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Comparing Coro/Coro/State.xs (file contents):
Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs.
Revision 1.307 by root, Wed Nov 19 14:34:46 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 */
33 84#ifndef CxHASARGS
34#ifdef HAVE_MMAP 85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
35# include <unistd.h>
36# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS
38# ifdef MAP_ANON
39# define MAP_ANONYMOUS MAP_ANON
40# else
41# undef HAVE_MMAP
42# endif 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
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
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;
43# endif 155# endif
44#endif 156#endif
45 157
46#define SUB_INIT "Coro::State::initialize" 158static double (*nvtime)(); /* so why doesn't it take void? */
47#define UCORO_STATE "_coro_state"
48 159
49/* The next macro should declare a variable stacklevel that contains and approximation 160/* we hijack an hopefully unused CV flag for our purposes */
50 * to the current C stack pointer. Its property is that it changes with each call 161#define CVf_SLF 0x4000
51 * and should be unique. */ 162static OP *pp_slf (pTHX);
52#define dSTACKLEVEL void *stacklevel = &stacklevel
53 163
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 164static U32 cctx_gen;
55 165static size_t cctx_stacksize = CORO_STACKSIZE;
56#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58#include "CoroAPI.h"
59
60#ifdef USE_ITHREADS
61static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else
65# define LOCK (void)0
66# define UNLOCK (void)0
67#endif
68
69static struct CoroAPI coroapi; 166static struct CoroAPI coroapi;
70static 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;
71static HV *coro_state_stash; 169static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 170static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
75 171
76/* 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 */
77typedef struct { 199typedef struct coro_cctx
78 int refcnt; /* pointer reference counter */ 200{
79 int usecnt; /* shared by how many coroutines */ 201 struct coro_cctx *next;
80 int gencnt; /* generation counter */
81 202
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;
82 coro_context cctx; 211 coro_context cctx;
83 212
84 void *sptr; 213 U32 gen;
85 long ssize; /* positive == mmap, otherwise malloc */ 214#if CORO_USE_VALGRIND
86} coro_stack; 215 int valgrind_id;
216#endif
217 unsigned char flags;
218} coro_cctx;
87 219
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 */
88struct coro { 242struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 243 /* the C coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 244 coro_cctx *cctx;
91 245
92 /* the optional C context */ 246 /* state data */
93 coro_stack *stack; 247 struct CoroSLF slf_frame; /* saved slf frame */
94 void *cursp;
95 int gencnt;
96
97 /* optionally saved, might be zero */
98 AV *defav;
99 SV *defsv;
100 SV *errsv;
101
102 /* saved global state not related to stacks */
103 U8 dowarn;
104 I32 in_eval;
105
106 /* the stacks and related info (callchain etc..) */
107 PERL_SI *curstackinfo;
108 AV *curstack;
109 AV *mainstack; 248 AV *mainstack;
110 SV **stack_sp; 249 perl_slots *slot; /* basically the saved sp */
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 CV *compcv;
115 SV **stack_base;
116 SV **stack_max;
117 SV **tmps_stack;
118 I32 tmps_floor;
119 I32 tmps_ix;
120 I32 tmps_max;
121 I32 *markstack;
122 I32 *markstack_ptr;
123 I32 *markstack_max;
124 I32 *scopestack;
125 I32 scopestack_ix;
126 I32 scopestack_max;
127 ANY *savestack;
128 I32 savestack_ix;
129 I32 savestack_max;
130 OP **retstack;
131 I32 retstack_ix;
132 I32 retstack_max;
133 PMOP *curpm;
134 COP *curcop;
135 JMPENV *top_env;
136 250
251 CV *startcv; /* the CV to execute */
137 /* data associated with this coroutine (initial args) */ 252 AV *args; /* data associated with this coroutine (initial args) */
138 AV *args; 253 int refcnt; /* coroutines are refcounted, yes */
254 int flags; /* CF_ flags */
255 HV *hv; /* the perl hash associated with this coro, if any */
256 void (*on_destroy)(pTHX_ struct coro *coro);
257
258 /* statistics */
259 int usecount; /* number of transfers to this coro */
260
261 /* coro process data */
262 int prio;
263 SV *except; /* exception to be thrown */
264 SV *rouse_cb;
265
266 /* async_pool */
267 SV *saved_deffh;
268
269 /* linked list */
270 struct coro *next, *prev;
139}; 271};
140 272
141typedef struct coro *Coro__State; 273typedef struct coro *Coro__State;
142typedef struct coro *Coro__State_or_hashref; 274typedef struct coro *Coro__State_or_hashref;
143 275
276/* the following variables are effectively part of the perl context */
277/* and get copied between struct coro and these variables */
278/* the mainr easonw e don't support windows process emulation */
279static struct CoroSLF slf_frame; /* the current slf frame */
280
281/** Coro ********************************************************************/
282
283#define PRIO_MAX 3
284#define PRIO_HIGH 1
285#define PRIO_NORMAL 0
286#define PRIO_LOW -1
287#define PRIO_IDLE -3
288#define PRIO_MIN -4
289
290/* for Coro.pm */
291static SV *coro_current;
292static SV *coro_readyhook;
293static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
294static struct coro *coro_first;
295#define coro_nready coroapi.nready
296
297/** lowlevel stuff **********************************************************/
298
299static SV *
300coro_get_sv (pTHX_ const char *name, int create)
301{
302#if PERL_VERSION_ATLEAST (5,10,0)
303 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
304 get_sv (name, create);
305#endif
306 return get_sv (name, create);
307}
308
309static AV *
310coro_get_av (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_av (name, create);
315#endif
316 return get_av (name, create);
317}
318
319static HV *
320coro_get_hv (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_hv (name, create);
325#endif
326 return get_hv (name, create);
327}
328
329/* may croak */
330INLINE CV *
331coro_sv_2cv (SV *sv)
332{
333 HV *st;
334 GV *gvp;
335 return sv_2cv (sv, &st, &gvp, 0);
336}
337
144static AV * 338static AV *
145coro_clone_padlist (pTHX_ CV *cv) 339coro_clone_padlist (pTHX_ CV *cv)
146{ 340{
147 AV *padlist = CvPADLIST (cv); 341 AV *padlist = CvPADLIST (cv);
148 AV *newpadlist, *newpad; 342 AV *newpadlist, *newpad;
149 343
150 newpadlist = newAV (); 344 newpadlist = newAV ();
151 AvREAL_off (newpadlist); 345 AvREAL_off (newpadlist);
346#if PERL_VERSION_ATLEAST (5,10,0)
347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
348#else
152 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 349 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
350#endif
153 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 351 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
154 --AvFILLp (padlist); 352 --AvFILLp (padlist);
155 353
156 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 354 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
157 av_store (newpadlist, 1, (SV *)newpad); 355 av_store (newpadlist, 1, (SV *)newpad);
158 356
159 return newpadlist; 357 return newpadlist;
160} 358}
161 359
… …
191 389
192 /* casting is fun. */ 390 /* casting is fun. */
193 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 391 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
194 free_padlist (aTHX_ padlist); 392 free_padlist (aTHX_ padlist);
195 393
196 SvREFCNT_dec (av); 394 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
197 395
198 return 0; 396 return 0;
199} 397}
200 398
399#define CORO_MAGIC_type_cv 26
201#define PERL_MAGIC_coro PERL_MAGIC_ext 400#define CORO_MAGIC_type_state PERL_MAGIC_ext
202 401
203static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 402static MGVTBL coro_cv_vtbl = {
403 0, 0, 0, 0,
404 coro_cv_free
405};
406
407#define CORO_MAGIC_NN(sv, type) \
408 (expect_true (SvMAGIC (sv)->mg_type == type) \
409 ? SvMAGIC (sv) \
410 : mg_find (sv, type))
411
412#define CORO_MAGIC(sv, type) \
413 (expect_true (SvMAGIC (sv)) \
414 ? CORO_MAGIC_NN (sv, type) \
415 : 0)
416
417#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
418#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
419
420INLINE struct coro *
421SvSTATE_ (pTHX_ SV *coro)
422{
423 HV *stash;
424 MAGIC *mg;
425
426 if (SvROK (coro))
427 coro = SvRV (coro);
428
429 if (expect_false (SvTYPE (coro) != SVt_PVHV))
430 croak ("Coro::State object required");
431
432 stash = SvSTASH (coro);
433 if (expect_false (stash != coro_stash && stash != coro_state_stash))
434 {
435 /* very slow, but rare, check */
436 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
437 croak ("Coro::State object required");
438 }
439
440 mg = CORO_MAGIC_state (coro);
441 return (struct coro *)mg->mg_ptr;
442}
443
444#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
445
446/* faster than SvSTATE, but expects a coroutine hv */
447#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
448#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
204 449
205/* the next two functions merely cache the padlists */ 450/* the next two functions merely cache the padlists */
206static void 451static void
207get_padlist (pTHX_ CV *cv) 452get_padlist (pTHX_ CV *cv)
208{ 453{
209 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 454 MAGIC *mg = CORO_MAGIC_cv (cv);
455 AV *av;
210 456
211 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 457 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
212 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 458 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
213 else 459 else
214 { 460 {
215#if 0 461#if CORO_PREFER_PERL_FUNCTIONS
216 /* this should work - but it doesn't :( */ 462 /* this is probably cleaner? but also slower! */
463 /* in practise, it seems to be less stable */
217 CV *cp = Perl_cv_clone (aTHX_ cv); 464 CV *cp = Perl_cv_clone (aTHX_ cv);
218 CvPADLIST (cv) = CvPADLIST (cp); 465 CvPADLIST (cv) = CvPADLIST (cp);
219 CvPADLIST (cp) = 0; 466 CvPADLIST (cp) = 0;
220 SvREFCNT_dec (cp); 467 SvREFCNT_dec (cp);
221#else 468#else
… …
225} 472}
226 473
227static void 474static void
228put_padlist (pTHX_ CV *cv) 475put_padlist (pTHX_ CV *cv)
229{ 476{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 477 MAGIC *mg = CORO_MAGIC_cv (cv);
478 AV *av;
231 479
232 if (!mg) 480 if (expect_false (!mg))
233 { 481 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
234 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
235 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
236 mg->mg_virtual = &vtbl_coro;
237 mg->mg_obj = (SV *)newAV ();
238 }
239 482
240 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 483 av = (AV *)mg->mg_obj;
241}
242 484
243#define SB do { 485 if (expect_false (AvFILLp (av) >= AvMAX (av)))
244#define SE } while (0) 486 av_extend (av, AvMAX (av) + 1);
245 487
246#define LOAD(state) load_state(aTHX_ (state)); 488 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
247#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 489}
248 490
249#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 491/** load & save, init *******************************************************/
250 492
251static void 493static void
252load_state(pTHX_ Coro__State c) 494load_perl (pTHX_ Coro__State c)
253{ 495{
254 PL_dowarn = c->dowarn; 496 perl_slots *slot = c->slot;
255 PL_in_eval = c->in_eval; 497 c->slot = 0;
256 498
257 PL_curstackinfo = c->curstackinfo;
258 PL_curstack = c->curstack;
259 PL_mainstack = c->mainstack; 499 PL_mainstack = c->mainstack;
260 PL_stack_sp = c->stack_sp;
261 PL_op = c->op;
262 PL_curpad = c->curpad;
263 PL_comppad = c->comppad;
264 PL_compcv = c->compcv;
265 PL_stack_base = c->stack_base;
266 PL_stack_max = c->stack_max;
267 PL_tmps_stack = c->tmps_stack;
268 PL_tmps_floor = c->tmps_floor;
269 PL_tmps_ix = c->tmps_ix;
270 PL_tmps_max = c->tmps_max;
271 PL_markstack = c->markstack;
272 PL_markstack_ptr = c->markstack_ptr;
273 PL_markstack_max = c->markstack_max;
274 PL_scopestack = c->scopestack;
275 PL_scopestack_ix = c->scopestack_ix;
276 PL_scopestack_max = c->scopestack_max;
277 PL_savestack = c->savestack;
278 PL_savestack_ix = c->savestack_ix;
279 PL_savestack_max = c->savestack_max;
280#if PERL_VERSION < 9
281 PL_retstack = c->retstack;
282 PL_retstack_ix = c->retstack_ix;
