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Comparing Coro/Coro/State.xs (file contents):
Revision 1.87 by root, Fri Nov 24 13:40:36 2006 UTC vs.
Revision 1.306 by root, Wed Nov 19 11:11:10 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#define UCORO_STATE "_coro_state"
64 159
65/* The next macro should declare a variable stacklevel that contains and approximation 160/* we hijack an hopefully unused CV flag for our purposes */
66 * to the current C stack pointer. Its property is that it changes with each call 161#define CVf_SLF 0x4000
67 * and should be unique. */ 162static OP *pp_slf (pTHX);
68#define dSTACKLEVEL void *stacklevel = &stacklevel
69 163
70#define IN_DESTRUCT (PL_main_cv == Nullcv) 164static U32 cctx_gen;
71 165static size_t cctx_stacksize = CORO_STACKSIZE;
72#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74#include "CoroAPI.h"
75
76#ifdef USE_ITHREADS
77static perl_mutex coro_mutex;
78# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80#else
81# define LOCK (void)0
82# define UNLOCK (void)0
83#endif
84
85static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
86static 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;
87static HV *coro_state_stash; 169static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
91 171
92/* 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 */
93typedef struct { 199typedef struct coro_cctx
94 int refcnt; /* pointer reference counter */ 200{
95 int usecnt; /* shared by how many coroutines */ 201 struct coro_cctx *next;
96 int gencnt; /* generation counter */
97 202
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;
98 coro_context cctx; 211 coro_context cctx;
99 212
100 void *sptr; 213 U32 gen;
101 long ssize; /* positive == mmap, otherwise malloc */ 214#if CORO_USE_VALGRIND
102} coro_stack; 215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
103 219
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 */
104struct coro { 242struct coro {
105 /* the optional C context */ 243 /* the C coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 244 coro_cctx *cctx;
107 void *cursp;
108 int gencnt;
109 245
110 /* optionally saved, might be zero */ 246 /* state data */
111 AV *defav; 247 struct CoroSLF slf_frame; /* saved slf frame */
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118
119 /* the stacks and related info (callchain etc..) */
120 PERL_SI *curstackinfo;
121 AV *curstack;
122 AV *mainstack; 248 AV *mainstack;
123 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
124 OP *op; 250
125 SV **curpad; 251 AV *args; /* data associated with this coroutine (initial args) */
126 AV *comppad; 252 int refcnt; /* coroutines are refcounted, yes */
127 CV *compcv; 253 int flags; /* CF_ flags */
128 SV **stack_base; 254 HV *hv; /* the perl hash associated with this coro, if any */
129 SV **stack_max; 255 void (*on_destroy)(pTHX_ struct coro *coro);
130 SV **tmps_stack; 256
131 I32 tmps_floor; 257 /* statistics */
132 I32 tmps_ix; 258 int usecount; /* number of transfers to this coro */
133 I32 tmps_max;
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 JMPENV *top_env;
149 259
150 /* coro process data */ 260 /* coro process data */
151 int prio; 261 int prio;
262 SV *except; /* exception to be thrown */
263 SV *rouse_cb;
152 264
153 /* data associated with this coroutine (initial args) */ 265 /* async_pool */
154 AV *args; 266 SV *saved_deffh;
155 int refcnt; 267
268 /* linked list */
269 struct coro *next, *prev;
156}; 270};
157 271
158typedef struct coro *Coro__State; 272typedef struct coro *Coro__State;
159typedef struct coro *Coro__State_or_hashref; 273typedef struct coro *Coro__State_or_hashref;
160 274
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
161static AV * 328static AV *
162coro_clone_padlist (pTHX_ CV *cv) 329coro_clone_padlist (pTHX_ CV *cv)
163{ 330{
164 AV *padlist = CvPADLIST (cv); 331 AV *padlist = CvPADLIST (cv);
165 AV *newpadlist, *newpad; 332 AV *newpadlist, *newpad;
166 333
167 newpadlist = newAV (); 334 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 335 AvREAL_off (newpadlist);
169#if PERL_VERSION < 9 336#if PERL_VERSION_ATLEAST (5,10,0)
337 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
338#else
170 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 339 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173#endif 340#endif
174 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 341 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175 --AvFILLp (padlist); 342 --AvFILLp (padlist);
176 343
177 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 344 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
178 av_store (newpadlist, 1, (SV *)newpad); 345 av_store (newpadlist, 1, (SV *)newpad);
179 346
180 return newpadlist; 347 return newpadlist;
181} 348}
182 349
… …
212 379
213 /* casting is fun. */ 380 /* casting is fun. */
214 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 381 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215 free_padlist (aTHX_ padlist); 382 free_padlist (aTHX_ padlist);
216 383
217 SvREFCNT_dec (av); 384 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
218 385
219 return 0; 386 return 0;
220} 387}
221 388
389#define CORO_MAGIC_type_cv 26
222#define PERL_MAGIC_coro PERL_MAGIC_ext 390#define CORO_MAGIC_type_state PERL_MAGIC_ext
223 391
224static 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))
225 439
226/* the next two functions merely cache the padlists */ 440/* the next two functions merely cache the padlists */
227static void 441static void
228get_padlist (pTHX_ CV *cv) 442get_padlist (pTHX_ CV *cv)
229{ 443{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 444 MAGIC *mg = CORO_MAGIC_cv (cv);
445 AV *av;
231 446
232 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 447 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
233 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 448 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234 else 449 else
235 { 450 {
236#if 0 451#if CORO_PREFER_PERL_FUNCTIONS
237 /* this should work - but it doesn't :( */ 452 /* this is probably cleaner? but also slower! */
453 /* in practise, it seems to be less stable */
238 CV *cp = Perl_cv_clone (aTHX_ cv); 454 CV *cp = Perl_cv_clone (aTHX_ cv);
239 CvPADLIST (cv) = CvPADLIST (cp); 455 CvPADLIST (cv) = CvPADLIST (cp);
240 CvPADLIST (cp) = 0; 456 CvPADLIST (cp) = 0;
241 SvREFCNT_dec (cp); 457 SvREFCNT_dec (cp);
242#else 458#else
… …
246} 462}
247 463
248static void 464static void
249put_padlist (pTHX_ CV *cv) 465put_padlist (pTHX_ CV *cv)
250{ 466{
251 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 467 MAGIC *mg = CORO_MAGIC_cv (cv);
468 AV *av;
252 469
253 if (!mg) 470 if (expect_false (!mg))
254 { 471 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
255 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257 mg->mg_virtual = &vtbl_coro;
258 mg->mg_obj = (SV *)newAV ();
259 }
260 472
261 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 473 av = (AV *)mg->mg_obj;
262}
263 474
264#define SB do { 475 if (expect_false (AvFILLp (av) >= AvMAX (av)))
