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Comparing Coro/Coro/State.xs (file contents):
Revision 1.96 by root, Sun Nov 26 18:25:11 2006 UTC vs.
Revision 1.325 by root, Sun Nov 23 06:48:45 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <stdio.h> 83/* 5.11 */
33#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
34 114
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD 116# undef CORO_STACKGUARD
37#endif 117#endif
38 118
39#ifndef STACKGUARD 119#ifndef CORO_STACKGUARD
40# define STACKGUARD 0 120# define CORO_STACKGUARD 0
41#endif
42
43#ifdef HAVE_MMAP
44# include <unistd.h>
45# include <sys/mman.h>
46# ifndef MAP_ANONYMOUS
47# ifdef MAP_ANON
48# define MAP_ANONYMOUS MAP_ANON
49# else
50# undef HAVE_MMAP
51# 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;
52# endif 161# endif
53# include <limits.h>
54# ifndef PAGESIZE
55# define PAGESIZE pagesize
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize;
58# else
59# define BOOT_PAGESIZE
60# endif 162#endif
61#endif
62 163
63/* The next macro should declare a variable stacklevel that contains and approximation 164static double (*nvtime)(); /* so why doesn't it take void? */
64 * to the current C stack pointer. Its property is that it changes with each call
65 * and should be unique. */
66#define dSTACKLEVEL int stacklevel
67#define STACKLEVEL ((void *)&stacklevel)
68 165
69#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);
70 169
71#include "CoroAPI.h" 170static U32 cctx_gen;
72 171static size_t cctx_stacksize = CORO_STACKSIZE;
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74
75#ifdef USE_ITHREADS
76static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else
80# define LOCK (void)0
81# define UNLOCK (void)0
82#endif
83
84static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
85static 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;
86static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
87static 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 */
180
181static GV *irsgv; /* $/ */
182static GV *stdoutgv; /* *STDOUT */
183static SV *rv_diehook;
184static SV *rv_warnhook;
185static HV *hv_sig; /* %SIG */
186
187/* async_pool helper stuff */
188static SV *sv_pool_rss;
189static SV *sv_pool_size;
190static SV *sv_async_pool_idle; /* description string */
191static AV *av_async_pool; /* idle pool */
192static SV *sv_Coro; /* class string */
193static CV *cv_pool_handler;
194static CV *cv_coro_state_new;
195
196/* Coro::AnyEvent */
197static SV *sv_activity;
198
199static struct coro_cctx *cctx_first;
200static int cctx_count, cctx_idle;
201
202enum {
203 CC_MAPPED = 0x01,
204 CC_NOREUSE = 0x02, /* throw this away after tracing */
205 CC_TRACE = 0x04,
206 CC_TRACE_SUB = 0x08, /* trace sub calls */
207 CC_TRACE_LINE = 0x10, /* trace each statement */
208 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
209};
88 210
89/* this is a structure representing a c-level coroutine */ 211/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 212typedef struct coro_cctx
213{
91 struct coro_stack *next; 214 struct coro_cctx *next;
92 215
93 /* the stack */ 216 /* the stack */
94 void *sptr; 217 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 218 size_t ssize;
96 219
97 /* cpu state */ 220 /* cpu state */
98 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 221 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
222 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99 JMPENV *top_env; 223 JMPENV *top_env;
100 coro_context cctx; 224 coro_context cctx;
101} coro_stack; 225
226 U32 gen;
227#if CORO_USE_VALGRIND
228 int valgrind_id;
229#endif
230 unsigned char flags;
231} coro_cctx;
232
233coro_cctx *cctx_current; /* the currently running cctx */
234
235/*****************************************************************************/
236
237enum {
238 CF_RUNNING = 0x0001, /* coroutine is running */
239 CF_READY = 0x0002, /* coroutine is ready */
240 CF_NEW = 0x0004, /* has never been switched to */
241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
242};
243
244/* the structure where most of the perl state is stored, overlaid on the cxstack */
245typedef struct
246{
247 SV *defsv;
248 AV *defav;
249 SV *errsv;
250 SV *irsgv;
251#define VAR(name,type) type name;
252# include "state.h"
253#undef VAR
254} perl_slots;
255
256#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
102 257
103/* this is a structure representing a perl-level coroutine */ 258/* this is a structure representing a perl-level coroutine */
104struct coro { 259struct coro {
105 /* the c coroutine allocated to this perl coroutine, if any */ 260 /* the C coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 261 coro_cctx *cctx;
107 262
108 /* data associated with this coroutine (initial args) */ 263 /* state data */
109 AV *args; 264 struct CoroSLF slf_frame; /* saved slf frame */
110 int refcnt;
111
112 /* optionally saved, might be zero */
113 AV *defav;
114 SV *defsv;
115 SV *errsv;
116
117 /* saved global state not related to stacks */
118 U8 dowarn;
119 I32 in_eval;
120
121 /* the stacks and related info (callchain etc..) */
122 PERL_SI *curstackinfo;
123 AV *curstack;
124 AV *mainstack; 265 AV *mainstack;
125 SV **stack_sp; 266 perl_slots *slot; /* basically the saved sp */
126 OP *op; 267
127 SV **curpad; 268 CV *startcv; /* the CV to execute */
128 AV *comppad; 269 AV *args; /* data associated with this coroutine (initial args) */
129 CV *compcv; 270 int refcnt; /* coroutines are refcounted, yes */
130 SV **stack_base; 271 int flags; /* CF_ flags */
131 SV **stack_max; 272 HV *hv; /* the perl hash associated with this coro, if any */
132 SV **tmps_stack; 273 void (*on_destroy)(pTHX_ struct coro *coro);
133 I32 tmps_floor; 274
134 I32 tmps_ix; 275 /* statistics */
135 I32 tmps_max; 276 int usecount; /* number of transfers to this coro */
136 I32 *markstack;
137 I32 *markstack_ptr;
138 I32 *markstack_max;
139 I32 *scopestack;
140 I32 scopestack_ix;
141 I32 scopestack_max;
142 ANY *savestack;
143 I32 savestack_ix;
144 I32 savestack_max;
145 OP **retstack;
146 I32 retstack_ix;
147 I32 retstack_max;
148 PMOP *curpm;
149 COP *curcop;
150 277
151 /* coro process data */ 278 /* coro process data */
152 int prio; 279 int prio;
280 SV *except; /* exception to be thrown */
281 SV *rouse_cb;
282
283 /* async_pool */
284 SV *saved_deffh;
285 SV *invoke_cb;
286 AV *invoke_av;
287
288 /* linked list */
289 struct coro *next, *prev;
153}; 290};
154 291
155typedef struct coro *Coro__State; 292typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 293typedef struct coro *Coro__State_or_hashref;
157 294
295/* the following variables are effectively part of the perl context */
296/* and get copied between struct coro and these variables */
297/* the mainr easonw e don't support windows process emulation */
298static struct CoroSLF slf_frame; /* the current slf frame */
299
300/** Coro ********************************************************************/
301
302#define PRIO_MAX 3
303#define PRIO_HIGH 1
304#define PRIO_NORMAL 0
305#define PRIO_LOW -1
306#define PRIO_IDLE -3
307#define PRIO_MIN -4
308
309/* for Coro.pm */
310static SV *coro_current;
311static SV *coro_readyhook;
312static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
313static CV *cv_coro_run, *cv_coro_terminate;
314static struct coro *coro_first;
315#define coro_nready coroapi.nready
316
317/** lowlevel stuff **********************************************************/
318
319static SV *
320coro_get_sv (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_sv (name, create);
325#endif
326 return get_sv (name, create);
327}
328
158static AV * 329static AV *
330coro_get_av (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_av (name, create);
335#endif
336 return get_av (name, create);
337}
338
339static HV *
340coro_get_hv (pTHX_ const char *name, int create)
341{
342#if PERL_VERSION_ATLEAST (5,10,0)
343 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
344 get_hv (name, create);
345#endif
346 return get_hv (name, create);
347}
348
349/* may croak */
350INLINE CV *
351coro_sv_2cv (pTHX_ SV *sv)
352{
353 HV *st;
354 GV *gvp;
355 return sv_2cv (sv, &st, &gvp, 0);
356}
357
358static AV *
159coro_clone_padlist (pTHX_ CV *cv) 359coro_derive_padlist (pTHX_ CV *cv)
160{ 360{
161 AV *padlist = CvPADLIST (cv); 361 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 362 AV *newpadlist, *newpad;
163 363
164 newpadlist = newAV (); 364 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 365 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 366#if PERL_VERSION_ATLEAST (5,10,0)
367 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
368#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 369 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 370#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 371 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 372 --AvFILLp (padlist);
173 373
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 374 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad); 375 av_store (newpadlist, 1, (SV *)newpad);
176 376
177 return newpadlist; 377 return newpadlist;
178} 378}
179 379
… …
209 409
210 /* casting is fun. */ 410 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 411 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 412 free_padlist (aTHX_ padlist);
213 413
214 SvREFCNT_dec (av); 414 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 415
216 return 0; 416 return 0;
217} 417}
218 418
419#define CORO_MAGIC_type_cv 26
219#define PERL_MAGIC_coro PERL_MAGIC_ext 420#define CORO_MAGIC_type_state PERL_MAGIC_ext
220 421
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 422static MGVTBL coro_cv_vtbl = {
423 0, 0, 0, 0,
424 coro_cv_free
425};
426
427#define CORO_MAGIC_NN(sv, type) \
428 (expect_true (SvMAGIC (sv)->mg_type == type) \
429 ? SvMAGIC (sv) \
430 : mg_find (sv, type))
431
432#define CORO_MAGIC(sv, type) \
433 (expect_true (SvMAGIC (sv)) \
434 ? CORO_MAGIC_NN (sv, type) \
435 : 0)
436
437#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
438#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
439
440INLINE struct coro *
441SvSTATE_ (pTHX_ SV *coro)
442{
443 HV *stash;
444 MAGIC *mg;
445
446 if (SvROK (coro))
447 coro = SvRV (coro);
448
449 if (expect_false (SvTYPE (coro) != SVt_PVHV))
450 croak ("Coro::State object required");
451
452 stash = SvSTASH (coro);
453 if (expect_false (stash != coro_stash && stash != coro_state_stash))
454 {
455 /* very slow, but rare, check */
456 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
457 croak ("Coro::State object required");
458 }
459
460 mg = CORO_MAGIC_state (coro);
461 return (struct coro *)mg->mg_ptr;
462}
463
464#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
465
466/* faster than SvSTATE, but expects a coroutine hv */
467#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
468#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
222 469
223/* the next two functions merely cache the padlists */ 470/* the next two functions merely cache the padlists */
224static void 471static void
225get_padlist (pTHX_ CV *cv) 472get_padlist (pTHX_ CV *cv)
226{ 473{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 474 MAGIC *mg = CORO_MAGIC_cv (cv);
475 AV *av;
228 476
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 477 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 478 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 479 else
232 { 480 {
233#if 0 481#if CORO_PREFER_PERL_FUNCTIONS
234 /* this is probably cleaner, but also slower? */ 482 /* this is probably cleaner? but also slower! */
483 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 484 CV *cp = Perl_cv_clone (aTHX_ cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 485 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 486 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 487 SvREFCNT_dec (cp);
239#else 488#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 489 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
241#endif 490#endif
242 } 491 }
243} 492}
244 493
245static void 494static void
246put_padlist (pTHX_ CV *cv) 495put_padlist (pTHX_ CV *cv)
247{ 496{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 497 MAGIC *mg = CORO_MAGIC_cv (cv);
498 AV *av;
249 499
250 if (!mg) 500 if (expect_false (!mg))
251 { 501 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254 mg->mg_virtual = &vtbl_coro;
255 mg->mg_obj = (SV *)newAV ();
256 }
257 502
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 503 av = (AV *)mg->mg_obj;
259}
260 504
261#define SB do { 505 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 506 av_extend (av, AvMAX (av) + 1);
263 507
264#define LOAD(state) load_state(aTHX_ (state)); 508 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 509}
266 510
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 511/** load & save, init *******************************************************/
268 512
269static void 513static void
270load_state(pTHX_ Coro__State c) 514load_perl (pTHX_ Coro__State c)
271{ 515{
272 PL_dowarn = c->dowarn; 516 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 517 c->slot = 0;
274 518
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 519 PL_mainstack = c->mainstack;
278 PL_stack_sp = c->stack_sp;
279 PL_op = c->op;
280 PL_curpad = c->curpad;
281 PL_comppad = c->comppad;
282 PL_compcv = c->compcv;
283 PL_stack_base = c->stack_base;
284 PL_stack_max = c->stack_max;
