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Comparing Coro/Coro/State.xs (file contents):
Revision 1.96 by root, Sun Nov 26 18:25:11 2006 UTC vs.
Revision 1.297 by root, Tue Nov 18 11:04:42 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, don't ask
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) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <stdio.h> 83/* 5.11 */
33#include <errno.h> 84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
34 108
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD 110# undef CORO_STACKGUARD
37#endif 111#endif
38 112
39#ifndef STACKGUARD 113#ifndef CORO_STACKGUARD
40# define STACKGUARD 0 114# define CORO_STACKGUARD 0
41#endif
42
43#ifdef HAVE_MMAP
44# include <unistd.h>
45# include <sys/mman.h>
46# ifndef MAP_ANONYMOUS
47# ifdef MAP_ANON
48# define MAP_ANONYMOUS MAP_ANON
49# else
50# undef HAVE_MMAP
51# endif 115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
128# define dSTACKLEVEL volatile void *stacklevel
129# define STACKLEVEL ((void *)&stacklevel)
130#endif
131
132#define IN_DESTRUCT (PL_main_cv == Nullcv)
133
134#if __GNUC__ >= 3
135# define attribute(x) __attribute__(x)
136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
138#else
139# define attribute(x)
140# define expect(expr,value) (expr)
141# define INLINE static
142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
146
147#define NOINLINE attribute ((noinline))
148
149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
151
152#ifdef USE_ITHREADS
153# if CORO_PTHREAD
154static void *coro_thx;
52# endif 155# endif
53# include <limits.h>
54# ifndef PAGESIZE
55# define PAGESIZE pagesize
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57static long pagesize;
58# else
59# define BOOT_PAGESIZE
60# endif 156#endif
61#endif
62 157
63/* The next macro should declare a variable stacklevel that contains and approximation 158static double (*nvtime)(); /* so why doesn't it take void? */
64 * to the current C stack pointer. Its property is that it changes with each call
65 * and should be unique. */
66#define dSTACKLEVEL int stacklevel
67#define STACKLEVEL ((void *)&stacklevel)
68 159
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
70 163
71#include "CoroAPI.h" 164static U32 cctx_gen;
72 165static size_t cctx_stacksize = CORO_STACKSIZE;
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74
75#ifdef USE_ITHREADS
76static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else
80# define LOCK (void)0
81# define UNLOCK (void)0
82#endif
83
84static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
186static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle;
188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
88 197
89/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 199typedef struct coro_cctx
200{
91 struct coro_stack *next; 201 struct coro_cctx *next;
92 202
93 /* the stack */ 203 /* the stack */
94 void *sptr; 204 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 205 size_t ssize;
96 206
97 /* cpu state */ 207 /* cpu state */
98 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 208 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
209 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99 JMPENV *top_env; 210 JMPENV *top_env;
100 coro_context cctx; 211 coro_context cctx;
101} coro_stack; 212
213 U32 gen;
214#if CORO_USE_VALGRIND
215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
219
220enum {
221 CF_RUNNING = 0x0001, /* coroutine is running */
222 CF_READY = 0x0002, /* coroutine is ready */
223 CF_NEW = 0x0004, /* has never been switched to */
224 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
225};
226
227/* the structure where most of the perl state is stored, overlaid on the cxstack */
228typedef struct
229{
230 SV *defsv;
231 AV *defav;
232 SV *errsv;
233 SV *irsgv;
234#define VAR(name,type) type name;
235# include "state.h"
236#undef VAR
237} perl_slots;
238
239#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
102 240
103/* this is a structure representing a perl-level coroutine */ 241/* this is a structure representing a perl-level coroutine */
104struct coro { 242struct coro {
105 /* the c coroutine allocated to this perl coroutine, if any */ 243 /* the C coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 244 coro_cctx *cctx;
107 245
108 /* data associated with this coroutine (initial args) */ 246 /* state data */
109 AV *args; 247 struct CoroSLF slf_frame; /* saved slf frame */
110 int refcnt;
111
112 /* optionally saved, might be zero */
113 AV *defav;
114 SV *defsv;
115 SV *errsv;
116
117 /* saved global state not related to stacks */
118 U8 dowarn;
119 I32 in_eval;
120
121 /* the stacks and related info (callchain etc..) */
122 PERL_SI *curstackinfo;
123 AV *curstack;
124 AV *mainstack; 248 AV *mainstack;
125 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
126 OP *op; 250
127 SV **curpad; 251 AV *args; /* data associated with this coroutine (initial args) */
128 AV *comppad; 252 int refcnt; /* coroutines are refcounted, yes */
129 CV *compcv; 253 int flags; /* CF_ flags */
130 SV **stack_base; 254 HV *hv; /* the perl hash associated with this coro, if any */
131 SV **stack_max; 255 void (*on_destroy)(pTHX_ struct coro *coro);
132 SV **tmps_stack; 256
133 I32 tmps_floor; 257 /* statistics */
134 I32 tmps_ix; 258 int usecount; /* number of transfers to this coro */
135 I32 tmps_max;
136 I32 *markstack;
137 I32 *markstack_ptr;
138 I32 *markstack_max;
139 I32 *scopestack;
140 I32 scopestack_ix;
141 I32 scopestack_max;
142 ANY *savestack;
143 I32 savestack_ix;
144 I32 savestack_max;
145 OP **retstack;
146 I32 retstack_ix;
147 I32 retstack_max;
148 PMOP *curpm;
149 COP *curcop;
150 259
151 /* coro process data */ 260 /* coro process data */
152 int prio; 261 int prio;
262 SV *except; /* exception to be thrown */
263
264 /* async_pool */
265 SV *saved_deffh;
266
267 /* linked list */
268 struct coro *next, *prev;
153}; 269};
154 270
155typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
157 273
274/* the following variables are effectively part of the perl context */
275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
278
279/** Coro ********************************************************************/
280
281#define PRIO_MAX 3
282#define PRIO_HIGH 1
283#define PRIO_NORMAL 0
284#define PRIO_LOW -1
285#define PRIO_IDLE -3
286#define PRIO_MIN -4
287
288/* for Coro.pm */
289static SV *coro_current;
290static SV *coro_readyhook;
291static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
292static struct coro *coro_first;
293#define coro_nready coroapi.nready
294
295/** lowlevel stuff **********************************************************/
296
297static SV *
298coro_get_sv (pTHX_ const char *name, int create)
299{
300#if PERL_VERSION_ATLEAST (5,10,0)
301 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
302 get_sv (name, create);
303#endif
304 return get_sv (name, create);
305}
306
307static AV *
308coro_get_av (pTHX_ const char *name, int create)
309{
310#if PERL_VERSION_ATLEAST (5,10,0)
311 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
312 get_av (name, create);
313#endif
314 return get_av (name, create);
315}
316
317static HV *
318coro_get_hv (pTHX_ const char *name, int create)
319{
320#if PERL_VERSION_ATLEAST (5,10,0)
321 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
322 get_hv (name, create);
323#endif
324 return get_hv (name, create);
325}
326
158static AV * 327static AV *
159coro_clone_padlist (pTHX_ CV *cv) 328coro_clone_padlist (pTHX_ CV *cv)
160{ 329{
161 AV *padlist = CvPADLIST (cv); 330 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 331 AV *newpadlist, *newpad;
163 332
164 newpadlist = newAV (); 333 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 334 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 335#if PERL_VERSION_ATLEAST (5,10,0)
336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
337#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 338 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 339#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 340 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 341 --AvFILLp (padlist);
173 342
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 343 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad); 344 av_store (newpadlist, 1, (SV *)newpad);
176 345
177 return newpadlist; 346 return newpadlist;
178} 347}
179 348
… …
209 378
210 /* casting is fun. */ 379 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 380 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 381 free_padlist (aTHX_ padlist);
213 382
214 SvREFCNT_dec (av); 383 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 384
216 return 0; 385 return 0;
217} 386}
218 387
388#define CORO_MAGIC_type_cv 26
219#define PERL_MAGIC_coro PERL_MAGIC_ext 389#define CORO_MAGIC_type_state PERL_MAGIC_ext
220 390
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 391static MGVTBL coro_cv_vtbl = {
392 0, 0, 0, 0,
393 coro_cv_free
394};
395
396#define CORO_MAGIC_NN(sv, type) \
397 (expect_true (SvMAGIC (sv)->mg_type == type) \
398 ? SvMAGIC (sv) \
399 : mg_find (sv, type))
400
401#define CORO_MAGIC(sv, type) \
402 (expect_true (SvMAGIC (sv)) \
403 ? CORO_MAGIC_NN (sv, type) \
404 : 0)
405
406#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
407#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
408
409INLINE struct coro *
410SvSTATE_ (pTHX_ SV *coro)
411{
412 HV *stash;
413 MAGIC *mg;
414
415 if (SvROK (coro))
416 coro = SvRV (coro);
417
418 if (expect_false (SvTYPE (coro) != SVt_PVHV))
419 croak ("Coro::State object required");
420
421 stash = SvSTASH (coro);
422 if (expect_false (stash != coro_stash && stash != coro_state_stash))
423 {
424 /* very slow, but rare, check */
425 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
426 croak ("Coro::State object required");
427 }
428
429 mg = CORO_MAGIC_state (coro);
430 return (struct coro *)mg->mg_ptr;
431}
432
433#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
434
435/* faster than SvSTATE, but expects a coroutine hv */
436#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
437#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
222 438
223/* the next two functions merely cache the padlists */ 439/* the next two functions merely cache the padlists */
224static void 440static void
225get_padlist (pTHX_ CV *cv) 441get_padlist (pTHX_ CV *cv)
226{ 442{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 443 MAGIC *mg = CORO_MAGIC_cv (cv);
444 AV *av;
228 445
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 448 else
232 { 449 {
233#if 0 450#if CORO_PREFER_PERL_FUNCTIONS
234 /* this is probably cleaner, but also slower? */ 451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 453 CV *cp = Perl_cv_clone (cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 454 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 455 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 456 SvREFCNT_dec (cp);
239#else 457#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 458 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
… …
243} 461}
244 462
245static void 463static void
246put_padlist (pTHX_ CV *cv) 464put_padlist (pTHX_ CV *cv)
247{ 465{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 466 MAGIC *mg = CORO_MAGIC_cv (cv);
467 AV *av;
249 468
250 if (!mg) 469 if (expect_false (!mg))
251 { 470 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 }
257 471
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 472 av = (AV *)mg->mg_obj;
