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Comparing Coro/Coro/State.xs (file contents):
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC vs.
Revision 1.329 by root, Tue Nov 25 20:48:41 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 12
9#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
10# ifndef PL_ppaddr 63# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
12# endif 65# endif
13# ifndef call_sv 66# ifndef call_sv
14# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
25# ifndef IS_PADCONST 78# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
27# endif 80# endif
28#endif 81#endif
29 82
30#include <stdio.h> 83/* 5.11 */
31#include <errno.h> 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
32 114
33#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
34# undef STACKGUARD 116# undef CORO_STACKGUARD
35#endif 117#endif
36 118
37#ifndef STACKGUARD 119#ifndef CORO_STACKGUARD
38# define STACKGUARD 0 120# define CORO_STACKGUARD 0
39#endif
40
41#ifdef HAVE_MMAP
42# include <unistd.h>
43# include <sys/mman.h>
44# ifndef MAP_ANONYMOUS
45# ifdef MAP_ANON
46# define MAP_ANONYMOUS MAP_ANON
47# else
48# undef HAVE_MMAP
49# endif 121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
135# define STACKLEVEL ((void *)&stacklevel)
136#endif
137
138#define IN_DESTRUCT (PL_main_cv == Nullcv)
139
140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
154
155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
50# endif 161# endif
51# include <limits.h>
52# ifndef PAGESIZE
53# define PAGESIZE pagesize
54# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55static long pagesize;
56# else
57# define BOOT_PAGESIZE
58# endif 162#endif
59#endif
60 163
61/* The next macro should declare a variable stacklevel that contains and approximation 164static double (*nvtime)(); /* so why doesn't it take void? */
62 * to the current C stack pointer. Its property is that it changes with each call
63 * and should be unique. */
64#define dSTACKLEVEL int stacklevel
65#define STACKLEVEL ((void *)&stacklevel)
66 165
67#define IN_DESTRUCT (PL_main_cv == Nullcv) 166/* we hijack an hopefully unused CV flag for our purposes */
167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
68 169
69#include "CoroAPI.h" 170static U32 cctx_gen;
70 171static size_t cctx_stacksize = CORO_STACKSIZE;
71#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72
73#ifdef USE_ITHREADS
74static perl_mutex coro_mutex;
75# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77#else
78# define LOCK (void)0
79# define UNLOCK (void)0
80#endif
81
82static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
83static 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;
84static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
85static 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};
86 211
87/* this is a structure representing a c-level coroutine */ 212/* this is a structure representing a c-level coroutine */
88typedef struct coro_stack { 213typedef struct coro_cctx
214{
89 struct coro_stack *next; 215 struct coro_cctx *next;
90 216
91 /* the stack */ 217 /* the stack */
92 void *sptr; 218 void *sptr;
93 long ssize; /* positive == mmap, otherwise malloc */ 219 size_t ssize;
94 220
95 /* cpu state */ 221 /* cpu state */
96 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 */
97 JMPENV *top_env; 224 JMPENV *top_env;
98 coro_context cctx; 225 coro_context cctx;
99} coro_stack; 226
227 U32 gen;
228#if CORO_USE_VALGRIND
229 int valgrind_id;
230#endif
231 unsigned char flags;
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))
100 259
101/* this is a structure representing a perl-level coroutine */ 260/* this is a structure representing a perl-level coroutine */
102struct coro { 261struct coro {
103 /* the c coroutine allocated to this perl coroutine, if any */ 262 /* the C coroutine allocated to this perl coroutine, if any */
104 coro_stack *stack; 263 coro_cctx *cctx;
105 264
106 /* data associated with this coroutine (initial args) */ 265 /* state data */
107 AV *args; 266 struct CoroSLF slf_frame; /* saved slf frame */
108 int refcnt;
109
110 /* optionally saved, might be zero */
111 AV *defav;
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118
119 /* the stacks and related info (callchain etc..) */
120 PERL_SI *curstackinfo;
121 AV *curstack;
122 AV *mainstack; 267 AV *mainstack;
123 SV **stack_sp; 268 perl_slots *slot; /* basically the saved sp */
124 OP *op; 269
125 SV **curpad; 270 CV *startcv; /* the CV to execute */
126 AV *comppad; 271 AV *args; /* data associated with this coroutine (initial args) */
127 CV *compcv; 272 int refcnt; /* coroutines are refcounted, yes */
128 SV **stack_base; 273 int flags; /* CF_ flags */
129 SV **stack_max; 274 HV *hv; /* the perl hash associated with this coro, if any */
130 SV **tmps_stack; 275 void (*on_destroy)(pTHX_ struct coro *coro);
131 I32 tmps_floor; 276
132 I32 tmps_ix; 277 /* statistics */
133 I32 tmps_max; 278 int usecount; /* number of transfers to this coro */
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 279
149 /* coro process data */ 280 /* coro process data */
150 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;
151}; 292};
152 293
153typedef struct coro *Coro__State; 294typedef struct coro *Coro__State;
154typedef struct coro *Coro__State_or_hashref; 295typedef struct coro *Coro__State_or_hashref;
155 296
297/* the following variables are effectively part of the perl context */
298/* and get copied between struct coro and these variables */
299/* the mainr easonw e don't support windows process emulation */
300static struct CoroSLF slf_frame; /* the current slf frame */
301
302/** Coro ********************************************************************/
303
304#define PRIO_MAX 3
305#define PRIO_HIGH 1
306#define PRIO_NORMAL 0
307#define PRIO_LOW -1
308#define PRIO_IDLE -3
309#define PRIO_MIN -4
310
311/* for Coro.pm */
312static SV *coro_current;
313static SV *coro_readyhook;
314static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
315static CV *cv_coro_run, *cv_coro_terminate;
316static struct coro *coro_first;
317#define coro_nready coroapi.nready
318
319/** lowlevel stuff **********************************************************/
320
321static SV *
322coro_get_sv (pTHX_ const char *name, int create)
323{
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}
330
156static AV * 331static AV *
332coro_get_av (pTHX_ const char *name, int create)
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}
340
341static HV *
342coro_get_hv (pTHX_ const char *name, int create)
343{
344#if PERL_VERSION_ATLEAST (5,10,0)
345 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
346 get_hv (name, create);
347#endif
348 return get_hv (name, create);
349}
350
351/* may croak */
352INLINE CV *
353coro_sv_2cv (pTHX_ SV *sv)
354{
355 HV *st;
356 GV *gvp;
357 return sv_2cv (sv, &st, &gvp, 0);
358}
359
360static AV *
157coro_clone_padlist (CV *cv) 361coro_derive_padlist (pTHX_ CV *cv)
158{ 362{
159 AV *padlist = CvPADLIST (cv); 363 AV *padlist = CvPADLIST (cv);
160 AV *newpadlist, *newpad; 364 AV *newpadlist, *newpad;
161 365
162 newpadlist = newAV (); 366 newpadlist = newAV ();
163 AvREAL_off (newpadlist); 367 AvREAL_off (newpadlist);
164#if PERL_VERSION < 9 368#if PERL_VERSION_ATLEAST (5,10,0)
369 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
370#else
165 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 371 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168#endif 372#endif
169 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 373 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170 --AvFILLp (padlist); 374 --AvFILLp (padlist);
171 375
172 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 376 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
173 av_store (newpadlist, 1, (SV *)newpad); 377 av_store (newpadlist, 1, (SV *)newpad);
174 378
175 return newpadlist; 379 return newpadlist;
176} 380}
177 381
178static void 382static void
179free_padlist (AV *padlist) 383free_padlist (pTHX_ AV *padlist)
180{ 384{
181 /* may be during global destruction */ 385 /* may be during global destruction */
182 if (SvREFCNT (padlist)) 386 if (SvREFCNT (padlist))
183 { 387 {
184 I32 i = AvFILLp (padlist); 388 I32 i = AvFILLp (padlist);
… …
205 AV *padlist; 409 AV *padlist;
206 AV *av = (AV *)mg->mg_obj; 410 AV *av = (AV *)mg->mg_obj;
207 411
208 /* casting is fun. */ 412 /* casting is fun. */
209 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 413 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210 free_padlist (padlist); 414 free_padlist (aTHX_ padlist);
211 415
212 SvREFCNT_dec (av); 416 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
213 417
214 return 0; 418 return 0;
215} 419}
216 420
421#define CORO_MAGIC_type_cv 26
217#define PERL_MAGIC_coro PERL_MAGIC_ext 422#define CORO_MAGIC_type_state PERL_MAGIC_ext
218 423
219static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 424static MGVTBL coro_cv_vtbl = {
425 0, 0, 0, 0,
426 coro_cv_free
427};
428
429#define CORO_MAGIC_NN(sv, type) \
430 (expect_true (SvMAGIC (sv)->mg_type == type) \
431 ? SvMAGIC (sv) \
432 : mg_find (sv, type))
433
434#define CORO_MAGIC(sv, type) \
435 (expect_true (SvMAGIC (sv)) \
436 ? CORO_MAGIC_NN (sv, type) \
437 : 0)
438
439#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
440#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
441
442INLINE struct coro *
443SvSTATE_ (pTHX_ SV *coro)
444{
445 HV *stash;
446 MAGIC *mg;
447
448 if (SvROK (coro))
449 coro = SvRV (coro);
450
451 if (expect_false (SvTYPE (coro) != SVt_PVHV))
452 croak ("Coro::State object required");
453
454 stash = SvSTASH (coro);
455 if (expect_false (stash != coro_stash && stash != coro_state_stash))
456 {
457 /* very slow, but rare, check */
458 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
459 croak ("Coro::State object required");
460 }
461
462 mg = CORO_MAGIC_state (coro);
463 return (struct coro *)mg->mg_ptr;
464}
465
466#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
467
468/* faster than SvSTATE, but expects a coroutine hv */
469#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
470#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
220 471
221/* the next two functions merely cache the padlists */ 472/* the next two functions merely cache the padlists */
222static void 473static void
223get_padlist (CV *cv) 474get_padlist (pTHX_ CV *cv)
224{ 475{
225 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 476 MAGIC *mg = CORO_MAGIC_cv (cv);
477 AV *av;
226 478
227 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 479 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
228 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 480 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229 else 481 else
230 { 482 {
231#if 0 483#if CORO_PREFER_PERL_FUNCTIONS
232 /* this is probably cleaner, but also slower? */ 484 /* this is probably cleaner? but also slower! */
485 /* in practise, it seems to be less stable */
233 CV *cp = Perl_cv_clone (cv); 486 CV *cp = Perl_cv_clone (aTHX_ cv);
234 CvPADLIST (cv) = CvPADLIST (cp); 487 CvPADLIST (cv) = CvPADLIST (cp);
235 CvPADLIST (cp) = 0; 488 CvPADLIST (cp) = 0;
236 SvREFCNT_dec (cp); 489 SvREFCNT_dec (cp);
237#else 490#else
238 CvPADLIST (cv) = coro_clone_padlist (cv); 491 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
239#endif 492#endif
240 } 493 }
241} 494}
242 495
243static void 496static void
244put_padlist (CV *cv) 497put_padlist (pTHX_ CV *cv)
245{ 498{
246 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 499 MAGIC *mg = CORO_MAGIC_cv (cv);
500 AV *av;
247 501
248 if (!mg) 502 if (expect_false (!mg))
249 { 503 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
250 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252 mg->mg_virtual = &vtbl_coro;
253 mg->mg_obj = (SV *)newAV ();
254 }
255 504
256 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 505 av = (AV *)mg->mg_obj;
257}
258 506
259#define SB do { 507 if (expect_false (AvFILLp (av) >= AvMAX (av)))
260#define SE } while (0) 508 av_extend (av, AvMAX (av) + 1);
261 509
262#define LOAD(state) load_state((state)); 510 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263#define SAVE(state,flags) save_state((state),(flags)); 511}
264 512
265#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 513/** load & save, init *******************************************************/
266 514
267static void 515static void
268load_state(Coro__State c) 516load_perl (pTHX_ Coro__State c)
269{ 517{
