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Comparing Coro/Coro/State.xs (file contents):
Revision 1.44 by root, Sat Mar 22 18:50:32 2003 UTC vs.
Revision 1.372 by root, Thu Oct 1 23:50:23 2009 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "schmorp.h"
6 12
7#include <signal.h> 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp /* deep magic */
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
… …
14# define MAP_ANONYMOUS MAP_ANON 31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
19#endif 47#endif
20 48
21#define MAY_FLUSH /* increases codesize and is rarely used */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51#endif
22 52
23#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 54static int cctx_max_idle = 4;
25 55
26/* The next macro should declare a variable stacklevel that contains and approximation 56#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 57# undef CORO_STACKGUARD
28 * and should be unique. */ 58#endif
59
60#ifndef CORO_STACKGUARD
61# define CORO_STACKGUARD 0
62#endif
63
64/* prefer perl internal functions over our own? */
65#ifndef CORO_PREFER_PERL_FUNCTIONS
66# define CORO_PREFER_PERL_FUNCTIONS 0
67#endif
68
69/* The next macros try to return the current stack pointer, in an as
70 * portable way as possible. */
71#if __GNUC__ >= 4
72# define dSTACKLEVEL int stacklevel_dummy
73# define STACKLEVEL __builtin_frame_address (0)
74#else
75# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 76# define STACKLEVEL ((void *)&stacklevel)
77#endif
30 78
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 79#define IN_DESTRUCT PL_dirty
32 80
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 81#if __GNUC__ >= 3
82# define attribute(x) __attribute__(x)
83# define expect(expr,value) __builtin_expect ((expr), (value))
84# define INLINE static inline
85#else
86# define attribute(x)
87# define expect(expr,value) (expr)
88# define INLINE static
89#endif
90
91#define expect_false(expr) expect ((expr) != 0, 0)
92#define expect_true(expr) expect ((expr) != 0, 1)
93
94#define NOINLINE attribute ((noinline))
34 95
35#include "CoroAPI.h" 96#include "CoroAPI.h"
97#define GCoroAPI (&coroapi) /* very sneaky */
36 98
99#ifdef USE_ITHREADS
100# if CORO_PTHREAD
101static void *coro_thx;
102# endif
103#endif
104
105#ifdef __linux
106# include <time.h> /* for timespec */
107# include <syscall.h> /* for SYS_* */
108# ifdef SYS_clock_gettime
109# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
110# define CORO_CLOCK_MONOTONIC 1
111# define CORO_CLOCK_THREAD_CPUTIME_ID 3
112# endif
113#endif
114
115static double (*nvtime)(); /* so why doesn't it take void? */
116static void (*u2time)(pTHX_ UV ret[2]);
117
118/* we hijack an hopefully unused CV flag for our purposes */
119#define CVf_SLF 0x4000
120static OP *pp_slf (pTHX);
121
122static U32 cctx_gen;
123static size_t cctx_stacksize = CORO_STACKSIZE;
37static struct CoroAPI coroapi; 124static struct CoroAPI coroapi;
125static AV *main_mainstack; /* used to differentiate between $main and others */
126static JMPENV *main_top_env;
127static HV *coro_state_stash, *coro_stash;
128static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
38 129
39/* this is actually not only the c stack but also c registers etc... */ 130static AV *av_destroy; /* destruction queue */
131static SV *sv_manager; /* the manager coro */
132static SV *sv_idle; /* $Coro::idle */
133
134static GV *irsgv; /* $/ */
135static GV *stdoutgv; /* *STDOUT */
136static SV *rv_diehook;
137static SV *rv_warnhook;
138static HV *hv_sig; /* %SIG */
139
140/* async_pool helper stuff */
141static SV *sv_pool_rss;
142static SV *sv_pool_size;
143static SV *sv_async_pool_idle; /* description string */
144static AV *av_async_pool; /* idle pool */
145static SV *sv_Coro; /* class string */
146static CV *cv_pool_handler;
147
148/* Coro::AnyEvent */
149static SV *sv_activity;
150
151/* enable processtime/realtime profiling */
152static char enable_times;
153typedef U32 coro_ts[2];
154static coro_ts time_real, time_cpu;
155static char times_valid;
156
157static struct coro_cctx *cctx_first;
158static int cctx_count, cctx_idle;
159
160enum {
161 CC_MAPPED = 0x01,
162 CC_NOREUSE = 0x02, /* throw this away after tracing */
163 CC_TRACE = 0x04,
164 CC_TRACE_SUB = 0x08, /* trace sub calls */
165 CC_TRACE_LINE = 0x10, /* trace each statement */
166 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
167};
168
169/* this is a structure representing a c-level coroutine */
40typedef struct { 170typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 171{
42 int usecnt; /* shared by how many coroutines */ 172 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 173
174 /* the stack */
175 void *sptr;
176 size_t ssize;
177
178 /* cpu state */
179 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
180 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
181 JMPENV *top_env;
45 coro_context cctx; 182 coro_context cctx;
46 183
47 void *sptr; 184 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 185#if CORO_USE_VALGRIND
49} coro_stack; 186 int valgrind_id;
187#endif
188 unsigned char flags;
189} coro_cctx;
50 190
191coro_cctx *cctx_current; /* the currently running cctx */
192
193/*****************************************************************************/
194
195enum {
196 CF_RUNNING = 0x0001, /* coroutine is running */
197 CF_READY = 0x0002, /* coroutine is ready */
198 CF_NEW = 0x0004, /* has never been switched to */
199 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
200 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
201};
202
203/* the structure where most of the perl state is stored, overlaid on the cxstack */
204typedef struct
205{
206 SV *defsv;
207 AV *defav;
208 SV *errsv;
209 SV *irsgv;
210 HV *hinthv;
211#define VAR(name,type) type name;
212# include "state.h"
213#undef VAR
214} perl_slots;
215
216#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
217
218/* this is a structure representing a perl-level coroutine */
51struct coro { 219struct coro {
52 /* the optional C context */ 220 /* the C coroutine allocated to this perl coroutine, if any */
53 coro_stack *stack; 221 coro_cctx *cctx;
54 void *cursp;
55 int gencnt;
56 222
57 /* optionally saved, might be zero */ 223 /* ready queue */
58 AV *defav; 224 struct coro *next_ready;
59 SV *defsv;
60 SV *errsv;
61
62 /* saved global state not related to stacks */
63 U8 dowarn;
64 I32 in_eval;
65 225
66 /* the stacks and related info (callchain etc..) */ 226 /* state data */
67 PERL_SI *curstackinfo; 227 struct CoroSLF slf_frame; /* saved slf frame */
68 AV *curstack;
69 AV *mainstack; 228 AV *mainstack;
70 SV **stack_sp; 229 perl_slots *slot; /* basically the saved sp */
71 OP *op;
72 SV **curpad;
73 AV *comppad;
74 SV **stack_base;
75 SV **stack_max;
76 SV **tmps_stack;
77 I32 tmps_floor;
78 I32 tmps_ix;
79 I32 tmps_max;
80 I32 *markstack;
81 I32 *markstack_ptr;
82 I32 *markstack_max;
83 I32 *scopestack;
84 I32 scopestack_ix;
85 I32 scopestack_max;
86 ANY *savestack;
87 I32 savestack_ix;
88 I32 savestack_max;
89 OP **retstack;
90 I32 retstack_ix;
91 I32 retstack_max;
92 COP *curcop;
93 JMPENV *top_env;
94 230
231 CV *startcv; /* the CV to execute */
95 /* data associated with this coroutine (initial args) */ 232 AV *args; /* data associated with this coroutine (initial args) */
96 AV *args; 233 int refcnt; /* coroutines are refcounted, yes */
234 int flags; /* CF_ flags */
235 HV *hv; /* the perl hash associated with this coro, if any */
236 void (*on_destroy)(pTHX_ struct coro *coro);
237
238 /* statistics */
239 int usecount; /* number of transfers to this coro */
240
241 /* coro process data */
242 int prio;
243 SV *except; /* exception to be thrown */
244 SV *rouse_cb;
245
246 /* async_pool */
247 SV *saved_deffh;
248 SV *invoke_cb;
249 AV *invoke_av;
250
251 /* on_enter/on_leave */
252 AV *on_enter;
253 AV *on_leave;
254
255 /* times */
256 coro_ts t_cpu, t_real;
257
258 /* linked list */
259 struct coro *next, *prev;
97}; 260};
98 261
99typedef struct coro *Coro__State; 262typedef struct coro *Coro__State;
100typedef struct coro *Coro__State_or_hashref; 263typedef struct coro *Coro__State_or_hashref;
101 264
102static AV *main_mainstack; /* used to differentiate between $main and others */ 265/* the following variables are effectively part of the perl context */
103static HV *coro_state_stash; 266/* and get copied between struct coro and these variables */
267/* the mainr easonw e don't support windows process emulation */
268static struct CoroSLF slf_frame; /* the current slf frame */
269
270/** Coro ********************************************************************/
271
272#define CORO_PRIO_MAX 3
273#define CORO_PRIO_HIGH 1
274#define CORO_PRIO_NORMAL 0
275#define CORO_PRIO_LOW -1
276#define CORO_PRIO_IDLE -3
277#define CORO_PRIO_MIN -4
278
279/* for Coro.pm */
280static SV *coro_current;
281static SV *coro_readyhook;
282static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
283static CV *cv_coro_run, *cv_coro_terminate;
284static struct coro *coro_first;
285#define coro_nready coroapi.nready
286
287/** Coro::Select ************************************************************/
288
289static OP *(*coro_old_pp_sselect) (pTHX);
104static SV *ucoro_state_sv; 290static SV *coro_select_select;
105static U32 ucoro_state_hash;
106static HV *padlist_cache;
107static SV *coro_mortal; /* will be freed after next transfer */
108 291
109/* mostly copied from op.c:cv_clone2 */ 292/* horrible hack, but if it works... */
110STATIC AV * 293static OP *
111clone_padlist (AV *protopadlist) 294coro_pp_sselect (pTHX)
112{ 295{
113 AV *av; 296 dSP;
114 I32 ix; 297 PUSHMARK (SP - 4); /* fake argument list */
115 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 298 XPUSHs (coro_select_select);
116 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 299 PUTBACK;
117 SV **pname = AvARRAY (protopad_name); 300
118 SV **ppad = AvARRAY (protopad); 301 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
119 I32 fname = AvFILLp (protopad_name); 302 PL_op->op_flags |= OPf_STACKED;
120 I32 fpad = AvFILLp (protopad); 303 PL_op->op_private = 0;
304 return PL_ppaddr [OP_ENTERSUB](aTHX);
305}
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
311{
312#if PERL_VERSION_ATLEAST (5,10,0)
313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
314 get_sv (name, create);
315#endif
316 return get_sv (name, create);
317}
318
319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339INLINE void
340coro_times_update ()
341{
342#ifdef coro_clock_gettime
343 struct timespec ts;
344
345 ts.tv_sec = ts.tv_nsec = 0;
346 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
347 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
348
349 ts.tv_sec = ts.tv_nsec = 0;
350 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
351 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
352#else
353 dTHX;
354 UV tv[2];
355
356 u2time (aTHX_ tv);
357 time_real [0] = tv [0];
358 time_real [1] = tv [1] * 1000;
359#endif
360}
361
362INLINE void
363coro_times_add (struct coro *c)
364{
365 c->t_real [1] += time_real [1];
366 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
367 c->t_real [0] += time_real [0];
368
369 c->t_cpu [1] += time_cpu [1];
370 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
371 c->t_cpu [0] += time_cpu [0];
372}
373
374INLINE void
375coro_times_sub (struct coro *c)
376{
377 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
378 c->t_real [1] -= time_real [1];
379 c->t_real [0] -= time_real [0];
380
381 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
382 c->t_cpu [1] -= time_cpu [1];
383 c->t_cpu [0] -= time_cpu [0];
384}
385
386/*****************************************************************************/
387/* magic glue */
388
389#define CORO_MAGIC_type_cv 26
390#define CORO_MAGIC_type_state PERL_MAGIC_ext
391
392#define CORO_MAGIC_NN(sv, type) \
393 (expect_true (SvMAGIC (sv)->mg_type == type) \
394 ? SvMAGIC (sv) \
395 : mg_find (sv, type))
396
397#define CORO_MAGIC(sv, type) \
398 (expect_true (SvMAGIC (sv)) \
399 ? CORO_MAGIC_NN (sv, type) \
400 : 0)
401
402#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
403#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
404
405INLINE struct coro *
406SvSTATE_ (pTHX_ SV *coro)
407{
408 HV *stash;
409 MAGIC *mg;
410
411 if (SvROK (coro))
412 coro = SvRV (coro);
413
414 if (expect_false (SvTYPE (coro) != SVt_PVHV))
415 croak ("Coro::State object required");
416
417 stash = SvSTASH (coro);
418 if (expect_false (stash != coro_stash && stash != coro_state_stash))
419 {
420 /* very slow, but rare, check */
421 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
422 croak ("Coro::State object required");
423 }
424
425 mg = CORO_MAGIC_state (coro);
426 return (struct coro *)mg->mg_ptr;
427}
428
429#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
430
431/* faster than SvSTATE, but expects a coroutine hv */
432#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
433#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
434
435/*****************************************************************************/
436/* padlist management and caching */
437
438static AV *
439coro_derive_padlist (pTHX_ CV *cv)
440{
441 AV *padlist = CvPADLIST (cv);
121 AV *newpadlist, *newpad_name, *newpad; 442 AV *newpadlist, *newpad;
122 SV **npad;
123
124 newpad_name = newAV ();
125 for (ix = fname; ix >= 0; ix--)
126 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128 newpad = newAV ();
129 av_fill (newpad, AvFILLp (protopad));
130 npad = AvARRAY (newpad);
131 443
