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Comparing Coro/Coro/State.xs (file contents):
Revision 1.106 by root, Mon Nov 27 02:08:55 2006 UTC vs.
Revision 1.330 by root, Wed Nov 26 09:29:06 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39 12
40#include <stdio.h> 13#include <stdio.h>
41#include <errno.h> 14#include <errno.h>
15#include <assert.h>
42 16
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
44# undef STACKGUARD 18# undef setjmp
45#endif 19# undef longjmp
46 20# undef _exit
47#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
48# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
49#endif 24#endif
50 25
51#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
52# include <unistd.h> 27# include <unistd.h>
53# include <sys/mman.h> 28# include <sys/mman.h>
… …
69#else 44#else
70# define PAGESIZE 0 45# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
72#endif 47#endif
73 48
74/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
75 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
76 * and should be unique. */ 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)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#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
77#define dSTACKLEVEL int stacklevel 131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
78#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
79 137
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT (PL_main_cv == Nullcv)
81 139
82#if __GNUC__ >= 3 140#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
84#else 144#else
85# define attribute(x) 145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
86#endif 148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
87 152
88#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
89 154
90#include "CoroAPI.h" 155#include "CoroAPI.h"
91 156#define GCoroAPI (&coroapi) /* very sneaky */
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93 157
94#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
95static perl_mutex coro_mutex; 159# if CORO_PTHREAD
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else
99# define LOCK (void)0
100# define UNLOCK (void)0
101#endif 161# endif
162#endif
102 163
164static double (*nvtime)(); /* so why doesn't it take void? */
165
166/* we hijack an hopefully unused CV flag for our purposes */
167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
169
170static U32 cctx_gen;
171static size_t cctx_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
177
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};
107 211
108/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
109typedef struct coro_cctx { 213typedef struct coro_cctx
214{
110 struct coro_cctx *next; 215 struct coro_cctx *next;
111 216
112 /* the stack */ 217 /* the stack */
113 void *sptr; 218 void *sptr;
114 long ssize; /* positive == mmap, otherwise malloc */ 219 size_t ssize;
115 220
116 /* cpu state */ 221 /* cpu state */
117 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 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 */
118 JMPENV *top_env; 224 JMPENV *top_env;
119 coro_context cctx; 225 coro_context cctx;
120 226
227 U32 gen;
121#if USE_VALGRIND 228#if CORO_USE_VALGRIND
122 int valgrind_id; 229 int valgrind_id;
123#endif 230#endif
231 unsigned char flags;
124} coro_cctx; 232} coro_cctx;
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))
125 259
126/* this is a structure representing a perl-level coroutine */ 260/* this is a structure representing a perl-level coroutine */
127struct coro { 261struct coro {
128 /* the c coroutine allocated to this perl coroutine, if any */ 262 /* the C coroutine allocated to this perl coroutine, if any */
129 coro_cctx *cctx; 263 coro_cctx *cctx;
130 264
131 /* data associated with this coroutine (initial args) */ 265 /* state data */
132 AV *args; 266 struct CoroSLF slf_frame; /* saved slf frame */
133 int refcnt;
134
135 /* optionally saved, might be zero */
136 AV *defav;
137 SV *defsv;
138 SV *errsv;
139
140 /* saved global state not related to stacks */
141 U8 dowarn;
142 I32 in_eval;
143
144 /* the stacks and related info (callchain etc..) */
145 PERL_SI *curstackinfo;
146 AV *curstack;
147 AV *mainstack; 267 AV *mainstack;
148 SV **stack_sp; 268 perl_slots *slot; /* basically the saved sp */
149 OP *op; 269
150 SV **curpad; 270 CV *startcv; /* the CV to execute */
151 AV *comppad; 271 AV *args; /* data associated with this coroutine (initial args) */
152 CV *compcv; 272 int refcnt; /* coroutines are refcounted, yes */
153 SV **stack_base; 273 int flags; /* CF_ flags */
154 SV **stack_max; 274 HV *hv; /* the perl hash associated with this coro, if any */
155 SV **tmps_stack; 275 void (*on_destroy)(pTHX_ struct coro *coro);
156 I32 tmps_floor; 276
157 I32 tmps_ix; 277 /* statistics */
158 I32 tmps_max; 278 int usecount; /* number of transfers to this coro */
159 I32 *markstack;
160 I32 *markstack_ptr;
161 I32 *markstack_max;
162 I32 *scopestack;
