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Comparing Coro/Coro/State.xs (file contents):
Revision 1.25 by root, Wed Aug 15 03:24:07 2001 UTC vs.
Revision 1.386 by root, Sat Feb 19 06:51:23 2011 UTC

1/* this works around a bug in mingw32 providing a non-working setjmp */
2#define USE_NO_MINGW_SETJMP_TWO_ARGS
3
4#define NDEBUG 1
5
6#include "libcoro/coro.c"
7
8#define PERL_NO_GET_CONTEXT
9#define PERL_EXT
10
1#include "EXTERN.h" 11#include "EXTERN.h"
2#include "perl.h" 12#include "perl.h"
3#include "XSUB.h" 13#include "XSUB.h"
14#include "perliol.h"
4 15
5#include "libcoro/coro.c" 16#include "schmorp.h"
6 17
7#include <signal.h> 18#include <stdio.h>
19#include <errno.h>
20#include <assert.h>
21
22#ifndef SVs_PADSTALE
23# define SVs_PADSTALE 0
24#endif
25
26#ifdef WIN32
27# undef setjmp
28# undef longjmp
29# undef _exit
30# define setjmp _setjmp /* deep magic */
31#else
32# include <inttypes.h> /* most portable stdint.h */
33#endif
8 34
9#ifdef HAVE_MMAP 35#ifdef HAVE_MMAP
10# include <unistd.h> 36# include <unistd.h>
11# include <sys/mman.h> 37# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 38# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 39# ifdef MAP_ANON
40# define MAP_ANONYMOUS MAP_ANON
15# else 41# else
16# undef HAVE_MMAP 42# undef HAVE_MMAP
17# endif 43# endif
18# endif 44# endif
45# include <limits.h>
46# ifndef PAGESIZE
47# define PAGESIZE pagesize
48# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
49static long pagesize;
50# else
51# define BOOT_PAGESIZE (void)0
52# endif
53#else
54# define PAGESIZE 0
55# define BOOT_PAGESIZE (void)0
19#endif 56#endif
20 57
21#define MAY_FLUSH /* increases codesize */ 58#if CORO_USE_VALGRIND
59# include <valgrind/valgrind.h>
60#endif
22 61
23#define SUB_INIT "Coro::State::initialize" 62/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 63static int cctx_max_idle = 4;
25 64
26/* The next macro should delcare a variable stacklevel that contains and approximation 65#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 66# undef CORO_STACKGUARD
28 * and should be unique. */ 67#endif
68
69#ifndef CORO_STACKGUARD
70# define CORO_STACKGUARD 0
71#endif
72
73/* prefer perl internal functions over our own? */
74#ifndef CORO_PREFER_PERL_FUNCTIONS
75# define CORO_PREFER_PERL_FUNCTIONS 0
76#endif
77
78/* The next macros try to return the current stack pointer, in an as
79 * portable way as possible. */
80#if __GNUC__ >= 4
81# define dSTACKLEVEL int stacklevel_dummy
82# define STACKLEVEL __builtin_frame_address (0)
83#else
84# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 85# define STACKLEVEL ((void *)&stacklevel)
86#endif
30 87
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 88#define IN_DESTRUCT PL_dirty
89
90#if __GNUC__ >= 3
91# define attribute(x) __attribute__(x)
92# define expect(expr,value) __builtin_expect ((expr), (value))
93# define INLINE static inline
94#else
95# define attribute(x)
96# define expect(expr,value) (expr)
97# define INLINE static
98#endif
99
100#define expect_false(expr) expect ((expr) != 0, 0)
101#define expect_true(expr) expect ((expr) != 0, 1)
102
103#define NOINLINE attribute ((noinline))
32 104
33#include "CoroAPI.h" 105#include "CoroAPI.h"
106#define GCoroAPI (&coroapi) /* very sneaky */
34 107
108#ifdef USE_ITHREADS
109# if CORO_PTHREAD
110static void *coro_thx;
111# endif
112#endif
113
114#ifdef __linux
115# include <time.h> /* for timespec */
116# include <syscall.h> /* for SYS_* */
117# ifdef SYS_clock_gettime
118# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
119# define CORO_CLOCK_MONOTONIC 1
120# define CORO_CLOCK_THREAD_CPUTIME_ID 3
121# endif
122#endif
123
124static double (*nvtime)(); /* so why doesn't it take void? */
125static void (*u2time)(pTHX_ UV ret[2]);
126
127/* we hijack an hopefully unused CV flag for our purposes */
128#define CVf_SLF 0x4000
129static OP *pp_slf (pTHX);
130
131static U32 cctx_gen;
132static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 133static struct CoroAPI coroapi;
134static AV *main_mainstack; /* used to differentiate between $main and others */
135static JMPENV *main_top_env;
136static HV *coro_state_stash, *coro_stash;
137static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
36 138
37/* this is actually not only the c stack but also c registers etc... */ 139static AV *av_destroy; /* destruction queue */
140static SV *sv_manager; /* the manager coro */
141static SV *sv_idle; /* $Coro::idle */
142
143static GV *irsgv; /* $/ */
144static GV *stdoutgv; /* *STDOUT */
145static SV *rv_diehook;
146static SV *rv_warnhook;
147static HV *hv_sig; /* %SIG */
148
149/* async_pool helper stuff */
150static SV *sv_pool_rss;
151static SV *sv_pool_size;
152static SV *sv_async_pool_idle; /* description string */
153static AV *av_async_pool; /* idle pool */
154static SV *sv_Coro; /* class string */
155static CV *cv_pool_handler;
156
157/* Coro::AnyEvent */
158static SV *sv_activity;
159
160/* enable processtime/realtime profiling */
161static char enable_times;
162typedef U32 coro_ts[2];
163static coro_ts time_real, time_cpu;
164static char times_valid;
165
166static struct coro_cctx *cctx_first;
167static int cctx_count, cctx_idle;
168
169enum {
170 CC_MAPPED = 0x01,
171 CC_NOREUSE = 0x02, /* throw this away after tracing */
172 CC_TRACE = 0x04,
173 CC_TRACE_SUB = 0x08, /* trace sub calls */
174 CC_TRACE_LINE = 0x10, /* trace each statement */
175 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
176};
177
178/* this is a structure representing a c-level coroutine */
38typedef struct { 179typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 180{
40 int usecnt; /* shared by how many coroutines */ 181 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 182
183 /* the stack */
184 void *sptr;
185 size_t ssize;
186
187 /* cpu state */
188 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
189 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
190 JMPENV *top_env;
43 coro_context cctx; 191 coro_context cctx;
44 192
45 void *sptr; 193 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 194#if CORO_USE_VALGRIND
47} coro_stack; 195 int valgrind_id;
196#endif
197 unsigned char flags;
198} coro_cctx;
48 199
200coro_cctx *cctx_current; /* the currently running cctx */
201
202/*****************************************************************************/
203
204enum {
205 CF_RUNNING = 0x0001, /* coroutine is running */
206 CF_READY = 0x0002, /* coroutine is ready */
207 CF_NEW = 0x0004, /* has never been switched to */
208 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
209 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
210};
211
212/* the structure where most of the perl state is stored, overlaid on the cxstack */
213typedef struct
214{
215 SV *defsv;
216 AV *defav;
217 SV *errsv;
218 SV *irsgv;
219 HV *hinthv;
220#define VAR(name,type) type name;
221# include "state.h"
222#undef VAR
223} perl_slots;
224
225#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
226
227/* this is a structure representing a perl-level coroutine */
49struct coro { 228struct coro {
50 /* the optional C context */ 229 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 230 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 231
55 /* optionally saved, might be zero */ 232 /* ready queue */
56 AV *defav; 233 struct coro *next_ready;
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63 234
64 /* the stacks and related info (callchain etc..) */ 235 /* state data */
65 PERL_SI *curstackinfo; 236 struct CoroSLF slf_frame; /* saved slf frame */
66 AV *curstack;
67 AV *mainstack; 237 AV *mainstack;
68 SV **stack_sp; 238 perl_slots *slot; /* basically the saved sp */
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 239
240 CV *startcv; /* the CV to execute */
92 /* data associated with this coroutine (initial args) */ 241 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 242 int refcnt; /* coroutines are refcounted, yes */
243 int flags; /* CF_ flags */
244 HV *hv; /* the perl hash associated with this coro, if any */
245 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
246
247 /* statistics */
248 int usecount; /* number of transfers to this coro */
249
250 /* coro process data */
251 int prio;
252 SV *except; /* exception to be thrown */
253 SV *rouse_cb;
254
255 /* async_pool */
256 SV *saved_deffh;
257 SV *invoke_cb;
258 AV *invoke_av;
259
260 /* on_enter/on_leave */
261 AV *on_enter;
262 AV *on_leave;
263
264 /* swap_sv */
265 AV *swap_sv;
266
267 /* times */
268 coro_ts t_cpu, t_real;
269
270 /* linked list */
271 struct coro *next, *prev;
94}; 272};
95 273
96typedef struct coro *Coro__State; 274typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 275typedef struct coro *Coro__State_or_hashref;
98 276
99static AV *main_mainstack; /* used to differentiate between $main and others */ 277/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 278/* and get copied between struct coro and these variables */
279/* the mainr easonw e don't support windows process emulation */
280static struct CoroSLF slf_frame; /* the current slf frame */
281
282/** Coro ********************************************************************/
283
284#define CORO_PRIO_MAX 3
285#define CORO_PRIO_HIGH 1
286#define CORO_PRIO_NORMAL 0
287#define CORO_PRIO_LOW -1
288#define CORO_PRIO_IDLE -3
289#define CORO_PRIO_MIN -4
290
291/* for Coro.pm */
292static SV *coro_current;
293static SV *coro_readyhook;
294static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
295static CV *cv_coro_run, *cv_coro_terminate;
296static struct coro *coro_first;
297#define coro_nready coroapi.nready
298
299/** Coro::Select ************************************************************/
300
301static OP *(*coro_old_pp_sselect) (pTHX);
101static SV *ucoro_state_sv; 302static SV *coro_select_select;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104 303
105/* mostly copied from op.c:cv_clone2 */ 304/* horrible hack, but if it works... */
106STATIC AV * 305static OP *
107clone_padlist (AV *protopadlist) 306coro_pp_sselect (pTHX)
108{ 307{
109 AV *av; 308 dSP;
110 I32 ix; 309 PUSHMARK (SP - 4); /* fake argument list */
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 310 XPUSHs (coro_select_select);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 311 PUTBACK;
113 SV **pname = AvARRAY (protopad_name); 312
114 SV **ppad = AvARRAY (protopad); 313 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
115 I32 fname = AvFILLp (protopad_name); 314 PL_op->op_flags |= OPf_STACKED;
116 I32 fpad = AvFILLp (protopad); 315 PL_op->op_private = 0;
316 return PL_ppaddr [OP_ENTERSUB](aTHX);
317}
318
319/** time stuff **************************************************************/
320
321#ifdef HAS_GETTIMEOFDAY
322
323static void
324coro_u2time (aTHX_ UV ret[2])
325{
326 struct timeval tv;
327 gettimeofday (&tv, 0);
328
329 ret [0] = tv.tv_sec;
330 ret [1] = tv.tv_usec;
331}
332
333static double
334coro_nvtime ()
335{
336 struct timeval tv;
337 gettimeofday (&tv, 0);
338
339 return tv.tv_sec + tv.tv_usec * 1e-6;
340}
341
342static void
343time_init (void)
344{
345 nvtime = coro_nvtime;
346 u2time = coro_u2time;
347}
348
349#else
350
351static void
352time_init (void)
353{
354 SV **svp;
355
356 require_pv ("Time::HiRes");
357
358 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
359
360 if (!svp) croak ("Time::HiRes is required");
361 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
362
363 nvtime = INT2PTR (double (*)(), SvIV (*svp));
364
365 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
366 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
367}
368
369#endif
370
371/** lowlevel stuff **********************************************************/
372
373static SV *
374coro_get_sv (pTHX_ const char *name, int create)
375{
376#if PERL_VERSION_ATLEAST (5,10,0)
377 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
378 get_sv (name, create);
379#endif
380 return get_sv (name, create);
381}
382
383static AV *
384coro_get_av (pTHX_ const char *name, int create)
385{
386#if PERL_VERSION_ATLEAST (5,10,0)
387 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
388 get_av (name, create);
389#endif
390 return get_av (name, create);
391}
392
393static HV *
394coro_get_hv (pTHX_ const char *name, int create)
395{
396#if PERL_VERSION_ATLEAST (5,10,0)
397 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
398 get_hv (name, create);
399#endif
400 return get_hv (name, create);
401}
402
403INLINE void
404coro_times_update ()
405{
406#ifdef coro_clock_gettime
407 struct timespec ts;
408
409 ts.tv_sec = ts.tv_nsec = 0;
410 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
411 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
412
413 ts.tv_sec = ts.tv_nsec = 0;
414 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
415 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
416#else
417 dTHX;
418 UV tv[2];
419
420 u2time (aTHX_ tv);
421 time_real [0] = tv [0];
422 time_real [1] = tv [1] * 1000;
423#endif
424}
425
426INLINE void
427coro_times_add (struct coro *c)
428{
429 c->t_real [1] += time_real [1];
430 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
431 c->t_real [0] += time_real [0];
432
433 c->t_cpu [1] += time_cpu [1];
434 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
435 c->t_cpu [0] += time_cpu [0];
436}
437
438INLINE void
439coro_times_sub (struct coro *c)
440{
441 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
442 c->t_real [1] -= time_real [1];
443 c->t_real [0] -= time_real [0];
444
445 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
446 c->t_cpu [1] -= time_cpu [1];
447 c->t_cpu [0] -= time_cpu [0];
448}
449
450/*****************************************************************************/
451/* magic glue */
452
453#define CORO_MAGIC_type_cv 26
454#define CORO_MAGIC_type_state PERL_MAGIC_ext
455
456#define CORO_MAGIC_NN(sv, type) \
457 (expect_true (SvMAGIC (sv)->mg_type == type) \
458 ? SvMAGIC (sv) \
459 : mg_find (sv, type))
460
461#define CORO_MAGIC(sv, type) \
462 (expect_true (SvMAGIC (sv)) \
463 ? CORO_MAGIC_NN (sv, type) \
464 : 0)
465
466#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
467#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
468
469INLINE struct coro *
470SvSTATE_ (pTHX_ SV *coro)
471{
472 HV *stash;
473 MAGIC *mg;
474
475 if (SvROK (coro))
476 coro = SvRV (coro);
477
478 if (expect_false (SvTYPE (coro) != SVt_PVHV))
479 croak ("Coro::State object required");
480
481 stash = SvSTASH (coro);
482 if (expect_false (stash != coro_stash && stash != coro_state_stash))
483 {
484 /* very slow, but rare, check */
485 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
486 croak ("Coro::State object required");
487 }
488
489 mg = CORO_MAGIC_state (coro);
490 return (struct coro *)mg->mg_ptr;
491}
492
493#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
494
495/* faster than SvSTATE, but expects a coroutine hv */