132 newpadlist = newAV (); 444 newpadlist = newAV ();
133 AvREAL_off (newpadlist); 445 AvREAL_off (newpadlist);
134 av_store (newpadlist, 0, (SV *) newpad_name); 446#if PERL_VERSION_ATLEAST (5,10,0)
447 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
448#else
449 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
450#endif
451 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
452 --AvFILLp (padlist);
453
454 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
135 av_store (newpadlist, 1, (SV *) newpad); 455 av_store (newpadlist, 1, (SV *)newpad);
136 456
137 av = newAV (); /* will be @_ */ 457 return newpadlist;
138 av_extend (av, 0); 458}
139 av_store (newpad, 0, (SV *) av);
140 AvFLAGS (av) = AVf_REIFY;
141 459
142 for (ix = fpad; ix > 0; ix--) 460static void
461free_padlist (pTHX_ AV *padlist)
462{
463 /* may be during global destruction */
464 if (!IN_DESTRUCT)
143 { 465 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 466 I32 i = AvFILLp (padlist);
145 if (namesv && namesv != &PL_sv_undef) 467
468 while (i > 0) /* special-case index 0 */
146 { 469 {
147 char *name = SvPVX (namesv); /* XXX */ 470 /* we try to be extra-careful here */
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 471 AV *av = (AV *)AvARRAY (padlist)[i--];
149 { /* lexical from outside? */ 472 I32 j = AvFILLp (av);
150 npad[ix] = SvREFCNT_inc (ppad[ix]); 473
151 } 474 while (j >= 0)
152 else 475 SvREFCNT_dec (AvARRAY (av)[j--]);
153 { /* our own lexical */ 476
154 SV *sv; 477 AvFILLp (av) = -1;
155 if (*name == '&') 478 SvREFCNT_dec (av);
156 sv = SvREFCNT_inc (ppad[ix]);
157 else if (*name == '@')
158 sv = (SV *) newAV ();
159 else if (*name == '%')
160 sv = (SV *) newHV ();
161 else
162 sv = NEWSV (0, 0);
163 if (!SvPADBUSY (sv))
164 SvPADMY_on (sv);
165 npad[ix] = sv;
166 }
167 } 479 }
168 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 480
169 { 481 SvREFCNT_dec (AvARRAY (padlist)[0]);
170 npad[ix] = SvREFCNT_inc (ppad[ix]); 482
171 } 483 AvFILLp (padlist) = -1;
484 SvREFCNT_dec ((SV*)padlist);
485 }
486}
487
488static int
489coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
490{
491 AV *padlist;
492 AV *av = (AV *)mg->mg_obj;
493
494 /* perl manages to free our internal AV and _then_ call us */
495 if (IN_DESTRUCT)
496 return 0;
497
498 /* casting is fun. */
499 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
500 free_padlist (aTHX_ padlist);
501
502 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
503
504 return 0;
505}
506
507static MGVTBL coro_cv_vtbl = {
508 0, 0, 0, 0,
509 coro_cv_free
510};
511
512/* the next two functions merely cache the padlists */
513static void
514get_padlist (pTHX_ CV *cv)
515{
516 MAGIC *mg = CORO_MAGIC_cv (cv);
517 AV *av;
518
519 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
520 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
172 else 521 else
173 { 522 {
174 SV *sv = NEWSV (0, 0); 523#if CORO_PREFER_PERL_FUNCTIONS
175 SvPADTMP_on (sv); 524 /* this is probably cleaner? but also slower! */
176 npad[ix] = sv; 525 /* in practise, it seems to be less stable */
177 } 526 CV *cp = Perl_cv_clone (aTHX_ cv);
178 } 527 CvPADLIST (cv) = CvPADLIST (cp);
179 528 CvPADLIST (cp) = 0;
180#if 0 /* return -ENOTUNDERSTOOD */ 529 SvREFCNT_dec (cp);
181 /* Now that vars are all in place, clone nested closures. */ 530#else
182 531 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
183 for (ix = fpad; ix > 0; ix--) {
184 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185 if (namesv
186 && namesv != &PL_sv_undef
187 && !(SvFLAGS(namesv) & SVf_FAKE)
188 && *SvPVX(namesv) == '&'
189 && CvCLONE(ppad[ix]))
190 {
191 CV *kid = cv_clone((CV*)ppad[ix]);
192 SvREFCNT_dec(ppad[ix]);
193 CvCLONE_on(kid);
194 SvPADMY_on(kid);
195 npad[ix] = (SV*)kid;
196 }
197 }
198#endif 532#endif
199
200 return newpadlist;
201}
202
203#ifdef MAY_FLUSH
204STATIC void
205free_padlist (AV *padlist)
206{
207 /* may be during global destruction */
208 if (SvREFCNT(padlist))
209 {
210 I32 i = AvFILLp(padlist);
211 while (i >= 0)
212 {
213 SV **svp = av_fetch(padlist, i--, FALSE);
214 SV *sv = svp ? *svp : Nullsv;
215 if (sv)
216 SvREFCNT_dec(sv);
217 }
218
219 SvREFCNT_dec((SV*)padlist);
220 }
221}
222#endif
223
224/* the next two functions merely cache the padlists */
225STATIC void
226get_padlist (CV *cv)
227{
228 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
229
230 if (he && AvFILLp ((AV *)*he) >= 0)
231 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
232 else
233 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234}
235
236STATIC void
237put_padlist (CV *cv)
238{
239 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241 if (SvTYPE (*he) != SVt_PVAV)
242 {
243 SvREFCNT_dec (*he);
244 *he = (SV *)newAV ();
245 } 533 }
246
247 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248} 534}
249 535
250#ifdef MAY_FLUSH
251STATIC void
252flush_padlist_cache ()
253{
254 HV *hv = padlist_cache;
255 padlist_cache = newHV ();
256
257 if (hv_iterinit (hv))
258 {
259 HE *he;
260 AV *padlist;
261
262 while (!!(he = hv_iternext (hv)))
263 {
264 AV *av = (AV *)HeVAL(he);
265
266 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (padlist);
269 }
270 }
271
272 SvREFCNT_dec (hv);
273}
274#endif
275
276#define SB do {
277#define SE } while (0)
278
279#define LOAD(state) load_state(aTHX_ (state));
280#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281
282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
283
284static void 536static void
537put_padlist (pTHX_ CV *cv)
538{
539 MAGIC *mg = CORO_MAGIC_cv (cv);
540 AV *av;
541
542 if (expect_false (!mg))
543 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
544
545 av = (AV *)mg->mg_obj;
546
547 if (expect_false (AvFILLp (av) >= AvMAX (av)))
548 av_extend (av, AvFILLp (av) + 1);
549
550 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
551}
552
553/** load & save, init *******************************************************/
554
555static void
556on_enterleave_call (pTHX_ SV *cb);
557
558static void
285load_state(pTHX_ Coro__State c) 559load_perl (pTHX_ Coro__State c)
286{ 560{
287 PL_dowarn = c->dowarn; 561 perl_slots *slot = c->slot;
288 PL_in_eval = c->in_eval; 562 c->slot = 0;
289 563
290 PL_curstackinfo = c->curstackinfo;
291 PL_curstack = c->curstack;
292 PL_mainstack = c->mainstack; 564 PL_mainstack = c->mainstack;
293 PL_stack_sp = c->stack_sp;
294 PL_op = c->op;
295 PL_curpad = c->curpad;
296 PL_comppad = c->comppad;
297 PL_stack_base = c->stack_base;
298 PL_stack_max = c->stack_max;
299 PL_tmps_stack = c->tmps_stack;
300 PL_tmps_floor = c->tmps_floor;
301 PL_tmps_ix = c->tmps_ix;
302 PL_tmps_max = c->tmps_max;
303 PL_markstack = c->markstack;
304 PL_markstack_ptr = c->markstack_ptr;
305 PL_markstack_max = c->markstack_max;
306 PL_scopestack = c->scopestack;
307 PL_scopestack_ix = c->scopestack_ix;
308 PL_scopestack_max = c->scopestack_max;
309 PL_savestack = c->savestack;
310 PL_savestack_ix = c->savestack_ix;
311 PL_savestack_max = c->savestack_max;
312 PL_retstack = c->retstack;
313 PL_retstack_ix = c->retstack_ix;
314 PL_retstack_max = c->retstack_max;
315 PL_curcop = c->curcop;
316 PL_top_env = c->top_env;
317 565
318 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 566 GvSV (PL_defgv) = slot->defsv;
319 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 567 GvAV (PL_defgv) = slot->defav;
320 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 568 GvSV (PL_errgv) = slot->errsv;
569 GvSV (irsgv) = slot->irsgv;
570 GvHV (PL_hintgv) = slot->hinthv;
571
572 #define VAR(name,type) PL_ ## name = slot->name;
573 # include "state.h"
574 #undef VAR
321 575
322 { 576 {
323 dSP; 577 dSP;
578
324 CV *cv; 579 CV *cv;
325 580
326 /* now do the ugly restore mess */ 581 /* now do the ugly restore mess */
327 while ((cv = (CV *)POPs)) 582 while (expect_true (cv = (CV *)POPs))
328 { 583 {
329 AV *padlist = (AV *)POPs;
330
331 if (padlist)
332 {
333 put_padlist (cv); /* mark this padlist as available */ 584 put_padlist (aTHX_ cv); /* mark this padlist as available */
334 CvPADLIST(cv) = padlist; 585 CvDEPTH (cv) = PTR2IV (POPs);
335#ifdef USE_THREADS 586 CvPADLIST (cv) = (AV *)POPs;
336 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
337#endif
338 }
339
340 ++CvDEPTH(cv);
341 } 587 }
342 588
343 PUTBACK; 589 PUTBACK;
344 } 590 }
345}
346 591
592 slf_frame = c->slf_frame;
593 CORO_THROW = c->except;
594
595 if (expect_false (enable_times))
596 {
597 if (expect_false (!times_valid))
598 coro_times_update ();
599
600 coro_times_sub (c);
601 }
602
603 if (expect_false (c->on_enter))
604 {
605 int i;
606
607 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
608 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
609 }
610}
611
347static void 612static void
348save_state(pTHX_ Coro__State c, int flags) 613save_perl (pTHX_ Coro__State c)
349{ 614{
615 if (expect_false (c->on_leave))
616 {
617 int i;
618
619 for (i = AvFILLp (c->on_leave); i >= 0; --i)
620 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
621 }
622
623 times_valid = 0;
624
625 if (expect_false (enable_times))
626 {
627 coro_times_update (); times_valid = 1;
628 coro_times_add (c);
629 }
630
631 c->except = CORO_THROW;
632 c->slf_frame = slf_frame;
633
350 { 634 {
351 dSP; 635 dSP;
352 I32 cxix = cxstack_ix; 636 I32 cxix = cxstack_ix;
353 PERL_CONTEXT *ccstk = cxstack; 637 PERL_CONTEXT *ccstk = cxstack;
354 PERL_SI *top_si = PL_curstackinfo; 638 PERL_SI *top_si = PL_curstackinfo;
… …
356 /* 640 /*
357 * the worst thing you can imagine happens first - we have to save 641 * the worst thing you can imagine happens first - we have to save
358 * (and reinitialize) all cv's in the whole callchain :( 642 * (and reinitialize) all cv's in the whole callchain :(
359 */ 643 */
360 644
361 PUSHs (Nullsv); 645 XPUSHs (Nullsv);
362 /* this loop was inspired by pp_caller */ 646 /* this loop was inspired by pp_caller */
363 for (;;) 647 for (;;)
364 { 648 {
365 while (cxix >= 0) 649 while (expect_true (cxix >= 0))
366 { 650 {
367 PERL_CONTEXT *cx = &ccstk[cxix--]; 651 PERL_CONTEXT *cx = &ccstk[cxix--];
368 652
369 if (CxTYPE(cx) == CXt_SUB) 653 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
370 { 654 {
371 CV *cv = cx->blk_sub.cv; 655 CV *cv = cx->blk_sub.cv;
656
372 if (CvDEPTH(cv)) 657 if (expect_true (CvDEPTH (cv)))
373 { 658 {
374#ifdef USE_THREADS
375 /*XPUSHs ((SV *)CvOWNER(cv));*/
376 /*CvOWNER(cv) = 0;*/
377 /*error must unlock this cv etc.. etc...*/
378#endif
379 EXTEND (SP, CvDEPTH(cv)*2); 659 EXTEND (SP, 3);
380
381 while (--CvDEPTH(cv))
382 {
383 /* this tells the restore code to increment CvDEPTH */
384 PUSHs (Nullsv);
385 PUSHs ((SV *)cv);
386 }
387
388 PUSHs ((SV *)CvPADLIST(cv)); 660 PUSHs ((SV *)CvPADLIST (cv));
661 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
389 PUSHs ((SV *)cv); 662 PUSHs ((SV *)cv);
390 663
391 get_padlist (cv); /* this is a monster */ 664 CvDEPTH (cv) = 0;
665 get_padlist (aTHX_ cv);
392 } 666 }
393 } 667 }
394 else if (CxTYPE(cx) == CXt_FORMAT)
395 {
396 /* I never used formats, so how should I know how these are implemented? */
397 /* my bold guess is as a simple, plain sub... */
398 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
399 }
400 } 668 }
401 669
402 if (top_si->si_type == PERLSI_MAIN) 670 if (expect_true (top_si->si_type == PERLSI_MAIN))
403 break; 671 break;
404 672
405 top_si = top_si->si_prev; 673 top_si = top_si->si_prev;
406 ccstk = top_si->si_cxstack; 674 ccstk = top_si->si_cxstack;
407 cxix = top_si->si_cxix; 675 cxix = top_si->si_cxix;
408 } 676 }
409 677
410 PUTBACK; 678 PUTBACK;
411 } 679 }
412 680
413 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 681 /* allocate some space on the context stack for our purposes */
414 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 682 /* we manually unroll here, as usually 2 slots is enough */
415 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 683 if (SLOT_COUNT >= 1) CXINC;
684 if (SLOT_COUNT >= 2) CXINC;
685 if (SLOT_COUNT >= 3) CXINC;
686 {
687 unsigned int i;
688 for (i = 3; i < SLOT_COUNT; ++i)
689 CXINC;
690 }
691 cxstack_ix -= SLOT_COUNT; /* undo allocation */
416 692
417 c->dowarn = PL_dowarn;
418 c->in_eval = PL_in_eval;
419
420 c->curstackinfo = PL_curstackinfo;
421 c->curstack = PL_curstack;
422 c->mainstack = PL_mainstack; 693 c->mainstack = PL_mainstack;
423 c->stack_sp = PL_stack_sp; 694
424 c->op = PL_op; 695 {
425 c->curpad = PL_curpad; 696 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
426 c->comppad = PL_comppad; 697
427 c->stack_base = PL_stack_base; 698 slot->defav = GvAV (PL_defgv);
428 c->stack_max = PL_stack_max; 699 slot->defsv = DEFSV;
429 c->tmps_stack = PL_tmps_stack; 700 slot->errsv = ERRSV;
430 c->tmps_floor = PL_tmps_floor; 701 slot->irsgv = GvSV (irsgv);
431 c->tmps_ix = PL_tmps_ix; 702 slot->hinthv = GvHV (PL_hintgv);
432 c->tmps_max = PL_tmps_max; 703
433 c->markstack = PL_markstack; 704 #define VAR(name,type) slot->name = PL_ ## name;
434 c->markstack_ptr = PL_markstack_ptr; 705 # include "state.h"
435 c->markstack_max = PL_markstack_max; 706 #undef VAR
436 c->scopestack = PL_scopestack; 707 }
437 c->scopestack_ix = PL_scopestack_ix;
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} 708}
448 709
449/* 710/*
450 * allocate various perl stacks. This is an exact copy 711 * allocate various perl stacks. This is almost an exact copy
451 * of perl.c:init_stacks, except that it uses less memory 712 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need 713 * on the (sometimes correct) assumption that coroutines do
453 * a lot of stackspace. 714 * not usually need a lot of stackspace.