163 I32 scopestack_ix;
164 I32 scopestack_max;
165 ANY *savestack;
166 I32 savestack_ix;
167 I32 savestack_max;
168 OP **retstack;
169 I32 retstack_ix;
170 I32 retstack_max;
171 PMOP *curpm;
172 COP *curcop;
173 279
174 /* coro process data */ 280 /* coro process data */
175 int prio; 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;
176}; 292};
177 293
178typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
179typedef struct coro *Coro__State_or_hashref; 295typedef struct coro *Coro__State_or_hashref;
180 296
181static AV * 297/* the following variables are effectively part of the perl context */
182coro_clone_padlist (CV *cv) 298/* and get copied between struct coro and these variables */
183{ 299/* the mainr easonw e don't support windows process emulation */
184 AV *padlist = CvPADLIST (cv); 300static struct CoroSLF slf_frame; /* the current slf frame */
185 AV *newpadlist, *newpad;
186
187 newpadlist = newAV ();
188 AvREAL_off (newpadlist);
189#if PERL_VERSION_ATLEAST (5,9,0)
190 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
191#else
192 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
193#endif
194 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
195 --AvFILLp (padlist);
196
197 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
198 av_store (newpadlist, 1, (SV *)newpad);
199
200 return newpadlist;
201}
202
203static void
204free_padlist (AV *padlist)
205{
206 /* may be during global destruction */
207 if (SvREFCNT (padlist))
208 {
209 I32 i = AvFILLp (padlist);
210 while (i >= 0)
211 {
212 SV **svp = av_fetch (padlist, i--, FALSE);
213 if (svp)
214 {
215 SV *sv;
216 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
217 SvREFCNT_dec (sv);
218
219 SvREFCNT_dec (*svp);
220 }
221 }
222
223 SvREFCNT_dec ((SV*)padlist);
224 }
225}
226
227static int
228coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
229{
230 AV *padlist;
231 AV *av = (AV *)mg->mg_obj;
232
233 /* casting is fun. */
234 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
235 free_padlist (padlist);
236
237 SvREFCNT_dec (av);
238
239 return 0;
240}
241
242#define PERL_MAGIC_coro PERL_MAGIC_ext
243
244static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
245
246/* the next two functions merely cache the padlists */
247static void
248get_padlist (CV *cv)
249{
250 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
251
252 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
253 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
254 else
255 {
256#if 0
257 /* this is probably cleaner, but also slower? */
258 CV *cp = Perl_cv_clone (cv);
259 CvPADLIST (cv) = CvPADLIST (cp);
260 CvPADLIST (cp) = 0;
261 SvREFCNT_dec (cp);
262#else
263 CvPADLIST (cv) = coro_clone_padlist (cv);
264#endif
265 }
266}
267
268static void
269put_padlist (CV *cv)
270{
271 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
272
273 if (!mg)
274 {
275 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
276 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
277 mg->mg_virtual = &vtbl_coro;
278 mg->mg_obj = (SV *)newAV ();
279 }
280
281 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
282}
283
284#define SB do {
285#define SE } while (0)
286
287#define LOAD(state) load_state((state));
288#define SAVE(state,flags) save_state((state),(flags));
289
290#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
291
292static void
293load_state(Coro__State c)
294{
295 PL_dowarn = c->dowarn;
296 PL_in_eval = c->in_eval;
297
298 PL_curstackinfo = c->curstackinfo;
299 PL_curstack = c->curstack;
300 PL_mainstack = c->mainstack;
301 PL_stack_sp = c->stack_sp;
302 PL_op = c->op;
303 PL_curpad = c->curpad;
304 PL_comppad = c->comppad;
305 PL_compcv = c->compcv;
306 PL_stack_base = c->stack_base;
307 PL_stack_max = c->stack_max;
308 PL_tmps_stack = c->tmps_stack;
309 PL_tmps_floor = c->tmps_floor;
310 PL_tmps_ix = c->tmps_ix;
311 PL_tmps_max = c->tmps_max;
312 PL_markstack = c->markstack;
313 PL_markstack_ptr = c->markstack_ptr;
314 PL_markstack_max = c->markstack_max;
315 PL_scopestack = c->scopestack;
316 PL_scopestack_ix = c->scopestack_ix;
317 PL_scopestack_max = c->scopestack_max;
318 PL_savestack = c->savestack;
319 PL_savestack_ix = c->savestack_ix;
320 PL_savestack_max = c->savestack_max;
321#if !PERL_VERSION_ATLEAST (5,9,0)
322 PL_retstack = c->retstack;
323 PL_retstack_ix = c->retstack_ix;
324 PL_retstack_max = c->retstack_max;
325#endif
326 PL_curpm = c->curpm;
327 PL_curcop = c->curcop;
328
329 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
330 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
331 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
332
333 {
334 dSP;
335 CV *cv;
336
337 /* now do the ugly restore mess */
338 while ((cv = (CV *)POPs))
339 {
340 AV *padlist = (AV *)POPs;
341
342 if (padlist)
343 {
344 put_padlist (cv); /* mark this padlist as available */
345 CvPADLIST(cv) = padlist;
346 }
347
348 ++CvDEPTH(cv);
349 }
350
351 PUTBACK;
352 }
353}