270 PL_dowarn = c->dowarn; 518 perl_slots *slot = c->slot;
271 PL_in_eval = c->in_eval; 519 c->slot = 0;
272 520
273 PL_curstackinfo = c->curstackinfo;
274 PL_curstack = c->curstack;
275 PL_mainstack = c->mainstack; 521 PL_mainstack = c->mainstack;
276 PL_stack_sp = c->stack_sp;
277 PL_op = c->op;
278 PL_curpad = c->curpad;
279 PL_comppad = c->comppad;
280 PL_compcv = c->compcv;
281 PL_stack_base = c->stack_base;
282 PL_stack_max = c->stack_max;
283 PL_tmps_stack = c->tmps_stack;
284 PL_tmps_floor = c->tmps_floor;
285 PL_tmps_ix = c->tmps_ix;
286 PL_tmps_max = c->tmps_max;
287 PL_markstack = c->markstack;
288 PL_markstack_ptr = c->markstack_ptr;
289 PL_markstack_max = c->markstack_max;
290 PL_scopestack = c->scopestack;
291 PL_scopestack_ix = c->scopestack_ix;
292 PL_scopestack_max = c->scopestack_max;
293 PL_savestack = c->savestack;
294 PL_savestack_ix = c->savestack_ix;
295 PL_savestack_max = c->savestack_max;
296#if PERL_VERSION < 9
297 PL_retstack = c->retstack;
298 PL_retstack_ix = c->retstack_ix;
299 PL_retstack_max = c->retstack_max;
300#endif
301 PL_curpm = c->curpm;
302 PL_curcop = c->curcop;
303 522
304 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 523 GvSV (PL_defgv) = slot->defsv;
305 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 524 GvAV (PL_defgv) = slot->defav;
306 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 525 GvSV (PL_errgv) = slot->errsv;
526 GvSV (irsgv) = slot->irsgv;
527 GvHV (PL_hintgv) = slot->hinthv;
528
529 #define VAR(name,type) PL_ ## name = slot->name;
530 # include "state.h"
531 #undef VAR
307 532
308 { 533 {
309 dSP; 534 dSP;
535
310 CV *cv; 536 CV *cv;
311 537
312 /* now do the ugly restore mess */ 538 /* now do the ugly restore mess */
313 while ((cv = (CV *)POPs)) 539 while (expect_true (cv = (CV *)POPs))
314 { 540 {
315 AV *padlist = (AV *)POPs;
316
317 if (padlist)
318 {
319 put_padlist (cv); /* mark this padlist as available */ 541 put_padlist (aTHX_ cv); /* mark this padlist as available */
320 CvPADLIST(cv) = padlist; 542 CvDEPTH (cv) = PTR2IV (POPs);
321 } 543 CvPADLIST (cv) = (AV *)POPs;
322
323 ++CvDEPTH(cv);
324 } 544 }
325 545
326 PUTBACK; 546 PUTBACK;
327 } 547 }
328}
329 548
549 slf_frame = c->slf_frame;
550 CORO_THROW = c->except;
551}
552
330static void 553static void
331save_state(Coro__State c, int flags) 554save_perl (pTHX_ Coro__State c)
332{ 555{
556 c->except = CORO_THROW;
557 c->slf_frame = slf_frame;
558
333 { 559 {
334 dSP; 560 dSP;
335 I32 cxix = cxstack_ix; 561 I32 cxix = cxstack_ix;
336 PERL_CONTEXT *ccstk = cxstack; 562 PERL_CONTEXT *ccstk = cxstack;
337 PERL_SI *top_si = PL_curstackinfo; 563 PERL_SI *top_si = PL_curstackinfo;
… …
339 /* 565 /*
340 * the worst thing you can imagine happens first - we have to save 566 * the worst thing you can imagine happens first - we have to save
341 * (and reinitialize) all cv's in the whole callchain :( 567 * (and reinitialize) all cv's in the whole callchain :(
342 */ 568 */
343 569
344 PUSHs (Nullsv); 570 XPUSHs (Nullsv);
345 /* this loop was inspired by pp_caller */ 571 /* this loop was inspired by pp_caller */
346 for (;;) 572 for (;;)
347 { 573 {
348 while (cxix >= 0) 574 while (expect_true (cxix >= 0))
349 { 575 {
350 PERL_CONTEXT *cx = &ccstk[cxix--]; 576 PERL_CONTEXT *cx = &ccstk[cxix--];
351 577
352 if (CxTYPE(cx) == CXt_SUB) 578 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
353 { 579 {
354 CV *cv = cx->blk_sub.cv; 580 CV *cv = cx->blk_sub.cv;
581
355 if (CvDEPTH(cv)) 582 if (expect_true (CvDEPTH (cv)))
356 { 583 {
357 EXTEND (SP, CvDEPTH(cv)*2); 584 EXTEND (SP, 3);
358
359 while (--CvDEPTH(cv))
360 {
361 /* this tells the restore code to increment CvDEPTH */
362 PUSHs (Nullsv);
363 PUSHs ((SV *)cv);
364 }
365
366 PUSHs ((SV *)CvPADLIST(cv)); 585 PUSHs ((SV *)CvPADLIST (cv));
586 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
367 PUSHs ((SV *)cv); 587 PUSHs ((SV *)cv);
368 588
589 CvDEPTH (cv) = 0;
369 get_padlist (cv); 590 get_padlist (aTHX_ cv);
370 } 591 }
371 } 592 }
372#ifdef CXt_FORMAT
373 else if (CxTYPE(cx) == CXt_FORMAT)
374 {
375 /* I never used formats, so how should I know how these are implemented? */
376 /* my bold guess is as a simple, plain sub... */
377 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378 }
379#endif
380 } 593 }
381 594
382 if (top_si->si_type == PERLSI_MAIN) 595 if (expect_true (top_si->si_type == PERLSI_MAIN))
383 break; 596 break;
384 597
385 top_si = top_si->si_prev; 598 top_si = top_si->si_prev;
386 ccstk = top_si->si_cxstack; 599 ccstk = top_si->si_cxstack;
387 cxix = top_si->si_cxix; 600 cxix = top_si->si_cxix;
388 } 601 }
389 602
390 PUTBACK; 603 PUTBACK;
391 } 604 }
392 605
393 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 606 /* allocate some space on the context stack for our purposes */
394 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 607 /* we manually unroll here, as usually 2 slots is enough */
395 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 608 if (SLOT_COUNT >= 1) CXINC;
609 if (SLOT_COUNT >= 2) CXINC;
610 if (SLOT_COUNT >= 3) CXINC;
611 {
612 int i;
613 for (i = 3; i < SLOT_COUNT; ++i)
614 CXINC;
615 }
616 cxstack_ix -= SLOT_COUNT; /* undo allocation */
396 617
397 c->dowarn = PL_dowarn;
398 c->in_eval = PL_in_eval;
399
400 c->curstackinfo = PL_curstackinfo;
401 c->curstack = PL_curstack;
402 c->mainstack = PL_mainstack; 618 c->mainstack = PL_mainstack;
403 c->stack_sp = PL_stack_sp; 619
404 c->op = PL_op; 620 {
405 c->curpad = PL_curpad; 621 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
406 c->comppad = PL_comppad; 622
407 c->compcv = PL_compcv; 623 slot->defav = GvAV (PL_defgv);
408 c->stack_base = PL_stack_base; 624 slot->defsv = DEFSV;
409 c->stack_max = PL_stack_max; 625 slot->errsv = ERRSV;
410 c->tmps_stack = PL_tmps_stack; 626 slot->irsgv = GvSV (irsgv);
411 c->tmps_floor = PL_tmps_floor; 627 slot->hinthv = GvHV (PL_hintgv);
412 c->tmps_ix = PL_tmps_ix; 628
413 c->tmps_max = PL_tmps_max; 629 #define VAR(name,type) slot->name = PL_ ## name;
414 c->markstack = PL_markstack; 630 # include "state.h"
415 c->markstack_ptr = PL_markstack_ptr; 631 #undef VAR
416 c->markstack_max = PL_markstack_max; 632 }
417 c->scopestack = PL_scopestack;
418 c->scopestack_ix = PL_scopestack_ix;
419 c->scopestack_max = PL_scopestack_max;
420 c->savestack = PL_savestack;
421 c->savestack_ix = PL_savestack_ix;
422 c->savestack_max = PL_savestack_max;
423#if PERL_VERSION < 9
424 c->retstack = PL_retstack;
425 c->retstack_ix = PL_retstack_ix;
426 c->retstack_max = PL_retstack_max;
427#endif
428 c->curpm = PL_curpm;
429 c->curcop = PL_curcop;
430} 633}
431 634
432/* 635/*
433 * allocate various perl stacks. This is an exact copy 636 * allocate various perl stacks. This is almost an exact copy
434 * of perl.c:init_stacks, except that it uses less memory 637 * of perl.c:init_stacks, except that it uses less memory
435 * on the (sometimes correct) assumption that coroutines do 638 * on the (sometimes correct) assumption that coroutines do
436 * not usually need a lot of stackspace. 639 * not usually need a lot of stackspace.
437 */ 640 */
641#if CORO_PREFER_PERL_FUNCTIONS
642# define coro_init_stacks(thx) init_stacks ()
643#else
438static void 644static void
439coro_init_stacks () 645coro_init_stacks (pTHX)
440{ 646{
441 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 647 PL_curstackinfo = new_stackinfo(32, 8);
442 PL_curstackinfo->si_type = PERLSI_MAIN; 648 PL_curstackinfo->si_type = PERLSI_MAIN;
443 PL_curstack = PL_curstackinfo->si_stack; 649 PL_curstack = PL_curstackinfo->si_stack;
444 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 650 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
445 651
446 PL_stack_base = AvARRAY(PL_curstack); 652 PL_stack_base = AvARRAY(PL_curstack);
447 PL_stack_sp = PL_stack_base; 653 PL_stack_sp = PL_stack_base;
448 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 654 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
449 655
450 New(50,PL_tmps_stack,96,SV*); 656 New(50,PL_tmps_stack,32,SV*);
451 PL_tmps_floor = -1; 657 PL_tmps_floor = -1;
452 PL_tmps_ix = -1; 658 PL_tmps_ix = -1;
453 PL_tmps_max = 96; 659 PL_tmps_max = 32;
454 660
455 New(54,PL_markstack,16,I32); 661 New(54,PL_markstack,16,I32);
456 PL_markstack_ptr = PL_markstack; 662 PL_markstack_ptr = PL_markstack;
457 PL_markstack_max = PL_markstack + 16; 663 PL_markstack_max = PL_markstack + 16;
458 664
459#ifdef SET_MARK_OFFSET 665#ifdef SET_MARK_OFFSET
460 SET_MARK_OFFSET; 666 SET_MARK_OFFSET;
461#endif 667#endif
462 668
463 New(54,PL_scopestack,16,I32); 669 New(54,PL_scopestack,8,I32);
464 PL_scopestack_ix = 0; 670 PL_scopestack_ix = 0;
465 PL_scopestack_max = 16; 671 PL_scopestack_max = 8;
466 672
467 New(54,PL_savestack,96,ANY); 673 New(54,PL_savestack,24,ANY);
468 PL_savestack_ix = 0; 674 PL_savestack_ix = 0;
469 PL_savestack_max = 96; 675 PL_savestack_max = 24;
470 676
471#if PERL_VERSION < 9 677#if !PERL_VERSION_ATLEAST (5,10,0)
472 New(54,PL_retstack,8,OP*); 678 New(54,PL_retstack,4,OP*);
473 PL_retstack_ix = 0; 679 PL_retstack_ix = 0;
474 PL_retstack_max = 8; 680 PL_retstack_max = 4;
475#endif 681#endif
476} 682}
683#endif
477 684
478/* 685/*
479 * destroy the stacks, the callchain etc... 686 * destroy the stacks, the callchain etc...
480 */ 687 */
481static void 688static void
482destroy_stacks() 689coro_destruct_stacks (pTHX)
483{ 690{
484 if (!IN_DESTRUCT)
485 {
486 /* is this ugly, I ask? */
487 LEAVE_SCOPE (0);
488
489 /* sure it is, but more important: is it correct?? :/ */
490 FREETMPS;
491
492 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
493 }
494
495 while (PL_curstackinfo->si_next) 691 while (PL_curstackinfo->si_next)
496 PL_curstackinfo = PL_curstackinfo->si_next; 692 PL_curstackinfo = PL_curstackinfo->si_next;
497 693
498 while (PL_curstackinfo) 694 while (PL_curstackinfo)
499 { 695 {
500 PERL_SI *p = PL_curstackinfo->si_prev; 696 PERL_SI *p = PL_curstackinfo->si_prev;
501 697
502 { /*D*//*remove*/
503 dSP;
504 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
505 PUTBACK; /* possibly superfluous */
506 }
507
508 if (!IN_DESTRUCT) 698 if (!IN_DESTRUCT)
509 {
510 dounwind (-1);/*D*//*remove*/
511 SvREFCNT_dec (PL_curstackinfo->si_stack); 699 SvREFCNT_dec (PL_curstackinfo->si_stack);
512 }
513 700
514 Safefree (PL_curstackinfo->si_cxstack); 701 Safefree (PL_curstackinfo->si_cxstack);
515 Safefree (PL_curstackinfo); 702 Safefree (PL_curstackinfo);
516 PL_curstackinfo = p; 703 PL_curstackinfo = p;
517 } 704 }
518 705
519 Safefree (PL_tmps_stack); 706 Safefree (PL_tmps_stack);
520 Safefree (PL_markstack); 707 Safefree (PL_markstack);
521 Safefree (PL_scopestack); 708 Safefree (PL_scopestack);
522 Safefree (PL_savestack); 709 Safefree (PL_savestack);
523#if PERL_VERSION < 9 710#if !PERL_VERSION_ATLEAST (5,10,0)
524 Safefree (PL_retstack); 711 Safefree (PL_retstack);
525#endif 712#endif
526} 713}
527 714
715#define CORO_RSS \
716 rss += sizeof (SYM (curstackinfo)); \
717 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
718 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
719 rss += SYM (tmps_max) * sizeof (SV *); \
720 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
721 rss += SYM (scopestack_max) * sizeof (I32); \
722 rss += SYM (savestack_max) * sizeof (ANY);
723
724static size_t
725coro_rss (pTHX_ struct coro *coro)
726{
727 size_t rss = sizeof (*coro);
728
729 if (coro->mainstack)
730 {
731 if (coro->flags & CF_RUNNING)
732 {
733 #define SYM(sym) PL_ ## sym
734 CORO_RSS;
735 #undef SYM
736 }
737 else
738 {
739 #define SYM(sym) coro->slot->sym
740 CORO_RSS;
741 #undef SYM
742 }
743 }
744
745 return rss;
746}
747
748/** coroutine stack handling ************************************************/
749
750static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
751static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
752static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
753
754/* apparently < 5.8.8 */
755#ifndef MgPV_nolen_const
756#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
757 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
758 (const char*)(mg)->mg_ptr)
759#endif
760
761/*
762 * This overrides the default magic get method of %SIG elements.
763 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
764 * and instead of tryign to save and restore the hash elements, we just provide
765 * readback here.
766 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
767 * not expecting this to actually change the hook. This is a potential problem
768 * when a schedule happens then, but we ignore this.
