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Comparing Coro/Coro/State.xs (file contents):
Revision 1.87 by root, Fri Nov 24 13:40:36 2006 UTC vs.
Revision 1.359 by root, Mon Jun 29 05:07:19 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 <errno.h> 83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#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
33 114
34#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64 115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35# undef STACKGUARD 116# undef CORO_STACKGUARD
36#endif 117#endif
37 118
38#ifndef STACKGUARD 119#ifndef CORO_STACKGUARD
39# define STACKGUARD 0 120# define CORO_STACKGUARD 0
40#endif
41
42#ifdef HAVE_MMAP
43# include <unistd.h>
44# include <sys/mman.h>
45# ifndef MAP_ANONYMOUS
46# ifdef MAP_ANON
47# define MAP_ANONYMOUS MAP_ANON
48# else
49# undef HAVE_MMAP
50# endif 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;
51# endif 161# endif
52# include <limits.h> 162#endif
53# ifndef PAGESIZE 163
54# define PAGESIZE pagesize 164#ifdef __linux
55# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE) 165# include <time.h> /* for timespec */
56static long pagesize; 166# include <syscall.h> /* for SYS_* */
57# else 167# ifdef SYS_clock_gettime
58# 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
59# endif 171# endif
60#endif 172#endif
61 173
62#define SUB_INIT "Coro::State::initialize" 174static double (*nvtime)(); /* so why doesn't it take void? */
63#define UCORO_STATE "_coro_state"
64 175
65/* The next macro should declare a variable stacklevel that contains and approximation 176/* we hijack an hopefully unused CV flag for our purposes */
66 * to the current C stack pointer. Its property is that it changes with each call 177#define CVf_SLF 0x4000
67 * and should be unique. */ 178static OP *pp_slf (pTHX);
68#define dSTACKLEVEL void *stacklevel = &stacklevel
69 179
70#define IN_DESTRUCT (PL_main_cv == Nullcv) 180static U32 cctx_gen;
71 181static size_t cctx_stacksize = CORO_STACKSIZE;
72#define labs(l) ((l) >= 0 ? (l) : -(l))
73
74#include "CoroAPI.h"
75
76#ifdef USE_ITHREADS
77static perl_mutex coro_mutex;
78# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80#else
81# define LOCK (void)0
82# define UNLOCK (void)0
83#endif
84
85static struct CoroAPI coroapi; 182static struct CoroAPI coroapi;
86static 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;
87static HV *coro_state_stash; 185static HV *coro_state_stash, *coro_stash;
88static SV *ucoro_state_sv;
89static U32 ucoro_state_hash;
90static SV *coro_mortal; /* will be freed after next transfer */ 186static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
91 187
92/* this is actually not only the c stack but also c registers etc... */ 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
210/* enable processtime/realtime profiling */
211static char profile_times;
212typedef U32 coro_ts[2];
213
214static struct coro_cctx *cctx_first;
215static int cctx_count, cctx_idle;
216
217enum {
218 CC_MAPPED = 0x01,
219 CC_NOREUSE = 0x02, /* throw this away after tracing */
220 CC_TRACE = 0x04,
221 CC_TRACE_SUB = 0x08, /* trace sub calls */
222 CC_TRACE_LINE = 0x10, /* trace each statement */
223 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
224};
225
226/* this is a structure representing a c-level coroutine */
93typedef struct { 227typedef struct coro_cctx
94 int refcnt; /* pointer reference counter */ 228{
95 int usecnt; /* shared by how many coroutines */ 229 struct coro_cctx *next;
96 int gencnt; /* generation counter */
97 230
231 /* the stack */
232 void *sptr;
233 size_t ssize;
234
235 /* cpu state */
236 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
237 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
238 JMPENV *top_env;
98 coro_context cctx; 239 coro_context cctx;
99 240
100 void *sptr; 241 U32 gen;
101 long ssize; /* positive == mmap, otherwise malloc */ 242#if CORO_USE_VALGRIND
102} coro_stack; 243 int valgrind_id;
244#endif
245 unsigned char flags;
246} coro_cctx;
103 247
248coro_cctx *cctx_current; /* the currently running cctx */
249
250/*****************************************************************************/
251
252enum {
253 CF_RUNNING = 0x0001, /* coroutine is running */
254 CF_READY = 0x0002, /* coroutine is ready */
255 CF_NEW = 0x0004, /* has never been switched to */
256 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
257 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
258};
259
260/* the structure where most of the perl state is stored, overlaid on the cxstack */
261typedef struct
262{
263 SV *defsv;
264 AV *defav;
265 SV *errsv;
266 SV *irsgv;
267 HV *hinthv;
268#define VAR(name,type) type name;
269# include "state.h"
270#undef VAR
271} perl_slots;
272
273#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
274
275/* this is a structure representing a perl-level coroutine */
104struct coro { 276struct coro {
105 /* the optional C context */ 277 /* the C coroutine allocated to this perl coroutine, if any */
106 coro_stack *stack; 278 coro_cctx *cctx;
107 void *cursp;
108 int gencnt;
109 279
110 /* optionally saved, might be zero */ 280 /* ready queue */
111 AV *defav; 281 struct coro *next_ready;
112 SV *defsv;
113 SV *errsv;
114
115 /* saved global state not related to stacks */
116 U8 dowarn;
117 I32 in_eval;
118 282
119 /* the stacks and related info (callchain etc..) */ 283 /* state data */
120 PERL_SI *curstackinfo; 284 struct CoroSLF slf_frame; /* saved slf frame */
121 AV *curstack;
122 AV *mainstack; 285 AV *mainstack;
123 SV **stack_sp; 286 perl_slots *slot; /* basically the saved sp */
124 OP *op; 287
125 SV **curpad; 288 CV *startcv; /* the CV to execute */
126 AV *comppad; 289 AV *args; /* data associated with this coroutine (initial args) */
127 CV *compcv; 290 int refcnt; /* coroutines are refcounted, yes */
128 SV **stack_base; 291 int flags; /* CF_ flags */
129 SV **stack_max; 292 HV *hv; /* the perl hash associated with this coro, if any */
130 SV **tmps_stack; 293 void (*on_destroy)(pTHX_ struct coro *coro);
131 I32 tmps_floor; 294
132 I32 tmps_ix; 295 /* statistics */
133 I32 tmps_max; 296 int usecount; /* number of transfers to this coro */
134 I32 *markstack;
135 I32 *markstack_ptr;
136 I32 *markstack_max;
137 I32 *scopestack;
138 I32 scopestack_ix;
139 I32 scopestack_max;
140 ANY *savestack;
141 I32 savestack_ix;
142 I32 savestack_max;
143 OP **retstack;
144 I32 retstack_ix;
145 I32 retstack_max;
146 PMOP *curpm;
147 COP *curcop;
148 JMPENV *top_env;
149 297
150 /* coro process data */ 298 /* coro process data */
151 int prio; 299 int prio;
300 SV *except; /* exception to be thrown */
301 SV *rouse_cb;
152 302
153 /* data associated with this coroutine (initial args) */ 303 /* async_pool */
154 AV *args; 304 SV *saved_deffh;
155 int refcnt; 305 SV *invoke_cb;
306 AV *invoke_av;
307
308 /* on_enter/on_leave */
309 AV *on_enter;
310 AV *on_leave;
311
312 /* linked list */
313 struct coro *next, *prev;
156}; 314};
157 315
158typedef struct coro *Coro__State; 316typedef struct coro *Coro__State;
159typedef struct coro *Coro__State_or_hashref; 317typedef struct coro *Coro__State_or_hashref;
160 318
319/* the following variables are effectively part of the perl context */
320/* and get copied between struct coro and these variables */
321/* the mainr easonw e don't support windows process emulation */
322static struct CoroSLF slf_frame; /* the current slf frame */
323
324/** Coro ********************************************************************/
325
326#define CORO_PRIO_MAX 3
327#define CORO_PRIO_HIGH 1
328#define CORO_PRIO_NORMAL 0
329#define CORO_PRIO_LOW -1
330#define CORO_PRIO_IDLE -3
331#define CORO_PRIO_MIN -4
332
333/* for Coro.pm */
334static SV *coro_current;
335static SV *coro_readyhook;
336static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
337static CV *cv_coro_run, *cv_coro_terminate;
338static struct coro *coro_first;
339#define coro_nready coroapi.nready
340
341/** lowlevel stuff **********************************************************/
342
343static SV *
344coro_get_sv (pTHX_ const char *name, int create)
345{
346#if PERL_VERSION_ATLEAST (5,10,0)
347 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
348 get_sv (name, create);
349#endif
350 return get_sv (name, create);
351}
352
161static AV * 353static AV *
354coro_get_av (pTHX_ const char *name, int create)
355{
356#if PERL_VERSION_ATLEAST (5,10,0)
357 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
358 get_av (name, create);
359#endif
360 return get_av (name, create);
361}
362
363static HV *
364coro_get_hv (pTHX_ const char *name, int create)
365{
366#if PERL_VERSION_ATLEAST (5,10,0)
367 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
368 get_hv (name, create);
369#endif
370 return get_hv (name, create);
371}
372
373/* may croak */
374INLINE CV *
375coro_sv_2cv (pTHX_ SV *sv)
376{
377 HV *st;
378 GV *gvp;
379 CV *cv = sv_2cv (sv, &st, &gvp, 0);
380
381 if (!cv)
382 croak ("code reference expected");
383
384 return cv;
385}
386
387/*****************************************************************************/
388/* magic glue */
389
390#define CORO_MAGIC_type_cv 26
391#define CORO_MAGIC_type_state PERL_MAGIC_ext
392
393#define CORO_MAGIC_NN(sv, type) \
394 (expect_true (SvMAGIC (sv)->mg_type == type) \
395 ? SvMAGIC (sv) \
396 : mg_find (sv, type))
397
398#define CORO_MAGIC(sv, type) \
399 (expect_true (SvMAGIC (sv)) \
400 ? CORO_MAGIC_NN (sv, type) \
401 : 0)
402
403#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
404#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
405
406INLINE struct coro *
407SvSTATE_ (pTHX_ SV *coro)
408{
409 HV *stash;
410 MAGIC *mg;
411
412 if (SvROK (coro))
413 coro = SvRV (coro);
414
415 if (expect_false (SvTYPE (coro) != SVt_PVHV))
416 croak ("Coro::State object required");
417
418 stash = SvSTASH (coro);
419 if (expect_false (stash != coro_stash && stash != coro_state_stash))
420 {
421 /* very slow, but rare, check */
422 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
423 croak ("Coro::State object required");
424 }
425
426 mg = CORO_MAGIC_state (coro);
427 return (struct coro *)mg->mg_ptr;
428}
429
430#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
431
432/* faster than SvSTATE, but expects a coroutine hv */
433#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
434#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
435
436/*****************************************************************************/
437/* padlist management and caching */
438
439static AV *
162coro_clone_padlist (pTHX_ CV *cv) 440coro_derive_padlist (pTHX_ CV *cv)
163{ 441{
164 AV *padlist = CvPADLIST (cv); 442 AV *padlist = CvPADLIST (cv);
165 AV *newpadlist, *newpad; 443 AV *newpadlist, *newpad;
166 444
167 newpadlist = newAV (); 445 newpadlist = newAV ();
168 AvREAL_off (newpadlist); 446 AvREAL_off (newpadlist);
169#if PERL_VERSION < 9 447#if PERL_VERSION_ATLEAST (5,10,0)
448 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
449#else
170 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 450 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171#else
172 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173#endif 451#endif
174 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 452 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175 --AvFILLp (padlist); 453 --AvFILLp (padlist);
176 454
177 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 455 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
178 av_store (newpadlist, 1, (SV *)newpad); 456 av_store (newpadlist, 1, (SV *)newpad);
179 457
180 return newpadlist; 458 return newpadlist;
181} 459}
182 460
183static void 461static void
184free_padlist (pTHX_ AV *padlist) 462free_padlist (pTHX_ AV *padlist)
185{ 463{
186 /* may be during global destruction */ 464 /* may be during global destruction */
187 if (SvREFCNT (padlist)) 465 if (!IN_DESTRUCT)
188 { 466 {
189 I32 i = AvFILLp (padlist); 467 I32 i = AvFILLp (padlist);
190 while (i >= 0) 468
469 while (i > 0) /* special-case index 0 */
191 { 470 {
192 SV **svp = av_fetch (padlist, i--, FALSE); 471 /* we try to be extra-careful here */
193 if (svp) 472 AV *av = (AV *)AvARRAY (padlist)[i--];
194 { 473 I32 j = AvFILLp (av);
195 SV *sv; 474
196 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp))) 475 while (j >= 0)
476 SvREFCNT_dec (AvARRAY (av)[j--]);
477
478 AvFILLp (av) = -1;
197 SvREFCNT_dec (sv); 479 SvREFCNT_dec (av);
198
199 SvREFCNT_dec (*svp);
200 }
201 } 480 }
202 481
482 SvREFCNT_dec (AvARRAY (padlist)[0]);
483
484 AvFILLp (padlist) = -1;
203 SvREFCNT_dec ((SV*)padlist); 485 SvREFCNT_dec ((SV*)padlist);
204 } 486 }
205} 487}
206 488
207static int 489static int
208coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 490coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
209{ 491{
210 AV *padlist; 492 AV *padlist;