354
355static void
356save_state(Coro__State c, int flags)
357{
358 {
359 dSP;
360 I32 cxix = cxstack_ix;
361 PERL_CONTEXT *ccstk = cxstack;
362 PERL_SI *top_si = PL_curstackinfo;
363
364 /*
365 * the worst thing you can imagine happens first - we have to save
366 * (and reinitialize) all cv's in the whole callchain :(
367 */
368
369 PUSHs (Nullsv);
370 /* this loop was inspired by pp_caller */
371 for (;;)
372 {
373 while (cxix >= 0)
374 {
375 PERL_CONTEXT *cx = &ccstk[cxix--];
376
377 if (CxTYPE(cx) == CXt_SUB)
378 {
379 CV *cv = cx->blk_sub.cv;
380 if (CvDEPTH(cv))
381 {
382 EXTEND (SP, CvDEPTH(cv)*2);
383
384 while (--CvDEPTH(cv))
385 {
386 /* this tells the restore code to increment CvDEPTH */
387 PUSHs (Nullsv);
388 PUSHs ((SV *)cv);
389 }
390
391 PUSHs ((SV *)CvPADLIST(cv));
392 PUSHs ((SV *)cv);
393
394 get_padlist (cv);
395 }
396 }
397#ifdef CXt_FORMAT
398 else if (CxTYPE(cx) == CXt_FORMAT)
399 {
400 /* I never used formats, so how should I know how these are implemented? */
401 /* my bold guess is as a simple, plain sub... */
402 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403 }
404#endif
405 }
406
407 if (top_si->si_type == PERLSI_MAIN)
408 break;
409
410 top_si = top_si->si_prev;
411 ccstk = top_si->si_cxstack;
412 cxix = top_si->si_cxix;
413 }
414
415 PUTBACK;
416 }
417
418 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
419 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
420 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
421
422 c->dowarn = PL_dowarn;
423 c->in_eval = PL_in_eval;
424
425 c->curstackinfo = PL_curstackinfo;
426 c->curstack = PL_curstack;
427 c->mainstack = PL_mainstack;
428 c->stack_sp = PL_stack_sp;
429 c->op = PL_op;
430 c->curpad = PL_curpad;
431 c->comppad = PL_comppad;
432 c->compcv = PL_compcv;
433 c->stack_base = PL_stack_base;
434 c->stack_max = PL_stack_max;
435 c->tmps_stack = PL_tmps_stack;
436 c->tmps_floor = PL_tmps_floor;
437 c->tmps_ix = PL_tmps_ix;
438 c->tmps_max = PL_tmps_max;
439 c->markstack = PL_markstack;
440 c->markstack_ptr = PL_markstack_ptr;
441 c->markstack_max = PL_markstack_max;
442 c->scopestack = PL_scopestack;
443 c->scopestack_ix = PL_scopestack_ix;
444 c->scopestack_max = PL_scopestack_max;
445 c->savestack = PL_savestack;
446 c->savestack_ix = PL_savestack_ix;
447 c->savestack_max = PL_savestack_max;
448#if !PERL_VERSION_ATLEAST (5,9,0)
449 c->retstack = PL_retstack;
450 c->retstack_ix = PL_retstack_ix;
451 c->retstack_max = PL_retstack_max;
452#endif
453 c->curpm = PL_curpm;
454 c->curcop = PL_curcop;
455}
456
457/*
458 * allocate various perl stacks. This is an exact copy
459 * of perl.c:init_stacks, except that it uses less memory
460 * on the (sometimes correct) assumption that coroutines do
461 * not usually need a lot of stackspace.
462 */
463static void
464coro_init_stacks ()
465{
466 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
467 PL_curstackinfo->si_type = PERLSI_MAIN;
468 PL_curstack = PL_curstackinfo->si_stack;
469 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
470
471 PL_stack_base = AvARRAY(PL_curstack);
472 PL_stack_sp = PL_stack_base;
473 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
474
475 New(50,PL_tmps_stack,96,SV*);
476 PL_tmps_floor = -1;
477 PL_tmps_ix = -1;
478 PL_tmps_max = 96;
479
480 New(54,PL_markstack,16,I32);
481 PL_markstack_ptr = PL_markstack;
482 PL_markstack_max = PL_markstack + 16;
483
484#ifdef SET_MARK_OFFSET
485 SET_MARK_OFFSET;
486#endif
487
488 New(54,PL_scopestack,16,I32);
489 PL_scopestack_ix = 0;
490 PL_scopestack_max = 16;
491
492 New(54,PL_savestack,96,ANY);
493 PL_savestack_ix = 0;
494 PL_savestack_max = 96;
495
496#if !PERL_VERSION_ATLEAST (5,9,0)
497 New(54,PL_retstack,8,OP*);
498 PL_retstack_ix = 0;
499 PL_retstack_max = 8;
500#endif
501}
502
503/*
504 * destroy the stacks, the callchain etc...
505 */
506static void
507coro_destroy_stacks ()
508{
509 if (!IN_DESTRUCT)
510 {
511 /* is this ugly, I ask? */
512 LEAVE_SCOPE (0);
513
514 /* sure it is, but more important: is it correct?? :/ */
515 FREETMPS;
516
517 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
518 }
519
520 while (PL_curstackinfo->si_next)
521 PL_curstackinfo = PL_curstackinfo->si_next;
522
523 while (PL_curstackinfo)
524 {
525 PERL_SI *p = PL_curstackinfo->si_prev;
526
527 { /*D*//*remove*/
528 dSP;
529 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
530 PUTBACK; /* possibly superfluous */
531 }
532
533 if (!IN_DESTRUCT)
534 {
535 dounwind (-1);/*D*//*remove*/
536 SvREFCNT_dec (PL_curstackinfo->si_stack);
537 }
538
539 Safefree (PL_curstackinfo->si_cxstack);
540 Safefree (PL_curstackinfo);
541 PL_curstackinfo = p;
542 }
543
544 Safefree (PL_tmps_stack);
545 Safefree (PL_markstack);
546 Safefree (PL_scopestack);
547 Safefree (PL_savestack);
548#if !PERL_VERSION_ATLEAST (5,9,0)
549 Safefree (PL_retstack);
550#endif
551}
552
553static void
554setup_coro (struct coro *coro)
555{
556 /*
557 * emulate part of the perl startup here.
