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Comparing Coro/Coro/State.xs (file contents):
Revision 1.107 by root, Mon Nov 27 02:15:51 2006 UTC vs.
Revision 1.322 by root, Sat Nov 22 05:13:34 2008 UTC

1#include "libcoro/coro.c" 1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
2 5
3#include "EXTERN.h" 6#include "EXTERN.h"
4#include "perl.h" 7#include "perl.h"
5#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
6 10
7#include "patchlevel.h" 11#include "patchlevel.h"
8
9#if USE_VALGRIND
10# include <valgrind/valgrind.h>
11#endif
12
13#define PERL_VERSION_ATLEAST(a,b,c) \
14 (PERL_REVISION > (a) \
15 || (PERL_REVISION == (a) \
16 && (PERL_VERSION > (b) \
17 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19#if !PERL_VERSION_ATLEAST (5,6,0)
20# ifndef PL_ppaddr
21# define PL_ppaddr ppaddr
22# endif
23# ifndef call_sv
24# define call_sv perl_call_sv
25# endif
26# ifndef get_sv
27# define get_sv perl_get_sv
28# endif
29# ifndef get_cv
30# define get_cv perl_get_cv
31# endif
32# ifndef IS_PADGV
33# define IS_PADGV(v) 0
34# endif
35# ifndef IS_PADCONST
36# define IS_PADCONST(v) 0
37# endif
38#endif
39 12
40#include <stdio.h> 13#include <stdio.h>
41#include <errno.h> 14#include <errno.h>
15#include <assert.h>
42 16
43#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 17#ifdef WIN32
44# undef STACKGUARD 18# undef setjmp
45#endif 19# undef longjmp
46 20# undef _exit
47#ifndef STACKGUARD 21# define setjmp _setjmp /* deep magic */
48# define STACKGUARD 0 22#else
23# include <inttypes.h> /* most portable stdint.h */
49#endif 24#endif
50 25
51#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
52# include <unistd.h> 27# include <unistd.h>
53# include <sys/mman.h> 28# include <sys/mman.h>
… …
69#else 44#else
70# define PAGESIZE 0 45# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0 46# define BOOT_PAGESIZE (void)0
72#endif 47#endif
73 48
74/* The next macro should declare a variable stacklevel that contains and approximation 49#if CORO_USE_VALGRIND
75 * to the current C stack pointer. Its property is that it changes with each call 50# include <valgrind/valgrind.h>
76 * and should be unique. */ 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) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
114
115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
116# undef CORO_STACKGUARD
117#endif
118
119#ifndef CORO_STACKGUARD
120# define CORO_STACKGUARD 0
121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
77#define dSTACKLEVEL int stacklevel 131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
78#define STACKLEVEL ((void *)&stacklevel) 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
79 137
80#define IN_DESTRUCT (PL_main_cv == Nullcv) 138#define IN_DESTRUCT (PL_main_cv == Nullcv)
81 139
82#if __GNUC__ >= 3 140#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x) 141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr),(value))
143# define INLINE static inline
84#else 144#else
85# define attribute(x) 145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
86#endif 148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
87 152
88#define NOINLINE attribute ((noinline)) 153#define NOINLINE attribute ((noinline))
89 154
90#include "CoroAPI.h" 155#include "CoroAPI.h"
91 156#define GCoroAPI (&coroapi) /* very sneaky */
92#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93 157
94#ifdef USE_ITHREADS 158#ifdef USE_ITHREADS
95static perl_mutex coro_mutex; 159# if CORO_PTHREAD
96# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 160static void *coro_thx;
97# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98#else
99# define LOCK (void)0
100# define UNLOCK (void)0
101#endif 161# endif
162#endif
102 163
164static double (*nvtime)(); /* so why doesn't it take void? */
165
166/* we hijack an hopefully unused CV flag for our purposes */
167#define CVf_SLF 0x4000
168static OP *pp_slf (pTHX);
169
170static U32 cctx_gen;
171static size_t cctx_stacksize = CORO_STACKSIZE;
103static struct CoroAPI coroapi; 172static struct CoroAPI coroapi;
104static AV *main_mainstack; /* used to differentiate between $main and others */ 173static AV *main_mainstack; /* used to differentiate between $main and others */
174static JMPENV *main_top_env;
105static HV *coro_state_stash, *coro_stash; 175static HV *coro_state_stash, *coro_stash;
106static SV *coro_mortal; /* will be freed after next transfer */ 176static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
177
178static AV *av_destroy; /* destruction queue */
179static SV *sv_manager; /* the manager coro */
180
181static GV *irsgv; /* $/ */
182static GV *stdoutgv; /* *STDOUT */
183static SV *rv_diehook;
184static SV *rv_warnhook;
185static HV *hv_sig; /* %SIG */
186
187/* async_pool helper stuff */
188static SV *sv_pool_rss;
189static SV *sv_pool_size;
190static SV *sv_async_pool_idle; /* description string */
191static AV *av_async_pool; /* idle pool */
192static SV *sv_Coro; /* class string */
193static CV *cv_pool_handler;
194static CV *cv_coro_state_new;
195
196/* Coro::AnyEvent */
197static SV *sv_activity;
107 198
108static struct coro_cctx *cctx_first; 199static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle; 200static int cctx_count, cctx_idle;
110 201
202enum {
203 CC_MAPPED = 0x01,
204 CC_NOREUSE = 0x02, /* throw this away after tracing */
205 CC_TRACE = 0x04,
206 CC_TRACE_SUB = 0x08, /* trace sub calls */
207 CC_TRACE_LINE = 0x10, /* trace each statement */
208 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
209};
210
111/* this is a structure representing a c-level coroutine */ 211/* this is a structure representing a c-level coroutine */
112typedef struct coro_cctx { 212typedef struct coro_cctx
213{
113 struct coro_cctx *next; 214 struct coro_cctx *next;
114 215
115 /* the stack */ 216 /* the stack */
116 void *sptr; 217 void *sptr;
117 long ssize; /* positive == mmap, otherwise malloc */ 218 size_t ssize;
118 219
119 /* cpu state */ 220 /* cpu state */
120 void *idle_sp; /* sp of top-level transfer/schedule/cede call */ 221 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
222 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121 JMPENV *top_env; 223 JMPENV *top_env;
122 coro_context cctx; 224 coro_context cctx;
123 225
226 U32 gen;
124#if USE_VALGRIND 227#if CORO_USE_VALGRIND
125 int valgrind_id; 228 int valgrind_id;
126#endif 229#endif
230 unsigned char flags;
127} coro_cctx; 231} coro_cctx;
232
233coro_cctx *cctx_current; /* the currently running cctx */
234
235/*****************************************************************************/
236
237enum {
238 CF_RUNNING = 0x0001, /* coroutine is running */
239 CF_READY = 0x0002, /* coroutine is ready */
240 CF_NEW = 0x0004, /* has never been switched to */
241 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
242};
243
244/* the structure where most of the perl state is stored, overlaid on the cxstack */
245typedef struct
246{
247 SV *defsv;
248 AV *defav;
249 SV *errsv;
250 SV *irsgv;
251#define VAR(name,type) type name;
252# include "state.h"
253#undef VAR
254} perl_slots;
255
256#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
128 257
129/* this is a structure representing a perl-level coroutine */ 258/* this is a structure representing a perl-level coroutine */
130struct coro { 259struct coro {
131 /* the c coroutine allocated to this perl coroutine, if any */ 260 /* the C coroutine allocated to this perl coroutine, if any */
132 coro_cctx *cctx; 261 coro_cctx *cctx;
133 262
134 /* data associated with this coroutine (initial args) */ 263 /* state data */
135 AV *args; 264 struct CoroSLF slf_frame; /* saved slf frame */
136 int refcnt;
137
138 /* optionally saved, might be zero */
139 AV *defav;
140 SV *defsv;
141 SV *errsv;
142
143 /* saved global state not related to stacks */
144 U8 dowarn;
145 I32 in_eval;
146
147 /* the stacks and related info (callchain etc..) */
148 PERL_SI *curstackinfo;
149 AV *curstack;
150 AV *mainstack; 265 AV *mainstack;
151 SV **stack_sp; 266 perl_slots *slot; /* basically the saved sp */
152 OP *op; 267
153 SV **curpad; 268 CV *startcv; /* the CV to execute */
154 AV *comppad; 269 AV *args; /* data associated with this coroutine (initial args) */
155 CV *compcv; 270 int refcnt; /* coroutines are refcounted, yes */
156 SV **stack_base; 271 int flags; /* CF_ flags */
157 SV **stack_max; 272 HV *hv; /* the perl hash associated with this coro, if any */
158 SV **tmps_stack; 273 void (*on_destroy)(pTHX_ struct coro *coro);
159 I32 tmps_floor; 274
160 I32 tmps_ix; 275 /* statistics */
161 I32 tmps_max; 276 int usecount; /* number of transfers to this coro */
162 I32 *markstack;
163 I32 *markstack_ptr;
164 I32 *markstack_max;
165 I32 *scopestack;
166 I32 scopestack_ix;
167 I32 scopestack_max;
168 ANY *savestack;
169 I32 savestack_ix;
170 I32 savestack_max;
171 OP **retstack;
172 I32 retstack_ix;
173 I32 retstack_max;
174 PMOP *curpm;
175 COP *curcop;
176 277
177 /* coro process data */ 278 /* coro process data */
178 int prio; 279 int prio;
280 SV *except; /* exception to be thrown */
281 SV *rouse_cb;
282
283 /* async_pool */
284 SV *saved_deffh;
285 SV *invoke_cb;
286 AV *invoke_av;
287
288 /* linked list */
289 struct coro *next, *prev;
179}; 290};
180 291
181typedef struct coro *Coro__State; 292typedef struct coro *Coro__State;
182typedef struct coro *Coro__State_or_hashref; 293typedef struct coro *Coro__State_or_hashref;
183 294
295/* the following variables are effectively part of the perl context */
296/* and get copied between struct coro and these variables */
297/* the mainr easonw e don't support windows process emulation */
298static struct CoroSLF slf_frame; /* the current slf frame */
299
300/** Coro ********************************************************************/
301
302#define PRIO_MAX 3
303#define PRIO_HIGH 1
304#define PRIO_NORMAL 0
305#define PRIO_LOW -1
306#define PRIO_IDLE -3
307#define PRIO_MIN -4
308
309/* for Coro.pm */
310static SV *coro_current;
311static SV *coro_readyhook;
312static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
313static CV *cv_coro_run, *cv_coro_terminate;
314static struct coro *coro_first;
315#define coro_nready coroapi.nready
316
317/** lowlevel stuff **********************************************************/
318
319static SV *
320coro_get_sv (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_sv (name, create);
325#endif
326 return get_sv (name, create);
327}
328
184static AV * 329static AV *
330coro_get_av (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_av (name, create);
335#endif
336 return get_av (name, create);
337}
338
339static HV *
340coro_get_hv (pTHX_ const char *name, int create)
341{
342#if PERL_VERSION_ATLEAST (5,10,0)
343 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
344 get_hv (name, create);
345#endif
346 return get_hv (name, create);
347}
348
349/* may croak */
350INLINE CV *
351coro_sv_2cv (pTHX_ SV *sv)
352{
353 HV *st;
354 GV *gvp;
355 return sv_2cv (sv, &st, &gvp, 0);
356}
357
358static AV *
185coro_clone_padlist (CV *cv) 359coro_derive_padlist (pTHX_ CV *cv)
186{ 360{
187 AV *padlist = CvPADLIST (cv); 361 AV *padlist = CvPADLIST (cv);
188 AV *newpadlist, *newpad; 362 AV *newpadlist, *newpad;
189 363
190 newpadlist = newAV (); 364 newpadlist = newAV ();
191 AvREAL_off (newpadlist); 365 AvREAL_off (newpadlist);
192#if PERL_VERSION_ATLEAST (5,9,0) 366#if PERL_VERSION_ATLEAST (5,10,0)
193 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1); 367 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
194#else 368#else
195 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 369 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
196#endif 370#endif
197 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 371 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
198 --AvFILLp (padlist); 372 --AvFILLp (padlist);
199 373
200 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 374 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
201 av_store (newpadlist, 1, (SV *)newpad); 375 av_store (newpadlist, 1, (SV *)newpad);
202 376
203 return newpadlist; 377 return newpadlist;
204} 378}
205 379
206static void 380static void
207free_padlist (AV *padlist) 381free_padlist (pTHX_ AV *padlist)
208{ 382{
209 /* may be during global destruction */ 383 /* may be during global destruction */
210 if (SvREFCNT (padlist)) 384 if (SvREFCNT (padlist))
211 { 385 {
212 I32 i = AvFILLp (padlist); 386 I32 i = AvFILLp (padlist);
… …
233 AV *padlist; 407 AV *padlist;
234 AV *av = (AV *)mg->mg_obj; 408 AV *av = (AV *)mg->mg_obj;
235 409
236 /* casting is fun. */ 410 /* casting is fun. */
237 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 411 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
238 free_padlist (padlist); 412 free_padlist (aTHX_ padlist);
239 413
240 SvREFCNT_dec (av); 414 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
241 415
242 return 0; 416 return 0;
243} 417}
244 418
419#define CORO_MAGIC_type_cv 26