285 PL_tmps_stack = c->tmps_stack;
286 PL_tmps_floor = c->tmps_floor;
287 PL_tmps_ix = c->tmps_ix;
288 PL_tmps_max = c->tmps_max;
289 PL_markstack = c->markstack;
290 PL_markstack_ptr = c->markstack_ptr;
291 PL_markstack_max = c->markstack_max;
292 PL_scopestack = c->scopestack;
293 PL_scopestack_ix = c->scopestack_ix;
294 PL_scopestack_max = c->scopestack_max;
295 PL_savestack = c->savestack;
296 PL_savestack_ix = c->savestack_ix;
297 PL_savestack_max = c->savestack_max;
298#if PERL_VERSION < 9
299 PL_retstack = c->retstack;
300 PL_retstack_ix = c->retstack_ix;
301 PL_retstack_max = c->retstack_max;
302#endif
303 PL_curpm = c->curpm;
304 PL_curcop = c->curcop;
305 520
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 521 GvSV (PL_defgv) = slot->defsv;
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 522 GvAV (PL_defgv) = slot->defav;
308 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 523 GvSV (PL_errgv) = slot->errsv;
524 GvSV (irsgv) = slot->irsgv;
525
526 #define VAR(name,type) PL_ ## name = slot->name;
527 # include "state.h"
528 #undef VAR
309 529
310 { 530 {
311 dSP; 531 dSP;
532
312 CV *cv; 533 CV *cv;
313 534
314 /* now do the ugly restore mess */ 535 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs)) 536 while (expect_true (cv = (CV *)POPs))
316 { 537 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */ 538 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist; 539 CvDEPTH (cv) = PTR2IV (POPs);
323 } 540 CvPADLIST (cv) = (AV *)POPs;
324
325 ++CvDEPTH(cv);
326 } 541 }
327 542
328 PUTBACK; 543 PUTBACK;
329 } 544 }
330}
331 545
546 slf_frame = c->slf_frame;
547 CORO_THROW = c->except;
548}
549
332static void 550static void
333save_state(pTHX_ Coro__State c, int flags) 551save_perl (pTHX_ Coro__State c)
334{ 552{
553 c->except = CORO_THROW;
554 c->slf_frame = slf_frame;
555
335 { 556 {
336 dSP; 557 dSP;
337 I32 cxix = cxstack_ix; 558 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack; 559 PERL_CONTEXT *ccstk = cxstack;
339 PERL_SI *top_si = PL_curstackinfo; 560 PERL_SI *top_si = PL_curstackinfo;
… …
341 /* 562 /*
342 * the worst thing you can imagine happens first - we have to save 563 * the worst thing you can imagine happens first - we have to save
343 * (and reinitialize) all cv's in the whole callchain :( 564 * (and reinitialize) all cv's in the whole callchain :(
344 */ 565 */
345 566
346 PUSHs (Nullsv); 567 XPUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */ 568 /* this loop was inspired by pp_caller */
348 for (;;) 569 for (;;)
349 { 570 {
350 while (cxix >= 0) 571 while (expect_true (cxix >= 0))
351 { 572 {
352 PERL_CONTEXT *cx = &ccstk[cxix--]; 573 PERL_CONTEXT *cx = &ccstk[cxix--];
353 574
354 if (CxTYPE(cx) == CXt_SUB) 575 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355 { 576 {
356 CV *cv = cx->blk_sub.cv; 577 CV *cv = cx->blk_sub.cv;
578
357 if (CvDEPTH(cv)) 579 if (expect_true (CvDEPTH (cv)))
358 { 580 {
359 EXTEND (SP, CvDEPTH(cv)*2); 581 EXTEND (SP, 3);
360
361 while (--CvDEPTH(cv))
362 {
363 /* this tells the restore code to increment CvDEPTH */
364 PUSHs (Nullsv);
365 PUSHs ((SV *)cv);
366 }
367
368 PUSHs ((SV *)CvPADLIST(cv)); 582 PUSHs ((SV *)CvPADLIST (cv));
583 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
369 PUSHs ((SV *)cv); 584 PUSHs ((SV *)cv);
370 585
586 CvDEPTH (cv) = 0;
371 get_padlist (aTHX_ cv); 587 get_padlist (aTHX_ cv);
372 } 588 }
373 } 589 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE(cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 590 }
383 591
384 if (top_si->si_type == PERLSI_MAIN) 592 if (expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 593 break;
386 594
387 top_si = top_si->si_prev; 595 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 596 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 597 cxix = top_si->si_cxix;
390 } 598 }
391 599
392 PUTBACK; 600 PUTBACK;
393 } 601 }
394 602
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 603 /* allocate some space on the context stack for our purposes */
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 604 /* we manually unroll here, as usually 2 slots is enough */
397 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 605 if (SLOT_COUNT >= 1) CXINC;
606 if (SLOT_COUNT >= 2) CXINC;
607 if (SLOT_COUNT >= 3) CXINC;
608 {
609 int i;
610 for (i = 3; i < SLOT_COUNT; ++i)
611 CXINC;
612 }
613 cxstack_ix -= SLOT_COUNT; /* undo allocation */
398 614
399 c->dowarn = PL_dowarn;
400 c->in_eval = PL_in_eval;
401
402 c->curstackinfo = PL_curstackinfo;
403 c->curstack = PL_curstack;
404 c->mainstack = PL_mainstack; 615 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp; 616
406 c->op = PL_op; 617 {
407 c->curpad = PL_curpad; 618 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408 c->comppad = PL_comppad; 619
409 c->compcv = PL_compcv; 620 slot->defav = GvAV (PL_defgv);
410 c->stack_base = PL_stack_base; 621 slot->defsv = DEFSV;
411 c->stack_max = PL_stack_max; 622 slot->errsv = ERRSV;
412 c->tmps_stack = PL_tmps_stack; 623 slot->irsgv = GvSV (irsgv);
413 c->tmps_floor = PL_tmps_floor; 624
414 c->tmps_ix = PL_tmps_ix; 625 #define VAR(name,type) slot->name = PL_ ## name;
415 c->tmps_max = PL_tmps_max; 626 # include "state.h"
416 c->markstack = PL_markstack; 627 #undef VAR
417 c->markstack_ptr = PL_markstack_ptr; 628 }
418 c->markstack_max = PL_markstack_max;
419 c->scopestack = PL_scopestack;
420 c->scopestack_ix = PL_scopestack_ix;
421 c->scopestack_max = PL_scopestack_max;
422 c->savestack = PL_savestack;
423 c->savestack_ix = PL_savestack_ix;
424 c->savestack_max = PL_savestack_max;
425#if PERL_VERSION < 9
426 c->retstack = PL_retstack;
427 c->retstack_ix = PL_retstack_ix;
428 c->retstack_max = PL_retstack_max;
429#endif
430 c->curpm = PL_curpm;
431 c->curcop = PL_curcop;
432} 629}
433 630
434/* 631/*
435 * allocate various perl stacks. This is an exact copy 632 * allocate various perl stacks. This is almost an exact copy
436 * of perl.c:init_stacks, except that it uses less memory 633 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do 634 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace. 635 * not usually need a lot of stackspace.
439 */ 636 */
637#if CORO_PREFER_PERL_FUNCTIONS
638# define coro_init_stacks(thx) init_stacks ()
639#else
440static void 640static void
441coro_init_stacks (pTHX) 641coro_init_stacks (pTHX)
442{ 642{
443 LOCK; 643 PL_curstackinfo = new_stackinfo(32, 8);
444
445 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446 PL_curstackinfo->si_type = PERLSI_MAIN; 644 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 645 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 646 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 647
450 PL_stack_base = AvARRAY(PL_curstack); 648 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 649 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 650 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 651
454 New(50,PL_tmps_stack,96,SV*); 652 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 653 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 654 PL_tmps_ix = -1;
457 PL_tmps_max = 96; 655 PL_tmps_max = 32;
458 656
459 New(54,PL_markstack,16,I32); 657 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 658 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16; 659 PL_markstack_max = PL_markstack + 16;
462 660
463#ifdef SET_MARK_OFFSET 661#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 662 SET_MARK_OFFSET;
465#endif 663#endif
466 664
467 New(54,PL_scopestack,16,I32); 665 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 666 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16; 667 PL_scopestack_max = 8;
470 668
471 New(54,PL_savestack,96,ANY); 669 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 670 PL_savestack_ix = 0;
473 PL_savestack_max = 96; 671 PL_savestack_max = 24;
474 672
475#if PERL_VERSION < 9 673#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,8,OP*); 674 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 675 PL_retstack_ix = 0;
478 PL_retstack_max = 8; 676 PL_retstack_max = 4;
479#endif 677#endif
480
481 UNLOCK;
482} 678}
679#endif
483 680
484/* 681/*
485 * destroy the stacks, the callchain etc... 682 * destroy the stacks, the callchain etc...
486 */ 683 */
487static void 684static void
488destroy_stacks(pTHX) 685coro_destruct_stacks (pTHX)
489{ 686{
490 if (!IN_DESTRUCT)
491 {
492 /* is this ugly, I ask? */
493 LEAVE_SCOPE (0);
494
495 /* sure it is, but more important: is it correct?? :/ */
496 FREETMPS;
497
498 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499 }
500
501 while (PL_curstackinfo->si_next) 687 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 688 PL_curstackinfo = PL_curstackinfo->si_next;
503 689
504 while (PL_curstackinfo) 690 while (PL_curstackinfo)
505 { 691 {
506 PERL_SI *p = PL_curstackinfo->si_prev; 692 PERL_SI *p = PL_curstackinfo->si_prev;
507 693
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT) 694 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack); 695 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519 696
520 Safefree (PL_curstackinfo->si_cxstack); 697 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo); 698 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p; 699 PL_curstackinfo = p;
523 } 700 }
524 701
525 Safefree (PL_tmps_stack); 702 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 703 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 704 Safefree (PL_scopestack);
528 Safefree (PL_savestack); 705 Safefree (PL_savestack);
529#if PERL_VERSION < 9 706#if !PERL_VERSION_ATLEAST (5,10,0)
530 Safefree (PL_retstack); 707 Safefree (PL_retstack);
531#endif 708#endif
532} 709}
533 710
711#define CORO_RSS \
712 rss += sizeof (SYM (curstackinfo)); \
713 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
714 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
715 rss += SYM (tmps_max) * sizeof (SV *); \
716 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
717 rss += SYM (scopestack_max) * sizeof (I32); \
718 rss += SYM (savestack_max) * sizeof (ANY);
719
720static size_t
721coro_rss (pTHX_ struct coro *coro)
722{
723 size_t rss = sizeof (*coro);
724
725 if (coro->mainstack)
726 {
727 if (coro->flags & CF_RUNNING)
728 {
729 #define SYM(sym) PL_ ## sym
730 CORO_RSS;
731 #undef SYM
732 }
733 else
734 {
735 #define SYM(sym) coro->slot->sym
736 CORO_RSS;
737 #undef SYM
738 }
739 }
740
741 return rss;
742}
743
744/** coroutine stack handling ************************************************/
745
746static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
747static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
748static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
749
750/* apparently < 5.8.8 */
751#ifndef MgPV_nolen_const
752#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
753 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
754 (const char*)(mg)->mg_ptr)
755#endif
756
757/*
758 * This overrides the default magic get method of %SIG elements.
759 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
760 * and instead of tryign to save and restore the hash elements, we just provide
761 * readback here.
762 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
763 * not expecting this to actually change the hook. This is a potential problem
764 * when a schedule happens then, but we ignore this.
765 */
534static void 766static int
535setup_coro (struct coro *coro) 767coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
768{
769 const char *s = MgPV_nolen_const (mg);
770
771 if (*s == '_')
772 {
773 SV **svp = 0;
774
775 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
776 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
777
778 if (svp)
779 {
780 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
781 return 0;
782 }
783 }
784
785 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
786}
787
788static int
789coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
790{
791 const char *s = MgPV_nolen_const (mg);
792
793 if (*s == '_')
794 {
795 SV **svp = 0;
796
797 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
798 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
799
800 if (svp)
801 {
802 SV *old = *svp;
803 *svp = 0;
804 SvREFCNT_dec (old);
805 return 0;
806 }
807 }
808
809 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
810}
811
812static int
813coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
814{
815 const char *s = MgPV_nolen_const (mg);
816
817 if (*s == '_')
818 {
819 SV **svp = 0;
820
821 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
822 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
823
824 if (svp)
825 {
826 SV *old = *svp;
827 *svp = newSVsv (sv);
828 SvREFCNT_dec (old);
829 return 0;
830 }
831 }
832
833 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
834}
835
836static void
837prepare_nop (pTHX_ struct coro_transfer_args *ta)
838{
839 /* kind of mega-hacky, but works */
840 ta->next = ta->prev = (struct coro *)ta;
841}
842
843static int
844slf_check_nop (pTHX_ struct CoroSLF *frame)
845{
846 return 0;
847}
848
849static int
850slf_check_repeat (pTHX_ struct CoroSLF *frame)
851{
852 return 1;
853}
854
855static UNOP coro_setup_op;
856
857static void NOINLINE /* noinline to keep it out of the transfer fast path */
858coro_setup (pTHX_ struct coro *coro)
536{ 859{
537 /* 860 /*
538 * emulate part of the perl startup here. 861 * emulate part of the perl startup here.