558 */
559
560 coro_init_stacks ();
561
562 PL_curcop = 0;
563 PL_in_eval = 0;
564 PL_curpm = 0;
565
566 {
567 dSP;
568 LOGOP myop;
569
570 /* I have no idea why this is needed, but it is */
571 PUSHMARK (SP);
572
573 SvREFCNT_dec (GvAV (PL_defgv));
574 GvAV (PL_defgv) = coro->args; coro->args = 0;
575
576 Zero (&myop, 1, LOGOP);
577 myop.op_next = Nullop;
578 myop.op_flags = OPf_WANT_VOID;
579
580 PL_op = (OP *)&myop;
581
582 PUSHMARK (SP);
583 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
584 PUTBACK;
585 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
586 SPAGAIN;
587
588 ENTER; /* necessary e.g. for dounwind */
589 }
590}
591
592static void
593free_coro_mortal ()
594{
595 if (coro_mortal)
596 {
597 SvREFCNT_dec (coro_mortal);
598 coro_mortal = 0;
599 }
600}
601
602static void NOINLINE
603prepare_cctx (coro_cctx *cctx)
604{
605 dSP;
606 LOGOP myop;
607
608 Zero (&myop, 1, LOGOP);
609 myop.op_next = PL_op;
610 myop.op_flags = OPf_WANT_VOID;
611
612 sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
613
614 PUSHMARK (SP);
615 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
616 PUTBACK;
617 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
618 SPAGAIN;
619}
620
621static void
622coro_run (void *arg)
623{
624 /* coro_run is the alternative epilogue of transfer() */
625 UNLOCK;
626
627 /*
628 * this is a _very_ stripped down perl interpreter ;)
629 */
630 PL_top_env = &PL_start_env;
631 /* inject call to cctx_init */
632 prepare_cctx ((coro_cctx *)arg);
633
634 /* somebody will hit me for both perl_run and PL_restartop */
635 perl_run (PL_curinterp);
636
637 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
638 abort ();
639}
640
641static coro_cctx *
642cctx_new ()
643{
644 coro_cctx *cctx;
645
646 New (0, cctx, 1, coro_cctx);
647
648#if HAVE_MMAP
649
650 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
651 /* mmap suppsedly does allocate-on-write for us */
652 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
653
654 if (cctx->sptr == (void *)-1)
655 {
656 perror ("FATAL: unable to mmap stack for coroutine");
657 _exit (EXIT_FAILURE);
658 }
659
660# if STACKGUARD
661 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
662# endif
663
664#else
665
666 cctx->ssize = STACKSIZE * (long)sizeof (long);
667 New (0, cctx->sptr, STACKSIZE, long);
668
669 if (!cctx->sptr)
670 {
671 perror ("FATAL: unable to malloc stack for coroutine");
672 _exit (EXIT_FAILURE);
673 }
674
675#endif
676
677#if USE_VALGRIND
678 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
679 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
680 cctx->ssize + (char *)cctx->sptr
681 );
682#endif
683
684 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
685
686 return cctx;
687}
688
689static void
690cctx_free (coro_cctx *cctx)
691{
692 if (!cctx)
693 return;
694
695#if USE_VALGRIND
696 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
697#endif
698
699#if HAVE_MMAP
700 munmap (cctx->sptr, cctx->ssize);
701#else
702 Safefree (cctx->sptr);
703#endif
704
705 Safefree (cctx);
706}
707
708static coro_cctx *cctx_first;
709static int cctx_count, cctx_idle;
710
711static coro_cctx *
712cctx_get ()
713{
714 coro_cctx *cctx;
715
716 if (cctx_first)
717 {
718 --cctx_idle;
719 cctx = cctx_first;
720 cctx_first = cctx->next;
721 }
722 else
723 {
724 ++cctx_count;
725 cctx = cctx_new ();
726 PL_op = PL_op->op_next;
727 }
728
729 return cctx;
730}
731
732static void
733cctx_put (coro_cctx *cctx)
734{
735 ++cctx_idle;
736 cctx->next = cctx_first;
737 cctx_first = cctx;
738}
739
740/* never call directly, always through the coro_state_transfer global variable */
741static void NOINLINE
742transfer (struct coro *prev, struct coro *next, int flags)
743{
744 dSTACKLEVEL;
745
746 /* sometimes transfer is only called to set idle_sp */
747 if (flags == TRANSFER_SET_STACKLEVEL)
748 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
749 else if (prev != next)
750 {
751 coro_cctx *prev__cctx;
752
753 LOCK;
754
755 if (next->mainstack)
756 {
757 /* coroutine already started */
758 SAVE (prev, flags);
759 LOAD (next);
760 }
761 else
762 {
763 /* need to start coroutine */
764 /* first get rid of the old state */
765 SAVE (prev, -1);
766 /* setup coroutine call */
767 setup_coro (next);
768 /* need a stack */
769 next->cctx = 0;
770 }
771
772 if (!prev->cctx)
773 /* create a new empty context */
774 Newz (0, prev->cctx, 1, coro_cctx);
775
776 prev__cctx = prev->cctx;
777
778 /* possibly "free" the cctx */
779 if (prev__cctx->idle_sp == STACKLEVEL)
780 {
781 cctx_put (prev__cctx);
782 prev->cctx = 0;
783 }
784
785 if (!next->cctx)
786 next->cctx = cctx_get ();
787
788 if (prev__cctx != next->cctx)
789 {
790 prev__cctx->top_env = PL_top_env;
791 PL_top_env = next->cctx->top_env;
792 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
793 }
794
795 free_coro_mortal ();
796
797 UNLOCK;
798 }
799}
800
801struct transfer_args
802{
