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Comparing Coro/Coro/State.xs (file contents):
Revision 1.51 by pcg, Sun Nov 30 17:03:48 2003 UTC vs.
Revision 1.330 by root, Wed Nov 26 09:29:06 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "patchlevel.h" 11#include "patchlevel.h"
6 12
7#if PATCHLEVEL < 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)
8# ifndef PL_ppaddr 63# ifndef PL_ppaddr
9# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
10# endif 65# endif
11# ifndef call_sv 66# ifndef call_sv
12# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
23# ifndef IS_PADCONST 78# ifndef IS_PADCONST
24# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
25# endif 80# endif
26#endif 81#endif
27 82
28#include "libcoro/coro.c" 83/* 5.11 */
29 84#ifndef CxHASARGS
30#include <signal.h> 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
31
32#ifdef HAVE_MMAP
33# include <unistd.h>
34# include <sys/mman.h>
35# ifndef MAP_ANONYMOUS
36# ifdef MAP_ANON
37# define MAP_ANONYMOUS MAP_ANON
38# else
39# undef HAVE_MMAP
40# 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_main_cv == Nullcv)
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;
41# endif 161# endif
42#endif 162#endif
43 163
44#define SUB_INIT "Coro::State::initialize" 164static double (*nvtime)(); /* so why doesn't it take void? */
45#define UCORO_STATE "_coro_state"
46 165
47/* The next macro should declare a variable stacklevel that contains and approximation 166/* we hijack an hopefully unused CV flag for our purposes */
48 * to the current C stack pointer. Its property is that it changes with each call 167#define CVf_SLF 0x4000
49 * and should be unique. */ 168static OP *pp_slf (pTHX);
50#define dSTACKLEVEL void *stacklevel = &stacklevel
51 169
52#define IN_DESTRUCT (PL_main_cv == Nullcv) 170static U32 cctx_gen;
53 171static size_t cctx_stacksize = CORO_STACKSIZE;
54#define labs(l) ((l) >= 0 ? (l) : -(l))
55
56#include "CoroAPI.h"
57
58static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
175static HV *coro_state_stash, *coro_stash;
176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
59 177
60/* 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 */
61typedef struct { 213typedef struct coro_cctx
62 int refcnt; /* pointer reference counter */ 214{
63 int usecnt; /* shared by how many coroutines */ 215 struct coro_cctx *next;
64 int gencnt; /* generation counter */
65 216
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;
66 coro_context cctx; 225 coro_context cctx;
67 226
68 void *sptr; 227 U32 gen;
69 long ssize; /* positive == mmap, otherwise malloc */ 228#if CORO_USE_VALGRIND
70} coro_stack; 229 int valgrind_id;
230#endif
231 unsigned char flags;
232} coro_cctx;
71 233
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 */
72struct coro { 261struct coro {
73 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 262 /* the C coroutine allocated to this perl coroutine, if any */
74 JMPENV start_env; 263 coro_cctx *cctx;
75 264
76 /* the optional C context */ 265 /* state data */
77 coro_stack *stack; 266 struct CoroSLF slf_frame; /* saved slf frame */
78 void *cursp;
79 int gencnt;
80
81 /* optionally saved, might be zero */
82 AV *defav;
83 SV *defsv;
84 SV *errsv;
85
86 /* saved global state not related to stacks */
87 U8 dowarn;
88 I32 in_eval;
89
90 /* the stacks and related info (callchain etc..) */
91 PERL_SI *curstackinfo;
92 AV *curstack;
93 AV *mainstack; 267 AV *mainstack;
94 SV **stack_sp; 268 perl_slots *slot; /* basically the saved sp */
95 OP *op;
96 SV **curpad;
97 AV *comppad;
98 SV **stack_base;
99 SV **stack_max;
100 SV **tmps_stack;
101 I32 tmps_floor;
102 I32 tmps_ix;
103 I32 tmps_max;
104 I32 *markstack;
105 I32 *markstack_ptr;
106 I32 *markstack_max;
107 I32 *scopestack;
108 I32 scopestack_ix;
109 I32 scopestack_max;
110 ANY *savestack;
111 I32 savestack_ix;
112 I32 savestack_max;
113 OP **retstack;
114 I32 retstack_ix;
115 I32 retstack_max;
116 COP *curcop;
117 JMPENV *top_env;
118 269
270 CV *startcv; /* the CV to execute */
119 /* data associated with this coroutine (initial args) */ 271 AV *args; /* data associated with this coroutine (initial args) */
120 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;
121}; 292};
122 293
123typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
124typedef struct coro *Coro__State_or_hashref; 295typedef struct coro *Coro__State_or_hashref;
125 296
126static AV *main_mainstack; /* used to differentiate between $main and others */ 297/* the following variables are effectively part of the perl context */
127static HV *coro_state_stash; 298/* and get copied between struct coro and these variables */
128static SV *ucoro_state_sv; 299/* the mainr easonw e don't support windows process emulation */
129static U32 ucoro_state_hash; 300static struct CoroSLF slf_frame; /* the current slf frame */
130static HV *padlist_cache;
131static SV *coro_mortal; /* will be freed after next transfer */
132
133/* mostly copied from op.c:cv_clone2 */
134STATIC AV *
135clone_padlist (AV *protopadlist)
136{
137 AV *av;
138 I32 ix;
139 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
140 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
141 SV **pname = AvARRAY (protopad_name);
142 SV **ppad = AvARRAY (protopad);
143 I32 fname = AvFILLp (protopad_name);
144 I32 fpad = AvFILLp (protopad);
145 AV *newpadlist, *newpad_name, *newpad;
146 SV **npad;
147
148 newpad_name = newAV ();
149 for (ix = fname; ix >= 0; ix--)
150 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152 newpad = newAV ();
153 av_fill (newpad, AvFILLp (protopad));
154 npad = AvARRAY (newpad);
155
156 newpadlist = newAV ();
157 AvREAL_off (newpadlist);
158 av_store (newpadlist, 0, (SV *) newpad_name);
159 av_store (newpadlist, 1, (SV *) newpad);
160
161 av = newAV (); /* will be @_ */
162 av_extend (av, 0);
163 av_store (newpad, 0, (SV *) av);
164 AvFLAGS (av) = AVf_REIFY;
165
166 for (ix = fpad; ix > 0; ix--)
167 {
168 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169 if (namesv && namesv != &PL_sv_undef)
170 {
171 char *name = SvPVX (namesv); /* XXX */
172 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173 { /* lexical from outside? */
174 npad[ix] = SvREFCNT_inc (ppad[ix]);
175 }
176 else
177 { /* our own lexical */
178 SV *sv;
179 if (*name == '&')
180 sv = SvREFCNT_inc (ppad[ix]);
181 else if (*name == '@')
182 sv = (SV *) newAV ();
183 else if (*name == '%')
184 sv = (SV *) newHV ();
185 else
186 sv = NEWSV (0, 0);
187#ifdef SvPADBUSY
188 if (!SvPADBUSY (sv))
189#endif
190 SvPADMY_on (sv);
191 npad[ix] = sv;
192 }
193 }
194 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195 {
196 npad[ix] = SvREFCNT_inc (ppad[ix]);
197 }
198 else
199 {
200 SV *sv = NEWSV (0, 0);
201 SvPADTMP_on (sv);
202 npad[ix] = sv;
203 }
204 }
205
206#if 0 /* return -ENOTUNDERSTOOD */
207 /* Now that vars are all in place, clone nested closures. */
208
209 for (ix = fpad; ix > 0; ix--) {
210 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211 if (namesv
212 && namesv != &PL_sv_undef
213 && !(SvFLAGS(namesv) & SVf_FAKE)
214 && *SvPVX(namesv) == '&'
215 && CvCLONE(ppad[ix]))
216 {
217 CV *kid = cv_clone((CV*)ppad[ix]);
218 SvREFCNT_dec(ppad[ix]);
219 CvCLONE_on(kid);
220 SvPADMY_on(kid);
221 npad[ix] = (SV*)kid;
222 }
223 }
224#endif
225
226 return newpadlist;
227}
228
229STATIC void
230free_padlist (AV *padlist)
231{
232 /* may be during global destruction */
233 if (SvREFCNT (padlist))
234 {
235 I32 i = AvFILLp (padlist);
236 while (i >= 0)
237 {
238 SV **svp = av_fetch (padlist, i--, FALSE);
239 if (svp)
240 {
241 SV *sv;
242 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
243 SvREFCNT_dec (sv);
244
245 SvREFCNT_dec (*svp);
246 }
247 }
248
249 SvREFCNT_dec ((SV*)padlist);
250 }
251}
252
253STATIC int
254coro_cv_free (SV *sv, MAGIC *mg)
255{
256 AV *padlist;
257 AV *av = (AV *)mg->mg_obj;
258
259 /* casting is fun. */
260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261 free_padlist (padlist);
262}
263
264#define PERL_MAGIC_coro PERL_MAGIC_ext
265
266static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
267
268/* the next two functions merely cache the padlists */
269STATIC void
270get_padlist (CV *cv)
271{
272 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
273
274 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
275 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
276 else
277 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
278}
279
280STATIC void
281put_padlist (CV *cv)
282{
283 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
284
285 if (!mg)
286 {
287 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
288 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289 mg->mg_virtual = &vtbl_coro;
290 mg->mg_obj = (SV *)newAV ();
291 }
292
293 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
294}
295
296#define SB do {
297#define SE } while (0)
298
299#define LOAD(state) load_state(aTHX_ (state));
300#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
301
302#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
303
304static void
305load_state(pTHX_ Coro__State c)
306{
307 PL_dowarn = c->dowarn;
308 PL_in_eval = c->in_eval;
309
310 PL_curstackinfo = c->curstackinfo;
311 PL_curstack = c->curstack;
312 PL_mainstack = c->mainstack;
313 PL_stack_sp = c->stack_sp;
314 PL_op = c->op;
315 PL_curpad = c->curpad;
316 PL_comppad = c->comppad;
317 PL_stack_base = c->stack_base;
318 PL_stack_max = c->stack_max;
319 PL_tmps_stack = c->tmps_stack;
320 PL_tmps_floor = c->tmps_floor;
321 PL_tmps_ix = c->tmps_ix;
322 PL_tmps_max = c->tmps_max;
323 PL_markstack = c->markstack;
324 PL_markstack_ptr = c->markstack_ptr;
325 PL_markstack_max = c->markstack_max;
326 PL_scopestack = c->scopestack;
327 PL_scopestack_ix = c->scopestack_ix;
328 PL_scopestack_max = c->scopestack_max;
329 PL_savestack = c->savestack;
330 PL_savestack_ix = c->savestack_ix;
331 PL_savestack_max = c->savestack_max;
332 PL_retstack = c->retstack;
333 PL_retstack_ix = c->retstack_ix;
334 PL_retstack_max = c->retstack_max;
335 PL_curcop = c->curcop;
336 PL_top_env = c->top_env;
337
338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341
342 {
343 dSP;
344 CV *cv;
345
346 /* now do the ugly restore mess */
347 while ((cv = (CV *)POPs))
348 {
349 AV *padlist = (AV *)POPs;
350
351 if (padlist)
352 {
353 put_padlist (cv); /* mark this padlist as available */
354 CvPADLIST(cv) = padlist;
355#ifdef USE_THREADS
356 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357#endif
358 }
359
360 ++CvDEPTH(cv);
361 }
362
363 PUTBACK;
364 }
365}
366
367static void
368save_state(pTHX_ Coro__State c, int flags)
369{
370 {
371 dSP;
372 I32 cxix = cxstack_ix;
373 PERL_CONTEXT *ccstk = cxstack;
374 PERL_SI *top_si = PL_curstackinfo;
375
376 /*
377 * the worst thing you can imagine happens first - we have to save
378 * (and reinitialize) all cv's in the whole callchain :(
379 */
380
381 PUSHs (Nullsv);
382 /* this loop was inspired by pp_caller */
383 for (;;)
384 {
385 while (cxix >= 0)
386 {
387 PERL_CONTEXT *cx = &ccstk[cxix--];
388
389 if (CxTYPE(cx) == CXt_SUB)
390 {
391 CV *cv = cx->blk_sub.cv;
392 if (CvDEPTH(cv))
393 {
394#ifdef USE_THREADS
395 /*XPUSHs ((SV *)CvOWNER(cv));*/
396 /*CvOWNER(cv) = 0;*/
397 /*error must unlock this cv etc.. etc...*/
398#endif
399 EXTEND (SP, CvDEPTH(cv)*2);
400
401 while (--CvDEPTH(cv))
402 {
403 /* this tells the restore code to increment CvDEPTH */
404 PUSHs (Nullsv);
405 PUSHs ((SV *)cv);
406 }
407
408 PUSHs ((SV *)CvPADLIST(cv));
409 PUSHs ((SV *)cv);
410
411 get_padlist (cv); /* this is a monster */
412 }
413 }
414#ifdef CXt_FORMAT
415 else if (CxTYPE(cx) == CXt_FORMAT)
416 {
417 /* I never used formats, so how should I know how these are implemented? */
418 /* my bold guess is as a simple, plain sub... */
419 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
420 }
421#endif
422 }
423
424 if (top_si->si_type == PERLSI_MAIN)
425 break;
426
427 top_si = top_si->si_prev;
428 ccstk = top_si->si_cxstack;
429 cxix = top_si->si_cxix;
430 }
431
432 PUTBACK;
433 }
434
435 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
436 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
437 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
438
439 c->dowarn = PL_dowarn;
440 c->in_eval = PL_in_eval;
441
442 c->curstackinfo = PL_curstackinfo;
443 c->curstack = PL_curstack;
444 c->mainstack = PL_mainstack;
445 c->stack_sp = PL_stack_sp;
446 c->op = PL_op;
447 c->curpad = PL_curpad;
448 c->comppad = PL_comppad;
449 c->stack_base = PL_stack_base;
450 c->stack_max = PL_stack_max;
451 c->tmps_stack = PL_tmps_stack;
452 c->tmps_floor = PL_tmps_floor;
453 c->tmps_ix = PL_tmps_ix;
454 c->tmps_max = PL_tmps_max;
455 c->markstack = PL_markstack;
456 c->markstack_ptr = PL_markstack_ptr;
457 c->markstack_max = PL_markstack_max;
458 c->scopestack = PL_scopestack;
459 c->scopestack_ix = PL_scopestack_ix;
460 c->scopestack_max = PL_scopestack_max;
461 c->savestack = PL_savestack;
462 c->savestack_ix = PL_savestack_ix;
463 c->savestack_max = PL_savestack_max;
464 c->retstack = PL_retstack;
465 c->retstack_ix = PL_retstack_ix;
466 c->retstack_max = PL_retstack_max;
467 c->curcop = PL_curcop;
468 c->top_env = PL_top_env;
469}
470
471/*
472 * allocate various perl stacks. This is an exact copy
473 * of perl.c:init_stacks, except that it uses less memory
474 * on the assumption that coroutines do not usually need
475 * a lot of stackspace.