259}
260 473
261#define SB do { 474 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 475 av_extend (av, AvMAX (av) + 1);
263 476
264#define LOAD(state) load_state(aTHX_ (state)); 477 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 478}
266 479
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 480/** load & save, init *******************************************************/
268 481
269static void 482static void
270load_state(pTHX_ Coro__State c) 483load_perl (pTHX_ Coro__State c)
271{ 484{
272 PL_dowarn = c->dowarn; 485 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 486 c->slot = 0;
274 487
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 488 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;
305 489
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 490 GvSV (PL_defgv) = slot->defsv;
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 491 GvAV (PL_defgv) = slot->defav;
308 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 492 GvSV (PL_errgv) = slot->errsv;
493 GvSV (irsgv) = slot->irsgv;
494
495 #define VAR(name,type) PL_ ## name = slot->name;
496 # include "state.h"
497 #undef VAR
309 498
310 { 499 {
311 dSP; 500 dSP;
501
312 CV *cv; 502 CV *cv;
313 503
314 /* now do the ugly restore mess */ 504 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs)) 505 while (expect_true (cv = (CV *)POPs))
316 { 506 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */ 507 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist; 508 CvDEPTH (cv) = PTR2IV (POPs);
323 } 509 CvPADLIST (cv) = (AV *)POPs;
324
325 ++CvDEPTH(cv);
326 } 510 }
327 511
328 PUTBACK; 512 PUTBACK;
329 } 513 }
330}
331 514
515 slf_frame = c->slf_frame;
516 CORO_THROW = c->except;
517}
518
332static void 519static void
333save_state(pTHX_ Coro__State c, int flags) 520save_perl (pTHX_ Coro__State c)
334{ 521{
522 c->except = CORO_THROW;
523 c->slf_frame = slf_frame;
524
335 { 525 {
336 dSP; 526 dSP;
337 I32 cxix = cxstack_ix; 527 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack; 528 PERL_CONTEXT *ccstk = cxstack;
339 PERL_SI *top_si = PL_curstackinfo; 529 PERL_SI *top_si = PL_curstackinfo;
… …
341 /* 531 /*
342 * the worst thing you can imagine happens first - we have to save 532 * the worst thing you can imagine happens first - we have to save
343 * (and reinitialize) all cv's in the whole callchain :( 533 * (and reinitialize) all cv's in the whole callchain :(
344 */ 534 */
345 535
346 PUSHs (Nullsv); 536 XPUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */ 537 /* this loop was inspired by pp_caller */
348 for (;;) 538 for (;;)
349 { 539 {
350 while (cxix >= 0) 540 while (expect_true (cxix >= 0))
351 { 541 {
352 PERL_CONTEXT *cx = &ccstk[cxix--]; 542 PERL_CONTEXT *cx = &ccstk[cxix--];
353 543
354 if (CxTYPE(cx) == CXt_SUB) 544 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
355 { 545 {
356 CV *cv = cx->blk_sub.cv; 546 CV *cv = cx->blk_sub.cv;
547
357 if (CvDEPTH(cv)) 548 if (expect_true (CvDEPTH (cv)))
358 { 549 {
359 EXTEND (SP, CvDEPTH(cv)*2); 550 EXTEND (SP, 3);
360
361 while (--CvDEPTH(cv))
362 {
363 /* this tells the restore code to increment CvDEPTH */
364 PUSHs (Nullsv);
365 PUSHs ((SV *)cv);
366 }
367
368 PUSHs ((SV *)CvPADLIST(cv)); 551 PUSHs ((SV *)CvPADLIST (cv));
552 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
369 PUSHs ((SV *)cv); 553 PUSHs ((SV *)cv);
370 554
555 CvDEPTH (cv) = 0;
371 get_padlist (aTHX_ cv); 556 get_padlist (aTHX_ cv);
372 } 557 }
373 } 558 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE(cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 559 }
383 560
384 if (top_si->si_type == PERLSI_MAIN) 561 if (expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 562 break;
386 563
387 top_si = top_si->si_prev; 564 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 565 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 566 cxix = top_si->si_cxix;
390 } 567 }
391 568
392 PUTBACK; 569 PUTBACK;
393 } 570 }
394 571
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 572 /* allocate some space on the context stack for our purposes */
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 573 /* we manually unroll here, as usually 2 slots is enough */
397 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 574 if (SLOT_COUNT >= 1) CXINC;
575 if (SLOT_COUNT >= 2) CXINC;
576 if (SLOT_COUNT >= 3) CXINC;
577 {
578 int i;
579 for (i = 3; i < SLOT_COUNT; ++i)
580 CXINC;
581 }
582 cxstack_ix -= SLOT_COUNT; /* undo allocation */
398 583
399 c->dowarn = PL_dowarn;
400 c->in_eval = PL_in_eval;
401
402 c->curstackinfo = PL_curstackinfo;
403 c->curstack = PL_curstack;
404 c->mainstack = PL_mainstack; 584 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp; 585
406 c->op = PL_op; 586 {
407 c->curpad = PL_curpad; 587 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408 c->comppad = PL_comppad; 588
409 c->compcv = PL_compcv; 589 slot->defav = GvAV (PL_defgv);
410 c->stack_base = PL_stack_base; 590 slot->defsv = DEFSV;
411 c->stack_max = PL_stack_max; 591 slot->errsv = ERRSV;
412 c->tmps_stack = PL_tmps_stack; 592 slot->irsgv = GvSV (irsgv);
413 c->tmps_floor = PL_tmps_floor; 593
414 c->tmps_ix = PL_tmps_ix; 594 #define VAR(name,type) slot->name = PL_ ## name;
415 c->tmps_max = PL_tmps_max; 595 # include "state.h"
416 c->markstack = PL_markstack; 596 #undef VAR
417 c->markstack_ptr = PL_markstack_ptr; 597 }
418 c->markstack_max = PL_markstack_max;
419 c->scopestack = PL_scopestack;
420 c->scopestack_ix = PL_scopestack_ix;
421 c->scopestack_max = PL_scopestack_max;
422 c->savestack = PL_savestack;
423 c->savestack_ix = PL_savestack_ix;
424 c->savestack_max = PL_savestack_max;
425#if PERL_VERSION < 9
426 c->retstack = PL_retstack;
427 c->retstack_ix = PL_retstack_ix;
428 c->retstack_max = PL_retstack_max;
429#endif
430 c->curpm = PL_curpm;
431 c->curcop = PL_curcop;
432} 598}
433 599
434/* 600/*
435 * allocate various perl stacks. This is an exact copy 601 * allocate various perl stacks. This is almost an exact copy
436 * of perl.c:init_stacks, except that it uses less memory 602 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do 603 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace. 604 * not usually need a lot of stackspace.
439 */ 605 */
606#if CORO_PREFER_PERL_FUNCTIONS
607# define coro_init_stacks init_stacks
608#else
440static void 609static void
441coro_init_stacks (pTHX) 610coro_init_stacks (pTHX)
442{ 611{
443 LOCK; 612 PL_curstackinfo = new_stackinfo(32, 8);
444
445 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446 PL_curstackinfo->si_type = PERLSI_MAIN; 613 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 614 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 615 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 616
450 PL_stack_base = AvARRAY(PL_curstack); 617 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 618 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 619 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 620
454 New(50,PL_tmps_stack,96,SV*); 621 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 622 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 623 PL_tmps_ix = -1;
457 PL_tmps_max = 96; 624 PL_tmps_max = 32;
458 625
459 New(54,PL_markstack,16,I32); 626 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 627 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16; 628 PL_markstack_max = PL_markstack + 16;
462 629
463#ifdef SET_MARK_OFFSET 630#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 631 SET_MARK_OFFSET;
465#endif 632#endif
466 633
467 New(54,PL_scopestack,16,I32); 634 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 635 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16; 636 PL_scopestack_max = 8;
470 637
471 New(54,PL_savestack,96,ANY); 638 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 639 PL_savestack_ix = 0;
473 PL_savestack_max = 96; 640 PL_savestack_max = 24;
474 641
475#if PERL_VERSION < 9 642#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,8,OP*); 643 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 644 PL_retstack_ix = 0;
478 PL_retstack_max = 8; 645 PL_retstack_max = 4;
479#endif 646#endif
480
481 UNLOCK;
482} 647}
648#endif
483 649
484/* 650/*
485 * destroy the stacks, the callchain etc... 651 * destroy the stacks, the callchain etc...
486 */ 652 */
487static void 653static void
488destroy_stacks(pTHX) 654coro_destruct_stacks (pTHX)
489{ 655{
490 if (!IN_DESTRUCT)
491 {
492 /* is this ugly, I ask? */
493 LEAVE_SCOPE (0);
494
495 /* sure it is, but more important: is it correct?? :/ */
496 FREETMPS;
497
498 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499 }
500
501 while (PL_curstackinfo->si_next) 656 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 657 PL_curstackinfo = PL_curstackinfo->si_next;
503 658
504 while (PL_curstackinfo) 659 while (PL_curstackinfo)
505 { 660 {
506 PERL_SI *p = PL_curstackinfo->si_prev; 661 PERL_SI *p = PL_curstackinfo->si_prev;
507 662
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT) 663 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack); 664 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519 665
520 Safefree (PL_curstackinfo->si_cxstack); 666 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo); 667 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p; 668 PL_curstackinfo = p;
523 } 669 }
524 670
525 Safefree (PL_tmps_stack); 671 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 672 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 673 Safefree (PL_scopestack);
528 Safefree (PL_savestack); 674 Safefree (PL_savestack);
529#if PERL_VERSION < 9 675#if !PERL_VERSION_ATLEAST (5,10,0)
530 Safefree (PL_retstack); 676 Safefree (PL_retstack);
531#endif 677#endif
532} 678}
533 679
680static size_t
681coro_rss (pTHX_ struct coro *coro)
682{
683 size_t rss = sizeof (*coro);
684
685 if (coro->mainstack)
686 {
687 perl_slots tmp_slot;
688 perl_slots *slot;
689
690 if (coro->flags & CF_RUNNING)
691 {
692 slot = &tmp_slot;
693
694 #define VAR(name,type) slot->name = PL_ ## name;
695 # include "state.h"
696 #undef VAR
697 }
698 else
699 slot = coro->slot;
700
701 if (slot)
702 {
703 rss += sizeof (slot->curstackinfo);
704 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
705 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
706 rss += slot->tmps_max * sizeof (SV *);
707 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
708 rss += slot->scopestack_max * sizeof (I32);
709 rss += slot->savestack_max * sizeof (ANY);
710
711#if !PERL_VERSION_ATLEAST (5,10,0)
712 rss += slot->retstack_max * sizeof (OP *);
713#endif
714 }
715 }
716
717 return rss;
718}
719
720/** coroutine stack handling ************************************************/
721
722static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
723static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
725
726/* apparently < 5.8.8 */
727#ifndef MgPV_nolen_const
728#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
729 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
730 (const char*)(mg)->mg_ptr)
731#endif
732
733/*
734 * This overrides the default magic get method of %SIG elements.
735 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
736 * and instead of tryign to save and restore the hash elements, we just provide
737 * readback here.
738 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
739 * not expecting this to actually change the hook. This is a potential problem
740 * when a schedule happens then, but we ignore this.
