968 SvREFCNT_dec (GvSV (PL_defgv));
969 SvREFCNT_dec (GvAV (PL_defgv));
970 SvREFCNT_dec (GvSV (PL_errgv));
971 SvREFCNT_dec (PL_defoutgv);
972 SvREFCNT_dec (PL_rs);
973 SvREFCNT_dec (GvSV (irsgv));
974 SvREFCNT_dec (GvHV (PL_hintgv));
975
976 SvREFCNT_dec (PL_diehook);
977 SvREFCNT_dec (PL_warnhook);
978
979 SvREFCNT_dec (coro->saved_deffh);
980 SvREFCNT_dec (coro->rouse_cb);
981 SvREFCNT_dec (coro->invoke_cb);
982 SvREFCNT_dec (coro->invoke_av);
983
984 coro_destruct_stacks (aTHX);
985}
986
987INLINE void
988free_coro_mortal (pTHX)
989{
990 if (expect_true (coro_mortal))
991 {
992 SvREFCNT_dec (coro_mortal);
993 coro_mortal = 0;
994 }
995}
996
997static int
998runops_trace (pTHX)
999{
1000 COP *oldcop = 0;
1001 int oldcxix = -2;
1002
1003 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1004 {
1005 PERL_ASYNC_CHECK ();
1006
1007 if (cctx_current->flags & CC_TRACE_ALL)
1008 {
1009 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1010 {
1011 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1012 SV **bot, **top;
1013 AV *av = newAV (); /* return values */
1014 SV **cb;
1015 dSP;
1016
1017 GV *gv = CvGV (cx->blk_sub.cv);
1018 SV *fullname = sv_2mortal (newSV (0));
1019 if (isGV (gv))
1020 gv_efullname3 (fullname, gv, 0);
1021
1022 bot = PL_stack_base + cx->blk_oldsp + 1;
1023 top = cx->blk_gimme == G_ARRAY ? SP + 1
1024 : cx->blk_gimme == G_SCALAR ? bot + 1
1025 : bot;
1026
1027 av_extend (av, top - bot);
1028 while (bot < top)
1029 av_push (av, SvREFCNT_inc_NN (*bot++));
1030
1031 PL_runops = RUNOPS_DEFAULT;
1032 ENTER;
1033 SAVETMPS;
1034 EXTEND (SP, 3);
1035 PUSHMARK (SP);
1036 PUSHs (&PL_sv_no);
1037 PUSHs (fullname);
1038 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1039 PUTBACK;
1040 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1041 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1042 SPAGAIN;
1043 FREETMPS;
1044 LEAVE;
1045 PL_runops = runops_trace;
1046 }
1047
1048 if (oldcop != PL_curcop)
1049 {
1050 oldcop = PL_curcop;
1051
1052 if (PL_curcop != &PL_compiling)
1053 {
1054 SV **cb;
1055
1056 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1057 {
1058 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1059
1060 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1061 {
1062 dSP;
1063 GV *gv = CvGV (cx->blk_sub.cv);
1064 SV *fullname = sv_2mortal (newSV (0));
1065
1066 if (isGV (gv))
1067 gv_efullname3 (fullname, gv, 0);
1068
1069 PL_runops = RUNOPS_DEFAULT;
1070 ENTER;
1071 SAVETMPS;
1072 EXTEND (SP, 3);
1073 PUSHMARK (SP);
1074 PUSHs (&PL_sv_yes);
1075 PUSHs (fullname);
1076 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1077 PUTBACK;
1078 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1079 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1080 SPAGAIN;
1081 FREETMPS;
1082 LEAVE;
1083 PL_runops = runops_trace;
1084 }
1085
1086 oldcxix = cxstack_ix;
1087 }
1088
1089 if (cctx_current->flags & CC_TRACE_LINE)
1090 {
1091 dSP;
1092
1093 PL_runops = RUNOPS_DEFAULT;
1094 ENTER;
1095 SAVETMPS;
1096 EXTEND (SP, 3);
1097 PL_runops = RUNOPS_DEFAULT;
1098 PUSHMARK (SP);
1099 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1100 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1101 PUTBACK;
1102 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1103 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1104 SPAGAIN;
1105 FREETMPS;
1106 LEAVE;
1107 PL_runops = runops_trace;
1108 }
1109 }
1110 }
1111 }
1112 }
1113
1114 TAINT_NOT;
1115 return 0;
1116}
1117
1118static struct CoroSLF cctx_ssl_frame;
1119
1120static void
1121slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1122{
1123 ta->prev = 0;
1124}
1125
1126static int
1127slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1128{
1129 *frame = cctx_ssl_frame;
1130
1131 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1132}
1133
1134/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1135static void NOINLINE
1136cctx_prepare (pTHX)
1137{
1138 PL_top_env = &PL_start_env;
1139
1140 if (cctx_current->flags & CC_TRACE)
1141 PL_runops = runops_trace;
1142
1143 /* we already must be executing an SLF op, there is no other valid way
1144 * that can lead to creation of a new cctx */
1145 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1146 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1147
1148 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1149 cctx_ssl_frame = slf_frame;
1150
1151 slf_frame.prepare = slf_prepare_set_stacklevel;
1152 slf_frame.check = slf_check_set_stacklevel;
1153}
1154
1155/* the tail of transfer: execute stuff we can only do after a transfer */
1156INLINE void
1157transfer_tail (pTHX)
1158{
1159 free_coro_mortal (aTHX);
1160}
1161
1162/*
1163 * this is a _very_ stripped down perl interpreter ;)
1164 */
1165static void
1166cctx_run (void *arg)
1167{
1168#ifdef USE_ITHREADS
1169# if CORO_PTHREAD
1170 PERL_SET_CONTEXT (coro_thx);
1171# endif
1172#endif
1173 {
916 dTHX; 1174 dTHX;
917 1175
918 SV *prev, *next; 1176 /* normally we would need to skip the entersub here */
1177 /* not doing so will re-execute it, which is exactly what we want */
1178 /* PL_nop = PL_nop->op_next */
919 1179
920 LOCK; 1180 /* inject a fake subroutine call to cctx_init */
1181 cctx_prepare (aTHX);
921 1182
1183 /* cctx_run is the alternative tail of transfer() */
1184 transfer_tail (aTHX);
1185
1186 /* somebody or something will hit me for both perl_run and PL_restartop */
1187 PL_restartop = PL_op;
1188 perl_run (PL_curinterp);
1189 /*
1190 * Unfortunately, there is no way to get at the return values of the
1191 * coro body here, as perl_run destroys these
1192 */
1193
1194 /*
1195 * If perl-run returns we assume exit() was being called or the coro
1196 * fell off the end, which seems to be the only valid (non-bug)
1197 * reason for perl_run to return. We try to exit by jumping to the
1198 * bootstrap-time "top" top_env, as we cannot restore the "main"
1199 * coroutine as Coro has no such concept.
1200 * This actually isn't valid with the pthread backend, but OSes requiring
1201 * that backend are too broken to do it in a standards-compliant way.