476 */
477STATIC void
478coro_init_stacks (pTHX)
479{
480 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
481 PL_curstackinfo->si_type = PERLSI_MAIN;
482 PL_curstack = PL_curstackinfo->si_stack;
483 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
484
485 PL_stack_base = AvARRAY(PL_curstack);
486 PL_stack_sp = PL_stack_base;
487 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
488
489 New(50,PL_tmps_stack,96,SV*);
490 PL_tmps_floor = -1;
491 PL_tmps_ix = -1;
492 PL_tmps_max = 96;
493
494 New(54,PL_markstack,16,I32);
495 PL_markstack_ptr = PL_markstack;
496 PL_markstack_max = PL_markstack + 16;
497
498#ifdef SET_MARK_OFFSET
499 SET_MARK_OFFSET;
500#endif
501
502 New(54,PL_scopestack,16,I32);
503 PL_scopestack_ix = 0;
504 PL_scopestack_max = 16;
505
506 New(54,PL_savestack,96,ANY);
507 PL_savestack_ix = 0;
508 PL_savestack_max = 96;
509
510 New(54,PL_retstack,8,OP*);
511 PL_retstack_ix = 0;
512 PL_retstack_max = 8;
513}
514
515/*
516 * destroy the stacks, the callchain etc...
517 */
518STATIC void
519destroy_stacks(pTHX)
520{
521 if (!IN_DESTRUCT)
522 {
523 /* is this ugly, I ask? */
524 while (PL_scopestack_ix)
525 LEAVE;
526
527 /* sure it is, but more important: is it correct?? :/ */
528 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
529 FREETMPS;
530 }
531
532 while (PL_curstackinfo->si_next)
533 PL_curstackinfo = PL_curstackinfo->si_next;
534
535 while (PL_curstackinfo)
536 {
537 PERL_SI *p = PL_curstackinfo->si_prev;
538
539 {
540 dSP;
541 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
542 PUTBACK; /* possibly superfluous */
543 }
544
545 if (!IN_DESTRUCT)
546 {
547 dounwind(-1);
548 SvREFCNT_dec(PL_curstackinfo->si_stack);
549 }
550
551 Safefree(PL_curstackinfo->si_cxstack);
552 Safefree(PL_curstackinfo);
553 PL_curstackinfo = p;
554 }
555
556 Safefree(PL_tmps_stack);
557 Safefree(PL_markstack);
558 Safefree(PL_scopestack);
559 Safefree(PL_savestack);
560 Safefree(PL_retstack);
561}
562
563static void
564allocate_stack (Coro__State ctx, int alloc)
565{
566 coro_stack *stack;
567
568 New (0, stack, 1, coro_stack);
569
570 stack->refcnt = 1;
571 stack->usecnt = 1;
572 stack->gencnt = ctx->gencnt = 0;
573 if (alloc)
574 {
575#if HAVE_MMAP
576 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
577 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
578 if (stack->sptr == (void *)-1)
579#endif
580 {
581 /*FIXME*//*D*//* reasonable stack size! */
582 stack->ssize = - (16384 * sizeof (long));
583 New (0, stack->sptr, 16384, long);
584 }
585 }
586 else
587 stack->sptr = 0;
588
589 ctx->stack = stack;
590}
591
592static void
593deallocate_stack (Coro__State ctx)
594{
595 coro_stack *stack = ctx->stack;
596
597 ctx->stack = 0;
598
599 if (stack)
600 {
601 if (!--stack->refcnt)
602 {
603#ifdef HAVE_MMAP
604 if (stack->ssize > 0 && stack->sptr)
605 munmap (stack->sptr, stack->ssize);
606 else
607#endif
608 Safefree (stack->sptr);
609
610 Safefree (stack);
611 }
612 else if (ctx->gencnt == stack->gencnt)
613 --stack->usecnt;
614 }
615}
616
617static void
618setup_coro (void *arg)
619{
620 /*
621 * emulate part of the perl startup here.
622 */
623 dSP;
624 Coro__State ctx = (Coro__State)arg;
625 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
626
627 coro_init_stacks (aTHX);
628 /*PL_curcop = 0;*/
629 /*PL_in_eval = PL_in_eval;*/ /* inherit */
630 SvREFCNT_dec (GvAV (PL_defgv));
631 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
632
633 SPAGAIN;
634
635 if (ctx->stack)
636 {
637 ctx->cursp = 0;
638
639 PUSHMARK(SP);
640 PUTBACK;
641 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
642
643 if (SvTRUE (ERRSV))
644 croak (NULL);
645 else
646 croak ("FATAL: CCTXT coroutine returned!");
647 }
648 else
649 {
650 UNOP myop;
651
652 PL_op = (OP *)&myop;
653
654 Zero(&myop, 1, UNOP);
655 myop.op_next = Nullop;
656 myop.op_flags = OPf_WANT_VOID;
657
658 PUSHMARK(SP);
659 XPUSHs (sub_init);
660 /*
661 * the next line is slightly wrong, as PL_op->op_next
662 * is actually being executed so we skip the first op.
663 * that doesn't matter, though, since it is only
664 * pp_nextstate and we never return...
665 * ah yes, and I don't care anyways ;)
666 */
667 PUTBACK;
668 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
669 SPAGAIN;
670
671 ENTER; /* necessary e.g. for dounwind */
672 }
673}
674
675static void
676continue_coro (void *arg)
677{
678 /*
679 * this is a _very_ stripped down perl interpreter ;)
680 */
681 Coro__State ctx = (Coro__State)arg;
682 JMPENV coro_start_env;
683
684 PL_top_env = &ctx->start_env;
685
686 ctx->cursp = 0;
687 PL_op = PL_op->op_next;
688 CALLRUNOPS(aTHX);
689
690 abort ();
691}
692
693STATIC void
694transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
695{
696 dSTACKLEVEL;
697 static struct coro *xnext;
698
699 if (prev != next)
700 {
701 xnext = next;
702
703 if (next->mainstack)
704 {
705 SAVE (prev, flags);
706 LOAD (next);
707
708 /* mark this state as in-use */
709 next->mainstack = 0;
710 next->tmps_ix = -2;
711
712 /* stacklevel changed? if yes, grab the stack for us! */
713 if (flags & TRANSFER_SAVE_CCTXT)
714 {
715 if (!prev->stack)
716 allocate_stack (prev, 0);
717 else if (prev->cursp != stacklevel
718 && prev->stack->usecnt > 1)
719 {
720 prev->gencnt = ++prev->stack->gencnt;
721 prev->stack->usecnt = 1;
722 }
723
724 /* has our stack been invalidated? */
725 if (next->stack && next->stack->gencnt != next->gencnt)
726 {
727 deallocate_stack (next);
728 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx),
730 continue_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize));
732 }
733
734 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
735 /* don't add any code here */
736 }
737
738 }
739 else if (next->tmps_ix == -2)
740 croak ("tried to transfer to running coroutine");
741 else
742 {
743 SAVE (prev, -1); /* first get rid of the old state */
744
745 if (flags & TRANSFER_SAVE_CCTXT)
746 {
747 if (!prev->stack)
748 allocate_stack (prev, 0);
749
750 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
751 {
752 PL_top_env = &next->start_env;
753
754 setup_coro (next);
755
756 prev->stack->refcnt++;
757 prev->stack->usecnt++;
758 next->stack = prev->stack;
759 next->gencnt = prev->gencnt;
760 }
761 else
762 {
763 assert (!next->stack);
764 allocate_stack (next, 1);
765 coro_create (&(next->stack->cctx),
766 setup_coro, (void *)next,
767 next->stack->sptr, labs (next->stack->ssize));
768 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
769 /* don't add any code here */
770 }
771 }
772 else
773 setup_coro (next);
774 }
775
776 /*
777 * xnext is now either prev or next, depending on wether
778 * we switched the c stack or not. that's why I use a global
779 * variable, that should become thread-specific at one point.
780 */
781 xnext->cursp = stacklevel;
782 }
783
784 if (coro_mortal)
785 {
786 SvREFCNT_dec (coro_mortal);
787 coro_mortal = 0;
788 }
789}
790
791#define SV_CORO(sv,func) \
792 do { \
793 if (SvROK (sv)) \
794 sv = SvRV (sv); \
795 \
796 if (SvTYPE(sv) == SVt_PVHV) \
797 { \
798 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
799 \
800 if (!he) \
801 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
802 \
803 (sv) = SvRV (HeVAL(he)); \
804 } \
805 \
806 /* must also be changed inside Coro::Cont::yield */ \
807 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
808 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
809 \
810 } while(0)
811
812#define SvSTATE(sv) (struct coro *)SvIV (sv)
813
814static void
815api_transfer(pTHX_ SV *prev, SV *next, int flags)
816{
817 SV_CORO (prev, "Coro::transfer");
818 SV_CORO (next, "Coro::transfer");
819
820 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
821}
822 301
823/** Coro ********************************************************************/ 302/** Coro ********************************************************************/
824 303
825#define PRIO_MAX 3 304#define PRIO_MAX 3
826#define PRIO_HIGH 1 305#define PRIO_HIGH 1
… …
828#define PRIO_LOW -1 307#define PRIO_LOW -1
829#define PRIO_IDLE -3 308#define PRIO_IDLE -3
830#define PRIO_MIN -4 309#define PRIO_MIN -4
831 310
832/* for Coro.pm */ 311/* for Coro.pm */
833static GV *coro_current, *coro_idle; 312static SV *coro_current;
313static SV *coro_readyhook;
834static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
835static int coro_nready; 315static CV *cv_coro_run, *cv_coro_terminate;
316static struct coro *coro_first;
317#define coro_nready coroapi.nready
836 318
837static void 319/** lowlevel stuff **********************************************************/
838coro_enq (SV *sv)
839{
840 if (SvTYPE (sv) == SVt_PVHV)
841 {
842 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
843 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
844
845 prio = prio > PRIO_MAX ? PRIO_MAX
846 : prio < PRIO_MIN ? PRIO_MIN
847 : prio;
848
849 av_push (coro_ready [prio - PRIO_MIN], sv);
850 coro_nready++;
851
852 return;
853 }
854
855 croak ("Coro::ready tried to enqueue something that is not a coroutine");
856}
857 320
858static SV * 321static SV *
859coro_deq (int min_prio) 322coro_get_sv (pTHX_ const char *name, int create)
860{ 323{
861 int prio = PRIO_MAX - PRIO_MIN; 324#if PERL_VERSION_ATLEAST (5,10,0)
325 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
326 get_sv (name, create);
327#endif
328 return get_sv (name, create);
329}
862 330
863 min_prio -= PRIO_MIN; 331static AV *
864 if (min_prio < 0) 332coro_get_av (pTHX_ const char *name, int create)
865 min_prio = 0; 333{
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}
866 340
867 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 341static HV *
868 if (av_len (coro_ready[prio]) >= 0) 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
360static AV *
361coro_derive_padlist (pTHX_ CV *cv)
362{
363 AV *padlist = CvPADLIST (cv);
364 AV *newpadlist, *newpad;
365
366 newpadlist = newAV ();
367 AvREAL_off (newpadlist);
368#if PERL_VERSION_ATLEAST (5,10,0)
369 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
370#else
371 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
372#endif
373 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
374 --AvFILLp (padlist);
375
376 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
377 av_store (newpadlist, 1, (SV *)newpad);
378
379 return newpadlist;
380}
381
382static void
383free_padlist (pTHX_ AV *padlist)
384{
385 /* may be during global destruction */
386 if (SvREFCNT (padlist))
387 {
388 I32 i = AvFILLp (padlist);
389 while (i >= 0)
869 { 390 {
870 coro_nready--; 391 SV **svp = AvARRAY (padlist)[i--];
871 return av_shift (coro_ready[prio]); 392 if (svp)
393 {
394 AvREAL_on (*svp);
395 av_undef (*svp);
396 SvREFCNT_dec (*svp);
397 }
872 } 398 }
399
400 SvREFCNT_dec ((SV*)padlist);
401 }
402}
403
404static int
405coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
406{
407 AV *padlist;
408 AV *av = (AV *)mg->mg_obj;
409
410 /* casting is fun. */
411 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
412 free_padlist (aTHX_ padlist);
413
