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Comparing Coro/Coro/State.xs (file contents):
Revision 1.95 by root, Sun Nov 26 17:35:42 2006 UTC vs.
Revision 1.358 by root, Mon Jun 29 04:30:25 2009 UTC

1#include "libcoro/coro.c"
2
1#define PERL_NO_GET_CONTEXT 3#define PERL_NO_GET_CONTEXT
2 4#define PERL_EXT
3#include "libcoro/coro.c"
4 5
5#include "EXTERN.h" 6#include "EXTERN.h"
6#include "perl.h" 7#include "perl.h"
7#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
8 10
9#include "patchlevel.h" 11#include "patchlevel.h"
10 12
11#if PERL_VERSION < 6 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
25
26#ifdef HAVE_MMAP
27# include <unistd.h>
28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
48
49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
52
53/* the maximum number of idle cctx that will be pooled */
54static int cctx_max_idle = 4;
55
56#define PERL_VERSION_ATLEAST(a,b,c) \
57 (PERL_REVISION > (a) \
58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 63# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 64# define PL_ppaddr ppaddr
14# endif 65# endif
15# ifndef call_sv 66# ifndef call_sv
16# define call_sv perl_call_sv 67# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 78# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 79# define IS_PADCONST(v) 0
29# endif 80# endif
30#endif 81#endif
31 82
32#include <stdio.h> 83/* 5.11 */
33#include <errno.h> 84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#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
34 114
35#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36# undef STACKGUARD 116# undef CORO_STACKGUARD
37#endif 117#endif
38 118
39#ifndef STACKGUARD 119#ifndef CORO_STACKGUARD
40# define STACKGUARD 0 120# define CORO_STACKGUARD 0
41#endif
42
43#ifdef HAVE_MMAP
44# include <unistd.h>
45# include <sys/mman.h>
46# ifndef MAP_ANONYMOUS
47# ifdef MAP_ANON
48# define MAP_ANONYMOUS MAP_ANON
49# else
50# undef HAVE_MMAP
51# endif 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
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
135# define STACKLEVEL ((void *)&stacklevel)
136#endif
137
138#define IN_DESTRUCT PL_dirty
139
140#if __GNUC__ >= 3
141# define attribute(x) __attribute__(x)
142# define expect(expr,value) __builtin_expect ((expr), (value))
143# define INLINE static inline
144#else
145# define attribute(x)
146# define expect(expr,value) (expr)
147# define INLINE static
148#endif
149
150#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1)
152
153#define NOINLINE attribute ((noinline))
154
155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
52# endif 161# endif
53# include <limits.h> 162#endif
54# ifndef PAGESIZE 163
55# define PAGESIZE pagesize 164#ifdef __linux
56# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 165# include <time.h> /* for timespec */
57static long pagesize; 166# include <syscall.h> /* for SYS_* */
58# else 167# ifdef SYS_clock_gettime
59# define BOOT_PAGESIZE 168# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
169# define CORO_CLOCK_MONOTONIC 1
170# define CORO_CLOCK_THREAD_CPUTIME_ID 3
60# endif 171# endif
61#endif 172#endif
62 173
63/* The next macro should declare a variable stacklevel that contains and approximation 174static double (*nvtime)(); /* so why doesn't it take void? */
64 * to the current C stack pointer. Its property is that it changes with each call
65 * and should be unique. */
66#define dSTACKLEVEL int stacklevel
67#define STACKLEVEL ((void *)&stacklevel)
68 175
69#define IN_DESTRUCT (PL_main_cv == Nullcv) 176/* we hijack an hopefully unused CV flag for our purposes */
177#define CVf_SLF 0x4000
178static OP *pp_slf (pTHX);
70 179
71#include "CoroAPI.h" 180static U32 cctx_gen;
72 181static size_t cctx_stacksize = CORO_STACKSIZE;
73#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74
75#ifdef USE_ITHREADS
76static perl_mutex coro_mutex;
77# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79#else
80# define LOCK (void)0
81# define UNLOCK (void)0
82#endif
83
84static struct CoroAPI coroapi; 182static struct CoroAPI coroapi;
85static AV *main_mainstack; /* used to differentiate between $main and others */ 183static AV *main_mainstack; /* used to differentiate between $main and others */
184static JMPENV *main_top_env;
86static HV *coro_state_stash, *coro_stash; 185static HV *coro_state_stash, *coro_stash;
87static SV *coro_mortal; /* will be freed after next transfer */ 186static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
187
188static AV *av_destroy; /* destruction queue */
189static SV *sv_manager; /* the manager coro */
190static SV *sv_idle; /* $Coro::idle */
191
192static GV *irsgv; /* $/ */
193static GV *stdoutgv; /* *STDOUT */
194static SV *rv_diehook;
195static SV *rv_warnhook;
196static HV *hv_sig; /* %SIG */
197
198/* async_pool helper stuff */
199static SV *sv_pool_rss;
200static SV *sv_pool_size;
201static SV *sv_async_pool_idle; /* description string */
202static AV *av_async_pool; /* idle pool */
203static SV *sv_Coro; /* class string */
204static CV *cv_pool_handler;
205static CV *cv_coro_state_new;
206
207/* Coro::AnyEvent */
208static SV *sv_activity;
209
210static struct coro_cctx *cctx_first;
211static int cctx_count, cctx_idle;
212
213enum {
214 CC_MAPPED = 0x01,
215 CC_NOREUSE = 0x02, /* throw this away after tracing */
216 CC_TRACE = 0x04,
217 CC_TRACE_SUB = 0x08, /* trace sub calls */
218 CC_TRACE_LINE = 0x10, /* trace each statement */
219 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
220};
88 221
89/* this is a structure representing a c-level coroutine */ 222/* this is a structure representing a c-level coroutine */
90typedef struct coro_stack { 223typedef struct coro_cctx
224{
91 struct coro_stack *next; 225 struct coro_cctx *next;
92 226
93 /* the stack */ 227 /* the stack */
94 void *sptr; 228 void *sptr;
95 long ssize; /* positive == mmap, otherwise malloc */ 229 size_t ssize;
96 230
97 /* cpu state */ 231 /* cpu state */
98 void *idle_sp; /* original stacklevel when coroutine was created */ 232 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
233 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99 JMPENV *top_env; 234 JMPENV *top_env;
100 coro_context cctx; 235 coro_context cctx;
101} coro_stack; 236
237 U32 gen;
238#if CORO_USE_VALGRIND
239 int valgrind_id;
240#endif
241 unsigned char flags;
242} coro_cctx;
243
244coro_cctx *cctx_current; /* the currently running cctx */
245
246/*****************************************************************************/
247
248enum {
249 CF_RUNNING = 0x0001, /* coroutine is running */
250 CF_READY = 0x0002, /* coroutine is ready */
251 CF_NEW = 0x0004, /* has never been switched to */
252 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
253 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
254};
255
256/* the structure where most of the perl state is stored, overlaid on the cxstack */
257typedef struct
258{
259 SV *defsv;
260 AV *defav;
261 SV *errsv;
262 SV *irsgv;
263 HV *hinthv;
264#define VAR(name,type) type name;
265# include "state.h"
266#undef VAR
267} perl_slots;
268
269#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
102 270
103/* this is a structure representing a perl-level coroutine */ 271/* this is a structure representing a perl-level coroutine */
104struct coro { 272struct coro {
105 /* the c coroutine allocated to this perl coroutine, if any */ 273 /* the C coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 274 coro_cctx *cctx;
107 275
108 /* data associated with this coroutine (initial args) */ 276 /* ready queue */
109 AV *args; 277 struct coro *next_ready;
110 int refcnt;
111 278
112 /* optionally saved, might be zero */ 279 /* state data */
113 AV *defav; 280 struct CoroSLF slf_frame; /* saved slf frame */
114 SV *defsv;
115 SV *errsv;
116
117 /* saved global state not related to stacks */
118 U8 dowarn;
119 I32 in_eval;
120
121 /* the stacks and related info (callchain etc..) */
122 PERL_SI *curstackinfo;
123 AV *curstack;
124 AV *mainstack; 281 AV *mainstack;
125 SV **stack_sp; 282 perl_slots *slot; /* basically the saved sp */
126 OP *op; 283
127 SV **curpad; 284 CV *startcv; /* the CV to execute */
128 AV *comppad; 285 AV *args; /* data associated with this coroutine (initial args) */
129 CV *compcv; 286 int refcnt; /* coroutines are refcounted, yes */
130 SV **stack_base; 287 int flags; /* CF_ flags */
131 SV **stack_max; 288 HV *hv; /* the perl hash associated with this coro, if any */
132 SV **tmps_stack; 289 void (*on_destroy)(pTHX_ struct coro *coro);
133 I32 tmps_floor; 290
134 I32 tmps_ix; 291 /* statistics */
135 I32 tmps_max; 292 int usecount; /* number of transfers to this coro */
136 I32 *markstack;
137 I32 *markstack_ptr;
138 I32 *markstack_max;
139 I32 *scopestack;
140 I32 scopestack_ix;
141 I32 scopestack_max;
142 ANY *savestack;
143 I32 savestack_ix;
144 I32 savestack_max;
145 OP **retstack;
146 I32 retstack_ix;
147 I32 retstack_max;
148 PMOP *curpm;
149 COP *curcop;
150 293
151 /* coro process data */ 294 /* coro process data */
152 int prio; 295 int prio;
296 SV *except; /* exception to be thrown */
297 SV *rouse_cb;
298
299 /* async_pool */
300 SV *saved_deffh;
301 SV *invoke_cb;
302 AV *invoke_av;
303
304 /* on_enter/on_leave */
305 AV *on_enter;
306 AV *on_leave;
307
308 /* linked list */
309 struct coro *next, *prev;
153}; 310};
154 311
155typedef struct coro *Coro__State; 312typedef struct coro *Coro__State;
156typedef struct coro *Coro__State_or_hashref; 313typedef struct coro *Coro__State_or_hashref;
157 314
315/* the following variables are effectively part of the perl context */
316/* and get copied between struct coro and these variables */
317/* the mainr easonw e don't support windows process emulation */
318static struct CoroSLF slf_frame; /* the current slf frame */
319
320/** Coro ********************************************************************/
321
322#define CORO_PRIO_MAX 3
323#define CORO_PRIO_HIGH 1
324#define CORO_PRIO_NORMAL 0
325#define CORO_PRIO_LOW -1
326#define CORO_PRIO_IDLE -3
327#define CORO_PRIO_MIN -4
328
329/* for Coro.pm */
330static SV *coro_current;
331static SV *coro_readyhook;
332static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
333static CV *cv_coro_run, *cv_coro_terminate;
334static struct coro *coro_first;
335#define coro_nready coroapi.nready
336
337/** lowlevel stuff **********************************************************/
338
339static SV *
340coro_get_sv (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_sv (name, create);
345#endif
346 return get_sv (name, create);
347}
348
158static AV * 349static AV *
350coro_get_av (pTHX_ const char *name, int create)
351{
352#if PERL_VERSION_ATLEAST (5,10,0)
353 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
354 get_av (name, create);
355#endif
356 return get_av (name, create);
357}
358
359static HV *
360coro_get_hv (pTHX_ const char *name, int create)
361{
362#if PERL_VERSION_ATLEAST (5,10,0)
363 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
364 get_hv (name, create);
365#endif
366 return get_hv (name, create);
367}
368
369/* may croak */
370INLINE CV *
371coro_sv_2cv (pTHX_ SV *sv)
372{
373 HV *st;
374 GV *gvp;
375 CV *cv = sv_2cv (sv, &st, &gvp, 0);
376
377 if (!cv)
378 croak ("code reference expected");
379
380 return cv;
381}
382
383/*****************************************************************************/
384/* magic glue */
385
386#define CORO_MAGIC_type_cv 26
387#define CORO_MAGIC_type_state PERL_MAGIC_ext
388
389#define CORO_MAGIC_NN(sv, type) \
390 (expect_true (SvMAGIC (sv)->mg_type == type) \
391 ? SvMAGIC (sv) \
392 : mg_find (sv, type))
393
394#define CORO_MAGIC(sv, type) \
395 (expect_true (SvMAGIC (sv)) \
396 ? CORO_MAGIC_NN (sv, type) \
397 : 0)
398
399#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
400#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
401
402INLINE struct coro *
403SvSTATE_ (pTHX_ SV *coro)
404{
405 HV *stash;
406 MAGIC *mg;
407
408 if (SvROK (coro))
409 coro = SvRV (coro);
410
411 if (expect_false (SvTYPE (coro) != SVt_PVHV))
412 croak ("Coro::State object required");
413
414 stash = SvSTASH (coro);
415 if (expect_false (stash != coro_stash && stash != coro_state_stash))
416 {
417 /* very slow, but rare, check */
418 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
419 croak ("Coro::State object required");
420 }
421
422 mg = CORO_MAGIC_state (coro);
423 return (struct coro *)mg->mg_ptr;
424}
425
426#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
427
428/* faster than SvSTATE, but expects a coroutine hv */
429#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
430#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
431
432/*****************************************************************************/
433/* padlist management and caching */
434
435static AV *
159coro_clone_padlist (pTHX_ CV *cv) 436coro_derive_padlist (pTHX_ CV *cv)
160{ 437{
161 AV *padlist = CvPADLIST (cv); 438 AV *padlist = CvPADLIST (cv);
162 AV *newpadlist, *newpad; 439 AV *newpadlist, *newpad;
163 440
164 newpadlist = newAV (); 441 newpadlist = newAV ();
165 AvREAL_off (newpadlist); 442 AvREAL_off (newpadlist);
166#if PERL_VERSION < 9 443#if PERL_VERSION_ATLEAST (5,10,0)
444 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
445#else
167 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 446 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168#else
169 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170#endif 447#endif
171 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 448 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172 --AvFILLp (padlist); 449 --AvFILLp (padlist);
173 450
174 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 451 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
175 av_store (newpadlist, 1, (SV *)newpad); 452 av_store (newpadlist, 1, (SV *)newpad);
176 453