539 */ 862 */
540 dTHX;
541 dSP;
542 UNOP myop;
543 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544
545 coro_init_stacks (aTHX); 863 coro_init_stacks (aTHX);
546 /*PL_curcop = 0;*/ 864
547 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 865 PL_runops = RUNOPS_DEFAULT;
866 PL_curcop = &PL_compiling;
867 PL_in_eval = EVAL_NULL;
868 PL_comppad = 0;
869 PL_curpm = 0;
870 PL_curpad = 0;
871 PL_localizing = 0;
872 PL_dirty = 0;
873 PL_restartop = 0;
874#if PERL_VERSION_ATLEAST (5,10,0)
875 PL_parser = 0;
876#endif
877
878 /* recreate the die/warn hooks */
879 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
880 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
881
882 GvSV (PL_defgv) = newSV (0);
883 GvAV (PL_defgv) = coro->args; coro->args = 0;
884 GvSV (PL_errgv) = newSV (0);
885 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
886 PL_rs = newSVsv (GvSV (irsgv));
887 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
888
889 {
890 dSP;
891 UNOP myop;
892
893 Zero (&myop, 1, UNOP);
894 myop.op_next = Nullop;
895 myop.op_type = OP_ENTERSUB;
896 myop.op_flags = OPf_WANT_VOID;
897
898 PUSHMARK (SP);
899 PUSHs ((SV *)coro->startcv);
900 PUTBACK;
901 PL_op = (OP *)&myop;
902 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
903 }
904
905 /* this newly created coroutine might be run on an existing cctx which most
906 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
907 */
908 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
909 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
910
911 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
912 coro_setup_op.op_next = PL_op;
913 coro_setup_op.op_type = OP_ENTERSUB;
914 coro_setup_op.op_ppaddr = pp_slf;
915 /* no flags etc. required, as an init function won't be called */
916
917 PL_op = (OP *)&coro_setup_op;
918
919 /* copy throw, in case it was set before coro_setup */
920 CORO_THROW = coro->except;
921}
922
923static void
924coro_destruct (pTHX_ struct coro *coro)
925{
926 if (!IN_DESTRUCT)
927 {
928 /* restore all saved variables and stuff */
929 LEAVE_SCOPE (0);
930 assert (PL_tmps_floor == -1);
931
932 /* free all temporaries */
933 FREETMPS;
934 assert (PL_tmps_ix == -1);
935
936 /* unwind all extra stacks */
937 POPSTACK_TO (PL_mainstack);
938
939 /* unwind main stack */
940 dounwind (-1);
941 }
942
943 SvREFCNT_dec (GvSV (PL_defgv));
548 SvREFCNT_dec (GvAV (PL_defgv)); 944 SvREFCNT_dec (GvAV (PL_defgv));
549 GvAV (PL_defgv) = coro->args; coro->args = 0; 945 SvREFCNT_dec (GvSV (PL_errgv));
946 SvREFCNT_dec (PL_defoutgv);
947 SvREFCNT_dec (PL_rs);
948 SvREFCNT_dec (GvSV (irsgv));
550 949
551 SPAGAIN; 950 SvREFCNT_dec (PL_diehook);
951 SvREFCNT_dec (PL_warnhook);
952
953 SvREFCNT_dec (coro->saved_deffh);
954 SvREFCNT_dec (coro->rouse_cb);
955 SvREFCNT_dec (coro->invoke_cb);
956 SvREFCNT_dec (coro->invoke_av);
552 957
553 Zero (&myop, 1, UNOP); 958 coro_destruct_stacks (aTHX);
554 myop.op_next = Nullop;
555 myop.op_flags = OPf_WANT_VOID;
556
557 PL_op = (OP *)&myop;
558
559 PUSHMARK(SP);
560 XPUSHs (sub_init);
561 PUTBACK;
562 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563 SPAGAIN;
564
565 ENTER; /* necessary e.g. for dounwind */
566} 959}
567 960
568static void 961INLINE void
569free_coro_mortal () 962free_coro_mortal (pTHX)
570{ 963{
571 if (coro_mortal) 964 if (expect_true (coro_mortal))
572 { 965 {
573 SvREFCNT_dec (coro_mortal); 966 SvREFCNT_dec (coro_mortal);
574 coro_mortal = 0; 967 coro_mortal = 0;
575 } 968 }
576} 969}
577 970
578static void 971static int
579coro_run (void *arg) 972runops_trace (pTHX)
580{ 973{
581 /* 974 COP *oldcop = 0;
582 * this is a _very_ stripped down perl interpreter ;) 975 int oldcxix = -2;
583 */
584 dTHX;
585 int ret;
586 976
587 UNLOCK; 977 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
978 {
979 PERL_ASYNC_CHECK ();
588 980
981 if (cctx_current->flags & CC_TRACE_ALL)
982 {
983 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
984 {
985 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
986 SV **bot, **top;
987 AV *av = newAV (); /* return values */
988 SV **cb;
989 dSP;
990
991 GV *gv = CvGV (cx->blk_sub.cv);
992 SV *fullname = sv_2mortal (newSV (0));
993 if (isGV (gv))
994 gv_efullname3 (fullname, gv, 0);
995
996 bot = PL_stack_base + cx->blk_oldsp + 1;
997 top = cx->blk_gimme == G_ARRAY ? SP + 1
998 : cx->blk_gimme == G_SCALAR ? bot + 1
999 : bot;
1000
1001 av_extend (av, top - bot);
1002 while (bot < top)
1003 av_push (av, SvREFCNT_inc_NN (*bot++));
1004
1005 PL_runops = RUNOPS_DEFAULT;
1006 ENTER;
1007 SAVETMPS;
1008 EXTEND (SP, 3);
1009 PUSHMARK (SP);
1010 PUSHs (&PL_sv_no);
1011 PUSHs (fullname);
1012 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1013 PUTBACK;
1014 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1015 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1016 SPAGAIN;
1017 FREETMPS;
1018 LEAVE;
1019 PL_runops = runops_trace;
1020 }
1021
1022 if (oldcop != PL_curcop)
1023 {
1024 oldcop = PL_curcop;
1025
1026 if (PL_curcop != &PL_compiling)
1027 {
1028 SV **cb;
1029
1030 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1031 {
1032 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1033
1034 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1035 {
1036 dSP;
1037 GV *gv = CvGV (cx->blk_sub.cv);
1038 SV *fullname = sv_2mortal (newSV (0));
1039
1040 if (isGV (gv))
1041 gv_efullname3 (fullname, gv, 0);
1042
1043 PL_runops = RUNOPS_DEFAULT;
1044 ENTER;
1045 SAVETMPS;
1046 EXTEND (SP, 3);
1047 PUSHMARK (SP);
1048 PUSHs (&PL_sv_yes);
1049 PUSHs (fullname);
1050 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1051 PUTBACK;
1052 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1053 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1054 SPAGAIN;
1055 FREETMPS;
1056 LEAVE;
1057 PL_runops = runops_trace;
1058 }
1059
1060 oldcxix = cxstack_ix;
1061 }
1062
1063 if (cctx_current->flags & CC_TRACE_LINE)
1064 {
1065 dSP;
1066
1067 PL_runops = RUNOPS_DEFAULT;
1068 ENTER;
1069 SAVETMPS;
1070 EXTEND (SP, 3);
1071 PL_runops = RUNOPS_DEFAULT;
1072 PUSHMARK (SP);
1073 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1074 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1075 PUTBACK;
1076 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1077 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1078 SPAGAIN;
1079 FREETMPS;
1080 LEAVE;
1081 PL_runops = runops_trace;
1082 }
1083 }
1084 }
1085 }
1086 }
1087
1088 TAINT_NOT;
1089 return 0;
1090}
1091
1092static struct CoroSLF cctx_ssl_frame;
1093
1094static void
1095slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1096{
1097 ta->prev = 0;
1098}
1099
1100static int
1101slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1102{
1103 *frame = cctx_ssl_frame;
1104
1105 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1106}
1107
1108/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1109static void NOINLINE
1110cctx_prepare (pTHX)
1111{
589 PL_top_env = &PL_start_env; 1112 PL_top_env = &PL_start_env;
590 1113
591 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1114 if (cctx_current->flags & CC_TRACE)
592 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op)); 1115 PL_runops = runops_trace;
593 1116
594 /* continue at cctx_init, without entersub */ 1117 /* we already must be executing an SLF op, there is no other valid way
595 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE)); 1118 * that can lead to creation of a new cctx */
1119 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1120 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
596 1121
1122 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1123 cctx_ssl_frame = slf_frame;
1124
1125 slf_frame.prepare = slf_prepare_set_stacklevel;
1126 slf_frame.check = slf_check_set_stacklevel;
1127}
1128
1129/* the tail of transfer: execute stuff we can only do after a transfer */
1130INLINE void
1131transfer_tail (pTHX)
1132{
1133 free_coro_mortal (aTHX);
1134}
1135
1136/*
1137 * this is a _very_ stripped down perl interpreter ;)
1138 */
1139static void
1140cctx_run (void *arg)
1141{
1142#ifdef USE_ITHREADS
1143# if CORO_PTHREAD
1144 PERL_SET_CONTEXT (coro_thx);
1145# endif
1146#endif
1147 {
1148 dTHX;
1149
1150 /* normally we would need to skip the entersub here */
1151 /* not doing so will re-execute it, which is exactly what we want */
1152 /* PL_nop = PL_nop->op_next */
1153
1154 /* inject a fake subroutine call to cctx_init */
1155 cctx_prepare (aTHX);
1156
1157 /* cctx_run is the alternative tail of transfer() */
1158 transfer_tail (aTHX);
1159
597 /* somebody will hit me for both perl_run and PL_restartop */ 1160 /* somebody or something will hit me for both perl_run and PL_restartop */
598 ret = perl_run (aTHX_ PERL_GET_CONTEXT); 1161 PL_restartop = PL_op;
599 printf ("ret %d\n", ret);//D 1162 perl_run (PL_curinterp);
1163 /*
1164 * Unfortunately, there is no way to get at the return values of the
1165 * coro body here, as perl_run destroys these
1166 */
600 1167
601 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1168 /*
602 abort (); 1169 * If perl-run returns we assume exit() was being called or the coro
1170 * fell off the end, which seems to be the only valid (non-bug)
1171 * reason for perl_run to return. We try to exit by jumping to the
1172 * bootstrap-time "top" top_env, as we cannot restore the "main"
1173 * coroutine as Coro has no such concept
1174 */
1175 PL_top_env = main_top_env;
1176 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1177 }
603} 1178}
604 1179
605static coro_stack * 1180static coro_cctx *
606stack_new () 1181cctx_new ()
607{ 1182{
608 coro_stack *stack; 1183 coro_cctx *cctx;
609 1184
1185 ++cctx_count;
610 New (0, stack, 1, coro_stack); 1186 New (0, cctx, 1, coro_cctx);
1187
1188 cctx->gen = cctx_gen;
1189 cctx->flags = 0;
1190 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1191
1192 return cctx;
1193}
1194
1195/* create a new cctx only suitable as source */
1196static coro_cctx *
1197cctx_new_empty ()
1198{
1199 coro_cctx *cctx = cctx_new ();
1200
1201 cctx->sptr = 0;
1202 coro_create (&cctx->cctx, 0, 0, 0, 0);
1203
1204 return cctx;
1205}
1206
1207/* create a new cctx suitable as destination/running a perl interpreter */
1208static coro_cctx *
1209cctx_new_run ()
1210{
1211 coro_cctx *cctx = cctx_new ();
1212 void *stack_start;
1213 size_t stack_size;
611 1214
612#if HAVE_MMAP 1215#if HAVE_MMAP
613
614 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1216 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
615 /* mmap suppsedly does allocate-on-write for us */ 1217 /* mmap supposedly does allocate-on-write for us */
616 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1218 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
617 1219
618 if (stack->sptr == (void *)-1) 1220 if (cctx->sptr != (void *)-1)
1221 {
1222 #if CORO_STACKGUARD
1223 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1224 #endif
1225 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1226 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1227 cctx->flags |= CC_MAPPED;
619 { 1228 }
1229 else
1230#endif
1231 {
1232 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1233 New (0, cctx->sptr, cctx_stacksize, long);
1234
1235 if (!cctx->sptr)
1236 {
620 perror ("FATAL: unable to mmap stack for coroutine"); 1237 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
621 _exit (EXIT_FAILURE); 1238 _exit (EXIT_FAILURE);
1239 }
1240
1241 stack_start = cctx->sptr;
1242 stack_size = cctx->ssize;
1243 }
1244
1245 #if CORO_USE_VALGRIND
1246 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1247 #endif
1248
1249 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1250
1251 return cctx;
1252}
1253
1254static void
1255cctx_destroy (coro_cctx *cctx)
1256{
1257 if (!cctx)
1258 return;
1259
1260 assert (cctx != cctx_current);//D temporary
1261
1262 --cctx_count;
1263 coro_destroy (&cctx->cctx);
1264
1265 /* coro_transfer creates new, empty cctx's */
1266 if (cctx->sptr)
622 } 1267 {
1268 #if CORO_USE_VALGRIND
1269 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1270 #endif
623 1271
624# if STACKGUARD 1272#if HAVE_MMAP
625 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1273 if (cctx->flags & CC_MAPPED)
1274 munmap (cctx->sptr, cctx->ssize);
1275 else
626# endif 1276#endif
1277 Safefree (cctx->sptr);
1278 }
627 1279
1280 Safefree (cctx);
1281}
1282
1283/* wether this cctx should be destructed */
1284#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1285
1286static coro_cctx *
1287cctx_get (pTHX)
1288{
1289 while (expect_true (cctx_first))
1290 {
1291 coro_cctx *cctx = cctx_first;
1292 cctx_first = cctx->next;
1293 --cctx_idle;
1294
1295 if (expect_true (!CCTX_EXPIRED (cctx)))
1296 return cctx;
1297
1298 cctx_destroy (cctx);
1299 }
1300
1301 return cctx_new_run ();
1302}
1303
1304static void
1305cctx_put (coro_cctx *cctx)
1306{
1307 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1308
1309 /* free another cctx if overlimit */
1310 if (expect_false (cctx_idle >= cctx_max_idle))
1311 {
1312 coro_cctx *first = cctx_first;
1313 cctx_first = first->next;
1314 --cctx_idle;
1315
1316 cctx_destroy (first);