414 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
873 415
874 return 0; 416 return 0;
875} 417}
876 418
877static void 419#define CORO_MAGIC_type_cv 26
878api_ready (SV *coro) 420#define CORO_MAGIC_type_state PERL_MAGIC_ext
421
422static MGVTBL coro_cv_vtbl = {
423 0, 0, 0, 0,
424 coro_cv_free
425};
426
427#define CORO_MAGIC_NN(sv, type) \
428 (expect_true (SvMAGIC (sv)->mg_type == type) \
429 ? SvMAGIC (sv) \
430 : mg_find (sv, type))
431
432#define CORO_MAGIC(sv, type) \
433 (expect_true (SvMAGIC (sv)) \
434 ? CORO_MAGIC_NN (sv, type) \
435 : 0)
436
437#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
438#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
439
440INLINE struct coro *
441SvSTATE_ (pTHX_ SV *coro)
879{ 442{
443 HV *stash;
444 MAGIC *mg;
445
880 if (SvROK (coro)) 446 if (SvROK (coro))
881 coro = SvRV (coro); 447 coro = SvRV (coro);
882 448
883 coro_enq (SvREFCNT_inc (coro)); 449 if (expect_false (SvTYPE (coro) != SVt_PVHV))
884} 450 croak ("Coro::State object required");
885 451
452 stash = SvSTASH (coro);
453 if (expect_false (stash != coro_stash && stash != coro_state_stash))
454 {
455 /* very slow, but rare, check */
456 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
457 croak ("Coro::State object required");
458 }
459
460 mg = CORO_MAGIC_state (coro);
461 return (struct coro *)mg->mg_ptr;
462}
463
464#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
465
466/* faster than SvSTATE, but expects a coroutine hv */
467#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
468#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
469
470/* the next two functions merely cache the padlists */
471static void
472get_padlist (pTHX_ CV *cv)
473{
474 MAGIC *mg = CORO_MAGIC_cv (cv);
475 AV *av;
476
477 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
478 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
479 else
480 {
481#if CORO_PREFER_PERL_FUNCTIONS
482 /* this is probably cleaner? but also slower! */
483 /* in practise, it seems to be less stable */
484 CV *cp = Perl_cv_clone (aTHX_ cv);
485 CvPADLIST (cv) = CvPADLIST (cp);
486 CvPADLIST (cp) = 0;
487 SvREFCNT_dec (cp);
488#else
489 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
490#endif
491 }
492}
493
494static void
495put_padlist (pTHX_ CV *cv)
496{
497 MAGIC *mg = CORO_MAGIC_cv (cv);
498 AV *av;
499
500 if (expect_false (!mg))
501 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
502
503 av = (AV *)mg->mg_obj;
504
505 if (expect_false (AvFILLp (av) >= AvMAX (av)))
506 av_extend (av, AvFILLp (av) + 1);
507
508 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
509}
510
511/** load & save, init *******************************************************/
512
513static void
514load_perl (pTHX_ Coro__State c)
515{
516 perl_slots *slot = c->slot;
517 c->slot = 0;
518
519 PL_mainstack = c->mainstack;
520
521 GvSV (PL_defgv) = slot->defsv;
522 GvAV (PL_defgv) = slot->defav;
523 GvSV (PL_errgv) = slot->errsv;
524 GvSV (irsgv) = slot->irsgv;
525 GvHV (PL_hintgv) = slot->hinthv;
526
527 #define VAR(name,type) PL_ ## name = slot->name;
528 # include "state.h"
529 #undef VAR
530
531 {
532 dSP;
533
534 CV *cv;
535
536 /* now do the ugly restore mess */
537 while (expect_true (cv = (CV *)POPs))
538 {
539 put_padlist (aTHX_ cv); /* mark this padlist as available */
540 CvDEPTH (cv) = PTR2IV (POPs);
541 CvPADLIST (cv) = (AV *)POPs;
542 }
543
544 PUTBACK;
545 }
546
547 slf_frame = c->slf_frame;
548 CORO_THROW = c->except;
549}
550
551static void
552save_perl (pTHX_ Coro__State c)
553{
554 c->except = CORO_THROW;
555 c->slf_frame = slf_frame;
556
557 {
558 dSP;
559 I32 cxix = cxstack_ix;
560 PERL_CONTEXT *ccstk = cxstack;
561 PERL_SI *top_si = PL_curstackinfo;
562
563 /*
564 * the worst thing you can imagine happens first - we have to save
565 * (and reinitialize) all cv's in the whole callchain :(
566 */
567
568 XPUSHs (Nullsv);
569 /* this loop was inspired by pp_caller */
570 for (;;)
571 {
572 while (expect_true (cxix >= 0))
573 {
574 PERL_CONTEXT *cx = &ccstk[cxix--];
575
576 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
577 {
578 CV *cv = cx->blk_sub.cv;
579
580 if (expect_true (CvDEPTH (cv)))
581 {
582 EXTEND (SP, 3);
583 PUSHs ((SV *)CvPADLIST (cv));
584 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
585 PUSHs ((SV *)cv);
586
587 CvDEPTH (cv) = 0;
588 get_padlist (aTHX_ cv);
589 }
590 }
591 }
592
593 if (expect_true (top_si->si_type == PERLSI_MAIN))
594 break;
595
596 top_si = top_si->si_prev;
597 ccstk = top_si->si_cxstack;
598 cxix = top_si->si_cxix;
599 }
600
601 PUTBACK;
602 }
603
604 /* allocate some space on the context stack for our purposes */
605 /* we manually unroll here, as usually 2 slots is enough */
606 if (SLOT_COUNT >= 1) CXINC;
607 if (SLOT_COUNT >= 2) CXINC;
608 if (SLOT_COUNT >= 3) CXINC;
609 {
610 int i;
611 for (i = 3; i < SLOT_COUNT; ++i)
612 CXINC;
613 }
614 cxstack_ix -= SLOT_COUNT; /* undo allocation */
615
616 c->mainstack = PL_mainstack;
617
618 {
619 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
620
621 slot->defav = GvAV (PL_defgv);
622 slot->defsv = DEFSV;
623 slot->errsv = ERRSV;
624 slot->irsgv = GvSV (irsgv);
625 slot->hinthv = GvHV (PL_hintgv);
626
627 #define VAR(name,type) slot->name = PL_ ## name;
628 # include "state.h"
629 #undef VAR
630 }
631}
632
633/*
634 * allocate various perl stacks. This is almost an exact copy
635 * of perl.c:init_stacks, except that it uses less memory
636 * on the (sometimes correct) assumption that coroutines do
637 * not usually need a lot of stackspace.
638 */
639#if CORO_PREFER_PERL_FUNCTIONS
640# define coro_init_stacks(thx) init_stacks ()
641#else
642static void
643coro_init_stacks (pTHX)
644{
645 PL_curstackinfo = new_stackinfo(32, 8);
646 PL_curstackinfo->si_type = PERLSI_MAIN;
647 PL_curstack = PL_curstackinfo->si_stack;
648 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
649
650 PL_stack_base = AvARRAY(PL_curstack);
651 PL_stack_sp = PL_stack_base;
652 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
653
654 New(50,PL_tmps_stack,32,SV*);
655 PL_tmps_floor = -1;
656 PL_tmps_ix = -1;
657 PL_tmps_max = 32;
658
659 New(54,PL_markstack,16,I32);
660 PL_markstack_ptr = PL_markstack;
661 PL_markstack_max = PL_markstack + 16;
662
663#ifdef SET_MARK_OFFSET
664 SET_MARK_OFFSET;
665#endif
666
667 New(54,PL_scopestack,8,I32);
668 PL_scopestack_ix = 0;
669 PL_scopestack_max = 8;
670
671 New(54,PL_savestack,24,ANY);
672 PL_savestack_ix = 0;
673 PL_savestack_max = 24;
674
675#if !PERL_VERSION_ATLEAST (5,10,0)
676 New(54,PL_retstack,4,OP*);
677 PL_retstack_ix = 0;
678 PL_retstack_max = 4;
679#endif
680}
681#endif
682
683/*
684 * destroy the stacks, the callchain etc...
685 */
686static void
687coro_destruct_stacks (pTHX)
688{
689 while (PL_curstackinfo->si_next)
690 PL_curstackinfo = PL_curstackinfo->si_next;
691
692 while (PL_curstackinfo)
693 {
694 PERL_SI *p = PL_curstackinfo->si_prev;
695
696 if (!IN_DESTRUCT)
697 SvREFCNT_dec (PL_curstackinfo->si_stack);
698
699 Safefree (PL_curstackinfo->si_cxstack);
700 Safefree (PL_curstackinfo);
701 PL_curstackinfo = p;
702 }
703
704 Safefree (PL_tmps_stack);
705 Safefree (PL_markstack);
706 Safefree (PL_scopestack);
707 Safefree (PL_savestack);
708#if !PERL_VERSION_ATLEAST (5,10,0)
709 Safefree (PL_retstack);
710#endif
711}
712
713#define CORO_RSS \
714 rss += sizeof (SYM (curstackinfo)); \
715 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
716 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
717 rss += SYM (tmps_max) * sizeof (SV *); \
718 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
719 rss += SYM (scopestack_max) * sizeof (I32); \
720 rss += SYM (savestack_max) * sizeof (ANY);
721
722static size_t
723coro_rss (pTHX_ struct coro *coro)
724{
725 size_t rss = sizeof (*coro);
726
727 if (coro->mainstack)
728 {
729 if (coro->flags & CF_RUNNING)
730 {
731 #define SYM(sym) PL_ ## sym
732 CORO_RSS;
733 #undef SYM
734 }
735 else
736 {
737 #define SYM(sym) coro->slot->sym
738 CORO_RSS;
739 #undef SYM
740 }
741 }
742
743 return rss;
744}
745
746/** coroutine stack handling ************************************************/
747
748static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
749static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
750static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
751
752/* apparently < 5.8.8 */
753#ifndef MgPV_nolen_const
754#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
755 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
756 (const char*)(mg)->mg_ptr)
757#endif
758
759/*
760 * This overrides the default magic get method of %SIG elements.
761 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
762 * and instead of tryign to save and restore the hash elements, we just provide
763 * readback here.
764 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
765 * not expecting this to actually change the hook. This is a potential problem
766 * when a schedule happens then, but we ignore this.
767 */
886static void 768static int
887api_schedule (void) 769coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
888{ 770{
889 SV *prev, *next; 771 const char *s = MgPV_nolen_const (mg);
890 772
773 if (*s == '_')
774 {
775 SV **svp = 0;
776
777 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
778 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
779
780 if (svp)
781 {
782 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
783 return 0;
784 }
785 }
786
787 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
788}
789
790static int
791coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
792{
793 const char *s = MgPV_nolen_const (mg);
794
795 if (*s == '_')
796 {
797 SV **svp = 0;
798
799 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
800 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
801
802 if (svp)
803 {
804 SV *old = *svp;
805 *svp = 0;
806 SvREFCNT_dec (old);
807 return 0;
808 }
809 }
810
811 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
812}
813
814static int
815coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
816{
817 const char *s = MgPV_nolen_const (mg);
818
819 if (*s == '_')
820 {
821 SV **svp = 0;
822
823 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
824 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
825
826 if (svp)
827 {
828 SV *old = *svp;
829 *svp = newSVsv (sv);
830 SvREFCNT_dec (old);
831 return 0;
832 }
833 }
834
835 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
836}
837
838static void
839prepare_nop (pTHX_ struct coro_transfer_args *ta)
840{
841 /* kind of mega-hacky, but works */
842 ta->next = ta->prev = (struct coro *)ta;
843}
844
845static int
846slf_check_nop (pTHX_ struct CoroSLF *frame)
847{
848 return 0;
849}
850
851static int
852slf_check_repeat (pTHX_ struct CoroSLF *frame)
853{
854 return 1;
855}
856
857static UNOP coro_setup_op;
858
859static void NOINLINE /* noinline to keep it out of the transfer fast path */
860coro_setup (pTHX_ struct coro *coro)
861{
862 /*
863 * emulate part of the perl startup here.