177 return newpadlist; 454 return newpadlist;
178} 455}
179 456
180static void 457static void
181free_padlist (pTHX_ AV *padlist) 458free_padlist (pTHX_ AV *padlist)
182{ 459{
183 /* may be during global destruction */ 460 /* may be during global destruction */
184 if (SvREFCNT (padlist)) 461 if (!IN_DESTRUCT)
185 { 462 {
186 I32 i = AvFILLp (padlist); 463 I32 i = AvFILLp (padlist);
187 while (i >= 0) 464
465 while (i > 0) /* special-case index 0 */
188 { 466 {
189 SV **svp = av_fetch (padlist, i--, FALSE); 467 /* we try to be extra-careful here */
190 if (svp) 468 AV *av = (AV *)AvARRAY (padlist)[i--];
191 { 469 I32 j = AvFILLp (av);
192 SV *sv; 470
193 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 471 while (j >= 0)
472 SvREFCNT_dec (AvARRAY (av)[j--]);
473
474 AvFILLp (av) = -1;
194 SvREFCNT_dec (sv); 475 SvREFCNT_dec (av);
195
196 SvREFCNT_dec (*svp);
197 }
198 } 476 }
199 477
478 SvREFCNT_dec (AvARRAY (padlist)[0]);
479
480 AvFILLp (padlist) = -1;
200 SvREFCNT_dec ((SV*)padlist); 481 SvREFCNT_dec ((SV*)padlist);
201 } 482 }
202} 483}
203 484
204static int 485static int
205coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 486coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
206{ 487{
207 AV *padlist; 488 AV *padlist;
208 AV *av = (AV *)mg->mg_obj; 489 AV *av = (AV *)mg->mg_obj;
490
491 /* perl manages to free our internal AV and _then_ call us */
492 if (IN_DESTRUCT)
493 return;
209 494
210 /* casting is fun. */ 495 /* casting is fun. */
211 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 496 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212 free_padlist (aTHX_ padlist); 497 free_padlist (aTHX_ padlist);
213 498
214 SvREFCNT_dec (av); 499 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
215 500
216 return 0; 501 return 0;
217} 502}
218 503
219#define PERL_MAGIC_coro PERL_MAGIC_ext 504static MGVTBL coro_cv_vtbl = {
220 505 0, 0, 0, 0,
221static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 506 coro_cv_free
507};
222 508
223/* the next two functions merely cache the padlists */ 509/* the next two functions merely cache the padlists */
224static void 510static void
225get_padlist (pTHX_ CV *cv) 511get_padlist (pTHX_ CV *cv)
226{ 512{
227 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 513 MAGIC *mg = CORO_MAGIC_cv (cv);
514 AV *av;
228 515
229 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 516 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 517 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231 else 518 else
232 { 519 {
233#if 0 520#if CORO_PREFER_PERL_FUNCTIONS
234 /* this should work - but it doesn't :( */ 521 /* this is probably cleaner? but also slower! */
522 /* in practise, it seems to be less stable */
235 CV *cp = Perl_cv_clone (aTHX_ cv); 523 CV *cp = Perl_cv_clone (aTHX_ cv);
236 CvPADLIST (cv) = CvPADLIST (cp); 524 CvPADLIST (cv) = CvPADLIST (cp);
237 CvPADLIST (cp) = 0; 525 CvPADLIST (cp) = 0;
238 SvREFCNT_dec (cp); 526 SvREFCNT_dec (cp);
239#else 527#else
240 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 528 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
241#endif 529#endif
242 } 530 }
243} 531}
244 532
245static void 533static void
246put_padlist (pTHX_ CV *cv) 534put_padlist (pTHX_ CV *cv)
247{ 535{
248 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 536 MAGIC *mg = CORO_MAGIC_cv (cv);
537 AV *av;
249 538
250 if (!mg) 539 if (expect_false (!mg))
251 { 540 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254 mg->mg_virtual = &vtbl_coro;
255 mg->mg_obj = (SV *)newAV ();
256 }
257 541
258 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 542 av = (AV *)mg->mg_obj;
259}
260 543
261#define SB do { 544 if (expect_false (AvFILLp (av) >= AvMAX (av)))
262#define SE } while (0) 545 av_extend (av, AvFILLp (av) + 1);
263 546
264#define LOAD(state) load_state(aTHX_ (state)); 547 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 548}
266 549
267#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 550/** load & save, init *******************************************************/
268 551
269static void 552static void
553on_enterleave_call (pTHX_ SV *cb);
554
555static void
270load_state(pTHX_ Coro__State c) 556load_perl (pTHX_ Coro__State c)
271{ 557{
272 PL_dowarn = c->dowarn; 558 perl_slots *slot = c->slot;
273 PL_in_eval = c->in_eval; 559 c->slot = 0;
274 560
275 PL_curstackinfo = c->curstackinfo;
276 PL_curstack = c->curstack;
277 PL_mainstack = c->mainstack; 561 PL_mainstack = c->mainstack;
278 PL_stack_sp = c->stack_sp;
279 PL_op = c->op;
280 PL_curpad = c->curpad;
281 PL_comppad = c->comppad;
282 PL_compcv = c->compcv;
283 PL_stack_base = c->stack_base;
284 PL_stack_max = c->stack_max;
285 PL_tmps_stack = c->tmps_stack;
286 PL_tmps_floor = c->tmps_floor;
287 PL_tmps_ix = c->tmps_ix;
288 PL_tmps_max = c->tmps_max;
289 PL_markstack = c->markstack;
290 PL_markstack_ptr = c->markstack_ptr;
291 PL_markstack_max = c->markstack_max;
292 PL_scopestack = c->scopestack;
293 PL_scopestack_ix = c->scopestack_ix;
294 PL_scopestack_max = c->scopestack_max;
295 PL_savestack = c->savestack;
296 PL_savestack_ix = c->savestack_ix;
297 PL_savestack_max = c->savestack_max;
298#if PERL_VERSION < 9
299 PL_retstack = c->retstack;
300 PL_retstack_ix = c->retstack_ix;
301 PL_retstack_max = c->retstack_max;
302#endif
303 PL_curpm = c->curpm;
304 PL_curcop = c->curcop;
305 562
306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 563 GvSV (PL_defgv) = slot->defsv;
307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 564 GvAV (PL_defgv) = slot->defav;
308 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 565 GvSV (PL_errgv) = slot->errsv;
566 GvSV (irsgv) = slot->irsgv;
567 GvHV (PL_hintgv) = slot->hinthv;
568
569 #define VAR(name,type) PL_ ## name = slot->name;
570 # include "state.h"
571 #undef VAR
309 572
310 { 573 {
311 dSP; 574 dSP;
575
312 CV *cv; 576 CV *cv;
313 577
314 /* now do the ugly restore mess */ 578 /* now do the ugly restore mess */
315 while ((cv = (CV *)POPs)) 579 while (expect_true (cv = (CV *)POPs))
316 { 580 {
317 AV *padlist = (AV *)POPs;
318
319 if (padlist)
320 {
321 put_padlist (aTHX_ cv); /* mark this padlist as available */ 581 put_padlist (aTHX_ cv); /* mark this padlist as available */
322 CvPADLIST(cv) = padlist; 582 CvDEPTH (cv) = PTR2IV (POPs);
323 } 583 CvPADLIST (cv) = (AV *)POPs;
324
325 ++CvDEPTH(cv);
326 } 584 }
327 585
328 PUTBACK; 586 PUTBACK;
329 } 587 }
330}
331 588
589 slf_frame = c->slf_frame;
590 CORO_THROW = c->except;
591
592 if (expect_false (c->on_enter))
593 {
594 int i;
595
596 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
597 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
598 }
599}
600
332static void 601static void
333save_state(pTHX_ Coro__State c, int flags) 602save_perl (pTHX_ Coro__State c)
334{ 603{
604 if (expect_false (c->on_leave))
605 {
606 int i;
607
608 for (i = AvFILLp (c->on_leave); i >= 0; --i)
609 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
610 }
611
612 c->except = CORO_THROW;
613 c->slf_frame = slf_frame;
614
335 { 615 {
336 dSP; 616 dSP;
337 I32 cxix = cxstack_ix; 617 I32 cxix = cxstack_ix;
338 PERL_CONTEXT *ccstk = cxstack; 618 PERL_CONTEXT *ccstk = cxstack;
339 PERL_SI *top_si = PL_curstackinfo; 619 PERL_SI *top_si = PL_curstackinfo;
… …
341 /* 621 /*
342 * the worst thing you can imagine happens first - we have to save 622 * the worst thing you can imagine happens first - we have to save
343 * (and reinitialize) all cv's in the whole callchain :( 623 * (and reinitialize) all cv's in the whole callchain :(
344 */ 624 */
345 625
346 PUSHs (Nullsv); 626 XPUSHs (Nullsv);
347 /* this loop was inspired by pp_caller */ 627 /* this loop was inspired by pp_caller */
348 for (;;) 628 for (;;)
349 { 629 {
350 while (cxix >= 0) 630 while (expect_true (cxix >= 0))
351 { 631 {
352 PERL_CONTEXT *cx = &ccstk[cxix--]; 632 PERL_CONTEXT *cx = &ccstk[cxix--];
353 633
354 if (CxTYPE(cx) == CXt_SUB) 634 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
355 { 635 {
356 CV *cv = cx->blk_sub.cv; 636 CV *cv = cx->blk_sub.cv;
637
357 if (CvDEPTH(cv)) 638 if (expect_true (CvDEPTH (cv)))
358 { 639 {
359 EXTEND (SP, CvDEPTH(cv)*2); 640 EXTEND (SP, 3);
360
361 while (--CvDEPTH(cv))
362 {
363 /* this tells the restore code to increment CvDEPTH */
364 PUSHs (Nullsv);
365 PUSHs ((SV *)cv);
366 }
367
368 PUSHs ((SV *)CvPADLIST(cv)); 641 PUSHs ((SV *)CvPADLIST (cv));
642 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
369 PUSHs ((SV *)cv); 643 PUSHs ((SV *)cv);
370 644
645 CvDEPTH (cv) = 0;
371 get_padlist (aTHX_ cv); 646 get_padlist (aTHX_ cv);
372 } 647 }
373 } 648 }
374#ifdef CXt_FORMAT
375 else if (CxTYPE(cx) == CXt_FORMAT)
376 {
377 /* I never used formats, so how should I know how these are implemented? */
378 /* my bold guess is as a simple, plain sub... */
379 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380 }
381#endif
382 } 649 }
383 650
384 if (top_si->si_type == PERLSI_MAIN) 651 if (expect_true (top_si->si_type == PERLSI_MAIN))
385 break; 652 break;
386 653
387 top_si = top_si->si_prev; 654 top_si = top_si->si_prev;
388 ccstk = top_si->si_cxstack; 655 ccstk = top_si->si_cxstack;
389 cxix = top_si->si_cxix; 656 cxix = top_si->si_cxix;
390 } 657 }
391 658
392 PUTBACK; 659 PUTBACK;
393 } 660 }
394 661
395 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 662 /* allocate some space on the context stack for our purposes */
396 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 663 /* we manually unroll here, as usually 2 slots is enough */
397 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 664 if (SLOT_COUNT >= 1) CXINC;
665 if (SLOT_COUNT >= 2) CXINC;
666 if (SLOT_COUNT >= 3) CXINC;
667 {
668 int i;
669 for (i = 3; i < SLOT_COUNT; ++i)
670 CXINC;
671 }
672 cxstack_ix -= SLOT_COUNT; /* undo allocation */
398 673
399 c->dowarn = PL_dowarn;
400 c->in_eval = PL_in_eval;
401
402 c->curstackinfo = PL_curstackinfo;
403 c->curstack = PL_curstack;
404 c->mainstack = PL_mainstack; 674 c->mainstack = PL_mainstack;
405 c->stack_sp = PL_stack_sp; 675
406 c->op = PL_op; 676 {
407 c->curpad = PL_curpad; 677 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
408 c->comppad = PL_comppad; 678
409 c->compcv = PL_compcv; 679 slot->defav = GvAV (PL_defgv);
410 c->stack_base = PL_stack_base; 680 slot->defsv = DEFSV;
411 c->stack_max = PL_stack_max; 681 slot->errsv = ERRSV;
412 c->tmps_stack = PL_tmps_stack; 682 slot->irsgv = GvSV (irsgv);
413 c->tmps_floor = PL_tmps_floor; 683 slot->hinthv = GvHV (PL_hintgv);
414 c->tmps_ix = PL_tmps_ix; 684
415 c->tmps_max = PL_tmps_max; 685 #define VAR(name,type) slot->name = PL_ ## name;
416 c->markstack = PL_markstack; 686 # include "state.h"
417 c->markstack_ptr = PL_markstack_ptr; 687 #undef VAR
418 c->markstack_max = PL_markstack_max; 688 }
419 c->scopestack = PL_scopestack;
420 c->scopestack_ix = PL_scopestack_ix;
421 c->scopestack_max = PL_scopestack_max;
422 c->savestack = PL_savestack;
423 c->savestack_ix = PL_savestack_ix;
424 c->savestack_max = PL_savestack_max;
425#if PERL_VERSION < 9
426 c->retstack = PL_retstack;
427 c->retstack_ix = PL_retstack_ix;
428 c->retstack_max = PL_retstack_max;
429#endif
430 c->curpm = PL_curpm;
431 c->curcop = PL_curcop;
432} 689}
433 690
434/* 691/*
435 * allocate various perl stacks. This is an exact copy 692 * allocate various perl stacks. This is almost an exact copy
436 * of perl.c:init_stacks, except that it uses less memory 693 * of perl.c:init_stacks, except that it uses less memory
437 * on the (sometimes correct) assumption that coroutines do 694 * on the (sometimes correct) assumption that coroutines do
438 * not usually need a lot of stackspace. 695 * not usually need a lot of stackspace.
439 */ 696 */
697#if CORO_PREFER_PERL_FUNCTIONS
698# define coro_init_stacks(thx) init_stacks ()
699#else
440static void 700static void
441coro_init_stacks (pTHX) 701coro_init_stacks (pTHX)
442{ 702{
443 LOCK; 703 PL_curstackinfo = new_stackinfo(32, 8);
444
445 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
446 PL_curstackinfo->si_type = PERLSI_MAIN; 704 PL_curstackinfo->si_type = PERLSI_MAIN;
447 PL_curstack = PL_curstackinfo->si_stack; 705 PL_curstack = PL_curstackinfo->si_stack;
448 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 706 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449 707
450 PL_stack_base = AvARRAY(PL_curstack); 708 PL_stack_base = AvARRAY(PL_curstack);
451 PL_stack_sp = PL_stack_base; 709 PL_stack_sp = PL_stack_base;
452 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 710 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453 711
454 New(50,PL_tmps_stack,96,SV*); 712 New(50,PL_tmps_stack,32,SV*);
455 PL_tmps_floor = -1; 713 PL_tmps_floor = -1;
456 PL_tmps_ix = -1; 714 PL_tmps_ix = -1;
457 PL_tmps_max = 96; 715 PL_tmps_max = 32;
458 716
459 New(54,PL_markstack,16,I32); 717 New(54,PL_markstack,16,I32);
460 PL_markstack_ptr = PL_markstack; 718 PL_markstack_ptr = PL_markstack;
461 PL_markstack_max = PL_markstack + 16; 719 PL_markstack_max = PL_markstack + 16;
462 720
463#ifdef SET_MARK_OFFSET 721#ifdef SET_MARK_OFFSET
464 SET_MARK_OFFSET; 722 SET_MARK_OFFSET;
465#endif 723#endif
466 724
467 New(54,PL_scopestack,16,I32); 725 New(54,PL_scopestack,8,I32);
468 PL_scopestack_ix = 0; 726 PL_scopestack_ix = 0;
469 PL_scopestack_max = 16; 727 PL_scopestack_max = 8;
470 728
471 New(54,PL_savestack,96,ANY); 729 New(54,PL_savestack,24,ANY);
472 PL_savestack_ix = 0; 730 PL_savestack_ix = 0;
473 PL_savestack_max = 96; 731 PL_savestack_max = 24;
474 732
475#if PERL_VERSION < 9 733#if !PERL_VERSION_ATLEAST (5,10,0)
476 New(54,PL_retstack,8,OP*); 734 New(54,PL_retstack,4,OP*);
477 PL_retstack_ix = 0; 735 PL_retstack_ix = 0;
478 PL_retstack_max = 8; 736 PL_retstack_max = 4;
479#endif 737#endif
480
481 UNLOCK;
482} 738}
739#endif
483 740
484/* 741/*
485 * destroy the stacks, the callchain etc... 742 * destroy the stacks, the callchain etc...