1202 */
1203 PL_top_env = main_top_env;
1204 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1205 }
1206}
1207
1208static coro_cctx *
1209cctx_new ()
1210{
1211 coro_cctx *cctx;
1212
1213 ++cctx_count;
1214 New (0, cctx, 1, coro_cctx);
1215
1216 cctx->gen = cctx_gen;
1217 cctx->flags = 0;
1218 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1219
1220 return cctx;
1221}
1222
1223/* create a new cctx only suitable as source */
1224static coro_cctx *
1225cctx_new_empty ()
1226{
1227 coro_cctx *cctx = cctx_new ();
1228
1229 cctx->sptr = 0;
1230 coro_create (&cctx->cctx, 0, 0, 0, 0);
1231
1232 return cctx;
1233}
1234
1235/* create a new cctx suitable as destination/running a perl interpreter */
1236static coro_cctx *
1237cctx_new_run ()
1238{
1239 coro_cctx *cctx = cctx_new ();
1240 void *stack_start;
1241 size_t stack_size;
1242
1243#if HAVE_MMAP
1244 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1245 /* mmap supposedly does allocate-on-write for us */
1246 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1247
1248 if (cctx->sptr != (void *)-1)
1249 {
1250 #if CORO_STACKGUARD
1251 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1252 #endif
1253 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1254 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1255 cctx->flags |= CC_MAPPED;
1256 }
1257 else
1258#endif
1259 {
1260 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1261 New (0, cctx->sptr, cctx_stacksize, long);
1262
1263 if (!cctx->sptr)
1264 {
1265 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1266 _exit (EXIT_FAILURE);
1267 }
1268
1269 stack_start = cctx->sptr;
1270 stack_size = cctx->ssize;
1271 }
1272
1273 #if CORO_USE_VALGRIND
1274 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1275 #endif
1276
1277 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1278
1279 return cctx;
1280}
1281
1282static void
1283cctx_destroy (coro_cctx *cctx)
1284{
1285 if (!cctx)
1286 return;
1287
1288 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1289
1290 --cctx_count;
1291 coro_destroy (&cctx->cctx);
1292
1293 /* coro_transfer creates new, empty cctx's */
1294 if (cctx->sptr)
1295 {
1296 #if CORO_USE_VALGRIND
1297 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1298 #endif
1299
1300#if HAVE_MMAP
1301 if (cctx->flags & CC_MAPPED)
1302 munmap (cctx->sptr, cctx->ssize);
1303 else
1304#endif
1305 Safefree (cctx->sptr);
1306 }
1307
1308 Safefree (cctx);
1309}
1310
1311/* wether this cctx should be destructed */
1312#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1313
1314static coro_cctx *
1315cctx_get (pTHX)
1316{
1317 while (expect_true (cctx_first))
1318 {
1319 coro_cctx *cctx = cctx_first;
1320 cctx_first = cctx->next;
1321 --cctx_idle;
1322
1323 if (expect_true (!CCTX_EXPIRED (cctx)))
1324 return cctx;
1325
1326 cctx_destroy (cctx);
1327 }
1328
1329 return cctx_new_run ();
1330}
1331
1332static void
1333cctx_put (coro_cctx *cctx)
1334{
1335 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1336
1337 /* free another cctx if overlimit */
1338 if (expect_false (cctx_idle >= cctx_max_idle))
1339 {
1340 coro_cctx *first = cctx_first;
1341 cctx_first = first->next;
1342 --cctx_idle;
1343
1344 cctx_destroy (first);
1345 }
1346
1347 ++cctx_idle;
1348 cctx->next = cctx_first;
1349 cctx_first = cctx;
1350}
1351
1352/** coroutine switching *****************************************************/
1353
1354static void
1355transfer_check (pTHX_ struct coro *prev, struct coro *next)
1356{
1357 /* TODO: throwing up here is considered harmful */
1358
1359 if (expect_true (prev != next))
1360 {
1361 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1362 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1363
1364 if (expect_false (next->flags & CF_RUNNING))
1365 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1366
1367 if (expect_false (next->flags & CF_DESTROYED))
1368 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1369
1370#if !PERL_VERSION_ATLEAST (5,10,0)
1371 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1372 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1373#endif
1374 }
1375}
1376
1377/* always use the TRANSFER macro */
1378static void NOINLINE /* noinline so we have a fixed stackframe */
1379transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1380{
1381 dSTACKLEVEL;
1382
1383 /* sometimes transfer is only called to set idle_sp */
1384 if (expect_false (!prev))
1385 {
1386 cctx_current->idle_sp = STACKLEVEL;
1387 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1388 }
1389 else if (expect_true (prev != next))
1390 {
1391 coro_cctx *cctx_prev;
1392
1393 if (expect_false (prev->flags & CF_NEW))
1394 {
1395 /* create a new empty/source context */
1396 prev->flags &= ~CF_NEW;
1397 prev->flags |= CF_RUNNING;
1398 }
1399
1400 prev->flags &= ~CF_RUNNING;
1401 next->flags |= CF_RUNNING;
1402
1403 /* first get rid of the old state */
1404 save_perl (aTHX_ prev);
1405
1406 if (expect_false (next->flags & CF_NEW))
1407 {
1408 /* need to start coroutine */
1409 next->flags &= ~CF_NEW;
1410 /* setup coroutine call */
1411 coro_setup (aTHX_ next);
1412 }
1413 else
1414 load_perl (aTHX_ next);
1415
1416 /* possibly untie and reuse the cctx */
1417 if (expect_true (
1418 cctx_current->idle_sp == STACKLEVEL
1419 && !(cctx_current->flags & CC_TRACE)
1420 && !force_cctx
1421 ))
1422 {
1423 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1424 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1425
1426 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1427 /* without this the next cctx_get might destroy the running cctx while still in use */
1428 if (expect_false (CCTX_EXPIRED (cctx_current)))
1429 if (expect_true (!next->cctx))
1430 next->cctx = cctx_get (aTHX);
1431
1432 cctx_put (cctx_current);
1433 }
1434 else
1435 prev->cctx = cctx_current;
1436
1437 ++next->usecount;
1438
1439 cctx_prev = cctx_current;
1440 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1441
1442 next->cctx = 0;
1443
1444 if (expect_false (cctx_prev != cctx_current))
1445 {
1446 cctx_prev->top_env = PL_top_env;
1447 PL_top_env = cctx_current->top_env;
1448 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1449 }
1450
1451 transfer_tail (aTHX);
1452 }
1453}
1454
1455#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1456#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1457
1458/** high level stuff ********************************************************/
1459
1460static int
1461coro_state_destroy (pTHX_ struct coro *coro)
1462{
1463 if (coro->flags & CF_DESTROYED)
1464 return 0;
1465
1466 if (coro->on_destroy)
1467 coro->on_destroy (aTHX_ coro);
1468
1469 coro->flags |= CF_DESTROYED;
1470
1471 if (coro->flags & CF_READY)
1472 {
1473 /* reduce nready, as destroying a ready coro effectively unreadies it */
1474 /* alternative: look through all ready queues and remove the coro */
1475 --coro_nready;
1476 }
1477 else
1478 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1479
1480 if (coro->mainstack
1481 && coro->mainstack != main_mainstack
1482 && coro->slot
1483 && !PL_dirty)
1484 {
1485 struct coro temp;
1486
1487 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1488
1489 save_perl (aTHX_ &temp);
1490 load_perl (aTHX_ coro);
1491
1492 coro_destruct_perl (aTHX_ coro);
1493
1494 load_perl (aTHX_ &temp);
1495
1496 coro->slot = 0;
1497 }
1498
1499 cctx_destroy (coro->cctx);
1500 SvREFCNT_dec (coro->startcv);
1501 SvREFCNT_dec (coro->args);
1502 SvREFCNT_dec (CORO_THROW);
1503
1504 if (coro->next) coro->next->prev = coro->prev;
1505 if (coro->prev) coro->prev->next = coro->next;
1506 if (coro == coro_first) coro_first = coro->next;
1507
1508 return 1;
1509}
1510
1511static int
1512coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1513{
1514 struct coro *coro = (struct coro *)mg->mg_ptr;
1515 mg->mg_ptr = 0;
1516
1517 coro->hv = 0;
1518
1519 if (--coro->refcnt < 0)
1520 {
1521 coro_state_destroy (aTHX_ coro);
1522 Safefree (coro);
1523 }
1524
1525 return 0;
1526}
1527
1528static int
1529coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1530{
1531 struct coro *coro = (struct coro *)mg->mg_ptr;
1532
1533 ++coro->refcnt;
1534
1535 return 0;
1536}
1537
1538static MGVTBL coro_state_vtbl = {
1539 0, 0, 0, 0,
1540 coro_state_free,
1541 0,
1542#ifdef MGf_DUP
1543 coro_state_dup,
1544#else
1545# define MGf_DUP 0
1546#endif
1547};
1548
1549static void
1550prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1551{
1552 ta->prev = SvSTATE (prev_sv);
1553 ta->next = SvSTATE (next_sv);
1554 TRANSFER_CHECK (*ta);
1555}
1556
1557static void
1558api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1559{
1560 struct coro_transfer_args ta;
1561
1562 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1563 TRANSFER (ta, 1);
1564}
1565
1566/*****************************************************************************/
1567/* gensub: simple closure generation utility */
