ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs.
Revision 1.305 by root, Wed Nov 19 10:44:41 2008 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <errno.h> 83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
33 108
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 110# undef CORO_STACKGUARD
36#endif 111#endif
37 112
38#ifndef STACKGUARD 113#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 114# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#if __GNUC__ >= 4
125# define dSTACKLEVEL int stacklevel_dummy
126# define STACKLEVEL __builtin_frame_address (0)
127#else
128# define dSTACKLEVEL volatile void *stacklevel
129# define STACKLEVEL ((void *)&stacklevel)
130#endif
131
132#define IN_DESTRUCT (PL_main_cv == Nullcv)
133
134#if __GNUC__ >= 3
135# define attribute(x) __attribute__(x)
136# define expect(expr,value) __builtin_expect ((expr),(value))
137# define INLINE static inline
138#else
139# define attribute(x)
140# define expect(expr,value) (expr)
141# define INLINE static
142#endif
143
144#define expect_false(expr) expect ((expr) != 0, 0)
145#define expect_true(expr) expect ((expr) != 0, 1)
146
147#define NOINLINE attribute ((noinline))
148
149#include "CoroAPI.h"
150#define GCoroAPI (&coroapi) /* very sneaky */
151
152#ifdef USE_ITHREADS
153# if CORO_PTHREAD
154static void *coro_thx;
51# endif 155# endif
52# include <limits.h>
53# ifndef PAGESIZE
54# define PAGESIZE pagesize
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56static long pagesize;
57# else
58# define BOOT_PAGESIZE
59# endif 156#endif
60#endif
61 157
62#define SUB_INIT "Coro::State::initialize" 158static double (*nvtime)(); /* so why doesn't it take void? */
63 159
64/* The next macro should declare a variable stacklevel that contains and approximation 160/* we hijack an hopefully unused CV flag for our purposes */
65 * to the current C stack pointer. Its property is that it changes with each call 161#define CVf_SLF 0x4000
66 * and should be unique. */ 162static OP *pp_slf (pTHX);
67#define dSTACKLEVEL void *stacklevel = &stacklevel
68 163
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 164static U32 cctx_gen;
70 165static size_t cctx_stacksize = CORO_STACKSIZE;
71#define labs(l) ((l) >= 0 ? (l) : -(l))
72
73#include "CoroAPI.h"
74
75#ifdef USE_ITHREADS
76static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else
80# define LOCK (void)0
81# define UNLOCK (void)0
82#endif
83
84static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 169static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
88 171
89/* this is actually not only the c stack but also c registers etc... */ 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};
197
198/* this is a structure representing a c-level coroutine */
90typedef struct { 199typedef struct coro_cctx
91 int refcnt; /* pointer reference counter */ 200{
92 int usecnt; /* shared by how many coroutines */ 201 struct coro_cctx *next;
93 int gencnt; /* generation counter */
94 202
203 /* the stack */
204 void *sptr;
205 size_t ssize;
206
207 /* cpu state */
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 */
210 JMPENV *top_env;
95 coro_context cctx; 211 coro_context cctx;
96 212
97 void *sptr; 213 U32 gen;
98 long ssize; /* positive == mmap, otherwise malloc */ 214#if CORO_USE_VALGRIND
99} coro_stack; 215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
100 219
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))
240
241/* this is a structure representing a perl-level coroutine */
101struct coro { 242struct coro {
102 /* the optional C context */ 243 /* the C coroutine allocated to this perl coroutine, if any */
103 coro_stack *stack; 244 coro_cctx *cctx;
104 void *cursp;
105 int gencnt;
106 245
107 /* optionally saved, might be zero */ 246 /* state data */
108 AV *defav; 247 struct CoroSLF slf_frame; /* saved slf frame */
109 SV *defsv;
110 SV *errsv;
111
112 /* saved global state not related to stacks */
113 U8 dowarn;
114 I32 in_eval;
115
116 /* the stacks and related info (callchain etc..) */
117 PERL_SI *curstackinfo;
118 AV *curstack;
119 AV *mainstack; 248 AV *mainstack;
120 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
121 OP *op; 250
122 SV **curpad; 251 AV *args; /* data associated with this coroutine (initial args) */
123 AV *comppad; 252 int refcnt; /* coroutines are refcounted, yes */
124 CV *compcv; 253 int flags; /* CF_ flags */
125 SV **stack_base; 254 HV *hv; /* the perl hash associated with this coro, if any */
126 SV **stack_max; 255 void (*on_destroy)(pTHX_ struct coro *coro);
127 SV **tmps_stack; 256
128 I32 tmps_floor; 257 /* statistics */
129 I32 tmps_ix; 258 int usecount; /* number of transfers to this coro */
130 I32 tmps_max;
131 I32 *markstack;
132 I32 *markstack_ptr;
133 I32 *markstack_max;
134 I32 *scopestack;
135 I32 scopestack_ix;
136 I32 scopestack_max;
137 ANY *savestack;
138 I32 savestack_ix;
139 I32 savestack_max;
140 OP **retstack;
141 I32 retstack_ix;
142 I32 retstack_max;
143 PMOP *curpm;
144 COP *curcop;
145 JMPENV *top_env;
146 259
147 /* coro process data */ 260 /* coro process data */
148 int prio; 261 int prio;
262 SV *except; /* exception to be thrown */
263 SV *rouse_cb;
149 264
150 /* data associated with this coroutine (initial args) */ 265 /* async_pool */
151 AV *args; 266 SV *saved_deffh;
152 int refcnt; 267
268 /* linked list */
269 struct coro *next, *prev;
153}; 270};
154 271
155typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
157 274
275/* the following variables are effectively part of the perl context */
276/* and get copied between struct coro and these variables */
277/* the mainr easonw e don't support windows process emulation */
278static struct CoroSLF slf_frame; /* the current slf frame */
279
280/** Coro ********************************************************************/
281
282#define PRIO_MAX 3
283#define PRIO_HIGH 1
284#define PRIO_NORMAL 0
285#define PRIO_LOW -1
286#define PRIO_IDLE -3
287#define PRIO_MIN -4
288
289/* for Coro.pm */
290static SV *coro_current;
291static SV *coro_readyhook;
292static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
293static struct coro *coro_first;
294#define coro_nready coroapi.nready
295
296/** lowlevel stuff **********************************************************/
297
298static SV *
299coro_get_sv (pTHX_ const char *name, int create)
300{
301#if PERL_VERSION_ATLEAST (5,10,0)
302 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
303 get_sv (name, create);
304#endif
305 return get_sv (name, create);
306}
307
308static AV *
309coro_get_av (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_av (name, create);
314#endif
315 return get_av (name, create);
316}
317
318static HV *
319coro_get_hv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_hv (name, create);
324#endif
325 return get_hv (name, create);
326}
327
158static AV * 328static AV *
159coro_clone_padlist (pTHX_ CV *cv) 329coro_clone_padlist (pTHX_ CV *cv)
160{ 330{
161 AV *padlist = CvPADLIST (cv); 331 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 332 AV *newpadlist, *newpad;
163 333
164 newpadlist = newAV (); 334 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 335 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 336#if PERL_VERSION_ATLEAST (5,10,0)
337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
338#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 340#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 342 --AvFILLp (padlist);
173 343
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
175 av_store (newpadlist, 1, (SV *)newpad); 345 av_store (newpadlist, 1, (SV *)newpad);
176 346
177 return newpadlist; 347 return newpadlist;
178} 348}
179 349
… …
209 379
210 /* casting is fun. */ 380 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 382 free_padlist (aTHX_ padlist);
213 383
214 SvREFCNT_dec (av); 384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 385
216 return 0; 386 return 0;
217} 387}
218 388
389#define CORO_MAGIC_type_cv 26
219#define PERL_MAGIC_coro PERL_MAGIC_ext 390#define CORO_MAGIC_type_state PERL_MAGIC_ext
220 391
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 392static MGVTBL coro_cv_vtbl = {
393 0, 0, 0, 0,
394 coro_cv_free
395};
396
397#define CORO_MAGIC_NN(sv, type) \
398 (expect_true (SvMAGIC (sv)->mg_type == type) \
399 ? SvMAGIC (sv) \
400 : mg_find (sv, type))
401
402#define CORO_MAGIC(sv, type) \
403 (expect_true (SvMAGIC (sv)) \
404 ? CORO_MAGIC_NN (sv, type) \
405 : 0)
406
407#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
408#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
409
410INLINE struct coro *
411SvSTATE_ (pTHX_ SV *coro)
412{
413 HV *stash;
414 MAGIC *mg;
415
416 if (SvROK (coro))
417 coro = SvRV (coro);
418
419 if (expect_false (SvTYPE (coro) != SVt_PVHV))
420 croak ("Coro::State object required");
421
422 stash = SvSTASH (coro);
423 if (expect_false (stash != coro_stash && stash != coro_state_stash))
424 {
425 /* very slow, but rare, check */
426 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
427 croak ("Coro::State object required");
428 }
429
430 mg = CORO_MAGIC_state (coro);
431 return (struct coro *)mg->mg_ptr;
432}
433
434#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
435
436/* faster than SvSTATE, but expects a coroutine hv */
437#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
438#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
222 439
223/* the next two functions merely cache the padlists */ 440/* the next two functions merely cache the padlists */
224static void 441static void
225get_padlist (pTHX_ CV *cv) 442get_padlist (pTHX_ CV *cv)
226{ 443{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 444 MAGIC *mg = CORO_MAGIC_cv (cv);
445 AV *av;
228 446
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 447 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 448 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 449 else
232 { 450 {
233#if 0 451#if CORO_PREFER_PERL_FUNCTIONS
234 /* this should work - but it doesn't :( */ 452 /* this is probably cleaner? but also slower! */
453 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 454 CV *cp = Perl_cv_clone (aTHX_ cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 455 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 456 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 457 SvREFCNT_dec (cp);
239#else 458#else
… …
243} 462}
244 463
245static void 464static void
246put_padlist (pTHX_ CV *cv) 465put_padlist (pTHX_ CV *cv)
247{ 466{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 467 MAGIC *mg = CORO_MAGIC_cv (cv);
468 AV *av;
249 469
250 if (!mg) 470 if (expect_false (!mg))
251 { 471 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254 mg->mg_virtual = &vtbl_coro;
255 mg->mg_obj = (SV *)newAV ();
256 }
257 472
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 473 av = (AV *)mg->mg_obj;
259}
260 474
261#define SB do { 475 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 476 av_extend (av, AvMAX (av) + 1);
263 477
264#define LOAD(state) load_state(aTHX_ (state)); 478 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 479}
266 480
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 481/** load & save, init *******************************************************/
268 482
269static void 483static void
270load_state(pTHX_ Coro__State c) 484load_perl (pTHX_ Coro__State c)
271{ 485{
272 PL_dowarn = c->dowarn; 486 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 487 c->slot = 0;
274 488
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 489 PL_mainstack = c->mainstack;
278 PL_stack_sp = c->stack_sp;
279 PL_op = c->op;
280 PL_curpad = c->curpad;
281 PL_comppad = c->comppad;
282 PL_compcv = c->compcv;
283 PL_stack_base = c->stack_base;
284 PL_stack_max = c->stack_max;
285 PL_tmps_stack = c->tmps_stack;
286 PL_tmps_floor = c->tmps_floor;
287 PL_tmps_ix = c->tmps_ix;
288 PL_tmps_max = c->tmps_max;
289 PL_markstack = c->markstack;
290 PL_markstack_ptr = c->markstack_ptr;
291 PL_markstack_max = c->markstack_max;
292 PL_scopestack = c->scopestack;
293 PL_scopestack_ix = c->scopestack_ix;
294 PL_scopestack_max = c->scopestack_max;
295 PL_savestack = c->savestack;