1317 }
1318
1319 ++cctx_idle;
1320 cctx->next = cctx_first;
1321 cctx_first = cctx;
1322}
1323
1324/** coroutine switching *****************************************************/
1325
1326static void
1327transfer_check (pTHX_ struct coro *prev, struct coro *next)
1328{
1329 /* TODO: throwing up here is considered harmful */
1330
1331 if (expect_true (prev != next))
1332 {
1333 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1334 croak ("Coro::State::transfer called with a suspended prev Coro::State, but can only transfer from running or new states,");
1335
1336 if (expect_false (next->flags & CF_RUNNING))
1337 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1338
1339 if (expect_false (next->flags & CF_DESTROYED))
1340 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1341
1342#if !PERL_VERSION_ATLEAST (5,10,0)
1343 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1344 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1345#endif
1346 }
1347}
1348
1349/* always use the TRANSFER macro */
1350static void NOINLINE /* noinline so we have a fixed stackframe */
1351transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1352{
1353 dSTACKLEVEL;
1354
1355 /* sometimes transfer is only called to set idle_sp */
1356 if (expect_false (!prev))
1357 {
1358 cctx_current->idle_sp = STACKLEVEL;
1359 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1360 }
1361 else if (expect_true (prev != next))
1362 {
1363 coro_cctx *cctx_prev;
1364
1365 if (expect_false (prev->flags & CF_NEW))
1366 {
1367 /* create a new empty/source context */
1368 prev->flags &= ~CF_NEW;
1369 prev->flags |= CF_RUNNING;
1370 }
1371
1372 prev->flags &= ~CF_RUNNING;
1373 next->flags |= CF_RUNNING;
1374
1375 /* first get rid of the old state */
1376 save_perl (aTHX_ prev);
1377
1378 if (expect_false (next->flags & CF_NEW))
1379 {
1380 /* need to start coroutine */
1381 next->flags &= ~CF_NEW;
1382 /* setup coroutine call */
1383 coro_setup (aTHX_ next);
1384 }
1385 else
1386 load_perl (aTHX_ next);
1387
1388 assert (!prev->cctx);//D temporary
1389
1390 /* possibly untie and reuse the cctx */
1391 if (expect_true (
1392 cctx_current->idle_sp == STACKLEVEL
1393 && !(cctx_current->flags & CC_TRACE)
1394 && !force_cctx
1395 ))
1396 {
1397 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1398 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1399
1400 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1401 /* without this the next cctx_get might destroy the running cctx while still in use */
1402 if (expect_false (CCTX_EXPIRED (cctx_current)))
1403 if (expect_true (!next->cctx))
1404 next->cctx = cctx_get (aTHX);
1405
1406 cctx_put (cctx_current);
1407 }
1408 else
1409 prev->cctx = cctx_current;
1410
1411 ++next->usecount;
1412
1413 cctx_prev = cctx_current;
1414 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1415
1416 next->cctx = 0;
1417
1418 if (expect_false (cctx_prev != cctx_current))
1419 {
1420 cctx_prev->top_env = PL_top_env;
1421 PL_top_env = cctx_current->top_env;
1422 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1423 }
1424
1425 transfer_tail (aTHX);
1426 }
1427}
1428
1429#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1430#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1431
1432/** high level stuff ********************************************************/
1433
1434static int
1435coro_state_destroy (pTHX_ struct coro *coro)
1436{
1437 if (coro->flags & CF_DESTROYED)
1438 return 0;
1439
1440 if (coro->on_destroy)
1441 coro->on_destroy (aTHX_ coro);
1442
1443 coro->flags |= CF_DESTROYED;
1444
1445 if (coro->flags & CF_READY)
1446 {
1447 /* reduce nready, as destroying a ready coro effectively unreadies it */
1448 /* alternative: look through all ready queues and remove the coro */
1449 --coro_nready;
1450 }
1451 else
1452 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1453
1454 if (coro->mainstack && coro->mainstack != main_mainstack)
1455 {
1456 struct coro temp;
1457
1458 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1459
1460 save_perl (aTHX_ &temp);
1461 load_perl (aTHX_ coro);
1462
1463 coro_destruct (aTHX_ coro);
1464
1465 load_perl (aTHX_ &temp);
1466
1467 coro->slot = 0;
1468 }
1469
1470 cctx_destroy (coro->cctx);
1471 SvREFCNT_dec (coro->startcv);
1472 SvREFCNT_dec (coro->args);
1473 SvREFCNT_dec (CORO_THROW);
1474
1475 if (coro->next) coro->next->prev = coro->prev;
1476 if (coro->prev) coro->prev->next = coro->next;
1477 if (coro == coro_first) coro_first = coro->next;
1478
1479 return 1;
1480}
1481
1482static int
1483coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1484{
1485 struct coro *coro = (struct coro *)mg->mg_ptr;
1486 mg->mg_ptr = 0;
1487
1488 coro->hv = 0;
1489
1490 if (--coro->refcnt < 0)
1491 {
1492 coro_state_destroy (aTHX_ coro);
1493 Safefree (coro);
1494 }
1495
1496 return 0;
1497}
1498
1499static int
1500coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1501{
1502 struct coro *coro = (struct coro *)mg->mg_ptr;
1503
1504 ++coro->refcnt;
1505
1506 return 0;
1507}
1508
1509static MGVTBL coro_state_vtbl = {
1510 0, 0, 0, 0,
1511 coro_state_free,
1512 0,
1513#ifdef MGf_DUP
1514 coro_state_dup,
628#else 1515#else
629 1516# define MGf_DUP 0
630 stack->ssize = STACKSIZE * (long)sizeof (long);
631 New (0, stack->sptr, STACKSIZE, long);
632
633 if (!stack->sptr)
634 {
635 perror (stderr, "FATAL: unable to malloc stack for coroutine");
636 _exit (EXIT_FAILURE);
637 }
638
639#endif 1517#endif
1518};
640 1519
641 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1520static void
1521prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1522{
1523 ta->prev = SvSTATE (prev_sv);
1524 ta->next = SvSTATE (next_sv);
1525 TRANSFER_CHECK (*ta);
1526}
642 1527
1528static void
1529api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1530{
1531 struct coro_transfer_args ta;
1532
1533 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1534 TRANSFER (ta, 1);
1535}
1536
1537/*****************************************************************************/
1538/* gensub: simple closure generation utility */
1539
1540#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1541
1542/* create a closure from XS, returns a code reference */
1543/* the arg can be accessed via GENSUB_ARG from the callback */
1544/* the callback must use dXSARGS/XSRETURN */
1545static SV *
1546gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1547{
1548 CV *cv = (CV *)newSV (0);
1549
1550 sv_upgrade ((SV *)cv, SVt_PVCV);
1551
1552 CvANON_on (cv);
1553 CvISXSUB_on (cv);
1554 CvXSUB (cv) = xsub;
1555 GENSUB_ARG = arg;
1556
1557 return newRV_noinc ((SV *)cv);
1558}
1559
1560/** Coro ********************************************************************/
1561
1562INLINE void
1563coro_enq (pTHX_ struct coro *coro)
1564{
1565 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1566}
1567
1568INLINE SV *
1569coro_deq (pTHX)
1570{
1571 int prio;
1572
1573 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1574 if (AvFILLp (coro_ready [prio]) >= 0)
1575 return av_shift (coro_ready [prio]);
1576
643 return stack; 1577 return 0;
644} 1578}
645 1579
646static void 1580static int
647stack_free (coro_stack *stack) 1581api_ready (pTHX_ SV *coro_sv)
648{ 1582{
649 if (!stack) 1583 struct coro *coro;
1584 SV *sv_hook;
1585 void (*xs_hook)(void);
1586
1587 if (SvROK (coro_sv))
1588 coro_sv = SvRV (coro_sv);
1589
1590 coro = SvSTATE (coro_sv);
1591
1592 if (coro->flags & CF_READY)
650 return; 1593 return 0;
651 1594
652#if HAVE_MMAP 1595 coro->flags |= CF_READY;
653 munmap (stack->sptr, stack->ssize);
654#else
655 Safefree (stack->sptr);
656#endif
657 1596
658 Safefree (stack); 1597 sv_hook = coro_nready ? 0 : coro_readyhook;
659} 1598 xs_hook = coro_nready ? 0 : coroapi.readyhook;
660 1599
661static coro_stack *stack_first; 1600 coro_enq (aTHX_ coro);
1601 ++coro_nready;
662 1602
663static coro_stack * 1603 if (sv_hook)
664stack_get ()
665{
666 coro_stack *stack;
667
668 if (stack_first)
669 {
670 stack = stack_first;
671 stack_first = stack->next;
672 }
673 else
674 { 1604 {
675 stack = stack_new (); 1605 dSP;
676 PL_op = PL_op->op_next; 1606
1607 ENTER;
1608 SAVETMPS;
1609
1610 PUSHMARK (SP);
1611 PUTBACK;
1612 call_sv (sv_hook, G_VOID | G_DISCARD);
1613
1614 FREETMPS;
1615 LEAVE;
677 } 1616 }
678 1617
1618 if (xs_hook)
1619 xs_hook ();
1620
679 return stack; 1621 return 1;
680} 1622}
681 1623
682static void 1624static int
683stack_put (coro_stack *stack) 1625api_is_ready (pTHX_ SV *coro_sv)
684{ 1626{
685 stack->next = stack_first; 1627 return !!(SvSTATE (coro_sv)->flags & CF_READY);
686 stack_first = stack;
687} 1628}
688 1629
689/* never call directly, always through the coro_state_transfer global variable */ 1630/* expects to own a reference to next->hv */
690static void 1631INLINE void
691transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1632prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
692{ 1633{
693 dSTACKLEVEL; 1634 SV *prev_sv = SvRV (coro_current);
694 1635
695 /* sometimes transfer is only called to set idle_sp */ 1636 ta->prev = SvSTATE_hv (prev_sv);
696 if (flags == TRANSFER_SET_STACKLEVEL) 1637 ta->next = next;
697 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
698 else if (prev != next)
699 {
700 coro_stack *prev__stack;
701 1638
702 LOCK; 1639 TRANSFER_CHECK (*ta);
703 1640
704 if (next->mainstack) 1641 SvRV_set (coro_current, (SV *)next->hv);
1642
1643 free_coro_mortal (aTHX);
1644 coro_mortal = prev_sv;
1645}
1646
1647static void
1648prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1649{
1650 for (;;)
1651 {
1652 SV *next_sv = coro_deq (aTHX);
1653
1654 if (expect_true (next_sv))
705 { 1655 {
706 /* coroutine already started */ 1656 struct coro *next = SvSTATE_hv (next_sv);
707 SAVE (prev, flags); 1657
708 LOAD (next); 1658 /* cannot transfer to destroyed coros, skip and look for next */
1659 if (expect_false (next->flags & CF_DESTROYED))
1660 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1661 else
1662 {
1663 next->flags &= ~CF_READY;
1664 --coro_nready;
1665
1666 prepare_schedule_to (aTHX_ ta, next);
1667 break;
1668 }
709 } 1669 }
710 else 1670 else
711 { 1671 {
712 /* need to start coroutine */ 1672 /* nothing to schedule: call the idle handler */
713 /* first get rid of the old state */ 1673 dSP;
714 SAVE (prev, -1); 1674
715 /* setup coroutine call */ 1675 ENTER;
716 setup_coro (next); 1676 SAVETMPS;
717 /* need a stack */ 1677
718 next->stack = 0; 1678 PUSHMARK (SP);
1679 PUTBACK;
1680 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1681
1682 FREETMPS;
1683 LEAVE;
719 } 1684 }
1685 }
1686}
720 1687
721 if (!prev->stack) 1688INLINE void
722 /* create a new empty context */ 1689prepare_cede (pTHX_ struct coro_transfer_args *ta)
723 Newz (0, prev->stack, 1, coro_stack); 1690{
1691 api_ready (aTHX_ coro_current);
1692 prepare_schedule (aTHX_ ta);
1693}
724 1694
725 prev__stack = prev->stack; 1695INLINE void
1696prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1697{
1698 SV *prev = SvRV (coro_current);
726 1699
727 /* possibly "free" the stack */ 1700 if (coro_nready)
728 if (prev__stack->idle_sp == STACKLEVEL) 1701 {
1702 prepare_schedule (aTHX_ ta);
1703 api_ready (aTHX_ prev);
1704 }
1705 else
1706 prepare_nop (aTHX_ ta);
1707}
1708
1709static void
1710api_schedule (pTHX)
1711{
1712 struct coro_transfer_args ta;
1713
1714 prepare_schedule (aTHX_ &ta);
1715 TRANSFER (ta, 1);
1716}
1717
1718static void
1719api_schedule_to (pTHX_ SV *coro_sv)
1720{
1721 struct coro_transfer_args ta;
1722 struct coro *next = SvSTATE (coro_sv);
1723
1724 SvREFCNT_inc_NN (coro_sv);
1725 prepare_schedule_to (aTHX_ &ta, next);
1726}
1727
1728static int
1729api_cede (pTHX)
1730{
1731 struct coro_transfer_args ta;
1732
1733 prepare_cede (aTHX_ &ta);
1734
1735 if (expect_true (ta.prev != ta.next))
1736 {
1737 TRANSFER (ta, 1);
1738 return 1;
1739 }
1740 else
1741 return 0;
1742}
1743
1744static int
1745api_cede_notself (pTHX)
1746{
1747 if (coro_nready)
1748 {
1749 struct coro_transfer_args ta;
1750
1751 prepare_cede_notself (aTHX_ &ta);
1752 TRANSFER (ta, 1);
1753 return 1;
1754 }
1755 else
1756 return 0;
1757}
1758
1759static void
1760api_trace (pTHX_ SV *coro_sv, int flags)
1761{
1762 struct coro *coro = SvSTATE (coro_sv);
1763
1764 if (coro->flags & CF_RUNNING)
1765 croak ("cannot enable tracing on a running coroutine, caught");
1766
1767 if (flags & CC_TRACE)
1768 {
1769 if (!coro->cctx)
1770 coro->cctx = cctx_new_run ();
1771 else if (!(coro->cctx->flags & CC_TRACE))
1772 croak ("cannot enable tracing on coroutine with custom stack, caught");
1773
1774 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1775 }
1776 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1777 {
1778 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1779
1780 if (coro->flags & CF_RUNNING)
1781 PL_runops = RUNOPS_DEFAULT;
1782 else
1783 coro->slot->runops = RUNOPS_DEFAULT;
1784 }
1785}
1786
1787static void
1788coro_call_on_destroy (pTHX_ struct coro *coro)
1789{
1790 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1791 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1792
1793 if (on_destroyp)
1794 {