454 */ 715 */
455STATIC void 716#if CORO_PREFER_PERL_FUNCTIONS
717# define coro_init_stacks(thx) init_stacks ()
718#else
719static void
456coro_init_stacks (pTHX) 720coro_init_stacks (pTHX)
457{ 721{
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 722 PL_curstackinfo = new_stackinfo(32, 8);
459 PL_curstackinfo->si_type = PERLSI_MAIN; 723 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack; 724 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 725 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462 726
463 PL_stack_base = AvARRAY(PL_curstack); 727 PL_stack_base = AvARRAY(PL_curstack);
464 PL_stack_sp = PL_stack_base; 728 PL_stack_sp = PL_stack_base;
465 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 729 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466 730
467 New(50,PL_tmps_stack,96,SV*); 731 New(50,PL_tmps_stack,32,SV*);
468 PL_tmps_floor = -1; 732 PL_tmps_floor = -1;
469 PL_tmps_ix = -1; 733 PL_tmps_ix = -1;
470 PL_tmps_max = 96; 734 PL_tmps_max = 32;
471 735
472 New(54,PL_markstack,16,I32); 736 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack; 737 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16; 738 PL_markstack_max = PL_markstack + 16;
475 739
740#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 741 SET_MARK_OFFSET;
742#endif
477 743
478 New(54,PL_scopestack,16,I32); 744 New(54,PL_scopestack,8,I32);
479 PL_scopestack_ix = 0; 745 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16; 746 PL_scopestack_max = 8;
481 747
482 New(54,PL_savestack,96,ANY); 748 New(54,PL_savestack,24,ANY);
483 PL_savestack_ix = 0; 749 PL_savestack_ix = 0;
484 PL_savestack_max = 96; 750 PL_savestack_max = 24;
485 751
752#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 753 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 754 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 755 PL_retstack_max = 4;
756#endif
489} 757}
758#endif
490 759
491/* 760/*
492 * destroy the stacks, the callchain etc... 761 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */ 762 */
495STATIC void 763static void
496destroy_stacks(pTHX) 764coro_destruct_stacks (pTHX)
497{ 765{
498 if (!IN_DESTRUCT)
499 {
500 /* is this ugly, I ask? */
501 while (PL_scopestack_ix)
502 LEAVE;
503
504 /* sure it is, but more important: is it correct?? :/ */
505 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
506 FREETMPS;
507 }
508
509 while (PL_curstackinfo->si_next) 766 while (PL_curstackinfo->si_next)
510 PL_curstackinfo = PL_curstackinfo->si_next; 767 PL_curstackinfo = PL_curstackinfo->si_next;
511 768
512 while (PL_curstackinfo) 769 while (PL_curstackinfo)
513 { 770 {
514 PERL_SI *p = PL_curstackinfo->si_prev; 771 PERL_SI *p = PL_curstackinfo->si_prev;
515 772
516 {
517 dSP;
518 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519 PUTBACK; /* possibly superfluous */
520 }
521
522 if (!IN_DESTRUCT) 773 if (!IN_DESTRUCT)
523 {
524 dounwind(-1);
525 SvREFCNT_dec(PL_curstackinfo->si_stack); 774 SvREFCNT_dec (PL_curstackinfo->si_stack);
526 }
527 775
528 Safefree(PL_curstackinfo->si_cxstack); 776 Safefree (PL_curstackinfo->si_cxstack);
529 Safefree(PL_curstackinfo); 777 Safefree (PL_curstackinfo);
530 PL_curstackinfo = p; 778 PL_curstackinfo = p;
531 } 779 }
532 780
533 Safefree(PL_tmps_stack); 781 Safefree (PL_tmps_stack);
534 Safefree(PL_markstack); 782 Safefree (PL_markstack);
535 Safefree(PL_scopestack); 783 Safefree (PL_scopestack);
536 Safefree(PL_savestack); 784 Safefree (PL_savestack);
785#if !PERL_VERSION_ATLEAST (5,10,0)
537 Safefree(PL_retstack); 786 Safefree (PL_retstack);
538}
539
540static void
541allocate_stack (Coro__State ctx, int alloc)
542{
543 coro_stack *stack;
544
545 New (0, stack, 1, coro_stack);
546
547 stack->refcnt = 1;
548 stack->usecnt = 1;
549 stack->gencnt = ctx->gencnt = 0;
550 if (alloc)
551 {
552#if HAVE_MMAP
553 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
554 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555 if (stack->sptr == (void *)-1)
556#endif 787#endif
788}
789
790#define CORO_RSS \
791 rss += sizeof (SYM (curstackinfo)); \
792 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
793 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
794 rss += SYM (tmps_max) * sizeof (SV *); \
795 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
796 rss += SYM (scopestack_max) * sizeof (I32); \
797 rss += SYM (savestack_max) * sizeof (ANY);
798
799static size_t
800coro_rss (pTHX_ struct coro *coro)
801{
802 size_t rss = sizeof (*coro);
803
804 if (coro->mainstack)
805 {
806 if (coro->flags & CF_RUNNING)
557 { 807 {
558 /*FIXME*//*D*//* reasonable stack size! */ 808 #define SYM(sym) PL_ ## sym
559 stack->ssize = -4096 * sizeof (long); 809 CORO_RSS;
560 New (0, stack->sptr, 4096, long); 810 #undef SYM
561 } 811 }
562 }
563 else 812 else
564 stack->sptr = 0;
565
566 ctx->stack = stack;
567}
568
569static void
570deallocate_stack (Coro__State ctx)
571{
572 coro_stack *stack = ctx->stack;
573
574 ctx->stack = 0;
575
576 if (stack)
577 {
578 if (!--stack->refcnt)
579 { 813 {
580#ifdef HAVE_MMAP 814 #define SYM(sym) coro->slot->sym
581 if (stack->ssize > 0 && stack->sptr) 815 CORO_RSS;
582 munmap (stack->sptr, stack->ssize); 816 #undef SYM
583 else 817 }
584#else 818 }
585 Safefree (stack->sptr); 819
820 return rss;
821}
822
823/** coroutine stack handling ************************************************/
824
825static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
826static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
827static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
828
829/* apparently < 5.8.8 */
830#ifndef MgPV_nolen_const
831#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
832 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
833 (const char*)(mg)->mg_ptr)
586#endif 834#endif
587 Safefree (stack); 835
836/*
837 * This overrides the default magic get method of %SIG elements.
838 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
839 * and instead of trying to save and restore the hash elements, we just provide
840 * readback here.
841 */
842static int
843coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
844{
845 const char *s = MgPV_nolen_const (mg);
846
847 if (*s == '_')
848 {
849 SV **svp = 0;
850
851 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
852 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
853
854 if (svp)
855 {
856 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
857 return 0;
588 } 858 }
589 else if (ctx->gencnt == stack->gencnt) 859 }
590 --stack->usecnt; 860
861 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
862}
863
864static int
865coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
866{
867 const char *s = MgPV_nolen_const (mg);
868
869 if (*s == '_')
591 } 870 {
592} 871 SV **svp = 0;
593 872
873 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
874 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
875
876 if (svp)
877 {
878 SV *old = *svp;
879 *svp = 0;
880 SvREFCNT_dec (old);
881 return 0;
882 }
883 }
884
885 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
886}
887
594static void 888static int
595setup_coro (void *arg) 889coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
890{
891 const char *s = MgPV_nolen_const (mg);
892
893 if (*s == '_')
894 {
895 SV **svp = 0;
896
897 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
898 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
899
900 if (svp)
901 {
902 SV *old = *svp;
903 *svp = SvOK (sv) ? newSVsv (sv) : 0;
904 SvREFCNT_dec (old);
905 return 0;
906 }
907 }
908
909 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
910}
911
912static void
913prepare_nop (pTHX_ struct coro_transfer_args *ta)
914{
915 /* kind of mega-hacky, but works */
916 ta->next = ta->prev = (struct coro *)ta;
917}
918
919static int
920slf_check_nop (pTHX_ struct CoroSLF *frame)
921{
922 return 0;
923}
924
925static int
926slf_check_repeat (pTHX_ struct CoroSLF *frame)
927{
928 return 1;
929}
930
931static UNOP coro_setup_op;
932
933static void NOINLINE /* noinline to keep it out of the transfer fast path */
934coro_setup (pTHX_ struct coro *coro)
596{ 935{
597 /* 936 /*
598 * emulate part of the perl startup here. 937 * emulate part of the perl startup here.
599 */ 938 */
939 coro_init_stacks (aTHX);
940
941 PL_runops = RUNOPS_DEFAULT;
942 PL_curcop = &PL_compiling;
943 PL_in_eval = EVAL_NULL;
944 PL_comppad = 0;
945 PL_comppad_name = 0;
946 PL_comppad_name_fill = 0;
947 PL_comppad_name_floor = 0;
948 PL_curpm = 0;
949 PL_curpad = 0;
950 PL_localizing = 0;
951 PL_dirty = 0;
952 PL_restartop = 0;
953#if PERL_VERSION_ATLEAST (5,10,0)
954 PL_parser = 0;
955#endif
956 PL_hints = 0;
957
958 /* recreate the die/warn hooks */
959 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
960 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
961
962 GvSV (PL_defgv) = newSV (0);
963 GvAV (PL_defgv) = coro->args; coro->args = 0;
964 GvSV (PL_errgv) = newSV (0);
965 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
966 GvHV (PL_hintgv) = 0;
967 PL_rs = newSVsv (GvSV (irsgv));
968 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
969
970 {
971 dSP;
972 UNOP myop;
973
974 Zero (&myop, 1, UNOP);
975 myop.op_next = Nullop;
976 myop.op_type = OP_ENTERSUB;
977 myop.op_flags = OPf_WANT_VOID;
978
979 PUSHMARK (SP);
980 PUSHs ((SV *)coro->startcv);
981 PUTBACK;
982 PL_op = (OP *)&myop;
983 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
984 }
985
986 /* this newly created coroutine might be run on an existing cctx which most
987 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
988 */
989 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
990 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
991
992 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
993 coro_setup_op.op_next = PL_op;
994 coro_setup_op.op_type = OP_ENTERSUB;
995 coro_setup_op.op_ppaddr = pp_slf;
996 /* no flags etc. required, as an init function won't be called */
997
998 PL_op = (OP *)&coro_setup_op;
999
1000 /* copy throw, in case it was set before coro_setup */
1001 CORO_THROW = coro->except;
1002
1003 if (expect_false (enable_times))
1004 {
1005 coro_times_update ();
1006 coro_times_sub (coro);
1007 }
1008}
1009
1010static void
1011coro_unwind_stacks (pTHX)
1012{
1013 if (!IN_DESTRUCT)
1014 {
1015 /* restore all saved variables and stuff */
1016 LEAVE_SCOPE (0);
1017 assert (PL_tmps_floor == -1);
1018
1019 /* free all temporaries */
1020 FREETMPS;
1021 assert (PL_tmps_ix == -1);
1022
1023 /* unwind all extra stacks */
1024 POPSTACK_TO (PL_mainstack);
1025
1026 /* unwind main stack */
1027 dounwind (-1);
1028 }
1029}
1030
1031static void
1032coro_destruct_perl (pTHX_ struct coro *coro)
1033{
1034 SV *svf [9];
1035
1036 {
1037 struct coro *current = SvSTATE_current;
1038
1039 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1040
1041 save_perl (aTHX_ current);
1042 load_perl (aTHX_ coro);
1043
1044 coro_unwind_stacks (aTHX);
1045 coro_destruct_stacks (aTHX);
1046
1047 // now save some sv's to be free'd later
1048 svf [0] = GvSV (PL_defgv);
1049 svf [1] = (SV *)GvAV (PL_defgv);
1050 svf [2] = GvSV (PL_errgv);
1051 svf [3] = (SV *)PL_defoutgv;
1052 svf [4] = PL_rs;
1053 svf [5] = GvSV (irsgv);
1054 svf [6] = (SV *)GvHV (PL_hintgv);
1055 svf [7] = PL_diehook;
1056 svf [8] = PL_warnhook;
1057 assert (9 == sizeof (svf) / sizeof (*svf));
1058
1059 load_perl (aTHX_ current);
1060 }
1061
1062 {
1063 unsigned int i;
1064
1065 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1066 SvREFCNT_dec (svf [i]);
1067
1068 SvREFCNT_dec (coro->saved_deffh);
1069 SvREFCNT_dec (coro->rouse_cb);
1070 SvREFCNT_dec (coro->invoke_cb);
1071 SvREFCNT_dec (coro->invoke_av);
1072 }
1073}
1074
1075INLINE void
1076free_coro_mortal (pTHX)
1077{
1078 if (expect_true (coro_mortal))
1079 {
1080 SvREFCNT_dec (coro_mortal);
1081 coro_mortal = 0;
1082 }
1083}
1084
1085static int
1086runops_trace (pTHX)
1087{
1088 COP *oldcop = 0;
1089 int oldcxix = -2;
1090
1091 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1092 {
1093 PERL_ASYNC_CHECK ();
1094
1095 if (cctx_current->flags & CC_TRACE_ALL)
1096 {
1097 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1098 {
1099 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1100 SV **bot, **top;
1101 AV *av = newAV (); /* return values */
1102 SV **cb;
1103 dSP;
1104
1105 GV *gv = CvGV (cx->blk_sub.cv);
1106 SV *fullname = sv_2mortal (newSV (0));
1107 if (isGV (gv))
1108 gv_efullname3 (fullname, gv, 0);
1109
1110 bot = PL_stack_base + cx->blk_oldsp + 1;
1111 top = cx->blk_gimme == G_ARRAY ? SP + 1
1112 : cx->blk_gimme == G_SCALAR ? bot + 1
1113 : bot;
1114
1115 av_extend (av, top - bot);
1116 while (bot < top)
1117 av_push (av, SvREFCNT_inc_NN (*bot++));
1118
1119 PL_runops = RUNOPS_DEFAULT;
1120 ENTER;
1121 SAVETMPS;
1122 EXTEND (SP, 3);
1123 PUSHMARK (SP);
1124 PUSHs (&PL_sv_no);
1125 PUSHs (fullname);
1126 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1127 PUTBACK;
1128 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1129 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1130 SPAGAIN;
1131 FREETMPS;
1132 LEAVE;
1133 PL_runops = runops_trace;
1134 }
1135
1136 if (oldcop != PL_curcop)
1137 {
1138 oldcop = PL_curcop;
1139
1140 if (PL_curcop != &PL_compiling)
1141 {
1142 SV **cb;
1143
1144 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1145 {
1146 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1147
1148 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1149 {
1150 dSP;
1151 GV *gv = CvGV (cx->blk_sub.cv);
1152 SV *fullname = sv_2mortal (newSV (0));
1153
1154 if (isGV (gv))
1155 gv_efullname3 (fullname, gv, 0);
1156
1157 PL_runops = RUNOPS_DEFAULT;
1158 ENTER;
1159 SAVETMPS;
1160 EXTEND (SP, 3);
1161 PUSHMARK (SP);
1162 PUSHs (&PL_sv_yes);
1163 PUSHs (fullname);
1164 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1165 PUTBACK;
1166 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1167 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1168 SPAGAIN;
1169 FREETMPS;
1170 LEAVE;
1171 PL_runops = runops_trace;
1172 }
1173
1174 oldcxix = cxstack_ix;
1175 }
1176
1177 if (cctx_current->flags & CC_TRACE_LINE)
1178 {
1179 dSP;
1180
1181 PL_runops = RUNOPS_DEFAULT;
1182 ENTER;
1183 SAVETMPS;
1184 EXTEND (SP, 3);
1185 PL_runops = RUNOPS_DEFAULT;
1186 PUSHMARK (SP);
1187 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1188 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1189 PUTBACK;
1190 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1191 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1192 SPAGAIN;
1193 FREETMPS;
1194 LEAVE;
1195 PL_runops = runops_trace;
1196 }
1197 }
1198 }
1199 }
1200 }
1201
1202 TAINT_NOT;
1203 return 0;
1204}
1205
1206static struct CoroSLF cctx_ssl_frame;
1207
1208static void
1209slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1210{
1211 ta->prev = 0;
1212}
1213
1214static int
1215slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1216{
1217 *frame = cctx_ssl_frame;
1218
1219 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1220}
1221
1222/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1223static void NOINLINE
1224cctx_prepare (pTHX)
1225{
1226 PL_top_env = &PL_start_env;
1227
1228 if (cctx_current->flags & CC_TRACE)
1229 PL_runops = runops_trace;
1230
1231 /* we already must be executing an SLF op, there is no other valid way
1232 * that can lead to creation of a new cctx */
1233 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1234 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1235
1236 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1237 cctx_ssl_frame = slf_frame;
1238
1239 slf_frame.prepare = slf_prepare_set_stacklevel;
1240 slf_frame.check = slf_check_set_stacklevel;
1241}
1242
1243/* the tail of transfer: execute stuff we can only do after a transfer */
1244INLINE void
1245transfer_tail (pTHX)
1246{
1247 free_coro_mortal (aTHX);
1248}
1249
1250/*
1251 * this is a _very_ stripped down perl interpreter ;)
1252 */
1253static void
1254cctx_run (void *arg)
1255{
1256#ifdef USE_ITHREADS
1257# if CORO_PTHREAD
1258 PERL_SET_CONTEXT (coro_thx);
1259# endif
1260#endif
1261 {
1262 dTHX;
1263
1264 /* normally we would need to skip the entersub here */
1265 /* not doing so will re-execute it, which is exactly what we want */
1266 /* PL_nop = PL_nop->op_next */
1267
1268 /* inject a fake subroutine call to cctx_init */
1269 cctx_prepare (aTHX);
1270
1271 /* cctx_run is the alternative tail of transfer() */
1272 transfer_tail (aTHX);
1273
1274 /* somebody or something will hit me for both perl_run and PL_restartop */
1275 PL_restartop = PL_op;
1276 perl_run (PL_curinterp);
1277 /*
1278 * Unfortunately, there is no way to get at the return values of the
1279 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1280 * runtime errors here, as this is just a random interpreter, not a thread.