283 PL_retstack_max = c->retstack_max;
284#endif
285 PL_curpm = c->curpm;
286 PL_curcop = c->curcop;
287 PL_top_env = c->top_env;
288 500
289 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 501 GvSV (PL_defgv) = slot->defsv;
290 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 502 GvAV (PL_defgv) = slot->defav;
291 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 503 GvSV (PL_errgv) = slot->errsv;
504 GvSV (irsgv) = slot->irsgv;
505
506 #define VAR(name,type) PL_ ## name = slot->name;
507 # include "state.h"
508 #undef VAR
292 509
293 { 510 {
294 dSP; 511 dSP;
512
295 CV *cv; 513 CV *cv;
296 514
297 /* now do the ugly restore mess */ 515 /* now do the ugly restore mess */
298 while ((cv = (CV *)POPs)) 516 while (expect_true (cv = (CV *)POPs))
299 { 517 {
300 AV *padlist = (AV *)POPs;
301
302 if (padlist)
303 {
304 put_padlist (aTHX_ cv); /* mark this padlist as available */ 518 put_padlist (aTHX_ cv); /* mark this padlist as available */
305 CvPADLIST(cv) = padlist; 519 CvDEPTH (cv) = PTR2IV (POPs);
306 } 520 CvPADLIST (cv) = (AV *)POPs;
307
308 ++CvDEPTH(cv);
309 } 521 }
310 522
311 PUTBACK; 523 PUTBACK;
312 } 524 }
313}
314 525
526 slf_frame = c->slf_frame;
527 CORO_THROW = c->except;
528}
529
315static void 530static void
316save_state(pTHX_ Coro__State c, int flags) 531save_perl (pTHX_ Coro__State c)
317{ 532{
533 c->except = CORO_THROW;
534 c->slf_frame = slf_frame;
535
318 { 536 {
319 dSP; 537 dSP;
320 I32 cxix = cxstack_ix; 538 I32 cxix = cxstack_ix;
321 PERL_CONTEXT *ccstk = cxstack; 539 PERL_CONTEXT *ccstk = cxstack;
322 PERL_SI *top_si = PL_curstackinfo; 540 PERL_SI *top_si = PL_curstackinfo;
… …
324 /* 542 /*
325 * the worst thing you can imagine happens first - we have to save 543 * the worst thing you can imagine happens first - we have to save
326 * (and reinitialize) all cv's in the whole callchain :( 544 * (and reinitialize) all cv's in the whole callchain :(
327 */ 545 */
328 546
329 PUSHs (Nullsv); 547 XPUSHs (Nullsv);
330 /* this loop was inspired by pp_caller */ 548 /* this loop was inspired by pp_caller */
331 for (;;) 549 for (;;)
332 { 550 {
333 while (cxix >= 0) 551 while (expect_true (cxix >= 0))
334 { 552 {
335 PERL_CONTEXT *cx = &ccstk[cxix--]; 553 PERL_CONTEXT *cx = &ccstk[cxix--];
336 554
337 if (CxTYPE(cx) == CXt_SUB) 555 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
338 { 556 {
339 CV *cv = cx->blk_sub.cv; 557 CV *cv = cx->blk_sub.cv;
558
340 if (CvDEPTH(cv)) 559 if (expect_true (CvDEPTH (cv)))
341 { 560 {
342 EXTEND (SP, CvDEPTH(cv)*2); 561 EXTEND (SP, 3);
343
344 while (--CvDEPTH(cv))
345 {
346 /* this tells the restore code to increment CvDEPTH */
347 PUSHs (Nullsv);
348 PUSHs ((SV *)cv);
349 }
350
351 PUSHs ((SV *)CvPADLIST(cv)); 562 PUSHs ((SV *)CvPADLIST (cv));
563 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
352 PUSHs ((SV *)cv); 564 PUSHs ((SV *)cv);
353 565
566 CvDEPTH (cv) = 0;
354 get_padlist (aTHX_ cv); 567 get_padlist (aTHX_ cv);
355 } 568 }
356 } 569 }
357#ifdef CXt_FORMAT
358 else if (CxTYPE(cx) == CXt_FORMAT)
359 {
360 /* I never used formats, so how should I know how these are implemented? */
361 /* my bold guess is as a simple, plain sub... */
362 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
363 }
364#endif
365 } 570 }
366 571
367 if (top_si->si_type == PERLSI_MAIN) 572 if (expect_true (top_si->si_type == PERLSI_MAIN))
368 break; 573 break;
369 574
370 top_si = top_si->si_prev; 575 top_si = top_si->si_prev;
371 ccstk = top_si->si_cxstack; 576 ccstk = top_si->si_cxstack;
372 cxix = top_si->si_cxix; 577 cxix = top_si->si_cxix;
373 } 578 }
374 579
375 PUTBACK; 580 PUTBACK;
376 } 581 }
377 582
378 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 583 /* allocate some space on the context stack for our purposes */
379 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 584 /* we manually unroll here, as usually 2 slots is enough */
380 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 585 if (SLOT_COUNT >= 1) CXINC;
586 if (SLOT_COUNT >= 2) CXINC;
587 if (SLOT_COUNT >= 3) CXINC;
588 {
589 int i;
590 for (i = 3; i < SLOT_COUNT; ++i)
591 CXINC;
592 }
593 cxstack_ix -= SLOT_COUNT; /* undo allocation */
381 594
382 c->dowarn = PL_dowarn;
383 c->in_eval = PL_in_eval;
384
385 c->curstackinfo = PL_curstackinfo;
386 c->curstack = PL_curstack;
387 c->mainstack = PL_mainstack; 595 c->mainstack = PL_mainstack;
388 c->stack_sp = PL_stack_sp; 596
389 c->op = PL_op; 597 {
390 c->curpad = PL_curpad; 598 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
391 c->comppad = PL_comppad; 599
392 c->compcv = PL_compcv; 600 slot->defav = GvAV (PL_defgv);
393 c->stack_base = PL_stack_base; 601 slot->defsv = DEFSV;
394 c->stack_max = PL_stack_max; 602 slot->errsv = ERRSV;
395 c->tmps_stack = PL_tmps_stack; 603 slot->irsgv = GvSV (irsgv);
396 c->tmps_floor = PL_tmps_floor; 604
397 c->tmps_ix = PL_tmps_ix; 605 #define VAR(name,type) slot->name = PL_ ## name;
398 c->tmps_max = PL_tmps_max; 606 # include "state.h"
399 c->markstack = PL_markstack; 607 #undef VAR
400 c->markstack_ptr = PL_markstack_ptr; 608 }
401 c->markstack_max = PL_markstack_max;
402 c->scopestack = PL_scopestack;
403 c->scopestack_ix = PL_scopestack_ix;
404 c->scopestack_max = PL_scopestack_max;
405 c->savestack = PL_savestack;
406 c->savestack_ix = PL_savestack_ix;
407 c->savestack_max = PL_savestack_max;
408#if PERL_VERSION < 9
409 c->retstack = PL_retstack;
410 c->retstack_ix = PL_retstack_ix;
411 c->retstack_max = PL_retstack_max;
412#endif
413 c->curpm = PL_curpm;
414 c->curcop = PL_curcop;
415 c->top_env = PL_top_env;
416} 609}
417 610
418/* 611/*
419 * allocate various perl stacks. This is an exact copy 612 * allocate various perl stacks. This is almost an exact copy
420 * of perl.c:init_stacks, except that it uses less memory 613 * of perl.c:init_stacks, except that it uses less memory
421 * on the (sometimes correct) assumption that coroutines do 614 * on the (sometimes correct) assumption that coroutines do
422 * not usually need a lot of stackspace. 615 * not usually need a lot of stackspace.
423 */ 616 */
617#if CORO_PREFER_PERL_FUNCTIONS
618# define coro_init_stacks(thx) init_stacks ()
619#else
424static void 620static void
425coro_init_stacks (pTHX) 621coro_init_stacks (pTHX)
426{ 622{
427 LOCK; 623 PL_curstackinfo = new_stackinfo(32, 8);
428
429 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
430 PL_curstackinfo->si_type = PERLSI_MAIN; 624 PL_curstackinfo->si_type = PERLSI_MAIN;
431 PL_curstack = PL_curstackinfo->si_stack; 625 PL_curstack = PL_curstackinfo->si_stack;
432 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 626 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
433 627
434 PL_stack_base = AvARRAY(PL_curstack); 628 PL_stack_base = AvARRAY(PL_curstack);
435 PL_stack_sp = PL_stack_base; 629 PL_stack_sp = PL_stack_base;
436 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 630 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
437 631
438 New(50,PL_tmps_stack,96,SV*); 632 New(50,PL_tmps_stack,32,SV*);
439 PL_tmps_floor = -1; 633 PL_tmps_floor = -1;
440 PL_tmps_ix = -1; 634 PL_tmps_ix = -1;
441 PL_tmps_max = 96; 635 PL_tmps_max = 32;
442 636
443 New(54,PL_markstack,16,I32); 637 New(54,PL_markstack,16,I32);
444 PL_markstack_ptr = PL_markstack; 638 PL_markstack_ptr = PL_markstack;
445 PL_markstack_max = PL_markstack + 16; 639 PL_markstack_max = PL_markstack + 16;
446 640
447#ifdef SET_MARK_OFFSET 641#ifdef SET_MARK_OFFSET
448 SET_MARK_OFFSET; 642 SET_MARK_OFFSET;
449#endif 643#endif
450 644
451 New(54,PL_scopestack,16,I32); 645 New(54,PL_scopestack,8,I32);
452 PL_scopestack_ix = 0; 646 PL_scopestack_ix = 0;
453 PL_scopestack_max = 16; 647 PL_scopestack_max = 8;
454 648
455 New(54,PL_savestack,96,ANY); 649 New(54,PL_savestack,24,ANY);
456 PL_savestack_ix = 0; 650 PL_savestack_ix = 0;
457 PL_savestack_max = 96; 651 PL_savestack_max = 24;
458 652
459#if PERL_VERSION < 9 653#if !PERL_VERSION_ATLEAST (5,10,0)
460 New(54,PL_retstack,8,OP*); 654 New(54,PL_retstack,4,OP*);
461 PL_retstack_ix = 0; 655 PL_retstack_ix = 0;
462 PL_retstack_max = 8; 656 PL_retstack_max = 4;
463#endif 657#endif
464
465 UNLOCK;
466} 658}
659#endif
467 660
468/* 661/*
469 * destroy the stacks, the callchain etc... 662 * destroy the stacks, the callchain etc...
470 */ 663 */
471static void 664static void
472destroy_stacks(pTHX) 665coro_destruct_stacks (pTHX)
473{ 666{
474 if (!IN_DESTRUCT)
475 {
476 /* is this ugly, I ask? */
477 LEAVE_SCOPE (0);
478
479 /* sure it is, but more important: is it correct?? :/ */
480 FREETMPS;
481
482 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
483 }
484
485 while (PL_curstackinfo->si_next) 667 while (PL_curstackinfo->si_next)
486 PL_curstackinfo = PL_curstackinfo->si_next; 668 PL_curstackinfo = PL_curstackinfo->si_next;
487 669
488 while (PL_curstackinfo) 670 while (PL_curstackinfo)
489 { 671 {
490 PERL_SI *p = PL_curstackinfo->si_prev; 672 PERL_SI *p = PL_curstackinfo->si_prev;
491 673
492 { /*D*//*remove*/
493 dSP;
494 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
495 PUTBACK; /* possibly superfluous */
496 }
497
498 if (!IN_DESTRUCT) 674 if (!IN_DESTRUCT)
499 {
500 dounwind (-1);/*D*//*remove*/
501 SvREFCNT_dec (PL_curstackinfo->si_stack); 675 SvREFCNT_dec (PL_curstackinfo->si_stack);
502 }
503 676
504 Safefree (PL_curstackinfo->si_cxstack); 677 Safefree (PL_curstackinfo->si_cxstack);
505 Safefree (PL_curstackinfo); 678 Safefree (PL_curstackinfo);
506 PL_curstackinfo = p; 679 PL_curstackinfo = p;
507 } 680 }
508 681
509 Safefree (PL_tmps_stack); 682 Safefree (PL_tmps_stack);
510 Safefree (PL_markstack); 683 Safefree (PL_markstack);
511 Safefree (PL_scopestack); 684 Safefree (PL_scopestack);
512 Safefree (PL_savestack); 685 Safefree (PL_savestack);
513#if PERL_VERSION < 9 686#if !PERL_VERSION_ATLEAST (5,10,0)
514 Safefree (PL_retstack); 687 Safefree (PL_retstack);
515#endif 688#endif
516} 689}
517 690
518static void 691static size_t
519allocate_stack (Coro__State ctx, int alloc) 692coro_rss (pTHX_ struct coro *coro)
520{ 693{
521 coro_stack *stack; 694 size_t rss = sizeof (*coro);
522 695
523 New (0, stack, 1, coro_stack); 696 if (coro->mainstack)
524
525 stack->refcnt = 1;
526 stack->usecnt = 1;
527 stack->gencnt = ctx->gencnt = 0;
528
529 if (alloc)
530 { 697 {
531#if HAVE_MMAP 698 perl_slots tmp_slot;
532 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */ 699 perl_slots *slot;
533 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 700
534 if (stack->sptr == (void *)-1) 701 if (coro->flags & CF_RUNNING)
535#endif
536 { 702 {
537 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 703 slot = &tmp_slot;
538 New (0, stack->sptr, STACKSIZE, long); 704
705 #define VAR(name,type) slot->name = PL_ ## name;
706 # include "state.h"
707 #undef VAR
539 } 708 }
540 }
541 else 709 else
542 stack->sptr = 0; 710 slot = coro->slot;
543 711
544 ctx->stack = stack; 712 if (slot)
545}
546
547static void
548deallocate_stack (Coro__State ctx)
549{
550 coro_stack *stack = ctx->stack;
551
552 ctx->stack = 0;
553
554 if (stack)
555 {
556 if (!--stack->refcnt)
557 { 713 {
558#ifdef HAVE_MMAP 714 rss += sizeof (slot->curstackinfo);
559 if (stack->ssize > 0 && stack->sptr) 715 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
560 munmap (stack->sptr, stack->ssize); 716 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
561 else 717 rss += slot->tmps_max * sizeof (SV *);
562#endif 718 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
563 Safefree (stack->sptr); 719 rss += slot->scopestack_max * sizeof (I32);
720 rss += slot->savestack_max * sizeof (ANY);
564 721
565 Safefree (stack); 722#if !PERL_VERSION_ATLEAST (5,10,0)
723 rss += slot->retstack_max * sizeof (OP *);
724#endif
566 } 725 }
567 else if (ctx->gencnt == stack->gencnt) 726 }
568 --stack->usecnt; 727
728 return rss;
729}
730
731/** coroutine stack handling ************************************************/
732
733static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
734static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
735static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
736
737/* apparently < 5.8.8 */
738#ifndef MgPV_nolen_const
739#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
740 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
741 (const char*)(mg)->mg_ptr)
742#endif
743
744/*
745 * This overrides the default magic get method of %SIG elements.