211 AV *av = (AV *)mg->mg_obj; 493 AV *av = (AV *)mg->mg_obj;
494
495 /* perl manages to free our internal AV and _then_ call us */
496 if (IN_DESTRUCT)
497 return;
212 498
213 /* casting is fun. */ 499 /* casting is fun. */
214 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 500 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215 free_padlist (aTHX_ padlist); 501 free_padlist (aTHX_ padlist);
216 502
217 SvREFCNT_dec (av); 503 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
218 504
219 return 0; 505 return 0;
220} 506}
221 507
222#define PERL_MAGIC_coro PERL_MAGIC_ext 508static MGVTBL coro_cv_vtbl = {
223 509 0, 0, 0, 0,
224static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 510 coro_cv_free
511};
225 512
226/* the next two functions merely cache the padlists */ 513/* the next two functions merely cache the padlists */
227static void 514static void
228get_padlist (pTHX_ CV *cv) 515get_padlist (pTHX_ CV *cv)
229{ 516{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 517 MAGIC *mg = CORO_MAGIC_cv (cv);
518 AV *av;
231 519
232 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 520 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
233 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 521 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234 else 522 else
235 { 523 {
236#if 0 524#if CORO_PREFER_PERL_FUNCTIONS
237 /* this should work - but it doesn't :( */ 525 /* this is probably cleaner? but also slower! */
526 /* in practise, it seems to be less stable */
238 CV *cp = Perl_cv_clone (aTHX_ cv); 527 CV *cp = Perl_cv_clone (aTHX_ cv);
239 CvPADLIST (cv) = CvPADLIST (cp); 528 CvPADLIST (cv) = CvPADLIST (cp);
240 CvPADLIST (cp) = 0; 529 CvPADLIST (cp) = 0;
241 SvREFCNT_dec (cp); 530 SvREFCNT_dec (cp);
242#else 531#else
243 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 532 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
244#endif 533#endif
245 } 534 }
246} 535}
247 536
248static void 537static void
249put_padlist (pTHX_ CV *cv) 538put_padlist (pTHX_ CV *cv)
250{ 539{
251 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 540 MAGIC *mg = CORO_MAGIC_cv (cv);
541 AV *av;
252 542
253 if (!mg) 543 if (expect_false (!mg))
254 { 544 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
255 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257 mg->mg_virtual = &vtbl_coro;
258 mg->mg_obj = (SV *)newAV ();
259 }
260 545
261 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 546 av = (AV *)mg->mg_obj;
262}
263 547
264#define SB do { 548 if (expect_false (AvFILLp (av) >= AvMAX (av)))
265#define SE } while (0) 549 av_extend (av, AvFILLp (av) + 1);
266 550
267#define LOAD(state) load_state(aTHX_ (state)); 551 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
268#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 552}
269 553
270#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 554/** load & save, init *******************************************************/
271 555
272static void 556static void
557on_enterleave_call (pTHX_ SV *cb);
558
559static void
273load_state(pTHX_ Coro__State c) 560load_perl (pTHX_ Coro__State c)
274{ 561{
275 PL_dowarn = c->dowarn; 562 perl_slots *slot = c->slot;
276 PL_in_eval = c->in_eval; 563 c->slot = 0;
277 564
278 PL_curstackinfo = c->curstackinfo;
279 PL_curstack = c->curstack;
280 PL_mainstack = c->mainstack; 565 PL_mainstack = c->mainstack;
281 PL_stack_sp = c->stack_sp;
282 PL_op = c->op;
283 PL_curpad = c->curpad;
284 PL_comppad = c->comppad;
285 PL_compcv = c->compcv;
286 PL_stack_base = c->stack_base;
287 PL_stack_max = c->stack_max;
288 PL_tmps_stack = c->tmps_stack;
289 PL_tmps_floor = c->tmps_floor;
290 PL_tmps_ix = c->tmps_ix;
291 PL_tmps_max = c->tmps_max;
292 PL_markstack = c->markstack;
293 PL_markstack_ptr = c->markstack_ptr;
294 PL_markstack_max = c->markstack_max;
295 PL_scopestack = c->scopestack;
296 PL_scopestack_ix = c->scopestack_ix;
297 PL_scopestack_max = c->scopestack_max;
298 PL_savestack = c->savestack;
299 PL_savestack_ix = c->savestack_ix;
300 PL_savestack_max = c->savestack_max;
301#if PERL_VERSION < 9
302 PL_retstack = c->retstack;
303 PL_retstack_ix = c->retstack_ix;
304 PL_retstack_max = c->retstack_max;
305#endif
306 PL_curpm = c->curpm;
307 PL_curcop = c->curcop;
308 PL_top_env = c->top_env;
309 566
310 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 567 GvSV (PL_defgv) = slot->defsv;
311 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 568 GvAV (PL_defgv) = slot->defav;
312 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 569 GvSV (PL_errgv) = slot->errsv;
570 GvSV (irsgv) = slot->irsgv;
571 GvHV (PL_hintgv) = slot->hinthv;
572
573 #define VAR(name,type) PL_ ## name = slot->name;
574 # include "state.h"
575 #undef VAR
313 576
314 { 577 {
315 dSP; 578 dSP;
579
316 CV *cv; 580 CV *cv;
317 581
318 /* now do the ugly restore mess */ 582 /* now do the ugly restore mess */
319 while ((cv = (CV *)POPs)) 583 while (expect_true (cv = (CV *)POPs))
320 { 584 {
321 AV *padlist = (AV *)POPs;
322
323 if (padlist)
324 {
325 put_padlist (aTHX_ cv); /* mark this padlist as available */ 585 put_padlist (aTHX_ cv); /* mark this padlist as available */
326 CvPADLIST(cv) = padlist; 586 CvDEPTH (cv) = PTR2IV (POPs);
327 } 587 CvPADLIST (cv) = (AV *)POPs;
328
329 ++CvDEPTH(cv);
330 } 588 }
331 589
332 PUTBACK; 590 PUTBACK;
333 } 591 }
334}
335 592
593 slf_frame = c->slf_frame;
594 CORO_THROW = c->except;
595
596 if (expect_false (c->on_enter))
597 {
598 int i;
599
600 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
601 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
602 }
603}
604
336static void 605static void
337save_state(pTHX_ Coro__State c, int flags) 606save_perl (pTHX_ Coro__State c)
338{ 607{
608 if (expect_false (c->on_leave))
609 {
610 int i;
611
612 for (i = AvFILLp (c->on_leave); i >= 0; --i)
613 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
614 }
615
616 c->except = CORO_THROW;
617 c->slf_frame = slf_frame;
618
339 { 619 {
340 dSP; 620 dSP;
341 I32 cxix = cxstack_ix; 621 I32 cxix = cxstack_ix;
342 PERL_CONTEXT *ccstk = cxstack; 622 PERL_CONTEXT *ccstk = cxstack;
343 PERL_SI *top_si = PL_curstackinfo; 623 PERL_SI *top_si = PL_curstackinfo;
… …
345 /* 625 /*
346 * the worst thing you can imagine happens first - we have to save 626 * the worst thing you can imagine happens first - we have to save
347 * (and reinitialize) all cv's in the whole callchain :( 627 * (and reinitialize) all cv's in the whole callchain :(
348 */ 628 */
349 629
350 PUSHs (Nullsv); 630 XPUSHs (Nullsv);
351 /* this loop was inspired by pp_caller */ 631 /* this loop was inspired by pp_caller */
352 for (;;) 632 for (;;)
353 { 633 {
354 while (cxix >= 0) 634 while (expect_true (cxix >= 0))
355 { 635 {
356 PERL_CONTEXT *cx = &ccstk[cxix--]; 636 PERL_CONTEXT *cx = &ccstk[cxix--];
357 637
358 if (CxTYPE(cx) == CXt_SUB) 638 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
359 { 639 {
360 CV *cv = cx->blk_sub.cv; 640 CV *cv = cx->blk_sub.cv;
641
361 if (CvDEPTH(cv)) 642 if (expect_true (CvDEPTH (cv)))
362 { 643 {
363 EXTEND (SP, CvDEPTH(cv)*2); 644 EXTEND (SP, 3);
364
365 while (--CvDEPTH(cv))
366 {
367 /* this tells the restore code to increment CvDEPTH */
368 PUSHs (Nullsv);
369 PUSHs ((SV *)cv);
370 }
371
372 PUSHs ((SV *)CvPADLIST(cv)); 645 PUSHs ((SV *)CvPADLIST (cv));
646 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
373 PUSHs ((SV *)cv); 647 PUSHs ((SV *)cv);
374 648
649 CvDEPTH (cv) = 0;
375 get_padlist (aTHX_ cv); 650 get_padlist (aTHX_ cv);
376 } 651 }
377 } 652 }
378#ifdef CXt_FORMAT
379 else if (CxTYPE(cx) == CXt_FORMAT)
380 {
381 /* I never used formats, so how should I know how these are implemented? */
382 /* my bold guess is as a simple, plain sub... */
383 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384 }
385#endif
386 } 653 }
387 654
388 if (top_si->si_type == PERLSI_MAIN) 655 if (expect_true (top_si->si_type == PERLSI_MAIN))
389 break; 656 break;
390 657
391 top_si = top_si->si_prev; 658 top_si = top_si->si_prev;
392 ccstk = top_si->si_cxstack; 659 ccstk = top_si->si_cxstack;
393 cxix = top_si->si_cxix; 660 cxix = top_si->si_cxix;
394 } 661 }
395 662
396 PUTBACK; 663 PUTBACK;
397 } 664 }
398 665
399 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 666 /* allocate some space on the context stack for our purposes */
400 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 667 /* we manually unroll here, as usually 2 slots is enough */
401 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 668 if (SLOT_COUNT >= 1) CXINC;
669 if (SLOT_COUNT >= 2) CXINC;
670 if (SLOT_COUNT >= 3) CXINC;
671 {
672 int i;
673 for (i = 3; i < SLOT_COUNT; ++i)
674 CXINC;
675 }
676 cxstack_ix -= SLOT_COUNT; /* undo allocation */
402 677
403 c->dowarn = PL_dowarn;
404 c->in_eval = PL_in_eval;
405
406 c->curstackinfo = PL_curstackinfo;
407 c->curstack = PL_curstack;
408 c->mainstack = PL_mainstack; 678 c->mainstack = PL_mainstack;
409 c->stack_sp = PL_stack_sp; 679
410 c->op = PL_op; 680 {
411 c->curpad = PL_curpad; 681 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
412 c->comppad = PL_comppad; 682
413 c->compcv = PL_compcv; 683 slot->defav = GvAV (PL_defgv);
414 c->stack_base = PL_stack_base; 684 slot->defsv = DEFSV;
415 c->stack_max = PL_stack_max; 685 slot->errsv = ERRSV;
416 c->tmps_stack = PL_tmps_stack; 686 slot->irsgv = GvSV (irsgv);
417 c->tmps_floor = PL_tmps_floor; 687 slot->hinthv = GvHV (PL_hintgv);
418 c->tmps_ix = PL_tmps_ix; 688
419 c->tmps_max = PL_tmps_max; 689 #define VAR(name,type) slot->name = PL_ ## name;
420 c->markstack = PL_markstack; 690 # include "state.h"
421 c->markstack_ptr = PL_markstack_ptr; 691 #undef VAR
422 c->markstack_max = PL_markstack_max; 692 }
423 c->scopestack = PL_scopestack;
424 c->scopestack_ix = PL_scopestack_ix;
425 c->scopestack_max = PL_scopestack_max;
426 c->savestack = PL_savestack;
427 c->savestack_ix = PL_savestack_ix;
428 c->savestack_max = PL_savestack_max;
429#if PERL_VERSION < 9
430 c->retstack = PL_retstack;
431 c->retstack_ix = PL_retstack_ix;
432 c->retstack_max = PL_retstack_max;
433#endif
434 c->curpm = PL_curpm;
435 c->curcop = PL_curcop;
436 c->top_env = PL_top_env;
437} 693}
438 694
439/* 695/*
440 * allocate various perl stacks. This is an exact copy 696 * allocate various perl stacks. This is almost an exact copy
441 * of perl.c:init_stacks, except that it uses less memory 697 * of perl.c:init_stacks, except that it uses less memory
442 * on the (sometimes correct) assumption that coroutines do 698 * on the (sometimes correct) assumption that coroutines do
443 * not usually need a lot of stackspace. 699 * not usually need a lot of stackspace.
444 */ 700 */
701#if CORO_PREFER_PERL_FUNCTIONS
702# define coro_init_stacks(thx) init_stacks ()
703#else
445static void 704static void
446coro_init_stacks (pTHX) 705coro_init_stacks (pTHX)
447{ 706{
448 LOCK; 707 PL_curstackinfo = new_stackinfo(32, 8);
449
450 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451 PL_curstackinfo->si_type = PERLSI_MAIN; 708 PL_curstackinfo->si_type = PERLSI_MAIN;
452 PL_curstack = PL_curstackinfo->si_stack; 709 PL_curstack = PL_curstackinfo->si_stack;
453 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 710 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454 711
455 PL_stack_base = AvARRAY(PL_curstack); 712 PL_stack_base = AvARRAY(PL_curstack);
456 PL_stack_sp = PL_stack_base; 713 PL_stack_sp = PL_stack_base;
457 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 714 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458 715
459 New(50,PL_tmps_stack,96,SV*); 716 New(50,PL_tmps_stack,32,SV*);
460 PL_tmps_floor = -1; 717 PL_tmps_floor = -1;
461 PL_tmps_ix = -1; 718 PL_tmps_ix = -1;
462 PL_tmps_max = 96; 719 PL_tmps_max = 32;
463 720
464 New(54,PL_markstack,16,I32); 721 New(54,PL_markstack,16,I32);
465 PL_markstack_ptr = PL_markstack; 722 PL_markstack_ptr = PL_markstack;
466 PL_markstack_max = PL_markstack + 16; 723 PL_markstack_max = PL_markstack + 16;
467 724
468#ifdef SET_MARK_OFFSET 725#ifdef SET_MARK_OFFSET
469 SET_MARK_OFFSET; 726 SET_MARK_OFFSET;
470#endif 727#endif
471 728
472 New(54,PL_scopestack,16,I32); 729 New(54,PL_scopestack,8,I32);
473 PL_scopestack_ix = 0; 730 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16; 731 PL_scopestack_max = 8;
475 732
476 New(54,PL_savestack,96,ANY); 733 New(54,PL_savestack,24,ANY);
477 PL_savestack_ix = 0; 734 PL_savestack_ix = 0;
478 PL_savestack_max = 96; 735 PL_savestack_max = 24;
479 736
480#if PERL_VERSION < 9 737#if !PERL_VERSION_ATLEAST (5,10,0)
481 New(54,PL_retstack,8,OP*); 738 New(54,PL_retstack,4,OP*);
482 PL_retstack_ix = 0; 739 PL_retstack_ix = 0;
483 PL_retstack_max = 8; 740 PL_retstack_max = 4;
484#endif 741#endif
485
486 UNLOCK;
487} 742}
743#endif
488 744
489/* 745/*
490 * destroy the stacks, the callchain etc... 746 * destroy the stacks, the callchain etc...