1281 */
1282
1283 /*
1284 * If perl-run returns we assume exit() was being called or the coro
1285 * fell off the end, which seems to be the only valid (non-bug)
1286 * reason for perl_run to return. We try to exit by jumping to the
1287 * bootstrap-time "top" top_env, as we cannot restore the "main"
1288 * coroutine as Coro has no such concept.
1289 * This actually isn't valid with the pthread backend, but OSes requiring
1290 * that backend are too broken to do it in a standards-compliant way.
1291 */
1292 PL_top_env = main_top_env;
1293 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1294 }
1295}
1296
1297static coro_cctx *
1298cctx_new ()
1299{
1300 coro_cctx *cctx;
1301
1302 ++cctx_count;
1303 New (0, cctx, 1, coro_cctx);
1304
1305 cctx->gen = cctx_gen;
1306 cctx->flags = 0;
1307 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1308
1309 return cctx;
1310}
1311
1312/* create a new cctx only suitable as source */
1313static coro_cctx *
1314cctx_new_empty ()
1315{
1316 coro_cctx *cctx = cctx_new ();
1317
1318 cctx->sptr = 0;
1319 coro_create (&cctx->cctx, 0, 0, 0, 0);
1320
1321 return cctx;
1322}
1323
1324/* create a new cctx suitable as destination/running a perl interpreter */
1325static coro_cctx *
1326cctx_new_run ()
1327{
1328 coro_cctx *cctx = cctx_new ();
1329 void *stack_start;
1330 size_t stack_size;
1331
1332#if HAVE_MMAP
1333 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1334 /* mmap supposedly does allocate-on-write for us */
1335 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1336
1337 if (cctx->sptr != (void *)-1)
1338 {
1339 #if CORO_STACKGUARD
1340 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1341 #endif
1342 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1343 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1344 cctx->flags |= CC_MAPPED;
1345 }
1346 else
1347#endif
1348 {
1349 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1350 New (0, cctx->sptr, cctx_stacksize, long);
1351
1352 if (!cctx->sptr)
1353 {
1354 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1355 _exit (EXIT_FAILURE);
1356 }
1357
1358 stack_start = cctx->sptr;
1359 stack_size = cctx->ssize;
1360 }
1361
1362 #if CORO_USE_VALGRIND
1363 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1364 #endif
1365
1366 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1367
1368 return cctx;
1369}
1370
1371static void
1372cctx_destroy (coro_cctx *cctx)
1373{
1374 if (!cctx)
1375 return;
1376
1377 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1378
1379 --cctx_count;
1380 coro_destroy (&cctx->cctx);
1381
1382 /* coro_transfer creates new, empty cctx's */
1383 if (cctx->sptr)
1384 {
1385 #if CORO_USE_VALGRIND
1386 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1387 #endif
1388
1389#if HAVE_MMAP
1390 if (cctx->flags & CC_MAPPED)
1391 munmap (cctx->sptr, cctx->ssize);
1392 else
1393#endif
1394 Safefree (cctx->sptr);
1395 }
1396
1397 Safefree (cctx);
1398}
1399
1400/* wether this cctx should be destructed */
1401#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1402
1403static coro_cctx *
1404cctx_get (pTHX)
1405{
1406 while (expect_true (cctx_first))
1407 {
1408 coro_cctx *cctx = cctx_first;
1409 cctx_first = cctx->next;
1410 --cctx_idle;
1411
1412 if (expect_true (!CCTX_EXPIRED (cctx)))
1413 return cctx;
1414
1415 cctx_destroy (cctx);
1416 }
1417
1418 return cctx_new_run ();
1419}
1420
1421static void
1422cctx_put (coro_cctx *cctx)
1423{
1424 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1425
1426 /* free another cctx if overlimit */
1427 if (expect_false (cctx_idle >= cctx_max_idle))
1428 {
1429 coro_cctx *first = cctx_first;
1430 cctx_first = first->next;
1431 --cctx_idle;
1432
1433 cctx_destroy (first);
1434 }
1435
1436 ++cctx_idle;
1437 cctx->next = cctx_first;
1438 cctx_first = cctx;
1439}
1440
1441/** coroutine switching *****************************************************/
1442
1443static void
1444transfer_check (pTHX_ struct coro *prev, struct coro *next)
1445{
1446 /* TODO: throwing up here is considered harmful */
1447
1448 if (expect_true (prev != next))
1449 {
1450 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1451 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1452
1453 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1454 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1455
1456#if !PERL_VERSION_ATLEAST (5,10,0)
1457 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1458 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1459#endif
1460 }
1461}
1462
1463/* always use the TRANSFER macro */
1464static void NOINLINE /* noinline so we have a fixed stackframe */
1465transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1466{
1467 dSTACKLEVEL;
1468
1469 /* sometimes transfer is only called to set idle_sp */
1470 if (expect_false (!prev))
1471 {
1472 cctx_current->idle_sp = STACKLEVEL;
1473 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1474 }
1475 else if (expect_true (prev != next))
1476 {
1477 coro_cctx *cctx_prev;
1478
1479 if (expect_false (prev->flags & CF_NEW))
1480 {
1481 /* create a new empty/source context */
1482 prev->flags &= ~CF_NEW;
1483 prev->flags |= CF_RUNNING;
1484 }
1485
1486 prev->flags &= ~CF_RUNNING;
1487 next->flags |= CF_RUNNING;
1488
1489 /* first get rid of the old state */
1490 save_perl (aTHX_ prev);
1491
1492 if (expect_false (next->flags & CF_NEW))
1493 {
1494 /* need to start coroutine */
1495 next->flags &= ~CF_NEW;
1496 /* setup coroutine call */
1497 coro_setup (aTHX_ next);
1498 }
1499 else
1500 load_perl (aTHX_ next);
1501
1502 /* possibly untie and reuse the cctx */
1503 if (expect_true (
1504 cctx_current->idle_sp == STACKLEVEL
1505 && !(cctx_current->flags & CC_TRACE)
1506 && !force_cctx
1507 ))
1508 {
1509 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1510 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1511
1512 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1513 /* without this the next cctx_get might destroy the running cctx while still in use */
1514 if (expect_false (CCTX_EXPIRED (cctx_current)))
1515 if (expect_true (!next->cctx))
1516 next->cctx = cctx_get (aTHX);
1517
1518 cctx_put (cctx_current);
1519 }
1520 else
1521 prev->cctx = cctx_current;
1522
1523 ++next->usecount;
1524
1525 cctx_prev = cctx_current;
1526 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1527
1528 next->cctx = 0;
1529
1530 if (expect_false (cctx_prev != cctx_current))
1531 {
1532 cctx_prev->top_env = PL_top_env;
1533 PL_top_env = cctx_current->top_env;
1534 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1535 }
1536
1537 transfer_tail (aTHX);
1538 }
1539}
1540
1541#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1542#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1543
1544/** high level stuff ********************************************************/
1545
1546static int
1547coro_state_destroy (pTHX_ struct coro *coro)
1548{
1549 if (coro->flags & CF_DESTROYED)
1550 return 0;
1551
1552 if (coro->on_destroy && !PL_dirty)
1553 coro->on_destroy (aTHX_ coro);
1554
1555 coro->flags |= CF_DESTROYED;
1556
1557 if (coro->flags & CF_READY)
1558 {
1559 /* reduce nready, as destroying a ready coro effectively unreadies it */
1560 /* alternative: look through all ready queues and remove the coro */
1561 --coro_nready;
1562 }
1563 else
1564 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1565
1566 if (coro->mainstack
1567 && coro->mainstack != main_mainstack
1568 && coro->slot
1569 && !PL_dirty)
1570 coro_destruct_perl (aTHX_ coro);
1571
1572 cctx_destroy (coro->cctx);
1573 SvREFCNT_dec (coro->startcv);
1574 SvREFCNT_dec (coro->args);
1575 SvREFCNT_dec (CORO_THROW);
1576
1577 if (coro->next) coro->next->prev = coro->prev;
1578 if (coro->prev) coro->prev->next = coro->next;
1579 if (coro == coro_first) coro_first = coro->next;
1580
1581 return 1;
1582}
1583
1584static int
1585coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1586{
1587 struct coro *coro = (struct coro *)mg->mg_ptr;
1588 mg->mg_ptr = 0;
1589
1590 coro->hv = 0;
1591
1592 if (--coro->refcnt < 0)
1593 {
1594 coro_state_destroy (aTHX_ coro);
1595 Safefree (coro);
1596 }
1597
1598 return 0;
1599}
1600
1601static int
1602coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1603{
1604 struct coro *coro = (struct coro *)mg->mg_ptr;
1605
1606 ++coro->refcnt;
1607
1608 return 0;
1609}
1610
1611static MGVTBL coro_state_vtbl = {
1612 0, 0, 0, 0,
1613 coro_state_free,
1614 0,
1615#ifdef MGf_DUP
1616 coro_state_dup,
1617#else
1618# define MGf_DUP 0
1619#endif
1620};
1621
1622static void
1623prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1624{
1625 ta->prev = SvSTATE (prev_sv);
1626 ta->next = SvSTATE (next_sv);
1627 TRANSFER_CHECK (*ta);
1628}
1629
1630static void
1631api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1632{
1633 struct coro_transfer_args ta;
1634
1635 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1636 TRANSFER (ta, 1);
1637}
1638
1639/** Coro ********************************************************************/
1640
1641INLINE void
1642coro_enq (pTHX_ struct coro *coro)
1643{
1644 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1645
1646 SvREFCNT_inc_NN (coro->hv);
1647
1648 coro->next_ready = 0;
1649 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1650 ready [1] = coro;
1651}
1652
1653INLINE struct coro *
1654coro_deq (pTHX)
1655{
1656 int prio;
1657
1658 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1659 {
1660 struct coro **ready = coro_ready [prio];
1661
1662 if (ready [0])
1663 {
1664 struct coro *coro = ready [0];
1665 ready [0] = coro->next_ready;
1666 return coro;
1667 }
1668 }
1669
1670 return 0;
1671}
1672
1673static void
1674invoke_sv_ready_hook_helper (void)
1675{
1676 dTHX;
600 dSP; 1677 dSP;
601 Coro__State ctx = (Coro__State)arg;
602 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
603 1678
604 coro_init_stacks (aTHX); 1679 ENTER;
605 /*PL_curcop = 0;*/ 1680 SAVETMPS;
606 /*PL_in_eval = PL_in_eval;*/ /* inherit */
607 SvREFCNT_dec (GvAV (PL_defgv));
608 GvAV (PL_defgv) = ctx->args;
609 1681
610 SPAGAIN;
611
612 if (ctx->stack)
613 {
614 ctx->cursp = 0;
615
616 PUSHMARK(SP); 1682 PUSHMARK (SP);
617 PUTBACK; 1683 PUTBACK;
618 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1684 call_sv (coro_readyhook, G_VOID | G_DISCARD);
619 1685
620 if (SvTRUE (ERRSV)) 1686 FREETMPS;
621 croak (NULL); 1687 LEAVE;
622 else 1688}
623 croak ("FATAL: CCTXT coroutine returned!"); 1689
1690static int
1691api_ready (pTHX_ SV *coro_sv)
1692{
1693 struct coro *coro = SvSTATE (coro_sv);
1694
1695 if (coro->flags & CF_READY)
1696 return 0;
1697
1698 coro->flags |= CF_READY;
1699
1700 coro_enq (aTHX_ coro);
1701
1702 if (!coro_nready++)
1703 if (coroapi.readyhook)
1704 coroapi.readyhook ();
1705
1706 return 1;
1707}
1708
1709static int
1710api_is_ready (pTHX_ SV *coro_sv)
1711{
1712 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1713}
1714
1715/* expects to own a reference to next->hv */
1716INLINE void
1717prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1718{
1719 SV *prev_sv = SvRV (coro_current);
1720
1721 ta->prev = SvSTATE_hv (prev_sv);
1722 ta->next = next;
1723
1724 TRANSFER_CHECK (*ta);
1725
1726 SvRV_set (coro_current, (SV *)next->hv);
1727
1728 free_coro_mortal (aTHX);
1729 coro_mortal = prev_sv;
1730}
1731
1732static void
1733prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1734{
1735 for (;;)
624 } 1736 {
625 else 1737 struct coro *next = coro_deq (aTHX);
626 {
627 UNOP myop;
628 1738
629 PL_op = (OP *)&myop; 1739 if (expect_true (next))
630
631 Zero(&myop, 1, UNOP);
632 myop.op_next = Nullop;
633 myop.op_flags = OPf_WANT_VOID;
634
635 PUSHMARK(SP);
636 XPUSHs (sub_init);
637 /*
638 * the next line is slightly wrong, as PL_op->op_next
639 * is actually being executed so we skip the first op.
640 * that doesn't matter, though, since it is only
641 * pp_nextstate and we never return...