746 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
747 * and instead of tryign to save and restore the hash elements, we just provide
748 * readback here.
749 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
750 * not expecting this to actually change the hook. This is a potential problem
751 * when a schedule happens then, but we ignore this.
752 */
753static int
754coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
755{
756 const char *s = MgPV_nolen_const (mg);
757
758 if (*s == '_')
569 } 759 {
570} 760 SV **svp = 0;
571 761
762 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
763 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
764
765 if (svp)
766 {
767 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
768 return 0;
769 }
770 }
771
772 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
773}
774
572static void 775static int
573setup_coro (void *arg) 776coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
777{
778 const char *s = MgPV_nolen_const (mg);
779
780 if (*s == '_')
781 {
782 SV **svp = 0;
783
784 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
785 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
786
787 if (svp)
788 {
789 SV *old = *svp;
790 *svp = 0;
791 SvREFCNT_dec (old);
792 return 0;
793 }
794 }
795
796 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
797}
798
799static int
800coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
801{
802 const char *s = MgPV_nolen_const (mg);
803
804 if (*s == '_')
805 {
806 SV **svp = 0;
807
808 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
809 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
810
811 if (svp)
812 {
813 SV *old = *svp;
814 *svp = newSVsv (sv);
815 SvREFCNT_dec (old);
816 return 0;
817 }
818 }
819
820 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
821}
822
823static void
824prepare_nop (pTHX_ struct coro_transfer_args *ta)
825{
826 /* kind of mega-hacky, but works */
827 ta->next = ta->prev = (struct coro *)ta;
828}
829
830static int
831slf_check_nop (pTHX_ struct CoroSLF *frame)
832{
833 return 0;
834}
835
836static UNOP coro_setup_op;
837
838static void NOINLINE /* noinline to keep it out of the transfer fast path */
839coro_setup (pTHX_ struct coro *coro)
574{ 840{
575 /* 841 /*
576 * emulate part of the perl startup here. 842 * emulate part of the perl startup here.
577 */ 843 */
578 dTHX;
579 dSP;
580 Coro__State ctx = (Coro__State)arg;
581 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
582
583 coro_init_stacks (aTHX); 844 coro_init_stacks (aTHX);
584 /*PL_curcop = 0;*/ 845
585 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 846 PL_runops = RUNOPS_DEFAULT;
847 PL_curcop = &PL_compiling;
848 PL_in_eval = EVAL_NULL;
849 PL_comppad = 0;
850 PL_curpm = 0;
851 PL_curpad = 0;
852 PL_localizing = 0;
853 PL_dirty = 0;
854 PL_restartop = 0;
855#if PERL_VERSION_ATLEAST (5,10,0)
856 PL_parser = 0;
857#endif
858
859 /* recreate the die/warn hooks */
860 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
861 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
862
863 GvSV (PL_defgv) = newSV (0);
864 GvAV (PL_defgv) = coro->args; coro->args = 0;
865 GvSV (PL_errgv) = newSV (0);
866 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
867 PL_rs = newSVsv (GvSV (irsgv));
868 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
869
870 {
871 dSP;
872 UNOP myop;
873
874 Zero (&myop, 1, UNOP);
875 myop.op_next = Nullop;
876 myop.op_flags = OPf_WANT_VOID;
877
878 PUSHMARK (SP);
879 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
880 PUTBACK;
881 PL_op = (OP *)&myop;
882 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
883 SPAGAIN;
884 }
885
886 /* this newly created coroutine might be run on an existing cctx which most
887 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
888 */
889 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
890 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
891
892 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
893 coro_setup_op.op_next = PL_op;
894 coro_setup_op.op_type = OP_CUSTOM;
895 coro_setup_op.op_ppaddr = pp_slf;
896 /* no flags required, as an init function won't be called */
897
898 PL_op = (OP *)&coro_setup_op;
899
900 /* copy throw, in case it was set before coro_setup */
901 CORO_THROW = coro->except;
902}
903
904static void
905coro_destruct (pTHX_ struct coro *coro)
906{
907 if (!IN_DESTRUCT)
908 {
909 /* restore all saved variables and stuff */
910 LEAVE_SCOPE (0);
911 assert (PL_tmps_floor == -1);
912
913 /* free all temporaries */
914 FREETMPS;
915 assert (PL_tmps_ix == -1);
916
917 /* unwind all extra stacks */
918 POPSTACK_TO (PL_mainstack);
919
920 /* unwind main stack */
921 dounwind (-1);
922 }
923
924 SvREFCNT_dec (GvSV (PL_defgv));
586 SvREFCNT_dec (GvAV (PL_defgv)); 925 SvREFCNT_dec (GvAV (PL_defgv));
587 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 926 SvREFCNT_dec (GvSV (PL_errgv));
927 SvREFCNT_dec (PL_defoutgv);
928 SvREFCNT_dec (PL_rs);
929 SvREFCNT_dec (GvSV (irsgv));
588 930
589 SPAGAIN; 931 SvREFCNT_dec (PL_diehook);
932 SvREFCNT_dec (PL_warnhook);
933
934 SvREFCNT_dec (CORO_THROW);
935 SvREFCNT_dec (coro->saved_deffh);
936 SvREFCNT_dec (coro->rouse_cb);
590 937
591 if (ctx->stack) 938 coro_destruct_stacks (aTHX);
592 { 939}
593 ctx->cursp = 0;
594 940
595 PUSHMARK(SP); 941INLINE void
596 PUTBACK; 942free_coro_mortal (pTHX)
597 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 943{
598 944 if (expect_true (coro_mortal))
599 if (SvTRUE (ERRSV))
600 croak (NULL);
601 else
602 croak ("FATAL: CCTXT coroutine returned!");
603 } 945 {
604 else 946 SvREFCNT_dec (coro_mortal);
947 coro_mortal = 0;
605 { 948 }
606 UNOP myop; 949}
607 950
608 PL_op = (OP *)&myop; 951static int
952runops_trace (pTHX)
953{
954 COP *oldcop = 0;
955 int oldcxix = -2;
956 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
957 coro_cctx *cctx = coro->cctx;
609 958
610 Zero(&myop, 1, UNOP); 959 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
611 myop.op_next = Nullop;
612 myop.op_flags = OPf_WANT_VOID;
613
614 PUSHMARK(SP);
615 XPUSHs (sub_init);
616 /*
617 * the next line is slightly wrong, as PL_op->op_next
618 * is actually being executed so we skip the first op.
619 * that doesn't matter, though, since it is only
620 * pp_nextstate and we never return...
621 * ah yes, and I don't care anyways ;)
622 */
623 PUTBACK;
624 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
625 SPAGAIN;
626
627 ENTER; /* necessary e.g. for dounwind */
628 } 960 {
629} 961 PERL_ASYNC_CHECK ();
630 962
631static void 963 if (cctx->flags & CC_TRACE_ALL)
632continue_coro (void *arg)
633{
634 /*
635 * this is a _very_ stripped down perl interpreter ;)
636 */
637 dTHX;
638 Coro__State ctx = (Coro__State)arg;
639
640 PL_top_env = &ctx->start_env;
641
642 ctx->cursp = 0;
643 PL_op = PL_op->op_next;
644 CALLRUNOPS(aTHX);
645
646 abort ();
647}
648
649static void
650transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
651{
652 dSTACKLEVEL;
653
654 if (prev != next)
655 {
656 if (next->mainstack)
657 { 964 {
658 LOCK; 965 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
659 SAVE (prev, flags);
660 LOAD (next);
661 UNLOCK;
662
663 /* mark this state as in-use */
664 next->mainstack = 0;
665 next->tmps_ix = -2;
666
667 /* stacklevel changed? if yes, grab the stack for us! */
668 if (flags & TRANSFER_SAVE_CCTXT)
669 { 966 {
670 if (!prev->stack) 967 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
671 allocate_stack (prev, 0); 968 SV **bot, **top;
672 else if (prev->cursp != stacklevel 969 AV *av = newAV (); /* return values */
673 && prev->stack->usecnt > 1) 970 SV **cb;
971 dSP;
972
973 GV *gv = CvGV (cx->blk_sub.cv);
974 SV *fullname = sv_2mortal (newSV (0));
975 if (isGV (gv))
976 gv_efullname3 (fullname, gv, 0);
977
978 bot = PL_stack_base + cx->blk_oldsp + 1;
979 top = cx->blk_gimme == G_ARRAY ? SP + 1
980 : cx->blk_gimme == G_SCALAR ? bot + 1
981 : bot;
982
983 av_extend (av, top - bot);
984 while (bot < top)
985 av_push (av, SvREFCNT_inc_NN (*bot++));
986
987 PL_runops = RUNOPS_DEFAULT;
988 ENTER;
989 SAVETMPS;
990 EXTEND (SP, 3);
991 PUSHMARK (SP);
992 PUSHs (&PL_sv_no);
993 PUSHs (fullname);
994 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
995 PUTBACK;
996 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
997 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
998 SPAGAIN;
999 FREETMPS;
1000 LEAVE;
1001 PL_runops = runops_trace;
1002 }
1003
1004 if (oldcop != PL_curcop)
1005 {
1006 oldcop = PL_curcop;
1007
1008 if (PL_curcop != &PL_compiling)
674 { 1009 {
675 prev->gencnt = ++prev->stack->gencnt; 1010 SV **cb;
676 prev->stack->usecnt = 1;
677 }
678 1011
679 /* has our stack been invalidated? */ 1012 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
680 if (next->stack && next->stack->gencnt != next->gencnt)
681 { 1013 {
682 deallocate_stack (next); 1014 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
683 allocate_stack (next, 1); 1015
684 coro_create (&(next->stack->cctx), 1016 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
685 continue_coro, (void *)next, 1017 {
686 next->stack->sptr, labs (next->stack->ssize)); 1018 runops_proc_t old_runops = PL_runops;
1019 dSP;
1020 GV *gv = CvGV (cx->blk_sub.cv);
1021 SV *fullname = sv_2mortal (newSV (0));
1022
1023 if (isGV (gv))
1024 gv_efullname3 (fullname, gv, 0);
1025
1026 PL_runops = RUNOPS_DEFAULT;
1027 ENTER;
1028 SAVETMPS;
1029 EXTEND (SP, 3);
1030 PUSHMARK (SP);
1031 PUSHs (&PL_sv_yes);
1032 PUSHs (fullname);
1033 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1034 PUTBACK;
1035 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1036 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1037 SPAGAIN;
1038 FREETMPS;
1039 LEAVE;
1040 PL_runops = runops_trace;
1041 }
1042
1043 oldcxix = cxstack_ix;
687 } 1044 }
688 1045
689 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); 1046 if (cctx->flags & CC_TRACE_LINE)
690 prev->cursp = stacklevel;
691 /* don't add any code here */
692 }
693 else
694 next->cursp = stacklevel;
695 }
696 else if (next->tmps_ix == -2)
697 croak ("tried to transfer to running coroutine");
698 else
699 {
700 LOCK;
701 SAVE (prev, -1); /* first get rid of the old state */
702 UNLOCK;
703
704 if (flags & TRANSFER_SAVE_CCTXT)
705 {
706 if (!prev->stack)
707 allocate_stack (prev, 0);
708
709 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
710 { 1047 {
711 PL_top_env = &next->start_env; 1048 dSP;
712 1049
713 setup_coro (next); 1050 PL_runops = RUNOPS_DEFAULT;
714 next->cursp = stacklevel; 1051 ENTER;
715 1052 SAVETMPS;
716 prev->stack->refcnt++; 1053 EXTEND (SP, 3);
717 prev->stack->usecnt++; 1054 PL_runops = RUNOPS_DEFAULT;
718 next->stack = prev->stack; 1055 PUSHMARK (SP);
719 next->gencnt = prev->gencnt; 1056 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1057 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1058 PUTBACK;
1059 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1060 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1061 SPAGAIN;
1062 FREETMPS;
1063 LEAVE;
1064 PL_runops = runops_trace;
720 } 1065 }
721 else
722 {
723 assert (!next->stack);
724 allocate_stack (next, 1);
725 coro_create (&(next->stack->cctx),
726 setup_coro, (void *)next,
727 next->stack->sptr, labs (next->stack->ssize));
728 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
729 prev->cursp = stacklevel;
730 /* don't add any code here */
731 } 1066 }
732 } 1067 }
733 else
734 {