486 */ 743 */
487static void 744static void
488destroy_stacks(pTHX) 745coro_destruct_stacks (pTHX)
489{ 746{
490 if (!IN_DESTRUCT)
491 {
492 /* is this ugly, I ask? */
493 LEAVE_SCOPE (0);
494
495 /* sure it is, but more important: is it correct?? :/ */
496 FREETMPS;
497
498 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
499 }
500
501 while (PL_curstackinfo->si_next) 747 while (PL_curstackinfo->si_next)
502 PL_curstackinfo = PL_curstackinfo->si_next; 748 PL_curstackinfo = PL_curstackinfo->si_next;
503 749
504 while (PL_curstackinfo) 750 while (PL_curstackinfo)
505 { 751 {
506 PERL_SI *p = PL_curstackinfo->si_prev; 752 PERL_SI *p = PL_curstackinfo->si_prev;
507 753
508 { /*D*//*remove*/
509 dSP;
510 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511 PUTBACK; /* possibly superfluous */
512 }
513
514 if (!IN_DESTRUCT) 754 if (!IN_DESTRUCT)
515 {
516 dounwind (-1);/*D*//*remove*/
517 SvREFCNT_dec (PL_curstackinfo->si_stack); 755 SvREFCNT_dec (PL_curstackinfo->si_stack);
518 }
519 756
520 Safefree (PL_curstackinfo->si_cxstack); 757 Safefree (PL_curstackinfo->si_cxstack);
521 Safefree (PL_curstackinfo); 758 Safefree (PL_curstackinfo);
522 PL_curstackinfo = p; 759 PL_curstackinfo = p;
523 } 760 }
524 761
525 Safefree (PL_tmps_stack); 762 Safefree (PL_tmps_stack);
526 Safefree (PL_markstack); 763 Safefree (PL_markstack);
527 Safefree (PL_scopestack); 764 Safefree (PL_scopestack);
528 Safefree (PL_savestack); 765 Safefree (PL_savestack);
529#if PERL_VERSION < 9 766#if !PERL_VERSION_ATLEAST (5,10,0)
530 Safefree (PL_retstack); 767 Safefree (PL_retstack);
531#endif 768#endif
532} 769}
533 770
771#define CORO_RSS \
772 rss += sizeof (SYM (curstackinfo)); \
773 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
774 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
775 rss += SYM (tmps_max) * sizeof (SV *); \
776 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
777 rss += SYM (scopestack_max) * sizeof (I32); \
778 rss += SYM (savestack_max) * sizeof (ANY);
779
780static size_t
781coro_rss (pTHX_ struct coro *coro)
782{
783 size_t rss = sizeof (*coro);
784
785 if (coro->mainstack)
786 {
787 if (coro->flags & CF_RUNNING)
788 {
789 #define SYM(sym) PL_ ## sym
790 CORO_RSS;
791 #undef SYM
792 }
793 else
794 {
795 #define SYM(sym) coro->slot->sym
796 CORO_RSS;
797 #undef SYM
798 }
799 }
800
801 return rss;
802}
803
804/** coroutine stack handling ************************************************/
805
806static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
807static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
808static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
809
810/* apparently < 5.8.8 */
811#ifndef MgPV_nolen_const
812#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
813 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
814 (const char*)(mg)->mg_ptr)
815#endif
816
817/*
818 * This overrides the default magic get method of %SIG elements.
819 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
820 * and instead of trying to save and restore the hash elements, we just provide
821 * readback here.
822 */
534static void 823static int
535setup_coro (struct coro *coro) 824coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
825{
826 const char *s = MgPV_nolen_const (mg);
827
828 if (*s == '_')
829 {
830 SV **svp = 0;
831
832 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
833 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
834
835 if (svp)
836 {
837 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
838 return 0;
839 }
840 }
841
842 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
843}
844
845static int
846coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
847{
848 const char *s = MgPV_nolen_const (mg);
849
850 if (*s == '_')
851 {
852 SV **svp = 0;
853
854 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
855 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
856
857 if (svp)
858 {
859 SV *old = *svp;
860 *svp = 0;
861 SvREFCNT_dec (old);
862 return 0;
863 }
864 }
865
866 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
867}
868
869static int
870coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
871{
872 const char *s = MgPV_nolen_const (mg);
873
874 if (*s == '_')
875 {
876 SV **svp = 0;
877
878 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
879 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
880
881 if (svp)
882 {
883 SV *old = *svp;
884 *svp = SvOK (sv) ? newSVsv (sv) : 0;
885 SvREFCNT_dec (old);
886 return 0;
887 }
888 }
889
890 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
891}
892
893static void
894prepare_nop (pTHX_ struct coro_transfer_args *ta)
895{
896 /* kind of mega-hacky, but works */
897 ta->next = ta->prev = (struct coro *)ta;
898}
899
900static int
901slf_check_nop (pTHX_ struct CoroSLF *frame)
902{
903 return 0;
904}
905
906static int
907slf_check_repeat (pTHX_ struct CoroSLF *frame)
908{
909 return 1;
910}
911
912static UNOP coro_setup_op;
913
914static void NOINLINE /* noinline to keep it out of the transfer fast path */
915coro_setup (pTHX_ struct coro *coro)
536{ 916{
537 /* 917 /*
538 * emulate part of the perl startup here. 918 * emulate part of the perl startup here.
539 */ 919 */
540 dTHX;
541 dSP;
542 UNOP myop;
543 SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544
545 coro_init_stacks (aTHX); 920 coro_init_stacks (aTHX);
546 /*PL_curcop = 0;*/ 921
547 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 922 PL_runops = RUNOPS_DEFAULT;
548 SvREFCNT_dec (GvAV (PL_defgv)); 923 PL_curcop = &PL_compiling;
924 PL_in_eval = EVAL_NULL;
925 PL_comppad = 0;
926 PL_comppad_name = 0;
927 PL_comppad_name_fill = 0;
928 PL_comppad_name_floor = 0;
929 PL_curpm = 0;
930 PL_curpad = 0;
931 PL_localizing = 0;
932 PL_dirty = 0;
933 PL_restartop = 0;
934#if PERL_VERSION_ATLEAST (5,10,0)
935 PL_parser = 0;
936#endif
937 PL_hints = 0;
938
939 /* recreate the die/warn hooks */
940 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
941 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
942
943 GvSV (PL_defgv) = newSV (0);
549 GvAV (PL_defgv) = coro->args; coro->args = 0; 944 GvAV (PL_defgv) = coro->args; coro->args = 0;
945 GvSV (PL_errgv) = newSV (0);
946 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
947 GvHV (PL_hintgv) = 0;
948 PL_rs = newSVsv (GvSV (irsgv));
949 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
550 950
551 SPAGAIN; 951 {
952 dSP;
953 UNOP myop;
552 954
553 Zero (&myop, 1, UNOP); 955 Zero (&myop, 1, UNOP);
554 myop.op_next = Nullop; 956 myop.op_next = Nullop;
957 myop.op_type = OP_ENTERSUB;
555 myop.op_flags = OPf_WANT_VOID; 958 myop.op_flags = OPf_WANT_VOID;
556 959
960 PUSHMARK (SP);
961 PUSHs ((SV *)coro->startcv);
962 PUTBACK;
557 PL_op = (OP *)&myop; 963 PL_op = (OP *)&myop;
558
559 PUSHMARK(SP);
560 XPUSHs (sub_init);
561 PUTBACK;
562 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 964 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563 SPAGAIN; 965 }
564 966
565 ENTER; /* necessary e.g. for dounwind */ 967 /* this newly created coroutine might be run on an existing cctx which most
566} 968 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
969 */
970 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
971 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
567 972
973 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
974 coro_setup_op.op_next = PL_op;
975 coro_setup_op.op_type = OP_ENTERSUB;
976 coro_setup_op.op_ppaddr = pp_slf;
977 /* no flags etc. required, as an init function won't be called */
978
979 PL_op = (OP *)&coro_setup_op;
980
981 /* copy throw, in case it was set before coro_setup */
982 CORO_THROW = coro->except;
983}
984
568static void 985static void
986coro_unwind_stacks (pTHX)
987{
988 if (!IN_DESTRUCT)
989 {
990 /* restore all saved variables and stuff */
991 LEAVE_SCOPE (0);
992 assert (PL_tmps_floor == -1);
993
994 /* free all temporaries */
995 FREETMPS;
996 assert (PL_tmps_ix == -1);
997
998 /* unwind all extra stacks */
999 POPSTACK_TO (PL_mainstack);
1000
1001 /* unwind main stack */
1002 dounwind (-1);
1003 }
1004}
1005
1006static void
1007coro_destruct_perl (pTHX_ struct coro *coro)
1008{
1009 SV *svf [9];
1010
1011 {
1012 struct coro *current = SvSTATE_current;
1013
1014 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1015
1016 save_perl (aTHX_ current);
1017 load_perl (aTHX_ coro);
1018
1019 coro_unwind_stacks (aTHX);
1020 coro_destruct_stacks (aTHX);
1021
1022 // now save some sv's to be free'd later
1023 svf [0] = GvSV (PL_defgv);
1024 svf [1] = (SV *)GvAV (PL_defgv);
1025 svf [2] = GvSV (PL_errgv);
1026 svf [3] = (SV *)PL_defoutgv;
1027 svf [4] = PL_rs;
1028 svf [5] = GvSV (irsgv);
1029 svf [6] = (SV *)GvHV (PL_hintgv);
1030 svf [7] = PL_diehook;
1031 svf [8] = PL_warnhook;
1032 assert (9 == sizeof (svf) / sizeof (*svf));
1033
1034 load_perl (aTHX_ current);
1035 }
1036
1037 {
1038 int i;
1039
1040 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1041 SvREFCNT_dec (svf [i]);
1042
1043 SvREFCNT_dec (coro->saved_deffh);
1044 SvREFCNT_dec (coro->rouse_cb);
1045 SvREFCNT_dec (coro->invoke_cb);
1046 SvREFCNT_dec (coro->invoke_av);
1047 }
1048}
1049
1050INLINE void
569free_coro_mortal () 1051free_coro_mortal (pTHX)
570{ 1052{
571 if (coro_mortal) 1053 if (expect_true (coro_mortal))
572 { 1054 {
573 SvREFCNT_dec (coro_mortal); 1055 SvREFCNT_dec (coro_mortal);
574 coro_mortal = 0; 1056 coro_mortal = 0;
575 } 1057 }
576} 1058}
577 1059
578static void 1060static int
579coro_run (void *arg) 1061runops_trace (pTHX)
580{ 1062{
581 /* 1063 COP *oldcop = 0;
582 * this is a _very_ stripped down perl interpreter ;) 1064 int oldcxix = -2;
583 */
584 dTHX;
585 int ret;
586 1065
587 UNLOCK; 1066 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1067 {
1068 PERL_ASYNC_CHECK ();
588 1069
1070 if (cctx_current->flags & CC_TRACE_ALL)
1071 {
1072 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1073 {
1074 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1075 SV **bot, **top;
1076 AV *av = newAV (); /* return values */
1077 SV **cb;
1078 dSP;
1079
1080 GV *gv = CvGV (cx->blk_sub.cv);
1081 SV *fullname = sv_2mortal (newSV (0));
1082 if (isGV (gv))
1083 gv_efullname3 (fullname, gv, 0);
1084
1085 bot = PL_stack_base + cx->blk_oldsp + 1;
1086 top = cx->blk_gimme == G_ARRAY ? SP + 1
1087 : cx->blk_gimme == G_SCALAR ? bot + 1
1088 : bot;
1089
1090 av_extend (av, top - bot);
1091 while (bot < top)
1092 av_push (av, SvREFCNT_inc_NN (*bot++));
1093
1094 PL_runops = RUNOPS_DEFAULT;
1095 ENTER;
1096 SAVETMPS;
1097 EXTEND (SP, 3);
1098 PUSHMARK (SP);
1099 PUSHs (&PL_sv_no);
1100 PUSHs (fullname);
1101 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1102 PUTBACK;
1103 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1104 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1105 SPAGAIN;
1106 FREETMPS;
1107 LEAVE;
1108 PL_runops = runops_trace;
1109 }
1110
1111 if (oldcop != PL_curcop)
1112 {
1113 oldcop = PL_curcop;
1114
1115 if (PL_curcop != &PL_compiling)
1116 {
1117 SV **cb;
1118
1119 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1120 {
1121 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1122
1123 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1124 {
1125 dSP;
1126 GV *gv = CvGV (cx->blk_sub.cv);
1127 SV *fullname = sv_2mortal (newSV (0));
1128
1129 if (isGV (gv))
1130 gv_efullname3 (fullname, gv, 0);
1131
1132 PL_runops = RUNOPS_DEFAULT;
1133 ENTER;
1134 SAVETMPS;
1135 EXTEND (SP, 3);
1136 PUSHMARK (SP);
1137 PUSHs (&PL_sv_yes);
1138 PUSHs (fullname);
1139 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1140 PUTBACK;
1141 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1142 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1143 SPAGAIN;
1144 FREETMPS;
1145 LEAVE;
1146 PL_runops = runops_trace;
1147 }
1148
1149 oldcxix = cxstack_ix;
1150 }
1151
1152 if (cctx_current->flags & CC_TRACE_LINE)
1153 {
1154 dSP;
1155
1156 PL_runops = RUNOPS_DEFAULT;
1157 ENTER;
1158 SAVETMPS;
1159 EXTEND (SP, 3);
1160 PL_runops = RUNOPS_DEFAULT;
1161 PUSHMARK (SP);
1162 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1163 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1164 PUTBACK;
1165 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1166 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1167 SPAGAIN;
1168 FREETMPS;
1169 LEAVE;
1170 PL_runops = runops_trace;
1171 }
1172 }
1173 }
1174 }
1175 }
1176
1177 TAINT_NOT;
1178 return 0;
1179}
1180
1181static struct CoroSLF cctx_ssl_frame;
1182
1183static void
1184slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1185{
1186 ta->prev = 0;
1187}
1188
1189static int
1190slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1191{
1192 *frame = cctx_ssl_frame;
1193
1194 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1195}
1196
1197/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1198static void NOINLINE
1199cctx_prepare (pTHX)
1200{
589 PL_top_env = &PL_start_env; 1201 PL_top_env = &PL_start_env;
590 1202
591 sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg)); 1203 if (cctx_current->flags & CC_TRACE)
592 sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op)); 1204 PL_runops = runops_trace;
593 1205
594 /* continue at cctx_init, without entersub */ 1206 /* we already must be executing an SLF op, there is no other valid way
595 PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE)); 1207 * that can lead to creation of a new cctx */
1208 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1209 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
596 1210
1211 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1212 cctx_ssl_frame = slf_frame;
1213
1214 slf_frame.prepare = slf_prepare_set_stacklevel;
1215 slf_frame.check = slf_check_set_stacklevel;
1216}
1217
1218/* the tail of transfer: execute stuff we can only do after a transfer */
1219INLINE void
1220transfer_tail (pTHX)
1221{
1222 free_coro_mortal (aTHX);
1223}
1224
1225/*
1226 * this is a _very_ stripped down perl interpreter ;)
1227 */
1228static void
1229cctx_run (void *arg)
1230{
1231#ifdef USE_ITHREADS
1232# if CORO_PTHREAD
1233 PERL_SET_CONTEXT (coro_thx);
1234# endif
1235#endif
1236 {
1237 dTHX;
1238
1239 /* normally we would need to skip the entersub here */
1240 /* not doing so will re-execute it, which is exactly what we want */
1241 /* PL_nop = PL_nop->op_next */
1242
1243 /* inject a fake subroutine call to cctx_init */
1244 cctx_prepare (aTHX);
1245
1246 /* cctx_run is the alternative tail of transfer() */
1247 transfer_tail (aTHX);
1248
597 /* somebody will hit me for both perl_run and PL_restartop */ 1249 /* somebody or something will hit me for both perl_run and PL_restartop */
598 ret = perl_run (aTHX_ PERL_GET_CONTEXT); 1250 PL_restartop = PL_op;
599 printf ("ret %d\n", ret);//D 1251 perl_run (PL_curinterp);
1252 /*
1253 * Unfortunately, there is no way to get at the return values of the
1254 * coro body here, as perl_run destroys these
1255 */
600 1256
601 fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr); 1257 /*
602 abort (); 1258 * If perl-run returns we assume exit() was being called or the coro
1259 * fell off the end, which seems to be the only valid (non-bug)
1260 * reason for perl_run to return. We try to exit by jumping to the
1261 * bootstrap-time "top" top_env, as we cannot restore the "main"
1262 * coroutine as Coro has no such concept.