296 PL_savestack_ix = c->savestack_ix;
297 PL_savestack_max = c->savestack_max;
298#if PERL_VERSION < 9
299 PL_retstack = c->retstack;
300 PL_retstack_ix = c->retstack_ix;
301 PL_retstack_max = c->retstack_max;
302#endif
303 PL_curpm = c->curpm;
304 PL_curcop = c->curcop;
305 PL_top_env = c->top_env;
306 490
307 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 491 GvSV (PL_defgv) = slot->defsv;
308 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 492 GvAV (PL_defgv) = slot->defav;
309 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 493 GvSV (PL_errgv) = slot->errsv;
494 GvSV (irsgv) = slot->irsgv;
495
496 #define VAR(name,type) PL_ ## name = slot->name;
497 # include "state.h"
498 #undef VAR
310 499
311 { 500 {
312 dSP; 501 dSP;
502
313 CV *cv; 503 CV *cv;
314 504
315 /* now do the ugly restore mess */ 505 /* now do the ugly restore mess */
316 while ((cv = (CV *)POPs)) 506 while (expect_true (cv = (CV *)POPs))
317 { 507 {
318 AV *padlist = (AV *)POPs;
319
320 if (padlist)
321 {
322 put_padlist (aTHX_ cv); /* mark this padlist as available */ 508 put_padlist (aTHX_ cv); /* mark this padlist as available */
323 CvPADLIST(cv) = padlist; 509 CvDEPTH (cv) = PTR2IV (POPs);
324 } 510 CvPADLIST (cv) = (AV *)POPs;
325
326 ++CvDEPTH(cv);
327 } 511 }
328 512
329 PUTBACK; 513 PUTBACK;
330 } 514 }
331}
332 515
516 slf_frame = c->slf_frame;
517 CORO_THROW = c->except;
518}
519
333static void 520static void
334save_state(pTHX_ Coro__State c, int flags) 521save_perl (pTHX_ Coro__State c)
335{ 522{
523 c->except = CORO_THROW;
524 c->slf_frame = slf_frame;
525
336 { 526 {
337 dSP; 527 dSP;
338 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
339 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
340 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
342 /* 532 /*
343 * the worst thing you can imagine happens first - we have to save 533 * the worst thing you can imagine happens first - we have to save
344 * (and reinitialize) all cv's in the whole callchain :( 534 * (and reinitialize) all cv's in the whole callchain :(
345 */ 535 */
346 536
347 PUSHs (Nullsv); 537 XPUSHs (Nullsv);
348 /* this loop was inspired by pp_caller */ 538 /* this loop was inspired by pp_caller */
349 for (;;) 539 for (;;)
350 { 540 {
351 while (cxix >= 0) 541 while (expect_true (cxix >= 0))
352 { 542 {
353 PERL_CONTEXT *cx = &ccstk[cxix--]; 543 PERL_CONTEXT *cx = &ccstk[cxix--];
354 544
355 if (CxTYPE(cx) == CXt_SUB) 545 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
356 { 546 {
357 CV *cv = cx->blk_sub.cv; 547 CV *cv = cx->blk_sub.cv;
548
358 if (CvDEPTH(cv)) 549 if (expect_true (CvDEPTH (cv)))
359 { 550 {
360 EXTEND (SP, CvDEPTH(cv)*2); 551 EXTEND (SP, 3);
361
362 while (--CvDEPTH(cv))
363 {
364 /* this tells the restore code to increment CvDEPTH */
365 PUSHs (Nullsv);
366 PUSHs ((SV *)cv);
367 }
368
369 PUSHs ((SV *)CvPADLIST(cv)); 552 PUSHs ((SV *)CvPADLIST (cv));
553 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
370 PUSHs ((SV *)cv); 554 PUSHs ((SV *)cv);
371 555
556 CvDEPTH (cv) = 0;
372 get_padlist (aTHX_ cv); 557 get_padlist (aTHX_ cv);
373 } 558 }
374 } 559 }
375#ifdef CXt_FORMAT
376 else if (CxTYPE(cx) == CXt_FORMAT)
377 {
378 /* I never used formats, so how should I know how these are implemented? */
379 /* my bold guess is as a simple, plain sub... */
380 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381 }
382#endif
383 } 560 }
384 561
385 if (top_si->si_type == PERLSI_MAIN) 562 if (expect_true (top_si->si_type == PERLSI_MAIN))
386 break; 563 break;
387 564
388 top_si = top_si->si_prev; 565 top_si = top_si->si_prev;
389 ccstk = top_si->si_cxstack; 566 ccstk = top_si->si_cxstack;
390 cxix = top_si->si_cxix; 567 cxix = top_si->si_cxix;
391 } 568 }
392 569
393 PUTBACK; 570 PUTBACK;
394 } 571 }
395 572
396 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 573 /* allocate some space on the context stack for our purposes */
397 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 574 /* we manually unroll here, as usually 2 slots is enough */
398 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 575 if (SLOT_COUNT >= 1) CXINC;
576 if (SLOT_COUNT >= 2) CXINC;
577 if (SLOT_COUNT >= 3) CXINC;
578 {
579 int i;
580 for (i = 3; i < SLOT_COUNT; ++i)
581 CXINC;
582 }
583 cxstack_ix -= SLOT_COUNT; /* undo allocation */
399 584
400 c->dowarn = PL_dowarn;
401 c->in_eval = PL_in_eval;
402
403 c->curstackinfo = PL_curstackinfo;
404 c->curstack = PL_curstack;
405 c->mainstack = PL_mainstack; 585 c->mainstack = PL_mainstack;
406 c->stack_sp = PL_stack_sp; 586
407 c->op = PL_op; 587 {
408 c->curpad = PL_curpad; 588 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
409 c->comppad = PL_comppad; 589
410 c->compcv = PL_compcv; 590 slot->defav = GvAV (PL_defgv);
411 c->stack_base = PL_stack_base; 591 slot->defsv = DEFSV;
412 c->stack_max = PL_stack_max; 592 slot->errsv = ERRSV;
413 c->tmps_stack = PL_tmps_stack; 593 slot->irsgv = GvSV (irsgv);
414 c->tmps_floor = PL_tmps_floor; 594
415 c->tmps_ix = PL_tmps_ix; 595 #define VAR(name,type) slot->name = PL_ ## name;
416 c->tmps_max = PL_tmps_max; 596 # include "state.h"
417 c->markstack = PL_markstack; 597 #undef VAR
418 c->markstack_ptr = PL_markstack_ptr; 598 }
419 c->markstack_max = PL_markstack_max;
420 c->scopestack = PL_scopestack;
421 c->scopestack_ix = PL_scopestack_ix;
422 c->scopestack_max = PL_scopestack_max;
423 c->savestack = PL_savestack;
424 c->savestack_ix = PL_savestack_ix;
425 c->savestack_max = PL_savestack_max;
426#if PERL_VERSION < 9
427 c->retstack = PL_retstack;
428 c->retstack_ix = PL_retstack_ix;
429 c->retstack_max = PL_retstack_max;
430#endif
431 c->curpm = PL_curpm;
432 c->curcop = PL_curcop;
433 c->top_env = PL_top_env;
434} 599}
435 600
436/* 601/*
437 * allocate various perl stacks. This is an exact copy 602 * allocate various perl stacks. This is almost an exact copy
438 * of perl.c:init_stacks, except that it uses less memory 603 * of perl.c:init_stacks, except that it uses less memory
439 * on the (sometimes correct) assumption that coroutines do 604 * on the (sometimes correct) assumption that coroutines do
440 * not usually need a lot of stackspace. 605 * not usually need a lot of stackspace.
441 */ 606 */
607#if CORO_PREFER_PERL_FUNCTIONS
608# define coro_init_stacks(thx) init_stacks ()
609#else
442static void 610static void
443coro_init_stacks (pTHX) 611coro_init_stacks (pTHX)
444{ 612{
445 LOCK; 613 PL_curstackinfo = new_stackinfo(32, 8);
446
447 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448 PL_curstackinfo->si_type = PERLSI_MAIN; 614 PL_curstackinfo->si_type = PERLSI_MAIN;
449 PL_curstack = PL_curstackinfo->si_stack; 615 PL_curstack = PL_curstackinfo->si_stack;
450 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 616 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451 617
452 PL_stack_base = AvARRAY(PL_curstack); 618 PL_stack_base = AvARRAY(PL_curstack);
453 PL_stack_sp = PL_stack_base; 619 PL_stack_sp = PL_stack_base;
454 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 620 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455 621
456 New(50,PL_tmps_stack,96,SV*); 622 New(50,PL_tmps_stack,32,SV*);
457 PL_tmps_floor = -1; 623 PL_tmps_floor = -1;
458 PL_tmps_ix = -1; 624 PL_tmps_ix = -1;
459 PL_tmps_max = 96; 625 PL_tmps_max = 32;
460 626
461 New(54,PL_markstack,16,I32); 627 New(54,PL_markstack,16,I32);
462 PL_markstack_ptr = PL_markstack; 628 PL_markstack_ptr = PL_markstack;
463 PL_markstack_max = PL_markstack + 16; 629 PL_markstack_max = PL_markstack + 16;
464 630
465#ifdef SET_MARK_OFFSET 631#ifdef SET_MARK_OFFSET
466 SET_MARK_OFFSET; 632 SET_MARK_OFFSET;
467#endif 633#endif
468 634
469 New(54,PL_scopestack,16,I32); 635 New(54,PL_scopestack,8,I32);
470 PL_scopestack_ix = 0; 636 PL_scopestack_ix = 0;
471 PL_scopestack_max = 16; 637 PL_scopestack_max = 8;
472 638
473 New(54,PL_savestack,96,ANY); 639 New(54,PL_savestack,24,ANY);
474 PL_savestack_ix = 0; 640 PL_savestack_ix = 0;
475 PL_savestack_max = 96; 641 PL_savestack_max = 24;
476 642
477#if PERL_VERSION < 9 643#if !PERL_VERSION_ATLEAST (5,10,0)
478 New(54,PL_retstack,8,OP*); 644 New(54,PL_retstack,4,OP*);
479 PL_retstack_ix = 0; 645 PL_retstack_ix = 0;
480 PL_retstack_max = 8; 646 PL_retstack_max = 4;
481#endif 647#endif
482
483 UNLOCK;
484} 648}
649#endif
485 650
486/* 651/*
487 * destroy the stacks, the callchain etc... 652 * destroy the stacks, the callchain etc...
488 */ 653 */
489static void 654static void
490destroy_stacks(pTHX) 655coro_destruct_stacks (pTHX)
491{ 656{
492 if (!IN_DESTRUCT)
493 {
494 /* is this ugly, I ask? */
495 LEAVE_SCOPE (0);
496
497 /* sure it is, but more important: is it correct?? :/ */
498 FREETMPS;
499
500 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
501 }
502
503 while (PL_curstackinfo->si_next) 657 while (PL_curstackinfo->si_next)
504 PL_curstackinfo = PL_curstackinfo->si_next; 658 PL_curstackinfo = PL_curstackinfo->si_next;
505 659
506 while (PL_curstackinfo) 660 while (PL_curstackinfo)
507 { 661 {
508 PERL_SI *p = PL_curstackinfo->si_prev; 662 PERL_SI *p = PL_curstackinfo->si_prev;
509 663
510 { /*D*//*remove*/
511 dSP;
512 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513 PUTBACK; /* possibly superfluous */
514 }
515
516 if (!IN_DESTRUCT) 664 if (!IN_DESTRUCT)
517 {
518 dounwind (-1);/*D*//*remove*/
519 SvREFCNT_dec (PL_curstackinfo->si_stack); 665 SvREFCNT_dec (PL_curstackinfo->si_stack);
520 }
521 666
522 Safefree (PL_curstackinfo->si_cxstack); 667 Safefree (PL_curstackinfo->si_cxstack);
523 Safefree (PL_curstackinfo); 668 Safefree (PL_curstackinfo);
524 PL_curstackinfo = p; 669 PL_curstackinfo = p;
525 } 670 }
526 671
527 Safefree (PL_tmps_stack); 672 Safefree (PL_tmps_stack);
528 Safefree (PL_markstack); 673 Safefree (PL_markstack);
529 Safefree (PL_scopestack); 674 Safefree (PL_scopestack);
530 Safefree (PL_savestack); 675 Safefree (PL_savestack);
531#if PERL_VERSION < 9 676#if !PERL_VERSION_ATLEAST (5,10,0)
532 Safefree (PL_retstack); 677 Safefree (PL_retstack);
533#endif 678#endif
534} 679}
535 680
536static void 681static size_t
537allocate_stack (Coro__State ctx, int alloc) 682coro_rss (pTHX_ struct coro *coro)
538{ 683{
539 coro_stack *stack; 684 size_t rss = sizeof (*coro);
540 685
541 New (0, stack, 1, coro_stack); 686 if (coro->mainstack)
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546
547 if (alloc)
548 { 687 {
549#if HAVE_MMAP 688 perl_slots tmp_slot;
550 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 689 perl_slots *slot;
551 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 690
552 if (stack->sptr != (void *)-1) 691 if (coro->flags & CF_RUNNING)
553 { 692 {
554# if STACKGUARD 693 slot = &tmp_slot;
555 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 694
556# endif 695 #define VAR(name,type) slot->name = PL_ ## name;
696 # include "state.h"
697 #undef VAR
557 } 698 }
558 else 699 else
559#endif 700 slot = coro->slot;
701
702 if (slot)
560 { 703 {
561 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 704 rss += sizeof (slot->curstackinfo);
562 New (0, stack->sptr, STACKSIZE, long); 705 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
706 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
707 rss += slot->tmps_max * sizeof (SV *);
708 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
709 rss += slot->scopestack_max * sizeof (I32);
710 rss += slot->savestack_max * sizeof (ANY);
711
712#if !PERL_VERSION_ATLEAST (5,10,0)
713 rss += slot->retstack_max * sizeof (OP *);
714#endif
563 } 715 }
564 } 716 }
565 else
566 stack->sptr = 0;
567 717
568 ctx->stack = stack; 718 return rss;
569} 719}
570 720
721/** coroutine stack handling ************************************************/
722
723static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
724static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
725static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
726
727/* apparently < 5.8.8 */
728#ifndef MgPV_nolen_const
729#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
730 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
731 (const char*)(mg)->mg_ptr)
732#endif
733
734/*
735 * This overrides the default magic get method of %SIG elements.
