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Comparing Coro/Coro/State.xs (file contents):
Revision 1.30 by root, Sat Aug 25 22:19:05 2001 UTC vs.
Revision 1.359 by root, Mon Jun 29 05:07:19 2009 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
6 12
7#include <signal.h> 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
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# 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
19#endif 43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
20 48
21#define MAY_FLUSH /* increases codesize and is rarely used */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
22 52
23#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 54static int cctx_max_idle = 4;
25 55
26/* The next macro should declare a variable stacklevel that contains and approximation 56#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 57 (PERL_REVISION > (a) \
28 * and should be unique. */ 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERL_SUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100#ifndef CvISXSUB_on
101# define CvISXSUB_on(cv) (void)cv
102#endif
103#ifndef CvISXSUB
104# define CvISXSUB(cv) (CvXSUB (cv) ? TRUE : FALSE)
105#endif
106#ifndef Newx
107# define Newx(ptr,nitems,type) New (0,ptr,nitems,type)
108#endif
109
110/* 5.8.7 */
111#ifndef SvRV_set
112# define SvRV_set(s,v) SvRV(s) = (v)
113#endif
114
115#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
116# undef CORO_STACKGUARD
117#endif
118
119#ifndef CORO_STACKGUARD
120# define CORO_STACKGUARD 0
121#endif
122
123/* prefer perl internal functions over our own? */
124#ifndef CORO_PREFER_PERL_FUNCTIONS
125# define CORO_PREFER_PERL_FUNCTIONS 0
126#endif
127
128/* The next macros try to return the current stack pointer, in an as
129 * portable way as possible. */
130#if __GNUC__ >= 4
131# define dSTACKLEVEL int stacklevel_dummy
132# define STACKLEVEL __builtin_frame_address (0)
133#else
134# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 135# define STACKLEVEL ((void *)&stacklevel)
136#endif
30 137
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 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))
32 154
33#include "CoroAPI.h" 155#include "CoroAPI.h"
156#define GCoroAPI (&coroapi) /* very sneaky */
34 157
158#ifdef USE_ITHREADS
159# if CORO_PTHREAD
160static void *coro_thx;
161# endif
162#endif
163
164#ifdef __linux
165# include <time.h> /* for timespec */
166# include <syscall.h> /* for SYS_* */
167# ifdef SYS_clock_gettime
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
171# endif
172#endif
173
174static double (*nvtime)(); /* so why doesn't it take void? */
175
176/* we hijack an hopefully unused CV flag for our purposes */
177#define CVf_SLF 0x4000
178static OP *pp_slf (pTHX);
179
180static U32 cctx_gen;
181static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 182static struct CoroAPI coroapi;
183static AV *main_mainstack; /* used to differentiate between $main and others */
184static JMPENV *main_top_env;
185static HV *coro_state_stash, *coro_stash;
186static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 187
37/* 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 */
38typedef struct { 227typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 228{
40 int usecnt; /* shared by how many coroutines */ 229 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 230
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;
43 coro_context cctx; 239 coro_context cctx;
44 240
45 void *sptr; 241 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 242#if CORO_USE_VALGRIND
47} coro_stack; 243 int valgrind_id;
244#endif
245 unsigned char flags;
246} coro_cctx;
48 247
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 */
49struct coro { 276struct coro {
50 /* the optional C context */ 277 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 278 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 279
55 /* optionally saved, might be zero */ 280 /* ready queue */
56 AV *defav; 281 struct coro *next_ready;
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63 282
64 /* the stacks and related info (callchain etc..) */ 283 /* state data */
65 PERL_SI *curstackinfo; 284 struct CoroSLF slf_frame; /* saved slf frame */
66 AV *curstack;
67 AV *mainstack; 285 AV *mainstack;
68 SV **stack_sp; 286 perl_slots *slot; /* basically the saved sp */
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 287
288 CV *startcv; /* the CV to execute */
92 /* data associated with this coroutine (initial args) */ 289 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 290 int refcnt; /* coroutines are refcounted, yes */
291 int flags; /* CF_ flags */
292 HV *hv; /* the perl hash associated with this coro, if any */
293 void (*on_destroy)(pTHX_ struct coro *coro);
294
295 /* statistics */
296 int usecount; /* number of transfers to this coro */
297
298 /* coro process data */
299 int prio;
300 SV *except; /* exception to be thrown */
301 SV *rouse_cb;
302
303 /* async_pool */
304 SV *saved_deffh;
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;
94}; 314};
95 315
96typedef struct coro *Coro__State; 316typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 317typedef struct coro *Coro__State_or_hashref;
98 318
99static AV *main_mainstack; /* used to differentiate between $main and others */ 319/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 320/* and get copied between struct coro and these variables */
101static SV *ucoro_state_sv; 321/* the mainr easonw e don't support windows process emulation */
102static U32 ucoro_state_hash; 322static struct CoroSLF slf_frame; /* the current slf frame */
103static HV *padlist_cache;
104 323
105/* mostly copied from op.c:cv_clone2 */ 324/** Coro ********************************************************************/
106STATIC AV * 325
107clone_padlist (AV *protopadlist) 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)
108{ 345{