741 */
534static void 742static int
535setup_coro (struct coro *coro) 743coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
744{
745 const char *s = MgPV_nolen_const (mg);
746
747 if (*s == '_')
748 {
749 SV **svp = 0;
750
751 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
752 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
753
754 if (svp)
755 {
756 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
757 return 0;
758 }
759 }
760
761 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
762}
763
764static int
765coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
766{
767 const char *s = MgPV_nolen_const (mg);
768
769 if (*s == '_')
770 {
771 SV **svp = 0;
772
773 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
774 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
775
776 if (svp)
777 {
778 SV *old = *svp;
779 *svp = 0;
780 SvREFCNT_dec (old);
781 return 0;
782 }
783 }
784
785 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
786}
787
788static int
789coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
790{
791 const char *s = MgPV_nolen_const (mg);
792
793 if (*s == '_')
794 {
795 SV **svp = 0;
796
797 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
798 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
799
800 if (svp)
801 {
802 SV *old = *svp;
803 *svp = newSVsv (sv);
804 SvREFCNT_dec (old);
805 return 0;
806 }
807 }
808
809 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
810}
811
812static void
813prepare_nop (pTHX_ struct coro_transfer_args *ta)
814{
815 /* kind of mega-hacky, but works */
816 ta->next = ta->prev = (struct coro *)ta;
817}
818
819static int
820slf_check_nop (pTHX_ struct CoroSLF *frame)
821{
822 return 0;
823}
824
825static UNOP coro_setup_op;
826
827static void NOINLINE /* noinline to keep it out of the transfer fast path */
828coro_setup (pTHX_ struct coro *coro)
536{ 829{
537 /* 830 /*
538 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
539 */ 832 */
540 dTHX;
541 dSP;
542 UNOP myop;
543 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544
545 coro_init_stacks (aTHX); 833 coro_init_stacks (aTHX);
546 /*PL_curcop = 0;*/ 834
547 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 835 PL_runops = RUNOPS_DEFAULT;
836 PL_curcop = &PL_compiling;
837 PL_in_eval = EVAL_NULL;
838 PL_comppad = 0;
839 PL_curpm = 0;
840 PL_curpad = 0;
841 PL_localizing = 0;
842 PL_dirty = 0;
843 PL_restartop = 0;
844#if PERL_VERSION_ATLEAST (5,10,0)
845 PL_parser = 0;
846#endif
847
848 /* recreate the die/warn hooks */
849 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
850 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
851
852 GvSV (PL_defgv) = newSV (0);
853 GvAV (PL_defgv) = coro->args; coro->args = 0;
854 GvSV (PL_errgv) = newSV (0);
855 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
856 PL_rs = newSVsv (GvSV (irsgv));
857 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
858
859 {
860 dSP;
861 UNOP myop;
862
863 Zero (&myop, 1, UNOP);
864 myop.op_next = Nullop;
865 myop.op_flags = OPf_WANT_VOID;
866
867 PUSHMARK (SP);
868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
869 PUTBACK;
870 PL_op = (OP *)&myop;
871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
872 SPAGAIN;
873 }
874
875 /* this newly created coroutine might be run on an existing cctx which most
876 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
877 */
878 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
879 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
880
881 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
882 coro_setup_op.op_next = PL_op;
883 coro_setup_op.op_type = OP_CUSTOM;
884 coro_setup_op.op_ppaddr = pp_slf;
885 /* no flags required, as an init function won't be called */
886
887 PL_op = (OP *)&coro_setup_op;
888
889 /* copy throw, in case it was set before coro_setup */
890 CORO_THROW = coro->except;
891}
892
893static void
894coro_destruct (pTHX_ struct coro *coro)
895{
896 if (!IN_DESTRUCT)
897 {
898 /* restore all saved variables and stuff */
899 LEAVE_SCOPE (0);
900 assert (PL_tmps_floor == -1);
901
902 /* free all temporaries */
903 FREETMPS;
904 assert (PL_tmps_ix == -1);
905
906 /* unwind all extra stacks */
907 POPSTACK_TO (PL_mainstack);
908
909 /* unwind main stack */
910 dounwind (-1);
911 }
912
913 SvREFCNT_dec (GvSV (PL_defgv));
548 SvREFCNT_dec (GvAV (PL_defgv)); 914 SvREFCNT_dec (GvAV (PL_defgv));
549 GvAV (PL_defgv) = coro->args; coro->args = 0; 915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
550 919
551 SPAGAIN; 920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (CORO_THROW);
552 925
553 Zero (&myop, 1, UNOP); 926 coro_destruct_stacks (aTHX);
554 myop.op_next = Nullop;
555 myop.op_flags = OPf_WANT_VOID;
556
557 PL_op = (OP *)&myop;
558
559 PUSHMARK(SP);
560 XPUSHs (sub_init);
561 PUTBACK;
562 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563 SPAGAIN;
564
565 ENTER; /* necessary e.g. for dounwind */
566} 927}
567 928
568static void 929INLINE void
569free_coro_mortal () 930free_coro_mortal (pTHX)
570{ 931{
571 if (coro_mortal) 932 if (expect_true (coro_mortal))
572 { 933 {
573 SvREFCNT_dec (coro_mortal); 934 SvREFCNT_dec (coro_mortal);
574 coro_mortal = 0; 935 coro_mortal = 0;
575 } 936 }
576} 937}
577 938
578static void 939static int
579coro_run (void *arg) 940runops_trace (pTHX)
580{ 941{
581 /* 942 COP *oldcop = 0;
582 * this is a _very_ stripped down perl interpreter ;) 943 int oldcxix = -2;
583 */ 944 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
584 dTHX; 945 coro_cctx *cctx = coro->cctx;
585 int ret;
586 946
587 UNLOCK; 947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 {
949 PERL_ASYNC_CHECK ();
588 950
951 if (cctx->flags & CC_TRACE_ALL)
952 {
953 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
954 {
955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
956 SV **bot, **top;
957 AV *av = newAV (); /* return values */
958 SV **cb;
959 dSP;
960
961 GV *gv = CvGV (cx->blk_sub.cv);
962 SV *fullname = sv_2mortal (newSV (0));
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 bot = PL_stack_base + cx->blk_oldsp + 1;
967 top = cx->blk_gimme == G_ARRAY ? SP + 1
968 : cx->blk_gimme == G_SCALAR ? bot + 1
969 : bot;
970
971 av_extend (av, top - bot);
972 while (bot < top)
973 av_push (av, SvREFCNT_inc_NN (*bot++));
974
975 PL_runops = RUNOPS_DEFAULT;
976 ENTER;
977 SAVETMPS;
978 EXTEND (SP, 3);
979 PUSHMARK (SP);
980 PUSHs (&PL_sv_no);
981 PUSHs (fullname);
982 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
983 PUTBACK;
984 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
985 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
986 SPAGAIN;
987 FREETMPS;
988 LEAVE;
989 PL_runops = runops_trace;
990 }
991
992 if (oldcop != PL_curcop)
993 {
994 oldcop = PL_curcop;
995
996 if (PL_curcop != &PL_compiling)
997 {
998 SV **cb;
999
1000 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1001 {
1002 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1003
1004 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1005 {
1006 runops_proc_t old_runops = PL_runops;
1007 dSP;
1008 GV *gv = CvGV (cx->blk_sub.cv);
1009 SV *fullname = sv_2mortal (newSV (0));
1010
1011 if (isGV (gv))
1012 gv_efullname3 (fullname, gv, 0);
1013
1014 PL_runops = RUNOPS_DEFAULT;
1015 ENTER;
1016 SAVETMPS;
1017 EXTEND (SP, 3);
1018 PUSHMARK (SP);
1019 PUSHs (&PL_sv_yes);
1020 PUSHs (fullname);
1021 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1022 PUTBACK;
1023 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1024 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1025 SPAGAIN;
1026 FREETMPS;
1027 LEAVE;
1028 PL_runops = runops_trace;
1029 }
1030
1031 oldcxix = cxstack_ix;
1032 }
1033
1034 if (cctx->flags & CC_TRACE_LINE)
1035 {
1036 dSP;
1037
1038 PL_runops = RUNOPS_DEFAULT;
1039 ENTER;
1040 SAVETMPS;
1041 EXTEND (SP, 3);
1042 PL_runops = RUNOPS_DEFAULT;
1043 PUSHMARK (SP);
1044 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1045 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1046 PUTBACK;
1047 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1048 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1049 SPAGAIN;
1050 FREETMPS;
1051 LEAVE;
1052 PL_runops = runops_trace;
1053 }
1054 }
1055 }
1056 }
1057 }
1058
1059 TAINT_NOT;
1060 return 0;
1061}
1062
1063static struct coro_cctx *cctx_ssl_cctx;
1064static struct CoroSLF cctx_ssl_frame;
1065
1066static void
1067slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1068{
1069 ta->prev = (struct coro *)cctx_ssl_cctx;
1070 ta->next = 0;
1071}
1072
1073static int
1074slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1075{
1076 *frame = cctx_ssl_frame;
1077
1078 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1079}
1080
1081/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1082static void NOINLINE
1083cctx_prepare (pTHX_ coro_cctx *cctx)
1084{
589 PL_top_env = &PL_start_env; 1085 PL_top_env = &PL_start_env;
590 1086
591 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1087 if (cctx->flags & CC_TRACE)
592 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op)); 1088 PL_runops = runops_trace;
593 1089
594 /* continue at cctx_init, without entersub */ 1090 /* we already must be executing an SLF op, there is no other valid way
595 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE)); 1091 * that can lead to creation of a new cctx */
1092 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1093 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
596 1094
1095 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1096 cctx_ssl_cctx = cctx;
1097 cctx_ssl_frame = slf_frame;
1098
1099 slf_frame.prepare = slf_prepare_set_stacklevel;
1100 slf_frame.check = slf_check_set_stacklevel;
1101}
1102
1103/* the tail of transfer: execute stuff we can only do after a transfer */
1104INLINE void
1105transfer_tail (pTHX)
1106{
1107 free_coro_mortal (aTHX);
1108}
1109
1110/*
1111 * this is a _very_ stripped down perl interpreter ;)
1112 */
1113static void
1114cctx_run (void *arg)
1115{
1116#ifdef USE_ITHREADS
1117# if CORO_PTHREAD
1118 PERL_SET_CONTEXT (coro_thx);
1119# endif
1120#endif
1121 {
1122 dTHX;
1123
1124 /* normally we would need to skip the entersub here */
1125 /* not doing so will re-execute it, which is exactly what we want */
1126 /* PL_nop = PL_nop->op_next */
1127
1128 /* inject a fake subroutine call to cctx_init */
1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 transfer_tail (aTHX);
1133