265#define SE } while (0) 476 av_extend (av, AvMAX (av) + 1);
266 477
267#define LOAD(state) load_state(aTHX_ (state)); 478 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
268#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 479}
269 480
270#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 481/** load & save, init *******************************************************/
271 482
272static void 483static void
273load_state(pTHX_ Coro__State c) 484load_perl (pTHX_ Coro__State c)
274{ 485{
275 PL_dowarn = c->dowarn; 486 perl_slots *slot = c->slot;
276 PL_in_eval = c->in_eval; 487 c->slot = 0;
277 488
278 PL_curstackinfo = c->curstackinfo;
279 PL_curstack = c->curstack;
280 PL_mainstack = c->mainstack; 489 PL_mainstack = c->mainstack;
281 PL_stack_sp = c->stack_sp;
282 PL_op = c->op;
283 PL_curpad = c->curpad;
284 PL_comppad = c->comppad;
285 PL_compcv = c->compcv;
286 PL_stack_base = c->stack_base;
287 PL_stack_max = c->stack_max;
288 PL_tmps_stack = c->tmps_stack;
289 PL_tmps_floor = c->tmps_floor;
290 PL_tmps_ix = c->tmps_ix;
291 PL_tmps_max = c->tmps_max;
292 PL_markstack = c->markstack;
293 PL_markstack_ptr = c->markstack_ptr;
294 PL_markstack_max = c->markstack_max;
295 PL_scopestack = c->scopestack;
296 PL_scopestack_ix = c->scopestack_ix;
297 PL_scopestack_max = c->scopestack_max;
298 PL_savestack = c->savestack;
299 PL_savestack_ix = c->savestack_ix;
300 PL_savestack_max = c->savestack_max;
301#if PERL_VERSION < 9
302 PL_retstack = c->retstack;
303 PL_retstack_ix = c->retstack_ix;
304 PL_retstack_max = c->retstack_max;
305#endif
306 PL_curpm = c->curpm;
307 PL_curcop = c->curcop;
308 PL_top_env = c->top_env;
309 490
310 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 491 GvSV (PL_defgv) = slot->defsv;
311 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 492 GvAV (PL_defgv) = slot->defav;
312 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
313 499
314 { 500 {
315 dSP; 501 dSP;
502
316 CV *cv; 503 CV *cv;
317 504
318 /* now do the ugly restore mess */ 505 /* now do the ugly restore mess */
319 while ((cv = (CV *)POPs)) 506 while (expect_true (cv = (CV *)POPs))
320 { 507 {
321 AV *padlist = (AV *)POPs;
322
323 if (padlist)
324 {
325 put_padlist (aTHX_ cv); /* mark this padlist as available */ 508 put_padlist (aTHX_ cv); /* mark this padlist as available */
326 CvPADLIST(cv) = padlist; 509 CvDEPTH (cv) = PTR2IV (POPs);
327 } 510 CvPADLIST (cv) = (AV *)POPs;
328
329 ++CvDEPTH(cv);
330 } 511 }
331 512
332 PUTBACK; 513 PUTBACK;
333 } 514 }
334}
335 515
516 slf_frame = c->slf_frame;
517 CORO_THROW = c->except;
518}
519
336static void 520static void
337save_state(pTHX_ Coro__State c, int flags) 521save_perl (pTHX_ Coro__State c)
338{ 522{
523 c->except = CORO_THROW;
524 c->slf_frame = slf_frame;
525
339 { 526 {
340 dSP; 527 dSP;
341 I32 cxix = cxstack_ix; 528 I32 cxix = cxstack_ix;
342 PERL_CONTEXT *ccstk = cxstack; 529 PERL_CONTEXT *ccstk = cxstack;
343 PERL_SI *top_si = PL_curstackinfo; 530 PERL_SI *top_si = PL_curstackinfo;
… …
345 /* 532 /*
346 * 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
347 * (and reinitialize) all cv's in the whole callchain :( 534 * (and reinitialize) all cv's in the whole callchain :(
348 */ 535 */
349 536
350 PUSHs (Nullsv); 537 XPUSHs (Nullsv);
351 /* this loop was inspired by pp_caller */ 538 /* this loop was inspired by pp_caller */
352 for (;;) 539 for (;;)
353 { 540 {
354 while (cxix >= 0) 541 while (expect_true (cxix >= 0))
355 { 542 {
356 PERL_CONTEXT *cx = &ccstk[cxix--]; 543 PERL_CONTEXT *cx = &ccstk[cxix--];
357 544
358 if (CxTYPE(cx) == CXt_SUB) 545 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
359 { 546 {
360 CV *cv = cx->blk_sub.cv; 547 CV *cv = cx->blk_sub.cv;
548
361 if (CvDEPTH(cv)) 549 if (expect_true (CvDEPTH (cv)))
362 { 550 {
363 EXTEND (SP, CvDEPTH(cv)*2); 551 EXTEND (SP, 3);
364
365 while (--CvDEPTH(cv))
366 {
367 /* this tells the restore code to increment CvDEPTH */
368 PUSHs (Nullsv);
369 PUSHs ((SV *)cv);
370 }
371
372 PUSHs ((SV *)CvPADLIST(cv)); 552 PUSHs ((SV *)CvPADLIST (cv));
553 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
373 PUSHs ((SV *)cv); 554 PUSHs ((SV *)cv);
374 555
556 CvDEPTH (cv) = 0;
375 get_padlist (aTHX_ cv); 557 get_padlist (aTHX_ cv);
376 } 558 }
377 } 559 }
378#ifdef CXt_FORMAT
379 else if (CxTYPE(cx) == CXt_FORMAT)
380 {
381 /* I never used formats, so how should I know how these are implemented? */
382 /* my bold guess is as a simple, plain sub... */
383 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384 }
385#endif
386 } 560 }
387 561
388 if (top_si->si_type == PERLSI_MAIN) 562 if (expect_true (top_si->si_type == PERLSI_MAIN))
389 break; 563 break;
390 564
391 top_si = top_si->si_prev; 565 top_si = top_si->si_prev;
392 ccstk = top_si->si_cxstack; 566 ccstk = top_si->si_cxstack;
393 cxix = top_si->si_cxix; 567 cxix = top_si->si_cxix;
394 } 568 }
395 569
396 PUTBACK; 570 PUTBACK;
397 } 571 }
398 572
399 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 573 /* allocate some space on the context stack for our purposes */
400 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 574 /* we manually unroll here, as usually 2 slots is enough */
401 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 */
402 584
403 c->dowarn = PL_dowarn;
404 c->in_eval = PL_in_eval;
405
406 c->curstackinfo = PL_curstackinfo;
407 c->curstack = PL_curstack;
408 c->mainstack = PL_mainstack; 585 c->mainstack = PL_mainstack;
409 c->stack_sp = PL_stack_sp; 586
410 c->op = PL_op; 587 {
411 c->curpad = PL_curpad; 588 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
412 c->comppad = PL_comppad; 589
413 c->compcv = PL_compcv; 590 slot->defav = GvAV (PL_defgv);
414 c->stack_base = PL_stack_base; 591 slot->defsv = DEFSV;
415 c->stack_max = PL_stack_max; 592 slot->errsv = ERRSV;
416 c->tmps_stack = PL_tmps_stack; 593 slot->irsgv = GvSV (irsgv);
417 c->tmps_floor = PL_tmps_floor; 594
418 c->tmps_ix = PL_tmps_ix; 595 #define VAR(name,type) slot->name = PL_ ## name;
419 c->tmps_max = PL_tmps_max; 596 # include "state.h"
420 c->markstack = PL_markstack; 597 #undef VAR
421 c->markstack_ptr = PL_markstack_ptr; 598 }
422 c->markstack_max = PL_markstack_max;
423 c->scopestack = PL_scopestack;
424 c->scopestack_ix = PL_scopestack_ix;
425 c->scopestack_max = PL_scopestack_max;
426 c->savestack = PL_savestack;
427 c->savestack_ix = PL_savestack_ix;
428 c->savestack_max = PL_savestack_max;
429#if PERL_VERSION < 9
430 c->retstack = PL_retstack;
431 c->retstack_ix = PL_retstack_ix;
432 c->retstack_max = PL_retstack_max;
433#endif
434 c->curpm = PL_curpm;
435 c->curcop = PL_curcop;
436 c->top_env = PL_top_env;
437} 599}
438 600
439/* 601/*
440 * allocate various perl stacks. This is an exact copy 602 * allocate various perl stacks. This is almost an exact copy
441 * of perl.c:init_stacks, except that it uses less memory 603 * of perl.c:init_stacks, except that it uses less memory
442 * on the (sometimes correct) assumption that coroutines do 604 * on the (sometimes correct) assumption that coroutines do
443 * not usually need a lot of stackspace. 605 * not usually need a lot of stackspace.