491 */ 747 */
492static void 748static void
493destroy_stacks(pTHX) 749coro_destruct_stacks (pTHX)
494{ 750{
495 if (!IN_DESTRUCT)
496 {
497 /* is this ugly, I ask? */
498 LEAVE_SCOPE (0);
499
500 /* sure it is, but more important: is it correct?? :/ */
501 FREETMPS;
502
503 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
504 }
505
506 while (PL_curstackinfo->si_next) 751 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 752 PL_curstackinfo = PL_curstackinfo->si_next;
508 753
509 while (PL_curstackinfo) 754 while (PL_curstackinfo)
510 { 755 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 756 PERL_SI *p = PL_curstackinfo->si_prev;
512 757
513 { /*D*//*remove*/
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (!IN_DESTRUCT) 758 if (!IN_DESTRUCT)
520 {
521 dounwind (-1);/*D*//*remove*/
522 SvREFCNT_dec (PL_curstackinfo->si_stack); 759 SvREFCNT_dec (PL_curstackinfo->si_stack);
523 }
524 760
525 Safefree (PL_curstackinfo->si_cxstack); 761 Safefree (PL_curstackinfo->si_cxstack);
526 Safefree (PL_curstackinfo); 762 Safefree (PL_curstackinfo);
527 PL_curstackinfo = p; 763 PL_curstackinfo = p;
528 } 764 }
529 765
530 Safefree (PL_tmps_stack); 766 Safefree (PL_tmps_stack);
531 Safefree (PL_markstack); 767 Safefree (PL_markstack);
532 Safefree (PL_scopestack); 768 Safefree (PL_scopestack);
533 Safefree (PL_savestack); 769 Safefree (PL_savestack);
534#if PERL_VERSION < 9 770#if !PERL_VERSION_ATLEAST (5,10,0)
535 Safefree (PL_retstack); 771 Safefree (PL_retstack);
536#endif 772#endif
537} 773}
538 774
539static void 775#define CORO_RSS \
540allocate_stack (Coro__State ctx, int alloc) 776 rss += sizeof (SYM (curstackinfo)); \
541{ 777 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
542 coro_stack *stack; 778 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
779 rss += SYM (tmps_max) * sizeof (SV *); \
780 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
781 rss += SYM (scopestack_max) * sizeof (I32); \
782 rss += SYM (savestack_max) * sizeof (ANY);
543 783
544 New (0, stack, 1, coro_stack); 784static size_t
785coro_rss (pTHX_ struct coro *coro)
786{
787 size_t rss = sizeof (*coro);
545 788
546 stack->refcnt = 1; 789 if (coro->mainstack)
547 stack->usecnt = 1;
548 stack->gencnt = ctx->gencnt = 0;
549
550 if (alloc)
551 { 790 {
552#if HAVE_MMAP 791 if (coro->flags & CF_RUNNING)
553 stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
554 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555 if (stack->sptr != (void *)-1)
556 { 792 {
557# if STACKGUARD 793 #define SYM(sym) PL_ ## sym
558 mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE); 794 CORO_RSS;
559# endif 795 #undef SYM
560 } 796 }
561 else 797 else
562#endif
563 { 798 {
564 stack->ssize = - (STACKSIZE * (long)sizeof (long)); 799 #define SYM(sym) coro->slot->sym
565 New (0, stack->sptr, STACKSIZE, long); 800 CORO_RSS;
801 #undef SYM
566 } 802 }
567 } 803 }
568 else
569 stack->sptr = 0;
570 804
571 ctx->stack = stack; 805 return rss;
572} 806}
573 807
808/** coroutine stack handling ************************************************/
809
810static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
811static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
812static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
813
814/* apparently < 5.8.8 */
815#ifndef MgPV_nolen_const
816#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
817 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
818 (const char*)(mg)->mg_ptr)
819#endif
820
821/*
822 * This overrides the default magic get method of %SIG elements.
823 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
824 * and instead of trying to save and restore the hash elements, we just provide
825 * readback here.
826 */
574static void 827static int
575deallocate_stack (Coro__State ctx) 828coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
576{ 829{
577 coro_stack *stack = ctx->stack; 830 const char *s = MgPV_nolen_const (mg);
578 831
579 ctx->stack = 0; 832 if (*s == '_')
580
581 if (stack)
582 { 833 {
583 if (!--stack->refcnt) 834 SV **svp = 0;
835
836 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
837 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
838
839 if (svp)
584 { 840 {
585#ifdef HAVE_MMAP 841 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
586 if (stack->ssize > 0 && stack->sptr) 842 return 0;
587 munmap (stack->sptr, stack->ssize);
588 else
589#endif
590 Safefree (stack->sptr);
591
592 Safefree (stack);
593 } 843 }
594 else if (ctx->gencnt == stack->gencnt) 844 }
595 --stack->usecnt; 845
846 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
847}
848
849static int
850coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
851{
852 const char *s = MgPV_nolen_const (mg);
853
854 if (*s == '_')
596 } 855 {
597} 856 SV **svp = 0;
598 857
858 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
859 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
860
861 if (svp)
862 {
863 SV *old = *svp;
864 *svp = 0;
865 SvREFCNT_dec (old);
866 return 0;
867 }
868 }
869
870 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
871}
872
599static void 873static int
600setup_coro (void *arg) 874coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
875{
876 const char *s = MgPV_nolen_const (mg);
877
878 if (*s == '_')
879 {
880 SV **svp = 0;
881
882 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
883 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
884
885 if (svp)
886 {
887 SV *old = *svp;
888 *svp = SvOK (sv) ? newSVsv (sv) : 0;
889 SvREFCNT_dec (old);
890 return 0;
891 }
892 }
893
894 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
895}
896
897static void
898prepare_nop (pTHX_ struct coro_transfer_args *ta)
899{
900 /* kind of mega-hacky, but works */
901 ta->next = ta->prev = (struct coro *)ta;
902}
903
904static int
905slf_check_nop (pTHX_ struct CoroSLF *frame)
906{
907 return 0;
908}
909
910static int
911slf_check_repeat (pTHX_ struct CoroSLF *frame)
912{
913 return 1;
914}
915
916static UNOP coro_setup_op;
917
918static void NOINLINE /* noinline to keep it out of the transfer fast path */
919coro_setup (pTHX_ struct coro *coro)
601{ 920{
602 /* 921 /*
603 * emulate part of the perl startup here. 922 * emulate part of the perl startup here.
604 */ 923 */
605 dTHX;
606 dSP;
607 Coro__State ctx = (Coro__State)arg;
608 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
609
610 coro_init_stacks (aTHX); 924 coro_init_stacks (aTHX);
611 /*PL_curcop = 0;*/ 925
612 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 926 PL_runops = RUNOPS_DEFAULT;
613 SvREFCNT_dec (GvAV (PL_defgv)); 927 PL_curcop = &PL_compiling;
928 PL_in_eval = EVAL_NULL;
929 PL_comppad = 0;
930 PL_comppad_name = 0;
931 PL_comppad_name_fill = 0;
932 PL_comppad_name_floor = 0;
933 PL_curpm = 0;
934 PL_curpad = 0;
935 PL_localizing = 0;
936 PL_dirty = 0;
937 PL_restartop = 0;
938#if PERL_VERSION_ATLEAST (5,10,0)
939 PL_parser = 0;
940#endif
941 PL_hints = 0;
942
943 /* recreate the die/warn hooks */
944 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
945 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
946
947 GvSV (PL_defgv) = newSV (0);
614 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 948 GvAV (PL_defgv) = coro->args; coro->args = 0;
949 GvSV (PL_errgv) = newSV (0);
950 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
951 GvHV (PL_hintgv) = 0;
952 PL_rs = newSVsv (GvSV (irsgv));
953 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
615 954
616 SPAGAIN; 955 {
956 dSP;
957 UNOP myop;
617 958
959 Zero (&myop, 1, UNOP);
960 myop.op_next = Nullop;
961 myop.op_type = OP_ENTERSUB;
962 myop.op_flags = OPf_WANT_VOID;
963
964 PUSHMARK (SP);
965 PUSHs ((SV *)coro->startcv);
966 PUTBACK;
967 PL_op = (OP *)&myop;
968 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
969 }
970
971 /* this newly created coroutine might be run on an existing cctx which most
972 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
973 */
974 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
975 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
976
977 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
978 coro_setup_op.op_next = PL_op;
979 coro_setup_op.op_type = OP_ENTERSUB;
980 coro_setup_op.op_ppaddr = pp_slf;
981 /* no flags etc. required, as an init function won't be called */
982
983 PL_op = (OP *)&coro_setup_op;
984
985 /* copy throw, in case it was set before coro_setup */
986 CORO_THROW = coro->except;
987}
988
989static void
990coro_unwind_stacks (pTHX)
991{
992 if (!IN_DESTRUCT)
993 {
994 /* restore all saved variables and stuff */
995 LEAVE_SCOPE (0);
996 assert (PL_tmps_floor == -1);
997
998 /* free all temporaries */
999 FREETMPS;
1000 assert (PL_tmps_ix == -1);
1001
1002 /* unwind all extra stacks */
1003 POPSTACK_TO (PL_mainstack);
1004
1005 /* unwind main stack */
1006 dounwind (-1);
1007 }
1008}
1009
1010static void
1011coro_destruct_perl (pTHX_ struct coro *coro)
1012{
1013 SV *svf [9];
1014
1015 {
1016 struct coro *current = SvSTATE_current;
1017
1018 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1019
1020 save_perl (aTHX_ current);
1021 load_perl (aTHX_ coro);
1022
1023 coro_unwind_stacks (aTHX);
1024 coro_destruct_stacks (aTHX);
1025
1026 // now save some sv's to be free'd later
1027 svf [0] = GvSV (PL_defgv);
1028 svf [1] = (SV *)GvAV (PL_defgv);
1029 svf [2] = GvSV (PL_errgv);
1030 svf [3] = (SV *)PL_defoutgv;
1031 svf [4] = PL_rs;
1032 svf [5] = GvSV (irsgv);
1033 svf [6] = (SV *)GvHV (PL_hintgv);
1034 svf [7] = PL_diehook;
1035 svf [8] = PL_warnhook;
1036 assert (9 == sizeof (svf) / sizeof (*svf));
1037
1038 load_perl (aTHX_ current);
1039 }
1040
1041 {
1042 int i;
1043
1044 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1045 SvREFCNT_dec (svf [i]);
1046
1047 SvREFCNT_dec (coro->saved_deffh);
1048 SvREFCNT_dec (coro->rouse_cb);
1049 SvREFCNT_dec (coro->invoke_cb);
1050 SvREFCNT_dec (coro->invoke_av);
1051 }
1052}
1053
1054INLINE void
1055free_coro_mortal (pTHX)
1056{
1057 if (expect_true (coro_mortal))
1058 {
1059 SvREFCNT_dec (coro_mortal);
1060 coro_mortal = 0;
1061 }
1062}
1063
1064static int
1065runops_trace (pTHX)
1066{
1067 COP *oldcop = 0;
1068 int oldcxix = -2;
1069
1070 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1071 {
1072 PERL_ASYNC_CHECK ();
1073
1074 if (cctx_current->flags & CC_TRACE_ALL)
1075 {
1076 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1077 {
1078 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1079 SV **bot, **top;
1080 AV *av = newAV (); /* return values */
1081 SV **cb;
1082 dSP;
1083
1084 GV *gv = CvGV (cx->blk_sub.cv);
1085 SV *fullname = sv_2mortal (newSV (0));
1086 if (isGV (gv))
1087 gv_efullname3 (fullname, gv, 0);
1088
1089 bot = PL_stack_base + cx->blk_oldsp + 1;
1090 top = cx->blk_gimme == G_ARRAY ? SP + 1
1091 : cx->blk_gimme == G_SCALAR ? bot + 1
1092 : bot;
1093
1094 av_extend (av, top - bot);
1095 while (bot < top)
1096 av_push (av, SvREFCNT_inc_NN (*bot++));
1097
1098 PL_runops = RUNOPS_DEFAULT;
1099 ENTER;
1100 SAVETMPS;
1101 EXTEND (SP, 3);
1102 PUSHMARK (SP);
1103 PUSHs (&PL_sv_no);
1104 PUSHs (fullname);
1105 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1106 PUTBACK;
1107 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1108 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1109 SPAGAIN;
1110 FREETMPS;
1111 LEAVE;
1112 PL_runops = runops_trace;
1113 }
1114
1115 if (oldcop != PL_curcop)
1116 {
1117 oldcop = PL_curcop;
1118
1119 if (PL_curcop != &PL_compiling)
1120 {
1121 SV **cb;
1122
1123 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1124 {
1125 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1126
1127 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1128 {
1129 dSP;
1130 GV *gv = CvGV (cx->blk_sub.cv);
1131 SV *fullname = sv_2mortal (newSV (0));
1132
1133 if (isGV (gv))
1134 gv_efullname3 (fullname, gv, 0);
1135
1136 PL_runops = RUNOPS_DEFAULT;
1137 ENTER;
1138 SAVETMPS;
1139 EXTEND (SP, 3);
1140 PUSHMARK (SP);
1141 PUSHs (&PL_sv_yes);
1142 PUSHs (fullname);
1143 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1144 PUTBACK;
1145 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1146 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1147 SPAGAIN;
1148 FREETMPS;
1149 LEAVE;
1150 PL_runops = runops_trace;
1151 }
1152
1153 oldcxix = cxstack_ix;
1154 }
1155
1156 if (cctx_current->flags & CC_TRACE_LINE)
1157 {
1158 dSP;
1159
1160 PL_runops = RUNOPS_DEFAULT;
1161 ENTER;
1162 SAVETMPS;
1163 EXTEND (SP, 3);
1164 PL_runops = RUNOPS_DEFAULT;
1165 PUSHMARK (SP);
1166 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1167 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1168 PUTBACK;
1169 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1170 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1171 SPAGAIN;
1172 FREETMPS;
1173 LEAVE;
1174 PL_runops = runops_trace;
1175 }
1176 }
1177 }
1178 }
1179 }
1180
1181 TAINT_NOT;
1182 return 0;
1183}
1184
1185static struct CoroSLF cctx_ssl_frame;
1186
1187static void
1188slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1189{
1190 ta->prev = 0;
1191}
1192
1193static int
1194slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1195{
1196 *frame = cctx_ssl_frame;
1197
1198 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1199}
1200
1201/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1202static void NOINLINE
1203cctx_prepare (pTHX)
1204{
1205 PL_top_env = &PL_start_env;
1206
1207 if (cctx_current->flags & CC_TRACE)
1208 PL_runops = runops_trace;
1209
1210 /* we already must be executing an SLF op, there is no other valid way
1211 * that can lead to creation of a new cctx */
1212 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1213 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1214
1215 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1216 cctx_ssl_frame = slf_frame;
1217
1218 slf_frame.prepare = slf_prepare_set_stacklevel;
1219 slf_frame.check = slf_check_set_stacklevel;
1220}
1221
1222/* the tail of transfer: execute stuff we can only do after a transfer */
1223INLINE void
1224transfer_tail (pTHX)
1225{
1226 free_coro_mortal (aTHX);
1227}
1228
1229/*
1230 * this is a _very_ stripped down perl interpreter ;)
1231 */
1232static void
1233cctx_run (void *arg)
1234{
1235#ifdef USE_ITHREADS
1236# if CORO_PTHREAD
1237 PERL_SET_CONTEXT (coro_thx);
1238# endif
1239#endif
1240 {
1241 dTHX;
1242
1243 /* normally we would need to skip the entersub here */
1244 /* not doing so will re-execute it, which is exactly what we want */
1245 /* PL_nop = PL_nop->op_next */
1246
1247 /* inject a fake subroutine call to cctx_init */
1248 cctx_prepare (aTHX);
1249
1250 /* cctx_run is the alternative tail of transfer() */
1251 transfer_tail (aTHX);
1252
1253 /* somebody or something will hit me for both perl_run and PL_restartop */
1254 PL_restartop = PL_op;
1255 perl_run (PL_curinterp);
1256 /*
1257 * Unfortunately, there is no way to get at the return values of the
1258 * coro body here, as perl_run destroys these
1259 */
1260
1261 /*
1262 * If perl-run returns we assume exit() was being called or the coro
1263 * fell off the end, which seems to be the only valid (non-bug)
1264 * reason for perl_run to return. We try to exit by jumping to the
1265 * bootstrap-time "top" top_env, as we cannot restore the "main"
1266 * coroutine as Coro has no such concept.
1267 * This actually isn't valid with the pthread backend, but OSes requiring
1268 * that backend are too broken to do it in a standards-compliant way.