1263 * This actually isn't valid with the pthread backend, but OSes requiring
1264 * that backend are too broken to do it in a standards-compliant way.
1265 */
1266 PL_top_env = main_top_env;
1267 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1268 }
603} 1269}
604 1270
605static coro_stack * 1271static coro_cctx *
606stack_new () 1272cctx_new ()
607{ 1273{
608 coro_stack *stack; 1274 coro_cctx *cctx;
609 1275
1276 ++cctx_count;
610 New (0, stack, 1, coro_stack); 1277 New (0, cctx, 1, coro_cctx);
1278
1279 cctx->gen = cctx_gen;
1280 cctx->flags = 0;
1281 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1282
1283 return cctx;
1284}
1285
1286/* create a new cctx only suitable as source */
1287static coro_cctx *
1288cctx_new_empty ()
1289{
1290 coro_cctx *cctx = cctx_new ();
1291
1292 cctx->sptr = 0;
1293 coro_create (&cctx->cctx, 0, 0, 0, 0);
1294
1295 return cctx;
1296}
1297
1298/* create a new cctx suitable as destination/running a perl interpreter */
1299static coro_cctx *
1300cctx_new_run ()
1301{
1302 coro_cctx *cctx = cctx_new ();
1303 void *stack_start;
1304 size_t stack_size;
611 1305
612#if HAVE_MMAP 1306#if HAVE_MMAP
613
614 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; 1307 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
615 /* mmap suppsedly does allocate-on-write for us */ 1308 /* mmap supposedly does allocate-on-write for us */
616 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0); 1309 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
617 1310
618 if (stack->sptr == (void *)-1) 1311 if (cctx->sptr != (void *)-1)
1312 {
1313 #if CORO_STACKGUARD
1314 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1315 #endif
1316 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1317 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1318 cctx->flags |= CC_MAPPED;
619 { 1319 }
1320 else
1321#endif
1322 {
1323 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1324 New (0, cctx->sptr, cctx_stacksize, long);
1325
1326 if (!cctx->sptr)
1327 {
620 perror ("FATAL: unable to mmap stack for coroutine"); 1328 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
621 _exit (EXIT_FAILURE); 1329 _exit (EXIT_FAILURE);
1330 }
1331
1332 stack_start = cctx->sptr;
1333 stack_size = cctx->ssize;
1334 }
1335
1336 #if CORO_USE_VALGRIND
1337 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1338 #endif
1339
1340 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1341
1342 return cctx;
1343}
1344
1345static void
1346cctx_destroy (coro_cctx *cctx)
1347{
1348 if (!cctx)
1349 return;
1350
1351 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1352
1353 --cctx_count;
1354 coro_destroy (&cctx->cctx);
1355
1356 /* coro_transfer creates new, empty cctx's */
1357 if (cctx->sptr)
622 } 1358 {
1359 #if CORO_USE_VALGRIND
1360 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1361 #endif
623 1362
624# if STACKGUARD 1363#if HAVE_MMAP
625 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 1364 if (cctx->flags & CC_MAPPED)
1365 munmap (cctx->sptr, cctx->ssize);
1366 else
626# endif 1367#endif
1368 Safefree (cctx->sptr);
1369 }
627 1370
1371 Safefree (cctx);
1372}
1373
1374/* wether this cctx should be destructed */
1375#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1376
1377static coro_cctx *
1378cctx_get (pTHX)
1379{
1380 while (expect_true (cctx_first))
1381 {
1382 coro_cctx *cctx = cctx_first;
1383 cctx_first = cctx->next;
1384 --cctx_idle;
1385
1386 if (expect_true (!CCTX_EXPIRED (cctx)))
1387 return cctx;
1388
1389 cctx_destroy (cctx);
1390 }
1391
1392 return cctx_new_run ();
1393}
1394
1395static void
1396cctx_put (coro_cctx *cctx)
1397{
1398 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1399
1400 /* free another cctx if overlimit */
1401 if (expect_false (cctx_idle >= cctx_max_idle))
1402 {
1403 coro_cctx *first = cctx_first;
1404 cctx_first = first->next;
1405 --cctx_idle;
1406
1407 cctx_destroy (first);
1408 }
1409
1410 ++cctx_idle;
1411 cctx->next = cctx_first;
1412 cctx_first = cctx;
1413}
1414
1415/** coroutine switching *****************************************************/
1416
1417static void
1418transfer_check (pTHX_ struct coro *prev, struct coro *next)
1419{
1420 /* TODO: throwing up here is considered harmful */
1421
1422 if (expect_true (prev != next))
1423 {
1424 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1425 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1426
1427 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1428 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1429
1430#if !PERL_VERSION_ATLEAST (5,10,0)
1431 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1432 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1433#endif
1434 }
1435}
1436
1437/* always use the TRANSFER macro */
1438static void NOINLINE /* noinline so we have a fixed stackframe */
1439transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1440{
1441 dSTACKLEVEL;
1442
1443 /* sometimes transfer is only called to set idle_sp */
1444 if (expect_false (!prev))
1445 {
1446 cctx_current->idle_sp = STACKLEVEL;
1447 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1448 }
1449 else if (expect_true (prev != next))
1450 {
1451 coro_cctx *cctx_prev;
1452
1453 if (expect_false (prev->flags & CF_NEW))
1454 {
1455 /* create a new empty/source context */
1456 prev->flags &= ~CF_NEW;
1457 prev->flags |= CF_RUNNING;
1458 }
1459
1460 prev->flags &= ~CF_RUNNING;
1461 next->flags |= CF_RUNNING;
1462
1463 /* first get rid of the old state */
1464 save_perl (aTHX_ prev);
1465
1466 if (expect_false (next->flags & CF_NEW))
1467 {
1468 /* need to start coroutine */
1469 next->flags &= ~CF_NEW;
1470 /* setup coroutine call */
1471 coro_setup (aTHX_ next);
1472 }
1473 else
1474 load_perl (aTHX_ next);
1475
1476 /* possibly untie and reuse the cctx */
1477 if (expect_true (
1478 cctx_current->idle_sp == STACKLEVEL
1479 && !(cctx_current->flags & CC_TRACE)
1480 && !force_cctx
1481 ))
1482 {
1483 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1484 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1485
1486 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1487 /* without this the next cctx_get might destroy the running cctx while still in use */
1488 if (expect_false (CCTX_EXPIRED (cctx_current)))
1489 if (expect_true (!next->cctx))
1490 next->cctx = cctx_get (aTHX);
1491
1492 cctx_put (cctx_current);
1493 }
1494 else
1495 prev->cctx = cctx_current;
1496
1497 ++next->usecount;
1498
1499 cctx_prev = cctx_current;
1500 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1501
1502 next->cctx = 0;
1503
1504 if (expect_false (cctx_prev != cctx_current))
1505 {
1506 cctx_prev->top_env = PL_top_env;
1507 PL_top_env = cctx_current->top_env;
1508 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1509 }
1510
1511 transfer_tail (aTHX);
1512 }
1513}
1514
1515#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1516#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1517
1518/** high level stuff ********************************************************/
1519
1520static int
1521coro_state_destroy (pTHX_ struct coro *coro)
1522{
1523 if (coro->flags & CF_DESTROYED)
1524 return 0;
1525
1526 if (coro->on_destroy && !PL_dirty)
1527 coro->on_destroy (aTHX_ coro);
1528
1529 coro->flags |= CF_DESTROYED;
1530
1531 if (coro->flags & CF_READY)
1532 {
1533 /* reduce nready, as destroying a ready coro effectively unreadies it */
1534 /* alternative: look through all ready queues and remove the coro */
1535 --coro_nready;
1536 }
1537 else
1538 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1539
1540 if (coro->mainstack
1541 && coro->mainstack != main_mainstack
1542 && coro->slot
1543 && !PL_dirty)
1544 coro_destruct_perl (aTHX_ coro);
1545
1546 cctx_destroy (coro->cctx);
1547 SvREFCNT_dec (coro->startcv);
1548 SvREFCNT_dec (coro->args);
1549 SvREFCNT_dec (CORO_THROW);
1550
1551 if (coro->next) coro->next->prev = coro->prev;
1552 if (coro->prev) coro->prev->next = coro->next;
1553 if (coro == coro_first) coro_first = coro->next;
1554
1555 return 1;
1556}
1557
1558static int
1559coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1560{
1561 struct coro *coro = (struct coro *)mg->mg_ptr;
1562 mg->mg_ptr = 0;
1563
1564 coro->hv = 0;
1565
1566 if (--coro->refcnt < 0)
1567 {
1568 coro_state_destroy (aTHX_ coro);
1569 Safefree (coro);
1570 }
1571
1572 return 0;
1573}
1574
1575static int
1576coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1577{
1578 struct coro *coro = (struct coro *)mg->mg_ptr;
1579
1580 ++coro->refcnt;
1581
1582 return 0;
1583}
1584
1585static MGVTBL coro_state_vtbl = {
1586 0, 0, 0, 0,
1587 coro_state_free,
1588 0,
1589#ifdef MGf_DUP
1590 coro_state_dup,
628#else 1591#else
629 1592# define MGf_DUP 0
630 stack->ssize = STACKSIZE * (long)sizeof (long);
631 New (0, stack->sptr, STACKSIZE, long);
632
633 if (!stack->sptr)
634 {
635 perror (stderr, "FATAL: unable to malloc stack for coroutine");
636 _exit (EXIT_FAILURE);
637 }
638
639#endif 1593#endif
1594};
640 1595
641 coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
642
643 return stack;
644}
645
646static void 1596static void
647stack_free (coro_stack *stack) 1597prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
648{ 1598{
649 if (!stack) 1599 ta->prev = SvSTATE (prev_sv);
650 return; 1600 ta->next = SvSTATE (next_sv);
651 1601 TRANSFER_CHECK (*ta);
652#if HAVE_MMAP
653 munmap (stack->sptr, stack->ssize);
654#else
655 Safefree (stack->sptr);
656#endif
657
658 Safefree (stack);
659} 1602}
660 1603
661static coro_stack *stack_first; 1604static void
662 1605api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
663static coro_stack *
664stack_get ()
665{ 1606{
666 coro_stack *stack; 1607 struct coro_transfer_args ta;
667 1608
668 if (stack_first) 1609 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
669 { 1610 TRANSFER (ta, 1);
670 stack = stack_first; 1611}
671 stack_first = stack->next; 1612
672 } 1613/*****************************************************************************/
673 else 1614/* gensub: simple closure generation utility */
1615
1616#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1617
1618/* create a closure from XS, returns a code reference */
1619/* the arg can be accessed via GENSUB_ARG from the callback */
1620/* the callback must use dXSARGS/XSRETURN */
1621static SV *
1622gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1623{
1624 CV *cv = (CV *)newSV (0);
1625
1626 sv_upgrade ((SV *)cv, SVt_PVCV);
1627
1628 CvANON_on (cv);
1629 CvISXSUB_on (cv);
1630 CvXSUB (cv) = xsub;
1631 GENSUB_ARG = arg;
1632
1633 return newRV_noinc ((SV *)cv);
1634}
1635
1636/** Coro ********************************************************************/
1637
1638INLINE void
1639coro_enq (pTHX_ struct coro *coro)
1640{
1641 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1642
1643 SvREFCNT_inc_NN (coro->hv);
1644
1645 coro->next_ready = 0;
1646 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1647 ready [1] = coro;
1648}
1649
1650INLINE struct coro *
1651coro_deq (pTHX)
1652{
1653 int prio;
1654
1655 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
674 { 1656 {
675 stack = stack_new (); 1657 struct coro **ready = coro_ready [prio];
676 PL_op = PL_op->op_next;
677 }
678 1658
679 return stack; 1659 if (ready [0])
680}
681
682static void
683stack_put (coro_stack *stack)
684{
685 stack->next = stack_first;
686 stack_first = stack;
687}
688
689/* never call directly, always through the coro_state_transfer global variable */
690static void
691transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
692{
693 dSTACKLEVEL;
694
695 /* sometimes transfer is only called to set idle_sp */
696 if (flags == TRANSFER_SET_STACKLEVEL)
697 ((coro_stack *)prev)->idle_sp = STACKLEVEL;
698 else if (prev != next)
699 {
700 coro_stack *prev__stack;
701
702 LOCK;
703
704 if (next->mainstack)
705 { 1660 {
706 /* coroutine already started */ 1661 struct coro *coro = ready [0];
707 SAVE (prev, flags); 1662 ready [0] = coro->next_ready;
708 LOAD (next); 1663 return coro;
1664 }
1665 }
1666
1667 return 0;
1668}
1669
1670static int
1671api_ready (pTHX_ SV *coro_sv)
1672{
1673 struct coro *coro;
1674 SV *sv_hook;
1675 void (*xs_hook)(void);
1676
1677 coro = SvSTATE (coro_sv);
1678
1679 if (coro->flags & CF_READY)
1680 return 0;
1681
1682 coro->flags |= CF_READY;
1683
1684 sv_hook = coro_nready ? 0 : coro_readyhook;
1685 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1686
1687 coro_enq (aTHX_ coro);
1688 ++coro_nready;
1689
1690 if (sv_hook)
1691 {
1692 dSP;
1693
1694 ENTER;
1695 SAVETMPS;
1696
1697 PUSHMARK (SP);
1698 PUTBACK;
1699 call_sv (sv_hook, G_VOID | G_DISCARD);
1700
1701 FREETMPS;
1702 LEAVE;
1703 }
1704
1705 if (xs_hook)
1706 xs_hook ();
1707
1708 return 1;
1709}
1710
1711static int
1712api_is_ready (pTHX_ SV *coro_sv)
1713{
1714 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1715}
1716
1717/* expects to own a reference to next->hv */
1718INLINE void
1719prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1720{
1721 SV *prev_sv = SvRV (coro_current);
1722
1723 ta->prev = SvSTATE_hv (prev_sv);
1724 ta->next = next;
1725
1726 TRANSFER_CHECK (*ta);
1727
1728 SvRV_set (coro_current, (SV *)next->hv);
1729
1730 free_coro_mortal (aTHX);
1731 coro_mortal = prev_sv;
1732}
1733
1734static void
1735prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1736{
1737 for (;;)
1738 {
1739 struct coro *next = coro_deq (aTHX);
1740
1741 if (expect_true (next))
1742 {
1743 /* cannot transfer to destroyed coros, skip and look for next */
1744 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
1745 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
1746 else
1747 {
1748 next->flags &= ~CF_READY;
1749 --coro_nready;
1750
1751 prepare_schedule_to (aTHX_ ta, next);
1752 break;
1753 }
709 } 1754 }
710 else 1755 else
711 { 1756 {
712 /* need to start coroutine */ 1757 /* nothing to schedule: call the idle handler */
713 /* first get rid of the old state */ 1758 if (SvROK (sv_idle)
714 SAVE (prev, -1); 1759 && SvOBJECT (SvRV (sv_idle)))
715 /* setup coroutine call */ 1760 {
716 setup_coro (next); 1761 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
717 /* need a stack */ 1762 api_ready (aTHX_ SvRV (sv_idle));
718 next->stack = 0; 1763 --coro_nready;
1764 }
1765 else
1766 {
1767 dSP;
1768
1769 ENTER;
1770 SAVETMPS;
1771
1772 PUSHMARK (SP);
1773 PUTBACK;
1774 call_sv (sv_idle, G_VOID | G_DISCARD);
1775
1776 FREETMPS;
1777 LEAVE;
1778 }
719 } 1779 }
1780 }
1781}
720 1782
721 if (!prev->stack) 1783INLINE void
722 /* create a new empty context */ 1784prepare_cede (pTHX_ struct coro_transfer_args *ta)
723 Newz (0, prev->stack, 1, coro_stack); 1785{
1786 api_ready (aTHX_ coro_current);
1787 prepare_schedule (aTHX_ ta);
1788}
724 1789
725 prev__stack = prev->stack; 1790INLINE void
1791prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1792{
1793 SV *prev = SvRV (coro_current);
726 1794
727 /* possibly "free" the stack */ 1795 if (coro_nready)
728 if (prev__stack->idle_sp == STACKLEVEL) 1796 {
1797 prepare_schedule (aTHX_ ta);
1798 api_ready (aTHX_ prev);
1799 }
1800 else
1801 prepare_nop (aTHX_ ta);
1802}
1803
1804static void
1805api_schedule (pTHX)
1806{
1807 struct coro_transfer_args ta;
1808