1795 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1796
1797 while (AvFILLp (on_destroy) >= 0)
729 { 1798 {
730 stack_put (prev__stack); 1799 dSP; /* don't disturb outer sp */
731 prev->stack = 0; 1800 SV *cb = av_pop (on_destroy);
1801
1802 PUSHMARK (SP);
1803
1804 if (statusp)
1805 {
1806 int i;
1807 AV *status = (AV *)SvRV (*statusp);
1808 EXTEND (SP, AvFILLp (status) + 1);
1809
1810 for (i = 0; i <= AvFILLp (status); ++i)
1811 PUSHs (AvARRAY (status)[i]);
1812 }
1813
1814 PUTBACK;
1815 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
732 } 1816 }
733
734 if (!next->stack)
735 next->stack = stack_get ();
736
737 if (prev__stack != next->stack)
738 {
739 prev__stack->top_env = PL_top_env;
740 PL_top_env = next->stack->top_env;
741 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
742 }
743
744 free_coro_mortal ();
745
746 UNLOCK;
747 }
748}
749
750/* use this function pointer to call the above function */
751/* this is done to increase chances of the compiler not inlining the call */
752/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755struct transfer_args
756{
757 struct coro *prev, *next;
758 int flags;
759};
760
761#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
762
763static void
764coro_state_destroy (struct coro *coro)
765{
766 if (coro->refcnt--)
767 return;
768
769 if (coro->mainstack && coro->mainstack != main_mainstack)
770 { 1817 }
771 struct coro temp;
772
773 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
774 LOAD (aTHX_ coro);
775
776 destroy_stacks (aTHX);
777
778 LOAD ((&temp)); /* this will get rid of defsv etc.. */
779
780 coro->mainstack = 0;
781 }
782
783 stack_free (coro->stack);
784 SvREFCNT_dec (coro->args);
785 Safefree (coro);
786} 1818}
1819
1820static void
1821slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1822{
1823 int i;
1824 HV *hv = (HV *)SvRV (coro_current);
1825 AV *av = newAV ();
1826
1827 av_extend (av, items - 1);
1828 for (i = 0; i < items; ++i)
1829 av_push (av, SvREFCNT_inc_NN (arg [i]));
1830
1831 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1832
1833 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1834 api_ready (aTHX_ sv_manager);
1835
1836 frame->prepare = prepare_schedule;
1837 frame->check = slf_check_repeat;
1838}
1839
1840/*****************************************************************************/
1841/* async pool handler */
787 1842
788static int 1843static int
789coro_state_clear (SV *sv, MAGIC *mg) 1844slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
790{ 1845{
1846 HV *hv = (HV *)SvRV (coro_current);
791 struct coro *coro = (struct coro *)mg->mg_ptr; 1847 struct coro *coro = (struct coro *)frame->data;
792 mg->mg_ptr = 0;
793 1848
794 coro_state_destroy (coro); 1849 if (!coro->invoke_cb)
795 1850 return 1; /* loop till we have invoke */
796 return 0; 1851 else
797}
798
799static int
800coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
801{
802 struct coro *coro = (struct coro *)mg->mg_ptr;
803
804 ++coro->refcnt;
805
806 return 0;
807}
808
809static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
810
811static struct coro *
812SvSTATE (SV *coro)
813{
814 HV *stash;
815 MAGIC *mg;
816
817 if (SvROK (coro))
818 coro = SvRV (coro);
819
820 stash = SvSTASH (coro);
821 if (stash != coro_stash && stash != coro_state_stash)
822 {
823 /* very slow, but rare, check */
824 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825 croak ("Coro::State object required");
826 }
827
828 mg = SvMAGIC (coro);
829 assert (mg->mg_type == PERL_MAGIC_ext);
830 return (struct coro *)mg->mg_ptr;
831}
832
833static void
834prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
835{
836 ta->prev = SvSTATE (prev);
837 ta->next = SvSTATE (next);
838 ta->flags = flags;
839}
840
841static void
842api_transfer (SV *prev, SV *next, int flags)
843{
844 dTHX;
845 struct transfer_args ta;
846
847 prepare_transfer (aTHX_ &ta, prev, next, flags);
848 TRANSFER (ta);
849}
850
851/** Coro ********************************************************************/
852
853#define PRIO_MAX 3
854#define PRIO_HIGH 1
855#define PRIO_NORMAL 0
856#define PRIO_LOW -1
857#define PRIO_IDLE -3
858#define PRIO_MIN -4
859
860/* for Coro.pm */
861static GV *coro_current, *coro_idle;
862static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863static int coro_nready;
864
865static void
866coro_enq (pTHX_ SV *sv)
867{
868 int prio;
869
870 if (SvTYPE (sv) != SVt_PVHV)
871 croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873 prio = SvSTATE (sv)->prio;
874
875 av_push (coro_ready [prio - PRIO_MIN], sv);
876 coro_nready++;
877}
878
879static SV *
880coro_deq (pTHX_ int min_prio)
881{
882 int prio = PRIO_MAX - PRIO_MIN;
883
884 min_prio -= PRIO_MIN;
885 if (min_prio < 0)
886 min_prio = 0;
887
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889 if (AvFILLp (coro_ready [prio]) >= 0)
890 { 1852 {
891 coro_nready--; 1853 hv_store (hv, "desc", sizeof ("desc") - 1,
892 return av_shift (coro_ready [prio]); 1854 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
893 }
894 1855
895 return 0; 1856 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
896}
897
898static void
899api_ready (SV *coro)
900{
901 dTHX;
902
903 if (SvROK (coro))
904 coro = SvRV (coro);
905
906 LOCK;
907 coro_enq (aTHX_ SvREFCNT_inc (coro));
908 UNLOCK;
909}
910
911static void
912prepare_schedule (aTHX_ struct transfer_args *ta)
913{
914 SV *current, *prev, *next;
915
916 LOCK;
917
918 current = GvSV (coro_current);
919
920 for (;;)
921 {
922 LOCK;
923
924 next = coro_deq (aTHX_ PRIO_MIN);
925
926 if (next)
927 break;
928
929 UNLOCK;
930 1857
931 { 1858 {
932 dSP; 1859 dSP;
933 1860 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK; 1861 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 } 1862 }
1863
1864 SvREFCNT_dec (GvAV (PL_defgv));
1865 GvAV (PL_defgv) = coro->invoke_av;
1866 coro->invoke_av = 0;
1867
1868 return 0;
1869 }
1870}
1871
1872static void
1873slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1874{
1875 HV *hv = (HV *)SvRV (coro_current);
1876 struct coro *coro = SvSTATE_hv ((SV *)hv);
1877
1878 if (expect_true (coro->saved_deffh))
944 } 1879 {
1880 /* subsequent iteration */
1881 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1882 coro->saved_deffh = 0;
945 1883
946 prev = SvRV (current); 1884 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
947 SvRV (current) = next; 1885 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1886 {
1887 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1888 coro->invoke_av = newAV ();
948 1889
949 /* free this only after the transfer */ 1890 frame->prepare = prepare_nop;
950 free_coro_mortal (); 1891 }
951 coro_mortal = prev; 1892 else
1893 {
1894 av_clear (GvAV (PL_defgv));
1895 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
952 1896
953 ta->prev = SvSTATE (prev); 1897 coro->prio = 0;
954 ta->next = SvSTATE (next);
955 ta->flags = TRANSFER_SAVE_ALL;
956 1898
957 UNLOCK; 1899 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
958} 1900 api_trace (aTHX_ coro_current, 0);
959 1901
1902 frame->prepare = prepare_schedule;
1903 av_push (av_async_pool, SvREFCNT_inc (hv));
1904 }
1905 }
1906 else
1907 {
1908 /* first iteration, simply fall through */
1909 frame->prepare = prepare_nop;
1910 }
1911
1912 frame->check = slf_check_pool_handler;
1913 frame->data = (void *)coro;
1914}
1915
1916/*****************************************************************************/
1917/* rouse callback */
1918
1919#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1920
1921static void
1922coro_rouse_callback (pTHX_ CV *cv)
1923{
1924 dXSARGS;
1925 SV *data = (SV *)GENSUB_ARG;
1926
1927 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1928 {
1929 /* first call, set args */
1930 AV *av = newAV ();
1931 SV *coro = SvRV (data);
1932
1933 SvRV_set (data, (SV *)av);
1934 api_ready (aTHX_ coro);
1935 SvREFCNT_dec (coro);
1936
1937 /* better take a full copy of the arguments */
1938 while (items--)
1939 av_store (av, items, newSVsv (ST (items)));
1940 }
1941
1942 XSRETURN_EMPTY;
1943}
1944
960static void 1945static int
1946slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1947{
1948 SV *data = (SV *)frame->data;
1949
1950 if (CORO_THROW)
1951 return 0;
1952
1953 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1954 return 1;
1955
1956 /* now push all results on the stack */
1957 {
1958 dSP;
1959 AV *av = (AV *)SvRV (data);
1960 int i;
1961
1962 EXTEND (SP, AvFILLp (av) + 1);
1963 for (i = 0; i <= AvFILLp (av); ++i)
1964 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1965
1966 /* we have stolen the elements, so ste length to zero and free */
1967 AvFILLp (av) = -1;
1968 av_undef (av);
1969
1970 PUTBACK;
1971 }
1972
1973 return 0;
1974}
1975
1976static void
1977slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1978{
1979 SV *cb;
1980
1981 if (items)
1982 cb = arg [0];
1983 else
1984 {
1985 struct coro *coro = SvSTATE_current;
1986
1987 if (!coro->rouse_cb)
1988 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1989
1990 cb = sv_2mortal (coro->rouse_cb);
1991 coro->rouse_cb = 0;
1992 }
1993
1994 if (!SvROK (cb)
1995 || SvTYPE (SvRV (cb)) != SVt_PVCV
1996 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1997 croak ("Coro::rouse_wait called with illegal callback argument,");
1998
1999 {
2000 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2001 SV *data = (SV *)GENSUB_ARG;
2002
2003 frame->data = (void *)data;
2004 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2005 frame->check = slf_check_rouse_wait;
2006 }
2007}
2008
2009static SV *
2010coro_new_rouse_cb (pTHX)
2011{
2012 HV *hv = (HV *)SvRV (coro_current);
2013 struct coro *coro = SvSTATE_hv (hv);
2014 SV *data = newRV_inc ((SV *)hv);
2015 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2016
2017 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2018 SvREFCNT_dec (data); /* magicext increases the refcount */
2019
2020 SvREFCNT_dec (coro->rouse_cb);
2021 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2022
2023 return cb;
2024}
2025
2026/*****************************************************************************/
2027/* schedule-like-function opcode (SLF) */
2028
2029static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2030static const CV *slf_cv;
2031static SV **slf_argv;
2032static int slf_argc, slf_arga; /* count, allocated */
2033static I32 slf_ax; /* top of stack, for restore */
2034
2035/* this restores the stack in the case we patched the entersub, to */
2036/* recreate the stack frame as perl will on following calls */
2037/* since entersub cleared the stack */
2038static OP *
2039pp_restore (pTHX)
2040{
2041 int i;
2042 SV **SP = PL_stack_base + slf_ax;
2043
2044 PUSHMARK (SP);
2045
2046 EXTEND (SP, slf_argc + 1);
2047
2048 for (i = 0; i < slf_argc; ++i)
2049 PUSHs (sv_2mortal (slf_argv [i]));
2050
2051 PUSHs ((SV *)CvGV (slf_cv));
2052
2053 RETURNOP (slf_restore.op_first);
2054}
2055
2056static void
2057slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2058{
2059 SV **arg = (SV **)slf_frame.data;
2060
2061 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2062}
2063
2064static void
2065slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2066{
2067 if (items != 2)
2068 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2069
2070 frame->prepare = slf_prepare_transfer;
2071 frame->check = slf_check_nop;
2072 frame->data = (void *)arg; /* let's hope it will stay valid */
2073}
2074
2075static void
2076slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2077{
2078 frame->prepare = prepare_schedule;
2079 frame->check = slf_check_nop;
2080}
2081
2082static void
961prepare_cede (aTHX_ struct transfer_args *ta) 2083slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
962{ 2084{
963 LOCK; 2085 struct coro *next = (struct coro *)slf_frame.data;
964 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966 2086
2087 SvREFCNT_inc_NN (next->hv);
967 prepare_schedule (ta); 2088 prepare_schedule_to (aTHX_ ta, next);
968} 2089}
969 2090
970static void 2091static void
971api_schedule (void) 2092slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
972{ 2093{
973 dTHX; 2094 if (!items)
2095 croak ("Coro::schedule_to expects a coroutine argument, caught");
2096
2097 frame->data = (void *)SvSTATE (arg [0]);
2098 frame->prepare = slf_prepare_schedule_to;
2099 frame->check = slf_check_nop;
2100}
2101
2102static void
2103slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2104{
2105 api_ready (aTHX_ SvRV (coro_current));
2106
2107 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2108}
2109
2110static void
2111slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2112{
2113 frame->prepare = prepare_cede;
2114 frame->check = slf_check_nop;
2115}
2116
2117static void
2118slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2119{
2120 frame->prepare = prepare_cede_notself;
2121 frame->check = slf_check_nop;
2122}
2123
2124/*
2125 * these not obviously related functions are all rolled into one
2126 * function to increase chances that they all will call transfer with the same
2127 * stack offset
2128 * SLF stands for "schedule-like-function".