735 setup_coro (next);
736 next->cursp = stacklevel;
737 }
738 } 1068 }
739 } 1069 }
740 1070
741 LOCK; 1071 TAINT_NOT;
742 if (coro_mortal) 1072 return 0;
1073}
1074
1075static struct coro_cctx *cctx_ssl_cctx;
1076static struct CoroSLF cctx_ssl_frame;
1077
1078static void
1079slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1080{
1081 ta->prev = (struct coro *)cctx_ssl_cctx;
1082 ta->next = 0;
1083}
1084
1085static int
1086slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1087{
1088 *frame = cctx_ssl_frame;
1089
1090 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1091}
1092
1093/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1094static void NOINLINE
1095cctx_prepare (pTHX_ coro_cctx *cctx)
1096{
1097 PL_top_env = &PL_start_env;
1098
1099 if (cctx->flags & CC_TRACE)
1100 PL_runops = runops_trace;
1101
1102 /* we already must be executing an SLF op, there is no other valid way
1103 * that can lead to creation of a new cctx */
1104 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1105 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1106
1107 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1108 cctx_ssl_cctx = cctx;
1109 cctx_ssl_frame = slf_frame;
1110
1111 slf_frame.prepare = slf_prepare_set_stacklevel;
1112 slf_frame.check = slf_check_set_stacklevel;
1113}
1114
1115/* the tail of transfer: execute stuff we can only do after a transfer */
1116INLINE void
1117transfer_tail (pTHX)
1118{
1119 free_coro_mortal (aTHX);
1120}
1121
1122/*
1123 * this is a _very_ stripped down perl interpreter ;)
1124 */
1125static void
1126cctx_run (void *arg)
1127{
1128#ifdef USE_ITHREADS
1129# if CORO_PTHREAD
1130 PERL_SET_CONTEXT (coro_thx);
1131# endif
1132#endif
743 { 1133 {
744 SvREFCNT_dec (coro_mortal); 1134 dTHX;
745 coro_mortal = 0; 1135
1136 /* normally we would need to skip the entersub here */
1137 /* not doing so will re-execute it, which is exactly what we want */
1138 /* PL_nop = PL_nop->op_next */
1139
1140 /* inject a fake subroutine call to cctx_init */
1141 cctx_prepare (aTHX_ (coro_cctx *)arg);
1142
1143 /* cctx_run is the alternative tail of transfer() */
1144 transfer_tail (aTHX);
1145
1146 /* somebody or something will hit me for both perl_run and PL_restartop */
1147 PL_restartop = PL_op;
1148 perl_run (PL_curinterp);
1149
1150 /*
1151 * If perl-run returns we assume exit() was being called or the coro
1152 * fell off the end, which seems to be the only valid (non-bug)
1153 * reason for perl_run to return. We try to exit by jumping to the
1154 * bootstrap-time "top" top_env, as we cannot restore the "main"
1155 * coroutine as Coro has no such concept
1156 */
1157 PL_top_env = main_top_env;
1158 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1159 }
1160}
1161
1162static coro_cctx *
1163cctx_new ()
1164{
1165 coro_cctx *cctx;
1166
1167 ++cctx_count;
1168 New (0, cctx, 1, coro_cctx);
1169
1170 cctx->gen = cctx_gen;
1171 cctx->flags = 0;
1172 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1173
1174 return cctx;
1175}
1176
1177/* create a new cctx only suitable as source */
1178static coro_cctx *
1179cctx_new_empty ()
1180{
1181 coro_cctx *cctx = cctx_new ();
1182
1183 cctx->sptr = 0;
1184 coro_create (&cctx->cctx, 0, 0, 0, 0);
1185
1186 return cctx;
1187}
1188
1189/* create a new cctx suitable as destination/running a perl interpreter */
1190static coro_cctx *
1191cctx_new_run ()
1192{
1193 coro_cctx *cctx = cctx_new ();
1194 void *stack_start;
1195 size_t stack_size;
1196
1197#if HAVE_MMAP
1198 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1199 /* mmap supposedly does allocate-on-write for us */
1200 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1201
1202 if (cctx->sptr != (void *)-1)
746 } 1203 {
747 UNLOCK; 1204 #if CORO_STACKGUARD
748} 1205 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1206 #endif
1207 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1208 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1209 cctx->flags |= CC_MAPPED;
1210 }
1211 else
1212#endif
1213 {
1214 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1215 New (0, cctx->sptr, cctx_stacksize, long);
749 1216
750#define SV_CORO(sv,func) \ 1217 if (!cctx->sptr)
751 do { \ 1218 {
752 if (SvROK (sv)) \ 1219 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
753 sv = SvRV (sv); \ 1220 _exit (EXIT_FAILURE);
754 \ 1221 }
755 if (SvTYPE (sv) == SVt_PVHV) \
756 { \
757 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
758 \
759 if (!he) \
760 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
761 \
762 (sv) = SvRV (HeVAL(he)); \
763 } \
764 \
765 /* must also be changed inside Coro::Cont::yield */ \
766 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
767 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
768 \
769 } while(0)
770 1222
771#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 1223 stack_start = cctx->sptr;
1224 stack_size = cctx->ssize;
1225 }
772 1226
1227 #if CORO_USE_VALGRIND
1228 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1229 #endif
1230
1231 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1232
1233 return cctx;
1234}
1235
1236static void
1237cctx_destroy (coro_cctx *cctx)
1238{
1239 if (!cctx)
1240 return;
1241
1242 --cctx_count;
1243 coro_destroy (&cctx->cctx);
1244
1245 /* coro_transfer creates new, empty cctx's */
1246 if (cctx->sptr)
1247 {
1248 #if CORO_USE_VALGRIND
1249 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1250 #endif
1251
1252#if HAVE_MMAP
1253 if (cctx->flags & CC_MAPPED)
1254 munmap (cctx->sptr, cctx->ssize);
1255 else
1256#endif
1257 Safefree (cctx->sptr);
1258 }
1259
1260 Safefree (cctx);
1261}
1262
1263/* wether this cctx should be destructed */
1264#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1265
1266static coro_cctx *
1267cctx_get (pTHX)
1268{
1269 while (expect_true (cctx_first))
1270 {
1271 coro_cctx *cctx = cctx_first;
1272 cctx_first = cctx->next;
1273 --cctx_idle;
1274
1275 if (expect_true (!CCTX_EXPIRED (cctx)))
1276 return cctx;
1277
1278 cctx_destroy (cctx);
1279 }
1280
1281 return cctx_new_run ();
1282}
1283
1284static void
1285cctx_put (coro_cctx *cctx)
1286{
1287 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1288
1289 /* free another cctx if overlimit */
1290 if (expect_false (cctx_idle >= cctx_max_idle))
1291 {
1292 coro_cctx *first = cctx_first;
1293 cctx_first = first->next;
1294 --cctx_idle;
1295
1296 cctx_destroy (first);
1297 }
1298
1299 ++cctx_idle;
1300 cctx->next = cctx_first;
1301 cctx_first = cctx;
1302}
1303
1304/** coroutine switching *****************************************************/
1305
1306static void
1307transfer_check (pTHX_ struct coro *prev, struct coro *next)
1308{
1309 /* TODO: throwing up here is considered harmful */
1310
1311 if (expect_true (prev != next))
1312 {
1313 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1314 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1315
1316 if (expect_false (next->flags & CF_RUNNING))
1317 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1318
1319 if (expect_false (next->flags & CF_DESTROYED))
1320 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1321
1322#if !PERL_VERSION_ATLEAST (5,10,0)
1323 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1324 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1325#endif
1326 }
1327}
1328
1329/* always use the TRANSFER macro */
1330static void NOINLINE /* noinline so we have a fixed stackframe */
1331transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1332{
1333 dSTACKLEVEL;
1334
1335 /* sometimes transfer is only called to set idle_sp */
1336 if (expect_false (!next))
1337 {
1338 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1339 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1340 }
1341 else if (expect_true (prev != next))
1342 {
1343 coro_cctx *prev__cctx;
1344
1345 if (expect_false (prev->flags & CF_NEW))
1346 {
1347 /* create a new empty/source context */
1348 prev->cctx = cctx_new_empty ();
1349 prev->flags &= ~CF_NEW;
1350 prev->flags |= CF_RUNNING;
1351 }
1352
1353 prev->flags &= ~CF_RUNNING;
1354 next->flags |= CF_RUNNING;
1355
1356 /* first get rid of the old state */
1357 save_perl (aTHX_ prev);
1358
1359 if (expect_false (next->flags & CF_NEW))
1360 {
1361 /* need to start coroutine */
1362 next->flags &= ~CF_NEW;
1363 /* setup coroutine call */
1364 coro_setup (aTHX_ next);
1365 }
1366 else
1367 load_perl (aTHX_ next);
1368
1369 prev__cctx = prev->cctx;
1370
1371 /* possibly untie and reuse the cctx */
1372 if (expect_true (
1373 prev__cctx->idle_sp == STACKLEVEL
1374 && !(prev__cctx->flags & CC_TRACE)
1375 && !force_cctx
1376 ))
1377 {
1378 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1379 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1380
1381 prev->cctx = 0;
1382
1383 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1384 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1385 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1386 if (!next->cctx)
1387 next->cctx = cctx_get (aTHX);
1388
1389 cctx_put (prev__cctx);
1390 }
1391
1392 ++next->usecount;
1393
1394 if (expect_true (!next->cctx))
1395 next->cctx = cctx_get (aTHX);
1396
1397 if (expect_false (prev__cctx != next->cctx))
1398 {
1399 prev__cctx->top_env = PL_top_env;
1400 PL_top_env = next->cctx->top_env;
1401 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1402 }
1403
1404 transfer_tail (aTHX);
1405 }
1406}
1407
1408#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1409#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1410
1411/** high level stuff ********************************************************/
1412
773static void 1413static int
1414coro_state_destroy (pTHX_ struct coro *coro)
1415{
1416 if (coro->flags & CF_DESTROYED)
1417 return 0;
1418
1419 if (coro->on_destroy)
1420 coro->on_destroy (aTHX_ coro);
1421
1422 coro->flags |= CF_DESTROYED;
1423
1424 if (coro->flags & CF_READY)
1425 {
1426 /* reduce nready, as destroying a ready coro effectively unreadies it */
1427 /* alternative: look through all ready queues and remove the coro */
1428 --coro_nready;
1429 }
1430 else
1431 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1432
1433 if (coro->mainstack && coro->mainstack != main_mainstack)
1434 {
1435 struct coro temp;
1436
1437 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
1438
1439 save_perl (aTHX_ &temp);
1440 load_perl (aTHX_ coro);
1441
1442 coro_destruct (aTHX_ coro);
1443
1444 load_perl (aTHX_ &temp);
1445
1446 coro->slot = 0;
1447 }
1448
1449 cctx_destroy (coro->cctx);
1450 SvREFCNT_dec (coro->startcv);
1451 SvREFCNT_dec (coro->args);
1452
1453 if (coro->next) coro->next->prev = coro->prev;
1454 if (coro->prev) coro->prev->next = coro->next;
1455 if (coro == coro_first) coro_first = coro->next;
1456
1457 return 1;
1458}
1459
1460static int
1461coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1462{
1463 struct coro *coro = (struct coro *)mg->mg_ptr;
1464 mg->mg_ptr = 0;
1465
1466 coro->hv = 0;
1467
1468 if (--coro->refcnt < 0)
1469 {
1470 coro_state_destroy (aTHX_ coro);
1471 Safefree (coro);
1472 }
1473
1474 return 0;
1475}
1476
1477static int
1478coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1479{
1480 struct coro *coro = (struct coro *)mg->mg_ptr;
1481
1482 ++coro->refcnt;
1483
1484 return 0;
1485}
1486
1487static MGVTBL coro_state_vtbl = {
1488 0, 0, 0, 0,
1489 coro_state_free,
1490 0,
1491#ifdef MGf_DUP
1492 coro_state_dup,
1493#else
1494# define MGf_DUP 0