1269 */
1270 PL_top_env = main_top_env;
1271 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1272 }
1273}
1274
1275static coro_cctx *
1276cctx_new ()
1277{
1278 coro_cctx *cctx;
1279
1280 ++cctx_count;
1281 New (0, cctx, 1, coro_cctx);
1282
1283 cctx->gen = cctx_gen;
1284 cctx->flags = 0;
1285 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1286
1287 return cctx;
1288}
1289
1290/* create a new cctx only suitable as source */
1291static coro_cctx *
1292cctx_new_empty ()
1293{
1294 coro_cctx *cctx = cctx_new ();
1295
1296 cctx->sptr = 0;
1297 coro_create (&cctx->cctx, 0, 0, 0, 0);
1298
1299 return cctx;
1300}
1301
1302/* create a new cctx suitable as destination/running a perl interpreter */
1303static coro_cctx *
1304cctx_new_run ()
1305{
1306 coro_cctx *cctx = cctx_new ();
1307 void *stack_start;
1308 size_t stack_size;
1309
1310#if HAVE_MMAP
1311 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1312 /* mmap supposedly does allocate-on-write for us */
1313 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1314
1315 if (cctx->sptr != (void *)-1)
1316 {
1317 #if CORO_STACKGUARD
1318 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1319 #endif
1320 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1321 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1322 cctx->flags |= CC_MAPPED;
1323 }
1324 else
1325#endif
1326 {
1327 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1328 New (0, cctx->sptr, cctx_stacksize, long);
1329
1330 if (!cctx->sptr)
1331 {
1332 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1333 _exit (EXIT_FAILURE);
1334 }
1335
1336 stack_start = cctx->sptr;
1337 stack_size = cctx->ssize;
1338 }
1339
1340 #if CORO_USE_VALGRIND
1341 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1342 #endif
1343
1344 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1345
1346 return cctx;
1347}
1348
1349static void
1350cctx_destroy (coro_cctx *cctx)
1351{
1352 if (!cctx)
1353 return;
1354
1355 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1356
1357 --cctx_count;
1358 coro_destroy (&cctx->cctx);
1359
1360 /* coro_transfer creates new, empty cctx's */
618 if (ctx->stack) 1361 if (cctx->sptr)
1362 {
1363 #if CORO_USE_VALGRIND
1364 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1365 #endif
1366
1367#if HAVE_MMAP
1368 if (cctx->flags & CC_MAPPED)
1369 munmap (cctx->sptr, cctx->ssize);
1370 else
1371#endif
1372 Safefree (cctx->sptr);
619 { 1373 }
620 ctx->cursp = 0;
621 1374
1375 Safefree (cctx);
1376}
1377
1378/* wether this cctx should be destructed */
1379#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1380
1381static coro_cctx *
1382cctx_get (pTHX)
1383{
1384 while (expect_true (cctx_first))
1385 {
1386 coro_cctx *cctx = cctx_first;
1387 cctx_first = cctx->next;
1388 --cctx_idle;
1389
1390 if (expect_true (!CCTX_EXPIRED (cctx)))
1391 return cctx;
1392
1393 cctx_destroy (cctx);
1394 }
1395
1396 return cctx_new_run ();
1397}
1398
1399static void
1400cctx_put (coro_cctx *cctx)
1401{
1402 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1403
1404 /* free another cctx if overlimit */
1405 if (expect_false (cctx_idle >= cctx_max_idle))
1406 {
1407 coro_cctx *first = cctx_first;
1408 cctx_first = first->next;
1409 --cctx_idle;
1410
1411 cctx_destroy (first);
1412 }
1413
1414 ++cctx_idle;
1415 cctx->next = cctx_first;
1416 cctx_first = cctx;
1417}
1418
1419/** coroutine switching *****************************************************/
1420
1421static void
1422transfer_check (pTHX_ struct coro *prev, struct coro *next)
1423{
1424 /* TODO: throwing up here is considered harmful */
1425
1426 if (expect_true (prev != next))
1427 {
1428 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1429 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1430
1431 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1432 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1433
1434#if !PERL_VERSION_ATLEAST (5,10,0)
1435 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1436 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1437#endif
1438 }
1439}
1440
1441/* always use the TRANSFER macro */
1442static void NOINLINE /* noinline so we have a fixed stackframe */
1443transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1444{
1445 dSTACKLEVEL;
1446
1447 /* sometimes transfer is only called to set idle_sp */
1448 if (expect_false (!prev))
1449 {
1450 cctx_current->idle_sp = STACKLEVEL;
1451 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1452 }
1453 else if (expect_true (prev != next))
1454 {
1455 coro_cctx *cctx_prev;
1456
1457 if (expect_false (prev->flags & CF_NEW))
1458 {
1459 /* create a new empty/source context */
1460 prev->flags &= ~CF_NEW;
1461 prev->flags |= CF_RUNNING;
1462 }
1463
1464 prev->flags &= ~CF_RUNNING;
1465 next->flags |= CF_RUNNING;
1466
1467 /* first get rid of the old state */
1468 save_perl (aTHX_ prev);
1469
1470 if (expect_false (next->flags & CF_NEW))
1471 {
1472 /* need to start coroutine */
1473 next->flags &= ~CF_NEW;
1474 /* setup coroutine call */
1475 coro_setup (aTHX_ next);
1476 }
1477 else
1478 load_perl (aTHX_ next);
1479
1480 /* possibly untie and reuse the cctx */
1481 if (expect_true (
1482 cctx_current->idle_sp == STACKLEVEL
1483 && !(cctx_current->flags & CC_TRACE)
1484 && !force_cctx
1485 ))
1486 {
1487 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1488 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1489
1490 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1491 /* without this the next cctx_get might destroy the running cctx while still in use */
1492 if (expect_false (CCTX_EXPIRED (cctx_current)))
1493 if (expect_true (!next->cctx))
1494 next->cctx = cctx_get (aTHX);
1495
1496 cctx_put (cctx_current);
1497 }
1498 else
1499 prev->cctx = cctx_current;
1500
1501 ++next->usecount;
1502
1503 cctx_prev = cctx_current;
1504 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1505
1506 next->cctx = 0;
1507
1508 if (expect_false (cctx_prev != cctx_current))
1509 {
1510 cctx_prev->top_env = PL_top_env;
1511 PL_top_env = cctx_current->top_env;
1512 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1513 }
1514
1515 transfer_tail (aTHX);
1516 }
1517}
1518
1519#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1520#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1521
1522/** high level stuff ********************************************************/
1523
1524static int
1525coro_state_destroy (pTHX_ struct coro *coro)
1526{
1527 if (coro->flags & CF_DESTROYED)
1528 return 0;
1529
1530 if (coro->on_destroy && !PL_dirty)
1531 coro->on_destroy (aTHX_ coro);
1532
1533 coro->flags |= CF_DESTROYED;
1534
1535 if (coro->flags & CF_READY)
1536 {
1537 /* reduce nready, as destroying a ready coro effectively unreadies it */
1538 /* alternative: look through all ready queues and remove the coro */
1539 --coro_nready;
1540 }
1541 else
1542 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1543
1544 if (coro->mainstack
1545 && coro->mainstack != main_mainstack
1546 && coro->slot
1547 && !PL_dirty)
1548 coro_destruct_perl (aTHX_ coro);
1549
1550 cctx_destroy (coro->cctx);
1551 SvREFCNT_dec (coro->startcv);
1552 SvREFCNT_dec (coro->args);
1553 SvREFCNT_dec (CORO_THROW);
1554
1555 if (coro->next) coro->next->prev = coro->prev;
1556 if (coro->prev) coro->prev->next = coro->next;
1557 if (coro == coro_first) coro_first = coro->next;
1558
1559 return 1;
1560}
1561
1562static int
1563coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1564{
1565 struct coro *coro = (struct coro *)mg->mg_ptr;
1566 mg->mg_ptr = 0;
1567
1568 coro->hv = 0;
1569
1570 if (--coro->refcnt < 0)
1571 {
1572 coro_state_destroy (aTHX_ coro);
1573 Safefree (coro);
1574 }
1575
1576 return 0;
1577}
1578
1579static int
1580coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1581{
1582 struct coro *coro = (struct coro *)mg->mg_ptr;
1583
1584 ++coro->refcnt;
1585
1586 return 0;
1587}
1588
1589static MGVTBL coro_state_vtbl = {
1590 0, 0, 0, 0,
1591 coro_state_free,
1592 0,
1593#ifdef MGf_DUP
1594 coro_state_dup,
1595#else
1596# define MGf_DUP 0
1597#endif
1598};
1599
1600static void
1601prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1602{
1603 ta->prev = SvSTATE (prev_sv);
1604 ta->next = SvSTATE (next_sv);
1605 TRANSFER_CHECK (*ta);
1606}
1607
1608static void
1609api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1610{
1611 struct coro_transfer_args ta;
1612
1613 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1614 TRANSFER (ta, 1);
1615}
1616
1617/*****************************************************************************/
1618/* gensub: simple closure generation utility */
1619
1620#define GENSUB_ARG CvXSUBANY (cv).any_ptr
1621
1622/* create a closure from XS, returns a code reference */
1623/* the arg can be accessed via GENSUB_ARG from the callback */
1624/* the callback must use dXSARGS/XSRETURN */
1625static SV *
1626gensub (pTHX_ void (*xsub)(pTHX_ CV *), void *arg)
1627{
1628 CV *cv = (CV *)newSV (0);
1629
1630 sv_upgrade ((SV *)cv, SVt_PVCV);
1631
1632 CvANON_on (cv);
1633 CvISXSUB_on (cv);
1634 CvXSUB (cv) = xsub;
1635 GENSUB_ARG = arg;
1636
1637 return newRV_noinc ((SV *)cv);
1638}
1639
1640/** Coro ********************************************************************/
1641
1642INLINE void
1643coro_enq (pTHX_ struct coro *coro)
1644{
1645 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1646
1647 SvREFCNT_inc_NN (coro->hv);
1648
1649 coro->next_ready = 0;
1650 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1651 ready [1] = coro;
1652}
1653
1654INLINE struct coro *
1655coro_deq (pTHX)
1656{
1657 int prio;
1658
1659 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1660 {
1661 struct coro **ready = coro_ready [prio];
1662
1663 if (ready [0])
1664 {
1665 struct coro *coro = ready [0];
1666 ready [0] = coro->next_ready;
1667 return coro;
1668 }
1669 }
1670
1671 return 0;
1672}
1673
1674static int
1675api_ready (pTHX_ SV *coro_sv)
1676{
1677 struct coro *coro;
1678 SV *sv_hook;
1679 void (*xs_hook)(void);
1680
1681 coro = SvSTATE (coro_sv);
1682
1683 if (coro->flags & CF_READY)
1684 return 0;
1685
1686 coro->flags |= CF_READY;
1687
1688 sv_hook = coro_nready ? 0 : coro_readyhook;
1689 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1690
1691 coro_enq (aTHX_ coro);
1692 ++coro_nready;
1693
1694 if (sv_hook)
1695 {
1696 dSP;
1697
1698 ENTER;
1699 SAVETMPS;
1700
622 PUSHMARK(SP); 1701 PUSHMARK (SP);
623 PUTBACK; 1702 PUTBACK;
624 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1703 call_sv (sv_hook, G_VOID | G_DISCARD);
625 1704
626 if (SvTRUE (ERRSV)) 1705 FREETMPS;
627 croak (NULL); 1706 LEAVE;
628 else
629 croak ("FATAL: CCTXT coroutine returned!");
630 }
631 else
632 { 1707 }
633 UNOP myop;
634 1708
635 Zero(&myop, 1, UNOP); 1709 if (xs_hook)
636 myop.op_next = Nullop; 1710 xs_hook ();
637 myop.op_flags = OPf_WANT_VOID;
638 1711
639 PL_op = (OP *)&myop; 1712 return 1;
1713}
640 1714
641 PUSHMARK(SP); 1715static int
642 XPUSHs (sub_init); 1716api_is_ready (pTHX_ SV *coro_sv)
643 /* 1717{
644 * the next line is slightly wrong, as PL_op->op_next 1718 return !!(SvSTATE (coro_sv)->flags & CF_READY);
645 * is actually being executed so we skip the first op. 1719}
646 * that doesn't matter, though, since it is only
647 * pp_nextstate and we never return...