642 * ah yes, and I don't care anyways ;)
643 */
644 PUTBACK;
645 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
646 SPAGAIN;
647
648 ENTER; /* necessary e.g. for dounwind */
649 }
650}
651
652static void
653continue_coro (void *arg)
654{
655 /*
656 * this is a _very_ stripped down perl interpreter ;)
657 */
658 Coro__State ctx = (Coro__State)arg;
659 JMPENV coro_start_env;
660
661 /* same as JMPENV_BOOTSTRAP */
662 Zero(&coro_start_env, 1, JMPENV);
663 coro_start_env.je_ret = -1;
664 coro_start_env.je_mustcatch = TRUE;
665 PL_top_env = &coro_start_env;
666
667 ctx->cursp = 0;
668 PL_op = PL_op->op_next;
669 CALLRUNOPS(aTHX);
670
671 abort ();
672}
673
674STATIC void
675transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
676{
677 dSTACKLEVEL;
678 static struct coro *xnext;
679
680 if (prev != next)
681 {
682 xnext = next;
683
684 if (next->mainstack)
685 { 1740 {
686 SAVE (prev, flags); 1741 /* cannot transfer to destroyed coros, skip and look for next */
687 LOAD (next); 1742 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
688 1743 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
689 /* mark this state as in-use */ 1744 else
690 next->mainstack = 0;
691 next->tmps_ix = -2;
692
693 /* stacklevel changed? if yes, grab the stack for us! */
694 if (flags & TRANSFER_SAVE_CCTXT)
695 { 1745 {
696 if (!prev->stack) 1746 next->flags &= ~CF_READY;
697 allocate_stack (prev, 0); 1747 --coro_nready;
698 else if (prev->cursp != stacklevel 1748
699 && prev->stack->usecnt > 1) 1749 prepare_schedule_to (aTHX_ ta, next);
700 { 1750 break;
701 prev->gencnt = ++prev->stack->gencnt;
702 prev->stack->usecnt = 1;
703 }
704
705 /* has our stack been invalidated? */
706 if (next->stack && next->stack->gencnt != next->gencnt)
707 {
708 deallocate_stack (next);
709 allocate_stack (next, 1);
710 coro_create (&(next->stack->cctx),
711 continue_coro, (void *)next,
712 next->stack->sptr, labs (next->stack->ssize));
713 }
714
715 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716 /* don't add any code here */
717 } 1751 }
718
719 } 1752 }
720 else if (next->tmps_ix == -2)
721 croak ("tried to transfer to running coroutine");
722 else 1753 else
723 { 1754 {
724 SAVE (prev, -1); /* first get rid of the old state */ 1755 /* nothing to schedule: call the idle handler */
725 1756 if (SvROK (sv_idle)
726 if (flags & TRANSFER_SAVE_CCTXT) 1757 && SvOBJECT (SvRV (sv_idle)))
727 { 1758 {
728 if (!prev->stack) 1759 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
729 allocate_stack (prev, 0); 1760 api_ready (aTHX_ SvRV (sv_idle));
730 1761 --coro_nready;
731 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732 {
733 setup_coro (next);
734
735 prev->stack->refcnt++;
736 prev->stack->usecnt++;
737 next->stack = prev->stack;
738 next->gencnt = prev->gencnt;
739 }
740 else
741 {
742 allocate_stack (next, 1);
743 coro_create (&(next->stack->cctx),
744 setup_coro, (void *)next,
745 next->stack->sptr, labs (next->stack->ssize));
746 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747 /* don't add any code here */
748 }
749 } 1762 }
750 else 1763 else
751 setup_coro (next); 1764 {
1765 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1766 dSP;
1767
1768 ENTER;
1769 SAVETMPS;
1770
1771 PUSHMARK (SP);
1772 PUTBACK;
1773 call_sv (sv_idle, G_VOID | G_DISCARD);
1774
1775 FREETMPS;
1776 LEAVE;
1777 }
752 } 1778 }
753
754 /*
755 * xnext is now either prev or next, depending on wether
756 * we switched the c stack or not. that's why I use a global
757 * variable, that should become thread-specific at one point.
758 */
759 xnext->cursp = stacklevel;
760 }
761
762 if (coro_mortal)
763 { 1779 }
764 SvREFCNT_dec (coro_mortal); 1780}
765 coro_mortal = 0; 1781
1782INLINE void
1783prepare_cede (pTHX_ struct coro_transfer_args *ta)
1784{
1785 api_ready (aTHX_ coro_current);
1786 prepare_schedule (aTHX_ ta);
1787}
1788
1789INLINE void
1790prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1791{
1792 SV *prev = SvRV (coro_current);
1793
1794 if (coro_nready)
766 } 1795 {
767} 1796 prepare_schedule (aTHX_ ta);
768 1797 api_ready (aTHX_ prev);
769#define SV_CORO(sv,func) \
770 do { \
771 if (SvROK (sv)) \
772 sv = SvRV (sv); \
773 \
774 if (SvTYPE(sv) == SVt_PVHV) \
775 { \
776 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
777 \
778 if (!he) \
779 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
780 \
781 (sv) = SvRV (HeVAL(he)); \
782 } \
783 \
784 /* must also be changed inside Coro::Cont::yield */ \
785 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
786 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
787 \
788 } while(0)
789
790#define SvSTATE(sv) (struct coro *)SvIV (sv)
791
792static void
793api_transfer(pTHX_ SV *prev, SV *next, int flags)
794{
795 SV_CORO (prev, "Coro::transfer");
796 SV_CORO (next, "Coro::transfer");
797
798 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
799}
800
801/** Coro ********************************************************************/
802
803#define PRIO_MAX 3
804#define PRIO_HIGH 1
805#define PRIO_NORMAL 0
806#define PRIO_LOW -1
807#define PRIO_IDLE -3
808#define PRIO_MIN -4
809
810/* for Coro.pm */
811static GV *coro_current, *coro_idle;
812static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
813static int coro_nready;
814
815static void
816coro_enq (SV *sv)
817{
818 if (SvTYPE (sv) == SVt_PVHV)
819 { 1798 }
820 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0); 1799 else
821 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 1800 prepare_nop (aTHX_ ta);
1801}
822 1802
823 prio = prio > PRIO_MAX ? PRIO_MAX 1803static void
824 : prio < PRIO_MIN ? PRIO_MIN 1804api_schedule (pTHX)
825 : prio; 1805{
1806 struct coro_transfer_args ta;
826 1807
827 av_push (coro_ready [prio - PRIO_MIN], sv); 1808 prepare_schedule (aTHX_ &ta);
828 coro_nready++; 1809 TRANSFER (ta, 1);
1810}
829 1811
1812static void
1813api_schedule_to (pTHX_ SV *coro_sv)
1814{
1815 struct coro_transfer_args ta;
1816 struct coro *next = SvSTATE (coro_sv);
1817
1818 SvREFCNT_inc_NN (coro_sv);
1819 prepare_schedule_to (aTHX_ &ta, next);
1820}
1821
1822static int
1823api_cede (pTHX)
1824{
1825 struct coro_transfer_args ta;
1826
1827 prepare_cede (aTHX_ &ta);
1828
1829 if (expect_true (ta.prev != ta.next))
1830 {
1831 TRANSFER (ta, 1);
830 return; 1832 return 1;
1833 }
1834 else
1835 return 0;
1836}
1837
1838static int
1839api_cede_notself (pTHX)
1840{
1841 if (coro_nready)
1842 {
1843 struct coro_transfer_args ta;
1844
1845 prepare_cede_notself (aTHX_ &ta);
1846 TRANSFER (ta, 1);
1847 return 1;
1848 }
1849 else
1850 return 0;
1851}
1852
1853static void
1854api_trace (pTHX_ SV *coro_sv, int flags)
1855{
1856 struct coro *coro = SvSTATE (coro_sv);
1857
1858 if (coro->flags & CF_RUNNING)
1859 croak ("cannot enable tracing on a running coroutine, caught");
1860
1861 if (flags & CC_TRACE)
1862 {
1863 if (!coro->cctx)
1864 coro->cctx = cctx_new_run ();
1865 else if (!(coro->cctx->flags & CC_TRACE))
1866 croak ("cannot enable tracing on coroutine with custom stack, caught");
1867
1868 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1869 }
1870 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1871 {
1872 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1873
1874 if (coro->flags & CF_RUNNING)
1875 PL_runops = RUNOPS_DEFAULT;
1876 else
1877 coro->slot->runops = RUNOPS_DEFAULT;
1878 }
1879}
1880
1881static void
1882coro_call_on_destroy (pTHX_ struct coro *coro)
1883{
1884 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
1885 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
1886
1887 if (on_destroyp)
1888 {
1889 AV *on_destroy = (AV *)SvRV (*on_destroyp);
1890
1891 while (AvFILLp (on_destroy) >= 0)
1892 {
1893 dSP; /* don't disturb outer sp */
1894 SV *cb = av_pop (on_destroy);
1895
1896 PUSHMARK (SP);
1897
1898 if (statusp)
1899 {
1900 int i;
1901 AV *status = (AV *)SvRV (*statusp);
1902 EXTEND (SP, AvFILLp (status) + 1);
1903
1904 for (i = 0; i <= AvFILLp (status); ++i)
1905 PUSHs (AvARRAY (status)[i]);
1906 }
1907
1908 PUTBACK;
1909 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
1910 }
1911 }
1912}
1913
1914static void
1915slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1916{
1917 int i;
1918 HV *hv = (HV *)SvRV (coro_current);
1919 AV *av = newAV ();
1920
1921 /* items are actually not so common, so optimise for this case */
1922 if (items)
1923 {
1924 av_extend (av, items - 1);
1925
1926 for (i = 0; i < items; ++i)
1927 av_push (av, SvREFCNT_inc_NN (arg [i]));
1928 }
1929
1930 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
1931
1932 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
1933 api_ready (aTHX_ sv_manager);
1934
1935 frame->prepare = prepare_schedule;
1936 frame->check = slf_check_repeat;
1937
1938 /* as a minor optimisation, we could unwind all stacks here */
1939 /* but that puts extra pressure on pp_slf, and is not worth much */
1940 /*coro_unwind_stacks (aTHX);*/
1941}
1942
1943/*****************************************************************************/
1944/* async pool handler */
1945
1946static int
1947slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
1948{
1949 HV *hv = (HV *)SvRV (coro_current);
1950 struct coro *coro = (struct coro *)frame->data;
1951
1952 if (!coro->invoke_cb)
1953 return 1; /* loop till we have invoke */
1954 else
1955 {
1956 hv_store (hv, "desc", sizeof ("desc") - 1,
1957 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1958
1959 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
1960
1961 {
1962 dSP;
1963 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
1964 PUTBACK;
831 } 1965 }
832 1966
833 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 1967 SvREFCNT_dec (GvAV (PL_defgv));
1968 GvAV (PL_defgv) = coro->invoke_av;
1969 coro->invoke_av = 0;
1970
1971 return 0;
1972 }
1973}
1974
1975static void
1976slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
1977{
1978 HV *hv = (HV *)SvRV (coro_current);
1979 struct coro *coro = SvSTATE_hv ((SV *)hv);
1980
1981 if (expect_true (coro->saved_deffh))
1982 {
1983 /* subsequent iteration */
1984 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1985 coro->saved_deffh = 0;
1986
1987 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
1988 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1989 {
1990 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
1991 coro->invoke_av = newAV ();
1992
1993 frame->prepare = prepare_nop;
1994 }
1995 else
1996 {
1997 av_clear (GvAV (PL_defgv));
1998 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
1999
2000 coro->prio = 0;
2001
2002 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2003 api_trace (aTHX_ coro_current, 0);
2004
2005 frame->prepare = prepare_schedule;
2006 av_push (av_async_pool, SvREFCNT_inc (hv));
2007 }
2008 }
2009 else
2010 {
2011 /* first iteration, simply fall through */
2012 frame->prepare = prepare_nop;
2013 }
2014
2015 frame->check = slf_check_pool_handler;
2016 frame->data = (void *)coro;
2017}
2018
2019/*****************************************************************************/
2020/* rouse callback */
2021
2022#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2023
2024static void
2025coro_rouse_callback (pTHX_ CV *cv)
2026{
2027 dXSARGS;
2028 SV *data = (SV *)S_GENSUB_ARG;
2029
2030 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2031 {
2032 /* first call, set args */
2033 SV *coro = SvRV (data);
2034 AV *av = newAV ();
2035
2036 SvRV_set (data, (SV *)av);
2037
2038 /* better take a full copy of the arguments */
2039 while (items--)
2040 av_store (av, items, newSVsv (ST (items)));
2041
2042 api_ready (aTHX_ coro);
2043 SvREFCNT_dec (coro);
2044 }
2045
2046 XSRETURN_EMPTY;
2047}
2048
2049static int
2050slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2051{
2052 SV *data = (SV *)frame->data;
2053
2054 if (CORO_THROW)
2055 return 0;
2056
2057 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2058 return 1;
2059
2060 /* now push all results on the stack */
2061 {
2062 dSP;
2063 AV *av = (AV *)SvRV (data);
2064 int i;
2065
2066 EXTEND (SP, AvFILLp (av) + 1);
2067 for (i = 0; i <= AvFILLp (av); ++i)
2068 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2069
2070 /* we have stolen the elements, so set length to zero and free */
2071 AvFILLp (av) = -1;
2072 av_undef (av);
2073
2074 PUTBACK;
2075 }
2076
2077 return 0;
2078}
2079
2080static void
2081slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2082{
2083 SV *cb;
2084
2085 if (items)
2086 cb = arg [0];
2087 else
2088 {
2089 struct coro *coro = SvSTATE_current;
2090
2091 if (!coro->rouse_cb)
2092 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2093
2094 cb = sv_2mortal (coro->rouse_cb);
2095 coro->rouse_cb = 0;
2096 }
2097
2098 if (!SvROK (cb)
2099 || SvTYPE (SvRV (cb)) != SVt_PVCV
2100 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2101 croak ("Coro::rouse_wait called with illegal callback argument,");
2102
2103 {
2104 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2105 SV *data = (SV *)S_GENSUB_ARG;
2106
2107 frame->data = (void *)data;
2108 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2109 frame->check = slf_check_rouse_wait;
2110 }
834} 2111}
835 2112
836static SV * 2113static SV *
837coro_deq (int min_prio) 2114coro_new_rouse_cb (pTHX)
838{ 2115{
839 int prio = PRIO_MAX - PRIO_MIN; 2116 HV *hv = (HV *)SvRV (coro_current);
2117 struct coro *coro = SvSTATE_hv (hv);
2118 SV *data = newRV_inc ((SV *)hv);
2119 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
840 2120
841 min_prio -= PRIO_MIN; 2121 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
842 if (min_prio < 0) 2122 SvREFCNT_dec (data); /* magicext increases the refcount */
843 min_prio = 0;
844 2123
845 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2124 SvREFCNT_dec (coro->rouse_cb);
846 if (av_len (coro_ready[prio]) >= 0) 2125 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2126
2127 return cb;
2128}
2129
2130/*****************************************************************************/
2131/* schedule-like-function opcode (SLF) */
2132
2133static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2134static const CV *slf_cv;
2135static SV **slf_argv;
2136static int slf_argc, slf_arga; /* count, allocated */
2137static I32 slf_ax; /* top of stack, for restore */
2138
2139/* this restores the stack in the case we patched the entersub, to */
2140/* recreate the stack frame as perl will on following calls */
2141/* since entersub cleared the stack */
2142static OP *
2143pp_restore (pTHX)
2144{
2145 int i;
2146 SV **SP = PL_stack_base + slf_ax;
2147
2148 PUSHMARK (SP);
2149
2150 EXTEND (SP, slf_argc + 1);
2151
2152 for (i = 0; i < slf_argc; ++i)
2153 PUSHs (sv_2mortal (slf_argv [i]));
2154
2155 PUSHs ((SV *)CvGV (slf_cv));
2156
2157 RETURNOP (slf_restore.op_first);
2158}
2159
2160static void
2161slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2162{
2163 SV **arg = (SV **)slf_frame.data;
2164
2165 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2166}
2167
2168static void
2169slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2170{
2171 if (items != 2)
2172 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2173
2174 frame->prepare = slf_prepare_transfer;
2175 frame->check = slf_check_nop;
2176 frame->data = (void *)arg; /* let's hope it will stay valid */
2177}
2178
2179static void
2180slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2181{
2182 frame->prepare = prepare_schedule;
2183 frame->check = slf_check_nop;
2184}
2185
2186static void
2187slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2188{
2189 struct coro *next = (struct coro *)slf_frame.data;
2190
2191 SvREFCNT_inc_NN (next->hv);
2192 prepare_schedule_to (aTHX_ ta, next);
2193}
2194
2195static void
2196slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2197{
2198 if (!items)
2199 croak ("Coro::schedule_to expects a coroutine argument, caught");
2200
2201 frame->data = (void *)SvSTATE (arg [0]);
2202 frame->prepare = slf_prepare_schedule_to;
2203 frame->check = slf_check_nop;
2204}
2205
2206static void
2207slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2208{
2209 api_ready (aTHX_ SvRV (coro_current));
2210
2211 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2212}
2213
2214static void
2215slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2216{
2217 frame->prepare = prepare_cede;
2218 frame->check = slf_check_nop;
2219}
2220
2221static void
2222slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2223{
2224 frame->prepare = prepare_cede_notself;
2225 frame->check = slf_check_nop;
2226}
2227
2228/*
2229 * these not obviously related functions are all rolled into one
2230 * function to increase chances that they all will call transfer with the same
2231 * stack offset
2232 * SLF stands for "schedule-like-function".