736 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
737 * and instead of tryign to save and restore the hash elements, we just provide
738 * readback here.
739 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
740 * not expecting this to actually change the hook. This is a potential problem
741 * when a schedule happens then, but we ignore this.
742 */
571static void 743static int
572deallocate_stack (Coro__State ctx) 744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
573{ 745{
574 coro_stack *stack = ctx->stack; 746 const char *s = MgPV_nolen_const (mg);
575 747
576 ctx->stack = 0; 748 if (*s == '_')
577
578 if (stack)
579 { 749 {
580 if (!--stack->refcnt) 750 SV **svp = 0;
751
752 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
753 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
754
755 if (svp)
581 { 756 {
582#ifdef HAVE_MMAP 757 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
583 if (stack->ssize > 0 && stack->sptr) 758 return 0;
584 munmap (stack->sptr, stack->ssize);
585 else
586#endif
587 Safefree (stack->sptr);
588
589 Safefree (stack);
590 } 759 }
591 else if (ctx->gencnt == stack->gencnt) 760 }
592 --stack->usecnt; 761
762 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
763}
764
765static int
766coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
593 } 771 {
594} 772 SV **svp = 0;
595 773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 SV *old = *svp;
780 *svp = 0;
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
787}
788
596static void 789static int
597setup_coro (void *arg) 790coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
791{
792 const char *s = MgPV_nolen_const (mg);
793
794 if (*s == '_')
795 {
796 SV **svp = 0;
797
798 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
799 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
800
801 if (svp)
802 {
803 SV *old = *svp;
804 *svp = newSVsv (sv);
805 SvREFCNT_dec (old);
806 return 0;
807 }
808 }
809
810 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
811}
812
813static void
814prepare_nop (pTHX_ struct coro_transfer_args *ta)
815{
816 /* kind of mega-hacky, but works */
817 ta->next = ta->prev = (struct coro *)ta;
818}
819
820static int
821slf_check_nop (pTHX_ struct CoroSLF *frame)
822{
823 return 0;
824}
825
826static UNOP coro_setup_op;
827
828static void NOINLINE /* noinline to keep it out of the transfer fast path */
829coro_setup (pTHX_ struct coro *coro)
598{ 830{
599 /* 831 /*
600 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
601 */ 833 */
602 dTHX;
603 dSP;
604 Coro__State ctx = (Coro__State)arg;
605 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
606
607 coro_init_stacks (aTHX); 834 coro_init_stacks (aTHX);
608 /*PL_curcop = 0;*/ 835
609 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 836 PL_runops = RUNOPS_DEFAULT;
837 PL_curcop = &PL_compiling;
838 PL_in_eval = EVAL_NULL;
839 PL_comppad = 0;
840 PL_curpm = 0;
841 PL_curpad = 0;
842 PL_localizing = 0;
843 PL_dirty = 0;
844 PL_restartop = 0;
845#if PERL_VERSION_ATLEAST (5,10,0)
846 PL_parser = 0;
847#endif
848
849 /* recreate the die/warn hooks */
850 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
851 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
852
853 GvSV (PL_defgv) = newSV (0);
854 GvAV (PL_defgv) = coro->args; coro->args = 0;
855 GvSV (PL_errgv) = newSV (0);
856 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
857 PL_rs = newSVsv (GvSV (irsgv));
858 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
859
860 {
861 dSP;
862 UNOP myop;
863
864 Zero (&myop, 1, UNOP);
865 myop.op_next = Nullop;
866 myop.op_flags = OPf_WANT_VOID;
867
868 PUSHMARK (SP);
869 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
870 PUTBACK;
871 PL_op = (OP *)&myop;
872 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
873 SPAGAIN;
874 }
875
876 /* this newly created coroutine might be run on an existing cctx which most
877 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
878 */
879 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
880 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
881
882 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
883 coro_setup_op.op_next = PL_op;
884 coro_setup_op.op_type = OP_CUSTOM;
885 coro_setup_op.op_ppaddr = pp_slf;
886 /* no flags required, as an init function won't be called */
887
888 PL_op = (OP *)&coro_setup_op;
889
890 /* copy throw, in case it was set before coro_setup */
891 CORO_THROW = coro->except;
892}
893
894static void
895coro_destruct (pTHX_ struct coro *coro)
896{
897 if (!IN_DESTRUCT)
898 {
899 /* restore all saved variables and stuff */
900 LEAVE_SCOPE (0);
901 assert (PL_tmps_floor == -1);
902
903 /* free all temporaries */
904 FREETMPS;
905 assert (PL_tmps_ix == -1);
906
907 /* unwind all extra stacks */
908 POPSTACK_TO (PL_mainstack);
909
910 /* unwind main stack */
911 dounwind (-1);
912 }
913
914 SvREFCNT_dec (GvSV (PL_defgv));
610 SvREFCNT_dec (GvAV (PL_defgv)); 915 SvREFCNT_dec (GvAV (PL_defgv));
611 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 916 SvREFCNT_dec (GvSV (PL_errgv));
917 SvREFCNT_dec (PL_defoutgv);
918 SvREFCNT_dec (PL_rs);
919 SvREFCNT_dec (GvSV (irsgv));
612 920
613 SPAGAIN; 921 SvREFCNT_dec (PL_diehook);
922 SvREFCNT_dec (PL_warnhook);
923
924 SvREFCNT_dec (CORO_THROW);
925 SvREFCNT_dec (coro->saved_deffh);
926 SvREFCNT_dec (coro->rouse_cb);
614 927
615 if (ctx->stack) 928 coro_destruct_stacks (aTHX);
616 { 929}
617 ctx->cursp = 0;
618 930
619 PUSHMARK(SP); 931INLINE void
620 PUTBACK; 932free_coro_mortal (pTHX)
621 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 933{
622 934 if (expect_true (coro_mortal))
623 if (SvTRUE (ERRSV))
624 croak (NULL);
625 else
626 croak ("FATAL: CCTXT coroutine returned!");
627 } 935 {
628 else 936 SvREFCNT_dec (coro_mortal);
937 coro_mortal = 0;
629 { 938 }
630 UNOP myop; 939}
631 940
632 Zero(&myop, 1, UNOP); 941static int
633 myop.op_next = Nullop; 942runops_trace (pTHX)
634 myop.op_flags = OPf_WANT_VOID; 943{
944 COP *oldcop = 0;
945 int oldcxix = -2;
946 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
947 coro_cctx *cctx = coro->cctx;
635 948
636 PL_op = (OP *)&myop; 949 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
637
638 PUSHMARK(SP);
639 XPUSHs (sub_init);
640 /*
641 * the next line is slightly wrong, as PL_op->op_next
642 * is actually being executed so we skip the first op.
643 * that doesn't matter, though, since it is only
644 * pp_nextstate and we never return...
645 * ah yes, and I don't care anyways ;)
646 */
647 PUTBACK;
648 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649 SPAGAIN;
650
651 ENTER; /* necessary e.g. for dounwind */
652 } 950 {
653} 951 PERL_ASYNC_CHECK ();
654 952
655static void 953 if (cctx->flags & CC_TRACE_ALL)
656continue_coro (void *arg)
657{
658 /*
659 * this is a _very_ stripped down perl interpreter ;)
660 */
661 dTHX;
662 Coro__State ctx = (Coro__State)arg;
663
664 PL_top_env = &PL_start_env;
665
666 ctx->cursp = 0;
667 PL_op = PL_op->op_next;
668 CALLRUNOPS(aTHX);
669
670 abort ();
671}
672
673/* never call directly, always through the coro_state_transfer global variable */
674static void
675transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
676{
677 dSTACKLEVEL;
678
679 if (prev != next)
680 {
681 /* has this coro been created yet? */
682 if (next->mainstack)
683 { 954 {
684 LOCK; 955 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
685 SAVE (prev, flags);
686 LOAD (next);
687 UNLOCK;
688
689 /* mark this state as in-use */
690 next->mainstack = 0;
691 next->tmps_ix = -2;
692
693 /* stacklevel changed? if yes, grab the stack for us! */
694 if (flags & TRANSFER_SAVE_CCTXT)
695 { 956 {
696 if (!prev->stack) 957 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
697 allocate_stack (prev, 0); 958 SV **bot, **top;
698 else if (prev->cursp != stacklevel 959 AV *av = newAV (); /* return values */
699 && prev->stack->usecnt > 1) 960 SV **cb;
961 dSP;
962
963 GV *gv = CvGV (cx->blk_sub.cv);
964 SV *fullname = sv_2mortal (newSV (0));
965 if (isGV (gv))
966 gv_efullname3 (fullname, gv, 0);
967
968 bot = PL_stack_base + cx->blk_oldsp + 1;
969 top = cx->blk_gimme == G_ARRAY ? SP + 1
970 : cx->blk_gimme == G_SCALAR ? bot + 1
971 : bot;
972
973 av_extend (av, top - bot);
974 while (bot < top)
975 av_push (av, SvREFCNT_inc_NN (*bot++));
976
977 PL_runops = RUNOPS_DEFAULT;
978 ENTER;
979 SAVETMPS;
980 EXTEND (SP, 3);
981 PUSHMARK (SP);
982 PUSHs (&PL_sv_no);
983 PUSHs (fullname);
984 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
985 PUTBACK;
986 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
987 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
988 SPAGAIN;
989 FREETMPS;
990 LEAVE;
991 PL_runops = runops_trace;
992 }
993
994 if (oldcop != PL_curcop)
995 {
996 oldcop = PL_curcop;
997
998 if (PL_curcop != &PL_compiling)
700 { 999 {
701 prev->gencnt = ++prev->stack->gencnt; 1000 SV **cb;
702 prev->stack->usecnt = 1;
703 }
704 1001
705 /* has our stack been invalidated? */ 1002 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
706 if (next->stack && next->stack->gencnt != next->gencnt)
707 { 1003 {
708 deallocate_stack (next); 1004 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
709 allocate_stack (next, 1); 1005
710 coro_create (&(next->stack->cctx), 1006 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
711 continue_coro, (void *)next, 1007 {
712 next->stack->sptr, labs (next->stack->ssize)); 1008 runops_proc_t old_runops = PL_runops;
1009 dSP;
1010 GV *gv = CvGV (cx->blk_sub.cv);
1011 SV *fullname = sv_2mortal (newSV (0));
1012
1013 if (isGV (gv))
1014 gv_efullname3 (fullname, gv, 0);
1015
1016 PL_runops = RUNOPS_DEFAULT;
1017 ENTER;
1018 SAVETMPS;
1019 EXTEND (SP, 3);
1020 PUSHMARK (SP);
1021 PUSHs (&PL_sv_yes);
1022 PUSHs (fullname);
1023 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1024 PUTBACK;
1025 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1026 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1027 SPAGAIN;
1028 FREETMPS;
1029 LEAVE;
1030 PL_runops = runops_trace;
1031 }
1032
1033 oldcxix = cxstack_ix;
713 } 1034 }
714 1035
715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1036 if (cctx->flags & CC_TRACE_LINE)
716 prev->cursp = stacklevel;
717 /* don't add any code here */
718 }
719 else
720 next->cursp = stacklevel;
721 }
722 else if (next->tmps_ix == -2)
723 croak ("tried to transfer to running coroutine");
724 else
725 {
726 LOCK;
727 SAVE (prev, -1); /* first get rid of the old state */
728 UNLOCK;
729
730 /* create the coroutine for the first time */
731 if (flags & TRANSFER_SAVE_CCTXT)
732 {
733 if (!prev->stack)
734 allocate_stack (prev, 0);
735
736 /* the new coroutine starts with start_env again */
737 PL_top_env = &PL_start_env;
738
739 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
740 { 1037 {
741 setup_coro (next); 1038 dSP;
742 next->cursp = stacklevel;
743 1039
744 prev->stack->refcnt++; 1040 PL_runops = RUNOPS_DEFAULT;
745 prev->stack->usecnt++; 1041 ENTER;
746 next->stack = prev->stack; 1042 SAVETMPS;
747 next->gencnt = prev->gencnt; 1043 EXTEND (SP, 3);
1044 PL_runops = RUNOPS_DEFAULT;
1045 PUSHMARK (SP);
1046 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1047 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1048 PUTBACK;
1049 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1050 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1051 SPAGAIN;
1052 FREETMPS;
1053 LEAVE;
1054 PL_runops = runops_trace;
748 } 1055 }
749 else
750 {
751 assert (!next->stack);
752 allocate_stack (next, 1);
753 coro_create (&(next->stack->cctx),
754 setup_coro, (void *)next,
755 next->stack->sptr, labs (next->stack->ssize));
756 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
757 prev->cursp = stacklevel;
758 /* don't add any code here */
759 } 1056 }
760 } 1057 }
761 else