109 AV *av; 346#if PERL_VERSION_ATLEAST (5,10,0)
110 I32 ix; 347 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 348 get_sv (name, create);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 349#endif
113 SV **pname = AvARRAY (protopad_name); 350 return get_sv (name, create);
114 SV **ppad = AvARRAY (protopad); 351}
115 I32 fname = AvFILLp (protopad_name); 352
116 I32 fpad = AvFILLp (protopad); 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 *
440coro_derive_padlist (pTHX_ CV *cv)
441{
442 AV *padlist = CvPADLIST (cv);
117 AV *newpadlist, *newpad_name, *newpad; 443 AV *newpadlist, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127 444
128 newpadlist = newAV (); 445 newpadlist = newAV ();
129 AvREAL_off (newpadlist); 446 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name); 447#if PERL_VERSION_ATLEAST (5,10,0)
448 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
449#else
450 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
451#endif
452 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
453 --AvFILLp (padlist);
454
455 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
131 av_store (newpadlist, 1, (SV *) newpad); 456 av_store (newpadlist, 1, (SV *)newpad);
132 457
133 av = newAV (); /* will be @_ */ 458 return newpadlist;
134 av_extend (av, 0); 459}
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137 460
138 for (ix = fpad; ix > 0; ix--) 461static void
462free_padlist (pTHX_ AV *padlist)
463{
464 /* may be during global destruction */
465 if (!IN_DESTRUCT)
139 { 466 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 467 I32 i = AvFILLp (padlist);
141 if (namesv && namesv != &PL_sv_undef) 468
469 while (i > 0) /* special-case index 0 */
142 { 470 {
143 char *name = SvPVX (namesv); /* XXX */ 471 /* we try to be extra-careful here */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 472 AV *av = (AV *)AvARRAY (padlist)[i--];
145 { /* lexical from outside? */ 473 I32 j = AvFILLp (av);
146 npad[ix] = SvREFCNT_inc (ppad[ix]); 474
147 } 475 while (j >= 0)
148 else 476 SvREFCNT_dec (AvARRAY (av)[j--]);
149 { /* our own lexical */ 477
150 SV *sv; 478 AvFILLp (av) = -1;
151 if (*name == '&') 479 SvREFCNT_dec (av);
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 } 480 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175 481
176#if 0 /* return -ENOTUNDERSTOOD */ 482 SvREFCNT_dec (AvARRAY (padlist)[0]);
177 /* Now that vars are all in place, clone nested closures. */
178 483
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC void
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist); 484 AvFILLp (padlist) = -1;
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist); 485 SvREFCNT_dec ((SV*)padlist);
216 } 486 }
217} 487}
218#endif 488
489static int
490coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
491{
492 AV *padlist;
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;
498
499 /* casting is fun. */
500 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
501 free_padlist (aTHX_ padlist);
502
503 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
504
505 return 0;
506}
507
508static MGVTBL coro_cv_vtbl = {
509 0, 0, 0, 0,
510 coro_cv_free
511};
219 512
220/* the next two functions merely cache the padlists */ 513/* the next two functions merely cache the padlists */
221STATIC void 514static void
222get_padlist (CV *cv) 515get_padlist (pTHX_ CV *cv)
223{ 516{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 517 MAGIC *mg = CORO_MAGIC_cv (cv);
518 AV *av;
225 519
226 if (he && AvFILLp ((AV *)*he) >= 0) 520 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 521 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
228 else 522 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 { 523 {
524#if CORO_PREFER_PERL_FUNCTIONS
525 /* this is probably cleaner? but also slower! */
526 /* in practise, it seems to be less stable */
527 CV *cp = Perl_cv_clone (aTHX_ cv);
528 CvPADLIST (cv) = CvPADLIST (cp);
529 CvPADLIST (cp) = 0;
239 SvREFCNT_dec (*he); 530 SvREFCNT_dec (cp);
240 *he = (SV *)newAV (); 531#else
532 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
533#endif
241 } 534 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244} 535}
245 536
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void 537static void
538put_padlist (pTHX_ CV *cv)
539{
540 MAGIC *mg = CORO_MAGIC_cv (cv);
541 AV *av;
542
543 if (expect_false (!mg))
544 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
545
546 av = (AV *)mg->mg_obj;
547
548 if (expect_false (AvFILLp (av) >= AvMAX (av)))
549 av_extend (av, AvFILLp (av) + 1);
550
551 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
552}
553
554/** load & save, init *******************************************************/
555
556static void
557on_enterleave_call (pTHX_ SV *cb);
558
559static void
281load_state(pTHX_ Coro__State c) 560load_perl (pTHX_ Coro__State c)
282{ 561{
283 PL_dowarn = c->dowarn; 562 perl_slots *slot = c->slot;
284 PL_in_eval = c->in_eval; 563 c->slot = 0;
285 564
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack; 565 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312 566
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 567 GvSV (PL_defgv) = slot->defsv;
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 568 GvAV (PL_defgv) = slot->defav;
315 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
316 576
317 { 577 {
318 dSP; 578 dSP;
579
319 CV *cv; 580 CV *cv;
320 581
321 /* now do the ugly restore mess */ 582 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs)) 583 while (expect_true (cv = (CV *)POPs))
323 { 584 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */ 585 put_padlist (aTHX_ cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist; 586 CvDEPTH (cv) = PTR2IV (POPs);
330#ifdef USE_THREADS 587 CvPADLIST (cv) = (AV *)POPs;
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 } 588 }
337 589
338 PUTBACK; 590 PUTBACK;
339 } 591 }
340}
341 592