597 /* somebody will hit me for both perl_run and PL_restartop */ 1134 /* somebody or something will hit me for both perl_run and PL_restartop */
598 ret = perl_run (aTHX_ PERL_GET_CONTEXT); 1135 PL_restartop = PL_op;
599 printf ("ret %d\n", ret);//D 1136 perl_run (PL_curinterp);
600 1137
601 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1138 /*
602 abort (); 1139 * If perl-run returns we assume exit() was being called or the coro
1140 * fell off the end, which seems to be the only valid (non-bug)
1141 * reason for perl_run to return. We try to exit by jumping to the
1142 * bootstrap-time "top" top_env, as we cannot restore the "main"
1143 * coroutine as Coro has no such concept
1144 */
1145 PL_top_env = main_top_env;
1146 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1147 }
603} 1148}
604 1149
605static coro_stack * 1150static coro_cctx *
606stack_new () 1151cctx_new ()
607{ 1152{
608 coro_stack *stack; 1153 coro_cctx *cctx;
609 1154
1155 ++cctx_count;
610 New (0, stack, 1, coro_stack); 1156 New (0, cctx, 1, coro_cctx);
1157
1158 cctx->gen = cctx_gen;
1159 cctx->flags = 0;
1160 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1161
1162 return cctx;
1163}
1164
1165/* create a new cctx only suitable as source */
1166static coro_cctx *
1167cctx_new_empty ()
1168{
1169 coro_cctx *cctx = cctx_new ();
1170
1171 cctx->sptr = 0;
1172 coro_create (&cctx->cctx, 0, 0, 0, 0);
1173
1174 return cctx;
1175}
1176
1177/* create a new cctx suitable as destination/running a perl interpreter */
1178static coro_cctx *
1179cctx_new_run ()
1180{
1181 coro_cctx *cctx = cctx_new ();
1182 void *stack_start;
1183 size_t stack_size;
611 1184
612#if HAVE_MMAP 1185#if HAVE_MMAP
613
614 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1186 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
615 /* mmap suppsedly does allocate-on-write for us */ 1187 /* mmap supposedly does allocate-on-write for us */
616 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1188 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
617 1189
618 if (stack->sptr == (void *)-1) 1190 if (cctx->sptr != (void *)-1)
1191 {
1192 #if CORO_STACKGUARD
1193 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1194 #endif
1195 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1196 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1197 cctx->flags |= CC_MAPPED;
619 { 1198 }
1199 else
1200#endif
1201 {
1202 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1203 New (0, cctx->sptr, cctx_stacksize, long);
1204
1205 if (!cctx->sptr)
1206 {
620 perror ("FATAL: unable to mmap stack for coroutine"); 1207 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
621 _exit (EXIT_FAILURE); 1208 _exit (EXIT_FAILURE);
622 } 1209 }
623 1210
624# if STACKGUARD 1211 stack_start = cctx->sptr;
625 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1212 stack_size = cctx->ssize;
626# endif
627
628#else
629
630 stack->ssize = STACKSIZE * (long)sizeof (long);
631 New (0, stack->sptr, STACKSIZE, long);
632
633 if (!stack->sptr)
634 { 1213 }
635 perror (stderr, "FATAL: unable to malloc stack for coroutine");
636 _exit (EXIT_FAILURE);
637 }
638 1214
1215 #if CORO_USE_VALGRIND
1216 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
639#endif 1217 #endif
640 1218
641 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize); 1219 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
642 1220
643 return stack; 1221 return cctx;
644} 1222}
645 1223
646static void 1224static void
647stack_free (coro_stack *stack) 1225cctx_destroy (coro_cctx *cctx)
648{ 1226{
649 if (!stack) 1227 if (!cctx)
650 return; 1228 return;
651 1229
1230 --cctx_count;
1231 coro_destroy (&cctx->cctx);
1232
1233 /* coro_transfer creates new, empty cctx's */
1234 if (cctx->sptr)
1235 {
1236 #if CORO_USE_VALGRIND
1237 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1238 #endif
1239
652#if HAVE_MMAP 1240#if HAVE_MMAP
653 munmap (stack->sptr, stack->ssize); 1241 if (cctx->flags & CC_MAPPED)
654#else 1242 munmap (cctx->sptr, cctx->ssize);
1243 else
1244#endif
655 Safefree (stack->sptr); 1245 Safefree (cctx->sptr);
656#endif
657
658 Safefree (stack);
659}
660
661static coro_stack *stack_first;
662
663static coro_stack *
664stack_get ()
665{
666 coro_stack *stack;
667
668 if (stack_first)
669 {
670 stack = stack_first;
671 stack_first = stack->next;
672 }
673 else
674 {
675 stack = stack_new ();
676 PL_op = PL_op->op_next;
677 } 1246 }
678 1247
679 return stack; 1248 Safefree (cctx);
680} 1249}
681 1250
682static void 1251/* wether this cctx should be destructed */
683stack_put (coro_stack *stack) 1252#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
684{
685 stack->next = stack_first;
686 stack_first = stack;
687}
688 1253
689/* never call directly, always through the coro_state_transfer global variable */ 1254static coro_cctx *
1255cctx_get (pTHX)
1256{
1257 while (expect_true (cctx_first))
1258 {
1259 coro_cctx *cctx = cctx_first;
1260 cctx_first = cctx->next;
1261 --cctx_idle;
1262
1263 if (expect_true (!CCTX_EXPIRED (cctx)))
1264 return cctx;
1265
1266 cctx_destroy (cctx);
1267 }
1268
1269 return cctx_new_run ();
1270}
1271
690static void 1272static void
1273cctx_put (coro_cctx *cctx)
1274{
1275 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1276
1277 /* free another cctx if overlimit */
1278 if (expect_false (cctx_idle >= cctx_max_idle))
1279 {
1280 coro_cctx *first = cctx_first;
1281 cctx_first = first->next;
1282 --cctx_idle;
1283
1284 cctx_destroy (first);
1285 }
1286
1287 ++cctx_idle;
1288 cctx->next = cctx_first;
1289 cctx_first = cctx;
1290}
1291
1292/** coroutine switching *****************************************************/
1293
1294static void
1295transfer_check (pTHX_ struct coro *prev, struct coro *next)
1296{
1297 /* TODO: throwing up here is considered harmful */
1298
1299 if (expect_true (prev != next))
1300 {
1301 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1302 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1303
1304 if (expect_false (next->flags & CF_RUNNING))
1305 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1306
1307 if (expect_false (next->flags & CF_DESTROYED))
1308 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1309
1310#if !PERL_VERSION_ATLEAST (5,10,0)
1311 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1312 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1313#endif
1314 }
1315}
1316
1317/* always use the TRANSFER macro */
1318static void NOINLINE /* noinline so we have a fixed stackframe */
691transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags) 1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
692{ 1320{
693 dSTACKLEVEL; 1321 dSTACKLEVEL;
694 1322
695 /* sometimes transfer is only called to set idle_sp */ 1323 /* sometimes transfer is only called to set idle_sp */
696 if (flags == TRANSFER_SET_STACKLEVEL) 1324 if (expect_false (!next))
1325 {
697 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
698 else if (prev != next) 1327 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
699 { 1328 }
1329 else if (expect_true (prev != next))
1330 {
700 coro_stack *prev__stack; 1331 coro_cctx *prev__cctx;
701 1332
702 LOCK; 1333 if (expect_false (prev->flags & CF_NEW))
703
704 if (next->mainstack)
705 { 1334 {
706 /* coroutine already started */ 1335 /* create a new empty/source context */
707 SAVE (prev, flags); 1336 prev->cctx = cctx_new_empty ();
708 LOAD (next); 1337 prev->flags &= ~CF_NEW;
1338 prev->flags |= CF_RUNNING;
1339 }
1340
1341 prev->flags &= ~CF_RUNNING;
1342 next->flags |= CF_RUNNING;
1343
1344 /* first get rid of the old state */
1345 save_perl (aTHX_ prev);
1346
1347 if (expect_false (next->flags & CF_NEW))
1348 {
1349 /* need to start coroutine */
1350 next->flags &= ~CF_NEW;
1351 /* setup coroutine call */
1352 coro_setup (aTHX_ next);
709 } 1353 }
710 else 1354 else
1355 load_perl (aTHX_ next);
1356
1357 prev__cctx = prev->cctx;
1358
1359 /* possibly untie and reuse the cctx */
1360 if (expect_true (
1361 prev__cctx->idle_sp == STACKLEVEL
1362 && !(prev__cctx->flags & CC_TRACE)
1363 && !force_cctx
1364 ))
711 { 1365 {
712 /* need to start coroutine */ 1366 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
713 /* first get rid of the old state */ 1367 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
714 SAVE (prev, -1); 1368
715 /* setup coroutine call */ 1369 prev->cctx = 0;
716 setup_coro (next); 1370
717 /* need a stack */ 1371 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
718 next->stack = 0; 1372 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1373 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1374 if (!next->cctx)
1375 next->cctx = cctx_get (aTHX);
1376
1377 cctx_put (prev__cctx);
719 } 1378 }
720 1379
721 if (!prev->stack) 1380 ++next->usecount;
722 /* create a new empty context */
723 Newz (0, prev->stack, 1, coro_stack);
724 1381
725 prev__stack = prev->stack; 1382 if (expect_true (!next->cctx))
1383 next->cctx = cctx_get (aTHX);
726 1384
727 /* possibly "free" the stack */ 1385 if (expect_false (prev__cctx != next->cctx))
728 if (prev__stack->idle_sp == STACKLEVEL)
729 { 1386 {
730 stack_put (prev__stack); 1387 prev__cctx->top_env = PL_top_env;
731 prev->stack = 0; 1388 PL_top_env = next->cctx->top_env;
1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
732 } 1390 }
733 1391
734 if (!next->stack) 1392 transfer_tail (aTHX);
735 next->stack = stack_get ();
736
737 if (prev__stack != next->stack)
738 {
739 prev__stack->top_env = PL_top_env;
740 PL_top_env = next->stack->top_env;
741 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
742 }
743
744 free_coro_mortal ();
745
746 UNLOCK;
747 } 1393 }
748} 1394}
749 1395
750/* use this function pointer to call the above function */ 1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
751/* this is done to increase chances of the compiler not inlining the call */ 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
752/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754 1398
755struct transfer_args 1399/** high level stuff ********************************************************/
756{
757 struct coro *prev, *next;
758 int flags;
759};
760 1400
761#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
762
763static void 1401static int
764coro_state_destroy (struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
765{ 1403{
766 if (coro->refcnt--) 1404 if (coro->flags & CF_DESTROYED)
767 return; 1405 return 0;
1406
1407 if (coro->on_destroy)