245#define PERL_MAGIC_coro PERL_MAGIC_ext 420#define CORO_MAGIC_type_state PERL_MAGIC_ext
246 421
247static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 422static MGVTBL coro_cv_vtbl = {
423 0, 0, 0, 0,
424 coro_cv_free
425};
426
427#define CORO_MAGIC_NN(sv, type) \
428 (expect_true (SvMAGIC (sv)->mg_type == type) \
429 ? SvMAGIC (sv) \
430 : mg_find (sv, type))
431
432#define CORO_MAGIC(sv, type) \
433 (expect_true (SvMAGIC (sv)) \
434 ? CORO_MAGIC_NN (sv, type) \
435 : 0)
436
437#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
438#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
439
440INLINE struct coro *
441SvSTATE_ (pTHX_ SV *coro)
442{
443 HV *stash;
444 MAGIC *mg;
445
446 if (SvROK (coro))
447 coro = SvRV (coro);
448
449 if (expect_false (SvTYPE (coro) != SVt_PVHV))
450 croak ("Coro::State object required");
451
452 stash = SvSTASH (coro);
453 if (expect_false (stash != coro_stash && stash != coro_state_stash))
454 {
455 /* very slow, but rare, check */
456 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
457 croak ("Coro::State object required");
458 }
459
460 mg = CORO_MAGIC_state (coro);
461 return (struct coro *)mg->mg_ptr;
462}
463
464#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
465
466/* faster than SvSTATE, but expects a coroutine hv */
467#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
468#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
248 469
249/* the next two functions merely cache the padlists */ 470/* the next two functions merely cache the padlists */
250static void 471static void
251get_padlist (CV *cv) 472get_padlist (pTHX_ CV *cv)
252{ 473{
253 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 474 MAGIC *mg = CORO_MAGIC_cv (cv);
475 AV *av;
254 476
255 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 477 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
256 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 478 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
257 else 479 else
258 { 480 {
259#if 0 481#if CORO_PREFER_PERL_FUNCTIONS
260 /* this is probably cleaner, but also slower? */ 482 /* this is probably cleaner? but also slower! */
483 /* in practise, it seems to be less stable */
261 CV *cp = Perl_cv_clone (cv); 484 CV *cp = Perl_cv_clone (aTHX_ cv);
262 CvPADLIST (cv) = CvPADLIST (cp); 485 CvPADLIST (cv) = CvPADLIST (cp);
263 CvPADLIST (cp) = 0; 486 CvPADLIST (cp) = 0;
264 SvREFCNT_dec (cp); 487 SvREFCNT_dec (cp);
265#else 488#else
266 CvPADLIST (cv) = coro_clone_padlist (cv); 489 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
267#endif 490#endif
268 } 491 }
269} 492}
270 493
271static void 494static void
272put_padlist (CV *cv) 495put_padlist (pTHX_ CV *cv)
273{ 496{
274 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 497 MAGIC *mg = CORO_MAGIC_cv (cv);
498 AV *av;
275 499
276 if (!mg) 500 if (expect_false (!mg))
277 { 501 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
278 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
279 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
280 mg->mg_virtual = &vtbl_coro;
281 mg->mg_obj = (SV *)newAV ();
282 }
283 502
284 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 503 av = (AV *)mg->mg_obj;
285}
286 504
287#define SB do { 505 if (expect_false (AvFILLp (av) >= AvMAX (av)))
288#define SE } while (0) 506 av_extend (av, AvMAX (av) + 1);
289 507
290#define LOAD(state) load_state((state)); 508 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
291#define SAVE(state,flags) save_state((state),(flags)); 509}
292 510
293#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 511/** load & save, init *******************************************************/
294 512
295static void 513static void
296load_state(Coro__State c) 514load_perl (pTHX_ Coro__State c)
297{ 515{
298 PL_dowarn = c->dowarn; 516 perl_slots *slot = c->slot;
299 PL_in_eval = c->in_eval; 517 c->slot = 0;
300 518
301 PL_curstackinfo = c->curstackinfo;
302 PL_curstack = c->curstack;
303 PL_mainstack = c->mainstack; 519 PL_mainstack = c->mainstack;
304 PL_stack_sp = c->stack_sp;
305 PL_op = c->op;
306 PL_curpad = c->curpad;
307 PL_comppad = c->comppad;
308 PL_compcv = c->compcv;
309 PL_stack_base = c->stack_base;
310 PL_stack_max = c->stack_max;
311 PL_tmps_stack = c->tmps_stack;
312 PL_tmps_floor = c->tmps_floor;
313 PL_tmps_ix = c->tmps_ix;
314 PL_tmps_max = c->tmps_max;
315 PL_markstack = c->markstack;
316 PL_markstack_ptr = c->markstack_ptr;
317 PL_markstack_max = c->markstack_max;
318 PL_scopestack = c->scopestack;
319 PL_scopestack_ix = c->scopestack_ix;
320 PL_scopestack_max = c->scopestack_max;
321 PL_savestack = c->savestack;
322 PL_savestack_ix = c->savestack_ix;
323 PL_savestack_max = c->savestack_max;
324#if !PERL_VERSION_ATLEAST (5,9,0)
325 PL_retstack = c->retstack;
326 PL_retstack_ix = c->retstack_ix;
327 PL_retstack_max = c->retstack_max;
328#endif
329 PL_curpm = c->curpm;
330 PL_curcop = c->curcop;
331 520
332 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 521 GvSV (PL_defgv) = slot->defsv;
333 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 522 GvAV (PL_defgv) = slot->defav;
334 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 523 GvSV (PL_errgv) = slot->errsv;
524 GvSV (irsgv) = slot->irsgv;
525
526 #define VAR(name,type) PL_ ## name = slot->name;
527 # include "state.h"
528 #undef VAR
335 529
336 { 530 {
337 dSP; 531 dSP;
532
338 CV *cv; 533 CV *cv;
339 534
340 /* now do the ugly restore mess */ 535 /* now do the ugly restore mess */
341 while ((cv = (CV *)POPs)) 536 while (expect_true (cv = (CV *)POPs))
342 { 537 {
343 AV *padlist = (AV *)POPs;
344
345 if (padlist)
346 {
347 put_padlist (cv); /* mark this padlist as available */ 538 put_padlist (aTHX_ cv); /* mark this padlist as available */
348 CvPADLIST(cv) = padlist; 539 CvDEPTH (cv) = PTR2IV (POPs);
349 } 540 CvPADLIST (cv) = (AV *)POPs;
350
351 ++CvDEPTH(cv);
352 } 541 }
353 542
354 PUTBACK; 543 PUTBACK;
355 } 544 }
356}
357 545
546 slf_frame = c->slf_frame;
547 CORO_THROW = c->except;
548}
549
358static void 550static void
359save_state(Coro__State c, int flags) 551save_perl (pTHX_ Coro__State c)
360{ 552{
553 c->except = CORO_THROW;
554 c->slf_frame = slf_frame;
555
361 { 556 {
362 dSP; 557 dSP;
363 I32 cxix = cxstack_ix; 558 I32 cxix = cxstack_ix;
364 PERL_CONTEXT *ccstk = cxstack; 559 PERL_CONTEXT *ccstk = cxstack;
365 PERL_SI *top_si = PL_curstackinfo; 560 PERL_SI *top_si = PL_curstackinfo;
… …
367 /* 562 /*
368 * the worst thing you can imagine happens first - we have to save 563 * the worst thing you can imagine happens first - we have to save
369 * (and reinitialize) all cv's in the whole callchain :( 564 * (and reinitialize) all cv's in the whole callchain :(
370 */ 565 */
371 566
372 PUSHs (Nullsv); 567 XPUSHs (Nullsv);
373 /* this loop was inspired by pp_caller */ 568 /* this loop was inspired by pp_caller */
374 for (;;) 569 for (;;)
375 { 570 {
376 while (cxix >= 0) 571 while (expect_true (cxix >= 0))
377 { 572 {
378 PERL_CONTEXT *cx = &ccstk[cxix--]; 573 PERL_CONTEXT *cx = &ccstk[cxix--];
379 574
380 if (CxTYPE(cx) == CXt_SUB) 575 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
381 { 576 {
382 CV *cv = cx->blk_sub.cv; 577 CV *cv = cx->blk_sub.cv;
578
383 if (CvDEPTH(cv)) 579 if (expect_true (CvDEPTH (cv)))
384 { 580 {
385 EXTEND (SP, CvDEPTH(cv)*2); 581 EXTEND (SP, 3);
386
387 while (--CvDEPTH(cv))
388 {
389 /* this tells the restore code to increment CvDEPTH */
390 PUSHs (Nullsv);
391 PUSHs ((SV *)cv);
392 }
393
394 PUSHs ((SV *)CvPADLIST(cv)); 582 PUSHs ((SV *)CvPADLIST (cv));
583 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
395 PUSHs ((SV *)cv); 584 PUSHs ((SV *)cv);
396 585
586 CvDEPTH (cv) = 0;
397 get_padlist (cv); 587 get_padlist (aTHX_ cv);
398 } 588 }
399 } 589 }
400#ifdef CXt_FORMAT
401 else if (CxTYPE(cx) == CXt_FORMAT)
402 {
403 /* I never used formats, so how should I know how these are implemented? */
404 /* my bold guess is as a simple, plain sub... */
405 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
406 }
407#endif
408 } 590 }
409 591
410 if (top_si->si_type == PERLSI_MAIN) 592 if (expect_true (top_si->si_type == PERLSI_MAIN))
411 break; 593 break;
412 594
413 top_si = top_si->si_prev; 595 top_si = top_si->si_prev;
414 ccstk = top_si->si_cxstack; 596 ccstk = top_si->si_cxstack;
415 cxix = top_si->si_cxix; 597 cxix = top_si->si_cxix;
416 } 598 }
417 599
418 PUTBACK; 600 PUTBACK;
419 } 601 }
420 602
421 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 603 /* allocate some space on the context stack for our purposes */
422 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 604 /* we manually unroll here, as usually 2 slots is enough */
423 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 605 if (SLOT_COUNT >= 1) CXINC;
606 if (SLOT_COUNT >= 2) CXINC;
607 if (SLOT_COUNT >= 3) CXINC;
608 {
609 int i;
610 for (i = 3; i < SLOT_COUNT; ++i)
611 CXINC;
612 }
613 cxstack_ix -= SLOT_COUNT; /* undo allocation */
424 614
425 c->dowarn = PL_dowarn;
426 c->in_eval = PL_in_eval;
427
428 c->curstackinfo = PL_curstackinfo;
429 c->curstack = PL_curstack;
430 c->mainstack = PL_mainstack; 615 c->mainstack = PL_mainstack;
431 c->stack_sp = PL_stack_sp; 616
432 c->op = PL_op; 617 {
433 c->curpad = PL_curpad; 618 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
434 c->comppad = PL_comppad; 619
435 c->compcv = PL_compcv; 620 slot->defav = GvAV (PL_defgv);
436 c->stack_base = PL_stack_base; 621 slot->defsv = DEFSV;
437 c->stack_max = PL_stack_max; 622 slot->errsv = ERRSV;
438 c->tmps_stack = PL_tmps_stack; 623 slot->irsgv = GvSV (irsgv);
439 c->tmps_floor = PL_tmps_floor; 624
440 c->tmps_ix = PL_tmps_ix; 625 #define VAR(name,type) slot->name = PL_ ## name;
441 c->tmps_max = PL_tmps_max; 626 # include "state.h"
442 c->markstack = PL_markstack; 627 #undef VAR
443 c->markstack_ptr = PL_markstack_ptr; 628 }
444 c->markstack_max = PL_markstack_max;
445 c->scopestack = PL_scopestack;
446 c->scopestack_ix = PL_scopestack_ix;
447 c->scopestack_max = PL_scopestack_max;
448 c->savestack = PL_savestack;
449 c->savestack_ix = PL_savestack_ix;
450 c->savestack_max = PL_savestack_max;
451#if !PERL_VERSION_ATLEAST (5,9,0)
452 c->retstack = PL_retstack;
453 c->retstack_ix = PL_retstack_ix;
454 c->retstack_max = PL_retstack_max;
455#endif
456 c->curpm = PL_curpm;
457 c->curcop = PL_curcop;
458} 629}
459 630
460/* 631/*
461 * allocate various perl stacks. This is an exact copy 632 * allocate various perl stacks. This is almost an exact copy
462 * of perl.c:init_stacks, except that it uses less memory 633 * of perl.c:init_stacks, except that it uses less memory
463 * on the (sometimes correct) assumption that coroutines do 634 * on the (sometimes correct) assumption that coroutines do
464 * not usually need a lot of stackspace. 635 * not usually need a lot of stackspace.
465 */ 636 */
637#if CORO_PREFER_PERL_FUNCTIONS
638# define coro_init_stacks(thx) init_stacks ()
639#else
466static void 640static void
467coro_init_stacks () 641coro_init_stacks (pTHX)
468{ 642{
469 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 643 PL_curstackinfo = new_stackinfo(32, 8);
470 PL_curstackinfo->si_type = PERLSI_MAIN; 644 PL_curstackinfo->si_type = PERLSI_MAIN;
471 PL_curstack = PL_curstackinfo->si_stack; 645 PL_curstack = PL_curstackinfo->si_stack;
472 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 646 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473 647
474 PL_stack_base = AvARRAY(PL_curstack); 648 PL_stack_base = AvARRAY(PL_curstack);
475 PL_stack_sp = PL_stack_base; 649 PL_stack_sp = PL_stack_base;
476 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 650 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477 651
478 New(50,PL_tmps_stack,96,SV*); 652 New(50,PL_tmps_stack,32,SV*);
479 PL_tmps_floor = -1; 653 PL_tmps_floor = -1;
480 PL_tmps_ix = -1; 654 PL_tmps_ix = -1;
481 PL_tmps_max = 96; 655 PL_tmps_max = 32;
482 656
483 New(54,PL_markstack,16,I32); 657 New(54,PL_markstack,16,I32);
484 PL_markstack_ptr = PL_markstack; 658 PL_markstack_ptr = PL_markstack;
485 PL_markstack_max = PL_markstack + 16; 659 PL_markstack_max = PL_markstack + 16;
486 660
487#ifdef SET_MARK_OFFSET 661#ifdef SET_MARK_OFFSET
488 SET_MARK_OFFSET; 662 SET_MARK_OFFSET;
489#endif 663#endif
490 664
491 New(54,PL_scopestack,16,I32); 665 New(54,PL_scopestack,8,I32);
492 PL_scopestack_ix = 0; 666 PL_scopestack_ix = 0;
493 PL_scopestack_max = 16; 667 PL_scopestack_max = 8;
494 668
495 New(54,PL_savestack,96,ANY); 669 New(54,PL_savestack,24,ANY);
496 PL_savestack_ix = 0; 670 PL_savestack_ix = 0;
497 PL_savestack_max = 96; 671 PL_savestack_max = 24;
498 672
499#if !PERL_VERSION_ATLEAST (5,9,0) 673#if !PERL_VERSION_ATLEAST (5,10,0)
500 New(54,PL_retstack,8,OP*); 674 New(54,PL_retstack,4,OP*);
501 PL_retstack_ix = 0; 675 PL_retstack_ix = 0;
502 PL_retstack_max = 8; 676 PL_retstack_max = 4;
503#endif 677#endif
504} 678}
679#endif
505 680
506/* 681/*
507 * destroy the stacks, the callchain etc... 682 * destroy the stacks, the callchain etc...
