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Comparing Coro/Coro/State.xs (file contents):
Revision 1.89 by root, Sat Nov 25 00:40:26 2006 UTC vs.
Revision 1.314 by root, Thu Nov 20 03:24:39 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 <errno.h> 83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106
107/* 5.8.7 */
108#ifndef SvRV_set
109# define SvRV_set(s,v) SvRV(s) = (v)
110#endif
33 111
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 112#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 113# undef CORO_STACKGUARD
36#endif 114#endif
37 115
38#ifndef STACKGUARD 116#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 117# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 118#endif
119
120/* prefer perl internal functions over our own? */
121#ifndef CORO_PREFER_PERL_FUNCTIONS
122# define CORO_PREFER_PERL_FUNCTIONS 0
123#endif
124
125/* The next macros try to return the current stack pointer, in an as
126 * portable way as possible. */
127#if __GNUC__ >= 4
128# define dSTACKLEVEL int stacklevel_dummy
129# define STACKLEVEL __builtin_frame_address (0)
130#else
131# define dSTACKLEVEL volatile void *stacklevel
132# define STACKLEVEL ((void *)&stacklevel)
133#endif
134
135#define IN_DESTRUCT (PL_main_cv == Nullcv)
136
137#if __GNUC__ >= 3
138# define attribute(x) __attribute__(x)
139# define expect(expr,value) __builtin_expect ((expr),(value))
140# define INLINE static inline
141#else
142# define attribute(x)
143# define expect(expr,value) (expr)
144# define INLINE static
145#endif
146
147#define expect_false(expr) expect ((expr) != 0, 0)
148#define expect_true(expr) expect ((expr) != 0, 1)
149
150#define NOINLINE attribute ((noinline))
151
152#include "CoroAPI.h"
153#define GCoroAPI (&coroapi) /* very sneaky */
154
155#ifdef USE_ITHREADS
156# if CORO_PTHREAD
157static void *coro_thx;
51# endif 158# endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif 159#endif
60#endif
61 160
62#define SUB_INIT "Coro::State::initialize" 161static double (*nvtime)(); /* so why doesn't it take void? */
63 162
64/* The next macro should declare a variable stacklevel that contains and approximation 163/* we hijack an hopefully unused CV flag for our purposes */
65 * to the current C stack pointer. Its property is that it changes with each call 164#define CVf_SLF 0x4000
66 * and should be unique. */ 165static OP *pp_slf (pTHX);
67#define dSTACKLEVEL void *stacklevel = &stacklevel
68 166
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 167static U32 cctx_gen;
70 168static size_t cctx_stacksize = CORO_STACKSIZE;
71#define labs(l) ((l) >= 0 ? (l) : -(l))
72
73#include "CoroAPI.h"
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; 169static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 170static AV *main_mainstack; /* used to differentiate between $main and others */
171static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 172static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 173static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
88 174
89/* this is actually not just the c stack but also c registers etc... */ 175static GV *irsgv; /* $/ */
176static GV *stdoutgv; /* *STDOUT */
177static SV *rv_diehook;
178static SV *rv_warnhook;
179static HV *hv_sig; /* %SIG */
180
181/* async_pool helper stuff */
182static SV *sv_pool_rss;
183static SV *sv_pool_size;
184static SV *sv_async_pool_idle;
185static AV *av_async_pool;
186static SV *sv_Coro;
187static CV *cv_pool_handler;
188static CV *cv_coro_new;
189
190/* Coro::AnyEvent */
191static SV *sv_activity;
192
193static struct coro_cctx *cctx_first;
194static int cctx_count, cctx_idle;
195
196enum {
197 CC_MAPPED = 0x01,
198 CC_NOREUSE = 0x02, /* throw this away after tracing */
199 CC_TRACE = 0x04,
200 CC_TRACE_SUB = 0x08, /* trace sub calls */
201 CC_TRACE_LINE = 0x10, /* trace each statement */
202 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
203};
204
205/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 206typedef struct coro_cctx
207{
91 struct coro_stack *next; 208 struct coro_cctx *next;
92 209
93 void *idle_sp; 210 /* the stack */
94 void *sptr; 211 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 212 size_t ssize;
96 213
97 /* cpu state */ 214 /* cpu state */
215 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
216 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
217 JMPENV *top_env;
98 coro_context cctx; 218 coro_context cctx;
99} coro_stack;
100 219
101static coro_stack *main_stack; 220 U32 gen;
221#if CORO_USE_VALGRIND
222 int valgrind_id;
223#endif
224 unsigned char flags;
225} coro_cctx;
102 226
227enum {
228 CF_RUNNING = 0x0001, /* coroutine is running */
229 CF_READY = 0x0002, /* coroutine is ready */
230 CF_NEW = 0x0004, /* has never been switched to */
231 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
232};
233
234/* the structure where most of the perl state is stored, overlaid on the cxstack */
235typedef struct
236{
237 SV *defsv;
238 AV *defav;
239 SV *errsv;
240 SV *irsgv;
241#define VAR(name,type) type name;
242# include "state.h"
243#undef VAR
244} perl_slots;
245
246#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
247
248/* this is a structure representing a perl-level coroutine */
103struct coro { 249struct coro {
104 /* optionally saved, might be zero */ 250 /* the C coroutine allocated to this perl coroutine, if any */
105 AV *defav; 251 coro_cctx *cctx;
106 SV *defsv;
107 SV *errsv;
108
109 /* saved global state not related to stacks */
110 U8 dowarn;
111 I32 in_eval;
112 252
113 /* the c stack, if any */ 253 /* state data */
114 coro_stack *stack; 254 struct CoroSLF slf_frame; /* saved slf frame */
115
116 /* the stacks and related info (callchain etc..) */
117 PERL_SI *curstackinfo;
118 AV *curstack;
119 AV *mainstack; 255 AV *mainstack;
120 SV **stack_sp; 256 perl_slots *slot; /* basically the saved sp */
121 OP *op; 257
122 SV **curpad; 258 CV *startcv; /* the CV to execute */
123 AV *comppad; 259 AV *args; /* data associated with this coroutine (initial args) */
124 CV *compcv; 260 int refcnt; /* coroutines are refcounted, yes */
125 SV **stack_base; 261 int flags; /* CF_ flags */
126 SV **stack_max; 262 HV *hv; /* the perl hash associated with this coro, if any */
127 SV **tmps_stack; 263 void (*on_destroy)(pTHX_ struct coro *coro);
128 I32 tmps_floor; 264
129 I32 tmps_ix; 265 /* statistics */
130 I32 tmps_max; 266 int usecount; /* number of transfers to this coro */
131 I32 *markstack;
132 I32 *markstack_ptr;
133 I32 *markstack_max;
134 I32 *scopestack;
135 I32 scopestack_ix;
136 I32 scopestack_max;
137 ANY *savestack;
138 I32 savestack_ix;
139 I32 savestack_max;
140 OP **retstack;
141 I32 retstack_ix;
142 I32 retstack_max;
143 PMOP *curpm;
144 COP *curcop;
145 JMPENV *top_env;
146 267
147 /* coro process data */ 268 /* coro process data */
148 int prio; 269 int prio;
270 SV *except; /* exception to be thrown */
271 SV *rouse_cb;
149 272
150 /* data associated with this coroutine (initial args) */ 273 /* async_pool */
151 AV *args; 274 SV *saved_deffh;
152 int refcnt; 275 SV *invoke_cb;
276 AV *invoke_av;
277
278 /* linked list */
279 struct coro *next, *prev;
153}; 280};
154 281
155typedef struct coro *Coro__State; 282typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 283typedef struct coro *Coro__State_or_hashref;
157 284
285/* the following variables are effectively part of the perl context */
286/* and get copied between struct coro and these variables */
287/* the mainr easonw e don't support windows process emulation */
288static struct CoroSLF slf_frame; /* the current slf frame */
289
290/** Coro ********************************************************************/
291
292#define PRIO_MAX 3
293#define PRIO_HIGH 1
294#define PRIO_NORMAL 0
295#define PRIO_LOW -1
296#define PRIO_IDLE -3
297#define PRIO_MIN -4
298
299/* for Coro.pm */
300static SV *coro_current;
301static SV *coro_readyhook;
302static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
303static CV *cv_coro_run, *cv_coro_terminate;
304static struct coro *coro_first;
305#define coro_nready coroapi.nready
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
319static AV *
320coro_get_av (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_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (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_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339/* may croak */
340INLINE CV *
341coro_sv_2cv (pTHX_ SV *sv)
342{
343 HV *st;
344 GV *gvp;
345 return sv_2cv (sv, &st, &gvp, 0);
346}
347
158static AV * 348static AV *
159coro_clone_padlist (pTHX_ CV *cv) 349coro_clone_padlist (pTHX_ CV *cv)
160{ 350{
161 AV *padlist = CvPADLIST (cv); 351 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 352 AV *newpadlist, *newpad;
163 353
164 newpadlist = newAV (); 354 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 355 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 356#if PERL_VERSION_ATLEAST (5,10,0)
357 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
358#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 359 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 360#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 361 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 362 --AvFILLp (padlist);
173 363
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 364 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad); 365 av_store (newpadlist, 1, (SV *)newpad);
176 366
177 return newpadlist; 367 return newpadlist;
178} 368}
179 369
… …
209 399
210 /* casting is fun. */ 400 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 401 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 402 free_padlist (aTHX_ padlist);
213 403
214 SvREFCNT_dec (av); 404 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 405
216 return 0; 406 return 0;
217} 407}
218 408
409#define CORO_MAGIC_type_cv 26
219#define PERL_MAGIC_coro PERL_MAGIC_ext 410#define CORO_MAGIC_type_state PERL_MAGIC_ext
220 411
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 412static MGVTBL coro_cv_vtbl = {
413 0, 0, 0, 0,
414 coro_cv_free
415};
416
417#define CORO_MAGIC_NN(sv, type) \
418 (expect_true (SvMAGIC (sv)->mg_type == type) \
419 ? SvMAGIC (sv) \
420 : mg_find (sv, type))
421
422#define CORO_MAGIC(sv, type) \
423 (expect_true (SvMAGIC (sv)) \
424 ? CORO_MAGIC_NN (sv, type) \
425 : 0)
426
427#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
428#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
429
430INLINE struct coro *
431SvSTATE_ (pTHX_ SV *coro)
432{
433 HV *stash;
434 MAGIC *mg;
435
436 if (SvROK (coro))
437 coro = SvRV (coro);
438
439 if (expect_false (SvTYPE (coro) != SVt_PVHV))
440 croak ("Coro::State object required");
441
442 stash = SvSTASH (coro);
443 if (expect_false (stash != coro_stash && stash != coro_state_stash))
444 {
445 /* very slow, but rare, check */
446 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
447 croak ("Coro::State object required");
448 }
449
450 mg = CORO_MAGIC_state (coro);
451 return (struct coro *)mg->mg_ptr;
452}
453
454#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
455
456/* faster than SvSTATE, but expects a coroutine hv */
457#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
458#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
222 459
223/* the next two functions merely cache the padlists */ 460/* the next two functions merely cache the padlists */
224static void 461static void
225get_padlist (pTHX_ CV *cv) 462get_padlist (pTHX_ CV *cv)
226{ 463{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 464 MAGIC *mg = CORO_MAGIC_cv (cv);
465 AV *av;
228 466
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 467 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 468 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 469 else
232 { 470 {
233#if 0 471#if CORO_PREFER_PERL_FUNCTIONS
234 /* this should work - but it doesn't :( */ 472 /* this is probably cleaner? but also slower! */
473 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 474 CV *cp = Perl_cv_clone (aTHX_ cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 475 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 476 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 477 SvREFCNT_dec (cp);
239#else 478#else
… …
243} 482}
244 483
245static void 484static void
246put_padlist (pTHX_ CV *cv) 485put_padlist (pTHX_ CV *cv)