1408 coro->on_destroy (aTHX_ coro);
1409
1410 coro->flags |= CF_DESTROYED;
1411
1412 if (coro->flags & CF_READY)
1413 {
1414 /* reduce nready, as destroying a ready coro effectively unreadies it */
1415 /* alternative: look through all ready queues and remove the coro */
1416 --coro_nready;
1417 }
1418 else
1419 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768 1420
769 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
770 { 1422 {
771 struct coro temp; 1423 struct coro temp;
772 1424
773 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1426
1427 save_perl (aTHX_ &temp);
774 LOAD (aTHX_ coro); 1428 load_perl (aTHX_ coro);
775 1429
776 destroy_stacks (aTHX); 1430 coro_destruct (aTHX_ coro);
777 1431
778 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1432 load_perl (aTHX_ &temp);
779 1433
780 coro->mainstack = 0; 1434 coro->slot = 0;
781 } 1435 }
782 1436
783 stack_free (coro->stack); 1437 cctx_destroy (coro->cctx);
784 SvREFCNT_dec (coro->args); 1438 SvREFCNT_dec (coro->args);
785 Safefree (coro); 1439
1440 if (coro->next) coro->next->prev = coro->prev;
1441 if (coro->prev) coro->prev->next = coro->next;
1442 if (coro == coro_first) coro_first = coro->next;
1443
1444 return 1;
786} 1445}
787 1446
788static int 1447static int
789coro_state_clear (SV *sv, MAGIC *mg) 1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790{ 1449{
791 struct coro *coro = (struct coro *)mg->mg_ptr; 1450 struct coro *coro = (struct coro *)mg->mg_ptr;
792 mg->mg_ptr = 0; 1451 mg->mg_ptr = 0;
793 1452
1453 coro->hv = 0;
1454
1455 if (--coro->refcnt < 0)
1456 {
794 coro_state_destroy (coro); 1457 coro_state_destroy (aTHX_ coro);
1458 Safefree (coro);
1459 }
795 1460
796 return 0; 1461 return 0;
797} 1462}
798 1463
799static int 1464static int
800coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1465coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801{ 1466{
802 struct coro *coro = (struct coro *)mg->mg_ptr; 1467 struct coro *coro = (struct coro *)mg->mg_ptr;
803 1468
804 ++coro->refcnt; 1469 ++coro->refcnt;
805 1470
806 return 0; 1471 return 0;
807} 1472}
808 1473
809static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1474static MGVTBL coro_state_vtbl = {
1475 0, 0, 0, 0,
1476 coro_state_free,
1477 0,
1478#ifdef MGf_DUP
1479 coro_state_dup,
1480#else
1481# define MGf_DUP 0
1482#endif
1483};
810 1484
811static struct coro *
812SvSTATE (SV *coro)
813{
814 HV *stash;
815 MAGIC *mg;
816
817 if (SvROK (coro))
818 coro = SvRV (coro);
819
820 stash = SvSTASH (coro);
821 if (stash != coro_stash && stash != coro_state_stash)
822 {
823 /* very slow, but rare, check */
824 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825 croak ("Coro::State object required");
826 }
827
828 mg = SvMAGIC (coro);
829 assert (mg->mg_type == PERL_MAGIC_ext);
830 return (struct coro *)mg->mg_ptr;
831}
832
833static void 1485static void
834prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags) 1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
835{ 1487{
836 ta->prev = SvSTATE (prev); 1488 ta->prev = SvSTATE (prev_sv);
837 ta->next = SvSTATE (next); 1489 ta->next = SvSTATE (next_sv);
838 ta->flags = flags; 1490 TRANSFER_CHECK (*ta);
839} 1491}
840 1492
841static void 1493static void
842api_transfer (SV *prev, SV *next, int flags) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
843{ 1495{
844 dTHX;
845 struct transfer_args ta; 1496 struct coro_transfer_args ta;
846 1497
847 prepare_transfer (aTHX_ &ta, prev, next, flags); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848 TRANSFER (ta); 1499 TRANSFER (ta, 1);
849} 1500}
850 1501
851/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
852 1503
853#define PRIO_MAX 3 1504INLINE void
854#define PRIO_HIGH 1 1505coro_enq (pTHX_ struct coro *coro)
855#define PRIO_NORMAL 0 1506{
856#define PRIO_LOW -1 1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
857#define PRIO_IDLE -3 1508}
858#define PRIO_MIN -4
859 1509
860/* for Coro.pm */ 1510INLINE SV *
861static GV *coro_current, *coro_idle; 1511coro_deq (pTHX)
862static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863static int coro_nready;
864
865static void
866coro_enq (pTHX_ SV *sv)
867{ 1512{
868 int prio; 1513 int prio;
869 1514
870 if (SvTYPE (sv) != SVt_PVHV) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
871 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1516 if (AvFILLp (coro_ready [prio]) >= 0)
1517 return av_shift (coro_ready [prio]);
872 1518
873 prio = SvSTATE (sv)->prio; 1519 return 0;
1520}
874 1521
875 av_push (coro_ready [prio - PRIO_MIN], sv); 1522static int
1523api_ready (pTHX_ SV *coro_sv)
1524{
1525 struct coro *coro;
1526 SV *sv_hook;
1527 void (*xs_hook)(void);
1528
1529 if (SvROK (coro_sv))
1530 coro_sv = SvRV (coro_sv);
1531
1532 coro = SvSTATE (coro_sv);
1533
1534 if (coro->flags & CF_READY)
1535 return 0;
1536
1537 coro->flags |= CF_READY;
1538
1539 sv_hook = coro_nready ? 0 : coro_readyhook;
1540 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1541
1542 coro_enq (aTHX_ coro);
876 coro_nready++; 1543 ++coro_nready;
1544
1545 if (sv_hook)
1546 {
1547 dSP;
1548
1549 ENTER;
1550 SAVETMPS;
1551
1552 PUSHMARK (SP);
1553 PUTBACK;
1554 call_sv (sv_hook, G_VOID | G_DISCARD);
1555
1556 FREETMPS;
1557 LEAVE;
1558 }
1559
1560 if (xs_hook)
1561 xs_hook ();
1562
1563 return 1;
1564}
1565
1566static int
1567api_is_ready (pTHX_ SV *coro_sv)
1568{
1569 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1570}
1571
1572INLINE void
1573prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1574{
1575 SV *prev_sv, *next_sv;
1576
1577 for (;;)
1578 {
1579 next_sv = coro_deq (aTHX);
1580
1581 /* nothing to schedule: call the idle handler */
1582 if (expect_false (!next_sv))
1583 {
1584 dSP;
1585
1586 ENTER;
1587 SAVETMPS;
1588
1589 PUSHMARK (SP);
1590 PUTBACK;
1591 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1592
1593 FREETMPS;
1594 LEAVE;
1595 continue;
1596 }
1597
1598 ta->next = SvSTATE_hv (next_sv);
1599
1600 /* cannot transfer to destroyed coros, skip and look for next */
1601 if (expect_false (ta->next->flags & CF_DESTROYED))
1602 {
1603 SvREFCNT_dec (next_sv);
1604 /* coro_nready has already been taken care of by destroy */
1605 continue;
1606 }
1607
1608 --coro_nready;
1609 break;
1610 }
1611
1612 /* free this only after the transfer */
1613 prev_sv = SvRV (coro_current);
1614 ta->prev = SvSTATE_hv (prev_sv);
1615 TRANSFER_CHECK (*ta);
1616 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1617 ta->next->flags &= ~CF_READY;
1618 SvRV_set (coro_current, next_sv);
1619
1620 free_coro_mortal (aTHX);
1621 coro_mortal = prev_sv;
1622}
1623
1624INLINE void
1625prepare_cede (pTHX_ struct coro_transfer_args *ta)
1626{
1627 api_ready (aTHX_ coro_current);
1628 prepare_schedule (aTHX_ ta);
1629}
1630
1631INLINE void
1632prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1633{
1634 SV *prev = SvRV (coro_current);
1635
1636 if (coro_nready)
1637 {
1638 prepare_schedule (aTHX_ ta);
1639 api_ready (aTHX_ prev);
1640 }
1641 else
1642 prepare_nop (aTHX_ ta);
1643}
1644
1645static void
1646api_schedule (pTHX)
1647{
1648 struct coro_transfer_args ta;
1649
1650 prepare_schedule (aTHX_ &ta);
1651 TRANSFER (ta, 1);
1652}
1653
1654static int
1655api_cede (pTHX)
1656{
1657 struct coro_transfer_args ta;
1658
1659 prepare_cede (aTHX_ &ta);
1660
1661 if (expect_true (ta.prev != ta.next))
1662 {
1663 TRANSFER (ta, 1);
1664 return 1;
1665 }
1666 else
1667 return 0;
1668}
1669
1670static int
1671api_cede_notself (pTHX)
1672{
1673 if (coro_nready)
1674 {
1675 struct coro_transfer_args ta;
1676
1677 prepare_cede_notself (aTHX_ &ta);
1678 TRANSFER (ta, 1);
1679 return 1;
1680 }
1681 else
1682 return 0;
1683}
1684
1685static void
1686api_trace (pTHX_ SV *coro_sv, int flags)
1687{
1688 struct coro *coro = SvSTATE (coro_sv);
1689
1690 if (flags & CC_TRACE)
1691 {
1692 if (!coro->cctx)
1693 coro->cctx = cctx_new_run ();
1694 else if (!(coro->cctx->flags & CC_TRACE))
1695 croak ("cannot enable tracing on coroutine with custom stack,");
1696
1697 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1698 }
1699 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1700 {
1701 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1702
1703 if (coro->flags & CF_RUNNING)
1704 PL_runops = RUNOPS_DEFAULT;
1705 else
1706 coro->slot->runops = RUNOPS_DEFAULT;
1707 }
1708}
1709
1710/*****************************************************************************/
1711/* schedule-like-function opcode (SLF) */
1712
1713static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1714static const CV *slf_cv;
1715static SV **slf_argv;
1716static int slf_argc, slf_arga; /* count, allocated */
1717static I32 slf_ax; /* top of stack, for restore */
1718
1719/* this restores the stack in the case we patched the entersub, to */
1720/* recreate the stack frame as perl will on following calls */
1721/* since entersub cleared the stack */
1722static OP *
1723pp_restore (pTHX)
1724{
1725 int i;
1726 SV **SP = PL_stack_base + slf_ax;
1727
1728 PUSHMARK (SP);
1729
1730 EXTEND (SP, slf_argc + 1);
1731
1732 for (i = 0; i < slf_argc; ++i)
1733 PUSHs (sv_2mortal (slf_argv [i]));
1734
1735 PUSHs ((SV *)CvGV (slf_cv));
1736
1737 RETURNOP (slf_restore.op_first);
1738}
1739
1740static void
1741slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1742{
1743 SV **arg = (SV **)slf_frame.data;
1744
1745 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1746}
1747
1748static void
1749slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1750{
1751 if (items != 2)
1752 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1753
1754 frame->prepare = slf_prepare_transfer;
1755 frame->check = slf_check_nop;
1756 frame->data = (void *)arg; /* let's hope it will stay valid */
1757}
1758
1759static void
1760slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1761{
1762 frame->prepare = prepare_schedule;
1763 frame->check = slf_check_nop;
1764}
1765
1766static void
1767slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1768{
1769 frame->prepare = prepare_cede;
1770 frame->check = slf_check_nop;
1771}
1772
1773static void
1774slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1775{
1776 frame->prepare = prepare_cede_notself;
1777 frame->check = slf_check_nop;
1778}
1779
1780/*
1781 * these not obviously related functions are all rolled into one
1782 * function to increase chances that they all will call transfer with the same
1783 * stack offset
1784 * SLF stands for "schedule-like-function".