444 */ 606 */
607#if CORO_PREFER_PERL_FUNCTIONS
608# define coro_init_stacks(thx) init_stacks ()
609#else
445static void 610static void
446coro_init_stacks (pTHX) 611coro_init_stacks (pTHX)
447{ 612{
448 LOCK; 613 PL_curstackinfo = new_stackinfo(32, 8);
449
450 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451 PL_curstackinfo->si_type = PERLSI_MAIN; 614 PL_curstackinfo->si_type = PERLSI_MAIN;
452 PL_curstack = PL_curstackinfo->si_stack; 615 PL_curstack = PL_curstackinfo->si_stack;
453 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 616 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454 617
455 PL_stack_base = AvARRAY(PL_curstack); 618 PL_stack_base = AvARRAY(PL_curstack);
456 PL_stack_sp = PL_stack_base; 619 PL_stack_sp = PL_stack_base;
457 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 620 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458 621
459 New(50,PL_tmps_stack,96,SV*); 622 New(50,PL_tmps_stack,32,SV*);
460 PL_tmps_floor = -1; 623 PL_tmps_floor = -1;
461 PL_tmps_ix = -1; 624 PL_tmps_ix = -1;
462 PL_tmps_max = 96; 625 PL_tmps_max = 32;
463 626
464 New(54,PL_markstack,16,I32); 627 New(54,PL_markstack,16,I32);
465 PL_markstack_ptr = PL_markstack; 628 PL_markstack_ptr = PL_markstack;
466 PL_markstack_max = PL_markstack + 16; 629 PL_markstack_max = PL_markstack + 16;
467 630
468#ifdef SET_MARK_OFFSET 631#ifdef SET_MARK_OFFSET
469 SET_MARK_OFFSET; 632 SET_MARK_OFFSET;
470#endif 633#endif
471 634
472 New(54,PL_scopestack,16,I32); 635 New(54,PL_scopestack,8,I32);
473 PL_scopestack_ix = 0; 636 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16; 637 PL_scopestack_max = 8;
475 638
476 New(54,PL_savestack,96,ANY); 639 New(54,PL_savestack,24,ANY);
477 PL_savestack_ix = 0; 640 PL_savestack_ix = 0;
478 PL_savestack_max = 96; 641 PL_savestack_max = 24;
479 642
480#if PERL_VERSION < 9 643#if !PERL_VERSION_ATLEAST (5,10,0)
481 New(54,PL_retstack,8,OP*); 644 New(54,PL_retstack,4,OP*);
482 PL_retstack_ix = 0; 645 PL_retstack_ix = 0;
483 PL_retstack_max = 8; 646 PL_retstack_max = 4;
484#endif 647#endif
485
486 UNLOCK;
487} 648}
649#endif
488 650
489/* 651/*
490 * destroy the stacks, the callchain etc... 652 * destroy the stacks, the callchain etc...
491 */ 653 */
492static void 654static void
493destroy_stacks(pTHX) 655coro_destruct_stacks (pTHX)
494{ 656{
495 if (!IN_DESTRUCT)
496 {
497 /* is this ugly, I ask? */
498 LEAVE_SCOPE (0);
499
500 /* sure it is, but more important: is it correct?? :/ */
501 FREETMPS;
502
503 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
504 }
505
506 while (PL_curstackinfo->si_next) 657 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 658 PL_curstackinfo = PL_curstackinfo->si_next;
508 659
509 while (PL_curstackinfo) 660 while (PL_curstackinfo)
510 { 661 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 662 PERL_SI *p = PL_curstackinfo->si_prev;
512 663
513 { /*D*//*remove*/
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (!IN_DESTRUCT) 664 if (!IN_DESTRUCT)
520 {
521 dounwind (-1);/*D*//*remove*/
522 SvREFCNT_dec (PL_curstackinfo->si_stack); 665 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 }
524 666
525 Safefree (PL_curstackinfo->si_cxstack); 667 Safefree (PL_curstackinfo->si_cxstack);
526 Safefree (PL_curstackinfo); 668 Safefree (PL_curstackinfo);
527 PL_curstackinfo = p; 669 PL_curstackinfo = p;
528 } 670 }
529 671
530 Safefree (PL_tmps_stack); 672 Safefree (PL_tmps_stack);
531 Safefree (PL_markstack); 673 Safefree (PL_markstack);
532 Safefree (PL_scopestack); 674 Safefree (PL_scopestack);
533 Safefree (PL_savestack); 675 Safefree (PL_savestack);
534#if PERL_VERSION < 9 676#if !PERL_VERSION_ATLEAST (5,10,0)
535 Safefree (PL_retstack); 677 Safefree (PL_retstack);
536#endif 678#endif
537} 679}
538 680
539static void 681static size_t
540allocate_stack (Coro__State ctx, int alloc) 682coro_rss (pTHX_ struct coro *coro)
541{ 683{
542 coro_stack *stack; 684 size_t rss = sizeof (*coro);
543 685
544 New (0, stack, 1, coro_stack); 686 if (coro->mainstack)
545
546 stack->refcnt = 1;
547 stack->usecnt = 1;
548 stack->gencnt = ctx->gencnt = 0;
549
550 if (alloc)
551 { 687 {
552#if HAVE_MMAP 688 perl_slots tmp_slot;
553 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */ 689 perl_slots *slot;
554 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 690
555 if (stack->sptr != (void *)-1) 691 if (coro->flags & CF_RUNNING)
556 { 692 {
557# if STACKGUARD 693 slot = &tmp_slot;
558 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 694
559# endif 695 #define VAR(name,type) slot->name = PL_ ## name;
696 # include "state.h"
697 #undef VAR
560 } 698 }
561 else 699 else
562#endif 700 slot = coro->slot;
701
702 if (slot)
563 { 703 {
564 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 704 rss += sizeof (slot->curstackinfo);
565 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
566 } 715 }
567 } 716 }
568 else
569 stack->sptr = 0;
570 717
571 ctx->stack = stack; 718 return rss;
572} 719}
573 720
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 */
574static void 743static int
575deallocate_stack (Coro__State ctx) 744coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
576{ 745{
577 coro_stack *stack = ctx->stack; 746 const char *s = MgPV_nolen_const (mg);
578 747
579 ctx->stack = 0; 748 if (*s == '_')
580
581 if (stack)
582 { 749 {
583 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)
584 { 756 {
585#ifdef HAVE_MMAP 757 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
586 if (stack->ssize > 0 && stack->sptr) 758 return 0;
587 munmap (stack->sptr, stack->ssize);
588 else
589#endif
590 Safefree (stack->sptr);
591
592 Safefree (stack);
593 } 759 }
594 else if (ctx->gencnt == stack->gencnt) 760 }
595 --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 == '_')
596 } 771 {
597} 772 SV **svp = 0;
598 773
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
599static void 789static int
600setup_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)
601{ 830{
602 /* 831 /*
603 * emulate part of the perl startup here. 832 * emulate part of the perl startup here.
604 */ 833 */
605 dTHX;
606 dSP;
607 Coro__State ctx = (Coro__State)arg;
608 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
609
610 coro_init_stacks (aTHX); 834 coro_init_stacks (aTHX);
611 /*PL_curcop = 0;*/ 835
612 /*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));
613 SvREFCNT_dec (GvAV (PL_defgv)); 915 SvREFCNT_dec (GvAV (PL_defgv));
614 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));
615 920
616 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);
617 927
618 if (ctx->stack) 928 coro_destruct_stacks (aTHX);
619 { 929}
620 ctx->cursp = 0;
621 930
622 PUSHMARK(SP); 931INLINE void
623 PUTBACK; 932free_coro_mortal (pTHX)
624 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 933{
625 934 if (expect_true (coro_mortal))
626 if (SvTRUE (ERRSV))
627 croak (NULL);
628 else
629 croak ("FATAL: CCTXT coroutine returned!");
630 } 935 {
631 else 936 SvREFCNT_dec (coro_mortal);
937 coro_mortal = 0;
632 { 938 }
633 UNOP myop; 939}
634 940
635 Zero(&myop, 1, UNOP); 941static int
636 myop.op_next = Nullop; 942runops_trace (pTHX)
637 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;
638 948
639 PL_op = (OP *)&myop; 949 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
640
641 PUSHMARK(SP);
642 XPUSHs (sub_init);
643 /*
644 * the next line is slightly wrong, as PL_op->op_next
645 * is actually being executed so we skip the first op.
646 * that doesn't matter, though, since it is only
647 * pp_nextstate and we never return...