1495#endif
1496};
1497
1498static void
1499prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1500{
1501 ta->prev = SvSTATE (prev_sv);
1502 ta->next = SvSTATE (next_sv);
1503 TRANSFER_CHECK (*ta);
1504}
1505
1506static void
774api_transfer(pTHX_ SV *prev, SV *next, int flags) 1507api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
775{ 1508{
776 SV_CORO (prev, "Coro::transfer"); 1509 struct coro_transfer_args ta;
777 SV_CORO (next, "Coro::transfer");
778 1510
779 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1511 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1512 TRANSFER (ta, 1);
1513}
1514
1515/*****************************************************************************/
1516/* gensub: simple closure generation utility */
1517
1518#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1519
1520/* create a closure from XS, returns a code reference */
1521/* the arg can be accessed via GENSUB_ARG from the callback */
1522/* the callback must use dXSARGS/XSRETURN */
1523static SV *
1524gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1525{
1526 CV *cv = (CV *)newSV (0);
1527
1528 sv_upgrade ((SV *)cv, SVt_PVCV);
1529
1530 CvANON_on (cv);
1531 CvISXSUB_on (cv);
1532 CvXSUB (cv) = xsub;
1533 GENSUB_ARG = arg;
1534
1535 return newRV_noinc ((SV *)cv);
780} 1536}
781 1537
782/** Coro ********************************************************************/ 1538/** Coro ********************************************************************/
783 1539
784#define PRIO_MAX 3 1540INLINE void
785#define PRIO_HIGH 1 1541coro_enq (pTHX_ struct coro *coro)
786#define PRIO_NORMAL 0
787#define PRIO_LOW -1
788#define PRIO_IDLE -3
789#define PRIO_MIN -4
790
791/* for Coro.pm */
792static GV *coro_current, *coro_idle;
793static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
794static int coro_nready;
795
796static void
797coro_enq (pTHX_ SV *sv)
798{ 1542{
799 SV **xprio; 1543 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
1544}
1545
1546INLINE SV *
1547coro_deq (pTHX)
1548{
800 int prio; 1549 int prio;
801 1550
802 if (SvTYPE (sv) != SVt_PVHV) 1551 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
803 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1552 if (AvFILLp (coro_ready [prio]) >= 0)
1553 return av_shift (coro_ready [prio]);
804 1554
805 xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1555 return 0;
806 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1556}
807 1557
808 prio = prio > PRIO_MAX ? PRIO_MAX 1558static int
809 : prio < PRIO_MIN ? PRIO_MIN 1559api_ready (pTHX_ SV *coro_sv)
810 : prio; 1560{
1561 struct coro *coro;
1562 SV *sv_hook;
1563 void (*xs_hook)(void);
811 1564
812 av_push (coro_ready [prio - PRIO_MIN], sv); 1565 if (SvROK (coro_sv))
1566 coro_sv = SvRV (coro_sv);
1567
1568 coro = SvSTATE (coro_sv);
1569
1570 if (coro->flags & CF_READY)
1571 return 0;
1572
1573 coro->flags |= CF_READY;
1574
1575 sv_hook = coro_nready ? 0 : coro_readyhook;
1576 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1577
1578 coro_enq (aTHX_ coro);
813 coro_nready++; 1579 ++coro_nready;
1580
1581 if (sv_hook)
1582 {
1583 dSP;
1584
1585 ENTER;
1586 SAVETMPS;
1587
1588 PUSHMARK (SP);
1589 PUTBACK;
1590 call_sv (sv_hook, G_VOID | G_DISCARD);
1591
1592 FREETMPS;
1593 LEAVE;
1594 }
1595
1596 if (xs_hook)
1597 xs_hook ();
1598
1599 return 1;
1600}
1601
1602static int
1603api_is_ready (pTHX_ SV *coro_sv)
1604{
1605 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1606}
1607
1608INLINE void
1609prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1610{
1611 SV *prev_sv, *next_sv;
1612
1613 for (;;)
1614 {
1615 next_sv = coro_deq (aTHX);
1616
1617 /* nothing to schedule: call the idle handler */
1618 if (expect_false (!next_sv))
1619 {
1620 dSP;
1621
1622 ENTER;
1623 SAVETMPS;
1624
1625 PUSHMARK (SP);
1626 PUTBACK;
1627 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1628
1629 FREETMPS;
1630 LEAVE;
1631 continue;
1632 }
1633
1634 ta->next = SvSTATE_hv (next_sv);
1635
1636 /* cannot transfer to destroyed coros, skip and look for next */
1637 if (expect_false (ta->next->flags & CF_DESTROYED))
1638 {
1639 SvREFCNT_dec (next_sv);
1640 /* coro_nready has already been taken care of by destroy */
1641 continue;
1642 }
1643
1644 --coro_nready;
1645 break;
1646 }
1647
1648 /* free this only after the transfer */
1649 prev_sv = SvRV (coro_current);
1650 ta->prev = SvSTATE_hv (prev_sv);
1651 TRANSFER_CHECK (*ta);
1652 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1653 ta->next->flags &= ~CF_READY;
1654 SvRV_set (coro_current, next_sv);
1655
1656 free_coro_mortal (aTHX);
1657 coro_mortal = prev_sv;
1658}
1659
1660INLINE void
1661prepare_cede (pTHX_ struct coro_transfer_args *ta)
1662{
1663 api_ready (aTHX_ coro_current);
1664 prepare_schedule (aTHX_ ta);
1665}
1666
1667INLINE void
1668prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1669{
1670 SV *prev = SvRV (coro_current);
1671
1672 if (coro_nready)
1673 {
1674 prepare_schedule (aTHX_ ta);
1675 api_ready (aTHX_ prev);
1676 }
1677 else
1678 prepare_nop (aTHX_ ta);
1679}
1680
1681static void
1682api_schedule (pTHX)
1683{
1684 struct coro_transfer_args ta;
1685
1686 prepare_schedule (aTHX_ &ta);
1687 TRANSFER (ta, 1);
1688}
1689
1690static int
1691api_cede (pTHX)
1692{
1693 struct coro_transfer_args ta;
1694
1695 prepare_cede (aTHX_ &ta);
1696
1697 if (expect_true (ta.prev != ta.next))
1698 {
1699 TRANSFER (ta, 1);
1700 return 1;
1701 }
1702 else
1703 return 0;
1704}
1705
1706static int
1707api_cede_notself (pTHX)
1708{
1709 if (coro_nready)
1710 {
1711 struct coro_transfer_args ta;
1712
1713 prepare_cede_notself (aTHX_ &ta);
1714 TRANSFER (ta, 1);
1715 return 1;
1716 }
1717 else
1718 return 0;
1719}
1720
1721static void
1722api_trace (pTHX_ SV *coro_sv, int flags)
1723{
1724 struct coro *coro = SvSTATE (coro_sv);
1725
1726 if (flags & CC_TRACE)
1727 {
1728 if (!coro->cctx)
1729 coro->cctx = cctx_new_run ();
1730 else if (!(coro->cctx->flags & CC_TRACE))
1731 croak ("cannot enable tracing on coroutine with custom stack,");
1732
1733 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1734 }
1735 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1736 {
1737 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1738
1739 if (coro->flags & CF_RUNNING)
1740 PL_runops = RUNOPS_DEFAULT;
1741 else
1742 coro->slot->runops = RUNOPS_DEFAULT;
1743 }
1744}
1745
1746/*****************************************************************************/
1747/* rouse callback */
1748
1749#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1750
1751static void
1752coro_rouse_callback (pTHX_ CV *cv)
1753{
1754 dXSARGS;
1755 SV *data = (SV *)GENSUB_ARG;
1756
1757 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1758 {
1759 /* first call, set args */
1760 int i;
1761 AV *av = newAV ();
1762 SV *coro = SvRV (data);
1763
1764 SvRV_set (data, (SV *)av);
1765 api_ready (aTHX_ coro);
1766 SvREFCNT_dec (coro);
1767
1768 /* better take a full copy of the arguments */
1769 while (items--)
1770 av_store (av, items, newSVsv (ST (items)));
1771 }
1772
1773 XSRETURN_EMPTY;
1774}
1775
1776static int
1777slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1778{
1779 SV *data = (SV *)frame->data;
1780
1781 if (CORO_THROW)
1782 return 0;
1783
1784 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1785 return 1;
1786
1787 /* now push all results on the stack */
1788 {
1789 dSP;
1790 AV *av = (AV *)SvRV (data);
1791 int i;
1792
1793 EXTEND (SP, AvFILLp (av) + 1);
1794 for (i = 0; i <= AvFILLp (av); ++i)
1795 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1796
1797 /* we have stolen the elements, so ste length to zero and free */
1798 AvFILLp (av) = -1;
1799 av_undef (av);
1800
1801 PUTBACK;
1802 }
1803
1804 return 0;
1805}
1806
1807static void
1808slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1809{
1810 SV *cb;
1811
1812 if (items)
1813 cb = arg [0];
1814 else
1815 {
1816 struct coro *coro = SvSTATE_current;
1817
1818 if (!coro->rouse_cb)
1819 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1820
1821 cb = sv_2mortal (coro->rouse_cb);
1822 coro->rouse_cb = 0;
1823 }
1824
1825 if (!SvROK (cb)
1826 || SvTYPE (SvRV (cb)) != SVt_PVCV
1827 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1828 croak ("Coro::rouse_wait called with illegal callback argument,");
1829
1830 {
1831 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1832 SV *data = (SV *)GENSUB_ARG;
1833
1834 frame->data = (void *)data;
1835 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
1836 frame->check = slf_check_rouse_wait;
1837 }
814} 1838}
815 1839
816static SV * 1840static SV *
817coro_deq (pTHX_ int min_prio) 1841coro_new_rouse_cb (pTHX)
818{ 1842{
819 int prio = PRIO_MAX - PRIO_MIN; 1843 HV *hv = (HV *)SvRV (coro_current);
1844 struct coro *coro = SvSTATE_hv (hv);
1845 SV *data = newRV_inc ((SV *)hv);
1846 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
820 1847
821 min_prio -= PRIO_MIN; 1848 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
822 if (min_prio < 0) 1849 SvREFCNT_dec (data); /* magicext increases the refcount */
823 min_prio = 0;
824 1850
825 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1851 SvREFCNT_dec (coro->rouse_cb);
826 if (av_len (coro_ready[prio]) >= 0) 1852 coro->rouse_cb = SvREFCNT_inc_NN (cb);
1853
1854 return cb;
1855}
1856
1857/*****************************************************************************/
1858/* schedule-like-function opcode (SLF) */
1859
1860static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
1861static const CV *slf_cv;
1862static SV **slf_argv;
1863static int slf_argc, slf_arga; /* count, allocated */
1864static I32 slf_ax; /* top of stack, for restore */
1865
1866/* this restores the stack in the case we patched the entersub, to */
1867/* recreate the stack frame as perl will on following calls */
1868/* since entersub cleared the stack */
1869static OP *
1870pp_restore (pTHX)
1871{
1872 int i;
1873 SV **SP = PL_stack_base + slf_ax;
1874
1875 PUSHMARK (SP);
1876
1877 EXTEND (SP, slf_argc + 1);
1878
1879 for (i = 0; i < slf_argc; ++i)
1880 PUSHs (sv_2mortal (slf_argv [i]));
1881
1882 PUSHs ((SV *)CvGV (slf_cv));
1883
1884 RETURNOP (slf_restore.op_first);
1885}
1886
1887static void
1888slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
1889{
1890 SV **arg = (SV **)slf_frame.data;
1891
1892 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
1893}
1894
1895static void
1896slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1897{
1898 if (items != 2)
1899 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
1900
1901 frame->prepare = slf_prepare_transfer;
1902 frame->check = slf_check_nop;
1903 frame->data = (void *)arg; /* let's hope it will stay valid */
1904}
1905
1906static void
1907slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1908{
1909 frame->prepare = prepare_schedule;
1910 frame->check = slf_check_nop;
1911}
1912
1913static void
1914slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1915{
1916 frame->prepare = prepare_cede;
1917 frame->check = slf_check_nop;
1918}
1919
1920static void
1921slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1922{
1923 frame->prepare = prepare_cede_notself;
1924 frame->check = slf_check_nop;
1925}
1926
1927/*
1928 * these not obviously related functions are all rolled into one
1929 * function to increase chances that they all will call transfer with the same
1930 * stack offset
1931 * SLF stands for "schedule-like-function".