1809 prepare_schedule (aTHX_ &ta);
1810 TRANSFER (ta, 1);
1811}
1812
1813static void
1814api_schedule_to (pTHX_ SV *coro_sv)
1815{
1816 struct coro_transfer_args ta;
1817 struct coro *next = SvSTATE (coro_sv);
1818
1819 SvREFCNT_inc_NN (coro_sv);
1820 prepare_schedule_to (aTHX_ &ta, next);
1821}
1822
1823static int
1824api_cede (pTHX)
1825{
1826 struct coro_transfer_args ta;
1827
1828 prepare_cede (aTHX_ &ta);
1829
1830 if (expect_true (ta.prev != ta.next))
1831 {
1832 TRANSFER (ta, 1);
1833 return 1;
1834 }
1835 else
1836 return 0;
1837}
1838
1839static int
1840api_cede_notself (pTHX)
1841{
1842 if (coro_nready)
1843 {
1844 struct coro_transfer_args ta;
1845
1846 prepare_cede_notself (aTHX_ &ta);
1847 TRANSFER (ta, 1);
1848 return 1;
1849 }
1850 else
1851 return 0;
1852}
1853
1854static void
1855api_trace (pTHX_ SV *coro_sv, int flags)
1856{
1857 struct coro *coro = SvSTATE (coro_sv);
1858
1859 if (coro->flags & CF_RUNNING)
1860 croak ("cannot enable tracing on a running coroutine, caught");
1861
1862 if (flags & CC_TRACE)
1863 {
1864 if (!coro->cctx)
1865 coro->cctx = cctx_new_run ();
1866 else if (!(coro->cctx->flags & CC_TRACE))
1867 croak ("cannot enable tracing on coroutine with custom stack, caught");
1868
1869 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1870 }
1871 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1872 {
1873 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1874
1875 if (coro->flags & CF_RUNNING)
1876 PL_runops = RUNOPS_DEFAULT;
1877 else
1878 coro->slot->runops = RUNOPS_DEFAULT;
1879 }
1880}
1881
1882static void
1883coro_call_on_destroy (pTHX_ struct coro *coro)
1884{
1885 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1886 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1887
1888 if (on_destroyp)
1889 {
1890 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1891
1892 while (AvFILLp (on_destroy) >= 0)
729 { 1893 {
730 stack_put (prev__stack); 1894 dSP; /* don't disturb outer sp */
731 prev->stack = 0; 1895 SV *cb = av_pop (on_destroy);
1896
1897 PUSHMARK (SP);
1898
1899 if (statusp)
1900 {
1901 int i;
1902 AV *status = (AV *)SvRV (*statusp);
1903 EXTEND (SP, AvFILLp (status) + 1);
1904
1905 for (i = 0; i <= AvFILLp (status); ++i)
1906 PUSHs (AvARRAY (status)[i]);
1907 }
1908
1909 PUTBACK;
1910 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
732 } 1911 }
733
734 if (!next->stack)
735 next->stack = stack_get ();
736
737 if (prev__stack != next->stack)
738 {
739 prev__stack->top_env = PL_top_env;
740 PL_top_env = next->stack->top_env;
741 coro_transfer (&prev__stack->cctx, &next->stack->cctx);
742 }
743
744 free_coro_mortal ();
745
746 UNLOCK;
747 }
748}
749
750/* use this function pointer to call the above function */
751/* this is done to increase chances of the compiler not inlining the call */
752/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755struct transfer_args
756{
757 struct coro *prev, *next;
758 int flags;
759};
760
761#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
762
763static void
764coro_state_destroy (struct coro *coro)
765{
766 if (coro->refcnt--)
767 return;
768
769 if (coro->mainstack && coro->mainstack != main_mainstack)
770 { 1912 }
771 struct coro temp;
772
773 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
774 LOAD (aTHX_ coro);
775
776 destroy_stacks (aTHX);
777
778 LOAD ((&temp)); /* this will get rid of defsv etc.. */
779
780 coro->mainstack = 0;
781 }
782
783 stack_free (coro->stack);
784 SvREFCNT_dec (coro->args);
785 Safefree (coro);
786} 1913}
1914
1915static void
1916slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1917{
1918 int i;
1919 HV *hv = (HV *)SvRV (coro_current);
1920 AV *av = newAV ();
1921
1922 av_extend (av, items - 1);
1923 for (i = 0; i < items; ++i)
1924 av_push (av, SvREFCNT_inc_NN (arg [i]));
1925
1926 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1927
1928 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1929 api_ready (aTHX_ sv_manager);
1930
1931 frame->prepare = prepare_schedule;
1932 frame->check = slf_check_repeat;
1933
1934 /* as a minor optimisation, we could unwind all stacks here */
1935 /* but that puts extra pressure on pp_slf, and is not worth much */
1936 /*coro_unwind_stacks (aTHX);*/
1937}
1938
1939/*****************************************************************************/
1940/* async pool handler */
787 1941
788static int 1942static int
789coro_state_clear (SV *sv, MAGIC *mg) 1943slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
790{ 1944{
1945 HV *hv = (HV *)SvRV (coro_current);
791 struct coro *coro = (struct coro *)mg->mg_ptr; 1946 struct coro *coro = (struct coro *)frame->data;
792 mg->mg_ptr = 0;
793 1947
794 coro_state_destroy (coro); 1948 if (!coro->invoke_cb)
795 1949 return 1; /* loop till we have invoke */
796 return 0; 1950 else
797}
798
799static int
800coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
801{
802 struct coro *coro = (struct coro *)mg->mg_ptr;
803
804 ++coro->refcnt;
805
806 return 0;
807}
808
809static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
810
811static struct coro *
812SvSTATE (SV *coro)
813{
814 HV *stash;
815 MAGIC *mg;
816
817 if (SvROK (coro))
818 coro = SvRV (coro);
819
820 stash = SvSTASH (coro);
821 if (stash != coro_stash && stash != coro_state_stash)
822 {
823 /* very slow, but rare, check */
824 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825 croak ("Coro::State object required");
826 }
827
828 mg = SvMAGIC (coro);
829 assert (mg->mg_type == PERL_MAGIC_ext);
830 return (struct coro *)mg->mg_ptr;
831}
832
833static void
834prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
835{
836 ta->prev = SvSTATE (prev);
837 ta->next = SvSTATE (next);
838 ta->flags = flags;
839}
840
841static void
842api_transfer (SV *prev, SV *next, int flags)
843{
844 dTHX;
845 struct transfer_args ta;
846
847 prepare_transfer (aTHX_ &ta, prev, next, flags);
848 TRANSFER (ta);
849}
850
851/** Coro ********************************************************************/
852
853#define PRIO_MAX 3
854#define PRIO_HIGH 1
855#define PRIO_NORMAL 0
856#define PRIO_LOW -1
857#define PRIO_IDLE -3
858#define PRIO_MIN -4
859
860/* for Coro.pm */
861static GV *coro_current, *coro_idle;
862static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863static int coro_nready;
864
865static void
866coro_enq (pTHX_ SV *sv)
867{
868 int prio;
869
870 if (SvTYPE (sv) != SVt_PVHV)
871 croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873 prio = SvSTATE (sv)->prio;
874
875 av_push (coro_ready [prio - PRIO_MIN], sv);
876 coro_nready++;
877}
878
879static SV *
880coro_deq (pTHX_ int min_prio)
881{
882 int prio = PRIO_MAX - PRIO_MIN;
883
884 min_prio -= PRIO_MIN;
885 if (min_prio < 0)
886 min_prio = 0;
887
888 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889 if (AvFILLp (coro_ready [prio]) >= 0)
890 { 1951 {
891 coro_nready--; 1952 hv_store (hv, "desc", sizeof ("desc") - 1,
892 return av_shift (coro_ready [prio]); 1953 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
893 }
894 1954
895 return 0; 1955 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
896}
897
898static void
899api_ready (SV *coro)
900{
901 dTHX;
902
903 if (SvROK (coro))
904 coro = SvRV (coro);
905
906 LOCK;
907 coro_enq (aTHX_ SvREFCNT_inc (coro));
908 UNLOCK;
909}
910
911static void
912prepare_schedule (aTHX_ struct transfer_args *ta)
913{
914 SV *current, *prev, *next;
915
916 LOCK;
917
918 current = GvSV (coro_current);
919
920 for (;;)
921 {
922 LOCK;
923
924 next = coro_deq (aTHX_ PRIO_MIN);
925
926 if (next)
927 break;
928
929 UNLOCK;
930 1956
931 { 1957 {
932 dSP; 1958 dSP;
933 1959 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
934 ENTER;
935 SAVETMPS;
936
937 PUSHMARK (SP);
938 PUTBACK; 1960 PUTBACK;
939 call_sv (GvSV (coro_idle), G_DISCARD);
940
941 FREETMPS;
942 LEAVE;
943 } 1961 }
1962
1963 SvREFCNT_dec (GvAV (PL_defgv));
1964 GvAV (PL_defgv) = coro->invoke_av;
1965 coro->invoke_av = 0;
1966
1967 return 0;
1968 }
1969}
1970
1971static void
1972slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1973{
1974 HV *hv = (HV *)SvRV (coro_current);
1975 struct coro *coro = SvSTATE_hv ((SV *)hv);
1976
1977 if (expect_true (coro->saved_deffh))
944 } 1978 {
1979 /* subsequent iteration */
1980 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1981 coro->saved_deffh = 0;
945 1982
946 prev = SvRV (current); 1983 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
947 SvRV (current) = next; 1984 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1985 {
1986 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1987 coro->invoke_av = newAV ();
948 1988
949 /* free this only after the transfer */ 1989 frame->prepare = prepare_nop;
950 free_coro_mortal (); 1990 }
951 coro_mortal = prev; 1991 else
1992 {
1993 av_clear (GvAV (PL_defgv));
1994 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
952 1995
953 ta->prev = SvSTATE (prev); 1996 coro->prio = 0;
954 ta->next = SvSTATE (next);
955 ta->flags = TRANSFER_SAVE_ALL;
956 1997
957 UNLOCK; 1998 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
958} 1999 api_trace (aTHX_ coro_current, 0);
959 2000
2001 frame->prepare = prepare_schedule;
2002 av_push (av_async_pool, SvREFCNT_inc (hv));
2003 }
2004 }
2005 else
2006 {
2007 /* first iteration, simply fall through */
2008 frame->prepare = prepare_nop;
2009 }
2010
2011 frame->check = slf_check_pool_handler;
2012 frame->data = (void *)coro;
2013}
2014
2015/*****************************************************************************/
2016/* rouse callback */
2017
2018#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2019
2020static void
2021coro_rouse_callback (pTHX_ CV *cv)
2022{
2023 dXSARGS;
2024 SV *data = (SV *)GENSUB_ARG;
2025
2026 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2027 {
2028 /* first call, set args */
2029 SV *coro = SvRV (data);
2030 AV *av = newAV ();
2031
2032 SvRV_set (data, (SV *)av);
2033
2034 /* better take a full copy of the arguments */
2035 while (items--)
2036 av_store (av, items, newSVsv (ST (items)));
2037
2038 api_ready (aTHX_ coro);
2039 SvREFCNT_dec (coro);
2040 }
2041
2042 XSRETURN_EMPTY;
2043}
2044
960static void 2045static int
2046slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2047{
2048 SV *data = (SV *)frame->data;
2049
2050 if (CORO_THROW)
2051 return 0;
2052
2053 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2054 return 1;
2055
2056 /* now push all results on the stack */
2057 {
2058 dSP;
2059 AV *av = (AV *)SvRV (data);
2060 int i;
2061
2062 EXTEND (SP, AvFILLp (av) + 1);
2063 for (i = 0; i <= AvFILLp (av); ++i)
2064 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2065
2066 /* we have stolen the elements, so set length to zero and free */
2067 AvFILLp (av) = -1;
2068 av_undef (av);
2069
2070 PUTBACK;
2071 }
2072
2073 return 0;
2074}
2075
2076static void
2077slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2078{
2079 SV *cb;
2080
2081 if (items)
2082 cb = arg [0];
2083 else
2084 {
2085 struct coro *coro = SvSTATE_current;
2086
2087 if (!coro->rouse_cb)
2088 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2089
2090 cb = sv_2mortal (coro->rouse_cb);
2091 coro->rouse_cb = 0;
2092 }
2093
2094 if (!SvROK (cb)
2095 || SvTYPE (SvRV (cb)) != SVt_PVCV
2096 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2097 croak ("Coro::rouse_wait called with illegal callback argument,");
2098
2099 {
2100 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2101 SV *data = (SV *)GENSUB_ARG;
2102
2103 frame->data = (void *)data;
2104 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2105 frame->check = slf_check_rouse_wait;
2106 }
2107}
2108
2109static SV *
2110coro_new_rouse_cb (pTHX)
2111{
2112 HV *hv = (HV *)SvRV (coro_current);
2113 struct coro *coro = SvSTATE_hv (hv);
2114 SV *data = newRV_inc ((SV *)hv);
2115 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2116
2117 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2118 SvREFCNT_dec (data); /* magicext increases the refcount */
2119
2120 SvREFCNT_dec (coro->rouse_cb);
2121 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2122
2123 return cb;
2124}
2125
2126/*****************************************************************************/
2127/* schedule-like-function opcode (SLF) */
2128
2129static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2130static const CV *slf_cv;
2131static SV **slf_argv;
2132static int slf_argc, slf_arga; /* count, allocated */
2133static I32 slf_ax; /* top of stack, for restore */
2134
2135/* this restores the stack in the case we patched the entersub, to */
2136/* recreate the stack frame as perl will on following calls */
2137/* since entersub cleared the stack */
2138static OP *
2139pp_restore (pTHX)
2140{
2141 int i;
2142 SV **SP = PL_stack_base + slf_ax;
2143
2144 PUSHMARK (SP);
2145
2146 EXTEND (SP, slf_argc + 1);
2147
2148 for (i = 0; i < slf_argc; ++i)
2149 PUSHs (sv_2mortal (slf_argv [i]));
2150
2151 PUSHs ((SV *)CvGV (slf_cv));
2152
2153 RETURNOP (slf_restore.op_first);
2154}
2155
2156static void
2157slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2158{
2159 SV **arg = (SV **)slf_frame.data;
2160
2161 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2162}
2163
2164static void
2165slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2166{
2167 if (items != 2)
2168 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2169
2170 frame->prepare = slf_prepare_transfer;
2171 frame->check = slf_check_nop;
2172 frame->data = (void *)arg; /* let's hope it will stay valid */
2173}
2174
2175static void
2176slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2177{
2178 frame->prepare = prepare_schedule;
2179 frame->check = slf_check_nop;
2180}
2181
2182static void
961prepare_cede (aTHX_ struct transfer_args *ta) 2183slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
962{ 2184{
963 LOCK; 2185 struct coro *next = (struct coro *)slf_frame.data;
964 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965 UNLOCK;
966 2186
2187 SvREFCNT_inc_NN (next->hv);
967 prepare_schedule (ta); 2188 prepare_schedule_to (aTHX_ ta, next);
968} 2189}
969 2190
970static void 2191static void
971api_schedule (void) 2192slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
972{ 2193{
973 dTHX; 2194 if (!items)
2195 croak ("Coro::schedule_to expects a coroutine argument, caught");
2196
2197 frame->data = (void *)SvSTATE (arg [0]);
2198 frame->prepare = slf_prepare_schedule_to;
2199 frame->check = slf_check_nop;
2200}
2201
2202static void
2203slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2204{
2205 api_ready (aTHX_ SvRV (coro_current));
2206
2207 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2208}
2209
2210static void
2211slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2212{
2213 frame->prepare = prepare_cede;
2214 frame->check = slf_check_nop;
2215}
2216
2217static void
2218slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2219{
2220 frame->prepare = prepare_cede_notself;
2221 frame->check = slf_check_nop;
2222}
2223
2224/*
2225 * these not obviously related functions are all rolled into one
2226 * function to increase chances that they all will call transfer with the same
2227 * stack offset
2228 * SLF stands for "schedule-like-function".