864 */
865 coro_init_stacks (aTHX);
866
867 PL_runops = RUNOPS_DEFAULT;
868 PL_curcop = &PL_compiling;
869 PL_in_eval = EVAL_NULL;
870 PL_comppad = 0;
871 PL_comppad_name = 0;
872 PL_comppad_name_fill = 0;
873 PL_comppad_name_floor = 0;
874 PL_curpm = 0;
875 PL_curpad = 0;
876 PL_localizing = 0;
877 PL_dirty = 0;
878 PL_restartop = 0;
879#if PERL_VERSION_ATLEAST (5,10,0)
880 PL_parser = 0;
881#endif
882 PL_hints = 0;
883
884 /* recreate the die/warn hooks */
885 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
886 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
887
888 GvSV (PL_defgv) = newSV (0);
889 GvAV (PL_defgv) = coro->args; coro->args = 0;
890 GvSV (PL_errgv) = newSV (0);
891 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
892 GvHV (PL_hintgv) = 0;
893 PL_rs = newSVsv (GvSV (irsgv));
894 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
895
896 {
897 dSP;
898 UNOP myop;
899
900 Zero (&myop, 1, UNOP);
901 myop.op_next = Nullop;
902 myop.op_type = OP_ENTERSUB;
903 myop.op_flags = OPf_WANT_VOID;
904
905 PUSHMARK (SP);
906 PUSHs ((SV *)coro->startcv);
907 PUTBACK;
908 PL_op = (OP *)&myop;
909 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
910 }
911
912 /* this newly created coroutine might be run on an existing cctx which most
913 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
914 */
915 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
916 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
917
918 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
919 coro_setup_op.op_next = PL_op;
920 coro_setup_op.op_type = OP_ENTERSUB;
921 coro_setup_op.op_ppaddr = pp_slf;
922 /* no flags etc. required, as an init function won't be called */
923
924 PL_op = (OP *)&coro_setup_op;
925
926 /* copy throw, in case it was set before coro_setup */
927 CORO_THROW = coro->except;
928}
929
930static void
931coro_destruct (pTHX_ struct coro *coro)
932{
933 if (!IN_DESTRUCT)
934 {
935 /* restore all saved variables and stuff */
936 LEAVE_SCOPE (0);
937 assert (PL_tmps_floor == -1);
938
939 /* free all temporaries */
940 FREETMPS;
941 assert (PL_tmps_ix == -1);
942
943 /* unwind all extra stacks */
944 POPSTACK_TO (PL_mainstack);
945
946 /* unwind main stack */
947 dounwind (-1);
948 }
949
950 SvREFCNT_dec (GvSV (PL_defgv));
951 SvREFCNT_dec (GvAV (PL_defgv));
952 SvREFCNT_dec (GvSV (PL_errgv));
953 SvREFCNT_dec (PL_defoutgv);
954 SvREFCNT_dec (PL_rs);
955 SvREFCNT_dec (GvSV (irsgv));
956 SvREFCNT_dec (GvHV (PL_hintgv));
957
958 SvREFCNT_dec (PL_diehook);
959 SvREFCNT_dec (PL_warnhook);
960
961 SvREFCNT_dec (coro->saved_deffh);
962 SvREFCNT_dec (coro->rouse_cb);
963 SvREFCNT_dec (coro->invoke_cb);
964 SvREFCNT_dec (coro->invoke_av);
965
966 coro_destruct_stacks (aTHX);
967}
968
969INLINE void
970free_coro_mortal (pTHX)
971{
972 if (expect_true (coro_mortal))
973 {
974 SvREFCNT_dec (coro_mortal);
975 coro_mortal = 0;
976 }
977}
978
979static int
980runops_trace (pTHX)
981{
982 COP *oldcop = 0;
983 int oldcxix = -2;
984
985 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
986 {
987 PERL_ASYNC_CHECK ();
988
989 if (cctx_current->flags & CC_TRACE_ALL)
990 {
991 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
992 {
993 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
994 SV **bot, **top;
995 AV *av = newAV (); /* return values */
996 SV **cb;
997 dSP;
998
999 GV *gv = CvGV (cx->blk_sub.cv);
1000 SV *fullname = sv_2mortal (newSV (0));
1001 if (isGV (gv))
1002 gv_efullname3 (fullname, gv, 0);
1003
1004 bot = PL_stack_base + cx->blk_oldsp + 1;
1005 top = cx->blk_gimme == G_ARRAY ? SP + 1
1006 : cx->blk_gimme == G_SCALAR ? bot + 1
1007 : bot;
1008
1009 av_extend (av, top - bot);
1010 while (bot < top)
1011 av_push (av, SvREFCNT_inc_NN (*bot++));
1012
1013 PL_runops = RUNOPS_DEFAULT;
1014 ENTER;
1015 SAVETMPS;
1016 EXTEND (SP, 3);
1017 PUSHMARK (SP);
1018 PUSHs (&PL_sv_no);
1019 PUSHs (fullname);
1020 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1021 PUTBACK;
1022 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1023 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1024 SPAGAIN;
1025 FREETMPS;
1026 LEAVE;
1027 PL_runops = runops_trace;
1028 }
1029
1030 if (oldcop != PL_curcop)
1031 {
1032 oldcop = PL_curcop;
1033
1034 if (PL_curcop != &PL_compiling)
1035 {
1036 SV **cb;
1037
1038 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1039 {
1040 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1041
1042 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1043 {
1044 dSP;
1045 GV *gv = CvGV (cx->blk_sub.cv);
1046 SV *fullname = sv_2mortal (newSV (0));
1047
1048 if (isGV (gv))
1049 gv_efullname3 (fullname, gv, 0);
1050
1051 PL_runops = RUNOPS_DEFAULT;
1052 ENTER;
1053 SAVETMPS;
1054 EXTEND (SP, 3);
1055 PUSHMARK (SP);
1056 PUSHs (&PL_sv_yes);
1057 PUSHs (fullname);
1058 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1059 PUTBACK;
1060 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1061 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1062 SPAGAIN;
1063 FREETMPS;
1064 LEAVE;
1065 PL_runops = runops_trace;
1066 }
1067
1068 oldcxix = cxstack_ix;
1069 }
1070
1071 if (cctx_current->flags & CC_TRACE_LINE)
1072 {
1073 dSP;
1074
1075 PL_runops = RUNOPS_DEFAULT;
1076 ENTER;
1077 SAVETMPS;
1078 EXTEND (SP, 3);
1079 PL_runops = RUNOPS_DEFAULT;
1080 PUSHMARK (SP);
1081 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1082 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1083 PUTBACK;
1084 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1085 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1086 SPAGAIN;
1087 FREETMPS;
1088 LEAVE;
1089 PL_runops = runops_trace;
1090 }
1091 }
1092 }
1093 }
1094 }
1095
1096 TAINT_NOT;
1097 return 0;
1098}
1099
1100static struct CoroSLF cctx_ssl_frame;
1101
1102static void
1103slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1104{
1105 ta->prev = 0;
1106}
1107
1108static int
1109slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1110{
1111 *frame = cctx_ssl_frame;
1112
1113 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1114}
1115
1116/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1117static void NOINLINE
1118cctx_prepare (pTHX)
1119{
1120 PL_top_env = &PL_start_env;
1121
1122 if (cctx_current->flags & CC_TRACE)
1123 PL_runops = runops_trace;
1124
1125 /* we already must be executing an SLF op, there is no other valid way
1126 * that can lead to creation of a new cctx */
1127 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1128 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1129
1130 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1131 cctx_ssl_frame = slf_frame;
1132
1133 slf_frame.prepare = slf_prepare_set_stacklevel;
1134 slf_frame.check = slf_check_set_stacklevel;
1135}
1136
1137/* the tail of transfer: execute stuff we can only do after a transfer */
1138INLINE void
1139transfer_tail (pTHX)
1140{
1141 free_coro_mortal (aTHX);
1142}
1143
1144/*
1145 * this is a _very_ stripped down perl interpreter ;)
1146 */
1147static void
1148cctx_run (void *arg)
1149{
1150#ifdef USE_ITHREADS
1151# if CORO_PTHREAD
1152 PERL_SET_CONTEXT (coro_thx);
1153# endif
1154#endif
1155 {
1156 dTHX;
1157
1158 /* normally we would need to skip the entersub here */
1159 /* not doing so will re-execute it, which is exactly what we want */
1160 /* PL_nop = PL_nop->op_next */
1161
1162 /* inject a fake subroutine call to cctx_init */
1163 cctx_prepare (aTHX);
1164
1165 /* cctx_run is the alternative tail of transfer() */
1166 transfer_tail (aTHX);
1167
1168 /* somebody or something will hit me for both perl_run and PL_restartop */
1169 PL_restartop = PL_op;
1170 perl_run (PL_curinterp);
1171 /*
1172 * Unfortunately, there is no way to get at the return values of the
1173 * coro body here, as perl_run destroys these
1174 */
1175
1176 /*
1177 * If perl-run returns we assume exit() was being called or the coro
1178 * fell off the end, which seems to be the only valid (non-bug)
1179 * reason for perl_run to return. We try to exit by jumping to the
1180 * bootstrap-time "top" top_env, as we cannot restore the "main"
1181 * coroutine as Coro has no such concept.
1182 * This actually isn't valid with the pthread backend, but OSes requiring
1183 * that backend are too broken to do it in a standards-compliant way.
1184 */
1185 PL_top_env = main_top_env;
1186 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1187 }
1188}
1189
1190static coro_cctx *
1191cctx_new ()
1192{
1193 coro_cctx *cctx;
1194
1195 ++cctx_count;
1196 New (0, cctx, 1, coro_cctx);
1197
1198 cctx->gen = cctx_gen;
1199 cctx->flags = 0;
1200 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1201
1202 return cctx;
1203}
1204
1205/* create a new cctx only suitable as source */
1206static coro_cctx *
1207cctx_new_empty ()
1208{
1209 coro_cctx *cctx = cctx_new ();
1210
1211 cctx->sptr = 0;
1212 coro_create (&cctx->cctx, 0, 0, 0, 0);
1213
1214 return cctx;
1215}
1216
1217/* create a new cctx suitable as destination/running a perl interpreter */
1218static coro_cctx *
1219cctx_new_run ()
1220{
1221 coro_cctx *cctx = cctx_new ();
1222 void *stack_start;
1223 size_t stack_size;
1224
1225#if HAVE_MMAP
1226 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1227 /* mmap supposedly does allocate-on-write for us */
1228 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1229
1230 if (cctx->sptr != (void *)-1)
1231 {
1232 #if CORO_STACKGUARD
1233 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1234 #endif
1235 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1236 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1237 cctx->flags |= CC_MAPPED;
1238 }
1239 else
1240#endif
1241 {
1242 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1243 New (0, cctx->sptr, cctx_stacksize, long);
1244
1245 if (!cctx->sptr)
1246 {
1247 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1248 _exit (EXIT_FAILURE);
1249 }
1250
1251 stack_start = cctx->sptr;
1252 stack_size = cctx->ssize;
1253 }
1254
1255 #if CORO_USE_VALGRIND
1256 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1257 #endif
1258
1259 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1260
1261 return cctx;
1262}
1263
1264static void
1265cctx_destroy (coro_cctx *cctx)
1266{
1267 if (!cctx)
1268 return;
1269
1270 assert (cctx != cctx_current);//D temporary
1271
1272 --cctx_count;
1273 coro_destroy (&cctx->cctx);
1274
1275 /* coro_transfer creates new, empty cctx's */
1276 if (cctx->sptr)
1277 {
1278 #if CORO_USE_VALGRIND
1279 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1280 #endif
1281
1282#if HAVE_MMAP
1283 if (cctx->flags & CC_MAPPED)
1284 munmap (cctx->sptr, cctx->ssize);
1285 else
1286#endif
1287 Safefree (cctx->sptr);
1288 }
1289
1290 Safefree (cctx);
1291}
1292
1293/* wether this cctx should be destructed */
1294#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1295
1296static coro_cctx *
1297cctx_get (pTHX)
1298{
1299 while (expect_true (cctx_first))
1300 {
1301 coro_cctx *cctx = cctx_first;
1302 cctx_first = cctx->next;
1303 --cctx_idle;
1304
1305 if (expect_true (!CCTX_EXPIRED (cctx)))
1306 return cctx;
1307
1308 cctx_destroy (cctx);
1309 }
1310
1311 return cctx_new_run ();
1312}
1313
1314static void
1315cctx_put (coro_cctx *cctx)
1316{
1317 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1318
1319 /* free another cctx if overlimit */
1320 if (expect_false (cctx_idle >= cctx_max_idle))
1321 {
1322 coro_cctx *first = cctx_first;
1323 cctx_first = first->next;
1324 --cctx_idle;
1325
1326 cctx_destroy (first);
1327 }
1328
1329 ++cctx_idle;
1330 cctx->next = cctx_first;
1331 cctx_first = cctx;
1332}
1333
1334/** coroutine switching *****************************************************/
1335
1336static void
1337transfer_check (pTHX_ struct coro *prev, struct coro *next)
1338{
1339 /* TODO: throwing up here is considered harmful */
1340
1341 if (expect_true (prev != next))
1342 {
1343 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1344 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1345
1346 if (expect_false (next->flags & CF_RUNNING))
1347 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1348
1349 if (expect_false (next->flags & CF_DESTROYED))
1350 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1351
1352#if !PERL_VERSION_ATLEAST (5,10,0)
1353 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1354 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1355#endif
1356 }
1357}
1358
1359/* always use the TRANSFER macro */
1360static void NOINLINE /* noinline so we have a fixed stackframe */
1361transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1362{
1363 dSTACKLEVEL;
1364
1365 /* sometimes transfer is only called to set idle_sp */
1366 if (expect_false (!prev))
1367 {
1368 cctx_current->idle_sp = STACKLEVEL;
1369 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1370 }
1371 else if (expect_true (prev != next))
1372 {
1373 coro_cctx *cctx_prev;
1374
1375 if (expect_false (prev->flags & CF_NEW))
1376 {
1377 /* create a new empty/source context */
1378 prev->flags &= ~CF_NEW;
1379 prev->flags |= CF_RUNNING;
1380 }
1381
1382 prev->flags &= ~CF_RUNNING;
1383 next->flags |= CF_RUNNING;
1384
1385 /* first get rid of the old state */
1386 save_perl (aTHX_ prev);
1387
1388 if (expect_false (next->flags & CF_NEW))
1389 {
1390 /* need to start coroutine */
1391 next->flags &= ~CF_NEW;
1392 /* setup coroutine call */
1393 coro_setup (aTHX_ next);
1394 }
1395 else
1396 load_perl (aTHX_ next);
1397
1398 assert (!prev->cctx);//D temporary
1399
1400 /* possibly untie and reuse the cctx */
1401 if (expect_true (
1402 cctx_current->idle_sp == STACKLEVEL
1403 && !(cctx_current->flags & CC_TRACE)
1404 && !force_cctx
1405 ))
1406 {
1407 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1408 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1409
1410 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1411 /* without this the next cctx_get might destroy the running cctx while still in use */
1412 if (expect_false (CCTX_EXPIRED (cctx_current)))
1413 if (expect_true (!next->cctx))
1414 next->cctx = cctx_get (aTHX);
1415
1416 cctx_put (cctx_current);
1417 }
1418 else
1419 prev->cctx = cctx_current;
1420
1421 ++next->usecount;
1422
1423 cctx_prev = cctx_current;
1424 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1425
1426 next->cctx = 0;
1427
1428 if (expect_false (cctx_prev != cctx_current))
1429 {
1430 cctx_prev->top_env = PL_top_env;
1431 PL_top_env = cctx_current->top_env;
1432 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1433 }
1434
1435 transfer_tail (aTHX);
1436 }
1437}
1438
1439#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1440#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1441
1442/** high level stuff ********************************************************/
1443
1444static int
1445coro_state_destroy (pTHX_ struct coro *coro)
1446{
1447 if (coro->flags & CF_DESTROYED)
1448 return 0;
1449
1450 if (coro->on_destroy)
1451 coro->on_destroy (aTHX_ coro);
1452
1453 coro->flags |= CF_DESTROYED;
1454
1455 if (coro->flags & CF_READY)
1456 {
1457 /* reduce nready, as destroying a ready coro effectively unreadies it */
1458 /* alternative: look through all ready queues and remove the coro */
1459 --coro_nready;
1460 }
1461 else
1462 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1463
1464 if (coro->mainstack && coro->mainstack != main_mainstack)
1465 {
1466 struct coro temp;
1467
1468 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1469
1470 save_perl (aTHX_ &temp);
1471 load_perl (aTHX_ coro);
1472
1473 coro_destruct (aTHX_ coro);
1474
1475 load_perl (aTHX_ &temp);
1476
1477 coro->slot = 0;
1478 }
1479
1480 cctx_destroy (coro->cctx);
1481 SvREFCNT_dec (coro->startcv);
1482 SvREFCNT_dec (coro->args);
1483 SvREFCNT_dec (CORO_THROW);
1484
1485 if (coro->next) coro->next->prev = coro->prev;
1486 if (coro->prev) coro->prev->next = coro->next;
1487 if (coro == coro_first) coro_first = coro->next;
1488
1489 return 1;