648 * ah yes, and I don't care anyways ;)
649 */
650 PUTBACK;
651 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652 SPAGAIN;
653
654 ENTER; /* necessary e.g. for dounwind */
655 } 950 {
656} 951 PERL_ASYNC_CHECK ();
657 952
658static void 953 if (cctx->flags & CC_TRACE_ALL)
659continue_coro (void *arg)
660{
661 /*
662 * this is a _very_ stripped down perl interpreter ;)
663 */
664 dTHX;
665 Coro__State ctx = (Coro__State)arg;
666
667 PL_top_env = &PL_start_env;
668
669 ctx->cursp = 0;
670 PL_op = PL_op->op_next;
671 CALLRUNOPS(aTHX);
672
673 abort ();
674}
675
676/* never call directly, always through the coro_state_transfer global variable */
677static void
678transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
679{
680 dSTACKLEVEL;
681
682 if (prev != next)
683 {
684 /* has this coro been created yet? */
685 if (next->mainstack)
686 { 954 {
687 LOCK; 955 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
688 SAVE (prev, flags);
689 LOAD (next);
690 UNLOCK;
691
692 /* mark this state as in-use */
693 next->mainstack = 0;
694 next->tmps_ix = -2;
695
696 /* stacklevel changed? if yes, grab the stack for us! */
697 if (flags & TRANSFER_SAVE_CCTXT)
698 { 956 {
699 if (!prev->stack) 957 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
700 allocate_stack (prev, 0); 958 SV **bot, **top;
701 else if (prev->cursp != stacklevel 959 AV *av = newAV (); /* return values */
702 && 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)
703 { 999 {
704 prev->gencnt = ++prev->stack->gencnt; 1000 SV **cb;
705 prev->stack->usecnt = 1;
706 }
707 1001
708 /* has our stack been invalidated? */ 1002 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
709 if (next->stack && next->stack->gencnt != next->gencnt)
710 { 1003 {
711 deallocate_stack (next); 1004 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
712 allocate_stack (next, 1); 1005
713 coro_create (&(next->stack->cctx), 1006 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
714 continue_coro, (void *)next, 1007 {
715 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;
716 } 1034 }
717 1035
718 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1036 if (cctx->flags & CC_TRACE_LINE)
719 prev->cursp = stacklevel;
720 /* don't add any code here */
721 }
722 else
723 next->cursp = stacklevel;
724 }
725 else if (next->tmps_ix == -2)
726 croak ("tried to transfer to running coroutine");
727 else
728 {
729 LOCK;
730 SAVE (prev, -1); /* first get rid of the old state */
731 UNLOCK;
732
733 /* create the coroutine for the first time */
734 if (flags & TRANSFER_SAVE_CCTXT)
735 {
736 if (!prev->stack)
737 allocate_stack (prev, 0);
738
739 /* the new coroutine starts with start_env again */
740 PL_top_env = &PL_start_env;
741
742 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
743 { 1037 {
744 setup_coro (next); 1038 dSP;
745 next->cursp = stacklevel;
746 1039
747 prev->stack->refcnt++; 1040 PL_runops = RUNOPS_DEFAULT;
748 prev->stack->usecnt++; 1041 ENTER;
749 next->stack = prev->stack; 1042 SAVETMPS;
750 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;
751 } 1055 }
752 else
753 {
754 assert (!next->stack);
755 allocate_stack (next, 1);
756 coro_create (&(next->stack->cctx),
757 setup_coro, (void *)next,
758 next->stack->sptr, labs (next->stack->ssize));
759 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
760 prev->cursp = stacklevel;
761 /* don't add any code here */
762 } 1056 }
763 } 1057 }
764 else
765 {
766 setup_coro (next);
767 next->cursp = stacklevel;
768 }
769 } 1058 }
770 } 1059 }
771 1060
772 LOCK; 1061 TAINT_NOT;
773 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
774 { 1123 {
775 SvREFCNT_dec (coro_mortal); 1124 dTHX;
776 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)
777 } 1193 {
778 UNLOCK; 1194 #if CORO_STACKGUARD
779} 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);
780 1206
781/* use this function pointer to call the above function */ 1207 if (!cctx->sptr)
782/* this is done to increase chances of the compiler not inlining the call */ 1208 {
783void (*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 }
784 1212
785#define SV_CORO(sv,func) \ 1213 stack_start = cctx->sptr;
786 do { \ 1214 stack_size = cctx->ssize;
787 if (SvROK (sv)) \ 1215 }
788 sv = SvRV (sv); \
789 \
790 if (SvTYPE (sv) == SVt_PVHV && SvSTASH (sv) != coro_state_stash) \
791 { \
792 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
793 \
794 if (!he) \
795 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
796 \
797 (sv) = SvRV (HeVAL(he)); \
798 } \
799 \
800 /* must also be changed inside Coro::Cont::yield */ \
801 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
802 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
803 \
804 } while(0)
805 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
806static void 1226static void
807coro_state_destroy (struct coro *coro) 1227cctx_destroy (coro_cctx *cctx)
808{ 1228{
809 if (coro->refcnt--) 1229 if (!cctx)
810 return; 1230 return;
811 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
812 if (coro->mainstack && coro->mainstack != main_mainstack) 1423 if (coro->mainstack && coro->mainstack != main_mainstack)
813 { 1424 {
814 struct coro temp; 1425 struct coro temp;
815 1426
816 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);
817 LOAD (aTHX_ coro); 1430 load_perl (aTHX_ coro);
818 1431
819 destroy_stacks (aTHX); 1432 coro_destruct (aTHX_ coro);
820 1433
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1434 load_perl (aTHX_ &temp);
822 1435
823 coro->mainstack = 0; 1436 coro->slot = 0;
824 } 1437 }
825 1438
826 deallocate_stack (coro); 1439 cctx_destroy (coro->cctx);
827 SvREFCNT_dec (coro->args); 1440 SvREFCNT_dec (coro->args);
828 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;
829} 1447}
830 1448
831static int 1449static int
832coro_state_clear (SV *sv, MAGIC *mg) 1450coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833{ 1451{
834 struct coro *coro = (struct coro *)mg->mg_ptr; 1452 struct coro *coro = (struct coro *)mg->mg_ptr;
835 mg->mg_ptr = 0; 1453 mg->mg_ptr = 0;
836 1454
1455 coro->hv = 0;
1456
1457 if (--coro->refcnt < 0)
1458 {
837 coro_state_destroy (coro); 1459 coro_state_destroy (aTHX_ coro);
1460 Safefree (coro);
1461 }
838 1462
839 return 0; 1463 return 0;
840} 1464}
841 1465
842static int 1466static int
843coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 1467coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
844{ 1468{
845 struct coro *coro = (struct coro *)mg->mg_ptr; 1469 struct coro *coro = (struct coro *)mg->mg_ptr;
846 1470
847 ++coro->refcnt; 1471 ++coro->refcnt;
848 1472
849 return 0; 1473 return 0;
850} 1474}
851 1475
852static 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};
853 1486
854static struct coro *
855SvSTATE (SV *coro)
856{
857 MAGIC *mg = SvMAGIC (SvROK (coro) ? SvRV (coro) : coro);
858 assert (mg->mg_type == PERL_MAGIC_ext);
859 return (struct coro *)mg->mg_ptr;
860}
861
862static 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
863api_transfer (pTHX_ SV *prev, SV *next, int flags) 1496api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
864{ 1497{
865 SV_CORO (prev, "Coro::transfer"); 1498 struct coro_transfer_args ta;
866 SV_CORO (next, "Coro::transfer");
867 1499
868 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 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);
869} 1525}
870 1526
871/** Coro ********************************************************************/ 1527/** Coro ********************************************************************/
872 1528
873#define PRIO_MAX 3 1529INLINE void
874#define PRIO_HIGH 1 1530coro_enq (pTHX_ struct coro *coro)
875#define PRIO_NORMAL 0 1531{
876#define PRIO_LOW -1 1532 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
877#define PRIO_IDLE -3 1533}
878#define PRIO_MIN -4
879 1534
880/* for Coro.pm */ 1535INLINE SV *
881static GV *coro_current, *coro_idle; 1536coro_deq (pTHX)