2229 */
2230static OP *
2231pp_slf (pTHX)
2232{
2233 I32 checkmark; /* mark SP to see how many elements check has pushed */
2234
2235 /* set up the slf frame, unless it has already been set-up */
2236 /* the latter happens when a new coro has been started */
2237 /* or when a new cctx was attached to an existing coroutine */
2238 if (expect_true (!slf_frame.prepare))
2239 {
2240 /* first iteration */
2241 dSP;
2242 SV **arg = PL_stack_base + TOPMARK + 1;
2243 int items = SP - arg; /* args without function object */
2244 SV *gv = *sp;
2245
2246 /* do a quick consistency check on the "function" object, and if it isn't */
2247 /* for us, divert to the real entersub */
2248 if (SvTYPE (gv) != SVt_PVGV
2249 || !GvCV (gv)
2250 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2251 return PL_ppaddr[OP_ENTERSUB](aTHX);
2252
2253 if (!(PL_op->op_flags & OPf_STACKED))
2254 {
2255 /* ampersand-form of call, use @_ instead of stack */
2256 AV *av = GvAV (PL_defgv);
2257 arg = AvARRAY (av);
2258 items = AvFILLp (av) + 1;
2259 }
2260
2261 /* now call the init function, which needs to set up slf_frame */
2262 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2263 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2264
2265 /* pop args */
2266 SP = PL_stack_base + POPMARK;
2267
2268 PUTBACK;
2269 }
2270
2271 /* now that we have a slf_frame, interpret it! */
2272 /* we use a callback system not to make the code needlessly */
2273 /* complicated, but so we can run multiple perl coros from one cctx */
2274
2275 do
2276 {
974 struct transfer_args ta; 2277 struct coro_transfer_args ta;
975 2278
976 prepare_schedule (&ta); 2279 slf_frame.prepare (aTHX_ &ta);
977 TRANSFER (ta); 2280 TRANSFER (ta, 0);
978}
979 2281
2282 checkmark = PL_stack_sp - PL_stack_base;
2283 }
2284 while (slf_frame.check (aTHX_ &slf_frame));
2285
2286 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2287
2288 /* exception handling */
2289 if (expect_false (CORO_THROW))
2290 {
2291 SV *exception = sv_2mortal (CORO_THROW);
2292
2293 CORO_THROW = 0;
2294 sv_setsv (ERRSV, exception);
2295 croak (0);
2296 }
2297
2298 /* return value handling - mostly like entersub */
2299 /* make sure we put something on the stack in scalar context */
2300 if (GIMME_V == G_SCALAR)
2301 {
2302 dSP;
2303 SV **bot = PL_stack_base + checkmark;
2304
2305 if (sp == bot) /* too few, push undef */
2306 bot [1] = &PL_sv_undef;
2307 else if (sp != bot + 1) /* too many, take last one */
2308 bot [1] = *sp;
2309
2310 SP = bot + 1;
2311
2312 PUTBACK;
2313 }
2314
2315 return NORMAL;
2316}
2317
2318static void
2319api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2320{
2321 int i;
2322 SV **arg = PL_stack_base + ax;
2323 int items = PL_stack_sp - arg + 1;
2324
2325 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2326
2327 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2328 && PL_op->op_ppaddr != pp_slf)
2329 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2330
2331 CvFLAGS (cv) |= CVf_SLF;
2332 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2333 slf_cv = cv;
2334
2335 /* we patch the op, and then re-run the whole call */
2336 /* we have to put the same argument on the stack for this to work */
2337 /* and this will be done by pp_restore */
2338 slf_restore.op_next = (OP *)&slf_restore;
2339 slf_restore.op_type = OP_CUSTOM;
2340 slf_restore.op_ppaddr = pp_restore;
2341 slf_restore.op_first = PL_op;
2342
2343 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2344
2345 if (PL_op->op_flags & OPf_STACKED)
2346 {
2347 if (items > slf_arga)
2348 {
2349 slf_arga = items;
2350 free (slf_argv);
2351 slf_argv = malloc (slf_arga * sizeof (SV *));
2352 }
2353
2354 slf_argc = items;
2355
2356 for (i = 0; i < items; ++i)
2357 slf_argv [i] = SvREFCNT_inc (arg [i]);
2358 }
2359 else
2360 slf_argc = 0;
2361
2362 PL_op->op_ppaddr = pp_slf;
2363 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2364
2365 PL_op = (OP *)&slf_restore;
2366}
2367
2368/*****************************************************************************/
2369/* dynamic wind */
2370
2371static void
2372on_enterleave_call (pTHX_ SV *cb)
2373{
2374 dSP;
2375
2376 PUSHSTACK;
2377
2378 PUSHMARK (SP);
2379 PUTBACK;
2380 call_sv (cb, G_VOID | G_DISCARD);
2381 SPAGAIN;
2382
2383 POPSTACK;
2384}
2385
2386static SV *
2387coro_avp_pop_and_free (pTHX_ AV **avp)
2388{
2389 AV *av = *avp;
2390 SV *res = av_pop (av);
2391
2392 if (AvFILLp (av) < 0)
2393 {
2394 *avp = 0;
2395 SvREFCNT_dec (av);
2396 }
2397
2398 return res;
2399}
2400
2401static void
2402coro_pop_on_enter (pTHX_ void *coro)
2403{
2404 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2405 SvREFCNT_dec (cb);
2406}
2407
2408static void
2409coro_pop_on_leave (pTHX_ void *coro)
2410{
2411 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2412 on_enterleave_call (aTHX_ sv_2mortal (cb));
2413}
2414
2415/*****************************************************************************/
2416/* PerlIO::cede */
2417
2418typedef struct
2419{
2420 PerlIOBuf base;
2421 NV next, every;
2422} PerlIOCede;
2423
2424static IV
2425PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2426{
2427 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2428
2429 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2430 self->next = nvtime () + self->every;
2431
2432 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2433}
2434
2435static SV *
2436PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2437{
2438 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2439
2440 return newSVnv (self->every);
2441}
2442
2443static IV
2444PerlIOCede_flush (pTHX_ PerlIO *f)
2445{
2446 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2447 double now = nvtime ();
2448
2449 if (now >= self->next)
2450 {
2451 api_cede (aTHX);
2452 self->next = now + self->every;
2453 }
2454
2455 return PerlIOBuf_flush (aTHX_ f);
2456}
2457
2458static PerlIO_funcs PerlIO_cede =
2459{
2460 sizeof(PerlIO_funcs),
2461 "cede",
2462 sizeof(PerlIOCede),
2463 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2464 PerlIOCede_pushed,
2465 PerlIOBuf_popped,
2466 PerlIOBuf_open,
2467 PerlIOBase_binmode,
2468 PerlIOCede_getarg,
2469 PerlIOBase_fileno,
2470 PerlIOBuf_dup,
2471 PerlIOBuf_read,
2472 PerlIOBuf_unread,
2473 PerlIOBuf_write,
2474 PerlIOBuf_seek,
2475 PerlIOBuf_tell,
2476 PerlIOBuf_close,
2477 PerlIOCede_flush,
2478 PerlIOBuf_fill,
2479 PerlIOBase_eof,
2480 PerlIOBase_error,
2481 PerlIOBase_clearerr,
2482 PerlIOBase_setlinebuf,
2483 PerlIOBuf_get_base,
2484 PerlIOBuf_bufsiz,
2485 PerlIOBuf_get_ptr,
2486 PerlIOBuf_get_cnt,
2487 PerlIOBuf_set_ptrcnt,
2488};
2489
2490/*****************************************************************************/
2491/* Coro::Semaphore & Coro::Signal */
2492
2493static SV *
2494coro_waitarray_new (pTHX_ int count)
2495{
2496 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2497 AV *av = newAV ();
2498 SV **ary;
2499
2500 /* unfortunately, building manually saves memory */
2501 Newx (ary, 2, SV *);
2502 AvALLOC (av) = ary;
2503#if PERL_VERSION_ATLEAST (5,10,0)
2504 AvARRAY (av) = ary;
2505#else
2506 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2507 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2508 SvPVX ((SV *)av) = (char *)ary;
2509#endif
2510 AvMAX (av) = 1;
2511 AvFILLp (av) = 0;
2512 ary [0] = newSViv (count);
2513
2514 return newRV_noinc ((SV *)av);
2515}
2516
2517/* semaphore */
2518
2519static void
2520coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2521{
2522 SV *count_sv = AvARRAY (av)[0];
2523 IV count = SvIVX (count_sv);
2524
2525 count += adjust;
2526 SvIVX (count_sv) = count;
2527
2528 /* now wake up as many waiters as are expected to lock */
2529 while (count > 0 && AvFILLp (av) > 0)
2530 {
2531 SV *cb;
2532
2533 /* swap first two elements so we can shift a waiter */
2534 AvARRAY (av)[0] = AvARRAY (av)[1];
2535 AvARRAY (av)[1] = count_sv;
2536 cb = av_shift (av);
2537
2538 if (SvOBJECT (cb))
2539 {
2540 api_ready (aTHX_ cb);
2541 --count;
2542 }
2543 else if (SvTYPE (cb) == SVt_PVCV)
2544 {
2545 dSP;
2546 PUSHMARK (SP);
2547 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2548 PUTBACK;
2549 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2550 }
2551
2552 SvREFCNT_dec (cb);
2553 }
2554}
2555
2556static void
2557coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2558{
2559 /* call $sem->adjust (0) to possibly wake up some other waiters */
2560 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2561}
2562
980static void 2563static int
981api_cede (void) 2564slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
982{ 2565{
983 dTHX; 2566 AV *av = (AV *)frame->data;
984 struct transfer_args ta; 2567 SV *count_sv = AvARRAY (av)[0];
985 2568
986 prepare_cede (&ta); 2569 /* if we are about to throw, don't actually acquire the lock, just throw */
987 TRANSFER (ta); 2570 if (CORO_THROW)
988} 2571 return 0;
2572 else if (SvIVX (count_sv) > 0)
2573 {
2574 SvSTATE_current->on_destroy = 0;
989 2575
2576 if (acquire)
2577 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2578 else
2579 coro_semaphore_adjust (aTHX_ av, 0);
2580
2581 return 0;
2582 }
2583 else
2584 {
2585 int i;
2586 /* if we were woken up but can't down, we look through the whole */
2587 /* waiters list and only add us if we aren't in there already */
2588 /* this avoids some degenerate memory usage cases */
2589
2590 for (i = 1; i <= AvFILLp (av); ++i)
2591 if (AvARRAY (av)[i] == SvRV (coro_current))
2592 return 1;
2593
2594 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2595 return 1;
2596 }
2597}
2598
2599static int
2600slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2601{
2602 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2603}
2604
2605static int
2606slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2607{
2608 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2609}
2610
2611static void
2612slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2613{
2614 AV *av = (AV *)SvRV (arg [0]);
2615
2616 if (SvIVX (AvARRAY (av)[0]) > 0)
2617 {
2618 frame->data = (void *)av;
2619 frame->prepare = prepare_nop;
2620 }
2621 else
2622 {
2623 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2624
2625 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2626 frame->prepare = prepare_schedule;
2627
2628 /* to avoid race conditions when a woken-up coro gets terminated */
2629 /* we arrange for a temporary on_destroy that calls adjust (0) */
2630 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2631 }
2632}
2633
2634static void
2635slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2636{
2637 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2638 frame->check = slf_check_semaphore_down;
2639}
2640
2641static void
2642slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2643{
2644 if (items >= 2)
2645 {
2646 /* callback form */
2647 AV *av = (AV *)SvRV (arg [0]);
2648 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2649
2650 av_push (av, SvREFCNT_inc_NN (cb_cv));
2651
2652 if (SvIVX (AvARRAY (av)[0]) > 0)
2653 coro_semaphore_adjust (aTHX_ av, 0);
2654
2655 frame->prepare = prepare_nop;
2656 frame->check = slf_check_nop;
2657 }
2658 else
2659 {
2660 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2661 frame->check = slf_check_semaphore_wait;
2662 }
2663}
2664
2665/* signal */
2666
2667static void
2668coro_signal_wake (pTHX_ AV *av, int count)
2669{
2670 SvIVX (AvARRAY (av)[0]) = 0;
2671
2672 /* now signal count waiters */
2673 while (count > 0 && AvFILLp (av) > 0)
2674 {
2675 SV *cb;
2676
2677 /* swap first two elements so we can shift a waiter */
2678 cb = AvARRAY (av)[0];
2679 AvARRAY (av)[0] = AvARRAY (av)[1];
2680 AvARRAY (av)[1] = cb;
2681
2682 cb = av_shift (av);
2683
2684 if (SvTYPE (cb) == SVt_PVCV)
2685 {
2686 dSP;
2687 PUSHMARK (SP);
2688 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2689 PUTBACK;
2690 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2691 }
2692 else
2693 {
2694 api_ready (aTHX_ cb);
2695 sv_setiv (cb, 0); /* signal waiter */
2696 }
2697
2698 SvREFCNT_dec (cb);
2699
2700 --count;
2701 }
2702}
2703
2704static int
2705slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2706{
2707 /* if we are about to throw, also stop waiting */
2708 return SvROK ((SV *)frame->data) && !CORO_THROW;
2709}
2710
2711static void
2712slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2713{
2714 AV *av = (AV *)SvRV (arg [0]);
2715
2716 if (items >= 2)
2717 {
2718 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2719 av_push (av, SvREFCNT_inc_NN (cb_cv));
2720
2721 if (SvIVX (AvARRAY (av)[0]))
2722 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2723
2724 frame->prepare = prepare_nop;
2725 frame->check = slf_check_nop;
2726 }
2727 else if (SvIVX (AvARRAY (av)[0]))
2728 {
2729 SvIVX (AvARRAY (av)[0]) = 0;
2730 frame->prepare = prepare_nop;
2731 frame->check = slf_check_nop;
2732 }
2733 else
2734 {
2735 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2736
2737 av_push (av, waiter);
2738
2739 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2740 frame->prepare = prepare_schedule;
2741 frame->check = slf_check_signal_wait;
2742 }
2743}
2744
2745/*****************************************************************************/
2746/* Coro::AIO */
2747
2748#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2749
2750/* helper storage struct */
2751struct io_state
2752{
2753 int errorno;
2754 I32 laststype; /* U16 in 5.10.0 */
2755 int laststatval;
2756 Stat_t statcache;
2757};
2758
2759static void
2760coro_aio_callback (pTHX_ CV *cv)
2761{
2762 dXSARGS;
2763 AV *state = (AV *)GENSUB_ARG;
2764 SV *coro = av_pop (state);
2765 SV *data_sv = newSV (sizeof (struct io_state));
2766
2767 av_extend (state, items - 1);
2768
2769 sv_upgrade (data_sv, SVt_PV);
2770 SvCUR_set (data_sv, sizeof (struct io_state));
2771 SvPOK_only (data_sv);
2772
2773 {
2774 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2775
2776 data->errorno = errno;
2777 data->laststype = PL_laststype;
2778 data->laststatval = PL_laststatval;
2779 data->statcache = PL_statcache;
2780 }
2781
2782 /* now build the result vector out of all the parameters and the data_sv */
2783 {
2784 int i;
2785
2786 for (i = 0; i < items; ++i)
2787 av_push (state, SvREFCNT_inc_NN (ST (i)));
2788 }
2789
2790 av_push (state, data_sv);
2791
2792 api_ready (aTHX_ coro);
2793 SvREFCNT_dec (coro);
2794 SvREFCNT_dec ((AV *)state);
2795}
2796
2797static int
2798slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2799{
2800 AV *state = (AV *)frame->data;
2801
2802 /* if we are about to throw, return early */
2803 /* this does not cancel the aio request, but at least */
2804 /* it quickly returns */
2805 if (CORO_THROW)
2806 return 0;
2807
2808 /* one element that is an RV? repeat! */
2809 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2810 return 1;
2811
2812 /* restore status */
2813 {
2814 SV *data_sv = av_pop (state);
2815 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2816
2817 errno = data->errorno;
2818 PL_laststype = data->laststype;
2819 PL_laststatval = data->laststatval;
2820 PL_statcache = data->statcache;
2821
2822 SvREFCNT_dec (data_sv);
2823 }
2824
2825 /* push result values */
2826 {
2827 dSP;
2828 int i;
2829
2830 EXTEND (SP, AvFILLp (state) + 1);
2831 for (i = 0; i <= AvFILLp (state); ++i)
2832 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2833
2834 PUTBACK;
2835 }
2836
2837 return 0;
2838}
2839
2840static void
