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Comparing Coro/Coro/State.xs (file contents):
Revision 1.104 by root, Mon Nov 27 01:51:02 2006 UTC vs.
Revision 1.298 by root, Tue Nov 18 23:20:41 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8 12
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
9#if USE_VALGRIND 49#if CORO_USE_VALGRIND
10# include <valgrind/valgrind.h> 50# include <valgrind/valgrind.h>
11#endif 51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
12 55
13#define PERL_VERSION_ATLEAST(a,b,c) \ 56#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \ 57 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \ 58 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \ 59 && (PERL_VERSION > (b) \
… …
35# ifndef IS_PADCONST 78# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
37# endif 80# endif
38#endif 81#endif
39 82
40#include <stdio.h> 83/* 5.11 */
41#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
42 108
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44# undef STACKGUARD 110# undef CORO_STACKGUARD
45#endif
46
47#ifndef STACKGUARD
48# define STACKGUARD 0
49#endif
50
51#ifdef HAVE_MMAP
52# include <unistd.h>
53# include <sys/mman.h>
54# ifndef MAP_ANONYMOUS
55# ifdef MAP_ANON
56# define MAP_ANONYMOUS MAP_ANON
57# else
58# undef HAVE_MMAP
59# endif
60# endif 111#endif
61# include <limits.h> 112
62# ifndef PAGESIZE 113#ifndef CORO_STACKGUARD
63# define PAGESIZE pagesize 114# define CORO_STACKGUARD 0
64# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
65static long pagesize;
66# else
67# define BOOT_PAGESIZE
68# endif 115#endif
69#endif
70 116
71/* The next macro should declare a variable stacklevel that contains and approximation 117/* prefer perl internal functions over our own? */
72 * to the current C stack pointer. Its property is that it changes with each call 118#ifndef CORO_PREFER_PERL_FUNCTIONS
73 * and should be unique. */ 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
74#define dSTACKLEVEL int stacklevel 125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
128# define dSTACKLEVEL volatile void *stacklevel
75#define STACKLEVEL ((void *)&stacklevel) 129# define STACKLEVEL ((void *)&stacklevel)
130#endif
76 131
77#define IN_DESTRUCT (PL_main_cv == Nullcv) 132#define IN_DESTRUCT (PL_main_cv == Nullcv)
78 133
79#if __GNUC__ >= 3 134#if __GNUC__ >= 3
80# define attribute(x) __attribute__(x) 135# define attribute(x) __attribute__(x)
136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
81#else 138#else
82# define attribute(x) 139# define attribute(x)
140# define expect(expr,value) (expr)
141# define INLINE static
83#endif 142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
84 146
85#define NOINLINE attribute ((noinline)) 147#define NOINLINE attribute ((noinline))
86 148
87#include "CoroAPI.h" 149#include "CoroAPI.h"
88 150#define GCoroAPI (&coroapi) /* very sneaky */
89#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
90 151
91#ifdef USE_ITHREADS 152#ifdef USE_ITHREADS
92static perl_mutex coro_mutex; 153# if CORO_PTHREAD
93# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 154static void *coro_thx;
94# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
95#else
96# define LOCK (void)0
97# define UNLOCK (void)0
98#endif 155# endif
156#endif
99 157
158static double (*nvtime)(); /* so why doesn't it take void? */
159
160/* we hijack an hopefully unused CV flag for our purposes */
161#define CVf_SLF 0x4000
162static OP *pp_slf (pTHX);
163
164static U32 cctx_gen;
165static size_t cctx_stacksize = CORO_STACKSIZE;
100static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
101static 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;
102static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
103static 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};
104 197
105/* this is a structure representing a c-level coroutine */ 198/* this is a structure representing a c-level coroutine */
106typedef struct coro_stack { 199typedef struct coro_cctx
200{
107 struct coro_stack *next; 201 struct coro_cctx *next;
108 202
109 /* the stack */ 203 /* the stack */
110 void *sptr; 204 void *sptr;
111 long ssize; /* positive == mmap, otherwise malloc */ 205 size_t ssize;
112 206
113 /* cpu state */ 207 /* cpu state */
114 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 */
115 JMPENV *top_env; 210 JMPENV *top_env;
116 coro_context cctx; 211 coro_context cctx;
117 212
213 U32 gen;
118#if USE_VALGRIND 214#if CORO_USE_VALGRIND
119 int valgrind_id; 215 int valgrind_id;
120#endif 216#endif
121} coro_stack; 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))
122 240
123/* this is a structure representing a perl-level coroutine */ 241/* this is a structure representing a perl-level coroutine */
124struct coro { 242struct coro {
125 /* the c coroutine allocated to this perl coroutine, if any */ 243 /* the C coroutine allocated to this perl coroutine, if any */
126 coro_stack *stack; 244 coro_cctx *cctx;
127 245
128 /* data associated with this coroutine (initial args) */ 246 /* state data */
129 AV *args; 247 struct CoroSLF slf_frame; /* saved slf frame */
130 int refcnt;
131
132 /* optionally saved, might be zero */
133 AV *defav;
134 SV *defsv;
135 SV *errsv;
136
137 /* saved global state not related to stacks */
138 U8 dowarn;
139 I32 in_eval;
140
141 /* the stacks and related info (callchain etc..) */
142 PERL_SI *curstackinfo;
143 AV *curstack;
144 AV *mainstack; 248 AV *mainstack;
145 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
146 OP *op; 250
147 SV **curpad; 251 AV *args; /* data associated with this coroutine (initial args) */
148 AV *comppad; 252 int refcnt; /* coroutines are refcounted, yes */
149 CV *compcv; 253 int flags; /* CF_ flags */
150 SV **stack_base; 254 HV *hv; /* the perl hash associated with this coro, if any */
151 SV **stack_max; 255 void (*on_destroy)(pTHX_ struct coro *coro);
152 SV **tmps_stack; 256
153 I32 tmps_floor; 257 /* statistics */
154 I32 tmps_ix; 258 int usecount; /* number of transfers to this coro */
155 I32 tmps_max;
156 I32 *markstack;
157 I32 *markstack_ptr;
158 I32 *markstack_max;
159 I32 *scopestack;
160 I32 scopestack_ix;
161 I32 scopestack_max;
162 ANY *savestack;
163 I32 savestack_ix;
164 I32 savestack_max;
165 OP **retstack;
166 I32 retstack_ix;
167 I32 retstack_max;
168 PMOP *curpm;
169 COP *curcop;
170 259
171 /* coro process data */ 260 /* coro process data */
172 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;
173}; 269};
174 270
175typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
176typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
177 273
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
178static AV * 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
327static AV *
179coro_clone_padlist (CV *cv) 328coro_clone_padlist (pTHX_ CV *cv)
180{ 329{
181 AV *padlist = CvPADLIST (cv); 330 AV *padlist = CvPADLIST (cv);
182 AV *newpadlist, *newpad; 331 AV *newpadlist, *newpad;
183 332
184 newpadlist = newAV (); 333 newpadlist = newAV ();
185 AvREAL_off (newpadlist); 334 AvREAL_off (newpadlist);
186#if PERL_VERSION_ATLEAST (5,9,0) 335#if PERL_VERSION_ATLEAST (5,10,0)
187 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 336 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
188#else 337#else
189 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 338 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
190#endif 339#endif
191 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 340 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
192 --AvFILLp (padlist); 341 --AvFILLp (padlist);
193 342
194 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 343 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
195 av_store (newpadlist, 1, (SV *)newpad); 344 av_store (newpadlist, 1, (SV *)newpad);
196 345
197 return newpadlist; 346 return newpadlist;
198} 347}
199 348
200static void 349static void
201free_padlist (AV *padlist) 350free_padlist (pTHX_ AV *padlist)
202{ 351{
203 /* may be during global destruction */ 352 /* may be during global destruction */
204 if (SvREFCNT (padlist)) 353 if (SvREFCNT (padlist))
205 { 354 {
206 I32 i = AvFILLp (padlist); 355 I32 i = AvFILLp (padlist);
… …
227 AV *padlist; 376 AV *padlist;
228 AV *av = (AV *)mg->mg_obj; 377 AV *av = (AV *)mg->mg_obj;
229 378
230 /* casting is fun. */ 379 /* casting is fun. */
231 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 380 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
232 free_padlist (padlist); 381 free_padlist (aTHX_ padlist);
233 382
234 SvREFCNT_dec (av); 383 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
235 384
236 return 0; 385 return 0;
237} 386}
238 387
388#define CORO_MAGIC_type_cv 26
239#define PERL_MAGIC_coro PERL_MAGIC_ext 389#define CORO_MAGIC_type_state PERL_MAGIC_ext
240 390