247{ 486{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 487 MAGIC *mg = CORO_MAGIC_cv (cv);
488 AV *av;
249 489
250 if (!mg) 490 if (expect_false (!mg))
251 { 491 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 }
257 492
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 493 av = (AV *)mg->mg_obj;
259}
260 494
261#define SB do { 495 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 496 av_extend (av, AvMAX (av) + 1);
263 497
264#define LOAD(state) load_state(aTHX_ (state)); 498 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 499}
266 500
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 501/** load & save, init *******************************************************/
268 502
269static void 503static void
270load_state(pTHX_ Coro__State c) 504load_perl (pTHX_ Coro__State c)
271{ 505{
272 PL_dowarn = c->dowarn; 506 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 507 c->slot = 0;
274 508
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 509 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 PL_top_env = c->top_env;
306 510
307 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 511 GvSV (PL_defgv) = slot->defsv;
308 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 512 GvAV (PL_defgv) = slot->defav;
309 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 513 GvSV (PL_errgv) = slot->errsv;
514 GvSV (irsgv) = slot->irsgv;
515
516 #define VAR(name,type) PL_ ## name = slot->name;
517 # include "state.h"
518 #undef VAR
310 519
311 { 520 {
312 dSP; 521 dSP;
522
313 CV *cv; 523 CV *cv;
314 524
315 /* now do the ugly restore mess */ 525 /* now do the ugly restore mess */
316 while ((cv = (CV *)POPs)) 526 while (expect_true (cv = (CV *)POPs))
317 { 527 {
318 AV *padlist = (AV *)POPs;
319
320 if (padlist)
321 {
322 put_padlist (aTHX_ cv); /* mark this padlist as available */ 528 put_padlist (aTHX_ cv); /* mark this padlist as available */
323 CvPADLIST(cv) = padlist; 529 CvDEPTH (cv) = PTR2IV (POPs);
324 } 530 CvPADLIST (cv) = (AV *)POPs;
325
326 ++CvDEPTH(cv);
327 } 531 }
328 532
329 PUTBACK; 533 PUTBACK;
330 } 534 }
331}
332 535
536 slf_frame = c->slf_frame;
537 CORO_THROW = c->except;
538}
539
333static void 540static void
334save_state(pTHX_ Coro__State c, int flags) 541save_perl (pTHX_ Coro__State c)
335{ 542{
543 c->except = CORO_THROW;
544 c->slf_frame = slf_frame;
545
336 { 546 {
337 dSP; 547 dSP;
338 I32 cxix = cxstack_ix; 548 I32 cxix = cxstack_ix;
339 PERL_CONTEXT *ccstk = cxstack; 549 PERL_CONTEXT *ccstk = cxstack;
340 PERL_SI *top_si = PL_curstackinfo; 550 PERL_SI *top_si = PL_curstackinfo;
… …
342 /* 552 /*
343 * the worst thing you can imagine happens first - we have to save 553 * the worst thing you can imagine happens first - we have to save
344 * (and reinitialize) all cv's in the whole callchain :( 554 * (and reinitialize) all cv's in the whole callchain :(
345 */ 555 */
346 556
347 PUSHs (Nullsv); 557 XPUSHs (Nullsv);
348 /* this loop was inspired by pp_caller */ 558 /* this loop was inspired by pp_caller */
349 for (;;) 559 for (;;)
350 { 560 {
351 while (cxix >= 0) 561 while (expect_true (cxix >= 0))
352 { 562 {
353 PERL_CONTEXT *cx = &ccstk[cxix--]; 563 PERL_CONTEXT *cx = &ccstk[cxix--];
354 564
355 if (CxTYPE(cx) == CXt_SUB) 565 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
356 { 566 {
357 CV *cv = cx->blk_sub.cv; 567 CV *cv = cx->blk_sub.cv;
568
358 if (CvDEPTH(cv)) 569 if (expect_true (CvDEPTH (cv)))
359 { 570 {
360 EXTEND (SP, CvDEPTH(cv)*2); 571 EXTEND (SP, 3);
361
362 while (--CvDEPTH(cv))
363 {
364 /* this tells the restore code to increment CvDEPTH */
365 PUSHs (Nullsv);
366 PUSHs ((SV *)cv);
367 }
368
369 PUSHs ((SV *)CvPADLIST(cv)); 572 PUSHs ((SV *)CvPADLIST (cv));
573 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
370 PUSHs ((SV *)cv); 574 PUSHs ((SV *)cv);
371 575
576 CvDEPTH (cv) = 0;
372 get_padlist (aTHX_ cv); 577 get_padlist (aTHX_ cv);
373 } 578 }
374 } 579 }
375#ifdef CXt_FORMAT
376 else if (CxTYPE(cx) == CXt_FORMAT)
377 {
378 /* I never used formats, so how should I know how these are implemented? */
379 /* my bold guess is as a simple, plain sub... */
380 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381 }
382#endif
383 } 580 }
384 581
385 if (top_si->si_type == PERLSI_MAIN) 582 if (expect_true (top_si->si_type == PERLSI_MAIN))
386 break; 583 break;
387 584
388 top_si = top_si->si_prev; 585 top_si = top_si->si_prev;
389 ccstk = top_si->si_cxstack; 586 ccstk = top_si->si_cxstack;
390 cxix = top_si->si_cxix; 587 cxix = top_si->si_cxix;
391 } 588 }
392 589
393 PUTBACK; 590 PUTBACK;
394 } 591 }
395 592
396 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 593 /* allocate some space on the context stack for our purposes */
397 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 594 /* we manually unroll here, as usually 2 slots is enough */
398 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 595 if (SLOT_COUNT >= 1) CXINC;
596 if (SLOT_COUNT >= 2) CXINC;
597 if (SLOT_COUNT >= 3) CXINC;
598 {
599 int i;
600 for (i = 3; i < SLOT_COUNT; ++i)
601 CXINC;
602 }
603 cxstack_ix -= SLOT_COUNT; /* undo allocation */
399 604
400 c->dowarn = PL_dowarn;
401 c->in_eval = PL_in_eval;
402
403 c->curstackinfo = PL_curstackinfo;
404 c->curstack = PL_curstack;
405 c->mainstack = PL_mainstack; 605 c->mainstack = PL_mainstack;
406 c->stack_sp = PL_stack_sp; 606
407 c->op = PL_op; 607 {
408 c->curpad = PL_curpad; 608 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
409 c->comppad = PL_comppad; 609
410 c->compcv = PL_compcv; 610 slot->defav = GvAV (PL_defgv);
411 c->stack_base = PL_stack_base; 611 slot->defsv = DEFSV;
412 c->stack_max = PL_stack_max; 612 slot->errsv = ERRSV;
413 c->tmps_stack = PL_tmps_stack; 613 slot->irsgv = GvSV (irsgv);
414 c->tmps_floor = PL_tmps_floor; 614
415 c->tmps_ix = PL_tmps_ix; 615 #define VAR(name,type) slot->name = PL_ ## name;
416 c->tmps_max = PL_tmps_max; 616 # include "state.h"
417 c->markstack = PL_markstack; 617 #undef VAR
418 c->markstack_ptr = PL_markstack_ptr; 618 }
419 c->markstack_max = PL_markstack_max;
420 c->scopestack = PL_scopestack;
421 c->scopestack_ix = PL_scopestack_ix;
422 c->scopestack_max = PL_scopestack_max;
423 c->savestack = PL_savestack;
424 c->savestack_ix = PL_savestack_ix;
425 c->savestack_max = PL_savestack_max;
426#if PERL_VERSION < 9
427 c->retstack = PL_retstack;
428 c->retstack_ix = PL_retstack_ix;
429 c->retstack_max = PL_retstack_max;
430#endif
431 c->curpm = PL_curpm;
432 c->curcop = PL_curcop;
433 c->top_env = PL_top_env;
434} 619}
435 620
436/* 621/*
437 * allocate various perl stacks. This is an exact copy 622 * allocate various perl stacks. This is almost an exact copy
438 * of perl.c:init_stacks, except that it uses less memory 623 * of perl.c:init_stacks, except that it uses less memory
439 * on the (sometimes correct) assumption that coroutines do 624 * on the (sometimes correct) assumption that coroutines do
440 * not usually need a lot of stackspace. 625 * not usually need a lot of stackspace.
441 */ 626 */
627#if CORO_PREFER_PERL_FUNCTIONS
628# define coro_init_stacks(thx) init_stacks ()
629#else
442static void 630static void
443coro_init_stacks (pTHX) 631coro_init_stacks (pTHX)
444{ 632{
445 LOCK; 633 PL_curstackinfo = new_stackinfo(32, 8);
446
447 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448 PL_curstackinfo->si_type = PERLSI_MAIN; 634 PL_curstackinfo->si_type = PERLSI_MAIN;
449 PL_curstack = PL_curstackinfo->si_stack; 635 PL_curstack = PL_curstackinfo->si_stack;
450 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 636 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451 637
452 PL_stack_base = AvARRAY(PL_curstack); 638 PL_stack_base = AvARRAY(PL_curstack);
453 PL_stack_sp = PL_stack_base; 639 PL_stack_sp = PL_stack_base;
454 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 640 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455 641
456 New(50,PL_tmps_stack,96,SV*); 642 New(50,PL_tmps_stack,32,SV*);
457 PL_tmps_floor = -1; 643 PL_tmps_floor = -1;
458 PL_tmps_ix = -1; 644 PL_tmps_ix = -1;
459 PL_tmps_max = 96; 645 PL_tmps_max = 32;
460 646
461 New(54,PL_markstack,16,I32); 647 New(54,PL_markstack,16,I32);
462 PL_markstack_ptr = PL_markstack; 648 PL_markstack_ptr = PL_markstack;
463 PL_markstack_max = PL_markstack + 16; 649 PL_markstack_max = PL_markstack + 16;
464 650
465#ifdef SET_MARK_OFFSET 651#ifdef SET_MARK_OFFSET
466 SET_MARK_OFFSET; 652 SET_MARK_OFFSET;
467#endif 653#endif
468 654
469 New(54,PL_scopestack,16,I32); 655 New(54,PL_scopestack,8,I32);
470 PL_scopestack_ix = 0; 656 PL_scopestack_ix = 0;
471 PL_scopestack_max = 16; 657 PL_scopestack_max = 8;
472 658
473 New(54,PL_savestack,96,ANY); 659 New(54,PL_savestack,24,ANY);
474 PL_savestack_ix = 0; 660 PL_savestack_ix = 0;
475 PL_savestack_max = 96; 661 PL_savestack_max = 24;
476 662
477#if PERL_VERSION < 9 663#if !PERL_VERSION_ATLEAST (5,10,0)
478 New(54,PL_retstack,8,OP*); 664 New(54,PL_retstack,4,OP*);
479 PL_retstack_ix = 0; 665 PL_retstack_ix = 0;
480 PL_retstack_max = 8; 666 PL_retstack_max = 4;
481#endif 667#endif
482
483 UNLOCK;
484} 668}
669#endif
485 670
486/* 671/*
487 * destroy the stacks, the callchain etc... 672 * destroy the stacks, the callchain etc...
488 */ 673 */
489static void 674static void
490destroy_stacks(pTHX) 675coro_destruct_stacks (pTHX)
491{ 676{
492 if (!IN_DESTRUCT)
493 {
494 /* is this ugly, I ask? */
495 LEAVE_SCOPE (0);
496
497 /* sure it is, but more important: is it correct?? :/ */
498 FREETMPS;
499
500 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
501 }
502
503 while (PL_curstackinfo->si_next) 677 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next; 678 PL_curstackinfo = PL_curstackinfo->si_next;
505 679
506 while (PL_curstackinfo) 680 while (PL_curstackinfo)
507 { 681 {
508 PERL_SI *p = PL_curstackinfo->si_prev; 682 PERL_SI *p = PL_curstackinfo->si_prev;
509 683
510 { /*D*//*remove*/
511 dSP;
512 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513 PUTBACK; /* possibly superfluous */
514 }
515
516 if (!IN_DESTRUCT) 684 if (!IN_DESTRUCT)
517 {
518 dounwind (-1);/*D*//*remove*/
519 SvREFCNT_dec (PL_curstackinfo->si_stack); 685 SvREFCNT_dec (PL_curstackinfo->si_stack);
520 }
521 686
522 Safefree (PL_curstackinfo->si_cxstack); 687 Safefree (PL_curstackinfo->si_cxstack);
523 Safefree (PL_curstackinfo); 688 Safefree (PL_curstackinfo);
524 PL_curstackinfo = p; 689 PL_curstackinfo = p;
525 } 690 }
526 691
527 Safefree (PL_tmps_stack); 692 Safefree (PL_tmps_stack);
528 Safefree (PL_markstack); 693 Safefree (PL_markstack);
529 Safefree (PL_scopestack); 694 Safefree (PL_scopestack);
530 Safefree (PL_savestack); 695 Safefree (PL_savestack);
531#if PERL_VERSION < 9 696#if !PERL_VERSION_ATLEAST (5,10,0)
532 Safefree (PL_retstack); 697 Safefree (PL_retstack);
533#endif 698#endif
534} 699}
535 700
701#define CORO_RSS \
702 rss += sizeof (SYM (curstackinfo)); \
703 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
705 rss += SYM (tmps_max) * sizeof (SV *); \
706 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
707 rss += SYM (scopestack_max) * sizeof (I32); \
708 rss += SYM (savestack_max) * sizeof (ANY);
709
710static size_t
711coro_rss (pTHX_ struct coro *coro)
712{
713 size_t rss = sizeof (*coro);
714
715 if (coro->mainstack)
716 {
717 if (coro->flags & CF_RUNNING)
718 {
719 #define SYM(sym) PL_ ## sym
720 CORO_RSS;
721 #undef SYM
722 }
723 else
724 {
725 #define SYM(sym) coro->slot->sym
726 CORO_RSS;
727 #undef SYM
728 }
729 }
730
731 return rss;
732}
733
734/** coroutine stack handling ************************************************/
735
736static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
737static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
738static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
739
740/* apparently < 5.8.8 */
741#ifndef MgPV_nolen_const
742#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
743 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
744 (const char*)(mg)->mg_ptr)
745#endif
746
747/*
748 * This overrides the default magic get method of %SIG elements.
749 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
750 * and instead of tryign to save and restore the hash elements, we just provide
751 * readback here.
752 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
753 * not expecting this to actually change the hook. This is a potential problem
754 * when a schedule happens then, but we ignore this.