1932 */
1933static OP *
1934pp_slf (pTHX)
1935{
1936 I32 checkmark; /* mark SP to see how many elements check has pushed */
1937
1938 /* set up the slf frame, unless it has already been set-up */
1939 /* the latter happens when a new coro has been started */
1940 /* or when a new cctx was attached to an existing coroutine */
1941 if (expect_true (!slf_frame.prepare))
1942 {
1943 /* first iteration */
1944 dSP;
1945 SV **arg = PL_stack_base + TOPMARK + 1;
1946 int items = SP - arg; /* args without function object */
1947 SV *gv = *sp;
1948
1949 /* do a quick consistency check on the "function" object, and if it isn't */
1950 /* for us, divert to the real entersub */
1951 if (SvTYPE (gv) != SVt_PVGV
1952 || !GvCV (gv)
1953 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
1954 return PL_ppaddr[OP_ENTERSUB](aTHX);
1955
1956 if (!(PL_op->op_flags & OPf_STACKED))
827 { 1957 {
828 coro_nready--; 1958 /* ampersand-form of call, use @_ instead of stack */
829 return av_shift (coro_ready[prio]); 1959 AV *av = GvAV (PL_defgv);
1960 arg = AvARRAY (av);
1961 items = AvFILLp (av) + 1;
830 } 1962 }
1963
1964 /* now call the init function, which needs to set up slf_frame */
1965 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
1966 (aTHX_ &slf_frame, GvCV (gv), arg, items);
1967
1968 /* pop args */
1969 SP = PL_stack_base + POPMARK;
1970
1971 PUTBACK;
1972 }
1973
1974 /* now that we have a slf_frame, interpret it! */
1975 /* we use a callback system not to make the code needlessly */
1976 /* complicated, but so we can run multiple perl coros from one cctx */
1977
1978 do
1979 {
1980 struct coro_transfer_args ta;
1981
1982 slf_frame.prepare (aTHX_ &ta);
1983 TRANSFER (ta, 0);
1984
1985 checkmark = PL_stack_sp - PL_stack_base;
1986 }
1987 while (slf_frame.check (aTHX_ &slf_frame));
1988
1989 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
1990
1991 /* exception handling */
1992 if (expect_false (CORO_THROW))
1993 {
1994 SV *exception = sv_2mortal (CORO_THROW);
1995
1996 CORO_THROW = 0;
1997 sv_setsv (ERRSV, exception);
1998 croak (0);
1999 }
2000
2001 /* return value handling - mostly like entersub */
2002 /* make sure we put something on the stack in scalar context */
2003 if (GIMME_V == G_SCALAR)
2004 {
2005 dSP;
2006 SV **bot = PL_stack_base + checkmark;
2007
2008 if (sp == bot) /* too few, push undef */
2009 bot [1] = &PL_sv_undef;
2010 else if (sp != bot + 1) /* too many, take last one */
2011 bot [1] = *sp;
2012
2013 SP = bot + 1;
2014
2015 PUTBACK;
2016 }
2017
2018 return NORMAL;
2019}
2020
2021static void
2022api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2023{
2024 int i;
2025 SV **arg = PL_stack_base + ax;
2026 int items = PL_stack_sp - arg + 1;
2027
2028 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2029
2030 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2031 && PL_op->op_ppaddr != pp_slf)
2032 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2033
2034 CvFLAGS (cv) |= CVf_SLF;
2035 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2036 slf_cv = cv;
2037
2038 /* we patch the op, and then re-run the whole call */
2039 /* we have to put the same argument on the stack for this to work */
2040 /* and this will be done by pp_restore */
2041 slf_restore.op_next = (OP *)&slf_restore;
2042 slf_restore.op_type = OP_CUSTOM;
2043 slf_restore.op_ppaddr = pp_restore;
2044 slf_restore.op_first = PL_op;
2045
2046 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2047
2048 if (PL_op->op_flags & OPf_STACKED)
2049 {
2050 if (items > slf_arga)
2051 {
2052 slf_arga = items;
2053 free (slf_argv);
2054 slf_argv = malloc (slf_arga * sizeof (SV *));
2055 }
2056
2057 slf_argc = items;
2058
2059 for (i = 0; i < items; ++i)
2060 slf_argv [i] = SvREFCNT_inc (arg [i]);
2061 }
2062 else
2063 slf_argc = 0;
2064
2065 PL_op->op_ppaddr = pp_slf;
2066 PL_op->op_type = OP_CUSTOM; /* maybe we should leave it at entersub? */
2067
2068 PL_op = (OP *)&slf_restore;
2069}
2070
2071/*****************************************************************************/
2072/* PerlIO::cede */
2073
2074typedef struct
2075{
2076 PerlIOBuf base;
2077 NV next, every;
2078} PerlIOCede;
2079
2080static IV
2081PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2082{
2083 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2084
2085 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2086 self->next = nvtime () + self->every;
2087
2088 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2089}
2090
2091static SV *
2092PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2093{
2094 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2095
2096 return newSVnv (self->every);
2097}
2098
2099static IV
2100PerlIOCede_flush (pTHX_ PerlIO *f)
2101{
2102 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2103 double now = nvtime ();
2104
2105 if (now >= self->next)
2106 {
2107 api_cede (aTHX);
2108 self->next = now + self->every;
2109 }
2110
2111 return PerlIOBuf_flush (aTHX_ f);
2112}
2113
2114static PerlIO_funcs PerlIO_cede =
2115{
2116 sizeof(PerlIO_funcs),
2117 "cede",
2118 sizeof(PerlIOCede),
2119 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2120 PerlIOCede_pushed,
2121 PerlIOBuf_popped,
2122 PerlIOBuf_open,
2123 PerlIOBase_binmode,
2124 PerlIOCede_getarg,
2125 PerlIOBase_fileno,
2126 PerlIOBuf_dup,
2127 PerlIOBuf_read,
2128 PerlIOBuf_unread,
2129 PerlIOBuf_write,
2130 PerlIOBuf_seek,
2131 PerlIOBuf_tell,
2132 PerlIOBuf_close,
2133 PerlIOCede_flush,
2134 PerlIOBuf_fill,
2135 PerlIOBase_eof,
2136 PerlIOBase_error,
2137 PerlIOBase_clearerr,
2138 PerlIOBase_setlinebuf,
2139 PerlIOBuf_get_base,
2140 PerlIOBuf_bufsiz,
2141 PerlIOBuf_get_ptr,
2142 PerlIOBuf_get_cnt,
2143 PerlIOBuf_set_ptrcnt,
2144};
2145
2146/*****************************************************************************/
2147/* Coro::Semaphore & Coro::Signal */
2148
2149static SV *
2150coro_waitarray_new (pTHX_ int count)
2151{
2152 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2153 AV *av = newAV ();
2154 SV **ary;
2155
2156 /* unfortunately, building manually saves memory */
2157 Newx (ary, 2, SV *);
2158 AvALLOC (av) = ary;
2159 /*AvARRAY (av) = ary;*/
2160 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2161 AvMAX (av) = 1;
2162 AvFILLp (av) = 0;
2163 ary [0] = newSViv (count);
2164
2165 return newRV_noinc ((SV *)av);
2166}
2167
2168/* semaphore */
2169
2170static void
2171coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2172{
2173 SV *count_sv = AvARRAY (av)[0];
2174 IV count = SvIVX (count_sv);
2175
2176 count += adjust;
2177 SvIVX (count_sv) = count;
2178
2179 /* now wake up as many waiters as are expected to lock */
2180 while (count > 0 && AvFILLp (av) > 0)
2181 {
2182 SV *cb;
2183
2184 /* swap first two elements so we can shift a waiter */
2185 AvARRAY (av)[0] = AvARRAY (av)[1];
2186 AvARRAY (av)[1] = count_sv;
2187 cb = av_shift (av);
2188
2189 if (SvOBJECT (cb))
2190 {
2191 api_ready (aTHX_ cb);
2192 --count;
2193 }
2194 else if (SvTYPE (cb) == SVt_PVCV)
2195 {
2196 dSP;
2197 PUSHMARK (SP);
2198 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2199 PUTBACK;
2200 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2201 }
2202
2203 SvREFCNT_dec (cb);
2204 }
2205}
2206
2207static void
2208coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2209{
2210 /* call $sem->adjust (0) to possibly wake up some other waiters */
2211 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2212}
2213
2214static int
2215slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2216{
2217 AV *av = (AV *)frame->data;
2218 SV *count_sv = AvARRAY (av)[0];
2219
2220 /* if we are about to throw, don't actually acquire the lock, just throw */
2221 if (CORO_THROW)
2222 return 0;
2223 else if (SvIVX (count_sv) > 0)
2224 {
2225 SvSTATE_current->on_destroy = 0;
2226
2227 if (acquire)
2228 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2229 else
2230 coro_semaphore_adjust (aTHX_ av, 0);
2231
2232 return 0;
2233 }
2234 else
2235 {
2236 int i;
2237 /* if we were woken up but can't down, we look through the whole */
2238 /* waiters list and only add us if we aren't in there already */
2239 /* this avoids some degenerate memory usage cases */
2240
2241 for (i = 1; i <= AvFILLp (av); ++i)
2242 if (AvARRAY (av)[i] == SvRV (coro_current))
2243 return 1;
2244
2245 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2246 return 1;
2247 }
2248}
2249
2250static int
2251slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2252{
2253 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2254}
2255
2256static int
2257slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2258{
2259 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2260}
2261
2262static void
2263slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2264{
2265 AV *av = (AV *)SvRV (arg [0]);
2266
2267 if (SvIVX (AvARRAY (av)[0]) > 0)
2268 {
2269 frame->data = (void *)av;
2270 frame->prepare = prepare_nop;
2271 }
2272 else
2273 {
2274 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2275
2276 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2277 frame->prepare = prepare_schedule;
2278
2279 /* to avoid race conditions when a woken-up coro gets terminated */
2280 /* we arrange for a temporary on_destroy that calls adjust (0) */
2281 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2282 }
2283}
2284
2285static void
2286slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2287{
2288 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2289 frame->check = slf_check_semaphore_down;
2290}
2291
2292static void
2293slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2294{
2295 if (items >= 2)
2296 {
2297 /* callback form */
2298 AV *av = (AV *)SvRV (arg [0]);
2299 CV *cb_cv = coro_sv_2cv (arg [1]);
2300
2301 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2302
2303 if (SvIVX (AvARRAY (av)[0]) > 0)
2304 coro_semaphore_adjust (aTHX_ av, 0);
2305
2306 frame->prepare = prepare_nop;
2307 frame->check = slf_check_nop;
2308 }
2309 else
2310 {
2311 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2312 frame->check = slf_check_semaphore_wait;
2313 }
2314}
2315
2316/* signal */
2317
2318static void
2319coro_signal_wake (pTHX_ AV *av, int count)
2320{
2321 SvIVX (AvARRAY (av)[0]) = 0;
2322
2323 /* now signal count waiters */
2324 while (count > 0 && AvFILLp (av) > 0)
2325 {
2326 SV *cb;
2327
2328 /* swap first two elements so we can shift a waiter */
2329 cb = AvARRAY (av)[0];
2330 AvARRAY (av)[0] = AvARRAY (av)[1];
2331 AvARRAY (av)[1] = cb;
2332
2333 cb = av_shift (av);
2334
2335 api_ready (aTHX_ cb);
2336 sv_setiv (cb, 0); /* signal waiter */
2337 SvREFCNT_dec (cb);
2338
2339 --count;
2340 }
2341}
2342
2343static int
2344slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2345{
2346 /* if we are about to throw, also stop waiting */
2347 return SvROK ((SV *)frame->data) && !CORO_THROW;
2348}
2349
2350static void
2351slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2352{
2353 AV *av = (AV *)SvRV (arg [0]);
2354
2355 if (SvIVX (AvARRAY (av)[0]))
2356 {
2357 SvIVX (AvARRAY (av)[0]) = 0;
2358 frame->prepare = prepare_nop;
2359 frame->check = slf_check_nop;
2360 }
2361 else
2362 {
2363 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2364
2365 av_push (av, waiter);
2366
2367 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2368 frame->prepare = prepare_schedule;
2369 frame->check = slf_check_signal_wait;
2370 }
2371}
2372
2373/*****************************************************************************/
2374/* Coro::AIO */
2375
2376#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2377
2378/* helper storage struct */
2379struct io_state
2380{
2381 int errorno;
2382 I32 laststype; /* U16 in 5.10.0 */
2383 int laststatval;
2384 Stat_t statcache;
2385};
2386
2387static void
2388coro_aio_callback (pTHX_ CV *cv)
2389{
2390 dXSARGS;
2391 AV *state = (AV *)GENSUB_ARG;
2392 SV *coro = av_pop (state);
2393 SV *data_sv = newSV (sizeof (struct io_state));
2394
2395 av_extend (state, items);
2396
2397 sv_upgrade (data_sv, SVt_PV);
2398 SvCUR_set (data_sv, sizeof (struct io_state));
2399 SvPOK_only (data_sv);
2400
2401 {
2402 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2403
2404 data->errorno = errno;
2405 data->laststype = PL_laststype;
2406 data->laststatval = PL_laststatval;
2407 data->statcache = PL_statcache;
2408 }
2409
2410 /* now build the result vector out of all the parameters and the data_sv */
2411 {
2412 int i;
2413
2414 for (i = 0; i < items; ++i)
2415 av_push (state, SvREFCNT_inc_NN (ST (i)));
2416 }
2417
2418 av_push (state, data_sv);
2419
2420 api_ready (aTHX_ coro);
2421 SvREFCNT_dec (coro);
2422 SvREFCNT_dec ((AV *)state);
2423}
2424
2425static int
2426slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2427{
2428 AV *state = (AV *)frame->data;
2429
2430 /* if we are about to throw, return early */
2431 /* this does not cancel the aio request, but at least */
2432 /* it quickly returns */
2433 if (CORO_THROW)
2434 return 0;
2435
2436 /* one element that is an RV? repeat! */
2437 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2438 return 1;
2439
2440 /* restore status */
2441 {
2442 SV *data_sv = av_pop (state);
2443 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2444
2445 errno = data->errorno;
2446 PL_laststype = data->laststype;
2447 PL_laststatval = data->laststatval;
2448 PL_statcache = data->statcache;
2449
2450 SvREFCNT_dec (data_sv);
2451 }
2452
2453 /* push result values */
2454 {
2455 dSP;
2456 int i;
2457
2458 EXTEND (SP, AvFILLp (state) + 1);
2459 for (i = 0; i <= AvFILLp (state); ++i)
2460 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2461
2462 PUTBACK;
2463 }
831 2464
832 return 0; 2465 return 0;
833} 2466}
834 2467
835static void 2468static void
836api_ready (SV *coro) 2469slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
837{ 2470{
838 dTHX; 2471 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
839
840 if (SvROK (coro))
841 coro = SvRV (coro);
842
843 LOCK;
844 coro_enq (aTHX_ SvREFCNT_inc (coro));
845 UNLOCK;
846}
847
848static void
849api_schedule (void)
850{
851 dTHX;
852
853 SV *prev, *next;
854
855 LOCK;
856
857 prev = SvRV (GvSV (coro_current)); 2472 SV *coro_hv = SvRV (coro_current);
858 next = coro_deq (aTHX_ PRIO_MIN); 2473 struct coro *coro = SvSTATE_hv (coro_hv);
859 2474
860 if (!next) 2475 /* put our coroutine id on the state arg */
861 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2476 av_push (state, SvREFCNT_inc_NN (coro_hv));
862 2477