2233 */
2234static OP *
2235pp_slf (pTHX)
2236{
2237 I32 checkmark; /* mark SP to see how many elements check has pushed */
2238
2239 /* set up the slf frame, unless it has already been set-up */
2240 /* the latter happens when a new coro has been started */
2241 /* or when a new cctx was attached to an existing coroutine */
2242 if (expect_true (!slf_frame.prepare))
2243 {
2244 /* first iteration */
2245 dSP;
2246 SV **arg = PL_stack_base + TOPMARK + 1;
2247 int items = SP - arg; /* args without function object */
2248 SV *gv = *sp;
2249
2250 /* do a quick consistency check on the "function" object, and if it isn't */
2251 /* for us, divert to the real entersub */
2252 if (SvTYPE (gv) != SVt_PVGV
2253 || !GvCV (gv)
2254 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2255 return PL_ppaddr[OP_ENTERSUB](aTHX);
2256
2257 if (!(PL_op->op_flags & OPf_STACKED))
847 { 2258 {
848 coro_nready--; 2259 /* ampersand-form of call, use @_ instead of stack */
849 return av_shift (coro_ready[prio]); 2260 AV *av = GvAV (PL_defgv);
2261 arg = AvARRAY (av);
2262 items = AvFILLp (av) + 1;
850 } 2263 }
2264
2265 /* now call the init function, which needs to set up slf_frame */
2266 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2267 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2268
2269 /* pop args */
2270 SP = PL_stack_base + POPMARK;
2271
2272 PUTBACK;
2273 }
2274
2275 /* now that we have a slf_frame, interpret it! */
2276 /* we use a callback system not to make the code needlessly */
2277 /* complicated, but so we can run multiple perl coros from one cctx */
2278
2279 do
2280 {
2281 struct coro_transfer_args ta;
2282
2283 slf_frame.prepare (aTHX_ &ta);
2284 TRANSFER (ta, 0);
2285
2286 checkmark = PL_stack_sp - PL_stack_base;
2287 }
2288 while (slf_frame.check (aTHX_ &slf_frame));
2289
2290 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2291
2292 /* exception handling */
2293 if (expect_false (CORO_THROW))
2294 {
2295 SV *exception = sv_2mortal (CORO_THROW);
2296
2297 CORO_THROW = 0;
2298 sv_setsv (ERRSV, exception);
2299 croak (0);
2300 }
2301
2302 /* return value handling - mostly like entersub */
2303 /* make sure we put something on the stack in scalar context */
2304 if (GIMME_V == G_SCALAR)
2305 {
2306 dSP;
2307 SV **bot = PL_stack_base + checkmark;
2308
2309 if (sp == bot) /* too few, push undef */
2310 bot [1] = &PL_sv_undef;
2311 else if (sp != bot + 1) /* too many, take last one */
2312 bot [1] = *sp;
2313
2314 SP = bot + 1;
2315
2316 PUTBACK;
2317 }
2318
2319 return NORMAL;
2320}
2321
2322static void
2323api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2324{
2325 int i;
2326 SV **arg = PL_stack_base + ax;
2327 int items = PL_stack_sp - arg + 1;
2328
2329 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2330
2331 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2332 && PL_op->op_ppaddr != pp_slf)
2333 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2334
2335 CvFLAGS (cv) |= CVf_SLF;
2336 CvNODEBUG_on (cv);
2337 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2338 slf_cv = cv;
2339
2340 /* we patch the op, and then re-run the whole call */
2341 /* we have to put the same argument on the stack for this to work */
2342 /* and this will be done by pp_restore */
2343 slf_restore.op_next = (OP *)&slf_restore;
2344 slf_restore.op_type = OP_CUSTOM;
2345 slf_restore.op_ppaddr = pp_restore;
2346 slf_restore.op_first = PL_op;
2347
2348 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2349
2350 if (PL_op->op_flags & OPf_STACKED)
2351 {
2352 if (items > slf_arga)
2353 {
2354 slf_arga = items;
2355 free (slf_argv);
2356 slf_argv = malloc (slf_arga * sizeof (SV *));
2357 }
2358
2359 slf_argc = items;
2360
2361 for (i = 0; i < items; ++i)
2362 slf_argv [i] = SvREFCNT_inc (arg [i]);
2363 }
2364 else
2365 slf_argc = 0;
2366
2367 PL_op->op_ppaddr = pp_slf;
2368 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2369
2370 PL_op = (OP *)&slf_restore;
2371}
2372
2373/*****************************************************************************/
2374/* dynamic wind */
2375
2376static void
2377on_enterleave_call (pTHX_ SV *cb)
2378{
2379 dSP;
2380
2381 PUSHSTACK;
2382
2383 PUSHMARK (SP);
2384 PUTBACK;
2385 call_sv (cb, G_VOID | G_DISCARD);
2386 SPAGAIN;
2387
2388 POPSTACK;
2389}
2390
2391static SV *
2392coro_avp_pop_and_free (pTHX_ AV **avp)
2393{
2394 AV *av = *avp;
2395 SV *res = av_pop (av);
2396
2397 if (AvFILLp (av) < 0)
2398 {
2399 *avp = 0;
2400 SvREFCNT_dec (av);
2401 }
2402
2403 return res;
2404}
2405
2406static void
2407coro_pop_on_enter (pTHX_ void *coro)
2408{
2409 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2410 SvREFCNT_dec (cb);
2411}
2412
2413static void
2414coro_pop_on_leave (pTHX_ void *coro)
2415{
2416 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2417 on_enterleave_call (aTHX_ sv_2mortal (cb));
2418}
2419
2420/*****************************************************************************/
2421/* PerlIO::cede */
2422
2423typedef struct
2424{
2425 PerlIOBuf base;
2426 NV next, every;
2427} PerlIOCede;
2428
2429static IV
2430PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2431{
2432 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2433
2434 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2435 self->next = nvtime () + self->every;
2436
2437 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2438}
2439
2440static SV *
2441PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2442{
2443 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2444
2445 return newSVnv (self->every);
2446}
2447
2448static IV
2449PerlIOCede_flush (pTHX_ PerlIO *f)
2450{
2451 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2452 double now = nvtime ();
2453
2454 if (now >= self->next)
2455 {
2456 api_cede (aTHX);
2457 self->next = now + self->every;
2458 }
2459
2460 return PerlIOBuf_flush (aTHX_ f);
2461}
2462
2463static PerlIO_funcs PerlIO_cede =
2464{
2465 sizeof(PerlIO_funcs),
2466 "cede",
2467 sizeof(PerlIOCede),
2468 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2469 PerlIOCede_pushed,
2470 PerlIOBuf_popped,
2471 PerlIOBuf_open,
2472 PerlIOBase_binmode,
2473 PerlIOCede_getarg,
2474 PerlIOBase_fileno,
2475 PerlIOBuf_dup,
2476 PerlIOBuf_read,
2477 PerlIOBuf_unread,
2478 PerlIOBuf_write,
2479 PerlIOBuf_seek,
2480 PerlIOBuf_tell,
2481 PerlIOBuf_close,
2482 PerlIOCede_flush,
2483 PerlIOBuf_fill,
2484 PerlIOBase_eof,
2485 PerlIOBase_error,
2486 PerlIOBase_clearerr,
2487 PerlIOBase_setlinebuf,
2488 PerlIOBuf_get_base,
2489 PerlIOBuf_bufsiz,
2490 PerlIOBuf_get_ptr,
2491 PerlIOBuf_get_cnt,
2492 PerlIOBuf_set_ptrcnt,
2493};
2494
2495/*****************************************************************************/
2496/* Coro::Semaphore & Coro::Signal */
2497
2498static SV *
2499coro_waitarray_new (pTHX_ int count)
2500{
2501 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2502 AV *av = newAV ();
2503 SV **ary;
2504
2505 /* unfortunately, building manually saves memory */
2506 Newx (ary, 2, SV *);
2507 AvALLOC (av) = ary;
2508#if PERL_VERSION_ATLEAST (5,10,0)
2509 AvARRAY (av) = ary;
2510#else
2511 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2512 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2513 SvPVX ((SV *)av) = (char *)ary;
2514#endif
2515 AvMAX (av) = 1;
2516 AvFILLp (av) = 0;
2517 ary [0] = newSViv (count);
2518
2519 return newRV_noinc ((SV *)av);
2520}
2521
2522/* semaphore */
2523
2524static void
2525coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2526{
2527 SV *count_sv = AvARRAY (av)[0];
2528 IV count = SvIVX (count_sv);
2529
2530 count += adjust;
2531 SvIVX (count_sv) = count;
2532
2533 /* now wake up as many waiters as are expected to lock */
2534 while (count > 0 && AvFILLp (av) > 0)
2535 {
2536 SV *cb;
2537
2538 /* swap first two elements so we can shift a waiter */
2539 AvARRAY (av)[0] = AvARRAY (av)[1];
2540 AvARRAY (av)[1] = count_sv;
2541 cb = av_shift (av);
2542
2543 if (SvOBJECT (cb))
2544 {
2545 api_ready (aTHX_ cb);
2546 --count;
2547 }
2548 else if (SvTYPE (cb) == SVt_PVCV)
2549 {
2550 dSP;
2551 PUSHMARK (SP);
2552 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2553 PUTBACK;
2554 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2555 }
2556
2557 SvREFCNT_dec (cb);
2558 }
2559}
2560
2561static void
2562coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2563{
2564 /* call $sem->adjust (0) to possibly wake up some other waiters */
2565 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2566}
2567
2568static int
2569slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2570{
2571 AV *av = (AV *)frame->data;
2572 SV *count_sv = AvARRAY (av)[0];
2573
2574 /* if we are about to throw, don't actually acquire the lock, just throw */
2575 if (CORO_THROW)
2576 return 0;
2577 else if (SvIVX (count_sv) > 0)
2578 {
2579 SvSTATE_current->on_destroy = 0;
2580
2581 if (acquire)
2582 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2583 else
2584 coro_semaphore_adjust (aTHX_ av, 0);
2585
2586 return 0;
2587 }
2588 else
2589 {
2590 int i;
2591 /* if we were woken up but can't down, we look through the whole */
2592 /* waiters list and only add us if we aren't in there already */
2593 /* this avoids some degenerate memory usage cases */
2594
2595 for (i = 1; i <= AvFILLp (av); ++i)
2596 if (AvARRAY (av)[i] == SvRV (coro_current))
2597 return 1;
2598
2599 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2600 return 1;
2601 }
2602}
2603
2604static int
2605slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2606{
2607 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2608}
2609
2610static int
2611slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2612{
2613 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2614}
2615
2616static void
2617slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2618{
2619 AV *av = (AV *)SvRV (arg [0]);
2620
2621 if (SvIVX (AvARRAY (av)[0]) > 0)
2622 {
2623 frame->data = (void *)av;
2624 frame->prepare = prepare_nop;
2625 }
2626 else
2627 {
2628 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2629
2630 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2631 frame->prepare = prepare_schedule;
2632
2633 /* to avoid race conditions when a woken-up coro gets terminated */
2634 /* we arrange for a temporary on_destroy that calls adjust (0) */
2635 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2636 }
2637}
2638
2639static void
2640slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2641{
2642 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2643 frame->check = slf_check_semaphore_down;
2644}
2645
2646static void
2647slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2648{
2649 if (items >= 2)
2650 {
2651 /* callback form */
2652 AV *av = (AV *)SvRV (arg [0]);
2653 SV *cb_cv = s_get_cv_croak (arg [1]);
2654
2655 av_push (av, SvREFCNT_inc_NN (cb_cv));
2656
2657 if (SvIVX (AvARRAY (av)[0]) > 0)
2658 coro_semaphore_adjust (aTHX_ av, 0);
2659
2660 frame->prepare = prepare_nop;
2661 frame->check = slf_check_nop;
2662 }
2663 else
2664 {
2665 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2666 frame->check = slf_check_semaphore_wait;
2667 }
2668}
2669
2670/* signal */
2671
2672static void
2673coro_signal_wake (pTHX_ AV *av, int count)
2674{
2675 SvIVX (AvARRAY (av)[0]) = 0;
2676
2677 /* now signal count waiters */
2678 while (count > 0 && AvFILLp (av) > 0)
2679 {
2680 SV *cb;
2681
2682 /* swap first two elements so we can shift a waiter */
2683 cb = AvARRAY (av)[0];
2684 AvARRAY (av)[0] = AvARRAY (av)[1];
2685 AvARRAY (av)[1] = cb;
2686
2687 cb = av_shift (av);
2688
2689 if (SvTYPE (cb) == SVt_PVCV)
2690 {
2691 dSP;
2692 PUSHMARK (SP);
2693 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2694 PUTBACK;
2695 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2696 }
2697 else
2698 {
2699 api_ready (aTHX_ cb);
2700 sv_setiv (cb, 0); /* signal waiter */
2701 }
2702
2703 SvREFCNT_dec (cb);
2704
2705 --count;
2706 }
2707}
2708
2709static int
2710slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2711{
2712 /* if we are about to throw, also stop waiting */
2713 return SvROK ((SV *)frame->data) && !CORO_THROW;
2714}
2715
2716static void
2717slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2718{
2719 AV *av = (AV *)SvRV (arg [0]);
2720
2721 if (items >= 2)
2722 {
2723 SV *cb_cv = s_get_cv_croak (arg [1]);
2724 av_push (av, SvREFCNT_inc_NN (cb_cv));
2725
2726 if (SvIVX (AvARRAY (av)[0]))
2727 coro_signal_wake (aTHX_ av, 1); /* ust be the only waiter */
2728
2729 frame->prepare = prepare_nop;
2730 frame->check = slf_check_nop;
2731 }
2732 else if (SvIVX (AvARRAY (av)[0]))
2733 {
2734 SvIVX (AvARRAY (av)[0]) = 0;
2735 frame->prepare = prepare_nop;
2736 frame->check = slf_check_nop;
2737 }
2738 else
2739 {
2740 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2741
2742 av_push (av, waiter);
2743
2744 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2745 frame->prepare = prepare_schedule;
2746 frame->check = slf_check_signal_wait;
2747 }
2748}
2749
2750/*****************************************************************************/
2751/* Coro::AIO */
2752
2753#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2754
2755/* helper storage struct */
2756struct io_state
2757{
2758 int errorno;
2759 I32 laststype; /* U16 in 5.10.0 */
2760 int laststatval;
2761 Stat_t statcache;
2762};
2763
2764static void
2765coro_aio_callback (pTHX_ CV *cv)
2766{
2767 dXSARGS;
2768 AV *state = (AV *)S_GENSUB_ARG;
2769 SV *coro = av_pop (state);
2770 SV *data_sv = newSV (sizeof (struct io_state));
2771
2772 av_extend (state, items - 1);
2773
2774 sv_upgrade (data_sv, SVt_PV);
2775 SvCUR_set (data_sv, sizeof (struct io_state));
2776 SvPOK_only (data_sv);
2777
2778 {
2779 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2780
2781 data->errorno = errno;
2782 data->laststype = PL_laststype;
2783 data->laststatval = PL_laststatval;
2784 data->statcache = PL_statcache;
2785 }
2786
2787 /* now build the result vector out of all the parameters and the data_sv */
2788 {
2789 int i;
2790
2791 for (i = 0; i < items; ++i)
2792 av_push (state, SvREFCNT_inc_NN (ST (i)));
2793 }
2794
2795 av_push (state, data_sv);
2796
2797 api_ready (aTHX_ coro);
2798 SvREFCNT_dec (coro);
2799 SvREFCNT_dec ((AV *)state);
2800}
2801
2802static int
2803slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2804{
2805 AV *state = (AV *)frame->data;
2806
2807 /* if we are about to throw, return early */
2808 /* this does not cancel the aio request, but at least */
2809 /* it quickly returns */
2810 if (CORO_THROW)
2811 return 0;
2812
2813 /* one element that is an RV? repeat! */
2814 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2815 return 1;
2816
2817 /* restore status */
2818 {
2819 SV *data_sv = av_pop (state);
2820 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2821
2822 errno = data->errorno;
2823 PL_laststype = data->laststype;
2824 PL_laststatval = data->laststatval;
2825 PL_statcache = data->statcache;
2826
2827 SvREFCNT_dec (data_sv);
2828 }
2829
2830 /* push result values */
2831 {