2841slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2842{
2843 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
2844 SV *coro_hv = SvRV (coro_current);
2845 struct coro *coro = SvSTATE_hv (coro_hv);
2846
2847 /* put our coroutine id on the state arg */
2848 av_push (state, SvREFCNT_inc_NN (coro_hv));
2849
2850 /* first see whether we have a non-zero priority and set it as AIO prio */
2851 if (coro->prio)
2852 {
2853 dSP;
2854
2855 static SV *prio_cv;
2856 static SV *prio_sv;
2857
2858 if (expect_false (!prio_cv))
2859 {
2860 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2861 prio_sv = newSViv (0);
2862 }
2863
2864 PUSHMARK (SP);
2865 sv_setiv (prio_sv, coro->prio);
2866 XPUSHs (prio_sv);
2867
2868 PUTBACK;
2869 call_sv (prio_cv, G_VOID | G_DISCARD);
2870 }
2871
2872 /* now call the original request */
2873 {
2874 dSP;
2875 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2876 int i;
2877
2878 PUSHMARK (SP);
2879
2880 /* first push all args to the stack */
2881 EXTEND (SP, items + 1);
2882
2883 for (i = 0; i < items; ++i)
2884 PUSHs (arg [i]);
2885
2886 /* now push the callback closure */
2887 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2888
2889 /* now call the AIO function - we assume our request is uncancelable */
2890 PUTBACK;
2891 call_sv ((SV *)req, G_VOID | G_DISCARD);
2892 }
2893
2894 /* now that the requets is going, we loop toll we have a result */
2895 frame->data = (void *)state;
2896 frame->prepare = prepare_schedule;
2897 frame->check = slf_check_aio_req;
2898}
2899
2900static void
2901coro_aio_req_xs (pTHX_ CV *cv)
2902{
2903 dXSARGS;
2904
2905 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2906
2907 XSRETURN_EMPTY;
2908}
2909
2910/*****************************************************************************/
2911
2912#if CORO_CLONE
2913# include "clone.c"
2914#endif
2915
990MODULE = Coro::State PACKAGE = Coro::State 2916MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
991 2917
992PROTOTYPES: DISABLE 2918PROTOTYPES: DISABLE
993 2919
994BOOT: 2920BOOT:
995{ 2921{
996#ifdef USE_ITHREADS 2922#ifdef USE_ITHREADS
997 MUTEX_INIT (&coro_mutex); 2923# if CORO_PTHREAD
2924 coro_thx = PERL_GET_CONTEXT;
2925# endif
998#endif 2926#endif
999 BOOT_PAGESIZE; 2927 BOOT_PAGESIZE;
1000 2928
2929 cctx_current = cctx_new_empty ();
2930
2931 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2932 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2933
2934 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2935 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2936 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2937
2938 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2939 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2940 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2941
1001 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2942 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002 2943
1003 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2944 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1004 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2945 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1005 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2946 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
2947 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1006 2948
1007 main_mainstack = PL_mainstack; 2949 main_mainstack = PL_mainstack;
2950 main_top_env = PL_top_env;
1008 2951
2952 while (main_top_env->je_prev)
2953 main_top_env = main_top_env->je_prev;
2954
2955 {
2956 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2957
2958 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2959 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2960
2961 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2962 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2963 }
2964
1009 coroapi.ver = CORO_API_VERSION; 2965 coroapi.ver = CORO_API_VERSION;
2966 coroapi.rev = CORO_API_REVISION;
2967
1010 coroapi.transfer = api_transfer; 2968 coroapi.transfer = api_transfer;
1011 2969
2970 coroapi.sv_state = SvSTATE_;
2971 coroapi.execute_slf = api_execute_slf;
2972 coroapi.prepare_nop = prepare_nop;
2973 coroapi.prepare_schedule = prepare_schedule;
2974 coroapi.prepare_cede = prepare_cede;
2975 coroapi.prepare_cede_notself = prepare_cede_notself;
2976
2977 {
2978 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2979
2980 if (!svp) croak ("Time::HiRes is required");
2981 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2982
2983 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2984 }
2985
1012 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2986 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1013} 2987}
1014 2988
1015SV * 2989SV *
1016new (char *klass, ...) 2990new (char *klass, ...)
2991 ALIAS:
2992 Coro::new = 1
1017 CODE: 2993 CODE:
1018{ 2994{
1019 struct coro *coro; 2995 struct coro *coro;
2996 MAGIC *mg;
1020 HV *hv; 2997 HV *hv;
2998 CV *cb;
1021 int i; 2999 int i;
1022 3000
3001 if (items > 1)
3002 {
3003 cb = coro_sv_2cv (aTHX_ ST (1));
3004
3005 if (!ix)
3006 {
3007 if (CvISXSUB (cb))
3008 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3009
3010 if (!CvROOT (cb))
3011 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3012 }
3013 }
3014
1023 Newz (0, coro, 1, struct coro); 3015 Newz (0, coro, 1, struct coro);
1024 coro->args = newAV (); 3016 coro->args = newAV ();
3017 coro->flags = CF_NEW;
1025 3018
3019 if (coro_first) coro_first->prev = coro;
3020 coro->next = coro_first;
3021 coro_first = coro;
3022
1026 hv = newHV (); 3023 coro->hv = hv = newHV ();
1027 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3024 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3025 mg->mg_flags |= MGf_DUP;
1028 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3026 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029 3027
3028 if (items > 1)
3029 {
3030 av_extend (coro->args, items - 1 + ix - 1);
3031
3032 if (ix)
3033 {
3034 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3035 cb = cv_coro_run;
3036 }
3037
3038 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3039
1030 for (i = 1; i < items; i++) 3040 for (i = 2; i < items; i++)
1031 av_push (coro->args, newSVsv (ST (i))); 3041 av_push (coro->args, newSVsv (ST (i)));
1032 3042 }
1033 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1034 /*coro->stack = 0;*/
1035} 3043}
1036 OUTPUT: 3044 OUTPUT:
1037 RETVAL 3045 RETVAL
1038 3046
1039void 3047void
1040_set_stacklevel (...) 3048transfer (...)
1041 ALIAS: 3049 PROTOTYPE: $$
1042 Coro::State::transfer = 1 3050 CODE:
1043 Coro::schedule = 2 3051 CORO_EXECUTE_SLF_XS (slf_init_transfer);
1044 Coro::cede = 3
1045 Coro::Cont::yield = 4
1046 CODE:
1047{
1048 struct transfer_args ta;
1049 3052
1050 switch (ix) 3053bool
1051 { 3054_destroy (SV *coro_sv)
1052 case 0: 3055 CODE:
1053 ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0))); 3056 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1054 ta.next = 0; 3057 OUTPUT:
1055 ta.flags = TRANSFER_SET_STACKLEVEL; 3058 RETVAL
1056 break;
1057
1058 case 1:
1059 if (items != 3)
1060 croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
1061
1062 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1063 break;
1064
1065 case 2:
1066 prepare_schedule (&ta);
1067 break;
1068
1069 case 3:
1070 prepare_cede (&ta);
1071 break;
1072
1073 case 4:
1074 {
1075 SV *yieldstack;
1076 SV *sv;
1077 AV *defav = GvAV (PL_defgv);
1078
1079 yieldstack = *hv_fetch (
1080 (HV *)SvRV (GvSV (coro_current)),
1081 "yieldstack", sizeof ("yieldstack") - 1,
1082 0
1083 );
1084
1085 /* set up @_ -- ugly */
1086 av_clear (defav);
1087 av_fill (defav, items - 1);
1088 while (items--)
1089 av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091 sv = av_pop ((AV *)SvRV (yieldstack));
1092 ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093 ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094 ta.flags = 0;
1095 SvREFCNT_dec (sv);
1096 }
1097 break;
1098
1099 }
1100
1101 TRANSFER (ta);
1102}
1103 3059
1104void 3060void
1105_clone_state_from (SV *dst, SV *src)
1106 CODE:
1107{
1108 struct coro *coro_src = SvSTATE (src);
1109
1110 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112 ++coro_src->refcnt;
1113 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114}
1115
1116void
1117_nonlocal_goto (IV nextop)
1118 CODE:
1119 /* uuh, somebody will kill me again for this */
1120 PL_op->op_next = INT2PTR (OP *, nextop);
1121
1122void
1123_exit (code) 3061_exit (int code)
1124 int code
1125 PROTOTYPE: $ 3062 PROTOTYPE: $
1126 CODE: 3063 CODE:
1127 _exit (code); 3064 _exit (code);
1128 3065
3066SV *
3067clone (Coro::State coro)
3068 CODE:
3069{
3070#if CORO_CLONE
3071 struct coro *ncoro = coro_clone (aTHX_ coro);
3072 MAGIC *mg;
3073 /* TODO: too much duplication */
3074 ncoro->hv = newHV ();
3075 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3076 mg->mg_flags |= MGf_DUP;
3077 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3078#else
3079 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3080#endif
3081}
3082 OUTPUT:
3083 RETVAL
3084
3085int
3086cctx_stacksize (int new_stacksize = 0)
3087 PROTOTYPE: ;$
3088 CODE:
3089 RETVAL = cctx_stacksize;
3090 if (new_stacksize)
3091 {
3092 cctx_stacksize = new_stacksize;
3093 ++cctx_gen;
3094 }
3095 OUTPUT:
3096 RETVAL
3097
3098int
3099cctx_max_idle (int max_idle = 0)
3100 PROTOTYPE: ;$
3101 CODE:
3102 RETVAL = cctx_max_idle;
3103 if (max_idle > 1)
3104 cctx_max_idle = max_idle;
3105 OUTPUT:
3106 RETVAL
3107
3108int
3109cctx_count ()
3110 PROTOTYPE:
3111 CODE:
3112 RETVAL = cctx_count;
3113 OUTPUT:
3114 RETVAL
3115
3116int
3117cctx_idle ()
3118 PROTOTYPE:
3119 CODE:
3120 RETVAL = cctx_idle;
3121 OUTPUT:
3122 RETVAL
3123
3124void
3125list ()
3126 PROTOTYPE:
3127 PPCODE:
3128{
3129 struct coro *coro;
3130 for (coro = coro_first; coro; coro = coro->next)
3131 if (coro->hv)
3132 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3133}
3134
3135void
3136call (Coro::State coro, SV *coderef)
3137 ALIAS:
3138 eval = 1
3139 CODE:
3140{
3141 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3142 {
3143 struct coro *current = SvSTATE_current;
3144
3145 if (current != coro)
3146 {
3147 PUTBACK;
3148 save_perl (aTHX_ current);
3149 load_perl (aTHX_ coro);
3150 SPAGAIN;
3151 }
3152
3153 PUSHSTACK;
3154
3155 PUSHMARK (SP);
3156 PUTBACK;
3157
3158 if (ix)
3159 eval_sv (coderef, 0);
3160 else
3161 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3162
3163 POPSTACK;
3164 SPAGAIN;
3165
3166 if (current != coro)
3167 {
3168 PUTBACK;
3169 save_perl (aTHX_ coro);
3170 load_perl (aTHX_ current);
3171 SPAGAIN;
3172 }
3173 }
3174}
3175
3176SV *
3177is_ready (Coro::State coro)
3178 PROTOTYPE: $
3179 ALIAS:
3180 is_ready = CF_READY
3181 is_running = CF_RUNNING
3182 is_new = CF_NEW
3183 is_destroyed = CF_DESTROYED
3184 is_suspended = CF_SUSPENDED
3185 CODE:
3186 RETVAL = boolSV (coro->flags & ix);
3187 OUTPUT:
3188 RETVAL
3189
3190void
3191throw (Coro::State self, SV *throw = &PL_sv_undef)
3192 PROTOTYPE: $;$
3193 CODE:
3194{
3195 struct coro *current = SvSTATE_current;
3196 SV **throwp = self == current ? &CORO_THROW : &self->except;
3197 SvREFCNT_dec (*throwp);
3198 SvGETMAGIC (throw);
3199 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3200}
3201
3202void
3203api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3204 PROTOTYPE: $;$
3205 C_ARGS: aTHX_ coro, flags
3206
3207SV *
3208has_cctx (Coro::State coro)
3209 PROTOTYPE: $
3210 CODE:
3211 /* maybe manage the running flag differently */
3212 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3213 OUTPUT:
3214 RETVAL
3215
3216int
3217is_traced (Coro::State coro)
3218 PROTOTYPE: $
3219 CODE:
3220 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3221 OUTPUT:
3222 RETVAL
3223
3224UV
3225rss (Coro::State coro)
3226 PROTOTYPE: $
3227 ALIAS:
3228 usecount = 1
3229 CODE:
3230 switch (ix)
3231 {
3232 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3233 case 1: RETVAL = coro->usecount; break;
3234 }
3235 OUTPUT:
3236 RETVAL
3237
3238void
3239force_cctx ()
3240 PROTOTYPE:
3241 CODE:
3242 cctx_current->idle_sp = 0;
3243
3244void
3245swap_defsv (Coro::State self)
3246 PROTOTYPE: $
3247 ALIAS:
3248 swap_defav = 1
3249 CODE:
3250 if (!self->slot)
3251 croak ("cannot swap state with coroutine that has no saved state,");
3252 else
3253 {
3254 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3255 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3256
3257 SV *tmp = *src; *src = *dst; *dst = tmp;
3258 }
3259
3260void
3261cancel (Coro::State self)
3262 CODE:
3263 coro_state_destroy (aTHX_ self);
3264 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3265
3266
1129MODULE = Coro::State PACKAGE = Coro 3267MODULE = Coro::State PACKAGE = Coro
1130 3268
1131BOOT: 3269BOOT:
1132{ 3270{
1133 int i; 3271 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3272 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3273 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3274 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3275 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3276 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3277 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3278 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3279 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
1134 3280
3281 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3282 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3283 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3284 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3285
1135 coro_stash = gv_stashpv ("Coro", TRUE); 3286 coro_stash = gv_stashpv ("Coro", TRUE);
1136 3287
1137 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3288 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1138 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3289 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1139 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3290 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1140 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3291 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1141 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3292 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1142 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3293 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1143
1144 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1145 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1146
1147 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148 coro_ready[i] = newAV ();
1149 3294
1150 { 3295 {
1151 SV *sv = perl_get_sv("Coro::API", 1); 3296 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1152 3297
1153 coroapi.schedule = api_schedule; 3298 coroapi.schedule = api_schedule;
3299 coroapi.schedule_to = api_schedule_to;
1154 coroapi.cede = api_cede; 3300 coroapi.cede = api_cede;
3301 coroapi.cede_notself = api_cede_notself;
1155 coroapi.ready = api_ready; 3302 coroapi.ready = api_ready;
3303 coroapi.is_ready = api_is_ready;
1156 coroapi.nready = &coro_nready; 3304 coroapi.nready = coro_nready;
1157 coroapi.current = coro_current; 3305 coroapi.current = coro_current;
1158 3306
1159 GCoroAPI = &coroapi; 3307 /*GCoroAPI = &coroapi;*/
1160 sv_setiv (sv, (IV)&coroapi); 3308 sv_setiv (sv, (IV)&coroapi);
1161 SvREADONLY_on (sv); 3309 SvREADONLY_on (sv);
1162 } 3310 }
1163} 3311}
1164 3312
3313void
3314terminate (...)