496#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
497#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
498
499/*****************************************************************************/
500/* padlist management and caching */
501
502static AV *
503coro_derive_padlist (pTHX_ CV *cv)
504{
505 AV *padlist = CvPADLIST (cv);
117 AV *newpadlist, *newpad_name, *newpad; 506 AV *newpadlist, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127 507
128 newpadlist = newAV (); 508 newpadlist = newAV ();
129 AvREAL_off (newpadlist); 509 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name); 510#if PERL_VERSION_ATLEAST (5,10,0)
511 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
512#else
513 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
514#endif
515 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
516 --AvFILLp (padlist);
517
518 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
131 av_store (newpadlist, 1, (SV *) newpad); 519 av_store (newpadlist, 1, (SV *)newpad);
132 520
133 av = newAV (); /* will be @_ */ 521 return newpadlist;
134 av_extend (av, 0); 522}
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137 523
138 for (ix = fpad; ix > 0; ix--) 524static void
525free_padlist (pTHX_ AV *padlist)
526{
527 /* may be during global destruction */
528 if (!IN_DESTRUCT)
139 { 529 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 530 I32 i = AvFILLp (padlist);
141 if (namesv && namesv != &PL_sv_undef) 531
532 while (i > 0) /* special-case index 0 */
142 { 533 {
143 char *name = SvPVX (namesv); /* XXX */ 534 /* we try to be extra-careful here */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 535 AV *av = (AV *)AvARRAY (padlist)[i--];
145 { /* lexical from outside? */ 536 I32 j = AvFILLp (av);
146 npad[ix] = SvREFCNT_inc (ppad[ix]); 537
147 } 538 while (j >= 0)
148 else 539 SvREFCNT_dec (AvARRAY (av)[j--]);
149 { /* our own lexical */ 540
150 SV *sv; 541 AvFILLp (av) = -1;
151 if (*name == '&') 542 SvREFCNT_dec (av);
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 } 543 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 544
165 { 545 SvREFCNT_dec (AvARRAY (padlist)[0]);
166 npad[ix] = SvREFCNT_inc (ppad[ix]); 546
167 } 547 AvFILLp (padlist) = -1;
548 SvREFCNT_dec ((SV*)padlist);
549 }
550}
551
552static int
553coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
554{
555 AV *padlist;
556 AV *av = (AV *)mg->mg_obj;
557
558 /* perl manages to free our internal AV and _then_ call us */
559 if (IN_DESTRUCT)
560 return 0;
561
562 /* casting is fun. */
563 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
564 free_padlist (aTHX_ padlist);
565
566 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
567
568 return 0;
569}
570
571static MGVTBL coro_cv_vtbl = {
572 0, 0, 0, 0,
573 coro_cv_free
574};
575
576/* the next two functions merely cache the padlists */
577static void
578get_padlist (pTHX_ CV *cv)
579{
580 MAGIC *mg = CORO_MAGIC_cv (cv);
581 AV *av;
582
583 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
584 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
168 else 585 else
169 { 586 {
170 SV *sv = NEWSV (0, 0); 587#if CORO_PREFER_PERL_FUNCTIONS
171 SvPADTMP_on (sv); 588 /* this is probably cleaner? but also slower! */
172 npad[ix] = sv; 589 /* in practise, it seems to be less stable */
173 } 590 CV *cp = Perl_cv_clone (aTHX_ cv);
174 } 591 CvPADLIST (cv) = CvPADLIST (cp);
175 592 CvPADLIST (cp) = 0;
176#if 0 /* return -ENOTUNDERSTOOD */ 593 SvREFCNT_dec (cp);
177 /* Now that vars are all in place, clone nested closures. */ 594#else
178 595 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif 596#endif
195 597 }
196 return newpadlist;
197} 598}
198 599
199#ifdef MAY_FLUSH 600static void
200STATIC AV * 601put_padlist (pTHX_ CV *cv)
201free_padlist (AV *padlist)
202{ 602{
203 /* may be during global destruction */ 603 MAGIC *mg = CORO_MAGIC_cv (cv);
204 if (SvREFCNT(padlist)) 604 AV *av;
605
606 if (expect_false (!mg))
607 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
608
609 av = (AV *)mg->mg_obj;
610
611 if (expect_false (AvFILLp (av) >= AvMAX (av)))
612 av_extend (av, AvFILLp (av) + 1);
613
614 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
615}
616
617/** load & save, init *******************************************************/
618
619/* swap sv heads, at least logically */
620static void
621swap_svs (pTHX_ Coro__State c)
622{
623 int i;
624
625 for (i = 0; i <= AvFILLp (c->swap_sv); )
205 { 626 {
206 I32 i = AvFILLp(padlist); 627 SV *a = AvARRAY (c->swap_sv)[i++];
207 while (i >= 0) 628 SV *b = AvARRAY (c->swap_sv)[i++];
629
630 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
631 SV tmp;
632
633 /* swap sv_any */
634 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
635
636 /* swap sv_flags */
637 SvFLAGS (&tmp) = SvFLAGS (a);
638 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
639 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
640
641#if PERL_VERSION_ATLEAST (5,10,0)
642 /* perl 5.10 complicates this _quite_ a bit, but it also is
643 * much faster, so no quarrels here. alternatively, we could
644 * sv_upgrade to avoid this.
645 */
208 { 646 {
209 SV **svp = av_fetch(padlist, i--, FALSE); 647 /* swap sv_u */
210 SV *sv = svp ? *svp : Nullsv; 648 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
211 if (sv) 649
212 SvREFCNT_dec(sv); 650 /* if SvANY points to the head, we need to adjust the pointers,
651 * as the pointer for a still points to b, and maybe vice versa.
652 */
653 #define svany_in_head(type) \
654 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
655
656 if (svany_in_head (SvTYPE (a)))
657 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
658
659 if (svany_in_head (SvTYPE (b)))
660 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
213 } 661 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif 662#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 { 663 }
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244} 664}
245 665
246#ifdef MAY_FLUSH 666#define SWAP_SVS(coro) \
247STATIC void 667 if (expect_false ((coro)->swap_sv)) \
248flush_padlist_cache () 668 swap_svs (aTHX_ (coro))
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252 669
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
276#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void 670static void
671on_enterleave_call (pTHX_ SV *cb);
672
673static void
281load_state(pTHX_ Coro__State c) 674load_perl (pTHX_ Coro__State c)
282{ 675{
283 PL_dowarn = c->dowarn; 676 perl_slots *slot = c->slot;
284 PL_in_eval = c->in_eval; 677 c->slot = 0;
285 678
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack; 679 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312 680
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 681 GvSV (PL_defgv) = slot->defsv;
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 682 GvAV (PL_defgv) = slot->defav;
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 683 GvSV (PL_errgv) = slot->errsv;
684 GvSV (irsgv) = slot->irsgv;
685 GvHV (PL_hintgv) = slot->hinthv;
686
687 #define VAR(name,type) PL_ ## name = slot->name;
688 # include "state.h"
689 #undef VAR
316 690
317 { 691 {
318 dSP; 692 dSP;
693
319 CV *cv; 694 CV *cv;
320 695
321 /* now do the ugly restore mess */ 696 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs)) 697 while (expect_true (cv = (CV *)POPs))
323 { 698 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */ 699 put_padlist (aTHX_ cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist; 700 CvDEPTH (cv) = PTR2IV (POPs);
330#ifdef USE_THREADS 701 CvPADLIST (cv) = (AV *)POPs;
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 } 702 }
337 703
338 PUTBACK; 704 PUTBACK;
339 } 705 }
340}
341 706
707 slf_frame = c->slf_frame;
708 CORO_THROW = c->except;
709
710 if (expect_false (enable_times))
711 {
712 if (expect_false (!times_valid))
713 coro_times_update ();
714
715 coro_times_sub (c);
716 }
717
718 if (expect_false (c->on_enter))
719 {
720 int i;
721
722 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
723 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
724 }
725
726 SWAP_SVS (c);
727}
728
342static void 729static void
343save_state(pTHX_ Coro__State c, int flags) 730save_perl (pTHX_ Coro__State c)
344{ 731{
732 SWAP_SVS (c);
733
734 if (expect_false (c->on_leave))
735 {
736 int i;
737
738 for (i = AvFILLp (c->on_leave); i >= 0; --i)
739 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
740 }
741
742 times_valid = 0;
743
744 if (expect_false (enable_times))
745 {
746 coro_times_update (); times_valid = 1;
747 coro_times_add (c);
748 }
749
750 c->except = CORO_THROW;
751 c->slf_frame = slf_frame;
752
345 { 753 {
346 dSP; 754 dSP;
347 I32 cxix = cxstack_ix; 755 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack; 756 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo; 757 PERL_SI *top_si = PL_curstackinfo;
… …
351 /* 759 /*
352 * the worst thing you can imagine happens first - we have to save 760 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :( 761 * (and reinitialize) all cv's in the whole callchain :(
354 */ 762 */
355 763
356 PUSHs (Nullsv); 764 XPUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 765 /* this loop was inspired by pp_caller */
358 for (;;) 766 for (;;)
359 { 767 {
360 do 768 while (expect_true (cxix >= 0))
361 { 769 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 770 PERL_CONTEXT *cx = &ccstk[cxix--];
363 771
364 if (CxTYPE(cx) == CXt_SUB) 772 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
365 { 773 {
366 CV *cv = cx->blk_sub.cv; 774 CV *cv = cx->blk_sub.cv;
775
367 if (CvDEPTH(cv)) 776 if (expect_true (CvDEPTH (cv)))
368 { 777 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2); 778 EXTEND (SP, 3);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv)); 779 PUSHs ((SV *)CvPADLIST (cv));
780 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
384 PUSHs ((SV *)cv); 781 PUSHs ((SV *)cv);
385 782
386 get_padlist (cv); /* this is a monster */ 783 CvDEPTH (cv) = 0;
784 get_padlist (aTHX_ cv);
387 } 785 }
388 } 786 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 } 787 }
396 while (cxix >= 0);
397 788
398 if (top_si->si_type == PERLSI_MAIN) 789 if (expect_true (top_si->si_type == PERLSI_MAIN))
399 break; 790 break;
400 791
401 top_si = top_si->si_prev; 792 top_si = top_si->si_prev;
402 ccstk = top_si->si_cxstack; 793 ccstk = top_si->si_cxstack;
403 cxix = top_si->si_cxix; 794 cxix = top_si->si_cxix;
404 } 795 }
405 796
406 PUTBACK; 797 PUTBACK;
407 } 798 }
408 799
409 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 800 /* allocate some space on the context stack for our purposes */
410 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 801 /* we manually unroll here, as usually 2 slots is enough */
411 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 802 if (SLOT_COUNT >= 1) CXINC;
803 if (SLOT_COUNT >= 2) CXINC;
804 if (SLOT_COUNT >= 3) CXINC;
805 {
806 unsigned int i;
807 for (i = 3; i < SLOT_COUNT; ++i)
808 CXINC;
809 }
810 cxstack_ix -= SLOT_COUNT; /* undo allocation */
412 811
413 /* I have not the slightest idea of why av_reify is necessary */
414 /* but if it's missing the defav contents magically get replaced sometimes */
415 if (c->defav)
416 av_reify (c->defav);
417
418 c->dowarn = PL_dowarn;
419 c->in_eval = PL_in_eval;
420
421 c->curstackinfo = PL_curstackinfo;
422 c->curstack = PL_curstack;
423 c->mainstack = PL_mainstack; 812 c->mainstack = PL_mainstack;
424 c->stack_sp = PL_stack_sp; 813
425 c->op = PL_op; 814 {
426 c->curpad = PL_curpad; 815 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
427 c->stack_base = PL_stack_base; 816
428 c->stack_max = PL_stack_max; 817 slot->defav = GvAV (PL_defgv);
429 c->tmps_stack = PL_tmps_stack; 818 slot->defsv = DEFSV;
430 c->tmps_floor = PL_tmps_floor; 819 slot->errsv = ERRSV;
431 c->tmps_ix = PL_tmps_ix; 820 slot->irsgv = GvSV (irsgv);
432 c->tmps_max = PL_tmps_max; 821 slot->hinthv = GvHV (PL_hintgv);
433 c->markstack = PL_markstack; 822
434 c->markstack_ptr = PL_markstack_ptr; 823 #define VAR(name,type) slot->name = PL_ ## name;
435 c->markstack_max = PL_markstack_max; 824 # include "state.h"
436 c->scopestack = PL_scopestack; 825 #undef VAR
437 c->scopestack_ix = PL_scopestack_ix; 826 }
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} 827}
448 828
449/* 829/*
450 * allocate various perl stacks. This is an exact copy 830 * allocate various perl stacks. This is almost an exact copy
451 * of perl.c:init_stacks, except that it uses less memory 831 * of perl.c:init_stacks, except that it uses less memory
452 * on the assumption that coroutines do not usually need 832 * on the (sometimes correct) assumption that coroutines do
453 * a lot of stackspace. 833 * not usually need a lot of stackspace.
454 */ 834 */
455STATIC void 835#if CORO_PREFER_PERL_FUNCTIONS
836# define coro_init_stacks(thx) init_stacks ()
837#else
838static void
456coro_init_stacks (pTHX) 839coro_init_stacks (pTHX)
457{ 840{
458 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 841 PL_curstackinfo = new_stackinfo(32, 8);
459 PL_curstackinfo->si_type = PERLSI_MAIN; 842 PL_curstackinfo->si_type = PERLSI_MAIN;
460 PL_curstack = PL_curstackinfo->si_stack; 843 PL_curstack = PL_curstackinfo->si_stack;
461 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 844 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462 845
463 PL_stack_base = AvARRAY(PL_curstack); 846 PL_stack_base = AvARRAY(PL_curstack);
464 PL_stack_sp = PL_stack_base; 847 PL_stack_sp = PL_stack_base;
465 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 848 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466 849
467 New(50,PL_tmps_stack,96,SV*); 850 New(50,PL_tmps_stack,32,SV*);
468 PL_tmps_floor = -1; 851 PL_tmps_floor = -1;
469 PL_tmps_ix = -1; 852 PL_tmps_ix = -1;
470 PL_tmps_max = 96; 853 PL_tmps_max = 32;
471 854
472 New(54,PL_markstack,16,I32); 855 New(54,PL_markstack,16,I32);
473 PL_markstack_ptr = PL_markstack; 856 PL_markstack_ptr = PL_markstack;
474 PL_markstack_max = PL_markstack + 16; 857 PL_markstack_max = PL_markstack + 16;
475 858
859#ifdef SET_MARK_OFFSET
476 SET_MARK_OFFSET; 860 SET_MARK_OFFSET;
861#endif
477 862
478 New(54,PL_scopestack,16,I32); 863 New(54,PL_scopestack,8,I32);
479 PL_scopestack_ix = 0; 864 PL_scopestack_ix = 0;
480 PL_scopestack_max = 16; 865 PL_scopestack_max = 8;
481 866
482 New(54,PL_savestack,96,ANY); 867 New(54,PL_savestack,24,ANY);
483 PL_savestack_ix = 0; 868 PL_savestack_ix = 0;
484 PL_savestack_max = 96; 869 PL_savestack_max = 24;
485 870
871#if !PERL_VERSION_ATLEAST (5,10,0)
486 New(54,PL_retstack,8,OP*); 872 New(54,PL_retstack,4,OP*);
487 PL_retstack_ix = 0; 873 PL_retstack_ix = 0;
488 PL_retstack_max = 8; 874 PL_retstack_max = 4;
875#endif
489} 876}
877#endif
490 878
491/* 879/*
492 * destroy the stacks, the callchain etc... 880 * destroy the stacks, the callchain etc...