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883static int coro_nready;
884
885static void
886coro_enq (pTHX_ SV *sv)
887{ 1537{
888 int prio; 1538 int prio;
889 1539
1540 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1541 if (AvFILLp (coro_ready [prio]) >= 0)
1542 return av_shift (coro_ready [prio]);
1543
1544 return 0;
1545}
1546
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);
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
890 if (SvTYPE (sv) != SVt_PVHV) 1746 if (SvTYPE (SvRV (data)) != SVt_PVAV)
891 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1747 {
1748 /* first call, set args */
1749 int i;
1750 AV *av = newAV ();
1751 SV *coro = SvRV (data);
892 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 */
893 { 1777 {
894 SV *coro = sv; 1778 dSP;
895 SV_CORO (coro, "omg"); 1779 AV *av = (AV *)SvRV (data);
896 prio = SvSTATE (coro)->prio; 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;
897 } 1791 }
898 1792
899 av_push (coro_ready [prio - PRIO_MIN], sv); 1793 return 0;
900 coro_nready++; 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 }
901} 1827}
902 1828
903static SV * 1829static SV *
904coro_deq (pTHX_ int min_prio) 1830coro_new_rouse_cb (pTHX)
905{ 1831{
906 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);
907 1836
908 min_prio -= PRIO_MIN; 1837 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
909 if (min_prio < 0) 1838 SvREFCNT_dec (data); /* magicext increases the refcount */
910 min_prio = 0;
911 1839
912 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1840 SvREFCNT_dec (coro->rouse_cb);
913 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))
914 { 1946 {
915 coro_nready--; 1947 /* ampersand-form of call, use @_ instead of stack */
916 return av_shift (coro_ready [prio]); 1948 AV *av = GvAV (PL_defgv);
1949 arg = AvARRAY (av);
1950 items = AvFILLp (av) + 1;
917 } 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 {
2180 api_ready (aTHX_ cb);
2181 --count;
2182 }
2183 else if (SvTYPE (cb) == SVt_PVCV)
2184 {
2185 dSP;
2186 PUSHMARK (SP);
2187 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2188 PUTBACK;
2189 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2190 }
2191
2192 SvREFCNT_dec (cb);
2193 }
2194}
2195
2196static void
2197coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2198{
2199 /* call $sem->adjust (0) to possibly wake up some other waiters */
2200 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2201}
2202
2203static int
2204slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2205{
2206 AV *av = (AV *)frame->data;
2207 SV *count_sv = AvARRAY (av)[0];
2208
2209 /* if we are about to throw, don't actually acquire the lock, just throw */
2210 if (CORO_THROW)
2211 return 0;
2212 else if (SvIVX (count_sv) > 0)
2213 {
2214 SvSTATE_current->on_destroy = 0;
2215
2216 if (acquire)
2217 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2218 else
2219 coro_semaphore_adjust (aTHX_ av, 0);
2220
2221 return 0;
2222 }
2223 else
2224 {
2225 int i;
2226 /* if we were woken up but can't down, we look through the whole */
2227 /* waiters list and only add us if we aren't in there already */
2228 /* this avoids some degenerate memory usage cases */
2229
2230 for (i = 1; i <= AvFILLp (av); ++i)
2231 if (AvARRAY (av)[i] == SvRV (coro_current))
2232 return 1;
2233
2234 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2235 return 1;
2236 }
2237}
2238
2239static int
2240slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2241{
2242 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2243}
2244
2245static int
2246slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2247{
2248 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2249}
2250
2251static void
2252slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2253{
2254 AV *av = (AV *)SvRV (arg [0]);
2255
2256 if (SvIVX (AvARRAY (av)[0]) > 0)
2257 {
2258 frame->data = (void *)av;
2259 frame->prepare = prepare_nop;
2260 }
2261 else
2262 {
2263 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2264
2265 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2266 frame->prepare = prepare_schedule;
2267
2268 /* to avoid race conditions when a woken-up coro gets terminated */
2269 /* we arrange for a temporary on_destroy that calls adjust (0) */
2270 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2271 }
2272}
2273
2274static void
2275slf_init_semaphore_down (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_down;
2279}
2280
2281static void
2282slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2283{
2284 if (items >= 2)
2285 {
2286 /* callback form */
2287 AV *av = (AV *)SvRV (arg [0]);
2288 HV *st;
2289 GV *gvp;
2290 CV *cb_cv = sv_2cv (arg [1], &st, &gvp, 0);
2291
2292 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2293
2294 if (SvIVX (AvARRAY (av)[0]) > 0)
2295 coro_semaphore_adjust (aTHX_ av, 0);
2296
2297 frame->prepare = prepare_nop;
2298 frame->check = slf_check_nop;
2299 }
2300 else
2301 {
2302 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2303 frame->check = slf_check_semaphore_wait;
2304 }
2305}
2306
2307/* signal */
2308
2309static void
2310coro_signal_wake (pTHX_ AV *av, int count)
2311{
2312 SvIVX (AvARRAY (av)[0]) = 0;
2313
2314 /* now signal count waiters */
2315 while (count > 0 && AvFILLp (av) > 0)
2316 {
2317 SV *cb;
2318
2319 /* swap first two elements so we can shift a waiter */
2320 cb = AvARRAY (av)[0];
2321 AvARRAY (av)[0] = AvARRAY (av)[1];
2322 AvARRAY (av)[1] = cb;
2323
2324 cb = av_shift (av);
2325
2326 api_ready (aTHX_ cb);
2327 sv_setiv (cb, 0); /* signal waiter */
2328 SvREFCNT_dec (cb);
2329
2330 --count;
2331 }
2332}
2333
2334static int
2335slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2336{
2337 /* if we are about to throw, also stop waiting */
2338 return SvROK ((SV *)frame->data) && !CORO_THROW;
2339}
2340
2341static void
2342slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2343{
2344 AV *av = (AV *)SvRV (arg [0]);
2345
2346 if (SvIVX (AvARRAY (av)[0]))
2347 {
2348 SvIVX (AvARRAY (av)[0]) = 0;
2349 frame->prepare = prepare_nop;
2350 frame->check = slf_check_nop;
2351 }
2352 else
2353 {
2354 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2355
2356 av_push (av, waiter);
2357
2358 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2359 frame->prepare = prepare_schedule;
2360 frame->check = slf_check_signal_wait;
2361 }
2362}
2363
2364/*****************************************************************************/
2365/* Coro::AIO */
2366
2367#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2368
2369/* helper storage struct */
2370struct io_state
2371{
2372 int errorno;
2373 I32 laststype; /* U16 in 5.10.0 */
2374 int laststatval;
2375 Stat_t statcache;
2376};
2377
2378static void
2379coro_aio_callback (pTHX_ CV *cv)
2380{
2381 dXSARGS;
2382 AV *state = (AV *)GENSUB_ARG;
2383 SV *coro = av_pop (state);
2384 SV *data_sv = newSV (sizeof (struct io_state));
2385
2386 av_extend (state, items);
2387
2388 sv_upgrade (data_sv, SVt_PV);
2389 SvCUR_set (data_sv, sizeof (struct io_state));
2390 SvPOK_only (data_sv);
2391
2392 {
2393 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2394
2395 data->errorno = errno;
2396 data->laststype = PL_laststype;
2397 data->laststatval = PL_laststatval;
2398 data->statcache = PL_statcache;
2399 }
2400
2401 /* now build the result vector out of all the parameters and the data_sv */
2402 {
2403 int i;
2404
2405 for (i = 0; i < items; ++i)
2406 av_push (state, SvREFCNT_inc_NN (ST (i)));
2407 }
2408
2409 av_push (state, data_sv);
2410
2411 api_ready (aTHX_ coro);
2412 SvREFCNT_dec (coro);
2413 SvREFCNT_dec ((AV *)state);
2414}
2415
2416static int
2417slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2418{
2419 AV *state = (AV *)frame->data;
2420
2421 /* if we are about to throw, return early */
2422 /* this does not cancel the aio request, but at least */