241static 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))
242 438
243/* the next two functions merely cache the padlists */ 439/* the next two functions merely cache the padlists */
244static void 440static void
245get_padlist (CV *cv) 441get_padlist (pTHX_ CV *cv)
246{ 442{
247 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 443 MAGIC *mg = CORO_MAGIC_cv (cv);
444 AV *av;
248 445
249 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
250 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
251 else 448 else
252 { 449 {
253#if 0 450#if CORO_PREFER_PERL_FUNCTIONS
254 /* this is probably cleaner, but also slower? */ 451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
255 CV *cp = Perl_cv_clone (cv); 453 CV *cp = Perl_cv_clone (cv);
256 CvPADLIST (cv) = CvPADLIST (cp); 454 CvPADLIST (cv) = CvPADLIST (cp);
257 CvPADLIST (cp) = 0; 455 CvPADLIST (cp) = 0;
258 SvREFCNT_dec (cp); 456 SvREFCNT_dec (cp);
259#else 457#else
260 CvPADLIST (cv) = coro_clone_padlist (cv); 458 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
261#endif 459#endif
262 } 460 }
263} 461}
264 462
265static void 463static void
266put_padlist (CV *cv) 464put_padlist (pTHX_ CV *cv)
267{ 465{
268 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 466 MAGIC *mg = CORO_MAGIC_cv (cv);
467 AV *av;
269 468
270 if (!mg) 469 if (expect_false (!mg))
271 { 470 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
272 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
273 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
274 mg->mg_virtual = &vtbl_coro;
275 mg->mg_obj = (SV *)newAV ();
276 }
277 471
278 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 472 av = (AV *)mg->mg_obj;
279}
280 473
281#define SB do { 474 if (expect_false (AvFILLp (av) >= AvMAX (av)))
282#define SE } while (0) 475 av_extend (av, AvMAX (av) + 1);
283 476
284#define LOAD(state) load_state((state)); 477 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285#define SAVE(state,flags) save_state((state),(flags)); 478}
286 479
287#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 480/** load & save, init *******************************************************/
288 481
289static void 482static void
290load_state(Coro__State c) 483load_perl (pTHX_ Coro__State c)
291{ 484{
292 PL_dowarn = c->dowarn; 485 perl_slots *slot = c->slot;
293 PL_in_eval = c->in_eval; 486 c->slot = 0;
294 487
295 PL_curstackinfo = c->curstackinfo;
296 PL_curstack = c->curstack;
297 PL_mainstack = c->mainstack; 488 PL_mainstack = c->mainstack;
298 PL_stack_sp = c->stack_sp;
299 PL_op = c->op;
300 PL_curpad = c->curpad;
301 PL_comppad = c->comppad;
302 PL_compcv = c->compcv;
303 PL_stack_base = c->stack_base;
304 PL_stack_max = c->stack_max;
305 PL_tmps_stack = c->tmps_stack;
306 PL_tmps_floor = c->tmps_floor;
307 PL_tmps_ix = c->tmps_ix;
308 PL_tmps_max = c->tmps_max;
309 PL_markstack = c->markstack;
310 PL_markstack_ptr = c->markstack_ptr;
311 PL_markstack_max = c->markstack_max;
312 PL_scopestack = c->scopestack;
313 PL_scopestack_ix = c->scopestack_ix;
314 PL_scopestack_max = c->scopestack_max;
315 PL_savestack = c->savestack;
316 PL_savestack_ix = c->savestack_ix;
317 PL_savestack_max = c->savestack_max;
318#if !PERL_VERSION_ATLEAST (5,9,0)
319 PL_retstack = c->retstack;
320 PL_retstack_ix = c->retstack_ix;
321 PL_retstack_max = c->retstack_max;
322#endif
323 PL_curpm = c->curpm;
324 PL_curcop = c->curcop;
325 489
326 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 490 GvSV (PL_defgv) = slot->defsv;
327 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 491 GvAV (PL_defgv) = slot->defav;
328 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
329 498
330 { 499 {
331 dSP; 500 dSP;
501
332 CV *cv; 502 CV *cv;
333 503
334 /* now do the ugly restore mess */ 504 /* now do the ugly restore mess */
335 while ((cv = (CV *)POPs)) 505 while (expect_true (cv = (CV *)POPs))
336 { 506 {
337 AV *padlist = (AV *)POPs;
338
339 if (padlist)
340 {
341 put_padlist (cv); /* mark this padlist as available */ 507 put_padlist (aTHX_ cv); /* mark this padlist as available */
342 CvPADLIST(cv) = padlist; 508 CvDEPTH (cv) = PTR2IV (POPs);
343 } 509 CvPADLIST (cv) = (AV *)POPs;
344
345 ++CvDEPTH(cv);
346 } 510 }
347 511
348 PUTBACK; 512 PUTBACK;
349 } 513 }
350}
351 514
515 slf_frame = c->slf_frame;
516 CORO_THROW = c->except;
517}
518
352static void 519static void
353save_state(Coro__State c, int flags) 520save_perl (pTHX_ Coro__State c)
354{ 521{
522 c->except = CORO_THROW;
523 c->slf_frame = slf_frame;
524
355 { 525 {
356 dSP; 526 dSP;
357 I32 cxix = cxstack_ix; 527 I32 cxix = cxstack_ix;
358 PERL_CONTEXT *ccstk = cxstack; 528 PERL_CONTEXT *ccstk = cxstack;
359 PERL_SI *top_si = PL_curstackinfo; 529 PERL_SI *top_si = PL_curstackinfo;
… …
361 /* 531 /*
362 * 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
363 * (and reinitialize) all cv's in the whole callchain :( 533 * (and reinitialize) all cv's in the whole callchain :(
364 */ 534 */
365 535
366 PUSHs (Nullsv); 536 XPUSHs (Nullsv);
367 /* this loop was inspired by pp_caller */ 537 /* this loop was inspired by pp_caller */
368 for (;;) 538 for (;;)
369 { 539 {
370 while (cxix >= 0) 540 while (expect_true (cxix >= 0))
371 { 541 {
372 PERL_CONTEXT *cx = &ccstk[cxix--]; 542 PERL_CONTEXT *cx = &ccstk[cxix--];
373 543
374 if (CxTYPE(cx) == CXt_SUB) 544 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
375 { 545 {
376 CV *cv = cx->blk_sub.cv; 546 CV *cv = cx->blk_sub.cv;
547
377 if (CvDEPTH(cv)) 548 if (expect_true (CvDEPTH (cv)))
378 { 549 {
379 EXTEND (SP, CvDEPTH(cv)*2); 550 EXTEND (SP, 3);
380
381 while (--CvDEPTH(cv))
382 {
383 /* this tells the restore code to increment CvDEPTH */
384 PUSHs (Nullsv);
385 PUSHs ((SV *)cv);
386 }
387
388 PUSHs ((SV *)CvPADLIST(cv)); 551 PUSHs ((SV *)CvPADLIST (cv));
552 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
389 PUSHs ((SV *)cv); 553 PUSHs ((SV *)cv);
390 554
555 CvDEPTH (cv) = 0;
391 get_padlist (cv); 556 get_padlist (aTHX_ cv);
392 } 557 }
393 } 558 }
394#ifdef CXt_FORMAT
395 else if (CxTYPE(cx) == CXt_FORMAT)
396 {
397 /* I never used formats, so how should I know how these are implemented? */
398 /* my bold guess is as a simple, plain sub... */
399 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
400 }
401#endif
402 } 559 }
403 560
404 if (top_si->si_type == PERLSI_MAIN) 561 if (expect_true (top_si->si_type == PERLSI_MAIN))
405 break; 562 break;
406 563
407 top_si = top_si->si_prev; 564 top_si = top_si->si_prev;
408 ccstk = top_si->si_cxstack; 565 ccstk = top_si->si_cxstack;
409 cxix = top_si->si_cxix; 566 cxix = top_si->si_cxix;
410 } 567 }
411 568
412 PUTBACK; 569 PUTBACK;
413 } 570 }
414 571
415 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 572 /* allocate some space on the context stack for our purposes */
416 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 573 /* we manually unroll here, as usually 2 slots is enough */
417 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 */
418 583
419 c->dowarn = PL_dowarn;
420 c->in_eval = PL_in_eval;
421
422 c->curstackinfo = PL_curstackinfo;
423 c->curstack = PL_curstack;
424 c->mainstack = PL_mainstack; 584 c->mainstack = PL_mainstack;
425 c->stack_sp = PL_stack_sp; 585
426 c->op = PL_op; 586 {
427 c->curpad = PL_curpad; 587 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
428 c->comppad = PL_comppad; 588
429 c->compcv = PL_compcv; 589 slot->defav = GvAV (PL_defgv);
430 c->stack_base = PL_stack_base; 590 slot->defsv = DEFSV;
431 c->stack_max = PL_stack_max; 591 slot->errsv = ERRSV;
432 c->tmps_stack = PL_tmps_stack; 592 slot->irsgv = GvSV (irsgv);
433 c->tmps_floor = PL_tmps_floor; 593
434 c->tmps_ix = PL_tmps_ix; 594 #define VAR(name,type) slot->name = PL_ ## name;
435 c->tmps_max = PL_tmps_max; 595 # include "state.h"
436 c->markstack = PL_markstack; 596 #undef VAR
437 c->markstack_ptr = PL_markstack_ptr; 597 }
438 c->markstack_max = PL_markstack_max;
439 c->scopestack = PL_scopestack;
440 c->scopestack_ix = PL_scopestack_ix;
441 c->scopestack_max = PL_scopestack_max;
442 c->savestack = PL_savestack;
443 c->savestack_ix = PL_savestack_ix;
444 c->savestack_max = PL_savestack_max;
445#if !PERL_VERSION_ATLEAST (5,9,0)
446 c->retstack = PL_retstack;
447 c->retstack_ix = PL_retstack_ix;
448 c->retstack_max = PL_retstack_max;
449#endif
450 c->curpm = PL_curpm;
451 c->curcop = PL_curcop;
452} 598}
453 599
454/* 600/*
455 * allocate various perl stacks. This is an exact copy 601 * allocate various perl stacks. This is almost an exact copy
456 * of perl.c:init_stacks, except that it uses less memory 602 * of perl.c:init_stacks, except that it uses less memory
457 * on the (sometimes correct) assumption that coroutines do 603 * on the (sometimes correct) assumption that coroutines do
458 * not usually need a lot of stackspace. 604 * not usually need a lot of stackspace.