769 */
528static void 770static int
529setup_coro (struct coro *coro) 771coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
772{
773 const char *s = MgPV_nolen_const (mg);
774
775 if (*s == '_')
776 {
777 SV **svp = 0;
778
779 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
780 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
781
782 if (svp)
783 {
784 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
785 return 0;
786 }
787 }
788
789 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
790}
791
792static int
793coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
794{
795 const char *s = MgPV_nolen_const (mg);
796
797 if (*s == '_')
798 {
799 SV **svp = 0;
800
801 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
802 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
803
804 if (svp)
805 {
806 SV *old = *svp;
807 *svp = 0;
808 SvREFCNT_dec (old);
809 return 0;
810 }
811 }
812
813 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
814}
815
816static int
817coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
818{
819 const char *s = MgPV_nolen_const (mg);
820
821 if (*s == '_')
822 {
823 SV **svp = 0;
824
825 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
826 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
827
828 if (svp)
829 {
830 SV *old = *svp;
831 *svp = newSVsv (sv);
832 SvREFCNT_dec (old);
833 return 0;
834 }
835 }
836
837 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
838}
839
840static void
841prepare_nop (pTHX_ struct coro_transfer_args *ta)
842{
843 /* kind of mega-hacky, but works */
844 ta->next = ta->prev = (struct coro *)ta;
845}
846
847static int
848slf_check_nop (pTHX_ struct CoroSLF *frame)
849{
850 return 0;
851}
852
853static int
854slf_check_repeat (pTHX_ struct CoroSLF *frame)
855{
856 return 1;
857}
858
859static UNOP coro_setup_op;
860
861static void NOINLINE /* noinline to keep it out of the transfer fast path */
862coro_setup (pTHX_ struct coro *coro)
530{ 863{
531 /* 864 /*
532 * emulate part of the perl startup here. 865 * emulate part of the perl startup here.
533 */ 866 */
534 dTHX; 867 coro_init_stacks (aTHX);
868
869 PL_runops = RUNOPS_DEFAULT;
870 PL_curcop = &PL_compiling;
871 PL_in_eval = EVAL_NULL;
872 PL_comppad = 0;
873 PL_comppad_name = 0;
874 PL_comppad_name_fill = 0;
875 PL_comppad_name_floor = 0;
876 PL_curpm = 0;
877 PL_curpad = 0;
878 PL_localizing = 0;
879 PL_dirty = 0;
880 PL_restartop = 0;
881#if PERL_VERSION_ATLEAST (5,10,0)
882 PL_parser = 0;
883#endif
884 PL_hints = 0;
885
886 /* recreate the die/warn hooks */
887 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
888 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
889
890 GvSV (PL_defgv) = newSV (0);
891 GvAV (PL_defgv) = coro->args; coro->args = 0;
892 GvSV (PL_errgv) = newSV (0);
893 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
894 GvHV (PL_hintgv) = 0;
895 PL_rs = newSVsv (GvSV (irsgv));
896 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
897
898 {
535 dSP; 899 dSP;
536 UNOP myop; 900 UNOP myop;
537 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
538 901
539 coro_init_stacks (); 902 Zero (&myop, 1, UNOP);
540 /*PL_curcop = 0;*/ 903 myop.op_next = Nullop;
541 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 904 myop.op_type = OP_ENTERSUB;
905 myop.op_flags = OPf_WANT_VOID;
906
907 PUSHMARK (SP);
908 PUSHs ((SV *)coro->startcv);
909 PUTBACK;
910 PL_op = (OP *)&myop;
911 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
912 }
913
914 /* this newly created coroutine might be run on an existing cctx which most
915 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
916 */
917 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
918 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
919
920 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
921 coro_setup_op.op_next = PL_op;
922 coro_setup_op.op_type = OP_ENTERSUB;
923 coro_setup_op.op_ppaddr = pp_slf;
924 /* no flags etc. required, as an init function won't be called */
925
926 PL_op = (OP *)&coro_setup_op;
927
928 /* copy throw, in case it was set before coro_setup */
929 CORO_THROW = coro->except;
930}
931
932static void
933coro_destruct (pTHX_ struct coro *coro)
934{
935 if (!IN_DESTRUCT)
936 {
937 /* restore all saved variables and stuff */
938 LEAVE_SCOPE (0);
939 assert (PL_tmps_floor == -1);
940
941 /* free all temporaries */
942 FREETMPS;
943 assert (PL_tmps_ix == -1);
944
945 /* unwind all extra stacks */
946 POPSTACK_TO (PL_mainstack);
947
948 /* unwind main stack */
949 dounwind (-1);
950 }
951
952 SvREFCNT_dec (GvSV (PL_defgv));
542 SvREFCNT_dec (GvAV (PL_defgv)); 953 SvREFCNT_dec (GvAV (PL_defgv));
543 GvAV (PL_defgv) = coro->args; coro->args = 0; 954 SvREFCNT_dec (GvSV (PL_errgv));
955 SvREFCNT_dec (PL_defoutgv);
956 SvREFCNT_dec (PL_rs);
957 SvREFCNT_dec (GvSV (irsgv));
958 SvREFCNT_dec (GvHV (PL_hintgv));
544 959
545 SPAGAIN; 960 SvREFCNT_dec (PL_diehook);
961 SvREFCNT_dec (PL_warnhook);
962
963 SvREFCNT_dec (coro->saved_deffh);
964 SvREFCNT_dec (coro->rouse_cb);
965 SvREFCNT_dec (coro->invoke_cb);
966 SvREFCNT_dec (coro->invoke_av);
546 967
547 Zero (&myop, 1, UNOP); 968 coro_destruct_stacks (aTHX);
548 myop.op_next = Nullop;
549 myop.op_flags = OPf_WANT_VOID;
550
551 PL_op = (OP *)&myop;
552
553 PUSHMARK(SP);
554 XPUSHs (sub_init);
555 PUTBACK;
556 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
557 SPAGAIN;
558
559 ENTER; /* necessary e.g. for dounwind */
560} 969}
561 970
562static void 971INLINE void
563free_coro_mortal () 972free_coro_mortal (pTHX)
564{ 973{
565 if (coro_mortal) 974 if (expect_true (coro_mortal))
566 { 975 {
567 SvREFCNT_dec (coro_mortal); 976 SvREFCNT_dec (coro_mortal);
568 coro_mortal = 0; 977 coro_mortal = 0;
569 } 978 }
570} 979}
571 980
572static void 981static int
573prepare_cctx (coro_stack *cctx) 982runops_trace (pTHX)
574{ 983{
575 dSP; 984 COP *oldcop = 0;
576 UNOP myop; 985 int oldcxix = -2;
577 986
578 Zero (&myop, 1, UNOP); 987 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
579 myop.op_next = PL_op; 988 {
580 myop.op_flags = OPf_WANT_VOID | OPf_STACKED; 989 PERL_ASYNC_CHECK ();
581 990
582 PUSHMARK(SP); 991 if (cctx_current->flags & CC_TRACE_ALL)
583 EXTEND (SP, 2); 992 {
584 PUSHs (newSViv (PTR2IV (cctx))); 993 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
585 PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE)); 994 {
586 PUTBACK; 995 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
587 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX); 996 SV **bot, **top;
588 SPAGAIN; 997 AV *av = newAV (); /* return values */
589} 998 SV **cb;
999 dSP;
590 1000
1001 GV *gv = CvGV (cx->blk_sub.cv);
1002 SV *fullname = sv_2mortal (newSV (0));
1003 if (isGV (gv))
1004 gv_efullname3 (fullname, gv, 0);
1005
1006 bot = PL_stack_base + cx->blk_oldsp + 1;
1007 top = cx->blk_gimme == G_ARRAY ? SP + 1
1008 : cx->blk_gimme == G_SCALAR ? bot + 1
1009 : bot;
1010
1011 av_extend (av, top - bot);
1012 while (bot < top)
1013 av_push (av, SvREFCNT_inc_NN (*bot++));
1014
1015 PL_runops = RUNOPS_DEFAULT;
1016 ENTER;
1017 SAVETMPS;
1018 EXTEND (SP, 3);
1019 PUSHMARK (SP);
1020 PUSHs (&PL_sv_no);
1021 PUSHs (fullname);
1022 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1023 PUTBACK;
1024 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1025 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1026 SPAGAIN;
1027 FREETMPS;
1028 LEAVE;
1029 PL_runops = runops_trace;
1030 }
1031
1032 if (oldcop != PL_curcop)
1033 {
1034 oldcop = PL_curcop;
1035
1036 if (PL_curcop != &PL_compiling)
1037 {
1038 SV **cb;
1039
1040 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1041 {
1042 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1043
1044 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1045 {
1046 dSP;
1047 GV *gv = CvGV (cx->blk_sub.cv);
1048 SV *fullname = sv_2mortal (newSV (0));
1049
1050 if (isGV (gv))
1051 gv_efullname3 (fullname, gv, 0);
1052
1053 PL_runops = RUNOPS_DEFAULT;
1054 ENTER;
1055 SAVETMPS;
1056 EXTEND (SP, 3);
1057 PUSHMARK (SP);
1058 PUSHs (&PL_sv_yes);
1059 PUSHs (fullname);
1060 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1061 PUTBACK;
1062 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1063 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1064 SPAGAIN;
1065 FREETMPS;
1066 LEAVE;
1067 PL_runops = runops_trace;
1068 }
1069
1070 oldcxix = cxstack_ix;
1071 }
1072
1073 if (cctx_current->flags & CC_TRACE_LINE)
1074 {
1075 dSP;
1076
1077 PL_runops = RUNOPS_DEFAULT;
1078 ENTER;
1079 SAVETMPS;
1080 EXTEND (SP, 3);
1081 PL_runops = RUNOPS_DEFAULT;
1082 PUSHMARK (SP);
1083 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1084 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1085 PUTBACK;
1086 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1087 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1088 SPAGAIN;
1089 FREETMPS;
1090 LEAVE;
1091 PL_runops = runops_trace;
1092 }
1093 }
1094 }
1095 }
1096 }
1097
1098 TAINT_NOT;
1099 return 0;
1100}
1101
1102static struct CoroSLF cctx_ssl_frame;
1103
1104static void
1105slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1106{
1107 ta->prev = 0;
1108}
1109
591static void 1110static int
592coro_run (void *arg) 1111slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
593{ 1112{
594 /* 1113 *frame = cctx_ssl_frame;
595 * this is a _very_ stripped down perl interpreter ;)
596 */
597 UNLOCK;
598 1114
1115 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1116}
1117
1118/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1119static void NOINLINE
1120cctx_prepare (pTHX)
1121{
599 PL_top_env = &PL_start_env; 1122 PL_top_env = &PL_start_env;
600 prepare_cctx ((coro_stack *)arg);
601 1123
1124 if (cctx_current->flags & CC_TRACE)
1125 PL_runops = runops_trace;
1126
1127 /* we already must be executing an SLF op, there is no other valid way
1128 * that can lead to creation of a new cctx */
1129 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1130 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1131
1132 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1133 cctx_ssl_frame = slf_frame;
1134
1135 slf_frame.prepare = slf_prepare_set_stacklevel;
1136 slf_frame.check = slf_check_set_stacklevel;
1137}
1138
1139/* the tail of transfer: execute stuff we can only do after a transfer */
1140INLINE void
1141transfer_tail (pTHX)
1142{
1143 free_coro_mortal (aTHX);
1144}
1145
1146/*
1147 * this is a _very_ stripped down perl interpreter ;)
1148 */
1149static void
1150cctx_run (void *arg)
1151{
1152#ifdef USE_ITHREADS
1153# if CORO_PTHREAD
1154 PERL_SET_CONTEXT (coro_thx);
1155# endif
1156#endif
1157 {
1158 dTHX;
1159
1160 /* normally we would need to skip the entersub here */
1161 /* not doing so will re-execute it, which is exactly what we want */
1162 /* PL_nop = PL_nop->op_next */
1163
1164 /* inject a fake subroutine call to cctx_init */
1165 cctx_prepare (aTHX);
1166
1167 /* cctx_run is the alternative tail of transfer() */
1168 transfer_tail (aTHX);
1169
602 /* somebody will hit me for both perl_run and PL_restartop */ 1170 /* somebody or something will hit me for both perl_run and PL_restartop */
603 perl_run (PERL_GET_CONTEXT); 1171 PL_restartop = PL_op;
1172 perl_run (PL_curinterp);
1173 /*
1174 * Unfortunately, there is no way to get at the return values of the
1175 * coro body here, as perl_run destroys these
1176 */
604 1177
605 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1178 /*
606 abort (); 1179 * If perl-run returns we assume exit() was being called or the coro
1180 * fell off the end, which seems to be the only valid (non-bug)
1181 * reason for perl_run to return. We try to exit by jumping to the
1182 * bootstrap-time "top" top_env, as we cannot restore the "main"
1183 * coroutine as Coro has no such concept.
1184 * This actually isn't valid with the pthread backend, but OSes requiring
1185 * that backend are too broken to do it in a standards-compliant way.