803 struct coro *prev, *next;
804 int flags;
805};
806
807#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
808
809static void
810coro_state_destroy (struct coro *coro)
811{
812 if (coro->refcnt--)
813 return;
814
815 if (coro->mainstack && coro->mainstack != main_mainstack)
816 {
817 struct coro temp;
818
819 SAVE ((&temp), TRANSFER_SAVE_ALL);
820 LOAD (coro);
821
822 coro_destroy_stacks ();
823
824 LOAD ((&temp)); /* this will get rid of defsv etc.. */
825
826 coro->mainstack = 0;
827 }
828
829 cctx_free (coro->cctx);
830 SvREFCNT_dec (coro->args);
831 Safefree (coro);
832}
833
834static int
835coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
836{
837 struct coro *coro = (struct coro *)mg->mg_ptr;
838 mg->mg_ptr = 0;
839
840 coro_state_destroy (coro);
841
842 return 0;
843}
844
845static int
846coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
847{
848 struct coro *coro = (struct coro *)mg->mg_ptr;
849
850 ++coro->refcnt;
851
852 return 0;
853}
854
855static MGVTBL coro_state_vtbl = {
856 0, 0, 0, 0,
857 coro_state_clear,
858 0,
859#ifdef MGf_DUP
860 coro_state_dup,
861#else
862# define MGf_DUP 0
863#endif
864};
865
866static struct coro *
867SvSTATE (SV *coro)
868{
869 HV *stash;
870 MAGIC *mg;
871
872 if (SvROK (coro))
873 coro = SvRV (coro);
874
875 stash = SvSTASH (coro);
876 if (stash != coro_stash && stash != coro_state_stash)
877 {
878 /* very slow, but rare, check */
879 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
880 croak ("Coro::State object required");
881 }
882
883 mg = SvMAGIC (coro);
884 assert (mg->mg_type == PERL_MAGIC_ext);
885 return (struct coro *)mg->mg_ptr;
886}
887
888static void
889prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
890{
891 ta->prev = SvSTATE (prev);
892 ta->next = SvSTATE (next);
893 ta->flags = flags;
894}
895
896static void
897api_transfer (SV *prev, SV *next, int flags)
898{
899 dTHX;
900 struct transfer_args ta;
901
902 prepare_transfer (&ta, prev, next, flags);
903 TRANSFER (ta);
904}
905 301
906/** Coro ********************************************************************/ 302/** Coro ********************************************************************/
907 303
908#define PRIO_MAX 3 304#define PRIO_MAX 3
909#define PRIO_HIGH 1 305#define PRIO_HIGH 1
… …
911#define PRIO_LOW -1 307#define PRIO_LOW -1
912#define PRIO_IDLE -3 308#define PRIO_IDLE -3
913#define PRIO_MIN -4 309#define PRIO_MIN -4
914 310
915/* for Coro.pm */ 311/* for Coro.pm */
916static GV *coro_current, *coro_idle; 312static SV *coro_current;
313static SV *coro_readyhook;
917static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
918static int coro_nready; 315static CV *cv_coro_run, *cv_coro_terminate;
316static struct coro *coro_first;
317#define coro_nready coroapi.nready
919 318
920static void 319/** lowlevel stuff **********************************************************/
921coro_enq (SV *sv)
922{
923 int prio;
924
925 if (SvTYPE (sv) != SVt_PVHV)
926 croak ("Coro::ready tried to enqueue something that is not a coroutine");
927
928 prio = SvSTATE (sv)->prio;
929
930 av_push (coro_ready [prio - PRIO_MIN], sv);
931 coro_nready++;
932}
933 320
934static SV * 321static SV *
935coro_deq (int min_prio) 322coro_get_sv (pTHX_ const char *name, int create)
936{ 323{
937 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}
938 330
939 min_prio -= PRIO_MIN; 331static AV *
940 if (min_prio < 0) 332coro_get_av (pTHX_ const char *name, int create)
941 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}
942 340
943 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 341static HV *
944 if (AvFILLp (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)
945 { 390 {
946 coro_nready--; 391 SV **svp = AvARRAY (padlist)[i--];
947 return av_shift (coro_ready [prio]); 392 if (svp)
393 {
394 AvREAL_on (*svp);
395 av_undef (*svp);
396 SvREFCNT_dec (*svp);
397 }
948 } 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 */
949 415
950 return 0; 416 return 0;
951} 417}
952 418
953static void 419#define CORO_MAGIC_type_cv 26
954api_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)
955{ 442{
956 dTHX; 443 HV *stash;
444 MAGIC *mg;
957 445
958 if (SvROK (coro)) 446 if (SvROK (coro))
959 coro = SvRV (coro); 447 coro = SvRV (coro);
960 448
961 LOCK; 449 if (expect_false (SvTYPE (coro) != SVt_PVHV))
962 coro_enq (SvREFCNT_inc (coro)); 450 croak ("Coro::State object required");
963 UNLOCK;
964}
965 451
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 */
966static void 768static int
769coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
770{
771 const char *s = MgPV_nolen_const (mg);
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{
1641 SV *prev_sv = SvRV (coro_current);
1642
1643 ta->prev = SvSTATE_hv (prev_sv);
1644 ta->next = next;
1645
1646 TRANSFER_CHECK (*ta);
1647
1648 SvRV_set (coro_current, (SV *)next->hv);
1649
1650 free_coro_mortal (aTHX);
1651 coro_mortal = prev_sv;
1652}
1653