1785 */
1786static OP *
1787pp_slf (pTHX)
1788{
1789 I32 checkmark; /* mark SP to see how many elements check has pushed */
1790
1791 /* set up the slf frame, unless it has already been set-up */
1792 /* the latter happens when a new coro has been started */
1793 /* or when a new cctx was attached to an existing coroutine */
1794 if (expect_true (!slf_frame.prepare))
1795 {
1796 /* first iteration */
1797 dSP;
1798 SV **arg = PL_stack_base + TOPMARK + 1;
1799 int items = SP - arg; /* args without function object */
1800 SV *gv = *sp;
1801
1802 /* do a quick consistency check on the "function" object, and if it isn't */
1803 /* for us, divert to the real entersub */
1804 if (SvTYPE (gv) != SVt_PVGV
1805 || !GvCV (gv)
1806 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1807 return PL_ppaddr[OP_ENTERSUB](aTHX);
1808
1809 if (!(PL_op->op_flags & OPf_STACKED))
1810 {
1811 /* ampersand-form of call, use @_ instead of stack */
1812 AV *av = GvAV (PL_defgv);
1813 arg = AvARRAY (av);
1814 items = AvFILLp (av) + 1;
1815 }
1816
1817 /* now call the init function, which needs to set up slf_frame */
1818 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1819 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1820
1821 /* pop args */
1822 SP = PL_stack_base + POPMARK;
1823
1824 PUTBACK;
1825 }
1826
1827 /* now that we have a slf_frame, interpret it! */
1828 /* we use a callback system not to make the code needlessly */
1829 /* complicated, but so we can run multiple perl coros from one cctx */
1830
1831 do
1832 {
1833 struct coro_transfer_args ta;
1834
1835 slf_frame.prepare (aTHX_ &ta);
1836 TRANSFER (ta, 0);
1837
1838 checkmark = PL_stack_sp - PL_stack_base;
1839 }
1840 while (slf_frame.check (aTHX_ &slf_frame));
1841
1842 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1843
1844 /* exception handling */
1845 if (expect_false (CORO_THROW))
1846 {
1847 SV *exception = sv_2mortal (CORO_THROW);
1848
1849 CORO_THROW = 0;
1850 sv_setsv (ERRSV, exception);
1851 croak (0);
1852 }
1853
1854 /* return value handling - mostly like entersub */
1855 /* make sure we put something on the stack in scalar context */
1856 if (GIMME_V == G_SCALAR)
1857 {
1858 dSP;
1859 SV **bot = PL_stack_base + checkmark;
1860
1861 if (sp == bot) /* too few, push undef */
1862 bot [1] = &PL_sv_undef;
1863 else if (sp != bot + 1) /* too many, take last one */
1864 bot [1] = *sp;
1865
1866 SP = bot + 1;
1867
1868 PUTBACK;
1869 }
1870
1871 return NORMAL;
1872}
1873
1874static void
1875api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
1876{
1877 int i;
1878 SV **arg = PL_stack_base + ax;
1879 int items = PL_stack_sp - arg + 1;
1880
1881 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
1882
1883 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
1884 && PL_op->op_ppaddr != pp_slf)
1885 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
1886
1887 CvFLAGS (cv) |= CVf_SLF;
1888 CvXSUBANY (cv).any_ptr = (void *)init_cb;
1889 slf_cv = cv;
1890
1891 /* we patch the op, and then re-run the whole call */
1892 /* we have to put the same argument on the stack for this to work */
1893 /* and this will be done by pp_restore */
1894 slf_restore.op_next = (OP *)&slf_restore;
1895 slf_restore.op_type = OP_CUSTOM;
1896 slf_restore.op_ppaddr = pp_restore;
1897 slf_restore.op_first = PL_op;
1898
1899 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
1900
1901 if (PL_op->op_flags & OPf_STACKED)
1902 {
1903 if (items > slf_arga)
1904 {
1905 slf_arga = items;
1906 free (slf_argv);
1907 slf_argv = malloc (slf_arga * sizeof (SV *));
1908 }
1909
1910 slf_argc = items;
1911
1912 for (i = 0; i < items; ++i)
1913 slf_argv [i] = SvREFCNT_inc (arg [i]);
1914 }
1915 else
1916 slf_argc = 0;
1917
1918 PL_op->op_ppaddr = pp_slf;
1919 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
1920
1921 PL_op = (OP *)&slf_restore;
1922}
1923
1924/*****************************************************************************/
1925/* PerlIO::cede */
1926
1927typedef struct
1928{
1929 PerlIOBuf base;
1930 NV next, every;
1931} PerlIOCede;
1932
1933static IV
1934PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1935{
1936 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1937
1938 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1939 self->next = nvtime () + self->every;
1940
1941 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
877} 1942}
878 1943
879static SV * 1944static SV *
880coro_deq (pTHX_ int min_prio) 1945PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
881{ 1946{
882 int prio = PRIO_MAX - PRIO_MIN; 1947 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
883 1948
884 min_prio -= PRIO_MIN; 1949 return newSVnv (self->every);
885 if (min_prio < 0) 1950}
886 min_prio = 0;
887 1951
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1952static IV
889 if (AvFILLp (coro_ready [prio]) >= 0) 1953PerlIOCede_flush (pTHX_ PerlIO *f)
1954{
1955 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1956 double now = nvtime ();
1957
1958 if (now >= self->next)
890 { 1959 {
891 coro_nready--; 1960 api_cede (aTHX);
892 return av_shift (coro_ready [prio]); 1961 self->next = now + self->every;
893 } 1962 }
1963
1964 return PerlIOBuf_flush (aTHX_ f);
1965}
1966
1967static PerlIO_funcs PerlIO_cede =
1968{
1969 sizeof(PerlIO_funcs),
1970 "cede",
1971 sizeof(PerlIOCede),
1972 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1973 PerlIOCede_pushed,
1974 PerlIOBuf_popped,
1975 PerlIOBuf_open,
1976 PerlIOBase_binmode,
1977 PerlIOCede_getarg,
1978 PerlIOBase_fileno,
1979 PerlIOBuf_dup,
1980 PerlIOBuf_read,
1981 PerlIOBuf_unread,
1982 PerlIOBuf_write,
1983 PerlIOBuf_seek,
1984 PerlIOBuf_tell,
1985 PerlIOBuf_close,
1986 PerlIOCede_flush,
1987 PerlIOBuf_fill,
1988 PerlIOBase_eof,
1989 PerlIOBase_error,
1990 PerlIOBase_clearerr,
1991 PerlIOBase_setlinebuf,
1992 PerlIOBuf_get_base,
1993 PerlIOBuf_bufsiz,
1994 PerlIOBuf_get_ptr,
1995 PerlIOBuf_get_cnt,
1996 PerlIOBuf_set_ptrcnt,
1997};
1998
1999/*****************************************************************************/
2000/* Coro::Semaphore */
2001
2002static void
2003coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2004{
2005 SV *count_sv = AvARRAY (av)[0];
2006 IV count = SvIVX (count_sv);
2007
2008 count += adjust;
2009 SvIVX (count_sv) = count;
2010
2011 /* now wake up as many waiters as are expected to lock */
2012 while (count > 0 && AvFILLp (av) > 0)
2013 {
2014 SV *cb;
2015
2016 /* swap first two elements so we can shift a waiter */
2017 AvARRAY (av)[0] = AvARRAY (av)[1];
2018 AvARRAY (av)[1] = count_sv;
2019 cb = av_shift (av);
2020
2021 if (SvOBJECT (cb))
2022 api_ready (aTHX_ cb);
2023 else
2024 croak ("callbacks not yet supported");
2025
2026 SvREFCNT_dec (cb);
2027
2028 --count;
2029 }
2030}
2031
2032static void
2033coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2034{
2035 /* call $sem->adjust (0) to possibly wake up some other waiters */
2036 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2037}
2038
2039static int
2040slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2041{
2042 AV *av = (AV *)frame->data;
2043 SV *count_sv = AvARRAY (av)[0];
2044
2045 /* if we are about to throw, don't actually acquire the lock, just throw */
2046 if (CORO_THROW)
2047 return 0;
2048 else if (SvIVX (count_sv) > 0)
2049 {
2050 SvSTATE_current->on_destroy = 0;
2051 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2052 return 0;
2053 }
2054 else
2055 {
2056 int i;
2057 /* if we were woken up but can't down, we look through the whole */
2058 /* waiters list and only add us if we aren't in there already */
2059 /* this avoids some degenerate memory usage cases */
2060
2061 for (i = 1; i <= AvFILLp (av); ++i)
2062 if (AvARRAY (av)[i] == SvRV (coro_current))
2063 return 1;
2064
2065 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2066 return 1;
2067 }
2068}
2069
2070static void
2071slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2072{
2073 AV *av = (AV *)SvRV (arg [0]);
2074
2075 if (SvIVX (AvARRAY (av)[0]) > 0)
2076 {
2077 frame->data = (void *)av;
2078 frame->prepare = prepare_nop;
2079 }
2080 else
2081 {
2082 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2083
2084 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2085 frame->prepare = prepare_schedule;
2086
2087 /* to avoid race conditions when a woken-up coro gets terminated */
2088 /* we arrange for a temporary on_destroy that calls adjust (0) */
2089 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2090 }
2091
2092 frame->check = slf_check_semaphore_down;
2093
2094}
2095
2096/*****************************************************************************/
2097/* gensub: simple closure generation utility */
2098
2099#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2100
2101/* create a closure from XS, returns a code reference */
2102/* the arg can be accessed via GENSUB_ARG from the callback */
2103/* the callback must use dXSARGS/XSRETURN */
2104static SV *
2105gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2106{
2107 CV *cv = (CV *)newSV (0);
2108
2109 sv_upgrade ((SV *)cv, SVt_PVCV);
2110
2111 CvANON_on (cv);
2112 CvISXSUB_on (cv);
2113 CvXSUB (cv) = xsub;
2114 GENSUB_ARG = arg;
2115
2116 return newRV_noinc ((SV *)cv);
2117}
2118
2119/*****************************************************************************/
2120/* Coro::AIO */
2121
2122#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2123
2124/* helper storage struct */
2125struct io_state
2126{
2127 int errorno;
2128 I32 laststype; /* U16 in 5.10.0 */
2129 int laststatval;
2130 Stat_t statcache;
2131};
2132
2133static void
2134coro_aio_callback (pTHX_ CV *cv)
2135{
2136 dXSARGS;
2137 AV *state = (AV *)GENSUB_ARG;
2138 SV *coro = av_pop (state);
2139 SV *data_sv = newSV (sizeof (struct io_state));
2140
2141 av_extend (state, items);
2142
2143 sv_upgrade (data_sv, SVt_PV);
2144 SvCUR_set (data_sv, sizeof (struct io_state));
2145 SvPOK_only (data_sv);
2146
2147 {
2148 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2149
2150 data->errorno = errno;
2151 data->laststype = PL_laststype;
2152 data->laststatval = PL_laststatval;
2153 data->statcache = PL_statcache;
2154 }
2155
2156 /* now build the result vector out of all the parameters and the data_sv */
2157 {
2158 int i;
2159
2160 for (i = 0; i < items; ++i)
2161 av_push (state, SvREFCNT_inc_NN (ST (i)));
2162 }
2163
2164 av_push (state, data_sv);
2165
2166 api_ready (aTHX_ coro);
2167 SvREFCNT_dec (coro);
2168 SvREFCNT_dec ((AV *)state);
2169}
2170
2171static int
2172slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2173{
2174 AV *state = (AV *)frame->data;
2175
2176 /* if we are about to throw, return early */
2177 /* this does not cancel the aio request, but at least */
2178 /* it quickly returns */
2179 if (CORO_THROW)
2180 return 0;
2181
2182 /* one element that is an RV? repeat! */
2183 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2184 return 1;
2185
2186 /* restore status */
2187 {
2188 SV *data_sv = av_pop (state);
2189 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2190
2191 errno = data->errorno;
2192 PL_laststype = data->laststype;
2193 PL_laststatval = data->laststatval;
2194 PL_statcache = data->statcache;
2195
2196 SvREFCNT_dec (data_sv);
2197 }
2198
2199 /* push result values */
2200 {
2201 dSP;
2202 int i;
2203
2204 EXTEND (SP, AvFILLp (state) + 1);
2205 for (i = 0; i <= AvFILLp (state); ++i)
2206 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2207
2208 PUTBACK;
2209 }
894 2210
895 return 0; 2211 return 0;
896} 2212}
897 2213
898static void 2214static void
899api_ready (SV *coro) 2215slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
900{ 2216{
901 dTHX; 2217 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2218 SV *coro_hv = SvRV (coro_current);
2219 struct coro *coro = SvSTATE_hv (coro_hv);
902 2220
903 if (SvROK (coro)) 2221 /* put our coroutine id on the state arg */
904 coro = SvRV (coro); 2222 av_push (state, SvREFCNT_inc_NN (coro_hv));
905 2223
906 LOCK; 2224 /* first see whether we have a non-zero priority and set it as AIO prio */
907 coro_enq (aTHX_ SvREFCNT_inc (coro)); 2225 if (coro->prio)
908 UNLOCK;
909}
910
911static void
912prepare_schedule (aTHX_ struct transfer_args *ta)
913{
914 SV *current, *prev, *next;
915
916 LOCK;
917
918 current = GvSV (coro_current);
919
920 for (;;)
921 {
922 LOCK;
923
924 next = coro_deq (aTHX_ PRIO_MIN);
925
926 if (next)
927 break;
928
929 UNLOCK;
930
931 { 2226 {
932 dSP; 2227 dSP;
933 2228
934 ENTER; 2229 static SV *prio_cv;
935 SAVETMPS; 2230 static SV *prio_sv;
936 2231
2232 if (expect_false (!prio_cv))
2233 {
2234 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2235 prio_sv = newSViv (0);
2236 }
2237
937 PUSHMARK (SP); 2238 PUSHMARK (SP);
2239 sv_setiv (prio_sv, coro->prio);
2240 XPUSHs (prio_sv);
2241
938 PUTBACK; 2242 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD); 2243 call_sv (prio_cv, G_VOID | G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 } 2244 }
2245
2246 /* now call the original request */
2247 {
2248 dSP;
2249 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2250 int i;