1186 */
1187 PL_top_env = main_top_env;
1188 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1189 }
607} 1190}
608 1191
609static coro_stack * 1192static coro_cctx *
610stack_new () 1193cctx_new ()
611{ 1194{
612 coro_stack *stack; 1195 coro_cctx *cctx;
613 1196
1197 ++cctx_count;
614 New (0, stack, 1, coro_stack); 1198 New (0, cctx, 1, coro_cctx);
1199
1200 cctx->gen = cctx_gen;
1201 cctx->flags = 0;
1202 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1203
1204 return cctx;
1205}
1206
1207/* create a new cctx only suitable as source */
1208static coro_cctx *
1209cctx_new_empty ()
1210{
1211 coro_cctx *cctx = cctx_new ();
1212
1213 cctx->sptr = 0;
1214 coro_create (&cctx->cctx, 0, 0, 0, 0);
1215
1216 return cctx;
1217}
1218
1219/* create a new cctx suitable as destination/running a perl interpreter */
1220static coro_cctx *
1221cctx_new_run ()
1222{
1223 coro_cctx *cctx = cctx_new ();
1224 void *stack_start;
1225 size_t stack_size;
615 1226
616#if HAVE_MMAP 1227#if HAVE_MMAP
617
618 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1228 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
619 /* mmap suppsedly does allocate-on-write for us */ 1229 /* mmap supposedly does allocate-on-write for us */
620 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1230 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
621 1231
622 if (stack->sptr == (void *)-1) 1232 if (cctx->sptr != (void *)-1)
1233 {
1234 #if CORO_STACKGUARD
1235 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1236 #endif
1237 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1238 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1239 cctx->flags |= CC_MAPPED;
623 { 1240 }
1241 else
1242#endif
1243 {
1244 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1245 New (0, cctx->sptr, cctx_stacksize, long);
1246
1247 if (!cctx->sptr)
1248 {
624 perror ("FATAL: unable to mmap stack for coroutine"); 1249 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
625 _exit (EXIT_FAILURE); 1250 _exit (EXIT_FAILURE);
1251 }
1252
1253 stack_start = cctx->sptr;
1254 stack_size = cctx->ssize;
1255 }
1256
1257 #if CORO_USE_VALGRIND
1258 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1259 #endif
1260
1261 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1262
1263 return cctx;
1264}
1265
1266static void
1267cctx_destroy (coro_cctx *cctx)
1268{
1269 if (!cctx)
1270 return;
1271
1272 assert (cctx != cctx_current);//D temporary
1273
1274 --cctx_count;
1275 coro_destroy (&cctx->cctx);
1276
1277 /* coro_transfer creates new, empty cctx's */
1278 if (cctx->sptr)
626 } 1279 {
1280 #if CORO_USE_VALGRIND
1281 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1282 #endif
627 1283
628# if STACKGUARD 1284#if HAVE_MMAP
629 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1285 if (cctx->flags & CC_MAPPED)
1286 munmap (cctx->sptr, cctx->ssize);
1287 else
630# endif 1288#endif
1289 Safefree (cctx->sptr);
1290 }
631 1291
1292 Safefree (cctx);
1293}
1294
1295/* wether this cctx should be destructed */
1296#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1297
1298static coro_cctx *
1299cctx_get (pTHX)
1300{
1301 while (expect_true (cctx_first))
1302 {
1303 coro_cctx *cctx = cctx_first;
1304 cctx_first = cctx->next;
1305 --cctx_idle;
1306
1307 if (expect_true (!CCTX_EXPIRED (cctx)))
1308 return cctx;
1309
1310 cctx_destroy (cctx);
1311 }
1312
1313 return cctx_new_run ();
1314}
1315
1316static void
1317cctx_put (coro_cctx *cctx)
1318{
1319 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1320
1321 /* free another cctx if overlimit */
1322 if (expect_false (cctx_idle >= cctx_max_idle))
1323 {
1324 coro_cctx *first = cctx_first;
1325 cctx_first = first->next;
1326 --cctx_idle;
1327
1328 cctx_destroy (first);
1329 }
1330
1331 ++cctx_idle;
1332 cctx->next = cctx_first;
1333 cctx_first = cctx;
1334}
1335
1336/** coroutine switching *****************************************************/
1337
1338static void
1339transfer_check (pTHX_ struct coro *prev, struct coro *next)
1340{
1341 /* TODO: throwing up here is considered harmful */
1342
1343 if (expect_true (prev != next))
1344 {
1345 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1346 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1347
1348 if (expect_false (next->flags & CF_RUNNING))
1349 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1350
1351 if (expect_false (next->flags & CF_DESTROYED))
1352 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1353
1354#if !PERL_VERSION_ATLEAST (5,10,0)
1355 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1356 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1357#endif
1358 }
1359}
1360
1361/* always use the TRANSFER macro */
1362static void NOINLINE /* noinline so we have a fixed stackframe */
1363transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1364{
1365 dSTACKLEVEL;
1366
1367 /* sometimes transfer is only called to set idle_sp */
1368 if (expect_false (!prev))
1369 {
1370 cctx_current->idle_sp = STACKLEVEL;
1371 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1372 }
1373 else if (expect_true (prev != next))
1374 {
1375 coro_cctx *cctx_prev;
1376
1377 if (expect_false (prev->flags & CF_NEW))
1378 {
1379 /* create a new empty/source context */
1380 prev->flags &= ~CF_NEW;
1381 prev->flags |= CF_RUNNING;
1382 }
1383
1384 prev->flags &= ~CF_RUNNING;
1385 next->flags |= CF_RUNNING;
1386
1387 /* first get rid of the old state */
1388 save_perl (aTHX_ prev);
1389
1390 if (expect_false (next->flags & CF_NEW))
1391 {
1392 /* need to start coroutine */
1393 next->flags &= ~CF_NEW;
1394 /* setup coroutine call */
1395 coro_setup (aTHX_ next);
1396 }
1397 else
1398 load_perl (aTHX_ next);
1399
1400 assert (!prev->cctx);//D temporary
1401
1402 /* possibly untie and reuse the cctx */
1403 if (expect_true (
1404 cctx_current->idle_sp == STACKLEVEL
1405 && !(cctx_current->flags & CC_TRACE)
1406 && !force_cctx
1407 ))
1408 {
1409 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1410 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1411
1412 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1413 /* without this the next cctx_get might destroy the running cctx while still in use */
1414 if (expect_false (CCTX_EXPIRED (cctx_current)))
1415 if (expect_true (!next->cctx))
1416 next->cctx = cctx_get (aTHX);
1417
1418 cctx_put (cctx_current);
1419 }
1420 else
1421 prev->cctx = cctx_current;
1422
1423 ++next->usecount;
1424
1425 cctx_prev = cctx_current;
1426 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1427
1428 next->cctx = 0;
1429
1430 if (expect_false (cctx_prev != cctx_current))
1431 {
1432 cctx_prev->top_env = PL_top_env;
1433 PL_top_env = cctx_current->top_env;
1434 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1435 }
1436
1437 transfer_tail (aTHX);
1438 }
1439}
1440
1441#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1442#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1443
1444/** high level stuff ********************************************************/
1445
1446static int
1447coro_state_destroy (pTHX_ struct coro *coro)
1448{
1449 if (coro->flags & CF_DESTROYED)
1450 return 0;
1451
1452 if (coro->on_destroy)
1453 coro->on_destroy (aTHX_ coro);
1454
1455 coro->flags |= CF_DESTROYED;
1456
1457 if (coro->flags & CF_READY)
1458 {
1459 /* reduce nready, as destroying a ready coro effectively unreadies it */
1460 /* alternative: look through all ready queues and remove the coro */
1461 --coro_nready;
1462 }
1463 else
1464 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1465
1466 if (coro->mainstack && coro->mainstack != main_mainstack)
1467 {
1468 struct coro temp;
1469
1470 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1471
1472 save_perl (aTHX_ &temp);
1473 load_perl (aTHX_ coro);
1474
1475 coro_destruct (aTHX_ coro);
1476
1477 load_perl (aTHX_ &temp);
1478
1479 coro->slot = 0;
1480 }
1481
1482 cctx_destroy (coro->cctx);
1483 SvREFCNT_dec (coro->startcv);
1484 SvREFCNT_dec (coro->args);
1485 SvREFCNT_dec (CORO_THROW);
1486
1487 if (coro->next) coro->next->prev = coro->prev;
1488 if (coro->prev) coro->prev->next = coro->next;
1489 if (coro == coro_first) coro_first = coro->next;
1490
1491 return 1;
1492}
1493
1494static int
1495coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1496{
1497 struct coro *coro = (struct coro *)mg->mg_ptr;
1498 mg->mg_ptr = 0;
1499
1500 coro->hv = 0;
1501
1502 if (--coro->refcnt < 0)
1503 {
1504 coro_state_destroy (aTHX_ coro);
1505 Safefree (coro);
1506 }
1507
1508 return 0;
1509}
1510
1511static int
1512coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1513{
1514 struct coro *coro = (struct coro *)mg->mg_ptr;
1515
1516 ++coro->refcnt;
1517
1518 return 0;
1519}
1520
1521static MGVTBL coro_state_vtbl = {
1522 0, 0, 0, 0,
1523 coro_state_free,
1524 0,
1525#ifdef MGf_DUP
1526 coro_state_dup,
632#else 1527#else
633 1528# define MGf_DUP 0
634 stack->ssize = STACKSIZE * (long)sizeof (long);
635 New (0, stack->sptr, STACKSIZE, long);
636
637 if (!stack->sptr)
638 {
639 perror (stderr, "FATAL: unable to malloc stack for coroutine");
640 _exit (EXIT_FAILURE);
641 }
642
643#endif 1529#endif
1530};
644 1531
645 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1532static void
1533prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1534{
1535 ta->prev = SvSTATE (prev_sv);
1536 ta->next = SvSTATE (next_sv);
1537 TRANSFER_CHECK (*ta);
1538}
646 1539
1540static void
1541api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1542{
1543 struct coro_transfer_args ta;
1544
1545 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1546 TRANSFER (ta, 1);
1547}
1548
1549/*****************************************************************************/
1550/* gensub: simple closure generation utility */
1551
1552#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1553
1554/* create a closure from XS, returns a code reference */
1555/* the arg can be accessed via GENSUB_ARG from the callback */
1556/* the callback must use dXSARGS/XSRETURN */
1557static SV *
1558gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1559{
1560 CV *cv = (CV *)newSV (0);
1561
1562 sv_upgrade ((SV *)cv, SVt_PVCV);
1563
1564 CvANON_on (cv);
1565 CvISXSUB_on (cv);
1566 CvXSUB (cv) = xsub;
1567 GENSUB_ARG = arg;
1568
1569 return newRV_noinc ((SV *)cv);
1570}
1571
1572/** Coro ********************************************************************/
1573
1574INLINE void
1575coro_enq (pTHX_ struct coro *coro)
1576{
1577 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1578}
1579
1580INLINE SV *
1581coro_deq (pTHX)
1582{
1583 int prio;
1584
1585 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1586 if (AvFILLp (coro_ready [prio]) >= 0)
1587 return av_shift (coro_ready [prio]);
1588
647 return stack; 1589 return 0;
648} 1590}
649 1591
650static void 1592static int
651stack_free (coro_stack *stack) 1593api_ready (pTHX_ SV *coro_sv)
652{ 1594{
653 if (!stack) 1595 struct coro *coro;
1596 SV *sv_hook;
1597 void (*xs_hook)(void);
1598
1599 coro = SvSTATE (coro_sv);
1600
1601 if (coro->flags & CF_READY)
654 return; 1602 return 0;
655 1603
656#if HAVE_MMAP 1604 coro->flags |= CF_READY;
657 munmap (stack->sptr, stack->ssize);
658#else
659 Safefree (stack->sptr);
660#endif
661 1605
662 Safefree (stack); 1606 sv_hook = coro_nready ? 0 : coro_readyhook;
663} 1607 xs_hook = coro_nready ? 0 : coroapi.readyhook;
664 1608
665static coro_stack *stack_first; 1609 coro_enq (aTHX_ coro);
1610 ++coro_nready;
666 1611
667static coro_stack * 1612 if (sv_hook)
668stack_get ()
669{
670 coro_stack *stack;
671
672 if (stack_first)
673 {
674 stack = stack_first;
675 stack_first = stack->next;
676 }
677 else
678 { 1613 {
679 stack = stack_new (); 1614 dSP;
680 PL_op = PL_op->op_next; 1615
1616 ENTER;
1617 SAVETMPS;
1618
1619 PUSHMARK (SP);
1620 PUTBACK;
1621 call_sv (sv_hook, G_VOID | G_DISCARD);
1622
1623 FREETMPS;
1624 LEAVE;
681 } 1625 }
682 1626
1627 if (xs_hook)
1628 xs_hook ();
1629
683 return stack; 1630 return 1;
684} 1631}
685 1632
686static void 1633static int
687stack_put (coro_stack *stack) 1634api_is_ready (pTHX_ SV *coro_sv)
688{ 1635{
689 stack->next = stack_first; 1636 return !!(SvSTATE (coro_sv)->flags & CF_READY);
690 stack_first = stack;
691} 1637}
692 1638
693/* never call directly, always through the coro_state_transfer global variable */ 1639/* expects to own a reference to next->hv */
694static void 1640INLINE void
695transfer_impl (struct coro *prev, struct coro *next, int flags) 1641prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
696{ 1642{
697 dSTACKLEVEL; 1643 SV *prev_sv = SvRV (coro_current);
698 1644
699 /* sometimes transfer is only called to set idle_sp */ 1645 ta->prev = SvSTATE_hv (prev_sv);
700 if (flags == TRANSFER_SET_STACKLEVEL) 1646 ta->next = next;
701 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
702 else if (prev != next)
703 {
704 coro_stack *prev__stack;
705 1647
706 LOCK; 1648 TRANSFER_CHECK (*ta);
707 1649
708 if (next->mainstack) 1650 SvRV_set (coro_current, (SV *)next->hv);
1651
1652 free_coro_mortal (aTHX);
1653 coro_mortal = prev_sv;
1654}
1655
1656static void
1657prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1658{
1659 for (;;)
1660 {
1661 SV *next_sv = coro_deq (aTHX);
1662
1663 if (expect_true (next_sv))
709 { 1664 {
710 /* coroutine already started */ 1665 struct coro *next = SvSTATE_hv (next_sv);
711 SAVE (prev, flags); 1666
712 LOAD (next); 1667 /* cannot transfer to destroyed coros, skip and look for next */
1668 if (expect_false (next->flags & CF_DESTROYED))
1669 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1670 else
1671 {
1672 next->flags &= ~CF_READY;
1673 --coro_nready;
1674
1675 prepare_schedule_to (aTHX_ ta, next);
1676 break;
1677 }
713 } 1678 }
714 else 1679 else
715 { 1680 {
716 /* need to start coroutine */ 1681 /* nothing to schedule: call the idle handler */
717 /* first get rid of the old state */ 1682 if (SvROK (sv_idle)
718 SAVE (prev, -1); 1683 && SvOBJECT (SvRV (sv_idle)))
719 /* setup coroutine call */ 1684 {
720 setup_coro (next); 1685 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
721 /* need a stack */ 1686 api_ready (aTHX_ SvRV (sv_idle));
722 next->stack = 0; 1687 --coro_nready;
1688 }
1689 else
1690 {
1691 dSP;
1692
1693 ENTER;
1694 SAVETMPS;
1695
1696 PUSHMARK (SP);
1697 PUTBACK;
1698 call_sv (sv_idle, G_VOID | G_DISCARD);
1699
1700 FREETMPS;
1701 LEAVE;
1702 }
723 } 1703 }
1704 }
1705}
724 1706
725 if (!prev->stack) 1707INLINE void
726 /* create a new empty context */ 1708prepare_cede (pTHX_ struct coro_transfer_args *ta)
727 Newz (0, prev->stack, 1, coro_stack); 1709{
1710 api_ready (aTHX_ coro_current);
1711 prepare_schedule (aTHX_ ta);
1712}
728 1713
729 prev__stack = prev->stack; 1714INLINE void
1715prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1716{
1717 SV *prev = SvRV (coro_current);
730 1718
731 /* possibly "free" the stack */ 1719 if (coro_nready)
732 if (prev__stack->idle_sp == STACKLEVEL) 1720 {
1721 prepare_schedule (aTHX_ ta);
1722 api_ready (aTHX_ prev);
1723 }
1724 else
1725 prepare_nop (aTHX_ ta);