2129 */
2130static OP *
2131pp_slf (pTHX)
2132{
2133 I32 checkmark; /* mark SP to see how many elements check has pushed */
2134
2135 /* set up the slf frame, unless it has already been set-up */
2136 /* the latter happens when a new coro has been started */
2137 /* or when a new cctx was attached to an existing coroutine */
2138 if (expect_true (!slf_frame.prepare))
2139 {
2140 /* first iteration */
2141 dSP;
2142 SV **arg = PL_stack_base + TOPMARK + 1;
2143 int items = SP - arg; /* args without function object */
2144 SV *gv = *sp;
2145
2146 /* do a quick consistency check on the "function" object, and if it isn't */
2147 /* for us, divert to the real entersub */
2148 if (SvTYPE (gv) != SVt_PVGV
2149 || !GvCV (gv)
2150 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2151 return PL_ppaddr[OP_ENTERSUB](aTHX);
2152
2153 if (!(PL_op->op_flags & OPf_STACKED))
2154 {
2155 /* ampersand-form of call, use @_ instead of stack */
2156 AV *av = GvAV (PL_defgv);
2157 arg = AvARRAY (av);
2158 items = AvFILLp (av) + 1;
2159 }
2160
2161 /* now call the init function, which needs to set up slf_frame */
2162 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2163 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2164
2165 /* pop args */
2166 SP = PL_stack_base + POPMARK;
2167
2168 PUTBACK;
2169 }
2170
2171 /* now that we have a slf_frame, interpret it! */
2172 /* we use a callback system not to make the code needlessly */
2173 /* complicated, but so we can run multiple perl coros from one cctx */
2174
2175 do
2176 {
974 struct transfer_args ta; 2177 struct coro_transfer_args ta;
975 2178
976 prepare_schedule (&ta); 2179 slf_frame.prepare (aTHX_ &ta);
977 TRANSFER (ta); 2180 TRANSFER (ta, 0);
978}
979 2181
2182 checkmark = PL_stack_sp - PL_stack_base;
2183 }
2184 while (slf_frame.check (aTHX_ &slf_frame));
2185
2186 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2187
2188 /* exception handling */
2189 if (expect_false (CORO_THROW))
2190 {
2191 SV *exception = sv_2mortal (CORO_THROW);
2192
2193 CORO_THROW = 0;
2194 sv_setsv (ERRSV, exception);
2195 croak (0);
2196 }
2197
2198 /* return value handling - mostly like entersub */
2199 /* make sure we put something on the stack in scalar context */
2200 if (GIMME_V == G_SCALAR)
2201 {
2202 dSP;
2203 SV **bot = PL_stack_base + checkmark;
2204
2205 if (sp == bot) /* too few, push undef */
2206 bot [1] = &PL_sv_undef;
2207 else if (sp != bot + 1) /* too many, take last one */
2208 bot [1] = *sp;
2209
2210 SP = bot + 1;
2211
2212 PUTBACK;
2213 }
2214
2215 return NORMAL;
2216}
2217
2218static void
2219api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2220{
2221 int i;
2222 SV **arg = PL_stack_base + ax;
2223 int items = PL_stack_sp - arg + 1;
2224
2225 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2226
2227 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2228 && PL_op->op_ppaddr != pp_slf)
2229 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2230
2231 CvFLAGS (cv) |= CVf_SLF;
2232 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2233 slf_cv = cv;
2234
2235 /* we patch the op, and then re-run the whole call */
2236 /* we have to put the same argument on the stack for this to work */
2237 /* and this will be done by pp_restore */
2238 slf_restore.op_next = (OP *)&slf_restore;
2239 slf_restore.op_type = OP_CUSTOM;
2240 slf_restore.op_ppaddr = pp_restore;
2241 slf_restore.op_first = PL_op;
2242
2243 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2244
2245 if (PL_op->op_flags & OPf_STACKED)
2246 {
2247 if (items > slf_arga)
2248 {
2249 slf_arga = items;
2250 free (slf_argv);
2251 slf_argv = malloc (slf_arga * sizeof (SV *));
2252 }
2253
2254 slf_argc = items;
2255
2256 for (i = 0; i < items; ++i)
2257 slf_argv [i] = SvREFCNT_inc (arg [i]);
2258 }
2259 else
2260 slf_argc = 0;
2261
2262 PL_op->op_ppaddr = pp_slf;
2263 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2264
2265 PL_op = (OP *)&slf_restore;
2266}
2267
2268/*****************************************************************************/
2269/* PerlIO::cede */
2270
2271typedef struct
2272{
2273 PerlIOBuf base;
2274 NV next, every;
2275} PerlIOCede;
2276
2277static IV
2278PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2279{
2280 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2281
2282 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2283 self->next = nvtime () + self->every;
2284
2285 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2286}
2287
2288static SV *
2289PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2290{
2291 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2292
2293 return newSVnv (self->every);
2294}
2295
2296static IV
2297PerlIOCede_flush (pTHX_ PerlIO *f)
2298{
2299 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2300 double now = nvtime ();
2301
2302 if (now >= self->next)
2303 {
2304 api_cede (aTHX);
2305 self->next = now + self->every;
2306 }
2307
2308 return PerlIOBuf_flush (aTHX_ f);
2309}
2310
2311static PerlIO_funcs PerlIO_cede =
2312{
2313 sizeof(PerlIO_funcs),
2314 "cede",
2315 sizeof(PerlIOCede),
2316 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2317 PerlIOCede_pushed,
2318 PerlIOBuf_popped,
2319 PerlIOBuf_open,
2320 PerlIOBase_binmode,
2321 PerlIOCede_getarg,
2322 PerlIOBase_fileno,
2323 PerlIOBuf_dup,
2324 PerlIOBuf_read,
2325 PerlIOBuf_unread,
2326 PerlIOBuf_write,
2327 PerlIOBuf_seek,
2328 PerlIOBuf_tell,
2329 PerlIOBuf_close,
2330 PerlIOCede_flush,
2331 PerlIOBuf_fill,
2332 PerlIOBase_eof,
2333 PerlIOBase_error,
2334 PerlIOBase_clearerr,
2335 PerlIOBase_setlinebuf,
2336 PerlIOBuf_get_base,
2337 PerlIOBuf_bufsiz,
2338 PerlIOBuf_get_ptr,
2339 PerlIOBuf_get_cnt,
2340 PerlIOBuf_set_ptrcnt,
2341};
2342
2343/*****************************************************************************/
2344/* Coro::Semaphore & Coro::Signal */
2345
2346static SV *
2347coro_waitarray_new (pTHX_ int count)
2348{
2349 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2350 AV *av = newAV ();
2351 SV **ary;
2352
2353 /* unfortunately, building manually saves memory */
2354 Newx (ary, 2, SV *);
2355 AvALLOC (av) = ary;
2356 /*AvARRAY (av) = ary;*/
2357 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2358 AvMAX (av) = 1;
2359 AvFILLp (av) = 0;
2360 ary [0] = newSViv (count);
2361
2362 return newRV_noinc ((SV *)av);
2363}
2364
2365/* semaphore */
2366
2367static void
2368coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2369{
2370 SV *count_sv = AvARRAY (av)[0];
2371 IV count = SvIVX (count_sv);
2372
2373 count += adjust;
2374 SvIVX (count_sv) = count;
2375
2376 /* now wake up as many waiters as are expected to lock */
2377 while (count > 0 && AvFILLp (av) > 0)
2378 {
2379 SV *cb;
2380
2381 /* swap first two elements so we can shift a waiter */
2382 AvARRAY (av)[0] = AvARRAY (av)[1];
2383 AvARRAY (av)[1] = count_sv;
2384 cb = av_shift (av);
2385
2386 if (SvOBJECT (cb))
2387 {
2388 api_ready (aTHX_ cb);
2389 --count;
2390 }
2391 else if (SvTYPE (cb) == SVt_PVCV)
2392 {
2393 dSP;
2394 PUSHMARK (SP);
2395 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2396 PUTBACK;
2397 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2398 }
2399
2400 SvREFCNT_dec (cb);
2401 }
2402}
2403
2404static void
2405coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2406{
2407 /* call $sem->adjust (0) to possibly wake up some other waiters */
2408 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2409}
2410
980static void 2411static int
981api_cede (void) 2412slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
982{ 2413{
983 dTHX; 2414 AV *av = (AV *)frame->data;
984 struct transfer_args ta; 2415 SV *count_sv = AvARRAY (av)[0];
985 2416
986 prepare_cede (&ta); 2417 /* if we are about to throw, don't actually acquire the lock, just throw */
987 TRANSFER (ta); 2418 if (CORO_THROW)
988} 2419 return 0;
2420 else if (SvIVX (count_sv) > 0)
2421 {
2422 SvSTATE_current->on_destroy = 0;
989 2423
2424 if (acquire)
2425 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2426 else
2427 coro_semaphore_adjust (aTHX_ av, 0);
2428
2429 return 0;
2430 }
2431 else
2432 {
2433 int i;
2434 /* if we were woken up but can't down, we look through the whole */
2435 /* waiters list and only add us if we aren't in there already */
2436 /* this avoids some degenerate memory usage cases */
2437
2438 for (i = 1; i <= AvFILLp (av); ++i)
2439 if (AvARRAY (av)[i] == SvRV (coro_current))
2440 return 1;
2441
2442 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2443 return 1;
2444 }
2445}
2446
2447static int
2448slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2449{
2450 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2451}
2452
2453static int
2454slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2455{
2456 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2457}
2458
2459static void
2460slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2461{
2462 AV *av = (AV *)SvRV (arg [0]);
2463
2464 if (SvIVX (AvARRAY (av)[0]) > 0)
2465 {
2466 frame->data = (void *)av;
2467 frame->prepare = prepare_nop;
2468 }
2469 else
2470 {
2471 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2472
2473 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2474 frame->prepare = prepare_schedule;
2475
2476 /* to avoid race conditions when a woken-up coro gets terminated */
2477 /* we arrange for a temporary on_destroy that calls adjust (0) */
2478 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2479 }
2480}
2481
2482static void
2483slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2484{
2485 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2486 frame->check = slf_check_semaphore_down;
2487}
2488
2489static void
2490slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2491{
2492 if (items >= 2)
2493 {
2494 /* callback form */
2495 AV *av = (AV *)SvRV (arg [0]);
2496 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2497
2498 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2499
2500 if (SvIVX (AvARRAY (av)[0]) > 0)
2501 coro_semaphore_adjust (aTHX_ av, 0);
2502
2503 frame->prepare = prepare_nop;
2504 frame->check = slf_check_nop;
2505 }