2251
2252 PUSHMARK (SP);
2253
2254 /* first push all args to the stack */
2255 EXTEND (SP, items + 1);
2256
2257 for (i = 0; i < items; ++i)
2258 PUSHs (arg [i]);
2259
2260 /* now push the callback closure */
2261 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2262
2263 /* now call the AIO function - we assume our request is uncancelable */
2264 PUTBACK;
2265 call_sv ((SV *)req, G_VOID | G_DISCARD);
944 } 2266 }
945 2267
946 prev = SvRV (current); 2268 /* now that the requets is going, we loop toll we have a result */
947 SvRV (current) = next; 2269 frame->data = (void *)state;
948 2270 frame->prepare = prepare_schedule;
949 /* free this only after the transfer */ 2271 frame->check = slf_check_aio_req;
950 free_coro_mortal ();
951 coro_mortal = prev;
952
953 ta->prev = SvSTATE (prev);
954 ta->next = SvSTATE (next);
955 ta->flags = TRANSFER_SAVE_ALL;
956
957 UNLOCK;
958} 2272}
959 2273
960static void 2274static void
961prepare_cede (aTHX_ struct transfer_args *ta) 2275coro_aio_req_xs (pTHX_ CV *cv)
962{ 2276{
963 LOCK; 2277 dXSARGS;
964 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966 2278
967 prepare_schedule (ta); 2279 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
968}
969 2280
970static void 2281 XSRETURN_EMPTY;
971api_schedule (void)
972{
973 dTHX;
974 struct transfer_args ta;
975
976 prepare_schedule (&ta);
977 TRANSFER (ta);
978} 2282}
979 2283
980static void 2284/*****************************************************************************/
981api_cede (void)
982{
983 dTHX;
984 struct transfer_args ta;
985 2285
986 prepare_cede (&ta);
987 TRANSFER (ta);
988}
989
990MODULE = Coro::State PACKAGE = Coro::State 2286MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 2287
992PROTOTYPES: DISABLE 2288PROTOTYPES: DISABLE
993 2289
994BOOT: 2290BOOT:
995{ 2291{
996#ifdef USE_ITHREADS 2292#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 2293# if CORO_PTHREAD
2294 coro_thx = PERL_GET_CONTEXT;
2295# endif
998#endif 2296#endif
999 BOOT_PAGESIZE; 2297 BOOT_PAGESIZE;
1000 2298
2299 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2300 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2301
2302 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2303 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2304 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2305
2306 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2307 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2308 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2309
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2310 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 2311
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2312 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2313 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2314 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2315 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006 2316
1007 main_mainstack = PL_mainstack; 2317 main_mainstack = PL_mainstack;
2318 main_top_env = PL_top_env;
1008 2319
2320 while (main_top_env->je_prev)
2321 main_top_env = main_top_env->je_prev;
2322
2323 {
2324 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2325
2326 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2327 hv_store_ent (PL_custom_op_names, slf,
2328 newSVpv ("coro_slf", 0), 0);
2329
2330 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2331 hv_store_ent (PL_custom_op_descs, slf,
2332 newSVpv ("coro schedule like function", 0), 0);
2333 }
2334
1009 coroapi.ver = CORO_API_VERSION; 2335 coroapi.ver = CORO_API_VERSION;
2336 coroapi.rev = CORO_API_REVISION;
2337
1010 coroapi.transfer = api_transfer; 2338 coroapi.transfer = api_transfer;
2339
2340 coroapi.sv_state = SvSTATE_;
2341 coroapi.execute_slf = api_execute_slf;
2342 coroapi.prepare_nop = prepare_nop;
2343 coroapi.prepare_schedule = prepare_schedule;
2344 coroapi.prepare_cede = prepare_cede;
2345 coroapi.prepare_cede_notself = prepare_cede_notself;
2346
2347 {
2348 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2349
2350 if (!svp) croak ("Time::HiRes is required");
2351 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2352
2353 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2354 }
1011 2355
1012 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2356 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1013} 2357}
1014 2358
1015SV * 2359SV *
1016new (char *klass, ...) 2360new (char *klass, ...)
1017 CODE: 2361 CODE:
1018{ 2362{
1019 struct coro *coro; 2363 struct coro *coro;
2364 MAGIC *mg;
1020 HV *hv; 2365 HV *hv;
1021 int i; 2366 int i;
1022 2367
1023 Newz (0, coro, 1, struct coro); 2368 Newz (0, coro, 1, struct coro);
1024 coro->args = newAV (); 2369 coro->args = newAV ();
2370 coro->flags = CF_NEW;
1025 2371
2372 if (coro_first) coro_first->prev = coro;
2373 coro->next = coro_first;
2374 coro_first = coro;
2375
1026 hv = newHV (); 2376 coro->hv = hv = newHV ();
1027 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2377 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2378 mg->mg_flags |= MGf_DUP;
1028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2379 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029 2380
2381 av_extend (coro->args, items - 1);
1030 for (i = 1; i < items; i++) 2382 for (i = 1; i < items; i++)
1031 av_push (coro->args, newSVsv (ST (i))); 2383 av_push (coro->args, newSVsv (ST (i)));
1032
1033 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1034 /*coro->stack = 0;*/
1035} 2384}
1036 OUTPUT: 2385 OUTPUT:
1037 RETVAL 2386 RETVAL
1038 2387
1039void 2388void
1040_set_stacklevel (...) 2389transfer (...)
1041 ALIAS: 2390 PROTOTYPE: $$
1042 Coro::State::transfer = 1 2391 CODE:
1043 Coro::schedule = 2 2392 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1044 Coro::cede = 3
1045 Coro::Cont::yield = 4
1046 CODE:
1047{
1048 struct transfer_args ta;
1049 2393
1050 switch (ix) 2394bool
1051 { 2395_destroy (SV *coro_sv)
1052 case 0: 2396 CODE:
1053 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 2397 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1054 ta.next = 0; 2398 OUTPUT:
1055 ta.flags = TRANSFER_SET_STACKLEVEL; 2399 RETVAL
1056 break;
1057
1058 case 1:
1059 if (items != 3)
1060 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1061
1062 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1063 break;
1064
1065 case 2:
1066 prepare_schedule (&ta);
1067 break;
1068
1069 case 3:
1070 prepare_cede (&ta);
1071 break;
1072
1073 case 4:
1074 {
1075 SV *yieldstack;
1076 SV *sv;
1077 AV *defav = GvAV (PL_defgv);
1078
1079 yieldstack = *hv_fetch (
1080 (HV *)SvRV (GvSV (coro_current)),
1081 "yieldstack", sizeof ("yieldstack") - 1,
1082 0
1083 );
1084
1085 /* set up @_ -- ugly */
1086 av_clear (defav);
1087 av_fill (defav, items - 1);
1088 while (items--)
1089 av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091 sv = av_pop ((AV *)SvRV (yieldstack));
1092 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094 ta.flags = 0;
1095 SvREFCNT_dec (sv);
1096 }
1097 break;
1098
1099 }
1100
1101 TRANSFER (ta);
1102}
1103 2400
1104void 2401void
1105_clone_state_from (SV *dst, SV *src)
1106 CODE:
1107{
1108 struct coro *coro_src = SvSTATE (src);
1109
1110 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112 ++coro_src->refcnt;
1113 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114}
1115
1116void
1117_nonlocal_goto (IV nextop)
1118 CODE:
1119 /* uuh, somebody will kill me again for this */
1120 PL_op->op_next = INT2PTR (OP *, nextop);
1121
1122void
1123_exit (code) 2402_exit (int code)
1124 int code
1125 PROTOTYPE: $ 2403 PROTOTYPE: $
1126 CODE: 2404 CODE:
1127 _exit (code); 2405 _exit (code);
1128 2406
2407int
2408cctx_stacksize (int new_stacksize = 0)
2409 PROTOTYPE: ;$
2410 CODE:
2411 RETVAL = cctx_stacksize;
2412 if (new_stacksize)
2413 {
2414 cctx_stacksize = new_stacksize;
2415 ++cctx_gen;
2416 }
2417 OUTPUT:
2418 RETVAL
2419
2420int
2421cctx_max_idle (int max_idle = 0)
2422 PROTOTYPE: ;$
2423 CODE:
2424 RETVAL = cctx_max_idle;
2425 if (max_idle > 1)
2426 cctx_max_idle = max_idle;
2427 OUTPUT:
2428 RETVAL
2429
2430int
2431cctx_count ()
2432 PROTOTYPE:
2433 CODE:
2434 RETVAL = cctx_count;
2435 OUTPUT:
2436 RETVAL
2437
2438int
2439cctx_idle ()
2440 PROTOTYPE:
2441 CODE:
2442 RETVAL = cctx_idle;
2443 OUTPUT:
2444 RETVAL
2445
2446void
2447list ()
2448 PROTOTYPE:
2449 PPCODE:
2450{
2451 struct coro *coro;
2452 for (coro = coro_first; coro; coro = coro->next)
2453 if (coro->hv)
2454 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2455}
2456
2457void
2458call (Coro::State coro, SV *coderef)
2459 ALIAS:
2460 eval = 1
2461 CODE:
2462{
2463 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2464 {
2465 struct coro temp;
2466
2467 if (!(coro->flags & CF_RUNNING))
2468 {
2469 PUTBACK;
2470 save_perl (aTHX_ &temp);
2471 load_perl (aTHX_ coro);
2472 }
2473
2474 {
2475 dSP;
2476 ENTER;
2477 SAVETMPS;
2478 PUTBACK;
2479 PUSHSTACK;
2480 PUSHMARK (SP);
2481
2482 if (ix)
2483 eval_sv (coderef, 0);
2484 else
2485 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2486
2487 POPSTACK;
2488 SPAGAIN;
2489 FREETMPS;
2490 LEAVE;
2491 PUTBACK;
2492 }
2493
2494 if (!(coro->flags & CF_RUNNING))
2495 {
2496 save_perl (aTHX_ coro);
2497 load_perl (aTHX_ &temp);
2498 SPAGAIN;
2499 }
2500 }
2501}
2502
2503SV *
2504is_ready (Coro::State coro)
2505 PROTOTYPE: $
2506 ALIAS:
2507 is_ready = CF_READY
2508 is_running = CF_RUNNING
2509 is_new = CF_NEW
2510 is_destroyed = CF_DESTROYED
2511 CODE:
2512 RETVAL = boolSV (coro->flags & ix);
2513 OUTPUT:
2514 RETVAL
2515
2516void
2517throw (Coro::State self, SV *throw = &PL_sv_undef)
2518 PROTOTYPE: $;$
2519 CODE:
2520{
2521 struct coro *current = SvSTATE_current;
2522 SV **throwp = self == current ? &CORO_THROW : &self->except;
2523 SvREFCNT_dec (*throwp);
2524 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2525}
2526
2527void
2528api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2529 PROTOTYPE: $;$
2530 C_ARGS: aTHX_ coro, flags
2531
2532SV *
2533has_cctx (Coro::State coro)
2534 PROTOTYPE: $
2535 CODE:
2536 RETVAL = boolSV (!!coro->cctx);
2537 OUTPUT:
2538 RETVAL
2539
2540int
2541is_traced (Coro::State coro)
2542 PROTOTYPE: $
2543 CODE:
2544 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2545 OUTPUT:
2546 RETVAL
2547
2548UV
2549rss (Coro::State coro)
2550 PROTOTYPE: $
2551 ALIAS:
2552 usecount = 1
2553 CODE:
2554 switch (ix)
2555 {
2556 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2557 case 1: RETVAL = coro->usecount; break;
2558 }
2559 OUTPUT:
2560 RETVAL
2561
2562void
2563force_cctx ()
2564 PROTOTYPE:
2565 CODE:
2566 SvSTATE_current->cctx->idle_sp = 0;
2567
2568void
2569swap_defsv (Coro::State self)
2570 PROTOTYPE: $
2571 ALIAS:
2572 swap_defav = 1
2573 CODE:
2574 if (!self->slot)
2575 croak ("cannot swap state with coroutine that has no saved state,");
2576 else
2577 {
2578 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2579 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2580
2581 SV *tmp = *src; *src = *dst; *dst = tmp;
2582 }
2583
2584
1129MODULE = Coro::State PACKAGE = Coro 2585MODULE = Coro::State PACKAGE = Coro
1130 2586
1131BOOT: 2587BOOT:
1132{ 2588{
1133 int i; 2589 int i;
1134 2590
2591 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2592 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2593 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2594
2595 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2596 SvREADONLY_on (coro_current);
2597
1135 coro_stash = gv_stashpv ("Coro", TRUE); 2598 coro_stash = gv_stashpv ("Coro", TRUE);
1136 2599
1137 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2600 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1138 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2601 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1139 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2602 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2603 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2604 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2605 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143 2606
1144 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2607 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148 coro_ready[i] = newAV (); 2608 coro_ready[i] = newAV ();
1149 2609
1150 { 2610 {
1151 SV *sv = perl_get_sv("Coro::API", 1); 2611 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1152 2612
1153 coroapi.schedule = api_schedule; 2613 coroapi.schedule = api_schedule;
1154 coroapi.cede = api_cede; 2614 coroapi.cede = api_cede;
2615 coroapi.cede_notself = api_cede_notself;
1155 coroapi.ready = api_ready; 2616 coroapi.ready = api_ready;
2617 coroapi.is_ready = api_is_ready;
1156 coroapi.nready = &coro_nready; 2618 coroapi.nready = coro_nready;
1157 coroapi.current = coro_current; 2619 coroapi.current = coro_current;
1158 2620
1159 GCoroAPI = &coroapi; 2621 /*GCoroAPI = &coroapi;*/
1160 sv_setiv (sv, (IV)&coroapi); 2622 sv_setiv (sv, (IV)&coroapi);
1161 SvREADONLY_on (sv); 2623 SvREADONLY_on (sv);
1162 } 2624 }
1163} 2625}
1164 2626
2627void
2628schedule (...)