1726}
1727
1728static void
1729api_schedule (pTHX)
1730{
1731 struct coro_transfer_args ta;
1732
1733 prepare_schedule (aTHX_ &ta);
1734 TRANSFER (ta, 1);
1735}
1736
1737static void
1738api_schedule_to (pTHX_ SV *coro_sv)
1739{
1740 struct coro_transfer_args ta;
1741 struct coro *next = SvSTATE (coro_sv);
1742
1743 SvREFCNT_inc_NN (coro_sv);
1744 prepare_schedule_to (aTHX_ &ta, next);
1745}
1746
1747static int
1748api_cede (pTHX)
1749{
1750 struct coro_transfer_args ta;
1751
1752 prepare_cede (aTHX_ &ta);
1753
1754 if (expect_true (ta.prev != ta.next))
1755 {
1756 TRANSFER (ta, 1);
1757 return 1;
1758 }
1759 else
1760 return 0;
1761}
1762
1763static int
1764api_cede_notself (pTHX)
1765{
1766 if (coro_nready)
1767 {
1768 struct coro_transfer_args ta;
1769
1770 prepare_cede_notself (aTHX_ &ta);
1771 TRANSFER (ta, 1);
1772 return 1;
1773 }
1774 else
1775 return 0;
1776}
1777
1778static void
1779api_trace (pTHX_ SV *coro_sv, int flags)
1780{
1781 struct coro *coro = SvSTATE (coro_sv);
1782
1783 if (coro->flags & CF_RUNNING)
1784 croak ("cannot enable tracing on a running coroutine, caught");
1785
1786 if (flags & CC_TRACE)
1787 {
1788 if (!coro->cctx)
1789 coro->cctx = cctx_new_run ();
1790 else if (!(coro->cctx->flags & CC_TRACE))
1791 croak ("cannot enable tracing on coroutine with custom stack, caught");
1792
1793 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1794 }
1795 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1796 {
1797 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1798
1799 if (coro->flags & CF_RUNNING)
1800 PL_runops = RUNOPS_DEFAULT;
1801 else
1802 coro->slot->runops = RUNOPS_DEFAULT;
1803 }
1804}
1805
1806static void
1807coro_call_on_destroy (pTHX_ struct coro *coro)
1808{
1809 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1810 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1811
1812 if (on_destroyp)
1813 {
1814 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1815
1816 while (AvFILLp (on_destroy) >= 0)
733 { 1817 {
734 stack_put (prev__stack); 1818 dSP; /* don't disturb outer sp */
735 prev->stack = 0; 1819 SV *cb = av_pop (on_destroy);
1820
1821 PUSHMARK (SP);
1822
1823 if (statusp)
1824 {
1825 int i;
1826 AV *status = (AV *)SvRV (*statusp);
1827 EXTEND (SP, AvFILLp (status) + 1);
1828
1829 for (i = 0; i <= AvFILLp (status); ++i)
1830 PUSHs (AvARRAY (status)[i]);
1831 }
1832
1833 PUTBACK;
1834 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
736 } 1835 }
737
738 if (!next->stack)
739 next->stack = stack_get ();
740
741 if (prev__stack != next->stack)
742 {
743 prev__stack->top_env = PL_top_env;
744 PL_top_env = next->stack->top_env;
745 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
746 }
747
748 free_coro_mortal ();
749
750 UNLOCK;
751 }
752}
753
754/* use this function pointer to call the above function */
755/* this is done to increase chances of the compiler not inlining the call */
756/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
757void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
758
759struct transfer_args
760{
761 struct coro *prev, *next;
762 int flags;
763};
764
765#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
766
767static void
768coro_state_destroy (struct coro *coro)
769{
770 if (coro->refcnt--)
771 return;
772
773 if (coro->mainstack && coro->mainstack != main_mainstack)
774 { 1836 }
775 struct coro temp;
776
777 SAVE ((&temp), TRANSFER_SAVE_ALL);
778 LOAD (coro);
779
780 destroy_stacks ();
781
782 LOAD ((&temp)); /* this will get rid of defsv etc.. */
783
784 coro->mainstack = 0;
785 }
786
787 stack_free (coro->stack);
788 SvREFCNT_dec (coro->args);
789 Safefree (coro);
790} 1837}
1838
1839static void
1840slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1841{
1842 int i;
1843 HV *hv = (HV *)SvRV (coro_current);
1844 AV *av = newAV ();
1845
1846 av_extend (av, items - 1);
1847 for (i = 0; i < items; ++i)
1848 av_push (av, SvREFCNT_inc_NN (arg [i]));
1849
1850 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1851
1852 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1853 api_ready (aTHX_ sv_manager);
1854
1855 frame->prepare = prepare_schedule;
1856 frame->check = slf_check_repeat;
1857}
1858
1859/*****************************************************************************/
1860/* async pool handler */
791 1861
792static int 1862static int
793coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1863slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
794{ 1864{
1865 HV *hv = (HV *)SvRV (coro_current);
795 struct coro *coro = (struct coro *)mg->mg_ptr; 1866 struct coro *coro = (struct coro *)frame->data;
796 mg->mg_ptr = 0;
797 1867
798 coro_state_destroy (coro); 1868 if (!coro->invoke_cb)
799 1869 return 1; /* loop till we have invoke */
800 return 0; 1870 else
801}
802
803static int
804coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
805{
806 struct coro *coro = (struct coro *)mg->mg_ptr;
807
808 ++coro->refcnt;
809
810 return 0;
811}
812
813static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
814
815static struct coro *
816SvSTATE (SV *coro)
817{
818 HV *stash;
819 MAGIC *mg;
820
821 if (SvROK (coro))
822 coro = SvRV (coro);
823
824 stash = SvSTASH (coro);
825 if (stash != coro_stash && stash != coro_state_stash)
826 {
827 /* very slow, but rare, check */
828 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
829 croak ("Coro::State object required");
830 }
831
832 mg = SvMAGIC (coro);
833 assert (mg->mg_type == PERL_MAGIC_ext);
834 return (struct coro *)mg->mg_ptr;
835}
836
837static void
838prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
839{
840 ta->prev = SvSTATE (prev);
841 ta->next = SvSTATE (next);
842 ta->flags = flags;
843}
844
845static void
846api_transfer (SV *prev, SV *next, int flags)
847{
848 dTHX;
849 struct transfer_args ta;
850
851 prepare_transfer (&ta, prev, next, flags);
852 TRANSFER (ta);
853}
854
855/** Coro ********************************************************************/
856
857#define PRIO_MAX 3
858#define PRIO_HIGH 1
859#define PRIO_NORMAL 0
860#define PRIO_LOW -1
861#define PRIO_IDLE -3
862#define PRIO_MIN -4
863
864/* for Coro.pm */
865static GV *coro_current, *coro_idle;
866static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867static int coro_nready;
868
869static void
870coro_enq (SV *sv)
871{
872 int prio;
873
874 if (SvTYPE (sv) != SVt_PVHV)
875 croak ("Coro::ready tried to enqueue something that is not a coroutine");
876
877 prio = SvSTATE (sv)->prio;
878
879 av_push (coro_ready [prio - PRIO_MIN], sv);
880 coro_nready++;
881}
882
883static SV *
884coro_deq (int min_prio)
885{
886 int prio = PRIO_MAX - PRIO_MIN;
887
888 min_prio -= PRIO_MIN;
889 if (min_prio < 0)
890 min_prio = 0;
891
892 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
893 if (AvFILLp (coro_ready [prio]) >= 0)
894 { 1871 {
895 coro_nready--; 1872 hv_store (hv, "desc", sizeof ("desc") - 1,
896 return av_shift (coro_ready [prio]); 1873 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
897 }
898 1874
899 return 0; 1875 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
900}
901
902static void
903api_ready (SV *coro)
904{
905 dTHX;
906
907 if (SvROK (coro))
908 coro = SvRV (coro);
909
910 LOCK;
911 coro_enq (SvREFCNT_inc (coro));
912 UNLOCK;
913}
914
915static void
916prepare_schedule (struct transfer_args *ta)
917{
918 SV *current, *prev, *next;
919
920 current = GvSV (coro_current);
921
922 for (;;)
923 {
924 LOCK;
925 next = coro_deq (PRIO_MIN);
926 UNLOCK;
927
928 if (next)
929 break;
930 1876
931 { 1877 {
932 dSP; 1878 dSP;
933 1879 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK; 1880 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 } 1881 }
1882
1883 SvREFCNT_dec (GvAV (PL_defgv));
1884 GvAV (PL_defgv) = coro->invoke_av;
1885 coro->invoke_av = 0;
1886
1887 return 0;
1888 }
1889}
1890
1891static void
1892slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1893{
1894 HV *hv = (HV *)SvRV (coro_current);
1895 struct coro *coro = SvSTATE_hv ((SV *)hv);
1896
1897 if (expect_true (coro->saved_deffh))
944 } 1898 {
1899 /* subsequent iteration */
1900 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1901 coro->saved_deffh = 0;
945 1902
946 prev = SvRV (current); 1903 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
947 SvRV (current) = next; 1904 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1905 {
1906 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1907 coro->invoke_av = newAV ();
948 1908
949 /* free this only after the transfer */ 1909 frame->prepare = prepare_nop;
950 LOCK; 1910 }
951 free_coro_mortal (); 1911 else
952 UNLOCK; 1912 {
953 coro_mortal = prev; 1913 av_clear (GvAV (PL_defgv));
1914 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
954 1915
955 ta->prev = SvSTATE (prev); 1916 coro->prio = 0;
956 ta->next = SvSTATE (next);
957 ta->flags = TRANSFER_SAVE_ALL;
958}
959 1917
1918 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1919 api_trace (aTHX_ coro_current, 0);
1920
1921 frame->prepare = prepare_schedule;
1922 av_push (av_async_pool, SvREFCNT_inc (hv));
1923 }
1924 }
1925 else
1926 {
1927 /* first iteration, simply fall through */
1928 frame->prepare = prepare_nop;
1929 }
1930
1931 frame->check = slf_check_pool_handler;
1932 frame->data = (void *)coro;
1933}
1934
1935/*****************************************************************************/
1936/* rouse callback */
1937
1938#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1939
1940static void
1941coro_rouse_callback (pTHX_ CV *cv)
1942{
1943 dXSARGS;
1944 SV *data = (SV *)GENSUB_ARG;
1945
1946 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1947 {
1948 /* first call, set args */
1949 AV *av = newAV ();
1950 SV *coro = SvRV (data);
1951
1952 SvRV_set (data, (SV *)av);
1953 api_ready (aTHX_ coro);
1954 SvREFCNT_dec (coro);
1955
1956 /* better take a full copy of the arguments */
1957 while (items--)
1958 av_store (av, items, newSVsv (ST (items)));
1959 }
1960
1961 XSRETURN_EMPTY;
1962}
1963
960static void 1964static int
1965slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1966{
1967 SV *data = (SV *)frame->data;
1968
1969 if (CORO_THROW)
1970 return 0;
1971
1972 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1973 return 1;
1974
1975 /* now push all results on the stack */
1976 {
1977 dSP;
1978 AV *av = (AV *)SvRV (data);
1979 int i;
1980
1981 EXTEND (SP, AvFILLp (av) + 1);
1982 for (i = 0; i <= AvFILLp (av); ++i)
1983 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1984
1985 /* we have stolen the elements, so ste length to zero and free */
1986 AvFILLp (av) = -1;
1987 av_undef (av);
1988
1989 PUTBACK;
1990 }
1991
1992 return 0;
1993}
1994
1995static void
1996slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1997{
1998 SV *cb;
1999
2000 if (items)
2001 cb = arg [0];
2002 else
2003 {
2004 struct coro *coro = SvSTATE_current;
2005
2006 if (!coro->rouse_cb)
2007 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2008
2009 cb = sv_2mortal (coro->rouse_cb);
2010 coro->rouse_cb = 0;
2011 }
2012
2013 if (!SvROK (cb)
2014 || SvTYPE (SvRV (cb)) != SVt_PVCV
2015 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2016 croak ("Coro::rouse_wait called with illegal callback argument,");
2017
2018 {
2019 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2020 SV *data = (SV *)GENSUB_ARG;
2021
2022 frame->data = (void *)data;
2023 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2024 frame->check = slf_check_rouse_wait;
2025 }
2026}
2027
2028static SV *
2029coro_new_rouse_cb (pTHX)
2030{
2031 HV *hv = (HV *)SvRV (coro_current);
2032 struct coro *coro = SvSTATE_hv (hv);
2033 SV *data = newRV_inc ((SV *)hv);
2034 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2035
2036 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2037 SvREFCNT_dec (data); /* magicext increases the refcount */
2038
2039 SvREFCNT_dec (coro->rouse_cb);
2040 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2041
2042 return cb;
2043}
2044
2045/*****************************************************************************/
2046/* schedule-like-function opcode (SLF) */
2047
2048static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2049static const CV *slf_cv;
2050static SV **slf_argv;
2051static int slf_argc, slf_arga; /* count, allocated */
2052static I32 slf_ax; /* top of stack, for restore */
2053
2054/* this restores the stack in the case we patched the entersub, to */
2055/* recreate the stack frame as perl will on following calls */
2056/* since entersub cleared the stack */
2057static OP *
2058pp_restore (pTHX)
2059{
2060 int i;
2061 SV **SP = PL_stack_base + slf_ax;
2062
2063 PUSHMARK (SP);
2064
2065 EXTEND (SP, slf_argc + 1);
2066
2067 for (i = 0; i < slf_argc; ++i)
2068 PUSHs (sv_2mortal (slf_argv [i]));
2069
2070 PUSHs ((SV *)CvGV (slf_cv));
2071
2072 RETURNOP (slf_restore.op_first);
2073}
2074
2075static void
2076slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2077{
2078 SV **arg = (SV **)slf_frame.data;
2079
2080 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2081}
2082
2083static void
2084slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2085{
2086 if (items != 2)
2087 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2088
2089 frame->prepare = slf_prepare_transfer;
2090 frame->check = slf_check_nop;
2091 frame->data = (void *)arg; /* let's hope it will stay valid */
2092}
2093
2094static void
2095slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2096{
2097 frame->prepare = prepare_schedule;
2098 frame->check = slf_check_nop;
2099}
2100
2101static void
961prepare_cede (struct transfer_args *ta) 2102slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
962{ 2103{
963 LOCK; 2104 struct coro *next = (struct coro *)slf_frame.data;
964 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966 2105
2106 SvREFCNT_inc_NN (next->hv);
967 prepare_schedule (ta); 2107 prepare_schedule_to (aTHX_ ta, next);
968} 2108}
969 2109
970static void 2110static void
971api_schedule (void) 2111slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
972{ 2112{
973 dTHX; 2113 if (!items)
2114 croak ("Coro::schedule_to expects a coroutine argument, caught");
2115
2116 frame->data = (void *)SvSTATE (arg [0]);
2117 frame->prepare = slf_prepare_schedule_to;
2118 frame->check = slf_check_nop;
2119}
2120
2121static void
2122slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2123{
2124 api_ready (aTHX_ SvRV (coro_current));
2125
2126 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2127}
2128
2129static void
2130slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2131{
2132 frame->prepare = prepare_cede;
2133 frame->check = slf_check_nop;
2134}
2135
2136static void
2137slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2138{
2139 frame->prepare = prepare_cede_notself;
2140 frame->check = slf_check_nop;
2141}
2142
2143/*
2144 * these not obviously related functions are all rolled into one
2145 * function to increase chances that they all will call transfer with the same
2146 * stack offset
2147 * SLF stands for "schedule-like-function".