1490}
1491
1492static int
1493coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1494{
1495 struct coro *coro = (struct coro *)mg->mg_ptr;
1496 mg->mg_ptr = 0;
1497
1498 coro->hv = 0;
1499
1500 if (--coro->refcnt < 0)
1501 {
1502 coro_state_destroy (aTHX_ coro);
1503 Safefree (coro);
1504 }
1505
1506 return 0;
1507}
1508
1509static int
1510coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1511{
1512 struct coro *coro = (struct coro *)mg->mg_ptr;
1513
1514 ++coro->refcnt;
1515
1516 return 0;
1517}
1518
1519static MGVTBL coro_state_vtbl = {
1520 0, 0, 0, 0,
1521 coro_state_free,
1522 0,
1523#ifdef MGf_DUP
1524 coro_state_dup,
1525#else
1526# define MGf_DUP 0
1527#endif
1528};
1529
1530static void
1531prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1532{
1533 ta->prev = SvSTATE (prev_sv);
1534 ta->next = SvSTATE (next_sv);
1535 TRANSFER_CHECK (*ta);
1536}
1537
1538static void
1539api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1540{
1541 struct coro_transfer_args ta;
1542
1543 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1544 TRANSFER (ta, 1);
1545}
1546
1547/*****************************************************************************/
1548/* gensub: simple closure generation utility */
1549
1550#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1551
1552/* create a closure from XS, returns a code reference */
1553/* the arg can be accessed via GENSUB_ARG from the callback */
1554/* the callback must use dXSARGS/XSRETURN */
1555static SV *
1556gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1557{
1558 CV *cv = (CV *)newSV (0);
1559
1560 sv_upgrade ((SV *)cv, SVt_PVCV);
1561
1562 CvANON_on (cv);
1563 CvISXSUB_on (cv);
1564 CvXSUB (cv) = xsub;
1565 GENSUB_ARG = arg;
1566
1567 return newRV_noinc ((SV *)cv);
1568}
1569
1570/** Coro ********************************************************************/
1571
1572INLINE void
1573coro_enq (pTHX_ struct coro *coro)
1574{
1575 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1576}
1577
1578INLINE SV *
1579coro_deq (pTHX)
1580{
1581 int prio;
1582
1583 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1584 if (AvFILLp (coro_ready [prio]) >= 0)
1585 return av_shift (coro_ready [prio]);
1586
1587 return 0;
1588}
1589
1590static int
1591api_ready (pTHX_ SV *coro_sv)
1592{
1593 struct coro *coro;
1594 SV *sv_hook;
1595 void (*xs_hook)(void);
1596
1597 coro = SvSTATE (coro_sv);
1598
1599 if (coro->flags & CF_READY)
1600 return 0;
1601
1602 coro->flags |= CF_READY;
1603
1604 sv_hook = coro_nready ? 0 : coro_readyhook;
1605 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1606
1607 coro_enq (aTHX_ coro);
1608 ++coro_nready;
1609
1610 if (sv_hook)
1611 {
1612 dSP;
1613
1614 ENTER;
1615 SAVETMPS;
1616
1617 PUSHMARK (SP);
1618 PUTBACK;
1619 call_sv (sv_hook, G_VOID | G_DISCARD);
1620
1621 FREETMPS;
1622 LEAVE;
1623 }
1624
1625 if (xs_hook)
1626 xs_hook ();
1627
1628 return 1;
1629}
1630
1631static int
1632api_is_ready (pTHX_ SV *coro_sv)
1633{
1634 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1635}
1636
1637/* expects to own a reference to next->hv */
1638INLINE void
1639prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1640{
891 prev = SvRV (GvSV (coro_current)); 1641 SV *prev_sv = SvRV (coro_current);
892 next = coro_deq (PRIO_MIN);
893 1642
894 if (!next) 1643 ta->prev = SvSTATE_hv (prev_sv);
895 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1644 ta->next = next;
896 1645
897 /* free this only after the transfer */ 1646 TRANSFER_CHECK (*ta);
1647
1648 SvRV_set (coro_current, (SV *)next->hv);
1649
1650 free_coro_mortal (aTHX);
898 coro_mortal = prev; 1651 coro_mortal = prev_sv;
899 SV_CORO (prev, "Coro::schedule");
900
901 SvRV (GvSV (coro_current)) = next;
902
903 SV_CORO (next, "Coro::schedule");
904
905 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
906 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
907} 1652}
908 1653
909static void 1654static void
910api_cede (void) 1655prepare_schedule (pTHX_ struct coro_transfer_args *ta)
911{ 1656{
912 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1657 for (;;)
1658 {
1659 SV *next_sv = coro_deq (aTHX);
913 1660
1661 if (expect_true (next_sv))
1662 {
1663 struct coro *next = SvSTATE_hv (next_sv);
1664
1665 /* cannot transfer to destroyed coros, skip and look for next */
1666 if (expect_false (next->flags & CF_DESTROYED))
1667 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1668 else
1669 {
1670 next->flags &= ~CF_READY;
1671 --coro_nready;
1672
1673 prepare_schedule_to (aTHX_ ta, next);
1674 break;
1675 }
1676 }
1677 else
1678 {
1679 /* nothing to schedule: call the idle handler */
1680 if (SvROK (sv_idle)
1681 && SvOBJECT (SvRV (sv_idle)))
1682 {
1683 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
1684 api_ready (aTHX_ SvRV (sv_idle));
1685 --coro_nready;
1686 }
1687 else
1688 {
1689 dSP;
1690
1691 ENTER;
1692 SAVETMPS;
1693
1694 PUSHMARK (SP);
1695 PUTBACK;
1696 call_sv (sv_idle, G_VOID | G_DISCARD);
1697
1698 FREETMPS;
1699 LEAVE;
1700 }
1701 }
1702 }
1703}
1704
1705INLINE void
1706prepare_cede (pTHX_ struct coro_transfer_args *ta)
1707{
1708 api_ready (aTHX_ coro_current);
1709 prepare_schedule (aTHX_ ta);
1710}
1711
1712INLINE void
1713prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1714{
1715 SV *prev = SvRV (coro_current);
1716
1717 if (coro_nready)
1718 {
1719 prepare_schedule (aTHX_ ta);
1720 api_ready (aTHX_ prev);
1721 }
1722 else
1723 prepare_nop (aTHX_ ta);
1724}
1725
1726static void
914 api_schedule (); 1727api_schedule (pTHX)
915} 1728{
1729 struct coro_transfer_args ta;
916 1730
1731 prepare_schedule (aTHX_ &ta);
1732 TRANSFER (ta, 1);
1733}
1734
1735static void
1736api_schedule_to (pTHX_ SV *coro_sv)
1737{
1738 struct coro_transfer_args ta;
1739 struct coro *next = SvSTATE (coro_sv);
1740
1741 SvREFCNT_inc_NN (coro_sv);
1742 prepare_schedule_to (aTHX_ &ta, next);
1743}
1744
1745static int
1746api_cede (pTHX)
1747{
1748 struct coro_transfer_args ta;
1749
1750 prepare_cede (aTHX_ &ta);
1751
1752 if (expect_true (ta.prev != ta.next))
1753 {
1754 TRANSFER (ta, 1);
1755 return 1;
1756 }
1757 else
1758 return 0;
1759}
1760
1761static int
1762api_cede_notself (pTHX)
1763{
1764 if (coro_nready)
1765 {
1766 struct coro_transfer_args ta;
1767
1768 prepare_cede_notself (aTHX_ &ta);
1769 TRANSFER (ta, 1);
1770 return 1;
1771 }
1772 else
1773 return 0;
1774}
1775
1776static void
1777api_trace (pTHX_ SV *coro_sv, int flags)
1778{
1779 struct coro *coro = SvSTATE (coro_sv);
1780
1781 if (coro->flags & CF_RUNNING)
1782 croak ("cannot enable tracing on a running coroutine, caught");
1783
1784 if (flags & CC_TRACE)
1785 {
1786 if (!coro->cctx)
1787 coro->cctx = cctx_new_run ();
1788 else if (!(coro->cctx->flags & CC_TRACE))
1789 croak ("cannot enable tracing on coroutine with custom stack, caught");
1790
1791 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1792 }
1793 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1794 {
1795 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1796
1797 if (coro->flags & CF_RUNNING)
1798 PL_runops = RUNOPS_DEFAULT;
1799 else
1800 coro->slot->runops = RUNOPS_DEFAULT;
1801 }
1802}
1803
1804static void
1805coro_call_on_destroy (pTHX_ struct coro *coro)
1806{
1807 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1808 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1809
1810 if (on_destroyp)
1811 {
1812 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1813
1814 while (AvFILLp (on_destroy) >= 0)
1815 {
1816 dSP; /* don't disturb outer sp */
1817 SV *cb = av_pop (on_destroy);
1818
1819 PUSHMARK (SP);
1820
1821 if (statusp)
1822 {
1823 int i;
1824 AV *status = (AV *)SvRV (*statusp);
1825 EXTEND (SP, AvFILLp (status) + 1);
1826
1827 for (i = 0; i <= AvFILLp (status); ++i)
1828 PUSHs (AvARRAY (status)[i]);
1829 }
1830
1831 PUTBACK;
1832 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1833 }
1834 }
1835}
1836
1837static void
1838slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1839{
1840 int i;
1841 HV *hv = (HV *)SvRV (coro_current);
1842 AV *av = newAV ();
1843
1844 av_extend (av, items - 1);
1845 for (i = 0; i < items; ++i)
1846 av_push (av, SvREFCNT_inc_NN (arg [i]));
1847
1848 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1849
1850 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1851 api_ready (aTHX_ sv_manager);
1852
1853 frame->prepare = prepare_schedule;
1854 frame->check = slf_check_repeat;
1855}
1856
1857/*****************************************************************************/
1858/* async pool handler */
1859
1860static int
1861slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1862{
1863 HV *hv = (HV *)SvRV (coro_current);
1864 struct coro *coro = (struct coro *)frame->data;
1865
1866 if (!coro->invoke_cb)
1867 return 1; /* loop till we have invoke */
1868 else
1869 {
1870 hv_store (hv, "desc", sizeof ("desc") - 1,
1871 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1872
1873 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1874
1875 {
1876 dSP;
1877 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1878 PUTBACK;
1879 }
1880
1881 SvREFCNT_dec (GvAV (PL_defgv));
1882 GvAV (PL_defgv) = coro->invoke_av;
1883 coro->invoke_av = 0;
1884
1885 return 0;
1886 }
1887}
1888
1889static void
1890slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1891{
1892 HV *hv = (HV *)SvRV (coro_current);
1893 struct coro *coro = SvSTATE_hv ((SV *)hv);
1894
1895 if (expect_true (coro->saved_deffh))
1896 {
1897 /* subsequent iteration */
1898 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1899 coro->saved_deffh = 0;
1900
1901 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1902 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1903 {
1904 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1905 coro->invoke_av = newAV ();
1906
1907 frame->prepare = prepare_nop;
1908 }
1909 else
1910 {
1911 av_clear (GvAV (PL_defgv));
1912 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1913
1914 coro->prio = 0;
1915
1916 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1917 api_trace (aTHX_ coro_current, 0);
1918
1919 frame->prepare = prepare_schedule;
1920 av_push (av_async_pool, SvREFCNT_inc (hv));
1921 }
1922 }
1923 else
1924 {
1925 /* first iteration, simply fall through */
1926 frame->prepare = prepare_nop;
1927 }
1928
1929 frame->check = slf_check_pool_handler;
1930 frame->data = (void *)coro;
1931}
1932
1933/*****************************************************************************/
1934/* rouse callback */
1935
1936#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1937
1938static void
1939coro_rouse_callback (pTHX_ CV *cv)
1940{
1941 dXSARGS;
1942 SV *data = (SV *)GENSUB_ARG;
1943
1944 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1945 {
1946 /* first call, set args */
1947 AV *av = newAV ();
1948 SV *coro = SvRV (data);
1949
1950 SvRV_set (data, (SV *)av);
1951 api_ready (aTHX_ coro);
1952 SvREFCNT_dec (coro);
1953
1954 /* better take a full copy of the arguments */
1955 while (items--)
1956 av_store (av, items, newSVsv (ST (items)));
1957 }
1958
1959 XSRETURN_EMPTY;
1960}
1961
1962static int
1963slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1964{
1965 SV *data = (SV *)frame->data;
1966
1967 if (CORO_THROW)
1968 return 0;
1969
1970 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1971 return 1;
1972
1973 /* now push all results on the stack */
1974 {
1975 dSP;
1976 AV *av = (AV *)SvRV (data);
1977 int i;
1978
1979 EXTEND (SP, AvFILLp (av) + 1);
1980 for (i = 0; i <= AvFILLp (av); ++i)
1981 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1982
1983 /* we have stolen the elements, so ste length to zero and free */
1984 AvFILLp (av) = -1;
1985 av_undef (av);
1986
1987 PUTBACK;
1988 }
1989
1990 return 0;
1991}
1992
1993static void
1994slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1995{
1996 SV *cb;
1997
1998 if (items)
1999 cb = arg [0];
2000 else
2001 {
2002 struct coro *coro = SvSTATE_current;
2003
2004 if (!coro->rouse_cb)
2005 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2006
2007 cb = sv_2mortal (coro->rouse_cb);
2008 coro->rouse_cb = 0;
2009 }
2010
2011 if (!SvROK (cb)
2012 || SvTYPE (SvRV (cb)) != SVt_PVCV
2013 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2014 croak ("Coro::rouse_wait called with illegal callback argument,");
2015
2016 {
2017 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2018 SV *data = (SV *)GENSUB_ARG;
2019
2020 frame->data = (void *)data;
2021 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2022 frame->check = slf_check_rouse_wait;
2023 }
2024}
2025
2026static SV *
2027coro_new_rouse_cb (pTHX)
2028{
2029 HV *hv = (HV *)SvRV (coro_current);
2030 struct coro *coro = SvSTATE_hv (hv);
2031 SV *data = newRV_inc ((SV *)hv);
2032 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2033
2034 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2035 SvREFCNT_dec (data); /* magicext increases the refcount */
2036
2037 SvREFCNT_dec (coro->rouse_cb);
2038 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2039
2040 return cb;
2041}
2042
2043/*****************************************************************************/
2044/* schedule-like-function opcode (SLF) */
2045
2046static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2047static const CV *slf_cv;
2048static SV **slf_argv;
2049static int slf_argc, slf_arga; /* count, allocated */
2050static I32 slf_ax; /* top of stack, for restore */
2051
2052/* this restores the stack in the case we patched the entersub, to */
2053/* recreate the stack frame as perl will on following calls */
2054/* since entersub cleared the stack */
2055static OP *
2056pp_restore (pTHX)
2057{
2058 int i;
2059 SV **SP = PL_stack_base + slf_ax;
2060
2061 PUSHMARK (SP);
2062
2063 EXTEND (SP, slf_argc + 1);
2064
2065 for (i = 0; i < slf_argc; ++i)
2066 PUSHs (sv_2mortal (slf_argv [i]));
2067
2068 PUSHs ((SV *)CvGV (slf_cv));
2069
2070 RETURNOP (slf_restore.op_first);
2071}
2072
2073static void
2074slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2075{
2076 SV **arg = (SV **)slf_frame.data;
2077
2078 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2079}
2080
2081static void
2082slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2083{
2084 if (items != 2)
2085 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2086
2087 frame->prepare = slf_prepare_transfer;
2088 frame->check = slf_check_nop;
2089 frame->data = (void *)arg; /* let's hope it will stay valid */
2090}
2091
2092static void
2093slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2094{
2095 frame->prepare = prepare_schedule;
2096 frame->check = slf_check_nop;
2097}
2098
2099static void
2100slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2101{
2102 struct coro *next = (struct coro *)slf_frame.data;
2103
2104 SvREFCNT_inc_NN (next->hv);
2105 prepare_schedule_to (aTHX_ ta, next);
2106}
2107
2108static void
2109slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2110{
2111 if (!items)
2112 croak ("Coro::schedule_to expects a coroutine argument, caught");
2113
2114 frame->data = (void *)SvSTATE (arg [0]);
2115 frame->prepare = slf_prepare_schedule_to;
2116 frame->check = slf_check_nop;
2117}
2118
2119static void
2120slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2121{
2122 api_ready (aTHX_ SvRV (coro_current));
2123
2124 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2125}
2126
2127static void
2128slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2129{
2130 frame->prepare = prepare_cede;
2131 frame->check = slf_check_nop;
2132}
2133
2134static void
2135slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2136{
2137 frame->prepare = prepare_cede_notself;
2138 frame->check = slf_check_nop;
2139}
2140
2141/*
2142 * these not obviously related functions are all rolled into one
2143 * function to increase chances that they all will call transfer with the same
2144 * stack offset
2145 * SLF stands for "schedule-like-function".