1568
1569#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1570
1571/* create a closure from XS, returns a code reference */
1572/* the arg can be accessed via GENSUB_ARG from the callback */
1573/* the callback must use dXSARGS/XSRETURN */
1574static SV *
1575gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1576{
1577 CV *cv = (CV *)newSV (0);
1578
1579 sv_upgrade ((SV *)cv, SVt_PVCV);
1580
1581 CvANON_on (cv);
1582 CvISXSUB_on (cv);
1583 CvXSUB (cv) = xsub;
1584 GENSUB_ARG = arg;
1585
1586 return newRV_noinc ((SV *)cv);
1587}
1588
1589/** Coro ********************************************************************/
1590
1591INLINE void
1592coro_enq (pTHX_ struct coro *coro)
1593{
1594 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1595}
1596
1597INLINE SV *
1598coro_deq (pTHX)
1599{
1600 int prio;
1601
1602 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1603 if (AvFILLp (coro_ready [prio]) >= 0)
1604 return av_shift (coro_ready [prio]);
1605
1606 return 0;
1607}
1608
1609static int
1610api_ready (pTHX_ SV *coro_sv)
1611{
1612 struct coro *coro;
1613 SV *sv_hook;
1614 void (*xs_hook)(void);
1615
1616 coro = SvSTATE (coro_sv);
1617
1618 if (coro->flags & CF_READY)
1619 return 0;
1620
1621 coro->flags |= CF_READY;
1622
1623 sv_hook = coro_nready ? 0 : coro_readyhook;
1624 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1625
1626 coro_enq (aTHX_ coro);
1627 ++coro_nready;
1628
1629 if (sv_hook)
1630 {
1631 dSP;
1632
1633 ENTER;
1634 SAVETMPS;
1635
1636 PUSHMARK (SP);
1637 PUTBACK;
1638 call_sv (sv_hook, G_VOID | G_DISCARD);
1639
1640 FREETMPS;
1641 LEAVE;
1642 }
1643
1644 if (xs_hook)
1645 xs_hook ();
1646
1647 return 1;
1648}
1649
1650static int
1651api_is_ready (pTHX_ SV *coro_sv)
1652{
1653 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1654}
1655
1656/* expects to own a reference to next->hv */
1657INLINE void
1658prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1659{
922 prev = SvRV (GvSV (coro_current)); 1660 SV *prev_sv = SvRV (coro_current);
923 next = coro_deq (aTHX_ PRIO_MIN);
924 1661
925 if (!next) 1662 ta->prev = SvSTATE_hv (prev_sv);
926 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1663 ta->next = next;
927 1664
928 /* free this only after the transfer */ 1665 TRANSFER_CHECK (*ta);
1666
1667 SvRV_set (coro_current, (SV *)next->hv);
1668
1669 free_coro_mortal (aTHX);
929 coro_mortal = prev; 1670 coro_mortal = prev_sv;
930 SV_CORO (prev, "Coro::schedule");
931
932 SvRV (GvSV (coro_current)) = next;
933
934 SV_CORO (next, "Coro::schedule");
935
936 UNLOCK;
937
938 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
939 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
940} 1671}
941 1672
942static void 1673static void
943api_cede (void) 1674prepare_schedule (pTHX_ struct coro_transfer_args *ta)
944{ 1675{
945 dTHX; 1676 for (;;)
1677 {
1678 SV *next_sv = coro_deq (aTHX);
946 1679
947 LOCK; 1680 if (expect_true (next_sv))
948 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1681 {
949 UNLOCK; 1682 struct coro *next = SvSTATE_hv (next_sv);
950 1683
1684 /* cannot transfer to destroyed coros, skip and look for next */
1685 if (expect_false (next->flags & CF_DESTROYED))
1686 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1687 else
1688 {
1689 next->flags &= ~CF_READY;
1690 --coro_nready;
1691
1692 prepare_schedule_to (aTHX_ ta, next);
1693 break;
1694 }
1695 }
1696 else
1697 {
1698 /* nothing to schedule: call the idle handler */
1699 if (SvROK (sv_idle)
1700 && SvOBJECT (SvRV (sv_idle)))
1701 {
1702 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1703 api_ready (aTHX_ SvRV (sv_idle));
1704 --coro_nready;
1705 }
1706 else
1707 {
1708 dSP;
1709
1710 ENTER;
1711 SAVETMPS;
1712
1713 PUSHMARK (SP);
1714 PUTBACK;
1715 call_sv (sv_idle, G_VOID | G_DISCARD);
1716
1717 FREETMPS;
1718 LEAVE;
1719 }
1720 }
1721 }
1722}
1723
1724INLINE void
1725prepare_cede (pTHX_ struct coro_transfer_args *ta)
1726{
1727 api_ready (aTHX_ coro_current);
1728 prepare_schedule (aTHX_ ta);
1729}
1730
1731INLINE void
1732prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1733{
1734 SV *prev = SvRV (coro_current);
1735
1736 if (coro_nready)
1737 {
1738 prepare_schedule (aTHX_ ta);
1739 api_ready (aTHX_ prev);
1740 }
1741 else
1742 prepare_nop (aTHX_ ta);
1743}
1744
1745static void
951 api_schedule (); 1746api_schedule (pTHX)
952} 1747{
1748 struct coro_transfer_args ta;
953 1749
1750 prepare_schedule (aTHX_ &ta);
1751 TRANSFER (ta, 1);
1752}
1753
1754static void
1755api_schedule_to (pTHX_ SV *coro_sv)
1756{
1757 struct coro_transfer_args ta;
1758 struct coro *next = SvSTATE (coro_sv);
1759
1760 SvREFCNT_inc_NN (coro_sv);
1761 prepare_schedule_to (aTHX_ &ta, next);
1762}
1763
1764static int
1765api_cede (pTHX)
1766{
1767 struct coro_transfer_args ta;
1768
1769 prepare_cede (aTHX_ &ta);
1770
1771 if (expect_true (ta.prev != ta.next))
1772 {
1773 TRANSFER (ta, 1);
1774 return 1;
1775 }
1776 else
1777 return 0;
1778}
1779
1780static int
1781api_cede_notself (pTHX)
1782{
1783 if (coro_nready)
1784 {
1785 struct coro_transfer_args ta;
1786
1787 prepare_cede_notself (aTHX_ &ta);
1788 TRANSFER (ta, 1);
1789 return 1;
1790 }
1791 else
1792 return 0;
1793}
1794
1795static void
1796api_trace (pTHX_ SV *coro_sv, int flags)
1797{
1798 struct coro *coro = SvSTATE (coro_sv);
1799
1800 if (coro->flags & CF_RUNNING)
1801 croak ("cannot enable tracing on a running coroutine, caught");
1802
1803 if (flags & CC_TRACE)
1804 {
1805 if (!coro->cctx)
1806 coro->cctx = cctx_new_run ();
1807 else if (!(coro->cctx->flags & CC_TRACE))
1808 croak ("cannot enable tracing on coroutine with custom stack, caught");
1809
1810 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1811 }
1812 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1813 {
1814 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1815
1816 if (coro->flags & CF_RUNNING)
1817 PL_runops = RUNOPS_DEFAULT;
1818 else
1819 coro->slot->runops = RUNOPS_DEFAULT;
1820 }
1821}
1822
1823static void
1824coro_call_on_destroy (pTHX_ struct coro *coro)
1825{
1826 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1827 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1828
1829 if (on_destroyp)
1830 {
1831 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1832
1833 while (AvFILLp (on_destroy) >= 0)
1834 {
1835 dSP; /* don't disturb outer sp */
1836 SV *cb = av_pop (on_destroy);
1837
1838 PUSHMARK (SP);
1839
1840 if (statusp)
1841 {
1842 int i;
1843 AV *status = (AV *)SvRV (*statusp);
1844 EXTEND (SP, AvFILLp (status) + 1);
1845
1846 for (i = 0; i <= AvFILLp (status); ++i)
1847 PUSHs (AvARRAY (status)[i]);
1848 }
1849
1850 PUTBACK;
1851 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1852 }
1853 }
1854}
1855
1856static void
1857slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1858{
1859 int i;
1860 HV *hv = (HV *)SvRV (coro_current);
1861 AV *av = newAV ();
1862
1863 av_extend (av, items - 1);
1864 for (i = 0; i < items; ++i)
1865 av_push (av, SvREFCNT_inc_NN (arg [i]));
1866
1867 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1868
1869 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1870 api_ready (aTHX_ sv_manager);
1871
1872 frame->prepare = prepare_schedule;
1873 frame->check = slf_check_repeat;
1874
1875 /* as a minor optimisation, we could unwind all stacks here */
1876 /* but that puts extra pressure on pp_slf, and is not worth much */
1877 /*coro_unwind_stacks (aTHX);*/
1878}
1879
1880/*****************************************************************************/
1881/* async pool handler */
1882
1883static int
1884slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1885{
1886 HV *hv = (HV *)SvRV (coro_current);
1887 struct coro *coro = (struct coro *)frame->data;
1888
1889 if (!coro->invoke_cb)
1890 return 1; /* loop till we have invoke */
1891 else
1892 {
1893 hv_store (hv, "desc", sizeof ("desc") - 1,
1894 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1895
1896 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1897
1898 {
1899 dSP;
1900 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1901 PUTBACK;
1902 }
1903
1904 SvREFCNT_dec (GvAV (PL_defgv));
1905 GvAV (PL_defgv) = coro->invoke_av;
1906 coro->invoke_av = 0;
1907
1908 return 0;
1909 }
1910}
1911
1912static void
1913slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1914{
1915 HV *hv = (HV *)SvRV (coro_current);
1916 struct coro *coro = SvSTATE_hv ((SV *)hv);
1917
1918 if (expect_true (coro->saved_deffh))
1919 {
1920 /* subsequent iteration */
1921 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1922 coro->saved_deffh = 0;
1923
1924 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1925 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1926 {
1927 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1928 coro->invoke_av = newAV ();
1929
1930 frame->prepare = prepare_nop;
1931 }
1932 else
1933 {