2148 */
2149static OP *
2150pp_slf (pTHX)
2151{
2152 I32 checkmark; /* mark SP to see how many elements check has pushed */
2153
2154 /* set up the slf frame, unless it has already been set-up */
2155 /* the latter happens when a new coro has been started */
2156 /* or when a new cctx was attached to an existing coroutine */
2157 if (expect_true (!slf_frame.prepare))
2158 {
2159 /* first iteration */
2160 dSP;
2161 SV **arg = PL_stack_base + TOPMARK + 1;
2162 int items = SP - arg; /* args without function object */
2163 SV *gv = *sp;
2164
2165 /* do a quick consistency check on the "function" object, and if it isn't */
2166 /* for us, divert to the real entersub */
2167 if (SvTYPE (gv) != SVt_PVGV
2168 || !GvCV (gv)
2169 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2170 return PL_ppaddr[OP_ENTERSUB](aTHX);
2171
2172 if (!(PL_op->op_flags & OPf_STACKED))
2173 {
2174 /* ampersand-form of call, use @_ instead of stack */
2175 AV *av = GvAV (PL_defgv);
2176 arg = AvARRAY (av);
2177 items = AvFILLp (av) + 1;
2178 }
2179
2180 /* now call the init function, which needs to set up slf_frame */
2181 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2182 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2183
2184 /* pop args */
2185 SP = PL_stack_base + POPMARK;
2186
2187 PUTBACK;
2188 }
2189
2190 /* now that we have a slf_frame, interpret it! */
2191 /* we use a callback system not to make the code needlessly */
2192 /* complicated, but so we can run multiple perl coros from one cctx */
2193
2194 do
2195 {
974 struct transfer_args ta; 2196 struct coro_transfer_args ta;
975 2197
976 prepare_schedule (&ta); 2198 slf_frame.prepare (aTHX_ &ta);
977 TRANSFER (ta); 2199 TRANSFER (ta, 0);
978}
979 2200
2201 checkmark = PL_stack_sp - PL_stack_base;
2202 }
2203 while (slf_frame.check (aTHX_ &slf_frame));
2204
2205 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2206
2207 /* exception handling */
2208 if (expect_false (CORO_THROW))
2209 {
2210 SV *exception = sv_2mortal (CORO_THROW);
2211
2212 CORO_THROW = 0;
2213 sv_setsv (ERRSV, exception);
2214 croak (0);
2215 }
2216
2217 /* return value handling - mostly like entersub */
2218 /* make sure we put something on the stack in scalar context */
2219 if (GIMME_V == G_SCALAR)
2220 {
2221 dSP;
2222 SV **bot = PL_stack_base + checkmark;
2223
2224 if (sp == bot) /* too few, push undef */
2225 bot [1] = &PL_sv_undef;
2226 else if (sp != bot + 1) /* too many, take last one */
2227 bot [1] = *sp;
2228
2229 SP = bot + 1;
2230
2231 PUTBACK;
2232 }
2233
2234 return NORMAL;
2235}
2236
2237static void
2238api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2239{
2240 int i;
2241 SV **arg = PL_stack_base + ax;
2242 int items = PL_stack_sp - arg + 1;
2243
2244 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2245
2246 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2247 && PL_op->op_ppaddr != pp_slf)
2248 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2249
2250 CvFLAGS (cv) |= CVf_SLF;
2251 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2252 slf_cv = cv;
2253
2254 /* we patch the op, and then re-run the whole call */
2255 /* we have to put the same argument on the stack for this to work */
2256 /* and this will be done by pp_restore */
2257 slf_restore.op_next = (OP *)&slf_restore;
2258 slf_restore.op_type = OP_CUSTOM;
2259 slf_restore.op_ppaddr = pp_restore;
2260 slf_restore.op_first = PL_op;
2261
2262 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2263
2264 if (PL_op->op_flags & OPf_STACKED)
2265 {
2266 if (items > slf_arga)
2267 {
2268 slf_arga = items;
2269 free (slf_argv);
2270 slf_argv = malloc (slf_arga * sizeof (SV *));
2271 }
2272
2273 slf_argc = items;
2274
2275 for (i = 0; i < items; ++i)
2276 slf_argv [i] = SvREFCNT_inc (arg [i]);
2277 }
2278 else
2279 slf_argc = 0;
2280
2281 PL_op->op_ppaddr = pp_slf;
2282 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2283
2284 PL_op = (OP *)&slf_restore;
2285}
2286
2287/*****************************************************************************/
2288/* PerlIO::cede */
2289
2290typedef struct
2291{
2292 PerlIOBuf base;
2293 NV next, every;
2294} PerlIOCede;
2295
2296static IV
2297PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2298{
2299 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2300
2301 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2302 self->next = nvtime () + self->every;
2303
2304 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2305}
2306
2307static SV *
2308PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2309{
2310 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2311
2312 return newSVnv (self->every);
2313}
2314
2315static IV
2316PerlIOCede_flush (pTHX_ PerlIO *f)
2317{
2318 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2319 double now = nvtime ();
2320
2321 if (now >= self->next)
2322 {
2323 api_cede (aTHX);
2324 self->next = now + self->every;
2325 }
2326
2327 return PerlIOBuf_flush (aTHX_ f);
2328}
2329
2330static PerlIO_funcs PerlIO_cede =
2331{
2332 sizeof(PerlIO_funcs),
2333 "cede",
2334 sizeof(PerlIOCede),
2335 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2336 PerlIOCede_pushed,
2337 PerlIOBuf_popped,
2338 PerlIOBuf_open,
2339 PerlIOBase_binmode,
2340 PerlIOCede_getarg,
2341 PerlIOBase_fileno,
2342 PerlIOBuf_dup,
2343 PerlIOBuf_read,
2344 PerlIOBuf_unread,
2345 PerlIOBuf_write,
2346 PerlIOBuf_seek,
2347 PerlIOBuf_tell,
2348 PerlIOBuf_close,
2349 PerlIOCede_flush,
2350 PerlIOBuf_fill,
2351 PerlIOBase_eof,
2352 PerlIOBase_error,
2353 PerlIOBase_clearerr,
2354 PerlIOBase_setlinebuf,
2355 PerlIOBuf_get_base,
2356 PerlIOBuf_bufsiz,
2357 PerlIOBuf_get_ptr,
2358 PerlIOBuf_get_cnt,
2359 PerlIOBuf_set_ptrcnt,
2360};
2361
2362/*****************************************************************************/
2363/* Coro::Semaphore & Coro::Signal */
2364
2365static SV *
2366coro_waitarray_new (pTHX_ int count)
2367{
2368 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2369 AV *av = newAV ();
2370 SV **ary;
2371
2372 /* unfortunately, building manually saves memory */
2373 Newx (ary, 2, SV *);
2374 AvALLOC (av) = ary;
2375#if PERL_VERSION_ATLEAST (5,10,0)
2376 AvARRAY (av) = ary;
2377#else
2378 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2379 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2380 SvPVX ((SV *)av) = (char *)ary;
2381#endif
2382 AvMAX (av) = 1;
2383 AvFILLp (av) = 0;
2384 ary [0] = newSViv (count);
2385
2386 return newRV_noinc ((SV *)av);
2387}
2388
2389/* semaphore */
2390
2391static void
2392coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2393{
2394 SV *count_sv = AvARRAY (av)[0];
2395 IV count = SvIVX (count_sv);
2396
2397 count += adjust;
2398 SvIVX (count_sv) = count;
2399
2400 /* now wake up as many waiters as are expected to lock */
2401 while (count > 0 && AvFILLp (av) > 0)
2402 {
2403 SV *cb;
2404
2405 /* swap first two elements so we can shift a waiter */
2406 AvARRAY (av)[0] = AvARRAY (av)[1];
2407 AvARRAY (av)[1] = count_sv;
2408 cb = av_shift (av);
2409
2410 if (SvOBJECT (cb))
2411 {
2412 api_ready (aTHX_ cb);
2413 --count;
2414 }
2415 else if (SvTYPE (cb) == SVt_PVCV)
2416 {
2417 dSP;
2418 PUSHMARK (SP);
2419 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2420 PUTBACK;
2421 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2422 }
2423
2424 SvREFCNT_dec (cb);
2425 }
2426}
2427
2428static void
2429coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2430{
2431 /* call $sem->adjust (0) to possibly wake up some other waiters */
2432 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2433}
2434
980static void 2435static int
981api_cede (void) 2436slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
982{ 2437{
983 dTHX; 2438 AV *av = (AV *)frame->data;
984 struct transfer_args ta; 2439 SV *count_sv = AvARRAY (av)[0];
985 2440
986 prepare_cede (&ta); 2441 /* if we are about to throw, don't actually acquire the lock, just throw */
987 TRANSFER (ta); 2442 if (CORO_THROW)
988} 2443 return 0;
2444 else if (SvIVX (count_sv) > 0)
2445 {
2446 SvSTATE_current->on_destroy = 0;
989 2447
2448 if (acquire)
2449 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2450 else
2451 coro_semaphore_adjust (aTHX_ av, 0);
2452
2453 return 0;
2454 }
2455 else
2456 {
2457 int i;
2458 /* if we were woken up but can't down, we look through the whole */
2459 /* waiters list and only add us if we aren't in there already */
2460 /* this avoids some degenerate memory usage cases */
2461
2462 for (i = 1; i <= AvFILLp (av); ++i)
2463 if (AvARRAY (av)[i] == SvRV (coro_current))
2464 return 1;
2465
2466 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2467 return 1;
2468 }
2469}
2470
2471static int
2472slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2473{
2474 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2475}
2476
2477static int
2478slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2479{
2480 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2481}
2482
2483static void
2484slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2485{
2486 AV *av = (AV *)SvRV (arg [0]);
2487
2488 if (SvIVX (AvARRAY (av)[0]) > 0)
2489 {
2490 frame->data = (void *)av;
2491 frame->prepare = prepare_nop;
2492 }
2493 else
2494 {
2495 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2496
2497 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2498 frame->prepare = prepare_schedule;
2499
2500 /* to avoid race conditions when a woken-up coro gets terminated */
2501 /* we arrange for a temporary on_destroy that calls adjust (0) */
2502 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2503 }
2504}
2505
2506static void
2507slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2508{
2509 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2510 frame->check = slf_check_semaphore_down;
2511}
2512
2513static void
2514slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2515{
2516 if (items >= 2)
2517 {
2518 /* callback form */
2519 AV *av = (AV *)SvRV (arg [0]);
2520 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2521
2522 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2523
2524 if (SvIVX (AvARRAY (av)[0]) > 0)
2525 coro_semaphore_adjust (aTHX_ av, 0);
2526
2527 frame->prepare = prepare_nop;
2528 frame->check = slf_check_nop;
2529 }
2530 else
2531 {
2532 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2533 frame->check = slf_check_semaphore_wait;
2534 }
2535}
2536
2537/* signal */
2538
2539static void
2540coro_signal_wake (pTHX_ AV *av, int count)
2541{
2542 SvIVX (AvARRAY (av)[0]) = 0;
2543
2544 /* now signal count waiters */
2545 while (count > 0 && AvFILLp (av) > 0)
2546 {
2547 SV *cb;
2548
2549 /* swap first two elements so we can shift a waiter */
2550 cb = AvARRAY (av)[0];
2551 AvARRAY (av)[0] = AvARRAY (av)[1];
2552 AvARRAY (av)[1] = cb;
2553
2554 cb = av_shift (av);
2555
2556 api_ready (aTHX_ cb);
2557 sv_setiv (cb, 0); /* signal waiter */
2558 SvREFCNT_dec (cb);
2559
2560 --count;
2561 }
2562}
2563
2564static int
2565slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2566{
2567 /* if we are about to throw, also stop waiting */
2568 return SvROK ((SV *)frame->data) && !CORO_THROW;
2569}
2570
2571static void
2572slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2573{
2574 AV *av = (AV *)SvRV (arg [0]);
2575
2576 if (SvIVX (AvARRAY (av)[0]))
2577 {
2578 SvIVX (AvARRAY (av)[0]) = 0;
2579 frame->prepare = prepare_nop;
2580 frame->check = slf_check_nop;
2581 }
2582 else
2583 {
2584 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2585
2586 av_push (av, waiter);
2587
2588 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2589 frame->prepare = prepare_schedule;
2590 frame->check = slf_check_signal_wait;
2591 }
2592}
2593
2594/*****************************************************************************/
2595/* Coro::AIO */
2596
2597#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2598
2599/* helper storage struct */
2600struct io_state
2601{
2602 int errorno;
2603 I32 laststype; /* U16 in 5.10.0 */
2604 int laststatval;
2605 Stat_t statcache;
2606};
2607
2608static void
2609coro_aio_callback (pTHX_ CV *cv)
2610{
2611 dXSARGS;
2612 AV *state = (AV *)GENSUB_ARG;
2613 SV *coro = av_pop (state);