648 * ah yes, and I don't care anyways ;)
649 */
650 PUTBACK;
651 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652 SPAGAIN;
653 1720
654 ENTER; /* necessary e.g. for dounwind */ 1721/* expects to own a reference to next->hv */
1722INLINE void
1723prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1724{
1725 SV *prev_sv = SvRV (coro_current);
1726
1727 ta->prev = SvSTATE_hv (prev_sv);
1728 ta->next = next;
1729
1730 TRANSFER_CHECK (*ta);
1731
1732 SvRV_set (coro_current, (SV *)next->hv);
1733
1734 free_coro_mortal (aTHX);
1735 coro_mortal = prev_sv;
1736}
1737
1738static void
1739prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1740{
1741 for (;;)
655 } 1742 {
656} 1743 struct coro *next = coro_deq (aTHX);
657 1744
658static void 1745 if (expect_true (next))
659continue_coro (void *arg)
660{
661 /*
662 * this is a _very_ stripped down perl interpreter ;)
663 */
664 dTHX;
665 Coro__State ctx = (Coro__State)arg;
666
667 PL_top_env = &PL_start_env;
668
669 ctx->cursp = 0;
670 PL_op = PL_op->op_next;
671 CALLRUNOPS(aTHX);
672
673 abort ();
674}
675
676/* never call directly, always through the coro_state_transfer global variable */
677static void
678transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
679{
680 dSTACKLEVEL;
681
682 if (prev != next)
683 {
684 /* has this coro been created yet? */
685 if (next->mainstack)
686 { 1746 {
687 LOCK; 1747 /* cannot transfer to destroyed coros, skip and look for next */
688 SAVE (prev, flags); 1748 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
689 LOAD (next); 1749 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
690 UNLOCK; 1750 else
691
692 /* mark this state as in-use */
693 next->mainstack = 0;
694 next->tmps_ix = -2;
695
696 /* stacklevel changed? if yes, grab the stack for us! */
697 if (flags & TRANSFER_SAVE_CCTXT)
698 { 1751 {
699 if (!prev->stack) 1752 next->flags &= ~CF_READY;
700 allocate_stack (prev, 0); 1753 --coro_nready;
701 else if (prev->cursp != stacklevel 1754
702 && prev->stack->usecnt > 1) 1755 prepare_schedule_to (aTHX_ ta, next);
703 { 1756 break;
704 prev->gencnt = ++prev->stack->gencnt;
705 prev->stack->usecnt = 1;
706 }
707
708 /* has our stack been invalidated? */
709 if (next->stack && next->stack->gencnt != next->gencnt)
710 {
711 deallocate_stack (next);
712 allocate_stack (next, 1);
713 coro_create (&(next->stack->cctx),
714 continue_coro, (void *)next,
715 next->stack->sptr, labs (next->stack->ssize));
716 }
717
718 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
719 prev->cursp = stacklevel;
720 /* don't add any code here */
721 } 1757 }
722 else
723 next->cursp = stacklevel;
724 } 1758 }
725 else if (next->tmps_ix == -2)
726 croak ("tried to transfer to running coroutine");
727 else 1759 else
728 { 1760 {
729 LOCK; 1761 /* nothing to schedule: call the idle handler */
730 SAVE (prev, -1); /* first get rid of the old state */ 1762 if (SvROK (sv_idle)
731 UNLOCK; 1763 && SvOBJECT (SvRV (sv_idle)))
732
733 /* create the coroutine for the first time */
734 if (flags & TRANSFER_SAVE_CCTXT)
735 { 1764 {
736 if (!prev->stack) 1765 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
737 allocate_stack (prev, 0); 1766 api_ready (aTHX_ SvRV (sv_idle));
738 1767 --coro_nready;
739 /* the new coroutine starts with start_env again */
740 PL_top_env = &PL_start_env;
741
742 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
743 {
744 setup_coro (next);
745 next->cursp = stacklevel;
746
747 prev->stack->refcnt++;
748 prev->stack->usecnt++;
749 next->stack = prev->stack;
750 next->gencnt = prev->gencnt;
751 }
752 else
753 {
754 assert (!next->stack);
755 allocate_stack (next, 1);
756 coro_create (&(next->stack->cctx),
757 setup_coro, (void *)next,
758 next->stack->sptr, labs (next->stack->ssize));
759 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
760 prev->cursp = stacklevel;
761 /* don't add any code here */
762 }
763 } 1768 }
764 else 1769 else
765 { 1770 {
766 setup_coro (next); 1771 dSP;
767 next->cursp = stacklevel; 1772
1773 ENTER;
1774 SAVETMPS;
1775
1776 PUSHMARK (SP);
1777 PUTBACK;
1778 call_sv (sv_idle, G_VOID | G_DISCARD);
1779
1780 FREETMPS;
1781 LEAVE;
768 } 1782 }
769 } 1783 }
770 } 1784 }
1785}
771 1786
772 LOCK; 1787INLINE void
1788prepare_cede (pTHX_ struct coro_transfer_args *ta)
1789{
1790 api_ready (aTHX_ coro_current);
1791 prepare_schedule (aTHX_ ta);
1792}
1793
1794INLINE void
1795prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1796{
1797 SV *prev = SvRV (coro_current);
1798
773 if (coro_mortal) 1799 if (coro_nready)
774 {
775 SvREFCNT_dec (coro_mortal);
776 coro_mortal = 0;
777 } 1800 {
778 UNLOCK; 1801 prepare_schedule (aTHX_ ta);
779} 1802 api_ready (aTHX_ prev);
780
781/* use this function pointer to call the above function */
782/* this is done to increase chances of the compiler not inlining the call */
783void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
784
785#define SV_CORO(sv,func) \
786 do { \
787 if (SvROK (sv)) \
788 sv = SvRV (sv); \
789 \
790 if (SvTYPE (sv) == SVt_PVHV && SvSTASH (sv) != coro_state_stash) \
791 { \
792 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
793 \
794 if (!he) \
795 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
796 \
797 (sv) = SvRV (HeVAL(he)); \
798 } \
799 \
800 /* must also be changed inside Coro::Cont::yield */ \
801 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
802 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
803 \
804 } while(0)
805
806static void
807coro_state_destroy (struct coro *coro)
808{
809 if (coro->refcnt--)
810 return;
811
812 if (coro->mainstack && coro->mainstack != main_mainstack)
813 { 1803 }
814 struct coro temp; 1804 else
1805 prepare_nop (aTHX_ ta);
1806}
815 1807
816 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1808static void
817 LOAD (aTHX_ coro); 1809api_schedule (pTHX)
1810{
1811 struct coro_transfer_args ta;
818 1812
819 destroy_stacks (aTHX); 1813 prepare_schedule (aTHX_ &ta);
1814 TRANSFER (ta, 1);
1815}
820 1816
821 LOAD ((&temp)); /* this will get rid of defsv etc.. */ 1817static void
1818api_schedule_to (pTHX_ SV *coro_sv)
1819{
1820 struct coro_transfer_args ta;
1821 struct coro *next = SvSTATE (coro_sv);
822 1822
823 coro->mainstack = 0;
824 }
825
826 deallocate_stack (coro);
827 SvREFCNT_dec (coro->args); 1823 SvREFCNT_inc_NN (coro_sv);
828 Safefree (coro); 1824 prepare_schedule_to (aTHX_ &ta, next);
829} 1825}
830 1826
831static int 1827static int
832coro_state_clear (SV *sv, MAGIC *mg) 1828api_cede (pTHX)
833{ 1829{
1830 struct coro_transfer_args ta;
1831
1832 prepare_cede (aTHX_ &ta);
1833
1834 if (expect_true (ta.prev != ta.next))
1835 {
1836 TRANSFER (ta, 1);
1837 return 1;
1838 }
1839 else
1840 return 0;
1841}
1842
1843static int
1844api_cede_notself (pTHX)
1845{
1846 if (coro_nready)
1847 {
1848 struct coro_transfer_args ta;
1849
1850 prepare_cede_notself (aTHX_ &ta);
1851 TRANSFER (ta, 1);
1852 return 1;
1853 }
1854 else
1855 return 0;
1856}
1857
1858static void
1859api_trace (pTHX_ SV *coro_sv, int flags)
1860{
1861 struct coro *coro = SvSTATE (coro_sv);
1862
1863 if (coro->flags & CF_RUNNING)
1864 croak ("cannot enable tracing on a running coroutine, caught");
1865
1866 if (flags & CC_TRACE)
1867 {
1868 if (!coro->cctx)
1869 coro->cctx = cctx_new_run ();
1870 else if (!(coro->cctx->flags & CC_TRACE))
1871 croak ("cannot enable tracing on coroutine with custom stack, caught");
1872
1873 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1874 }
1875 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1876 {
1877 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1878
1879 if (coro->flags & CF_RUNNING)
1880 PL_runops = RUNOPS_DEFAULT;
1881 else
1882 coro->slot->runops = RUNOPS_DEFAULT;
1883 }
1884}
1885
1886static void
1887coro_call_on_destroy (pTHX_ struct coro *coro)
1888{
1889 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1890 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1891
1892 if (on_destroyp)
1893 {
1894 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1895
1896 while (AvFILLp (on_destroy) >= 0)
1897 {
1898 dSP; /* don't disturb outer sp */
1899 SV *cb = av_pop (on_destroy);
1900
1901 PUSHMARK (SP);
1902
1903 if (statusp)
1904 {
1905 int i;
1906 AV *status = (AV *)SvRV (*statusp);
1907 EXTEND (SP, AvFILLp (status) + 1);
1908
1909 for (i = 0; i <= AvFILLp (status); ++i)
1910 PUSHs (AvARRAY (status)[i]);
1911 }
1912
1913 PUTBACK;
1914 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1915 }
1916 }
1917}
1918
1919static void
1920slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1921{
1922 int i;
1923 HV *hv = (HV *)SvRV (coro_current);
1924 AV *av = newAV ();
1925
1926 av_extend (av, items - 1);
1927 for (i = 0; i < items; ++i)
1928 av_push (av, SvREFCNT_inc_NN (arg [i]));
1929
1930 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1931
1932 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1933 api_ready (aTHX_ sv_manager);
1934
1935 frame->prepare = prepare_schedule;
1936 frame->check = slf_check_repeat;
1937
1938 /* as a minor optimisation, we could unwind all stacks here */
1939 /* but that puts extra pressure on pp_slf, and is not worth much */
1940 /*coro_unwind_stacks (aTHX);*/
1941}
1942
1943/*****************************************************************************/
1944/* async pool handler */
1945
1946static int
1947slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1948{
1949 HV *hv = (HV *)SvRV (coro_current);
834 struct coro *coro = (struct coro *)mg->mg_ptr; 1950 struct coro *coro = (struct coro *)frame->data;
835 mg->mg_ptr = 0;
836 1951
837 coro_state_destroy (coro); 1952 if (!coro->invoke_cb)
1953 return 1; /* loop till we have invoke */
1954 else
1955 {
1956 hv_store (hv, "desc", sizeof ("desc") - 1,
1957 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1958
1959 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1960
1961 {
1962 dSP;
1963 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1964 PUTBACK;
1965 }
1966
1967 SvREFCNT_dec (GvAV (PL_defgv));
1968 GvAV (PL_defgv) = coro->invoke_av;
1969 coro->invoke_av = 0;
1970
1971 return 0;
1972 }
1973}
1974
1975static void
1976slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1977{
1978 HV *hv = (HV *)SvRV (coro_current);
1979 struct coro *coro = SvSTATE_hv ((SV *)hv);
1980
1981 if (expect_true (coro->saved_deffh))
1982 {
1983 /* subsequent iteration */
1984 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1985 coro->saved_deffh = 0;
1986
1987 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1988 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1989 {
1990 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1991 coro->invoke_av = newAV ();
1992
1993 frame->prepare = prepare_nop;
1994 }
1995 else
1996 {
1997 av_clear (GvAV (PL_defgv));
1998 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1999
2000 coro->prio = 0;
2001
2002 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2003 api_trace (aTHX_ coro_current, 0);
2004
2005 frame->prepare = prepare_schedule;
2006 av_push (av_async_pool, SvREFCNT_inc (hv));
2007 }
2008 }
2009 else
2010 {
2011 /* first iteration, simply fall through */
2012 frame->prepare = prepare_nop;
2013 }
2014
2015 frame->check = slf_check_pool_handler;
2016 frame->data = (void *)coro;
2017}
2018
2019/*****************************************************************************/
2020/* rouse callback */
2021
2022#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2023
2024static void
2025coro_rouse_callback (pTHX_ CV *cv)
2026{
2027 dXSARGS;
2028 SV *data = (SV *)GENSUB_ARG;
2029
2030 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2031 {
2032 /* first call, set args */
2033 SV *coro = SvRV (data);
2034 AV *av = newAV ();
2035
2036 SvRV_set (data, (SV *)av);
2037
2038 /* better take a full copy of the arguments */
2039 while (items--)
2040 av_store (av, items, newSVsv (ST (items)));
2041
2042 api_ready (aTHX_ coro);
2043 SvREFCNT_dec (coro);
2044 }
2045
2046 XSRETURN_EMPTY;
2047}
2048
2049static int
2050slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2051{
2052 SV *data = (SV *)frame->data;
2053
2054 if (CORO_THROW)
2055 return 0;
2056
2057 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2058 return 1;
2059
2060 /* now push all results on the stack */
2061 {
2062 dSP;
2063 AV *av = (AV *)SvRV (data);
2064 int i;
2065
2066 EXTEND (SP, AvFILLp (av) + 1);
2067 for (i = 0; i <= AvFILLp (av); ++i)
2068 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2069
2070 /* we have stolen the elements, so set length to zero and free */
2071 AvFILLp (av) = -1;
2072 av_undef (av);
2073
2074 PUTBACK;
2075 }
838 2076
839 return 0; 2077 return 0;
840} 2078}
841 2079
2080static void
2081slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2082{
2083 SV *cb;
2084
2085 if (items)
2086 cb = arg [0];
2087 else
2088 {
2089 struct coro *coro = SvSTATE_current;
2090
2091 if (!coro->rouse_cb)
2092 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2093
2094 cb = sv_2mortal (coro->rouse_cb);
2095 coro->rouse_cb = 0;
2096 }
2097
2098 if (!SvROK (cb)
2099 || SvTYPE (SvRV (cb)) != SVt_PVCV
2100 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2101 croak ("Coro::rouse_wait called with illegal callback argument,");
2102
2103 {
2104 CV *cv = (CV *)SvRV (cb); /* for GENSUB_ARG */
2105 SV *data = (SV *)GENSUB_ARG;
2106
2107 frame->data = (void *)data;
2108 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2109 frame->check = slf_check_rouse_wait;
2110 }
2111}
2112
2113static SV *
2114coro_new_rouse_cb (pTHX)
2115{
2116 HV *hv = (HV *)SvRV (coro_current);
2117 struct coro *coro = SvSTATE_hv (hv);
2118 SV *data = newRV_inc ((SV *)hv);
2119 SV *cb = gensub (aTHX_ coro_rouse_callback, (void *)data);
2120
2121 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
2122 SvREFCNT_dec (data); /* magicext increases the refcount */
2123
2124 SvREFCNT_dec (coro->rouse_cb);
2125 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2126
2127 return cb;
2128}
2129
2130/*****************************************************************************/
2131/* schedule-like-function opcode (SLF) */
2132
2133static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2134static const CV *slf_cv;
2135static SV **slf_argv;
2136static int slf_argc, slf_arga; /* count, allocated */
2137static I32 slf_ax; /* top of stack, for restore */
2138
2139/* this restores the stack in the case we patched the entersub, to */
2140/* recreate the stack frame as perl will on following calls */
2141/* since entersub cleared the stack */
2142static OP *
2143pp_restore (pTHX)
2144{
2145 int i;
2146 SV **SP = PL_stack_base + slf_ax;
2147
2148 PUSHMARK (SP);
2149
2150 EXTEND (SP, slf_argc + 1);
2151
2152 for (i = 0; i < slf_argc; ++i)
2153 PUSHs (sv_2mortal (slf_argv [i]));
2154
2155 PUSHs ((SV *)CvGV (slf_cv));
2156
2157 RETURNOP (slf_restore.op_first);
2158}
2159
2160static void
2161slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2162{
2163 SV **arg = (SV **)slf_frame.data;
2164
2165 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2166}
2167
2168static void
2169slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2170{
2171 if (items != 2)
2172 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2173
2174 frame->prepare = slf_prepare_transfer;
2175 frame->check = slf_check_nop;
2176 frame->data = (void *)arg; /* let's hope it will stay valid */
2177}
2178
2179static void
2180slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2181{
2182 frame->prepare = prepare_schedule;
2183 frame->check = slf_check_nop;
2184}
2185
2186static void
2187slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2188{
2189 struct coro *next = (struct coro *)slf_frame.data;
2190
2191 SvREFCNT_inc_NN (next->hv);
2192 prepare_schedule_to (aTHX_ ta, next);
2193}
2194
2195static void
2196slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2197{
2198 if (!items)
2199 croak ("Coro::schedule_to expects a coroutine argument, caught");
2200
2201 frame->data = (void *)SvSTATE (arg [0]);
2202 frame->prepare = slf_prepare_schedule_to;
2203 frame->check = slf_check_nop;
2204}
2205
2206static void
2207slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2208{
2209 api_ready (aTHX_ SvRV (coro_current));
2210
2211 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2212}
2213
2214static void
2215slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 frame->prepare = prepare_cede;
2218 frame->check = slf_check_nop;
2219}
2220
2221static void
2222slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2223{
2224 frame->prepare = prepare_cede_notself;
2225 frame->check = slf_check_nop;
2226}
2227
2228/*
2229 * these not obviously related functions are all rolled into one
2230 * function to increase chances that they all will call transfer with the same
2231 * stack offset
2232 * SLF stands for "schedule-like-function".