459 */ 605 */
606#if CORO_PREFER_PERL_FUNCTIONS
607# define coro_init_stacks init_stacks
608#else
460static void 609static void
461coro_init_stacks () 610coro_init_stacks (pTHX)
462{ 611{
463 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 612 PL_curstackinfo = new_stackinfo(32, 8);
464 PL_curstackinfo->si_type = PERLSI_MAIN; 613 PL_curstackinfo->si_type = PERLSI_MAIN;
465 PL_curstack = PL_curstackinfo->si_stack; 614 PL_curstack = PL_curstackinfo->si_stack;
466 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 615 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467 616
468 PL_stack_base = AvARRAY(PL_curstack); 617 PL_stack_base = AvARRAY(PL_curstack);
469 PL_stack_sp = PL_stack_base; 618 PL_stack_sp = PL_stack_base;
470 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 619 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471 620
472 New(50,PL_tmps_stack,96,SV*); 621 New(50,PL_tmps_stack,32,SV*);
473 PL_tmps_floor = -1; 622 PL_tmps_floor = -1;
474 PL_tmps_ix = -1; 623 PL_tmps_ix = -1;
475 PL_tmps_max = 96; 624 PL_tmps_max = 32;
476 625
477 New(54,PL_markstack,16,I32); 626 New(54,PL_markstack,16,I32);
478 PL_markstack_ptr = PL_markstack; 627 PL_markstack_ptr = PL_markstack;
479 PL_markstack_max = PL_markstack + 16; 628 PL_markstack_max = PL_markstack + 16;
480 629
481#ifdef SET_MARK_OFFSET 630#ifdef SET_MARK_OFFSET
482 SET_MARK_OFFSET; 631 SET_MARK_OFFSET;
483#endif 632#endif
484 633
485 New(54,PL_scopestack,16,I32); 634 New(54,PL_scopestack,8,I32);
486 PL_scopestack_ix = 0; 635 PL_scopestack_ix = 0;
487 PL_scopestack_max = 16; 636 PL_scopestack_max = 8;
488 637
489 New(54,PL_savestack,96,ANY); 638 New(54,PL_savestack,24,ANY);
490 PL_savestack_ix = 0; 639 PL_savestack_ix = 0;
491 PL_savestack_max = 96; 640 PL_savestack_max = 24;
492 641
493#if !PERL_VERSION_ATLEAST (5,9,0) 642#if !PERL_VERSION_ATLEAST (5,10,0)
494 New(54,PL_retstack,8,OP*); 643 New(54,PL_retstack,4,OP*);
495 PL_retstack_ix = 0; 644 PL_retstack_ix = 0;
496 PL_retstack_max = 8; 645 PL_retstack_max = 4;
497#endif 646#endif
498} 647}
648#endif
499 649
500/* 650/*
501 * destroy the stacks, the callchain etc... 651 * destroy the stacks, the callchain etc...
502 */ 652 */
503static void 653static void
504coro_destroy_stacks() 654coro_destruct_stacks (pTHX)
505{ 655{
506 if (!IN_DESTRUCT)
507 {
508 /* is this ugly, I ask? */
509 LEAVE_SCOPE (0);
510
511 /* sure it is, but more important: is it correct?? :/ */
512 FREETMPS;
513
514 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
515 }
516
517 while (PL_curstackinfo->si_next) 656 while (PL_curstackinfo->si_next)
518 PL_curstackinfo = PL_curstackinfo->si_next; 657 PL_curstackinfo = PL_curstackinfo->si_next;
519 658
520 while (PL_curstackinfo) 659 while (PL_curstackinfo)
521 { 660 {
522 PERL_SI *p = PL_curstackinfo->si_prev; 661 PERL_SI *p = PL_curstackinfo->si_prev;
523 662
524 { /*D*//*remove*/
525 dSP;
526 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527 PUTBACK; /* possibly superfluous */
528 }
529
530 if (!IN_DESTRUCT) 663 if (!IN_DESTRUCT)
531 {
532 dounwind (-1);/*D*//*remove*/
533 SvREFCNT_dec (PL_curstackinfo->si_stack); 664 SvREFCNT_dec (PL_curstackinfo->si_stack);
534 }
535 665
536 Safefree (PL_curstackinfo->si_cxstack); 666 Safefree (PL_curstackinfo->si_cxstack);
537 Safefree (PL_curstackinfo); 667 Safefree (PL_curstackinfo);
538 PL_curstackinfo = p; 668 PL_curstackinfo = p;
539 } 669 }
540 670
541 Safefree (PL_tmps_stack); 671 Safefree (PL_tmps_stack);
542 Safefree (PL_markstack); 672 Safefree (PL_markstack);
543 Safefree (PL_scopestack); 673 Safefree (PL_scopestack);
544 Safefree (PL_savestack); 674 Safefree (PL_savestack);
545#if !PERL_VERSION_ATLEAST (5,9,0) 675#if !PERL_VERSION_ATLEAST (5,10,0)
546 Safefree (PL_retstack); 676 Safefree (PL_retstack);
547#endif 677#endif
548} 678}
549 679
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 */
550static void 742static int
551setup_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)
552{ 829{
553 /* 830 /*
554 * emulate part of the perl startup here. 831 * emulate part of the perl startup here.