755 */
536static void 756static int
537setup_coro (struct coro *coro) 757coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
758{
759 const char *s = MgPV_nolen_const (mg);
760
761 if (*s == '_')
762 {
763 SV **svp = 0;
764
765 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
766 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
767
768 if (svp)
769 {
770 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
771 return 0;
772 }
773 }
774
775 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
776}
777
778static int
779coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
780{
781 const char *s = MgPV_nolen_const (mg);
782
783 if (*s == '_')
784 {
785 SV **svp = 0;
786
787 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
788 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
789
790 if (svp)
791 {
792 SV *old = *svp;
793 *svp = 0;
794 SvREFCNT_dec (old);
795 return 0;
796 }
797 }
798
799 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
800}
801
802static int
803coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
804{
805 const char *s = MgPV_nolen_const (mg);
806
807 if (*s == '_')
808 {
809 SV **svp = 0;
810
811 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
812 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
813
814 if (svp)
815 {
816 SV *old = *svp;
817 *svp = newSVsv (sv);
818 SvREFCNT_dec (old);
819 return 0;
820 }
821 }
822
823 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
824}
825
826static void
827prepare_nop (pTHX_ struct coro_transfer_args *ta)
828{
829 /* kind of mega-hacky, but works */
830 ta->next = ta->prev = (struct coro *)ta;
831}
832
833static int
834slf_check_nop (pTHX_ struct CoroSLF *frame)
835{
836 return 0;
837}
838
839static UNOP coro_setup_op;
840
841static void NOINLINE /* noinline to keep it out of the transfer fast path */
842coro_setup (pTHX_ struct coro *coro)
538{ 843{
539 /* 844 /*
540 * emulate part of the perl startup here. 845 * emulate part of the perl startup here.
541 */ 846 */
542 dTHX;
543 dSP;
544 UNOP myop;
545 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546
547 coro_init_stacks (aTHX); 847 coro_init_stacks (aTHX);
548 /*PL_curcop = 0;*/ 848
549 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 849 PL_runops = RUNOPS_DEFAULT;
850 PL_curcop = &PL_compiling;
851 PL_in_eval = EVAL_NULL;
852 PL_comppad = 0;
853 PL_curpm = 0;
854 PL_curpad = 0;
855 PL_localizing = 0;
856 PL_dirty = 0;
857 PL_restartop = 0;
858#if PERL_VERSION_ATLEAST (5,10,0)
859 PL_parser = 0;
860#endif
861
862 /* recreate the die/warn hooks */
863 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
864 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
865
866 GvSV (PL_defgv) = newSV (0);
867 GvAV (PL_defgv) = coro->args; coro->args = 0;
868 GvSV (PL_errgv) = newSV (0);
869 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
870 PL_rs = newSVsv (GvSV (irsgv));
871 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
872
873 {
874 dSP;
875 UNOP myop;
876
877 Zero (&myop, 1, UNOP);
878 myop.op_next = Nullop;
879 myop.op_type = OP_ENTERSUB;
880 myop.op_flags = OPf_WANT_VOID;
881
882 PUSHMARK (SP);
883 PUSHs ((SV *)coro->startcv);
884 PUTBACK;
885 PL_op = (OP *)&myop;
886 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
887 }
888
889 /* this newly created coroutine might be run on an existing cctx which most
890 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
891 */
892 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
893 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
894
895 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
896 coro_setup_op.op_next = PL_op;
897 coro_setup_op.op_type = OP_CUSTOM;
898 coro_setup_op.op_ppaddr = pp_slf;
899 /* no flags etc. required, as an init function won't be called */
900
901 PL_op = (OP *)&coro_setup_op;
902
903 /* copy throw, in case it was set before coro_setup */
904 CORO_THROW = coro->except;
905}
906
907static void
908coro_destruct (pTHX_ struct coro *coro)
909{
910 if (!IN_DESTRUCT)
911 {
912 /* restore all saved variables and stuff */
913 LEAVE_SCOPE (0);
914 assert (PL_tmps_floor == -1);
915
916 /* free all temporaries */
917 FREETMPS;
918 assert (PL_tmps_ix == -1);
919
920 /* unwind all extra stacks */
921 POPSTACK_TO (PL_mainstack);
922
923 /* unwind main stack */
924 dounwind (-1);
925 }
926
927 SvREFCNT_dec (GvSV (PL_defgv));
550 SvREFCNT_dec (GvAV (PL_defgv)); 928 SvREFCNT_dec (GvAV (PL_defgv));
551 GvAV (PL_defgv) = coro->args; coro->args = 0; 929 SvREFCNT_dec (GvSV (PL_errgv));
930 SvREFCNT_dec (PL_defoutgv);
931 SvREFCNT_dec (PL_rs);
932 SvREFCNT_dec (GvSV (irsgv));
552 933
553 SPAGAIN; 934 SvREFCNT_dec (PL_diehook);
935 SvREFCNT_dec (PL_warnhook);
936
937 SvREFCNT_dec (coro->saved_deffh);
938 SvREFCNT_dec (coro->rouse_cb);
939 SvREFCNT_dec (coro->invoke_cb);
940 SvREFCNT_dec (coro->invoke_av);
554 941
555 Zero (&myop, 1, UNOP); 942 coro_destruct_stacks (aTHX);
556 myop.op_next = Nullop;
557 myop.op_flags = OPf_WANT_VOID;
558
559 PL_op = (OP *)&myop;
560
561 PUSHMARK(SP);
562 XPUSHs (sub_init);
563 PUTBACK;
564 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565 SPAGAIN;
566
567 ENTER; /* necessary e.g. for dounwind */
568} 943}
569 944
570static void 945INLINE void
571transfer_tail () 946free_coro_mortal (pTHX)
572{ 947{
573 if (coro_mortal) 948 if (expect_true (coro_mortal))
574 { 949 {
575 SvREFCNT_dec (coro_mortal); 950 SvREFCNT_dec (coro_mortal);
576 coro_mortal = 0; 951 coro_mortal = 0;
577 } 952 }
578
579 UNLOCK;
580} 953}
581 954
582static void 955static int
583coro_run (void *arg) 956runops_trace (pTHX)
584{ 957{
585 /* 958 COP *oldcop = 0;
586 * this is a _very_ stripped down perl interpreter ;) 959 int oldcxix = -2;
587 */ 960 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
588 dTHX; 961 coro_cctx *cctx = coro->cctx;
589 962
590 transfer_tail (); 963 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
964 {
965 PERL_ASYNC_CHECK ();
591 966
967 if (cctx->flags & CC_TRACE_ALL)
968 {
969 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
970 {
971 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
972 SV **bot, **top;
973 AV *av = newAV (); /* return values */
974 SV **cb;
975 dSP;
976
977 GV *gv = CvGV (cx->blk_sub.cv);
978 SV *fullname = sv_2mortal (newSV (0));
979 if (isGV (gv))
980 gv_efullname3 (fullname, gv, 0);
981
982 bot = PL_stack_base + cx->blk_oldsp + 1;
983 top = cx->blk_gimme == G_ARRAY ? SP + 1
984 : cx->blk_gimme == G_SCALAR ? bot + 1
985 : bot;
986
987 av_extend (av, top - bot);
988 while (bot < top)
989 av_push (av, SvREFCNT_inc_NN (*bot++));
990
991 PL_runops = RUNOPS_DEFAULT;
992 ENTER;
993 SAVETMPS;
994 EXTEND (SP, 3);
995 PUSHMARK (SP);
996 PUSHs (&PL_sv_no);
997 PUSHs (fullname);
998 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
999 PUTBACK;
1000 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1001 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1002 SPAGAIN;
1003 FREETMPS;
1004 LEAVE;
1005 PL_runops = runops_trace;
1006 }
1007
1008 if (oldcop != PL_curcop)
1009 {
1010 oldcop = PL_curcop;
1011
1012 if (PL_curcop != &PL_compiling)
1013 {
1014 SV **cb;
1015
1016 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1017 {
1018 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1019
1020 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1021 {
1022 runops_proc_t old_runops = PL_runops;
1023 dSP;
1024 GV *gv = CvGV (cx->blk_sub.cv);
1025 SV *fullname = sv_2mortal (newSV (0));
1026
1027 if (isGV (gv))
1028 gv_efullname3 (fullname, gv, 0);
1029
1030 PL_runops = RUNOPS_DEFAULT;
1031 ENTER;
1032 SAVETMPS;
1033 EXTEND (SP, 3);
1034 PUSHMARK (SP);
1035 PUSHs (&PL_sv_yes);
1036 PUSHs (fullname);
1037 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1038 PUTBACK;
1039 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1040 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1041 SPAGAIN;
1042 FREETMPS;
1043 LEAVE;
1044 PL_runops = runops_trace;
1045 }
1046
1047 oldcxix = cxstack_ix;
1048 }
1049
1050 if (cctx->flags & CC_TRACE_LINE)
1051 {
1052 dSP;
1053
1054 PL_runops = RUNOPS_DEFAULT;
1055 ENTER;
1056 SAVETMPS;
1057 EXTEND (SP, 3);
1058 PL_runops = RUNOPS_DEFAULT;
1059 PUSHMARK (SP);
1060 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1061 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1062 PUTBACK;
1063 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1064 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1065 SPAGAIN;
1066 FREETMPS;
1067 LEAVE;
1068 PL_runops = runops_trace;
1069 }
1070 }
1071 }
1072 }
1073 }
1074
1075 TAINT_NOT;
1076 return 0;
1077}
1078
1079static struct coro_cctx *cctx_ssl_cctx;
1080static struct CoroSLF cctx_ssl_frame;
1081
1082static void
1083slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1084{
1085 ta->prev = (struct coro *)cctx_ssl_cctx;
1086 ta->next = 0;
1087}
1088
1089static int
1090slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1091{
1092 *frame = cctx_ssl_frame;
1093
1094 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1095}
1096
1097/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1098static void NOINLINE
1099cctx_prepare (pTHX_ coro_cctx *cctx)
1100{
592 PL_top_env = &PL_start_env; 1101 PL_top_env = &PL_start_env;
593 PL_restartop = PL_op->op_next; 1102
1103 if (cctx->flags & CC_TRACE)
1104 PL_runops = runops_trace;
1105
1106 /* we already must be executing an SLF op, there is no other valid way
1107 * that can lead to creation of a new cctx */
1108 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1109 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1110
1111 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1112 cctx_ssl_cctx = cctx;
1113 cctx_ssl_frame = slf_frame;
1114
1115 slf_frame.prepare = slf_prepare_set_stacklevel;
1116 slf_frame.check = slf_check_set_stacklevel;
1117}
1118
1119/* the tail of transfer: execute stuff we can only do after a transfer */
1120INLINE void
1121transfer_tail (pTHX)
1122{
1123 free_coro_mortal (aTHX);
1124}
1125
1126/*
1127 * this is a _very_ stripped down perl interpreter ;)
1128 */
1129static void
1130cctx_run (void *arg)
1131{
1132#ifdef USE_ITHREADS
1133# if CORO_PTHREAD
1134 PERL_SET_CONTEXT (coro_thx);
1135# endif
1136#endif
1137 {
1138 dTHX;
1139
1140 /* normally we would need to skip the entersub here */
1141 /* not doing so will re-execute it, which is exactly what we want */
1142 /* PL_nop = PL_nop->op_next */
1143
1144 /* inject a fake subroutine call to cctx_init */
1145 cctx_prepare (aTHX_ (coro_cctx *)arg);
1146
1147 /* cctx_run is the alternative tail of transfer() */
1148 transfer_tail (aTHX);
1149
594 /* somebody will hit me for both perl_run and PL_restart_top */ 1150 /* somebody or something will hit me for both perl_run and PL_restartop */
595 perl_run (aTHX_ PERL_GET_CONTEXT); 1151 PL_restartop = PL_op;
1152 perl_run (PL_curinterp);
1153 /*
1154 * Unfortunately, there is no way to get at the return values of the
1155 * coro body here, as perl_run destroys these
1156 */
596 1157
597 abort (); 1158 /*
1159 * If perl-run returns we assume exit() was being called or the coro
1160 * fell off the end, which seems to be the only valid (non-bug)
1161 * reason for perl_run to return. We try to exit by jumping to the
1162 * bootstrap-time "top" top_env, as we cannot restore the "main"
1163 * coroutine as Coro has no such concept
1164 */
1165 PL_top_env = main_top_env;
1166 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1167 }
598} 1168}
599 1169
600static coro_stack * 1170static coro_cctx *
601stack_new () 1171cctx_new ()
602{ 1172{
603 coro_stack *stack; 1173 coro_cctx *cctx;
604 1174
1175 ++cctx_count;
605 New (0, stack, 1, coro_stack); 1176 New (0, cctx, 1, coro_cctx);