863 /* free this only after the transfer */ 2478 /* first see whether we have a non-zero priority and set it as AIO prio */
864 coro_mortal = prev; 2479 if (coro->prio)
865 SV_CORO (prev, "Coro::schedule"); 2480 {
2481 dSP;
866 2482
867 SvRV (GvSV (coro_current)) = next; 2483 static SV *prio_cv;
2484 static SV *prio_sv;
868 2485
869 SV_CORO (next, "Coro::schedule"); 2486 if (expect_false (!prio_cv))
2487 {
2488 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2489 prio_sv = newSViv (0);
2490 }
870 2491
871 UNLOCK; 2492 PUSHMARK (SP);
2493 sv_setiv (prio_sv, coro->prio);
2494 XPUSHs (prio_sv);
872 2495
873 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2496 PUTBACK;
874 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2497 call_sv (prio_cv, G_VOID | G_DISCARD);
875} 2498 }
876 2499
877static void 2500 /* now call the original request */
878api_cede (void) 2501 {
879{ 2502 dSP;
880 dTHX; 2503 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2504 int i;
881 2505
882 LOCK; 2506 PUSHMARK (SP);
883 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
884 UNLOCK;
885 2507
886 api_schedule (); 2508 /* first push all args to the stack */
887} 2509 EXTEND (SP, items + 1);
888 2510
2511 for (i = 0; i < items; ++i)
2512 PUSHs (arg [i]);
2513
2514 /* now push the callback closure */
2515 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2516
2517 /* now call the AIO function - we assume our request is uncancelable */
2518 PUTBACK;
2519 call_sv ((SV *)req, G_VOID | G_DISCARD);
2520 }
2521
2522 /* now that the requets is going, we loop toll we have a result */
2523 frame->data = (void *)state;
2524 frame->prepare = prepare_schedule;
2525 frame->check = slf_check_aio_req;
2526}
2527
2528static void
2529coro_aio_req_xs (pTHX_ CV *cv)
2530{
2531 dXSARGS;
2532
2533 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2534
2535 XSRETURN_EMPTY;
2536}
2537
2538/*****************************************************************************/
2539
889MODULE = Coro::State PACKAGE = Coro::State 2540MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
890 2541
891PROTOTYPES: ENABLE 2542PROTOTYPES: DISABLE
892 2543
893BOOT: 2544BOOT:
894{ /* {} necessary for stoopid perl-5.6.x */ 2545{
895#ifdef USE_ITHREADS 2546#ifdef USE_ITHREADS
896 MUTEX_INIT (&coro_mutex); 2547# if CORO_PTHREAD
2548 coro_thx = PERL_GET_CONTEXT;
897#endif 2549# endif
2550#endif
2551 BOOT_PAGESIZE;
898 2552
899 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2553 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
900 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2554 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2555
2556 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2557 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2558 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2559
2560 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2561 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2562 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2563
901 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2564 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
902 2565
903 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2566 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
904 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2567 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
905 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2568 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
906 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2569 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
907 2570
908 main_mainstack = PL_mainstack; 2571 main_mainstack = PL_mainstack;
2572 main_top_env = PL_top_env;
909 2573
2574 while (main_top_env->je_prev)
2575 main_top_env = main_top_env->je_prev;
2576
2577 {
2578 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2579
2580 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2581 hv_store_ent (PL_custom_op_names, slf,
2582 newSVpv ("coro_slf", 0), 0);
2583
2584 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2585 hv_store_ent (PL_custom_op_descs, slf,
2586 newSVpv ("coro schedule like function", 0), 0);
2587 }
2588
910 coroapi.ver = CORO_API_VERSION; 2589 coroapi.ver = CORO_API_VERSION;
2590 coroapi.rev = CORO_API_REVISION;
2591
911 coroapi.transfer = api_transfer; 2592 coroapi.transfer = api_transfer;
912}
913 2593
914Coro::State 2594 coroapi.sv_state = SvSTATE_;
915_newprocess(args) 2595 coroapi.execute_slf = api_execute_slf;
916 SV * args 2596 coroapi.prepare_nop = prepare_nop;
917 PROTOTYPE: $ 2597 coroapi.prepare_schedule = prepare_schedule;
2598 coroapi.prepare_cede = prepare_cede;
2599 coroapi.prepare_cede_notself = prepare_cede_notself;
2600
2601 {
2602 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2603
2604 if (!svp) croak ("Time::HiRes is required");
2605 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2606
2607 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2608 }
2609
2610 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
2611}
2612
2613SV *
2614new (char *klass, ...)
918 CODE: 2615 CODE:
919 Coro__State coro; 2616{
2617 struct coro *coro;
2618 MAGIC *mg;
2619 HV *hv;
2620 CV *cb;
2621 int i;
920 2622
921 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 2623 if (items > 1)
922 croak ("Coro::State::_newprocess expects an arrayref");
923 2624 {
2625 cb = coro_sv_2cv (ST (1));
2626
2627 if (CvISXSUB (cb))
2628 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2629
2630 if (!CvROOT (cb))
2631 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2632 }
2633
924 Newz (0, coro, 1, struct coro); 2634 Newz (0, coro, 1, struct coro);
2635 coro->args = newAV ();
2636 coro->flags = CF_NEW;
925 2637
926 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 2638 if (coro_first) coro_first->prev = coro;
927 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 2639 coro->next = coro_first;
928 /*coro->stack = 0;*/ 2640 coro_first = coro;
929 2641
930 /* same as JMPENV_BOOTSTRAP */ 2642 coro->hv = hv = newHV ();
931 /* we might be able to recycle start_env, but safe is safe */ 2643 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
932 /*Zero(&coro->start_env, 1, JMPENV);*/ 2644 mg->mg_flags |= MGf_DUP;
933 coro->start_env.je_ret = -1; 2645 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
934 coro->start_env.je_mustcatch = TRUE;
935 2646
936 RETVAL = coro; 2647 if (items > 1)
2648 {
2649 coro->startcv = SvREFCNT_inc_NN (cb);
2650
2651 av_extend (coro->args, items - 1);
2652 av_push (coro->args, SvREFCNT_inc (cb));
2653 for (i = 2; i < items; i++)
2654 av_push (coro->args, newSVsv (ST (i)));
2655 }
2656}
937 OUTPUT: 2657 OUTPUT:
938 RETVAL 2658 RETVAL
939 2659
940void 2660void
941transfer(prev, next, flags) 2661transfer (...)
942 SV *prev
943 SV *next
944 int flags
945 PROTOTYPE: @ 2662 PROTOTYPE: $$
946 CODE: 2663 CODE:
947 PUTBACK; 2664 CORO_EXECUTE_SLF_XS (slf_init_transfer);
948 SV_CORO (next, "Coro::transfer"); 2665
949 SV_CORO (prev, "Coro::transfer"); 2666bool
950 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2667_destroy (SV *coro_sv)
951 SPAGAIN; 2668 CODE:
2669 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
2670 OUTPUT:
2671 RETVAL
952 2672
953void 2673void
954DESTROY(coro)
955 Coro::State coro
956 CODE:
957
958 if (coro->mainstack && coro->mainstack != main_mainstack)
959 {
960 struct coro temp;
961
962 PUTBACK;
963 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
964 LOAD (aTHX_ coro);
965 SPAGAIN;
966
967 destroy_stacks (aTHX);
968
969 LOAD ((&temp)); /* this will get rid of defsv etc.. */
970 SPAGAIN;
971
972 coro->mainstack = 0;
973 }
974
975 deallocate_stack (coro);
976 SvREFCNT_dec (coro->args);
977 Safefree (coro);
978
979void
980_exit(code) 2674_exit (int code)
981 int code
982 PROTOTYPE: $ 2675 PROTOTYPE: $
983 CODE: 2676 CODE:
984 _exit (code); 2677 _exit (code);
985 2678
986MODULE = Coro::State PACKAGE = Coro::Cont 2679int
2680cctx_stacksize (int new_stacksize = 0)
2681 PROTOTYPE: ;$
2682 CODE:
2683 RETVAL = cctx_stacksize;
2684 if (new_stacksize)
2685 {
2686 cctx_stacksize = new_stacksize;
2687 ++cctx_gen;
2688 }
2689 OUTPUT:
2690 RETVAL
987 2691
988# this is slightly dirty (should expose a c-level api) 2692int
2693cctx_max_idle (int max_idle = 0)
2694 PROTOTYPE: ;$
2695 CODE:
2696 RETVAL = cctx_max_idle;
2697 if (max_idle > 1)
2698 cctx_max_idle = max_idle;
2699 OUTPUT:
2700 RETVAL
2701
2702int
2703cctx_count ()
2704 PROTOTYPE:
2705 CODE:
2706 RETVAL = cctx_count;
2707 OUTPUT:
2708 RETVAL
2709
2710int
2711cctx_idle ()
2712 PROTOTYPE:
2713 CODE:
2714 RETVAL = cctx_idle;
2715 OUTPUT:
2716 RETVAL
989 2717
990void 2718void
991yield(...) 2719list ()
992 PROTOTYPE: @ 2720 PROTOTYPE:
2721 PPCODE:
2722{
2723 struct coro *coro;
2724 for (coro = coro_first; coro; coro = coro->next)
2725 if (coro->hv)
2726 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2727}
2728
2729void
2730call (Coro::State coro, SV *coderef)
2731 ALIAS:
2732 eval = 1
2733 CODE:
2734{
2735 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2736 {
2737 struct coro temp;
2738
2739 if (!(coro->flags & CF_RUNNING))
2740 {
2741 PUTBACK;
2742 save_perl (aTHX_ &temp);
2743 load_perl (aTHX_ coro);
2744 }
2745
2746 {
2747 dSP;
2748 ENTER;
2749 SAVETMPS;
2750 PUTBACK;
2751 PUSHSTACK;
2752 PUSHMARK (SP);
2753
2754 if (ix)
2755 eval_sv (coderef, 0);
2756 else
2757 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2758
2759 POPSTACK;
2760 SPAGAIN;
2761 FREETMPS;
2762 LEAVE;
2763 PUTBACK;
2764 }
2765
2766 if (!(coro->flags & CF_RUNNING))
2767 {
2768 save_perl (aTHX_ coro);
2769 load_perl (aTHX_ &temp);
2770 SPAGAIN;
2771 }
2772 }
2773}
2774
2775SV *
2776is_ready (Coro::State coro)
2777 PROTOTYPE: $
2778 ALIAS:
2779 is_ready = CF_READY
2780 is_running = CF_RUNNING
2781 is_new = CF_NEW
2782 is_destroyed = CF_DESTROYED
2783 CODE:
2784 RETVAL = boolSV (coro->flags & ix);
2785 OUTPUT:
2786 RETVAL
2787
2788void
2789throw (Coro::State self, SV *throw = &PL_sv_undef)
2790 PROTOTYPE: $;$
993 CODE: 2791 CODE:
994 SV *yieldstack; 2792{
995 SV *sv; 2793 struct coro *current = SvSTATE_current;
996 AV *defav = GvAV (PL_defgv); 2794 SV **throwp = self == current ? &CORO_THROW : &self->except;
997 struct coro *prev, *next; 2795 SvREFCNT_dec (*throwp);
2796 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
2797}
998 2798
999 yieldstack = *hv_fetch ( 2799void
1000 (HV *)SvRV (GvSV (coro_current)), 2800api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1001 "yieldstack", sizeof ("yieldstack") - 1, 2801 PROTOTYPE: $;$
2802 C_ARGS: aTHX_ coro, flags
2803
2804SV *
2805has_cctx (Coro::State coro)
2806 PROTOTYPE: $
2807 CODE:
2808 RETVAL = boolSV (!!coro->cctx);
2809 OUTPUT:
2810 RETVAL
2811
2812int
2813is_traced (Coro::State coro)
2814 PROTOTYPE: $
2815 CODE:
2816 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2817 OUTPUT:
2818 RETVAL
2819
2820UV
2821rss (Coro::State coro)
2822 PROTOTYPE: $
2823 ALIAS:
2824 usecount = 1
2825 CODE:
2826 switch (ix)
2827 {
2828 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2829 case 1: RETVAL = coro->usecount; break;
1002 0 2830 }
2831 OUTPUT:
2832 RETVAL
2833
2834void
2835force_cctx ()
2836 PROTOTYPE:
2837 CODE:
2838 SvSTATE_current->cctx->idle_sp = 0;
2839
2840void
2841swap_defsv (Coro::State self)
2842 PROTOTYPE: $
2843 ALIAS:
2844 swap_defav = 1
2845 CODE:
2846 if (!self->slot)
2847 croak ("cannot swap state with coroutine that has no saved state,");
2848 else
1003 ); 2849 {
2850 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2851 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1004 2852
1005 /* set up @_ -- ugly */ 2853 SV *tmp = *src; *src = *dst; *dst = tmp;
1006 av_clear (defav); 2854 }
1007 av_fill (defav, items - 1);
1008 while (items--)
1009 av_store (defav, items, SvREFCNT_inc (ST(items)));
1010 2855
1011 sv = av_pop ((AV *)SvRV (yieldstack));
1012 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1013 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1014 SvREFCNT_dec (sv);
1015
1016 transfer (aTHX_ prev, next, 0);
1017 2856
1018MODULE = Coro::State PACKAGE = Coro 2857MODULE = Coro::State PACKAGE = Coro
1019 2858
1020# this is slightly dirty (should expose a c-level api)
1021
1022BOOT: 2859BOOT:
1023{ 2860{
1024 int i; 2861 int i;
2862
2863 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2864 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2865 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2866
2867 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2868 SvREADONLY_on (coro_current);
2869
1025 HV *stash = gv_stashpv ("Coro", TRUE); 2870 coro_stash = gv_stashpv ("Coro", TRUE);
1026 2871
1027 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2872 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1028 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2873 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1029 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2874 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1030 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2875 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1031 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2876 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1032 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2877 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1033
1034 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1035 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1036 2878
1037 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2879 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1038 coro_ready[i] = newAV (); 2880 coro_ready[i] = newAV ();
1039 2881
1040 { 2882 {
1041 SV *sv = perl_get_sv("Coro::API", 1); 2883 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1042 2884
1043 coroapi.schedule = api_schedule; 2885 coroapi.schedule = api_schedule;
1044 coroapi.cede = api_cede; 2886 coroapi.cede = api_cede;
2887 coroapi.cede_notself = api_cede_notself;
1045 coroapi.ready = api_ready; 2888 coroapi.ready = api_ready;
2889 coroapi.is_ready = api_is_ready;
1046 coroapi.nready = &coro_nready; 2890 coroapi.nready = coro_nready;
1047 coroapi.current = coro_current; 2891 coroapi.current = coro_current;
1048 2892
1049 GCoroAPI = &coroapi; 2893 /*GCoroAPI = &coroapi;*/
1050 sv_setiv(sv, (IV)&coroapi); 2894 sv_setiv (sv, (IV)&coroapi);
1051 SvREADONLY_on(sv); 2895 SvREADONLY_on (sv);
1052 } 2896 }
1053} 2897}
1054 2898
1055#if !PERL_MICRO
1056
1057void 2899void
1058ready(self) 2900schedule (...)