2832 dSP;
2833 int i;
2834
2835 EXTEND (SP, AvFILLp (state) + 1);
2836 for (i = 0; i <= AvFILLp (state); ++i)
2837 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2838
2839 PUTBACK;
2840 }
851 2841
852 return 0; 2842 return 0;
853} 2843}
854 2844
855static void 2845static void
856api_ready (SV *coro) 2846slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
857{ 2847{
858 if (SvROK (coro)) 2848 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
859 coro = SvRV (coro);
860
861 coro_enq (SvREFCNT_inc (coro));
862}
863
864static void
865api_schedule (void)
866{
867 SV *prev, *next;
868
869 prev = SvRV (GvSV (coro_current)); 2849 SV *coro_hv = SvRV (coro_current);
870 next = coro_deq (PRIO_MIN); 2850 struct coro *coro = SvSTATE_hv (coro_hv);
871 2851
872 if (!next) 2852 /* put our coroutine id on the state arg */
873 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 2853 av_push (state, SvREFCNT_inc_NN (coro_hv));
874 2854
875 /* free this only after the transfer */ 2855 /* first see whether we have a non-zero priority and set it as AIO prio */
876 coro_mortal = prev; 2856 if (coro->prio)
877 SV_CORO (prev, "Coro::schedule"); 2857 {
2858 dSP;
878 2859
879 SvRV (GvSV (coro_current)) = next; 2860 static SV *prio_cv;
2861 static SV *prio_sv;
880 2862
881 SV_CORO (next, "Coro::schedule"); 2863 if (expect_false (!prio_cv))
2864 {
2865 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2866 prio_sv = newSViv (0);
2867 }
882 2868
883 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 2869 PUSHMARK (SP);
884 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 2870 sv_setiv (prio_sv, coro->prio);
885} 2871 XPUSHs (prio_sv);
886 2872
887static void 2873 PUTBACK;
888api_cede (void) 2874 call_sv (prio_cv, G_VOID | G_DISCARD);
889{ 2875 }
890 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
891 2876
892 api_schedule (); 2877 /* now call the original request */
893} 2878 {
2879 dSP;
2880 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
2881 int i;
894 2882
2883 PUSHMARK (SP);
2884
2885 /* first push all args to the stack */
2886 EXTEND (SP, items + 1);
2887
2888 for (i = 0; i < items; ++i)
2889 PUSHs (arg [i]);
2890
2891 /* now push the callback closure */
2892 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
2893
2894 /* now call the AIO function - we assume our request is uncancelable */
2895 PUTBACK;
2896 call_sv ((SV *)req, G_VOID | G_DISCARD);
2897 }
2898
2899 /* now that the requets is going, we loop toll we have a result */
2900 frame->data = (void *)state;
2901 frame->prepare = prepare_schedule;
2902 frame->check = slf_check_aio_req;
2903}
2904
2905static void
2906coro_aio_req_xs (pTHX_ CV *cv)
2907{
2908 dXSARGS;
2909
2910 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
2911
2912 XSRETURN_EMPTY;
2913}
2914
2915/*****************************************************************************/
2916
2917#if CORO_CLONE
2918# include "clone.c"
2919#endif
2920
2921/*****************************************************************************/
2922
2923static SV *
2924coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
2925{
2926 SV *coro_sv;
2927 struct coro *coro;
2928 MAGIC *mg;
2929 HV *hv;
2930 SV *cb;
2931 int i;
2932
2933 if (argc > 0)
2934 {
2935 cb = s_get_cv_croak (argv [0]);
2936
2937 if (!is_coro)
2938 {
2939 if (CvISXSUB (cb))
2940 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
2941
2942 if (!CvROOT (cb))
2943 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
2944 }
2945 }
2946
2947 Newz (0, coro, 1, struct coro);
2948 coro->args = newAV ();
2949 coro->flags = CF_NEW;
2950
2951 if (coro_first) coro_first->prev = coro;
2952 coro->next = coro_first;
2953 coro_first = coro;
2954
2955 coro->hv = hv = newHV ();
2956 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
2957 mg->mg_flags |= MGf_DUP;
2958 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
2959
2960 if (argc > 0)
2961 {
2962 av_extend (coro->args, argc + is_coro - 1);
2963
2964 if (is_coro)
2965 {
2966 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
2967 cb = (SV *)cv_coro_run;
2968 }
2969
2970 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
2971
2972 for (i = 1; i < argc; i++)
2973 av_push (coro->args, newSVsv (argv [i]));
2974 }
2975
2976 return coro_sv;
2977}
2978
895MODULE = Coro::State PACKAGE = Coro::State 2979MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
896 2980
897PROTOTYPES: ENABLE 2981PROTOTYPES: DISABLE
898 2982
899BOOT: 2983BOOT:
900{ /* {} necessary for stoopid perl-5.6.x */ 2984{
901 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 2985#ifdef USE_ITHREADS
902 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 2986# if CORO_PTHREAD
2987 coro_thx = PERL_GET_CONTEXT;
2988# endif
2989#endif
2990 BOOT_PAGESIZE;
2991
2992 cctx_current = cctx_new_empty ();
2993
2994 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
2995 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
2996
2997 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
2998 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
2999 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3000
3001 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3002 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3003 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3004
903 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3005 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
904 3006
905 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3007 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
906 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3008 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
907 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3009 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
908 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3010 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
909
910 if (!padlist_cache)
911 padlist_cache = newHV ();
912 3011
913 main_mainstack = PL_mainstack; 3012 main_mainstack = PL_mainstack;
3013 main_top_env = PL_top_env;
914 3014
3015 while (main_top_env->je_prev)
3016 main_top_env = main_top_env->je_prev;
3017
3018 {
3019 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3020
3021 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3022 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3023
3024 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3025 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3026 }
3027
915 coroapi.ver = CORO_API_VERSION; 3028 coroapi.ver = CORO_API_VERSION;
3029 coroapi.rev = CORO_API_REVISION;
3030
916 coroapi.transfer = api_transfer; 3031 coroapi.transfer = api_transfer;
917}
918 3032
919Coro::State 3033 coroapi.sv_state = SvSTATE_;
920_newprocess(args) 3034 coroapi.execute_slf = api_execute_slf;
921 SV * args 3035 coroapi.prepare_nop = prepare_nop;
3036 coroapi.prepare_schedule = prepare_schedule;
3037 coroapi.prepare_cede = prepare_cede;
3038 coroapi.prepare_cede_notself = prepare_cede_notself;
3039
3040 {
3041 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
3042
3043 if (!svp) croak ("Time::HiRes is required");
3044 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
3045
3046 nvtime = INT2PTR (double (*)(), SvIV (*svp));
3047
3048 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
3049 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
3050 }
3051
3052 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3053}
3054
3055SV *
3056new (SV *klass, ...)
3057 ALIAS:
3058 Coro::new = 1
3059 CODE:
3060 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3061 OUTPUT:
3062 RETVAL
3063
3064void
3065transfer (...)
3066 PROTOTYPE: $$
3067 CODE:
3068 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3069
3070bool
3071_destroy (SV *coro_sv)
3072 CODE:
3073 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3074 OUTPUT:
3075 RETVAL
3076
3077void
3078_exit (int code)
922 PROTOTYPE: $ 3079 PROTOTYPE: $
3080 CODE:
3081 _exit (code);
3082
3083SV *
3084clone (Coro::State coro)
3085 CODE:
3086{
3087#if CORO_CLONE
3088 struct coro *ncoro = coro_clone (aTHX_ coro);
3089 MAGIC *mg;
3090 /* TODO: too much duplication */
3091 ncoro->hv = newHV ();
3092 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3093 mg->mg_flags |= MGf_DUP;
3094 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3095#else
3096 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3097#endif
3098}
3099 OUTPUT:
3100 RETVAL
3101
3102int
3103cctx_stacksize (int new_stacksize = 0)
3104 PROTOTYPE: ;$
3105 CODE:
3106 RETVAL = cctx_stacksize;
3107 if (new_stacksize)
3108 {
3109 cctx_stacksize = new_stacksize;
3110 ++cctx_gen;
3111 }
3112 OUTPUT:
3113 RETVAL
3114
3115int
3116cctx_max_idle (int max_idle = 0)
3117 PROTOTYPE: ;$
3118 CODE:
3119 RETVAL = cctx_max_idle;
3120 if (max_idle > 1)
3121 cctx_max_idle = max_idle;
3122 OUTPUT:
3123 RETVAL
3124
3125int
3126cctx_count ()
3127 PROTOTYPE:
3128 CODE:
3129 RETVAL = cctx_count;
3130 OUTPUT:
3131 RETVAL
3132
3133int
3134cctx_idle ()
3135 PROTOTYPE:
3136 CODE:
3137 RETVAL = cctx_idle;
3138 OUTPUT:
3139 RETVAL
3140
3141void
3142list ()
3143 PROTOTYPE:
3144 PPCODE:
3145{
3146 struct coro *coro;
3147 for (coro = coro_first; coro; coro = coro->next)
3148 if (coro->hv)
3149 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3150}
3151
3152void
3153call (Coro::State coro, SV *coderef)
3154 ALIAS:
3155 eval = 1
3156 CODE:
3157{
3158 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3159 {
3160 struct coro *current = SvSTATE_current;
3161
3162 if (current != coro)
3163 {
3164 PUTBACK;
3165 save_perl (aTHX_ current);
3166 load_perl (aTHX_ coro);
3167 SPAGAIN;
3168 }
3169
3170 PUSHSTACK;
3171
3172 PUSHMARK (SP);
3173 PUTBACK;
3174
3175 if (ix)
3176 eval_sv (coderef, 0);
3177 else
3178 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3179
3180 POPSTACK;
3181 SPAGAIN;
3182
3183 if (current != coro)
3184 {
3185 PUTBACK;
3186 save_perl (aTHX_ coro);
3187 load_perl (aTHX_ current);
3188 SPAGAIN;
3189 }
3190 }
3191}
3192
3193SV *
3194is_ready (Coro::State coro)
3195 PROTOTYPE: $
3196 ALIAS:
3197 is_ready = CF_READY
3198 is_running = CF_RUNNING
3199 is_new = CF_NEW
3200 is_destroyed = CF_DESTROYED
3201 is_suspended = CF_SUSPENDED
3202 CODE:
3203 RETVAL = boolSV (coro->flags & ix);
3204 OUTPUT:
3205 RETVAL
3206
3207void
3208throw (Coro::State self, SV *throw = &PL_sv_undef)
3209 PROTOTYPE: $;$
923 CODE: 3210 CODE:
924 Coro__State coro; 3211{
3212 struct coro *current = SvSTATE_current;
3213 SV **throwp = self == current ? &CORO_THROW : &self->except;
3214 SvREFCNT_dec (*throwp);
3215 SvGETMAGIC (throw);
3216 *throwp = SvOK (throw) ? newSVsv (throw) : 0;
3217}
925 3218
926 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3219void
927 croak ("Coro::State::_newprocess expects an arrayref"); 3220api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3221 PROTOTYPE: $;$
3222 C_ARGS: aTHX_ coro, flags
3223
3224SV *
3225has_cctx (Coro::State coro)
3226 PROTOTYPE: $
3227 CODE:
3228 /* maybe manage the running flag differently */
3229 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3230 OUTPUT:
3231 RETVAL
3232
3233int
3234is_traced (Coro::State coro)
3235 PROTOTYPE: $
3236 CODE:
3237 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3238 OUTPUT:
3239 RETVAL
3240
3241UV
3242rss (Coro::State coro)
3243 PROTOTYPE: $
3244 ALIAS:
3245 usecount = 1
3246 CODE:
3247 switch (ix)
3248 {
3249 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3250 case 1: RETVAL = coro->usecount; break;
928 3251 }
929 New (0, coro, 1, struct coro); 3252 OUTPUT:
930
931 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
932 coro->mainstack = 0; /* actual work is done inside transfer */
933 coro->stack = 0;
934
935 RETVAL = coro; 3253 RETVAL
3254
3255void
3256force_cctx ()
3257 PROTOTYPE:
3258 CODE:
3259 cctx_current->idle_sp = 0;
3260
3261void
3262swap_defsv (Coro::State self)
3263 PROTOTYPE: $
3264 ALIAS:
3265 swap_defav = 1
3266 CODE:
3267 if (!self->slot)
3268 croak ("cannot swap state with coroutine that has no saved state,");
3269 else
3270 {
3271 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3272 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3273
3274 SV *tmp = *src; *src = *dst; *dst = tmp;
3275 }
3276
3277void
3278cancel (Coro::State self)
3279 CODE:
3280 coro_state_destroy (aTHX_ self);
3281 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3282
3283
3284SV *
3285enable_times (int enabled = enable_times)
3286 CODE:
3287{
3288 RETVAL = boolSV (enable_times);
3289
3290 if (enabled != enable_times)
3291 {
3292 enable_times = enabled;
3293
3294 coro_times_update ();
3295 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3296 }
3297}
936 OUTPUT: 3298 OUTPUT:
937 RETVAL 3299 RETVAL
938 3300
939void 3301void
940transfer(prev, next, flags) 3302times (Coro::State self)
941 SV *prev 3303 PPCODE:
942 SV *next 3304{
943 int flags 3305 struct coro *current = SvSTATE (coro_current);
944 PROTOTYPE: @ 3306
3307 if (expect_false (current == self))
3308 {
3309 coro_times_update ();
3310 coro_times_add (SvSTATE (coro_current));
3311 }
3312
3313 EXTEND (SP, 2);
3314 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3315 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3316
3317 if (expect_false (current == self))
3318 coro_times_sub (SvSTATE (coro_current));
3319}
3320
3321MODULE = Coro::State PACKAGE = Coro
3322
3323BOOT:
3324{
3325 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3326 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3327 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3328 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3329 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3330 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3331 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3332 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3333 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3334
3335 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3336 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3337 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3338 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3339
3340 coro_stash = gv_stashpv ("Coro", TRUE);
3341
3342 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3343 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3344 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3345 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3346 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3347 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3348
3349 {
3350 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3351
3352 coroapi.schedule = api_schedule;
3353 coroapi.schedule_to = api_schedule_to;
3354 coroapi.cede = api_cede;
3355 coroapi.cede_notself = api_cede_notself;
3356 coroapi.ready = api_ready;
3357 coroapi.is_ready = api_is_ready;
3358 coroapi.nready = coro_nready;
3359 coroapi.current = coro_current;
3360
3361 /*GCoroAPI = &coroapi;*/
3362 sv_setiv (sv, (IV)&coroapi);
3363 SvREADONLY_on (sv);
3364 }
3365}
3366
3367SV *
3368async (...)