508 */ 683 */
509static void 684static void
510coro_destroy_stacks () 685coro_destruct_stacks (pTHX)
511{ 686{
512 if (!IN_DESTRUCT)
513 {
514 /* is this ugly, I ask? */
515 LEAVE_SCOPE (0);
516
517 /* sure it is, but more important: is it correct?? :/ */
518 FREETMPS;
519
520 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
521 }
522
523 while (PL_curstackinfo->si_next) 687 while (PL_curstackinfo->si_next)
524 PL_curstackinfo = PL_curstackinfo->si_next; 688 PL_curstackinfo = PL_curstackinfo->si_next;
525 689
526 while (PL_curstackinfo) 690 while (PL_curstackinfo)
527 { 691 {
528 PERL_SI *p = PL_curstackinfo->si_prev; 692 PERL_SI *p = PL_curstackinfo->si_prev;
529 693
530 { /*D*//*remove*/
531 dSP;
532 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
533 PUTBACK; /* possibly superfluous */
534 }
535
536 if (!IN_DESTRUCT) 694 if (!IN_DESTRUCT)
537 {
538 dounwind (-1);/*D*//*remove*/
539 SvREFCNT_dec (PL_curstackinfo->si_stack); 695 SvREFCNT_dec (PL_curstackinfo->si_stack);
540 }
541 696
542 Safefree (PL_curstackinfo->si_cxstack); 697 Safefree (PL_curstackinfo->si_cxstack);
543 Safefree (PL_curstackinfo); 698 Safefree (PL_curstackinfo);
544 PL_curstackinfo = p; 699 PL_curstackinfo = p;
545 } 700 }
546 701
547 Safefree (PL_tmps_stack); 702 Safefree (PL_tmps_stack);
548 Safefree (PL_markstack); 703 Safefree (PL_markstack);
549 Safefree (PL_scopestack); 704 Safefree (PL_scopestack);
550 Safefree (PL_savestack); 705 Safefree (PL_savestack);
551#if !PERL_VERSION_ATLEAST (5,9,0) 706#if !PERL_VERSION_ATLEAST (5,10,0)
552 Safefree (PL_retstack); 707 Safefree (PL_retstack);
553#endif 708#endif
554} 709}
555 710
711#define CORO_RSS \
712 rss += sizeof (SYM (curstackinfo)); \
713 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
714 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
715 rss += SYM (tmps_max) * sizeof (SV *); \
716 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
717 rss += SYM (scopestack_max) * sizeof (I32); \
718 rss += SYM (savestack_max) * sizeof (ANY);
719
720static size_t
721coro_rss (pTHX_ struct coro *coro)
722{
723 size_t rss = sizeof (*coro);
724
725 if (coro->mainstack)
726 {
727 if (coro->flags & CF_RUNNING)
728 {
729 #define SYM(sym) PL_ ## sym
730 CORO_RSS;
731 #undef SYM
732 }
733 else
734 {
735 #define SYM(sym) coro->slot->sym
736 CORO_RSS;
737 #undef SYM
738 }
739 }
740
741 return rss;
742}
743
744/** coroutine stack handling ************************************************/
745
746static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
747static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
748static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
749
750/* apparently < 5.8.8 */
751#ifndef MgPV_nolen_const
752#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
753 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
754 (const char*)(mg)->mg_ptr)
755#endif
756
757/*
758 * This overrides the default magic get method of %SIG elements.
759 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
760 * and instead of tryign to save and restore the hash elements, we just provide
761 * readback here.
762 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
763 * not expecting this to actually change the hook. This is a potential problem
764 * when a schedule happens then, but we ignore this.
765 */
556static void 766static int
557setup_coro (struct coro *coro) 767coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
768{
769 const char *s = MgPV_nolen_const (mg);
770
771 if (*s == '_')
772 {
773 SV **svp = 0;
774
775 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
776 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
777
778 if (svp)
779 {
780 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
781 return 0;
782 }
783 }
784
785 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
786}
787
788static int
789coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
790{
791 const char *s = MgPV_nolen_const (mg);
792
793 if (*s == '_')
794 {
795 SV **svp = 0;
796
797 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
798 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
799
800 if (svp)
801 {
802 SV *old = *svp;
803 *svp = 0;
804 SvREFCNT_dec (old);
805 return 0;
806 }
807 }
808
809 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
810}
811
812static int
813coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
814{
815 const char *s = MgPV_nolen_const (mg);
816
817 if (*s == '_')
818 {
819 SV **svp = 0;
820
821 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
822 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
823
824 if (svp)
825 {
826 SV *old = *svp;
827 *svp = newSVsv (sv);
828 SvREFCNT_dec (old);
829 return 0;
830 }
831 }
832
833 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
834}
835
836static void
837prepare_nop (pTHX_ struct coro_transfer_args *ta)
838{
839 /* kind of mega-hacky, but works */
840 ta->next = ta->prev = (struct coro *)ta;
841}
842
843static int
844slf_check_nop (pTHX_ struct CoroSLF *frame)
845{
846 return 0;
847}
848
849static int
850slf_check_repeat (pTHX_ struct CoroSLF *frame)
851{
852 return 1;
853}
854
855static UNOP coro_setup_op;
856
857static void NOINLINE /* noinline to keep it out of the transfer fast path */
858coro_setup (pTHX_ struct coro *coro)
558{ 859{
559 /* 860 /*
560 * emulate part of the perl startup here. 861 * emulate part of the perl startup here.
561 */ 862 */
562
563 coro_init_stacks (); 863 coro_init_stacks (aTHX);
564 864
865 PL_runops = RUNOPS_DEFAULT;
866 PL_curcop = &PL_compiling;
867 PL_in_eval = EVAL_NULL;
565 PL_curcop = 0; 868 PL_comppad = 0;
566 PL_in_eval = 0;
567 PL_curpm = 0; 869 PL_curpm = 0;
870 PL_curpad = 0;
871 PL_localizing = 0;
872 PL_dirty = 0;
873 PL_restartop = 0;
874#if PERL_VERSION_ATLEAST (5,10,0)
875 PL_parser = 0;
876#endif
877
878 /* recreate the die/warn hooks */
879 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
880 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
881
882 GvSV (PL_defgv) = newSV (0);
883 GvAV (PL_defgv) = coro->args; coro->args = 0;
884 GvSV (PL_errgv) = newSV (0);
885 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
886 PL_rs = newSVsv (GvSV (irsgv));
887 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
568 888
569 { 889 {
570 dSP; 890 dSP;
571 LOGOP myop; 891 UNOP myop;
572 892
573 /* I have no idea why this is needed, but it is */ 893 Zero (&myop, 1, UNOP);
894 myop.op_next = Nullop;
895 myop.op_type = OP_ENTERSUB;
896 myop.op_flags = OPf_WANT_VOID;
897
574 PUSHMARK (SP); 898 PUSHMARK (SP);
575 899 PUSHs ((SV *)coro->startcv);
576 SvREFCNT_dec (GvAV (PL_defgv)); 900 PUTBACK;
577 GvAV (PL_defgv) = coro->args; coro->args = 0;
578
579 Zero (&myop, 1, LOGOP);
580 myop.op_next = Nullop;
581 myop.op_flags = OPf_WANT_VOID;
582
583 PL_op = (OP *)&myop; 901 PL_op = (OP *)&myop;
584
585 PUSHMARK (SP);
586 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
587 PUTBACK;
588 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 902 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
589 SPAGAIN;
590
591 ENTER; /* necessary e.g. for dounwind */
592 } 903 }
593}
594 904
905 /* this newly created coroutine might be run on an existing cctx which most
906 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
907 */
908 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
909 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
910
911 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
912 coro_setup_op.op_next = PL_op;
913 coro_setup_op.op_type = OP_ENTERSUB;
914 coro_setup_op.op_ppaddr = pp_slf;
915 /* no flags etc. required, as an init function won't be called */
916
917 PL_op = (OP *)&coro_setup_op;
918
919 /* copy throw, in case it was set before coro_setup */
920 CORO_THROW = coro->except;
921}
922
595static void 923static void
924coro_destruct (pTHX_ struct coro *coro)
925{
926 if (!IN_DESTRUCT)
927 {
928 /* restore all saved variables and stuff */
929 LEAVE_SCOPE (0);
930 assert (PL_tmps_floor == -1);
931
932 /* free all temporaries */
933 FREETMPS;
934 assert (PL_tmps_ix == -1);
935
936 /* unwind all extra stacks */
937 POPSTACK_TO (PL_mainstack);
938
939 /* unwind main stack */
940 dounwind (-1);
941 }
942
943 SvREFCNT_dec (GvSV (PL_defgv));
944 SvREFCNT_dec (GvAV (PL_defgv));
945 SvREFCNT_dec (GvSV (PL_errgv));
946 SvREFCNT_dec (PL_defoutgv);
947 SvREFCNT_dec (PL_rs);
948 SvREFCNT_dec (GvSV (irsgv));
949
950 SvREFCNT_dec (PL_diehook);
951 SvREFCNT_dec (PL_warnhook);
952
953 SvREFCNT_dec (coro->saved_deffh);
954 SvREFCNT_dec (coro->rouse_cb);
955 SvREFCNT_dec (coro->invoke_cb);
956 SvREFCNT_dec (coro->invoke_av);
957
958 coro_destruct_stacks (aTHX);
959}
960
961INLINE void
596free_coro_mortal () 962free_coro_mortal (pTHX)
597{ 963{
598 if (coro_mortal) 964 if (expect_true (coro_mortal))
599 { 965 {
600 SvREFCNT_dec (coro_mortal); 966 SvREFCNT_dec (coro_mortal);
601 coro_mortal = 0; 967 coro_mortal = 0;
602 } 968 }
603} 969}
604 970
971static int
972runops_trace (pTHX)
973{
974 COP *oldcop = 0;
975 int oldcxix = -2;
976 struct coro *coro = SvSTATE_current; /* trace cctx is tied to specific coro */
977 coro_cctx *cctx = coro->cctx;
978
979 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
980 {
981 PERL_ASYNC_CHECK ();
982
983 if (cctx->flags & CC_TRACE_ALL)
984 {
985 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
986 {
987 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
988 SV **bot, **top;
989 AV *av = newAV (); /* return values */
990 SV **cb;
991 dSP;
992
993 GV *gv = CvGV (cx->blk_sub.cv);
994 SV *fullname = sv_2mortal (newSV (0));
995 if (isGV (gv))
996 gv_efullname3 (fullname, gv, 0);
997
998 bot = PL_stack_base + cx->blk_oldsp + 1;
999 top = cx->blk_gimme == G_ARRAY ? SP + 1
1000 : cx->blk_gimme == G_SCALAR ? bot + 1
1001 : bot;
1002
1003 av_extend (av, top - bot);
1004 while (bot < top)
1005 av_push (av, SvREFCNT_inc_NN (*bot++));
1006
1007 PL_runops = RUNOPS_DEFAULT;
1008 ENTER;
1009 SAVETMPS;
1010 EXTEND (SP, 3);
1011 PUSHMARK (SP);
1012 PUSHs (&PL_sv_no);
1013 PUSHs (fullname);
1014 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1015 PUTBACK;
1016 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1017 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1018 SPAGAIN;
1019 FREETMPS;
1020 LEAVE;
1021 PL_runops = runops_trace;
1022 }
1023
1024 if (oldcop != PL_curcop)
1025 {
1026 oldcop = PL_curcop;
1027
1028 if (PL_curcop != &PL_compiling)
1029 {
1030 SV **cb;
1031
1032 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
1033 {
1034 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1035
1036 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1037 {
1038 dSP;
1039 GV *gv = CvGV (cx->blk_sub.cv);
1040 SV *fullname = sv_2mortal (newSV (0));
1041
1042 if (isGV (gv))
1043 gv_efullname3 (fullname, gv, 0);
1044
1045 PL_runops = RUNOPS_DEFAULT;
1046 ENTER;
1047 SAVETMPS;
1048 EXTEND (SP, 3);
1049 PUSHMARK (SP);
1050 PUSHs (&PL_sv_yes);
1051 PUSHs (fullname);
1052 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1053 PUTBACK;
1054 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1055 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1056 SPAGAIN;
1057 FREETMPS;
1058 LEAVE;
1059 PL_runops = runops_trace;
1060 }
1061
1062 oldcxix = cxstack_ix;
1063 }
1064
1065 if (cctx->flags & CC_TRACE_LINE)
1066 {
1067 dSP;
1068
1069 PL_runops = RUNOPS_DEFAULT;
1070 ENTER;
1071 SAVETMPS;
1072 EXTEND (SP, 3);
1073 PL_runops = RUNOPS_DEFAULT;
1074 PUSHMARK (SP);
1075 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1076 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1077 PUTBACK;
1078 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1079 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1080 SPAGAIN;
1081 FREETMPS;
1082 LEAVE;
1083 PL_runops = runops_trace;
1084 }
1085 }
1086 }
1087 }
1088 }
1089
1090 TAINT_NOT;
1091 return 0;
1092}
1093
1094static struct CoroSLF cctx_ssl_frame;
1095
1096static void
1097slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1098{
1099 ta->prev = 0;
1100}
1101
1102static int
1103slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1104{
1105 *frame = cctx_ssl_frame;
1106
1107 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1108}
1109
1110/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
605static void NOINLINE 1111static void NOINLINE
606prepare_cctx (coro_cctx *cctx) 1112cctx_prepare (pTHX)
607{ 1113{
608 dSP;
609 LOGOP myop;
610
611 Zero (&myop, 1, LOGOP);
612 myop.op_next = PL_op;
613 myop.op_flags = OPf_WANT_VOID;
614
615 sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
616
617 PUSHMARK (SP);
618 XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
619 PUTBACK;
620 PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
621 SPAGAIN;
622}
623
624static void
625coro_run (void *arg)
626{
627 /* coro_run is the alternative epilogue of transfer() */
628 UNLOCK;
629
630 /*
631 * this is a _very_ stripped down perl interpreter ;)
632 */
633 PL_top_env = &PL_start_env; 1114 PL_top_env = &PL_start_env;
634 1115
1116 if (cctx_current->flags & CC_TRACE)
1117 PL_runops = runops_trace;
1118
1119 /* we already must be executing an SLF op, there is no other valid way
1120 * that can lead to creation of a new cctx */
1121 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1122 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1123
1124 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1125 cctx_ssl_frame = slf_frame;
1126
1127 slf_frame.prepare = slf_prepare_set_stacklevel;
1128 slf_frame.check = slf_check_set_stacklevel;
1129}
1130
1131/* the tail of transfer: execute stuff we can only do after a transfer */
1132INLINE void
1133transfer_tail (pTHX)
1134{
1135 free_coro_mortal (aTHX);
1136}
1137
1138/*
1139 * this is a _very_ stripped down perl interpreter ;)
1140 */
1141static void
1142cctx_run (void *arg)
1143{
1144#ifdef USE_ITHREADS
1145# if CORO_PTHREAD
1146 PERL_SET_CONTEXT (coro_thx);
1147# endif
1148#endif
1149 {
1150 dTHX;
1151
1152 /* normally we would need to skip the entersub here */
1153 /* not doing so will re-execute it, which is exactly what we want */
1154 /* PL_nop = PL_nop->op_next */
1155
635 /* inject call to cctx_init */ 1156 /* inject a fake subroutine call to cctx_init */
636 prepare_cctx ((coro_cctx *)arg); 1157 cctx_prepare (aTHX);
637 1158
1159 /* cctx_run is the alternative tail of transfer() */
1160 transfer_tail (aTHX);
1161
638 /* somebody will hit me for both perl_run and PL_restartop */ 1162 /* somebody or something will hit me for both perl_run and PL_restartop */
1163 PL_restartop = PL_op;
639 perl_run (PL_curinterp); 1164 perl_run (PL_curinterp);
1165 /*
1166 * Unfortunately, there is no way to get at the return values of the
1167 * coro body here, as perl_run destroys these
1168 */
640 1169
641 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr); 1170 /*
642 abort (); 1171 * If perl-run returns we assume exit() was being called or the coro
1172 * fell off the end, which seems to be the only valid (non-bug)
1173 * reason for perl_run to return. We try to exit by jumping to the