3315 CODE:
3316 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3317
3318void
3319schedule (...)
3320 CODE:
3321 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3322
3323void
3324schedule_to (...)
3325 CODE:
3326 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3327
3328void
3329cede_to (...)
3330 CODE:
3331 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3332
3333void
3334cede (...)
3335 CODE:
3336 CORO_EXECUTE_SLF_XS (slf_init_cede);
3337
3338void
3339cede_notself (...)
3340 CODE:
3341 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3342
3343void
3344_set_current (SV *current)
3345 PROTOTYPE: $
3346 CODE:
3347 SvREFCNT_dec (SvRV (coro_current));
3348 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3349
3350void
3351_set_readyhook (SV *hook)
3352 PROTOTYPE: $
3353 CODE:
3354 SvREFCNT_dec (coro_readyhook);
3355 SvGETMAGIC (hook);
3356 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
3357
1165int 3358int
1166prio (Coro::State coro, int newprio = 0) 3359prio (Coro::State coro, int newprio = 0)
3360 PROTOTYPE: $;$
1167 ALIAS: 3361 ALIAS:
1168 nice = 1 3362 nice = 1
1169 CODE: 3363 CODE:
1170{ 3364{
1171 RETVAL = coro->prio; 3365 RETVAL = coro->prio;
1172 3366
1173 if (items > 1) 3367 if (items > 1)
1174 { 3368 {
1175 if (ix) 3369 if (ix)
1176 newprio += coro->prio; 3370 newprio = coro->prio - newprio;
1177 3371
1178 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3372 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3373 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180 3374
1181 coro->prio = newprio; 3375 coro->prio = newprio;
1182 } 3376 }
1183} 3377}
3378 OUTPUT:
3379 RETVAL
1184 3380
1185void 3381SV *
1186ready (SV *self) 3382ready (SV *self)
1187 PROTOTYPE: $ 3383 PROTOTYPE: $
1188 CODE: 3384 CODE:
1189 api_ready (self); 3385 RETVAL = boolSV (api_ready (aTHX_ self));
3386 OUTPUT:
3387 RETVAL
1190 3388
1191int 3389int
1192nready (...) 3390nready (...)
1193 PROTOTYPE: 3391 PROTOTYPE:
1194 CODE: 3392 CODE:
1195 RETVAL = coro_nready; 3393 RETVAL = coro_nready;
1196 OUTPUT: 3394 OUTPUT:
1197 RETVAL 3395 RETVAL
1198 3396
1199MODULE = Coro::State PACKAGE = Coro::AIO 3397void
3398suspend (Coro::State self)
3399 PROTOTYPE: $
3400 CODE:
3401 self->flags |= CF_SUSPENDED;
3402
3403void
3404resume (Coro::State self)
3405 PROTOTYPE: $
3406 CODE:
3407 self->flags &= ~CF_SUSPENDED;
3408
3409void
3410_pool_handler (...)
3411 CODE:
3412 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3413
3414void
3415async_pool (SV *cv, ...)
3416 PROTOTYPE: &@
3417 PPCODE:
3418{
3419 HV *hv = (HV *)av_pop (av_async_pool);
3420 AV *av = newAV ();
3421 SV *cb = ST (0);
3422 int i;
3423
3424 av_extend (av, items - 2);
3425 for (i = 1; i < items; ++i)
3426 av_push (av, SvREFCNT_inc_NN (ST (i)));
3427
3428 if ((SV *)hv == &PL_sv_undef)
3429 {
3430 PUSHMARK (SP);
3431 EXTEND (SP, 2);
3432 PUSHs (sv_Coro);
3433 PUSHs ((SV *)cv_pool_handler);
3434 PUTBACK;
3435 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3436 SPAGAIN;
3437
3438 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3439 }
3440
3441 {
3442 struct coro *coro = SvSTATE_hv (hv);
3443
3444 assert (!coro->invoke_cb);
3445 assert (!coro->invoke_av);
3446 coro->invoke_cb = SvREFCNT_inc (cb);
3447 coro->invoke_av = av;
3448 }
3449
3450 api_ready (aTHX_ (SV *)hv);
3451
3452 if (GIMME_V != G_VOID)
3453 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3454 else
3455 SvREFCNT_dec (hv);
3456}
1200 3457
1201SV * 3458SV *
1202_get_state () 3459rouse_cb ()
3460 PROTOTYPE:
1203 CODE: 3461 CODE:
1204{ 3462 RETVAL = coro_new_rouse_cb (aTHX);
1205 struct {
1206 int errorno;
1207 int laststype;
1208 int laststatval;
1209 Stat_t statcache;
1210 } data;
1211
1212 data.errorno = errno;
1213 data.laststype = PL_laststype;
1214 data.laststatval = PL_laststatval;
1215 data.statcache = PL_statcache;
1216
1217 RETVAL = newSVpvn ((char *)&data, sizeof data);
1218}
1219 OUTPUT: 3463 OUTPUT:
1220 RETVAL 3464 RETVAL
1221 3465
1222void 3466void
1223_set_state (char *data_) 3467rouse_wait (...)
3468 PROTOTYPE: ;$
3469 PPCODE:
3470 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3471
3472void
3473on_enter (SV *block)
3474 ALIAS:
3475 on_leave = 1
1224 PROTOTYPE: $ 3476 PROTOTYPE: &
1225 CODE: 3477 CODE:
1226{ 3478{
1227 struct { 3479 struct coro *coro = SvSTATE_current;
3480 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3481
3482 block = (SV *)coro_sv_2cv (aTHX_ block);
3483
3484 if (!*avp)
3485 *avp = newAV ();
3486
3487 av_push (*avp, SvREFCNT_inc (block));
3488
3489 if (!ix)
3490 on_enterleave_call (aTHX_ block);
3491
3492 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3493 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3494 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3495}
3496
3497
3498MODULE = Coro::State PACKAGE = PerlIO::cede
3499
3500BOOT:
3501 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3502
3503
3504MODULE = Coro::State PACKAGE = Coro::Semaphore
3505
3506SV *
3507new (SV *klass, SV *count = 0)
3508 CODE:
3509{
3510 int semcnt = 1;
3511
3512 if (count)
3513 {
3514 SvGETMAGIC (count);
3515
3516 if (SvOK (count))
3517 semcnt = SvIV (count);
3518 }
3519
3520 RETVAL = sv_bless (
3521 coro_waitarray_new (aTHX_ semcnt),
3522 GvSTASH (CvGV (cv))
3523 );
3524}
3525 OUTPUT:
3526 RETVAL
3527
3528# helper for Coro::Channel and others
3529SV *
3530_alloc (int count)
3531 CODE:
3532 RETVAL = coro_waitarray_new (aTHX_ count);
3533 OUTPUT:
3534 RETVAL
3535
3536SV *
3537count (SV *self)
3538 CODE:
3539 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3540 OUTPUT:
3541 RETVAL
3542
3543void
3544up (SV *self, int adjust = 1)
3545 ALIAS:
3546 adjust = 1
3547 CODE:
3548 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3549
3550void
3551down (...)
3552 CODE:
3553 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3554
3555void
3556wait (...)
3557 CODE:
3558 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3559
3560void
3561try (SV *self)
3562 PPCODE:
3563{
3564 AV *av = (AV *)SvRV (self);
3565 SV *count_sv = AvARRAY (av)[0];
3566 IV count = SvIVX (count_sv);
3567
3568 if (count > 0)
3569 {
3570 --count;
3571 SvIVX (count_sv) = count;
3572 XSRETURN_YES;
3573 }
3574 else
3575 XSRETURN_NO;
3576}
3577
3578void
3579waiters (SV *self)
3580 PPCODE:
3581{
3582 AV *av = (AV *)SvRV (self);
3583 int wcount = AvFILLp (av) + 1 - 1;
3584
3585 if (GIMME_V == G_SCALAR)
3586 XPUSHs (sv_2mortal (newSViv (wcount)));
3587 else
3588 {
1228 int errorno; 3589 int i;
1229 int laststype; 3590 EXTEND (SP, wcount);
1230 int laststatval; 3591 for (i = 1; i <= wcount; ++i)
1231 Stat_t statcache; 3592 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1232 } *data = (void *)data_; 3593 }
1233
1234 errno = data->errorno;
1235 PL_laststype = data->laststype;
1236 PL_laststatval = data->laststatval;
1237 PL_statcache = data->statcache;
1238} 3594}
3595
3596MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3597
3598void
3599_may_delete (SV *sem, int count, int extra_refs)
3600 PPCODE:
3601{
3602 AV *av = (AV *)SvRV (sem);
3603
3604 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3605 && AvFILLp (av) == 0 /* no waiters, just count */
3606 && SvIV (AvARRAY (av)[0]) == count)
3607 XSRETURN_YES;
3608
3609 XSRETURN_NO;
3610}
3611
3612MODULE = Coro::State PACKAGE = Coro::Signal
3613
3614SV *
3615new (SV *klass)
3616 CODE:
3617 RETVAL = sv_bless (
3618 coro_waitarray_new (aTHX_ 0),
3619 GvSTASH (CvGV (cv))
3620 );
3621 OUTPUT:
3622 RETVAL
3623
3624void
3625wait (...)
3626 CODE:
3627 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3628
3629void
3630broadcast (SV *self)
3631 CODE:
3632{
3633 AV *av = (AV *)SvRV (self);
3634 coro_signal_wake (aTHX_ av, AvFILLp (av));
3635}
3636
3637void
3638send (SV *self)
3639 CODE:
3640{
3641 AV *av = (AV *)SvRV (self);
3642
3643 if (AvFILLp (av))
3644 coro_signal_wake (aTHX_ av, 1);
3645 else
3646 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3647}
3648
3649IV
3650awaited (SV *self)
3651 CODE:
3652 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3653 OUTPUT:
3654 RETVAL
3655
3656
3657MODULE = Coro::State PACKAGE = Coro::AnyEvent
3658
3659BOOT:
3660 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3661
3662void
3663_schedule (...)
3664 CODE:
3665{
3666 static int incede;
3667
3668 api_cede_notself (aTHX);
3669
3670 ++incede;
3671 while (coro_nready >= incede && api_cede (aTHX))
3672 ;
3673
3674 sv_setsv (sv_activity, &PL_sv_undef);
3675 if (coro_nready >= incede)
3676 {
3677 PUSHMARK (SP);
3678 PUTBACK;
3679 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3680 }
3681
3682 --incede;
3683}
3684
3685
3686MODULE = Coro::State PACKAGE = Coro::AIO
3687
3688void
3689_register (char *target, char *proto, SV *req)
3690 CODE:
3691{
3692 CV *req_cv = coro_sv_2cv (aTHX_ req);
3693 /* newXSproto doesn't return the CV on 5.8 */
3694 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3695 sv_setpv ((SV *)slf_cv, proto);
3696 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3697}
3698

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