2233 */
2234static OP *
2235pp_slf (pTHX)
2236{
2237 I32 checkmark; /* mark SP to see how many elements check has pushed */
2238
2239 /* set up the slf frame, unless it has already been set-up */
2240 /* the latter happens when a new coro has been started */
2241 /* or when a new cctx was attached to an existing coroutine */
2242 if (expect_true (!slf_frame.prepare))
2243 {
2244 /* first iteration */
2245 dSP;
2246 SV **arg = PL_stack_base + TOPMARK + 1;
2247 int items = SP - arg; /* args without function object */
2248 SV *gv = *sp;
2249
2250 /* do a quick consistency check on the "function" object, and if it isn't */
2251 /* for us, divert to the real entersub */
2252 if (SvTYPE (gv) != SVt_PVGV
2253 || !GvCV (gv)
2254 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2255 return PL_ppaddr[OP_ENTERSUB](aTHX);
2256
2257 if (!(PL_op->op_flags & OPf_STACKED))
2258 {
2259 /* ampersand-form of call, use @_ instead of stack */
2260 AV *av = GvAV (PL_defgv);
2261 arg = AvARRAY (av);
2262 items = AvFILLp (av) + 1;
2263 }
2264
2265 /* now call the init function, which needs to set up slf_frame */
2266 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2267 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2268
2269 /* pop args */
2270 SP = PL_stack_base + POPMARK;
2271
2272 PUTBACK;
2273 }
2274
2275 /* now that we have a slf_frame, interpret it! */
2276 /* we use a callback system not to make the code needlessly */
2277 /* complicated, but so we can run multiple perl coros from one cctx */
2278
2279 do
2280 {
2281 struct coro_transfer_args ta;
2282
2283 slf_frame.prepare (aTHX_ &ta);
2284 TRANSFER (ta, 0);
2285
2286 checkmark = PL_stack_sp - PL_stack_base;
2287 }
2288 while (slf_frame.check (aTHX_ &slf_frame));
2289
2290 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2291
2292 /* exception handling */
2293 if (expect_false (CORO_THROW))
2294 {
2295 SV *exception = sv_2mortal (CORO_THROW);
2296
2297 CORO_THROW = 0;
2298 sv_setsv (ERRSV, exception);
2299 croak (0);
2300 }
2301
2302 /* return value handling - mostly like entersub */
2303 /* make sure we put something on the stack in scalar context */
2304 if (GIMME_V == G_SCALAR)
2305 {
2306 dSP;
2307 SV **bot = PL_stack_base + checkmark;
2308
2309 if (sp == bot) /* too few, push undef */
2310 bot [1] = &PL_sv_undef;
2311 else if (sp != bot + 1) /* too many, take last one */
2312 bot [1] = *sp;
2313
2314 SP = bot + 1;
2315
2316 PUTBACK;
2317 }
2318
2319 return NORMAL;
2320}
2321
2322static void
2323api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2324{
2325 int i;
2326 SV **arg = PL_stack_base + ax;
2327 int items = PL_stack_sp - arg + 1;
2328
2329 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2330
2331 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2332 && PL_op->op_ppaddr != pp_slf)
2333 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2334
2335 CvFLAGS (cv) |= CVf_SLF;
2336 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2337 slf_cv = cv;
2338
2339 /* we patch the op, and then re-run the whole call */
2340 /* we have to put the same argument on the stack for this to work */
2341 /* and this will be done by pp_restore */
2342 slf_restore.op_next = (OP *)&slf_restore;
2343 slf_restore.op_type = OP_CUSTOM;
2344 slf_restore.op_ppaddr = pp_restore;
2345 slf_restore.op_first = PL_op;
2346
2347 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2348
2349 if (PL_op->op_flags & OPf_STACKED)
2350 {
2351 if (items > slf_arga)
2352 {
2353 slf_arga = items;
2354 free (slf_argv);
2355 slf_argv = malloc (slf_arga * sizeof (SV *));
2356 }
2357
2358 slf_argc = items;
2359
2360 for (i = 0; i < items; ++i)
2361 slf_argv [i] = SvREFCNT_inc (arg [i]);
2362 }
2363 else
2364 slf_argc = 0;
2365
2366 PL_op->op_ppaddr = pp_slf;
2367 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2368
2369 PL_op = (OP *)&slf_restore;
2370}
2371
2372/*****************************************************************************/
2373/* dynamic wind */
2374
2375static void
2376on_enterleave_call (pTHX_ SV *cb)
2377{
2378 dSP;
2379
2380 PUSHSTACK;
2381
2382 PUSHMARK (SP);
2383 PUTBACK;
2384 call_sv (cb, G_VOID | G_DISCARD);
2385 SPAGAIN;
2386
2387 POPSTACK;
2388}
2389
2390static SV *
2391coro_avp_pop_and_free (pTHX_ AV **avp)
2392{
2393 AV *av = *avp;
2394 SV *res = av_pop (av);
2395
2396 if (AvFILLp (av) < 0)
2397 {
2398 *avp = 0;
2399 SvREFCNT_dec (av);
2400 }
2401
2402 return res;
2403}
2404
2405static void
2406coro_pop_on_enter (pTHX_ void *coro)
2407{
2408 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2409 SvREFCNT_dec (cb);
2410}
2411
2412static void
2413coro_pop_on_leave (pTHX_ void *coro)
2414{
2415 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2416 on_enterleave_call (aTHX_ sv_2mortal (cb));
2417}
2418
2419/*****************************************************************************/
2420/* PerlIO::cede */
2421
2422typedef struct
2423{
2424 PerlIOBuf base;
2425 NV next, every;
2426} PerlIOCede;
2427
2428static IV
2429PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2430{
2431 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2432
2433 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2434 self->next = nvtime () + self->every;
2435
2436 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2437}
2438
2439static SV *
2440PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2441{
2442 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2443
2444 return newSVnv (self->every);
2445}
2446
2447static IV
2448PerlIOCede_flush (pTHX_ PerlIO *f)
2449{
2450 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2451 double now = nvtime ();
2452
2453 if (now >= self->next)
2454 {
2455 api_cede (aTHX);
2456 self->next = now + self->every;
2457 }
2458
2459 return PerlIOBuf_flush (aTHX_ f);
2460}
2461
2462static PerlIO_funcs PerlIO_cede =
2463{
2464 sizeof(PerlIO_funcs),
2465 "cede",
2466 sizeof(PerlIOCede),
2467 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2468 PerlIOCede_pushed,
2469 PerlIOBuf_popped,
2470 PerlIOBuf_open,
2471 PerlIOBase_binmode,
2472 PerlIOCede_getarg,
2473 PerlIOBase_fileno,
2474 PerlIOBuf_dup,
2475 PerlIOBuf_read,
2476 PerlIOBuf_unread,
2477 PerlIOBuf_write,
2478 PerlIOBuf_seek,
2479 PerlIOBuf_tell,
2480 PerlIOBuf_close,
2481 PerlIOCede_flush,
2482 PerlIOBuf_fill,
2483 PerlIOBase_eof,
2484 PerlIOBase_error,
2485 PerlIOBase_clearerr,
2486 PerlIOBase_setlinebuf,
2487 PerlIOBuf_get_base,
2488 PerlIOBuf_bufsiz,
2489 PerlIOBuf_get_ptr,
2490 PerlIOBuf_get_cnt,
2491 PerlIOBuf_set_ptrcnt,
2492};
2493
2494/*****************************************************************************/
2495/* Coro::Semaphore & Coro::Signal */
2496
2497static SV *
2498coro_waitarray_new (pTHX_ int count)
2499{
2500 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2501 AV *av = newAV ();
2502 SV **ary;
2503
2504 /* unfortunately, building manually saves memory */
2505 Newx (ary, 2, SV *);
2506 AvALLOC (av) = ary;
2507#if PERL_VERSION_ATLEAST (5,10,0)
2508 AvARRAY (av) = ary;
2509#else
2510 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2511 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2512 SvPVX ((SV *)av) = (char *)ary;
2513#endif
2514 AvMAX (av) = 1;
2515 AvFILLp (av) = 0;
2516 ary [0] = newSViv (count);
2517
2518 return newRV_noinc ((SV *)av);
2519}
2520
2521/* semaphore */
2522
2523static void
2524coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2525{
2526 SV *count_sv = AvARRAY (av)[0];
2527 IV count = SvIVX (count_sv);
2528
2529 count += adjust;
2530 SvIVX (count_sv) = count;
2531
2532 /* now wake up as many waiters as are expected to lock */
2533 while (count > 0 && AvFILLp (av) > 0)
2534 {
2535 SV *cb;
2536
2537 /* swap first two elements so we can shift a waiter */
2538 AvARRAY (av)[0] = AvARRAY (av)[1];
2539 AvARRAY (av)[1] = count_sv;
2540 cb = av_shift (av);
2541
2542 if (SvOBJECT (cb))
2543 {
2544 api_ready (aTHX_ cb);
2545 --count;
2546 }
2547 else if (SvTYPE (cb) == SVt_PVCV)
2548 {
2549 dSP;
2550 PUSHMARK (SP);
2551 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2552 PUTBACK;
2553 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2554 }
2555
2556 SvREFCNT_dec (cb);
2557 }
2558}
2559
2560static void
2561coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2562{
2563 /* call $sem->adjust (0) to possibly wake up some other waiters */
2564 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2565}
2566
842static int 2567static int
843coro_state_dup (MAGIC *mg, CLONE_PARAMS *params) 2568slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
844{ 2569{
845 struct coro *coro = (struct coro *)mg->mg_ptr; 2570 AV *av = (AV *)frame->data;
2571 SV *count_sv = AvARRAY (av)[0];
846 2572
847 ++coro->refcnt; 2573 /* if we are about to throw, don't actually acquire the lock, just throw */
2574 if (CORO_THROW)
2575 return 0;
2576 else if (SvIVX (count_sv) > 0)
2577 {
2578 SvSTATE_current->on_destroy = 0;
2579
2580 if (acquire)
2581 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2582 else
2583 coro_semaphore_adjust (aTHX_ av, 0);
2584
2585 return 0;
2586 }
2587 else
2588 {
2589 int i;
2590 /* if we were woken up but can't down, we look through the whole */
2591 /* waiters list and only add us if we aren't in there already */
2592 /* this avoids some degenerate memory usage cases */
2593
2594 for (i = 1; i <= AvFILLp (av); ++i)
2595 if (AvARRAY (av)[i] == SvRV (coro_current))
2596 return 1;
2597
2598 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2599 return 1;
2600 }
2601}
2602
2603static int
2604slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2605{
2606 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2607}
2608
2609static int
2610slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2611{
2612 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2613}
2614
2615static void
2616slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2617{
2618 AV *av = (AV *)SvRV (arg [0]);
2619
2620 if (SvIVX (AvARRAY (av)[0]) > 0)
2621 {
2622 frame->data = (void *)av;
2623 frame->prepare = prepare_nop;
2624 }
2625 else
2626 {
2627 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2628
2629 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2630 frame->prepare = prepare_schedule;
2631
2632 /* to avoid race conditions when a woken-up coro gets terminated */
2633 /* we arrange for a temporary on_destroy that calls adjust (0) */
2634 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2635 }
2636}
2637
2638static void
2639slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2640{
2641 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2642 frame->check = slf_check_semaphore_down;
2643}
2644
2645static void
2646slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2647{
2648 if (items >= 2)
2649 {
2650 /* callback form */
2651 AV *av = (AV *)SvRV (arg [0]);
2652 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2653
2654 av_push (av, SvREFCNT_inc_NN (cb_cv));
2655
2656 if (SvIVX (AvARRAY (av)[0]) > 0)
2657 coro_semaphore_adjust (aTHX_ av, 0);
2658
2659 frame->prepare = prepare_nop;
2660 frame->check = slf_check_nop;
2661 }
2662 else
2663 {
2664 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2665 frame->check = slf_check_semaphore_wait;
2666 }
2667}
2668
2669/* signal */
2670
2671static void
2672coro_signal_wake (pTHX_ AV *av, int count)
2673{
2674 SvIVX (AvARRAY (av)[0]) = 0;
2675
2676 /* now signal count waiters */
2677 while (count > 0 && AvFILLp (av) > 0)
2678 {
2679 SV *cb;
2680
2681 /* swap first two elements so we can shift a waiter */
2682 cb = AvARRAY (av)[0];
2683 AvARRAY (av)[0] = AvARRAY (av)[1];
2684 AvARRAY (av)[1] = cb;
2685
2686 cb = av_shift (av);
2687
2688 if (SvTYPE (cb) == SVt_PVCV)
2689 {
2690 dSP;
2691 PUSHMARK (SP);
2692 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2693 PUTBACK;
2694 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2695 }
2696 else
2697 {
2698 api_ready (aTHX_ cb);
2699 sv_setiv (cb, 0); /* signal waiter */
2700 }
2701
2702 SvREFCNT_dec (cb);
2703
2704 --count;
2705 }
2706}
2707
2708static int
2709slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2710{
2711 /* if we are about to throw, also stop waiting */
2712 return SvROK ((SV *)frame->data) && !CORO_THROW;
2713}
2714
2715static void
2716slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2717{
2718 AV *av = (AV *)SvRV (arg [0]);
2719
2720 if (items >= 2)
2721 {
2722 CV *cb_cv = coro_sv_2cv (aTHX_ arg [1]);
2723 av_push (av, SvREFCNT_inc_NN (cb_cv));
2724
2725 if (SvIVX (AvARRAY (av)[0]))
2726 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2727
2728 frame->prepare = prepare_nop;
2729 frame->check = slf_check_nop;
2730 }
2731 else if (SvIVX (AvARRAY (av)[0]))
2732 {
2733 SvIVX (AvARRAY (av)[0]) = 0;
2734 frame->prepare = prepare_nop;
2735 frame->check = slf_check_nop;
2736 }
2737 else
2738 {
2739 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2740
2741 av_push (av, waiter);
2742
2743 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2744 frame->prepare = prepare_schedule;
2745 frame->check = slf_check_signal_wait;
2746 }
2747}
2748
2749/*****************************************************************************/
2750/* Coro::AIO */
2751
2752#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2753
2754/* helper storage struct */
2755struct io_state
2756{
2757 int errorno;
2758 I32 laststype; /* U16 in 5.10.0 */
2759 int laststatval;
2760 Stat_t statcache;
2761};
2762
2763static void
2764coro_aio_callback (pTHX_ CV *cv)
2765{
2766 dXSARGS;
2767 AV *state = (AV *)GENSUB_ARG;
2768 SV *coro = av_pop (state);
2769 SV *data_sv = newSV (sizeof (struct io_state));
2770
2771 av_extend (state, items - 1);
2772
2773 sv_upgrade (data_sv, SVt_PV);
2774 SvCUR_set (data_sv, sizeof (struct io_state));
2775 SvPOK_only (data_sv);
2776
2777 {
2778 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2779
2780 data->errorno = errno;
2781 data->laststype = PL_laststype;
2782 data->laststatval = PL_laststatval;
2783 data->statcache = PL_statcache;
2784 }
2785
2786 /* now build the result vector out of all the parameters and the data_sv */
2787 {
2788 int i;
2789
2790 for (i = 0; i < items; ++i)
2791 av_push (state, SvREFCNT_inc_NN (ST (i)));
2792 }
2793
2794 av_push (state, data_sv);
2795
2796 api_ready (aTHX_ coro);
2797 SvREFCNT_dec (coro);
2798 SvREFCNT_dec ((AV *)state);
2799}
2800
2801static int
2802slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2803{
2804 AV *state = (AV *)frame->data;
2805
2806 /* if we are about to throw, return early */
2807 /* this does not cancel the aio request, but at least */
2808 /* it quickly returns */
2809 if (CORO_THROW)
2810 return 0;
2811
2812 /* one element that is an RV? repeat! */
2813 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2814 return 1;
2815
2816 /* restore status */
2817 {
2818 SV *data_sv = av_pop (state);
2819 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2820
2821 errno = data->errorno;
2822 PL_laststype = data->laststype;
2823 PL_laststatval = data->laststatval;
2824 PL_statcache = data->statcache;
2825
2826 SvREFCNT_dec (data_sv);
2827 }
2828
2829 /* push result values */
2830 {
2831 dSP;
2832 int i;
2833
2834 EXTEND (SP, AvFILLp (state) + 1);
2835 for (i = 0; i <= AvFILLp (state); ++i)
2836 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2837
2838 PUTBACK;
2839 }
848 2840
849 return 0; 2841 return 0;
850} 2842}
851 2843
852static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
853
854static struct coro *
855SvSTATE (SV *coro)
856{
857 MAGIC *mg = SvMAGIC (SvROK (coro) ? SvRV (coro) : coro);