1934 av_clear (GvAV (PL_defgv));
1935 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1936
1937 coro->prio = 0;
1938
1939 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1940 api_trace (aTHX_ coro_current, 0);
1941
1942 frame->prepare = prepare_schedule;
1943 av_push (av_async_pool, SvREFCNT_inc (hv));
1944 }
1945 }
1946 else
1947 {
1948 /* first iteration, simply fall through */
1949 frame->prepare = prepare_nop;
1950 }
1951
1952 frame->check = slf_check_pool_handler;
1953 frame->data = (void *)coro;
1954}
1955
1956/*****************************************************************************/
1957/* rouse callback */
1958
1959#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1960
1961static void
1962coro_rouse_callback (pTHX_ CV *cv)
1963{
1964 dXSARGS;
1965 SV *data = (SV *)GENSUB_ARG;
1966
1967 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1968 {
1969 /* first call, set args */
1970 AV *av = newAV ();
1971 SV *coro = SvRV (data);
1972
1973 SvRV_set (data, (SV *)av);
1974 api_ready (aTHX_ coro);
1975 SvREFCNT_dec (coro);
1976
1977 /* better take a full copy of the arguments */
1978 while (items--)
1979 av_store (av, items, newSVsv (ST (items)));
1980 }
1981
1982 XSRETURN_EMPTY;
1983}
1984
1985static int
1986slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1987{
1988 SV *data = (SV *)frame->data;
1989
1990 if (CORO_THROW)
1991 return 0;
1992
1993 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1994 return 1;
1995
1996 /* now push all results on the stack */
1997 {
1998 dSP;
1999 AV *av = (AV *)SvRV (data);
2000 int i;
2001
2002 EXTEND (SP, AvFILLp (av) + 1);
2003 for (i = 0; i <= AvFILLp (av); ++i)
2004 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2005
2006 /* we have stolen the elements, so ste length to zero and free */
2007 AvFILLp (av) = -1;
2008 av_undef (av);
2009
2010 PUTBACK;
2011 }
2012
2013 return 0;
2014}
2015
2016static void
2017slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2018{
2019 SV *cb;
2020
2021 if (items)
2022 cb = arg [0];
2023 else
2024 {
2025 struct coro *coro = SvSTATE_current;
2026
2027 if (!coro->rouse_cb)
2028 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2029
2030 cb = sv_2mortal (coro->rouse_cb);
2031 coro->rouse_cb = 0;
2032 }
2033
2034 if (!SvROK (cb)
2035 || SvTYPE (SvRV (cb)) != SVt_PVCV
2036 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2037 croak ("Coro::rouse_wait called with illegal callback argument,");
2038
2039 {
2040 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2041 SV *data = (SV *)GENSUB_ARG;
2042
2043 frame->data = (void *)data;
2044 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2045 frame->check = slf_check_rouse_wait;
2046 }
2047}
2048
2049static SV *
2050coro_new_rouse_cb (pTHX)
2051{
2052 HV *hv = (HV *)SvRV (coro_current);
2053 struct coro *coro = SvSTATE_hv (hv);
2054 SV *data = newRV_inc ((SV *)hv);
2055 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2056
2057 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2058 SvREFCNT_dec (data); /* magicext increases the refcount */
2059
2060 SvREFCNT_dec (coro->rouse_cb);
2061 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2062
2063 return cb;
2064}
2065
2066/*****************************************************************************/
2067/* schedule-like-function opcode (SLF) */
2068
2069static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2070static const CV *slf_cv;
2071static SV **slf_argv;
2072static int slf_argc, slf_arga; /* count, allocated */
2073static I32 slf_ax; /* top of stack, for restore */
2074
2075/* this restores the stack in the case we patched the entersub, to */
2076/* recreate the stack frame as perl will on following calls */
2077/* since entersub cleared the stack */
2078static OP *
2079pp_restore (pTHX)
2080{
2081 int i;
2082 SV **SP = PL_stack_base + slf_ax;
2083
2084 PUSHMARK (SP);
2085
2086 EXTEND (SP, slf_argc + 1);
2087
2088 for (i = 0; i < slf_argc; ++i)
2089 PUSHs (sv_2mortal (slf_argv [i]));
2090
2091 PUSHs ((SV *)CvGV (slf_cv));
2092
2093 RETURNOP (slf_restore.op_first);
2094}
2095
2096static void
2097slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2098{
2099 SV **arg = (SV **)slf_frame.data;
2100
2101 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2102}
2103
2104static void
2105slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2106{
2107 if (items != 2)
2108 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2109
2110 frame->prepare = slf_prepare_transfer;
2111 frame->check = slf_check_nop;
2112 frame->data = (void *)arg; /* let's hope it will stay valid */
2113}
2114
2115static void
2116slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2117{
2118 frame->prepare = prepare_schedule;
2119 frame->check = slf_check_nop;
2120}
2121
2122static void
2123slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2124{
2125 struct coro *next = (struct coro *)slf_frame.data;
2126
2127 SvREFCNT_inc_NN (next->hv);
2128 prepare_schedule_to (aTHX_ ta, next);
2129}
2130
2131static void
2132slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2133{
2134 if (!items)
2135 croak ("Coro::schedule_to expects a coroutine argument, caught");
2136
2137 frame->data = (void *)SvSTATE (arg [0]);
2138 frame->prepare = slf_prepare_schedule_to;
2139 frame->check = slf_check_nop;
2140}
2141
2142static void
2143slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2144{
2145 api_ready (aTHX_ SvRV (coro_current));
2146
2147 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2148}
2149
2150static void
2151slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2152{
2153 frame->prepare = prepare_cede;
2154 frame->check = slf_check_nop;
2155}
2156
2157static void
2158slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2159{
2160 frame->prepare = prepare_cede_notself;
2161 frame->check = slf_check_nop;
2162}
2163
2164/*
2165 * these not obviously related functions are all rolled into one
2166 * function to increase chances that they all will call transfer with the same
2167 * stack offset
2168 * SLF stands for "schedule-like-function".
2169 */
2170static OP *
2171pp_slf (pTHX)
2172{
2173 I32 checkmark; /* mark SP to see how many elements check has pushed */
2174
2175 /* set up the slf frame, unless it has already been set-up */
2176 /* the latter happens when a new coro has been started */
2177 /* or when a new cctx was attached to an existing coroutine */
2178 if (expect_true (!slf_frame.prepare))
2179 {
2180 /* first iteration */
2181 dSP;
2182 SV **arg = PL_stack_base + TOPMARK + 1;
2183 int items = SP - arg; /* args without function object */
2184 SV *gv = *sp;
2185
2186 /* do a quick consistency check on the "function" object, and if it isn't */
2187 /* for us, divert to the real entersub */
2188 if (SvTYPE (gv) != SVt_PVGV
2189 || !GvCV (gv)
2190 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2191 return PL_ppaddr[OP_ENTERSUB](aTHX);
2192
2193 if (!(PL_op->op_flags & OPf_STACKED))
2194 {
2195 /* ampersand-form of call, use @_ instead of stack */
2196 AV *av = GvAV (PL_defgv);
2197 arg = AvARRAY (av);
2198 items = AvFILLp (av) + 1;
2199 }
2200
2201 /* now call the init function, which needs to set up slf_frame */
2202 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2203 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2204
2205 /* pop args */
2206 SP = PL_stack_base + POPMARK;
2207
2208 PUTBACK;
2209 }
2210
2211 /* now that we have a slf_frame, interpret it! */
2212 /* we use a callback system not to make the code needlessly */
2213 /* complicated, but so we can run multiple perl coros from one cctx */
2214
2215 do
2216 {
2217 struct coro_transfer_args ta;
2218
2219 slf_frame.prepare (aTHX_ &ta);
2220 TRANSFER (ta, 0);
2221
2222 checkmark = PL_stack_sp - PL_stack_base;
2223 }
2224 while (slf_frame.check (aTHX_ &slf_frame));
2225
2226 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2227
2228 /* exception handling */
2229 if (expect_false (CORO_THROW))
2230 {
2231 SV *exception = sv_2mortal (CORO_THROW);
2232
2233 CORO_THROW = 0;
2234 sv_setsv (ERRSV, exception);
2235 croak (0);
2236 }
2237
2238 /* return value handling - mostly like entersub */
2239 /* make sure we put something on the stack in scalar context */
2240 if (GIMME_V == G_SCALAR)
2241 {
2242 dSP;
2243 SV **bot = PL_stack_base + checkmark;
2244
2245 if (sp == bot) /* too few, push undef */
2246 bot [1] = &PL_sv_undef;
2247 else if (sp != bot + 1) /* too many, take last one */
2248 bot [1] = *sp;
2249
2250 SP = bot + 1;
2251
2252 PUTBACK;
2253 }
2254
2255 return NORMAL;
2256}
2257
2258static void
2259api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2260{
2261 int i;
2262 SV **arg = PL_stack_base + ax;
2263 int items = PL_stack_sp - arg + 1;
2264
2265 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2266
2267 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2268 && PL_op->op_ppaddr != pp_slf)