762 {
763 setup_coro (next);
764 next->cursp = stacklevel;
765 }
766 } 1058 }
767 } 1059 }
768 1060
769 LOCK; 1061 TAINT_NOT;
770 if (coro_mortal) 1062 return 0;
1063}
1064
1065static struct coro_cctx *cctx_ssl_cctx;
1066static struct CoroSLF cctx_ssl_frame;
1067
1068static void
1069slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1070{
1071 ta->prev = (struct coro *)cctx_ssl_cctx;
1072 ta->next = 0;
1073}
1074
1075static int
1076slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1077{
1078 *frame = cctx_ssl_frame;
1079
1080 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1081}
1082
1083/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1084static void NOINLINE
1085cctx_prepare (pTHX_ coro_cctx *cctx)
1086{
1087 PL_top_env = &PL_start_env;
1088
1089 if (cctx->flags & CC_TRACE)
1090 PL_runops = runops_trace;
1091
1092 /* we already must be executing an SLF op, there is no other valid way
1093 * that can lead to creation of a new cctx */
1094 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1095 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1096
1097 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1098 cctx_ssl_cctx = cctx;
1099 cctx_ssl_frame = slf_frame;
1100
1101 slf_frame.prepare = slf_prepare_set_stacklevel;
1102 slf_frame.check = slf_check_set_stacklevel;
1103}
1104
1105/* the tail of transfer: execute stuff we can only do after a transfer */
1106INLINE void
1107transfer_tail (pTHX)
1108{
1109 free_coro_mortal (aTHX);
1110}
1111
1112/*
1113 * this is a _very_ stripped down perl interpreter ;)
1114 */
1115static void
1116cctx_run (void *arg)
1117{
1118#ifdef USE_ITHREADS
1119# if CORO_PTHREAD
1120 PERL_SET_CONTEXT (coro_thx);
1121# endif
1122#endif
771 { 1123 {
772 SvREFCNT_dec (coro_mortal); 1124 dTHX;
773 coro_mortal = 0; 1125
1126 /* normally we would need to skip the entersub here */
1127 /* not doing so will re-execute it, which is exactly what we want */
1128 /* PL_nop = PL_nop->op_next */
1129
1130 /* inject a fake subroutine call to cctx_init */
1131 cctx_prepare (aTHX_ (coro_cctx *)arg);
1132
1133 /* cctx_run is the alternative tail of transfer() */
1134 transfer_tail (aTHX);
1135
1136 /* somebody or something will hit me for both perl_run and PL_restartop */
1137 PL_restartop = PL_op;
1138 perl_run (PL_curinterp);
1139
1140 /*
1141 * If perl-run returns we assume exit() was being called or the coro
1142 * fell off the end, which seems to be the only valid (non-bug)
1143 * reason for perl_run to return. We try to exit by jumping to the
1144 * bootstrap-time "top" top_env, as we cannot restore the "main"
1145 * coroutine as Coro has no such concept
1146 */
1147 PL_top_env = main_top_env;
1148 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1149 }
1150}
1151
1152static coro_cctx *
1153cctx_new ()
1154{
1155 coro_cctx *cctx;
1156
1157 ++cctx_count;
1158 New (0, cctx, 1, coro_cctx);
1159
1160 cctx->gen = cctx_gen;
1161 cctx->flags = 0;
1162 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1163
1164 return cctx;
1165}
1166
1167/* create a new cctx only suitable as source */
1168static coro_cctx *
1169cctx_new_empty ()
1170{
1171 coro_cctx *cctx = cctx_new ();
1172
1173 cctx->sptr = 0;
1174 coro_create (&cctx->cctx, 0, 0, 0, 0);
1175
1176 return cctx;
1177}
1178
1179/* create a new cctx suitable as destination/running a perl interpreter */
1180static coro_cctx *
1181cctx_new_run ()
1182{
1183 coro_cctx *cctx = cctx_new ();
1184 void *stack_start;
1185 size_t stack_size;
1186
1187#if HAVE_MMAP
1188 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1189 /* mmap supposedly does allocate-on-write for us */
1190 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1191
1192 if (cctx->sptr != (void *)-1)
774 } 1193 {
775 UNLOCK; 1194 #if CORO_STACKGUARD
776} 1195 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1196 #endif
1197 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1198 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1199 cctx->flags |= CC_MAPPED;
1200 }
1201 else
1202#endif
1203 {
1204 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1205 New (0, cctx->sptr, cctx_stacksize, long);
777 1206
778/* use this function pointer to call the above function */ 1207 if (!cctx->sptr)
779/* this is done to increase chances of the compiler not inlining the call */ 1208 {
780void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl; 1209 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1210 _exit (EXIT_FAILURE);
1211 }
781 1212
1213 stack_start = cctx->sptr;
1214 stack_size = cctx->ssize;
1215 }
1216
1217 #if CORO_USE_VALGRIND
1218 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1219 #endif
1220
1221 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1222
1223 return cctx;
1224}
1225
782static void 1226static void
783coro_state_destroy (struct coro *coro) 1227cctx_destroy (coro_cctx *cctx)
784{ 1228{
785 if (coro->refcnt--) 1229 if (!cctx)
786 return; 1230 return;
787 1231
1232 --cctx_count;
1233 coro_destroy (&cctx->cctx);
1234
1235 /* coro_transfer creates new, empty cctx's */
1236 if (cctx->sptr)
1237 {
1238 #if CORO_USE_VALGRIND
1239 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1240 #endif
1241
1242#if HAVE_MMAP
1243 if (cctx->flags & CC_MAPPED)
1244 munmap (cctx->sptr, cctx->ssize);
1245 else
1246#endif
1247 Safefree (cctx->sptr);
1248 }
1249
1250 Safefree (cctx);
1251}
1252
1253/* wether this cctx should be destructed */
1254#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1255
1256static coro_cctx *
1257cctx_get (pTHX)
1258{
1259 while (expect_true (cctx_first))
1260 {
1261 coro_cctx *cctx = cctx_first;
1262 cctx_first = cctx->next;
1263 --cctx_idle;
1264
1265 if (expect_true (!CCTX_EXPIRED (cctx)))
1266 return cctx;
1267
1268 cctx_destroy (cctx);
1269 }
1270
1271 return cctx_new_run ();
1272}
1273
1274static void
1275cctx_put (coro_cctx *cctx)
1276{
1277 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1278
1279 /* free another cctx if overlimit */
1280 if (expect_false (cctx_idle >= cctx_max_idle))
1281 {
1282 coro_cctx *first = cctx_first;
1283 cctx_first = first->next;
1284 --cctx_idle;
1285
1286 cctx_destroy (first);
1287 }
1288
1289 ++cctx_idle;
1290 cctx->next = cctx_first;
1291 cctx_first = cctx;
1292}
1293
1294/** coroutine switching *****************************************************/
1295
1296static void
1297transfer_check (pTHX_ struct coro *prev, struct coro *next)
1298{
1299 /* TODO: throwing up here is considered harmful */
1300
1301 if (expect_true (prev != next))
1302 {
1303 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1304 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1305
1306 if (expect_false (next->flags & CF_RUNNING))
1307 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1308
1309 if (expect_false (next->flags & CF_DESTROYED))
1310 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1311
1312#if !PERL_VERSION_ATLEAST (5,10,0)
1313 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1314 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1315#endif
1316 }
1317}
1318
1319/* always use the TRANSFER macro */
1320static void NOINLINE /* noinline so we have a fixed stackframe */
1321transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1322{
1323 dSTACKLEVEL;
1324
1325 /* sometimes transfer is only called to set idle_sp */
1326 if (expect_false (!next))
1327 {
1328 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1329 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1330 }
1331 else if (expect_true (prev != next))
1332 {
1333 coro_cctx *prev__cctx;
1334
1335 if (expect_false (prev->flags & CF_NEW))
1336 {
1337 /* create a new empty/source context */
1338 prev->cctx = cctx_new_empty ();
1339 prev->flags &= ~CF_NEW;
1340 prev->flags |= CF_RUNNING;
1341 }
1342
1343 prev->flags &= ~CF_RUNNING;
1344 next->flags |= CF_RUNNING;
1345
1346 /* first get rid of the old state */
1347 save_perl (aTHX_ prev);
1348
1349 if (expect_false (next->flags & CF_NEW))
1350 {
1351 /* need to start coroutine */
1352 next->flags &= ~CF_NEW;
1353 /* setup coroutine call */
1354 coro_setup (aTHX_ next);
1355 }
1356 else
1357 load_perl (aTHX_ next);
1358
1359 prev__cctx = prev->cctx;
1360
1361 /* possibly untie and reuse the cctx */
1362 if (expect_true (
1363 prev__cctx->idle_sp == STACKLEVEL
1364 && !(prev__cctx->flags & CC_TRACE)
1365 && !force_cctx
1366 ))
1367 {
1368 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1369 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1370
1371 prev->cctx = 0;
1372
1373 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1374 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1375 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1376 if (!next->cctx)
1377 next->cctx = cctx_get (aTHX);
1378
1379 cctx_put (prev__cctx);
1380 }
1381
1382 ++next->usecount;
1383
1384 if (expect_true (!next->cctx))
1385 next->cctx = cctx_get (aTHX);
1386
1387 if (expect_false (prev__cctx != next->cctx))
1388 {
1389 prev__cctx->top_env = PL_top_env;
1390 PL_top_env = next->cctx->top_env;
1391 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1392 }
1393
1394 transfer_tail (aTHX);
1395 }
1396}
1397
1398#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1399#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1400
1401/** high level stuff ********************************************************/
1402
1403static int
1404coro_state_destroy (pTHX_ struct coro *coro)
1405{
1406 if (coro->flags & CF_DESTROYED)
1407 return 0;
1408
1409 if (coro->on_destroy)
1410 coro->on_destroy (aTHX_ coro);
1411
1412 coro->flags |= CF_DESTROYED;
1413
1414 if (coro->flags & CF_READY)
1415 {
1416 /* reduce nready, as destroying a ready coro effectively unreadies it */
1417 /* alternative: look through all ready queues and remove the coro */
1418 --coro_nready;
1419 }
1420 else
1421 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1422
788 if (coro->mainstack && coro->mainstack != main_mainstack) 1423 if (coro->mainstack && coro->mainstack != main_mainstack)
789 { 1424 {
790 struct coro temp; 1425 struct coro temp;
791 1426
792 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1427 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1428
1429 save_perl (aTHX_ &temp);
793 LOAD (aTHX_ coro); 1430 load_perl (aTHX_ coro);
794 1431
795 destroy_stacks (aTHX); 1432 coro_destruct (aTHX_ coro);
796 1433
797 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1434 load_perl (aTHX_ &temp);
798 1435
799 coro->mainstack = 0; 1436 coro->slot = 0;
800 } 1437 }
801 1438
802 deallocate_stack (coro); 1439 cctx_destroy (coro->cctx);
803 SvREFCNT_dec (coro->args); 1440 SvREFCNT_dec (coro->args);
804 Safefree (coro); 1441
1442 if (coro->next) coro->next->prev = coro->prev;
1443 if (coro->prev) coro->prev->next = coro->next;
1444 if (coro == coro_first) coro_first = coro->next;
1445
1446 return 1;
805} 1447}
806 1448
807static int 1449static int
808coro_state_clear (SV *sv, MAGIC *mg) 1450coro_state_free (pTHX_ SV *sv, MAGIC *mg)
809{ 1451{
810 struct coro *coro = (struct coro *)mg->mg_ptr; 1452 struct coro *coro = (struct coro *)mg->mg_ptr;
811 mg->mg_ptr = 0; 1453 mg->mg_ptr = 0;
812 1454
1455 coro->hv = 0;
1456
1457 if (--coro->refcnt < 0)
1458 {
813 coro_state_destroy (coro); 1459 coro_state_destroy (aTHX_ coro);
1460 Safefree (coro);
1461 }
814 1462
815 return 0; 1463 return 0;
816} 1464}
817 1465
818static int 1466static int
819coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1467coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
820{ 1468{
821 struct coro *coro = (struct coro *)mg->mg_ptr; 1469 struct coro *coro = (struct coro *)mg->mg_ptr;
822 1470
823 ++coro->refcnt; 1471 ++coro->refcnt;
824 1472
825 return 0; 1473 return 0;
826} 1474}
827 1475
828static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 }; 1476static MGVTBL coro_state_vtbl = {