1177
1178 cctx->gen = cctx_gen;
1179 cctx->flags = 0;
1180 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1181
1182 return cctx;
1183}
1184
1185/* create a new cctx only suitable as source */
1186static coro_cctx *
1187cctx_new_empty ()
1188{
1189 coro_cctx *cctx = cctx_new ();
1190
1191 cctx->sptr = 0;
1192 coro_create (&cctx->cctx, 0, 0, 0, 0);
1193
1194 return cctx;
1195}
1196
1197/* create a new cctx suitable as destination/running a perl interpreter */
1198static coro_cctx *
1199cctx_new_run ()
1200{
1201 coro_cctx *cctx = cctx_new ();
1202 void *stack_start;
1203 size_t stack_size;
606 1204
607#if HAVE_MMAP 1205#if HAVE_MMAP
608 1206 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
609 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 1207 /* mmap supposedly does allocate-on-write for us */
610 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1208 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611 1209
612 if (stack->sptr == (void *)-1) 1210 if (cctx->sptr != (void *)-1)
1211 {
1212 #if CORO_STACKGUARD
1213 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1214 #endif
1215 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1216 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1217 cctx->flags |= CC_MAPPED;
613 { 1218 }
614 fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n"); 1219 else
1220#endif
1221 {
1222 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1223 New (0, cctx->sptr, cctx_stacksize, long);
1224
1225 if (!cctx->sptr)
1226 {
1227 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
615 _exit (EXIT_FAILURE); 1228 _exit (EXIT_FAILURE);
1229 }
1230
1231 stack_start = cctx->sptr;
1232 stack_size = cctx->ssize;
1233 }
1234
1235 #if CORO_USE_VALGRIND
1236 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1237 #endif
1238
1239 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1240
1241 return cctx;
1242}
1243
1244static void
1245cctx_destroy (coro_cctx *cctx)
1246{
1247 if (!cctx)
1248 return;
1249
1250 --cctx_count;
1251 coro_destroy (&cctx->cctx);
1252
1253 /* coro_transfer creates new, empty cctx's */
1254 if (cctx->sptr)
616 } 1255 {
1256 #if CORO_USE_VALGRIND
1257 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1258 #endif
617 1259
618 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1260#if HAVE_MMAP
1261 if (cctx->flags & CC_MAPPED)
1262 munmap (cctx->sptr, cctx->ssize);
1263 else
1264#endif
1265 Safefree (cctx->sptr);
1266 }
619 1267
1268 Safefree (cctx);
1269}
1270
1271/* wether this cctx should be destructed */
1272#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1273
1274static coro_cctx *
1275cctx_get (pTHX)
1276{
1277 while (expect_true (cctx_first))
1278 {
1279 coro_cctx *cctx = cctx_first;
1280 cctx_first = cctx->next;
1281 --cctx_idle;
1282
1283 if (expect_true (!CCTX_EXPIRED (cctx)))
1284 return cctx;
1285
1286 cctx_destroy (cctx);
1287 }
1288
1289 return cctx_new_run ();
1290}
1291
1292static void
1293cctx_put (coro_cctx *cctx)
1294{
1295 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1296
1297 /* free another cctx if overlimit */
1298 if (expect_false (cctx_idle >= cctx_max_idle))
1299 {
1300 coro_cctx *first = cctx_first;
1301 cctx_first = first->next;
1302 --cctx_idle;
1303
1304 cctx_destroy (first);
1305 }
1306
1307 ++cctx_idle;
1308 cctx->next = cctx_first;
1309 cctx_first = cctx;
1310}
1311
1312/** coroutine switching *****************************************************/
1313
1314static void
1315transfer_check (pTHX_ struct coro *prev, struct coro *next)
1316{
1317 /* TODO: throwing up here is considered harmful */
1318
1319 if (expect_true (prev != next))
1320 {
1321 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1322 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1323
1324 if (expect_false (next->flags & CF_RUNNING))
1325 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1326
1327 if (expect_false (next->flags & CF_DESTROYED))
1328 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1329
1330#if !PERL_VERSION_ATLEAST (5,10,0)
1331 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1332 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1333#endif
1334 }
1335}
1336
1337/* always use the TRANSFER macro */
1338static void NOINLINE /* noinline so we have a fixed stackframe */
1339transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1340{
1341 dSTACKLEVEL;
1342
1343 /* sometimes transfer is only called to set idle_sp */
1344 if (expect_false (!next))
1345 {
1346 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1347 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1348 }
1349 else if (expect_true (prev != next))
1350 {
1351 coro_cctx *prev__cctx;
1352
1353 if (expect_false (prev->flags & CF_NEW))
1354 {
1355 /* create a new empty/source context */
1356 prev->cctx = cctx_new_empty ();
1357 prev->flags &= ~CF_NEW;
1358 prev->flags |= CF_RUNNING;
1359 }
1360
1361 prev->flags &= ~CF_RUNNING;
1362 next->flags |= CF_RUNNING;
1363
1364 /* first get rid of the old state */
1365 save_perl (aTHX_ prev);
1366
1367 if (expect_false (next->flags & CF_NEW))
1368 {
1369 /* need to start coroutine */
1370 next->flags &= ~CF_NEW;
1371 /* setup coroutine call */
1372 coro_setup (aTHX_ next);
1373 }
1374 else
1375 load_perl (aTHX_ next);
1376
1377 prev__cctx = prev->cctx;
1378
1379 /* possibly untie and reuse the cctx */
1380 if (expect_true (
1381 prev__cctx->idle_sp == STACKLEVEL
1382 && !(prev__cctx->flags & CC_TRACE)
1383 && !force_cctx
1384 ))
1385 {
1386 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1387 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1388
1389 prev->cctx = 0;
1390
1391 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1392 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1393 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1394 if (!next->cctx)
1395 next->cctx = cctx_get (aTHX);
1396
1397 cctx_put (prev__cctx);
1398 }
1399
1400 ++next->usecount;
1401
1402 if (expect_true (!next->cctx))
1403 next->cctx = cctx_get (aTHX);
1404
1405 if (expect_false (prev__cctx != next->cctx))
1406 {
1407 prev__cctx->top_env = PL_top_env;
1408 PL_top_env = next->cctx->top_env;
1409 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1410 }
1411
1412 transfer_tail (aTHX);
1413 }
1414}
1415
1416#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1417#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1418
1419/** high level stuff ********************************************************/
1420
1421static int
1422coro_state_destroy (pTHX_ struct coro *coro)
1423{
1424 if (coro->flags & CF_DESTROYED)
1425 return 0;
1426
1427 if (coro->on_destroy)
1428 coro->on_destroy (aTHX_ coro);
1429
1430 coro->flags |= CF_DESTROYED;
1431
1432 if (coro->flags & CF_READY)
1433 {
1434 /* reduce nready, as destroying a ready coro effectively unreadies it */
1435 /* alternative: look through all ready queues and remove the coro */
1436 --coro_nready;
1437 }
1438 else
1439 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1440
1441 if (coro->mainstack && coro->mainstack != main_mainstack)
1442 {
1443 struct coro temp;
1444
1445 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1446
1447 save_perl (aTHX_ &temp);
1448 load_perl (aTHX_ coro);
1449
1450 coro_destruct (aTHX_ coro);
1451
1452 load_perl (aTHX_ &temp);
1453
1454 coro->slot = 0;
1455 }
1456
1457 cctx_destroy (coro->cctx);
1458 SvREFCNT_dec (coro->startcv);
1459 SvREFCNT_dec (coro->args);
1460 SvREFCNT_dec (CORO_THROW);
1461
1462 if (coro->next) coro->next->prev = coro->prev;
1463 if (coro->prev) coro->prev->next = coro->next;
1464 if (coro == coro_first) coro_first = coro->next;
1465
1466 return 1;
1467}
1468
1469static int
1470coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1471{
1472 struct coro *coro = (struct coro *)mg->mg_ptr;
1473 mg->mg_ptr = 0;
1474
1475 coro->hv = 0;
1476
1477 if (--coro->refcnt < 0)
1478 {
1479 coro_state_destroy (aTHX_ coro);
1480 Safefree (coro);
1481 }
1482
1483 return 0;
1484}
1485
1486static int
1487coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1488{
1489 struct coro *coro = (struct coro *)mg->mg_ptr;
1490
1491 ++coro->refcnt;
1492
1493 return 0;
1494}
1495
1496static MGVTBL coro_state_vtbl = {
1497 0, 0, 0, 0,
1498 coro_state_free,
1499 0,
1500#ifdef MGf_DUP
1501 coro_state_dup,
620#else 1502#else
621 1503# define MGf_DUP 0
622 stack->ssize = STACKSIZE * (long)sizeof (long);
623 New (0, stack->sptr, STACKSIZE, long);
624
625 if (!stack->sptr)
626 {
627 fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628 _exit (EXIT_FAILURE);
629 }
630
631#endif 1504#endif
1505};
632 1506
633 coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize); 1507static void
1508prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1509{
1510 ta->prev = SvSTATE (prev_sv);
1511 ta->next = SvSTATE (next_sv);
1512 TRANSFER_CHECK (*ta);
1513}
634 1514
1515static void
1516api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1517{
1518 struct coro_transfer_args ta;
1519
1520 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1521 TRANSFER (ta, 1);
1522}
1523
1524/*****************************************************************************/
1525/* gensub: simple closure generation utility */
1526
1527#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1528
1529/* create a closure from XS, returns a code reference */
1530/* the arg can be accessed via GENSUB_ARG from the callback */
1531/* the callback must use dXSARGS/XSRETURN */
1532static SV *
1533gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1534{
1535 CV *cv = (CV *)newSV (0);
1536
1537 sv_upgrade ((SV *)cv, SVt_PVCV);
1538
1539 CvANON_on (cv);
1540 CvISXSUB_on (cv);
1541 CvXSUB (cv) = xsub;
1542 GENSUB_ARG = arg;
1543
1544 return newRV_noinc ((SV *)cv);
1545}
1546
1547/** Coro ********************************************************************/
1548
1549INLINE void
1550coro_enq (pTHX_ struct coro *coro)
1551{
1552 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1553}
1554
1555INLINE SV *
1556coro_deq (pTHX)
1557{
1558 int prio;
1559
1560 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1561 if (AvFILLp (coro_ready [prio]) >= 0)
1562 return av_shift (coro_ready [prio]);
1563
635 return stack; 1564 return 0;
636} 1565}
637 1566
638static void 1567static int
639stack_free (coro_stack *stack) 1568api_ready (pTHX_ SV *coro_sv)
640{ 1569{
641 if (!stack || stack == main_stack) 1570 struct coro *coro;
1571 SV *sv_hook;
1572 void (*xs_hook)(void);
1573
1574 if (SvROK (coro_sv))
1575 coro_sv = SvRV (coro_sv);
1576
1577 coro = SvSTATE (coro_sv);
1578
1579 if (coro->flags & CF_READY)
642 return; 1580 return 0;
643 1581
644#if HAVE_MMAP 1582 coro->flags |= CF_READY;
645 munmap (stack->sptr, stack->ssize);
646#else
647 Safefree (stack->sptr);
648#endif
649 1583
650 Safefree (stack); 1584 sv_hook = coro_nready ? 0 : coro_readyhook;
651} 1585 xs_hook = coro_nready ? 0 : coroapi.readyhook;
652 1586
653static coro_stack *stack_first; 1587 coro_enq (aTHX_ coro);
1588 ++coro_nready;
654 1589
655static void 1590 if (sv_hook)
656stack_get (struct coro *coro) 1591 {
657{ 1592 dSP;
658 if (stack_first) 1593
1594 ENTER;
1595 SAVETMPS;
1596
1597 PUSHMARK (SP);
1598 PUTBACK;
1599 call_sv (sv_hook, G_VOID | G_DISCARD);
1600
1601 FREETMPS;
1602 LEAVE;
659 { 1603 }
660 coro->stack = stack_first; 1604
661 stack_first = stack_first->next; 1605 if (xs_hook)
1606 xs_hook ();
1607
1608 return 1;
1609}
1610
1611static int
1612api_is_ready (pTHX_ SV *coro_sv)
1613{
1614 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1615}
1616
1617INLINE void
1618prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1619{