1174 * bootstrap-time "top" top_env, as we cannot restore the "main"
1175 * coroutine as Coro has no such concept
1176 */
1177 PL_top_env = main_top_env;
1178 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1179 }
643} 1180}
644 1181
645static coro_cctx * 1182static coro_cctx *
646cctx_new () 1183cctx_new ()
647{ 1184{
648 coro_cctx *cctx; 1185 coro_cctx *cctx;
649 1186
650 ++cctx_count; 1187 ++cctx_count;
651
652 New (0, cctx, 1, coro_cctx); 1188 New (0, cctx, 1, coro_cctx);
653 1189
1190 cctx->gen = cctx_gen;
1191 cctx->flags = 0;
1192 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1193
1194 return cctx;
1195}
1196
1197/* create a new cctx only suitable as source */
1198static coro_cctx *
1199cctx_new_empty ()
1200{
1201 coro_cctx *cctx = cctx_new ();
1202
1203 cctx->sptr = 0;
1204 coro_create (&cctx->cctx, 0, 0, 0, 0);
1205
1206 return cctx;
1207}
1208
1209/* create a new cctx suitable as destination/running a perl interpreter */
1210static coro_cctx *
1211cctx_new_run ()
1212{
1213 coro_cctx *cctx = cctx_new ();
1214 void *stack_start;
1215 size_t stack_size;
1216
654#if HAVE_MMAP 1217#if HAVE_MMAP
655
656 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1218 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
657 /* mmap suppsedly does allocate-on-write for us */ 1219 /* mmap supposedly does allocate-on-write for us */
658 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1220 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
659 1221
660 if (cctx->sptr == (void *)-1) 1222 if (cctx->sptr != (void *)-1)
1223 {
1224 #if CORO_STACKGUARD
1225 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1226 #endif
1227 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1228 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1229 cctx->flags |= CC_MAPPED;
661 { 1230 }
1231 else
1232#endif
1233 {
1234 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1235 New (0, cctx->sptr, cctx_stacksize, long);
1236
1237 if (!cctx->sptr)
1238 {
662 perror ("FATAL: unable to mmap stack for coroutine"); 1239 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
663 _exit (EXIT_FAILURE); 1240 _exit (EXIT_FAILURE);
664 } 1241 }
665 1242
666# if STACKGUARD 1243 stack_start = cctx->sptr;
667 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1244 stack_size = cctx->ssize;
668# endif
669
670#else
671
672 cctx->ssize = STACKSIZE * (long)sizeof (long);
673 New (0, cctx->sptr, STACKSIZE, long);
674
675 if (!cctx->sptr)
676 { 1245 }
677 perror ("FATAL: unable to malloc stack for coroutine");
678 _exit (EXIT_FAILURE);
679 }
680 1246
1247 #if CORO_USE_VALGRIND
1248 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
681#endif 1249 #endif
682 1250
683#if USE_VALGRIND 1251 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
684 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
685 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
686 cctx->ssize + (char *)cctx->sptr
687 );
688#endif
689
690 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
691 1252
692 return cctx; 1253 return cctx;
693} 1254}
694 1255
695static void 1256static void
696cctx_free (coro_cctx *cctx) 1257cctx_destroy (coro_cctx *cctx)
697{ 1258{
698 if (!cctx) 1259 if (!cctx)
699 return; 1260 return;
700 1261
1262 assert (cctx != cctx_current);//D temporary
1263
701 --cctx_count; 1264 --cctx_count;
1265 coro_destroy (&cctx->cctx);
702 1266
703#if USE_VALGRIND 1267 /* coro_transfer creates new, empty cctx's */
1268 if (cctx->sptr)
1269 {
1270 #if CORO_USE_VALGRIND
704 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id); 1271 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
705#endif 1272 #endif
706 1273
707#if HAVE_MMAP 1274#if HAVE_MMAP
1275 if (cctx->flags & CC_MAPPED)
708 munmap (cctx->sptr, cctx->ssize); 1276 munmap (cctx->sptr, cctx->ssize);
709#else 1277 else
1278#endif
710 Safefree (cctx->sptr); 1279 Safefree (cctx->sptr);
711#endif 1280 }
712 1281
713 Safefree (cctx); 1282 Safefree (cctx);
714} 1283}
715 1284
1285/* wether this cctx should be destructed */
1286#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1287
716static coro_cctx * 1288static coro_cctx *
717cctx_get () 1289cctx_get (pTHX)
718{ 1290{
719 coro_cctx *cctx; 1291 while (expect_true (cctx_first))
720
721 if (cctx_first)
722 { 1292 {
1293 coro_cctx *cctx = cctx_first;
1294 cctx_first = cctx->next;
723 --cctx_idle; 1295 --cctx_idle;
724 cctx = cctx_first; 1296
725 cctx_first = cctx->next; 1297 if (expect_true (!CCTX_EXPIRED (cctx)))
726 } 1298 return cctx;
727 else 1299
728 { 1300 cctx_destroy (cctx);
729 cctx = cctx_new ();
730 PL_op = PL_op->op_next;
731 } 1301 }
732 1302
733 return cctx; 1303 return cctx_new_run ();
734} 1304}
735 1305
736static void 1306static void
737cctx_put (coro_cctx *cctx) 1307cctx_put (coro_cctx *cctx)
738{ 1308{
1309 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1310
1311 /* free another cctx if overlimit */
1312 if (expect_false (cctx_idle >= cctx_max_idle))
1313 {
1314 coro_cctx *first = cctx_first;
1315 cctx_first = first->next;
1316 --cctx_idle;
1317
1318 cctx_destroy (first);
1319 }
1320
739 ++cctx_idle; 1321 ++cctx_idle;
740 cctx->next = cctx_first; 1322 cctx->next = cctx_first;
741 cctx_first = cctx; 1323 cctx_first = cctx;
742} 1324}
743 1325
744/* never call directly, always through the coro_state_transfer global variable */ 1326/** coroutine switching *****************************************************/
745static void NOINLINE 1327
1328static void
1329transfer_check (pTHX_ struct coro *prev, struct coro *next)
1330{
1331 /* TODO: throwing up here is considered harmful */
1332
1333 if (expect_true (prev != next))
1334 {
1335 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1336 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states,");
1337
1338 if (expect_false (next->flags & CF_RUNNING))
1339 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states,");
1340
1341 if (expect_false (next->flags & CF_DESTROYED))
1342 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states,");
1343
1344#if !PERL_VERSION_ATLEAST (5,10,0)
1345 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1346 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1347#endif
1348 }
1349}
1350
1351/* always use the TRANSFER macro */
1352static void NOINLINE /* noinline so we have a fixed stackframe */
746transfer (struct coro *prev, struct coro *next, int flags) 1353transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
747{ 1354{
748 dSTACKLEVEL; 1355 dSTACKLEVEL;
749 1356
750 /* sometimes transfer is only called to set idle_sp */ 1357 /* sometimes transfer is only called to set idle_sp */
751 if (flags == TRANSFER_SET_STACKLEVEL) 1358 if (expect_false (!prev))
1359 {
752 ((coro_cctx *)prev)->idle_sp = STACKLEVEL; 1360 cctx_current->idle_sp = STACKLEVEL;
753 else if (prev != next) 1361 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
754 { 1362 }
1363 else if (expect_true (prev != next))
1364 {
755 coro_cctx *prev__cctx; 1365 coro_cctx *cctx_prev;
756 1366
757 LOCK; 1367 if (expect_false (prev->flags & CF_NEW))
758
759 if (next->mainstack)
760 { 1368 {
761 /* coroutine already started */ 1369 /* create a new empty/source context */
762 SAVE (prev, flags); 1370 prev->flags &= ~CF_NEW;
763 LOAD (next); 1371 prev->flags |= CF_RUNNING;
1372 }
1373
1374 prev->flags &= ~CF_RUNNING;
1375 next->flags |= CF_RUNNING;
1376
1377 /* first get rid of the old state */
1378 save_perl (aTHX_ prev);
1379
1380 if (expect_false (next->flags & CF_NEW))
1381 {
1382 /* need to start coroutine */
1383 next->flags &= ~CF_NEW;
1384 /* setup coroutine call */
1385 coro_setup (aTHX_ next);
764 } 1386 }
765 else 1387 else
1388 load_perl (aTHX_ next);
1389
1390 /* possibly untie and reuse the cctx */
1391 if (expect_true (
1392 cctx_current->idle_sp == STACKLEVEL
1393 && !(cctx_current->flags & CC_TRACE)
1394 && !force_cctx
1395 ))
766 { 1396 {
767 /* need to start coroutine */ 1397 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
768 /* first get rid of the old state */ 1398 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
769 SAVE (prev, -1); 1399
770 /* setup coroutine call */ 1400 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
771 setup_coro (next); 1401 /* without this the next cctx_get might destroy the prev__cctx while still in use */
772 /* need a stack */ 1402 if (expect_false (CCTX_EXPIRED (cctx_current)))
773 next->cctx = 0; 1403 if (!next->cctx)
1404 next->cctx = cctx_get (aTHX);
1405
1406 cctx_put (cctx_current);
1407 assert (!prev->cctx);//D temporary
774 } 1408 }
1409 else
1410 prev->cctx = cctx_current;
775 1411
776 if (!prev->cctx) 1412 ++next->usecount;
777 /* create a new empty context */
778 Newz (0, prev->cctx, 1, coro_cctx);
779 1413
780 prev__cctx = prev->cctx; 1414 cctx_prev = cctx_current;
1415 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
781 1416
782 /* possibly "free" the cctx */ 1417 next->cctx = 0;
783 if (prev__cctx->idle_sp == STACKLEVEL) 1418
1419 if (expect_false (cctx_prev != cctx_current))
784 { 1420 {
785 cctx_put (prev__cctx); 1421 cctx_prev->top_env = PL_top_env;
786 prev->cctx = 0; 1422 PL_top_env = cctx_current->top_env;
1423 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
787 } 1424 }
788 1425
789 if (!next->cctx) 1426 transfer_tail (aTHX);
790 next->cctx = cctx_get ();
791
792 if (prev__cctx != next->cctx)
793 {
794 prev__cctx->top_env = PL_top_env;
795 PL_top_env = next->cctx->top_env;
796 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
797 }
798
799 free_coro_mortal ();
800
801 UNLOCK;
802 } 1427 }
803} 1428}
804 1429
805struct transfer_args 1430#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
806{
807 struct coro *prev, *next;
808 int flags;
809};
810
811#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags) 1431#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
812 1432
1433/** high level stuff ********************************************************/
1434
813static void 1435static int
814coro_state_destroy (struct coro *coro) 1436coro_state_destroy (pTHX_ struct coro *coro)
815{ 1437{
816 if (coro->refcnt--) 1438 if (coro->flags & CF_DESTROYED)
817 return; 1439 return 0;
1440
1441 if (coro->on_destroy)
1442 coro->on_destroy (aTHX_ coro);
1443
1444 coro->flags |= CF_DESTROYED;
1445
1446 if (coro->flags & CF_READY)
1447 {
1448 /* reduce nready, as destroying a ready coro effectively unreadies it */
1449 /* alternative: look through all ready queues and remove the coro */
1450 --coro_nready;
1451 }
1452 else
1453 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
818 1454
819 if (coro->mainstack && coro->mainstack != main_mainstack) 1455 if (coro->mainstack && coro->mainstack != main_mainstack)
820 { 1456 {
821 struct coro temp; 1457 struct coro temp;
822 1458
823 SAVE ((&temp), TRANSFER_SAVE_ALL); 1459 assert (("FATAL: tried to destroy currently running coroutine (please report)", !(coro->flags & CF_RUNNING)));
824 LOAD (coro);
825 1460
826 coro_destroy_stacks (); 1461 save_perl (aTHX_ &temp);
1462 load_perl (aTHX_ coro);
827 1463
828 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1464 coro_destruct (aTHX_ coro);
829 1465
1466 load_perl (aTHX_ &temp);
1467
830 coro->mainstack = 0; 1468 coro->slot = 0;
831 } 1469 }
832 1470
833 cctx_free (coro->cctx); 1471 cctx_destroy (coro->cctx);
1472 SvREFCNT_dec (coro->startcv);
834 SvREFCNT_dec (coro->args); 1473 SvREFCNT_dec (coro->args);
835 Safefree (coro); 1474 SvREFCNT_dec (CORO_THROW);
1475
1476 if (coro->next) coro->next->prev = coro->prev;
1477 if (coro->prev) coro->prev->next = coro->next;
1478 if (coro == coro_first) coro_first = coro->next;
1479
1480 return 1;
836} 1481}
837 1482
838static int 1483static int
839coro_state_clear (pTHX_ SV *sv, MAGIC *mg) 1484coro_state_free (pTHX_ SV *sv, MAGIC *mg)
840{ 1485{
841 struct coro *coro = (struct coro *)mg->mg_ptr; 1486 struct coro *coro = (struct coro *)mg->mg_ptr;
842 mg->mg_ptr = 0; 1487 mg->mg_ptr = 0;
843 1488
1489 coro->hv = 0;
1490
1491 if (--coro->refcnt < 0)
1492 {
844 coro_state_destroy (coro); 1493 coro_state_destroy (aTHX_ coro);
1494 Safefree (coro);
1495 }
845 1496
846 return 0; 1497 return 0;
847} 1498}
848 1499
849static int 1500static int
… …
856 return 0; 1507 return 0;
857} 1508}
858 1509
859static MGVTBL coro_state_vtbl = { 1510static MGVTBL coro_state_vtbl = {
860 0, 0, 0, 0, 1511 0, 0, 0, 0,
861 coro_state_clear, 1512 coro_state_free,
862 0, 1513 0,
863#ifdef MGf_DUP 1514#ifdef MGf_DUP
864 coro_state_dup, 1515 coro_state_dup,
865#else 1516#else
866# define MGf_DUP 0 1517# define MGf_DUP 0
867#endif 1518#endif
868}; 1519};
869 1520
870static struct coro *
871SvSTATE (SV *coro)
872{
873 HV *stash;
874 MAGIC *mg;
875
876 if (SvROK (coro))
877 coro = SvRV (coro);
878
879 stash = SvSTASH (coro);
880 if (stash != coro_stash && stash != coro_state_stash)
881 {
882 /* very slow, but rare, check */
883 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
884 croak ("Coro::State object required");
885 }
886
887 mg = SvMAGIC (coro);
888 assert (mg->mg_type == PERL_MAGIC_ext);
889 return (struct coro *)mg->mg_ptr;
890}
891
892static void 1521static void
893prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags) 1522prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
894{ 1523{
895 ta->prev = SvSTATE (prev); 1524 ta->prev = SvSTATE (prev_sv);
896 ta->next = SvSTATE (next); 1525 ta->next = SvSTATE (next_sv);
897 ta->flags = flags; 1526 TRANSFER_CHECK (*ta);
898} 1527}
899 1528
900static void 1529static void
901api_transfer (SV *prev, SV *next, int flags) 1530api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
902{ 1531{
903 dTHX;
904 struct transfer_args ta; 1532 struct coro_transfer_args ta;
905 1533
906 prepare_transfer (&ta, prev, next, flags); 1534 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
907 TRANSFER (ta); 1535 TRANSFER (ta, 1);
1536}
1537
1538/*****************************************************************************/
1539/* gensub: simple closure generation utility */
1540
1541#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1542
1543/* create a closure from XS, returns a code reference */
1544/* the arg can be accessed via GENSUB_ARG from the callback */
1545/* the callback must use dXSARGS/XSRETURN */
1546static SV *
1547gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1548{
1549 CV *cv = (CV *)newSV (0);
1550
1551 sv_upgrade ((SV *)cv, SVt_PVCV);
1552
1553 CvANON_on (cv);
1554 CvISXSUB_on (cv);
1555 CvXSUB (cv) = xsub;
1556 GENSUB_ARG = arg;
1557
1558 return newRV_noinc ((SV *)cv);
908} 1559}
909 1560
910/** Coro ********************************************************************/ 1561/** Coro ********************************************************************/
911 1562
912#define PRIO_MAX 3 1563INLINE void
913#define PRIO_HIGH 1 1564coro_enq (pTHX_ struct coro *coro)
914#define PRIO_NORMAL 0 1565{
915#define PRIO_LOW -1 1566 av_push (coro_ready [coro->prio - PRIO_MIN], SvREFCNT_inc_NN (coro->hv));
916#define PRIO_IDLE -3 1567}
917#define PRIO_MIN -4
918 1568