493 * still there is a memleak of 128 bytes...
494 */ 881 */
495STATIC void 882static void
496destroy_stacks(pTHX) 883coro_destruct_stacks (pTHX)
497{ 884{
498 /* is this ugly, I ask? */
499 while (PL_scopestack_ix)
500 LEAVE;
501
502 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS;
505
506 while (PL_curstackinfo->si_next) 885 while (PL_curstackinfo->si_next)
507 PL_curstackinfo = PL_curstackinfo->si_next; 886 PL_curstackinfo = PL_curstackinfo->si_next;
508 887
509 while (PL_curstackinfo) 888 while (PL_curstackinfo)
510 { 889 {
511 PERL_SI *p = PL_curstackinfo->si_prev; 890 PERL_SI *p = PL_curstackinfo->si_prev;
512 891
513 { 892 if (!IN_DESTRUCT)
514 dSP;
515 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516 PUTBACK; /* possibly superfluous */
517 }
518
519 if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
520 dounwind(-1);
521
522 SvREFCNT_dec(PL_curstackinfo->si_stack); 893 SvREFCNT_dec (PL_curstackinfo->si_stack);
894
523 Safefree(PL_curstackinfo->si_cxstack); 895 Safefree (PL_curstackinfo->si_cxstack);
524 Safefree(PL_curstackinfo); 896 Safefree (PL_curstackinfo);
525 PL_curstackinfo = p; 897 PL_curstackinfo = p;
526 } 898 }
527 899
528 Safefree(PL_tmps_stack); 900 Safefree (PL_tmps_stack);
529 Safefree(PL_markstack); 901 Safefree (PL_markstack);
530 Safefree(PL_scopestack); 902 Safefree (PL_scopestack);
531 Safefree(PL_savestack); 903 Safefree (PL_savestack);
904#if !PERL_VERSION_ATLEAST (5,10,0)
532 Safefree(PL_retstack); 905 Safefree (PL_retstack);
533}
534
535static void
536allocate_stack (Coro__State ctx, int alloc)
537{
538 coro_stack *stack;
539
540 New (0, stack, 1, coro_stack);
541
542 stack->refcnt = 1;
543 stack->usecnt = 1;
544 stack->gencnt = ctx->gencnt = 0;
545 if (alloc)
546 {
547#ifdef HAVE_MMAP
548 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
550 if (stack->sptr == (void *)-1)
551#endif 906#endif
907}
908
909#define CORO_RSS \
910 rss += sizeof (SYM (curstackinfo)); \
911 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
912 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
913 rss += SYM (tmps_max) * sizeof (SV *); \
914 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
915 rss += SYM (scopestack_max) * sizeof (I32); \
916 rss += SYM (savestack_max) * sizeof (ANY);
917
918static size_t
919coro_rss (pTHX_ struct coro *coro)
920{
921 size_t rss = sizeof (*coro);
922
923 if (coro->mainstack)
924 {
925 if (coro->flags & CF_RUNNING)
552 { 926 {
553 /*FIXME*//*D*//* reasonable stack size! */ 927 #define SYM(sym) PL_ ## sym
554 stack->ssize = -4096 * sizeof (long); 928 CORO_RSS;
555 New (0, stack->sptr, 4096, long); 929 #undef SYM
556 } 930 }
557 }
558 else 931 else
559 stack->sptr = 0;
560
561 ctx->stack = stack;
562}
563
564static void
565deallocate_stack (Coro__State ctx)
566{
567 coro_stack *stack = ctx->stack;
568
569 ctx->stack = 0;
570
571 if (stack)
572 {
573 if (!--stack->refcnt)
574 { 932 {
575#ifdef HAVE_MMAP 933 #define SYM(sym) coro->slot->sym
576 if (stack->ssize > 0 && stack->sptr) 934 CORO_RSS;
577 munmap (stack->sptr, stack->ssize); 935 #undef SYM
578 else 936 }
579#else 937 }
580 Safefree (stack->sptr); 938
939 return rss;
940}
941
942/** coroutine stack handling ************************************************/
943
944static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
945static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
946static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
947
948/* apparently < 5.8.8 */
949#ifndef MgPV_nolen_const
950#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
951 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
952 (const char*)(mg)->mg_ptr)
581#endif 953#endif
582 Safefree (stack); 954
955/*
956 * This overrides the default magic get method of %SIG elements.
957 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
958 * and instead of trying to save and restore the hash elements, we just provide
959 * readback here.
960 */
961static int
962coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
963{
964 const char *s = MgPV_nolen_const (mg);
965
966 if (*s == '_')
967 {
968 SV **svp = 0;
969
970 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
971 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
972
973 if (svp)
974 {
975 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
976 return 0;
583 } 977 }
584 else if (ctx->gencnt == stack->gencnt) 978 }
585 --stack->usecnt; 979
980 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
981}
982
983static int
984coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
985{
986 const char *s = MgPV_nolen_const (mg);
987
988 if (*s == '_')
586 } 989 {
587} 990 SV **svp = 0;
588 991
992 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
993 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
994
995 if (svp)
996 {
997 SV *old = *svp;
998 *svp = 0;
999 SvREFCNT_dec (old);
1000 return 0;
1001 }
1002 }
1003
1004 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1005}
1006
589static void 1007static int
590setup_coro (void *arg) 1008coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1009{
1010 const char *s = MgPV_nolen_const (mg);
1011
1012 if (*s == '_')
1013 {
1014 SV **svp = 0;
1015
1016 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1017 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1018
1019 if (svp)
1020 {
1021 SV *old = *svp;
1022 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1023 SvREFCNT_dec (old);
1024 return 0;
1025 }
1026 }
1027
1028 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1029}
1030
1031static void
1032prepare_nop (pTHX_ struct coro_transfer_args *ta)
1033{
1034 /* kind of mega-hacky, but works */
1035 ta->next = ta->prev = (struct coro *)ta;
1036}
1037
1038static int
1039slf_check_nop (pTHX_ struct CoroSLF *frame)
1040{
1041 return 0;
1042}
1043
1044static int
1045slf_check_repeat (pTHX_ struct CoroSLF *frame)
1046{
1047 return 1;
1048}
1049
1050static UNOP init_perl_op;
1051
1052static void NOINLINE /* noinline to keep it out of the transfer fast path */
1053init_perl (pTHX_ struct coro *coro)
591{ 1054{
592 /* 1055 /*
593 * emulate part of the perl startup here. 1056 * emulate part of the perl startup here.
594 */ 1057 */
1058 coro_init_stacks (aTHX);
1059
1060 PL_runops = RUNOPS_DEFAULT;
1061 PL_curcop = &PL_compiling;
1062 PL_in_eval = EVAL_NULL;
1063 PL_comppad = 0;
1064 PL_comppad_name = 0;
1065 PL_comppad_name_fill = 0;
1066 PL_comppad_name_floor = 0;
1067 PL_curpm = 0;
1068 PL_curpad = 0;
1069 PL_localizing = 0;
1070 PL_restartop = 0;
1071#if PERL_VERSION_ATLEAST (5,10,0)
1072 PL_parser = 0;
1073#endif
1074 PL_hints = 0;
1075
1076 /* recreate the die/warn hooks */
1077 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1078 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1079
1080 GvSV (PL_defgv) = newSV (0);
1081 GvAV (PL_defgv) = coro->args; coro->args = 0;
1082 GvSV (PL_errgv) = newSV (0);
1083 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1084 GvHV (PL_hintgv) = 0;
1085 PL_rs = newSVsv (GvSV (irsgv));
1086 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1087
1088 {
1089 dSP;
1090 UNOP myop;
1091
1092 Zero (&myop, 1, UNOP);
1093 myop.op_next = Nullop;
1094 myop.op_type = OP_ENTERSUB;
1095 myop.op_flags = OPf_WANT_VOID;
1096
1097 PUSHMARK (SP);
1098 PUSHs ((SV *)coro->startcv);
1099 PUTBACK;
1100 PL_op = (OP *)&myop;
1101 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1102 }
1103
1104 /* this newly created coroutine might be run on an existing cctx which most
1105 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1106 */
1107 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1108 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1109
1110 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1111 init_perl_op.op_next = PL_op;
1112 init_perl_op.op_type = OP_ENTERSUB;
1113 init_perl_op.op_ppaddr = pp_slf;
1114 /* no flags etc. required, as an init function won't be called */
1115
1116 PL_op = (OP *)&init_perl_op;
1117
1118 /* copy throw, in case it was set before init_perl */
1119 CORO_THROW = coro->except;
1120
1121 SWAP_SVS (coro);
1122
1123 if (expect_false (enable_times))
1124 {
1125 coro_times_update ();
1126 coro_times_sub (coro);
1127 }
1128}
1129
1130static void
1131coro_unwind_stacks (pTHX)
1132{
1133 if (!IN_DESTRUCT)
1134 {
1135 /* restore all saved variables and stuff */
1136 LEAVE_SCOPE (0);
1137 assert (PL_tmps_floor == -1);
1138
1139 /* free all temporaries */
1140 FREETMPS;
1141 assert (PL_tmps_ix == -1);
1142
1143 /* unwind all extra stacks */
1144 POPSTACK_TO (PL_mainstack);
1145
1146 /* unwind main stack */
1147 dounwind (-1);
1148 }
1149}
1150
1151static void
1152destroy_perl (pTHX_ struct coro *coro)
1153{
1154 SV *svf [9];
1155
1156 {
1157 struct coro *current = SvSTATE_current;
1158
1159 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1160
1161 save_perl (aTHX_ current);
1162 load_perl (aTHX_ coro);
1163
1164 coro_unwind_stacks (aTHX);
1165 coro_destruct_stacks (aTHX);
1166
1167 /* restore swapped sv's */
1168 SWAP_SVS (coro);
1169
1170 // now save some sv's to be free'd later
1171 svf [0] = GvSV (PL_defgv);
1172 svf [1] = (SV *)GvAV (PL_defgv);
1173 svf [2] = GvSV (PL_errgv);
1174 svf [3] = (SV *)PL_defoutgv;
1175 svf [4] = PL_rs;
1176 svf [5] = GvSV (irsgv);
1177 svf [6] = (SV *)GvHV (PL_hintgv);
1178 svf [7] = PL_diehook;
1179 svf [8] = PL_warnhook;
1180 assert (9 == sizeof (svf) / sizeof (*svf));
1181
1182 load_perl (aTHX_ current);
1183 }
1184
1185 {
1186 unsigned int i;
1187
1188 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1189 SvREFCNT_dec (svf [i]);
1190
1191 SvREFCNT_dec (coro->saved_deffh);
1192 SvREFCNT_dec (coro->rouse_cb);
1193 SvREFCNT_dec (coro->invoke_cb);
1194 SvREFCNT_dec (coro->invoke_av);
1195 }
1196}
1197
1198INLINE void
1199free_coro_mortal (pTHX)
1200{
1201 if (expect_true (coro_mortal))
1202 {
1203 SvREFCNT_dec (coro_mortal);
1204 coro_mortal = 0;
1205 }
1206}
1207
1208static int
1209runops_trace (pTHX)
1210{
1211 COP *oldcop = 0;
1212 int oldcxix = -2;
1213
1214 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1215 {
1216 PERL_ASYNC_CHECK ();
1217
1218 if (cctx_current->flags & CC_TRACE_ALL)
1219 {
1220 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1221 {
1222 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1223 SV **bot, **top;
1224 AV *av = newAV (); /* return values */
1225 SV **cb;
1226 dSP;
1227
1228 GV *gv = CvGV (cx->blk_sub.cv);
1229 SV *fullname = sv_2mortal (newSV (0));
1230 if (isGV (gv))
1231 gv_efullname3 (fullname, gv, 0);
1232
1233 bot = PL_stack_base + cx->blk_oldsp + 1;
1234 top = cx->blk_gimme == G_ARRAY ? SP + 1
1235 : cx->blk_gimme == G_SCALAR ? bot + 1
1236 : bot;
1237
1238 av_extend (av, top - bot);
1239 while (bot < top)
1240 av_push (av, SvREFCNT_inc_NN (*bot++));
1241
1242 PL_runops = RUNOPS_DEFAULT;
1243 ENTER;
1244 SAVETMPS;
1245 EXTEND (SP, 3);
1246 PUSHMARK (SP);
1247 PUSHs (&PL_sv_no);
1248 PUSHs (fullname);
1249 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1250 PUTBACK;
1251 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1252 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1253 SPAGAIN;
1254 FREETMPS;
1255 LEAVE;
1256 PL_runops = runops_trace;
1257 }
1258
1259 if (oldcop != PL_curcop)
1260 {
1261 oldcop = PL_curcop;
1262
1263 if (PL_curcop != &PL_compiling)
1264 {
1265 SV **cb;
1266
1267 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1268 {
1269 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1270
1271 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1272 {
1273 dSP;
1274 GV *gv = CvGV (cx->blk_sub.cv);
1275 SV *fullname = sv_2mortal (newSV (0));
1276
1277 if (isGV (gv))
1278 gv_efullname3 (fullname, gv, 0);
1279
1280 PL_runops = RUNOPS_DEFAULT;
1281 ENTER;
1282 SAVETMPS;
1283 EXTEND (SP, 3);
1284 PUSHMARK (SP);
1285 PUSHs (&PL_sv_yes);
1286 PUSHs (fullname);
1287 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1288 PUTBACK;
1289 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1290 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1291 SPAGAIN;
1292 FREETMPS;
1293 LEAVE;
1294 PL_runops = runops_trace;
1295 }
1296
1297 oldcxix = cxstack_ix;
1298 }
1299
1300 if (cctx_current->flags & CC_TRACE_LINE)
1301 {
1302 dSP;
1303
1304 PL_runops = RUNOPS_DEFAULT;
1305 ENTER;
1306 SAVETMPS;
1307 EXTEND (SP, 3);
1308 PL_runops = RUNOPS_DEFAULT;
1309 PUSHMARK (SP);
1310 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1311 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1312 PUTBACK;
1313 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1314 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1315 SPAGAIN;
1316 FREETMPS;
1317 LEAVE;
1318 PL_runops = runops_trace;
1319 }
1320 }
1321 }
1322 }
1323 }
1324
1325 TAINT_NOT;
1326 return 0;
1327}
1328
1329static struct CoroSLF cctx_ssl_frame;
1330
1331static void
1332slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1333{
1334 ta->prev = 0;
1335}
1336
1337static int
1338slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1339{
1340 *frame = cctx_ssl_frame;
1341
1342 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1343}
1344
1345/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1346static void NOINLINE
1347cctx_prepare (pTHX)
1348{
1349 PL_top_env = &PL_start_env;
1350
1351 if (cctx_current->flags & CC_TRACE)
1352 PL_runops = runops_trace;
1353
1354 /* we already must be executing an SLF op, there is no other valid way
1355 * that can lead to creation of a new cctx */
1356 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1357 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1358
1359 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1360 cctx_ssl_frame = slf_frame;
1361
1362 slf_frame.prepare = slf_prepare_set_stacklevel;
1363 slf_frame.check = slf_check_set_stacklevel;
1364}
1365
1366/* the tail of transfer: execute stuff we can only do after a transfer */
1367INLINE void
1368transfer_tail (pTHX)
1369{
1370 free_coro_mortal (aTHX);
1371}
1372
1373/*
1374 * this is a _very_ stripped down perl interpreter ;)
1375 */
1376static void
1377cctx_run (void *arg)
1378{
1379#ifdef USE_ITHREADS
1380# if CORO_PTHREAD
1381 PERL_SET_CONTEXT (coro_thx);
1382# endif
1383#endif
1384 {
1385 dTHX;
1386
1387 /* normally we would need to skip the entersub here */
1388 /* not doing so will re-execute it, which is exactly what we want */
1389 /* PL_nop = PL_nop->op_next */
1390
1391 /* inject a fake subroutine call to cctx_init */
1392 cctx_prepare (aTHX);
1393
1394 /* cctx_run is the alternative tail of transfer() */
1395 transfer_tail (aTHX);
1396
1397 /* somebody or something will hit me for both perl_run and PL_restartop */
1398 PL_restartop = PL_op;
1399 perl_run (PL_curinterp);
1400 /*
1401 * Unfortunately, there is no way to get at the return values of the
1402 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1403 * runtime errors here, as this is just a random interpreter, not a thread.