1654static void
967prepare_schedule (struct transfer_args *ta) 1655prepare_schedule (pTHX_ struct coro_transfer_args *ta)
968{ 1656{
969 SV *current, *prev, *next;
970
971 current = GvSV (coro_current);
972
973 for (;;) 1657 for (;;)
974 { 1658 {
975 LOCK; 1659 SV *next_sv = coro_deq (aTHX);
976 next = coro_deq (PRIO_MIN);
977 UNLOCK;
978 1660
979 if (next) 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);
980 break; 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
1727api_schedule (pTHX)
1728{
1729 struct coro_transfer_args ta;
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);
981 1874
982 { 1875 {
983 dSP; 1876 dSP;
984 1877 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
985 ENTER;
986 SAVETMPS;
987
988 PUSHMARK (SP);
989 PUTBACK; 1878 PUTBACK;
990 call_sv (GvSV (coro_idle), G_DISCARD);
991
992 FREETMPS;
993 LEAVE;
994 } 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))
995 } 1896 {
1897 /* subsequent iteration */
1898 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1899 coro->saved_deffh = 0;
996 1900
997 prev = SvRV (current); 1901 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
998 SvRV (current) = next; 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 ();
999 1906
1000 /* free this only after the transfer */ 1907 frame->prepare = prepare_nop;
1001 LOCK; 1908 }
1002 free_coro_mortal (); 1909 else
1003 UNLOCK; 1910 {
1004 coro_mortal = prev; 1911 av_clear (GvAV (PL_defgv));
1912 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1005 1913
1006 ta->prev = SvSTATE (prev); 1914 coro->prio = 0;
1007 ta->next = SvSTATE (next);
1008 ta->flags = TRANSFER_SAVE_ALL;
1009}
1010 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
1011static void 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
1012prepare_cede (struct transfer_args *ta) 2100slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1013{ 2101{
1014 LOCK; 2102 struct coro *next = (struct coro *)slf_frame.data;
1015 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1016 UNLOCK;
1017 2103
2104 SvREFCNT_inc_NN (next->hv);
1018 prepare_schedule (ta); 2105 prepare_schedule_to (aTHX_ ta, next);
1019} 2106}
1020 2107
1021static void 2108static void
1022api_schedule (void) 2109slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1023{ 2110{
1024 dTHX; 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 {
1025 struct transfer_args ta; 2194 struct coro_transfer_args ta;
1026 2195
1027 prepare_schedule (&ta); 2196 slf_frame.prepare (aTHX_ &ta);
1028 TRANSFER (ta); 2197 TRANSFER (ta, 0);
1029}
1030 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
1031static void 2433static int
1032api_cede (void) 2434slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1033{ 2435{
1034 dTHX; 2436 AV *av = (AV *)frame->data;
1035 struct transfer_args ta; 2437 SV *count_sv = AvARRAY (av)[0];
1036 2438
1037 prepare_cede (&ta); 2439 /* if we are about to throw, don't actually acquire the lock, just throw */
1038 TRANSFER (ta); 2440 if (CORO_THROW)
1039} 2441 return 0;
2442 else if (SvIVX (count_sv) > 0)
2443 {
2444 SvSTATE_current->on_destroy = 0;
1040 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
1041MODULE = Coro::State PACKAGE = Coro::State 2763MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1042 2764
1043PROTOTYPES: DISABLE 2765PROTOTYPES: DISABLE
1044 2766
1045BOOT: 2767BOOT:
1046{ 2768{
1047#ifdef USE_ITHREADS 2769#ifdef USE_ITHREADS
1048 MUTEX_INIT (&coro_mutex); 2770# if CORO_PTHREAD
2771 coro_thx = PERL_GET_CONTEXT;
2772# endif
1049#endif 2773#endif
1050 BOOT_PAGESIZE; 2774 BOOT_PAGESIZE;
1051 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
1052 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2789 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1053 2790
1054 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2791 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1055 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2792 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1056 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2793 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2794 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1057 2795
1058 main_mainstack = PL_mainstack; 2796 main_mainstack = PL_mainstack;
2797 main_top_env = PL_top_env;
1059 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
1060 coroapi.ver = CORO_API_VERSION; 2812 coroapi.ver = CORO_API_VERSION;
2813 coroapi.rev = CORO_API_REVISION;
2814
1061 coroapi.transfer = api_transfer; 2815 coroapi.transfer = api_transfer;
2816
2817 coroapi.sv_state = SvSTATE_;
2818 coroapi.execute_slf = api_execute_slf;
2819 coroapi.prepare_nop = prepare_nop;
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 }
1062 2832
1063 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2833 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1064} 2834}
1065 2835
1066SV * 2836SV *
1067new (char *klass, ...) 2837new (char *klass, ...)