919/* for Coro.pm */ 1569INLINE SV *
920static GV *coro_current, *coro_idle; 1570coro_deq (pTHX)
921static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
922static int coro_nready;
923
924static void
925coro_enq (SV *sv)
926{ 1571{
927 int prio; 1572 int prio;
928 1573
929 if (SvTYPE (sv) != SVt_PVHV)
930 croak ("Coro::ready tried to enqueue something that is not a coroutine");
931
932 prio = SvSTATE (sv)->prio;
933
934 av_push (coro_ready [prio - PRIO_MIN], sv);
935 coro_nready++;
936}
937
938static SV *
939coro_deq (int min_prio)
940{
941 int prio = PRIO_MAX - PRIO_MIN;
942
943 min_prio -= PRIO_MIN;
944 if (min_prio < 0)
945 min_prio = 0;
946
947 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1574 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
948 if (AvFILLp (coro_ready [prio]) >= 0) 1575 if (AvFILLp (coro_ready [prio]) >= 0)
949 {
950 coro_nready--;
951 return av_shift (coro_ready [prio]); 1576 return av_shift (coro_ready [prio]);
952 }
953 1577
954 return 0; 1578 return 0;
955} 1579}
956 1580
957static void 1581static int
958api_ready (SV *coro) 1582api_ready (pTHX_ SV *coro_sv)
959{ 1583{
960 dTHX; 1584 struct coro *coro;
1585 SV *sv_hook;
1586 void (*xs_hook)(void);
961 1587
962 if (SvROK (coro)) 1588 if (SvROK (coro_sv))
963 coro = SvRV (coro); 1589 coro_sv = SvRV (coro_sv);
964 1590
965 LOCK; 1591 coro = SvSTATE (coro_sv);
966 coro_enq (SvREFCNT_inc (coro));
967 UNLOCK;
968}
969 1592
1593 if (coro->flags & CF_READY)
1594 return 0;
1595
1596 coro->flags |= CF_READY;
1597
1598 sv_hook = coro_nready ? 0 : coro_readyhook;
1599 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1600
1601 coro_enq (aTHX_ coro);
1602 ++coro_nready;
1603
1604 if (sv_hook)
1605 {
1606 dSP;
1607
1608 ENTER;
1609 SAVETMPS;
1610
1611 PUSHMARK (SP);
1612 PUTBACK;
1613 call_sv (sv_hook, G_VOID | G_DISCARD);
1614
1615 FREETMPS;
1616 LEAVE;
1617 }
1618
1619 if (xs_hook)
1620 xs_hook ();
1621
1622 return 1;
1623}
1624
970static void 1625static int
1626api_is_ready (pTHX_ SV *coro_sv)
1627{
1628 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1629}
1630
1631/* expects to own a reference to next->hv */
1632INLINE void
1633prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1634{
1635 SV *prev_sv = SvRV (coro_current);
1636
1637 ta->prev = SvSTATE_hv (prev_sv);
1638 ta->next = next;
1639
1640 TRANSFER_CHECK (*ta);
1641
1642 SvRV_set (coro_current, (SV *)next->hv);
1643
1644 free_coro_mortal (aTHX);
1645 coro_mortal = prev_sv;
1646}
1647
1648static void
971prepare_schedule (struct transfer_args *ta) 1649prepare_schedule (pTHX_ struct coro_transfer_args *ta)
972{ 1650{
973 SV *current, *prev, *next;
974
975 current = GvSV (coro_current);
976
977 for (;;) 1651 for (;;)
978 { 1652 {
979 LOCK; 1653 SV *next_sv = coro_deq (aTHX);
980 next = coro_deq (PRIO_MIN);
981 UNLOCK;
982 1654
983 if (next) 1655 if (expect_true (next_sv))
1656 {
1657 struct coro *next = SvSTATE_hv (next_sv);
1658
1659 /* cannot transfer to destroyed coros, skip and look for next */
1660 if (expect_false (next->flags & CF_DESTROYED))
1661 SvREFCNT_dec (next_sv); /* coro_nready has already been taken care of by destroy */
1662 else
1663 {
1664 next->flags &= ~CF_READY;
1665 --coro_nready;
1666
1667 prepare_schedule_to (aTHX_ ta, next);
984 break; 1668 break;
1669 }
1670 }
1671 else
1672 {
1673 /* nothing to schedule: call the idle handler */
1674 dSP;
1675
1676 ENTER;
1677 SAVETMPS;
1678
1679 PUSHMARK (SP);
1680 PUTBACK;
1681 call_sv (get_sv ("Coro::idle", FALSE), G_VOID | G_DISCARD);
1682
1683 FREETMPS;
1684 LEAVE;
1685 }
1686 }
1687}
1688
1689INLINE void
1690prepare_cede (pTHX_ struct coro_transfer_args *ta)
1691{
1692 api_ready (aTHX_ coro_current);
1693 prepare_schedule (aTHX_ ta);
1694}
1695
1696INLINE void
1697prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1698{
1699 SV *prev = SvRV (coro_current);
1700
1701 if (coro_nready)
1702 {
1703 prepare_schedule (aTHX_ ta);
1704 api_ready (aTHX_ prev);
1705 }
1706 else
1707 prepare_nop (aTHX_ ta);
1708}
1709
1710static void
1711api_schedule (pTHX)
1712{
1713 struct coro_transfer_args ta;
1714
1715 prepare_schedule (aTHX_ &ta);
1716 TRANSFER (ta, 1);
1717}
1718
1719static void
1720api_schedule_to (pTHX_ SV *coro_sv)
1721{
1722 struct coro_transfer_args ta;
1723 struct coro *next = SvSTATE (coro_sv);
1724
1725 SvREFCNT_inc_NN (coro_sv);
1726 prepare_schedule_to (aTHX_ &ta, next);
1727}
1728
1729static int
1730api_cede (pTHX)
1731{
1732 struct coro_transfer_args ta;
1733
1734 prepare_cede (aTHX_ &ta);
1735
1736 if (expect_true (ta.prev != ta.next))
1737 {
1738 TRANSFER (ta, 1);
1739 return 1;
1740 }
1741 else
1742 return 0;
1743}
1744
1745static int
1746api_cede_notself (pTHX)
1747{
1748 if (coro_nready)
1749 {
1750 struct coro_transfer_args ta;
1751
1752 prepare_cede_notself (aTHX_ &ta);
1753 TRANSFER (ta, 1);
1754 return 1;
1755 }
1756 else
1757 return 0;
1758}
1759
1760static void
1761api_trace (pTHX_ SV *coro_sv, int flags)
1762{
1763 struct coro *coro = SvSTATE (coro_sv);
1764
1765 if (flags & CC_TRACE)
1766 {
1767 if (!coro->cctx)
1768 coro->cctx = cctx_new_run ();
1769 else if (!(coro->cctx->flags & CC_TRACE))
1770 croak ("cannot enable tracing on coroutine with custom stack,");
1771
1772 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1773 }
1774 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1775 {
1776 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1777
1778 if (coro->flags & CF_RUNNING)
1779 PL_runops = RUNOPS_DEFAULT;
1780 else
1781 coro->slot->runops = RUNOPS_DEFAULT;
1782 }
1783}
1784
1785static void
1786coro_call_on_destroy (pTHX_ struct coro *coro)
1787{
1788 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1789 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1790
1791 if (on_destroyp)
1792 {
1793 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1794
1795 while (AvFILLp (on_destroy) >= 0)
1796 {
1797 dSP; /* don't disturb outer sp */
1798 SV *cb = av_pop (on_destroy);
1799
1800 PUSHMARK (SP);
1801
1802 if (statusp)
1803 {
1804 int i;
1805 AV *status = (AV *)SvRV (*statusp);
1806 EXTEND (SP, AvFILLp (status) + 1);
1807
1808 for (i = 0; i <= AvFILLp (status); ++i)
1809 PUSHs (AvARRAY (status)[i]);
1810 }
1811
1812 PUTBACK;
1813 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1814 }
1815 }
1816}
1817
1818static void
1819slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1820{
1821 int i;
1822 HV *hv = (HV *)SvRV (coro_current);
1823 AV *av = newAV ();
1824
1825 av_extend (av, items - 1);
1826 for (i = 0; i < items; ++i)
1827 av_push (av, SvREFCNT_inc_NN (arg [i]));
1828
1829 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1830
1831 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1832 api_ready (aTHX_ sv_manager);
1833
1834 frame->prepare = prepare_schedule;
1835 frame->check = slf_check_repeat;
1836}
1837
1838/*****************************************************************************/
1839/* async pool handler */
1840
1841static int
1842slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1843{
1844 HV *hv = (HV *)SvRV (coro_current);
1845 struct coro *coro = (struct coro *)frame->data;
1846
1847 if (!coro->invoke_cb)
1848 return 1; /* loop till we have invoke */
1849 else
1850 {
1851 hv_store (hv, "desc", sizeof ("desc") - 1,
1852 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1853
1854 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
985 1855
986 { 1856 {
987 dSP; 1857 dSP;
988 1858 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
989 ENTER;
990 SAVETMPS;
991
992 PUSHMARK (SP);
993 PUTBACK; 1859 PUTBACK;
994 call_sv (GvSV (coro_idle), G_DISCARD);
995
996 FREETMPS;
997 LEAVE;
998 } 1860 }
1861
1862 SvREFCNT_dec (GvAV (PL_defgv));
1863 GvAV (PL_defgv) = coro->invoke_av;
1864 coro->invoke_av = 0;
1865
1866 return 0;
1867 }
1868}
1869
1870static void
1871slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1872{
1873 HV *hv = (HV *)SvRV (coro_current);
1874 struct coro *coro = SvSTATE_hv ((SV *)hv);
1875
1876 if (expect_true (coro->saved_deffh))
999 } 1877 {
1878 /* subsequent iteration */
1879 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1880 coro->saved_deffh = 0;
1000 1881
1001 prev = SvRV (current); 1882 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1002 SvRV (current) = next; 1883 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1884 {
1885 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1886 coro->invoke_av = newAV ();
1003 1887
1004 /* free this only after the transfer */ 1888 frame->prepare = prepare_nop;
1005 LOCK; 1889 }
1006 free_coro_mortal (); 1890 else
1007 UNLOCK; 1891 {
1008 coro_mortal = prev; 1892 av_clear (GvAV (PL_defgv));
1893 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1009 1894
1010 ta->prev = SvSTATE (prev); 1895 coro->prio = 0;
1011 ta->next = SvSTATE (next);
1012 ta->flags = TRANSFER_SAVE_ALL;
1013}
1014 1896
1897 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1898 api_trace (aTHX_ coro_current, 0);
1899
1900 frame->prepare = prepare_schedule;
1901 av_push (av_async_pool, SvREFCNT_inc (hv));
1902 }
1903 }
1904 else
1905 {
1906 /* first iteration, simply fall through */
1907 frame->prepare = prepare_nop;
1908 }
1909
1910 frame->check = slf_check_pool_handler;
1911 frame->data = (void *)coro;
1912}
1913
1914/*****************************************************************************/
1915/* rouse callback */
1916
1917#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
1918
1919static void
1920coro_rouse_callback (pTHX_ CV *cv)
1921{
1922 dXSARGS;
1923 SV *data = (SV *)GENSUB_ARG;
1924
1925 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1926 {
1927 /* first call, set args */
1928 AV *av = newAV ();
1929 SV *coro = SvRV (data);
1930
1931 SvRV_set (data, (SV *)av);
1932 api_ready (aTHX_ coro);
1933 SvREFCNT_dec (coro);
1934
1935 /* better take a full copy of the arguments */
1936 while (items--)
1937 av_store (av, items, newSVsv (ST (items)));
1938 }
1939
1940 XSRETURN_EMPTY;
1941}
1942
1015static void 1943static int
1944slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
1945{
1946 SV *data = (SV *)frame->data;
1947
1948 if (CORO_THROW)
1949 return 0;
1950
1951 if (SvTYPE (SvRV (data)) != SVt_PVAV)
1952 return 1;
1953
1954 /* now push all results on the stack */
1955 {
1956 dSP;
1957 AV *av = (AV *)SvRV (data);
1958 int i;
1959
1960 EXTEND (SP, AvFILLp (av) + 1);
1961 for (i = 0; i <= AvFILLp (av); ++i)
1962 PUSHs (sv_2mortal (AvARRAY (av)[i]));
1963
1964 /* we have stolen the elements, so ste length to zero and free */
1965 AvFILLp (av) = -1;
1966 av_undef (av);
1967
1968 PUTBACK;
1969 }
1970
1971 return 0;
1972}
1973
1974static void
1975slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1976{
1977 SV *cb;
1978
1979 if (items)
1980 cb = arg [0];
1981 else
1982 {
1983 struct coro *coro = SvSTATE_current;
1984
1985 if (!coro->rouse_cb)
1986 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
1987
1988 cb = sv_2mortal (coro->rouse_cb);
1989 coro->rouse_cb = 0;
1990 }
1991
1992 if (!SvROK (cb)
1993 || SvTYPE (SvRV (cb)) != SVt_PVCV
1994 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
1995 croak ("Coro::rouse_wait called with illegal callback argument,");
1996
1997 {
1998 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
1999 SV *data = (SV *)GENSUB_ARG;
2000
2001 frame->data = (void *)data;
2002 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2003 frame->check = slf_check_rouse_wait;
2004 }
2005}
2006
2007static SV *
2008coro_new_rouse_cb (pTHX)
2009{
2010 HV *hv = (HV *)SvRV (coro_current);
2011 struct coro *coro = SvSTATE_hv (hv);
2012 SV *data = newRV_inc ((SV *)hv);
2013 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2014
2015 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2016 SvREFCNT_dec (data); /* magicext increases the refcount */
2017
2018 SvREFCNT_dec (coro->rouse_cb);
2019 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2020
2021 return cb;
2022}
2023
2024/*****************************************************************************/
2025/* schedule-like-function opcode (SLF) */
2026
2027static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2028static const CV *slf_cv;
2029static SV **slf_argv;
2030static int slf_argc, slf_arga; /* count, allocated */
2031static I32 slf_ax; /* top of stack, for restore */
2032
2033/* this restores the stack in the case we patched the entersub, to */
2034/* recreate the stack frame as perl will on following calls */
2035/* since entersub cleared the stack */
2036static OP *
2037pp_restore (pTHX)
2038{
2039 int i;
2040 SV **SP = PL_stack_base + slf_ax;
2041
2042 PUSHMARK (SP);
2043
2044 EXTEND (SP, slf_argc + 1);
2045
2046 for (i = 0; i < slf_argc; ++i)
2047 PUSHs (sv_2mortal (slf_argv [i]));
2048
2049 PUSHs ((SV *)CvGV (slf_cv));
2050
2051 RETURNOP (slf_restore.op_first);
2052}
2053
2054static void
2055slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2056{
2057 SV **arg = (SV **)slf_frame.data;
2058
2059 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2060}
2061
2062static void
2063slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2064{
2065 if (items != 2)
2066 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2067
2068 frame->prepare = slf_prepare_transfer;
2069 frame->check = slf_check_nop;
2070 frame->data = (void *)arg; /* let's hope it will stay valid */
2071}
2072
2073static void
2074slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2075{
2076 frame->prepare = prepare_schedule;
2077 frame->check = slf_check_nop;
2078}
2079
2080static void
1016prepare_cede (struct transfer_args *ta) 2081slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
1017{ 2082{
1018 LOCK; 2083 struct coro *next = (struct coro *)slf_frame.data;
1019 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1020 UNLOCK;
1021 2084
2085 SvREFCNT_inc_NN (next->hv);
1022 prepare_schedule (ta); 2086 prepare_schedule_to (aTHX_ ta, next);
1023} 2087}
1024 2088
1025static void 2089static void
1026api_schedule (void) 2090slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1027{ 2091{
1028 dTHX; 2092 if (!items)
2093 croak ("Coro::schedule_to expects a coroutine argument, caught");
2094
2095 frame->data = (void *)SvSTATE (arg [0]);
2096 frame->prepare = slf_prepare_schedule_to;
2097 frame->check = slf_check_nop;
2098}
2099
2100static void
2101slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2102{
2103 api_ready (aTHX_ SvRV (coro_current));
2104
2105 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2106}
2107
2108static void
2109slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2110{
2111 frame->prepare = prepare_cede;
2112 frame->check = slf_check_nop;
2113}
2114
2115static void
2116slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2117{
2118 frame->prepare = prepare_cede_notself;
2119 frame->check = slf_check_nop;
2120}
2121
2122/*
2123 * these not obviously related functions are all rolled into one
2124 * function to increase chances that they all will call transfer with the same
2125 * stack offset
2126 * SLF stands for "schedule-like-function".