555 */ 832 */
556
557 coro_init_stacks (); 833 coro_init_stacks (aTHX);
558 834
835 PL_runops = RUNOPS_DEFAULT;
836 PL_curcop = &PL_compiling;
837 PL_in_eval = EVAL_NULL;
559 PL_curcop = 0; 838 PL_comppad = 0;
560 PL_in_eval = 0;
561 PL_curpm = 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);
562 858
563 { 859 {
564 dSP; 860 dSP;
565 LOGOP myop; 861 UNOP myop;
566 862
567 /* I have no idea why this is needed, but it is */ 863 Zero (&myop, 1, UNOP);
864 myop.op_next = Nullop;
865 myop.op_flags = OPf_WANT_VOID;
866
568 PUSHMARK (SP); 867 PUSHMARK (SP);
569 868 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
570 SvREFCNT_dec (GvAV (PL_defgv)); 869 PUTBACK;
571 GvAV (PL_defgv) = coro->args; coro->args = 0;
572
573 Zero (&myop, 1, LOGOP);
574 myop.op_next = Nullop;
575 myop.op_flags = OPf_WANT_VOID;
576
577 PL_op = (OP *)&myop; 870 PL_op = (OP *)&myop;
578
579 PUSHMARK (SP);
580 XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
581 PUTBACK;
582 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 871 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
583 SPAGAIN; 872 SPAGAIN;
584
585 ENTER; /* necessary e.g. for dounwind */
586 } 873 }
587}
588 874
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
589static void 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));
914 SvREFCNT_dec (GvAV (PL_defgv));
915 SvREFCNT_dec (GvSV (PL_errgv));
916 SvREFCNT_dec (PL_defoutgv);
917 SvREFCNT_dec (PL_rs);
918 SvREFCNT_dec (GvSV (irsgv));
919
920 SvREFCNT_dec (PL_diehook);
921 SvREFCNT_dec (PL_warnhook);
922
923 SvREFCNT_dec (coro->saved_deffh);
924 SvREFCNT_dec (CORO_THROW);
925
926 coro_destruct_stacks (aTHX);
927}
928
929INLINE void
590free_coro_mortal () 930free_coro_mortal (pTHX)
591{ 931{
592 if (coro_mortal) 932 if (expect_true (coro_mortal))
593 { 933 {
594 SvREFCNT_dec (coro_mortal); 934 SvREFCNT_dec (coro_mortal);
595 coro_mortal = 0; 935 coro_mortal = 0;
596 } 936 }
597} 937}
598 938
939static int
940runops_trace (pTHX)
941{
942 COP *oldcop = 0;
943 int oldcxix = -2;
944 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
945 coro_cctx *cctx = coro->cctx;
946
947 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
948 {
949 PERL_ASYNC_CHECK ();
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 */
599static void NOINLINE 1082static void NOINLINE
600prepare_cctx (coro_stack *cctx) 1083cctx_prepare (pTHX_ coro_cctx *cctx)
601{ 1084{
602 dSP;
603 LOGOP myop;
604
605 Zero (&myop, 1, LOGOP);
606 myop.op_next = PL_op;
607 myop.op_flags = OPf_WANT_VOID;
608
609 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
610
611 PUSHMARK (SP);
612 XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
613 PUTBACK;
614 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
615 SPAGAIN;
616}
617
618static void
619coro_run (void *arg)
620{
621 /* coro_run is the alternative epilogue of transfer() */
622 UNLOCK;
623
624 /*
625 * this is a _very_ stripped down perl interpreter ;)
626 */
627 PL_top_env = &PL_start_env; 1085 PL_top_env = &PL_start_env;
1086
1087 if (cctx->flags & CC_TRACE)
1088 PL_runops = runops_trace;
1089
1090 /* we already must be executing an SLF op, there is no other valid way
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));
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
628 /* inject call to cctx_init */ 1128 /* inject a fake subroutine call to cctx_init */
629 prepare_cctx ((coro_stack *)arg); 1129 cctx_prepare (aTHX_ (coro_cctx *)arg);
630 1130
1131 /* cctx_run is the alternative tail of transfer() */
1132 transfer_tail (aTHX);
1133
631 /* 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 */
1135 PL_restartop = PL_op;
632 perl_run (PL_curinterp); 1136 perl_run (PL_curinterp);
633 1137
634 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1138 /*
635 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 }
636} 1148}
637 1149
638static coro_stack * 1150static coro_cctx *
639stack_new () 1151cctx_new ()
640{ 1152{
641 coro_stack *stack; 1153 coro_cctx *cctx;
642 1154
1155 ++cctx_count;
643 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;
644 1184
645#if HAVE_MMAP 1185#if HAVE_MMAP
646
647 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1186 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
648 /* mmap suppsedly does allocate-on-write for us */ 1187 /* mmap supposedly does allocate-on-write for us */
649 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);
650 1189
651 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;
652 { 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 {
653 perror ("FATAL: unable to mmap stack for coroutine"); 1207 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
654 _exit (EXIT_FAILURE); 1208 _exit (EXIT_FAILURE);
655 } 1209 }
656 1210
657# if STACKGUARD 1211 stack_start = cctx->sptr;
658 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1212 stack_size = cctx->ssize;
659# endif
660
661#else
662
663 stack->ssize = STACKSIZE * (long)sizeof (long);
664 New (0, stack->sptr, STACKSIZE, long);
665
666 if (!stack->sptr)
667 { 1213 }
668 perror (stderr, "FATAL: unable to malloc stack for coroutine");
669 _exit (EXIT_FAILURE);
670 }
671 1214
1215 #if CORO_USE_VALGRIND
1216 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
672#endif 1217 #endif
673 1218
674#if USE_VALGRIND 1219 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
675 stack->valgrind_id = VALGRIND_STACK_REGISTER (
676 STACKGUARD * PAGESIZE + (char *)stack->sptr,
677 stack->ssize + (char *)stack->sptr
678 );
679#endif
680 1220
681 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
682
683 return stack; 1221 return cctx;
684} 1222}
685 1223
686static void 1224static void
687stack_free (coro_stack *stack) 1225cctx_destroy (coro_cctx *cctx)
688{ 1226{
689 if (!stack) 1227 if (!cctx)
690 return; 1228 return;
691 1229
692#if USE_VALGRIND 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
693 VALGRIND_STACK_DEREGISTER (stack->valgrind_id); 1237 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
694#endif 1238 #endif
695 1239
696#if HAVE_MMAP 1240#if HAVE_MMAP
697 munmap (stack->sptr, stack->ssize); 1241 if (cctx->flags & CC_MAPPED)
698#else 1242 munmap (cctx->sptr, cctx->ssize);
1243 else
1244#endif
699 Safefree (stack->sptr); 1245 Safefree (cctx->sptr);
700#endif 1246 }
701 1247
702 Safefree (stack); 1248 Safefree (cctx);
703} 1249}
704 1250
705static coro_stack *stack_first; 1251/* wether this cctx should be destructed */
706static int cctx_count, cctx_idle; 1252#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
707 1253
708static coro_stack * 1254static coro_cctx *
709stack_get () 1255cctx_get (pTHX)
710{ 1256{
711 coro_stack *stack; 1257 while (expect_true (cctx_first))
712
713 if (stack_first)
714 { 1258 {
1259 coro_cctx *cctx = cctx_first;
1260 cctx_first = cctx->next;
715 --cctx_idle; 1261 --cctx_idle;
716 stack = stack_first; 1262
717 stack_first = stack->next; 1263 if (expect_true (!CCTX_EXPIRED (cctx)))
718 } 1264 return cctx;
719 else 1265
720 { 1266 cctx_destroy (cctx);
721 ++cctx_count;
722 stack = stack_new ();
723 PL_op = PL_op->op_next;
724 } 1267 }
725 1268
726 return stack; 1269 return cctx_new_run ();
727} 1270}
728 1271
729static void 1272static void
730stack_put (coro_stack *stack) 1273cctx_put (coro_cctx *cctx)
731{ 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
732 ++cctx_idle; 1287 ++cctx_idle;
733 stack->next = stack_first; 1288 cctx->next = cctx_first;
734 stack_first = stack; 1289 cctx_first = cctx;
735} 1290}
736 1291
737/* never call directly, always through the coro_state_transfer global variable */ 1292/** coroutine switching *****************************************************/
738static void NOINLINE 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 */
739transfer (struct coro *prev, struct coro *next, int flags) 1319transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
740{ 1320{
741 dSTACKLEVEL; 1321 dSTACKLEVEL;
742 1322
743 /* sometimes transfer is only called to set idle_sp */ 1323 /* sometimes transfer is only called to set idle_sp */
744 if (flags == TRANSFER_SET_STACKLEVEL) 1324 if (expect_false (!next))
1325 {
745 ((coro_stack *)prev)->idle_sp = STACKLEVEL; 1326 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
746 else if (prev != next) 1327 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747 { 1328 }
1329 else if (expect_true (prev != next))
1330 {
748 coro_stack *prev__stack; 1331 coro_cctx *prev__cctx;
749 1332
750 LOCK; 1333 if (expect_false (prev->flags & CF_NEW))
751
752 if (next->mainstack)
753 { 1334 {
754 /* coroutine already started */ 1335 /* create a new empty/source context */
755 SAVE (prev, flags); 1336 prev->cctx = cctx_new_empty ();
756 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);
757 } 1353 }
758 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 ))
759 { 1365 {
760 /* need to start coroutine */ 1366 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
761 /* 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));
762 SAVE (prev, -1); 1368
763 /* setup coroutine call */ 1369 prev->cctx = 0;
764 setup_coro (next); 1370
765 /* 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 */
766 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);
767 } 1378 }
768 1379
769 if (!prev->stack) 1380 ++next->usecount;
770 /* create a new empty context */