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
342static void 605static void
343save_state(pTHX_ Coro__State c, int flags) 606save_perl (pTHX_ Coro__State c)
344{ 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
345 { 619 {
346 dSP; 620 dSP;
347 I32 cxix = cxstack_ix; 621 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack; 622 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo; 623 PERL_SI *top_si = PL_curstackinfo;
… …
351 /* 625 /*
352 * 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
353 * (and reinitialize) all cv's in the whole callchain :( 627 * (and reinitialize) all cv's in the whole callchain :(
354 */ 628 */
355 629
356 PUSHs (Nullsv); 630 XPUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 631 /* this loop was inspired by pp_caller */
358 for (;;) 632 for (;;)
359 { 633 {
360 while (cxix >= 0) 634 while (expect_true (cxix >= 0))
361 { 635 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 636 PERL_CONTEXT *cx = &ccstk[cxix--];
363 637
364 if (CxTYPE(cx) == CXt_SUB) 638 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
365 { 639 {
366 CV *cv = cx->blk_sub.cv; 640 CV *cv = cx->blk_sub.cv;
641
367 if (CvDEPTH(cv)) 642 if (expect_true (CvDEPTH (cv)))
368 { 643 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2); 644 EXTEND (SP, 3);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv)); 645 PUSHs ((SV *)CvPADLIST (cv));
646 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
384 PUSHs ((SV *)cv); 647 PUSHs ((SV *)cv);
385 648
386 get_padlist (cv); /* this is a monster */ 649 CvDEPTH (cv) = 0;
650 get_padlist (aTHX_ cv);
387 } 651 }
388 } 652 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 } 653 }
396 654
397 if (top_si->si_type == PERLSI_MAIN) 655 if (expect_true (top_si->si_type == PERLSI_MAIN))
398 break; 656 break;
399 657
400 top_si = top_si->si_prev; 658 top_si = top_si->si_prev;
401 ccstk = top_si->si_cxstack; 659 ccstk = top_si->si_cxstack;
402 cxix = top_si->si_cxix; 660 cxix = top_si->si_cxix;
403 } 661 }
404 662
405 PUTBACK; 663 PUTBACK;
406 } 664 }
407 665
408 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 666 /* allocate some space on the context stack for our purposes */
409 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 667 /* we manually unroll here, as usually 2 slots is enough */
410 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 */
411 677
412 c->dowarn = PL_dowarn;
413 c->in_eval = PL_in_eval;
414
415 c->curstackinfo = PL_curstackinfo;
416 c->curstack = PL_curstack;
417 c->mainstack = PL_mainstack; 678 c->mainstack = PL_mainstack;
418 c->stack_sp = PL_stack_sp; 679
419 c->op = PL_op; 680 {
420 c->curpad = PL_curpad; 681 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
421 c->stack_base = PL_stack_base; 682
422 c->stack_max = PL_stack_max; 683 slot->defav = GvAV (PL_defgv);
423 c->tmps_stack = PL_tmps_stack; 684 slot->defsv = DEFSV;
424 c->tmps_floor = PL_tmps_floor; 685 slot->errsv = ERRSV;
425 c->tmps_ix = PL_tmps_ix; 686 slot->irsgv = GvSV (irsgv);
426 c->tmps_max = PL_tmps_max; 687 slot->hinthv = GvHV (PL_hintgv);
427 c->markstack = PL_markstack; 688
428 c->markstack_ptr = PL_markstack_ptr; 689 #define VAR(name,type) slot->name = PL_ ## name;
429 c->markstack_max = PL_markstack_max; 690 # include "state.h"
430 c->scopestack = PL_scopestack; 691 #undef VAR
431 c->scopestack_ix = PL_scopestack_ix; 692 }
432 c->scopestack_max = PL_scopestack_max;
433 c->savestack = PL_savestack;
434 c->savestack_ix = PL_savestack_ix;
435 c->savestack_max = PL_savestack_max;
436 c->retstack = PL_retstack;
437 c->retstack_ix = PL_retstack_ix;
438 c->retstack_max = PL_retstack_max;
439 c->curcop = PL_curcop;
440 c->top_env = PL_top_env;
441} 693}
442 694
443/* 695/*
444 * allocate various perl stacks. This is an exact copy 696 * allocate various perl stacks. This is almost an exact copy
445 * of perl.c:init_stacks, except that it uses less memory 697 * of perl.c:init_stacks, except that it uses less memory
446 * on the assumption that coroutines do not usually need 698 * on the (sometimes correct) assumption that coroutines do
447 * a lot of stackspace. 699 * not usually need a lot of stackspace.
448 */ 700 */
449STATIC void 701#if CORO_PREFER_PERL_FUNCTIONS
702# define coro_init_stacks(thx) init_stacks ()
703#else
704static void
450coro_init_stacks (pTHX) 705coro_init_stacks (pTHX)
451{ 706{
452 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 707 PL_curstackinfo = new_stackinfo(32, 8);
453 PL_curstackinfo->si_type = PERLSI_MAIN; 708 PL_curstackinfo->si_type = PERLSI_MAIN;
454 PL_curstack = PL_curstackinfo->si_stack; 709 PL_curstack = PL_curstackinfo->si_stack;
455 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 710 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456 711
457 PL_stack_base = AvARRAY(PL_curstack); 712 PL_stack_base = AvARRAY(PL_curstack);
458 PL_stack_sp = PL_stack_base; 713 PL_stack_sp = PL_stack_base;
459 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 714 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460 715
461 New(50,PL_tmps_stack,96,SV*); 716 New(50,PL_tmps_stack,32,SV*);
462 PL_tmps_floor = -1; 717 PL_tmps_floor = -1;
463 PL_tmps_ix = -1; 718 PL_tmps_ix = -1;
464 PL_tmps_max = 96; 719 PL_tmps_max = 32;
465 720
466 New(54,PL_markstack,16,I32); 721 New(54,PL_markstack,16,I32);
467 PL_markstack_ptr = PL_markstack; 722 PL_markstack_ptr = PL_markstack;
468 PL_markstack_max = PL_markstack + 16; 723 PL_markstack_max = PL_markstack + 16;
469 724
725#ifdef SET_MARK_OFFSET
470 SET_MARK_OFFSET; 726 SET_MARK_OFFSET;
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
737#if !PERL_VERSION_ATLEAST (5,10,0)
480 New(54,PL_retstack,8,OP*); 738 New(54,PL_retstack,4,OP*);
481 PL_retstack_ix = 0; 739 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 740 PL_retstack_max = 4;
741#endif
483} 742}
743#endif
484 744
485/* 745/*
486 * destroy the stacks, the callchain etc... 746 * destroy the stacks, the callchain etc...