2423 /* it quickly returns */
2424 if (CORO_THROW)
2425 return 0;
2426
2427 /* one element that is an RV? repeat! */
2428 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2429 return 1;
2430
2431 /* restore status */
2432 {
2433 SV *data_sv = av_pop (state);
2434 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2435
2436 errno = data->errorno;
2437 PL_laststype = data->laststype;
2438 PL_laststatval = data->laststatval;
2439 PL_statcache = data->statcache;
2440
2441 SvREFCNT_dec (data_sv);
2442 }
2443
2444 /* push result values */
2445 {
2446 dSP;
2447 int i;
2448
2449 EXTEND (SP, AvFILLp (state) + 1);
2450 for (i = 0; i <= AvFILLp (state); ++i)
2451 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2452
2453 PUTBACK;
2454 }
918 2455
919 return 0; 2456 return 0;
920} 2457}
921 2458
922static void 2459static void
923api_ready (SV *coro) 2460slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
924{ 2461{
925 dTHX; 2462 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
926
927 if (SvROK (coro))
928 coro = SvRV (coro);
929
930 LOCK;
931 coro_enq (aTHX_ SvREFCNT_inc (coro));
932 UNLOCK;
933}
934
935static void
936api_schedule (void)
937{
938 dTHX;
939
940 SV *prev, *next;
941
942 LOCK;
943
944 prev = SvRV (GvSV (coro_current)); 2463 SV *coro_hv = SvRV (coro_current);
945 next = coro_deq (aTHX_ PRIO_MIN); 2464 struct coro *coro = SvSTATE_hv (coro_hv);
946 2465
947 if (!next) 2466 /* put our coroutine id on the state arg */
948 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2467 av_push (state, SvREFCNT_inc_NN (coro_hv));
949 2468
950 /* free this only after the transfer */ 2469 /* first see whether we have a non-zero priority and set it as AIO prio */
951 coro_mortal = prev; 2470 if (coro->prio)
952 SV_CORO (prev, "Coro::schedule"); 2471 {
2472 dSP;
953 2473
954 SvRV (GvSV (coro_current)) = next; 2474 static SV *prio_cv;
2475 static SV *prio_sv;
955 2476
956 SV_CORO (next, "Coro::schedule"); 2477 if (expect_false (!prio_cv))
2478 {
2479 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2480 prio_sv = newSViv (0);
2481 }
957 2482
958 UNLOCK; 2483 PUSHMARK (SP);
2484 sv_setiv (prio_sv, coro->prio);
2485 XPUSHs (prio_sv);
959 2486
960 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2487 PUTBACK;
961 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2488 call_sv (prio_cv, G_VOID | G_DISCARD);
962} 2489 }
963 2490
964static void 2491 /* now call the original request */
965api_cede (void) 2492 {
966{ 2493 dSP;
967 dTHX; 2494 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2495 int i;
968 2496
969 LOCK; 2497 PUSHMARK (SP);
970 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
971 UNLOCK;
972 2498
973 api_schedule (); 2499 /* first push all args to the stack */
974} 2500 EXTEND (SP, items + 1);
975 2501
2502 for (i = 0; i < items; ++i)
2503 PUSHs (arg [i]);
2504
2505 /* now push the callback closure */
2506 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2507
2508 /* now call the AIO function - we assume our request is uncancelable */
2509 PUTBACK;
2510 call_sv ((SV *)req, G_VOID | G_DISCARD);
2511 }
2512
2513 /* now that the requets is going, we loop toll we have a result */
2514 frame->data = (void *)state;
2515 frame->prepare = prepare_schedule;
2516 frame->check = slf_check_aio_req;
2517}
2518
2519static void
2520coro_aio_req_xs (pTHX_ CV *cv)
2521{
2522 dXSARGS;
2523
2524 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2525
2526 XSRETURN_EMPTY;
2527}
2528
2529/*****************************************************************************/
2530
976MODULE = Coro::State PACKAGE = Coro::State 2531MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977 2532
978PROTOTYPES: DISABLE 2533PROTOTYPES: DISABLE
979 2534
980BOOT: 2535BOOT:
981{ /* {} necessary for stoopid perl-5.6.x */ 2536{
982#ifdef USE_ITHREADS 2537#ifdef USE_ITHREADS
983 MUTEX_INIT (&coro_mutex); 2538# if CORO_PTHREAD
2539 coro_thx = PERL_GET_CONTEXT;
2540# endif
984#endif 2541#endif
985 BOOT_PAGESIZE; 2542 BOOT_PAGESIZE;
986 2543
987 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2544 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
988 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2545 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2546
2547 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2548 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2549 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2550
2551 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2552 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2553 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2554
989 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2555 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
990 2556
991 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2557 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
992 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2558 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
993 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2559 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
994 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2560 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
995 2561
996 main_mainstack = PL_mainstack; 2562 main_mainstack = PL_mainstack;
2563 main_top_env = PL_top_env;
997 2564
2565 while (main_top_env->je_prev)
2566 main_top_env = main_top_env->je_prev;
2567
2568 {
2569 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2570
2571 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2572 hv_store_ent (PL_custom_op_names, slf,
2573 newSVpv ("coro_slf", 0), 0);
2574
2575 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2576 hv_store_ent (PL_custom_op_descs, slf,
2577 newSVpv ("coro schedule like function", 0), 0);
2578 }
2579
998 coroapi.ver = CORO_API_VERSION; 2580 coroapi.ver = CORO_API_VERSION;
2581 coroapi.rev = CORO_API_REVISION;
2582
999 coroapi.transfer = api_transfer; 2583 coroapi.transfer = api_transfer;
2584
2585 coroapi.sv_state = SvSTATE_;
2586 coroapi.execute_slf = api_execute_slf;
2587 coroapi.prepare_nop = prepare_nop;
2588 coroapi.prepare_schedule = prepare_schedule;
2589 coroapi.prepare_cede = prepare_cede;
2590 coroapi.prepare_cede_notself = prepare_cede_notself;
2591
2592 {
2593 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2594
2595 if (!svp) croak ("Time::HiRes is required");
2596 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2597
2598 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2599 }
1000 2600
1001 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2601 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1002} 2602}
1003 2603
1004SV * 2604SV *
1005new (char *klass, ...) 2605new (char *klass, ...)
1006 CODE: 2606 CODE:
1007{ 2607{
1008 struct coro *coro; 2608 struct coro *coro;
2609 MAGIC *mg;
1009 HV *hv; 2610 HV *hv;
1010 int i; 2611 int i;
1011 2612
1012 Newz (0, coro, 1, struct coro); 2613 Newz (0, coro, 1, struct coro);
1013 coro->args = newAV (); 2614 coro->args = newAV ();
2615 coro->flags = CF_NEW;
1014 2616
2617 if (coro_first) coro_first->prev = coro;
2618 coro->next = coro_first;
2619 coro_first = coro;
2620
2621 coro->hv = hv = newHV ();
2622 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2623 mg->mg_flags |= MGf_DUP;
2624 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
2625
2626 av_extend (coro->args, items - 1);
1015 for (i = 1; i < items; i++) 2627 for (i = 1; i < items; i++)
1016 av_push (coro->args, newSVsv (ST (i))); 2628 av_push (coro->args, newSVsv (ST (i)));
1017
1018 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1019 /*coro->stack = 0;*/
1020
1021 hv = newHV ();
1022 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1023 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1024} 2629}
1025 OUTPUT: 2630 OUTPUT:
1026 RETVAL 2631 RETVAL
1027 2632
1028void 2633void
1029transfer(prev, next, flags) 2634transfer (...)