1477 0, 0, 0, 0,
1478 coro_state_free,
1479 0,
1480#ifdef MGf_DUP
1481 coro_state_dup,
1482#else
1483# define MGf_DUP 0
1484#endif
1485};
829 1486
830static struct coro *
831SvSTATE (SV *coro)
832{
833 HV *stash;
834 MAGIC *mg;
835
836 if (SvROK (coro))
837 coro = SvRV (coro);
838
839 stash = SvSTASH (coro);
840 if (stash != coro_stash && stash != coro_state_stash)
841 {
842 /* very slow, but rare, check */
843 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
844 croak ("Coro::State object required");
845 }
846
847 mg = SvMAGIC (coro);
848 assert (mg->mg_type == PERL_MAGIC_ext);
849 return (struct coro *)mg->mg_ptr;
850}
851
852static void 1487static void
1488prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1489{
1490 ta->prev = SvSTATE (prev_sv);
1491 ta->next = SvSTATE (next_sv);
1492 TRANSFER_CHECK (*ta);
1493}
1494
1495static void
853api_transfer (pTHX_ SV *prev, SV *next, int flags) 1496api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
854{ 1497{
855 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1498 struct coro_transfer_args ta;
1499
1500 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1501 TRANSFER (ta, 1);
1502}
1503
1504/*****************************************************************************/
1505/* gensub: simple closure generation utility */
1506
1507#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1508
1509/* create a closure from XS, returns a code reference */
1510/* the arg can be accessed via GENSUB_ARG from the callback */
1511/* the callback must use dXSARGS/XSRETURN */
1512static SV *
1513gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1514{
1515 CV *cv = (CV *)newSV (0);
1516
1517 sv_upgrade ((SV *)cv, SVt_PVCV);
1518
1519 CvANON_on (cv);
1520 CvISXSUB_on (cv);
1521 CvXSUB (cv) = xsub;
1522 GENSUB_ARG = arg;
1523
1524 return newRV_noinc ((SV *)cv);
856} 1525}
857 1526
858/** Coro ********************************************************************/ 1527/** Coro ********************************************************************/
859 1528
860#define PRIO_MAX 3 1529INLINE void
861#define PRIO_HIGH 1 1530coro_enq (pTHX_ struct coro *coro)
862#define PRIO_NORMAL 0 1531{
863#define PRIO_LOW -1 1532 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
864#define PRIO_IDLE -3 1533}
865#define PRIO_MIN -4
866 1534
867/* for Coro.pm */ 1535INLINE SV *
868static GV *coro_current, *coro_idle; 1536coro_deq (pTHX)
869static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870static int coro_nready;
871
872static void
873coro_enq (pTHX_ SV *sv)
874{ 1537{
875 int prio; 1538 int prio;
876 1539
877 if (SvTYPE (sv) != SVt_PVHV) 1540 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
878 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1541 if (AvFILLp (coro_ready [prio]) >= 0)
1542 return av_shift (coro_ready [prio]);
879 1543
880 prio = SvSTATE (sv)->prio; 1544 return 0;
1545}
881 1546
882 av_push (coro_ready [prio - PRIO_MIN], sv); 1547static int
1548api_ready (pTHX_ SV *coro_sv)
1549{
1550 struct coro *coro;
1551 SV *sv_hook;
1552 void (*xs_hook)(void);
1553
1554 if (SvROK (coro_sv))
1555 coro_sv = SvRV (coro_sv);
1556
1557 coro = SvSTATE (coro_sv);
1558
1559 if (coro->flags & CF_READY)
1560 return 0;
1561
1562 coro->flags |= CF_READY;
1563
1564 sv_hook = coro_nready ? 0 : coro_readyhook;
1565 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1566
1567 coro_enq (aTHX_ coro);
883 coro_nready++; 1568 ++coro_nready;
1569
1570 if (sv_hook)
1571 {
1572 dSP;
1573
1574 ENTER;
1575 SAVETMPS;
1576
1577 PUSHMARK (SP);
1578 PUTBACK;
1579 call_sv (sv_hook, G_VOID | G_DISCARD);
1580
1581 FREETMPS;
1582 LEAVE;
1583 }
1584
1585 if (xs_hook)
1586 xs_hook ();
1587
1588 return 1;
1589}
1590
1591static int
1592api_is_ready (pTHX_ SV *coro_sv)
1593{
1594 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1595}
1596
1597INLINE void
1598prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1599{
1600 SV *prev_sv, *next_sv;
1601
1602 for (;;)
1603 {
1604 next_sv = coro_deq (aTHX);
1605
1606 /* nothing to schedule: call the idle handler */
1607 if (expect_false (!next_sv))
1608 {
1609 dSP;
1610
1611 ENTER;
1612 SAVETMPS;
1613
1614 PUSHMARK (SP);
1615 PUTBACK;
1616 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1617
1618 FREETMPS;
1619 LEAVE;
1620 continue;
1621 }
1622
1623 ta->next = SvSTATE_hv (next_sv);
1624
1625 /* cannot transfer to destroyed coros, skip and look for next */
1626 if (expect_false (ta->next->flags & CF_DESTROYED))
1627 {
1628 SvREFCNT_dec (next_sv);
1629 /* coro_nready has already been taken care of by destroy */
1630 continue;
1631 }
1632
1633 --coro_nready;
1634 break;
1635 }
1636
1637 /* free this only after the transfer */
1638 prev_sv = SvRV (coro_current);
1639 ta->prev = SvSTATE_hv (prev_sv);
1640 TRANSFER_CHECK (*ta);
1641 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1642 ta->next->flags &= ~CF_READY;
1643 SvRV_set (coro_current, next_sv);
1644
1645 free_coro_mortal (aTHX);
1646 coro_mortal = prev_sv;
1647}
1648
1649INLINE void
1650prepare_cede (pTHX_ struct coro_transfer_args *ta)
1651{
1652 api_ready (aTHX_ coro_current);
1653 prepare_schedule (aTHX_ ta);
1654}
1655
1656INLINE void
1657prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1658{
1659 SV *prev = SvRV (coro_current);
1660
1661 if (coro_nready)
1662 {
1663 prepare_schedule (aTHX_ ta);
1664 api_ready (aTHX_ prev);
1665 }
1666 else
1667 prepare_nop (aTHX_ ta);
1668}
1669
1670static void
1671api_schedule (pTHX)
1672{
1673 struct coro_transfer_args ta;
1674
1675 prepare_schedule (aTHX_ &ta);
1676 TRANSFER (ta, 1);
1677}
1678
1679static int
1680api_cede (pTHX)
1681{
1682 struct coro_transfer_args ta;
1683
1684 prepare_cede (aTHX_ &ta);
1685
1686 if (expect_true (ta.prev != ta.next))
1687 {
1688 TRANSFER (ta, 1);
1689 return 1;
1690 }
1691 else
1692 return 0;
1693}
1694
1695static int
1696api_cede_notself (pTHX)
1697{
1698 if (coro_nready)
1699 {
1700 struct coro_transfer_args ta;
1701
1702 prepare_cede_notself (aTHX_ &ta);
1703 TRANSFER (ta, 1);
1704 return 1;
1705 }
1706 else
1707 return 0;
1708}
1709
1710static void
1711api_trace (pTHX_ SV *coro_sv, int flags)
1712{
1713 struct coro *coro = SvSTATE (coro_sv);
1714
1715 if (flags & CC_TRACE)
1716 {
1717 if (!coro->cctx)
1718 coro->cctx = cctx_new_run ();
1719 else if (!(coro->cctx->flags & CC_TRACE))
1720 croak ("cannot enable tracing on coroutine with custom stack,");
1721
1722 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1723 }
1724 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1725 {
1726 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1727
1728 if (coro->flags & CF_RUNNING)
1729 PL_runops = RUNOPS_DEFAULT;
1730 else
1731 coro->slot->runops = RUNOPS_DEFAULT;
1732 }
1733}
1734
1735/*****************************************************************************/
1736/* rouse callback */
1737
1738#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1739
1740static void
1741coro_rouse_callback (pTHX_ CV *cv)
1742{
1743 dXSARGS;
1744 SV *data = (SV *)GENSUB_ARG;
1745
1746 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1747 {
1748 /* first call, set args */
1749 int i;
1750 AV *av = newAV ();
1751 SV *coro = SvRV (data);
1752
1753 SvRV_set (data, (SV *)av);
1754 api_ready (aTHX_ coro);
1755 SvREFCNT_dec (coro);
1756
1757 /* better take a full copy of the arguments */
1758 while (items--)
1759 av_store (av, items, newSVsv (ST (items)));
1760 }
1761
1762 XSRETURN_EMPTY;
1763}
1764
1765static int
1766slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1767{
1768 SV *data = (SV *)frame->data;
1769
1770 if (CORO_THROW)
1771 return 0;
1772
1773 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1774 return 1;
1775
1776 /* now push all results on the stack */
1777 {
1778 dSP;
1779 AV *av = (AV *)SvRV (data);
1780 int i;
1781
1782 EXTEND (SP, AvFILLp (av) + 1);
1783 for (i = 0; i <= AvFILLp (av); ++i)
1784 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1785
1786 /* we have stolen the elements, so ste length to zero and free */
1787 AvFILLp (av) = -1;
1788 av_undef (av);
1789
1790 PUTBACK;
1791 }
1792
1793 return 0;
1794}
1795
1796static void
1797slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1798{
1799 SV *cb;
1800
1801 if (items)
1802 cb = arg [0];
1803 else
1804 {
1805 struct coro *coro = SvSTATE_current;
1806
1807 if (!coro->rouse_cb)
1808 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1809
1810 cb = sv_2mortal (coro->rouse_cb);
1811 coro->rouse_cb = 0;
1812 }
1813
1814 if (!SvROK (cb)
1815 || SvTYPE (SvRV (cb)) != SVt_PVCV
1816 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1817 croak ("Coro::rouse_wait called with illegal callback argument,");
1818
1819 {
1820 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1821 SV *data = (SV *)GENSUB_ARG;
1822
1823 frame->data = (void *)data;
1824 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1825 frame->check = slf_check_rouse_wait;
1826 }
884} 1827}
885 1828
886static SV * 1829static SV *
887coro_deq (pTHX_ int min_prio) 1830coro_new_rouse_cb (pTHX)
888{ 1831{
889 int prio = PRIO_MAX - PRIO_MIN; 1832 HV *hv = (HV *)SvRV (coro_current);
1833 struct coro *coro = SvSTATE_hv (hv);
1834 SV *data = newRV_inc ((SV *)hv);
1835 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
890 1836
891 min_prio -= PRIO_MIN; 1837 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
892 if (min_prio < 0) 1838 SvREFCNT_dec (data); /* magicext increases the refcount */
893 min_prio = 0;
894 1839
895 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1840 SvREFCNT_dec (coro->rouse_cb);
896 if (AvFILLp (coro_ready [prio]) >= 0) 1841 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1842
1843 return cb;
1844}
1845
1846/*****************************************************************************/
1847/* schedule-like-function opcode (SLF) */
1848
1849static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1850static const CV *slf_cv;
1851static SV **slf_argv;
1852static int slf_argc, slf_arga; /* count, allocated */
1853static I32 slf_ax; /* top of stack, for restore */
1854
1855/* this restores the stack in the case we patched the entersub, to */
1856/* recreate the stack frame as perl will on following calls */
1857/* since entersub cleared the stack */
1858static OP *
1859pp_restore (pTHX)
1860{
1861 int i;
1862 SV **SP = PL_stack_base + slf_ax;
1863
1864 PUSHMARK (SP);
1865
1866 EXTEND (SP, slf_argc + 1);
1867
1868 for (i = 0; i < slf_argc; ++i)
1869 PUSHs (sv_2mortal (slf_argv [i]));
1870
1871 PUSHs ((SV *)CvGV (slf_cv));
1872
1873 RETURNOP (slf_restore.op_first);
1874}
1875
1876static void
1877slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1878{
1879 SV **arg = (SV **)slf_frame.data;
1880
1881 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1882}
1883
1884static void
1885slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1886{
1887 if (items != 2)
1888 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1889
1890 frame->prepare = slf_prepare_transfer;
1891 frame->check = slf_check_nop;
1892 frame->data = (void *)arg; /* let's hope it will stay valid */
1893}
1894
1895static void
1896slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1897{
1898 frame->prepare = prepare_schedule;
1899 frame->check = slf_check_nop;
1900}
1901
1902static void
1903slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1904{
1905 frame->prepare = prepare_cede;
1906 frame->check = slf_check_nop;
1907}
1908
1909static void
1910slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1911{
1912 frame->prepare = prepare_cede_notself;
1913 frame->check = slf_check_nop;
1914}
1915
1916/*
1917 * these not obviously related functions are all rolled into one
1918 * function to increase chances that they all will call transfer with the same
1919 * stack offset
1920 * SLF stands for "schedule-like-function".