771 Newz (0, prev->stack, 1, coro_stack);
772 1381
773 prev__stack = prev->stack; 1382 if (expect_true (!next->cctx))
1383 next->cctx = cctx_get (aTHX);
774 1384
775 /* possibly "free" the stack */ 1385 if (expect_false (prev__cctx != next->cctx))
776 if (prev__stack->idle_sp == STACKLEVEL)
777 { 1386 {
778 stack_put (prev__stack); 1387 prev__cctx->top_env = PL_top_env;
779 prev->stack = 0; 1388 PL_top_env = next->cctx->top_env;
1389 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
780 } 1390 }
781 1391
782 if (!next->stack) 1392 transfer_tail (aTHX);
783 next->stack = stack_get ();
784
785 if (prev__stack != next->stack)
786 {
787 prev__stack->top_env = PL_top_env;
788 PL_top_env = next->stack->top_env;
789 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
790 }
791
792 free_coro_mortal ();
793
794 UNLOCK;
795 } 1393 }
796} 1394}
797 1395
798struct transfer_args 1396#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
799{
800 struct coro *prev, *next;
801 int flags;
802};
803
804#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1397#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
805 1398
1399/** high level stuff ********************************************************/
1400
806static void 1401static int
807coro_state_destroy (struct coro *coro) 1402coro_state_destroy (pTHX_ struct coro *coro)
808{ 1403{
809 if (coro->refcnt--) 1404 if (coro->flags & CF_DESTROYED)
810 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 */
811 1420
812 if (coro->mainstack && coro->mainstack != main_mainstack) 1421 if (coro->mainstack && coro->mainstack != main_mainstack)
813 { 1422 {
814 struct coro temp; 1423 struct coro temp;
815 1424
816 SAVE ((&temp), TRANSFER_SAVE_ALL); 1425 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
817 LOAD (coro);
818 1426
819 coro_destroy_stacks (); 1427 save_perl (aTHX_ &temp);
1428 load_perl (aTHX_ coro);
820 1429
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1430 coro_destruct (aTHX_ coro);
822 1431
1432 load_perl (aTHX_ &temp);
1433
823 coro->mainstack = 0; 1434 coro->slot = 0;
824 } 1435 }
825 1436
826 stack_free (coro->stack); 1437 cctx_destroy (coro->cctx);
827 SvREFCNT_dec (coro->args); 1438 SvREFCNT_dec (coro->args);
828 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;
829} 1445}
830 1446
831static int 1447static int
832coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1448coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833{ 1449{
834 struct coro *coro = (struct coro *)mg->mg_ptr; 1450 struct coro *coro = (struct coro *)mg->mg_ptr;
835 mg->mg_ptr = 0; 1451 mg->mg_ptr = 0;
836 1452
1453 coro->hv = 0;
1454
1455 if (--coro->refcnt < 0)
1456 {
837 coro_state_destroy (coro); 1457 coro_state_destroy (aTHX_ coro);
1458 Safefree (coro);
1459 }
838 1460
839 return 0; 1461 return 0;
840} 1462}
841 1463
842static int 1464static int
… …
849 return 0; 1471 return 0;
850} 1472}
851 1473
852static MGVTBL coro_state_vtbl = { 1474static MGVTBL coro_state_vtbl = {
853 0, 0, 0, 0, 1475 0, 0, 0, 0,
854 coro_state_clear, 1476 coro_state_free,
855 0, 1477 0,
856#ifdef MGf_DUP 1478#ifdef MGf_DUP
857 coro_state_dup, 1479 coro_state_dup,
858#else 1480#else
859# define MGf_DUP 0 1481# define MGf_DUP 0
860#endif 1482#endif
861}; 1483};
862 1484
863static struct coro *
864SvSTATE (SV *coro)
865{
866 HV *stash;
867 MAGIC *mg;
868
869 if (SvROK (coro))
870 coro = SvRV (coro);
871
872 stash = SvSTASH (coro);
873 if (stash != coro_stash && stash != coro_state_stash)
874 {
875 /* very slow, but rare, check */
876 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
877 croak ("Coro::State object required");
878 }
879
880 mg = SvMAGIC (coro);
881 assert (mg->mg_type == PERL_MAGIC_ext);
882 return (struct coro *)mg->mg_ptr;
883}
884
885static void 1485static void
886prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1486prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
887{ 1487{
888 ta->prev = SvSTATE (prev); 1488 ta->prev = SvSTATE (prev_sv);
889 ta->next = SvSTATE (next); 1489 ta->next = SvSTATE (next_sv);
890 ta->flags = flags; 1490 TRANSFER_CHECK (*ta);
891} 1491}
892 1492
893static void 1493static void
894api_transfer (SV *prev, SV *next, int flags) 1494api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
895{ 1495{
896 dTHX;
897 struct transfer_args ta; 1496 struct coro_transfer_args ta;
898 1497
899 prepare_transfer (&ta, prev, next, flags); 1498 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
900 TRANSFER (ta); 1499 TRANSFER (ta, 1);
901} 1500}
902 1501
903/** Coro ********************************************************************/ 1502/** Coro ********************************************************************/
904 1503
905#define PRIO_MAX 3 1504INLINE void
906#define PRIO_HIGH 1 1505coro_enq (pTHX_ struct coro *coro)
907#define PRIO_NORMAL 0 1506{
908#define PRIO_LOW -1 1507 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
909#define PRIO_IDLE -3 1508}
910#define PRIO_MIN -4
911 1509
912/* for Coro.pm */ 1510INLINE SV *
913static GV *coro_current, *coro_idle; 1511coro_deq (pTHX)
914static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
915static int coro_nready;
916
917static void
918coro_enq (SV *sv)
919{ 1512{
920 int prio; 1513 int prio;
921 1514
922 if (SvTYPE (sv) != SVt_PVHV) 1515 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
923 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]);
924 1518
925 prio = SvSTATE (sv)->prio; 1519 return 0;
1520}
926 1521
927 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);
928 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);
929} 1942}
930 1943
931static SV * 1944static SV *
932coro_deq (int min_prio) 1945PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
933{ 1946{
934 int prio = PRIO_MAX - PRIO_MIN; 1947 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
935 1948
936 min_prio -= PRIO_MIN; 1949 return newSVnv (self->every);
937 if (min_prio < 0) 1950}
938 min_prio = 0;
939 1951
940 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1952static IV
941 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)
942 { 1959 {
943 coro_nready--; 1960 api_cede (aTHX);
944 return av_shift (coro_ready [prio]); 1961 self->next = now + self->every;
945 } 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_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
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
2052 if (acquire)
2053 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2054 else
2055 coro_semaphore_adjust (aTHX_ av, 0);
2056
2057 return 0;
2058 }
2059 else
2060 {
2061 int i;
2062 /* if we were woken up but can't down, we look through the whole */
2063 /* waiters list and only add us if we aren't in there already */
2064 /* this avoids some degenerate memory usage cases */
2065
2066 for (i = 1; i <= AvFILLp (av); ++i)
2067 if (AvARRAY (av)[i] == SvRV (coro_current))
2068 return 1;
2069
2070 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2071 return 1;
2072 }
2073}
2074
2075static int
2076slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2077{
2078 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2079}
2080
2081static int
2082slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2083{
2084 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2085}
2086
2087static void
2088slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2089{
2090 AV *av = (AV *)SvRV (arg [0]);
2091
2092 if (SvIVX (AvARRAY (av)[0]) > 0)
2093 {
2094 frame->data = (void *)av;
2095 frame->prepare = prepare_nop;
2096 }
2097 else
2098 {
2099 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2100
2101 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2102 frame->prepare = prepare_schedule;
2103
2104 /* to avoid race conditions when a woken-up coro gets terminated */
2105 /* we arrange for a temporary on_destroy that calls adjust (0) */
2106 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2107 }
2108}
2109
2110static void
2111slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2112{
2113 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2114 frame->check = slf_check_semaphore_down;
2115}
2116
2117static void
2118slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2119{
2120 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2121 frame->check = slf_check_semaphore_wait;
2122}
2123
2124/*****************************************************************************/
2125/* gensub: simple closure generation utility */
2126
2127#define GENSUB_ARG CvXSUBANY (cv).any_ptr
2128
2129/* create a closure from XS, returns a code reference */
2130/* the arg can be accessed via GENSUB_ARG from the callback */
2131/* the callback must use dXSARGS/XSRETURN */
2132static SV *
2133gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
2134{
2135 CV *cv = (CV *)newSV (0);
2136
2137 sv_upgrade ((SV *)cv, SVt_PVCV);
2138
2139 CvANON_on (cv);
2140 CvISXSUB_on (cv);
2141 CvXSUB (cv) = xsub;
2142 GENSUB_ARG = arg;
2143
2144 return newRV_noinc ((SV *)cv);
2145}
2146
2147/*****************************************************************************/
2148/* Coro::AIO */
2149
2150#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2151
2152/* helper storage struct */
2153struct io_state
2154{
2155 int errorno;
2156 I32 laststype; /* U16 in 5.10.0 */
2157 int laststatval;