1030 SV *prev 2635 PROTOTYPE: $$
1031 SV *next 2636 CODE:
1032 int flags 2637 CORO_EXECUTE_SLF_XS (slf_init_transfer);
2638
2639bool
2640_destroy (SV *coro_sv)
2641 CODE:
2642 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2643 OUTPUT:
2644 RETVAL
2645
2646void
2647_exit (int code)
2648 PROTOTYPE: $
2649 CODE:
2650 _exit (code);
2651
2652int
2653cctx_stacksize (int new_stacksize = 0)
2654 PROTOTYPE: ;$
2655 CODE:
2656 RETVAL = cctx_stacksize;
2657 if (new_stacksize)
2658 {
2659 cctx_stacksize = new_stacksize;
2660 ++cctx_gen;
2661 }
2662 OUTPUT:
2663 RETVAL
2664
2665int
2666cctx_max_idle (int max_idle = 0)
2667 PROTOTYPE: ;$
2668 CODE:
2669 RETVAL = cctx_max_idle;
2670 if (max_idle > 1)
2671 cctx_max_idle = max_idle;
2672 OUTPUT:
2673 RETVAL
2674
2675int
2676cctx_count ()
2677 PROTOTYPE:
2678 CODE:
2679 RETVAL = cctx_count;
2680 OUTPUT:
2681 RETVAL
2682
2683int
2684cctx_idle ()
2685 PROTOTYPE:
2686 CODE:
2687 RETVAL = cctx_idle;
2688 OUTPUT:
2689 RETVAL
2690
2691void
2692list ()
2693 PROTOTYPE:
2694 PPCODE:
2695{
2696 struct coro *coro;
2697 for (coro = coro_first; coro; coro = coro->next)
2698 if (coro->hv)
2699 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2700}
2701
2702void
2703call (Coro::State coro, SV *coderef)
2704 ALIAS:
2705 eval = 1
2706 CODE:
2707{
2708 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2709 {
2710 struct coro temp;
2711
2712 if (!(coro->flags & CF_RUNNING))
2713 {
2714 PUTBACK;
2715 save_perl (aTHX_ &temp);
2716 load_perl (aTHX_ coro);
2717 }
2718
2719 {
2720 dSP;
2721 ENTER;
2722 SAVETMPS;
2723 PUTBACK;
2724 PUSHSTACK;
2725 PUSHMARK (SP);
2726
2727 if (ix)
2728 eval_sv (coderef, 0);
2729 else
2730 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2731
2732 POPSTACK;
2733 SPAGAIN;
2734 FREETMPS;
2735 LEAVE;
2736 PUTBACK;
2737 }
2738
2739 if (!(coro->flags & CF_RUNNING))
2740 {
2741 save_perl (aTHX_ coro);
2742 load_perl (aTHX_ &temp);
2743 SPAGAIN;
2744 }
2745 }
2746}
2747
2748SV *
2749is_ready (Coro::State coro)
2750 PROTOTYPE: $
2751 ALIAS:
2752 is_ready = CF_READY
2753 is_running = CF_RUNNING
2754 is_new = CF_NEW
2755 is_destroyed = CF_DESTROYED
2756 CODE:
2757 RETVAL = boolSV (coro->flags & ix);
2758 OUTPUT:
2759 RETVAL
2760
2761void
2762throw (Coro::State self, SV *throw = &PL_sv_undef)
2763 PROTOTYPE: $;$
1033 CODE: 2764 CODE:
1034 PUTBACK; 2765{
1035 SV_CORO (next, "Coro::transfer"); 2766 struct coro *current = SvSTATE_current;
1036 SV_CORO (prev, "Coro::transfer"); 2767 SV **throwp = self == current ? &CORO_THROW : &self->except;
1037 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2768 SvREFCNT_dec (*throwp);
1038 SPAGAIN; 2769 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2770}
2771
2772void
2773api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2774 PROTOTYPE: $;$
2775 C_ARGS: aTHX_ coro, flags
2776
2777SV *
2778has_cctx (Coro::State coro)
2779 PROTOTYPE: $
2780 CODE:
2781 RETVAL = boolSV (!!coro->cctx);
2782 OUTPUT:
2783 RETVAL
2784
2785int
2786is_traced (Coro::State coro)
2787 PROTOTYPE: $
2788 CODE:
2789 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2790 OUTPUT:
2791 RETVAL
2792
2793UV
2794rss (Coro::State coro)
2795 PROTOTYPE: $
2796 ALIAS:
2797 usecount = 1
2798 CODE:
2799 switch (ix)
2800 {
2801 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2802 case 1: RETVAL = coro->usecount; break;
2803 }
2804 OUTPUT:
2805 RETVAL
2806
2807void
2808force_cctx ()
2809 PROTOTYPE:
2810 CODE:
2811 SvSTATE_current->cctx->idle_sp = 0;
2812
2813void
2814swap_defsv (Coro::State self)
2815 PROTOTYPE: $
2816 ALIAS:
2817 swap_defav = 1
2818 CODE:
2819 if (!self->slot)
2820 croak ("cannot swap state with coroutine that has no saved state,");
2821 else
2822 {
2823 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2824 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2825
2826 SV *tmp = *src; *src = *dst; *dst = tmp;
2827 }
2828
2829
2830MODULE = Coro::State PACKAGE = Coro
2831
2832BOOT:
2833{
2834 int i;
2835
2836 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2837 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2838 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2839
2840 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2841 SvREADONLY_on (coro_current);
2842
2843 coro_stash = gv_stashpv ("Coro", TRUE);
2844
2845 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2846 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2847 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2848 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2849 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2850 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2851
2852 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2853 coro_ready[i] = newAV ();
2854
2855 {
2856 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
2857
2858 coroapi.schedule = api_schedule;
2859 coroapi.cede = api_cede;
2860 coroapi.cede_notself = api_cede_notself;
2861 coroapi.ready = api_ready;
2862 coroapi.is_ready = api_is_ready;
2863 coroapi.nready = coro_nready;
2864 coroapi.current = coro_current;
2865
2866 /*GCoroAPI = &coroapi;*/
2867 sv_setiv (sv, (IV)&coroapi);
2868 SvREADONLY_on (sv);
2869 }
2870}
2871
2872void
2873schedule (...)
2874 CODE:
2875 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2876
2877void
2878cede (...)
2879 CODE:
2880 CORO_EXECUTE_SLF_XS (slf_init_cede);
2881
2882void
2883cede_notself (...)
2884 CODE:
2885 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2886
2887void
2888_set_current (SV *current)
2889 PROTOTYPE: $
2890 CODE:
2891 SvREFCNT_dec (SvRV (coro_current));
2892 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2893
2894void
2895_set_readyhook (SV *hook)
2896 PROTOTYPE: $
2897 CODE:
2898 SvREFCNT_dec (coro_readyhook);
2899 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1039 2900
1040int 2901int
1041prio (Coro::State coro, int newprio = 0) 2902prio (Coro::State coro, int newprio = 0)
2903 PROTOTYPE: $;$
1042 ALIAS: 2904 ALIAS:
1043 nice = 1 2905 nice = 1
1044 CODE: 2906 CODE:
1045{ 2907{
1046 RETVAL = coro->prio; 2908 RETVAL = coro->prio;
1047 2909
1048 if (items > 1) 2910 if (items > 1)
1049 { 2911 {
1050 if (ix) 2912 if (ix)
1051 newprio += coro->prio; 2913 newprio = coro->prio - newprio;
1052 2914
1053 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 2915 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1054 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 2916 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1055 2917
1056 coro->prio = newprio; 2918 coro->prio = newprio;
1057 } 2919 }
1058} 2920}
2921 OUTPUT:
2922 RETVAL
1059 2923
1060void 2924SV *
1061_clone_state_from (SV *dst, SV *src) 2925ready (SV *self)
1062 CODE:
1063{
1064 struct coro *coro_src = SvSTATE (src);
1065
1066 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1067
1068 ++coro_src->refcnt;
1069 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1070}
1071
1072void
1073_exit (code)
1074 int code
1075 PROTOTYPE: $ 2926 PROTOTYPE: $
1076 CODE: 2927 CODE:
1077 _exit (code); 2928 RETVAL = boolSV (api_ready (aTHX_ self));
1078 2929 OUTPUT:
1079MODULE = Coro::State PACKAGE = Coro::Cont 2930 RETVAL
1080
1081void
1082yield (...)
1083 PROTOTYPE: @
1084 CODE:
1085 SV *yieldstack;
1086 SV *sv;
1087 AV *defav = GvAV (PL_defgv);
1088 struct coro *prev, *next;
1089
1090 yieldstack = *hv_fetch (
1091 (HV *)SvRV (GvSV (coro_current)),
1092 "yieldstack", sizeof ("yieldstack") - 1,
1093 0
1094 );
1095
1096 /* set up @_ -- ugly */
1097 av_clear (defav);
1098 av_fill (defav, items - 1);
1099 while (items--)
1100 av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102 sv = av_pop ((AV *)SvRV (yieldstack));
1103 prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1104 next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1105 SvREFCNT_dec (sv);
1106
1107 coro_state_transfer (aTHX_ prev, next, 0);
1108
1109MODULE = Coro::State PACKAGE = Coro
1110
1111BOOT:
1112{
1113 int i;
1114 HV *stash = gv_stashpv ("Coro", TRUE);
1115
1116 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1117 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1118 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1119 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1120 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1121 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1122
1123 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1124 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1125
1126 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1127 coro_ready[i] = newAV ();
1128
1129 {
1130 SV *sv = perl_get_sv("Coro::API", 1);
1131
1132 coroapi.schedule = api_schedule;
1133 coroapi.cede = api_cede;
1134 coroapi.ready = api_ready;
1135 coroapi.nready = &coro_nready;
1136 coroapi.current = coro_current;
1137
1138 GCoroAPI = &coroapi;
1139 sv_setiv (sv, (IV)&coroapi);
1140 SvREADONLY_on (sv);
1141 }
1142}
1143
1144#if !PERL_MICRO
1145
1146void
1147ready (self)
1148 SV * self
1149 PROTOTYPE: $
1150 CODE:
1151 api_ready (self);
1152
1153#endif
1154 2931
1155int 2932int
1156nready (...) 2933nready (...)