2146 */
2147static OP *
2148pp_slf (pTHX)
2149{
2150 I32 checkmark; /* mark SP to see how many elements check has pushed */
2151
2152 /* set up the slf frame, unless it has already been set-up */
2153 /* the latter happens when a new coro has been started */
2154 /* or when a new cctx was attached to an existing coroutine */
2155 if (expect_true (!slf_frame.prepare))
2156 {
2157 /* first iteration */
2158 dSP;
2159 SV **arg = PL_stack_base + TOPMARK + 1;
2160 int items = SP - arg; /* args without function object */
2161 SV *gv = *sp;
2162
2163 /* do a quick consistency check on the "function" object, and if it isn't */
2164 /* for us, divert to the real entersub */
2165 if (SvTYPE (gv) != SVt_PVGV
2166 || !GvCV (gv)
2167 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2168 return PL_ppaddr[OP_ENTERSUB](aTHX);
2169
2170 if (!(PL_op->op_flags & OPf_STACKED))
2171 {
2172 /* ampersand-form of call, use @_ instead of stack */
2173 AV *av = GvAV (PL_defgv);
2174 arg = AvARRAY (av);
2175 items = AvFILLp (av) + 1;
2176 }
2177
2178 /* now call the init function, which needs to set up slf_frame */
2179 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2180 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2181
2182 /* pop args */
2183 SP = PL_stack_base + POPMARK;
2184
2185 PUTBACK;
2186 }
2187
2188 /* now that we have a slf_frame, interpret it! */
2189 /* we use a callback system not to make the code needlessly */
2190 /* complicated, but so we can run multiple perl coros from one cctx */
2191
2192 do
2193 {
2194 struct coro_transfer_args ta;
2195
2196 slf_frame.prepare (aTHX_ &ta);
2197 TRANSFER (ta, 0);
2198
2199 checkmark = PL_stack_sp - PL_stack_base;
2200 }
2201 while (slf_frame.check (aTHX_ &slf_frame));
2202
2203 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2204
2205 /* exception handling */
2206 if (expect_false (CORO_THROW))
2207 {
2208 SV *exception = sv_2mortal (CORO_THROW);
2209
2210 CORO_THROW = 0;
2211 sv_setsv (ERRSV, exception);
2212 croak (0);
2213 }
2214
2215 /* return value handling - mostly like entersub */
2216 /* make sure we put something on the stack in scalar context */
2217 if (GIMME_V == G_SCALAR)
2218 {
2219 dSP;
2220 SV **bot = PL_stack_base + checkmark;
2221
2222 if (sp == bot) /* too few, push undef */
2223 bot [1] = &PL_sv_undef;
2224 else if (sp != bot + 1) /* too many, take last one */
2225 bot [1] = *sp;
2226
2227 SP = bot + 1;
2228
2229 PUTBACK;
2230 }
2231
2232 return NORMAL;
2233}
2234
2235static void
2236api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2237{
2238 int i;
2239 SV **arg = PL_stack_base + ax;
2240 int items = PL_stack_sp - arg + 1;
2241
2242 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2243
2244 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2245 && PL_op->op_ppaddr != pp_slf)
2246 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2247
2248 CvFLAGS (cv) |= CVf_SLF;
2249 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2250 slf_cv = cv;
2251
2252 /* we patch the op, and then re-run the whole call */
2253 /* we have to put the same argument on the stack for this to work */
2254 /* and this will be done by pp_restore */
2255 slf_restore.op_next = (OP *)&slf_restore;
2256 slf_restore.op_type = OP_CUSTOM;
2257 slf_restore.op_ppaddr = pp_restore;
2258 slf_restore.op_first = PL_op;
2259
2260 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2261
2262 if (PL_op->op_flags & OPf_STACKED)
2263 {
2264 if (items > slf_arga)
2265 {
2266 slf_arga = items;
2267 free (slf_argv);
2268 slf_argv = malloc (slf_arga * sizeof (SV *));
2269 }
2270
2271 slf_argc = items;
2272
2273 for (i = 0; i < items; ++i)
2274 slf_argv [i] = SvREFCNT_inc (arg [i]);
2275 }
2276 else
2277 slf_argc = 0;
2278
2279 PL_op->op_ppaddr = pp_slf;
2280 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2281
2282 PL_op = (OP *)&slf_restore;
2283}
2284
2285/*****************************************************************************/
2286/* PerlIO::cede */
2287
2288typedef struct
2289{
2290 PerlIOBuf base;
2291 NV next, every;
2292} PerlIOCede;
2293
2294static IV
2295PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2296{
2297 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2298
2299 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2300 self->next = nvtime () + self->every;
2301
2302 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2303}
2304
2305static SV *
2306PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2307{
2308 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2309
2310 return newSVnv (self->every);
2311}
2312
2313static IV
2314PerlIOCede_flush (pTHX_ PerlIO *f)
2315{
2316 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2317 double now = nvtime ();
2318
2319 if (now >= self->next)
2320 {
2321 api_cede (aTHX);
2322 self->next = now + self->every;
2323 }
2324
2325 return PerlIOBuf_flush (aTHX_ f);
2326}
2327
2328static PerlIO_funcs PerlIO_cede =
2329{
2330 sizeof(PerlIO_funcs),
2331 "cede",
2332 sizeof(PerlIOCede),
2333 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2334 PerlIOCede_pushed,
2335 PerlIOBuf_popped,
2336 PerlIOBuf_open,
2337 PerlIOBase_binmode,
2338 PerlIOCede_getarg,
2339 PerlIOBase_fileno,
2340 PerlIOBuf_dup,
2341 PerlIOBuf_read,
2342 PerlIOBuf_unread,
2343 PerlIOBuf_write,
2344 PerlIOBuf_seek,
2345 PerlIOBuf_tell,
2346 PerlIOBuf_close,
2347 PerlIOCede_flush,
2348 PerlIOBuf_fill,
2349 PerlIOBase_eof,
2350 PerlIOBase_error,
2351 PerlIOBase_clearerr,
2352 PerlIOBase_setlinebuf,
2353 PerlIOBuf_get_base,
2354 PerlIOBuf_bufsiz,
2355 PerlIOBuf_get_ptr,
2356 PerlIOBuf_get_cnt,
2357 PerlIOBuf_set_ptrcnt,
2358};
2359
2360/*****************************************************************************/
2361/* Coro::Semaphore & Coro::Signal */
2362
2363static SV *
2364coro_waitarray_new (pTHX_ int count)
2365{
2366 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2367 AV *av = newAV ();
2368 SV **ary;
2369
2370 /* unfortunately, building manually saves memory */
2371 Newx (ary, 2, SV *);
2372 AvALLOC (av) = ary;
2373#if PERL_VERSION_ATLEAST (5,10,0)
2374 AvARRAY (av) = ary;
2375#else
2376 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2377 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2378 SvPVX ((SV *)av) = (char *)ary;
2379#endif
2380 AvMAX (av) = 1;
2381 AvFILLp (av) = 0;
2382 ary [0] = newSViv (count);
2383
2384 return newRV_noinc ((SV *)av);
2385}
2386
2387/* semaphore */
2388
2389static void
2390coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2391{
2392 SV *count_sv = AvARRAY (av)[0];
2393 IV count = SvIVX (count_sv);
2394
2395 count += adjust;
2396 SvIVX (count_sv) = count;
2397
2398 /* now wake up as many waiters as are expected to lock */
2399 while (count > 0 && AvFILLp (av) > 0)
2400 {
2401 SV *cb;
2402
2403 /* swap first two elements so we can shift a waiter */
2404 AvARRAY (av)[0] = AvARRAY (av)[1];
2405 AvARRAY (av)[1] = count_sv;
2406 cb = av_shift (av);
2407
2408 if (SvOBJECT (cb))
2409 {
2410 api_ready (aTHX_ cb);
2411 --count;
2412 }
2413 else if (SvTYPE (cb) == SVt_PVCV)
2414 {
2415 dSP;
2416 PUSHMARK (SP);
2417 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2418 PUTBACK;
2419 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2420 }
2421
2422 SvREFCNT_dec (cb);
2423 }
2424}
2425
2426static void
2427coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2428{
2429 /* call $sem->adjust (0) to possibly wake up some other waiters */
2430 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2431}
2432
2433static int
2434slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2435{
2436 AV *av = (AV *)frame->data;
2437 SV *count_sv = AvARRAY (av)[0];
2438
2439 /* if we are about to throw, don't actually acquire the lock, just throw */
2440 if (CORO_THROW)
2441 return 0;
2442 else if (SvIVX (count_sv) > 0)
2443 {
2444 SvSTATE_current->on_destroy = 0;
2445
2446 if (acquire)
2447 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2448 else
2449 coro_semaphore_adjust (aTHX_ av, 0);
2450
2451 return 0;
2452 }
2453 else
2454 {
2455 int i;
2456 /* if we were woken up but can't down, we look through the whole */
2457 /* waiters list and only add us if we aren't in there already */
2458 /* this avoids some degenerate memory usage cases */
2459
2460 for (i = 1; i <= AvFILLp (av); ++i)
2461 if (AvARRAY (av)[i] == SvRV (coro_current))
2462 return 1;
2463
2464 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2465 return 1;
2466 }
2467}
2468
2469static int
2470slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2471{
2472 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2473}
2474
2475static int
2476slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2477{
2478 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2479}
2480
2481static void
2482slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2483{
2484 AV *av = (AV *)SvRV (arg [0]);
2485
2486 if (SvIVX (AvARRAY (av)[0]) > 0)
2487 {
2488 frame->data = (void *)av;
2489 frame->prepare = prepare_nop;
2490 }
2491 else
2492 {
2493 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2494
2495 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2496 frame->prepare = prepare_schedule;
2497
2498 /* to avoid race conditions when a woken-up coro gets terminated */
2499 /* we arrange for a temporary on_destroy that calls adjust (0) */
2500 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2501 }
2502}
2503
2504static void
2505slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2506{
2507 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2508 frame->check = slf_check_semaphore_down;
2509}
2510
2511static void
2512slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2513{
2514 if (items >= 2)
2515 {
2516 /* callback form */
2517 AV *av = (AV *)SvRV (arg [0]);
2518 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2519
2520 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2521
2522 if (SvIVX (AvARRAY (av)[0]) > 0)
2523 coro_semaphore_adjust (aTHX_ av, 0);
2524
2525 frame->prepare = prepare_nop;
2526 frame->check = slf_check_nop;
2527 }
2528 else
2529 {
2530 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2531 frame->check = slf_check_semaphore_wait;
2532 }
2533}
2534
2535/* signal */
2536
2537static void
2538coro_signal_wake (pTHX_ AV *av, int count)
2539{