2158 Stat_t statcache;
2159};
2160
2161static void
2162coro_aio_callback (pTHX_ CV *cv)
2163{
2164 dXSARGS;
2165 AV *state = (AV *)GENSUB_ARG;
2166 SV *coro = av_pop (state);
2167 SV *data_sv = newSV (sizeof (struct io_state));
2168
2169 av_extend (state, items);
2170
2171 sv_upgrade (data_sv, SVt_PV);
2172 SvCUR_set (data_sv, sizeof (struct io_state));
2173 SvPOK_only (data_sv);
2174
2175 {
2176 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2177
2178 data->errorno = errno;
2179 data->laststype = PL_laststype;
2180 data->laststatval = PL_laststatval;
2181 data->statcache = PL_statcache;
2182 }
2183
2184 /* now build the result vector out of all the parameters and the data_sv */
2185 {
2186 int i;
2187
2188 for (i = 0; i < items; ++i)
2189 av_push (state, SvREFCNT_inc_NN (ST (i)));
2190 }
2191
2192 av_push (state, data_sv);
2193
2194 api_ready (aTHX_ coro);
2195 SvREFCNT_dec (coro);
2196 SvREFCNT_dec ((AV *)state);
2197}
2198
2199static int
2200slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2201{
2202 AV *state = (AV *)frame->data;
2203
2204 /* if we are about to throw, return early */
2205 /* this does not cancel the aio request, but at least */
2206 /* it quickly returns */
2207 if (CORO_THROW)
2208 return 0;
2209
2210 /* one element that is an RV? repeat! */
2211 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2212 return 1;
2213
2214 /* restore status */
2215 {
2216 SV *data_sv = av_pop (state);
2217 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2218
2219 errno = data->errorno;
2220 PL_laststype = data->laststype;
2221 PL_laststatval = data->laststatval;
2222 PL_statcache = data->statcache;
2223
2224 SvREFCNT_dec (data_sv);
2225 }
2226
2227 /* push result values */
2228 {
2229 dSP;
2230 int i;
2231
2232 EXTEND (SP, AvFILLp (state) + 1);
2233 for (i = 0; i <= AvFILLp (state); ++i)
2234 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2235
2236 PUTBACK;
2237 }
946 2238
947 return 0; 2239 return 0;
948} 2240}
949 2241
950static void 2242static void
951api_ready (SV *coro) 2243slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
952{ 2244{
953 dTHX; 2245 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2246 SV *coro_hv = SvRV (coro_current);
2247 struct coro *coro = SvSTATE_hv (coro_hv);
954 2248
955 if (SvROK (coro)) 2249 /* put our coroutine id on the state arg */
956 coro = SvRV (coro); 2250 av_push (state, SvREFCNT_inc_NN (coro_hv));
957 2251
958 LOCK; 2252 /* first see whether we have a non-zero priority and set it as AIO prio */
959 coro_enq (SvREFCNT_inc (coro)); 2253 if (coro->prio)
960 UNLOCK;
961}
962
963static void
964prepare_schedule (struct transfer_args *ta)
965{
966 SV *current, *prev, *next;
967
968 current = GvSV (coro_current);
969
970 for (;;)
971 {
972 LOCK;
973 next = coro_deq (PRIO_MIN);
974 UNLOCK;
975
976 if (next)
977 break;
978
979 { 2254 {
980 dSP; 2255 dSP;
981 2256
982 ENTER; 2257 static SV *prio_cv;
983 SAVETMPS; 2258 static SV *prio_sv;
984 2259
2260 if (expect_false (!prio_cv))
2261 {
2262 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2263 prio_sv = newSViv (0);
2264 }
2265
985 PUSHMARK (SP); 2266 PUSHMARK (SP);
2267 sv_setiv (prio_sv, coro->prio);
2268 XPUSHs (prio_sv);
2269
986 PUTBACK; 2270 PUTBACK;
987 call_sv (GvSV (coro_idle), G_DISCARD); 2271 call_sv (prio_cv, G_VOID | G_DISCARD);
988
989 FREETMPS;
990 LEAVE;
991 } 2272 }
2273
2274 /* now call the original request */
2275 {
2276 dSP;
2277 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2278 int i;
2279
2280 PUSHMARK (SP);
2281
2282 /* first push all args to the stack */
2283 EXTEND (SP, items + 1);
2284
2285 for (i = 0; i < items; ++i)
2286 PUSHs (arg [i]);
2287
2288 /* now push the callback closure */
2289 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2290
2291 /* now call the AIO function - we assume our request is uncancelable */
2292 PUTBACK;
2293 call_sv ((SV *)req, G_VOID | G_DISCARD);
992 } 2294 }
993 2295
994 prev = SvRV (current); 2296 /* now that the requets is going, we loop toll we have a result */
995 SvRV (current) = next; 2297 frame->data = (void *)state;
996 2298 frame->prepare = prepare_schedule;
997 /* free this only after the transfer */ 2299 frame->check = slf_check_aio_req;
998 LOCK;
999 free_coro_mortal ();
1000 UNLOCK;
1001 coro_mortal = prev;
1002
1003 ta->prev = SvSTATE (prev);
1004 ta->next = SvSTATE (next);
1005 ta->flags = TRANSFER_SAVE_ALL;
1006} 2300}
1007 2301
1008static void 2302static void
1009prepare_cede (struct transfer_args *ta) 2303coro_aio_req_xs (pTHX_ CV *cv)
1010{ 2304{
1011 LOCK; 2305 dXSARGS;
1012 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1013 UNLOCK;
1014 2306
1015 prepare_schedule (ta); 2307 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
1016}
1017 2308
1018static void 2309 XSRETURN_EMPTY;
1019api_schedule (void)
1020{
1021 dTHX;
1022 struct transfer_args ta;
1023
1024 prepare_schedule (&ta);
1025 TRANSFER (ta);
1026} 2310}
1027 2311
1028static void 2312/*****************************************************************************/
1029api_cede (void)
1030{
1031 dTHX;
1032 struct transfer_args ta;
1033 2313
1034 prepare_cede (&ta);
1035 TRANSFER (ta);
1036}
1037
1038MODULE = Coro::State PACKAGE = Coro::State 2314MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1039 2315
1040PROTOTYPES: DISABLE 2316PROTOTYPES: DISABLE
1041 2317
1042BOOT: 2318BOOT:
1043{ 2319{
1044#ifdef USE_ITHREADS 2320#ifdef USE_ITHREADS
1045 MUTEX_INIT (&coro_mutex); 2321# if CORO_PTHREAD
2322 coro_thx = PERL_GET_CONTEXT;
2323# endif
1046#endif 2324#endif
1047 BOOT_PAGESIZE; 2325 BOOT_PAGESIZE;
1048 2326
2327 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2328 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2329
2330 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2331 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2332 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2333
2334 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2335 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2336 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2337
1049 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2338 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1050 2339
1051 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2340 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1052 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2341 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1053 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2342 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2343 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1054 2344
1055 main_mainstack = PL_mainstack; 2345 main_mainstack = PL_mainstack;
2346 main_top_env = PL_top_env;
1056 2347
2348 while (main_top_env->je_prev)
2349 main_top_env = main_top_env->je_prev;
2350
2351 {
2352 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2353
2354 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2355 hv_store_ent (PL_custom_op_names, slf,
2356 newSVpv ("coro_slf", 0), 0);
2357
2358 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2359 hv_store_ent (PL_custom_op_descs, slf,
2360 newSVpv ("coro schedule like function", 0), 0);
2361 }
2362
1057 coroapi.ver = CORO_API_VERSION; 2363 coroapi.ver = CORO_API_VERSION;
2364 coroapi.rev = CORO_API_REVISION;
2365
1058 coroapi.transfer = api_transfer; 2366 coroapi.transfer = api_transfer;
2367
2368 coroapi.sv_state = SvSTATE_;
2369 coroapi.execute_slf = api_execute_slf;
2370 coroapi.prepare_nop = prepare_nop;
2371 coroapi.prepare_schedule = prepare_schedule;
2372 coroapi.prepare_cede = prepare_cede;
2373 coroapi.prepare_cede_notself = prepare_cede_notself;
2374
2375 {
2376 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2377
2378 if (!svp) croak ("Time::HiRes is required");
2379 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2380
2381 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2382 }
1059 2383
1060 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2384 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1061} 2385}
1062 2386
1063SV * 2387SV *
1064new (char *klass, ...) 2388new (char *klass, ...)
1065 CODE: 2389 CODE:
1066{ 2390{
1067 struct coro *coro; 2391 struct coro *coro;
2392 MAGIC *mg;
1068 HV *hv; 2393 HV *hv;
1069 int i; 2394 int i;
1070 2395
1071 Newz (0, coro, 1, struct coro); 2396 Newz (0, coro, 1, struct coro);
1072 coro->args = newAV (); 2397 coro->args = newAV ();
2398 coro->flags = CF_NEW;
1073 2399
2400 if (coro_first) coro_first->prev = coro;
2401 coro->next = coro_first;
2402 coro_first = coro;
2403
1074 hv = newHV (); 2404 coro->hv = hv = newHV ();
1075 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2405 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2406 mg->mg_flags |= MGf_DUP;
1076 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2407 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1077 2408
2409 av_extend (coro->args, items - 1);
1078 for (i = 1; i < items; i++) 2410 for (i = 1; i < items; i++)
1079 av_push (coro->args, newSVsv (ST (i))); 2411 av_push (coro->args, newSVsv (ST (i)));
1080
1081 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1082 /*coro->stack = 0;*/
1083} 2412}
1084 OUTPUT: 2413 OUTPUT:
1085 RETVAL 2414 RETVAL
1086 2415
1087void 2416void
1088_set_stacklevel (...) 2417transfer (...)