2269 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2270
2271 CvFLAGS (cv) |= CVf_SLF;
2272 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2273 slf_cv = cv;
2274
2275 /* we patch the op, and then re-run the whole call */
2276 /* we have to put the same argument on the stack for this to work */
2277 /* and this will be done by pp_restore */
2278 slf_restore.op_next = (OP *)&slf_restore;
2279 slf_restore.op_type = OP_CUSTOM;
2280 slf_restore.op_ppaddr = pp_restore;
2281 slf_restore.op_first = PL_op;
2282
2283 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2284
2285 if (PL_op->op_flags & OPf_STACKED)
2286 {
2287 if (items > slf_arga)
2288 {
2289 slf_arga = items;
2290 free (slf_argv);
2291 slf_argv = malloc (slf_arga * sizeof (SV *));
2292 }
2293
2294 slf_argc = items;
2295
2296 for (i = 0; i < items; ++i)
2297 slf_argv [i] = SvREFCNT_inc (arg [i]);
2298 }
2299 else
2300 slf_argc = 0;
2301
2302 PL_op->op_ppaddr = pp_slf;
2303 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2304
2305 PL_op = (OP *)&slf_restore;
2306}
2307
2308/*****************************************************************************/
2309/* PerlIO::cede */
2310
2311typedef struct
2312{
2313 PerlIOBuf base;
2314 NV next, every;
2315} PerlIOCede;
2316
2317static IV
2318PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2319{
2320 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2321
2322 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2323 self->next = nvtime () + self->every;
2324
2325 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2326}
2327
2328static SV *
2329PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2330{
2331 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2332
2333 return newSVnv (self->every);
2334}
2335
2336static IV
2337PerlIOCede_flush (pTHX_ PerlIO *f)
2338{
2339 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2340 double now = nvtime ();
2341
2342 if (now >= self->next)
2343 {
2344 api_cede (aTHX);
2345 self->next = now + self->every;
2346 }
2347
2348 return PerlIOBuf_flush (aTHX_ f);
2349}
2350
2351static PerlIO_funcs PerlIO_cede =
2352{
2353 sizeof(PerlIO_funcs),
2354 "cede",
2355 sizeof(PerlIOCede),
2356 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2357 PerlIOCede_pushed,
2358 PerlIOBuf_popped,
2359 PerlIOBuf_open,
2360 PerlIOBase_binmode,
2361 PerlIOCede_getarg,
2362 PerlIOBase_fileno,
2363 PerlIOBuf_dup,
2364 PerlIOBuf_read,
2365 PerlIOBuf_unread,
2366 PerlIOBuf_write,
2367 PerlIOBuf_seek,
2368 PerlIOBuf_tell,
2369 PerlIOBuf_close,
2370 PerlIOCede_flush,
2371 PerlIOBuf_fill,
2372 PerlIOBase_eof,
2373 PerlIOBase_error,
2374 PerlIOBase_clearerr,
2375 PerlIOBase_setlinebuf,
2376 PerlIOBuf_get_base,
2377 PerlIOBuf_bufsiz,
2378 PerlIOBuf_get_ptr,
2379 PerlIOBuf_get_cnt,
2380 PerlIOBuf_set_ptrcnt,
2381};
2382
2383/*****************************************************************************/
2384/* Coro::Semaphore & Coro::Signal */
2385
2386static SV *
2387coro_waitarray_new (pTHX_ int count)
2388{
2389 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2390 AV *av = newAV ();
2391 SV **ary;
2392
2393 /* unfortunately, building manually saves memory */
2394 Newx (ary, 2, SV *);
2395 AvALLOC (av) = ary;
2396#if PERL_VERSION_ATLEAST (5,10,0)
2397 AvARRAY (av) = ary;
2398#else
2399 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2400 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2401 SvPVX ((SV *)av) = (char *)ary;
2402#endif
2403 AvMAX (av) = 1;
2404 AvFILLp (av) = 0;
2405 ary [0] = newSViv (count);
2406
2407 return newRV_noinc ((SV *)av);
2408}
2409
2410/* semaphore */
2411
2412static void
2413coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2414{
2415 SV *count_sv = AvARRAY (av)[0];
2416 IV count = SvIVX (count_sv);
2417
2418 count += adjust;
2419 SvIVX (count_sv) = count;
2420
2421 /* now wake up as many waiters as are expected to lock */
2422 while (count > 0 && AvFILLp (av) > 0)
2423 {
2424 SV *cb;
2425
2426 /* swap first two elements so we can shift a waiter */
2427 AvARRAY (av)[0] = AvARRAY (av)[1];
2428 AvARRAY (av)[1] = count_sv;
2429 cb = av_shift (av);
2430
2431 if (SvOBJECT (cb))
2432 {
2433 api_ready (aTHX_ cb);
2434 --count;
2435 }
2436 else if (SvTYPE (cb) == SVt_PVCV)
2437 {
2438 dSP;
2439 PUSHMARK (SP);
2440 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2441 PUTBACK;
2442 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2443 }
2444
2445 SvREFCNT_dec (cb);
2446 }
2447}
2448
2449static void
2450coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2451{
2452 /* call $sem->adjust (0) to possibly wake up some other waiters */
2453 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2454}
2455
2456static int
2457slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2458{
2459 AV *av = (AV *)frame->data;
2460 SV *count_sv = AvARRAY (av)[0];
2461
2462 /* if we are about to throw, don't actually acquire the lock, just throw */
2463 if (CORO_THROW)
2464 return 0;
2465 else if (SvIVX (count_sv) > 0)
2466 {
2467 SvSTATE_current->on_destroy = 0;
2468
2469 if (acquire)
2470 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2471 else
2472 coro_semaphore_adjust (aTHX_ av, 0);
2473
2474 return 0;
2475 }
2476 else
2477 {
2478 int i;
2479 /* if we were woken up but can't down, we look through the whole */
2480 /* waiters list and only add us if we aren't in there already */
2481 /* this avoids some degenerate memory usage cases */
2482
2483 for (i = 1; i <= AvFILLp (av); ++i)
2484 if (AvARRAY (av)[i] == SvRV (coro_current))
2485 return 1;
2486
2487 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2488 return 1;
2489 }
2490}
2491
2492static int
2493slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2494{
2495 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2496}
2497
2498static int
2499slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2500{
2501 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2502}
2503
2504static void
2505slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2506{
2507 AV *av = (AV *)SvRV (arg [0]);
2508
2509 if (SvIVX (AvARRAY (av)[0]) > 0)
2510 {
2511 frame->data = (void *)av;
2512 frame->prepare = prepare_nop;
2513 }
2514 else
2515 {
2516 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2517
2518 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2519 frame->prepare = prepare_schedule;
2520
2521 /* to avoid race conditions when a woken-up coro gets terminated */
2522 /* we arrange for a temporary on_destroy that calls adjust (0) */
2523 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2524 }
2525}
2526
2527static void
2528slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2529{
2530 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2531 frame->check = slf_check_semaphore_down;
2532}
2533
2534static void
2535slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2536{
2537 if (items >= 2)
2538 {
2539 /* callback form */
2540 AV *av = (AV *)SvRV (arg [0]);
2541 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2542
2543 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2544
2545 if (SvIVX (AvARRAY (av)[0]) > 0)
2546 coro_semaphore_adjust (aTHX_ av, 0);
2547
2548 frame->prepare = prepare_nop;
2549 frame->check = slf_check_nop;
2550 }
2551 else
2552 {
2553 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2554 frame->check = slf_check_semaphore_wait;
2555 }
2556}
2557
2558/* signal */
2559
2560static void
2561coro_signal_wake (pTHX_ AV *av, int count)
2562{
2563 SvIVX (AvARRAY (av)[0]) = 0;
2564
2565 /* now signal count waiters */
2566 while (count > 0 && AvFILLp (av) > 0)
2567 {
2568 SV *cb;
2569
2570 /* swap first two elements so we can shift a waiter */
2571 cb = AvARRAY (av)[0];
2572 AvARRAY (av)[0] = AvARRAY (av)[1];
2573 AvARRAY (av)[1] = cb;
2574
2575 cb = av_shift (av);
2576
2577 api_ready (aTHX_ cb);
2578 sv_setiv (cb, 0); /* signal waiter */
2579 SvREFCNT_dec (cb);
2580
2581 --count;
2582 }
2583}
2584
2585static int
2586slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2587{
2588 /* if we are about to throw, also stop waiting */
2589 return SvROK ((SV *)frame->data) && !CORO_THROW;
2590}
2591
2592static void
2593slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2594{
2595 AV *av = (AV *)SvRV (arg [0]);
2596
2597 if (SvIVX (AvARRAY (av)[0]))
2598 {
2599 SvIVX (AvARRAY (av)[0]) = 0;
2600 frame->prepare = prepare_nop;
2601 frame->check = slf_check_nop;
2602 }
2603 else
2604 {
2605 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2606
2607 av_push (av, waiter);
2608
2609 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2610 frame->prepare = prepare_schedule;
2611 frame->check = slf_check_signal_wait;
2612 }
2613}
2614
2615/*****************************************************************************/
2616/* Coro::AIO */
2617
2618#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2619
2620/* helper storage struct */