2127 */
2128static OP *
2129pp_slf (pTHX)
2130{
2131 I32 checkmark; /* mark SP to see how many elements check has pushed */
2132
2133 /* set up the slf frame, unless it has already been set-up */
2134 /* the latter happens when a new coro has been started */
2135 /* or when a new cctx was attached to an existing coroutine */
2136 if (expect_true (!slf_frame.prepare))
2137 {
2138 /* first iteration */
2139 dSP;
2140 SV **arg = PL_stack_base + TOPMARK + 1;
2141 int items = SP - arg; /* args without function object */
2142 SV *gv = *sp;
2143
2144 /* do a quick consistency check on the "function" object, and if it isn't */
2145 /* for us, divert to the real entersub */
2146 if (SvTYPE (gv) != SVt_PVGV
2147 || !GvCV (gv)
2148 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2149 return PL_ppaddr[OP_ENTERSUB](aTHX);
2150
2151 if (!(PL_op->op_flags & OPf_STACKED))
2152 {
2153 /* ampersand-form of call, use @_ instead of stack */
2154 AV *av = GvAV (PL_defgv);
2155 arg = AvARRAY (av);
2156 items = AvFILLp (av) + 1;
2157 }
2158
2159 /* now call the init function, which needs to set up slf_frame */
2160 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2161 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2162
2163 /* pop args */
2164 SP = PL_stack_base + POPMARK;
2165
2166 PUTBACK;
2167 }
2168
2169 /* now that we have a slf_frame, interpret it! */
2170 /* we use a callback system not to make the code needlessly */
2171 /* complicated, but so we can run multiple perl coros from one cctx */
2172
2173 do
2174 {
1029 struct transfer_args ta; 2175 struct coro_transfer_args ta;
1030 2176
1031 prepare_schedule (&ta); 2177 slf_frame.prepare (aTHX_ &ta);
1032 TRANSFER (ta); 2178 TRANSFER (ta, 0);
1033}
1034 2179
2180 checkmark = PL_stack_sp - PL_stack_base;
2181 }
2182 while (slf_frame.check (aTHX_ &slf_frame));
2183
2184 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2185
2186 /* exception handling */
2187 if (expect_false (CORO_THROW))
2188 {
2189 SV *exception = sv_2mortal (CORO_THROW);
2190
2191 CORO_THROW = 0;
2192 sv_setsv (ERRSV, exception);
2193 croak (0);
2194 }
2195
2196 /* return value handling - mostly like entersub */
2197 /* make sure we put something on the stack in scalar context */
2198 if (GIMME_V == G_SCALAR)
2199 {
2200 dSP;
2201 SV **bot = PL_stack_base + checkmark;
2202
2203 if (sp == bot) /* too few, push undef */
2204 bot [1] = &PL_sv_undef;
2205 else if (sp != bot + 1) /* too many, take last one */
2206 bot [1] = *sp;
2207
2208 SP = bot + 1;
2209
2210 PUTBACK;
2211 }
2212
2213 return NORMAL;
2214}
2215
2216static void
2217api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2218{
2219 int i;
2220 SV **arg = PL_stack_base + ax;
2221 int items = PL_stack_sp - arg + 1;
2222
2223 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2224
2225 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2226 && PL_op->op_ppaddr != pp_slf)
2227 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2228
2229 CvFLAGS (cv) |= CVf_SLF;
2230 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2231 slf_cv = cv;
2232
2233 /* we patch the op, and then re-run the whole call */
2234 /* we have to put the same argument on the stack for this to work */
2235 /* and this will be done by pp_restore */
2236 slf_restore.op_next = (OP *)&slf_restore;
2237 slf_restore.op_type = OP_CUSTOM;
2238 slf_restore.op_ppaddr = pp_restore;
2239 slf_restore.op_first = PL_op;
2240
2241 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2242
2243 if (PL_op->op_flags & OPf_STACKED)
2244 {
2245 if (items > slf_arga)
2246 {
2247 slf_arga = items;
2248 free (slf_argv);
2249 slf_argv = malloc (slf_arga * sizeof (SV *));
2250 }
2251
2252 slf_argc = items;
2253
2254 for (i = 0; i < items; ++i)
2255 slf_argv [i] = SvREFCNT_inc (arg [i]);
2256 }
2257 else
2258 slf_argc = 0;
2259
2260 PL_op->op_ppaddr = pp_slf;
2261 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2262
2263 PL_op = (OP *)&slf_restore;
2264}
2265
2266/*****************************************************************************/
2267/* PerlIO::cede */
2268
2269typedef struct
2270{
2271 PerlIOBuf base;
2272 NV next, every;
2273} PerlIOCede;
2274
2275static IV
2276PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2277{
2278 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2279
2280 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2281 self->next = nvtime () + self->every;
2282
2283 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2284}
2285
2286static SV *
2287PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2288{
2289 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2290
2291 return newSVnv (self->every);
2292}
2293
2294static IV
2295PerlIOCede_flush (pTHX_ PerlIO *f)
2296{
2297 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2298 double now = nvtime ();
2299
2300 if (now >= self->next)
2301 {
2302 api_cede (aTHX);
2303 self->next = now + self->every;
2304 }
2305
2306 return PerlIOBuf_flush (aTHX_ f);
2307}
2308
2309static PerlIO_funcs PerlIO_cede =
2310{
2311 sizeof(PerlIO_funcs),
2312 "cede",
2313 sizeof(PerlIOCede),
2314 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2315 PerlIOCede_pushed,
2316 PerlIOBuf_popped,
2317 PerlIOBuf_open,
2318 PerlIOBase_binmode,
2319 PerlIOCede_getarg,
2320 PerlIOBase_fileno,
2321 PerlIOBuf_dup,
2322 PerlIOBuf_read,
2323 PerlIOBuf_unread,
2324 PerlIOBuf_write,
2325 PerlIOBuf_seek,
2326 PerlIOBuf_tell,
2327 PerlIOBuf_close,
2328 PerlIOCede_flush,
2329 PerlIOBuf_fill,
2330 PerlIOBase_eof,
2331 PerlIOBase_error,
2332 PerlIOBase_clearerr,
2333 PerlIOBase_setlinebuf,
2334 PerlIOBuf_get_base,
2335 PerlIOBuf_bufsiz,
2336 PerlIOBuf_get_ptr,
2337 PerlIOBuf_get_cnt,
2338 PerlIOBuf_set_ptrcnt,
2339};
2340
2341/*****************************************************************************/
2342/* Coro::Semaphore & Coro::Signal */
2343
2344static SV *
2345coro_waitarray_new (pTHX_ int count)
2346{
2347 /* a semaphore contains a counter IV in $sem->[0] and any waiters after that */
2348 AV *av = newAV ();
2349 SV **ary;
2350
2351 /* unfortunately, building manually saves memory */
2352 Newx (ary, 2, SV *);
2353 AvALLOC (av) = ary;
2354 /*AvARRAY (av) = ary;*/
2355 SvPVX ((SV *)av) = (char *)ary; /* 5.8.8 needs this syntax instead of AvARRAY = ary */
2356 AvMAX (av) = 1;
2357 AvFILLp (av) = 0;
2358 ary [0] = newSViv (count);
2359
2360 return newRV_noinc ((SV *)av);
2361}
2362
2363/* semaphore */
2364
2365static void
2366coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2367{
2368 SV *count_sv = AvARRAY (av)[0];
2369 IV count = SvIVX (count_sv);
2370
2371 count += adjust;
2372 SvIVX (count_sv) = count;
2373
2374 /* now wake up as many waiters as are expected to lock */
2375 while (count > 0 && AvFILLp (av) > 0)
2376 {
2377 SV *cb;
2378
2379 /* swap first two elements so we can shift a waiter */
2380 AvARRAY (av)[0] = AvARRAY (av)[1];
2381 AvARRAY (av)[1] = count_sv;
2382 cb = av_shift (av);
2383
2384 if (SvOBJECT (cb))
2385 {
2386 api_ready (aTHX_ cb);
2387 --count;
2388 }
2389 else if (SvTYPE (cb) == SVt_PVCV)
2390 {
2391 dSP;
2392 PUSHMARK (SP);
2393 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2394 PUTBACK;
2395 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2396 }
2397
2398 SvREFCNT_dec (cb);
2399 }
2400}
2401
2402static void
2403coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2404{
2405 /* call $sem->adjust (0) to possibly wake up some other waiters */
2406 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2407}
2408
1035static void 2409static int
1036api_cede (void) 2410slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
1037{ 2411{
1038 dTHX; 2412 AV *av = (AV *)frame->data;
1039 struct transfer_args ta; 2413 SV *count_sv = AvARRAY (av)[0];
1040 2414
1041 prepare_cede (&ta); 2415 /* if we are about to throw, don't actually acquire the lock, just throw */
1042 TRANSFER (ta); 2416 if (CORO_THROW)
1043} 2417 return 0;
2418 else if (SvIVX (count_sv) > 0)
2419 {
2420 SvSTATE_current->on_destroy = 0;
1044 2421
2422 if (acquire)
2423 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2424 else
2425 coro_semaphore_adjust (aTHX_ av, 0);
2426
2427 return 0;
2428 }
2429 else
2430 {
2431 int i;
2432 /* if we were woken up but can't down, we look through the whole */
2433 /* waiters list and only add us if we aren't in there already */
2434 /* this avoids some degenerate memory usage cases */
2435
2436 for (i = 1; i <= AvFILLp (av); ++i)
2437 if (AvARRAY (av)[i] == SvRV (coro_current))
2438 return 1;
2439
2440 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2441 return 1;
2442 }
2443}
2444
2445static int
2446slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2447{
2448 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2449}
2450
2451static int
2452slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2453{
2454 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2455}
2456
2457static void
2458slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2459{
2460 AV *av = (AV *)SvRV (arg [0]);
2461
2462 if (SvIVX (AvARRAY (av)[0]) > 0)
2463 {
2464 frame->data = (void *)av;
2465 frame->prepare = prepare_nop;
2466 }
2467 else
2468 {
2469 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2470
2471 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2472 frame->prepare = prepare_schedule;
2473
2474 /* to avoid race conditions when a woken-up coro gets terminated */
2475 /* we arrange for a temporary on_destroy that calls adjust (0) */
2476 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2477 }
2478}
2479
2480static void
2481slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2482{
2483 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2484 frame->check = slf_check_semaphore_down;
2485}
2486
2487static void
2488slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2489{
2490 if (items >= 2)
2491 {
2492 /* callback form */
2493 AV *av = (AV *)SvRV (arg [0]);
2494 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2495
2496 av_push (av, (SV *)SvREFCNT_inc_NN (cb_cv));
2497
2498 if (SvIVX (AvARRAY (av)[0]) > 0)
2499 coro_semaphore_adjust (aTHX_ av, 0);
2500
2501 frame->prepare = prepare_nop;
2502 frame->check = slf_check_nop;
2503 }