1089 ALIAS: 2418 PROTOTYPE: $$
1090 Coro::State::transfer = 1 2419 CODE:
1091 Coro::schedule = 2 2420 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1092 Coro::cede = 3
1093 Coro::Cont::yield = 4
1094 CODE:
1095{
1096 struct transfer_args ta;
1097 2421
1098 switch (ix) 2422bool
1099 { 2423_destroy (SV *coro_sv)
1100 case 0: 2424 CODE:
1101 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 2425 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1102 ta.next = 0; 2426 OUTPUT:
1103 ta.flags = TRANSFER_SET_STACKLEVEL; 2427 RETVAL
1104 break;
1105
1106 case 1:
1107 if (items != 3)
1108 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1109
1110 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1111 break;
1112
1113 case 2:
1114 prepare_schedule (&ta);
1115 break;
1116
1117 case 3:
1118 prepare_cede (&ta);
1119 break;
1120
1121 case 4:
1122 {
1123 SV *yieldstack;
1124 SV *sv;
1125 AV *defav = GvAV (PL_defgv);
1126
1127 yieldstack = *hv_fetch (
1128 (HV *)SvRV (GvSV (coro_current)),
1129 "yieldstack", sizeof ("yieldstack") - 1,
1130 0
1131 );
1132
1133 /* set up @_ -- ugly */
1134 av_clear (defav);
1135 av_fill (defav, items - 1);
1136 while (items--)
1137 av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139 sv = av_pop ((AV *)SvRV (yieldstack));
1140 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142 ta.flags = 0;
1143 SvREFCNT_dec (sv);
1144 }
1145 break;
1146
1147 }
1148
1149 TRANSFER (ta);
1150}
1151 2428
1152void 2429void
1153_clone_state_from (SV *dst, SV *src)
1154 CODE:
1155{
1156 struct coro *coro_src = SvSTATE (src);
1157
1158 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160 ++coro_src->refcnt;
1161 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162}
1163
1164void
1165_exit (code) 2430_exit (int code)
1166 int code
1167 PROTOTYPE: $ 2431 PROTOTYPE: $
1168 CODE: 2432 CODE:
1169 _exit (code); 2433 _exit (code);
1170 2434
2435int
2436cctx_stacksize (int new_stacksize = 0)
2437 PROTOTYPE: ;$
2438 CODE:
2439 RETVAL = cctx_stacksize;
2440 if (new_stacksize)
2441 {
2442 cctx_stacksize = new_stacksize;
2443 ++cctx_gen;
2444 }
2445 OUTPUT:
2446 RETVAL
2447
2448int
2449cctx_max_idle (int max_idle = 0)
2450 PROTOTYPE: ;$
2451 CODE:
2452 RETVAL = cctx_max_idle;
2453 if (max_idle > 1)
2454 cctx_max_idle = max_idle;
2455 OUTPUT:
2456 RETVAL
2457
2458int
2459cctx_count ()
2460 PROTOTYPE:
2461 CODE:
2462 RETVAL = cctx_count;
2463 OUTPUT:
2464 RETVAL
2465
2466int
2467cctx_idle ()
2468 PROTOTYPE:
2469 CODE:
2470 RETVAL = cctx_idle;
2471 OUTPUT:
2472 RETVAL
2473
2474void
2475list ()
2476 PROTOTYPE:
2477 PPCODE:
2478{
2479 struct coro *coro;
2480 for (coro = coro_first; coro; coro = coro->next)
2481 if (coro->hv)
2482 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2483}
2484
2485void
2486call (Coro::State coro, SV *coderef)
2487 ALIAS:
2488 eval = 1
2489 CODE:
2490{
2491 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2492 {
2493 struct coro temp;
2494
2495 if (!(coro->flags & CF_RUNNING))
2496 {
2497 PUTBACK;
2498 save_perl (aTHX_ &temp);
2499 load_perl (aTHX_ coro);
2500 }
2501
2502 {
2503 dSP;
2504 ENTER;
2505 SAVETMPS;
2506 PUTBACK;
2507 PUSHSTACK;
2508 PUSHMARK (SP);
2509
2510 if (ix)
2511 eval_sv (coderef, 0);
2512 else
2513 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2514
2515 POPSTACK;
2516 SPAGAIN;
2517 FREETMPS;
2518 LEAVE;
2519 PUTBACK;
2520 }
2521
2522 if (!(coro->flags & CF_RUNNING))
2523 {
2524 save_perl (aTHX_ coro);
2525 load_perl (aTHX_ &temp);
2526 SPAGAIN;
2527 }
2528 }
2529}
2530
2531SV *
2532is_ready (Coro::State coro)
2533 PROTOTYPE: $
2534 ALIAS:
2535 is_ready = CF_READY
2536 is_running = CF_RUNNING
2537 is_new = CF_NEW
2538 is_destroyed = CF_DESTROYED
2539 CODE:
2540 RETVAL = boolSV (coro->flags & ix);
2541 OUTPUT:
2542 RETVAL
2543
2544void
2545throw (Coro::State self, SV *throw = &PL_sv_undef)
2546 PROTOTYPE: $;$
2547 CODE:
2548{
2549 struct coro *current = SvSTATE_current;
2550 SV **throwp = self == current ? &CORO_THROW : &self->except;
2551 SvREFCNT_dec (*throwp);
2552 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2553}
2554
2555void
2556api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2557 PROTOTYPE: $;$
2558 C_ARGS: aTHX_ coro, flags
2559
2560SV *
2561has_cctx (Coro::State coro)
2562 PROTOTYPE: $
2563 CODE:
2564 RETVAL = boolSV (!!coro->cctx);
2565 OUTPUT:
2566 RETVAL
2567
2568int
2569is_traced (Coro::State coro)
2570 PROTOTYPE: $
2571 CODE:
2572 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2573 OUTPUT:
2574 RETVAL
2575
2576UV
2577rss (Coro::State coro)
2578 PROTOTYPE: $
2579 ALIAS:
2580 usecount = 1
2581 CODE:
2582 switch (ix)
2583 {
2584 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2585 case 1: RETVAL = coro->usecount; break;
2586 }
2587 OUTPUT:
2588 RETVAL
2589
2590void
2591force_cctx ()
2592 PROTOTYPE:
2593 CODE:
2594 SvSTATE_current->cctx->idle_sp = 0;
2595
2596void
2597swap_defsv (Coro::State self)
2598 PROTOTYPE: $
2599 ALIAS:
2600 swap_defav = 1
2601 CODE:
2602 if (!self->slot)
2603 croak ("cannot swap state with coroutine that has no saved state,");
2604 else
2605 {
2606 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2607 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2608
2609 SV *tmp = *src; *src = *dst; *dst = tmp;
2610 }
2611
2612
1171MODULE = Coro::State PACKAGE = Coro 2613MODULE = Coro::State PACKAGE = Coro
1172 2614
1173BOOT: 2615BOOT:
1174{ 2616{
1175 int i; 2617 int i;
1176 2618
2619 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2620 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2621 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2622
2623 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2624 SvREADONLY_on (coro_current);
2625
1177 coro_stash = gv_stashpv ("Coro", TRUE); 2626 coro_stash = gv_stashpv ("Coro", TRUE);
1178 2627
1179 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2628 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1180 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2629 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1181 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2630 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2631 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2632 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2633 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185 2634
1186 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1187 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1188
1189 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2635 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190 coro_ready[i] = newAV (); 2636 coro_ready[i] = newAV ();
1191 2637
1192 { 2638 {
1193 SV *sv = perl_get_sv("Coro::API", 1); 2639 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1194 2640
1195 coroapi.schedule = api_schedule; 2641 coroapi.schedule = api_schedule;
1196 coroapi.cede = api_cede; 2642 coroapi.cede = api_cede;
2643 coroapi.cede_notself = api_cede_notself;
1197 coroapi.ready = api_ready; 2644 coroapi.ready = api_ready;
2645 coroapi.is_ready = api_is_ready;
1198 coroapi.nready = &coro_nready; 2646 coroapi.nready = coro_nready;
1199 coroapi.current = coro_current; 2647 coroapi.current = coro_current;
1200 2648
1201 GCoroAPI = &coroapi; 2649 /*GCoroAPI = &coroapi;*/
1202 sv_setiv (sv, (IV)&coroapi); 2650 sv_setiv (sv, (IV)&coroapi);
1203 SvREADONLY_on (sv); 2651 SvREADONLY_on (sv);
1204 } 2652 }
1205} 2653}
1206 2654
2655void
2656schedule (...)