2540 SvIVX (AvARRAY (av)[0]) = 0;
2541
2542 /* now signal count waiters */
2543 while (count > 0 && AvFILLp (av) > 0)
2544 {
2545 SV *cb;
2546
2547 /* swap first two elements so we can shift a waiter */
2548 cb = AvARRAY (av)[0];
2549 AvARRAY (av)[0] = AvARRAY (av)[1];
2550 AvARRAY (av)[1] = cb;
2551
2552 cb = av_shift (av);
2553
2554 api_ready (aTHX_ cb);
2555 sv_setiv (cb, 0); /* signal waiter */
2556 SvREFCNT_dec (cb);
2557
2558 --count;
2559 }
2560}
2561
2562static int
2563slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2564{
2565 /* if we are about to throw, also stop waiting */
2566 return SvROK ((SV *)frame->data) && !CORO_THROW;
2567}
2568
2569static void
2570slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2571{
2572 AV *av = (AV *)SvRV (arg [0]);
2573
2574 if (SvIVX (AvARRAY (av)[0]))
2575 {
2576 SvIVX (AvARRAY (av)[0]) = 0;
2577 frame->prepare = prepare_nop;
2578 frame->check = slf_check_nop;
2579 }
2580 else
2581 {
2582 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2583
2584 av_push (av, waiter);
2585
2586 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2587 frame->prepare = prepare_schedule;
2588 frame->check = slf_check_signal_wait;
2589 }
2590}
2591
2592/*****************************************************************************/
2593/* Coro::AIO */
2594
2595#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2596
2597/* helper storage struct */
2598struct io_state
2599{
2600 int errorno;
2601 I32 laststype; /* U16 in 5.10.0 */
2602 int laststatval;
2603 Stat_t statcache;
2604};
2605
2606static void
2607coro_aio_callback (pTHX_ CV *cv)
2608{
2609 dXSARGS;
2610 AV *state = (AV *)GENSUB_ARG;
2611 SV *coro = av_pop (state);
2612 SV *data_sv = newSV (sizeof (struct io_state));
2613
2614 av_extend (state, items - 1);
2615
2616 sv_upgrade (data_sv, SVt_PV);
2617 SvCUR_set (data_sv, sizeof (struct io_state));
2618 SvPOK_only (data_sv);
2619
2620 {
2621 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2622
2623 data->errorno = errno;
2624 data->laststype = PL_laststype;
2625 data->laststatval = PL_laststatval;
2626 data->statcache = PL_statcache;
2627 }
2628
2629 /* now build the result vector out of all the parameters and the data_sv */
2630 {
2631 int i;
2632
2633 for (i = 0; i < items; ++i)
2634 av_push (state, SvREFCNT_inc_NN (ST (i)));
2635 }
2636
2637 av_push (state, data_sv);
2638
2639 api_ready (aTHX_ coro);
2640 SvREFCNT_dec (coro);
2641 SvREFCNT_dec ((AV *)state);
2642}
2643
2644static int
2645slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2646{
2647 AV *state = (AV *)frame->data;
2648
2649 /* if we are about to throw, return early */
2650 /* this does not cancel the aio request, but at least */
2651 /* it quickly returns */
2652 if (CORO_THROW)
2653 return 0;
2654
2655 /* one element that is an RV? repeat! */
2656 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2657 return 1;
2658
2659 /* restore status */
2660 {
2661 SV *data_sv = av_pop (state);
2662 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2663
2664 errno = data->errorno;
2665 PL_laststype = data->laststype;
2666 PL_laststatval = data->laststatval;
2667 PL_statcache = data->statcache;
2668
2669 SvREFCNT_dec (data_sv);
2670 }
2671
2672 /* push result values */
2673 {
2674 dSP;
2675 int i;
2676
2677 EXTEND (SP, AvFILLp (state) + 1);
2678 for (i = 0; i <= AvFILLp (state); ++i)
2679 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2680
2681 PUTBACK;
2682 }
2683
2684 return 0;
2685}
2686
2687static void
2688slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2689{
2690 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2691 SV *coro_hv = SvRV (coro_current);
2692 struct coro *coro = SvSTATE_hv (coro_hv);
2693
2694 /* put our coroutine id on the state arg */
2695 av_push (state, SvREFCNT_inc_NN (coro_hv));
2696
2697 /* first see whether we have a non-zero priority and set it as AIO prio */
2698 if (coro->prio)
2699 {
2700 dSP;
2701
2702 static SV *prio_cv;
2703 static SV *prio_sv;
2704
2705 if (expect_false (!prio_cv))
2706 {
2707 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2708 prio_sv = newSViv (0);
2709 }
2710
2711 PUSHMARK (SP);
2712 sv_setiv (prio_sv, coro->prio);
2713 XPUSHs (prio_sv);
2714
2715 PUTBACK;
2716 call_sv (prio_cv, G_VOID | G_DISCARD);
2717 }
2718
2719 /* now call the original request */
2720 {
2721 dSP;
2722 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2723 int i;
2724
2725 PUSHMARK (SP);
2726
2727 /* first push all args to the stack */
2728 EXTEND (SP, items + 1);
2729
2730 for (i = 0; i < items; ++i)
2731 PUSHs (arg [i]);
2732
2733 /* now push the callback closure */
2734 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2735
2736 /* now call the AIO function - we assume our request is uncancelable */
2737 PUTBACK;
2738 call_sv ((SV *)req, G_VOID | G_DISCARD);
2739 }
2740
2741 /* now that the requets is going, we loop toll we have a result */
2742 frame->data = (void *)state;
2743 frame->prepare = prepare_schedule;
2744 frame->check = slf_check_aio_req;
2745}
2746
2747static void
2748coro_aio_req_xs (pTHX_ CV *cv)
2749{
2750 dXSARGS;
2751
2752 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2753
2754 XSRETURN_EMPTY;
2755}
2756
2757/*****************************************************************************/
2758
2759#if CORO_CLONE
2760# include "clone.c"
2761#endif
2762
917MODULE = Coro::State PACKAGE = Coro::State 2763MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
918 2764
919PROTOTYPES: ENABLE 2765PROTOTYPES: DISABLE
920 2766
921BOOT: 2767BOOT:
922{ /* {} necessary for stoopid perl-5.6.x */ 2768{
923 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2769#ifdef USE_ITHREADS
924 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2770# if CORO_PTHREAD
2771 coro_thx = PERL_GET_CONTEXT;
2772# endif
2773#endif
2774 BOOT_PAGESIZE;
2775
2776 cctx_current = cctx_new_empty ();
2777
2778 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2779 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2780
2781 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2782 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2783 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2784
2785 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2786 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2787 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2788
925 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2789 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
926 2790
927 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2791 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
928 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2792 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
929 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2793 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
930 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2794 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
931
932 if (!padlist_cache)
933 padlist_cache = newHV ();
934 2795
935 main_mainstack = PL_mainstack; 2796 main_mainstack = PL_mainstack;
2797 main_top_env = PL_top_env;
936 2798
2799 while (main_top_env->je_prev)
2800 main_top_env = main_top_env->je_prev;
2801
2802 {
2803 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2804
2805 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2806 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2807
2808 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2809 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2810 }
2811
937 coroapi.ver = CORO_API_VERSION; 2812 coroapi.ver = CORO_API_VERSION;
2813 coroapi.rev = CORO_API_REVISION;
2814
938 coroapi.transfer = api_transfer; 2815 coroapi.transfer = api_transfer;
939}
940 2816
941Coro::State 2817 coroapi.sv_state = SvSTATE_;
942_newprocess(args) 2818 coroapi.execute_slf = api_execute_slf;
943 SV * args 2819 coroapi.prepare_nop = prepare_nop;
944 PROTOTYPE: $ 2820 coroapi.prepare_schedule = prepare_schedule;
2821 coroapi.prepare_cede = prepare_cede;
2822 coroapi.prepare_cede_notself = prepare_cede_notself;
2823
2824 {
2825 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2826
2827 if (!svp) croak ("Time::HiRes is required");
2828 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2829
2830 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2831 }
2832
2833 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2834}
2835
2836SV *
2837new (char *klass, ...)
2838 ALIAS:
2839 Coro::new = 1
945 CODE: 2840 CODE:
946 Coro__State coro; 2841{
2842 struct coro *coro;
2843 MAGIC *mg;
2844 HV *hv;
2845 CV *cb;
2846 int i;
947 2847
948 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2848 if (items > 1)
949 croak ("Coro::State::_newprocess expects an arrayref");
950 2849 {
2850 cb = coro_sv_2cv (aTHX_ ST (1));
2851
2852 if (!ix)
2853 {
2854 if (CvISXSUB (cb))
2855 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2856
2857 if (!CvROOT (cb))
2858 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2859 }
2860 }
2861
951 Newz (0, coro, 1, struct coro); 2862 Newz (0, coro, 1, struct coro);
2863 coro->args = newAV ();
2864 coro->flags = CF_NEW;
952 2865
953 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2866 if (coro_first) coro_first->prev = coro;
954 coro->mainstack = 0; /* actual work is done inside transfer */ 2867 coro->next = coro_first;
955 coro->stack = 0; 2868 coro_first = coro;
956 2869
957 /* same as JMPENV_BOOTSTRAP */ 2870 coro->hv = hv = newHV ();
958 /* we might be able to recycle start_env, but safe is safe */ 2871 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
959 //Zero(&coro->start_env, 1, JMPENV); 2872 mg->mg_flags |= MGf_DUP;
960 coro->start_env.je_ret = -1; 2873 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
961 coro->start_env.je_mustcatch = TRUE;
962 2874
963 RETVAL = coro; 2875 if (items > 1)
2876 {
2877 av_extend (coro->args, items - 1 + ix - 1);
2878
2879 if (ix)
2880 {
2881 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2882 cb = cv_coro_run;
2883 }
2884
2885 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2886
2887 for (i = 2; i < items; i++)
2888 av_push (coro->args, newSVsv (ST (i)));
2889 }
2890}
964 OUTPUT: 2891 OUTPUT:
965 RETVAL 2892 RETVAL
966 2893
967void 2894void
968transfer(prev, next, flags) 2895transfer (...)