2621struct io_state
2622{
2623 int errorno;
2624 I32 laststype; /* U16 in 5.10.0 */
2625 int laststatval;
2626 Stat_t statcache;
2627};
2628
2629static void
2630coro_aio_callback (pTHX_ CV *cv)
2631{
2632 dXSARGS;
2633 AV *state = (AV *)GENSUB_ARG;
2634 SV *coro = av_pop (state);
2635 SV *data_sv = newSV (sizeof (struct io_state));
2636
2637 av_extend (state, items - 1);
2638
2639 sv_upgrade (data_sv, SVt_PV);
2640 SvCUR_set (data_sv, sizeof (struct io_state));
2641 SvPOK_only (data_sv);
2642
2643 {
2644 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2645
2646 data->errorno = errno;
2647 data->laststype = PL_laststype;
2648 data->laststatval = PL_laststatval;
2649 data->statcache = PL_statcache;
2650 }
2651
2652 /* now build the result vector out of all the parameters and the data_sv */
2653 {
2654 int i;
2655
2656 for (i = 0; i < items; ++i)
2657 av_push (state, SvREFCNT_inc_NN (ST (i)));
2658 }
2659
2660 av_push (state, data_sv);
2661
2662 api_ready (aTHX_ coro);
2663 SvREFCNT_dec (coro);
2664 SvREFCNT_dec ((AV *)state);
2665}
2666
2667static int
2668slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2669{
2670 AV *state = (AV *)frame->data;
2671
2672 /* if we are about to throw, return early */
2673 /* this does not cancel the aio request, but at least */
2674 /* it quickly returns */
2675 if (CORO_THROW)
2676 return 0;
2677
2678 /* one element that is an RV? repeat! */
2679 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2680 return 1;
2681
2682 /* restore status */
2683 {
2684 SV *data_sv = av_pop (state);
2685 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2686
2687 errno = data->errorno;
2688 PL_laststype = data->laststype;
2689 PL_laststatval = data->laststatval;
2690 PL_statcache = data->statcache;
2691
2692 SvREFCNT_dec (data_sv);
2693 }
2694
2695 /* push result values */
2696 {
2697 dSP;
2698 int i;
2699
2700 EXTEND (SP, AvFILLp (state) + 1);
2701 for (i = 0; i <= AvFILLp (state); ++i)
2702 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2703
2704 PUTBACK;
2705 }
2706
2707 return 0;
2708}
2709
2710static void
2711slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2712{
2713 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2714 SV *coro_hv = SvRV (coro_current);
2715 struct coro *coro = SvSTATE_hv (coro_hv);
2716
2717 /* put our coroutine id on the state arg */
2718 av_push (state, SvREFCNT_inc_NN (coro_hv));
2719
2720 /* first see whether we have a non-zero priority and set it as AIO prio */
2721 if (coro->prio)
2722 {
2723 dSP;
2724
2725 static SV *prio_cv;
2726 static SV *prio_sv;
2727
2728 if (expect_false (!prio_cv))
2729 {
2730 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2731 prio_sv = newSViv (0);
2732 }
2733
2734 PUSHMARK (SP);
2735 sv_setiv (prio_sv, coro->prio);
2736 XPUSHs (prio_sv);
2737
2738 PUTBACK;
2739 call_sv (prio_cv, G_VOID | G_DISCARD);
2740 }
2741
2742 /* now call the original request */
2743 {
2744 dSP;
2745 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2746 int i;
2747
2748 PUSHMARK (SP);
2749
2750 /* first push all args to the stack */
2751 EXTEND (SP, items + 1);
2752
2753 for (i = 0; i < items; ++i)
2754 PUSHs (arg [i]);
2755
2756 /* now push the callback closure */
2757 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2758
2759 /* now call the AIO function - we assume our request is uncancelable */
2760 PUTBACK;
2761 call_sv ((SV *)req, G_VOID | G_DISCARD);
2762 }
2763
2764 /* now that the requets is going, we loop toll we have a result */
2765 frame->data = (void *)state;
2766 frame->prepare = prepare_schedule;
2767 frame->check = slf_check_aio_req;
2768}
2769
2770static void
2771coro_aio_req_xs (pTHX_ CV *cv)
2772{
2773 dXSARGS;
2774
2775 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2776
2777 XSRETURN_EMPTY;
2778}
2779
2780/*****************************************************************************/
2781
2782#if CORO_CLONE
2783# include "clone.c"
2784#endif
2785
954MODULE = Coro::State PACKAGE = Coro::State 2786MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
955 2787
956PROTOTYPES: ENABLE 2788PROTOTYPES: DISABLE
957 2789
958BOOT: 2790BOOT:
959{ /* {} necessary for stoopid perl-5.6.x */ 2791{
960#ifdef USE_ITHREADS 2792#ifdef USE_ITHREADS
961 MUTEX_INIT (&coro_mutex); 2793# if CORO_PTHREAD
2794 coro_thx = PERL_GET_CONTEXT;
962#endif 2795# endif
2796#endif
2797 BOOT_PAGESIZE;
963 2798
964 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2799 cctx_current = cctx_new_empty ();
965 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2800
2801 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2802 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2803
2804 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2805 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2806 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2807
2808 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2809 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2810 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2811
966 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2812 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967 2813
968 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2814 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
969 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2815 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
970 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2816 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
971 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2817 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
972 2818
973 main_mainstack = PL_mainstack; 2819 main_mainstack = PL_mainstack;
2820 main_top_env = PL_top_env;
974 2821
2822 while (main_top_env->je_prev)
2823 main_top_env = main_top_env->je_prev;
2824
2825 {
2826 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2827
2828 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2829 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2830
2831 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2832 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2833 }
2834
975 coroapi.ver = CORO_API_VERSION; 2835 coroapi.ver = CORO_API_VERSION;
2836 coroapi.rev = CORO_API_REVISION;
2837
976 coroapi.transfer = api_transfer; 2838 coroapi.transfer = api_transfer;
977}
978 2839
979Coro::State 2840 coroapi.sv_state = SvSTATE_;
980_newprocess(args) 2841 coroapi.execute_slf = api_execute_slf;
981 SV * args 2842 coroapi.prepare_nop = prepare_nop;
982 PROTOTYPE: $ 2843 coroapi.prepare_schedule = prepare_schedule;
2844 coroapi.prepare_cede = prepare_cede;
2845 coroapi.prepare_cede_notself = prepare_cede_notself;
2846
2847 {
2848 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2849
2850 if (!svp) croak ("Time::HiRes is required");
2851 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2852
2853 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2854 }
2855
2856 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2857}
2858
2859SV *
2860new (char *klass, ...)
2861 ALIAS:
2862 Coro::new = 1
983 CODE: 2863 CODE:
984 Coro__State coro; 2864{
2865 struct coro *coro;
2866 MAGIC *mg;
2867 HV *hv;
2868 CV *cb;
2869 int i;
985 2870
986 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2871 if (items > 1)
987 croak ("Coro::State::_newprocess expects an arrayref");
988 2872 {
2873 cb = coro_sv_2cv (aTHX_ ST (1));
2874
2875 if (!ix)
2876 {
2877 if (CvISXSUB (cb))
2878 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2879
2880 if (!CvROOT (cb))
2881 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2882 }
2883 }
2884
989 Newz (0, coro, 1, struct coro); 2885 Newz (0, coro, 1, struct coro);
2886 coro->args = newAV ();
2887 coro->flags = CF_NEW;
990 2888
991 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2889 if (coro_first) coro_first->prev = coro;
992 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 2890 coro->next = coro_first;
993 /*coro->stack = 0;*/ 2891 coro_first = coro;
994 2892
995 /* same as JMPENV_BOOTSTRAP */ 2893 coro->hv = hv = newHV ();
996 /* we might be able to recycle start_env, but safe is safe */ 2894 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
997 /*Zero(&coro->start_env, 1, JMPENV);*/ 2895 mg->mg_flags |= MGf_DUP;
998 coro->start_env.je_ret = -1; 2896 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
999 coro->start_env.je_mustcatch = TRUE;
1000 2897
1001 RETVAL = coro; 2898 if (items > 1)
2899 {
2900 av_extend (coro->args, items - 1 + ix - 1);
2901
2902 if (ix)
2903 {
2904 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2905 cb = cv_coro_run;
2906 }
2907
2908 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2909
2910 for (i = 2; i < items; i++)
2911 av_push (coro->args, newSVsv (ST (i)));
2912 }
2913}
1002 OUTPUT: 2914 OUTPUT:
1003 RETVAL 2915 RETVAL
1004 2916
1005void 2917void
1006transfer(prev, next, flags) 2918transfer (...)