1620 SV *prev_sv, *next_sv;
1621
1622 for (;;)
1623 {
1624 next_sv = coro_deq (aTHX);
1625
1626 /* nothing to schedule: call the idle handler */
1627 if (expect_false (!next_sv))
1628 {
1629 dSP;
1630
1631 ENTER;
1632 SAVETMPS;
1633
1634 PUSHMARK (SP);
1635 PUTBACK;
1636 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1637
1638 FREETMPS;
1639 LEAVE;
1640 continue;
1641 }
1642
1643 ta->next = SvSTATE_hv (next_sv);
1644
1645 /* cannot transfer to destroyed coros, skip and look for next */
1646 if (expect_false (ta->next->flags & CF_DESTROYED))
1647 {
1648 SvREFCNT_dec (next_sv);
1649 /* coro_nready has already been taken care of by destroy */
1650 continue;
1651 }
1652
1653 --coro_nready;
1654 break;
1655 }
1656
1657 /* free this only after the transfer */
1658 prev_sv = SvRV (coro_current);
1659 ta->prev = SvSTATE_hv (prev_sv);
1660 TRANSFER_CHECK (*ta);
1661 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1662 ta->next->flags &= ~CF_READY;
1663 SvRV_set (coro_current, next_sv);
1664
1665 free_coro_mortal (aTHX);
1666 coro_mortal = prev_sv;
1667}
1668
1669INLINE void
1670prepare_cede (pTHX_ struct coro_transfer_args *ta)
1671{
1672 api_ready (aTHX_ coro_current);
1673 prepare_schedule (aTHX_ ta);
1674}
1675
1676INLINE void
1677prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1678{
1679 SV *prev = SvRV (coro_current);
1680
1681 if (coro_nready)
1682 {
1683 prepare_schedule (aTHX_ ta);
1684 api_ready (aTHX_ prev);
662 } 1685 }
663 else 1686 else
664 coro->stack = stack_new (); 1687 prepare_nop (aTHX_ ta);
665} 1688}
666 1689
1690static void
1691api_schedule (pTHX)
1692{
1693 struct coro_transfer_args ta;
1694
1695 prepare_schedule (aTHX_ &ta);
1696 TRANSFER (ta, 1);
1697}
1698
667static void 1699static int
668stack_put (coro_stack *stack) 1700api_cede (pTHX)
669{ 1701{
670 stack->next = stack_first; 1702 struct coro_transfer_args ta;
671 stack_first = stack;
672}
673 1703
674/* never call directly, always through the coro_state_transfer global variable */ 1704 prepare_cede (aTHX_ &ta);
1705
1706 if (expect_true (ta.prev != ta.next))
1707 {
1708 TRANSFER (ta, 1);
1709 return 1;
1710 }
1711 else
1712 return 0;
1713}
1714
675static void 1715static int
676transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1716api_cede_notself (pTHX)
677{ 1717{
678 dSTACKLEVEL; 1718 if (coro_nready)
1719 {
1720 struct coro_transfer_args ta;
679 1721
680 /* sometimes transfer is only called to set idle_sp */ 1722 prepare_cede_notself (aTHX_ &ta);
681 if (!prev->stack->idle_sp) 1723 TRANSFER (ta, 1);
682 prev->stack->idle_sp = stacklevel; 1724 return 1;
1725 }
1726 else
1727 return 0;
1728}
683 1729
684 LOCK; 1730static void
1731api_trace (pTHX_ SV *coro_sv, int flags)
1732{
1733 struct coro *coro = SvSTATE (coro_sv);
685 1734
686 if (prev != next) 1735 if (flags & CC_TRACE)
1736 {
1737 if (!coro->cctx)
1738 coro->cctx = cctx_new_run ();
1739 else if (!(coro->cctx->flags & CC_TRACE))
1740 croak ("cannot enable tracing on coroutine with custom stack,");
1741
1742 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1743 }
1744 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1745 {
1746 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1747
1748 if (coro->flags & CF_RUNNING)
1749 PL_runops = RUNOPS_DEFAULT;
1750 else
1751 coro->slot->runops = RUNOPS_DEFAULT;
1752 }
1753}
1754
1755/*****************************************************************************/
1756/* async pool handler */
1757
1758static int
1759slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1760{
1761 HV *hv = (HV *)SvRV (coro_current);
1762 struct coro *coro = (struct coro *)frame->data;
1763
1764 if (!coro->invoke_cb)
1765 return 1; /* loop till we have invoke */
1766 else
1767 {
1768 hv_store (hv, "desc", sizeof ("desc") - 1,
1769 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1770
1771 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1772
687 { 1773 {
688 coro_stack *prev_stack = prev->stack; 1774 dSP;
1775 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1776 PUTBACK;
1777 }
689 1778
690 /* possibly "free" the stack */ 1779 SvREFCNT_dec (GvAV (PL_defgv));
691 if (prev_stack->idle_sp == stacklevel) 1780 GvAV (PL_defgv) = coro->invoke_av;
1781 coro->invoke_av = 0;
1782
1783 return 0;
1784 }
1785}
1786
1787static void
1788slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1789{
1790 HV *hv = (HV *)SvRV (coro_current);
1791 struct coro *coro = SvSTATE_hv ((SV *)hv);
1792
1793 if (expect_true (coro->saved_deffh))
1794 {
1795 /* subsequent iteration */
1796 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1797 coro->saved_deffh = 0;
1798
1799 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1800 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
692 { 1801 {
693 stack_put (prev_stack); 1802 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
694 prev->stack = 0; 1803 coro->invoke_av = newAV ();
695 }
696 1804
697 if (!next->mainstack) 1805 frame->prepare = prepare_nop;
698 {
699 /* first get rid of the old state */
700 SAVE (prev, -1);
701 /* setup coroutine call */
702 setup_coro (next);
703 next->stack = 0;
704 } 1806 }
705 else 1807 else
706 { 1808 {
707 SAVE (prev, flags); 1809 av_clear (GvAV (PL_defgv));
708 LOAD (next); 1810 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1811
1812 coro->prio = 0;
1813
1814 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1815 api_trace (aTHX_ coro_current, 0);
1816
1817 frame->prepare = prepare_schedule;
1818 av_push (av_async_pool, SvREFCNT_inc (hv));
709 } 1819 }
710
711 if (!next->stack)
712 stack_get (next);
713
714 if (prev_stack != next->stack)
715 coro_transfer (&prev_stack->cctx, &next->stack->cctx);
716 }
717
718 transfer_tail ();
719}
720
721/* use this function pointer to call the above function */
722/* this is done to increase chances of the compiler not inlining the call */
723void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
724
725static void
726coro_state_destroy (struct coro *coro)
727{
728 if (coro->refcnt--)
729 return;
730
731 if (coro->mainstack && coro->mainstack != main_mainstack)
732 { 1820 }
733 struct coro temp; 1821 else
734
735 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
736 LOAD (aTHX_ coro);
737
738 destroy_stacks (aTHX);
739
740 LOAD ((&temp)); /* this will get rid of defsv etc.. */
741
742 coro->mainstack = 0;
743 } 1822 {
1823 /* first iteration, simply fall through */
1824 frame->prepare = prepare_nop;
1825 }
744 1826
745 stack_free (coro->stack); 1827 frame->check = slf_check_pool_handler;
1828 frame->data = (void *)coro;
1829}
1830
1831/*****************************************************************************/
1832/* rouse callback */
1833
1834#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1835
1836static void
1837coro_rouse_callback (pTHX_ CV *cv)
1838{
1839 dXSARGS;
1840 SV *data = (SV *)GENSUB_ARG;
1841
1842 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1843 {
1844 /* first call, set args */
1845 AV *av = newAV ();
1846 SV *coro = SvRV (data);
1847
1848 SvRV_set (data, (SV *)av);
1849 api_ready (aTHX_ coro);
746 SvREFCNT_dec (coro->args); 1850 SvREFCNT_dec (coro);
747 Safefree (coro); 1851
1852 /* better take a full copy of the arguments */
1853 while (items--)
1854 av_store (av, items, newSVsv (ST (items)));
1855 }
1856
1857 XSRETURN_EMPTY;
748} 1858}
749 1859
750static int 1860static int
751coro_state_clear (SV *sv, MAGIC *mg) 1861slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
752{ 1862{
753 struct coro *coro = (struct coro *)mg->mg_ptr; 1863 SV *data = (SV *)frame->data;
754 mg->mg_ptr = 0; 1864
1865 if (CORO_THROW)
1866 return 0;
755 1867
756 coro_state_destroy (coro); 1868 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1869 return 1;
1870
1871 /* now push all results on the stack */
1872 {
1873 dSP;
1874 AV *av = (AV *)SvRV (data);
1875 int i;
1876
1877 EXTEND (SP, AvFILLp (av) + 1);
1878 for (i = 0; i <= AvFILLp (av); ++i)
1879 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1880
1881 /* we have stolen the elements, so ste length to zero and free */
1882 AvFILLp (av) = -1;
1883 av_undef (av);
1884
1885 PUTBACK;
1886 }
757 1887
758 return 0; 1888 return 0;
759} 1889}
760 1890
1891static void
1892slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1893{
1894 SV *cb;
1895
1896 if (items)
1897 cb = arg [0];
1898 else
1899 {
1900 struct coro *coro = SvSTATE_current;
1901
1902 if (!coro->rouse_cb)
1903 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1904
1905 cb = sv_2mortal (coro->rouse_cb);
1906 coro->rouse_cb = 0;
1907 }
1908
1909 if (!SvROK (cb)
1910 || SvTYPE (SvRV (cb)) != SVt_PVCV
1911 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1912 croak ("Coro::rouse_wait called with illegal callback argument,");
1913
1914 {
1915 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1916 SV *data = (SV *)GENSUB_ARG;
1917
1918 frame->data = (void *)data;
1919 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1920 frame->check = slf_check_rouse_wait;
1921 }
1922}
1923
1924static SV *
1925coro_new_rouse_cb (pTHX)
1926{
1927 HV *hv = (HV *)SvRV (coro_current);
1928 struct coro *coro = SvSTATE_hv (hv);
1929 SV *data = newRV_inc ((SV *)hv);
1930 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
1931
1932 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
1933 SvREFCNT_dec (data); /* magicext increases the refcount */
1934
1935 SvREFCNT_dec (coro->rouse_cb);
1936 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1937
1938 return cb;
1939}
1940
1941/*****************************************************************************/
1942/* schedule-like-function opcode (SLF) */
1943
1944static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1945static const CV *slf_cv;
1946static SV **slf_argv;
1947static int slf_argc, slf_arga; /* count, allocated */
1948static I32 slf_ax; /* top of stack, for restore */
1949
1950/* this restores the stack in the case we patched the entersub, to */
1951/* recreate the stack frame as perl will on following calls */
1952/* since entersub cleared the stack */
1953static OP *
1954pp_restore (pTHX)
1955{
1956 int i;
1957 SV **SP = PL_stack_base + slf_ax;
1958
1959 PUSHMARK (SP);
1960
1961 EXTEND (SP, slf_argc + 1);
1962
1963 for (i = 0; i < slf_argc; ++i)
1964 PUSHs (sv_2mortal (slf_argv [i]));
1965
1966 PUSHs ((SV *)CvGV (slf_cv));
1967
1968 RETURNOP (slf_restore.op_first);
1969}
1970
1971static void
1972slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1973{
1974 SV **arg = (SV **)slf_frame.data;
1975
1976 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1977}
1978
1979static void
1980slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1981{
1982 if (items != 2)
1983 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1984
1985 frame->prepare = slf_prepare_transfer;
1986 frame->check = slf_check_nop;
1987 frame->data = (void *)arg; /* let's hope it will stay valid */
1988}
1989
1990static void
1991slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1992{
1993 frame->prepare = prepare_schedule;
1994 frame->check = slf_check_nop;
1995}
1996
1997static void
1998slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1999{
2000 frame->prepare = prepare_cede;
2001 frame->check = slf_check_nop;
2002}
2003
2004static void
2005slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2006{
2007 frame->prepare = prepare_cede_notself;
2008 frame->check = slf_check_nop;
2009}
2010
2011/*
2012 * these not obviously related functions are all rolled into one
2013 * function to increase chances that they all will call transfer with the same
2014 * stack offset
2015 * SLF stands for "schedule-like-function".