858 assert (mg->mg_type == PERL_MAGIC_ext);
859 return (struct coro *)mg->mg_ptr;
860}
861
862static void 2844static void
863api_transfer (pTHX_ SV *prev, SV *next, int flags) 2845slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
864{ 2846{
865 SV_CORO (prev, "Coro::transfer"); 2847 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
866 SV_CORO (next, "Coro::transfer"); 2848 SV *coro_hv = SvRV (coro_current);
2849 struct coro *coro = SvSTATE_hv (coro_hv);
867 2850
868 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 2851 /* put our coroutine id on the state arg */
869} 2852 av_push (state, SvREFCNT_inc_NN (coro_hv));
870 2853
871/** Coro ********************************************************************/ 2854 /* first see whether we have a non-zero priority and set it as AIO prio */
2855 if (coro->prio)
2856 {
2857 dSP;
872 2858
873#define PRIO_MAX 3 2859 static SV *prio_cv;
874#define PRIO_HIGH 1 2860 static SV *prio_sv;
875#define PRIO_NORMAL 0
876#define PRIO_LOW -1
877#define PRIO_IDLE -3
878#define PRIO_MIN -4
879 2861
880/* for Coro.pm */ 2862 if (expect_false (!prio_cv))
881static GV *coro_current, *coro_idle; 2863 {
882static AV *coro_ready [PRIO_MAX-PRIO_MIN+1]; 2864 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
883static int coro_nready; 2865 prio_sv = newSViv (0);
2866 }
884 2867
885static void 2868 PUSHMARK (SP);
886coro_enq (pTHX_ SV *sv) 2869 sv_setiv (prio_sv, coro->prio);
887{ 2870 XPUSHs (prio_sv);
888 int prio;
889 2871
890 if (SvTYPE (sv) != SVt_PVHV) 2872 PUTBACK;
891 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2873 call_sv (prio_cv, G_VOID | G_DISCARD);
2874 }
892 2875
2876 /* now call the original request */
893 { 2877 {
894 SV *coro = sv; 2878 dSP;
895 SV_CORO (coro, "omg"); 2879 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
896 prio = SvSTATE (coro)->prio; 2880 int i;
2881
2882 PUSHMARK (SP);
2883
2884 /* first push all args to the stack */
2885 EXTEND (SP, items + 1);
2886
2887 for (i = 0; i < items; ++i)
2888 PUSHs (arg [i]);
2889
2890 /* now push the callback closure */
2891 PUSHs (sv_2mortal (gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2892
2893 /* now call the AIO function - we assume our request is uncancelable */
2894 PUTBACK;
2895 call_sv ((SV *)req, G_VOID | G_DISCARD);
897 } 2896 }
898 2897
899 av_push (coro_ready [prio - PRIO_MIN], sv); 2898 /* now that the requets is going, we loop toll we have a result */
900 coro_nready++; 2899 frame->data = (void *)state;
2900 frame->prepare = prepare_schedule;
2901 frame->check = slf_check_aio_req;
901} 2902}
902 2903
903static SV *
904coro_deq (pTHX_ int min_prio)
905{
906 int prio = PRIO_MAX - PRIO_MIN;
907
908 min_prio -= PRIO_MIN;
909 if (min_prio < 0)
910 min_prio = 0;
911
912 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
913 if (AvFILLp (coro_ready [prio]) >= 0)
914 {
915 coro_nready--;
916 return av_shift (coro_ready [prio]);
917 }
918
919 return 0;
920}
921
922static void 2904static void
923api_ready (SV *coro) 2905coro_aio_req_xs (pTHX_ CV *cv)
924{ 2906{
925 dTHX; 2907 dXSARGS;
926 2908
927 if (SvROK (coro)) 2909 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
928 coro = SvRV (coro);
929 2910
930 LOCK; 2911 XSRETURN_EMPTY;
931 coro_enq (aTHX_ SvREFCNT_inc (coro));
932 UNLOCK;
933} 2912}
934 2913
935static void 2914/*****************************************************************************/
936api_schedule (void)
937{
938 dTHX;
939 2915
940 SV *prev, *next; 2916#if CORO_CLONE
2917# include "clone.c"
2918#endif
941 2919
942 LOCK;
943
944 prev = SvRV (GvSV (coro_current));
945 next = coro_deq (aTHX_ PRIO_MIN);
946
947 if (!next)
948 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
949
950 /* free this only after the transfer */
951 coro_mortal = prev;
952 SV_CORO (prev, "Coro::schedule");
953
954 SvRV (GvSV (coro_current)) = next;
955
956 SV_CORO (next, "Coro::schedule");
957
958 UNLOCK;
959
960 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
961 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
962}
963
964static void
965api_cede (void)
966{
967 dTHX;
968
969 LOCK;
970 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
971 UNLOCK;
972
973 api_schedule ();
974}
975
976MODULE = Coro::State PACKAGE = Coro::State 2920MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
977 2921
978PROTOTYPES: DISABLE 2922PROTOTYPES: DISABLE
979 2923
980BOOT: 2924BOOT:
981{ /* {} necessary for stoopid perl-5.6.x */ 2925{
982#ifdef USE_ITHREADS 2926#ifdef USE_ITHREADS
983 MUTEX_INIT (&coro_mutex); 2927# if CORO_PTHREAD
2928 coro_thx = PERL_GET_CONTEXT;
2929# endif
984#endif 2930#endif
985 BOOT_PAGESIZE; 2931 BOOT_PAGESIZE;
986 2932
987 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2933 cctx_current = cctx_new_empty ();
988 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2934
2935 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2936 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2937
2938 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2939 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2940 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
2941
2942 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
2943 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
2944 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
2945
989 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2946 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
990 2947
991 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2948 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
992 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2949 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
993 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2950 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
994 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2951 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
995 2952
996 main_mainstack = PL_mainstack; 2953 main_mainstack = PL_mainstack;
2954 main_top_env = PL_top_env;
997 2955
2956 while (main_top_env->je_prev)
2957 main_top_env = main_top_env->je_prev;
2958
2959 {
2960 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
2961
2962 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
2963 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
2964
2965 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
2966 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
2967 }
2968
998 coroapi.ver = CORO_API_VERSION; 2969 coroapi.ver = CORO_API_VERSION;
2970 coroapi.rev = CORO_API_REVISION;
2971
999 coroapi.transfer = api_transfer; 2972 coroapi.transfer = api_transfer;
1000 2973
2974 coroapi.sv_state = SvSTATE_;
2975 coroapi.execute_slf = api_execute_slf;
2976 coroapi.prepare_nop = prepare_nop;
2977 coroapi.prepare_schedule = prepare_schedule;
2978 coroapi.prepare_cede = prepare_cede;
2979 coroapi.prepare_cede_notself = prepare_cede_notself;
2980
2981 {
2982 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
2983
2984 if (!svp) croak ("Time::HiRes is required");
2985 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
2986
2987 nvtime = INT2PTR (double (*)(), SvIV (*svp));
2988 }
2989
1001 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL)); 2990 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
1002} 2991}
1003 2992
1004SV * 2993SV *
1005new (char *klass, ...) 2994new (char *klass, ...)
2995 ALIAS:
2996 Coro::new = 1
1006 CODE: 2997 CODE:
1007{ 2998{
1008 struct coro *coro; 2999 struct coro *coro;
3000 MAGIC *mg;
1009 HV *hv; 3001 HV *hv;
3002 CV *cb;
1010 int i; 3003 int i;
1011 3004
3005 if (items > 1)
3006 {
3007 cb = coro_sv_2cv (aTHX_ ST (1));
3008
3009 if (!ix)
3010 {
3011 if (CvISXSUB (cb))
3012 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3013
3014 if (!CvROOT (cb))
3015 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3016 }
3017 }
3018
1012 Newz (0, coro, 1, struct coro); 3019 Newz (0, coro, 1, struct coro);
1013 coro->args = newAV (); 3020 coro->args = newAV ();
3021 coro->flags = CF_NEW;
1014 3022
1015 for (i = 1; i < items; i++) 3023 if (coro_first) coro_first->prev = coro;
1016 av_push (coro->args, newSVsv (ST (i))); 3024 coro->next = coro_first;
3025 coro_first = coro;
1017 3026
1018 /*coro->mainstack = 0; *//*actual work is done inside transfer */
1019 /*coro->stack = 0;*/
1020
1021 hv = newHV (); 3027 coro->hv = hv = newHV ();
1022 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP; 3028 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3029 mg->mg_flags |= MGf_DUP;
1023 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1)); 3030 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
3031
3032 if (items > 1)
3033 {
3034 av_extend (coro->args, items - 1 + ix - 1);
3035
3036 if (ix)
3037 {
3038 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3039 cb = cv_coro_run;
3040 }
3041
3042 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3043
3044 for (i = 2; i < items; i++)
3045 av_push (coro->args, newSVsv (ST (i)));
3046 }
1024} 3047}
1025 OUTPUT: 3048 OUTPUT:
1026 RETVAL 3049 RETVAL
1027 3050
1028void 3051void
1029transfer(prev, next, flags) 3052transfer (...)
1030 SV *prev 3053 PROTOTYPE: $$
1031 SV *next 3054 CODE:
1032 int flags 3055 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3056
3057bool
3058_destroy (SV *coro_sv)
3059 CODE:
3060 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3061 OUTPUT:
3062 RETVAL
3063
3064void
3065_exit (int code)
3066 PROTOTYPE: $
3067 CODE:
3068 _exit (code);
3069
3070SV *
3071clone (Coro::State coro)
3072 CODE:
3073{
3074#if CORO_CLONE
3075 struct coro *ncoro = coro_clone (aTHX_ coro);
3076 MAGIC *mg;
3077 /* TODO: too much duplication */
3078 ncoro->hv = newHV ();
3079 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3080 mg->mg_flags |= MGf_DUP;
3081 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3082#else
3083 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3084#endif
3085}
3086 OUTPUT:
3087 RETVAL
3088
3089int
3090cctx_stacksize (int new_stacksize = 0)
3091 PROTOTYPE: ;$
3092 CODE:
3093 RETVAL = cctx_stacksize;
3094 if (new_stacksize)
3095 {
3096 cctx_stacksize = new_stacksize;
3097 ++cctx_gen;
3098 }
3099 OUTPUT:
3100 RETVAL
3101
3102int
3103cctx_max_idle (int max_idle = 0)
3104 PROTOTYPE: ;$
3105 CODE:
3106 RETVAL = cctx_max_idle;
3107 if (max_idle > 1)
3108 cctx_max_idle = max_idle;
3109 OUTPUT:
3110 RETVAL
3111
3112int
3113cctx_count ()
3114 PROTOTYPE:
3115 CODE:
3116 RETVAL = cctx_count;
3117 OUTPUT:
3118 RETVAL
3119
3120int
3121cctx_idle ()
3122 PROTOTYPE:
3123 CODE:
3124 RETVAL = cctx_idle;
3125 OUTPUT:
3126 RETVAL
3127
3128void
3129list ()
3130 PROTOTYPE:
3131 PPCODE:
3132{
3133 struct coro *coro;
3134 for (coro = coro_first; coro; coro = coro->next)
3135 if (coro->hv)
3136 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3137}
3138
3139void
3140call (Coro::State coro, SV *coderef)
3141 ALIAS:
3142 eval = 1
3143 CODE:
3144{
3145 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3146 {
3147 struct coro *current = SvSTATE_current;
3148
3149 if (current != coro)
3150 {
3151 PUTBACK;
3152 save_perl (aTHX_ current);
3153 load_perl (aTHX_ coro);
3154 SPAGAIN;
3155 }
3156
3157 PUSHSTACK;
3158
3159 PUSHMARK (SP);
3160 PUTBACK;
3161
3162 if (ix)
3163 eval_sv (coderef, 0);
3164 else
3165 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3166
3167 POPSTACK;
3168 SPAGAIN;
3169
3170 if (current != coro)
3171 {
3172 PUTBACK;
3173 save_perl (aTHX_ coro);
3174 load_perl (aTHX_ current);
3175 SPAGAIN;
3176 }
3177 }
3178}
3179
3180SV *
3181is_ready (Coro::State coro)
3182 PROTOTYPE: $
3183 ALIAS:
3184 is_ready = CF_READY
3185 is_running = CF_RUNNING
3186 is_new = CF_NEW
3187 is_destroyed = CF_DESTROYED
3188 is_suspended = CF_SUSPENDED
3189 CODE:
3190 RETVAL = boolSV (coro->flags & ix);
3191 OUTPUT:
3192 RETVAL
3193
3194void
3195throw (Coro::State self, SV *throw = &PL_sv_undef)
3196 PROTOTYPE: $;$
1033 CODE: 3197 CODE:
1034 PUTBACK; 3198{
1035 SV_CORO (next, "Coro::transfer"); 3199 struct coro *current = SvSTATE_current;
1036 SV_CORO (prev, "Coro::transfer"); 3200 SV **throwp = self == current ? &CORO_THROW : &self->except;
1037 coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3201 SvREFCNT_dec (*throwp);
1038 SPAGAIN; 3202 SvGETMAGIC (throw);
3203 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3204}
3205
3206void
3207api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3208 PROTOTYPE: $;$
3209 C_ARGS: aTHX_ coro, flags
3210
3211SV *
3212has_cctx (Coro::State coro)
3213 PROTOTYPE: $
3214 CODE:
3215 /* maybe manage the running flag differently */
3216 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3217 OUTPUT:
3218 RETVAL
3219
3220int
3221is_traced (Coro::State coro)
3222 PROTOTYPE: $
3223 CODE:
3224 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3225 OUTPUT:
3226 RETVAL
3227
3228UV
3229rss (Coro::State coro)
3230 PROTOTYPE: $
3231 ALIAS:
3232 usecount = 1
3233 CODE:
3234 switch (ix)
3235 {
3236 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3237 case 1: RETVAL = coro->usecount; break;
3238 }
3239 OUTPUT:
3240 RETVAL
3241
3242void
3243force_cctx ()
3244 PROTOTYPE:
3245 CODE:
3246 cctx_current->idle_sp = 0;
3247
3248void
3249swap_defsv (Coro::State self)
3250 PROTOTYPE: $
3251 ALIAS:
3252 swap_defav = 1
3253 CODE:
3254 if (!self->slot)
3255 croak ("cannot swap state with coroutine that has no saved state,");
3256 else
3257 {
3258 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3259 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3260
3261 SV *tmp = *src; *src = *dst; *dst = tmp;
3262 }
3263
3264void
3265cancel (Coro::State self)
3266 CODE:
3267 coro_state_destroy (aTHX_ self);
3268 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3269
3270
3271MODULE = Coro::State PACKAGE = Coro
3272
3273BOOT:
3274{
3275 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3276 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3277 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3278 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3279 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3280 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3281 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3282 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3283 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3284
3285 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3286 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3287 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3288 cv_coro_state_new = get_cv ("Coro::State::new", 0); SvREADONLY_on (cv_coro_state_new);
3289
3290 coro_stash = gv_stashpv ("Coro", TRUE);
3291
3292 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3293 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3294 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3295 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3296 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3297 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3298
3299 {
3300 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3301
3302 coroapi.schedule = api_schedule;
3303 coroapi.schedule_to = api_schedule_to;
3304 coroapi.cede = api_cede;
3305 coroapi.cede_notself = api_cede_notself;
3306 coroapi.ready = api_ready;
3307 coroapi.is_ready = api_is_ready;
3308 coroapi.nready = coro_nready;
3309 coroapi.current = coro_current;
3310
3311 /*GCoroAPI = &coroapi;*/
3312 sv_setiv (sv, (IV)&coroapi);
3313 SvREADONLY_on (sv);
3314 }
3315}
3316
3317void
3318terminate (...)