1007 SV *prev
1008 SV *next
1009 int flags
1010 PROTOTYPE: @ 2919 PROTOTYPE: $$
1011 CODE: 2920 CODE:
1012 PUTBACK; 2921 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1013 SV_CORO (next, "Coro::transfer"); 2922
1014 SV_CORO (prev, "Coro::transfer"); 2923bool
1015 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2924_destroy (SV *coro_sv)
1016 SPAGAIN; 2925 CODE:
2926 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2927 OUTPUT:
2928 RETVAL
1017 2929
1018void 2930void
1019DESTROY(coro)
1020 Coro::State coro
1021 CODE:
1022
1023 if (coro->mainstack && coro->mainstack != main_mainstack)
1024 {
1025 struct coro temp;
1026
1027 PUTBACK;
1028 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1029 LOAD (aTHX_ coro);
1030 SPAGAIN;
1031
1032 destroy_stacks (aTHX);
1033
1034 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1035 SPAGAIN;
1036
1037 coro->mainstack = 0;
1038 }
1039
1040 deallocate_stack (coro);
1041 SvREFCNT_dec (coro->args);
1042 Safefree (coro);
1043
1044void
1045_exit(code) 2931_exit (int code)
1046 int code
1047 PROTOTYPE: $ 2932 PROTOTYPE: $
1048 CODE: 2933 CODE:
1049 _exit (code); 2934 _exit (code);
1050 2935
1051MODULE = Coro::State PACKAGE = Coro::Cont 2936SV *
2937clone (Coro::State coro)
2938 CODE:
2939{
2940#if CORO_CLONE
2941 struct coro *ncoro = coro_clone (aTHX_ coro);
2942 MAGIC *mg;
2943 /* TODO: too much duplication */
2944 ncoro->hv = newHV ();
2945 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2946 mg->mg_flags |= MGf_DUP;
2947 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2948#else
2949 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2950#endif
2951}
2952 OUTPUT:
2953 RETVAL
1052 2954
1053# this is slightly dirty (should expose a c-level api) 2955int
2956cctx_stacksize (int new_stacksize = 0)
2957 PROTOTYPE: ;$
2958 CODE:
2959 RETVAL = cctx_stacksize;
2960 if (new_stacksize)
2961 {
2962 cctx_stacksize = new_stacksize;
2963 ++cctx_gen;
2964 }
2965 OUTPUT:
2966 RETVAL
2967
2968int
2969cctx_max_idle (int max_idle = 0)
2970 PROTOTYPE: ;$
2971 CODE:
2972 RETVAL = cctx_max_idle;
2973 if (max_idle > 1)
2974 cctx_max_idle = max_idle;
2975 OUTPUT:
2976 RETVAL
2977
2978int
2979cctx_count ()
2980 PROTOTYPE:
2981 CODE:
2982 RETVAL = cctx_count;
2983 OUTPUT:
2984 RETVAL
2985
2986int
2987cctx_idle ()
2988 PROTOTYPE:
2989 CODE:
2990 RETVAL = cctx_idle;
2991 OUTPUT:
2992 RETVAL
1054 2993
1055void 2994void
1056yield(...) 2995list ()
1057 PROTOTYPE: @ 2996 PROTOTYPE:
2997 PPCODE:
2998{
2999 struct coro *coro;
3000 for (coro = coro_first; coro; coro = coro->next)
3001 if (coro->hv)
3002 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3003}
3004
3005void
3006call (Coro::State coro, SV *coderef)
3007 ALIAS:
3008 eval = 1
3009 CODE:
3010{
3011 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3012 {
3013 struct coro temp;
3014
3015 if (!(coro->flags & CF_RUNNING))
3016 {
3017 PUTBACK;
3018 save_perl (aTHX_ &temp);
3019 load_perl (aTHX_ coro);
3020 }
3021
3022 {
3023 dSP;
3024 ENTER;
3025 SAVETMPS;
3026 PUTBACK;
3027 PUSHSTACK;
3028 PUSHMARK (SP);
3029
3030 if (ix)
3031 eval_sv (coderef, 0);
3032 else
3033 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3034
3035 POPSTACK;
3036 SPAGAIN;
3037 FREETMPS;
3038 LEAVE;
3039 PUTBACK;
3040 }
3041
3042 if (!(coro->flags & CF_RUNNING))
3043 {
3044 save_perl (aTHX_ coro);
3045 load_perl (aTHX_ &temp);
3046 SPAGAIN;
3047 }
3048 }
3049}
3050
3051SV *
3052is_ready (Coro::State coro)
3053 PROTOTYPE: $
3054 ALIAS:
3055 is_ready = CF_READY
3056 is_running = CF_RUNNING
3057 is_new = CF_NEW
3058 is_destroyed = CF_DESTROYED
3059 CODE:
3060 RETVAL = boolSV (coro->flags & ix);
3061 OUTPUT:
3062 RETVAL
3063
3064void
3065throw (Coro::State self, SV *throw = &PL_sv_undef)
3066 PROTOTYPE: $;$
1058 CODE: 3067 CODE:
1059 SV *yieldstack; 3068{
1060 SV *sv; 3069 struct coro *current = SvSTATE_current;
1061 AV *defav = GvAV (PL_defgv); 3070 SV **throwp = self == current ? &CORO_THROW : &self->except;
1062 struct coro *prev, *next; 3071 SvREFCNT_dec (*throwp);
3072 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3073}
1063 3074
1064 yieldstack = *hv_fetch ( 3075void
1065 (HV *)SvRV (GvSV (coro_current)), 3076api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1066 "yieldstack", sizeof ("yieldstack") - 1, 3077 PROTOTYPE: $;$
3078 C_ARGS: aTHX_ coro, flags
3079
3080SV *
3081has_cctx (Coro::State coro)
3082 PROTOTYPE: $
3083 CODE:
3084 /* maybe manage the running flag differently */
3085 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3086 OUTPUT:
3087 RETVAL
3088
3089int
3090is_traced (Coro::State coro)
3091 PROTOTYPE: $
3092 CODE:
3093 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3094 OUTPUT:
3095 RETVAL
3096
3097UV
3098rss (Coro::State coro)
3099 PROTOTYPE: $
3100 ALIAS:
3101 usecount = 1
3102 CODE:
3103 switch (ix)
3104 {
3105 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3106 case 1: RETVAL = coro->usecount; break;
1067 0 3107 }
3108 OUTPUT:
3109 RETVAL
3110
3111void
3112force_cctx ()
3113 PROTOTYPE:
3114 CODE:
3115 cctx_current->idle_sp = 0;
3116
3117void
3118swap_defsv (Coro::State self)
3119 PROTOTYPE: $
3120 ALIAS:
3121 swap_defav = 1
3122 CODE:
3123 if (!self->slot)
3124 croak ("cannot swap state with coroutine that has no saved state,");
3125 else
1068 ); 3126 {
3127 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3128 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1069 3129
1070 /* set up @_ -- ugly */ 3130 SV *tmp = *src; *src = *dst; *dst = tmp;
1071 av_clear (defav); 3131 }
1072 av_fill (defav, items - 1);
1073 while (items--)
1074 av_store (defav, items, SvREFCNT_inc (ST(items)));
1075 3132
1076 sv = av_pop ((AV *)SvRV (yieldstack));
1077 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1078 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1079 SvREFCNT_dec (sv);
1080
1081 transfer (aTHX_ prev, next, 0);
1082 3133
1083MODULE = Coro::State PACKAGE = Coro 3134MODULE = Coro::State PACKAGE = Coro
1084 3135
1085# this is slightly dirty (should expose a c-level api)
1086
1087BOOT: 3136BOOT:
1088{ 3137{
1089 int i; 3138 int i;
3139
3140 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3141 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3142 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3143 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3144 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3145 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3146 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3147 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3148 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3149
3150 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3151 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3152 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3153 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3154
1090 HV *stash = gv_stashpv ("Coro", TRUE); 3155 coro_stash = gv_stashpv ("Coro", TRUE);
1091 3156
1092 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3157 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1093 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3158 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1094 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3159 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1095 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3160 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1096 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3161 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1097 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3162 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1098
1099 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1100 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1101 3163
1102 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3164 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1103 coro_ready[i] = newAV (); 3165 coro_ready[i] = newAV ();
1104 3166
1105 { 3167 {
1106 SV *sv = perl_get_sv("Coro::API", 1); 3168 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1107 3169
1108 coroapi.schedule = api_schedule; 3170 coroapi.schedule = api_schedule;
3171 coroapi.schedule_to = api_schedule_to;
1109 coroapi.cede = api_cede; 3172 coroapi.cede = api_cede;
3173 coroapi.cede_notself = api_cede_notself;
1110 coroapi.ready = api_ready; 3174 coroapi.ready = api_ready;
3175 coroapi.is_ready = api_is_ready;
1111 coroapi.nready = &coro_nready; 3176 coroapi.nready = coro_nready;
1112 coroapi.current = coro_current; 3177 coroapi.current = coro_current;
1113 3178
1114 GCoroAPI = &coroapi; 3179 /*GCoroAPI = &coroapi;*/
1115 sv_setiv(sv, (IV)&coroapi); 3180 sv_setiv (sv, (IV)&coroapi);
1116 SvREADONLY_on(sv); 3181 SvREADONLY_on (sv);
1117 } 3182 }
1118} 3183}
1119 3184
1120#if !PERL_MICRO
1121
1122void 3185void
1123ready(self) 3186terminate (...)