2016 */
2017static OP *
2018pp_slf (pTHX)
2019{
2020 I32 checkmark; /* mark SP to see how many elements check has pushed */
2021
2022 /* set up the slf frame, unless it has already been set-up */
2023 /* the latter happens when a new coro has been started */
2024 /* or when a new cctx was attached to an existing coroutine */
2025 if (expect_true (!slf_frame.prepare))
2026 {
2027 /* first iteration */
2028 dSP;
2029 SV **arg = PL_stack_base + TOPMARK + 1;
2030 int items = SP - arg; /* args without function object */
2031 SV *gv = *sp;
2032
2033 /* do a quick consistency check on the "function" object, and if it isn't */
2034 /* for us, divert to the real entersub */
2035 if (SvTYPE (gv) != SVt_PVGV
2036 || !GvCV (gv)
2037 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2038 return PL_ppaddr[OP_ENTERSUB](aTHX);
2039
2040 if (!(PL_op->op_flags & OPf_STACKED))
2041 {
2042 /* ampersand-form of call, use @_ instead of stack */
2043 AV *av = GvAV (PL_defgv);
2044 arg = AvARRAY (av);
2045 items = AvFILLp (av) + 1;
2046 }
2047
2048 /* now call the init function, which needs to set up slf_frame */
2049 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2050 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2051
2052 /* pop args */
2053 SP = PL_stack_base + POPMARK;
2054
2055 PUTBACK;
2056 }
2057
2058 /* now that we have a slf_frame, interpret it! */
2059 /* we use a callback system not to make the code needlessly */
2060 /* complicated, but so we can run multiple perl coros from one cctx */
2061
2062 do
2063 {
2064 struct coro_transfer_args ta;
2065
2066 slf_frame.prepare (aTHX_ &ta);
2067 TRANSFER (ta, 0);
2068
2069 checkmark = PL_stack_sp - PL_stack_base;
2070 }
2071 while (slf_frame.check (aTHX_ &slf_frame));
2072
2073 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2074
2075 /* exception handling */
2076 if (expect_false (CORO_THROW))
2077 {
2078 SV *exception = sv_2mortal (CORO_THROW);
2079
2080 CORO_THROW = 0;
2081 sv_setsv (ERRSV, exception);
2082 croak (0);
2083 }
2084
2085 /* return value handling - mostly like entersub */
2086 /* make sure we put something on the stack in scalar context */
2087 if (GIMME_V == G_SCALAR)
2088 {
2089 dSP;
2090 SV **bot = PL_stack_base + checkmark;
2091
2092 if (sp == bot) /* too few, push undef */
2093 bot [1] = &PL_sv_undef;
2094 else if (sp != bot + 1) /* too many, take last one */
2095 bot [1] = *sp;
2096
2097 SP = bot + 1;
2098
2099 PUTBACK;
2100 }
2101
2102 return NORMAL;
2103}
2104
2105static void
2106api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2107{
2108 int i;
2109 SV **arg = PL_stack_base + ax;
2110 int items = PL_stack_sp - arg + 1;
2111
2112 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2113
2114 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2115 && PL_op->op_ppaddr != pp_slf)
2116 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2117
2118 CvFLAGS (cv) |= CVf_SLF;
2119 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2120 slf_cv = cv;
2121
2122 /* we patch the op, and then re-run the whole call */
2123 /* we have to put the same argument on the stack for this to work */
2124 /* and this will be done by pp_restore */
2125 slf_restore.op_next = (OP *)&slf_restore;
2126 slf_restore.op_type = OP_CUSTOM;
2127 slf_restore.op_ppaddr = pp_restore;
2128 slf_restore.op_first = PL_op;
2129
2130 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2131
2132 if (PL_op->op_flags & OPf_STACKED)
2133 {
2134 if (items > slf_arga)
2135 {
2136 slf_arga = items;
2137 free (slf_argv);
2138 slf_argv = malloc (slf_arga * sizeof (SV *));
2139 }
2140
2141 slf_argc = items;
2142
2143 for (i = 0; i < items; ++i)
2144 slf_argv [i] = SvREFCNT_inc (arg [i]);
2145 }
2146 else
2147 slf_argc = 0;
2148
2149 PL_op->op_ppaddr = pp_slf;
2150 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2151
2152 PL_op = (OP *)&slf_restore;
2153}
2154
2155/*****************************************************************************/
2156/* PerlIO::cede */
2157
2158typedef struct
2159{
2160 PerlIOBuf base;
2161 NV next, every;
2162} PerlIOCede;
2163
2164static IV
2165PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2166{
2167 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2168
2169 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2170 self->next = nvtime () + self->every;
2171
2172 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2173}
2174
2175static SV *
2176PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2177{
2178 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2179
2180 return newSVnv (self->every);
2181}
2182
2183static IV
2184PerlIOCede_flush (pTHX_ PerlIO *f)
2185{
2186 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2187 double now = nvtime ();
2188
2189 if (now >= self->next)
2190 {
2191 api_cede (aTHX);
2192 self->next = now + self->every;
2193 }
2194
2195 return PerlIOBuf_flush (aTHX_ f);
2196}
2197
2198static PerlIO_funcs PerlIO_cede =
2199{
2200 sizeof(PerlIO_funcs),
2201 "cede",
2202 sizeof(PerlIOCede),
2203 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2204 PerlIOCede_pushed,
2205 PerlIOBuf_popped,
2206 PerlIOBuf_open,
2207 PerlIOBase_binmode,
2208 PerlIOCede_getarg,
2209 PerlIOBase_fileno,
2210 PerlIOBuf_dup,
2211 PerlIOBuf_read,
2212 PerlIOBuf_unread,
2213 PerlIOBuf_write,
2214 PerlIOBuf_seek,
2215 PerlIOBuf_tell,
2216 PerlIOBuf_close,
2217 PerlIOCede_flush,
2218 PerlIOBuf_fill,
2219 PerlIOBase_eof,
2220 PerlIOBase_error,
2221 PerlIOBase_clearerr,
2222 PerlIOBase_setlinebuf,
2223 PerlIOBuf_get_base,
2224 PerlIOBuf_bufsiz,
2225 PerlIOBuf_get_ptr,
2226 PerlIOBuf_get_cnt,
2227 PerlIOBuf_set_ptrcnt,
2228};
2229
2230/*****************************************************************************/
2231/* Coro::Semaphore & Coro::Signal */
2232
2233static SV *
2234coro_waitarray_new (pTHX_ int count)
2235{
2236 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2237 AV *av = newAV ();
2238 SV **ary;
2239
2240 /* unfortunately, building manually saves memory */
2241 Newx (ary, 2, SV *);
2242 AvALLOC (av) = ary;
2243 /*AvARRAY (av) = ary;*/
2244 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2245 AvMAX (av) = 1;
2246 AvFILLp (av) = 0;
2247 ary [0] = newSViv (count);
2248
2249 return newRV_noinc ((SV *)av);
2250}
2251
2252/* semaphore */
2253
2254static void
2255coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2256{
2257 SV *count_sv = AvARRAY (av)[0];
2258 IV count = SvIVX (count_sv);
2259
2260 count += adjust;
2261 SvIVX (count_sv) = count;
2262
2263 /* now wake up as many waiters as are expected to lock */
2264 while (count > 0 && AvFILLp (av) > 0)
2265 {
2266 SV *cb;
2267
2268 /* swap first two elements so we can shift a waiter */
2269 AvARRAY (av)[0] = AvARRAY (av)[1];
2270 AvARRAY (av)[1] = count_sv;
2271 cb = av_shift (av);
2272
2273 if (SvOBJECT (cb))
2274 {
2275 api_ready (aTHX_ cb);
2276 --count;
2277 }
2278 else if (SvTYPE (cb) == SVt_PVCV)
2279 {
2280 dSP;
2281 PUSHMARK (SP);
2282 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2283 PUTBACK;
2284 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2285 }
2286
2287 SvREFCNT_dec (cb);
2288 }
2289}
2290
2291static void
2292coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2293{
2294 /* call $sem->adjust (0) to possibly wake up some other waiters */
2295 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2296}
2297
761static int 2298static int
762coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 2299slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
763{ 2300{
764 struct coro *coro = (struct coro *)mg->mg_ptr; 2301 AV *av = (AV *)frame->data;
2302 SV *count_sv = AvARRAY (av)[0];
765 2303
766 ++coro->refcnt; 2304 /* if we are about to throw, don't actually acquire the lock, just throw */
2305 if (CORO_THROW)
2306 return 0;
2307 else if (SvIVX (count_sv) > 0)
2308 {
2309 SvSTATE_current->on_destroy = 0;
2310
2311 if (acquire)
2312 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2313 else
2314 coro_semaphore_adjust (aTHX_ av, 0);
2315
2316 return 0;
2317 }
2318 else
2319 {
2320 int i;
2321 /* if we were woken up but can't down, we look through the whole */
2322 /* waiters list and only add us if we aren't in there already */
2323 /* this avoids some degenerate memory usage cases */
2324
2325 for (i = 1; i <= AvFILLp (av); ++i)
2326 if (AvARRAY (av)[i] == SvRV (coro_current))
2327 return 1;
2328
2329 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2330 return 1;
2331 }
2332}
2333
2334static int
2335slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2336{
2337 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2338}
2339
2340static int
2341slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2342{
2343 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2344}
2345
2346static void
2347slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2348{
2349 AV *av = (AV *)SvRV (arg [0]);
2350
2351 if (SvIVX (AvARRAY (av)[0]) > 0)
2352 {
2353 frame->data = (void *)av;
2354 frame->prepare = prepare_nop;
2355 }
2356 else
2357 {
2358 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2359
2360 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2361 frame->prepare = prepare_schedule;
2362
2363 /* to avoid race conditions when a woken-up coro gets terminated */
2364 /* we arrange for a temporary on_destroy that calls adjust (0) */
2365 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2366 }
2367}
2368
2369static void
2370slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2371{
2372 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2373 frame->check = slf_check_semaphore_down;
2374}
2375
2376static void
2377slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2378{
2379 if (items >= 2)
2380 {
2381 /* callback form */
2382 AV *av = (AV *)SvRV (arg [0]);
2383 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2384
2385 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2386
2387 if (SvIVX (AvARRAY (av)[0]) > 0)
2388 coro_semaphore_adjust (aTHX_ av, 0);
2389
2390 frame->prepare = prepare_nop;
2391 frame->check = slf_check_nop;
2392 }
2393 else
2394 {
2395 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2396 frame->check = slf_check_semaphore_wait;
2397 }
2398}
2399
2400/* signal */
2401
2402static void
2403coro_signal_wake (pTHX_ AV *av, int count)
2404{
2405 SvIVX (AvARRAY (av)[0]) = 0;
2406
2407 /* now signal count waiters */
2408 while (count > 0 && AvFILLp (av) > 0)
2409 {
2410 SV *cb;
2411
2412 /* swap first two elements so we can shift a waiter */
2413 cb = AvARRAY (av)[0];
2414 AvARRAY (av)[0] = AvARRAY (av)[1];
2415 AvARRAY (av)[1] = cb;
2416
2417 cb = av_shift (av);
2418
2419 api_ready (aTHX_ cb);
2420 sv_setiv (cb, 0); /* signal waiter */
2421 SvREFCNT_dec (cb);
2422
2423 --count;
2424 }
2425}
2426
2427static int
2428slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2429{
2430 /* if we are about to throw, also stop waiting */
2431 return SvROK ((SV *)frame->data) && !CORO_THROW;
2432}
2433
2434static void
2435slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2436{
2437 AV *av = (AV *)SvRV (arg [0]);
2438
2439 if (SvIVX (AvARRAY (av)[0]))
2440 {
2441 SvIVX (AvARRAY (av)[0]) = 0;
2442 frame->prepare = prepare_nop;
2443 frame->check = slf_check_nop;
2444 }
2445 else
2446 {
2447 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2448
2449 av_push (av, waiter);
2450
2451 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2452 frame->prepare = prepare_schedule;
2453 frame->check = slf_check_signal_wait;
2454 }
2455}
2456
2457/*****************************************************************************/
2458/* Coro::AIO */
2459
2460#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2461
2462/* helper storage struct */
2463struct io_state
2464{
2465 int errorno;
2466 I32 laststype; /* U16 in 5.10.0 */
2467 int laststatval;
2468 Stat_t statcache;
2469};
2470
2471static void
2472coro_aio_callback (pTHX_ CV *cv)
2473{
2474 dXSARGS;
2475 AV *state = (AV *)GENSUB_ARG;
2476 SV *coro = av_pop (state);
2477 SV *data_sv = newSV (sizeof (struct io_state));
2478
2479 av_extend (state, items - 1);
2480
2481 sv_upgrade (data_sv, SVt_PV);
2482 SvCUR_set (data_sv, sizeof (struct io_state));
2483 SvPOK_only (data_sv);
2484
2485 {
2486 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2487
2488 data->errorno = errno;
2489 data->laststype = PL_laststype;
2490 data->laststatval = PL_laststatval;
2491 data->statcache = PL_statcache;
2492 }
2493
2494 /* now build the result vector out of all the parameters and the data_sv */
2495 {
2496 int i;
2497
2498 for (i = 0; i < items; ++i)
2499 av_push (state, SvREFCNT_inc_NN (ST (i)));
2500 }
2501
2502 av_push (state, data_sv);
2503
2504 api_ready (aTHX_ coro);
2505 SvREFCNT_dec (coro);
2506 SvREFCNT_dec ((AV *)state);
2507}
2508
2509static int
2510slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2511{
2512 AV *state = (AV *)frame->data;
2513
2514 /* if we are about to throw, return early */
2515 /* this does not cancel the aio request, but at least */