3319 CODE:
3320 CORO_EXECUTE_SLF_XS (slf_init_terminate);
3321
3322void
3323schedule (...)
3324 CODE:
3325 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3326
3327void
3328schedule_to (...)
3329 CODE:
3330 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3331
3332void
3333cede_to (...)
3334 CODE:
3335 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3336
3337void
3338cede (...)
3339 CODE:
3340 CORO_EXECUTE_SLF_XS (slf_init_cede);
3341
3342void
3343cede_notself (...)
3344 CODE:
3345 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3346
3347void
3348_set_current (SV *current)
3349 PROTOTYPE: $
3350 CODE:
3351 SvREFCNT_dec (SvRV (coro_current));
3352 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
3353
3354void
3355_set_readyhook (SV *hook)
3356 PROTOTYPE: $
3357 CODE:
3358 SvREFCNT_dec (coro_readyhook);
3359 SvGETMAGIC (hook);
3360 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1039 3361
1040int 3362int
1041prio (Coro::State coro, int newprio = 0) 3363prio (Coro::State coro, int newprio = 0)
3364 PROTOTYPE: $;$
1042 ALIAS: 3365 ALIAS:
1043 nice = 1 3366 nice = 1
1044 CODE: 3367 CODE:
1045{ 3368{
1046 RETVAL = coro->prio; 3369 RETVAL = coro->prio;
1047 3370
1048 if (items > 1) 3371 if (items > 1)
1049 { 3372 {
1050 if (ix) 3373 if (ix)
1051 newprio += coro->prio; 3374 newprio = coro->prio - newprio;
1052 3375
1053 if (newprio < PRIO_MIN) newprio = PRIO_MIN; 3376 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
1054 if (newprio > PRIO_MAX) newprio = PRIO_MAX; 3377 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
1055 3378
1056 coro->prio = newprio; 3379 coro->prio = newprio;
1057 } 3380 }
1058} 3381}
3382 OUTPUT:
3383 RETVAL
1059 3384
1060void 3385SV *
1061_clone_state_from (SV *dst, SV *src) 3386ready (SV *self)
1062 CODE:
1063{
1064 struct coro *coro_src = SvSTATE (src);
1065
1066 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1067
1068 ++coro_src->refcnt;
1069 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1070}
1071
1072void
1073_exit (code)
1074 int code
1075 PROTOTYPE: $ 3387 PROTOTYPE: $
1076 CODE: 3388 CODE:
1077 _exit (code); 3389 RETVAL = boolSV (api_ready (aTHX_ self));
1078 3390 OUTPUT:
1079MODULE = Coro::State PACKAGE = Coro::Cont 3391 RETVAL
1080
1081void
1082yield (...)
1083 PROTOTYPE: @
1084 CODE:
1085 SV *yieldstack;
1086 SV *sv;
1087 AV *defav = GvAV (PL_defgv);
1088 struct coro *prev, *next;
1089
1090 yieldstack = *hv_fetch (
1091 (HV *)SvRV (GvSV (coro_current)),
1092 "yieldstack", sizeof ("yieldstack") - 1,
1093 0
1094 );
1095
1096 /* set up @_ -- ugly */
1097 av_clear (defav);
1098 av_fill (defav, items - 1);
1099 while (items--)
1100 av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102 sv = av_pop ((AV *)SvRV (yieldstack));
1103 prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1104 next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1105 SvREFCNT_dec (sv);
1106
1107 coro_state_transfer (aTHX_ prev, next, 0);
1108
1109MODULE = Coro::State PACKAGE = Coro
1110
1111BOOT:
1112{
1113 int i;
1114 HV *stash = gv_stashpv ("Coro", TRUE);
1115
1116 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1117 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1118 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1119 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1120 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1121 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1122
1123 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1124 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1125
1126 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1127 coro_ready[i] = newAV ();
1128
1129 {
1130 SV *sv = perl_get_sv("Coro::API", 1);
1131
1132 coroapi.schedule = api_schedule;
1133 coroapi.cede = api_cede;
1134 coroapi.ready = api_ready;
1135 coroapi.nready = &coro_nready;
1136 coroapi.current = coro_current;
1137
1138 GCoroAPI = &coroapi;
1139 sv_setiv (sv, (IV)&coroapi);
1140 SvREADONLY_on (sv);
1141 }
1142}
1143
1144#if !PERL_MICRO
1145
1146void
1147ready (self)
1148 SV * self
1149 PROTOTYPE: $
1150 CODE:
1151 api_ready (self);
1152
1153#endif
1154 3392
1155int 3393int
1156nready (...) 3394nready (...)
1157 PROTOTYPE: 3395 PROTOTYPE:
1158 CODE: 3396 CODE:
1159 RETVAL = coro_nready; 3397 RETVAL = coro_nready;
1160 OUTPUT: 3398 OUTPUT:
1161 RETVAL 3399 RETVAL
1162 3400
1163void 3401void
1164schedule (...) 3402suspend (Coro::State self)
1165 PROTOTYPE: 3403 PROTOTYPE: $
1166 CODE: 3404 CODE:
1167 api_schedule (); 3405 self->flags |= CF_SUSPENDED;
1168 3406
1169void 3407void
1170cede (...) 3408resume (Coro::State self)
1171 PROTOTYPE: 3409 PROTOTYPE: $
1172 CODE: 3410 CODE:
1173 api_cede (); 3411 self->flags &= ~CF_SUSPENDED;
1174 3412
1175# and these are hacks 3413void
3414_pool_handler (...)
3415 CODE:
3416 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3417
3418void
3419async_pool (SV *cv, ...)
3420 PROTOTYPE: &@
3421 PPCODE:
3422{
3423 HV *hv = (HV *)av_pop (av_async_pool);
3424 AV *av = newAV ();
3425 SV *cb = ST (0);
3426 int i;
3427
3428 av_extend (av, items - 2);
3429 for (i = 1; i < items; ++i)
3430 av_push (av, SvREFCNT_inc_NN (ST (i)));
3431
3432 if ((SV *)hv == &PL_sv_undef)
3433 {
3434 PUSHMARK (SP);
3435 EXTEND (SP, 2);
3436 PUSHs (sv_Coro);
3437 PUSHs ((SV *)cv_pool_handler);
3438 PUTBACK;
3439 call_sv ((SV *)cv_coro_state_new, G_SCALAR);
3440 SPAGAIN;
3441
3442 hv = (HV *)SvREFCNT_inc_NN (SvRV (POPs));
3443 }
3444
3445 {
3446 struct coro *coro = SvSTATE_hv (hv);
3447
3448 assert (!coro->invoke_cb);
3449 assert (!coro->invoke_av);
3450 coro->invoke_cb = SvREFCNT_inc (cb);
3451 coro->invoke_av = av;
3452 }
3453
3454 api_ready (aTHX_ (SV *)hv);
3455
3456 if (GIMME_V != G_VOID)
3457 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3458 else
3459 SvREFCNT_dec (hv);
3460}
3461
1176SV * 3462SV *
1177_aio_get_state () 3463rouse_cb ()
3464 PROTOTYPE:
1178 CODE: 3465 CODE:
1179{ 3466 RETVAL = coro_new_rouse_cb (aTHX);
1180 struct {
1181 int errorno;
1182 int laststype;
1183 int laststatval;
1184 Stat_t statcache;
1185 } data;
1186
1187 data.errorno = errno;
1188 data.laststype = PL_laststype;
1189 data.laststatval = PL_laststatval;
1190 data.statcache = PL_statcache;
1191
1192 RETVAL = newSVpvn ((char *)&data, sizeof data);
1193}
1194 OUTPUT: 3467 OUTPUT:
1195 RETVAL 3468 RETVAL
1196 3469
1197void 3470void
1198_aio_set_state (char *data_) 3471rouse_wait (...)
3472 PROTOTYPE: ;$
3473 PPCODE:
3474 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3475
3476void
3477on_enter (SV *block)
3478 ALIAS:
3479 on_leave = 1
1199 PROTOTYPE: $ 3480 PROTOTYPE: &
1200 CODE: 3481 CODE:
1201{ 3482{
1202 struct { 3483 struct coro *coro = SvSTATE_current;
3484 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3485
3486 block = (SV *)coro_sv_2cv (aTHX_ block);
3487
3488 if (!*avp)
3489 *avp = newAV ();
3490
3491 av_push (*avp, SvREFCNT_inc (block));
3492
3493 if (!ix)
3494 on_enterleave_call (aTHX_ block);
3495
3496 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3497 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3498 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3499}
3500
3501
3502MODULE = Coro::State PACKAGE = PerlIO::cede
3503
3504BOOT:
3505 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3506
3507
3508MODULE = Coro::State PACKAGE = Coro::Semaphore
3509
3510SV *
3511new (SV *klass, SV *count = 0)
3512 CODE:
3513{
3514 int semcnt = 1;
3515
3516 if (count)
3517 {
3518 SvGETMAGIC (count);
3519
3520 if (SvOK (count))
3521 semcnt = SvIV (count);
3522 }
3523
3524 RETVAL = sv_bless (
3525 coro_waitarray_new (aTHX_ semcnt),
3526 GvSTASH (CvGV (cv))
3527 );
3528}
3529 OUTPUT:
3530 RETVAL
3531
3532# helper for Coro::Channel and others
3533SV *
3534_alloc (int count)
3535 CODE:
3536 RETVAL = coro_waitarray_new (aTHX_ count);
3537 OUTPUT:
3538 RETVAL
3539
3540SV *
3541count (SV *self)
3542 CODE:
3543 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3544 OUTPUT:
3545 RETVAL
3546
3547void
3548up (SV *self, int adjust = 1)
3549 ALIAS:
3550 adjust = 1
3551 CODE:
3552 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3553
3554void
3555down (...)
3556 CODE:
3557 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3558
3559void
3560wait (...)
3561 CODE:
3562 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3563
3564void
3565try (SV *self)
3566 PPCODE:
3567{
3568 AV *av = (AV *)SvRV (self);
3569 SV *count_sv = AvARRAY (av)[0];
3570 IV count = SvIVX (count_sv);
3571
3572 if (count > 0)
3573 {
3574 --count;
3575 SvIVX (count_sv) = count;
3576 XSRETURN_YES;
3577 }
3578 else
3579 XSRETURN_NO;
3580}
3581
3582void
3583waiters (SV *self)
3584 PPCODE:
3585{
3586 AV *av = (AV *)SvRV (self);
3587 int wcount = AvFILLp (av) + 1 - 1;
3588
3589 if (GIMME_V == G_SCALAR)
3590 XPUSHs (sv_2mortal (newSViv (wcount)));
3591 else
3592 {
1203 int errorno; 3593 int i;
1204 int laststype; 3594 EXTEND (SP, wcount);
1205 int laststatval; 3595 for (i = 1; i <= wcount; ++i)
1206 Stat_t statcache; 3596 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
1207 } *data = (void *)data_; 3597 }
1208
1209 errno = data->errorno;
1210 PL_laststype = data->laststype;
1211 PL_laststatval = data->laststatval;
1212 PL_statcache = data->statcache;
1213} 3598}
3599
3600MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3601
3602void
3603_may_delete (SV *sem, int count, int extra_refs)
3604 PPCODE:
3605{
3606 AV *av = (AV *)SvRV (sem);
3607
3608 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3609 && AvFILLp (av) == 0 /* no waiters, just count */
3610 && SvIV (AvARRAY (av)[0]) == count)
3611 XSRETURN_YES;
3612
3613 XSRETURN_NO;
3614}
3615
3616MODULE = Coro::State PACKAGE = Coro::Signal
3617
3618SV *
3619new (SV *klass)
3620 CODE:
3621 RETVAL = sv_bless (
3622 coro_waitarray_new (aTHX_ 0),
3623 GvSTASH (CvGV (cv))
3624 );
3625 OUTPUT:
3626 RETVAL
3627
3628void
3629wait (...)
3630 CODE:
3631 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3632
3633void
3634broadcast (SV *self)
3635 CODE:
3636{
3637 AV *av = (AV *)SvRV (self);
3638 coro_signal_wake (aTHX_ av, AvFILLp (av));
3639}
3640
3641void
3642send (SV *self)
3643 CODE:
3644{
3645 AV *av = (AV *)SvRV (self);
3646
3647 if (AvFILLp (av))
3648 coro_signal_wake (aTHX_ av, 1);
3649 else
3650 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3651}
3652
3653IV
3654awaited (SV *self)
3655 CODE:
3656 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3657 OUTPUT:
3658 RETVAL
3659
3660
3661MODULE = Coro::State PACKAGE = Coro::AnyEvent
3662
3663BOOT:
3664 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3665
3666void
3667_schedule (...)
3668 CODE:
3669{
3670 static int incede;
3671
3672 api_cede_notself (aTHX);
3673
3674 ++incede;
3675 while (coro_nready >= incede && api_cede (aTHX))
3676 ;
3677
3678 sv_setsv (sv_activity, &PL_sv_undef);
3679 if (coro_nready >= incede)
3680 {
3681 PUSHMARK (SP);
3682 PUTBACK;
3683 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3684 }
3685
3686 --incede;
3687}
3688
3689
3690MODULE = Coro::State PACKAGE = Coro::AIO
3691
3692void
3693_register (char *target, char *proto, SV *req)
3694 CODE:
3695{
3696 CV *req_cv = coro_sv_2cv (aTHX_ req);
3697 /* newXSproto doesn't return the CV on 5.8 */
3698 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3699 sv_setpv ((SV *)slf_cv, proto);
3700 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3701}
3702

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