2504 else
2505 {
2506 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2507 frame->check = slf_check_semaphore_wait;
2508 }
2509}
2510
2511/* signal */
2512
2513static void
2514coro_signal_wake (pTHX_ AV *av, int count)
2515{
2516 SvIVX (AvARRAY (av)[0]) = 0;
2517
2518 /* now signal count waiters */
2519 while (count > 0 && AvFILLp (av) > 0)
2520 {
2521 SV *cb;
2522
2523 /* swap first two elements so we can shift a waiter */
2524 cb = AvARRAY (av)[0];
2525 AvARRAY (av)[0] = AvARRAY (av)[1];
2526 AvARRAY (av)[1] = cb;
2527
2528 cb = av_shift (av);
2529
2530 api_ready (aTHX_ cb);
2531 sv_setiv (cb, 0); /* signal waiter */
2532 SvREFCNT_dec (cb);
2533
2534 --count;
2535 }
2536}
2537
2538static int
2539slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2540{
2541 /* if we are about to throw, also stop waiting */
2542 return SvROK ((SV *)frame->data) && !CORO_THROW;
2543}
2544
2545static void
2546slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2547{
2548 AV *av = (AV *)SvRV (arg [0]);
2549
2550 if (SvIVX (AvARRAY (av)[0]))
2551 {
2552 SvIVX (AvARRAY (av)[0]) = 0;
2553 frame->prepare = prepare_nop;
2554 frame->check = slf_check_nop;
2555 }
2556 else
2557 {
2558 SV *waiter = newRV_inc (SvRV (coro_current)); /* owned by signal av */
2559
2560 av_push (av, waiter);
2561
2562 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2563 frame->prepare = prepare_schedule;
2564 frame->check = slf_check_signal_wait;
2565 }
2566}
2567
2568/*****************************************************************************/
2569/* Coro::AIO */
2570
2571#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2572
2573/* helper storage struct */
2574struct io_state
2575{
2576 int errorno;
2577 I32 laststype; /* U16 in 5.10.0 */
2578 int laststatval;
2579 Stat_t statcache;
2580};
2581
2582static void
2583coro_aio_callback (pTHX_ CV *cv)
2584{
2585 dXSARGS;
2586 AV *state = (AV *)GENSUB_ARG;
2587 SV *coro = av_pop (state);
2588 SV *data_sv = newSV (sizeof (struct io_state));
2589
2590 av_extend (state, items - 1);
2591
2592 sv_upgrade (data_sv, SVt_PV);
2593 SvCUR_set (data_sv, sizeof (struct io_state));
2594 SvPOK_only (data_sv);
2595
2596 {
2597 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2598
2599 data->errorno = errno;
2600 data->laststype = PL_laststype;
2601 data->laststatval = PL_laststatval;
2602 data->statcache = PL_statcache;
2603 }
2604
2605 /* now build the result vector out of all the parameters and the data_sv */
2606 {
2607 int i;
2608
2609 for (i = 0; i < items; ++i)
2610 av_push (state, SvREFCNT_inc_NN (ST (i)));
2611 }
2612
2613 av_push (state, data_sv);
2614
2615 api_ready (aTHX_ coro);
2616 SvREFCNT_dec (coro);
2617 SvREFCNT_dec ((AV *)state);
2618}
2619
2620static int
2621slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2622{
2623 AV *state = (AV *)frame->data;
2624
2625 /* if we are about to throw, return early */
2626 /* this does not cancel the aio request, but at least */
2627 /* it quickly returns */
2628 if (CORO_THROW)
2629 return 0;
2630
2631 /* one element that is an RV? repeat! */
2632 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2633 return 1;
2634
2635 /* restore status */
2636 {
2637 SV *data_sv = av_pop (state);
2638 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2639
2640 errno = data->errorno;
2641 PL_laststype = data->laststype;
2642 PL_laststatval = data->laststatval;
2643 PL_statcache = data->statcache;
2644
2645 SvREFCNT_dec (data_sv);
2646 }
2647
2648 /* push result values */
2649 {
2650 dSP;
2651 int i;
2652
2653 EXTEND (SP, AvFILLp (state) + 1);
2654 for (i = 0; i <= AvFILLp (state); ++i)
2655 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2656
2657 PUTBACK;
2658 }
2659
2660 return 0;
2661}
2662
2663static void
2664slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2665{
2666 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2667 SV *coro_hv = SvRV (coro_current);
2668 struct coro *coro = SvSTATE_hv (coro_hv);
2669
2670 /* put our coroutine id on the state arg */
2671 av_push (state, SvREFCNT_inc_NN (coro_hv));
2672
2673 /* first see whether we have a non-zero priority and set it as AIO prio */
2674 if (coro->prio)
2675 {
2676 dSP;
2677
2678 static SV *prio_cv;
2679 static SV *prio_sv;
2680
2681 if (expect_false (!prio_cv))
2682 {
2683 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2684 prio_sv = newSViv (0);
2685 }
2686
2687 PUSHMARK (SP);
2688 sv_setiv (prio_sv, coro->prio);
2689 XPUSHs (prio_sv);
2690
2691 PUTBACK;
2692 call_sv (prio_cv, G_VOID | G_DISCARD);
2693 }
2694
2695 /* now call the original request */
2696 {
2697 dSP;
2698 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2699 int i;
2700
2701 PUSHMARK (SP);
2702
2703 /* first push all args to the stack */
2704 EXTEND (SP, items + 1);
2705
2706 for (i = 0; i < items; ++i)
2707 PUSHs (arg [i]);
2708
2709 /* now push the callback closure */
2710 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2711
2712 /* now call the AIO function - we assume our request is uncancelable */
2713 PUTBACK;
2714 call_sv ((SV *)req, G_VOID | G_DISCARD);
2715 }
2716
2717 /* now that the requets is going, we loop toll we have a result */
2718 frame->data = (void *)state;
2719 frame->prepare = prepare_schedule;
2720 frame->check = slf_check_aio_req;
2721}
2722
2723static void
2724coro_aio_req_xs (pTHX_ CV *cv)
2725{
2726 dXSARGS;
2727
2728 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2729
2730 XSRETURN_EMPTY;
2731}
2732
2733/*****************************************************************************/
2734
2735#if CORO_CLONE
2736# include "clone.c"
2737#endif
2738
1045MODULE = Coro::State PACKAGE = Coro::State 2739MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1046 2740
1047PROTOTYPES: DISABLE 2741PROTOTYPES: DISABLE
1048 2742
1049BOOT: 2743BOOT:
1050{ 2744{
1051#ifdef USE_ITHREADS 2745#ifdef USE_ITHREADS
1052 MUTEX_INIT (&coro_mutex); 2746# if CORO_PTHREAD
2747 coro_thx = PERL_GET_CONTEXT;
2748# endif
1053#endif 2749#endif
1054 BOOT_PAGESIZE; 2750 BOOT_PAGESIZE;
1055 2751
2752 cctx_current = cctx_new_empty ();
2753
2754 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2755 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2756
2757 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2758 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2759 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2760
2761 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2762 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2763 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2764
1056 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2765 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1057 2766
1058 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2767 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1059 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2768 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1060 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2769 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2770 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1061 2771
1062 main_mainstack = PL_mainstack; 2772 main_mainstack = PL_mainstack;
2773 main_top_env = PL_top_env;
1063 2774
2775 while (main_top_env->je_prev)
2776 main_top_env = main_top_env->je_prev;
2777
2778 {
2779 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2780
2781 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2782 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2783
2784 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2785 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2786 }
2787
1064 coroapi.ver = CORO_API_VERSION; 2788 coroapi.ver = CORO_API_VERSION;
2789 coroapi.rev = CORO_API_REVISION;
2790
1065 coroapi.transfer = api_transfer; 2791 coroapi.transfer = api_transfer;
2792
2793 coroapi.sv_state = SvSTATE_;
2794 coroapi.execute_slf = api_execute_slf;
2795 coroapi.prepare_nop = prepare_nop;
2796 coroapi.prepare_schedule = prepare_schedule;
2797 coroapi.prepare_cede = prepare_cede;
2798 coroapi.prepare_cede_notself = prepare_cede_notself;
2799
2800 {
2801 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2802
2803 if (!svp) croak ("Time::HiRes is required");
2804 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2805
2806 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2807 }
1066 2808
1067 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2809 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1068} 2810}
1069 2811
1070SV * 2812SV *
1071new (char *klass, ...) 2813new (char *klass, ...)
2814 ALIAS:
2815 Coro::new = 1
1072 CODE: 2816 CODE:
1073{ 2817{
1074 struct coro *coro; 2818 struct coro *coro;
2819 MAGIC *mg;
1075 HV *hv; 2820 HV *hv;
2821 CV *cb;
1076 int i; 2822 int i;
1077 2823
2824 if (items > 1)
2825 {
2826 cb = coro_sv_2cv (aTHX_ ST (1));
2827
2828 if (!ix)
2829 {
2830 if (CvISXSUB (cb))
2831 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2832
2833 if (!CvROOT (cb))
2834 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2835 }
2836 }
2837
1078 Newz (0, coro, 1, struct coro); 2838 Newz (0, coro, 1, struct coro);
1079 coro->args = newAV (); 2839 coro->args = newAV ();
2840 coro->flags = CF_NEW;
1080 2841
2842 if (coro_first) coro_first->prev = coro;
2843 coro->next = coro_first;
2844 coro_first = coro;
2845
1081 hv = newHV (); 2846 coro->hv = hv = newHV ();
1082 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 2847 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2848 mg->mg_flags |= MGf_DUP;
1083 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 2849 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1084 2850
2851 if (items > 1)
2852 {
2853 av_extend (coro->args, items - 1 + ix - 1);
2854
2855 if (ix)
2856 {
2857 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2858 cb = cv_coro_run;
2859 }
2860
2861 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2862
1085 for (i = 1; i < items; i++) 2863 for (i = 2; i < items; i++)
1086 av_push (coro->args, newSVsv (ST (i))); 2864 av_push (coro->args, newSVsv (ST (i)));
2865 }
1087} 2866}
1088 OUTPUT: 2867 OUTPUT:
1089 RETVAL 2868 RETVAL
1090 2869
1091void 2870void
1092_set_stacklevel (...) 2871transfer (...)