2516 /* it quickly returns */
2517 if (CORO_THROW)
2518 return 0;
2519
2520 /* one element that is an RV? repeat! */
2521 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2522 return 1;
2523
2524 /* restore status */
2525 {
2526 SV *data_sv = av_pop (state);
2527 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2528
2529 errno = data->errorno;
2530 PL_laststype = data->laststype;
2531 PL_laststatval = data->laststatval;
2532 PL_statcache = data->statcache;
2533
2534 SvREFCNT_dec (data_sv);
2535 }
2536
2537 /* push result values */
2538 {
2539 dSP;
2540 int i;
2541
2542 EXTEND (SP, AvFILLp (state) + 1);
2543 for (i = 0; i <= AvFILLp (state); ++i)
2544 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2545
2546 PUTBACK;
2547 }
767 2548
768 return 0; 2549 return 0;
769} 2550}
770 2551
771static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
772
773static struct coro *
774SvSTATE (SV *coro)
775{
776 HV *stash;
777 MAGIC *mg;
778
779 if (SvROK (coro))
780 coro = SvRV (coro);
781
782 stash = SvSTASH (coro);
783 if (stash != coro_stash && stash != coro_state_stash)
784 {
785 /* very slow, but rare, check */
786 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
787 croak ("Coro::State object required");
788 }
789
790 mg = SvMAGIC (coro);
791 assert (mg->mg_type == PERL_MAGIC_ext);
792 return (struct coro *)mg->mg_ptr;
793}
794
795static void 2552static void
796api_transfer (pTHX_ SV *prev, SV *next, int flags) 2553slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
797{ 2554{
798 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2555 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
799} 2556 SV *coro_hv = SvRV (coro_current);
2557 struct coro *coro = SvSTATE_hv (coro_hv);
800 2558
801/** Coro ********************************************************************/ 2559 /* put our coroutine id on the state arg */
2560 av_push (state, SvREFCNT_inc_NN (coro_hv));
802 2561
803#define PRIO_MAX 3 2562 /* first see whether we have a non-zero priority and set it as AIO prio */
804#define PRIO_HIGH 1 2563 if (coro->prio)
805#define PRIO_NORMAL 0
806#define PRIO_LOW -1
807#define PRIO_IDLE -3
808#define PRIO_MIN -4
809
810/* for Coro.pm */
811static GV *coro_current, *coro_idle;
812static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
813static int coro_nready;
814
815static void
816coro_enq (pTHX_ SV *sv)
817{
818 int prio;
819
820 if (SvTYPE (sv) != SVt_PVHV)
821 croak ("Coro::ready tried to enqueue something that is not a coroutine");
822
823 prio = SvSTATE (sv)->prio;
824
825 av_push (coro_ready [prio - PRIO_MIN], sv);
826 coro_nready++;
827}
828
829static SV *
830coro_deq (pTHX_ int min_prio)
831{
832 int prio = PRIO_MAX - PRIO_MIN;
833
834 min_prio -= PRIO_MIN;
835 if (min_prio < 0)
836 min_prio = 0;
837
838 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839 if (AvFILLp (coro_ready [prio]) >= 0)
840 { 2564 {
841 coro_nready--;
842 return av_shift (coro_ready [prio]);
843 }
844
845 return 0;
846}
847
848static void
849api_ready (SV *coro)
850{
851 dTHX;
852
853 if (SvROK (coro))
854 coro = SvRV (coro);
855
856 LOCK;
857 coro_enq (aTHX_ SvREFCNT_inc (coro));
858 UNLOCK;
859}
860
861static void
862api_schedule (void)
863{
864 dTHX;
865
866 SV *prev, *next;
867 SV *current = GvSV (coro_current);
868
869 for (;;)
870 {
871 LOCK;
872
873 next = coro_deq (aTHX_ PRIO_MIN);
874
875 if (next)
876 break;
877
878 UNLOCK;
879
880 {
881 dSP; 2565 dSP;
882 2566
883 ENTER; 2567 static SV *prio_cv;
884 SAVETMPS; 2568 static SV *prio_sv;
885 2569
2570 if (expect_false (!prio_cv))
2571 {
2572 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2573 prio_sv = newSViv (0);
2574 }
2575
886 PUSHMARK (SP); 2576 PUSHMARK (SP);
2577 sv_setiv (prio_sv, coro->prio);
2578 XPUSHs (prio_sv);
2579
887 PUTBACK; 2580 PUTBACK;
888 call_sv (GvSV (coro_idle), G_DISCARD); 2581 call_sv (prio_cv, G_VOID | G_DISCARD);
889
890 FREETMPS;
891 LEAVE;
892 } 2582 }
893 }
894 2583
895 prev = SvRV (current); 2584 /* now call the original request */
896 SvRV (current) = next;
897
898 /* free this only after the transfer */
899 coro_mortal = prev;
900
901 UNLOCK;
902
903 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
904}
905
906static int coro_cede_self;
907
908static void
909api_cede (void)
910{
911 dTHX;
912 SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));
913
914 LOCK;
915
916 if (coro_cede_self)
917 { 2585 {
918 AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN]; 2586 dSP;
919 av_unshift (runqueue, 1); 2587 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
920 av_store (runqueue, 0, current); 2588 int i;
921 coro_nready++; 2589
922 coro_cede_self = 0; 2590 PUSHMARK (SP);
2591
2592 /* first push all args to the stack */
2593 EXTEND (SP, items + 1);
2594
2595 for (i = 0; i < items; ++i)
2596 PUSHs (arg [i]);
2597
2598 /* now push the callback closure */
2599 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2600
2601 /* now call the AIO function - we assume our request is uncancelable */
2602 PUTBACK;
2603 call_sv ((SV *)req, G_VOID | G_DISCARD);
923 } 2604 }
924 else
925 coro_enq (aTHX_ current);
926 2605
927 UNLOCK; 2606 /* now that the requets is going, we loop toll we have a result */
928 2607 frame->data = (void *)state;
929 api_schedule (); 2608 frame->prepare = prepare_schedule;
2609 frame->check = slf_check_aio_req;
930} 2610}
931 2611
2612static void
2613coro_aio_req_xs (pTHX_ CV *cv)
2614{
2615 dXSARGS;
2616
2617 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2618
2619 XSRETURN_EMPTY;
2620}
2621
2622/*****************************************************************************/
2623
932MODULE = Coro::State PACKAGE = Coro::State 2624MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
933 2625
934PROTOTYPES: DISABLE 2626PROTOTYPES: DISABLE
935 2627
936BOOT: 2628BOOT:
937{ 2629{
938#ifdef USE_ITHREADS 2630#ifdef USE_ITHREADS
939 MUTEX_INIT (&coro_mutex); 2631# if CORO_PTHREAD
2632 coro_thx = PERL_GET_CONTEXT;
2633# endif
940#endif 2634#endif
941 BOOT_PAGESIZE; 2635 BOOT_PAGESIZE;
942 2636
2637 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2638 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2639
2640 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2641 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2642 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2643
2644 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2645 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2646 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2647
943 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2648 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
944 2649
945 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2650 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
946 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2651 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
947 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2652 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2653 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
948 2654
949 main_mainstack = PL_mainstack; 2655 main_mainstack = PL_mainstack;
2656 main_top_env = PL_top_env;
950 2657
2658 while (main_top_env->je_prev)
2659 main_top_env = main_top_env->je_prev;
2660
2661 {
2662 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2663
2664 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2665 hv_store_ent (PL_custom_op_names, slf,
2666 newSVpv ("coro_slf", 0), 0);
2667
2668 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2669 hv_store_ent (PL_custom_op_descs, slf,
2670 newSVpv ("coro schedule like function", 0), 0);
2671 }
2672
951 coroapi.ver = CORO_API_VERSION; 2673 coroapi.ver = CORO_API_VERSION;
2674 coroapi.rev = CORO_API_REVISION;
2675
952 coroapi.transfer = api_transfer; 2676 coroapi.transfer = api_transfer;
953 2677
954 Newz (0, main_stack, 1, coro_stack); 2678 coroapi.sv_state = SvSTATE_;
955 main_stack->idle_sp = (void *)-1; 2679 coroapi.execute_slf = api_execute_slf;
2680 coroapi.prepare_nop = prepare_nop;
2681 coroapi.prepare_schedule = prepare_schedule;
2682 coroapi.prepare_cede = prepare_cede;
2683 coroapi.prepare_cede_notself = prepare_cede_notself;
2684
2685 {
2686 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2687
2688 if (!svp) croak ("Time::HiRes is required");
2689 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2690
2691 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2692 }
956 2693
957 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2694 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
958} 2695}
959 2696
960SV * 2697SV *
961new (char *klass, ...) 2698new (char *klass, ...)
2699 ALIAS:
2700 Coro::new = 1
962 CODE: 2701 CODE:
963{ 2702{
964 struct coro *coro; 2703 struct coro *coro;
2704 MAGIC *mg;
965 HV *hv; 2705 HV *hv;
2706 CV *cb;
966 int i; 2707 int i;
967 2708
2709 if (items > 1)
2710 {
2711 cb = coro_sv_2cv (aTHX_ ST (1));
2712
2713 if (!ix)
2714 {
2715 if (CvISXSUB (cb))
2716 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2717
2718 if (!CvROOT (cb))
2719 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2720 }
2721 }
2722
968 Newz (0, coro, 1, struct coro); 2723 Newz (0, coro, 1, struct coro);
969 coro->args = newAV (); 2724 coro->args = newAV ();
2725 coro->flags = CF_NEW;
970 2726
2727 if (coro_first) coro_first->prev = coro;
2728 coro->next = coro_first;
2729 coro_first = coro;
2730
971 hv = newHV (); 2731 coro->hv = hv = newHV ();
972 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2732 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2733 mg->mg_flags |= MGf_DUP;
973 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2734 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
974 2735
975 av_push (coro->args, newSVsv (RETVAL)); 2736 if (items > 1)
2737 {
2738 av_extend (coro->args, items - 1 + ix - 1);
2739
2740 if (ix)
2741 {
2742 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2743 cb = cv_coro_run;
2744 }
2745
2746 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2747
976 for (i = 1; i < items; i++) 2748 for (i = 2; i < items; i++)
977 av_push (coro->args, newSVsv (ST (i))); 2749 av_push (coro->args, newSVsv (ST (i)));
978 2750 }
979 coro->stack = main_stack;
980 /*coro->mainstack = 0; *//*actual work is done inside transfer */
981 /*coro->stack = 0;*/
982} 2751}
983 OUTPUT: 2752 OUTPUT:
984 RETVAL 2753 RETVAL
985 2754
986void 2755void
987transfer (prev, next, flags) 2756transfer (...)
988 SV *prev 2757 PROTOTYPE: $$
989 SV *next 2758 CODE:
990 int flags 2759 CORO_EXECUTE_SLF_XS (slf_init_transfer);
991 CODE:
992 PUTBACK;
993 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
994 SPAGAIN;
995 2760
996int 2761bool
997prio (Coro::State coro, int newprio = 0) 2762_destroy (SV *coro_sv)
998 ALIAS: 2763 CODE:
999 nice = 1 2764 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1000 CODE: 2765 OUTPUT:
1001{ 2766 RETVAL
1002 RETVAL = coro->prio;
1003
1004 if (items > 1)
1005 {
1006 if (ix)
1007 newprio += coro->prio;
1008
1009 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1010 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1011
1012 coro->prio = newprio;
1013 }
1014}
1015 2767
1016void 2768void
1017_clear_idle_sp (Coro::State self)
1018 CODE:
1019 self->stack->idle_sp = 0;
1020
1021void
1022_clone_state_from (SV *dst, SV *src)
1023 CODE:
1024{
1025 struct coro *coro_src = SvSTATE (src);
1026
1027 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1028
1029 ++coro_src->refcnt;
1030 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1031}
1032
1033void
1034_exit (code) 2769_exit (int code)
1035 int code
1036 PROTOTYPE: $ 2770 PROTOTYPE: $
1037 CODE: 2771 CODE:
1038 _exit (code); 2772 _exit (code);
1039 2773
1040MODULE = Coro::State PACKAGE = Coro::Cont 2774int
2775cctx_stacksize (int new_stacksize = 0)
2776 PROTOTYPE: ;$
2777 CODE:
2778 RETVAL = cctx_stacksize;
2779 if (new_stacksize)
2780 {
2781 cctx_stacksize = new_stacksize;
2782 ++cctx_gen;
2783 }
2784 OUTPUT:
2785 RETVAL
2786
2787int
2788cctx_max_idle (int max_idle = 0)
2789 PROTOTYPE: ;$
2790 CODE:
2791 RETVAL = cctx_max_idle;
2792 if (max_idle > 1)
2793 cctx_max_idle = max_idle;
2794 OUTPUT:
2795 RETVAL
2796
2797int
2798cctx_count ()
2799 PROTOTYPE:
2800 CODE:
2801 RETVAL = cctx_count;
2802 OUTPUT:
2803 RETVAL
2804
2805int
2806cctx_idle ()
2807 PROTOTYPE:
2808 CODE:
2809 RETVAL = cctx_idle;
2810 OUTPUT:
2811 RETVAL
1041 2812
1042void 2813void
1043yield (...) 2814list ()
1044 PROTOTYPE: @ 2815 PROTOTYPE:
2816 PPCODE:
2817{
2818 struct coro *coro;
2819 for (coro = coro_first; coro; coro = coro->next)
2820 if (coro->hv)
2821 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2822}
2823
2824void
2825call (Coro::State coro, SV *coderef)
2826 ALIAS:
2827 eval = 1
2828 CODE:
2829{
2830 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2831 {
2832 struct coro temp;
2833
2834 if (!(coro->flags & CF_RUNNING))
2835 {
2836 PUTBACK;
2837 save_perl (aTHX_ &temp);