2506 else
2507 {
2508 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2509 frame->check = slf_check_semaphore_wait;
2510 }
2511}
2512
2513/* signal */
2514
2515static void
2516coro_signal_wake (pTHX_ AV *av, int count)
2517{
2518 SvIVX (AvARRAY (av)[0]) = 0;
2519
2520 /* now signal count waiters */
2521 while (count > 0 && AvFILLp (av) > 0)
2522 {
2523 SV *cb;
2524
2525 /* swap first two elements so we can shift a waiter */
2526 cb = AvARRAY (av)[0];
2527 AvARRAY (av)[0] = AvARRAY (av)[1];
2528 AvARRAY (av)[1] = cb;
2529
2530 cb = av_shift (av);
2531
2532 api_ready (aTHX_ cb);
2533 sv_setiv (cb, 0); /* signal waiter */
2534 SvREFCNT_dec (cb);
2535
2536 --count;
2537 }
2538}
2539
2540static int
2541slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2542{
2543 /* if we are about to throw, also stop waiting */
2544 return SvROK ((SV *)frame->data) && !CORO_THROW;
2545}
2546
2547static void
2548slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2549{
2550 AV *av = (AV *)SvRV (arg [0]);
2551
2552 if (SvIVX (AvARRAY (av)[0]))
2553 {
2554 SvIVX (AvARRAY (av)[0]) = 0;
2555 frame->prepare = prepare_nop;
2556 frame->check = slf_check_nop;
2557 }
2558 else
2559 {
2560 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2561
2562 av_push (av, waiter);
2563
2564 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2565 frame->prepare = prepare_schedule;
2566 frame->check = slf_check_signal_wait;
2567 }
2568}
2569
2570/*****************************************************************************/
2571/* Coro::AIO */
2572
2573#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2574
2575/* helper storage struct */
2576struct io_state
2577{
2578 int errorno;
2579 I32 laststype; /* U16 in 5.10.0 */
2580 int laststatval;
2581 Stat_t statcache;
2582};
2583
2584static void
2585coro_aio_callback (pTHX_ CV *cv)
2586{
2587 dXSARGS;
2588 AV *state = (AV *)GENSUB_ARG;
2589 SV *coro = av_pop (state);
2590 SV *data_sv = newSV (sizeof (struct io_state));
2591
2592 av_extend (state, items - 1);
2593
2594 sv_upgrade (data_sv, SVt_PV);
2595 SvCUR_set (data_sv, sizeof (struct io_state));
2596 SvPOK_only (data_sv);
2597
2598 {
2599 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2600
2601 data->errorno = errno;
2602 data->laststype = PL_laststype;
2603 data->laststatval = PL_laststatval;
2604 data->statcache = PL_statcache;
2605 }
2606
2607 /* now build the result vector out of all the parameters and the data_sv */
2608 {
2609 int i;
2610
2611 for (i = 0; i < items; ++i)
2612 av_push (state, SvREFCNT_inc_NN (ST (i)));
2613 }
2614
2615 av_push (state, data_sv);
2616
2617 api_ready (aTHX_ coro);
2618 SvREFCNT_dec (coro);
2619 SvREFCNT_dec ((AV *)state);
2620}
2621
2622static int
2623slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2624{
2625 AV *state = (AV *)frame->data;
2626
2627 /* if we are about to throw, return early */
2628 /* this does not cancel the aio request, but at least */
2629 /* it quickly returns */
2630 if (CORO_THROW)
2631 return 0;
2632
2633 /* one element that is an RV? repeat! */
2634 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2635 return 1;
2636
2637 /* restore status */
2638 {
2639 SV *data_sv = av_pop (state);
2640 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2641
2642 errno = data->errorno;
2643 PL_laststype = data->laststype;
2644 PL_laststatval = data->laststatval;
2645 PL_statcache = data->statcache;
2646
2647 SvREFCNT_dec (data_sv);
2648 }
2649
2650 /* push result values */
2651 {
2652 dSP;
2653 int i;
2654
2655 EXTEND (SP, AvFILLp (state) + 1);
2656 for (i = 0; i <= AvFILLp (state); ++i)
2657 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2658
2659 PUTBACK;
2660 }
2661
2662 return 0;
2663}
2664
2665static void
2666slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2667{
2668 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2669 SV *coro_hv = SvRV (coro_current);
2670 struct coro *coro = SvSTATE_hv (coro_hv);
2671
2672 /* put our coroutine id on the state arg */
2673 av_push (state, SvREFCNT_inc_NN (coro_hv));
2674
2675 /* first see whether we have a non-zero priority and set it as AIO prio */
2676 if (coro->prio)
2677 {
2678 dSP;
2679
2680 static SV *prio_cv;
2681 static SV *prio_sv;
2682
2683 if (expect_false (!prio_cv))
2684 {
2685 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2686 prio_sv = newSViv (0);
2687 }
2688
2689 PUSHMARK (SP);
2690 sv_setiv (prio_sv, coro->prio);
2691 XPUSHs (prio_sv);
2692
2693 PUTBACK;
2694 call_sv (prio_cv, G_VOID | G_DISCARD);
2695 }
2696
2697 /* now call the original request */
2698 {
2699 dSP;
2700 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2701 int i;
2702
2703 PUSHMARK (SP);
2704
2705 /* first push all args to the stack */
2706 EXTEND (SP, items + 1);
2707
2708 for (i = 0; i < items; ++i)
2709 PUSHs (arg [i]);
2710
2711 /* now push the callback closure */
2712 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2713
2714 /* now call the AIO function - we assume our request is uncancelable */
2715 PUTBACK;
2716 call_sv ((SV *)req, G_VOID | G_DISCARD);
2717 }
2718
2719 /* now that the requets is going, we loop toll we have a result */
2720 frame->data = (void *)state;
2721 frame->prepare = prepare_schedule;
2722 frame->check = slf_check_aio_req;
2723}
2724
2725static void
2726coro_aio_req_xs (pTHX_ CV *cv)
2727{
2728 dXSARGS;
2729
2730 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2731
2732 XSRETURN_EMPTY;
2733}
2734
2735/*****************************************************************************/
2736
2737#if CORO_CLONE
2738# include "clone.c"
2739#endif
2740
990MODULE = Coro::State PACKAGE = Coro::State 2741MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 2742
992PROTOTYPES: DISABLE 2743PROTOTYPES: DISABLE
993 2744
994BOOT: 2745BOOT:
995{ 2746{
996#ifdef USE_ITHREADS 2747#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 2748# if CORO_PTHREAD
2749 coro_thx = PERL_GET_CONTEXT;
2750# endif
998#endif 2751#endif
999 BOOT_PAGESIZE; 2752 BOOT_PAGESIZE;
1000 2753
2754 cctx_current = cctx_new_empty ();
2755
2756 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2757 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2758
2759 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2760 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2761 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2762
2763 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2764 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2765 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2766
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2767 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 2768
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2769 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2770 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2771 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2772 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006 2773
1007 main_mainstack = PL_mainstack; 2774 main_mainstack = PL_mainstack;
2775 main_top_env = PL_top_env;
1008 2776
2777 while (main_top_env->je_prev)
2778 main_top_env = main_top_env->je_prev;
2779
2780 {
2781 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2782
2783 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2784 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2785
2786 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2787 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2788 }
2789
1009 coroapi.ver = CORO_API_VERSION; 2790 coroapi.ver = CORO_API_VERSION;
2791 coroapi.rev = CORO_API_REVISION;
2792
1010 coroapi.transfer = api_transfer; 2793 coroapi.transfer = api_transfer;
2794
2795 coroapi.sv_state = SvSTATE_;
2796 coroapi.execute_slf = api_execute_slf;
2797 coroapi.prepare_nop = prepare_nop;
2798 coroapi.prepare_schedule = prepare_schedule;
2799 coroapi.prepare_cede = prepare_cede;
2800 coroapi.prepare_cede_notself = prepare_cede_notself;
2801
2802 {
2803 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2804
2805 if (!svp) croak ("Time::HiRes is required");
2806 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2807
2808 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2809 }
1011 2810
1012 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2811 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1013} 2812}
1014 2813
1015SV * 2814SV *
1016new (char *klass, ...) 2815new (char *klass, ...)
2816 ALIAS:
2817 Coro::new = 1
1017 CODE: 2818 CODE:
1018{ 2819{
1019 struct coro *coro; 2820 struct coro *coro;
2821 MAGIC *mg;
1020 HV *hv; 2822 HV *hv;
2823 CV *cb;
1021 int i; 2824 int i;
1022 2825
2826 if (items > 1)
2827 {
2828 cb = coro_sv_2cv (aTHX_ ST (1));
2829
2830 if (!ix)
2831 {
2832 if (CvISXSUB (cb))
2833 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2834
2835 if (!CvROOT (cb))
2836 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2837 }
2838 }
2839
1023 Newz (0, coro, 1, struct coro); 2840 Newz (0, coro, 1, struct coro);
1024 coro->args = newAV (); 2841 coro->args = newAV ();
2842 coro->flags = CF_NEW;
1025 2843
2844 if (coro_first) coro_first->prev = coro;
2845 coro->next = coro_first;
2846 coro_first = coro;
2847
1026 hv = newHV (); 2848 coro->hv = hv = newHV ();
1027 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2849 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2850 mg->mg_flags |= MGf_DUP;
1028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2851 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029 2852
2853 if (items > 1)
2854 {
2855 av_extend (coro->args, items - 1 + ix - 1);
2856
2857 if (ix)
2858 {
2859 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2860 cb = cv_coro_run;
2861 }
2862
2863 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2864
1030 for (i = 1; i < items; i++) 2865 for (i = 2; i < items; i++)
1031 av_push (coro->args, newSVsv (ST (i))); 2866 av_push (coro->args, newSVsv (ST (i)));
1032 2867 }
1033 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1034 /*coro->stack = 0;*/
1035} 2868}
1036 OUTPUT: 2869 OUTPUT:
1037 RETVAL 2870 RETVAL
1038 2871
1039void 2872void
1040_set_stacklevel (...) 2873transfer (...)