487 * still there is a memleak of 128 bytes...
488 */ 747 */
489STATIC void 748static void
490destroy_stacks(pTHX) 749coro_destruct_stacks (pTHX)
491{ 750{
492 /* is this ugly, I ask? */
493 while (PL_scopestack_ix)
494 LEAVE;
495
496 /* sure it is, but more important: is it correct?? :/ */
497 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
498 FREETMPS;
499
500 while (PL_curstackinfo->si_next) 751 while (PL_curstackinfo->si_next)
501 PL_curstackinfo = PL_curstackinfo->si_next; 752 PL_curstackinfo = PL_curstackinfo->si_next;
502 753
503 while (PL_curstackinfo) 754 while (PL_curstackinfo)
504 { 755 {
505 PERL_SI *p = PL_curstackinfo->si_prev; 756 PERL_SI *p = PL_curstackinfo->si_prev;
506 757
507 { 758 if (!IN_DESTRUCT)
508 dSP;
509 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
510 PUTBACK; /* possibly superfluous */
511 }
512
513 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
514 dounwind(-1);
515
516 SvREFCNT_dec(PL_curstackinfo->si_stack); 759 SvREFCNT_dec (PL_curstackinfo->si_stack);
760
517 Safefree(PL_curstackinfo->si_cxstack); 761 Safefree (PL_curstackinfo->si_cxstack);
518 Safefree(PL_curstackinfo); 762 Safefree (PL_curstackinfo);
519 PL_curstackinfo = p; 763 PL_curstackinfo = p;
520 } 764 }
521 765
522 Safefree(PL_tmps_stack); 766 Safefree (PL_tmps_stack);
523 Safefree(PL_markstack); 767 Safefree (PL_markstack);
524 Safefree(PL_scopestack); 768 Safefree (PL_scopestack);
525 Safefree(PL_savestack); 769 Safefree (PL_savestack);
770#if !PERL_VERSION_ATLEAST (5,10,0)
526 Safefree(PL_retstack); 771 Safefree (PL_retstack);
527}
528
529static void
530allocate_stack (Coro__State ctx, int alloc)
531{
532 coro_stack *stack;
533
534 New (0, stack, 1, coro_stack);
535
536 stack->refcnt = 1;
537 stack->usecnt = 1;
538 stack->gencnt = ctx->gencnt = 0;
539 if (alloc)
540 {
541#ifdef HAVE_MMAP
542 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
543 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
544 if (stack->sptr == (void *)-1)
545#endif 772#endif
773}
774
775#define CORO_RSS \
776 rss += sizeof (SYM (curstackinfo)); \
777 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
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);
783
784static size_t
785coro_rss (pTHX_ struct coro *coro)
786{
787 size_t rss = sizeof (*coro);
788
789 if (coro->mainstack)
790 {
791 if (coro->flags & CF_RUNNING)
546 { 792 {
547 /*FIXME*//*D*//* reasonable stack size! */ 793 #define SYM(sym) PL_ ## sym
548 stack->ssize = -4096 * sizeof (long); 794 CORO_RSS;
549 New (0, stack->sptr, 4096, long); 795 #undef SYM
550 } 796 }
551 }
552 else 797 else
553 stack->sptr = 0;
554
555 ctx->stack = stack;
556}
557
558static void
559deallocate_stack (Coro__State ctx)
560{
561 coro_stack *stack = ctx->stack;
562
563 ctx->stack = 0;
564
565 if (stack)
566 {
567 if (!--stack->refcnt)
568 { 798 {
569#ifdef HAVE_MMAP 799 #define SYM(sym) coro->slot->sym
570 if (stack->ssize > 0 && stack->sptr) 800 CORO_RSS;
571 munmap (stack->sptr, stack->ssize); 801 #undef SYM
572 else
573#else
574 Safefree (stack->sptr);
575#endif
576 Safefree (stack);
577 } 802 }
578 else if (ctx->gencnt == stack->gencnt) 803 }
579 --stack->usecnt; 804
805 return rss;
806}
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 */
827static int
828coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
829{
830 const char *s = MgPV_nolen_const (mg);
831
832 if (*s == '_')
580 } 833 {
581} 834 SV **svp = 0;
582 835
836 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
837 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
838
839 if (svp)
840 {
841 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
842 return 0;
843 }
844 }
845
846 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
847}
848
583static void 849static int
584setup_coro (void *arg) 850coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
851{
852 const char *s = MgPV_nolen_const (mg);
853
854 if (*s == '_')
855 {
856 SV **svp = 0;
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
873static int
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)
585{ 920{
586 /* 921 /*
587 * emulate part of the perl startup here. 922 * emulate part of the perl startup here.