1921 */
1922static OP *
1923pp_slf (pTHX)
1924{
1925 I32 checkmark; /* mark SP to see how many elements check has pushed */
1926
1927 /* set up the slf frame, unless it has already been set-up */
1928 /* the latter happens when a new coro has been started */
1929 /* or when a new cctx was attached to an existing coroutine */
1930 if (expect_true (!slf_frame.prepare))
1931 {
1932 /* first iteration */
1933 dSP;
1934 SV **arg = PL_stack_base + TOPMARK + 1;
1935 int items = SP - arg; /* args without function object */
1936 SV *gv = *sp;
1937
1938 /* do a quick consistency check on the "function" object, and if it isn't */
1939 /* for us, divert to the real entersub */
1940 if (SvTYPE (gv) != SVt_PVGV
1941 || !GvCV (gv)
1942 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1943 return PL_ppaddr[OP_ENTERSUB](aTHX);
1944
1945 if (!(PL_op->op_flags & OPf_STACKED))
897 { 1946 {
898 coro_nready--; 1947 /* ampersand-form of call, use @_ instead of stack */
899 return av_shift (coro_ready [prio]); 1948 AV *av = GvAV (PL_defgv);
1949 arg = AvARRAY (av);
1950 items = AvFILLp (av) + 1;
900 } 1951 }
1952
1953 /* now call the init function, which needs to set up slf_frame */
1954 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1955 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1956
1957 /* pop args */
1958 SP = PL_stack_base + POPMARK;
1959
1960 PUTBACK;
1961 }
1962
1963 /* now that we have a slf_frame, interpret it! */
1964 /* we use a callback system not to make the code needlessly */
1965 /* complicated, but so we can run multiple perl coros from one cctx */
1966
1967 do
1968 {
1969 struct coro_transfer_args ta;
1970
1971 slf_frame.prepare (aTHX_ &ta);
1972 TRANSFER (ta, 0);
1973
1974 checkmark = PL_stack_sp - PL_stack_base;
1975 }
1976 while (slf_frame.check (aTHX_ &slf_frame));
1977
1978 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1979
1980 /* exception handling */
1981 if (expect_false (CORO_THROW))
1982 {
1983 SV *exception = sv_2mortal (CORO_THROW);
1984
1985 CORO_THROW = 0;
1986 sv_setsv (ERRSV, exception);
1987 croak (0);
1988 }
1989
1990 /* return value handling - mostly like entersub */
1991 /* make sure we put something on the stack in scalar context */
1992 if (GIMME_V == G_SCALAR)
1993 {
1994 dSP;
1995 SV **bot = PL_stack_base + checkmark;
1996
1997 if (sp == bot) /* too few, push undef */
1998 bot [1] = &PL_sv_undef;
1999 else if (sp != bot + 1) /* too many, take last one */
2000 bot [1] = *sp;
2001
2002 SP = bot + 1;
2003
2004 PUTBACK;
2005 }
2006
2007 return NORMAL;
2008}
2009
2010static void
2011api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2012{
2013 int i;
2014 SV **arg = PL_stack_base + ax;
2015 int items = PL_stack_sp - arg + 1;
2016
2017 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2018
2019 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2020 && PL_op->op_ppaddr != pp_slf)
2021 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2022
2023 CvFLAGS (cv) |= CVf_SLF;
2024 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2025 slf_cv = cv;
2026
2027 /* we patch the op, and then re-run the whole call */
2028 /* we have to put the same argument on the stack for this to work */
2029 /* and this will be done by pp_restore */
2030 slf_restore.op_next = (OP *)&slf_restore;
2031 slf_restore.op_type = OP_CUSTOM;
2032 slf_restore.op_ppaddr = pp_restore;
2033 slf_restore.op_first = PL_op;
2034
2035 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2036
2037 if (PL_op->op_flags & OPf_STACKED)
2038 {
2039 if (items > slf_arga)
2040 {
2041 slf_arga = items;
2042 free (slf_argv);
2043 slf_argv = malloc (slf_arga * sizeof (SV *));
2044 }
2045
2046 slf_argc = items;
2047
2048 for (i = 0; i < items; ++i)
2049 slf_argv [i] = SvREFCNT_inc (arg [i]);
2050 }
2051 else
2052 slf_argc = 0;
2053
2054 PL_op->op_ppaddr = pp_slf;
2055 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2056
2057 PL_op = (OP *)&slf_restore;
2058}
2059
2060/*****************************************************************************/
2061/* PerlIO::cede */
2062
2063typedef struct
2064{
2065 PerlIOBuf base;
2066 NV next, every;
2067} PerlIOCede;
2068
2069static IV
2070PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2071{
2072 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2073
2074 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2075 self->next = nvtime () + self->every;
2076
2077 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2078}
2079
2080static SV *
2081PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2082{
2083 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2084
2085 return newSVnv (self->every);
2086}
2087
2088static IV
2089PerlIOCede_flush (pTHX_ PerlIO *f)
2090{
2091 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2092 double now = nvtime ();
2093
2094 if (now >= self->next)
2095 {
2096 api_cede (aTHX);
2097 self->next = now + self->every;
2098 }
2099
2100 return PerlIOBuf_flush (aTHX_ f);
2101}
2102
2103static PerlIO_funcs PerlIO_cede =
2104{
2105 sizeof(PerlIO_funcs),
2106 "cede",
2107 sizeof(PerlIOCede),
2108 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2109 PerlIOCede_pushed,
2110 PerlIOBuf_popped,
2111 PerlIOBuf_open,
2112 PerlIOBase_binmode,
2113 PerlIOCede_getarg,
2114 PerlIOBase_fileno,
2115 PerlIOBuf_dup,
2116 PerlIOBuf_read,
2117 PerlIOBuf_unread,
2118 PerlIOBuf_write,
2119 PerlIOBuf_seek,
2120 PerlIOBuf_tell,
2121 PerlIOBuf_close,
2122 PerlIOCede_flush,
2123 PerlIOBuf_fill,
2124 PerlIOBase_eof,
2125 PerlIOBase_error,
2126 PerlIOBase_clearerr,
2127 PerlIOBase_setlinebuf,
2128 PerlIOBuf_get_base,
2129 PerlIOBuf_bufsiz,
2130 PerlIOBuf_get_ptr,
2131 PerlIOBuf_get_cnt,
2132 PerlIOBuf_set_ptrcnt,
2133};
2134
2135/*****************************************************************************/
2136/* Coro::Semaphore & Coro::Signal */
2137
2138static SV *
2139coro_waitarray_new (pTHX_ int count)
2140{
2141 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2142 AV *av = newAV ();
2143 SV **ary;
2144
2145 /* unfortunately, building manually saves memory */
2146 Newx (ary, 2, SV *);
2147 AvALLOC (av) = ary;
2148 /*AvARRAY (av) = ary;*/
2149 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2150 AvMAX (av) = 1;
2151 AvFILLp (av) = 0;
2152 ary [0] = newSViv (count);
2153
2154 return newRV_noinc ((SV *)av);
2155}
2156
2157/* semaphore */
2158
2159static void
2160coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2161{
2162 SV *count_sv = AvARRAY (av)[0];
2163 IV count = SvIVX (count_sv);
2164
2165 count += adjust;
2166 SvIVX (count_sv) = count;
2167
2168 /* now wake up as many waiters as are expected to lock */
2169 while (count > 0 && AvFILLp (av) > 0)
2170 {
2171 SV *cb;
2172
2173 /* swap first two elements so we can shift a waiter */
2174 AvARRAY (av)[0] = AvARRAY (av)[1];
2175 AvARRAY (av)[1] = count_sv;
2176 cb = av_shift (av);
2177
2178 if (SvOBJECT (cb))
2179 api_ready (aTHX_ cb);
2180 else
2181 croak ("callbacks not yet supported");
2182
2183 SvREFCNT_dec (cb);
2184
2185 --count;
2186 }
2187}
2188
2189static void
2190coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2191{
2192 /* call $sem->adjust (0) to possibly wake up some other waiters */
2193 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2194}
2195
2196static int
2197slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2198{
2199 AV *av = (AV *)frame->data;
2200 SV *count_sv = AvARRAY (av)[0];
2201
2202 /* if we are about to throw, don't actually acquire the lock, just throw */
2203 if (CORO_THROW)
2204 return 0;
2205 else if (SvIVX (count_sv) > 0)
2206 {
2207 SvSTATE_current->on_destroy = 0;
2208
2209 if (acquire)
2210 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2211 else
2212 coro_semaphore_adjust (aTHX_ av, 0);
2213
2214 return 0;
2215 }
2216 else
2217 {
2218 int i;
2219 /* if we were woken up but can't down, we look through the whole */
2220 /* waiters list and only add us if we aren't in there already */
2221 /* this avoids some degenerate memory usage cases */
2222
2223 for (i = 1; i <= AvFILLp (av); ++i)
2224 if (AvARRAY (av)[i] == SvRV (coro_current))
2225 return 1;
2226
2227 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2228 return 1;
2229 }
2230}
2231
2232static int
2233slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2234{
2235 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2236}
2237
2238static int
2239slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2240{
2241 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2242}
2243
2244static void
2245slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2246{
2247 AV *av = (AV *)SvRV (arg [0]);
2248
2249 if (SvIVX (AvARRAY (av)[0]) > 0)
2250 {
2251 frame->data = (void *)av;
2252 frame->prepare = prepare_nop;
2253 }
2254 else
2255 {
2256 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2257
2258 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2259 frame->prepare = prepare_schedule;
2260
2261 /* to avoid race conditions when a woken-up coro gets terminated */
2262 /* we arrange for a temporary on_destroy that calls adjust (0) */
2263 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2264 }
2265}
2266
2267static void
2268slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2269{
2270 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2271 frame->check = slf_check_semaphore_down;
2272}
2273
2274static void
2275slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2276{
2277 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2278 frame->check = slf_check_semaphore_wait;
2279}
2280
2281/* signal */
2282
2283static void
2284coro_signal_wake (pTHX_ AV *av, int count)
2285{
2286 SvIVX (AvARRAY (av)[0]) = 0;
2287
2288 /* now signal count waiters */
2289 while (count > 0 && AvFILLp (av) > 0)
2290 {
2291 SV *cb;
2292
2293 /* swap first two elements so we can shift a waiter */
2294 cb = AvARRAY (av)[0];
2295 AvARRAY (av)[0] = AvARRAY (av)[1];
2296 AvARRAY (av)[1] = cb;
2297
2298 cb = av_shift (av);
2299
2300 api_ready (aTHX_ cb);
2301 sv_setiv (cb, 0); /* signal waiter */
2302 SvREFCNT_dec (cb);
2303
2304 --count;
2305 }
2306}
2307
2308static int
2309slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2310{
2311 /* if we are about to throw, also stop waiting */
2312 return SvROK ((SV *)frame->data) && !CORO_THROW;
2313}
2314
2315static void
2316slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2317{
2318 AV *av = (AV *)SvRV (arg [0]);
2319
2320 if (SvIVX (AvARRAY (av)[0]))
2321 {
2322 SvIVX (AvARRAY (av)[0]) = 0;
2323 frame->prepare = prepare_nop;
2324 frame->check = slf_check_nop;
2325 }
2326 else
2327 {
2328 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2329
2330 av_push (av, waiter);
2331
2332 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2333 frame->prepare = prepare_schedule;
2334 frame->check = slf_check_signal_wait;
2335 }
2336}
2337
2338/*****************************************************************************/
2339/* Coro::AIO */
2340
2341#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2342
2343/* helper storage struct */
2344struct io_state
2345{
2346 int errorno;
2347 I32 laststype; /* U16 in 5.10.0 */
2348 int laststatval;
2349 Stat_t statcache;
2350};
2351
2352static void
2353coro_aio_callback (pTHX_ CV *cv)
2354{
2355 dXSARGS;
2356 AV *state = (AV *)GENSUB_ARG;
2357 SV *coro = av_pop (state);
2358 SV *data_sv = newSV (sizeof (struct io_state));
2359
2360 av_extend (state, items);
2361
2362 sv_upgrade (data_sv, SVt_PV);
2363 SvCUR_set (data_sv, sizeof (struct io_state));
2364 SvPOK_only (data_sv);
2365
2366 {
2367 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2368
2369 data->errorno = errno;
2370 data->laststype = PL_laststype;
2371 data->laststatval = PL_laststatval;
2372 data->statcache = PL_statcache;
2373 }
2374
2375 /* now build the result vector out of all the parameters and the data_sv */
2376 {
2377 int i;
2378
2379 for (i = 0; i < items; ++i)
2380 av_push (state, SvREFCNT_inc_NN (ST (i)));
2381 }
2382
2383 av_push (state, data_sv);
2384
2385 api_ready (aTHX_ coro);
2386 SvREFCNT_dec (coro);
2387 SvREFCNT_dec ((AV *)state);
2388}
2389
2390static int
2391slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2392{
2393 AV *state = (AV *)frame->data;
2394
2395 /* if we are about to throw, return early */
2396 /* this does not cancel the aio request, but at least */
2397 /* it quickly returns */
2398 if (CORO_THROW)
2399 return 0;
2400
2401 /* one element that is an RV? repeat! */
2402 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2403 return 1;
2404
2405 /* restore status */
2406 {
2407 SV *data_sv = av_pop (state);
2408 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2409
2410 errno = data->errorno;
2411 PL_laststype = data->laststype;
2412 PL_laststatval = data->laststatval;
2413 PL_statcache = data->statcache;
2414
2415 SvREFCNT_dec (data_sv);
2416 }
2417
2418 /* push result values */
2419 {
2420 dSP;
2421 int i;
2422
2423 EXTEND (SP, AvFILLp (state) + 1);
2424 for (i = 0; i <= AvFILLp (state); ++i)
2425 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2426
2427 PUTBACK;
2428 }
901 2429
902 return 0; 2430 return 0;
903} 2431}
904 2432
905static void 2433static void
906api_ready (SV *coro) 2434slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
907{ 2435{
908 dTHX; 2436 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
909
910 if (SvROK (coro))
911 coro = SvRV (coro);
912
913 LOCK;
914 coro_enq (aTHX_ SvREFCNT_inc (coro));
915 UNLOCK;
916}
917
918static void
919api_schedule (void)
920{
921 dTHX;
922
923 SV *prev, *next;
924 SV *current = GvSV (coro_current); 2437 SV *coro_hv = SvRV (coro_current);
2438 struct coro *coro = SvSTATE_hv (coro_hv);
925 2439
926 for (;;) 2440 /* put our coroutine id on the state arg */
927 { 2441 av_push (state, SvREFCNT_inc_NN (coro_hv));
928 LOCK;
929 2442
930 next = coro_deq (aTHX_ PRIO_MIN); 2443 /* first see whether we have a non-zero priority and set it as AIO prio */
931 2444 if (coro->prio)