2657 CODE:
2658 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2659
2660void
2661cede (...)
2662 CODE:
2663 CORO_EXECUTE_SLF_XS (slf_init_cede);
2664
2665void
2666cede_notself (...)
2667 CODE:
2668 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2669
2670void
2671_set_current (SV *current)
2672 PROTOTYPE: $
2673 CODE:
2674 SvREFCNT_dec (SvRV (coro_current));
2675 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2676
2677void
2678_set_readyhook (SV *hook)
2679 PROTOTYPE: $
2680 CODE:
2681 SvREFCNT_dec (coro_readyhook);
2682 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2683
1207int 2684int
1208prio (Coro::State coro, int newprio = 0) 2685prio (Coro::State coro, int newprio = 0)
2686 PROTOTYPE: $;$
1209 ALIAS: 2687 ALIAS:
1210 nice = 1 2688 nice = 1
1211 CODE: 2689 CODE:
1212{ 2690{
1213 RETVAL = coro->prio; 2691 RETVAL = coro->prio;
1214 2692
1215 if (items > 1) 2693 if (items > 1)
1216 { 2694 {
1217 if (ix) 2695 if (ix)
1218 newprio += coro->prio; 2696 newprio = coro->prio - newprio;
1219 2697
1220 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2698 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1221 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2699 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1222 2700
1223 coro->prio = newprio; 2701 coro->prio = newprio;
1224 } 2702 }
1225} 2703}
2704 OUTPUT:
2705 RETVAL
1226 2706
1227void 2707SV *
1228ready (SV *self) 2708ready (SV *self)
1229 PROTOTYPE: $ 2709 PROTOTYPE: $
1230 CODE: 2710 CODE:
1231 api_ready (self); 2711 RETVAL = boolSV (api_ready (aTHX_ self));
2712 OUTPUT:
2713 RETVAL
1232 2714
1233int 2715int
1234nready (...) 2716nready (...)
1235 PROTOTYPE: 2717 PROTOTYPE:
1236 CODE: 2718 CODE:
1237 RETVAL = coro_nready; 2719 RETVAL = coro_nready;
1238 OUTPUT: 2720 OUTPUT:
1239 RETVAL 2721 RETVAL
1240 2722
2723# for async_pool speedup
2724void
2725_pool_1 (SV *cb)
2726 CODE:
2727{
2728 HV *hv = (HV *)SvRV (coro_current);
2729 struct coro *coro = SvSTATE_hv ((SV *)hv);
2730 AV *defav = GvAV (PL_defgv);
2731 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2732 AV *invoke_av;
2733 int i, len;
2734
2735 if (!invoke)
2736 {
2737 SV *old = PL_diehook;
2738 PL_diehook = 0;
2739 SvREFCNT_dec (old);
2740 croak ("\3async_pool terminate\2\n");
2741 }
2742
2743 SvREFCNT_dec (coro->saved_deffh);
2744 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2745
2746 hv_store (hv, "desc", sizeof ("desc") - 1,
2747 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2748
2749 invoke_av = (AV *)SvRV (invoke);
2750 len = av_len (invoke_av);
2751
2752 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2753
2754 if (len > 0)
2755 {
2756 av_fill (defav, len - 1);
2757 for (i = 0; i < len; ++i)
2758 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2759 }
2760}
2761
2762void
2763_pool_2 (SV *cb)
2764 CODE:
2765{
2766 HV *hv = (HV *)SvRV (coro_current);
2767 struct coro *coro = SvSTATE_hv ((SV *)hv);
2768
2769 sv_setsv (cb, &PL_sv_undef);
2770
2771 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2772 coro->saved_deffh = 0;
2773
2774 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2775 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2776 {
2777 SV *old = PL_diehook;
2778 PL_diehook = 0;
2779 SvREFCNT_dec (old);
2780 croak ("\3async_pool terminate\2\n");
2781 }
2782
2783 av_clear (GvAV (PL_defgv));
2784 hv_store (hv, "desc", sizeof ("desc") - 1,
2785 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2786
2787 coro->prio = 0;
2788
2789 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2790 api_trace (aTHX_ coro_current, 0);
2791
2792 av_push (av_async_pool, newSVsv (coro_current));
2793}
2794
2795
2796MODULE = Coro::State PACKAGE = PerlIO::cede
2797
2798BOOT:
2799 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2800
2801
1241MODULE = Coro::State PACKAGE = Coro::AIO 2802MODULE = Coro::State PACKAGE = Coro::Semaphore
1242 2803
1243SV * 2804SV *
1244_get_state () 2805new (SV *klass, SV *count_ = 0)
1245 CODE: 2806 CODE:
1246{ 2807{
1247 struct { 2808 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
1248 int errorno; 2809 AV *av = newAV ();
1249 int laststype; 2810 SV **ary;
1250 int laststatval;
1251 Stat_t statcache;
1252 } data;
1253 2811
1254 data.errorno = errno; 2812 /* unfortunately, building manually saves memory */
1255 data.laststype = PL_laststype; 2813 Newx (ary, 2, SV *);
1256 data.laststatval = PL_laststatval; 2814 AvALLOC (av) = ary;
1257 data.statcache = PL_statcache; 2815 AvARRAY (av) = ary;
2816 AvMAX (av) = 1;
2817 AvFILLp (av) = 0;
2818 ary [0] = newSViv (count_ && SvOK (count_) ? SvIV (count_) : 1);
1258 2819
1259 RETVAL = newSVpvn ((char *)&data, sizeof data); 2820 RETVAL = sv_bless (newRV_noinc ((SV *)av), GvSTASH (CvGV (cv)));
1260} 2821}
1261 OUTPUT: 2822 OUTPUT:
1262 RETVAL 2823 RETVAL
1263 2824
2825SV *
2826count (SV *self)
2827 CODE:
2828 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
2829 OUTPUT:
2830 RETVAL
2831
1264void 2832void
1265_set_state (char *data_) 2833up (SV *self, int adjust = 1)
1266 PROTOTYPE: $ 2834 ALIAS:
2835 adjust = 1
2836 CODE:
2837 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
2838
2839void
2840down (SV *self)
2841 CODE:
2842 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
2843
2844void
2845wait (SV *self)
2846 CODE:
2847 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
2848
2849void
2850try (SV *self)
2851 PPCODE:
2852{
2853 AV *av = (AV *)SvRV (self);
2854 SV *count_sv = AvARRAY (av)[0];
2855 IV count = SvIVX (count_sv);
2856
2857 if (count > 0)
2858 {
2859 --count;
2860 SvIVX (count_sv) = count;
2861 XSRETURN_YES;
2862 }
2863 else
2864 XSRETURN_NO;
2865}
2866
2867void
2868waiters (SV *self)
2869 CODE:
2870{
2871 AV *av = (AV *)SvRV (self);
2872
2873 if (GIMME_V == G_SCALAR)
2874 XPUSHs (sv_2mortal (newSVsv (AvARRAY (av)[0])));
2875 else
2876 {
2877 int i;
2878 EXTEND (SP, AvFILLp (av) + 1 - 1);
2879 for (i = 1; i <= AvFILLp (av); ++i)
2880 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
2881 }
2882}
2883
2884
2885MODULE = Coro::State PACKAGE = Coro::AnyEvent
2886
2887BOOT:
2888 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2889
2890void
2891_schedule (...)
1267 CODE: 2892 CODE:
1268{ 2893{
1269 struct { 2894 static int incede;
1270 int errorno;
1271 int laststype;
1272 int laststatval;
1273 Stat_t statcache;
1274 } *data = (void *)data_;
1275 2895
1276 errno = data->errorno; 2896 api_cede_notself (aTHX);
1277 PL_laststype = data->laststype; 2897
1278 PL_laststatval = data->laststatval; 2898 ++incede;
1279 PL_statcache = data->statcache; 2899 while (coro_nready >= incede && api_cede (aTHX))
2900 ;
2901
2902 sv_setsv (sv_activity, &PL_sv_undef);
2903 if (coro_nready >= incede)
2904 {
2905 PUSHMARK (SP);
2906 PUTBACK;
2907 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2908 }
2909
2910 --incede;
1280} 2911}
2912
2913
2914MODULE = Coro::State PACKAGE = Coro::AIO
2915
2916void
2917_register (char *target, char *proto, SV *req)
2918 CODE:
2919{
2920 HV *st;
2921 GV *gvp;
2922 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
2923 /* newXSproto doesn't return the CV on 5.8 */
2924 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
2925 sv_setpv ((SV *)slf_cv, proto);
2926 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
2927}
2928

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