2838 load_perl (aTHX_ coro);
2839 }
2840
2841 {
2842 dSP;
2843 ENTER;
2844 SAVETMPS;
2845 PUTBACK;
2846 PUSHSTACK;
2847 PUSHMARK (SP);
2848
2849 if (ix)
2850 eval_sv (coderef, 0);
2851 else
2852 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2853
2854 POPSTACK;
2855 SPAGAIN;
2856 FREETMPS;
2857 LEAVE;
2858 PUTBACK;
2859 }
2860
2861 if (!(coro->flags & CF_RUNNING))
2862 {
2863 save_perl (aTHX_ coro);
2864 load_perl (aTHX_ &temp);
2865 SPAGAIN;
2866 }
2867 }
2868}
2869
2870SV *
2871is_ready (Coro::State coro)
2872 PROTOTYPE: $
2873 ALIAS:
2874 is_ready = CF_READY
2875 is_running = CF_RUNNING
2876 is_new = CF_NEW
2877 is_destroyed = CF_DESTROYED
2878 CODE:
2879 RETVAL = boolSV (coro->flags & ix);
2880 OUTPUT:
2881 RETVAL
2882
2883void
2884throw (Coro::State self, SV *throw = &PL_sv_undef)
2885 PROTOTYPE: $;$
1045 CODE: 2886 CODE:
1046{ 2887{
1047 SV *yieldstack; 2888 struct coro *current = SvSTATE_current;
1048 SV *sv; 2889 SV **throwp = self == current ? &CORO_THROW : &self->except;
1049 AV *defav = GvAV (PL_defgv); 2890 SvREFCNT_dec (*throwp);
1050 struct coro *prev, *next; 2891 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2892}
1051 2893
1052 yieldstack = *hv_fetch ( 2894void
1053 (HV *)SvRV (GvSV (coro_current)), 2895api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1054 "yieldstack", sizeof ("yieldstack") - 1, 2896 PROTOTYPE: $;$
2897 C_ARGS: aTHX_ coro, flags
2898
2899SV *
2900has_cctx (Coro::State coro)
2901 PROTOTYPE: $
2902 CODE:
2903 RETVAL = boolSV (!!coro->cctx);
2904 OUTPUT:
2905 RETVAL
2906
2907int
2908is_traced (Coro::State coro)
2909 PROTOTYPE: $
2910 CODE:
2911 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2912 OUTPUT:
2913 RETVAL
2914
2915UV
2916rss (Coro::State coro)
2917 PROTOTYPE: $
2918 ALIAS:
2919 usecount = 1
2920 CODE:
2921 switch (ix)
2922 {
2923 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2924 case 1: RETVAL = coro->usecount; break;
1055 0 2925 }
2926 OUTPUT:
2927 RETVAL
2928
2929void
2930force_cctx ()
2931 PROTOTYPE:
2932 CODE:
2933 SvSTATE_current->cctx->idle_sp = 0;
2934
2935void
2936swap_defsv (Coro::State self)
2937 PROTOTYPE: $
2938 ALIAS:
2939 swap_defav = 1
2940 CODE:
2941 if (!self->slot)
2942 croak ("cannot swap state with coroutine that has no saved state,");
2943 else
1056 ); 2944 {
2945 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2946 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1057 2947
1058 /* set up @_ -- ugly */ 2948 SV *tmp = *src; *src = *dst; *dst = tmp;
1059 av_clear (defav); 2949 }
1060 av_fill (defav, items - 1);
1061 while (items--)
1062 av_store (defav, items, SvREFCNT_inc (ST(items)));
1063 2950
1064 sv = av_pop ((AV *)SvRV (yieldstack));
1065 prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1066 next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1067 SvREFCNT_dec (sv);
1068
1069 coro_state_transfer (aTHX_ prev, next, 0);
1070}
1071 2951
1072MODULE = Coro::State PACKAGE = Coro 2952MODULE = Coro::State PACKAGE = Coro
1073 2953
1074BOOT: 2954BOOT:
1075{ 2955{
1076 int i; 2956 int i;
1077 2957
2958 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2959 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2960 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2961 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
2962 cv_coro_terminate = get_cv ( "Coro::terminate", GV_ADD);
2963 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE);
2964 SvREADONLY_on (coro_current);
2965
2966 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
2967 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
2968 cv_pool_handler = get_cv ("Coro::_pool_handler", 0); SvREADONLY_on (cv_pool_handler);
2969 cv_coro_new = get_cv ("Coro::new", 0); SvREADONLY_on (cv_coro_new);
2970
1078 coro_stash = gv_stashpv ("Coro", TRUE); 2971 coro_stash = gv_stashpv ("Coro", TRUE);
1079 2972
1080 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2973 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1081 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2974 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1082 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2975 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1083 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2976 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1084 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2977 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1085 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2978 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1086 2979
1087 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1088 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1089
1090 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2980 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1091 coro_ready[i] = newAV (); 2981 coro_ready[i] = newAV ();
1092 2982
1093 { 2983 {
1094 SV *sv = perl_get_sv("Coro::API", 1); 2984 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1095 2985
1096 coroapi.schedule = api_schedule; 2986 coroapi.schedule = api_schedule;
1097 coroapi.cede = api_cede; 2987 coroapi.cede = api_cede;
2988 coroapi.cede_notself = api_cede_notself;
1098 coroapi.ready = api_ready; 2989 coroapi.ready = api_ready;
2990 coroapi.is_ready = api_is_ready;
1099 coroapi.nready = &coro_nready; 2991 coroapi.nready = coro_nready;
1100 coroapi.current = coro_current; 2992 coroapi.current = coro_current;
1101 2993
1102 GCoroAPI = &coroapi; 2994 /*GCoroAPI = &coroapi;*/
1103 sv_setiv (sv, (IV)&coroapi); 2995 sv_setiv (sv, (IV)&coroapi);
1104 SvREADONLY_on (sv); 2996 SvREADONLY_on (sv);
1105 } 2997 }
1106} 2998}
1107 2999
1108void 3000void
3001schedule (...)
3002 CODE:
3003 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3004
3005void
3006cede (...)
3007 CODE:
3008 CORO_EXECUTE_SLF_XS (slf_init_cede);
3009
3010void
3011cede_notself (...)
3012 CODE:
3013 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3014
3015void
3016_set_current (SV *current)
3017 PROTOTYPE: $
3018 CODE:
3019 SvREFCNT_dec (SvRV (coro_current));
3020 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3021
3022void
3023_set_readyhook (SV *hook)
3024 PROTOTYPE: $
3025 CODE:
3026 SvREFCNT_dec (coro_readyhook);
3027 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3028
3029int
3030prio (Coro::State coro, int newprio = 0)
3031 PROTOTYPE: $;$
3032 ALIAS:
3033 nice = 1
3034 CODE:
3035{
3036 RETVAL = coro->prio;
3037
3038 if (items > 1)
3039 {
3040 if (ix)
3041 newprio = coro->prio - newprio;
3042
3043 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
3044 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
3045
3046 coro->prio = newprio;
3047 }
3048}
3049 OUTPUT:
3050 RETVAL
3051
3052SV *
1109ready (SV *self) 3053ready (SV *self)
1110 PROTOTYPE: $ 3054 PROTOTYPE: $
1111 CODE: 3055 CODE:
1112 api_ready (self); 3056 RETVAL = boolSV (api_ready (aTHX_ self));
3057 OUTPUT:
3058 RETVAL
1113 3059
1114int 3060int
1115nready (...) 3061nready (...)
1116 PROTOTYPE: 3062 PROTOTYPE:
1117 CODE: 3063 CODE:
1118 RETVAL = coro_nready; 3064 RETVAL = coro_nready;
1119 OUTPUT: 3065 OUTPUT:
1120 RETVAL 3066 RETVAL
1121 3067
1122void 3068void
1123schedule (...) 3069_pool_handler (...)
1124 PROTOTYPE:
1125 CODE: 3070 CODE:
1126 api_schedule (); 3071 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
1127 3072
1128void 3073void
1129_set_cede_self () 3074async_pool (SV *cv, ...)
3075 PROTOTYPE: &@
3076 PPCODE:
3077{
3078 HV *hv = (HV *)av_pop (av_async_pool);
3079 AV *av = newAV ();
3080 SV *cb = ST (0);
3081 int i;
3082
3083 av_extend (av, items - 2);
3084 for (i = 1; i < items; ++i)
3085 av_push (av, SvREFCNT_inc_NN (ST (i)));
3086
3087 if ((SV *)hv == &PL_sv_undef)
3088 {
3089 PUSHMARK (SP);
3090 EXTEND (SP, 2);
3091 PUSHs (sv_Coro);
3092 PUSHs ((SV *)cv_pool_handler);
3093 PUTBACK;
3094 call_sv ((SV *)cv_coro_new, G_SCALAR);
3095 SPAGAIN;
3096
3097 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3098 }
3099
3100 {
3101 struct coro *coro = SvSTATE_hv (hv);
3102
3103 assert (!coro->invoke_cb);
3104 assert (!coro->invoke_av);
3105 coro->invoke_cb = SvREFCNT_inc (cb);
3106 coro->invoke_av = av;
3107 }
3108
3109 api_ready (aTHX_ (SV *)hv);
3110
3111 if (GIMME_V != G_VOID)
3112 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3113 else
3114 SvREFCNT_dec (hv);
3115}
3116
3117SV *
3118rouse_cb ()
3119 PROTOTYPE:
1130 CODE: 3120 CODE:
1131 coro_cede_self = 1; 3121 RETVAL = coro_new_rouse_cb (aTHX);
1132
1133void
1134cede (...)
1135 PROTOTYPE:
1136 CODE:
1137 api_cede ();
1138
1139MODULE = Coro::State PACKAGE = Coro::AIO
1140
1141SV *
1142_get_state ()
1143 CODE:
1144{
1145 struct {
1146 int errorno;
1147 int laststype;
1148 int laststatval;
1149 Stat_t statcache;
1150 } data;
1151
1152 data.errorno = errno;
1153 data.laststype = PL_laststype;
1154 data.laststatval = PL_laststatval;
1155 data.statcache = PL_statcache;
1156
1157 RETVAL = newSVpvn ((char *)&data, sizeof data);
1158}
1159 OUTPUT: 3122 OUTPUT:
1160 RETVAL 3123 RETVAL
1161 3124
1162void 3125void
1163_set_state (char *data_) 3126rouse_wait (...)
1164 PROTOTYPE: $ 3127 PROTOTYPE: ;$
3128 PPCODE:
3129 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3130
3131
3132MODULE = Coro::State PACKAGE = PerlIO::cede
3133
3134BOOT:
3135 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3136
3137
3138MODULE = Coro::State PACKAGE = Coro::Semaphore
3139
3140SV *
3141new (SV *klass, SV *count = 0)
1165 CODE: 3142 CODE:
3143 RETVAL = sv_bless (
3144 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3145 GvSTASH (CvGV (cv))
3146 );
3147 OUTPUT:
3148 RETVAL
3149
3150# helper for Coro::Channel
3151SV *
3152_alloc (int count)
3153 CODE:
3154 RETVAL = coro_waitarray_new (aTHX_ count);
3155 OUTPUT:
3156 RETVAL
3157
3158SV *
3159count (SV *self)
3160 CODE:
3161 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3162 OUTPUT:
3163 RETVAL
3164
3165void
3166up (SV *self, int adjust = 1)
3167 ALIAS:
3168 adjust = 1
3169 CODE:
3170 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3171
3172void
3173down (...)
3174 CODE:
3175 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3176
3177void
3178wait (...)
3179 CODE:
3180 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3181
3182void
3183try (SV *self)
3184 PPCODE:
1166{ 3185{
1167 struct { 3186 AV *av = (AV *)SvRV (self);
3187 SV *count_sv = AvARRAY (av)[0];
3188 IV count = SvIVX (count_sv);
3189
3190 if (count > 0)
3191 {
3192 --count;
3193 SvIVX (count_sv) = count;
3194 XSRETURN_YES;
3195 }
3196 else
3197 XSRETURN_NO;
3198}
3199
3200void
3201waiters (SV *self)
3202 PPCODE:
3203{
3204 AV *av = (AV *)SvRV (self);
3205 int wcount = AvFILLp (av) + 1 - 1;
3206
3207 if (GIMME_V == G_SCALAR)
3208 XPUSHs (sv_2mortal (newSViv (wcount)));
3209 else
3210 {
1168 int errorno; 3211 int i;
1169 int laststype; 3212 EXTEND (SP, wcount);
1170 int laststatval; 3213 for (i = 1; i <= wcount; ++i)
1171 Stat_t statcache; 3214 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1172 } *data = (void *)data_; 3215 }
1173
1174 errno = data->errorno;
1175 PL_laststype = data->laststype;
1176 PL_laststatval = data->laststatval;
1177 PL_statcache = data->statcache;
1178} 3216}
3217
3218MODULE = Coro::State PACKAGE = Coro::Signal
3219
3220SV *
3221new (SV *klass)
3222 CODE:
3223 RETVAL = sv_bless (
3224 coro_waitarray_new (aTHX_ 0),
3225 GvSTASH (CvGV (cv))
3226 );
3227 OUTPUT:
3228 RETVAL
3229
3230void
3231wait (...)
3232 CODE:
3233 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3234
3235void
3236broadcast (SV *self)
3237 CODE:
3238{
3239 AV *av = (AV *)SvRV (self);
3240 coro_signal_wake (aTHX_ av, AvFILLp (av));
3241}
3242
3243void
3244send (SV *self)
3245 CODE:
3246{
3247 AV *av = (AV *)SvRV (self);
3248
3249 if (AvFILLp (av))
3250 coro_signal_wake (aTHX_ av, 1);
3251 else
3252 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3253}
3254
3255IV
3256awaited (SV *self)
3257 CODE:
3258 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3259 OUTPUT:
3260 RETVAL
3261
3262
3263MODULE = Coro::State PACKAGE = Coro::AnyEvent
3264
3265BOOT:
3266 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3267
3268void
3269_schedule (...)
3270 CODE:
3271{
3272 static int incede;
3273
3274 api_cede_notself (aTHX);
3275
3276 ++incede;
3277 while (coro_nready >= incede && api_cede (aTHX))
3278 ;
3279
3280 sv_setsv (sv_activity, &PL_sv_undef);
3281 if (coro_nready >= incede)
3282 {
3283 PUSHMARK (SP);
3284 PUTBACK;
3285 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3286 }
3287
3288 --incede;
3289}
3290
3291
3292MODULE = Coro::State PACKAGE = Coro::AIO
3293
3294void
3295_register (char *target, char *proto, SV *req)
3296 CODE:
3297{
3298 CV *req_cv = coro_sv_2cv (aTHX_ req);
3299 /* newXSproto doesn't return the CV on 5.8 */
3300 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3301 sv_setpv ((SV *)slf_cv, proto);
3302 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3303}
3304

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