588 */ 923 */
589 dSP;
590 Coro__State ctx = (Coro__State)arg;
591 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
592
593 coro_init_stacks (aTHX); 924 coro_init_stacks (aTHX);
594 /*PL_curcop = 0;*/
595 /*PL_in_eval = PL_in_eval;*/ /* inherit */
596 SvREFCNT_dec (GvAV (PL_defgv));
597 GvAV (PL_defgv) = ctx->args;
598 925
599 SPAGAIN; 926 PL_runops = RUNOPS_DEFAULT;
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;
600 942
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);
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);
954
955 {
956 dSP;
957 UNOP myop;
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 */
601 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);
602 { 1373 }
603 ctx->cursp = 0;
604 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
605 PUSHMARK(SP); 1701 PUSHMARK (SP);
606 PUTBACK; 1702 PUTBACK;
607 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1703 call_sv (sv_hook, G_VOID | G_DISCARD);
608 1704
609 if (SvTRUE (ERRSV)) 1705 FREETMPS;
610 croak (NULL); 1706 LEAVE;
611 else
612 croak ("FATAL: CCTXT coroutine returned!");
613 }
614 else
615 { 1707 }
616 UNOP myop;
617 1708
618 PL_op = (OP *)&myop; 1709 if (xs_hook)
1710 xs_hook ();
619 1711
620 Zero(&myop, 1, UNOP); 1712 return 1;
621 myop.op_next = Nullop; 1713}
622 myop.op_flags = OPf_WANT_VOID;
623 1714
624 PUSHMARK(SP); 1715static int
625 XPUSHs (sub_init); 1716api_is_ready (pTHX_ SV *coro_sv)
626 /* 1717{
627 * the next line is slightly wrong, as PL_op->op_next 1718 return !!(SvSTATE (coro_sv)->flags & CF_READY);
628 * is actually being executed so we skip the first op. 1719}
629 * that doesn't matter, though, since it is only
630 * pp_nextstate and we never return...
631 * ah yes, and I don't care anyways ;)
632 */
633 PUTBACK;
634 PL_op = pp_entersub();
635 SPAGAIN;
636 1720
637 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 (;;)
638 } 1742 {
639} 1743 struct coro *next = coro_deq (aTHX);
640 1744
641static void 1745 if (expect_true (next))
642continue_coro (void *arg)
643{
644 /*
645 * this is a _very_ stripped down perl interpreter ;)
646 */
647 Coro__State ctx = (Coro__State)arg;
648
649 /*FIXME*//* must set up top_env here */
650 ctx->cursp = 0;
651 PL_op = PL_op->op_next;
652 CALLRUNOPS(aTHX);
653
654 abort ();
655}
656
657STATIC void
658transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
659{
660 dSTACKLEVEL;
661 static struct coro *xnext;
662
663 if (prev != next)
664 {
665 xnext = next;
666
667 if (next->mainstack)
668 { 1746 {
669 SAVE (prev, flags); 1747 /* cannot transfer to destroyed coros, skip and look for next */
670 LOAD (next); 1748 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
671 1749 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
672 /* mark this state as in-use */ 1750 else
673 next->mainstack = 0;
674 next->tmps_ix = -2;
675
676 /* stacklevel changed? if yes, grab the stack for us! */
677 if (flags & TRANSFER_SAVE_CCTXT)
678 { 1751 {
679 if (!prev->stack) 1752 next->flags &= ~CF_READY;
680 allocate_stack (prev, 0); 1753 --coro_nready;
681 else if (prev->cursp != stacklevel 1754
682 && prev->stack->usecnt > 1) 1755 prepare_schedule_to (aTHX_ ta, next);
683 { 1756 break;
684 prev->gencnt = ++prev->stack->gencnt;
685 prev->stack->usecnt = 1;
686 }
687
688 /* has our stack been invalidated? */
689 if (next->stack && next->stack->gencnt != next->gencnt)
690 {
691 deallocate_stack (next);
692 allocate_stack (next, 1);
693 coro_create (&(next->stack->cctx),
694 continue_coro, (void *)next,
695 next->stack->sptr, labs (next->stack->ssize));
696 }
697
698 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
699 /* don't add any code here */
700 } 1757 }
701
702 } 1758 }
703 else if (next->tmps_ix == -2)
704 croak ("tried to transfer to running coroutine");
705 else 1759 else
706 { 1760 {
707 SAVE (prev, -1); /* first get rid of the old state */ 1761 /* nothing to schedule: call the idle handler */
708 1762 if (SvROK (sv_idle)
709 if (flags & TRANSFER_SAVE_CCTXT) 1763 && SvOBJECT (SvRV (sv_idle)))
710 { 1764 {
711 if (!prev->stack) 1765 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
712 allocate_stack (prev, 0); 1766 api_ready (aTHX_ SvRV (sv_idle));
713 1767 --coro_nready;
714 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
715 {
716 setup_coro (next);
717
718 prev->stack->refcnt++;
719 prev->stack->usecnt++;
720 next->stack = prev->stack;
721 next->gencnt = prev->gencnt;
722 }
723 else
724 {
725 allocate_stack (next, 1);
726 coro_create (&(next->stack->cctx),
727 setup_coro, (void *)next,
728 next->stack->sptr, labs (next->stack->ssize));
729 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
730 /* don't add any code here */
731 }
732 } 1768 }
733 else 1769 else
734 setup_coro (next); 1770 {
1771 dSP;
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;
1782 }
735 } 1783 }
736 } 1784 }
737
738 /*
739 * xnext is now either prev or next, depending on wether
740 * we switched the c stack or not. that's why i use a global
741 * variable, that should become thread-specific at one point.