1404 */
1405
1406 /*
1407 * If perl-run returns we assume exit() was being called or the coro
1408 * fell off the end, which seems to be the only valid (non-bug)
1409 * reason for perl_run to return. We try to exit by jumping to the
1410 * bootstrap-time "top" top_env, as we cannot restore the "main"
1411 * coroutine as Coro has no such concept.
1412 * This actually isn't valid with the pthread backend, but OSes requiring
1413 * that backend are too broken to do it in a standards-compliant way.
1414 */
1415 PL_top_env = main_top_env;
1416 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1417 }
1418}
1419
1420static coro_cctx *
1421cctx_new ()
1422{
1423 coro_cctx *cctx;
1424
1425 ++cctx_count;
1426 New (0, cctx, 1, coro_cctx);
1427
1428 cctx->gen = cctx_gen;
1429 cctx->flags = 0;
1430 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1431
1432 return cctx;
1433}
1434
1435/* create a new cctx only suitable as source */
1436static coro_cctx *
1437cctx_new_empty ()
1438{
1439 coro_cctx *cctx = cctx_new ();
1440
1441 cctx->sptr = 0;
1442 coro_create (&cctx->cctx, 0, 0, 0, 0);
1443
1444 return cctx;
1445}
1446
1447/* create a new cctx suitable as destination/running a perl interpreter */
1448static coro_cctx *
1449cctx_new_run ()
1450{
1451 coro_cctx *cctx = cctx_new ();
1452 void *stack_start;
1453 size_t stack_size;
1454
1455#if HAVE_MMAP
1456 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1457 /* mmap supposedly does allocate-on-write for us */
1458 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1459
1460 if (cctx->sptr != (void *)-1)
1461 {
1462 #if CORO_STACKGUARD
1463 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1464 #endif
1465 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1466 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1467 cctx->flags |= CC_MAPPED;
1468 }
1469 else
1470#endif
1471 {
1472 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1473 New (0, cctx->sptr, cctx_stacksize, long);
1474
1475 if (!cctx->sptr)
1476 {
1477 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1478 _exit (EXIT_FAILURE);
1479 }
1480
1481 stack_start = cctx->sptr;
1482 stack_size = cctx->ssize;
1483 }
1484
1485 #if CORO_USE_VALGRIND
1486 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1487 #endif
1488
1489 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1490
1491 return cctx;
1492}
1493
1494static void
1495cctx_destroy (coro_cctx *cctx)
1496{
1497 if (!cctx)
1498 return;
1499
1500 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1501
1502 --cctx_count;
1503 coro_destroy (&cctx->cctx);
1504
1505 /* coro_transfer creates new, empty cctx's */
1506 if (cctx->sptr)
1507 {
1508 #if CORO_USE_VALGRIND
1509 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1510 #endif
1511
1512#if HAVE_MMAP
1513 if (cctx->flags & CC_MAPPED)
1514 munmap (cctx->sptr, cctx->ssize);
1515 else
1516#endif
1517 Safefree (cctx->sptr);
1518 }
1519
1520 Safefree (cctx);
1521}
1522
1523/* wether this cctx should be destructed */
1524#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1525
1526static coro_cctx *
1527cctx_get (pTHX)
1528{
1529 while (expect_true (cctx_first))
1530 {
1531 coro_cctx *cctx = cctx_first;
1532 cctx_first = cctx->next;
1533 --cctx_idle;
1534
1535 if (expect_true (!CCTX_EXPIRED (cctx)))
1536 return cctx;
1537
1538 cctx_destroy (cctx);
1539 }
1540
1541 return cctx_new_run ();
1542}
1543
1544static void
1545cctx_put (coro_cctx *cctx)
1546{
1547 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1548
1549 /* free another cctx if overlimit */
1550 if (expect_false (cctx_idle >= cctx_max_idle))
1551 {
1552 coro_cctx *first = cctx_first;
1553 cctx_first = first->next;
1554 --cctx_idle;
1555
1556 cctx_destroy (first);
1557 }
1558
1559 ++cctx_idle;
1560 cctx->next = cctx_first;
1561 cctx_first = cctx;
1562}
1563
1564/** coroutine switching *****************************************************/
1565
1566static void
1567transfer_check (pTHX_ struct coro *prev, struct coro *next)
1568{
1569 /* TODO: throwing up here is considered harmful */
1570
1571 if (expect_true (prev != next))
1572 {
1573 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1574 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1575
1576 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1577 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1578
1579#if !PERL_VERSION_ATLEAST (5,10,0)
1580 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1581 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1582#endif
1583 }
1584}
1585
1586/* always use the TRANSFER macro */
1587static void NOINLINE /* noinline so we have a fixed stackframe */
1588transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1589{
1590 dSTACKLEVEL;
1591
1592 /* sometimes transfer is only called to set idle_sp */
1593 if (expect_false (!prev))
1594 {
1595 cctx_current->idle_sp = STACKLEVEL;
1596 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1597 }
1598 else if (expect_true (prev != next))
1599 {
1600 coro_cctx *cctx_prev;
1601
1602 if (expect_false (prev->flags & CF_NEW))
1603 {
1604 /* create a new empty/source context */
1605 prev->flags &= ~CF_NEW;
1606 prev->flags |= CF_RUNNING;
1607 }
1608
1609 prev->flags &= ~CF_RUNNING;
1610 next->flags |= CF_RUNNING;
1611
1612 /* first get rid of the old state */
1613 save_perl (aTHX_ prev);
1614
1615 if (expect_false (next->flags & CF_NEW))
1616 {
1617 /* need to start coroutine */
1618 next->flags &= ~CF_NEW;
1619 /* setup coroutine call */
1620 init_perl (aTHX_ next);
1621 }
1622 else
1623 load_perl (aTHX_ next);
1624
1625 /* possibly untie and reuse the cctx */
1626 if (expect_true (
1627 cctx_current->idle_sp == STACKLEVEL
1628 && !(cctx_current->flags & CC_TRACE)
1629 && !force_cctx
1630 ))
1631 {
1632 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1633 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1634
1635 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1636 /* without this the next cctx_get might destroy the running cctx while still in use */
1637 if (expect_false (CCTX_EXPIRED (cctx_current)))
1638 if (expect_true (!next->cctx))
1639 next->cctx = cctx_get (aTHX);
1640
1641 cctx_put (cctx_current);
1642 }
1643 else
1644 prev->cctx = cctx_current;
1645
1646 ++next->usecount;
1647
1648 cctx_prev = cctx_current;
1649 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1650
1651 next->cctx = 0;
1652
1653 if (expect_false (cctx_prev != cctx_current))
1654 {
1655 cctx_prev->top_env = PL_top_env;
1656 PL_top_env = cctx_current->top_env;
1657 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1658 }
1659
1660 transfer_tail (aTHX);
1661 }
1662}
1663
1664#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1665#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1666
1667/** high level stuff ********************************************************/
1668
1669static int
1670coro_state_destroy (pTHX_ struct coro *coro)
1671{
1672 if (coro->flags & CF_DESTROYED)
1673 return 0;
1674
1675 if (coro->on_destroy && !PL_dirty)
1676 coro->on_destroy (aTHX_ coro);
1677
1678 coro->flags |= CF_DESTROYED;
1679
1680 if (coro->flags & CF_READY)
1681 {
1682 /* reduce nready, as destroying a ready coro effectively unreadies it */
1683 /* alternative: look through all ready queues and remove the coro */
1684 --coro_nready;
1685 }
1686 else
1687 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1688
1689 if (coro->mainstack
1690 && coro->mainstack != main_mainstack
1691 && coro->slot
1692 && !PL_dirty)
1693 destroy_perl (aTHX_ coro);
1694
1695 if (coro->next) coro->next->prev = coro->prev;
1696 if (coro->prev) coro->prev->next = coro->next;
1697 if (coro == coro_first) coro_first = coro->next;
1698
1699 cctx_destroy (coro->cctx);
1700 SvREFCNT_dec (coro->startcv);
1701 SvREFCNT_dec (coro->args);
1702 SvREFCNT_dec (coro->swap_sv);
1703 SvREFCNT_dec (CORO_THROW);
1704
1705 return 1;
1706}
1707
1708static int
1709coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1710{
1711 struct coro *coro = (struct coro *)mg->mg_ptr;
1712 mg->mg_ptr = 0;
1713
1714 coro->hv = 0;
1715
1716 if (--coro->refcnt < 0)
1717 {
1718 coro_state_destroy (aTHX_ coro);
1719 Safefree (coro);
1720 }
1721
1722 return 0;
1723}
1724
1725static int
1726coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1727{
1728 struct coro *coro = (struct coro *)mg->mg_ptr;
1729
1730 ++coro->refcnt;
1731
1732 return 0;
1733}
1734
1735static MGVTBL coro_state_vtbl = {
1736 0, 0, 0, 0,
1737 coro_state_free,
1738 0,
1739#ifdef MGf_DUP
1740 coro_state_dup,
1741#else
1742# define MGf_DUP 0
1743#endif
1744};
1745
1746static void
1747prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1748{
1749 ta->prev = SvSTATE (prev_sv);
1750 ta->next = SvSTATE (next_sv);
1751 TRANSFER_CHECK (*ta);
1752}
1753
1754static void
1755api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1756{
1757 struct coro_transfer_args ta;
1758
1759 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1760 TRANSFER (ta, 1);
1761}
1762
1763/** Coro ********************************************************************/
1764
1765INLINE void
1766coro_enq (pTHX_ struct coro *coro)
1767{
1768 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1769
1770 SvREFCNT_inc_NN (coro->hv);
1771
1772 coro->next_ready = 0;
1773 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1774 ready [1] = coro;
1775}
1776
1777INLINE struct coro *
1778coro_deq (pTHX)
1779{
1780 int prio;
1781
1782 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1783 {
1784 struct coro **ready = coro_ready [prio];
1785
1786 if (ready [0])
1787 {
1788 struct coro *coro = ready [0];
1789 ready [0] = coro->next_ready;
1790 return coro;
1791 }
1792 }
1793
1794 return 0;
1795}
1796
1797static void
1798invoke_sv_ready_hook_helper (void)
1799{
1800 dTHX;
595 dSP; 1801 dSP;
596 Coro__State ctx = (Coro__State)arg;
597 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
598 1802
599 coro_init_stacks (aTHX); 1803 ENTER;
600 /*PL_curcop = 0;*/ 1804 SAVETMPS;
601 /*PL_in_eval = PL_in_eval;*/ /* inherit */
602 SvREFCNT_dec (GvAV (PL_defgv));
603 GvAV (PL_defgv) = ctx->args;
604 1805
605 SPAGAIN;
606
607 if (ctx->stack)
608 {
609 ctx->cursp = 0;
610
611 PUSHMARK(SP); 1806 PUSHMARK (SP);
612 PUTBACK; 1807 PUTBACK;
613 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1808 call_sv (coro_readyhook, G_VOID | G_DISCARD);
614 1809
615 if (SvTRUE (ERRSV)) 1810 FREETMPS;
616 croak (NULL); 1811 LEAVE;
617 else 1812}
618 croak ("FATAL: CCTXT coroutine returned!"); 1813
1814static int
1815api_ready (pTHX_ SV *coro_sv)
1816{
1817 struct coro *coro = SvSTATE (coro_sv);
1818
1819 if (coro->flags & CF_READY)
1820 return 0;
1821
1822 coro->flags |= CF_READY;
1823
1824 coro_enq (aTHX_ coro);
1825
1826 if (!coro_nready++)
1827 if (coroapi.readyhook)
1828 coroapi.readyhook ();
1829
1830 return 1;
1831}
1832
1833static int
1834api_is_ready (pTHX_ SV *coro_sv)
1835{
1836 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1837}
1838
1839/* expects to own a reference to next->hv */
1840INLINE void
1841prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1842{
1843 SV *prev_sv = SvRV (coro_current);
1844
1845 ta->prev = SvSTATE_hv (prev_sv);
1846 ta->next = next;
1847
1848 TRANSFER_CHECK (*ta);
1849
1850 SvRV_set (coro_current, (SV *)next->hv);
1851
1852 free_coro_mortal (aTHX);
1853 coro_mortal = prev_sv;
1854}
1855
1856static void
1857prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1858{
1859 for (;;)
619 } 1860 {
620 else 1861 struct coro *next = coro_deq (aTHX);
621 {
622 UNOP myop;
623 1862
624 PL_op = (OP *)&myop; 1863 if (expect_true (next))
625
626 Zero(&myop, 1, UNOP);
627 myop.op_next = Nullop;
628 myop.op_flags = OPf_WANT_VOID;
629
630 PUSHMARK(SP);
631 XPUSHs (sub_init);
632 /*
633 * the next line is slightly wrong, as PL_op->op_next
634 * is actually being executed so we skip the first op.
635 * that doesn't matter, though, since it is only
636 * pp_nextstate and we never return...