1157 PROTOTYPE: 2934 PROTOTYPE:
1158 CODE: 2935 CODE:
1159 RETVAL = coro_nready; 2936 RETVAL = coro_nready;
1160 OUTPUT: 2937 OUTPUT:
1161 RETVAL 2938 RETVAL
1162 2939
2940# for async_pool speedup
1163void 2941void
1164schedule (...) 2942_pool_1 (SV *cb)
1165 PROTOTYPE:
1166 CODE: 2943 CODE:
1167 api_schedule (); 2944{
2945 HV *hv = (HV *)SvRV (coro_current);
2946 struct coro *coro = SvSTATE_hv ((SV *)hv);
2947 AV *defav = GvAV (PL_defgv);
2948 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2949 AV *invoke_av;
2950 int i, len;
2951
2952 if (!invoke)
2953 {
2954 SV *old = PL_diehook;
2955 PL_diehook = 0;
2956 SvREFCNT_dec (old);
2957 croak ("\3async_pool terminate\2\n");
2958 }
2959
2960 SvREFCNT_dec (coro->saved_deffh);
2961 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2962
2963 hv_store (hv, "desc", sizeof ("desc") - 1,
2964 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2965
2966 invoke_av = (AV *)SvRV (invoke);
2967 len = av_len (invoke_av);
2968
2969 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2970
2971 if (len > 0)
2972 {
2973 av_fill (defav, len - 1);
2974 for (i = 0; i < len; ++i)
2975 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2976 }
2977}
1168 2978
1169void 2979void
1170cede (...) 2980_pool_2 (SV *cb)
1171 PROTOTYPE:
1172 CODE: 2981 CODE:
1173 api_cede (); 2982{
2983 HV *hv = (HV *)SvRV (coro_current);
2984 struct coro *coro = SvSTATE_hv ((SV *)hv);
1174 2985
1175# and these are hacks 2986 sv_setsv (cb, &PL_sv_undef);
2987
2988 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2989 coro->saved_deffh = 0;
2990
2991 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2992 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2993 {
2994 SV *old = PL_diehook;
2995 PL_diehook = 0;
2996 SvREFCNT_dec (old);
2997 croak ("\3async_pool terminate\2\n");
2998 }
2999
3000 av_clear (GvAV (PL_defgv));
3001 hv_store (hv, "desc", sizeof ("desc") - 1,
3002 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
3003
3004 coro->prio = 0;
3005
3006 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
3007 api_trace (aTHX_ coro_current, 0);
3008
3009 av_push (av_async_pool, newSVsv (coro_current));
3010}
3011
1176SV * 3012SV *
1177_aio_get_state () 3013rouse_cb ()
3014 PROTOTYPE:
1178 CODE: 3015 CODE:
1179{ 3016 RETVAL = coro_new_rouse_cb (aTHX);
1180 struct {
1181 int errorno;
1182 int laststype;
1183 int laststatval;
1184 Stat_t statcache;
1185 } data;
1186
1187 data.errorno = errno;
1188 data.laststype = PL_laststype;
1189 data.laststatval = PL_laststatval;
1190 data.statcache = PL_statcache;
1191
1192 RETVAL = newSVpvn ((char *)&data, sizeof data);
1193}
1194 OUTPUT: 3017 OUTPUT:
1195 RETVAL 3018 RETVAL
1196 3019
1197void 3020void
1198_aio_set_state (char *data_) 3021rouse_wait (...)
1199 PROTOTYPE: $ 3022 PROTOTYPE: ;$
3023 PPCODE:
3024 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3025
3026
3027MODULE = Coro::State PACKAGE = PerlIO::cede
3028
3029BOOT:
3030 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3031
3032
3033MODULE = Coro::State PACKAGE = Coro::Semaphore
3034
3035SV *
3036new (SV *klass, SV *count = 0)
1200 CODE: 3037 CODE:
3038 RETVAL = sv_bless (
3039 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3040 GvSTASH (CvGV (cv))
3041 );
3042 OUTPUT:
3043 RETVAL
3044
3045# helper for Coro::Channel
3046SV *
3047_alloc (int count)
3048 CODE:
3049 RETVAL = coro_waitarray_new (aTHX_ count);
3050 OUTPUT:
3051 RETVAL
3052
3053SV *
3054count (SV *self)
3055 CODE:
3056 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3057 OUTPUT:
3058 RETVAL
3059
3060void
3061up (SV *self, int adjust = 1)
3062 ALIAS:
3063 adjust = 1
3064 CODE:
3065 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3066
3067void
3068down (...)
3069 CODE:
3070 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3071
3072void
3073wait (...)
3074 CODE:
3075 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3076
3077void
3078try (SV *self)
3079 PPCODE:
1201{ 3080{
1202 struct { 3081 AV *av = (AV *)SvRV (self);
3082 SV *count_sv = AvARRAY (av)[0];
3083 IV count = SvIVX (count_sv);
3084
3085 if (count > 0)
3086 {
3087 --count;
3088 SvIVX (count_sv) = count;
3089 XSRETURN_YES;
3090 }
3091 else
3092 XSRETURN_NO;
3093}
3094
3095void
3096waiters (SV *self)
3097 PPCODE:
3098{
3099 AV *av = (AV *)SvRV (self);
3100 int wcount = AvFILLp (av) + 1 - 1;
3101
3102 if (GIMME_V == G_SCALAR)
3103 XPUSHs (sv_2mortal (newSViv (wcount)));
3104 else
3105 {
1203 int errorno; 3106 int i;
1204 int laststype; 3107 EXTEND (SP, wcount);
1205 int laststatval; 3108 for (i = 1; i <= wcount; ++i)
1206 Stat_t statcache; 3109 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1207 } *data = (void *)data_; 3110 }
1208
1209 errno = data->errorno;
1210 PL_laststype = data->laststype;
1211 PL_laststatval = data->laststatval;
1212 PL_statcache = data->statcache;
1213} 3111}
3112
3113MODULE = Coro::State PACKAGE = Coro::Signal
3114
3115SV *
3116new (SV *klass)
3117 CODE:
3118 RETVAL = sv_bless (
3119 coro_waitarray_new (aTHX_ 0),
3120 GvSTASH (CvGV (cv))
3121 );
3122 OUTPUT:
3123 RETVAL
3124
3125void
3126wait (...)
3127 CODE:
3128 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3129
3130void
3131broadcast (SV *self)
3132 CODE:
3133{
3134 AV *av = (AV *)SvRV (self);
3135 coro_signal_wake (aTHX_ av, AvFILLp (av));
3136}
3137
3138void
3139send (SV *self)
3140 CODE:
3141{
3142 AV *av = (AV *)SvRV (self);
3143
3144 if (AvFILLp (av))
3145 coro_signal_wake (aTHX_ av, 1);
3146 else
3147 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3148}
3149
3150IV
3151awaited (SV *self)
3152 CODE:
3153 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3154 OUTPUT:
3155 RETVAL
3156
3157
3158MODULE = Coro::State PACKAGE = Coro::AnyEvent
3159
3160BOOT:
3161 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3162
3163void
3164_schedule (...)
3165 CODE:
3166{
3167 static int incede;
3168
3169 api_cede_notself (aTHX);
3170
3171 ++incede;
3172 while (coro_nready >= incede && api_cede (aTHX))
3173 ;
3174
3175 sv_setsv (sv_activity, &PL_sv_undef);
3176 if (coro_nready >= incede)
3177 {
3178 PUSHMARK (SP);
3179 PUTBACK;
3180 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3181 }
3182
3183 --incede;
3184}
3185
3186
3187MODULE = Coro::State PACKAGE = Coro::AIO
3188
3189void
3190_register (char *target, char *proto, SV *req)
3191 CODE:
3192{
3193 HV *st;
3194 GV *gvp;
3195 CV *req_cv = sv_2cv (req, &st, &gvp, 0);
3196 /* newXSproto doesn't return the CV on 5.8 */
3197 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3198 sv_setpv ((SV *)slf_cv, proto);
3199 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3200}
3201

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