932 if (next)
933 break;
934
935 UNLOCK;
936
937 { 2445 {
938 dSP; 2446 dSP;
939 2447
940 ENTER; 2448 static SV *prio_cv;
941 SAVETMPS; 2449 static SV *prio_sv;
942 2450
2451 if (expect_false (!prio_cv))
2452 {
2453 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2454 prio_sv = newSViv (0);
2455 }
2456
943 PUSHMARK (SP); 2457 PUSHMARK (SP);
2458 sv_setiv (prio_sv, coro->prio);
2459 XPUSHs (prio_sv);
2460
944 PUTBACK; 2461 PUTBACK;
945 call_sv (GvSV (coro_idle), G_DISCARD); 2462 call_sv (prio_cv, G_VOID | G_DISCARD);
946
947 FREETMPS;
948 LEAVE;
949 } 2463 }
2464
2465 /* now call the original request */
2466 {
2467 dSP;
2468 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2469 int i;
2470
2471 PUSHMARK (SP);
2472
2473 /* first push all args to the stack */
2474 EXTEND (SP, items + 1);
2475
2476 for (i = 0; i < items; ++i)
2477 PUSHs (arg [i]);
2478
2479 /* now push the callback closure */
2480 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2481
2482 /* now call the AIO function - we assume our request is uncancelable */
2483 PUTBACK;
2484 call_sv ((SV *)req, G_VOID | G_DISCARD);
950 } 2485 }
951 2486
952 prev = SvRV (current); 2487 /* now that the requets is going, we loop toll we have a result */
953 SvRV (current) = next; 2488 frame->data = (void *)state;
954 2489 frame->prepare = prepare_schedule;
955 /* free this only after the transfer */ 2490 frame->check = slf_check_aio_req;
956 coro_mortal = prev;
957
958 UNLOCK;
959
960 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
961 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
962} 2491}
963 2492
964static void 2493static void
965api_cede (void) 2494coro_aio_req_xs (pTHX_ CV *cv)
966{ 2495{
967 dTHX; 2496 dXSARGS;
968 2497
969 LOCK; 2498 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
970 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
971 UNLOCK;
972 2499
973 api_schedule (); 2500 XSRETURN_EMPTY;
974} 2501}
975 2502
2503/*****************************************************************************/
2504
976MODULE = Coro::State PACKAGE = Coro::State 2505MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977 2506
978PROTOTYPES: DISABLE 2507PROTOTYPES: DISABLE
979 2508
980BOOT: 2509BOOT:
981{ 2510{
982#ifdef USE_ITHREADS 2511#ifdef USE_ITHREADS
983 MUTEX_INIT (&coro_mutex); 2512# if CORO_PTHREAD
2513 coro_thx = PERL_GET_CONTEXT;
2514# endif
984#endif 2515#endif
985 BOOT_PAGESIZE; 2516 BOOT_PAGESIZE;
986 2517
2518 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2519 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2520
2521 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2522 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2523 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2524
2525 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2526 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2527 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2528
987 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2529 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
988 2530
989 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2531 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
990 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2532 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
991 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2533 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
992 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2534 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
993 2535
994 main_mainstack = PL_mainstack; 2536 main_mainstack = PL_mainstack;
2537 main_top_env = PL_top_env;
995 2538
2539 while (main_top_env->je_prev)
2540 main_top_env = main_top_env->je_prev;
2541
2542 {
2543 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2544
2545 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2546 hv_store_ent (PL_custom_op_names, slf,
2547 newSVpv ("coro_slf", 0), 0);
2548
2549 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2550 hv_store_ent (PL_custom_op_descs, slf,
2551 newSVpv ("coro schedule like function", 0), 0);
2552 }
2553
996 coroapi.ver = CORO_API_VERSION; 2554 coroapi.ver = CORO_API_VERSION;
2555 coroapi.rev = CORO_API_REVISION;
2556
997 coroapi.transfer = api_transfer; 2557 coroapi.transfer = api_transfer;
2558
2559 coroapi.sv_state = SvSTATE_;
2560 coroapi.execute_slf = api_execute_slf;
2561 coroapi.prepare_nop = prepare_nop;
2562 coroapi.prepare_schedule = prepare_schedule;
2563 coroapi.prepare_cede = prepare_cede;
2564 coroapi.prepare_cede_notself = prepare_cede_notself;
2565
2566 {
2567 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2568
2569 if (!svp) croak ("Time::HiRes is required");
2570 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2571
2572 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2573 }
998 2574
999 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2575 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1000} 2576}
1001 2577
1002SV * 2578SV *
1003new (char *klass, ...) 2579new (char *klass, ...)
1004 CODE: 2580 CODE:
1005{ 2581{
1006 struct coro *coro; 2582 struct coro *coro;
2583 MAGIC *mg;
1007 HV *hv; 2584 HV *hv;
1008 int i; 2585 int i;
1009 2586
1010 Newz (0, coro, 1, struct coro); 2587 Newz (0, coro, 1, struct coro);
1011 coro->args = newAV (); 2588 coro->args = newAV ();
2589 coro->flags = CF_NEW;
1012 2590
2591 if (coro_first) coro_first->prev = coro;
2592 coro->next = coro_first;
2593 coro_first = coro;
2594
2595 coro->hv = hv = newHV ();
2596 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2597 mg->mg_flags |= MGf_DUP;
2598 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2599
2600 av_extend (coro->args, items - 1);
1013 for (i = 1; i < items; i++) 2601 for (i = 1; i < items; i++)
1014 av_push (coro->args, newSVsv (ST (i))); 2602 av_push (coro->args, newSVsv (ST (i)));
1015
1016 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1017 /*coro->stack = 0;*/
1018
1019 hv = newHV ();
1020 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1021 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1022} 2603}
1023 OUTPUT: 2604 OUTPUT:
1024 RETVAL 2605 RETVAL
1025 2606
1026void 2607void
1027transfer(prev, next, flags) 2608transfer (...)
1028 SV *prev 2609 PROTOTYPE: $$
1029 SV *next 2610 CODE:
1030 int flags 2611 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1031 CODE:
1032 PUTBACK;
1033 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1034 SPAGAIN;
1035 2612
1036int 2613bool
1037prio (Coro::State coro, int newprio = 0) 2614_destroy (SV *coro_sv)
1038 ALIAS: 2615 CODE:
1039 nice = 1 2616 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1040 CODE: 2617 OUTPUT:
1041{ 2618 RETVAL
1042 RETVAL = coro->prio;
1043
1044 if (items > 1)
1045 {
1046 if (ix)
1047 newprio += coro->prio;
1048
1049 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1050 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1051
1052 coro->prio = newprio;
1053 }
1054}
1055 2619
1056void 2620void
1057_clone_state_from (SV *dst, SV *src)
1058 CODE:
1059{
1060 struct coro *coro_src = SvSTATE (src);
1061
1062 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1063
1064 ++coro_src->refcnt;
1065 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1066}
1067
1068void
1069_exit (code) 2621_exit (int code)
1070 int code
1071 PROTOTYPE: $ 2622 PROTOTYPE: $
1072 CODE: 2623 CODE:
1073 _exit (code); 2624 _exit (code);
1074 2625
1075MODULE = Coro::State PACKAGE = Coro::Cont 2626int
2627cctx_stacksize (int new_stacksize = 0)
2628 PROTOTYPE: ;$
2629 CODE:
2630 RETVAL = cctx_stacksize;
2631 if (new_stacksize)
2632 {
2633 cctx_stacksize = new_stacksize;
2634 ++cctx_gen;
2635 }
2636 OUTPUT:
2637 RETVAL
2638
2639int
2640cctx_max_idle (int max_idle = 0)
2641 PROTOTYPE: ;$
2642 CODE:
2643 RETVAL = cctx_max_idle;
2644 if (max_idle > 1)
2645 cctx_max_idle = max_idle;
2646 OUTPUT:
2647 RETVAL
2648
2649int
2650cctx_count ()
2651 PROTOTYPE:
2652 CODE:
2653 RETVAL = cctx_count;
2654 OUTPUT:
2655 RETVAL
2656
2657int
2658cctx_idle ()
2659 PROTOTYPE:
2660 CODE:
2661 RETVAL = cctx_idle;
2662 OUTPUT:
2663 RETVAL
1076 2664
1077void 2665void
1078yield (...) 2666list ()
1079 PROTOTYPE: @ 2667 PROTOTYPE:
2668 PPCODE:
2669{
2670 struct coro *coro;
2671 for (coro = coro_first; coro; coro = coro->next)
2672 if (coro->hv)
2673 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2674}
2675
2676void
2677call (Coro::State coro, SV *coderef)
2678 ALIAS:
2679 eval = 1
2680 CODE:
2681{
2682 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2683 {
2684 struct coro temp;
2685
2686 if (!(coro->flags & CF_RUNNING))
2687 {
2688 PUTBACK;
2689 save_perl (aTHX_ &temp);
2690 load_perl (aTHX_ coro);
2691 }
2692
2693 {
2694 dSP;
2695 ENTER;
2696 SAVETMPS;
2697 PUTBACK;
2698 PUSHSTACK;
2699 PUSHMARK (SP);
2700
2701 if (ix)
2702 eval_sv (coderef, 0);
2703 else
2704 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2705
2706 POPSTACK;
2707 SPAGAIN;
2708 FREETMPS;
2709 LEAVE;
2710 PUTBACK;
2711 }
2712
2713 if (!(coro->flags & CF_RUNNING))
2714 {
2715 save_perl (aTHX_ coro);
2716 load_perl (aTHX_ &temp);
2717 SPAGAIN;
2718 }
2719 }
2720}
2721
2722SV *
2723is_ready (Coro::State coro)
2724 PROTOTYPE: $
2725 ALIAS:
2726 is_ready = CF_READY
2727 is_running = CF_RUNNING
2728 is_new = CF_NEW
2729 is_destroyed = CF_DESTROYED
2730 CODE:
2731 RETVAL = boolSV (coro->flags & ix);
2732 OUTPUT:
2733 RETVAL
2734
2735void
2736throw (Coro::State self, SV *throw = &PL_sv_undef)
2737 PROTOTYPE: $;$
1080 CODE: 2738 CODE:
1081{ 2739{
1082 SV *yieldstack; 2740 struct coro *current = SvSTATE_current;
1083 SV *sv; 2741 SV **throwp = self == current ? &CORO_THROW : &self->except;
1084 AV *defav = GvAV (PL_defgv); 2742 SvREFCNT_dec (*throwp);
1085 struct coro *prev, *next; 2743 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2744}
1086 2745
1087 yieldstack = *hv_fetch ( 2746void
1088 (HV *)SvRV (GvSV (coro_current)), 2747api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1089 "yieldstack", sizeof ("yieldstack") - 1, 2748 PROTOTYPE: $;$
2749 C_ARGS: aTHX_ coro, flags
2750
2751SV *
2752has_cctx (Coro::State coro)
2753 PROTOTYPE: $
2754 CODE:
2755 RETVAL = boolSV (!!coro->cctx);
2756 OUTPUT:
2757 RETVAL
2758
2759int
2760is_traced (Coro::State coro)
2761 PROTOTYPE: $
2762 CODE:
2763 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2764 OUTPUT:
2765 RETVAL
2766
2767UV
2768rss (Coro::State coro)
2769 PROTOTYPE: $
2770 ALIAS:
2771 usecount = 1
2772 CODE:
2773 switch (ix)
2774 {
2775 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2776 case 1: RETVAL = coro->usecount; break;
1090 0 2777 }
2778 OUTPUT:
2779 RETVAL
2780
2781void
2782force_cctx ()
2783 PROTOTYPE:
2784 CODE:
2785 SvSTATE_current->cctx->idle_sp = 0;
2786
2787void
2788swap_defsv (Coro::State self)
2789 PROTOTYPE: $
2790 ALIAS:
2791 swap_defav = 1
2792 CODE:
2793 if (!self->slot)
2794 croak ("cannot swap state with coroutine that has no saved state,");
2795 else
1091 ); 2796 {
2797 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2798 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1092 2799
1093 /* set up @_ -- ugly */ 2800 SV *tmp = *src; *src = *dst; *dst = tmp;
1094 av_clear (defav); 2801 }
1095 av_fill (defav, items - 1);
1096 while (items--)
1097 av_store (defav, items, SvREFCNT_inc (ST(items)));
1098 2802
1099 sv = av_pop ((AV *)SvRV (yieldstack));
1100 prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1101 next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1102 SvREFCNT_dec (sv);
1103
1104 coro_state_transfer (aTHX_ prev, next, 0);
1105}
1106 2803
1107MODULE = Coro::State PACKAGE = Coro 2804MODULE = Coro::State PACKAGE = Coro
1108 2805
1109BOOT: 2806BOOT:
1110{ 2807{
1111 int i; 2808 int i;
1112 2809
2810 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2811 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2812 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2813
2814 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2815 SvREADONLY_on (coro_current);
2816
1113 coro_stash = gv_stashpv ("Coro", TRUE); 2817 coro_stash = gv_stashpv ("Coro", TRUE);
1114 2818
1115 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2819 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1116 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2820 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1117 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2821 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1118 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2822 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1119 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2823 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1120 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2824 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1121 2825
1122 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1123 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1124
1125 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2826 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1126 coro_ready[i] = newAV (); 2827 coro_ready[i] = newAV ();
1127 2828
1128 { 2829 {
1129 SV *sv = perl_get_sv("Coro::API", 1); 2830 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1130 2831
1131 coroapi.schedule = api_schedule; 2832 coroapi.schedule = api_schedule;
1132 coroapi.cede = api_cede; 2833 coroapi.cede = api_cede;
2834 coroapi.cede_notself = api_cede_notself;
1133 coroapi.ready = api_ready; 2835 coroapi.ready = api_ready;
2836 coroapi.is_ready = api_is_ready;
1134 coroapi.nready = &coro_nready; 2837 coroapi.nready = coro_nready;
1135 coroapi.current = coro_current; 2838 coroapi.current = coro_current;
1136 2839
1137 GCoroAPI = &coroapi; 2840 /*GCoroAPI = &coroapi;*/
1138 sv_setiv (sv, (IV)&coroapi); 2841 sv_setiv (sv, (IV)&coroapi);
1139 SvREADONLY_on (sv); 2842 SvREADONLY_on (sv);
1140 } 2843 }
1141} 2844}
1142 2845
1143#if !PERL_MICRO
1144
1145void 2846void
1146ready (self) 2847schedule (...)