637 * ah yes, and I don't care anyways ;)
638 */
639 PUTBACK;
640 PL_op = pp_entersub();
641 SPAGAIN;
642
643 ENTER; /* necessary e.g. for dounwind */
644 }
645}
646
647static void
648continue_coro (void *arg)
649{
650 /*
651 * this is a _very_ stripped down perl interpreter ;)
652 */
653 Coro__State ctx = (Coro__State)arg;
654
655 /*FIXME*//* must set up top_env here */
656 ctx->cursp = 0;
657 PL_op = PL_op->op_next;
658 CALLRUNOPS(aTHX);
659
660 abort ();
661}
662
663STATIC void
664transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
665{
666 dSP;
667 dSTACKLEVEL;
668
669 if (prev != next)
670 {
671 if (next->mainstack)
672 { 1864 {
673 SAVE (prev, flags); 1865 /* cannot transfer to destroyed coros, skip and look for next */
674 LOAD (next); 1866 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
675 1867 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
676 /* mark this state as in-use */ 1868 else
677 next->mainstack = 0;
678 next->tmps_ix = -2;
679
680 /* stacklevel changed? if yes, grab the stack for us! */
681 if (flags & TRANSFER_SAVE_CCTXT)
682 { 1869 {
683 if (!prev->stack) 1870 next->flags &= ~CF_READY;
684 allocate_stack (prev, 0); 1871 --coro_nready;
685 else if (prev->cursp != stacklevel 1872
686 && prev->stack->usecnt > 1) 1873 prepare_schedule_to (aTHX_ ta, next);
687 { 1874 break;
688 prev->gencnt = ++prev->stack->gencnt;
689 prev->stack->usecnt = 1;
690 }
691
692 /* has our stack been invalidated? */
693 if (next->stack && next->stack->gencnt != next->gencnt)
694 {
695 deallocate_stack (next);
696 allocate_stack (next, 1);
697 coro_create (&(next->stack->cctx),
698 continue_coro, (void *)next,
699 next->stack->sptr, labs (next->stack->ssize));
700 }
701
702 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703 } 1875 }
704
705 } 1876 }
706 else if (next->tmps_ix == -2)
707 croak ("tried to transfer to running coroutine");
708 else 1877 else
709 { 1878 {
710 SAVE (prev, -1); /* first get rid of the old state */ 1879 /* nothing to schedule: call the idle handler */
711 1880 if (SvROK (sv_idle)
712 if (flags & TRANSFER_SAVE_CCTXT) 1881 && SvOBJECT (SvRV (sv_idle)))
713 { 1882 {
714 if (!prev->stack) 1883 if (SvRV (sv_idle) == SvRV (coro_current))
715 allocate_stack (prev, 0); 1884 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
716 1885
717 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1886 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
718 { 1887 api_ready (aTHX_ SvRV (sv_idle));
719 setup_coro (next); 1888 --coro_nready;
720
721 prev->stack->refcnt++;
722 prev->stack->usecnt++;
723 next->stack = prev->stack;
724 next->gencnt = prev->gencnt;
725 }
726 else
727 {
728 allocate_stack (next, 1);
729 coro_create (&(next->stack->cctx),
730 setup_coro, (void *)next,
731 next->stack->sptr, labs (next->stack->ssize));
732 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733 }
734 } 1889 }
735 else 1890 else
736 setup_coro (next); 1891 {
1892 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1893 dSP;
1894
1895 ENTER;
1896 SAVETMPS;
1897
1898 PUSHMARK (SP);
1899 PUTBACK;
1900 call_sv (sv_idle, G_VOID | G_DISCARD);
1901
1902 FREETMPS;
1903 LEAVE;
1904 }
737 } 1905 }
738 } 1906 }
739
740 next->cursp = stacklevel;
741} 1907}
742 1908
743static struct coro * 1909INLINE void
744sv_to_coro (SV *arg, const char *funcname, const char *varname) 1910prepare_cede (pTHX_ struct coro_transfer_args *ta)
745{ 1911{
746 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 1912 api_ready (aTHX_ coro_current);
747 { 1913 prepare_schedule (aTHX_ ta);
748 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 1914}
749 1915
750 if (!he) 1916INLINE void
751 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); 1917prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1918{
1919 SV *prev = SvRV (coro_current);
752 1920
753 arg = HeVAL(he); 1921 if (coro_nready)
754 } 1922 {
1923 prepare_schedule (aTHX_ ta);
1924 api_ready (aTHX_ prev);
755 1925 }
756 /* must also be changed inside Coro::Cont::yield */
757 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758 return (struct coro *) SvIV((SV*)SvRV(arg));
759 else 1926 else
760 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname); 1927 prepare_nop (aTHX_ ta);
761} 1928}
762 1929
1930static void
1931api_schedule (pTHX)
1932{
1933 struct coro_transfer_args ta;
1934
1935 prepare_schedule (aTHX_ &ta);
1936 TRANSFER (ta, 1);
1937}
1938
1939static void
1940api_schedule_to (pTHX_ SV *coro_sv)
1941{
1942 struct coro_transfer_args ta;
1943 struct coro *next = SvSTATE (coro_sv);
1944
1945 SvREFCNT_inc_NN (coro_sv);
1946 prepare_schedule_to (aTHX_ &ta, next);
1947}
1948
763static void 1949static int
764api_transfer(pTHX_ SV *prev, SV *next, int flags) 1950api_cede (pTHX)
765{ 1951{
766 transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"), 1952 struct coro_transfer_args ta;
767 sv_to_coro (next, "Coro::transfer", "next"),
768 flags);
769}
770 1953
771/** Coro ********************************************************************/ 1954 prepare_cede (aTHX_ &ta);
772 1955
773#define PRIO_MAX 3 1956 if (expect_true (ta.prev != ta.next))
774#define PRIO_HIGH 1 1957 {
775#define PRIO_NORMAL 0 1958 TRANSFER (ta, 1);
776#define PRIO_LOW -1 1959 return 1;
777#define PRIO_IDLE -3
778#define PRIO_MIN -4
779
780/* for Coro.pm */
781static GV *coro_current, *coro_idle;
782static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
783static int coro_nready;
784
785static void
786coro_enq (SV *sv)
787{
788 if (SvROK (sv))
789 { 1960 }
790 SV *hv = SvRV (sv); 1961 else
791 if (SvTYPE (hv) == SVt_PVHV) 1962 return 0;
1963}
1964
1965static int
1966api_cede_notself (pTHX)
1967{
1968 if (coro_nready)
1969 {
1970 struct coro_transfer_args ta;
1971
1972 prepare_cede_notself (aTHX_ &ta);
1973 TRANSFER (ta, 1);
1974 return 1;
1975 }
1976 else
1977 return 0;
1978}
1979
1980static void
1981api_trace (pTHX_ SV *coro_sv, int flags)
1982{
1983 struct coro *coro = SvSTATE (coro_sv);
1984
1985 if (coro->flags & CF_RUNNING)
1986 croak ("cannot enable tracing on a running coroutine, caught");
1987
1988 if (flags & CC_TRACE)
1989 {
1990 if (!coro->cctx)
1991 coro->cctx = cctx_new_run ();
1992 else if (!(coro->cctx->flags & CC_TRACE))
1993 croak ("cannot enable tracing on coroutine with custom stack, caught");
1994
1995 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1996 }
1997 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1998 {
1999 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2000
2001 if (coro->flags & CF_RUNNING)
2002 PL_runops = RUNOPS_DEFAULT;
2003 else
2004 coro->slot->runops = RUNOPS_DEFAULT;
2005 }
2006}
2007
2008static void
2009coro_call_on_destroy (pTHX_ struct coro *coro)
2010{
2011 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2012 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2013
2014 if (on_destroyp)
2015 {
2016 AV *on_destroy = (AV *)SvRV (*on_destroyp);
2017
2018 while (AvFILLp (on_destroy) >= 0)
792 { 2019 {
793 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 2020 dSP; /* don't disturb outer sp */
794 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2021 SV *cb = av_pop (on_destroy);
795 2022
796 prio = prio > PRIO_MAX ? PRIO_MAX 2023 PUSHMARK (SP);
797 : prio < PRIO_MIN ? PRIO_MIN 2024
2025 if (statusp)
2026 {
798 : prio; 2027 int i;
2028 AV *status = (AV *)SvRV (*statusp);
2029 EXTEND (SP, AvFILLp (status) + 1);
799 2030
800 av_push (coro_ready [prio - PRIO_MIN], sv); 2031 for (i = 0; i <= AvFILLp (status); ++i)
801 coro_nready++; 2032 PUSHs (AvARRAY (status)[i]);
2033 }
802 2034
803 return; 2035 PUTBACK;
2036 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
804 } 2037 }
805 } 2038 }
2039}
806 2040
807 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2041static void
2042slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2043{
2044 int i;
2045 HV *hv = (HV *)SvRV (coro_current);
2046 AV *av = newAV ();
2047
2048 /* items are actually not so common, so optimise for this case */
2049 if (items)
2050 {
2051 av_extend (av, items - 1);
2052
2053 for (i = 0; i < items; ++i)
2054 av_push (av, SvREFCNT_inc_NN (arg [i]));
2055 }
2056
2057 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2058
2059 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2060 api_ready (aTHX_ sv_manager);
2061
2062 frame->prepare = prepare_schedule;
2063 frame->check = slf_check_repeat;
2064
2065 /* as a minor optimisation, we could unwind all stacks here */
2066 /* but that puts extra pressure on pp_slf, and is not worth much */
2067 /*coro_unwind_stacks (aTHX);*/
2068}
2069
2070/*****************************************************************************/
2071/* async pool handler */
2072
2073static int
2074slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2075{
2076 HV *hv = (HV *)SvRV (coro_current);
2077 struct coro *coro = (struct coro *)frame->data;
2078
2079 if (!coro->invoke_cb)
2080 return 1; /* loop till we have invoke */
2081 else
2082 {
2083 hv_store (hv, "desc", sizeof ("desc") - 1,
2084 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2085
2086 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2087
2088 {
2089 dSP;
2090 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2091 PUTBACK;
2092 }
2093
2094 SvREFCNT_dec (GvAV (PL_defgv));
2095 GvAV (PL_defgv) = coro->invoke_av;
2096 coro->invoke_av = 0;
2097
2098 return 0;
2099 }
2100}
2101
2102static void
2103slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2104{
2105 HV *hv = (HV *)SvRV (coro_current);
2106 struct coro *coro = SvSTATE_hv ((SV *)hv);
2107
2108 if (expect_true (coro->saved_deffh))
2109 {
2110 /* subsequent iteration */
2111 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2112 coro->saved_deffh = 0;
2113
2114 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2115 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2116 {
2117 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2118 coro->invoke_av = newAV ();
2119
2120 frame->prepare = prepare_nop;
2121 }
2122 else
2123 {
2124 av_clear (GvAV (PL_defgv));
2125 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2126
2127 coro->prio = 0;
2128
2129 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2130 api_trace (aTHX_ coro_current, 0);
2131
2132 frame->prepare = prepare_schedule;
2133 av_push (av_async_pool, SvREFCNT_inc (hv));
2134 }
2135 }
2136 else
2137 {
2138 /* first iteration, simply fall through */
2139 frame->prepare = prepare_nop;
2140 }
2141
2142 frame->check = slf_check_pool_handler;
2143 frame->data = (void *)coro;
2144}
2145
2146/*****************************************************************************/
2147/* rouse callback */
2148
2149#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2150
2151static void
2152coro_rouse_callback (pTHX_ CV *cv)
2153{
2154 dXSARGS;
2155 SV *data = (SV *)S_GENSUB_ARG;
2156
2157 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2158 {
2159 /* first call, set args */
2160 SV *coro = SvRV (data);
2161 AV *av = newAV ();
2162
2163 SvRV_set (data, (SV *)av);
2164
2165 /* better take a full copy of the arguments */
2166 while (items--)
2167 av_store (av, items, newSVsv (ST (items)));
2168
2169 api_ready (aTHX_ coro);
2170 SvREFCNT_dec (coro);
2171 }
2172
2173 XSRETURN_EMPTY;
2174}
2175
2176static int
2177slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2178{
2179 SV *data = (SV *)frame->data;
2180
2181 if (CORO_THROW)
2182 return 0;
2183
2184 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2185 return 1;
2186
2187 /* now push all results on the stack */
2188 {
2189 dSP;
2190 AV *av = (AV *)SvRV (data);
2191 int i;
2192
2193 EXTEND (SP, AvFILLp (av) + 1);
2194 for (i = 0; i <= AvFILLp (av); ++i)
2195 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2196
2197 /* we have stolen the elements, so set length to zero and free */
2198 AvFILLp (av) = -1;
2199 av_undef (av);
2200
2201 PUTBACK;
2202 }
2203
2204 return 0;
2205}
2206
2207static void
2208slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2209{
2210 SV *cb;
2211
2212 if (items)
2213 cb = arg [0];
2214 else
2215 {
2216 struct coro *coro = SvSTATE_current;
2217
2218 if (!coro->rouse_cb)
2219 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2220
2221 cb = sv_2mortal (coro->rouse_cb);
2222 coro->rouse_cb = 0;
2223 }
2224
2225 if (!SvROK (cb)
2226 || SvTYPE (SvRV (cb)) != SVt_PVCV
2227 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2228 croak ("Coro::rouse_wait called with illegal callback argument,");
2229
2230 {
2231 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2232 SV *data = (SV *)S_GENSUB_ARG;
2233
2234 frame->data = (void *)data;
2235 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2236 frame->check = slf_check_rouse_wait;
2237 }
808} 2238}
809 2239
810static SV * 2240static SV *
811coro_deq (int min_prio) 2241coro_new_rouse_cb (pTHX)
812{ 2242{
813 int prio = PRIO_MAX - PRIO_MIN; 2243 HV *hv = (HV *)SvRV (coro_current);
2244 struct coro *coro = SvSTATE_hv (hv);
2245 SV *data = newRV_inc ((SV *)hv);
2246 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
814 2247
815 min_prio -= PRIO_MIN; 2248 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
816 if (min_prio < 0) 2249 SvREFCNT_dec (data); /* magicext increases the refcount */
817 min_prio = 0;
818 2250
819 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2251 SvREFCNT_dec (coro->rouse_cb);
820 if (av_len (coro_ready[prio]) >= 0) 2252 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2253
2254 return cb;
2255}
2256
2257/*****************************************************************************/
2258/* schedule-like-function opcode (SLF) */
2259
2260static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2261static const CV *slf_cv;
2262static SV **slf_argv;
2263static int slf_argc, slf_arga; /* count, allocated */
2264static I32 slf_ax; /* top of stack, for restore */
2265
2266/* this restores the stack in the case we patched the entersub, to */
2267/* recreate the stack frame as perl will on following calls */
2268/* since entersub cleared the stack */
2269static OP *
2270pp_restore (pTHX)
2271{
2272 int i;
2273 SV **SP = PL_stack_base + slf_ax;
2274
2275 PUSHMARK (SP);
2276
2277 EXTEND (SP, slf_argc + 1);
2278
2279 for (i = 0; i < slf_argc; ++i)
2280 PUSHs (sv_2mortal (slf_argv [i]));
2281
2282 PUSHs ((SV *)CvGV (slf_cv));
2283
2284 RETURNOP (slf_restore.op_first);
2285}
2286
2287static void
2288slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2289{
2290 SV **arg = (SV **)slf_frame.data;
2291
2292 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2293}
2294
2295static void
2296slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2297{
2298 if (items != 2)
2299 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2300
2301 frame->prepare = slf_prepare_transfer;
2302 frame->check = slf_check_nop;
2303 frame->data = (void *)arg; /* let's hope it will stay valid */
2304}
2305
2306static void
2307slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2308{
2309 frame->prepare = prepare_schedule;
2310 frame->check = slf_check_nop;
2311}
2312
2313static void
2314slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2315{
2316 struct coro *next = (struct coro *)slf_frame.data;
2317
2318 SvREFCNT_inc_NN (next->hv);
2319 prepare_schedule_to (aTHX_ ta, next);
2320}
2321
2322static void
2323slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2324{
2325 if (!items)
2326 croak ("Coro::schedule_to expects a coroutine argument, caught");
2327
2328 frame->data = (void *)SvSTATE (arg [0]);
2329 frame->prepare = slf_prepare_schedule_to;
2330 frame->check = slf_check_nop;
2331}
2332
2333static void
2334slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2335{
2336 api_ready (aTHX_ SvRV (coro_current));
2337
2338 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2339}
2340
2341static void
2342slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2343{
2344 frame->prepare = prepare_cede;
2345 frame->check = slf_check_nop;
2346}
2347
2348static void
2349slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2350{
2351 frame->prepare = prepare_cede_notself;
2352 frame->check = slf_check_nop;
2353}
2354
2355/*
2356 * these not obviously related functions are all rolled into one
2357 * function to increase chances that they all will call transfer with the same
2358 * stack offset
2359 * SLF stands for "schedule-like-function".
2360 */
2361static OP *
2362pp_slf (pTHX)
2363{
2364 I32 checkmark; /* mark SP to see how many elements check has pushed */
2365
2366 /* set up the slf frame, unless it has already been set-up */
2367 /* the latter happens when a new coro has been started */
2368 /* or when a new cctx was attached to an existing coroutine */
2369 if (expect_true (!slf_frame.prepare))
2370 {
2371 /* first iteration */
2372 dSP;
2373 SV **arg = PL_stack_base + TOPMARK + 1;
2374 int items = SP - arg; /* args without function object */
2375 SV *gv = *sp;
2376
2377 /* do a quick consistency check on the "function" object, and if it isn't */
2378 /* for us, divert to the real entersub */
2379 if (SvTYPE (gv) != SVt_PVGV
2380 || !GvCV (gv)
2381 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2382 return PL_ppaddr[OP_ENTERSUB](aTHX);
2383
2384 if (!(PL_op->op_flags & OPf_STACKED))
821 { 2385 {
822 coro_nready--; 2386 /* ampersand-form of call, use @_ instead of stack */
823 return av_shift (coro_ready[prio]); 2387 AV *av = GvAV (PL_defgv);
2388 arg = AvARRAY (av);
2389 items = AvFILLp (av) + 1;
824 } 2390 }
2391
2392 /* now call the init function, which needs to set up slf_frame */
2393 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2394 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2395
2396 /* pop args */
2397 SP = PL_stack_base + POPMARK;
2398
2399 PUTBACK;
2400 }
2401
2402 /* now that we have a slf_frame, interpret it! */
2403 /* we use a callback system not to make the code needlessly */
2404 /* complicated, but so we can run multiple perl coros from one cctx */
2405
2406 do
2407 {
2408 struct coro_transfer_args ta;
2409
2410 slf_frame.prepare (aTHX_ &ta);
2411 TRANSFER (ta, 0);
2412
2413 checkmark = PL_stack_sp - PL_stack_base;
2414 }
2415 while (slf_frame.check (aTHX_ &slf_frame));
2416
2417 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2418
2419 /* exception handling */
2420 if (expect_false (CORO_THROW))
2421 {
2422 SV *exception = sv_2mortal (CORO_THROW);
2423
2424 CORO_THROW = 0;
2425 sv_setsv (ERRSV, exception);
2426 croak (0);
2427 }
2428
2429 /* return value handling - mostly like entersub */
2430 /* make sure we put something on the stack in scalar context */
2431 if (GIMME_V == G_SCALAR)
2432 {
2433 dSP;
2434 SV **bot = PL_stack_base + checkmark;
2435
2436 if (sp == bot) /* too few, push undef */
2437 bot [1] = &PL_sv_undef;
2438 else if (sp != bot + 1) /* too many, take last one */
2439 bot [1] = *sp;
2440
2441 SP = bot + 1;
2442
2443 PUTBACK;
2444 }
2445
2446 return NORMAL;
2447}
2448
2449static void
2450api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2451{
2452 int i;
2453 SV **arg = PL_stack_base + ax;
2454 int items = PL_stack_sp - arg + 1;
2455
2456 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2457
2458 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2459 && PL_op->op_ppaddr != pp_slf)
2460 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2461
2462 CvFLAGS (cv) |= CVf_SLF;
2463 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2464 slf_cv = cv;
2465
2466 /* we patch the op, and then re-run the whole call */
2467 /* we have to put the same argument on the stack for this to work */
2468 /* and this will be done by pp_restore */
2469 slf_restore.op_next = (OP *)&slf_restore;
2470 slf_restore.op_type = OP_CUSTOM;
2471 slf_restore.op_ppaddr = pp_restore;
2472 slf_restore.op_first = PL_op;
2473
2474 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2475
2476 if (PL_op->op_flags & OPf_STACKED)
2477 {
2478 if (items > slf_arga)
2479 {
2480 slf_arga = items;
2481 Safefree (slf_argv);
2482 New (0, slf_argv, slf_arga, SV *);
2483 }
2484
2485 slf_argc = items;
2486
2487 for (i = 0; i < items; ++i)
2488 slf_argv [i] = SvREFCNT_inc (arg [i]);
2489 }
2490 else
2491 slf_argc = 0;
2492
2493 PL_op->op_ppaddr = pp_slf;
2494 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2495
2496 PL_op = (OP *)&slf_restore;
2497}
2498
2499/*****************************************************************************/
2500/* dynamic wind */
2501
2502static void
2503on_enterleave_call (pTHX_ SV *cb)
2504{
2505 dSP;
2506
2507 PUSHSTACK;
2508
2509 PUSHMARK (SP);
2510 PUTBACK;
2511 call_sv (cb, G_VOID | G_DISCARD);
2512 SPAGAIN;
2513
2514 POPSTACK;
2515}
2516
2517static SV *
2518coro_avp_pop_and_free (pTHX_ AV **avp)
2519{
2520 AV *av = *avp;
2521 SV *res = av_pop (av);
2522
2523 if (AvFILLp (av) < 0)
2524 {
2525 *avp = 0;
2526 SvREFCNT_dec (av);
2527 }
2528
2529 return res;
2530}
2531
2532static void
2533coro_pop_on_enter (pTHX_ void *coro)
2534{
2535 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2536 SvREFCNT_dec (cb);
2537}
2538
2539static void
2540coro_pop_on_leave (pTHX_ void *coro)
2541{
2542 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2543 on_enterleave_call (aTHX_ sv_2mortal (cb));
2544}
2545
2546/*****************************************************************************/
2547/* PerlIO::cede */
2548
2549typedef struct
2550{
2551 PerlIOBuf base;
2552 NV next, every;
2553} PerlIOCede;
2554
2555static IV
2556PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2557{
2558 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2559
2560 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2561 self->next = nvtime () + self->every;
2562
2563 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2564}
2565
2566static SV *
2567PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2568{
2569 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2570
2571 return newSVnv (self->every);
2572}
2573
2574static IV
2575PerlIOCede_flush (pTHX_ PerlIO *f)
2576{
2577 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2578 double now = nvtime ();
2579
2580 if (now >= self->next)
2581 {
2582 api_cede (aTHX);
2583 self->next = now + self->every;
2584 }
2585
2586 return PerlIOBuf_flush (aTHX_ f);
2587}
2588
2589static PerlIO_funcs PerlIO_cede =
2590{
2591 sizeof(PerlIO_funcs),
2592 "cede",
2593 sizeof(PerlIOCede),
2594 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2595 PerlIOCede_pushed,
2596 PerlIOBuf_popped,
2597 PerlIOBuf_open,
2598 PerlIOBase_binmode,
2599 PerlIOCede_getarg,
2600 PerlIOBase_fileno,
2601 PerlIOBuf_dup,
2602 PerlIOBuf_read,
2603 PerlIOBuf_unread,
2604 PerlIOBuf_write,
2605 PerlIOBuf_seek,
2606 PerlIOBuf_tell,
2607 PerlIOBuf_close,
2608 PerlIOCede_flush,
2609 PerlIOBuf_fill,
2610 PerlIOBase_eof,
2611 PerlIOBase_error,
2612 PerlIOBase_clearerr,
2613 PerlIOBase_setlinebuf,
2614 PerlIOBuf_get_base,
2615 PerlIOBuf_bufsiz,
2616 PerlIOBuf_get_ptr,
2617 PerlIOBuf_get_cnt,
2618 PerlIOBuf_set_ptrcnt,
2619};
2620
2621/*****************************************************************************/
2622/* Coro::Semaphore & Coro::Signal */
2623
2624static SV *
2625coro_waitarray_new (pTHX_ int count)
2626{
2627 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2628 AV *av = newAV ();
2629 SV **ary;
2630
2631 /* unfortunately, building manually saves memory */
2632 Newx (ary, 2, SV *);
2633 AvALLOC (av) = ary;
2634#if PERL_VERSION_ATLEAST (5,10,0)
2635 AvARRAY (av) = ary;
2636#else
2637 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2638 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2639 SvPVX ((SV *)av) = (char *)ary;
2640#endif
2641 AvMAX (av) = 1;
2642 AvFILLp (av) = 0;
2643 ary [0] = newSViv (count);
2644
2645 return newRV_noinc ((SV *)av);
2646}
2647
2648/* semaphore */
2649
2650static void
2651coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2652{
2653 SV *count_sv = AvARRAY (av)[0];
2654 IV count = SvIVX (count_sv);
2655
2656 count += adjust;
2657 SvIVX (count_sv) = count;
2658
2659 /* now wake up as many waiters as are expected to lock */
2660 while (count > 0 && AvFILLp (av) > 0)
2661 {
2662 SV *cb;
2663
2664 /* swap first two elements so we can shift a waiter */
2665 AvARRAY (av)[0] = AvARRAY (av)[1];
2666 AvARRAY (av)[1] = count_sv;
2667 cb = av_shift (av);
2668
2669 if (SvOBJECT (cb))
2670 {
2671 api_ready (aTHX_ cb);
2672 --count;
2673 }
2674 else if (SvTYPE (cb) == SVt_PVCV)
2675 {
2676 dSP;
2677 PUSHMARK (SP);
2678 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2679 PUTBACK;
2680 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2681 }
2682
2683 SvREFCNT_dec (cb);
2684 }
2685}
2686
2687static void
2688coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2689{
2690 /* call $sem->adjust (0) to possibly wake up some other waiters */
2691 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2692}
2693
2694static int
2695slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2696{
2697 AV *av = (AV *)frame->data;
2698 SV *count_sv = AvARRAY (av)[0];
2699
2700 /* if we are about to throw, don't actually acquire the lock, just throw */
2701 if (CORO_THROW)
2702 return 0;
2703 else if (SvIVX (count_sv) > 0)
2704 {
2705 SvSTATE_current->on_destroy = 0;
2706
2707 if (acquire)
2708 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2709 else
2710 coro_semaphore_adjust (aTHX_ av, 0);
2711
2712 return 0;
2713 }
2714 else
2715 {
2716 int i;
2717 /* if we were woken up but can't down, we look through the whole */
2718 /* waiters list and only add us if we aren't in there already */
2719 /* this avoids some degenerate memory usage cases */
2720
2721 for (i = 1; i <= AvFILLp (av); ++i)
2722 if (AvARRAY (av)[i] == SvRV (coro_current))
2723 return 1;
2724
2725 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2726 return 1;
2727 }
2728}
2729
2730static int
2731slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2732{
2733 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2734}
2735
2736static int
2737slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2738{
2739 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2740}
2741
2742static void
2743slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2744{
2745 AV *av = (AV *)SvRV (arg [0]);
2746
2747 if (SvIVX (AvARRAY (av)[0]) > 0)
2748 {
2749 frame->data = (void *)av;
2750 frame->prepare = prepare_nop;
2751 }
2752 else
2753 {
2754 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2755
2756 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2757 frame->prepare = prepare_schedule;
2758
2759 /* to avoid race conditions when a woken-up coro gets terminated */
2760 /* we arrange for a temporary on_destroy that calls adjust (0) */
2761 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2762 }
2763}
2764
2765static void
2766slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2767{
2768 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2769 frame->check = slf_check_semaphore_down;
2770}
2771
2772static void
2773slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2774{
2775 if (items >= 2)
2776 {
2777 /* callback form */
2778 AV *av = (AV *)SvRV (arg [0]);
2779 SV *cb_cv = s_get_cv_croak (arg [1]);
2780
2781 av_push (av, SvREFCNT_inc_NN (cb_cv));
2782
2783 if (SvIVX (AvARRAY (av)[0]) > 0)
2784 coro_semaphore_adjust (aTHX_ av, 0);
2785
2786 frame->prepare = prepare_nop;
2787 frame->check = slf_check_nop;
2788 }
2789 else
2790 {
2791 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2792 frame->check = slf_check_semaphore_wait;
2793 }
2794}
2795
2796/* signal */
2797
2798static void
2799coro_signal_wake (pTHX_ AV *av, int count)
2800{
2801 SvIVX (AvARRAY (av)[0]) = 0;
2802
2803 /* now signal count waiters */
2804 while (count > 0 && AvFILLp (av) > 0)
2805 {
2806 SV *cb;
2807
2808 /* swap first two elements so we can shift a waiter */
2809 cb = AvARRAY (av)[0];
2810 AvARRAY (av)[0] = AvARRAY (av)[1];
2811 AvARRAY (av)[1] = cb;
2812
2813 cb = av_shift (av);
2814
2815 if (SvTYPE (cb) == SVt_PVCV)
2816 {
2817 dSP;
2818 PUSHMARK (SP);
2819 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2820 PUTBACK;
2821 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2822 }
2823 else
2824 {
2825 api_ready (aTHX_ cb);
2826 sv_setiv (cb, 0); /* signal waiter */
2827 }
2828
2829 SvREFCNT_dec (cb);
2830
2831 --count;
2832 }
2833}
2834
2835static int
2836slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2837{
2838 /* if we are about to throw, also stop waiting */
2839 return SvROK ((SV *)frame->data) && !CORO_THROW;
2840}
2841
2842static void
2843slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2844{
2845 AV *av = (AV *)SvRV (arg [0]);
2846
2847 if (items >= 2)
2848 {
2849 SV *cb_cv = s_get_cv_croak (arg [1]);
2850 av_push (av, SvREFCNT_inc_NN (cb_cv));
2851
2852 if (SvIVX (AvARRAY (av)[0]))
2853 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2854
2855 frame->prepare = prepare_nop;
2856 frame->check = slf_check_nop;
2857 }
2858 else if (SvIVX (AvARRAY (av)[0]))
2859 {
2860 SvIVX (AvARRAY (av)[0]) = 0;
2861 frame->prepare = prepare_nop;
2862 frame->check = slf_check_nop;
2863 }
2864 else
2865 {
2866 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2867
2868 av_push (av, waiter);
2869
2870 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2871 frame->prepare = prepare_schedule;
2872 frame->check = slf_check_signal_wait;
2873 }
2874}
2875
2876/*****************************************************************************/
2877/* Coro::AIO */
2878
2879#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2880
2881/* helper storage struct */
2882struct io_state
2883{
2884 int errorno;
2885 I32 laststype; /* U16 in 5.10.0 */
2886 int laststatval;
2887 Stat_t statcache;
2888};
2889
2890static void
2891coro_aio_callback (pTHX_ CV *cv)
2892{
2893 dXSARGS;
2894 AV *state = (AV *)S_GENSUB_ARG;
2895 SV *coro = av_pop (state);
2896 SV *data_sv = newSV (sizeof (struct io_state));
2897
2898 av_extend (state, items - 1);
2899
2900 sv_upgrade (data_sv, SVt_PV);
2901 SvCUR_set (data_sv, sizeof (struct io_state));
2902 SvPOK_only (data_sv);
2903
2904 {
2905 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2906
2907 data->errorno = errno;
2908 data->laststype = PL_laststype;
2909 data->laststatval = PL_laststatval;
2910 data->statcache = PL_statcache;
2911 }
2912
2913 /* now build the result vector out of all the parameters and the data_sv */
2914 {
2915 int i;
2916
2917 for (i = 0; i < items; ++i)
2918 av_push (state, SvREFCNT_inc_NN (ST (i)));
2919 }
2920
2921 av_push (state, data_sv);
2922
2923 api_ready (aTHX_ coro);
2924 SvREFCNT_dec (coro);
2925 SvREFCNT_dec ((AV *)state);
2926}
2927
2928static int
2929slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2930{
2931 AV *state = (AV *)frame->data;
2932
2933 /* if we are about to throw, return early */
2934 /* this does not cancel the aio request, but at least */
2935 /* it quickly returns */
2936 if (CORO_THROW)
2937 return 0;
2938
2939 /* one element that is an RV? repeat! */
2940 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2941 return 1;
2942
2943 /* restore status */
2944 {
2945 SV *data_sv = av_pop (state);
2946 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2947
2948 errno = data->errorno;
2949 PL_laststype = data->laststype;
2950 PL_laststatval = data->laststatval;
2951 PL_statcache = data->statcache;
2952
2953 SvREFCNT_dec (data_sv);
2954 }
2955
2956 /* push result values */
2957 {
2958 dSP;
2959 int i;
2960
2961 EXTEND (SP, AvFILLp (state) + 1);
2962 for (i = 0; i <= AvFILLp (state); ++i)
2963 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2964
2965 PUTBACK;
2966 }
825 2967
826 return 0; 2968 return 0;
827} 2969}
828 2970
829static void 2971static void
830api_ready (SV *coro) 2972slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
831{ 2973{
832 coro_enq (SvREFCNT_inc (coro)); 2974 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
833} 2975 SV *coro_hv = SvRV (coro_current);
2976 struct coro *coro = SvSTATE_hv (coro_hv);
834 2977
835static void 2978 /* put our coroutine id on the state arg */
836api_schedule (int cede) 2979 av_push (state, SvREFCNT_inc_NN (coro_hv));
837{
838 SV *prev, *next;
839 2980
840 prev = GvSV (coro_current); 2981 /* first see whether we have a non-zero priority and set it as AIO prio */
2982 if (coro->prio)
2983 {
2984 dSP;
841 2985
842 if (cede) 2986 static SV *prio_cv;
843 coro_enq (SvREFCNT_inc (prev)); 2987 static SV *prio_sv;
844 2988
845 next = coro_deq (PRIO_MIN); 2989 if (expect_false (!prio_cv))
2990 {
2991 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2992 prio_sv = newSViv (0);
2993 }
846 2994
847 if (!next) 2995 PUSHMARK (SP);
848 next = SvREFCNT_inc (GvSV (coro_idle)); 2996 sv_setiv (prio_sv, coro->prio);
2997 XPUSHs (prio_sv);
849 2998
850 GvSV (coro_current) = SvREFCNT_inc (next); 2999 PUTBACK;
851 transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"), 3000 call_sv (prio_cv, G_VOID | G_DISCARD);
852 sv_to_coro (next, "Coro::schedule", "next coroutine"), 3001 }
853 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
854 SvREFCNT_dec (next);
855 SvREFCNT_dec (prev);
856}
857 3002
3003 /* now call the original request */
3004 {
3005 dSP;
3006 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3007 int i;
3008
3009 PUSHMARK (SP);
3010
3011 /* first push all args to the stack */
3012 EXTEND (SP, items + 1);
3013
3014 for (i = 0; i < items; ++i)
3015 PUSHs (arg [i]);
3016
3017 /* now push the callback closure */
3018 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3019
3020 /* now call the AIO function - we assume our request is uncancelable */
3021 PUTBACK;
3022 call_sv ((SV *)req, G_VOID | G_DISCARD);
3023 }
3024
3025 /* now that the request is going, we loop till we have a result */
3026 frame->data = (void *)state;
3027 frame->prepare = prepare_schedule;
3028 frame->check = slf_check_aio_req;
3029}
3030
3031static void
3032coro_aio_req_xs (pTHX_ CV *cv)
3033{
3034 dXSARGS;
3035
3036 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3037
3038 XSRETURN_EMPTY;
3039}
3040
3041/*****************************************************************************/
3042
3043#if CORO_CLONE
3044# include "clone.c"
3045#endif
3046
3047/*****************************************************************************/
3048
3049static SV *
3050coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3051{
3052 SV *coro_sv;
3053 struct coro *coro;
3054 MAGIC *mg;
3055 HV *hv;
3056 SV *cb;
3057 int i;
3058
3059 if (argc > 0)
3060 {
3061 cb = s_get_cv_croak (argv [0]);
3062
3063 if (!is_coro)
3064 {
3065 if (CvISXSUB (cb))
3066 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3067
3068 if (!CvROOT (cb))
3069 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3070 }
3071 }
3072
3073 Newz (0, coro, 1, struct coro);
3074 coro->args = newAV ();
3075 coro->flags = CF_NEW;
3076
3077 if (coro_first) coro_first->prev = coro;
3078 coro->next = coro_first;
3079 coro_first = coro;
3080
3081 coro->hv = hv = newHV ();
3082 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3083 mg->mg_flags |= MGf_DUP;
3084 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3085
3086 if (argc > 0)
3087 {
3088 av_extend (coro->args, argc + is_coro - 1);
3089
3090 if (is_coro)
3091 {
3092 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3093 cb = (SV *)cv_coro_run;
3094 }
3095
3096 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3097
3098 for (i = 1; i < argc; i++)
3099 av_push (coro->args, newSVsv (argv [i]));
3100 }
3101
3102 return coro_sv;
3103}
3104
858MODULE = Coro::State PACKAGE = Coro::State 3105MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
859 3106
860PROTOTYPES: ENABLE 3107PROTOTYPES: DISABLE
861 3108
862BOOT: 3109BOOT:
863{ /* {} necessary for stoopid perl-5.6.x */ 3110{
864 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3111#ifdef USE_ITHREADS
865 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3112# if CORO_PTHREAD
3113 coro_thx = PERL_GET_CONTEXT;
3114# endif
3115#endif
3116 BOOT_PAGESIZE;
3117
3118 cctx_current = cctx_new_empty ();
3119
3120 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3121 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3122
3123 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3124 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3125 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3126
3127 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3128 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3129 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3130
866 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3131 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
867 3132
868 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3133 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
869 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3134 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
870 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3135 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
871 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3136 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
872
873 if (!padlist_cache)
874 padlist_cache = newHV ();
875 3137
876 main_mainstack = PL_mainstack; 3138 main_mainstack = PL_mainstack;
3139 main_top_env = PL_top_env;
3140
3141 while (main_top_env->je_prev)
3142 main_top_env = main_top_env->je_prev;
877 3143
878 { 3144 {
879 SV *sv = perl_get_sv("Coro::API", 1); 3145 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
880 3146
881 coroapi.ver = CORO_API_VERSION - 1; 3147 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
882 coroapi.transfer = api_transfer; 3148 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
883 coroapi.schedule = api_schedule;
884 coroapi.ready = api_ready;
885 coroapi.nready = &coro_nready;
886 3149
887 GCoroAPI = &coroapi; 3150 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
888 sv_setiv(sv, (IV)&coroapi); 3151 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
889 SvREADONLY_on(sv);
890 } 3152 }
891}
892 3153
893Coro::State 3154 coroapi.ver = CORO_API_VERSION;
894_newprocess(args) 3155 coroapi.rev = CORO_API_REVISION;
895 SV * args 3156
3157 coroapi.transfer = api_transfer;
3158
3159 coroapi.sv_state = SvSTATE_;
3160 coroapi.execute_slf = api_execute_slf;
3161 coroapi.prepare_nop = prepare_nop;
3162 coroapi.prepare_schedule = prepare_schedule;
3163 coroapi.prepare_cede = prepare_cede;
3164 coroapi.prepare_cede_notself = prepare_cede_notself;
3165
3166 time_init ();
3167
3168 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3169}
3170
3171SV *
3172new (SV *klass, ...)
3173 ALIAS:
3174 Coro::new = 1
3175 CODE:
3176 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3177 OUTPUT:
3178 RETVAL
3179
3180void
3181transfer (...)
3182 PROTOTYPE: $$
3183 CODE:
3184 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3185
3186bool
3187_destroy (SV *coro_sv)
3188 CODE:
3189 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3190 OUTPUT:
3191 RETVAL
3192
3193void
3194_exit (int code)
896 PROTOTYPE: $ 3195 PROTOTYPE: $
3196 CODE:
3197 _exit (code);
3198
3199SV *
3200clone (Coro::State coro)
3201 CODE:
3202{
3203#if CORO_CLONE
3204 struct coro *ncoro = coro_clone (aTHX_ coro);
3205 MAGIC *mg;
3206 /* TODO: too much duplication */
3207 ncoro->hv = newHV ();
3208 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3209 mg->mg_flags |= MGf_DUP;
3210 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3211#else
3212 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3213#endif
3214}
3215 OUTPUT:
3216 RETVAL
3217
3218int
3219cctx_stacksize (int new_stacksize = 0)
3220 PROTOTYPE: ;$
3221 CODE:
3222 RETVAL = cctx_stacksize;
3223 if (new_stacksize)
3224 {
3225 cctx_stacksize = new_stacksize;
3226 ++cctx_gen;
3227 }
3228 OUTPUT:
3229 RETVAL
3230
3231int
3232cctx_max_idle (int max_idle = 0)
3233 PROTOTYPE: ;$
3234 CODE:
3235 RETVAL = cctx_max_idle;
3236 if (max_idle > 1)
3237 cctx_max_idle = max_idle;
3238 OUTPUT:
3239 RETVAL
3240
3241int
3242cctx_count ()
3243 PROTOTYPE:
3244 CODE:
3245 RETVAL = cctx_count;
3246 OUTPUT:
3247 RETVAL
3248
3249int
3250cctx_idle ()
3251 PROTOTYPE:
3252 CODE:
3253 RETVAL = cctx_idle;
3254 OUTPUT:
3255 RETVAL
3256
3257void
3258list ()
3259 PROTOTYPE:
3260 PPCODE:
3261{
3262 struct coro *coro;
3263 for (coro = coro_first; coro; coro = coro->next)
3264 if (coro->hv)
3265 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3266}
3267
3268void
3269call (Coro::State coro, SV *coderef)
3270 ALIAS:
3271 eval = 1
3272 CODE:
3273{
3274 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3275 {
3276 struct coro *current = SvSTATE_current;
3277
3278 if (current != coro)
3279 {
3280 PUTBACK;
3281 save_perl (aTHX_ current);
3282 load_perl (aTHX_ coro);
3283 SPAGAIN;
3284 }
3285
3286 PUSHSTACK;
3287
3288 PUSHMARK (SP);
3289 PUTBACK;
3290
3291 if (ix)
3292 eval_sv (coderef, 0);
3293 else
3294 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3295
3296 POPSTACK;
3297 SPAGAIN;
3298
3299 if (current != coro)
3300 {
3301 PUTBACK;
3302 save_perl (aTHX_ coro);
3303 load_perl (aTHX_ current);
3304 SPAGAIN;
3305 }
3306 }
3307}
3308
3309SV *
3310is_ready (Coro::State coro)
3311 PROTOTYPE: $
3312 ALIAS:
3313 is_ready = CF_READY
3314 is_running = CF_RUNNING
3315 is_new = CF_NEW
3316 is_destroyed = CF_DESTROYED
3317 is_suspended = CF_SUSPENDED
3318 CODE:
3319 RETVAL = boolSV (coro->flags & ix);
3320 OUTPUT:
3321 RETVAL
3322
3323void
3324throw (Coro::State self, SV *exception = &PL_sv_undef)
3325 PROTOTYPE: $;$
897 CODE: 3326 CODE:
898 Coro__State coro; 3327{
3328 struct coro *current = SvSTATE_current;
3329 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3330 SvREFCNT_dec (*exceptionp);
3331 SvGETMAGIC (exception);
3332 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3333}
899 3334
900 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3335void
901 croak ("Coro::State::_newprocess expects an arrayref"); 3336api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3337 PROTOTYPE: $;$
3338 C_ARGS: aTHX_ coro, flags
3339
3340SV *
3341has_cctx (Coro::State coro)
3342 PROTOTYPE: $
3343 CODE:
3344 /* maybe manage the running flag differently */
3345 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3346 OUTPUT:
3347 RETVAL
3348
3349int
3350is_traced (Coro::State coro)
3351 PROTOTYPE: $
3352 CODE:
3353 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3354 OUTPUT:
3355 RETVAL
3356
3357UV
3358rss (Coro::State coro)
3359 PROTOTYPE: $
3360 ALIAS:
3361 usecount = 1
3362 CODE:
3363 switch (ix)
3364 {
3365 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3366 case 1: RETVAL = coro->usecount; break;
902 3367 }
903 New (0, coro, 1, struct coro); 3368 OUTPUT:
904
905 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
906 coro->mainstack = 0; /* actual work is done inside transfer */
907 coro->stack = 0;
908
909 RETVAL = coro; 3369 RETVAL
3370
3371void
3372force_cctx ()
3373 PROTOTYPE:
3374 CODE:
3375 cctx_current->idle_sp = 0;
3376
3377void
3378swap_defsv (Coro::State self)
3379 PROTOTYPE: $
3380 ALIAS:
3381 swap_defav = 1
3382 CODE:
3383 if (!self->slot)
3384 croak ("cannot swap state with coroutine that has no saved state,");
3385 else
3386 {
3387 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3388 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3389
3390 SV *tmp = *src; *src = *dst; *dst = tmp;
3391 }
3392
3393void
3394cancel (Coro::State self)
3395 CODE:
3396 coro_state_destroy (aTHX_ self);
3397 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3398
3399
3400SV *
3401enable_times (int enabled = enable_times)
3402 CODE:
3403{
3404 RETVAL = boolSV (enable_times);
3405
3406 if (enabled != enable_times)
3407 {
3408 enable_times = enabled;
3409
3410 coro_times_update ();
3411 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3412 }
3413}
910 OUTPUT: 3414 OUTPUT:
911 RETVAL 3415 RETVAL
912 3416
913void 3417void
914transfer(prev, next, flags) 3418times (Coro::State self)
915 Coro::State_or_hashref prev 3419 PPCODE:
916 Coro::State_or_hashref next 3420{
917 int flags 3421 struct coro *current = SvSTATE (coro_current);
918 PROTOTYPE: @ 3422
3423 if (expect_false (current == self))
3424 {
3425 coro_times_update ();
3426 coro_times_add (SvSTATE (coro_current));
3427 }
3428
3429 EXTEND (SP, 2);
3430 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3431 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3432
3433 if (expect_false (current == self))
3434 coro_times_sub (SvSTATE (coro_current));
3435}
3436
3437void
3438swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3439 CODE:
3440{
3441 struct coro *current = SvSTATE_current;
3442
3443 if (current == coro)
3444 SWAP_SVS (current);
3445
3446 if (!coro->swap_sv)
3447 coro->swap_sv = newAV ();
3448
3449 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3450 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3451
3452 if (current == coro)
3453 SWAP_SVS (current);
3454}
3455
3456
3457MODULE = Coro::State PACKAGE = Coro
3458
3459BOOT:
3460{
3461 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3462 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3463 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3464 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3465 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3466 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3467 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3468 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3469 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3470
3471 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3472 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3473 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3474 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3475
3476 coro_stash = gv_stashpv ("Coro", TRUE);
3477
3478 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3479 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3480 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3481 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3482 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3483 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3484
3485 {
3486 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3487
3488 coroapi.schedule = api_schedule;
3489 coroapi.schedule_to = api_schedule_to;
3490 coroapi.cede = api_cede;
3491 coroapi.cede_notself = api_cede_notself;
3492 coroapi.ready = api_ready;
3493 coroapi.is_ready = api_is_ready;
3494 coroapi.nready = coro_nready;
3495 coroapi.current = coro_current;
3496
3497 /*GCoroAPI = &coroapi;*/
3498 sv_setiv (sv, (IV)&coroapi);
3499 SvREADONLY_on (sv);
3500 }
3501}
3502
3503SV *
3504async (...)
3505 PROTOTYPE: &@
919 CODE: 3506 CODE:
920 PUTBACK; 3507 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
921 transfer (aTHX_ prev, next, flags); 3508 api_ready (aTHX_ RETVAL);
922 SPAGAIN; 3509 OUTPUT:
3510 RETVAL
923 3511
924void 3512void
925DESTROY(coro) 3513terminate (...)
926 Coro::State coro 3514 CODE:
927 CODE: 3515 CORO_EXECUTE_SLF_XS (slf_init_terminate);
928
929 if (coro->mainstack && coro->mainstack != main_mainstack)
930 {
931 struct coro temp;
932
933 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
934 LOAD(aTHX_ coro);
935
936 destroy_stacks (aTHX);
937
938 LOAD((&temp)); /* this will get rid of defsv etc.. */
939
940 coro->mainstack = 0;
941 }
942
943 deallocate_stack (coro);
944
945 Safefree (coro);
946 3516
947void 3517void
948flush() 3518schedule (...)
949 CODE: 3519 CODE:
950#ifdef MAY_FLUSH 3520 CORO_EXECUTE_SLF_XS (slf_init_schedule);
951 flush_padlist_cache ();
952#endif
953 3521
954void 3522void
955_exit(code) 3523schedule_to (...)
956 int code 3524 CODE:
3525 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3526
3527void
3528cede_to (...)
3529 CODE:
3530 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3531
3532void
3533cede (...)
3534 CODE:
3535 CORO_EXECUTE_SLF_XS (slf_init_cede);
3536
3537void
3538cede_notself (...)
3539 CODE:
3540 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3541
3542void
3543_set_current (SV *current)
957 PROTOTYPE: $ 3544 PROTOTYPE: $
958 CODE: 3545 CODE:
959#if defined(__GLIBC__) || _POSIX_C_SOURCE 3546 SvREFCNT_dec (SvRV (coro_current));
960 _exit (code); 3547 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
961#else
962 signal (SIGTERM, SIG_DFL);
963 raise (SIGTERM);
964 exit (code);
965#endif
966
967MODULE = Coro::State PACKAGE = Coro::Cont
968
969# this is slightly dirty (should expose a c-level api)
970 3548
971void 3549void
972yield(...) 3550_set_readyhook (SV *hook)
973 PROTOTYPE: @ 3551 PROTOTYPE: $
974 CODE: 3552 CODE:
975 static SV *returnstk;
976 SV *sv;
977 AV *defav = GvAV (PL_defgv);
978 struct coro *prev, *next;
979
980 if (!returnstk)
981 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
982
983 /* set up @_ -- ugly */
984 av_clear (defav);
985 av_fill (defav, items - 1);
986 while (items--)
987 av_store (defav, items, SvREFCNT_inc (ST(items)));
988
989 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
990 sv = av_pop ((AV *)SvRV (returnstk));
991 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
992 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
993 SvREFCNT_dec (sv); 3553 SvREFCNT_dec (coro_readyhook);
994 3554 SvGETMAGIC (hook);
995 transfer(aTHX_ prev, next, 0); 3555 if (SvOK (hook))
996 3556 {
997MODULE = Coro::State PACKAGE = Coro
998
999# this is slightly dirty (should expose a c-level api)
1000
1001BOOT:
1002{
1003 int i;
1004 HV *stash = gv_stashpv ("Coro", TRUE);
1005
1006 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1007 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1008 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1009 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1010 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1011 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1012
1013 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1014 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1015
1016 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1017 coro_ready[i] = newAV (); 3557 coro_readyhook = newSVsv (hook);
1018} 3558 CORO_READYHOOK = invoke_sv_ready_hook_helper;
3559 }
3560 else
3561 {
3562 coro_readyhook = 0;
3563 CORO_READYHOOK = 0;
3564 }
1019 3565
1020void 3566int
3567prio (Coro::State coro, int newprio = 0)
3568 PROTOTYPE: $;$
3569 ALIAS:
3570 nice = 1
3571 CODE:
3572{
3573 RETVAL = coro->prio;
3574
3575 if (items > 1)
3576 {
3577 if (ix)
3578 newprio = coro->prio - newprio;
3579
3580 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3581 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3582
3583 coro->prio = newprio;
3584 }
3585}
3586 OUTPUT:
3587 RETVAL
3588
3589SV *
1021ready(self) 3590ready (SV *self)
1022 SV * self 3591 PROTOTYPE: $
1023 CODE: 3592 CODE:
1024 api_ready (self); 3593 RETVAL = boolSV (api_ready (aTHX_ self));
3594 OUTPUT:
3595 RETVAL
1025 3596
1026int 3597int
1027nready(...) 3598nready (...)
1028 PROTOTYPE: 3599 PROTOTYPE:
1029 CODE: 3600 CODE:
1030 RETVAL = coro_nready; 3601 RETVAL = coro_nready;
1031 OUTPUT: 3602 OUTPUT:
1032 RETVAL 3603 RETVAL
1033 3604
1034void 3605void
1035schedule(...) 3606suspend (Coro::State self)
1036 PROTOTYPE: 3607 PROTOTYPE: $
1037 ALIAS:
1038 cede = 1
1039 CODE: 3608 CODE:
1040 api_schedule (ix); 3609 self->flags |= CF_SUSPENDED;
1041 3610
3611void
3612resume (Coro::State self)
3613 PROTOTYPE: $
3614 CODE:
3615 self->flags &= ~CF_SUSPENDED;
3616
3617void
3618_pool_handler (...)
3619 CODE:
3620 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3621
3622void
3623async_pool (SV *cv, ...)
3624 PROTOTYPE: &@
3625 PPCODE:
3626{
3627 HV *hv = (HV *)av_pop (av_async_pool);
3628 AV *av = newAV ();
3629 SV *cb = ST (0);
3630 int i;
3631
3632 av_extend (av, items - 2);
3633 for (i = 1; i < items; ++i)
3634 av_push (av, SvREFCNT_inc_NN (ST (i)));
3635
3636 if ((SV *)hv == &PL_sv_undef)
3637 {
3638 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3639 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3640 SvREFCNT_dec (sv);
3641 }
3642
3643 {
3644 struct coro *coro = SvSTATE_hv (hv);
3645
3646 assert (!coro->invoke_cb);
3647 assert (!coro->invoke_av);
3648 coro->invoke_cb = SvREFCNT_inc (cb);
3649 coro->invoke_av = av;
3650 }
3651
3652 api_ready (aTHX_ (SV *)hv);
3653
3654 if (GIMME_V != G_VOID)
3655 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3656 else
3657 SvREFCNT_dec (hv);
3658}
3659
3660SV *
3661rouse_cb ()
3662 PROTOTYPE:
3663 CODE:
3664 RETVAL = coro_new_rouse_cb (aTHX);
3665 OUTPUT:
3666 RETVAL
3667
3668void
3669rouse_wait (...)
3670 PROTOTYPE: ;$
3671 PPCODE:
3672 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3673
3674void
3675on_enter (SV *block)
3676 ALIAS:
3677 on_leave = 1
3678 PROTOTYPE: &
3679 CODE:
3680{
3681 struct coro *coro = SvSTATE_current;
3682 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3683
3684 block = s_get_cv_croak (block);
3685
3686 if (!*avp)
3687 *avp = newAV ();
3688
3689 av_push (*avp, SvREFCNT_inc (block));
3690
3691 if (!ix)
3692 on_enterleave_call (aTHX_ block);
3693
3694 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3695 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3696 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3697}
3698
3699
3700MODULE = Coro::State PACKAGE = PerlIO::cede
3701
3702BOOT:
3703 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3704
3705
3706MODULE = Coro::State PACKAGE = Coro::Semaphore
3707
3708SV *
3709new (SV *klass, SV *count = 0)
3710 CODE:
3711{
3712 int semcnt = 1;
3713
3714 if (count)
3715 {
3716 SvGETMAGIC (count);
3717
3718 if (SvOK (count))
3719 semcnt = SvIV (count);
3720 }
3721
3722 RETVAL = sv_bless (
3723 coro_waitarray_new (aTHX_ semcnt),
3724 GvSTASH (CvGV (cv))
3725 );
3726}
3727 OUTPUT:
3728 RETVAL
3729
3730# helper for Coro::Channel and others
3731SV *
3732_alloc (int count)
3733 CODE:
3734 RETVAL = coro_waitarray_new (aTHX_ count);
3735 OUTPUT:
3736 RETVAL
3737
3738SV *
3739count (SV *self)
3740 CODE:
3741 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3742 OUTPUT:
3743 RETVAL
3744
3745void
3746up (SV *self, int adjust = 1)
3747 ALIAS:
3748 adjust = 1
3749 CODE:
3750 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3751
3752void
3753down (...)
3754 CODE:
3755 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3756
3757void
3758wait (...)
3759 CODE:
3760 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3761
3762void
3763try (SV *self)
3764 PPCODE:
3765{
3766 AV *av = (AV *)SvRV (self);
3767 SV *count_sv = AvARRAY (av)[0];
3768 IV count = SvIVX (count_sv);
3769
3770 if (count > 0)
3771 {
3772 --count;
3773 SvIVX (count_sv) = count;
3774 XSRETURN_YES;
3775 }
3776 else
3777 XSRETURN_NO;
3778}
3779
3780void
3781waiters (SV *self)
3782 PPCODE:
3783{
3784 AV *av = (AV *)SvRV (self);
3785 int wcount = AvFILLp (av) + 1 - 1;
3786
3787 if (GIMME_V == G_SCALAR)
3788 XPUSHs (sv_2mortal (newSViv (wcount)));
3789 else
3790 {
3791 int i;
3792 EXTEND (SP, wcount);
3793 for (i = 1; i <= wcount; ++i)
3794 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3795 }
3796}
3797
3798MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3799
3800void
3801_may_delete (SV *sem, int count, int extra_refs)
3802 PPCODE:
3803{
3804 AV *av = (AV *)SvRV (sem);
3805
3806 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3807 && AvFILLp (av) == 0 /* no waiters, just count */
3808 && SvIV (AvARRAY (av)[0]) == count)
3809 XSRETURN_YES;
3810
3811 XSRETURN_NO;
3812}
3813
3814MODULE = Coro::State PACKAGE = Coro::Signal
3815
3816SV *
3817new (SV *klass)
3818 CODE:
3819 RETVAL = sv_bless (
3820 coro_waitarray_new (aTHX_ 0),
3821 GvSTASH (CvGV (cv))
3822 );
3823 OUTPUT:
3824 RETVAL
3825
3826void
3827wait (...)
3828 CODE:
3829 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3830
3831void
3832broadcast (SV *self)
3833 CODE:
3834{
3835 AV *av = (AV *)SvRV (self);
3836 coro_signal_wake (aTHX_ av, AvFILLp (av));
3837}
3838
3839void
3840send (SV *self)
3841 CODE:
3842{
3843 AV *av = (AV *)SvRV (self);
3844
3845 if (AvFILLp (av))
3846 coro_signal_wake (aTHX_ av, 1);
3847 else
3848 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3849}
3850
3851IV
3852awaited (SV *self)
3853 CODE:
3854 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3855 OUTPUT:
3856 RETVAL
3857
3858
3859MODULE = Coro::State PACKAGE = Coro::AnyEvent
3860
3861BOOT:
3862 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3863
3864void
3865_schedule (...)
3866 CODE:
3867{
3868 static int incede;
3869
3870 api_cede_notself (aTHX);
3871
3872 ++incede;
3873 while (coro_nready >= incede && api_cede (aTHX))
3874 ;
3875
3876 sv_setsv (sv_activity, &PL_sv_undef);
3877 if (coro_nready >= incede)
3878 {
3879 PUSHMARK (SP);
3880 PUTBACK;
3881 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3882 }
3883
3884 --incede;
3885}
3886
3887
3888MODULE = Coro::State PACKAGE = Coro::AIO
3889
3890void
3891_register (char *target, char *proto, SV *req)
3892 CODE:
3893{
3894 SV *req_cv = s_get_cv_croak (req);
3895 /* newXSproto doesn't return the CV on 5.8 */
3896 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3897 sv_setpv ((SV *)slf_cv, proto);
3898 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3899}
3900
3901MODULE = Coro::State PACKAGE = Coro::Select
3902
3903void
3904patch_pp_sselect ()
3905 CODE:
3906 if (!coro_old_pp_sselect)
3907 {
3908 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3909 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3910 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3911 }
3912
3913void
3914unpatch_pp_sselect ()
3915 CODE:
3916 if (coro_old_pp_sselect)
3917 {
3918 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3919 coro_old_pp_sselect = 0;
3920 }
3921

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