2838 ALIAS:
2839 Coro::new = 1
1068 CODE: 2840 CODE:
1069{ 2841{
1070 struct coro *coro; 2842 struct coro *coro;
2843 MAGIC *mg;
1071 HV *hv; 2844 HV *hv;
2845 CV *cb;
1072 int i; 2846 int i;
1073 2847
2848 if (items > 1)
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
1074 Newz (0, coro, 1, struct coro); 2862 Newz (0, coro, 1, struct coro);
1075 coro->args = newAV (); 2863 coro->args = newAV ();
2864 coro->flags = CF_NEW;
1076 2865
2866 if (coro_first) coro_first->prev = coro;
2867 coro->next = coro_first;
2868 coro_first = coro;
2869
1077 hv = newHV (); 2870 coro->hv = hv = newHV ();
1078 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2871 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2872 mg->mg_flags |= MGf_DUP;
1079 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2873 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1080 2874
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
1081 for (i = 1; i < items; i++) 2887 for (i = 2; i < items; i++)
1082 av_push (coro->args, newSVsv (ST (i))); 2888 av_push (coro->args, newSVsv (ST (i)));
2889 }
1083} 2890}
1084 OUTPUT: 2891 OUTPUT:
1085 RETVAL 2892 RETVAL
1086 2893
1087void 2894void
1088_set_stacklevel (...) 2895transfer (...)
1089 ALIAS: 2896 PROTOTYPE: $$
1090 Coro::State::transfer = 1 2897 CODE:
1091 Coro::schedule = 2 2898 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1092 Coro::cede = 3
1093 Coro::Cont::yield = 4
1094 CODE:
1095{
1096 struct transfer_args ta;
1097 2899
1098 switch (ix) 2900bool
1099 { 2901_destroy (SV *coro_sv)
1100 case 0: 2902 CODE:
1101 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2903 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1102 ta.next = 0; 2904 OUTPUT:
1103 ta.flags = TRANSFER_SET_STACKLEVEL; 2905 RETVAL
1104 break;
1105
1106 case 1:
1107 if (items != 3)
1108 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1109
1110 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1111 break;
1112
1113 case 2:
1114 prepare_schedule (&ta);
1115 break;
1116
1117 case 3:
1118 prepare_cede (&ta);
1119 break;
1120
1121 case 4:
1122 {
1123 SV *yieldstack;
1124 SV *sv;
1125 AV *defav = GvAV (PL_defgv);
1126
1127 yieldstack = *hv_fetch (
1128 (HV *)SvRV (GvSV (coro_current)),
1129 "yieldstack", sizeof ("yieldstack") - 1,
1130 0
1131 );
1132
1133 /* set up @_ -- ugly */
1134 av_clear (defav);
1135 av_fill (defav, items - 1);
1136 while (items--)
1137 av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139 sv = av_pop ((AV *)SvRV (yieldstack));
1140 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142 ta.flags = 0;
1143 SvREFCNT_dec (sv);
1144 }
1145 break;
1146
1147 }
1148
1149 TRANSFER (ta);
1150}
1151 2906
1152void 2907void
1153_clone_state_from (SV *dst, SV *src)
1154 CODE:
1155{
1156 struct coro *coro_src = SvSTATE (src);
1157
1158 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160 ++coro_src->refcnt;
1161 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162}
1163
1164void
1165_exit (code) 2908_exit (int code)
1166 int code
1167 PROTOTYPE: $ 2909 PROTOTYPE: $
1168 CODE: 2910 CODE:
1169 _exit (code); 2911 _exit (code);
1170 2912
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
1171int 2955int
1172cctx_count () 2956cctx_count ()
2957 PROTOTYPE:
1173 CODE: 2958 CODE:
1174 RETVAL = cctx_count; 2959 RETVAL = cctx_count;
1175 OUTPUT: 2960 OUTPUT:
1176 RETVAL 2961 RETVAL
1177 2962
1178int 2963int
1179cctx_idle () 2964cctx_idle ()
2965 PROTOTYPE:
1180 CODE: 2966 CODE:
1181 RETVAL = cctx_idle; 2967 RETVAL = cctx_idle;
1182 OUTPUT: 2968 OUTPUT:
1183 RETVAL 2969 RETVAL
1184 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))
2989 {
2990 struct coro temp;
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;
3003 PUTBACK;
3004 PUSHSTACK;
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;
3013 SPAGAIN;
3014 FREETMPS;
3015 LEAVE;
3016 PUTBACK;
3017 }
3018
3019 if (!(coro->flags & CF_RUNNING))
3020 {
3021 save_perl (aTHX_ coro);
3022 load_perl (aTHX_ &temp);
3023 SPAGAIN;
3024 }
3025 }
3026}
3027
3028SV *
3029is_ready (Coro::State 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
3040
3041void
3042throw (Coro::State self, SV *throw = &PL_sv_undef)
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)
3059 PROTOTYPE: $
3060 CODE:
3061 /* maybe manage the running flag differently */
3062 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3063 OUTPUT:
3064 RETVAL
3065
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
3073
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
3087
3088void
3089force_cctx ()
3090 PROTOTYPE:
3091 CODE:
3092 cctx_current->idle_sp = 0;
3093
3094void
3095swap_defsv (Coro::State self)
3096 PROTOTYPE: $
3097 ALIAS:
3098 swap_defav = 1
3099 CODE:
3100 if (!self->slot)
3101 croak ("cannot swap state with coroutine that has no saved state,");
3102 else
3103 {
3104 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3105 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3106
3107 SV *tmp = *src; *src = *dst; *dst = tmp;
3108 }
3109
3110
1185MODULE = Coro::State PACKAGE = Coro 3111MODULE = Coro::State PACKAGE = Coro
1186 3112
1187BOOT: 3113BOOT:
1188{ 3114{
1189 int i; 3115 int i;
1190 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