1093 ALIAS: 2872 PROTOTYPE: $$
1094 Coro::State::transfer = 1 2873 CODE:
1095 Coro::schedule = 2 2874 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1096 Coro::cede = 3
1097 Coro::Cont::yield = 4
1098 CODE:
1099{
1100 struct transfer_args ta;
1101 2875
1102 switch (ix) 2876bool
1103 { 2877_destroy (SV *coro_sv)
1104 case 0: 2878 CODE:
1105 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0))); 2879 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1106 ta.next = 0; 2880 OUTPUT:
1107 ta.flags = TRANSFER_SET_STACKLEVEL; 2881 RETVAL
1108 break;
1109
1110 case 1:
1111 if (items != 3)
1112 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1113
1114 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1115 break;
1116
1117 case 2:
1118 prepare_schedule (&ta);
1119 break;
1120
1121 case 3:
1122 prepare_cede (&ta);
1123 break;
1124
1125 case 4:
1126 {
1127 SV *yieldstack;
1128 SV *sv;
1129 AV *defav = GvAV (PL_defgv);
1130
1131 yieldstack = *hv_fetch (
1132 (HV *)SvRV (GvSV (coro_current)),
1133 "yieldstack", sizeof ("yieldstack") - 1,
1134 0
1135 );
1136
1137 /* set up @_ -- ugly */
1138 av_clear (defav);
1139 av_fill (defav, items - 1);
1140 while (items--)
1141 av_store (defav, items, SvREFCNT_inc (ST(items)));
1142
1143 sv = av_pop ((AV *)SvRV (yieldstack));
1144 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1145 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1146 ta.flags = 0;
1147 SvREFCNT_dec (sv);
1148 }
1149 break;
1150
1151 }
1152
1153 TRANSFER (ta);
1154}
1155 2882
1156void 2883void
1157_clone_state_from (SV *dst, SV *src)
1158 CODE:
1159{
1160 struct coro *coro_src = SvSTATE (src);
1161
1162 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1163
1164 ++coro_src->refcnt;
1165 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1166}
1167
1168void
1169_exit (code) 2884_exit (int code)
1170 int code
1171 PROTOTYPE: $ 2885 PROTOTYPE: $
1172 CODE: 2886 CODE:
1173 _exit (code); 2887 _exit (code);
1174 2888
2889SV *
2890clone (Coro::State coro)
2891 CODE:
2892{
2893#if CORO_CLONE
2894 struct coro *ncoro = coro_clone (coro);
2895 MAGIC *mg;
2896 /* TODO: too much duplication */
2897 ncoro->hv = newHV ();
2898 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
2899 mg->mg_flags |= MGf_DUP;
2900 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
2901#else
2902 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
2903#endif
2904}
2905 OUTPUT:
2906 RETVAL
2907
2908int
2909cctx_stacksize (int new_stacksize = 0)
2910 PROTOTYPE: ;$
2911 CODE:
2912 RETVAL = cctx_stacksize;
2913 if (new_stacksize)
2914 {
2915 cctx_stacksize = new_stacksize;
2916 ++cctx_gen;
2917 }
2918 OUTPUT:
2919 RETVAL
2920
2921int
2922cctx_max_idle (int max_idle = 0)
2923 PROTOTYPE: ;$
2924 CODE:
2925 RETVAL = cctx_max_idle;
2926 if (max_idle > 1)
2927 cctx_max_idle = max_idle;
2928 OUTPUT:
2929 RETVAL
2930
1175int 2931int
1176cctx_count () 2932cctx_count ()
2933 PROTOTYPE:
1177 CODE: 2934 CODE:
1178 RETVAL = cctx_count; 2935 RETVAL = cctx_count;
1179 OUTPUT: 2936 OUTPUT:
1180 RETVAL 2937 RETVAL
1181 2938
1182int 2939int
1183cctx_idle () 2940cctx_idle ()
2941 PROTOTYPE:
1184 CODE: 2942 CODE:
1185 RETVAL = cctx_idle; 2943 RETVAL = cctx_idle;
1186 OUTPUT: 2944 OUTPUT:
1187 RETVAL 2945 RETVAL
1188 2946
2947void
2948list ()
2949 PROTOTYPE:
2950 PPCODE:
2951{
2952 struct coro *coro;
2953 for (coro = coro_first; coro; coro = coro->next)
2954 if (coro->hv)
2955 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2956}
2957
2958void
2959call (Coro::State coro, SV *coderef)
2960 ALIAS:
2961 eval = 1
2962 CODE:
2963{
2964 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
2965 {
2966 struct coro temp;
2967
2968 if (!(coro->flags & CF_RUNNING))
2969 {
2970 PUTBACK;
2971 save_perl (aTHX_ &temp);
2972 load_perl (aTHX_ coro);
2973 }
2974
2975 {
2976 dSP;
2977 ENTER;
2978 SAVETMPS;
2979 PUTBACK;
2980 PUSHSTACK;
2981 PUSHMARK (SP);
2982
2983 if (ix)
2984 eval_sv (coderef, 0);
2985 else
2986 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2987
2988 POPSTACK;
2989 SPAGAIN;
2990 FREETMPS;
2991 LEAVE;
2992 PUTBACK;
2993 }
2994
2995 if (!(coro->flags & CF_RUNNING))
2996 {
2997 save_perl (aTHX_ coro);
2998 load_perl (aTHX_ &temp);
2999 SPAGAIN;
3000 }
3001 }
3002}
3003
3004SV *
3005is_ready (Coro::State coro)
3006 PROTOTYPE: $
3007 ALIAS:
3008 is_ready = CF_READY
3009 is_running = CF_RUNNING
3010 is_new = CF_NEW
3011 is_destroyed = CF_DESTROYED
3012 CODE:
3013 RETVAL = boolSV (coro->flags & ix);
3014 OUTPUT:
3015 RETVAL
3016
3017void
3018throw (Coro::State self, SV *throw = &PL_sv_undef)
3019 PROTOTYPE: $;$
3020 CODE:
3021{
3022 struct coro *current = SvSTATE_current;
3023 SV **throwp = self == current ? &CORO_THROW : &self->except;
3024 SvREFCNT_dec (*throwp);
3025 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3026}
3027
3028void
3029api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3030 PROTOTYPE: $;$
3031 C_ARGS: aTHX_ coro, flags
3032
3033SV *
3034has_cctx (Coro::State coro)
3035 PROTOTYPE: $
3036 CODE:
3037 RETVAL = boolSV (!!coro->cctx);
3038 OUTPUT:
3039 RETVAL
3040
3041int
3042is_traced (Coro::State coro)
3043 PROTOTYPE: $
3044 CODE:
3045 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3046 OUTPUT:
3047 RETVAL
3048
3049UV
3050rss (Coro::State coro)
3051 PROTOTYPE: $
3052 ALIAS:
3053 usecount = 1
3054 CODE:
3055 switch (ix)
3056 {
3057 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3058 case 1: RETVAL = coro->usecount; break;
3059 }
3060 OUTPUT:
3061 RETVAL
3062
3063void
3064force_cctx ()
3065 PROTOTYPE:
3066 CODE:
3067 SvSTATE_current->cctx->idle_sp = 0;
3068
3069void
3070swap_defsv (Coro::State self)
3071 PROTOTYPE: $
3072 ALIAS:
3073 swap_defav = 1
3074 CODE:
3075 if (!self->slot)
3076 croak ("cannot swap state with coroutine that has no saved state,");
3077 else
3078 {
3079 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3080 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3081
3082 SV *tmp = *src; *src = *dst; *dst = tmp;
3083 }
3084
3085
1189MODULE = Coro::State PACKAGE = Coro 3086MODULE = Coro::State PACKAGE = Coro
1190 3087
1191BOOT: 3088BOOT:
1192{ 3089{
1193 int i; 3090 int i;
1194 3091
3092 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3093 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3094 cv_coro_run = get_cv ( "Coro::_terminate", GV_ADD);
3095 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3096 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3097 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3098 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3099 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3100
3101 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3102 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3103 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3104 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3105
1195 coro_stash = gv_stashpv ("Coro", TRUE); 3106 coro_stash = gv_stashpv ("Coro", TRUE);
1196 3107
1197 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3108 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1198 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3109 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1199 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3110 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1200 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3111 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1201 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3112 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1202 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3113 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1203 3114
1204 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1205 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1206
1207 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 3115 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1208 coro_ready[i] = newAV (); 3116 coro_ready[i] = newAV ();
1209 3117
1210 { 3118 {
1211 SV *sv = perl_get_sv("Coro::API", 1); 3119 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1212 3120
1213 coroapi.schedule = api_schedule; 3121 coroapi.schedule = api_schedule;
3122 coroapi.schedule_to = api_schedule_to;
1214 coroapi.cede = api_cede; 3123 coroapi.cede = api_cede;
3124 coroapi.cede_notself = api_cede_notself;
1215 coroapi.ready = api_ready; 3125 coroapi.ready = api_ready;
3126 coroapi.is_ready = api_is_ready;
1216 coroapi.nready = &coro_nready; 3127 coroapi.nready = coro_nready;
1217 coroapi.current = coro_current; 3128 coroapi.current = coro_current;
1218 3129
1219 GCoroAPI = &coroapi; 3130 /*GCoroAPI = &coroapi;*/
1220 sv_setiv (sv, (IV)&coroapi); 3131 sv_setiv (sv, (IV)&coroapi);
1221 SvREADONLY_on (sv); 3132 SvREADONLY_on (sv);
1222 } 3133 }
1223} 3134}
1224 3135
3136void
3137terminate (...)
3138 CODE:
3139 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3140
3141void
3142schedule (...)
3143 CODE:
3144 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3145
3146void
3147schedule_to (...)
3148 CODE:
3149 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3150
3151void
3152cede_to (...)
3153 CODE:
3154 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3155
3156void
3157cede (...)
3158 CODE:
3159 CORO_EXECUTE_SLF_XS (slf_init_cede);
3160
3161void
3162cede_notself (...)
3163 CODE:
3164 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3165
3166void
3167_cancel (Coro::State self)
3168 CODE:
3169 coro_state_destroy (aTHX_ self);
3170 coro_call_on_destroy (aTHX_ self);
3171
3172void
3173_set_current (SV *current)
3174 PROTOTYPE: $
3175 CODE:
3176 SvREFCNT_dec (SvRV (coro_current));
3177 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3178
3179void
3180_set_readyhook (SV *hook)
3181 PROTOTYPE: $
3182 CODE:
3183 SvREFCNT_dec (coro_readyhook);
3184 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3185
1225int 3186int
1226prio (Coro::State coro, int newprio = 0) 3187prio (Coro::State coro, int newprio = 0)
3188 PROTOTYPE: $;$
1227 ALIAS: 3189 ALIAS:
1228 nice = 1 3190 nice = 1
1229 CODE: 3191 CODE:
1230{ 3192{
1231 RETVAL = coro->prio; 3193 RETVAL = coro->prio;
1232 3194
1233 if (items > 1) 3195 if (items > 1)
1234 { 3196 {
1235 if (ix) 3197 if (ix)
1236 newprio += coro->prio; 3198 newprio = coro->prio - newprio;
1237 3199
1238 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3200 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1239 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3201 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1240 3202
1241 coro->prio = newprio; 3203 coro->prio = newprio;
1242 } 3204 }
1243} 3205}
3206 OUTPUT:
3207 RETVAL
1244 3208
1245void 3209SV *
1246ready (SV *self) 3210ready (SV *self)
1247 PROTOTYPE: $ 3211 PROTOTYPE: $
1248 CODE: 3212 CODE:
1249 api_ready (self); 3213 RETVAL = boolSV (api_ready (aTHX_ self));
3214 OUTPUT:
3215 RETVAL
1250 3216
1251int 3217int
1252nready (...) 3218nready (...)
1253 PROTOTYPE: 3219 PROTOTYPE:
1254 CODE: 3220 CODE:
1255 RETVAL = coro_nready; 3221 RETVAL = coro_nready;
1256 OUTPUT: 3222 OUTPUT:
1257 RETVAL 3223 RETVAL
1258 3224
1259MODULE = Coro::State PACKAGE = Coro::AIO 3225void
3226_pool_handler (...)
3227 CODE:
3228 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3229
3230void
3231async_pool (SV *cv, ...)
3232 PROTOTYPE: &@
3233 PPCODE:
3234{
3235 HV *hv = (HV *)av_pop (av_async_pool);
3236 AV *av = newAV ();
3237 SV *cb = ST (0);
3238 int i;
3239
3240 av_extend (av, items - 2);
3241 for (i = 1; i < items; ++i)
3242 av_push (av, SvREFCNT_inc_NN (ST (i)));
3243
3244 if ((SV *)hv == &PL_sv_undef)
3245 {
3246 PUSHMARK (SP);
3247 EXTEND (SP, 2);
3248 PUSHs (sv_Coro);
3249 PUSHs ((SV *)cv_pool_handler);
3250 PUTBACK;
3251 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3252 SPAGAIN;
3253
3254 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3255 }
3256
3257 {
3258 struct coro *coro = SvSTATE_hv (hv);
3259
3260 assert (!coro->invoke_cb);
3261 assert (!coro->invoke_av);
3262 coro->invoke_cb = SvREFCNT_inc (cb);
3263 coro->invoke_av = av;
3264 }
3265
3266 api_ready (aTHX_ (SV *)hv);
3267
3268 if (GIMME_V != G_VOID)
3269 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3270 else
3271 SvREFCNT_dec (hv);
3272}
1260 3273
1261SV * 3274SV *
1262_get_state () 3275rouse_cb ()
3276 PROTOTYPE:
1263 CODE: 3277 CODE:
1264{ 3278 RETVAL = coro_new_rouse_cb (aTHX);
1265 struct {
1266 int errorno;
1267 int laststype;
1268 int laststatval;
1269 Stat_t statcache;
1270 } data;
1271
1272 data.errorno = errno;
1273 data.laststype = PL_laststype;
1274 data.laststatval = PL_laststatval;
1275 data.statcache = PL_statcache;
1276
1277 RETVAL = newSVpvn ((char *)&data, sizeof data);
1278}
1279 OUTPUT: 3279 OUTPUT:
1280 RETVAL 3280 RETVAL
1281 3281
1282void 3282void
1283_set_state (char *data_) 3283rouse_wait (...)
1284 PROTOTYPE: $ 3284 PROTOTYPE: ;$
3285 PPCODE:
3286 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3287
3288
3289MODULE = Coro::State PACKAGE = PerlIO::cede
3290
3291BOOT:
3292 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3293
3294
3295MODULE = Coro::State PACKAGE = Coro::Semaphore
3296
3297SV *
3298new (SV *klass, SV *count = 0)
1285 CODE: 3299 CODE:
3300 RETVAL = sv_bless (
3301 coro_waitarray_new (aTHX_ count && SvOK (count) ? SvIV (count) : 1),
3302 GvSTASH (CvGV (cv))
3303 );
3304 OUTPUT:
3305 RETVAL
3306
3307# helper for Coro::Channel
3308SV *
3309_alloc (int count)
3310 CODE:
3311 RETVAL = coro_waitarray_new (aTHX_ count);
3312 OUTPUT:
3313 RETVAL
3314
3315SV *
3316count (SV *self)
3317 CODE:
3318 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3319 OUTPUT:
3320 RETVAL
3321
3322void
3323up (SV *self, int adjust = 1)
3324 ALIAS:
3325 adjust = 1
3326 CODE:
3327 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3328
3329void
3330down (...)
3331 CODE:
3332 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3333
3334void
3335wait (...)
3336 CODE:
3337 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3338
3339void
3340try (SV *self)
3341 PPCODE:
1286{ 3342{
1287 struct { 3343 AV *av = (AV *)SvRV (self);
3344 SV *count_sv = AvARRAY (av)[0];
3345 IV count = SvIVX (count_sv);
3346
3347 if (count > 0)
3348 {
3349 --count;
3350 SvIVX (count_sv) = count;
3351 XSRETURN_YES;
3352 }
3353 else
3354 XSRETURN_NO;
3355}
3356
3357void
3358waiters (SV *self)
3359 PPCODE:
3360{
3361 AV *av = (AV *)SvRV (self);
3362 int wcount = AvFILLp (av) + 1 - 1;
3363
3364 if (GIMME_V == G_SCALAR)
3365 XPUSHs (sv_2mortal (newSViv (wcount)));
3366 else
3367 {
1288 int errorno; 3368 int i;
1289 int laststype; 3369 EXTEND (SP, wcount);
1290 int laststatval; 3370 for (i = 1; i <= wcount; ++i)
1291 Stat_t statcache; 3371 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1292 } *data = (void *)data_; 3372 }
1293
1294 errno = data->errorno;
1295 PL_laststype = data->laststype;
1296 PL_laststatval = data->laststatval;
1297 PL_statcache = data->statcache;
1298} 3373}
3374
3375MODULE = Coro::State PACKAGE = Coro::Signal
3376
3377SV *
3378new (SV *klass)
3379 CODE:
3380 RETVAL = sv_bless (
3381 coro_waitarray_new (aTHX_ 0),
3382 GvSTASH (CvGV (cv))
3383 );
3384 OUTPUT:
3385 RETVAL
3386
3387void
3388wait (...)
3389 CODE:
3390 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3391
3392void
3393broadcast (SV *self)
3394 CODE:
3395{
3396 AV *av = (AV *)SvRV (self);
3397 coro_signal_wake (aTHX_ av, AvFILLp (av));
3398}
3399
3400void
3401send (SV *self)
3402 CODE:
3403{
3404 AV *av = (AV *)SvRV (self);
3405
3406 if (AvFILLp (av))
3407 coro_signal_wake (aTHX_ av, 1);
3408 else
3409 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3410}
3411
3412IV
3413awaited (SV *self)
3414 CODE:
3415 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3416 OUTPUT:
3417 RETVAL
3418
3419
3420MODULE = Coro::State PACKAGE = Coro::AnyEvent
3421
3422BOOT:
3423 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3424
3425void
3426_schedule (...)
3427 CODE:
3428{
3429 static int incede;
3430
3431 api_cede_notself (aTHX);
3432
3433 ++incede;
3434 while (coro_nready >= incede && api_cede (aTHX))
3435 ;
3436
3437 sv_setsv (sv_activity, &PL_sv_undef);
3438 if (coro_nready >= incede)
3439 {
3440 PUSHMARK (SP);
3441 PUTBACK;
3442 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3443 }
3444
3445 --incede;
3446}
3447
3448
3449MODULE = Coro::State PACKAGE = Coro::AIO
3450
3451void
3452_register (char *target, char *proto, SV *req)
3453 CODE:
3454{
3455 CV *req_cv = coro_sv_2cv (aTHX_ req);
3456 /* newXSproto doesn't return the CV on 5.8 */
3457 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3458 sv_setpv ((SV *)slf_cv, proto);
3459 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3460}
3461

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