3369 PROTOTYPE: &@
945 CODE: 3370 CODE:
946 PUTBACK; 3371 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
947 SV_CORO (next, "Coro::transfer"); 3372 api_ready (aTHX_ RETVAL);
948 SV_CORO (prev, "Coro::transfer"); 3373 OUTPUT:
949 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 3374 RETVAL
950 SPAGAIN;
951 3375
952void 3376void
953DESTROY(coro) 3377terminate (...)
954 Coro::State coro 3378 CODE:
955 CODE: 3379 CORO_EXECUTE_SLF_XS (slf_init_terminate);
956
957 if (coro->mainstack && coro->mainstack != main_mainstack)
958 {
959 struct coro temp;
960
961 PUTBACK;
962 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
963 LOAD(aTHX_ coro);
964 SPAGAIN;
965
966 destroy_stacks (aTHX);
967
968 LOAD((&temp)); /* this will get rid of defsv etc.. */
969 SPAGAIN;
970
971 coro->mainstack = 0;
972 }
973
974 deallocate_stack (coro);
975
976 Safefree (coro);
977 3380
978void 3381void
979flush() 3382schedule (...)
980 CODE: 3383 CODE:
981#ifdef MAY_FLUSH 3384 CORO_EXECUTE_SLF_XS (slf_init_schedule);
982 flush_padlist_cache ();
983#endif
984 3385
985void 3386void
986_exit(code) 3387schedule_to (...)
987 int code 3388 CODE:
3389 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3390
3391void
3392cede_to (...)
3393 CODE:
3394 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3395
3396void
3397cede (...)
3398 CODE:
3399 CORO_EXECUTE_SLF_XS (slf_init_cede);
3400
3401void
3402cede_notself (...)
3403 CODE:
3404 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3405
3406void
3407_set_current (SV *current)
988 PROTOTYPE: $ 3408 PROTOTYPE: $
989 CODE: 3409 CODE:
990#if defined(__GLIBC__) || _POSIX_C_SOURCE 3410 SvREFCNT_dec (SvRV (coro_current));
991 _exit (code); 3411 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
992#else
993 signal (SIGTERM, SIG_DFL);
994 raise (SIGTERM);
995 exit (code);
996#endif
997
998MODULE = Coro::State PACKAGE = Coro::Cont
999
1000# this is slightly dirty (should expose a c-level api)
1001 3412
1002void 3413void
1003yield(...) 3414_set_readyhook (SV *hook)
1004 PROTOTYPE: @ 3415 PROTOTYPE: $
1005 CODE: 3416 CODE:
1006 static SV *returnstk;
1007 SV *sv;
1008 AV *defav = GvAV (PL_defgv);
1009 struct coro *prev, *next;
1010
1011 if (!returnstk)
1012 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1013
1014 /* set up @_ -- ugly */
1015 av_clear (defav);
1016 av_fill (defav, items - 1);
1017 while (items--)
1018 av_store (defav, items, SvREFCNT_inc (ST(items)));
1019
1020 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021 sv = av_pop ((AV *)SvRV (returnstk));
1022 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1023 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1024 SvREFCNT_dec (sv); 3417 SvREFCNT_dec (coro_readyhook);
1025 3418 SvGETMAGIC (hook);
1026 transfer(aTHX_ prev, next, 0); 3419 if (SvOK (hook))
1027 3420 {
1028MODULE = Coro::State PACKAGE = Coro
1029
1030# this is slightly dirty (should expose a c-level api)
1031
1032BOOT:
1033{
1034 int i;
1035 HV *stash = gv_stashpv ("Coro", TRUE);
1036
1037 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043
1044 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1045 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1046
1047 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1048 coro_ready[i] = newAV (); 3421 coro_readyhook = newSVsv (hook);
1049 3422 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1050 {
1051 SV *sv = perl_get_sv("Coro::API", 1);
1052
1053 coroapi.schedule = api_schedule;
1054 coroapi.cede = api_cede;
1055 coroapi.ready = api_ready;
1056 coroapi.nready = &coro_nready;
1057 coroapi.current = coro_current;
1058
1059 GCoroAPI = &coroapi;
1060 sv_setiv(sv, (IV)&coroapi);
1061 SvREADONLY_on(sv);
1062 } 3423 }
1063} 3424 else
3425 {
3426 coro_readyhook = 0;
3427 CORO_READYHOOK = 0;
3428 }
1064 3429
1065void 3430int
3431prio (Coro::State coro, int newprio = 0)
3432 PROTOTYPE: $;$
3433 ALIAS:
3434 nice = 1
3435 CODE:
3436{
3437 RETVAL = coro->prio;
3438
3439 if (items > 1)
3440 {
3441 if (ix)
3442 newprio = coro->prio - newprio;
3443
3444 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3445 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3446
3447 coro->prio = newprio;
3448 }
3449}
3450 OUTPUT:
3451 RETVAL
3452
3453SV *
1066ready(self) 3454ready (SV *self)
1067 SV * self
1068 PROTOTYPE: $ 3455 PROTOTYPE: $
1069 CODE: 3456 CODE:
1070 api_ready (self); 3457 RETVAL = boolSV (api_ready (aTHX_ self));
3458 OUTPUT:
3459 RETVAL
1071 3460
1072int 3461int
1073nready(...) 3462nready (...)
1074 PROTOTYPE: 3463 PROTOTYPE:
1075 CODE: 3464 CODE:
1076 RETVAL = coro_nready; 3465 RETVAL = coro_nready;
1077 OUTPUT: 3466 OUTPUT:
1078 RETVAL 3467 RETVAL
1079 3468
1080void 3469void
1081schedule(...) 3470suspend (Coro::State self)
1082 PROTOTYPE: 3471 PROTOTYPE: $
1083 CODE: 3472 CODE:
1084 api_schedule (); 3473 self->flags |= CF_SUSPENDED;
1085 3474
1086void 3475void
1087cede(...) 3476resume (Coro::State self)
1088 PROTOTYPE: 3477 PROTOTYPE: $
1089 CODE: 3478 CODE:
3479 self->flags &= ~CF_SUSPENDED;
3480
3481void
3482_pool_handler (...)
3483 CODE:
3484 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3485
3486void
3487async_pool (SV *cv, ...)
3488 PROTOTYPE: &@
3489 PPCODE:
3490{
3491 HV *hv = (HV *)av_pop (av_async_pool);
3492 AV *av = newAV ();
3493 SV *cb = ST (0);
3494 int i;
3495
3496 av_extend (av, items - 2);
3497 for (i = 1; i < items; ++i)
3498 av_push (av, SvREFCNT_inc_NN (ST (i)));
3499
3500 if ((SV *)hv == &PL_sv_undef)
3501 {
3502 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3503 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3504 SvREFCNT_dec (sv);
3505 }
3506
3507 {
3508 struct coro *coro = SvSTATE_hv (hv);
3509
3510 assert (!coro->invoke_cb);
3511 assert (!coro->invoke_av);
3512 coro->invoke_cb = SvREFCNT_inc (cb);
3513 coro->invoke_av = av;
3514 }
3515
3516 api_ready (aTHX_ (SV *)hv);
3517
3518 if (GIMME_V != G_VOID)
3519 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3520 else
3521 SvREFCNT_dec (hv);
3522}
3523
3524SV *
3525rouse_cb ()
3526 PROTOTYPE:
3527 CODE:
3528 RETVAL = coro_new_rouse_cb (aTHX);
3529 OUTPUT:
3530 RETVAL
3531
3532void
3533rouse_wait (...)
3534 PROTOTYPE: ;$
3535 PPCODE:
3536 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3537
3538void
3539on_enter (SV *block)
3540 ALIAS:
3541 on_leave = 1
3542 PROTOTYPE: &
3543 CODE:
3544{
3545 struct coro *coro = SvSTATE_current;
3546 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3547
3548 block = s_get_cv_croak (block);
3549
3550 if (!*avp)
3551 *avp = newAV ();
3552
3553 av_push (*avp, SvREFCNT_inc (block));
3554
3555 if (!ix)
3556 on_enterleave_call (aTHX_ block);
3557
3558 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3559 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3560 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3561}
3562
3563
3564MODULE = Coro::State PACKAGE = PerlIO::cede
3565
3566BOOT:
3567 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3568
3569
3570MODULE = Coro::State PACKAGE = Coro::Semaphore
3571
3572SV *
3573new (SV *klass, SV *count = 0)
3574 CODE:
3575{
3576 int semcnt = 1;
3577
3578 if (count)
3579 {
3580 SvGETMAGIC (count);
3581
3582 if (SvOK (count))
3583 semcnt = SvIV (count);
3584 }
3585
3586 RETVAL = sv_bless (
3587 coro_waitarray_new (aTHX_ semcnt),
3588 GvSTASH (CvGV (cv))
3589 );
3590}
3591 OUTPUT:
3592 RETVAL
3593
3594# helper for Coro::Channel and others
3595SV *
3596_alloc (int count)
3597 CODE:
3598 RETVAL = coro_waitarray_new (aTHX_ count);
3599 OUTPUT:
3600 RETVAL
3601
3602SV *
3603count (SV *self)
3604 CODE:
3605 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3606 OUTPUT:
3607 RETVAL
3608
3609void
3610up (SV *self, int adjust = 1)
3611 ALIAS:
3612 adjust = 1
3613 CODE:
3614 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3615
3616void
3617down (...)
3618 CODE:
3619 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3620
3621void
3622wait (...)
3623 CODE:
3624 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3625
3626void
3627try (SV *self)
3628 PPCODE:
3629{
3630 AV *av = (AV *)SvRV (self);
3631 SV *count_sv = AvARRAY (av)[0];
3632 IV count = SvIVX (count_sv);
3633
3634 if (count > 0)
3635 {
3636 --count;
3637 SvIVX (count_sv) = count;
3638 XSRETURN_YES;
3639 }
3640 else
3641 XSRETURN_NO;
3642}
3643
3644void
3645waiters (SV *self)
3646 PPCODE:
3647{
3648 AV *av = (AV *)SvRV (self);
3649 int wcount = AvFILLp (av) + 1 - 1;
3650
3651 if (GIMME_V == G_SCALAR)
3652 XPUSHs (sv_2mortal (newSViv (wcount)));
3653 else
3654 {
3655 int i;
3656 EXTEND (SP, wcount);
3657 for (i = 1; i <= wcount; ++i)
3658 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3659 }
3660}
3661
3662MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3663
3664void
3665_may_delete (SV *sem, int count, int extra_refs)
3666 PPCODE:
3667{
3668 AV *av = (AV *)SvRV (sem);
3669
3670 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3671 && AvFILLp (av) == 0 /* no waiters, just count */
3672 && SvIV (AvARRAY (av)[0]) == count)
3673 XSRETURN_YES;
3674
3675 XSRETURN_NO;
3676}
3677
3678MODULE = Coro::State PACKAGE = Coro::Signal
3679
3680SV *
3681new (SV *klass)
3682 CODE:
3683 RETVAL = sv_bless (
3684 coro_waitarray_new (aTHX_ 0),
3685 GvSTASH (CvGV (cv))
3686 );
3687 OUTPUT:
3688 RETVAL
3689
3690void
3691wait (...)
3692 CODE:
3693 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3694
3695void
3696broadcast (SV *self)
3697 CODE:
3698{
3699 AV *av = (AV *)SvRV (self);
3700 coro_signal_wake (aTHX_ av, AvFILLp (av));
3701}
3702
3703void
3704send (SV *self)
3705 CODE:
3706{
3707 AV *av = (AV *)SvRV (self);
3708
3709 if (AvFILLp (av))
3710 coro_signal_wake (aTHX_ av, 1);
3711 else
3712 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3713}
3714
3715IV
3716awaited (SV *self)
3717 CODE:
3718 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3719 OUTPUT:
3720 RETVAL
3721
3722
3723MODULE = Coro::State PACKAGE = Coro::AnyEvent
3724
3725BOOT:
3726 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3727
3728void
3729_schedule (...)
3730 CODE:
3731{
3732 static int incede;
3733
1090 api_cede (); 3734 api_cede_notself (aTHX);
1091 3735
3736 ++incede;
3737 while (coro_nready >= incede && api_cede (aTHX))
3738 ;
3739
3740 sv_setsv (sv_activity, &PL_sv_undef);
3741 if (coro_nready >= incede)
3742 {
3743 PUSHMARK (SP);
3744 PUTBACK;
3745 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3746 }
3747
3748 --incede;
3749}
3750
3751
3752MODULE = Coro::State PACKAGE = Coro::AIO
3753
3754void
3755_register (char *target, char *proto, SV *req)
3756 CODE:
3757{
3758 SV *req_cv = s_get_cv_croak (req);
3759 /* newXSproto doesn't return the CV on 5.8 */
3760 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3761 sv_setpv ((SV *)slf_cv, proto);
3762 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3763}
3764
3765MODULE = Coro::State PACKAGE = Coro::Select
3766
3767void
3768patch_pp_sselect ()
3769 CODE:
3770 if (!coro_old_pp_sselect)
3771 {
3772 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3773 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3774 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3775 }
3776
3777void
3778unpatch_pp_sselect ()
3779 CODE:
3780 if (coro_old_pp_sselect)
3781 {
3782 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3783 coro_old_pp_sselect = 0;
3784 }
3785
3786

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