2614 SV *data_sv = newSV (sizeof (struct io_state));
2615
2616 av_extend (state, items - 1);
2617
2618 sv_upgrade (data_sv, SVt_PV);
2619 SvCUR_set (data_sv, sizeof (struct io_state));
2620 SvPOK_only (data_sv);
2621
2622 {
2623 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2624
2625 data->errorno = errno;
2626 data->laststype = PL_laststype;
2627 data->laststatval = PL_laststatval;
2628 data->statcache = PL_statcache;
2629 }
2630
2631 /* now build the result vector out of all the parameters and the data_sv */
2632 {
2633 int i;
2634
2635 for (i = 0; i < items; ++i)
2636 av_push (state, SvREFCNT_inc_NN (ST (i)));
2637 }
2638
2639 av_push (state, data_sv);
2640
2641 api_ready (aTHX_ coro);
2642 SvREFCNT_dec (coro);
2643 SvREFCNT_dec ((AV *)state);
2644}
2645
2646static int
2647slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2648{
2649 AV *state = (AV *)frame->data;
2650
2651 /* if we are about to throw, return early */
2652 /* this does not cancel the aio request, but at least */
2653 /* it quickly returns */
2654 if (CORO_THROW)
2655 return 0;
2656
2657 /* one element that is an RV? repeat! */
2658 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2659 return 1;
2660
2661 /* restore status */
2662 {
2663 SV *data_sv = av_pop (state);
2664 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2665
2666 errno = data->errorno;
2667 PL_laststype = data->laststype;
2668 PL_laststatval = data->laststatval;
2669 PL_statcache = data->statcache;
2670
2671 SvREFCNT_dec (data_sv);
2672 }
2673
2674 /* push result values */
2675 {
2676 dSP;
2677 int i;
2678
2679 EXTEND (SP, AvFILLp (state) + 1);
2680 for (i = 0; i <= AvFILLp (state); ++i)
2681 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2682
2683 PUTBACK;
2684 }
2685
2686 return 0;
2687}
2688
2689static void
2690slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2691{
2692 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2693 SV *coro_hv = SvRV (coro_current);
2694 struct coro *coro = SvSTATE_hv (coro_hv);
2695
2696 /* put our coroutine id on the state arg */
2697 av_push (state, SvREFCNT_inc_NN (coro_hv));
2698
2699 /* first see whether we have a non-zero priority and set it as AIO prio */
2700 if (coro->prio)
2701 {
2702 dSP;
2703
2704 static SV *prio_cv;
2705 static SV *prio_sv;
2706
2707 if (expect_false (!prio_cv))
2708 {
2709 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2710 prio_sv = newSViv (0);
2711 }
2712
2713 PUSHMARK (SP);
2714 sv_setiv (prio_sv, coro->prio);
2715 XPUSHs (prio_sv);
2716
2717 PUTBACK;
2718 call_sv (prio_cv, G_VOID | G_DISCARD);
2719 }
2720
2721 /* now call the original request */
2722 {
2723 dSP;
2724 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2725 int i;
2726
2727 PUSHMARK (SP);
2728
2729 /* first push all args to the stack */
2730 EXTEND (SP, items + 1);
2731
2732 for (i = 0; i < items; ++i)
2733 PUSHs (arg [i]);
2734
2735 /* now push the callback closure */
2736 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2737
2738 /* now call the AIO function - we assume our request is uncancelable */
2739 PUTBACK;
2740 call_sv ((SV *)req, G_VOID | G_DISCARD);
2741 }
2742
2743 /* now that the requets is going, we loop toll we have a result */
2744 frame->data = (void *)state;
2745 frame->prepare = prepare_schedule;
2746 frame->check = slf_check_aio_req;
2747}
2748
2749static void
2750coro_aio_req_xs (pTHX_ CV *cv)
2751{
2752 dXSARGS;
2753
2754 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2755
2756 XSRETURN_EMPTY;
2757}
2758
2759/*****************************************************************************/
2760
2761#if CORO_CLONE
2762# include "clone.c"
2763#endif
2764
990MODULE = Coro::State PACKAGE = Coro::State 2765MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 2766
992PROTOTYPES: DISABLE 2767PROTOTYPES: DISABLE
993 2768
994BOOT: 2769BOOT:
995{ 2770{
996#ifdef USE_ITHREADS 2771#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 2772# if CORO_PTHREAD
2773 coro_thx = PERL_GET_CONTEXT;
2774# endif
998#endif 2775#endif
999 BOOT_PAGESIZE; 2776 BOOT_PAGESIZE;
1000 2777
2778 cctx_current = cctx_new_empty ();
2779
2780 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2781 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2782
2783 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2784 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2785 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2786
2787 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2788 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2789 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2790
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2791 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 2792
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2793 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2794 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2795 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2796 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006 2797
1007 main_mainstack = PL_mainstack; 2798 main_mainstack = PL_mainstack;
2799 main_top_env = PL_top_env;
1008 2800
2801 while (main_top_env->je_prev)
2802 main_top_env = main_top_env->je_prev;
2803
2804 {
2805 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2806
2807 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2808 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2809
2810 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2811 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2812 }
2813
1009 coroapi.ver = CORO_API_VERSION; 2814 coroapi.ver = CORO_API_VERSION;
2815 coroapi.rev = CORO_API_REVISION;
2816
1010 coroapi.transfer = api_transfer; 2817 coroapi.transfer = api_transfer;
2818
2819 coroapi.sv_state = SvSTATE_;
2820 coroapi.execute_slf = api_execute_slf;
2821 coroapi.prepare_nop = prepare_nop;
2822 coroapi.prepare_schedule = prepare_schedule;
2823 coroapi.prepare_cede = prepare_cede;
2824 coroapi.prepare_cede_notself = prepare_cede_notself;
2825
2826 {
2827 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2828
2829 if (!svp) croak ("Time::HiRes is required");
2830 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2831
2832 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2833 }
1011 2834
1012 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2835 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1013} 2836}
1014 2837
1015SV * 2838SV *
1016new (char *klass, ...) 2839new (char *klass, ...)
2840 ALIAS:
2841 Coro::new = 1
1017 CODE: 2842 CODE:
1018{ 2843{
1019 struct coro *coro; 2844 struct coro *coro;
2845 MAGIC *mg;
1020 HV *hv; 2846 HV *hv;
2847 CV *cb;
1021 int i; 2848 int i;
1022 2849
2850 if (items > 1)
2851 {
2852 cb = coro_sv_2cv (aTHX_ ST (1));
2853
2854 if (!ix)
2855 {
2856 if (CvISXSUB (cb))
2857 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2858
2859 if (!CvROOT (cb))
2860 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2861 }
2862 }
2863
1023 Newz (0, coro, 1, struct coro); 2864 Newz (0, coro, 1, struct coro);
1024 coro->args = newAV (); 2865 coro->args = newAV ();
2866 coro->flags = CF_NEW;
1025 2867
2868 if (coro_first) coro_first->prev = coro;
2869 coro->next = coro_first;
2870 coro_first = coro;
2871
1026 hv = newHV (); 2872 coro->hv = hv = newHV ();
1027 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2873 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2874 mg->mg_flags |= MGf_DUP;
1028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2875 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029 2876
2877 if (items > 1)
2878 {
2879 av_extend (coro->args, items - 1 + ix - 1);
2880
2881 if (ix)
2882 {
2883 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2884 cb = cv_coro_run;
2885 }
2886
2887 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2888
1030 for (i = 1; i < items; i++) 2889 for (i = 2; i < items; i++)
1031 av_push (coro->args, newSVsv (ST (i))); 2890 av_push (coro->args, newSVsv (ST (i)));
1032 2891 }
1033 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1034 /*coro->stack = 0;*/
1035} 2892}
1036 OUTPUT: 2893 OUTPUT:
1037 RETVAL 2894 RETVAL
1038 2895
1039void 2896void
1040_set_stacklevel (...) 2897transfer (...)
1041 ALIAS: 2898 PROTOTYPE: $$
1042 Coro::State::transfer = 1 2899 CODE:
1043 Coro::schedule = 2 2900 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1044 Coro::cede = 3
1045 Coro::Cont::yield = 4
1046 CODE:
1047{
1048 struct transfer_args ta;
1049 2901
1050 switch (ix) 2902bool
1051 { 2903_destroy (SV *coro_sv)
1052 case 0: 2904 CODE:
1053 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 2905 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1054 ta.next = 0; 2906 OUTPUT:
1055 ta.flags = TRANSFER_SET_STACKLEVEL; 2907 RETVAL
1056 break;
1057
1058 case 1:
1059 if (items != 3)
1060 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1061
1062 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1063 break;
1064
1065 case 2:
1066 prepare_schedule (&ta);
1067 break;
1068
1069 case 3:
1070 prepare_cede (&ta);
1071 break;
1072
1073 case 4:
1074 {
1075 SV *yieldstack;
1076 SV *sv;
1077 AV *defav = GvAV (PL_defgv);
1078
1079 yieldstack = *hv_fetch (
1080 (HV *)SvRV (GvSV (coro_current)),
1081 "yieldstack", sizeof ("yieldstack") - 1,
1082 0
1083 );
1084
1085 /* set up @_ -- ugly */
1086 av_clear (defav);
1087 av_fill (defav, items - 1);
1088 while (items--)
1089 av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091 sv = av_pop ((AV *)SvRV (yieldstack));
1092 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094 ta.flags = 0;
1095 SvREFCNT_dec (sv);
1096 }
1097 break;
1098
1099 }
1100
1101 TRANSFER (ta);
1102}
1103 2908
1104void 2909void
1105_clone_state_from (SV *dst, SV *src)
1106 CODE:
1107{
1108 struct coro *coro_src = SvSTATE (src);
1109
1110 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112 ++coro_src->refcnt;
1113 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114}
1115
1116void
1117_nonlocal_goto (IV nextop)
1118 CODE:
1119 /* uuh, somebody will kill me again for this */
1120 PL_op->op_next = INT2PTR (OP *, nextop);
1121
1122void
1123_exit (code) 2910_exit (int code)
1124 int code
1125 PROTOTYPE: $ 2911 PROTOTYPE: $
1126 CODE: 2912 CODE:
1127 _exit (code); 2913 _exit (code);
1128 2914
2915SV *
2916clone (Coro::State coro)
2917 CODE:
2918{
2919#if CORO_CLONE
2920 struct coro *ncoro = coro_clone (coro);
2921 MAGIC *mg;
2922 /* TODO: too much duplication */
2923 ncoro->hv = newHV ();
2924 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2925 mg->mg_flags |= MGf_DUP;
2926 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2927#else
2928 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2929#endif
2930}
2931 OUTPUT:
2932 RETVAL
2933
2934int
2935cctx_stacksize (int new_stacksize = 0)
2936 PROTOTYPE: ;$
2937 CODE:
2938 RETVAL = cctx_stacksize;
2939 if (new_stacksize)
2940 {
2941 cctx_stacksize = new_stacksize;
2942 ++cctx_gen;
2943 }
2944 OUTPUT:
2945 RETVAL
2946
2947int
2948cctx_max_idle (int max_idle = 0)
2949 PROTOTYPE: ;$
2950 CODE:
2951 RETVAL = cctx_max_idle;
2952 if (max_idle > 1)
2953 cctx_max_idle = max_idle;
2954 OUTPUT:
2955 RETVAL
2956
2957int
2958cctx_count ()
2959 PROTOTYPE:
2960 CODE:
2961 RETVAL = cctx_count;
2962 OUTPUT:
2963 RETVAL
2964
2965int
2966cctx_idle ()
2967 PROTOTYPE:
2968 CODE:
2969 RETVAL = cctx_idle;
2970 OUTPUT:
2971 RETVAL
2972
2973void
2974list ()
2975 PROTOTYPE:
2976 PPCODE:
2977{
2978 struct coro *coro;
2979 for (coro = coro_first; coro; coro = coro->next)
2980 if (coro->hv)
2981 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2982}
2983
2984void
2985call (Coro::State coro, SV *coderef)
2986 ALIAS:
2987 eval = 1
2988 CODE:
2989{
2990 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2991 {
2992 struct coro temp;
2993
2994 if (!(coro->flags & CF_RUNNING))
2995 {
2996 PUTBACK;
2997 save_perl (aTHX_ &temp);
2998 load_perl (aTHX_ coro);
2999 }
3000
3001 {
3002 dSP;
3003 ENTER;
3004 SAVETMPS;
3005 PUTBACK;
3006 PUSHSTACK;
3007 PUSHMARK (SP);
3008
3009 if (ix)
3010 eval_sv (coderef, 0);
3011 else
3012 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3013
3014 POPSTACK;
3015 SPAGAIN;
3016 FREETMPS;
3017 LEAVE;
3018 PUTBACK;
3019 }
3020
3021 if (!(coro->flags & CF_RUNNING))