1059 SV * self 2901 CODE:
2902 CORO_EXECUTE_SLF_XS (slf_init_schedule);
2903
2904void
2905cede (...)
2906 CODE:
2907 CORO_EXECUTE_SLF_XS (slf_init_cede);
2908
2909void
2910cede_notself (...)
2911 CODE:
2912 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
2913
2914void
2915_set_current (SV *current)
1060 PROTOTYPE: $ 2916 PROTOTYPE: $
1061 CODE: 2917 CODE:
1062 api_ready (self); 2918 SvREFCNT_dec (SvRV (coro_current));
2919 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
1063 2920
1064#endif 2921void
2922_set_readyhook (SV *hook)
2923 PROTOTYPE: $
2924 CODE:
2925 SvREFCNT_dec (coro_readyhook);
2926 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1065 2927
1066int 2928int
2929prio (Coro::State coro, int newprio = 0)
2930 PROTOTYPE: $;$
2931 ALIAS:
2932 nice = 1
2933 CODE:
2934{
2935 RETVAL = coro->prio;
2936
2937 if (items > 1)
2938 {
2939 if (ix)
2940 newprio = coro->prio - newprio;
2941
2942 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2943 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2944
2945 coro->prio = newprio;
2946 }
2947}
2948 OUTPUT:
2949 RETVAL
2950
2951SV *
2952ready (SV *self)
2953 PROTOTYPE: $
2954 CODE:
2955 RETVAL = boolSV (api_ready (aTHX_ self));
2956 OUTPUT:
2957 RETVAL
2958
2959int
1067nready(...) 2960nready (...)
1068 PROTOTYPE: 2961 PROTOTYPE:
1069 CODE: 2962 CODE:
1070 RETVAL = coro_nready; 2963 RETVAL = coro_nready;
1071 OUTPUT: 2964 OUTPUT:
1072 RETVAL 2965 RETVAL
1073 2966
2967# for async_pool speedup
1074void 2968void
1075schedule(...) 2969_pool_1 (SV *cb)
1076 PROTOTYPE:
1077 CODE: 2970 CODE:
1078 api_schedule (); 2971{
2972 HV *hv = (HV *)SvRV (coro_current);
2973 struct coro *coro = SvSTATE_hv ((SV *)hv);
2974 AV *defav = GvAV (PL_defgv);
2975 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2976 AV *invoke_av;
2977 int i, len;
2978
2979 if (!invoke)
2980 {
2981 SV *old = PL_diehook;
2982 PL_diehook = 0;
2983 SvREFCNT_dec (old);
2984 croak ("\3async_pool terminate\2\n");
2985 }
2986
2987 SvREFCNT_dec (coro->saved_deffh);
2988 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2989
2990 hv_store (hv, "desc", sizeof ("desc") - 1,
2991 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2992
2993 invoke_av = (AV *)SvRV (invoke);
2994 len = av_len (invoke_av);
2995
2996 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2997
2998 if (len > 0)
2999 {
3000 av_fill (defav, len - 1);
3001 for (i = 0; i < len; ++i)
3002 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
3003 }
3004}
1079 3005
1080void 3006void
1081cede(...) 3007_pool_2 (SV *cb)
1082 PROTOTYPE:
1083 CODE: 3008 CODE:
1084 api_cede (); 3009{
3010 HV *hv = (HV *)SvRV (coro_current);
3011 struct coro *coro = SvSTATE_hv ((SV *)hv);
1085 3012
1086# and these are hacks 3013 sv_setsv (cb, &PL_sv_undef);
3014
3015 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
3016 coro->saved_deffh = 0;
3017
3018 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
3019 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
3020 {
3021 SV *old = PL_diehook;
3022 PL_diehook = 0;
3023 SvREFCNT_dec (old);
3024 croak ("\3async_pool terminate\2\n");
3025 }
3026
3027 av_clear (GvAV (PL_defgv));
3028 hv_store (hv, "desc", sizeof ("desc") - 1,
3029 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
3030
3031 coro->prio = 0;
3032
3033 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
3034 api_trace (aTHX_ coro_current, 0);
3035
3036 av_push (av_async_pool, newSVsv (coro_current));
3037}
3038
1087SV * 3039SV *
1088_aio_get_state () 3040rouse_cb ()
3041 PROTOTYPE:
1089 CODE: 3042 CODE:
1090{ 3043 RETVAL = coro_new_rouse_cb (aTHX);
1091 struct {
1092 int errorno;
1093 int laststype;
1094 int laststatval;
1095 Stat_t statcache;
1096 } data;
1097
1098 data.errorno = errno;
1099 data.laststype = PL_laststype;
1100 data.laststatval = PL_laststatval;
1101 data.statcache = PL_statcache;
1102
1103 RETVAL = newSVpvn ((char *)&data, sizeof data);
1104}
1105 OUTPUT: 3044 OUTPUT:
1106 RETVAL 3045 RETVAL
1107 3046
1108void 3047void
1109_aio_set_state (char *data_) 3048rouse_wait (...)
1110 PROTOTYPE: $ 3049 PROTOTYPE: ;$
3050 PPCODE:
3051 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3052
3053
3054MODULE = Coro::State PACKAGE = PerlIO::cede
3055
3056BOOT:
3057 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3058
3059
3060MODULE = Coro::State PACKAGE = Coro::Semaphore
3061
3062SV *
3063new (SV *klass, SV *count = 0)
1111 CODE: 3064 CODE:
3065 RETVAL = sv_bless (
3066 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3067 GvSTASH (CvGV (cv))
3068 );
3069 OUTPUT:
3070 RETVAL
3071
3072# helper for Coro::Channel
3073SV *
3074_alloc (int count)
3075 CODE:
3076 RETVAL = coro_waitarray_new (aTHX_ count);
3077 OUTPUT:
3078 RETVAL
3079
3080SV *
3081count (SV *self)
3082 CODE:
3083 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3084 OUTPUT:
3085 RETVAL
3086
3087void
3088up (SV *self, int adjust = 1)
3089 ALIAS:
3090 adjust = 1
3091 CODE:
3092 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3093
3094void
3095down (...)
3096 CODE:
3097 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3098
3099void
3100wait (...)
3101 CODE:
3102 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3103
3104void
3105try (SV *self)
3106 PPCODE:
1112{ 3107{
1113 struct { 3108 AV *av = (AV *)SvRV (self);
3109 SV *count_sv = AvARRAY (av)[0];
3110 IV count = SvIVX (count_sv);
3111
3112 if (count > 0)
3113 {
3114 --count;
3115 SvIVX (count_sv) = count;
3116 XSRETURN_YES;
3117 }
3118 else
3119 XSRETURN_NO;
3120}
3121
3122void
3123waiters (SV *self)
3124 PPCODE:
3125{
3126 AV *av = (AV *)SvRV (self);
3127 int wcount = AvFILLp (av) + 1 - 1;
3128
3129 if (GIMME_V == G_SCALAR)
3130 XPUSHs (sv_2mortal (newSViv (wcount)));
3131 else
3132 {
1114 int errorno; 3133 int i;
1115 int laststype; 3134 EXTEND (SP, wcount);
1116 int laststatval; 3135 for (i = 1; i <= wcount; ++i)
1117 Stat_t statcache; 3136 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1118 } *data = (void *)data_; 3137 }
1119
1120 errno = data->errorno;
1121 PL_laststype = data->laststype;
1122 PL_laststatval = data->laststatval;
1123 PL_statcache = data->statcache;
1124} 3138}
3139
3140MODULE = Coro::State PACKAGE = Coro::Signal
3141
3142SV *
3143new (SV *klass)
3144 CODE:
3145 RETVAL = sv_bless (
3146 coro_waitarray_new (aTHX_ 0),
3147 GvSTASH (CvGV (cv))
3148 );
3149 OUTPUT:
3150 RETVAL
3151
3152void
3153wait (...)
3154 CODE:
3155 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3156
3157void
3158broadcast (SV *self)
3159 CODE:
3160{
3161 AV *av = (AV *)SvRV (self);
3162 coro_signal_wake (aTHX_ av, AvFILLp (av));
3163}
3164
3165void
3166send (SV *self)
3167 CODE:
3168{
3169 AV *av = (AV *)SvRV (self);
3170
3171 if (AvFILLp (av))
3172 coro_signal_wake (aTHX_ av, 1);
3173 else
3174 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3175}
3176
3177IV
3178awaited (SV *self)
3179 CODE:
3180 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3181 OUTPUT:
3182 RETVAL
3183
3184
3185MODULE = Coro::State PACKAGE = Coro::AnyEvent
3186
3187BOOT:
3188 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3189
3190void
3191_schedule (...)
3192 CODE:
3193{
3194 static int incede;
3195
3196 api_cede_notself (aTHX);
3197
3198 ++incede;
3199 while (coro_nready >= incede && api_cede (aTHX))
3200 ;
3201
3202 sv_setsv (sv_activity, &PL_sv_undef);
3203 if (coro_nready >= incede)
3204 {
3205 PUSHMARK (SP);
3206 PUTBACK;
3207 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3208 }
3209
3210 --incede;
3211}
3212
3213
3214MODULE = Coro::State PACKAGE = Coro::AIO
3215
3216void
3217_register (char *target, char *proto, SV *req)
3218 CODE:
3219{
3220 CV *req_cv = coro_sv_2cv (req);
3221 /* newXSproto doesn't return the CV on 5.8 */
3222 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3223 sv_setpv ((SV *)slf_cv, proto);
3224 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3225}
3226

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