1124 SV * self 3187 CODE:
3188 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3189
3190void
3191schedule (...)
3192 CODE:
3193 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3194
3195void
3196schedule_to (...)
3197 CODE:
3198 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3199
3200void
3201cede_to (...)
3202 CODE:
3203 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3204
3205void
3206cede (...)
3207 CODE:
3208 CORO_EXECUTE_SLF_XS (slf_init_cede);
3209
3210void
3211cede_notself (...)
3212 CODE:
3213 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3214
3215void
3216_cancel (Coro::State self)
3217 CODE:
3218 coro_state_destroy (aTHX_ self);
3219 coro_call_on_destroy (aTHX_ self);
3220
3221void
3222_set_current (SV *current)
1125 PROTOTYPE: $ 3223 PROTOTYPE: $
1126 CODE: 3224 CODE:
1127 api_ready (self); 3225 SvREFCNT_dec (SvRV (coro_current));
3226 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1128 3227
1129#endif 3228void
3229_set_readyhook (SV *hook)
3230 PROTOTYPE: $
3231 CODE:
3232 SvREFCNT_dec (coro_readyhook);
3233 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1130 3234
1131int 3235int
3236prio (Coro::State coro, int newprio = 0)
3237 PROTOTYPE: $;$
3238 ALIAS:
3239 nice = 1
3240 CODE:
3241{
3242 RETVAL = coro->prio;
3243
3244 if (items > 1)
3245 {
3246 if (ix)
3247 newprio = coro->prio - newprio;
3248
3249 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3250 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3251
3252 coro->prio = newprio;
3253 }
3254}
3255 OUTPUT:
3256 RETVAL
3257
3258SV *
3259ready (SV *self)
3260 PROTOTYPE: $
3261 CODE:
3262 RETVAL = boolSV (api_ready (aTHX_ self));
3263 OUTPUT:
3264 RETVAL
3265
3266int
1132nready(...) 3267nready (...)
1133 PROTOTYPE: 3268 PROTOTYPE:
1134 CODE: 3269 CODE:
1135 RETVAL = coro_nready; 3270 RETVAL = coro_nready;
1136 OUTPUT: 3271 OUTPUT:
1137 RETVAL 3272 RETVAL
1138 3273
1139void 3274void
1140schedule(...) 3275_pool_handler (...)
1141 PROTOTYPE:
1142 CODE: 3276 CODE:
1143 api_schedule (); 3277 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1144 3278
1145void 3279void
1146cede(...) 3280async_pool (SV *cv, ...)
1147 PROTOTYPE: 3281 PROTOTYPE: &@
3282 PPCODE:
3283{
3284 HV *hv = (HV *)av_pop (av_async_pool);
3285 AV *av = newAV ();
3286 SV *cb = ST (0);
3287 int i;
3288
3289 av_extend (av, items - 2);
3290 for (i = 1; i < items; ++i)
3291 av_push (av, SvREFCNT_inc_NN (ST (i)));
3292
3293 if ((SV *)hv == &PL_sv_undef)
3294 {
3295 PUSHMARK (SP);
3296 EXTEND (SP, 2);
3297 PUSHs (sv_Coro);
3298 PUSHs ((SV *)cv_pool_handler);
3299 PUTBACK;
3300 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3301 SPAGAIN;
3302
3303 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3304 }
3305
3306 {
3307 struct coro *coro = SvSTATE_hv (hv);
3308
3309 assert (!coro->invoke_cb);
3310 assert (!coro->invoke_av);
3311 coro->invoke_cb = SvREFCNT_inc (cb);
3312 coro->invoke_av = av;
3313 }
3314
3315 api_ready (aTHX_ (SV *)hv);
3316
3317 if (GIMME_V != G_VOID)
3318 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3319 else
3320 SvREFCNT_dec (hv);
3321}
3322
3323SV *
3324rouse_cb ()
3325 PROTOTYPE:
1148 CODE: 3326 CODE:
3327 RETVAL = coro_new_rouse_cb (aTHX);
3328 OUTPUT:
3329 RETVAL
3330
3331void
3332rouse_wait (...)
3333 PROTOTYPE: ;$
3334 PPCODE:
3335 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3336
3337
3338MODULE = Coro::State PACKAGE = PerlIO::cede
3339
3340BOOT:
3341 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3342
3343
3344MODULE = Coro::State PACKAGE = Coro::Semaphore
3345
3346SV *
3347new (SV *klass, SV *count = 0)
3348 CODE:
3349 RETVAL = sv_bless (
3350 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3351 GvSTASH (CvGV (cv))
3352 );
3353 OUTPUT:
3354 RETVAL
3355
3356# helper for Coro::Channel
3357SV *
3358_alloc (int count)
3359 CODE:
3360 RETVAL = coro_waitarray_new (aTHX_ count);
3361 OUTPUT:
3362 RETVAL
3363
3364SV *
3365count (SV *self)
3366 CODE:
3367 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3368 OUTPUT:
3369 RETVAL
3370
3371void
3372up (SV *self, int adjust = 1)
3373 ALIAS:
3374 adjust = 1
3375 CODE:
3376 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3377
3378void
3379down (...)
3380 CODE:
3381 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3382
3383void
3384wait (...)
3385 CODE:
3386 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3387
3388void
3389try (SV *self)
3390 PPCODE:
3391{
3392 AV *av = (AV *)SvRV (self);
3393 SV *count_sv = AvARRAY (av)[0];
3394 IV count = SvIVX (count_sv);
3395
3396 if (count > 0)
3397 {
3398 --count;
3399 SvIVX (count_sv) = count;
3400 XSRETURN_YES;
3401 }
3402 else
3403 XSRETURN_NO;
3404}
3405
3406void
3407waiters (SV *self)
3408 PPCODE:
3409{
3410 AV *av = (AV *)SvRV (self);
3411 int wcount = AvFILLp (av) + 1 - 1;
3412
3413 if (GIMME_V == G_SCALAR)
3414 XPUSHs (sv_2mortal (newSViv (wcount)));
3415 else
3416 {
3417 int i;
3418 EXTEND (SP, wcount);
3419 for (i = 1; i <= wcount; ++i)
3420 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3421 }
3422}
3423
3424MODULE = Coro::State PACKAGE = Coro::Signal
3425
3426SV *
3427new (SV *klass)
3428 CODE:
3429 RETVAL = sv_bless (
3430 coro_waitarray_new (aTHX_ 0),
3431 GvSTASH (CvGV (cv))
3432 );
3433 OUTPUT:
3434 RETVAL
3435
3436void
3437wait (...)
3438 CODE:
3439 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3440
3441void
3442broadcast (SV *self)
3443 CODE:
3444{
3445 AV *av = (AV *)SvRV (self);
3446 coro_signal_wake (aTHX_ av, AvFILLp (av));
3447}
3448
3449void
3450send (SV *self)
3451 CODE:
3452{
3453 AV *av = (AV *)SvRV (self);
3454
3455 if (AvFILLp (av))
3456 coro_signal_wake (aTHX_ av, 1);
3457 else
3458 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3459}
3460
3461IV
3462awaited (SV *self)
3463 CODE:
3464 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3465 OUTPUT:
3466 RETVAL
3467
3468
3469MODULE = Coro::State PACKAGE = Coro::AnyEvent
3470
3471BOOT:
3472 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3473
3474void
3475_schedule (...)
3476 CODE:
3477{
3478 static int incede;
3479
1149 api_cede (); 3480 api_cede_notself (aTHX);
1150 3481
3482 ++incede;
3483 while (coro_nready >= incede && api_cede (aTHX))
3484 ;
3485
3486 sv_setsv (sv_activity, &PL_sv_undef);
3487 if (coro_nready >= incede)
3488 {
3489 PUSHMARK (SP);
3490 PUTBACK;
3491 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3492 }
3493
3494 --incede;
3495}
3496
3497
3498MODULE = Coro::State PACKAGE = Coro::AIO
3499
3500void
3501_register (char *target, char *proto, SV *req)
3502 CODE:
3503{
3504 CV *req_cv = coro_sv_2cv (aTHX_ req);
3505 /* newXSproto doesn't return the CV on 5.8 */
3506 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3507 sv_setpv ((SV *)slf_cv, proto);
3508 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3509}
3510

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