3022 {
3023 save_perl (aTHX_ coro);
3024 load_perl (aTHX_ &temp);
3025 SPAGAIN;
3026 }
3027 }
3028}
3029
3030SV *
3031is_ready (Coro::State coro)
3032 PROTOTYPE: $
3033 ALIAS:
3034 is_ready = CF_READY
3035 is_running = CF_RUNNING
3036 is_new = CF_NEW
3037 is_destroyed = CF_DESTROYED
3038 CODE:
3039 RETVAL = boolSV (coro->flags & ix);
3040 OUTPUT:
3041 RETVAL
3042
3043void
3044throw (Coro::State self, SV *throw = &PL_sv_undef)
3045 PROTOTYPE: $;$
3046 CODE:
3047{
3048 struct coro *current = SvSTATE_current;
3049 SV **throwp = self == current ? &CORO_THROW : &self->except;
3050 SvREFCNT_dec (*throwp);
3051 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3052}
3053
3054void
3055api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3056 PROTOTYPE: $;$
3057 C_ARGS: aTHX_ coro, flags
3058
3059SV *
3060has_cctx (Coro::State coro)
3061 PROTOTYPE: $
3062 CODE:
3063 /* maybe manage the running flag differently */
3064 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3065 OUTPUT:
3066 RETVAL
3067
3068int
3069is_traced (Coro::State coro)
3070 PROTOTYPE: $
3071 CODE:
3072 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3073 OUTPUT:
3074 RETVAL
3075
3076UV
3077rss (Coro::State coro)
3078 PROTOTYPE: $
3079 ALIAS:
3080 usecount = 1
3081 CODE:
3082 switch (ix)
3083 {
3084 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3085 case 1: RETVAL = coro->usecount; break;
3086 }
3087 OUTPUT:
3088 RETVAL
3089
3090void
3091force_cctx ()
3092 PROTOTYPE:
3093 CODE:
3094 cctx_current->idle_sp = 0;
3095
3096void
3097swap_defsv (Coro::State self)
3098 PROTOTYPE: $
3099 ALIAS:
3100 swap_defav = 1
3101 CODE:
3102 if (!self->slot)
3103 croak ("cannot swap state with coroutine that has no saved state,");
3104 else
3105 {
3106 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3107 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3108
3109 SV *tmp = *src; *src = *dst; *dst = tmp;
3110 }
3111
3112
1129MODULE = Coro::State PACKAGE = Coro 3113MODULE = Coro::State PACKAGE = Coro
1130 3114
1131BOOT: 3115BOOT:
1132{ 3116{
1133 int i; 3117 int i;
1134 3118
3119 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3120 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3121 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3122 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3123 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3124 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3125 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3126 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3127 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3128
3129 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3130 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3131 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3132 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3133
1135 coro_stash = gv_stashpv ("Coro", TRUE); 3134 coro_stash = gv_stashpv ("Coro", TRUE);
1136 3135
1137 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3136 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3137 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3138 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3139 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3140 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3141 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143 3142
1144 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3143 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148 coro_ready[i] = newAV (); 3144 coro_ready[i] = newAV ();
1149 3145
1150 { 3146 {
1151 SV *sv = perl_get_sv("Coro::API", 1); 3147 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1152 3148
1153 coroapi.schedule = api_schedule; 3149 coroapi.schedule = api_schedule;
3150 coroapi.schedule_to = api_schedule_to;
1154 coroapi.cede = api_cede; 3151 coroapi.cede = api_cede;
3152 coroapi.cede_notself = api_cede_notself;
1155 coroapi.ready = api_ready; 3153 coroapi.ready = api_ready;
3154 coroapi.is_ready = api_is_ready;
1156 coroapi.nready = &coro_nready; 3155 coroapi.nready = coro_nready;
1157 coroapi.current = coro_current; 3156 coroapi.current = coro_current;
1158 3157
1159 GCoroAPI = &coroapi; 3158 /*GCoroAPI = &coroapi;*/
1160 sv_setiv (sv, (IV)&coroapi); 3159 sv_setiv (sv, (IV)&coroapi);
1161 SvREADONLY_on (sv); 3160 SvREADONLY_on (sv);
1162 } 3161 }
1163} 3162}
1164 3163
3164void
3165terminate (...)
3166 CODE:
3167 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3168
3169void
3170schedule (...)
3171 CODE:
3172 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3173
3174void
3175schedule_to (...)
3176 CODE:
3177 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3178
3179void
3180cede_to (...)
3181 CODE:
3182 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3183
3184void
3185cede (...)
3186 CODE:
3187 CORO_EXECUTE_SLF_XS (slf_init_cede);
3188
3189void
3190cede_notself (...)
3191 CODE:
3192 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3193
3194void
3195_cancel (Coro::State self)
3196 CODE:
3197 coro_state_destroy (aTHX_ self);
3198 coro_call_on_destroy (aTHX_ self);
3199
3200void
3201_set_current (SV *current)
3202 PROTOTYPE: $
3203 CODE:
3204 SvREFCNT_dec (SvRV (coro_current));
3205 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3206
3207void
3208_set_readyhook (SV *hook)
3209 PROTOTYPE: $
3210 CODE:
3211 SvREFCNT_dec (coro_readyhook);
3212 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3213
1165int 3214int
1166prio (Coro::State coro, int newprio = 0) 3215prio (Coro::State coro, int newprio = 0)
3216 PROTOTYPE: $;$
1167 ALIAS: 3217 ALIAS:
1168 nice = 1 3218 nice = 1
1169 CODE: 3219 CODE:
1170{ 3220{
1171 RETVAL = coro->prio; 3221 RETVAL = coro->prio;
1172 3222
1173 if (items > 1) 3223 if (items > 1)
1174 { 3224 {
1175 if (ix) 3225 if (ix)
1176 newprio += coro->prio; 3226 newprio = coro->prio - newprio;
1177 3227
1178 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3228 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3229 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180 3230
1181 coro->prio = newprio; 3231 coro->prio = newprio;
1182 } 3232 }
1183} 3233}
3234 OUTPUT:
3235 RETVAL
1184 3236
1185void 3237SV *
1186ready (SV *self) 3238ready (SV *self)
1187 PROTOTYPE: $ 3239 PROTOTYPE: $
1188 CODE: 3240 CODE:
1189 api_ready (self); 3241 RETVAL = boolSV (api_ready (aTHX_ self));
3242 OUTPUT:
3243 RETVAL
1190 3244
1191int 3245int
1192nready (...) 3246nready (...)
1193 PROTOTYPE: 3247 PROTOTYPE:
1194 CODE: 3248 CODE:
1195 RETVAL = coro_nready; 3249 RETVAL = coro_nready;
1196 OUTPUT: 3250 OUTPUT:
1197 RETVAL 3251 RETVAL
1198 3252
1199MODULE = Coro::State PACKAGE = Coro::AIO 3253void
3254_pool_handler (...)
3255 CODE:
3256 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3257
3258void
3259async_pool (SV *cv, ...)
3260 PROTOTYPE: &@
3261 PPCODE:
3262{
3263 HV *hv = (HV *)av_pop (av_async_pool);
3264 AV *av = newAV ();
3265 SV *cb = ST (0);
3266 int i;
3267
3268 av_extend (av, items - 2);
3269 for (i = 1; i < items; ++i)
3270 av_push (av, SvREFCNT_inc_NN (ST (i)));
3271
3272 if ((SV *)hv == &PL_sv_undef)
3273 {
3274 PUSHMARK (SP);
3275 EXTEND (SP, 2);
3276 PUSHs (sv_Coro);
3277 PUSHs ((SV *)cv_pool_handler);
3278 PUTBACK;
3279 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3280 SPAGAIN;
3281
3282 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3283 }
3284
3285 {
3286 struct coro *coro = SvSTATE_hv (hv);
3287
3288 assert (!coro->invoke_cb);
3289 assert (!coro->invoke_av);
3290 coro->invoke_cb = SvREFCNT_inc (cb);
3291 coro->invoke_av = av;
3292 }
3293
3294 api_ready (aTHX_ (SV *)hv);
3295
3296 if (GIMME_V != G_VOID)
3297 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3298 else
3299 SvREFCNT_dec (hv);
3300}
1200 3301
1201SV * 3302SV *
1202_get_state () 3303rouse_cb ()
3304 PROTOTYPE:
1203 CODE: 3305 CODE:
1204{ 3306 RETVAL = coro_new_rouse_cb (aTHX);
1205 struct {
1206 int errorno;
1207 int laststype;
1208 int laststatval;
1209 Stat_t statcache;
1210 } data;
1211
1212 data.errorno = errno;
1213 data.laststype = PL_laststype;
1214 data.laststatval = PL_laststatval;
1215 data.statcache = PL_statcache;
1216
1217 RETVAL = newSVpvn ((char *)&data, sizeof data);
1218}
1219 OUTPUT: 3307 OUTPUT:
1220 RETVAL 3308 RETVAL
1221 3309
1222void 3310void
1223_set_state (char *data_) 3311rouse_wait (...)
1224 PROTOTYPE: $ 3312 PROTOTYPE: ;$
3313 PPCODE:
3314 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3315
3316
3317MODULE = Coro::State PACKAGE = PerlIO::cede
3318
3319BOOT:
3320 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3321
3322
3323MODULE = Coro::State PACKAGE = Coro::Semaphore
3324
3325SV *
3326new (SV *klass, SV *count = 0)
1225 CODE: 3327 CODE:
3328 RETVAL = sv_bless (
3329 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3330 GvSTASH (CvGV (cv))
3331 );
3332 OUTPUT:
3333 RETVAL
3334
3335# helper for Coro::Channel
3336SV *
3337_alloc (int count)
3338 CODE:
3339 RETVAL = coro_waitarray_new (aTHX_ count);
3340 OUTPUT:
3341 RETVAL
3342
3343SV *
3344count (SV *self)
3345 CODE:
3346 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3347 OUTPUT:
3348 RETVAL
3349
3350void
3351up (SV *self, int adjust = 1)
3352 ALIAS:
3353 adjust = 1
3354 CODE:
3355 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3356
3357void
3358down (...)
3359 CODE:
3360 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3361
3362void
3363wait (...)
3364 CODE:
3365 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3366
3367void
3368try (SV *self)
3369 PPCODE:
1226{ 3370{
1227 struct { 3371 AV *av = (AV *)SvRV (self);
3372 SV *count_sv = AvARRAY (av)[0];
3373 IV count = SvIVX (count_sv);
3374
3375 if (count > 0)
3376 {
3377 --count;
3378 SvIVX (count_sv) = count;
3379 XSRETURN_YES;
3380 }
3381 else
3382 XSRETURN_NO;
3383}
3384
3385void
3386waiters (SV *self)
3387 PPCODE:
3388{
3389 AV *av = (AV *)SvRV (self);
3390 int wcount = AvFILLp (av) + 1 - 1;
3391
3392 if (GIMME_V == G_SCALAR)
3393 XPUSHs (sv_2mortal (newSViv (wcount)));
3394 else
3395 {
1228 int errorno; 3396 int i;
1229 int laststype; 3397 EXTEND (SP, wcount);
1230 int laststatval; 3398 for (i = 1; i <= wcount; ++i)
1231 Stat_t statcache; 3399 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1232 } *data = (void *)data_; 3400 }
1233
1234 errno = data->errorno;
1235 PL_laststype = data->laststype;
1236 PL_laststatval = data->laststatval;
1237 PL_statcache = data->statcache;
1238} 3401}
3402
3403MODULE = Coro::State PACKAGE = Coro::Signal
3404
3405SV *
3406new (SV *klass)
3407 CODE:
3408 RETVAL = sv_bless (
3409 coro_waitarray_new (aTHX_ 0),
3410 GvSTASH (CvGV (cv))
3411 );
3412 OUTPUT:
3413 RETVAL
3414
3415void
3416wait (...)
3417 CODE:
3418 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3419
3420void
3421broadcast (SV *self)
3422 CODE:
3423{
3424 AV *av = (AV *)SvRV (self);
3425 coro_signal_wake (aTHX_ av, AvFILLp (av));
3426}
3427
3428void
3429send (SV *self)
3430 CODE:
3431{
3432 AV *av = (AV *)SvRV (self);
3433
3434 if (AvFILLp (av))
3435 coro_signal_wake (aTHX_ av, 1);
3436 else
3437 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3438}
3439
3440IV
3441awaited (SV *self)
3442 CODE:
3443 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3444 OUTPUT:
3445 RETVAL
3446
3447
3448MODULE = Coro::State PACKAGE = Coro::AnyEvent
3449
3450BOOT:
3451 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3452
3453void
3454_schedule (...)
3455 CODE:
3456{
3457 static int incede;
3458
3459 api_cede_notself (aTHX);
3460
3461 ++incede;
3462 while (coro_nready >= incede && api_cede (aTHX))
3463 ;
3464
3465 sv_setsv (sv_activity, &PL_sv_undef);
3466 if (coro_nready >= incede)
3467 {
3468 PUSHMARK (SP);
3469 PUTBACK;
3470 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3471 }
3472
3473 --incede;
3474}
3475
3476
3477MODULE = Coro::State PACKAGE = Coro::AIO
3478
3479void
3480_register (char *target, char *proto, SV *req)
3481 CODE:
3482{
3483 CV *req_cv = coro_sv_2cv (aTHX_ req);
3484 /* newXSproto doesn't return the CV on 5.8 */
3485 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3486 sv_setpv ((SV *)slf_cv, proto);
3487 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3488}
3489

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