742 */
743 xnext->cursp = stacklevel;
744} 1785}
745 1786
746static struct coro * 1787INLINE void
747sv_to_coro (SV *arg, const char *funcname, const char *varname) 1788prepare_cede (pTHX_ struct coro_transfer_args *ta)
748{ 1789{
749 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 1790 api_ready (aTHX_ coro_current);
750 { 1791 prepare_schedule (aTHX_ ta);
751 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 1792}
752 1793
753 if (!he) 1794INLINE void
754 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); 1795prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1796{
1797 SV *prev = SvRV (coro_current);
755 1798
756 arg = HeVAL(he); 1799 if (coro_nready)
757 } 1800 {
1801 prepare_schedule (aTHX_ ta);
1802 api_ready (aTHX_ prev);
758 1803 }
759 /* must also be changed inside Coro::Cont::yield */ 1804 else
760 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash) 1805 prepare_nop (aTHX_ ta);
761 return (struct coro *) SvIV((SV*)SvRV(arg));
762
763 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
764 /*NORETURN*/
765} 1806}
766 1807
1808static void
1809api_schedule (pTHX)
1810{
1811 struct coro_transfer_args ta;
1812
1813 prepare_schedule (aTHX_ &ta);
1814 TRANSFER (ta, 1);
1815}
1816
1817static void
1818api_schedule_to (pTHX_ SV *coro_sv)
1819{
1820 struct coro_transfer_args ta;
1821 struct coro *next = SvSTATE (coro_sv);
1822
1823 SvREFCNT_inc_NN (coro_sv);
1824 prepare_schedule_to (aTHX_ &ta, next);
1825}
1826
767static void 1827static int
768api_transfer(pTHX_ SV *prev, SV *next, int flags) 1828api_cede (pTHX)
769{ 1829{
770 transfer(aTHX_ 1830 struct coro_transfer_args ta;
771 sv_to_coro (prev, "Coro::transfer", "prev"),
772 sv_to_coro (next, "Coro::transfer", "next"),
773 flags);
774}
775 1831
776/** Coro ********************************************************************/ 1832 prepare_cede (aTHX_ &ta);
777 1833
778#define PRIO_MAX 3 1834 if (expect_true (ta.prev != ta.next))
779#define PRIO_HIGH 1 1835 {
780#define PRIO_NORMAL 0 1836 TRANSFER (ta, 1);
781#define PRIO_LOW -1 1837 return 1;
782#define PRIO_IDLE -3
783#define PRIO_MIN -4
784
785/* for Coro.pm */
786static GV *coro_current, *coro_idle;
787static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
788static int coro_nready;
789
790static void
791coro_enq (SV *sv)
792{
793 if (SvROK (sv))
794 { 1838 }
795 SV *hv = SvRV (sv); 1839 else
796 if (SvTYPE (hv) == SVt_PVHV) 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)
797 { 1897 {
798 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 1898 dSP; /* don't disturb outer sp */
799 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1899 SV *cb = av_pop (on_destroy);
800 1900
801 prio = prio > PRIO_MAX ? PRIO_MAX 1901 PUSHMARK (SP);
802 : prio < PRIO_MIN ? PRIO_MIN 1902
1903 if (statusp)
1904 {
803 : prio; 1905 int i;
1906 AV *status = (AV *)SvRV (*statusp);
1907 EXTEND (SP, AvFILLp (status) + 1);
804 1908
805 av_push (coro_ready [prio - PRIO_MIN], sv); 1909 for (i = 0; i <= AvFILLp (status); ++i)
806 coro_nready++; 1910 PUSHs (AvARRAY (status)[i]);
1911 }
807 1912
808 return; 1913 PUTBACK;
1914 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
809 } 1915 }
810 } 1916 }
1917}
811 1918
812 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 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);
1950 struct coro *coro = (struct coro *)frame->data;
1951
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 }
2076
2077 return 0;
2078}
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 }
813} 2111}
814 2112
815static SV * 2113static SV *
816coro_deq (int min_prio) 2114coro_new_rouse_cb (pTHX)
817{ 2115{
818 int prio = PRIO_MAX - PRIO_MIN; 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);
819 2120
820 min_prio -= PRIO_MIN; 2121 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
821 if (min_prio < 0) 2122 SvREFCNT_dec (data); /* magicext increases the refcount */
822 min_prio = 0;
823 2123
824 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2124 SvREFCNT_dec (coro->rouse_cb);
825 if (av_len (coro_ready[prio]) >= 0) 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))
826 { 2258 {
827 coro_nready--; 2259 /* ampersand-form of call, use @_ instead of stack */
828 return av_shift (coro_ready[prio]); 2260 AV *av = GvAV (PL_defgv);
2261 arg = AvARRAY (av);
2262 items = AvFILLp (av) + 1;
829 } 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
2567static int
2568slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2569{
2570 AV *av = (AV *)frame->data;
2571 SV *count_sv = AvARRAY (av)[0];
2572
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 }
830 2840
831 return 0; 2841 return 0;
832} 2842}
833 2843
834static void 2844static void
835api_ready (SV *coro) 2845slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
836{ 2846{
837 coro_enq (SvREFCNT_inc (coro)); 2847 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
838} 2848 SV *coro_hv = SvRV (coro_current);
2849 struct coro *coro = SvSTATE_hv (coro_hv);
839 2850
840static void 2851 /* put our coroutine id on the state arg */
841api_schedule (int cede) 2852 av_push (state, SvREFCNT_inc_NN (coro_hv));
842{
843 SV *prev, *next;
844 2853
845 prev = GvSV (coro_current); 2854 /* first see whether we have a non-zero priority and set it as AIO prio */
2855 if (coro->prio)
2856 {
2857 dSP;
846 2858
847 if (cede) 2859 static SV *prio_cv;
848 coro_enq (SvREFCNT_inc (prev)); 2860 static SV *prio_sv;
849 2861
850 next = coro_deq (PRIO_MIN); 2862 if (expect_false (!prio_cv))
2863 {
2864 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2865 prio_sv = newSViv (0);
2866 }
851 2867
852 if (!next) 2868 PUSHMARK (SP);
853 next = SvREFCNT_inc (GvSV (coro_idle)); 2869 sv_setiv (prio_sv, coro->prio);
2870 XPUSHs (prio_sv);
854 2871
855 GvSV (coro_current) = SvREFCNT_inc (next); 2872 PUTBACK;
856 transfer (aTHX_ 2873 call_sv (prio_cv, G_VOID | G_DISCARD);
857 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 2874 }
858 sv_to_coro (next, "Coro::schedule", "next coroutine"),
859 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
860 SvREFCNT_dec (next);
861 SvREFCNT_dec (prev);
862}
863 2875
2876 /* now call the original request */
2877 {
2878 dSP;
2879 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
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);
2896 }
2897
2898 /* now that the requets is going, we loop toll we have a result */
2899 frame->data = (void *)state;
2900 frame->prepare = prepare_schedule;
2901 frame->check = slf_check_aio_req;
2902}
2903
2904static void
2905coro_aio_req_xs (pTHX_ CV *cv)
2906{
2907 dXSARGS;
2908
2909 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2910
2911 XSRETURN_EMPTY;
2912}
2913
2914/*****************************************************************************/
2915
2916#if CORO_CLONE
2917# include "clone.c"
2918#endif
2919
864MODULE = Coro::State PACKAGE = Coro::State 2920MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
865 2921
866PROTOTYPES: ENABLE 2922PROTOTYPES: DISABLE
867 2923
868BOOT: 2924BOOT:
869{ /* {} necessary for stoopid perl-5.6.x */ 2925{
870 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2926#ifdef USE_ITHREADS
871 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2927# if CORO_PTHREAD
2928 coro_thx = PERL_GET_CONTEXT;
2929# endif
2930#endif
2931 BOOT_PAGESIZE;
2932
2933 cctx_current = cctx_new_empty ();
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
872 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 2946 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
873 2947
874 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 2948 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
875 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 2949 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
876 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 2950 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
877 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 2951 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
878
879 if (!padlist_cache)
880 padlist_cache = newHV ();
881 2952
882 main_mainstack = PL_mainstack; 2953 main_mainstack = PL_mainstack;
2954 main_top_env = PL_top_env;
883 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
884 coroapi.ver = CORO_API_VERSION; 2969 coroapi.ver = CORO_API_VERSION;
2970 coroapi.rev = CORO_API_REVISION;
2971
885 coroapi.transfer = api_transfer; 2972 coroapi.transfer = api_transfer;
886}
887 2973
888Coro::State 2974 coroapi.sv_state = SvSTATE_;
889_newprocess(args) 2975 coroapi.execute_slf = api_execute_slf;
890 SV * args 2976 coroapi.prepare_nop = prepare_nop;
891 PROTOTYPE: $ 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
2990 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
2991}
2992
2993SV *
2994new (char *klass, ...)
2995 ALIAS:
2996 Coro::new = 1
892 CODE: 2997 CODE:
893 Coro__State coro; 2998{
2999 struct coro *coro;
3000 MAGIC *mg;
3001 HV *hv;
3002 CV *cb;
3003 int i;
894 3004
895 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3005 if (items > 1)
896 croak ("Coro::State::_newprocess expects an arrayref");
897 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
898 New (0, coro, 1, struct coro); 3019 Newz (0, coro, 1, struct coro);
3020 coro->args = newAV ();
3021 coro->flags = CF_NEW;
899 3022
900 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 3023 if (coro_first) coro_first->prev = coro;
901 coro->mainstack = 0; /* actual work is done inside transfer */ 3024 coro->next = coro_first;
902 coro->stack = 0; 3025 coro_first = coro;
903 3026
904 RETVAL = coro; 3027 coro->hv = hv = newHV ();
3028 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3029 mg->mg_flags |= MGf_DUP;
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 }
3047}
905 OUTPUT: 3048 OUTPUT:
906 RETVAL 3049 RETVAL
907 3050
908void 3051void
909transfer(prev, next, flags) 3052transfer (...)
910 Coro::State_or_hashref prev
911 Coro::State_or_hashref next
912 int flags
913 PROTOTYPE: @ 3053 PROTOTYPE: $$
914 CODE: 3054 CODE:
915 PUTBACK; 3055 CORO_EXECUTE_SLF_XS (slf_init_transfer);
916 transfer (aTHX_ prev, next, flags); 3056
917 SPAGAIN; 3057bool
3058_destroy (SV *coro_sv)
3059 CODE:
3060 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3061 OUTPUT:
3062 RETVAL
918 3063
919void 3064void
920DESTROY(coro)
921 Coro::State coro
922 CODE:
923
924 if (coro->mainstack && coro->mainstack != main_mainstack)
925 {
926 struct coro temp;
927
928 PUTBACK;
929 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
930 LOAD(aTHX_ coro);
931 SPAGAIN;
932
933 destroy_stacks (aTHX);
934
935 LOAD((&temp)); /* this will get rid of defsv etc.. */
936 SPAGAIN;
937
938 coro->mainstack = 0;
939 }
940
941 deallocate_stack (coro);
942
943 Safefree (coro);
944
945void
946flush()
947 CODE:
948#ifdef MAY_FLUSH
949 flush_padlist_cache ();
950#endif
951
952void
953_exit(code) 3065_exit (int code)
954 int code
955 PROTOTYPE: $ 3066 PROTOTYPE: $
956 CODE: 3067 CODE:
957#if defined(__GLIBC__) || _POSIX_C_SOURCE
958 _exit (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));
959#else 3082#else
960 signal (SIGTERM, SIG_DFL); 3083 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
961 raise (SIGTERM);
962 exit (code);
963#endif 3084#endif
3085}
3086 OUTPUT:
3087 RETVAL
964 3088
965MODULE = Coro::State PACKAGE = Coro::Cont 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
966 3101
967# this is slightly dirty (should expose a c-level api) 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
968 3127
969void 3128void
970yield(...) 3129list ()
971 PROTOTYPE: @ 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: $;$
972 CODE: 3197 CODE:
973 static SV *returnstk; 3198{
974 SV *sv; 3199 struct coro *current = SvSTATE_current;
975 AV *defav = GvAV (PL_defgv); 3200 SV **throwp = self == current ? &CORO_THROW : &self->except;
976 struct coro *prev, *next;
977
978 if (!returnstk)
979 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
980
981 /* set up @_ -- ugly */
982 av_clear (defav);
983 av_fill (defav, items - 1);
984 while (items--)
985 av_store (defav, items, SvREFCNT_inc (ST(items)));
986
987 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
988 sv = av_pop ((AV *)SvRV (returnstk));
989 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
990 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
991 SvREFCNT_dec (sv); 3201 SvREFCNT_dec (*throwp);
3202 SvGETMAGIC (throw);
3203 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3204}
992 3205
993 transfer(aTHX_ prev, next, 0); 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
994 3270
995MODULE = Coro::State PACKAGE = Coro 3271MODULE = Coro::State PACKAGE = Coro
996 3272
997# this is slightly dirty (should expose a c-level api)
998
999BOOT: 3273BOOT:
1000{ 3274{
1001 int i; 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
1002 HV *stash = gv_stashpv ("Coro", TRUE); 3290 coro_stash = gv_stashpv ("Coro", TRUE);
1003 3291
1004 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 3292 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
1005 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 3293 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
1006 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 3294 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
1007 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 3295 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
1008 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 3296 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
1009 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 3297 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
1010
1011 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1012 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1013
1014 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1015 coro_ready[i] = newAV ();
1016 3298
1017 { 3299 {
1018 SV *sv = perl_get_sv("Coro::API", 1); 3300 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1019 3301
1020 coroapi.schedule = api_schedule; 3302 coroapi.schedule = api_schedule;
3303 coroapi.schedule_to = api_schedule_to;
3304 coroapi.cede = api_cede;
3305 coroapi.cede_notself = api_cede_notself;
1021 coroapi.ready = api_ready; 3306 coroapi.ready = api_ready;
3307 coroapi.is_ready = api_is_ready;
1022 coroapi.nready = &coro_nready; 3308 coroapi.nready = coro_nready;
1023 coroapi.current = coro_current; 3309 coroapi.current = coro_current;
1024 3310
1025 GCoroAPI = &coroapi; 3311 /*GCoroAPI = &coroapi;*/
1026 sv_setiv(sv, (IV)&coroapi); 3312 sv_setiv (sv, (IV)&coroapi);
1027 SvREADONLY_on(sv); 3313 SvREADONLY_on (sv);
1028 } 3314 }
1029} 3315}
1030 3316
1031void 3317void
1032ready(self) 3318terminate (...)
1033 SV * self
1034 CODE: 3319 CODE:
1035 api_ready (self); 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;
1036 3361
1037int 3362int
3363prio (Coro::State coro, int newprio = 0)
3364 PROTOTYPE: $;$
3365 ALIAS:
3366 nice = 1
3367 CODE:
3368{
3369 RETVAL = coro->prio;
3370
3371 if (items > 1)
3372 {
3373 if (ix)
3374 newprio = coro->prio - newprio;
3375
3376 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3377 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3378
3379 coro->prio = newprio;
3380 }
3381}
3382 OUTPUT:
3383 RETVAL
3384
3385SV *
3386ready (SV *self)
3387 PROTOTYPE: $
3388 CODE:
3389 RETVAL = boolSV (api_ready (aTHX_ self));
3390 OUTPUT:
3391 RETVAL
3392
3393int
1038nready(...) 3394nready (...)
1039 PROTOTYPE: 3395 PROTOTYPE:
1040 CODE: 3396 CODE:
1041 RETVAL = coro_nready; 3397 RETVAL = coro_nready;
1042 OUTPUT: 3398 OUTPUT:
1043 RETVAL 3399 RETVAL
1044 3400
1045void 3401void
1046schedule(...) 3402suspend (Coro::State self)
1047 PROTOTYPE: 3403 PROTOTYPE: $
1048 ALIAS:
1049 cede = 1
1050 CODE: 3404 CODE:
1051 api_schedule (ix); 3405 self->flags |= CF_SUSPENDED;
1052 3406
3407void
3408resume (Coro::State self)
3409 PROTOTYPE: $
3410 CODE:
3411 self->flags &= ~CF_SUSPENDED;
3412
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
3462SV *
3463rouse_cb ()
3464 PROTOTYPE:
3465 CODE:
3466 RETVAL = coro_new_rouse_cb (aTHX);
3467 OUTPUT:
3468 RETVAL
3469
3470void
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
3480 PROTOTYPE: &
3481 CODE:
3482{
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 {
3593 int i;
3594 EXTEND (SP, wcount);
3595 for (i = 1; i <= wcount; ++i)
3596 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3597 }
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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