2629 CODE:
2630 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2631
2632void
2633cede (...)
2634 CODE:
2635 CORO_EXECUTE_SLF_XS (slf_init_cede);
2636
2637void
2638cede_notself (...)
2639 CODE:
2640 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2641
2642void
2643_set_current (SV *current)
2644 PROTOTYPE: $
2645 CODE:
2646 SvREFCNT_dec (SvRV (coro_current));
2647 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2648
2649void
2650_set_readyhook (SV *hook)
2651 PROTOTYPE: $
2652 CODE:
2653 SvREFCNT_dec (coro_readyhook);
2654 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2655
1165int 2656int
1166prio (Coro::State coro, int newprio = 0) 2657prio (Coro::State coro, int newprio = 0)
2658 PROTOTYPE: $;$
1167 ALIAS: 2659 ALIAS:
1168 nice = 1 2660 nice = 1
1169 CODE: 2661 CODE:
1170{ 2662{
1171 RETVAL = coro->prio; 2663 RETVAL = coro->prio;
1172 2664
1173 if (items > 1) 2665 if (items > 1)
1174 { 2666 {
1175 if (ix) 2667 if (ix)
1176 newprio += coro->prio; 2668 newprio = coro->prio - newprio;
1177 2669
1178 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2670 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2671 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180 2672
1181 coro->prio = newprio; 2673 coro->prio = newprio;
1182 } 2674 }
1183} 2675}
2676 OUTPUT:
2677 RETVAL
1184 2678
1185void 2679SV *
1186ready (SV *self) 2680ready (SV *self)
1187 PROTOTYPE: $ 2681 PROTOTYPE: $
1188 CODE: 2682 CODE:
1189 api_ready (self); 2683 RETVAL = boolSV (api_ready (aTHX_ self));
2684 OUTPUT:
2685 RETVAL
1190 2686
1191int 2687int
1192nready (...) 2688nready (...)
1193 PROTOTYPE: 2689 PROTOTYPE:
1194 CODE: 2690 CODE:
1195 RETVAL = coro_nready; 2691 RETVAL = coro_nready;
1196 OUTPUT: 2692 OUTPUT:
1197 RETVAL 2693 RETVAL
1198 2694
2695# for async_pool speedup
2696void
2697_pool_1 (SV *cb)
2698 CODE:
2699{
2700 HV *hv = (HV *)SvRV (coro_current);
2701 struct coro *coro = SvSTATE_hv ((SV *)hv);
2702 AV *defav = GvAV (PL_defgv);
2703 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2704 AV *invoke_av;
2705 int i, len;
2706
2707 if (!invoke)
2708 {
2709 SV *old = PL_diehook;
2710 PL_diehook = 0;
2711 SvREFCNT_dec (old);
2712 croak ("\3async_pool terminate\2\n");
2713 }
2714
2715 SvREFCNT_dec (coro->saved_deffh);
2716 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2717
2718 hv_store (hv, "desc", sizeof ("desc") - 1,
2719 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2720
2721 invoke_av = (AV *)SvRV (invoke);
2722 len = av_len (invoke_av);
2723
2724 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2725
2726 if (len > 0)
2727 {
2728 av_fill (defav, len - 1);
2729 for (i = 0; i < len; ++i)
2730 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2731 }
2732}
2733
2734void
2735_pool_2 (SV *cb)
2736 CODE:
2737{
2738 HV *hv = (HV *)SvRV (coro_current);
2739 struct coro *coro = SvSTATE_hv ((SV *)hv);
2740
2741 sv_setsv (cb, &PL_sv_undef);
2742
2743 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2744 coro->saved_deffh = 0;
2745
2746 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2747 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2748 {
2749 SV *old = PL_diehook;
2750 PL_diehook = 0;
2751 SvREFCNT_dec (old);
2752 croak ("\3async_pool terminate\2\n");
2753 }
2754
2755 av_clear (GvAV (PL_defgv));
2756 hv_store (hv, "desc", sizeof ("desc") - 1,
2757 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2758
2759 coro->prio = 0;
2760
2761 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2762 api_trace (aTHX_ coro_current, 0);
2763
2764 av_push (av_async_pool, newSVsv (coro_current));
2765}
2766
2767
2768MODULE = Coro::State PACKAGE = PerlIO::cede
2769
2770BOOT:
2771 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2772
2773
1199MODULE = Coro::State PACKAGE = Coro::AIO 2774MODULE = Coro::State PACKAGE = Coro::Semaphore
1200 2775
1201SV * 2776SV *
1202_get_state () 2777new (SV *klass, SV *count_ = 0)
1203 CODE: 2778 CODE:
1204{ 2779{
1205 struct { 2780 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1206 int errorno; 2781 AV *av = newAV ();
1207 int laststype; 2782 SV **ary;
1208 int laststatval;
1209 Stat_t statcache;
1210 } data;
1211 2783
1212 data.errorno = errno; 2784 /* unfortunately, building manually saves memory */
1213 data.laststype = PL_laststype; 2785 Newx (ary, 2, SV *);
1214 data.laststatval = PL_laststatval; 2786 AvALLOC (av) = ary;
1215 data.statcache = PL_statcache; 2787 AvARRAY (av) = ary;
2788 AvMAX (av) = 1;
2789 AvFILLp (av) = 0;
2790 ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
1216 2791
1217 RETVAL = newSVpvn ((char *)&data, sizeof data); 2792 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1218} 2793}
1219 OUTPUT: 2794 OUTPUT:
1220 RETVAL 2795 RETVAL
1221 2796
2797SV *
2798count (SV *self)
2799 CODE:
2800 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2801 OUTPUT:
2802 RETVAL
2803
1222void 2804void
1223_set_state (char *data_) 2805up (SV *self, int adjust = 1)
1224 PROTOTYPE: $ 2806 ALIAS:
2807 adjust = 1
2808 CODE:
2809 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2810
2811void
2812down (SV *self)
2813 CODE:
2814 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2815
2816void
2817try (SV *self)
2818 PPCODE:
2819{
2820 AV *av = (AV *)SvRV (self);
2821 SV *count_sv = AvARRAY (av)[0];
2822 IV count = SvIVX (count_sv);
2823
2824 if (count > 0)
2825 {
2826 --count;
2827 SvIVX (count_sv) = count;
2828 XSRETURN_YES;
2829 }
2830 else
2831 XSRETURN_NO;
2832}
2833
2834void
2835waiters (SV *self)
2836 CODE:
2837{
2838 AV *av = (AV *)SvRV (self);
2839
2840 if (GIMME_V == G_SCALAR)
2841 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2842 else
2843 {
2844 int i;
2845 EXTEND (SP, AvFILLp (av) + 1 - 1);
2846 for (i = 1; i <= AvFILLp (av); ++i)
2847 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2848 }
2849}
2850
2851
2852MODULE = Coro::State PACKAGE = Coro::AnyEvent
2853
2854BOOT:
2855 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2856
2857void
2858_schedule (...)
1225 CODE: 2859 CODE:
1226{ 2860{
1227 struct { 2861 static int incede;
1228 int errorno;
1229 int laststype;
1230 int laststatval;
1231 Stat_t statcache;
1232 } *data = (void *)data_;
1233 2862
1234 errno = data->errorno; 2863 api_cede_notself (aTHX);
1235 PL_laststype = data->laststype; 2864
1236 PL_laststatval = data->laststatval; 2865 ++incede;
1237 PL_statcache = data->statcache; 2866 while (coro_nready >= incede && api_cede (aTHX))
2867 ;
2868
2869 sv_setsv (sv_activity, &PL_sv_undef);
2870 if (coro_nready >= incede)
2871 {
2872 PUSHMARK (SP);
2873 PUTBACK;
2874 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2875 }
2876
2877 --incede;
1238} 2878}
2879
2880
2881MODULE = Coro::State PACKAGE = Coro::AIO
2882
2883void
2884_register (char *target, char *proto, SV *req)
2885 CODE:
2886{
2887 HV *st;
2888 GV *gvp;
2889 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2890 /* newXSproto doesn't return the CV on 5.8 */
2891 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2892 sv_setpv ((SV *)slf_cv, proto);
2893 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2894}
2895

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