969 SV *prev
970 SV *next
971 int flags
972 PROTOTYPE: @ 2896 PROTOTYPE: $$
973 CODE: 2897 CODE:
974 PUTBACK; 2898 CORO_EXECUTE_SLF_XS (slf_init_transfer);
975 SV_CORO (next, "Coro::transfer"); 2899
976 SV_CORO (prev, "Coro::transfer"); 2900bool
977 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2901_destroy (SV *coro_sv)
978 SPAGAIN; 2902 CODE:
2903 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2904 OUTPUT:
2905 RETVAL
979 2906
980void 2907void
981DESTROY(coro) 2908_exit (int code)
982 Coro::State coro 2909 PROTOTYPE: $
983 CODE: 2910 CODE:
2911 _exit (code);
984 2912
985 if (coro->mainstack && coro->mainstack != main_mainstack) 2913SV *
2914clone (Coro::State coro)
2915 CODE:
2916{
2917#if CORO_CLONE
2918 struct coro *ncoro = coro_clone (coro);
2919 MAGIC *mg;
2920 /* TODO: too much duplication */
2921 ncoro->hv = newHV ();
2922 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2923 mg->mg_flags |= MGf_DUP;
2924 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2925#else
2926 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2927#endif
2928}
2929 OUTPUT:
2930 RETVAL
2931
2932int
2933cctx_stacksize (int new_stacksize = 0)
2934 PROTOTYPE: ;$
2935 CODE:
2936 RETVAL = cctx_stacksize;
2937 if (new_stacksize)
2938 {
2939 cctx_stacksize = new_stacksize;
2940 ++cctx_gen;
2941 }
2942 OUTPUT:
2943 RETVAL
2944
2945int
2946cctx_max_idle (int max_idle = 0)
2947 PROTOTYPE: ;$
2948 CODE:
2949 RETVAL = cctx_max_idle;
2950 if (max_idle > 1)
2951 cctx_max_idle = max_idle;
2952 OUTPUT:
2953 RETVAL
2954
2955int
2956cctx_count ()
2957 PROTOTYPE:
2958 CODE:
2959 RETVAL = cctx_count;
2960 OUTPUT:
2961 RETVAL
2962
2963int
2964cctx_idle ()
2965 PROTOTYPE:
2966 CODE:
2967 RETVAL = cctx_idle;
2968 OUTPUT:
2969 RETVAL
2970
2971void
2972list ()
2973 PROTOTYPE:
2974 PPCODE:
2975{
2976 struct coro *coro;
2977 for (coro = coro_first; coro; coro = coro->next)
2978 if (coro->hv)
2979 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2980}
2981
2982void
2983call (Coro::State coro, SV *coderef)
2984 ALIAS:
2985 eval = 1
2986 CODE:
2987{
2988 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
986 { 2989 {
987 struct coro temp; 2990 struct coro temp;
988 2991
2992 if (!(coro->flags & CF_RUNNING))
2993 {
2994 PUTBACK;
2995 save_perl (aTHX_ &temp);
2996 load_perl (aTHX_ coro);
2997 }
2998
2999 {
3000 dSP;
3001 ENTER;
3002 SAVETMPS;
989 PUTBACK; 3003 PUTBACK;
990 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 3004 PUSHSTACK;
991 LOAD(aTHX_ coro); 3005 PUSHMARK (SP);
3006
3007 if (ix)
3008 eval_sv (coderef, 0);
3009 else
3010 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3011
3012 POPSTACK;
992 SPAGAIN; 3013 SPAGAIN;
3014 FREETMPS;
3015 LEAVE;
3016 PUTBACK;
3017 }
993 3018
994 destroy_stacks (aTHX); 3019 if (!(coro->flags & CF_RUNNING))
995 3020 {
996 LOAD((&temp)); /* this will get rid of defsv etc.. */ 3021 save_perl (aTHX_ coro);
3022 load_perl (aTHX_ &temp);
997 SPAGAIN; 3023 SPAGAIN;
998 3024 }
999 coro->mainstack = 0;
1000 } 3025 }
3026}
1001 3027
1002 deallocate_stack (coro); 3028SV *
1003 SvREFCNT_dec (coro->args); 3029is_ready (Coro::State coro)
1004 Safefree (coro); 3030 PROTOTYPE: $
3031 ALIAS:
3032 is_ready = CF_READY
3033 is_running = CF_RUNNING
3034 is_new = CF_NEW
3035 is_destroyed = CF_DESTROYED
3036 CODE:
3037 RETVAL = boolSV (coro->flags & ix);
3038 OUTPUT:
3039 RETVAL
1005 3040
1006void 3041void
1007_exit(code) 3042throw (Coro::State self, SV *throw = &PL_sv_undef)
1008 int code 3043 PROTOTYPE: $;$
3044 CODE:
3045{
3046 struct coro *current = SvSTATE_current;
3047 SV **throwp = self == current ? &CORO_THROW : &self->except;
3048 SvREFCNT_dec (*throwp);
3049 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3050}
3051
3052void
3053api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3054 PROTOTYPE: $;$
3055 C_ARGS: aTHX_ coro, flags
3056
3057SV *
3058has_cctx (Coro::State coro)
1009 PROTOTYPE: $ 3059 PROTOTYPE: $
1010 CODE: 3060 CODE:
1011#if defined(__GLIBC__) || _POSIX_C_SOURCE 3061 /* maybe manage the running flag differently */
1012 _exit (code); 3062 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
1013#else 3063 OUTPUT:
1014 signal (SIGTERM, SIG_DFL); 3064 RETVAL
1015 raise (SIGTERM);
1016 exit (code);
1017#endif
1018 3065
1019MODULE = Coro::State PACKAGE = Coro::Cont 3066int
3067is_traced (Coro::State coro)
3068 PROTOTYPE: $
3069 CODE:
3070 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3071 OUTPUT:
3072 RETVAL
1020 3073
1021# this is slightly dirty (should expose a c-level api) 3074UV
3075rss (Coro::State coro)
3076 PROTOTYPE: $
3077 ALIAS:
3078 usecount = 1
3079 CODE:
3080 switch (ix)
3081 {
3082 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3083 case 1: RETVAL = coro->usecount; break;
3084 }
3085 OUTPUT:
3086 RETVAL
1022 3087
1023void 3088void
1024yield(...) 3089force_cctx ()
3090 PROTOTYPE:
3091 CODE:
3092 cctx_current->idle_sp = 0;
3093
3094void
3095swap_defsv (Coro::State self)
1025 PROTOTYPE: @ 3096 PROTOTYPE: $
3097 ALIAS:
3098 swap_defav = 1
1026 CODE: 3099 CODE:
1027 static SV *returnstk; 3100 if (!self->slot)
1028 SV *sv; 3101 croak ("cannot swap state with coroutine that has no saved state,");
1029 AV *defav = GvAV (PL_defgv); 3102 else
1030 struct coro *prev, *next; 3103 {
3104 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3105 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1031 3106
1032 if (!returnstk) 3107 SV *tmp = *src; *src = *dst; *dst = tmp;
1033 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE)); 3108 }
1034 3109
1035 /* set up @_ -- ugly */
1036 av_clear (defav);
1037 av_fill (defav, items - 1);
1038 while (items--)
1039 av_store (defav, items, SvREFCNT_inc (ST(items)));
1040
1041 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1042 sv = av_pop ((AV *)SvRV (returnstk));
1043 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1044 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1045 SvREFCNT_dec (sv);
1046
1047 transfer(aTHX_ prev, next, 0);
1048 3110
1049MODULE = Coro::State PACKAGE = Coro 3111MODULE = Coro::State PACKAGE = Coro
1050 3112
1051# this is slightly dirty (should expose a c-level api)
1052
1053BOOT: 3113BOOT:
1054{ 3114{
1055 int i; 3115 int i;
3116
3117 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3118 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3119 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3120 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3121 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3122 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3123 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3124 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3125 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3126
3127 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3128 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3129 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3130 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3131
1056 HV *stash = gv_stashpv ("Coro", TRUE); 3132 coro_stash = gv_stashpv ("Coro", TRUE);
1057 3133
1058 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3134 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1059 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3135 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1060 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3136 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1061 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3137 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1062 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3138 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1063 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3139 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1064
1065 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1066 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1067 3140
1068 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3141 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1069 coro_ready[i] = newAV (); 3142 coro_ready[i] = newAV ();
1070 3143
1071 { 3144 {
1072 SV *sv = perl_get_sv("Coro::API", 1); 3145 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1073 3146
1074 coroapi.schedule = api_schedule; 3147 coroapi.schedule = api_schedule;
3148 coroapi.schedule_to = api_schedule_to;
1075 coroapi.cede = api_cede; 3149 coroapi.cede = api_cede;
3150 coroapi.cede_notself = api_cede_notself;
1076 coroapi.ready = api_ready; 3151 coroapi.ready = api_ready;
3152 coroapi.is_ready = api_is_ready;
1077 coroapi.nready = &coro_nready; 3153 coroapi.nready = coro_nready;
1078 coroapi.current = coro_current; 3154 coroapi.current = coro_current;
1079 3155
1080 GCoroAPI = &coroapi; 3156 /*GCoroAPI = &coroapi;*/
1081 sv_setiv(sv, (IV)&coroapi); 3157 sv_setiv (sv, (IV)&coroapi);
1082 SvREADONLY_on(sv); 3158 SvREADONLY_on (sv);
1083 } 3159 }
1084} 3160}
1085 3161
1086#if !PERL_MICRO
1087
1088void 3162void
1089ready(self) 3163terminate (...)
1090 SV * self 3164 CODE:
3165 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3166
3167void
3168schedule (...)
3169 CODE:
3170 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3171
3172void
3173schedule_to (...)
3174 CODE:
3175 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3176
3177void
3178cede_to (...)
3179 CODE:
3180 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3181
3182void
3183cede (...)
3184 CODE:
3185 CORO_EXECUTE_SLF_XS (slf_init_cede);
3186
3187void
3188cede_notself (...)
3189 CODE:
3190 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3191
3192void
3193_cancel (Coro::State self)
3194 CODE:
3195 coro_state_destroy (aTHX_ self);
3196 coro_call_on_destroy (aTHX_ self);
3197
3198void
3199_set_current (SV *current)
1091 PROTOTYPE: $ 3200 PROTOTYPE: $
1092 CODE: 3201 CODE:
1093 api_ready (self); 3202 SvREFCNT_dec (SvRV (coro_current));
3203 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1094 3204
1095#endif 3205void
3206_set_readyhook (SV *hook)
3207 PROTOTYPE: $
3208 CODE:
3209 SvREFCNT_dec (coro_readyhook);
3210 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1096 3211
1097int 3212int
3213prio (Coro::State coro, int newprio = 0)
3214 PROTOTYPE: $;$
3215 ALIAS:
3216 nice = 1
3217 CODE:
3218{
3219 RETVAL = coro->prio;
3220
3221 if (items > 1)
3222 {
3223 if (ix)
3224 newprio = coro->prio - newprio;
3225
3226 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3227 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3228
3229 coro->prio = newprio;
3230 }
3231}
3232 OUTPUT:
3233 RETVAL
3234
3235SV *
3236ready (SV *self)
3237 PROTOTYPE: $
3238 CODE:
3239 RETVAL = boolSV (api_ready (aTHX_ self));
3240 OUTPUT:
3241 RETVAL
3242
3243int
1098nready(...) 3244nready (...)
1099 PROTOTYPE: 3245 PROTOTYPE:
1100 CODE: 3246 CODE:
1101 RETVAL = coro_nready; 3247 RETVAL = coro_nready;
1102 OUTPUT: 3248 OUTPUT:
1103 RETVAL 3249 RETVAL
1104 3250
1105void 3251void
1106schedule(...) 3252_pool_handler (...)
1107 PROTOTYPE:
1108 CODE: 3253 CODE:
1109 api_schedule (); 3254 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1110 3255
1111void 3256void
1112cede(...) 3257async_pool (SV *cv, ...)
1113 PROTOTYPE: 3258 PROTOTYPE: &@
3259 PPCODE:
3260{
3261 HV *hv = (HV *)av_pop (av_async_pool);
3262 AV *av = newAV ();
3263 SV *cb = ST (0);
3264 int i;
3265
3266 av_extend (av, items - 2);
3267 for (i = 1; i < items; ++i)
3268 av_push (av, SvREFCNT_inc_NN (ST (i)));
3269
3270 if ((SV *)hv == &PL_sv_undef)
3271 {
3272 PUSHMARK (SP);
3273 EXTEND (SP, 2);
3274 PUSHs (sv_Coro);
3275 PUSHs ((SV *)cv_pool_handler);
3276 PUTBACK;
3277 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3278 SPAGAIN;
3279
3280 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3281 }
3282
3283 {
3284 struct coro *coro = SvSTATE_hv (hv);
3285
3286 assert (!coro->invoke_cb);
3287 assert (!coro->invoke_av);
3288 coro->invoke_cb = SvREFCNT_inc (cb);
3289 coro->invoke_av = av;
3290 }
3291
3292 api_ready (aTHX_ (SV *)hv);
3293
3294 if (GIMME_V != G_VOID)
3295 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3296 else
3297 SvREFCNT_dec (hv);
3298}
3299
3300SV *
3301rouse_cb ()
3302 PROTOTYPE:
1114 CODE: 3303 CODE:
3304 RETVAL = coro_new_rouse_cb (aTHX);
3305 OUTPUT:
3306 RETVAL
3307
3308void
3309rouse_wait (...)
3310 PROTOTYPE: ;$
3311 PPCODE:
3312 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3313
3314
3315MODULE = Coro::State PACKAGE = PerlIO::cede
3316
3317BOOT:
3318 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3319
3320
3321MODULE = Coro::State PACKAGE = Coro::Semaphore
3322
3323SV *
3324new (SV *klass, SV *count = 0)
3325 CODE:
3326 RETVAL = sv_bless (
3327 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3328 GvSTASH (CvGV (cv))
3329 );
3330 OUTPUT:
3331 RETVAL
3332
3333# helper for Coro::Channel
3334SV *
3335_alloc (int count)
3336 CODE:
3337 RETVAL = coro_waitarray_new (aTHX_ count);
3338 OUTPUT:
3339 RETVAL
3340
3341SV *
3342count (SV *self)
3343 CODE:
3344 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3345 OUTPUT:
3346 RETVAL
3347
3348void
3349up (SV *self, int adjust = 1)
3350 ALIAS:
3351 adjust = 1
3352 CODE:
3353 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3354
3355void
3356down (...)
3357 CODE:
3358 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3359
3360void
3361wait (...)
3362 CODE:
3363 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3364
3365void
3366try (SV *self)
3367 PPCODE:
3368{
3369 AV *av = (AV *)SvRV (self);
3370 SV *count_sv = AvARRAY (av)[0];
3371 IV count = SvIVX (count_sv);
3372
3373 if (count > 0)
3374 {
3375 --count;
3376 SvIVX (count_sv) = count;
3377 XSRETURN_YES;
3378 }
3379 else
3380 XSRETURN_NO;
3381}
3382
3383void
3384waiters (SV *self)
3385 PPCODE:
3386{
3387 AV *av = (AV *)SvRV (self);
3388 int wcount = AvFILLp (av) + 1 - 1;
3389
3390 if (GIMME_V == G_SCALAR)
3391 XPUSHs (sv_2mortal (newSViv (wcount)));
3392 else
3393 {
3394 int i;
3395 EXTEND (SP, wcount);
3396 for (i = 1; i <= wcount; ++i)
3397 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3398 }
3399}
3400
3401MODULE = Coro::State PACKAGE = Coro::Signal
3402
3403SV *
3404new (SV *klass)
3405 CODE:
3406 RETVAL = sv_bless (
3407 coro_waitarray_new (aTHX_ 0),
3408 GvSTASH (CvGV (cv))
3409 );
3410 OUTPUT:
3411 RETVAL
3412
3413void
3414wait (...)
3415 CODE:
3416 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3417
3418void
3419broadcast (SV *self)
3420 CODE:
3421{
3422 AV *av = (AV *)SvRV (self);
3423 coro_signal_wake (aTHX_ av, AvFILLp (av));
3424}
3425
3426void
3427send (SV *self)
3428 CODE:
3429{
3430 AV *av = (AV *)SvRV (self);
3431
3432 if (AvFILLp (av))
3433 coro_signal_wake (aTHX_ av, 1);
3434 else
3435 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3436}
3437
3438IV
3439awaited (SV *self)
3440 CODE:
3441 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3442 OUTPUT:
3443 RETVAL
3444
3445
3446MODULE = Coro::State PACKAGE = Coro::AnyEvent
3447
3448BOOT:
3449 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3450
3451void
3452_schedule (...)
3453 CODE:
3454{
3455 static int incede;
3456
1115 api_cede (); 3457 api_cede_notself (aTHX);
1116 3458
3459 ++incede;
3460 while (coro_nready >= incede && api_cede (aTHX))
3461 ;
3462
3463 sv_setsv (sv_activity, &PL_sv_undef);
3464 if (coro_nready >= incede)
3465 {
3466 PUSHMARK (SP);
3467 PUTBACK;
3468 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3469 }
3470
3471 --incede;
3472}
3473
3474
3475MODULE = Coro::State PACKAGE = Coro::AIO
3476
3477void
3478_register (char *target, char *proto, SV *req)
3479 CODE:
3480{
3481 CV *req_cv = coro_sv_2cv (aTHX_ req);
3482 /* newXSproto doesn't return the CV on 5.8 */
3483 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3484 sv_setpv ((SV *)slf_cv, proto);
3485 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3486}
3487

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