1041 ALIAS: 2874 PROTOTYPE: $$
1042 Coro::State::transfer = 1 2875 CODE:
1043 Coro::schedule = 2 2876 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 2877
1050 switch (ix) 2878bool
1051 { 2879_destroy (SV *coro_sv)
1052 case 0: 2880 CODE:
1053 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 2881 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1054 ta.next = 0; 2882 OUTPUT:
1055 ta.flags = TRANSFER_SET_STACKLEVEL; 2883 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 2884
1104void 2885void
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) 2886_exit (int code)
1124 int code
1125 PROTOTYPE: $ 2887 PROTOTYPE: $
1126 CODE: 2888 CODE:
1127 _exit (code); 2889 _exit (code);
1128 2890
2891SV *
2892clone (Coro::State coro)
2893 CODE:
2894{
2895#if CORO_CLONE
2896 struct coro *ncoro = coro_clone (coro);
2897 MAGIC *mg;
2898 /* TODO: too much duplication */
2899 ncoro->hv = newHV ();
2900 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2901 mg->mg_flags |= MGf_DUP;
2902 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2903#else
2904 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2905#endif
2906}
2907 OUTPUT:
2908 RETVAL
2909
2910int
2911cctx_stacksize (int new_stacksize = 0)
2912 PROTOTYPE: ;$
2913 CODE:
2914 RETVAL = cctx_stacksize;
2915 if (new_stacksize)
2916 {
2917 cctx_stacksize = new_stacksize;
2918 ++cctx_gen;
2919 }
2920 OUTPUT:
2921 RETVAL
2922
2923int
2924cctx_max_idle (int max_idle = 0)
2925 PROTOTYPE: ;$
2926 CODE:
2927 RETVAL = cctx_max_idle;
2928 if (max_idle > 1)
2929 cctx_max_idle = max_idle;
2930 OUTPUT:
2931 RETVAL
2932
2933int
2934cctx_count ()
2935 PROTOTYPE:
2936 CODE:
2937 RETVAL = cctx_count;
2938 OUTPUT:
2939 RETVAL
2940
2941int
2942cctx_idle ()
2943 PROTOTYPE:
2944 CODE:
2945 RETVAL = cctx_idle;
2946 OUTPUT:
2947 RETVAL
2948
2949void
2950list ()
2951 PROTOTYPE:
2952 PPCODE:
2953{
2954 struct coro *coro;
2955 for (coro = coro_first; coro; coro = coro->next)
2956 if (coro->hv)
2957 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2958}
2959
2960void
2961call (Coro::State coro, SV *coderef)
2962 ALIAS:
2963 eval = 1
2964 CODE:
2965{
2966 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2967 {
2968 struct coro temp;
2969
2970 if (!(coro->flags & CF_RUNNING))
2971 {
2972 PUTBACK;
2973 save_perl (aTHX_ &temp);
2974 load_perl (aTHX_ coro);
2975 }
2976
2977 {
2978 dSP;
2979 ENTER;
2980 SAVETMPS;
2981 PUTBACK;
2982 PUSHSTACK;
2983 PUSHMARK (SP);
2984
2985 if (ix)
2986 eval_sv (coderef, 0);
2987 else
2988 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2989
2990 POPSTACK;
2991 SPAGAIN;
2992 FREETMPS;
2993 LEAVE;
2994 PUTBACK;
2995 }
2996
2997 if (!(coro->flags & CF_RUNNING))
2998 {
2999 save_perl (aTHX_ coro);
3000 load_perl (aTHX_ &temp);
3001 SPAGAIN;
3002 }
3003 }
3004}
3005
3006SV *
3007is_ready (Coro::State coro)
3008 PROTOTYPE: $
3009 ALIAS:
3010 is_ready = CF_READY
3011 is_running = CF_RUNNING
3012 is_new = CF_NEW
3013 is_destroyed = CF_DESTROYED
3014 CODE:
3015 RETVAL = boolSV (coro->flags & ix);
3016 OUTPUT:
3017 RETVAL
3018
3019void
3020throw (Coro::State self, SV *throw = &PL_sv_undef)
3021 PROTOTYPE: $;$
3022 CODE:
3023{
3024 struct coro *current = SvSTATE_current;
3025 SV **throwp = self == current ? &CORO_THROW : &self->except;
3026 SvREFCNT_dec (*throwp);
3027 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3028}
3029
3030void
3031api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3032 PROTOTYPE: $;$
3033 C_ARGS: aTHX_ coro, flags
3034
3035SV *
3036has_cctx (Coro::State coro)
3037 PROTOTYPE: $
3038 CODE:
3039 /* maybe manage the running flag differently */
3040 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3041 OUTPUT:
3042 RETVAL
3043
3044int
3045is_traced (Coro::State coro)
3046 PROTOTYPE: $
3047 CODE:
3048 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3049 OUTPUT:
3050 RETVAL
3051
3052UV
3053rss (Coro::State coro)
3054 PROTOTYPE: $
3055 ALIAS:
3056 usecount = 1
3057 CODE:
3058 switch (ix)
3059 {
3060 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3061 case 1: RETVAL = coro->usecount; break;
3062 }
3063 OUTPUT:
3064 RETVAL
3065
3066void
3067force_cctx ()
3068 PROTOTYPE:
3069 CODE:
3070 cctx_current->idle_sp = 0;
3071
3072void
3073swap_defsv (Coro::State self)
3074 PROTOTYPE: $
3075 ALIAS:
3076 swap_defav = 1
3077 CODE:
3078 if (!self->slot)
3079 croak ("cannot swap state with coroutine that has no saved state,");
3080 else
3081 {
3082 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3083 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3084
3085 SV *tmp = *src; *src = *dst; *dst = tmp;
3086 }
3087
3088
1129MODULE = Coro::State PACKAGE = Coro 3089MODULE = Coro::State PACKAGE = Coro
1130 3090
1131BOOT: 3091BOOT:
1132{ 3092{
1133 int i; 3093 int i;
1134 3094
3095 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3096 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3097 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3098 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3099 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3100 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3101 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3102 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3103
3104 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3105 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3106 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3107 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3108
1135 coro_stash = gv_stashpv ("Coro", TRUE); 3109 coro_stash = gv_stashpv ("Coro", TRUE);
1136 3110
1137 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3111 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3112 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3113 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3114 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3115 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3116 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143 3117
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--; ) 3118 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148 coro_ready[i] = newAV (); 3119 coro_ready[i] = newAV ();
1149 3120
1150 { 3121 {
1151 SV *sv = perl_get_sv("Coro::API", 1); 3122 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1152 3123
1153 coroapi.schedule = api_schedule; 3124 coroapi.schedule = api_schedule;
3125 coroapi.schedule_to = api_schedule_to;
1154 coroapi.cede = api_cede; 3126 coroapi.cede = api_cede;
3127 coroapi.cede_notself = api_cede_notself;
1155 coroapi.ready = api_ready; 3128 coroapi.ready = api_ready;
3129 coroapi.is_ready = api_is_ready;
1156 coroapi.nready = &coro_nready; 3130 coroapi.nready = coro_nready;
1157 coroapi.current = coro_current; 3131 coroapi.current = coro_current;
1158 3132
1159 GCoroAPI = &coroapi; 3133 /*GCoroAPI = &coroapi;*/
1160 sv_setiv (sv, (IV)&coroapi); 3134 sv_setiv (sv, (IV)&coroapi);
1161 SvREADONLY_on (sv); 3135 SvREADONLY_on (sv);
1162 } 3136 }
1163} 3137}
1164 3138
3139void
3140terminate (...)
3141 CODE:
3142 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3143
3144void
3145schedule (...)
3146 CODE:
3147 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3148
3149void
3150schedule_to (...)
3151 CODE:
3152 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3153
3154void
3155cede_to (...)
3156 CODE:
3157 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3158
3159void
3160cede (...)
3161 CODE:
3162 CORO_EXECUTE_SLF_XS (slf_init_cede);
3163
3164void
3165cede_notself (...)
3166 CODE:
3167 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3168
3169void
3170_cancel (Coro::State self)
3171 CODE:
3172 coro_state_destroy (aTHX_ self);
3173 coro_call_on_destroy (aTHX_ self);
3174
3175void
3176_set_current (SV *current)
3177 PROTOTYPE: $
3178 CODE:
3179 SvREFCNT_dec (SvRV (coro_current));
3180 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3181
3182void
3183_set_readyhook (SV *hook)
3184 PROTOTYPE: $
3185 CODE:
3186 SvREFCNT_dec (coro_readyhook);
3187 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3188
1165int 3189int
1166prio (Coro::State coro, int newprio = 0) 3190prio (Coro::State coro, int newprio = 0)
3191 PROTOTYPE: $;$
1167 ALIAS: 3192 ALIAS:
1168 nice = 1 3193 nice = 1
1169 CODE: 3194 CODE:
1170{ 3195{
1171 RETVAL = coro->prio; 3196 RETVAL = coro->prio;
1172 3197
1173 if (items > 1) 3198 if (items > 1)
1174 { 3199 {
1175 if (ix) 3200 if (ix)
1176 newprio += coro->prio; 3201 newprio = coro->prio - newprio;
1177 3202
1178 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3203 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3204 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180 3205
1181 coro->prio = newprio; 3206 coro->prio = newprio;
1182 } 3207 }
1183} 3208}
3209 OUTPUT:
3210 RETVAL
1184 3211
1185void 3212SV *
1186ready (SV *self) 3213ready (SV *self)
1187 PROTOTYPE: $ 3214 PROTOTYPE: $
1188 CODE: 3215 CODE:
1189 api_ready (self); 3216 RETVAL = boolSV (api_ready (aTHX_ self));
3217 OUTPUT:
3218 RETVAL
1190 3219
1191int 3220int
1192nready (...) 3221nready (...)
1193 PROTOTYPE: 3222 PROTOTYPE:
1194 CODE: 3223 CODE:
1195 RETVAL = coro_nready; 3224 RETVAL = coro_nready;
1196 OUTPUT: 3225 OUTPUT:
1197 RETVAL 3226 RETVAL
1198 3227
1199MODULE = Coro::State PACKAGE = Coro::AIO 3228void
3229_pool_handler (...)
3230 CODE:
3231 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3232
3233void
3234async_pool (SV *cv, ...)
3235 PROTOTYPE: &@
3236 PPCODE:
3237{
3238 HV *hv = (HV *)av_pop (av_async_pool);
3239 AV *av = newAV ();
3240 SV *cb = ST (0);
3241 int i;
3242
3243 av_extend (av, items - 2);
3244 for (i = 1; i < items; ++i)
3245 av_push (av, SvREFCNT_inc_NN (ST (i)));
3246
3247 if ((SV *)hv == &PL_sv_undef)
3248 {
3249 PUSHMARK (SP);
3250 EXTEND (SP, 2);
3251 PUSHs (sv_Coro);
3252 PUSHs ((SV *)cv_pool_handler);
3253 PUTBACK;
3254 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3255 SPAGAIN;
3256
3257 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3258 }
3259
3260 {
3261 struct coro *coro = SvSTATE_hv (hv);
3262
3263 assert (!coro->invoke_cb);
3264 assert (!coro->invoke_av);
3265 coro->invoke_cb = SvREFCNT_inc (cb);
3266 coro->invoke_av = av;
3267 }
3268
3269 api_ready (aTHX_ (SV *)hv);
3270
3271 if (GIMME_V != G_VOID)
3272 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3273 else
3274 SvREFCNT_dec (hv);
3275}
1200 3276
1201SV * 3277SV *
1202_get_state () 3278rouse_cb ()
3279 PROTOTYPE:
1203 CODE: 3280 CODE:
1204{ 3281 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: 3282 OUTPUT:
1220 RETVAL 3283 RETVAL
1221 3284
1222void 3285void
1223_set_state (char *data_) 3286rouse_wait (...)
1224 PROTOTYPE: $ 3287 PROTOTYPE: ;$
3288 PPCODE:
3289 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3290
3291
3292MODULE = Coro::State PACKAGE = PerlIO::cede
3293
3294BOOT:
3295 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3296
3297
3298MODULE = Coro::State PACKAGE = Coro::Semaphore
3299
3300SV *
3301new (SV *klass, SV *count = 0)
1225 CODE: 3302 CODE:
3303 RETVAL = sv_bless (
3304 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3305 GvSTASH (CvGV (cv))
3306 );
3307 OUTPUT:
3308 RETVAL
3309
3310# helper for Coro::Channel
3311SV *
3312_alloc (int count)
3313 CODE:
3314 RETVAL = coro_waitarray_new (aTHX_ count);
3315 OUTPUT:
3316 RETVAL
3317
3318SV *
3319count (SV *self)
3320 CODE:
3321 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3322 OUTPUT:
3323 RETVAL
3324
3325void
3326up (SV *self, int adjust = 1)
3327 ALIAS:
3328 adjust = 1
3329 CODE:
3330 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3331
3332void
3333down (...)
3334 CODE:
3335 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3336
3337void
3338wait (...)
3339 CODE:
3340 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3341
3342void
3343try (SV *self)
3344 PPCODE:
1226{ 3345{
1227 struct { 3346 AV *av = (AV *)SvRV (self);
3347 SV *count_sv = AvARRAY (av)[0];
3348 IV count = SvIVX (count_sv);
3349
3350 if (count > 0)
3351 {
3352 --count;
3353 SvIVX (count_sv) = count;
3354 XSRETURN_YES;
3355 }
3356 else
3357 XSRETURN_NO;
3358}
3359
3360void
3361waiters (SV *self)
3362 PPCODE:
3363{
3364 AV *av = (AV *)SvRV (self);
3365 int wcount = AvFILLp (av) + 1 - 1;
3366
3367 if (GIMME_V == G_SCALAR)
3368 XPUSHs (sv_2mortal (newSViv (wcount)));
3369 else
3370 {
1228 int errorno; 3371 int i;
1229 int laststype; 3372 EXTEND (SP, wcount);
1230 int laststatval; 3373 for (i = 1; i <= wcount; ++i)
1231 Stat_t statcache; 3374 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1232 } *data = (void *)data_; 3375 }
1233
1234 errno = data->errorno;
1235 PL_laststype = data->laststype;
1236 PL_laststatval = data->laststatval;
1237 PL_statcache = data->statcache;
1238} 3376}
3377
3378MODULE = Coro::State PACKAGE = Coro::Signal
3379
3380SV *
3381new (SV *klass)
3382 CODE:
3383 RETVAL = sv_bless (
3384 coro_waitarray_new (aTHX_ 0),
3385 GvSTASH (CvGV (cv))
3386 );
3387 OUTPUT:
3388 RETVAL
3389
3390void
3391wait (...)
3392 CODE:
3393 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3394
3395void
3396broadcast (SV *self)
3397 CODE:
3398{
3399 AV *av = (AV *)SvRV (self);
3400 coro_signal_wake (aTHX_ av, AvFILLp (av));
3401}
3402
3403void
3404send (SV *self)
3405 CODE:
3406{
3407 AV *av = (AV *)SvRV (self);
3408
3409 if (AvFILLp (av))
3410 coro_signal_wake (aTHX_ av, 1);
3411 else
3412 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3413}
3414
3415IV
3416awaited (SV *self)
3417 CODE:
3418 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3419 OUTPUT:
3420 RETVAL
3421
3422
3423MODULE = Coro::State PACKAGE = Coro::AnyEvent
3424
3425BOOT:
3426 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3427
3428void
3429_schedule (...)
3430 CODE:
3431{
3432 static int incede;
3433
3434 api_cede_notself (aTHX);
3435
3436 ++incede;
3437 while (coro_nready >= incede && api_cede (aTHX))
3438 ;
3439
3440 sv_setsv (sv_activity, &PL_sv_undef);
3441 if (coro_nready >= incede)
3442 {
3443 PUSHMARK (SP);
3444 PUTBACK;
3445 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3446 }
3447
3448 --incede;
3449}
3450
3451
3452MODULE = Coro::State PACKAGE = Coro::AIO
3453
3454void
3455_register (char *target, char *proto, SV *req)
3456 CODE:
3457{
3458 CV *req_cv = coro_sv_2cv (aTHX_ req);
3459 /* newXSproto doesn't return the CV on 5.8 */
3460 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3461 sv_setpv ((SV *)slf_cv, proto);
3462 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3463}
3464

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