1147 SV * self 2848 CODE:
2849 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2850
2851void
2852cede (...)
2853 CODE:
2854 CORO_EXECUTE_SLF_XS (slf_init_cede);
2855
2856void
2857cede_notself (...)
2858 CODE:
2859 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2860
2861void
2862_set_current (SV *current)
1148 PROTOTYPE: $ 2863 PROTOTYPE: $
1149 CODE: 2864 CODE:
1150 api_ready (self); 2865 SvREFCNT_dec (SvRV (coro_current));
2866 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1151 2867
1152#endif 2868void
2869_set_readyhook (SV *hook)
2870 PROTOTYPE: $
2871 CODE:
2872 SvREFCNT_dec (coro_readyhook);
2873 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2874
2875int
2876prio (Coro::State coro, int newprio = 0)
2877 PROTOTYPE: $;$
2878 ALIAS:
2879 nice = 1
2880 CODE:
2881{
2882 RETVAL = coro->prio;
2883
2884 if (items > 1)
2885 {
2886 if (ix)
2887 newprio = coro->prio - newprio;
2888
2889 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2890 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2891
2892 coro->prio = newprio;
2893 }
2894}
2895 OUTPUT:
2896 RETVAL
2897
2898SV *
2899ready (SV *self)
2900 PROTOTYPE: $
2901 CODE:
2902 RETVAL = boolSV (api_ready (aTHX_ self));
2903 OUTPUT:
2904 RETVAL
1153 2905
1154int 2906int
1155nready (...) 2907nready (...)
1156 PROTOTYPE: 2908 PROTOTYPE:
1157 CODE: 2909 CODE:
1158 RETVAL = coro_nready; 2910 RETVAL = coro_nready;
1159 OUTPUT: 2911 OUTPUT:
1160 RETVAL 2912 RETVAL
1161 2913
2914# for async_pool speedup
1162void 2915void
1163schedule (...) 2916_pool_1 (SV *cb)
1164 PROTOTYPE:
1165 CODE: 2917 CODE:
1166 api_schedule (); 2918{
2919 HV *hv = (HV *)SvRV (coro_current);
2920 struct coro *coro = SvSTATE_hv ((SV *)hv);
2921 AV *defav = GvAV (PL_defgv);
2922 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2923 AV *invoke_av;
2924 int i, len;
2925
2926 if (!invoke)
2927 {
2928 SV *old = PL_diehook;
2929 PL_diehook = 0;
2930 SvREFCNT_dec (old);
2931 croak ("\3async_pool terminate\2\n");
2932 }
2933
2934 SvREFCNT_dec (coro->saved_deffh);
2935 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2936
2937 hv_store (hv, "desc", sizeof ("desc") - 1,
2938 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2939
2940 invoke_av = (AV *)SvRV (invoke);
2941 len = av_len (invoke_av);
2942
2943 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2944
2945 if (len > 0)
2946 {
2947 av_fill (defav, len - 1);
2948 for (i = 0; i < len; ++i)
2949 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2950 }
2951}
1167 2952
1168void 2953void
1169cede (...) 2954_pool_2 (SV *cb)
1170 PROTOTYPE:
1171 CODE: 2955 CODE:
1172 api_cede (); 2956{
2957 HV *hv = (HV *)SvRV (coro_current);
2958 struct coro *coro = SvSTATE_hv ((SV *)hv);
1173 2959
1174# and these are hacks 2960 sv_setsv (cb, &PL_sv_undef);
2961
2962 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2963 coro->saved_deffh = 0;
2964
2965 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2966 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2967 {
2968 SV *old = PL_diehook;
2969 PL_diehook = 0;
2970 SvREFCNT_dec (old);
2971 croak ("\3async_pool terminate\2\n");
2972 }
2973
2974 av_clear (GvAV (PL_defgv));
2975 hv_store (hv, "desc", sizeof ("desc") - 1,
2976 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2977
2978 coro->prio = 0;
2979
2980 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2981 api_trace (aTHX_ coro_current, 0);
2982
2983 av_push (av_async_pool, newSVsv (coro_current));
2984}
2985
1175SV * 2986SV *
1176_aio_get_state () 2987rouse_cb ()
2988 PROTOTYPE:
1177 CODE: 2989 CODE:
1178{ 2990 RETVAL = coro_new_rouse_cb (aTHX);
1179 struct {
1180 int errorno;
1181 int laststype;
1182 int laststatval;
1183 Stat_t statcache;
1184 } data;
1185
1186 data.errorno = errno;
1187 data.laststype = PL_laststype;
1188 data.laststatval = PL_laststatval;
1189 data.statcache = PL_statcache;
1190
1191 RETVAL = newSVpvn ((char *)&data, sizeof data);
1192}
1193 OUTPUT: 2991 OUTPUT:
1194 RETVAL 2992 RETVAL
1195 2993
1196void 2994void
1197_aio_set_state (char *data_) 2995rouse_wait (SV *cb = 0)
1198 PROTOTYPE: $ 2996 PROTOTYPE: ;$
2997 PPCODE:
2998 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
2999
3000
3001MODULE = Coro::State PACKAGE = PerlIO::cede
3002
3003BOOT:
3004 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3005
3006
3007MODULE = Coro::State PACKAGE = Coro::Semaphore
3008
3009SV *
3010new (SV *klass, SV *count = 0)
1199 CODE: 3011 CODE:
3012 RETVAL = sv_bless (
3013 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3014 GvSTASH (CvGV (cv))
3015 );
3016 OUTPUT:
3017 RETVAL
3018
3019# helper for Coro::Channel
3020SV *
3021_alloc (int count)
3022 CODE:
3023 RETVAL = coro_waitarray_new (aTHX_ count);
3024 OUTPUT:
3025 RETVAL
3026
3027SV *
3028count (SV *self)
3029 CODE:
3030 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3031 OUTPUT:
3032 RETVAL
3033
3034void
3035up (SV *self, int adjust = 1)
3036 ALIAS:
3037 adjust = 1
3038 CODE:
3039 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3040
3041void
3042down (SV *self)
3043 CODE:
3044 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3045
3046void
3047wait (SV *self)
3048 CODE:
3049 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3050
3051void
3052try (SV *self)
3053 PPCODE:
1200{ 3054{
1201 struct { 3055 AV *av = (AV *)SvRV (self);
3056 SV *count_sv = AvARRAY (av)[0];
3057 IV count = SvIVX (count_sv);
3058
3059 if (count > 0)
3060 {
3061 --count;
3062 SvIVX (count_sv) = count;
3063 XSRETURN_YES;
3064 }
3065 else
3066 XSRETURN_NO;
3067}
3068
3069void
3070waiters (SV *self)
3071 PPCODE:
3072{
3073 AV *av = (AV *)SvRV (self);
3074 int wcount = AvFILLp (av) + 1 - 1;
3075
3076 if (GIMME_V == G_SCALAR)
3077 XPUSHs (sv_2mortal (newSViv (wcount)));
3078 else
3079 {
1202 int errorno; 3080 int i;
1203 int laststype; 3081 EXTEND (SP, wcount);
1204 int laststatval; 3082 for (i = 1; i <= wcount; ++i)
1205 Stat_t statcache; 3083 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1206 } *data = (void *)data_; 3084 }
1207
1208 errno = data->errorno;
1209 PL_laststype = data->laststype;
1210 PL_laststatval = data->laststatval;
1211 PL_statcache = data->statcache;
1212} 3085}
3086
3087MODULE = Coro::State PACKAGE = Coro::Signal
3088
3089SV *
3090new (SV *klass)
3091 CODE:
3092 RETVAL = sv_bless (
3093 coro_waitarray_new (aTHX_ 0),
3094 GvSTASH (CvGV (cv))
3095 );
3096 OUTPUT:
3097 RETVAL
3098
3099void
3100wait (SV *self)
3101 CODE:
3102 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3103
3104void
3105broadcast (SV *self)
3106 CODE:
3107{
3108 AV *av = (AV *)SvRV (self);
3109 coro_signal_wake (aTHX_ av, AvFILLp (av));
3110}
3111
3112void
3113send (SV *self)
3114 CODE:
3115{
3116 AV *av = (AV *)SvRV (self);
3117
3118 if (AvFILLp (av))
3119 coro_signal_wake (aTHX_ av, 1);
3120 else
3121 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3122}
3123
3124IV
3125awaited (SV *self)
3126 CODE:
3127 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3128 OUTPUT:
3129 RETVAL
3130
3131
3132MODULE = Coro::State PACKAGE = Coro::AnyEvent
3133
3134BOOT:
3135 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3136
3137void
3138_schedule (...)
3139 CODE:
3140{
3141 static int incede;
3142
3143 api_cede_notself (aTHX);
3144
3145 ++incede;
3146 while (coro_nready >= incede && api_cede (aTHX))
3147 ;
3148
3149 sv_setsv (sv_activity, &PL_sv_undef);
3150 if (coro_nready >= incede)
3151 {
3152 PUSHMARK (SP);
3153 PUTBACK;
3154 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3155 }
3156
3157 --incede;
3158}
3159
3160
3161MODULE = Coro::State PACKAGE = Coro::AIO
3162
3163void
3164_register (char *target, char *proto, SV *req)
3165 CODE:
3166{
3167 HV *st;
3168 GV *gvp;
3169 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
3170 /* newXSproto doesn't return the CV on 5.8 */
3171 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3172 sv_setpv ((SV *)slf_cv, proto);
3173 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3174}
3175

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines