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Comparing Coro/Coro/State.xs (file contents):
Revision 1.25 by root, Wed Aug 15 03:24:07 2001 UTC vs.
Revision 1.377 by root, Sat Oct 3 17:55:04 2009 UTC

1#define NDEBUG 1
2
3#include "libcoro/coro.c"
4
5#define PERL_NO_GET_CONTEXT
6#define PERL_EXT
7
1#include "EXTERN.h" 8#include "EXTERN.h"
2#include "perl.h" 9#include "perl.h"
3#include "XSUB.h" 10#include "XSUB.h"
11#include "perliol.h"
4 12
5#include "libcoro/coro.c" 13#include "schmorp.h"
6 14
7#include <signal.h> 15#include <stdio.h>
16#include <errno.h>
17#include <assert.h>
18
19#ifndef SVs_PADSTALE
20# define SVs_PADSTALE 0
21#endif
22
23#ifdef WIN32
24# undef setjmp
25# undef longjmp
26# undef _exit
27# define setjmp _setjmp /* deep magic */
28#else
29# include <inttypes.h> /* most portable stdint.h */
30#endif
8 31
9#ifdef HAVE_MMAP 32#ifdef HAVE_MMAP
10# include <unistd.h> 33# include <unistd.h>
11# include <sys/mman.h> 34# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 35# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 36# ifdef MAP_ANON
37# define MAP_ANONYMOUS MAP_ANON
15# else 38# else
16# undef HAVE_MMAP 39# undef HAVE_MMAP
17# endif 40# endif
18# endif 41# endif
42# include <limits.h>
43# ifndef PAGESIZE
44# define PAGESIZE pagesize
45# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
46static long pagesize;
47# else
48# define BOOT_PAGESIZE (void)0
49# endif
50#else
51# define PAGESIZE 0
52# define BOOT_PAGESIZE (void)0
19#endif 53#endif
20 54
21#define MAY_FLUSH /* increases codesize */ 55#if CORO_USE_VALGRIND
56# include <valgrind/valgrind.h>
57#endif
22 58
23#define SUB_INIT "Coro::State::initialize" 59/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 60static int cctx_max_idle = 4;
25 61
26/* The next macro should delcare a variable stacklevel that contains and approximation 62#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
27 * to the current C stack pointer. Its property is that it changes with each call 63# undef CORO_STACKGUARD
28 * and should be unique. */ 64#endif
65
66#ifndef CORO_STACKGUARD
67# define CORO_STACKGUARD 0
68#endif
69
70/* prefer perl internal functions over our own? */
71#ifndef CORO_PREFER_PERL_FUNCTIONS
72# define CORO_PREFER_PERL_FUNCTIONS 0
73#endif
74
75/* The next macros try to return the current stack pointer, in an as
76 * portable way as possible. */
77#if __GNUC__ >= 4
78# define dSTACKLEVEL int stacklevel_dummy
79# define STACKLEVEL __builtin_frame_address (0)
80#else
81# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 82# define STACKLEVEL ((void *)&stacklevel)
83#endif
30 84
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 85#define IN_DESTRUCT PL_dirty
86
87#if __GNUC__ >= 3
88# define attribute(x) __attribute__(x)
89# define expect(expr,value) __builtin_expect ((expr), (value))
90# define INLINE static inline
91#else
92# define attribute(x)
93# define expect(expr,value) (expr)
94# define INLINE static
95#endif
96
97#define expect_false(expr) expect ((expr) != 0, 0)
98#define expect_true(expr) expect ((expr) != 0, 1)
99
100#define NOINLINE attribute ((noinline))
32 101
33#include "CoroAPI.h" 102#include "CoroAPI.h"
103#define GCoroAPI (&coroapi) /* very sneaky */
34 104
105#ifdef USE_ITHREADS
106# if CORO_PTHREAD
107static void *coro_thx;
108# endif
109#endif
110
111#ifdef __linux
112# include <time.h> /* for timespec */
113# include <syscall.h> /* for SYS_* */
114# ifdef SYS_clock_gettime
115# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
116# define CORO_CLOCK_MONOTONIC 1
117# define CORO_CLOCK_THREAD_CPUTIME_ID 3
118# endif
119#endif
120
121static double (*nvtime)(); /* so why doesn't it take void? */
122static void (*u2time)(pTHX_ UV ret[2]);
123
124/* we hijack an hopefully unused CV flag for our purposes */
125#define CVf_SLF 0x4000
126static OP *pp_slf (pTHX);
127
128static U32 cctx_gen;
129static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 130static struct CoroAPI coroapi;
131static AV *main_mainstack; /* used to differentiate between $main and others */
132static JMPENV *main_top_env;
133static HV *coro_state_stash, *coro_stash;
134static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 135
37/* this is actually not only the c stack but also c registers etc... */ 136static AV *av_destroy; /* destruction queue */
137static SV *sv_manager; /* the manager coro */
138static SV *sv_idle; /* $Coro::idle */
139
140static GV *irsgv; /* $/ */
141static GV *stdoutgv; /* *STDOUT */
142static SV *rv_diehook;
143static SV *rv_warnhook;
144static HV *hv_sig; /* %SIG */
145
146/* async_pool helper stuff */
147static SV *sv_pool_rss;
148static SV *sv_pool_size;
149static SV *sv_async_pool_idle; /* description string */
150static AV *av_async_pool; /* idle pool */
151static SV *sv_Coro; /* class string */
152static CV *cv_pool_handler;
153
154/* Coro::AnyEvent */
155static SV *sv_activity;
156
157/* enable processtime/realtime profiling */
158static char enable_times;
159typedef U32 coro_ts[2];
160static coro_ts time_real, time_cpu;
161static char times_valid;
162
163static struct coro_cctx *cctx_first;
164static int cctx_count, cctx_idle;
165
166enum {
167 CC_MAPPED = 0x01,
168 CC_NOREUSE = 0x02, /* throw this away after tracing */
169 CC_TRACE = 0x04,
170 CC_TRACE_SUB = 0x08, /* trace sub calls */
171 CC_TRACE_LINE = 0x10, /* trace each statement */
172 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
173};
174
175/* this is a structure representing a c-level coroutine */
38typedef struct { 176typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 177{
40 int usecnt; /* shared by how many coroutines */ 178 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 179
180 /* the stack */
181 void *sptr;
182 size_t ssize;
183
184 /* cpu state */
185 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
186 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
187 JMPENV *top_env;
43 coro_context cctx; 188 coro_context cctx;
44 189
45 void *sptr; 190 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 191#if CORO_USE_VALGRIND
47} coro_stack; 192 int valgrind_id;
193#endif
194 unsigned char flags;
195} coro_cctx;
48 196
197coro_cctx *cctx_current; /* the currently running cctx */
198
199/*****************************************************************************/
200
201enum {
202 CF_RUNNING = 0x0001, /* coroutine is running */
203 CF_READY = 0x0002, /* coroutine is ready */
204 CF_NEW = 0x0004, /* has never been switched to */
205 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
206 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
207};
208
209/* the structure where most of the perl state is stored, overlaid on the cxstack */
210typedef struct
211{
212 SV *defsv;
213 AV *defav;
214 SV *errsv;
215 SV *irsgv;
216 HV *hinthv;
217#define VAR(name,type) type name;
218# include "state.h"
219#undef VAR
220} perl_slots;
221
222#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
223
224/* this is a structure representing a perl-level coroutine */
49struct coro { 225struct coro {
50 /* the optional C context */ 226 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 227 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 228
55 /* optionally saved, might be zero */ 229 /* ready queue */
56 AV *defav; 230 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;
63 231
64 /* the stacks and related info (callchain etc..) */ 232 /* state data */
65 PERL_SI *curstackinfo; 233 struct CoroSLF slf_frame; /* saved slf frame */
66 AV *curstack;
67 AV *mainstack; 234 AV *mainstack;
68 SV **stack_sp; 235 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;
91 236
237 CV *startcv; /* the CV to execute */
92 /* data associated with this coroutine (initial args) */ 238 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 239 int refcnt; /* coroutines are refcounted, yes */
240 int flags; /* CF_ flags */
241 HV *hv; /* the perl hash associated with this coro, if any */
242 void (*on_destroy)(pTHX_ struct coro *coro);
243
244 /* statistics */
245 int usecount; /* number of transfers to this coro */
246
247 /* coro process data */
248 int prio;
249 SV *except; /* exception to be thrown */
250 SV *rouse_cb;
251
252 /* async_pool */
253 SV *saved_deffh;
254 SV *invoke_cb;
255 AV *invoke_av;
256
257 /* on_enter/on_leave */
258 AV *on_enter;
259 AV *on_leave;
260
261 /* swap_sv */
262 AV *swap_sv;
263
264 /* times */
265 coro_ts t_cpu, t_real;
266
267 /* linked list */
268 struct coro *next, *prev;
94}; 269};
95 270
96typedef struct coro *Coro__State; 271typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 272typedef struct coro *Coro__State_or_hashref;
98 273
99static AV *main_mainstack; /* used to differentiate between $main and others */ 274/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 275/* and get copied between struct coro and these variables */
276/* the mainr easonw e don't support windows process emulation */
277static struct CoroSLF slf_frame; /* the current slf frame */
278
279/** Coro ********************************************************************/
280
281#define CORO_PRIO_MAX 3
282#define CORO_PRIO_HIGH 1
283#define CORO_PRIO_NORMAL 0
284#define CORO_PRIO_LOW -1
285#define CORO_PRIO_IDLE -3
286#define CORO_PRIO_MIN -4
287
288/* for Coro.pm */
289static SV *coro_current;
290static SV *coro_readyhook;
291static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
292static CV *cv_coro_run, *cv_coro_terminate;
293static struct coro *coro_first;
294#define coro_nready coroapi.nready
295
296/** Coro::Select ************************************************************/
297
298static OP *(*coro_old_pp_sselect) (pTHX);
101static SV *ucoro_state_sv; 299static SV *coro_select_select;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104 300
105/* mostly copied from op.c:cv_clone2 */ 301/* horrible hack, but if it works... */
106STATIC AV * 302static OP *
107clone_padlist (AV *protopadlist) 303coro_pp_sselect (pTHX)
108{ 304{
109 AV *av; 305 dSP;
110 I32 ix; 306 PUSHMARK (SP - 4); /* fake argument list */
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 307 XPUSHs (coro_select_select);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 308 PUTBACK;
113 SV **pname = AvARRAY (protopad_name); 309
114 SV **ppad = AvARRAY (protopad); 310 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
115 I32 fname = AvFILLp (protopad_name); 311 PL_op->op_flags |= OPf_STACKED;
116 I32 fpad = AvFILLp (protopad); 312 PL_op->op_private = 0;
313 return PL_ppaddr [OP_ENTERSUB](aTHX);
314}
315
316/** lowlevel stuff **********************************************************/
317
318static SV *
319coro_get_sv (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_sv (name, create);
324#endif
325 return get_sv (name, create);
326}
327
328static AV *
329coro_get_av (pTHX_ const char *name, int create)
330{
331#if PERL_VERSION_ATLEAST (5,10,0)
332 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
333 get_av (name, create);
334#endif
335 return get_av (name, create);
336}
337
338static HV *
339coro_get_hv (pTHX_ const char *name, int create)
340{
341#if PERL_VERSION_ATLEAST (5,10,0)
342 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
343 get_hv (name, create);
344#endif
345 return get_hv (name, create);
346}
347
348INLINE void
349coro_times_update ()
350{
351#ifdef coro_clock_gettime
352 struct timespec ts;
353
354 ts.tv_sec = ts.tv_nsec = 0;
355 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
356 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
357
358 ts.tv_sec = ts.tv_nsec = 0;
359 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
360 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
361#else
362 dTHX;
363 UV tv[2];
364
365 u2time (aTHX_ tv);
366 time_real [0] = tv [0];
367 time_real [1] = tv [1] * 1000;
368#endif
369}
370
371INLINE void
372coro_times_add (struct coro *c)
373{
374 c->t_real [1] += time_real [1];
375 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
376 c->t_real [0] += time_real [0];
377
378 c->t_cpu [1] += time_cpu [1];
379 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
380 c->t_cpu [0] += time_cpu [0];
381}
382
383INLINE void
384coro_times_sub (struct coro *c)
385{
386 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
387 c->t_real [1] -= time_real [1];
388 c->t_real [0] -= time_real [0];
389
390 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
391 c->t_cpu [1] -= time_cpu [1];
392 c->t_cpu [0] -= time_cpu [0];
393}
394
395/*****************************************************************************/
396/* magic glue */
397
398#define CORO_MAGIC_type_cv 26
399#define CORO_MAGIC_type_state PERL_MAGIC_ext
400
401#define CORO_MAGIC_NN(sv, type) \
402 (expect_true (SvMAGIC (sv)->mg_type == type) \
403 ? SvMAGIC (sv) \
404 : mg_find (sv, type))
405
406#define CORO_MAGIC(sv, type) \
407 (expect_true (SvMAGIC (sv)) \
408 ? CORO_MAGIC_NN (sv, type) \
409 : 0)
410
411#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
412#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
413
414INLINE struct coro *
415SvSTATE_ (pTHX_ SV *coro)
416{
417 HV *stash;
418 MAGIC *mg;
419
420 if (SvROK (coro))
421 coro = SvRV (coro);
422
423 if (expect_false (SvTYPE (coro) != SVt_PVHV))
424 croak ("Coro::State object required");
425
426 stash = SvSTASH (coro);
427 if (expect_false (stash != coro_stash && stash != coro_state_stash))
428 {
429 /* very slow, but rare, check */
430 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
431 croak ("Coro::State object required");
432 }
433
434 mg = CORO_MAGIC_state (coro);
435 return (struct coro *)mg->mg_ptr;
436}
437
438#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
439
440/* faster than SvSTATE, but expects a coroutine hv */
441#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
442#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
443
444/*****************************************************************************/
445/* padlist management and caching */
446
447static AV *
448coro_derive_padlist (pTHX_ CV *cv)
449{
450 AV *padlist = CvPADLIST (cv);
117 AV *newpadlist, *newpad_name, *newpad; 451 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);
127 452
128 newpadlist = newAV (); 453 newpadlist = newAV ();
129 AvREAL_off (newpadlist); 454 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name); 455#if PERL_VERSION_ATLEAST (5,10,0)
456 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
457#else
458 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
459#endif
460 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
461 --AvFILLp (padlist);
462
463 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
131 av_store (newpadlist, 1, (SV *) newpad); 464 av_store (newpadlist, 1, (SV *)newpad);
132 465
133 av = newAV (); /* will be @_ */ 466 return newpadlist;
134 av_extend (av, 0); 467}
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137 468
138 for (ix = fpad; ix > 0; ix--) 469static void
470free_padlist (pTHX_ AV *padlist)
471{
472 /* may be during global destruction */
473 if (!IN_DESTRUCT)
139 { 474 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 475 I32 i = AvFILLp (padlist);
141 if (namesv && namesv != &PL_sv_undef) 476
477 while (i > 0) /* special-case index 0 */
142 { 478 {
143 char *name = SvPVX (namesv); /* XXX */ 479 /* we try to be extra-careful here */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 480 AV *av = (AV *)AvARRAY (padlist)[i--];
145 { /* lexical from outside? */ 481 I32 j = AvFILLp (av);
146 npad[ix] = SvREFCNT_inc (ppad[ix]); 482
147 } 483 while (j >= 0)
148 else 484 SvREFCNT_dec (AvARRAY (av)[j--]);
149 { /* our own lexical */ 485
150 SV *sv; 486 AvFILLp (av) = -1;
151 if (*name == '&') 487 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 } 488 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 489
165 { 490 SvREFCNT_dec (AvARRAY (padlist)[0]);
166 npad[ix] = SvREFCNT_inc (ppad[ix]); 491
167 } 492 AvFILLp (padlist) = -1;
493 SvREFCNT_dec ((SV*)padlist);
494 }
495}
496
497static int
498coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
499{
500 AV *padlist;
501 AV *av = (AV *)mg->mg_obj;
502
503 /* perl manages to free our internal AV and _then_ call us */
504 if (IN_DESTRUCT)
505 return 0;
506
507 /* casting is fun. */
508 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
509 free_padlist (aTHX_ padlist);
510
511 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
512
513 return 0;
514}
515
516static MGVTBL coro_cv_vtbl = {
517 0, 0, 0, 0,
518 coro_cv_free
519};
520
521/* the next two functions merely cache the padlists */
522static void
523get_padlist (pTHX_ CV *cv)
524{
525 MAGIC *mg = CORO_MAGIC_cv (cv);
526 AV *av;
527
528 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
529 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
168 else 530 else
169 { 531 {
170 SV *sv = NEWSV (0, 0); 532#if CORO_PREFER_PERL_FUNCTIONS
171 SvPADTMP_on (sv); 533 /* this is probably cleaner? but also slower! */
172 npad[ix] = sv; 534 /* in practise, it seems to be less stable */
173 } 535 CV *cp = Perl_cv_clone (aTHX_ cv);
174 } 536 CvPADLIST (cv) = CvPADLIST (cp);
175 537 CvPADLIST (cp) = 0;
176#if 0 /* return -ENOTUNDERSTOOD */ 538 SvREFCNT_dec (cp);
177 /* Now that vars are all in place, clone nested closures. */ 539#else
178 540 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
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 541#endif
195 542 }
196 return newpadlist;
197} 543}
198 544
199#ifdef MAY_FLUSH 545static void
200STATIC AV * 546put_padlist (pTHX_ CV *cv)
201free_padlist (AV *padlist)
202{ 547{
203 /* may be during global destruction */ 548 MAGIC *mg = CORO_MAGIC_cv (cv);
204 if (SvREFCNT(padlist)) 549 AV *av;
550
551 if (expect_false (!mg))
552 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
553
554 av = (AV *)mg->mg_obj;
555
556 if (expect_false (AvFILLp (av) >= AvMAX (av)))
557 av_extend (av, AvFILLp (av) + 1);
558
559 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
560}
561
562/** load & save, init *******************************************************/
563
564/* swap sv heads, at least logically */
565static void
566swap_svs (pTHX_ Coro__State c)
567{
568 int i;
569
570 for (i = 0; i <= AvFILLp (c->swap_sv); )
205 { 571 {
206 I32 i = AvFILLp(padlist); 572 SV *a = AvARRAY (c->swap_sv)[i++];
207 while (i >= 0) 573 SV *b = AvARRAY (c->swap_sv)[i++];
574
575 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
576 SV tmp;
577
578 /* swap sv_any */
579 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
580
581 /* swap sv_flags */
582 SvFLAGS (&tmp) = SvFLAGS (a);
583 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
584 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
585
586#if PERL_VERSION_ATLEAST (5,10,0)
587 /* perl 5.10 complicates this _quite_ a bit, but it also is
588 * is much faster, so no quarrels here. alternatively, we could
589 * sv_upgrade to avoid this.
590 */
208 { 591 {
209 SV **svp = av_fetch(padlist, i--, FALSE); 592 /* swap sv_u */
210 SV *sv = svp ? *svp : Nullsv; 593 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
211 if (sv) 594
212 SvREFCNT_dec(sv); 595 /* if SvANY points to the head, we need to adjust the pointers,
596 * as the pointer for a still points to b, and maybe vice versa.
597 */
598 #define svany_in_head(type) \
599 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
600
601 if (svany_in_head (SvTYPE (a)))
602 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
603
604 if (svany_in_head (SvTYPE (b)))
605 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
213 } 606 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif 607#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 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 { 608 }
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244} 609}
245 610
246#ifdef MAY_FLUSH 611#define SWAP_SVS(coro) \
247STATIC void 612 if (expect_false ((coro)->swap_sv)) \
248flush_padlist_cache () 613 swap_svs (aTHX_ (coro))
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252 614
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) SB load_state(aTHX_ (state)); SPAGAIN; SE
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void 615static void
616on_enterleave_call (pTHX_ SV *cb);
617
618static void
281load_state(pTHX_ Coro__State c) 619load_perl (pTHX_ Coro__State c)
282{ 620{
283 PL_dowarn = c->dowarn; 621 perl_slots *slot = c->slot;
284 PL_in_eval = c->in_eval; 622 c->slot = 0;
285 623
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack; 624 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;
312 625
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 626 GvSV (PL_defgv) = slot->defsv;
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 627 GvAV (PL_defgv) = slot->defav;
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 628 GvSV (PL_errgv) = slot->errsv;
629 GvSV (irsgv) = slot->irsgv;
630 GvHV (PL_hintgv) = slot->hinthv;
631
632 #define VAR(name,type) PL_ ## name = slot->name;
633 # include "state.h"
634 #undef VAR
316 635
317 { 636 {
318 dSP; 637 dSP;
638
319 CV *cv; 639 CV *cv;
320 640
321 /* now do the ugly restore mess */ 641 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs)) 642 while (expect_true (cv = (CV *)POPs))
323 { 643 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */ 644 put_padlist (aTHX_ cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist; 645 CvDEPTH (cv) = PTR2IV (POPs);
330#ifdef USE_THREADS 646 CvPADLIST (cv) = (AV *)POPs;
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 } 647 }
337 648
338 PUTBACK; 649 PUTBACK;
339 } 650 }
340}
341 651
652 slf_frame = c->slf_frame;
653 CORO_THROW = c->except;
654
655 if (expect_false (enable_times))
656 {
657 if (expect_false (!times_valid))
658 coro_times_update ();
659
660 coro_times_sub (c);
661 }
662
663 if (expect_false (c->on_enter))
664 {
665 int i;
666
667 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
668 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
669 }
670
671 SWAP_SVS (c);
672}
673
342static void 674static void
343save_state(pTHX_ Coro__State c, int flags) 675save_perl (pTHX_ Coro__State c)
344{ 676{
677 SWAP_SVS (c);
678
679 if (expect_false (c->on_leave))
680 {
681 int i;
682
683 for (i = AvFILLp (c->on_leave); i >= 0; --i)
684 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
685 }
686
687 times_valid = 0;
688
689 if (expect_false (enable_times))
690 {
691 coro_times_update (); times_valid = 1;
692 coro_times_add (c);
693 }
694
695 c->except = CORO_THROW;
696 c->slf_frame = slf_frame;
697
345 { 698 {
346 dSP; 699 dSP;
347 I32 cxix = cxstack_ix; 700 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack; 701 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo; 702 PERL_SI *top_si = PL_curstackinfo;
… …
351 /* 704 /*
352 * the worst thing you can imagine happens first - we have to save 705 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :( 706 * (and reinitialize) all cv's in the whole callchain :(
354 */ 707 */
355 708
356 PUSHs (Nullsv); 709 XPUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 710 /* this loop was inspired by pp_caller */
358 for (;;) 711 for (;;)
359 { 712 {
360 do 713 while (expect_true (cxix >= 0))
361 { 714 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 715 PERL_CONTEXT *cx = &ccstk[cxix--];
363 716
364 if (CxTYPE(cx) == CXt_SUB) 717 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
365 { 718 {
366 CV *cv = cx->blk_sub.cv; 719 CV *cv = cx->blk_sub.cv;
720
367 if (CvDEPTH(cv)) 721 if (expect_true (CvDEPTH (cv)))
368 { 722 {
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); 723 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)); 724 PUSHs ((SV *)CvPADLIST (cv));
725 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
384 PUSHs ((SV *)cv); 726 PUSHs ((SV *)cv);
385 727
386 get_padlist (cv); /* this is a monster */ 728 CvDEPTH (cv) = 0;
729 get_padlist (aTHX_ cv);
387 } 730 }
388 } 731 }
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 } 732 }
396 while (cxix >= 0);
397 733
398 if (top_si->si_type == PERLSI_MAIN) 734 if (expect_true (top_si->si_type == PERLSI_MAIN))
399 break; 735 break;
400 736
401 top_si = top_si->si_prev; 737 top_si = top_si->si_prev;
402 ccstk = top_si->si_cxstack; 738 ccstk = top_si->si_cxstack;
403 cxix = top_si->si_cxix; 739 cxix = top_si->si_cxix;
404 } 740 }
405 741
406 PUTBACK; 742 PUTBACK;
407 } 743 }
408 744
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 745 /* allocate some space on the context stack for our purposes */
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 746 /* we manually unroll here, as usually 2 slots is enough */
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 747 if (SLOT_COUNT >= 1) CXINC;
748 if (SLOT_COUNT >= 2) CXINC;
749 if (SLOT_COUNT >= 3) CXINC;
750 {
751 unsigned int i;
752 for (i = 3; i < SLOT_COUNT; ++i)
753 CXINC;
754 }
755 cxstack_ix -= SLOT_COUNT; /* undo allocation */
412 756
413 /* I have not the slightest idea of why av_reify is necessary */
414 /* but if it's missing the defav contents magically get replaced sometimes */
415 if (c->defav)
416 av_reify (c->defav);
417
418 c->dowarn = PL_dowarn;
419 c->in_eval = PL_in_eval;
420
421 c->curstackinfo = PL_curstackinfo;
422 c->curstack = PL_curstack;
423 c->mainstack = PL_mainstack; 757 c->mainstack = PL_mainstack;
424 c->stack_sp = PL_stack_sp; 758
425 c->op = PL_op; 759 {
426 c->curpad = PL_curpad; 760 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
427 c->stack_base = PL_stack_base; 761
428 c->stack_max = PL_stack_max; 762 slot->defav = GvAV (PL_defgv);
429 c->tmps_stack = PL_tmps_stack; 763 slot->defsv = DEFSV;
430 c->tmps_floor = PL_tmps_floor; 764 slot->errsv = ERRSV;
431 c->tmps_ix = PL_tmps_ix; 765 slot->irsgv = GvSV (irsgv);
432 c->tmps_max = PL_tmps_max; 766 slot->hinthv = GvHV (PL_hintgv);
433 c->markstack = PL_markstack; 767
434 c->markstack_ptr = PL_markstack_ptr; 768 #define VAR(name,type) slot->name = PL_ ## name;
435 c->markstack_max = PL_markstack_max; 769 # include "state.h"
436 c->scopestack = PL_scopestack; 770 #undef VAR
437 c->scopestack_ix = PL_scopestack_ix; 771 }
438 c->scopestack_max = PL_scopestack_max;
439 c->savestack = PL_savestack;
440 c->savestack_ix = PL_savestack_ix;
441 c->savestack_max = PL_savestack_max;
442 c->retstack = PL_retstack;
443 c->retstack_ix = PL_retstack_ix;
444 c->retstack_max = PL_retstack_max;
445 c->curcop = PL_curcop;
446 c->top_env = PL_top_env;
447} 772}
448 773
449/* 774/*
450 * allocate various perl stacks. This is an exact copy 775 * allocate various perl stacks. This is almost an exact copy
451 * of perl.c:init_stacks, except that it uses less memory 776 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need 777 * on the (sometimes correct) assumption that coroutines do
453 * a lot of stackspace. 778 * not usually need a lot of stackspace.
454 */ 779 */
455STATIC void 780#if CORO_PREFER_PERL_FUNCTIONS
781# define coro_init_stacks(thx) init_stacks ()
782#else
783static void
456coro_init_stacks (pTHX) 784coro_init_stacks (pTHX)
457{ 785{
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 786 PL_curstackinfo = new_stackinfo(32, 8);
459 PL_curstackinfo->si_type = PERLSI_MAIN; 787 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack; 788 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 789 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462 790
463 PL_stack_base = AvARRAY(PL_curstack); 791 PL_stack_base = AvARRAY(PL_curstack);
464 PL_stack_sp = PL_stack_base; 792 PL_stack_sp = PL_stack_base;
465 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 793 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466 794
467 New(50,PL_tmps_stack,96,SV*); 795 New(50,PL_tmps_stack,32,SV*);
468 PL_tmps_floor = -1; 796 PL_tmps_floor = -1;
469 PL_tmps_ix = -1; 797 PL_tmps_ix = -1;
470 PL_tmps_max = 96; 798 PL_tmps_max = 32;
471 799
472 New(54,PL_markstack,16,I32); 800 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack; 801 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16; 802 PL_markstack_max = PL_markstack + 16;
475 803
804#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 805 SET_MARK_OFFSET;
806#endif
477 807
478 New(54,PL_scopestack,16,I32); 808 New(54,PL_scopestack,8,I32);
479 PL_scopestack_ix = 0; 809 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16; 810 PL_scopestack_max = 8;
481 811
482 New(54,PL_savestack,96,ANY); 812 New(54,PL_savestack,24,ANY);
483 PL_savestack_ix = 0; 813 PL_savestack_ix = 0;
484 PL_savestack_max = 96; 814 PL_savestack_max = 24;
485 815
816#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 817 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 818 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 819 PL_retstack_max = 4;
820#endif
489} 821}
822#endif
490 823
491/* 824/*
492 * destroy the stacks, the callchain etc... 825 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */ 826 */
495STATIC void 827static void
496destroy_stacks(pTHX) 828coro_destruct_stacks (pTHX)
497{ 829{
498 /* is this ugly, I ask? */
499 while (PL_scopestack_ix)
500 LEAVE;
501
502 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS;
505
506 while (PL_curstackinfo->si_next) 830 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 831 PL_curstackinfo = PL_curstackinfo->si_next;
508 832
509 while (PL_curstackinfo) 833 while (PL_curstackinfo)
510 { 834 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 835 PERL_SI *p = PL_curstackinfo->si_prev;
512 836
513 { 837 if (!IN_DESTRUCT)
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
520 dounwind(-1);
521
522 SvREFCNT_dec(PL_curstackinfo->si_stack); 838 SvREFCNT_dec (PL_curstackinfo->si_stack);
839
523 Safefree(PL_curstackinfo->si_cxstack); 840 Safefree (PL_curstackinfo->si_cxstack);
524 Safefree(PL_curstackinfo); 841 Safefree (PL_curstackinfo);
525 PL_curstackinfo = p; 842 PL_curstackinfo = p;
526 } 843 }
527 844
528 Safefree(PL_tmps_stack); 845 Safefree (PL_tmps_stack);
529 Safefree(PL_markstack); 846 Safefree (PL_markstack);
530 Safefree(PL_scopestack); 847 Safefree (PL_scopestack);
531 Safefree(PL_savestack); 848 Safefree (PL_savestack);
849#if !PERL_VERSION_ATLEAST (5,10,0)
532 Safefree(PL_retstack); 850 Safefree (PL_retstack);
533}
534
535static void
536allocate_stack (Coro__State ctx, int alloc)
537{
538 coro_stack *stack;
539
540 New (0, stack, 1, coro_stack);
541
542 stack->refcnt = 1;
543 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0;
545 if (alloc)
546 {
547#ifdef HAVE_MMAP
548 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
550 if (stack->sptr == (void *)-1)
551#endif 851#endif
852}
853
854#define CORO_RSS \
855 rss += sizeof (SYM (curstackinfo)); \
856 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
857 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
858 rss += SYM (tmps_max) * sizeof (SV *); \
859 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
860 rss += SYM (scopestack_max) * sizeof (I32); \
861 rss += SYM (savestack_max) * sizeof (ANY);
862
863static size_t
864coro_rss (pTHX_ struct coro *coro)
865{
866 size_t rss = sizeof (*coro);
867
868 if (coro->mainstack)
869 {
870 if (coro->flags & CF_RUNNING)
552 { 871 {
553 /*FIXME*//*D*//* reasonable stack size! */ 872 #define SYM(sym) PL_ ## sym
554 stack->ssize = -4096 * sizeof (long); 873 CORO_RSS;
555 New (0, stack->sptr, 4096, long); 874 #undef SYM
556 } 875 }
557 }
558 else 876 else
559 stack->sptr = 0;
560
561 ctx->stack = stack;
562}
563
564static void
565deallocate_stack (Coro__State ctx)
566{
567 coro_stack *stack = ctx->stack;
568
569 ctx->stack = 0;
570
571 if (stack)
572 {
573 if (!--stack->refcnt)
574 { 877 {
575#ifdef HAVE_MMAP 878 #define SYM(sym) coro->slot->sym
576 if (stack->ssize > 0 && stack->sptr) 879 CORO_RSS;
577 munmap (stack->sptr, stack->ssize); 880 #undef SYM
578 else 881 }
579#else 882 }
580 Safefree (stack->sptr); 883
884 return rss;
885}
886
887/** coroutine stack handling ************************************************/
888
889static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
890static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
891static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
892
893/* apparently < 5.8.8 */
894#ifndef MgPV_nolen_const
895#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
896 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
897 (const char*)(mg)->mg_ptr)
581#endif 898#endif
582 Safefree (stack); 899
900/*
901 * This overrides the default magic get method of %SIG elements.
902 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
903 * and instead of trying to save and restore the hash elements, we just provide
904 * readback here.
905 */
906static int
907coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
908{
909 const char *s = MgPV_nolen_const (mg);
910
911 if (*s == '_')
912 {
913 SV **svp = 0;
914
915 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
916 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
917
918 if (svp)
919 {
920 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
921 return 0;
583 } 922 }
584 else if (ctx->gencnt == stack->gencnt) 923 }
585 --stack->usecnt; 924
925 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
926}
927
928static int
929coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
930{
931 const char *s = MgPV_nolen_const (mg);
932
933 if (*s == '_')
586 } 934 {
587} 935 SV **svp = 0;
588 936
937 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
938 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
939
940 if (svp)
941 {
942 SV *old = *svp;
943 *svp = 0;
944 SvREFCNT_dec (old);
945 return 0;
946 }
947 }
948
949 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
950}
951
589static void 952static int
590setup_coro (void *arg) 953coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
954{
955 const char *s = MgPV_nolen_const (mg);
956
957 if (*s == '_')
958 {
959 SV **svp = 0;
960
961 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
962 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
963
964 if (svp)
965 {
966 SV *old = *svp;
967 *svp = SvOK (sv) ? newSVsv (sv) : 0;
968 SvREFCNT_dec (old);
969 return 0;
970 }
971 }
972
973 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
974}
975
976static void
977prepare_nop (pTHX_ struct coro_transfer_args *ta)
978{
979 /* kind of mega-hacky, but works */
980 ta->next = ta->prev = (struct coro *)ta;
981}
982
983static int
984slf_check_nop (pTHX_ struct CoroSLF *frame)
985{
986 return 0;
987}
988
989static int
990slf_check_repeat (pTHX_ struct CoroSLF *frame)
991{
992 return 1;
993}
994
995static UNOP init_perl_op;
996
997static void NOINLINE /* noinline to keep it out of the transfer fast path */
998init_perl (pTHX_ struct coro *coro)
591{ 999{
592 /* 1000 /*
593 * emulate part of the perl startup here. 1001 * emulate part of the perl startup here.
594 */ 1002 */
1003 coro_init_stacks (aTHX);
1004
1005 PL_runops = RUNOPS_DEFAULT;
1006 PL_curcop = &PL_compiling;
1007 PL_in_eval = EVAL_NULL;
1008 PL_comppad = 0;
1009 PL_comppad_name = 0;
1010 PL_comppad_name_fill = 0;
1011 PL_comppad_name_floor = 0;
1012 PL_curpm = 0;
1013 PL_curpad = 0;
1014 PL_localizing = 0;
1015 PL_dirty = 0;
1016 PL_restartop = 0;
1017#if PERL_VERSION_ATLEAST (5,10,0)
1018 PL_parser = 0;
1019#endif
1020 PL_hints = 0;
1021
1022 /* recreate the die/warn hooks */
1023 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1024 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1025
1026 GvSV (PL_defgv) = newSV (0);
1027 GvAV (PL_defgv) = coro->args; coro->args = 0;
1028 GvSV (PL_errgv) = newSV (0);
1029 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1030 GvHV (PL_hintgv) = 0;
1031 PL_rs = newSVsv (GvSV (irsgv));
1032 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1033
1034 {
1035 dSP;
1036 UNOP myop;
1037
1038 Zero (&myop, 1, UNOP);
1039 myop.op_next = Nullop;
1040 myop.op_type = OP_ENTERSUB;
1041 myop.op_flags = OPf_WANT_VOID;
1042
1043 PUSHMARK (SP);
1044 PUSHs ((SV *)coro->startcv);
1045 PUTBACK;
1046 PL_op = (OP *)&myop;
1047 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1048 }
1049
1050 /* this newly created coroutine might be run on an existing cctx which most
1051 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1052 */
1053 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1054 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1055
1056 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1057 init_perl_op.op_next = PL_op;
1058 init_perl_op.op_type = OP_ENTERSUB;
1059 init_perl_op.op_ppaddr = pp_slf;
1060 /* no flags etc. required, as an init function won't be called */
1061
1062 PL_op = (OP *)&init_perl_op;
1063
1064 /* copy throw, in case it was set before init_perl */
1065 CORO_THROW = coro->except;
1066
1067 SWAP_SVS (coro);
1068
1069 if (expect_false (enable_times))
1070 {
1071 coro_times_update ();
1072 coro_times_sub (coro);
1073 }
1074}
1075
1076static void
1077coro_unwind_stacks (pTHX)
1078{
1079 if (!IN_DESTRUCT)
1080 {
1081 /* restore all saved variables and stuff */
1082 LEAVE_SCOPE (0);
1083 assert (PL_tmps_floor == -1);
1084
1085 /* free all temporaries */
1086 FREETMPS;
1087 assert (PL_tmps_ix == -1);
1088
1089 /* unwind all extra stacks */
1090 POPSTACK_TO (PL_mainstack);
1091
1092 /* unwind main stack */
1093 dounwind (-1);
1094 }
1095}
1096
1097static void
1098destroy_perl (pTHX_ struct coro *coro)
1099{
1100 SV *svf [9];
1101
1102 {
1103 struct coro *current = SvSTATE_current;
1104
1105 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1106
1107 save_perl (aTHX_ current);
1108 load_perl (aTHX_ coro);
1109
1110 coro_unwind_stacks (aTHX);
1111 coro_destruct_stacks (aTHX);
1112
1113 /* restore swapped sv's */
1114 SWAP_SVS (coro);
1115
1116 // now save some sv's to be free'd later
1117 svf [0] = GvSV (PL_defgv);
1118 svf [1] = (SV *)GvAV (PL_defgv);
1119 svf [2] = GvSV (PL_errgv);
1120 svf [3] = (SV *)PL_defoutgv;
1121 svf [4] = PL_rs;
1122 svf [5] = GvSV (irsgv);
1123 svf [6] = (SV *)GvHV (PL_hintgv);
1124 svf [7] = PL_diehook;
1125 svf [8] = PL_warnhook;
1126 assert (9 == sizeof (svf) / sizeof (*svf));
1127
1128 load_perl (aTHX_ current);
1129 }
1130
1131 {
1132 unsigned int i;
1133
1134 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1135 SvREFCNT_dec (svf [i]);
1136
1137 SvREFCNT_dec (coro->saved_deffh);
1138 SvREFCNT_dec (coro->rouse_cb);
1139 SvREFCNT_dec (coro->invoke_cb);
1140 SvREFCNT_dec (coro->invoke_av);
1141 }
1142}
1143
1144INLINE void
1145free_coro_mortal (pTHX)
1146{
1147 if (expect_true (coro_mortal))
1148 {
1149 SvREFCNT_dec (coro_mortal);
1150 coro_mortal = 0;
1151 }
1152}
1153
1154static int
1155runops_trace (pTHX)
1156{
1157 COP *oldcop = 0;
1158 int oldcxix = -2;
1159
1160 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1161 {
1162 PERL_ASYNC_CHECK ();
1163
1164 if (cctx_current->flags & CC_TRACE_ALL)
1165 {
1166 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1167 {
1168 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1169 SV **bot, **top;
1170 AV *av = newAV (); /* return values */
1171 SV **cb;
1172 dSP;
1173
1174 GV *gv = CvGV (cx->blk_sub.cv);
1175 SV *fullname = sv_2mortal (newSV (0));
1176 if (isGV (gv))
1177 gv_efullname3 (fullname, gv, 0);
1178
1179 bot = PL_stack_base + cx->blk_oldsp + 1;
1180 top = cx->blk_gimme == G_ARRAY ? SP + 1
1181 : cx->blk_gimme == G_SCALAR ? bot + 1
1182 : bot;
1183
1184 av_extend (av, top - bot);
1185 while (bot < top)
1186 av_push (av, SvREFCNT_inc_NN (*bot++));
1187
1188 PL_runops = RUNOPS_DEFAULT;
1189 ENTER;
1190 SAVETMPS;
1191 EXTEND (SP, 3);
1192 PUSHMARK (SP);
1193 PUSHs (&PL_sv_no);
1194 PUSHs (fullname);
1195 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1196 PUTBACK;
1197 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1198 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1199 SPAGAIN;
1200 FREETMPS;
1201 LEAVE;
1202 PL_runops = runops_trace;
1203 }
1204
1205 if (oldcop != PL_curcop)
1206 {
1207 oldcop = PL_curcop;
1208
1209 if (PL_curcop != &PL_compiling)
1210 {
1211 SV **cb;
1212
1213 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1214 {
1215 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1216
1217 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1218 {
1219 dSP;
1220 GV *gv = CvGV (cx->blk_sub.cv);
1221 SV *fullname = sv_2mortal (newSV (0));
1222
1223 if (isGV (gv))
1224 gv_efullname3 (fullname, gv, 0);
1225
1226 PL_runops = RUNOPS_DEFAULT;
1227 ENTER;
1228 SAVETMPS;
1229 EXTEND (SP, 3);
1230 PUSHMARK (SP);
1231 PUSHs (&PL_sv_yes);
1232 PUSHs (fullname);
1233 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1234 PUTBACK;
1235 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1236 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1237 SPAGAIN;
1238 FREETMPS;
1239 LEAVE;
1240 PL_runops = runops_trace;
1241 }
1242
1243 oldcxix = cxstack_ix;
1244 }
1245
1246 if (cctx_current->flags & CC_TRACE_LINE)
1247 {
1248 dSP;
1249
1250 PL_runops = RUNOPS_DEFAULT;
1251 ENTER;
1252 SAVETMPS;
1253 EXTEND (SP, 3);
1254 PL_runops = RUNOPS_DEFAULT;
1255 PUSHMARK (SP);
1256 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1257 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1258 PUTBACK;
1259 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1260 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1261 SPAGAIN;
1262 FREETMPS;
1263 LEAVE;
1264 PL_runops = runops_trace;
1265 }
1266 }
1267 }
1268 }
1269 }
1270
1271 TAINT_NOT;
1272 return 0;
1273}
1274
1275static struct CoroSLF cctx_ssl_frame;
1276
1277static void
1278slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1279{
1280 ta->prev = 0;
1281}
1282
1283static int
1284slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1285{
1286 *frame = cctx_ssl_frame;
1287
1288 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1289}
1290
1291/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1292static void NOINLINE
1293cctx_prepare (pTHX)
1294{
1295 PL_top_env = &PL_start_env;
1296
1297 if (cctx_current->flags & CC_TRACE)
1298 PL_runops = runops_trace;
1299
1300 /* we already must be executing an SLF op, there is no other valid way
1301 * that can lead to creation of a new cctx */
1302 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1303 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1304
1305 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1306 cctx_ssl_frame = slf_frame;
1307
1308 slf_frame.prepare = slf_prepare_set_stacklevel;
1309 slf_frame.check = slf_check_set_stacklevel;
1310}
1311
1312/* the tail of transfer: execute stuff we can only do after a transfer */
1313INLINE void
1314transfer_tail (pTHX)
1315{
1316 free_coro_mortal (aTHX);
1317}
1318
1319/*
1320 * this is a _very_ stripped down perl interpreter ;)
1321 */
1322static void
1323cctx_run (void *arg)
1324{
1325#ifdef USE_ITHREADS
1326# if CORO_PTHREAD
1327 PERL_SET_CONTEXT (coro_thx);
1328# endif
1329#endif
1330 {
1331 dTHX;
1332
1333 /* normally we would need to skip the entersub here */
1334 /* not doing so will re-execute it, which is exactly what we want */
1335 /* PL_nop = PL_nop->op_next */
1336
1337 /* inject a fake subroutine call to cctx_init */
1338 cctx_prepare (aTHX);
1339
1340 /* cctx_run is the alternative tail of transfer() */
1341 transfer_tail (aTHX);
1342
1343 /* somebody or something will hit me for both perl_run and PL_restartop */
1344 PL_restartop = PL_op;
1345 perl_run (PL_curinterp);
1346 /*
1347 * Unfortunately, there is no way to get at the return values of the
1348 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1349 * runtime errors here, as this is just a random interpreter, not a thread.
1350 */
1351
1352 /*
1353 * If perl-run returns we assume exit() was being called or the coro
1354 * fell off the end, which seems to be the only valid (non-bug)
1355 * reason for perl_run to return. We try to exit by jumping to the
1356 * bootstrap-time "top" top_env, as we cannot restore the "main"
1357 * coroutine as Coro has no such concept.
1358 * This actually isn't valid with the pthread backend, but OSes requiring
1359 * that backend are too broken to do it in a standards-compliant way.
1360 */
1361 PL_top_env = main_top_env;
1362 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1363 }
1364}
1365
1366static coro_cctx *
1367cctx_new ()
1368{
1369 coro_cctx *cctx;
1370
1371 ++cctx_count;
1372 New (0, cctx, 1, coro_cctx);
1373
1374 cctx->gen = cctx_gen;
1375 cctx->flags = 0;
1376 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1377
1378 return cctx;
1379}
1380
1381/* create a new cctx only suitable as source */
1382static coro_cctx *
1383cctx_new_empty ()
1384{
1385 coro_cctx *cctx = cctx_new ();
1386
1387 cctx->sptr = 0;
1388 coro_create (&cctx->cctx, 0, 0, 0, 0);
1389
1390 return cctx;
1391}
1392
1393/* create a new cctx suitable as destination/running a perl interpreter */
1394static coro_cctx *
1395cctx_new_run ()
1396{
1397 coro_cctx *cctx = cctx_new ();
1398 void *stack_start;
1399 size_t stack_size;
1400
1401#if HAVE_MMAP
1402 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1403 /* mmap supposedly does allocate-on-write for us */
1404 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1405
1406 if (cctx->sptr != (void *)-1)
1407 {
1408 #if CORO_STACKGUARD
1409 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1410 #endif
1411 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1412 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1413 cctx->flags |= CC_MAPPED;
1414 }
1415 else
1416#endif
1417 {
1418 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1419 New (0, cctx->sptr, cctx_stacksize, long);
1420
1421 if (!cctx->sptr)
1422 {
1423 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1424 _exit (EXIT_FAILURE);
1425 }
1426
1427 stack_start = cctx->sptr;
1428 stack_size = cctx->ssize;
1429 }
1430
1431 #if CORO_USE_VALGRIND
1432 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1433 #endif
1434
1435 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1436
1437 return cctx;
1438}
1439
1440static void
1441cctx_destroy (coro_cctx *cctx)
1442{
1443 if (!cctx)
1444 return;
1445
1446 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1447
1448 --cctx_count;
1449 coro_destroy (&cctx->cctx);
1450
1451 /* coro_transfer creates new, empty cctx's */
1452 if (cctx->sptr)
1453 {
1454 #if CORO_USE_VALGRIND
1455 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1456 #endif
1457
1458#if HAVE_MMAP
1459 if (cctx->flags & CC_MAPPED)
1460 munmap (cctx->sptr, cctx->ssize);
1461 else
1462#endif
1463 Safefree (cctx->sptr);
1464 }
1465
1466 Safefree (cctx);
1467}
1468
1469/* wether this cctx should be destructed */
1470#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1471
1472static coro_cctx *
1473cctx_get (pTHX)
1474{
1475 while (expect_true (cctx_first))
1476 {
1477 coro_cctx *cctx = cctx_first;
1478 cctx_first = cctx->next;
1479 --cctx_idle;
1480
1481 if (expect_true (!CCTX_EXPIRED (cctx)))
1482 return cctx;
1483
1484 cctx_destroy (cctx);
1485 }
1486
1487 return cctx_new_run ();
1488}
1489
1490static void
1491cctx_put (coro_cctx *cctx)
1492{
1493 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1494
1495 /* free another cctx if overlimit */
1496 if (expect_false (cctx_idle >= cctx_max_idle))
1497 {
1498 coro_cctx *first = cctx_first;
1499 cctx_first = first->next;
1500 --cctx_idle;
1501
1502 cctx_destroy (first);
1503 }
1504
1505 ++cctx_idle;
1506 cctx->next = cctx_first;
1507 cctx_first = cctx;
1508}
1509
1510/** coroutine switching *****************************************************/
1511
1512static void
1513transfer_check (pTHX_ struct coro *prev, struct coro *next)
1514{
1515 /* TODO: throwing up here is considered harmful */
1516
1517 if (expect_true (prev != next))
1518 {
1519 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1520 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1521
1522 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1523 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1524
1525#if !PERL_VERSION_ATLEAST (5,10,0)
1526 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1527 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1528#endif
1529 }
1530}
1531
1532/* always use the TRANSFER macro */
1533static void NOINLINE /* noinline so we have a fixed stackframe */
1534transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1535{
1536 dSTACKLEVEL;
1537
1538 /* sometimes transfer is only called to set idle_sp */
1539 if (expect_false (!prev))
1540 {
1541 cctx_current->idle_sp = STACKLEVEL;
1542 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1543 }
1544 else if (expect_true (prev != next))
1545 {
1546 coro_cctx *cctx_prev;
1547
1548 if (expect_false (prev->flags & CF_NEW))
1549 {
1550 /* create a new empty/source context */
1551 prev->flags &= ~CF_NEW;
1552 prev->flags |= CF_RUNNING;
1553 }
1554
1555 prev->flags &= ~CF_RUNNING;
1556 next->flags |= CF_RUNNING;
1557
1558 /* first get rid of the old state */
1559 save_perl (aTHX_ prev);
1560
1561 if (expect_false (next->flags & CF_NEW))
1562 {
1563 /* need to start coroutine */
1564 next->flags &= ~CF_NEW;
1565 /* setup coroutine call */
1566 init_perl (aTHX_ next);
1567 }
1568 else
1569 load_perl (aTHX_ next);
1570
1571 /* possibly untie and reuse the cctx */
1572 if (expect_true (
1573 cctx_current->idle_sp == STACKLEVEL
1574 && !(cctx_current->flags & CC_TRACE)
1575 && !force_cctx
1576 ))
1577 {
1578 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1579 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1580
1581 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1582 /* without this the next cctx_get might destroy the running cctx while still in use */
1583 if (expect_false (CCTX_EXPIRED (cctx_current)))
1584 if (expect_true (!next->cctx))
1585 next->cctx = cctx_get (aTHX);
1586
1587 cctx_put (cctx_current);
1588 }
1589 else
1590 prev->cctx = cctx_current;
1591
1592 ++next->usecount;
1593
1594 cctx_prev = cctx_current;
1595 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1596
1597 next->cctx = 0;
1598
1599 if (expect_false (cctx_prev != cctx_current))
1600 {
1601 cctx_prev->top_env = PL_top_env;
1602 PL_top_env = cctx_current->top_env;
1603 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1604 }
1605
1606 transfer_tail (aTHX);
1607 }
1608}
1609
1610#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1611#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1612
1613/** high level stuff ********************************************************/
1614
1615static int
1616coro_state_destroy (pTHX_ struct coro *coro)
1617{
1618 if (coro->flags & CF_DESTROYED)
1619 return 0;
1620
1621 if (coro->on_destroy && !PL_dirty)
1622 coro->on_destroy (aTHX_ coro);
1623
1624 coro->flags |= CF_DESTROYED;
1625
1626 if (coro->flags & CF_READY)
1627 {
1628 /* reduce nready, as destroying a ready coro effectively unreadies it */
1629 /* alternative: look through all ready queues and remove the coro */
1630 --coro_nready;
1631 }
1632 else
1633 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1634
1635 if (coro->mainstack
1636 && coro->mainstack != main_mainstack
1637 && coro->slot
1638 && !PL_dirty)
1639 destroy_perl (aTHX_ coro);
1640
1641 if (coro->next) coro->next->prev = coro->prev;
1642 if (coro->prev) coro->prev->next = coro->next;
1643 if (coro == coro_first) coro_first = coro->next;
1644
1645 cctx_destroy (coro->cctx);
1646 SvREFCNT_dec (coro->startcv);
1647 SvREFCNT_dec (coro->args);
1648 SvREFCNT_dec (coro->swap_sv);
1649 SvREFCNT_dec (CORO_THROW);
1650
1651 return 1;
1652}
1653
1654static int
1655coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1656{
1657 struct coro *coro = (struct coro *)mg->mg_ptr;
1658 mg->mg_ptr = 0;
1659
1660 coro->hv = 0;
1661
1662 if (--coro->refcnt < 0)
1663 {
1664 coro_state_destroy (aTHX_ coro);
1665 Safefree (coro);
1666 }
1667
1668 return 0;
1669}
1670
1671static int
1672coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1673{
1674 struct coro *coro = (struct coro *)mg->mg_ptr;
1675
1676 ++coro->refcnt;
1677
1678 return 0;
1679}
1680
1681static MGVTBL coro_state_vtbl = {
1682 0, 0, 0, 0,
1683 coro_state_free,
1684 0,
1685#ifdef MGf_DUP
1686 coro_state_dup,
1687#else
1688# define MGf_DUP 0
1689#endif
1690};
1691
1692static void
1693prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1694{
1695 ta->prev = SvSTATE (prev_sv);
1696 ta->next = SvSTATE (next_sv);
1697 TRANSFER_CHECK (*ta);
1698}
1699
1700static void
1701api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1702{
1703 struct coro_transfer_args ta;
1704
1705 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1706 TRANSFER (ta, 1);
1707}
1708
1709/** Coro ********************************************************************/
1710
1711INLINE void
1712coro_enq (pTHX_ struct coro *coro)
1713{
1714 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1715
1716 SvREFCNT_inc_NN (coro->hv);
1717
1718 coro->next_ready = 0;
1719 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1720 ready [1] = coro;
1721}
1722
1723INLINE struct coro *
1724coro_deq (pTHX)
1725{
1726 int prio;
1727
1728 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1729 {
1730 struct coro **ready = coro_ready [prio];
1731
1732 if (ready [0])
1733 {
1734 struct coro *coro = ready [0];
1735 ready [0] = coro->next_ready;
1736 return coro;
1737 }
1738 }
1739
1740 return 0;
1741}
1742
1743static void
1744invoke_sv_ready_hook_helper (void)
1745{
1746 dTHX;
595 dSP; 1747 dSP;
596 Coro__State ctx = (Coro__State)arg;
597 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
598 1748
599 coro_init_stacks (aTHX); 1749 ENTER;
600 /*PL_curcop = 0;*/ 1750 SAVETMPS;
601 /*PL_in_eval = PL_in_eval;*/ /* inherit */
602 SvREFCNT_dec (GvAV (PL_defgv));
603 GvAV (PL_defgv) = ctx->args;
604 1751
605 SPAGAIN;
606
607 if (ctx->stack)
608 {
609 ctx->cursp = 0;
610
611 PUSHMARK(SP); 1752 PUSHMARK (SP);
612 PUTBACK; 1753 PUTBACK;
613 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1754 call_sv (coro_readyhook, G_VOID | G_DISCARD);
614 1755
615 if (SvTRUE (ERRSV)) 1756 FREETMPS;
616 croak (NULL); 1757 LEAVE;
617 else 1758}
618 croak ("FATAL: CCTXT coroutine returned!"); 1759
1760static int
1761api_ready (pTHX_ SV *coro_sv)
1762{
1763 struct coro *coro = SvSTATE (coro_sv);
1764
1765 if (coro->flags & CF_READY)
1766 return 0;
1767
1768 coro->flags |= CF_READY;
1769
1770 coro_enq (aTHX_ coro);
1771
1772 if (!coro_nready++)
1773 if (coroapi.readyhook)
1774 coroapi.readyhook ();
1775
1776 return 1;
1777}
1778
1779static int
1780api_is_ready (pTHX_ SV *coro_sv)
1781{
1782 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1783}
1784
1785/* expects to own a reference to next->hv */
1786INLINE void
1787prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1788{
1789 SV *prev_sv = SvRV (coro_current);
1790
1791 ta->prev = SvSTATE_hv (prev_sv);
1792 ta->next = next;
1793
1794 TRANSFER_CHECK (*ta);
1795
1796 SvRV_set (coro_current, (SV *)next->hv);
1797
1798 free_coro_mortal (aTHX);
1799 coro_mortal = prev_sv;
1800}
1801
1802static void
1803prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1804{
1805 for (;;)
619 } 1806 {
620 else 1807 struct coro *next = coro_deq (aTHX);
621 {
622 UNOP myop;
623 1808
624 PL_op = (OP *)&myop; 1809 if (expect_true (next))
625
626 Zero(&myop, 1, UNOP);
627 myop.op_next = Nullop;
628 myop.op_flags = OPf_WANT_VOID;
629
630 PUSHMARK(SP);
631 XPUSHs (sub_init);
632 /*
633 * the next line is slightly wrong, as PL_op->op_next
634 * is actually being executed so we skip the first op.
635 * that doesn't matter, though, since it is only
636 * pp_nextstate and we never return...
637 * ah yes, and I don't care anyways ;)
638 */
639 PUTBACK;
640 PL_op = pp_entersub();
641 SPAGAIN;
642
643 ENTER; /* necessary e.g. for dounwind */
644 }
645}
646
647static void
648continue_coro (void *arg)
649{
650 /*
651 * this is a _very_ stripped down perl interpreter ;)
652 */
653 Coro__State ctx = (Coro__State)arg;
654
655 /*FIXME*//* must set up top_env here */
656 ctx->cursp = 0;
657 PL_op = PL_op->op_next;
658 CALLRUNOPS(aTHX);
659
660 abort ();
661}
662
663STATIC void
664transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
665{
666 dSP;
667 dSTACKLEVEL;
668
669 if (prev != next)
670 {
671 if (next->mainstack)
672 { 1810 {
673 SAVE (prev, flags); 1811 /* cannot transfer to destroyed coros, skip and look for next */
674 LOAD (next); 1812 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
675 1813 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
676 /* mark this state as in-use */ 1814 else
677 next->mainstack = 0;
678 next->tmps_ix = -2;
679
680 /* stacklevel changed? if yes, grab the stack for us! */
681 if (flags & TRANSFER_SAVE_CCTXT)
682 { 1815 {
683 if (!prev->stack) 1816 next->flags &= ~CF_READY;
684 allocate_stack (prev, 0); 1817 --coro_nready;
685 else if (prev->cursp != stacklevel 1818
686 && prev->stack->usecnt > 1) 1819 prepare_schedule_to (aTHX_ ta, next);
687 { 1820 break;
688 prev->gencnt = ++prev->stack->gencnt;
689 prev->stack->usecnt = 1;
690 }
691
692 /* has our stack been invalidated? */
693 if (next->stack && next->stack->gencnt != next->gencnt)
694 {
695 deallocate_stack (next);
696 allocate_stack (next, 1);
697 coro_create (&(next->stack->cctx),
698 continue_coro, (void *)next,
699 next->stack->sptr, labs (next->stack->ssize));
700 }
701
702 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703 } 1821 }
704
705 } 1822 }
706 else if (next->tmps_ix == -2)
707 croak ("tried to transfer to running coroutine");
708 else 1823 else
709 { 1824 {
710 SAVE (prev, -1); /* first get rid of the old state */ 1825 /* nothing to schedule: call the idle handler */
711 1826 if (SvROK (sv_idle)
712 if (flags & TRANSFER_SAVE_CCTXT) 1827 && SvOBJECT (SvRV (sv_idle)))
713 { 1828 {
714 if (!prev->stack) 1829 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
715 allocate_stack (prev, 0); 1830 api_ready (aTHX_ SvRV (sv_idle));
716 1831 --coro_nready;
717 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718 {
719 setup_coro (next);
720
721 prev->stack->refcnt++;
722 prev->stack->usecnt++;
723 next->stack = prev->stack;
724 next->gencnt = prev->gencnt;
725 }
726 else
727 {
728 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx),
730 setup_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize));
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733 }
734 } 1832 }
735 else 1833 else
736 setup_coro (next); 1834 {
1835 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1836 dSP;
1837
1838 ENTER;
1839 SAVETMPS;
1840
1841 PUSHMARK (SP);
1842 PUTBACK;
1843 call_sv (sv_idle, G_VOID | G_DISCARD);
1844
1845 FREETMPS;
1846 LEAVE;
1847 }
737 } 1848 }
738 } 1849 }
739
740 next->cursp = stacklevel;
741} 1850}
742 1851
743static struct coro * 1852INLINE void
744sv_to_coro (SV *arg, const char *funcname, const char *varname) 1853prepare_cede (pTHX_ struct coro_transfer_args *ta)
745{ 1854{
746 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 1855 api_ready (aTHX_ coro_current);
747 { 1856 prepare_schedule (aTHX_ ta);
748 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 1857}
749 1858
750 if (!he) 1859INLINE void
751 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); 1860prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1861{
1862 SV *prev = SvRV (coro_current);
752 1863
753 arg = HeVAL(he); 1864 if (coro_nready)
754 } 1865 {
1866 prepare_schedule (aTHX_ ta);
1867 api_ready (aTHX_ prev);
755 1868 }
756 /* must also be changed inside Coro::Cont::yield */
757 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758 return (struct coro *) SvIV((SV*)SvRV(arg));
759 else 1869 else
760 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); 1870 prepare_nop (aTHX_ ta);
761} 1871}
762 1872
1873static void
1874api_schedule (pTHX)
1875{
1876 struct coro_transfer_args ta;
1877
1878 prepare_schedule (aTHX_ &ta);
1879 TRANSFER (ta, 1);
1880}
1881
1882static void
1883api_schedule_to (pTHX_ SV *coro_sv)
1884{
1885 struct coro_transfer_args ta;
1886 struct coro *next = SvSTATE (coro_sv);
1887
1888 SvREFCNT_inc_NN (coro_sv);
1889 prepare_schedule_to (aTHX_ &ta, next);
1890}
1891
763static void 1892static int
764api_transfer(pTHX_ SV *prev, SV *next, int flags) 1893api_cede (pTHX)
765{ 1894{
766 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"), 1895 struct coro_transfer_args ta;
767 sv_to_coro (next, "Coro::transfer", "next"),
768 flags);
769}
770 1896
771/** Coro ********************************************************************/ 1897 prepare_cede (aTHX_ &ta);
772 1898
773#define PRIO_MAX 3 1899 if (expect_true (ta.prev != ta.next))
774#define PRIO_HIGH 1 1900 {
775#define PRIO_NORMAL 0 1901 TRANSFER (ta, 1);
776#define PRIO_LOW -1 1902 return 1;
777#define PRIO_IDLE -3
778#define PRIO_MIN -4
779
780/* for Coro.pm */
781static GV *coro_current, *coro_idle;
782static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
783static int coro_nready;
784
785static void
786coro_enq (SV *sv)
787{
788 if (SvROK (sv))
789 { 1903 }
790 SV *hv = SvRV (sv); 1904 else
791 if (SvTYPE (hv) == SVt_PVHV) 1905 return 0;
1906}
1907
1908static int
1909api_cede_notself (pTHX)
1910{
1911 if (coro_nready)
1912 {
1913 struct coro_transfer_args ta;
1914
1915 prepare_cede_notself (aTHX_ &ta);
1916 TRANSFER (ta, 1);
1917 return 1;
1918 }
1919 else
1920 return 0;
1921}
1922
1923static void
1924api_trace (pTHX_ SV *coro_sv, int flags)
1925{
1926 struct coro *coro = SvSTATE (coro_sv);
1927
1928 if (coro->flags & CF_RUNNING)
1929 croak ("cannot enable tracing on a running coroutine, caught");
1930
1931 if (flags & CC_TRACE)
1932 {
1933 if (!coro->cctx)
1934 coro->cctx = cctx_new_run ();
1935 else if (!(coro->cctx->flags & CC_TRACE))
1936 croak ("cannot enable tracing on coroutine with custom stack, caught");
1937
1938 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1939 }
1940 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1941 {
1942 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1943
1944 if (coro->flags & CF_RUNNING)
1945 PL_runops = RUNOPS_DEFAULT;
1946 else
1947 coro->slot->runops = RUNOPS_DEFAULT;
1948 }
1949}
1950
1951static void
1952coro_call_on_destroy (pTHX_ struct coro *coro)
1953{
1954 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1955 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1956
1957 if (on_destroyp)
1958 {
1959 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1960
1961 while (AvFILLp (on_destroy) >= 0)
792 { 1962 {
793 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 1963 dSP; /* don't disturb outer sp */
794 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1964 SV *cb = av_pop (on_destroy);
795 1965
796 prio = prio > PRIO_MAX ? PRIO_MAX 1966 PUSHMARK (SP);
797 : prio < PRIO_MIN ? PRIO_MIN 1967
1968 if (statusp)
1969 {
798 : prio; 1970 int i;
1971 AV *status = (AV *)SvRV (*statusp);
1972 EXTEND (SP, AvFILLp (status) + 1);
799 1973
800 av_push (coro_ready [prio - PRIO_MIN], sv); 1974 for (i = 0; i <= AvFILLp (status); ++i)
801 coro_nready++; 1975 PUSHs (AvARRAY (status)[i]);
1976 }
802 1977
803 return; 1978 PUTBACK;
1979 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
804 } 1980 }
805 } 1981 }
1982}
806 1983
807 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1984static void
1985slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1986{
1987 int i;
1988 HV *hv = (HV *)SvRV (coro_current);
1989 AV *av = newAV ();
1990
1991 /* items are actually not so common, so optimise for this case */
1992 if (items)
1993 {
1994 av_extend (av, items - 1);
1995
1996 for (i = 0; i < items; ++i)
1997 av_push (av, SvREFCNT_inc_NN (arg [i]));
1998 }
1999
2000 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2001
2002 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2003 api_ready (aTHX_ sv_manager);
2004
2005 frame->prepare = prepare_schedule;
2006 frame->check = slf_check_repeat;
2007
2008 /* as a minor optimisation, we could unwind all stacks here */
2009 /* but that puts extra pressure on pp_slf, and is not worth much */
2010 /*coro_unwind_stacks (aTHX);*/
2011}
2012
2013/*****************************************************************************/
2014/* async pool handler */
2015
2016static int
2017slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2018{
2019 HV *hv = (HV *)SvRV (coro_current);
2020 struct coro *coro = (struct coro *)frame->data;
2021
2022 if (!coro->invoke_cb)
2023 return 1; /* loop till we have invoke */
2024 else
2025 {
2026 hv_store (hv, "desc", sizeof ("desc") - 1,
2027 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2028
2029 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2030
2031 {
2032 dSP;
2033 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2034 PUTBACK;
2035 }
2036
2037 SvREFCNT_dec (GvAV (PL_defgv));
2038 GvAV (PL_defgv) = coro->invoke_av;
2039 coro->invoke_av = 0;
2040
2041 return 0;
2042 }
2043}
2044
2045static void
2046slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2047{
2048 HV *hv = (HV *)SvRV (coro_current);
2049 struct coro *coro = SvSTATE_hv ((SV *)hv);
2050
2051 if (expect_true (coro->saved_deffh))
2052 {
2053 /* subsequent iteration */
2054 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2055 coro->saved_deffh = 0;
2056
2057 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2058 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2059 {
2060 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2061 coro->invoke_av = newAV ();
2062
2063 frame->prepare = prepare_nop;
2064 }
2065 else
2066 {
2067 av_clear (GvAV (PL_defgv));
2068 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2069
2070 coro->prio = 0;
2071
2072 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2073 api_trace (aTHX_ coro_current, 0);
2074
2075 frame->prepare = prepare_schedule;
2076 av_push (av_async_pool, SvREFCNT_inc (hv));
2077 }
2078 }
2079 else
2080 {
2081 /* first iteration, simply fall through */
2082 frame->prepare = prepare_nop;
2083 }
2084
2085 frame->check = slf_check_pool_handler;
2086 frame->data = (void *)coro;
2087}
2088
2089/*****************************************************************************/
2090/* rouse callback */
2091
2092#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2093
2094static void
2095coro_rouse_callback (pTHX_ CV *cv)
2096{
2097 dXSARGS;
2098 SV *data = (SV *)S_GENSUB_ARG;
2099
2100 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2101 {
2102 /* first call, set args */
2103 SV *coro = SvRV (data);
2104 AV *av = newAV ();
2105
2106 SvRV_set (data, (SV *)av);
2107
2108 /* better take a full copy of the arguments */
2109 while (items--)
2110 av_store (av, items, newSVsv (ST (items)));
2111
2112 api_ready (aTHX_ coro);
2113 SvREFCNT_dec (coro);
2114 }
2115
2116 XSRETURN_EMPTY;
2117}
2118
2119static int
2120slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2121{
2122 SV *data = (SV *)frame->data;
2123
2124 if (CORO_THROW)
2125 return 0;
2126
2127 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2128 return 1;
2129
2130 /* now push all results on the stack */
2131 {
2132 dSP;
2133 AV *av = (AV *)SvRV (data);
2134 int i;
2135
2136 EXTEND (SP, AvFILLp (av) + 1);
2137 for (i = 0; i <= AvFILLp (av); ++i)
2138 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2139
2140 /* we have stolen the elements, so set length to zero and free */
2141 AvFILLp (av) = -1;
2142 av_undef (av);
2143
2144 PUTBACK;
2145 }
2146
2147 return 0;
2148}
2149
2150static void
2151slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2152{
2153 SV *cb;
2154
2155 if (items)
2156 cb = arg [0];
2157 else
2158 {
2159 struct coro *coro = SvSTATE_current;
2160
2161 if (!coro->rouse_cb)
2162 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2163
2164 cb = sv_2mortal (coro->rouse_cb);
2165 coro->rouse_cb = 0;
2166 }
2167
2168 if (!SvROK (cb)
2169 || SvTYPE (SvRV (cb)) != SVt_PVCV
2170 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2171 croak ("Coro::rouse_wait called with illegal callback argument,");
2172
2173 {
2174 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2175 SV *data = (SV *)S_GENSUB_ARG;
2176
2177 frame->data = (void *)data;
2178 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2179 frame->check = slf_check_rouse_wait;
2180 }
808} 2181}
809 2182
810static SV * 2183static SV *
811coro_deq (int min_prio) 2184coro_new_rouse_cb (pTHX)
812{ 2185{
813 int prio = PRIO_MAX - PRIO_MIN; 2186 HV *hv = (HV *)SvRV (coro_current);
2187 struct coro *coro = SvSTATE_hv (hv);
2188 SV *data = newRV_inc ((SV *)hv);
2189 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
814 2190
815 min_prio -= PRIO_MIN; 2191 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
816 if (min_prio < 0) 2192 SvREFCNT_dec (data); /* magicext increases the refcount */
817 min_prio = 0;
818 2193
819 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2194 SvREFCNT_dec (coro->rouse_cb);
820 if (av_len (coro_ready[prio]) >= 0) 2195 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2196
2197 return cb;
2198}
2199
2200/*****************************************************************************/
2201/* schedule-like-function opcode (SLF) */
2202
2203static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2204static const CV *slf_cv;
2205static SV **slf_argv;
2206static int slf_argc, slf_arga; /* count, allocated */
2207static I32 slf_ax; /* top of stack, for restore */
2208
2209/* this restores the stack in the case we patched the entersub, to */
2210/* recreate the stack frame as perl will on following calls */
2211/* since entersub cleared the stack */
2212static OP *
2213pp_restore (pTHX)
2214{
2215 int i;
2216 SV **SP = PL_stack_base + slf_ax;
2217
2218 PUSHMARK (SP);
2219
2220 EXTEND (SP, slf_argc + 1);
2221
2222 for (i = 0; i < slf_argc; ++i)
2223 PUSHs (sv_2mortal (slf_argv [i]));
2224
2225 PUSHs ((SV *)CvGV (slf_cv));
2226
2227 RETURNOP (slf_restore.op_first);
2228}
2229
2230static void
2231slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2232{
2233 SV **arg = (SV **)slf_frame.data;
2234
2235 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2236}
2237
2238static void
2239slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2240{
2241 if (items != 2)
2242 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2243
2244 frame->prepare = slf_prepare_transfer;
2245 frame->check = slf_check_nop;
2246 frame->data = (void *)arg; /* let's hope it will stay valid */
2247}
2248
2249static void
2250slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2251{
2252 frame->prepare = prepare_schedule;
2253 frame->check = slf_check_nop;
2254}
2255
2256static void
2257slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2258{
2259 struct coro *next = (struct coro *)slf_frame.data;
2260
2261 SvREFCNT_inc_NN (next->hv);
2262 prepare_schedule_to (aTHX_ ta, next);
2263}
2264
2265static void
2266slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2267{
2268 if (!items)
2269 croak ("Coro::schedule_to expects a coroutine argument, caught");
2270
2271 frame->data = (void *)SvSTATE (arg [0]);
2272 frame->prepare = slf_prepare_schedule_to;
2273 frame->check = slf_check_nop;
2274}
2275
2276static void
2277slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2278{
2279 api_ready (aTHX_ SvRV (coro_current));
2280
2281 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2282}
2283
2284static void
2285slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2286{
2287 frame->prepare = prepare_cede;
2288 frame->check = slf_check_nop;
2289}
2290
2291static void
2292slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2293{
2294 frame->prepare = prepare_cede_notself;
2295 frame->check = slf_check_nop;
2296}
2297
2298/*
2299 * these not obviously related functions are all rolled into one
2300 * function to increase chances that they all will call transfer with the same
2301 * stack offset
2302 * SLF stands for "schedule-like-function".
2303 */
2304static OP *
2305pp_slf (pTHX)
2306{
2307 I32 checkmark; /* mark SP to see how many elements check has pushed */
2308
2309 /* set up the slf frame, unless it has already been set-up */
2310 /* the latter happens when a new coro has been started */
2311 /* or when a new cctx was attached to an existing coroutine */
2312 if (expect_true (!slf_frame.prepare))
2313 {
2314 /* first iteration */
2315 dSP;
2316 SV **arg = PL_stack_base + TOPMARK + 1;
2317 int items = SP - arg; /* args without function object */
2318 SV *gv = *sp;
2319
2320 /* do a quick consistency check on the "function" object, and if it isn't */
2321 /* for us, divert to the real entersub */
2322 if (SvTYPE (gv) != SVt_PVGV
2323 || !GvCV (gv)
2324 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2325 return PL_ppaddr[OP_ENTERSUB](aTHX);
2326
2327 if (!(PL_op->op_flags & OPf_STACKED))
821 { 2328 {
822 coro_nready--; 2329 /* ampersand-form of call, use @_ instead of stack */
823 return av_shift (coro_ready[prio]); 2330 AV *av = GvAV (PL_defgv);
2331 arg = AvARRAY (av);
2332 items = AvFILLp (av) + 1;
824 } 2333 }
2334
2335 /* now call the init function, which needs to set up slf_frame */
2336 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2337 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2338
2339 /* pop args */
2340 SP = PL_stack_base + POPMARK;
2341
2342 PUTBACK;
2343 }
2344
2345 /* now that we have a slf_frame, interpret it! */
2346 /* we use a callback system not to make the code needlessly */
2347 /* complicated, but so we can run multiple perl coros from one cctx */
2348
2349 do
2350 {
2351 struct coro_transfer_args ta;
2352
2353 slf_frame.prepare (aTHX_ &ta);
2354 TRANSFER (ta, 0);
2355
2356 checkmark = PL_stack_sp - PL_stack_base;
2357 }
2358 while (slf_frame.check (aTHX_ &slf_frame));
2359
2360 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2361
2362 /* exception handling */
2363 if (expect_false (CORO_THROW))
2364 {
2365 SV *exception = sv_2mortal (CORO_THROW);
2366
2367 CORO_THROW = 0;
2368 sv_setsv (ERRSV, exception);
2369 croak (0);
2370 }
2371
2372 /* return value handling - mostly like entersub */
2373 /* make sure we put something on the stack in scalar context */
2374 if (GIMME_V == G_SCALAR)
2375 {
2376 dSP;
2377 SV **bot = PL_stack_base + checkmark;
2378
2379 if (sp == bot) /* too few, push undef */
2380 bot [1] = &PL_sv_undef;
2381 else if (sp != bot + 1) /* too many, take last one */
2382 bot [1] = *sp;
2383
2384 SP = bot + 1;
2385
2386 PUTBACK;
2387 }
2388
2389 return NORMAL;
2390}
2391
2392static void
2393api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2394{
2395 int i;
2396 SV **arg = PL_stack_base + ax;
2397 int items = PL_stack_sp - arg + 1;
2398
2399 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2400
2401 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2402 && PL_op->op_ppaddr != pp_slf)
2403 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2404
2405 CvFLAGS (cv) |= CVf_SLF;
2406 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2407 slf_cv = cv;
2408
2409 /* we patch the op, and then re-run the whole call */
2410 /* we have to put the same argument on the stack for this to work */
2411 /* and this will be done by pp_restore */
2412 slf_restore.op_next = (OP *)&slf_restore;
2413 slf_restore.op_type = OP_CUSTOM;
2414 slf_restore.op_ppaddr = pp_restore;
2415 slf_restore.op_first = PL_op;
2416
2417 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2418
2419 if (PL_op->op_flags & OPf_STACKED)
2420 {
2421 if (items > slf_arga)
2422 {
2423 slf_arga = items;
2424 free (slf_argv);
2425 slf_argv = malloc (slf_arga * sizeof (SV *));
2426 }
2427
2428 slf_argc = items;
2429
2430 for (i = 0; i < items; ++i)
2431 slf_argv [i] = SvREFCNT_inc (arg [i]);
2432 }
2433 else
2434 slf_argc = 0;
2435
2436 PL_op->op_ppaddr = pp_slf;
2437 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2438
2439 PL_op = (OP *)&slf_restore;
2440}
2441
2442/*****************************************************************************/
2443/* dynamic wind */
2444
2445static void
2446on_enterleave_call (pTHX_ SV *cb)
2447{
2448 dSP;
2449
2450 PUSHSTACK;
2451
2452 PUSHMARK (SP);
2453 PUTBACK;
2454 call_sv (cb, G_VOID | G_DISCARD);
2455 SPAGAIN;
2456
2457 POPSTACK;
2458}
2459
2460static SV *
2461coro_avp_pop_and_free (pTHX_ AV **avp)
2462{
2463 AV *av = *avp;
2464 SV *res = av_pop (av);
2465
2466 if (AvFILLp (av) < 0)
2467 {
2468 *avp = 0;
2469 SvREFCNT_dec (av);
2470 }
2471
2472 return res;
2473}
2474
2475static void
2476coro_pop_on_enter (pTHX_ void *coro)
2477{
2478 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2479 SvREFCNT_dec (cb);
2480}
2481
2482static void
2483coro_pop_on_leave (pTHX_ void *coro)
2484{
2485 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2486 on_enterleave_call (aTHX_ sv_2mortal (cb));
2487}
2488
2489/*****************************************************************************/
2490/* PerlIO::cede */
2491
2492typedef struct
2493{
2494 PerlIOBuf base;
2495 NV next, every;
2496} PerlIOCede;
2497
2498static IV
2499PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2500{
2501 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2502
2503 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2504 self->next = nvtime () + self->every;
2505
2506 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2507}
2508
2509static SV *
2510PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2511{
2512 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2513
2514 return newSVnv (self->every);
2515}
2516
2517static IV
2518PerlIOCede_flush (pTHX_ PerlIO *f)
2519{
2520 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2521 double now = nvtime ();
2522
2523 if (now >= self->next)
2524 {
2525 api_cede (aTHX);
2526 self->next = now + self->every;
2527 }
2528
2529 return PerlIOBuf_flush (aTHX_ f);
2530}
2531
2532static PerlIO_funcs PerlIO_cede =
2533{
2534 sizeof(PerlIO_funcs),
2535 "cede",
2536 sizeof(PerlIOCede),
2537 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2538 PerlIOCede_pushed,
2539 PerlIOBuf_popped,
2540 PerlIOBuf_open,
2541 PerlIOBase_binmode,
2542 PerlIOCede_getarg,
2543 PerlIOBase_fileno,
2544 PerlIOBuf_dup,
2545 PerlIOBuf_read,
2546 PerlIOBuf_unread,
2547 PerlIOBuf_write,
2548 PerlIOBuf_seek,
2549 PerlIOBuf_tell,
2550 PerlIOBuf_close,
2551 PerlIOCede_flush,
2552 PerlIOBuf_fill,
2553 PerlIOBase_eof,
2554 PerlIOBase_error,
2555 PerlIOBase_clearerr,
2556 PerlIOBase_setlinebuf,
2557 PerlIOBuf_get_base,
2558 PerlIOBuf_bufsiz,
2559 PerlIOBuf_get_ptr,
2560 PerlIOBuf_get_cnt,
2561 PerlIOBuf_set_ptrcnt,
2562};
2563
2564/*****************************************************************************/
2565/* Coro::Semaphore & Coro::Signal */
2566
2567static SV *
2568coro_waitarray_new (pTHX_ int count)
2569{
2570 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2571 AV *av = newAV ();
2572 SV **ary;
2573
2574 /* unfortunately, building manually saves memory */
2575 Newx (ary, 2, SV *);
2576 AvALLOC (av) = ary;
2577#if PERL_VERSION_ATLEAST (5,10,0)
2578 AvARRAY (av) = ary;
2579#else
2580 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2581 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2582 SvPVX ((SV *)av) = (char *)ary;
2583#endif
2584 AvMAX (av) = 1;
2585 AvFILLp (av) = 0;
2586 ary [0] = newSViv (count);
2587
2588 return newRV_noinc ((SV *)av);
2589}
2590
2591/* semaphore */
2592
2593static void
2594coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2595{
2596 SV *count_sv = AvARRAY (av)[0];
2597 IV count = SvIVX (count_sv);
2598
2599 count += adjust;
2600 SvIVX (count_sv) = count;
2601
2602 /* now wake up as many waiters as are expected to lock */
2603 while (count > 0 && AvFILLp (av) > 0)
2604 {
2605 SV *cb;
2606
2607 /* swap first two elements so we can shift a waiter */
2608 AvARRAY (av)[0] = AvARRAY (av)[1];
2609 AvARRAY (av)[1] = count_sv;
2610 cb = av_shift (av);
2611
2612 if (SvOBJECT (cb))
2613 {
2614 api_ready (aTHX_ cb);
2615 --count;
2616 }
2617 else if (SvTYPE (cb) == SVt_PVCV)
2618 {
2619 dSP;
2620 PUSHMARK (SP);
2621 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2622 PUTBACK;
2623 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2624 }
2625
2626 SvREFCNT_dec (cb);
2627 }
2628}
2629
2630static void
2631coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2632{
2633 /* call $sem->adjust (0) to possibly wake up some other waiters */
2634 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2635}
2636
2637static int
2638slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2639{
2640 AV *av = (AV *)frame->data;
2641 SV *count_sv = AvARRAY (av)[0];
2642
2643 /* if we are about to throw, don't actually acquire the lock, just throw */
2644 if (CORO_THROW)
2645 return 0;
2646 else if (SvIVX (count_sv) > 0)
2647 {
2648 SvSTATE_current->on_destroy = 0;
2649
2650 if (acquire)
2651 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2652 else
2653 coro_semaphore_adjust (aTHX_ av, 0);
2654
2655 return 0;
2656 }
2657 else
2658 {
2659 int i;
2660 /* if we were woken up but can't down, we look through the whole */
2661 /* waiters list and only add us if we aren't in there already */
2662 /* this avoids some degenerate memory usage cases */
2663
2664 for (i = 1; i <= AvFILLp (av); ++i)
2665 if (AvARRAY (av)[i] == SvRV (coro_current))
2666 return 1;
2667
2668 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2669 return 1;
2670 }
2671}
2672
2673static int
2674slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2675{
2676 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2677}
2678
2679static int
2680slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2681{
2682 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2683}
2684
2685static void
2686slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2687{
2688 AV *av = (AV *)SvRV (arg [0]);
2689
2690 if (SvIVX (AvARRAY (av)[0]) > 0)
2691 {
2692 frame->data = (void *)av;
2693 frame->prepare = prepare_nop;
2694 }
2695 else
2696 {
2697 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2698
2699 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2700 frame->prepare = prepare_schedule;
2701
2702 /* to avoid race conditions when a woken-up coro gets terminated */
2703 /* we arrange for a temporary on_destroy that calls adjust (0) */
2704 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2705 }
2706}
2707
2708static void
2709slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2710{
2711 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2712 frame->check = slf_check_semaphore_down;
2713}
2714
2715static void
2716slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2717{
2718 if (items >= 2)
2719 {
2720 /* callback form */
2721 AV *av = (AV *)SvRV (arg [0]);
2722 SV *cb_cv = s_get_cv_croak (arg [1]);
2723
2724 av_push (av, SvREFCNT_inc_NN (cb_cv));
2725
2726 if (SvIVX (AvARRAY (av)[0]) > 0)
2727 coro_semaphore_adjust (aTHX_ av, 0);
2728
2729 frame->prepare = prepare_nop;
2730 frame->check = slf_check_nop;
2731 }
2732 else
2733 {
2734 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2735 frame->check = slf_check_semaphore_wait;
2736 }
2737}
2738
2739/* signal */
2740
2741static void
2742coro_signal_wake (pTHX_ AV *av, int count)
2743{
2744 SvIVX (AvARRAY (av)[0]) = 0;
2745
2746 /* now signal count waiters */
2747 while (count > 0 && AvFILLp (av) > 0)
2748 {
2749 SV *cb;
2750
2751 /* swap first two elements so we can shift a waiter */
2752 cb = AvARRAY (av)[0];
2753 AvARRAY (av)[0] = AvARRAY (av)[1];
2754 AvARRAY (av)[1] = cb;
2755
2756 cb = av_shift (av);
2757
2758 if (SvTYPE (cb) == SVt_PVCV)
2759 {
2760 dSP;
2761 PUSHMARK (SP);
2762 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2763 PUTBACK;
2764 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2765 }
2766 else
2767 {
2768 api_ready (aTHX_ cb);
2769 sv_setiv (cb, 0); /* signal waiter */
2770 }
2771
2772 SvREFCNT_dec (cb);
2773
2774 --count;
2775 }
2776}
2777
2778static int
2779slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2780{
2781 /* if we are about to throw, also stop waiting */
2782 return SvROK ((SV *)frame->data) && !CORO_THROW;
2783}
2784
2785static void
2786slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2787{
2788 AV *av = (AV *)SvRV (arg [0]);
2789
2790 if (items >= 2)
2791 {
2792 SV *cb_cv = s_get_cv_croak (arg [1]);
2793 av_push (av, SvREFCNT_inc_NN (cb_cv));
2794
2795 if (SvIVX (AvARRAY (av)[0]))
2796 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2797
2798 frame->prepare = prepare_nop;
2799 frame->check = slf_check_nop;
2800 }
2801 else if (SvIVX (AvARRAY (av)[0]))
2802 {
2803 SvIVX (AvARRAY (av)[0]) = 0;
2804 frame->prepare = prepare_nop;
2805 frame->check = slf_check_nop;
2806 }
2807 else
2808 {
2809 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2810
2811 av_push (av, waiter);
2812
2813 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2814 frame->prepare = prepare_schedule;
2815 frame->check = slf_check_signal_wait;
2816 }
2817}
2818
2819/*****************************************************************************/
2820/* Coro::AIO */
2821
2822#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2823
2824/* helper storage struct */
2825struct io_state
2826{
2827 int errorno;
2828 I32 laststype; /* U16 in 5.10.0 */
2829 int laststatval;
2830 Stat_t statcache;
2831};
2832
2833static void
2834coro_aio_callback (pTHX_ CV *cv)
2835{
2836 dXSARGS;
2837 AV *state = (AV *)S_GENSUB_ARG;
2838 SV *coro = av_pop (state);
2839 SV *data_sv = newSV (sizeof (struct io_state));
2840
2841 av_extend (state, items - 1);
2842
2843 sv_upgrade (data_sv, SVt_PV);
2844 SvCUR_set (data_sv, sizeof (struct io_state));
2845 SvPOK_only (data_sv);
2846
2847 {
2848 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2849
2850 data->errorno = errno;
2851 data->laststype = PL_laststype;
2852 data->laststatval = PL_laststatval;
2853 data->statcache = PL_statcache;
2854 }
2855
2856 /* now build the result vector out of all the parameters and the data_sv */
2857 {
2858 int i;
2859
2860 for (i = 0; i < items; ++i)
2861 av_push (state, SvREFCNT_inc_NN (ST (i)));
2862 }
2863
2864 av_push (state, data_sv);
2865
2866 api_ready (aTHX_ coro);
2867 SvREFCNT_dec (coro);
2868 SvREFCNT_dec ((AV *)state);
2869}
2870
2871static int
2872slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2873{
2874 AV *state = (AV *)frame->data;
2875
2876 /* if we are about to throw, return early */
2877 /* this does not cancel the aio request, but at least */
2878 /* it quickly returns */
2879 if (CORO_THROW)
2880 return 0;
2881
2882 /* one element that is an RV? repeat! */
2883 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2884 return 1;
2885
2886 /* restore status */
2887 {
2888 SV *data_sv = av_pop (state);
2889 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2890
2891 errno = data->errorno;
2892 PL_laststype = data->laststype;
2893 PL_laststatval = data->laststatval;
2894 PL_statcache = data->statcache;
2895
2896 SvREFCNT_dec (data_sv);
2897 }
2898
2899 /* push result values */
2900 {
2901 dSP;
2902 int i;
2903
2904 EXTEND (SP, AvFILLp (state) + 1);
2905 for (i = 0; i <= AvFILLp (state); ++i)
2906 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2907
2908 PUTBACK;
2909 }
825 2910
826 return 0; 2911 return 0;
827} 2912}
828 2913
829static void 2914static void
830api_ready (SV *coro) 2915slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
831{ 2916{
832 coro_enq (SvREFCNT_inc (coro)); 2917 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
833} 2918 SV *coro_hv = SvRV (coro_current);
2919 struct coro *coro = SvSTATE_hv (coro_hv);
834 2920
835static void 2921 /* put our coroutine id on the state arg */
836api_schedule (int cede) 2922 av_push (state, SvREFCNT_inc_NN (coro_hv));
837{
838 SV *prev, *next;
839 2923
840 prev = GvSV (coro_current); 2924 /* first see whether we have a non-zero priority and set it as AIO prio */
2925 if (coro->prio)
2926 {
2927 dSP;
841 2928
842 if (cede) 2929 static SV *prio_cv;
843 coro_enq (SvREFCNT_inc (prev)); 2930 static SV *prio_sv;
844 2931
845 next = coro_deq (PRIO_MIN); 2932 if (expect_false (!prio_cv))
2933 {
2934 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2935 prio_sv = newSViv (0);
2936 }
846 2937
847 if (!next) 2938 PUSHMARK (SP);
848 next = SvREFCNT_inc (GvSV (coro_idle)); 2939 sv_setiv (prio_sv, coro->prio);
2940 XPUSHs (prio_sv);
849 2941
850 GvSV (coro_current) = SvREFCNT_inc (next); 2942 PUTBACK;
851 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 2943 call_sv (prio_cv, G_VOID | G_DISCARD);
852 sv_to_coro (next, "Coro::schedule", "next coroutine"), 2944 }
853 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
854 SvREFCNT_dec (next);
855 SvREFCNT_dec (prev);
856}
857 2945
2946 /* now call the original request */
2947 {
2948 dSP;
2949 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2950 int i;
2951
2952 PUSHMARK (SP);
2953
2954 /* first push all args to the stack */
2955 EXTEND (SP, items + 1);
2956
2957 for (i = 0; i < items; ++i)
2958 PUSHs (arg [i]);
2959
2960 /* now push the callback closure */
2961 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2962
2963 /* now call the AIO function - we assume our request is uncancelable */
2964 PUTBACK;
2965 call_sv ((SV *)req, G_VOID | G_DISCARD);
2966 }
2967
2968 /* now that the requets is going, we loop toll we have a result */
2969 frame->data = (void *)state;
2970 frame->prepare = prepare_schedule;
2971 frame->check = slf_check_aio_req;
2972}
2973
2974static void
2975coro_aio_req_xs (pTHX_ CV *cv)
2976{
2977 dXSARGS;
2978
2979 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2980
2981 XSRETURN_EMPTY;
2982}
2983
2984/*****************************************************************************/
2985
2986#if CORO_CLONE
2987# include "clone.c"
2988#endif
2989
2990/*****************************************************************************/
2991
2992static SV *
2993coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2994{
2995 SV *coro_sv;
2996 struct coro *coro;
2997 MAGIC *mg;
2998 HV *hv;
2999 SV *cb;
3000 int i;
3001
3002 if (argc > 0)
3003 {
3004 cb = s_get_cv_croak (argv [0]);
3005
3006 if (!is_coro)
3007 {
3008 if (CvISXSUB (cb))
3009 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3010
3011 if (!CvROOT (cb))
3012 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3013 }
3014 }
3015
3016 Newz (0, coro, 1, struct coro);
3017 coro->args = newAV ();
3018 coro->flags = CF_NEW;
3019
3020 if (coro_first) coro_first->prev = coro;
3021 coro->next = coro_first;
3022 coro_first = coro;
3023
3024 coro->hv = hv = newHV ();
3025 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3026 mg->mg_flags |= MGf_DUP;
3027 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3028
3029 if (argc > 0)
3030 {
3031 av_extend (coro->args, argc + is_coro - 1);
3032
3033 if (is_coro)
3034 {
3035 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3036 cb = (SV *)cv_coro_run;
3037 }
3038
3039 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3040
3041 for (i = 1; i < argc; i++)
3042 av_push (coro->args, newSVsv (argv [i]));
3043 }
3044
3045 return coro_sv;
3046}
3047
858MODULE = Coro::State PACKAGE = Coro::State 3048MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
859 3049
860PROTOTYPES: ENABLE 3050PROTOTYPES: DISABLE
861 3051
862BOOT: 3052BOOT:
863{ /* {} necessary for stoopid perl-5.6.x */ 3053{
864 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3054#ifdef USE_ITHREADS
865 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3055# if CORO_PTHREAD
3056 coro_thx = PERL_GET_CONTEXT;
3057# endif
3058#endif
3059 BOOT_PAGESIZE;
3060
3061 cctx_current = cctx_new_empty ();
3062
3063 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3064 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3065
3066 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3067 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3068 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3069
3070 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3071 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3072 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3073
866 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3074 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
867 3075
868 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3076 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
869 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3077 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
870 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3078 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
871 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3079 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
872
873 if (!padlist_cache)
874 padlist_cache = newHV ();
875 3080
876 main_mainstack = PL_mainstack; 3081 main_mainstack = PL_mainstack;
3082 main_top_env = PL_top_env;
3083
3084 while (main_top_env->je_prev)
3085 main_top_env = main_top_env->je_prev;
877 3086
878 { 3087 {
879 SV *sv = perl_get_sv("Coro::API", 1); 3088 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
880 3089
881 coroapi.ver = CORO_API_VERSION - 1; 3090 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
882 coroapi.transfer = api_transfer; 3091 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
883 coroapi.schedule = api_schedule;
884 coroapi.ready = api_ready;
885 coroapi.nready = &coro_nready;
886 3092
887 GCoroAPI = &coroapi; 3093 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
888 sv_setiv(sv, (IV)&coroapi); 3094 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
889 SvREADONLY_on(sv);
890 } 3095 }
891}
892 3096
893Coro::State 3097 coroapi.ver = CORO_API_VERSION;
894_newprocess(args) 3098 coroapi.rev = CORO_API_REVISION;
895 SV * args 3099
3100 coroapi.transfer = api_transfer;
3101
3102 coroapi.sv_state = SvSTATE_;
3103 coroapi.execute_slf = api_execute_slf;
3104 coroapi.prepare_nop = prepare_nop;
3105 coroapi.prepare_schedule = prepare_schedule;
3106 coroapi.prepare_cede = prepare_cede;
3107 coroapi.prepare_cede_notself = prepare_cede_notself;
3108
3109 {
3110 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3111
3112 if (!svp) croak ("Time::HiRes is required");
3113 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3114
3115 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3116
3117 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3118 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3119 }
3120
3121 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3122}
3123
3124SV *
3125new (SV *klass, ...)
3126 ALIAS:
3127 Coro::new = 1
3128 CODE:
3129 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3130 OUTPUT:
3131 RETVAL
3132
3133void
3134transfer (...)
3135 PROTOTYPE: $$
3136 CODE:
3137 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3138
3139bool
3140_destroy (SV *coro_sv)
3141 CODE:
3142 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3143 OUTPUT:
3144 RETVAL
3145
3146void
3147_exit (int code)
896 PROTOTYPE: $ 3148 PROTOTYPE: $
3149 CODE:
3150 _exit (code);
3151
3152SV *
3153clone (Coro::State coro)
3154 CODE:
3155{
3156#if CORO_CLONE
3157 struct coro *ncoro = coro_clone (aTHX_ coro);
3158 MAGIC *mg;
3159 /* TODO: too much duplication */
3160 ncoro->hv = newHV ();
3161 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3162 mg->mg_flags |= MGf_DUP;
3163 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3164#else
3165 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3166#endif
3167}
3168 OUTPUT:
3169 RETVAL
3170
3171int
3172cctx_stacksize (int new_stacksize = 0)
3173 PROTOTYPE: ;$
3174 CODE:
3175 RETVAL = cctx_stacksize;
3176 if (new_stacksize)
3177 {
3178 cctx_stacksize = new_stacksize;
3179 ++cctx_gen;
3180 }
3181 OUTPUT:
3182 RETVAL
3183
3184int
3185cctx_max_idle (int max_idle = 0)
3186 PROTOTYPE: ;$
3187 CODE:
3188 RETVAL = cctx_max_idle;
3189 if (max_idle > 1)
3190 cctx_max_idle = max_idle;
3191 OUTPUT:
3192 RETVAL
3193
3194int
3195cctx_count ()
3196 PROTOTYPE:
3197 CODE:
3198 RETVAL = cctx_count;
3199 OUTPUT:
3200 RETVAL
3201
3202int
3203cctx_idle ()
3204 PROTOTYPE:
3205 CODE:
3206 RETVAL = cctx_idle;
3207 OUTPUT:
3208 RETVAL
3209
3210void
3211list ()
3212 PROTOTYPE:
3213 PPCODE:
3214{
3215 struct coro *coro;
3216 for (coro = coro_first; coro; coro = coro->next)
3217 if (coro->hv)
3218 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3219}
3220
3221void
3222call (Coro::State coro, SV *coderef)
3223 ALIAS:
3224 eval = 1
3225 CODE:
3226{
3227 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3228 {
3229 struct coro *current = SvSTATE_current;
3230
3231 if (current != coro)
3232 {
3233 PUTBACK;
3234 save_perl (aTHX_ current);
3235 load_perl (aTHX_ coro);
3236 SPAGAIN;
3237 }
3238
3239 PUSHSTACK;
3240
3241 PUSHMARK (SP);
3242 PUTBACK;
3243
3244 if (ix)
3245 eval_sv (coderef, 0);
3246 else
3247 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3248
3249 POPSTACK;
3250 SPAGAIN;
3251
3252 if (current != coro)
3253 {
3254 PUTBACK;
3255 save_perl (aTHX_ coro);
3256 load_perl (aTHX_ current);
3257 SPAGAIN;
3258 }
3259 }
3260}
3261
3262SV *
3263is_ready (Coro::State coro)
3264 PROTOTYPE: $
3265 ALIAS:
3266 is_ready = CF_READY
3267 is_running = CF_RUNNING
3268 is_new = CF_NEW
3269 is_destroyed = CF_DESTROYED
3270 is_suspended = CF_SUSPENDED
3271 CODE:
3272 RETVAL = boolSV (coro->flags & ix);
3273 OUTPUT:
3274 RETVAL
3275
3276void
3277throw (Coro::State self, SV *throw = &PL_sv_undef)
3278 PROTOTYPE: $;$
897 CODE: 3279 CODE:
898 Coro__State coro; 3280{
3281 struct coro *current = SvSTATE_current;
3282 SV **throwp = self == current ? &CORO_THROW : &self->except;
3283 SvREFCNT_dec (*throwp);
3284 SvGETMAGIC (throw);
3285 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3286}
899 3287
900 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3288void
901 croak ("Coro::State::_newprocess expects an arrayref"); 3289api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3290 PROTOTYPE: $;$
3291 C_ARGS: aTHX_ coro, flags
3292
3293SV *
3294has_cctx (Coro::State coro)
3295 PROTOTYPE: $
3296 CODE:
3297 /* maybe manage the running flag differently */
3298 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3299 OUTPUT:
3300 RETVAL
3301
3302int
3303is_traced (Coro::State coro)
3304 PROTOTYPE: $
3305 CODE:
3306 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3307 OUTPUT:
3308 RETVAL
3309
3310UV
3311rss (Coro::State coro)
3312 PROTOTYPE: $
3313 ALIAS:
3314 usecount = 1
3315 CODE:
3316 switch (ix)
3317 {
3318 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3319 case 1: RETVAL = coro->usecount; break;
902 3320 }
903 New (0, coro, 1, struct coro); 3321 OUTPUT:
904
905 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
906 coro->mainstack = 0; /* actual work is done inside transfer */
907 coro->stack = 0;
908
909 RETVAL = coro; 3322 RETVAL
3323
3324void
3325force_cctx ()
3326 PROTOTYPE:
3327 CODE:
3328 cctx_current->idle_sp = 0;
3329
3330void
3331swap_defsv (Coro::State self)
3332 PROTOTYPE: $
3333 ALIAS:
3334 swap_defav = 1
3335 CODE:
3336 if (!self->slot)
3337 croak ("cannot swap state with coroutine that has no saved state,");
3338 else
3339 {
3340 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3341 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3342
3343 SV *tmp = *src; *src = *dst; *dst = tmp;
3344 }
3345
3346void
3347cancel (Coro::State self)
3348 CODE:
3349 coro_state_destroy (aTHX_ self);
3350 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3351
3352
3353SV *
3354enable_times (int enabled = enable_times)
3355 CODE:
3356{
3357 RETVAL = boolSV (enable_times);
3358
3359 if (enabled != enable_times)
3360 {
3361 enable_times = enabled;
3362
3363 coro_times_update ();
3364 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3365 }
3366}
910 OUTPUT: 3367 OUTPUT:
911 RETVAL 3368 RETVAL
912 3369
913void 3370void
914transfer(prev, next, flags) 3371times (Coro::State self)
915 Coro::State_or_hashref prev 3372 PPCODE:
916 Coro::State_or_hashref next 3373{
917 int flags 3374 struct coro *current = SvSTATE (coro_current);
918 PROTOTYPE: @ 3375
3376 if (expect_false (current == self))
3377 {
3378 coro_times_update ();
3379 coro_times_add (SvSTATE (coro_current));
3380 }
3381
3382 EXTEND (SP, 2);
3383 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3384 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3385
3386 if (expect_false (current == self))
3387 coro_times_sub (SvSTATE (coro_current));
3388}
3389
3390void
3391swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3392 CODE:
3393{
3394 struct coro *current = SvSTATE_current;
3395
3396 if (current == coro)
3397 SWAP_SVS (current);
3398
3399 if (!coro->swap_sv)
3400 coro->swap_sv = newAV ();
3401
3402 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3403 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3404
3405 if (current == coro)
3406 SWAP_SVS (current);
3407}
3408
3409
3410MODULE = Coro::State PACKAGE = Coro
3411
3412BOOT:
3413{
3414 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3415 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3416 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3417 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3418 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3419 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3420 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3421 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3422 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3423
3424 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3425 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3426 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3427 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3428
3429 coro_stash = gv_stashpv ("Coro", TRUE);
3430
3431 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3432 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3433 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3434 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3435 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3436 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3437
3438 {
3439 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3440
3441 coroapi.schedule = api_schedule;
3442 coroapi.schedule_to = api_schedule_to;
3443 coroapi.cede = api_cede;
3444 coroapi.cede_notself = api_cede_notself;
3445 coroapi.ready = api_ready;
3446 coroapi.is_ready = api_is_ready;
3447 coroapi.nready = coro_nready;
3448 coroapi.current = coro_current;
3449
3450 /*GCoroAPI = &coroapi;*/
3451 sv_setiv (sv, (IV)&coroapi);
3452 SvREADONLY_on (sv);
3453 }
3454}
3455
3456SV *
3457async (...)
3458 PROTOTYPE: &@
919 CODE: 3459 CODE:
920 PUTBACK; 3460 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
921 transfer (aTHX_ prev, next, flags); 3461 api_ready (aTHX_ RETVAL);
922 SPAGAIN; 3462 OUTPUT:
3463 RETVAL
923 3464
924void 3465void
925DESTROY(coro) 3466terminate (...)
926 Coro::State coro 3467 CODE:
927 CODE: 3468 CORO_EXECUTE_SLF_XS (slf_init_terminate);
928
929 if (coro->mainstack && coro->mainstack != main_mainstack)
930 {
931 struct coro temp;
932
933 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
934 LOAD(aTHX_ coro);
935
936 destroy_stacks (aTHX);
937
938 LOAD((&temp)); /* this will get rid of defsv etc.. */
939
940 coro->mainstack = 0;
941 }
942
943 deallocate_stack (coro);
944
945 Safefree (coro);
946 3469
947void 3470void
948flush() 3471schedule (...)
949 CODE: 3472 CODE:
950#ifdef MAY_FLUSH 3473 CORO_EXECUTE_SLF_XS (slf_init_schedule);
951 flush_padlist_cache ();
952#endif
953 3474
954void 3475void
955_exit(code) 3476schedule_to (...)
956 int code 3477 CODE:
3478 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3479
3480void
3481cede_to (...)
3482 CODE:
3483 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3484
3485void
3486cede (...)
3487 CODE:
3488 CORO_EXECUTE_SLF_XS (slf_init_cede);
3489
3490void
3491cede_notself (...)
3492 CODE:
3493 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3494
3495void
3496_set_current (SV *current)
957 PROTOTYPE: $ 3497 PROTOTYPE: $
958 CODE: 3498 CODE:
959#if defined(__GLIBC__) || _POSIX_C_SOURCE 3499 SvREFCNT_dec (SvRV (coro_current));
960 _exit (code); 3500 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
961#else
962 signal (SIGTERM, SIG_DFL);
963 raise (SIGTERM);
964 exit (code);
965#endif
966
967MODULE = Coro::State PACKAGE = Coro::Cont
968
969# this is slightly dirty (should expose a c-level api)
970 3501
971void 3502void
972yield(...) 3503_set_readyhook (SV *hook)
973 PROTOTYPE: @ 3504 PROTOTYPE: $
974 CODE: 3505 CODE:
975 static SV *returnstk;
976 SV *sv;
977 AV *defav = GvAV (PL_defgv);
978 struct coro *prev, *next;
979
980 if (!returnstk)
981 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
982
983 /* set up @_ -- ugly */
984 av_clear (defav);
985 av_fill (defav, items - 1);
986 while (items--)
987 av_store (defav, items, SvREFCNT_inc (ST(items)));
988
989 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
990 sv = av_pop ((AV *)SvRV (returnstk));
991 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
992 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
993 SvREFCNT_dec (sv); 3506 SvREFCNT_dec (coro_readyhook);
994 3507 SvGETMAGIC (hook);
995 transfer(aTHX_ prev, next, 0); 3508 if (SvOK (hook))
996 3509 {
997MODULE = Coro::State PACKAGE = Coro
998
999# this is slightly dirty (should expose a c-level api)
1000
1001BOOT:
1002{
1003 int i;
1004 HV *stash = gv_stashpv ("Coro", TRUE);
1005
1006 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1007 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1008 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1009 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1010 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1011 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1012
1013 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1014 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1015
1016 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1017 coro_ready[i] = newAV (); 3510 coro_readyhook = newSVsv (hook);
1018} 3511 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3512 }
3513 else
3514 {
3515 coro_readyhook = 0;
3516 CORO_READYHOOK = 0;
3517 }
1019 3518
1020void 3519int
3520prio (Coro::State coro, int newprio = 0)
3521 PROTOTYPE: $;$
3522 ALIAS:
3523 nice = 1
3524 CODE:
3525{
3526 RETVAL = coro->prio;
3527
3528 if (items > 1)
3529 {
3530 if (ix)
3531 newprio = coro->prio - newprio;
3532
3533 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3534 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3535
3536 coro->prio = newprio;
3537 }
3538}
3539 OUTPUT:
3540 RETVAL
3541
3542SV *
1021ready(self) 3543ready (SV *self)
1022 SV * self 3544 PROTOTYPE: $
1023 CODE: 3545 CODE:
1024 api_ready (self); 3546 RETVAL = boolSV (api_ready (aTHX_ self));
3547 OUTPUT:
3548 RETVAL
1025 3549
1026int 3550int
1027nready(...) 3551nready (...)
1028 PROTOTYPE: 3552 PROTOTYPE:
1029 CODE: 3553 CODE:
1030 RETVAL = coro_nready; 3554 RETVAL = coro_nready;
1031 OUTPUT: 3555 OUTPUT:
1032 RETVAL 3556 RETVAL
1033 3557
1034void 3558void
1035schedule(...) 3559suspend (Coro::State self)
1036 PROTOTYPE: 3560 PROTOTYPE: $
1037 ALIAS:
1038 cede = 1
1039 CODE: 3561 CODE:
1040 api_schedule (ix); 3562 self->flags |= CF_SUSPENDED;
1041 3563
3564void
3565resume (Coro::State self)
3566 PROTOTYPE: $
3567 CODE:
3568 self->flags &= ~CF_SUSPENDED;
3569
3570void
3571_pool_handler (...)
3572 CODE:
3573 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3574
3575void
3576async_pool (SV *cv, ...)
3577 PROTOTYPE: &@
3578 PPCODE:
3579{
3580 HV *hv = (HV *)av_pop (av_async_pool);
3581 AV *av = newAV ();
3582 SV *cb = ST (0);
3583 int i;
3584
3585 av_extend (av, items - 2);
3586 for (i = 1; i < items; ++i)
3587 av_push (av, SvREFCNT_inc_NN (ST (i)));
3588
3589 if ((SV *)hv == &PL_sv_undef)
3590 {
3591 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3592 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3593 SvREFCNT_dec (sv);
3594 }
3595
3596 {
3597 struct coro *coro = SvSTATE_hv (hv);
3598
3599 assert (!coro->invoke_cb);
3600 assert (!coro->invoke_av);
3601 coro->invoke_cb = SvREFCNT_inc (cb);
3602 coro->invoke_av = av;
3603 }
3604
3605 api_ready (aTHX_ (SV *)hv);
3606
3607 if (GIMME_V != G_VOID)
3608 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3609 else
3610 SvREFCNT_dec (hv);
3611}
3612
3613SV *
3614rouse_cb ()
3615 PROTOTYPE:
3616 CODE:
3617 RETVAL = coro_new_rouse_cb (aTHX);
3618 OUTPUT:
3619 RETVAL
3620
3621void
3622rouse_wait (...)
3623 PROTOTYPE: ;$
3624 PPCODE:
3625 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3626
3627void
3628on_enter (SV *block)
3629 ALIAS:
3630 on_leave = 1
3631 PROTOTYPE: &
3632 CODE:
3633{
3634 struct coro *coro = SvSTATE_current;
3635 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3636
3637 block = s_get_cv_croak (block);
3638
3639 if (!*avp)
3640 *avp = newAV ();
3641
3642 av_push (*avp, SvREFCNT_inc (block));
3643
3644 if (!ix)
3645 on_enterleave_call (aTHX_ block);
3646
3647 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3648 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3649 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3650}
3651
3652
3653MODULE = Coro::State PACKAGE = PerlIO::cede
3654
3655BOOT:
3656 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3657
3658
3659MODULE = Coro::State PACKAGE = Coro::Semaphore
3660
3661SV *
3662new (SV *klass, SV *count = 0)
3663 CODE:
3664{
3665 int semcnt = 1;
3666
3667 if (count)
3668 {
3669 SvGETMAGIC (count);
3670
3671 if (SvOK (count))
3672 semcnt = SvIV (count);
3673 }
3674
3675 RETVAL = sv_bless (
3676 coro_waitarray_new (aTHX_ semcnt),
3677 GvSTASH (CvGV (cv))
3678 );
3679}
3680 OUTPUT:
3681 RETVAL
3682
3683# helper for Coro::Channel and others
3684SV *
3685_alloc (int count)
3686 CODE:
3687 RETVAL = coro_waitarray_new (aTHX_ count);
3688 OUTPUT:
3689 RETVAL
3690
3691SV *
3692count (SV *self)
3693 CODE:
3694 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3695 OUTPUT:
3696 RETVAL
3697
3698void
3699up (SV *self, int adjust = 1)
3700 ALIAS:
3701 adjust = 1
3702 CODE:
3703 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3704
3705void
3706down (...)
3707 CODE:
3708 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3709
3710void
3711wait (...)
3712 CODE:
3713 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3714
3715void
3716try (SV *self)
3717 PPCODE:
3718{
3719 AV *av = (AV *)SvRV (self);
3720 SV *count_sv = AvARRAY (av)[0];
3721 IV count = SvIVX (count_sv);
3722
3723 if (count > 0)
3724 {
3725 --count;
3726 SvIVX (count_sv) = count;
3727 XSRETURN_YES;
3728 }
3729 else
3730 XSRETURN_NO;
3731}
3732
3733void
3734waiters (SV *self)
3735 PPCODE:
3736{
3737 AV *av = (AV *)SvRV (self);
3738 int wcount = AvFILLp (av) + 1 - 1;
3739
3740 if (GIMME_V == G_SCALAR)
3741 XPUSHs (sv_2mortal (newSViv (wcount)));
3742 else
3743 {
3744 int i;
3745 EXTEND (SP, wcount);
3746 for (i = 1; i <= wcount; ++i)
3747 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3748 }
3749}
3750
3751MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3752
3753void
3754_may_delete (SV *sem, int count, int extra_refs)
3755 PPCODE:
3756{
3757 AV *av = (AV *)SvRV (sem);
3758
3759 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3760 && AvFILLp (av) == 0 /* no waiters, just count */
3761 && SvIV (AvARRAY (av)[0]) == count)
3762 XSRETURN_YES;
3763
3764 XSRETURN_NO;
3765}
3766
3767MODULE = Coro::State PACKAGE = Coro::Signal
3768
3769SV *
3770new (SV *klass)
3771 CODE:
3772 RETVAL = sv_bless (
3773 coro_waitarray_new (aTHX_ 0),
3774 GvSTASH (CvGV (cv))
3775 );
3776 OUTPUT:
3777 RETVAL
3778
3779void
3780wait (...)
3781 CODE:
3782 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3783
3784void
3785broadcast (SV *self)
3786 CODE:
3787{
3788 AV *av = (AV *)SvRV (self);
3789 coro_signal_wake (aTHX_ av, AvFILLp (av));
3790}
3791
3792void
3793send (SV *self)
3794 CODE:
3795{
3796 AV *av = (AV *)SvRV (self);
3797
3798 if (AvFILLp (av))
3799 coro_signal_wake (aTHX_ av, 1);
3800 else
3801 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3802}
3803
3804IV
3805awaited (SV *self)
3806 CODE:
3807 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3808 OUTPUT:
3809 RETVAL
3810
3811
3812MODULE = Coro::State PACKAGE = Coro::AnyEvent
3813
3814BOOT:
3815 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3816
3817void
3818_schedule (...)
3819 CODE:
3820{
3821 static int incede;
3822
3823 api_cede_notself (aTHX);
3824
3825 ++incede;
3826 while (coro_nready >= incede && api_cede (aTHX))
3827 ;
3828
3829 sv_setsv (sv_activity, &PL_sv_undef);
3830 if (coro_nready >= incede)
3831 {
3832 PUSHMARK (SP);
3833 PUTBACK;
3834 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3835 }
3836
3837 --incede;
3838}
3839
3840
3841MODULE = Coro::State PACKAGE = Coro::AIO
3842
3843void
3844_register (char *target, char *proto, SV *req)
3845 CODE:
3846{
3847 SV *req_cv = s_get_cv_croak (req);
3848 /* newXSproto doesn't return the CV on 5.8 */
3849 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3850 sv_setpv ((SV *)slf_cv, proto);
3851 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3852}
3853
3854MODULE = Coro::State PACKAGE = Coro::Select
3855
3856void
3857patch_pp_sselect ()
3858 CODE:
3859 if (!coro_old_pp_sselect)
3860 {
3861 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3862 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3863 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3864 }
3865
3866void
3867unpatch_pp_sselect ()
3868 CODE:
3869 if (coro_old_pp_sselect)
3870 {
3871 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3872 coro_old_pp_sselect = 0;
3873 }
3874
3875

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