1191 coro_stash = gv_stashpv ("Coro", TRUE); 3132 coro_stash = gv_stashpv ("Coro", TRUE);
1192 3133
1193 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3134 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1194 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3135 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1195 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3136 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1196 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3137 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1197 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3138 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1198 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3139 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1199 3140
1200 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1201 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1202
1203 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3141 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1204 coro_ready[i] = newAV (); 3142 coro_ready[i] = newAV ();
1205 3143
1206 { 3144 {
1207 SV *sv = perl_get_sv("Coro::API", 1); 3145 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1208 3146
1209 coroapi.schedule = api_schedule; 3147 coroapi.schedule = api_schedule;
3148 coroapi.schedule_to = api_schedule_to;
1210 coroapi.cede = api_cede; 3149 coroapi.cede = api_cede;
3150 coroapi.cede_notself = api_cede_notself;
1211 coroapi.ready = api_ready; 3151 coroapi.ready = api_ready;
3152 coroapi.is_ready = api_is_ready;
1212 coroapi.nready = &coro_nready; 3153 coroapi.nready = coro_nready;
1213 coroapi.current = coro_current; 3154 coroapi.current = coro_current;
1214 3155
1215 GCoroAPI = &coroapi; 3156 /*GCoroAPI = &coroapi;*/
1216 sv_setiv (sv, (IV)&coroapi); 3157 sv_setiv (sv, (IV)&coroapi);
1217 SvREADONLY_on (sv); 3158 SvREADONLY_on (sv);
1218 } 3159 }
1219} 3160}
1220 3161
3162void
3163terminate (...)
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)
3200 PROTOTYPE: $
3201 CODE:
3202 SvREFCNT_dec (SvRV (coro_current));
3203 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3204
3205void
3206_set_readyhook (SV *hook)
3207 PROTOTYPE: $
3208 CODE:
3209 SvREFCNT_dec (coro_readyhook);
3210 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3211
1221int 3212int
1222prio (Coro::State coro, int newprio = 0) 3213prio (Coro::State coro, int newprio = 0)
3214 PROTOTYPE: $;$
1223 ALIAS: 3215 ALIAS:
1224 nice = 1 3216 nice = 1
1225 CODE: 3217 CODE:
1226{ 3218{
1227 RETVAL = coro->prio; 3219 RETVAL = coro->prio;
1228 3220
1229 if (items > 1) 3221 if (items > 1)
1230 { 3222 {
1231 if (ix) 3223 if (ix)
1232 newprio += coro->prio; 3224 newprio = coro->prio - newprio;
1233 3225
1234 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3226 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1235 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3227 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1236 3228
1237 coro->prio = newprio; 3229 coro->prio = newprio;
1238 } 3230 }
1239} 3231}
3232 OUTPUT:
3233 RETVAL
1240 3234
1241void 3235SV *
1242ready (SV *self) 3236ready (SV *self)
1243 PROTOTYPE: $ 3237 PROTOTYPE: $
1244 CODE: 3238 CODE:
1245 api_ready (self); 3239 RETVAL = boolSV (api_ready (aTHX_ self));
3240 OUTPUT:
3241 RETVAL
1246 3242
1247int 3243int
1248nready (...) 3244nready (...)
1249 PROTOTYPE: 3245 PROTOTYPE:
1250 CODE: 3246 CODE:
1251 RETVAL = coro_nready; 3247 RETVAL = coro_nready;
1252 OUTPUT: 3248 OUTPUT:
1253 RETVAL 3249 RETVAL
1254 3250
1255MODULE = Coro::State PACKAGE = Coro::AIO 3251void
3252_pool_handler (...)
3253 CODE:
3254 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3255
3256void
3257async_pool (SV *cv, ...)
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}
1256 3299
1257SV * 3300SV *
1258_get_state () 3301rouse_cb ()
3302 PROTOTYPE:
1259 CODE: 3303 CODE:
1260{ 3304 RETVAL = coro_new_rouse_cb (aTHX);
1261 struct {
1262 int errorno;
1263 int laststype;
1264 int laststatval;
1265 Stat_t statcache;
1266 } data;
1267
1268 data.errorno = errno;
1269 data.laststype = PL_laststype;
1270 data.laststatval = PL_laststatval;
1271 data.statcache = PL_statcache;
1272
1273 RETVAL = newSVpvn ((char *)&data, sizeof data);
1274}
1275 OUTPUT: 3305 OUTPUT:
1276 RETVAL 3306 RETVAL
1277 3307
1278void 3308void
1279_set_state (char *data_) 3309rouse_wait (...)
1280 PROTOTYPE: $ 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)
1281 CODE: 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:
1282{ 3368{
1283 struct { 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 {
1284 int errorno; 3394 int i;
1285 int laststype; 3395 EXTEND (SP, wcount);
1286 int laststatval; 3396 for (i = 1; i <= wcount; ++i)
1287 Stat_t statcache; 3397 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1288 } *data = (void *)data_; 3398 }
1289
1290 errno = data->errorno;
1291 PL_laststype = data->laststype;
1292 PL_laststatval = data->laststatval;
1293 PL_statcache = data->statcache;
1294} 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
3457 api_cede_notself (aTHX);
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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