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Comparing Coro/Coro/State.xs (file contents):
Revision 1.36 by root, Fri Oct 5 14:20:10 2001 UTC vs.
Revision 1.388 by root, Wed Feb 23 07:14:22 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 HAS_GETTIMEOFDAY
28# undef setjmp
29# undef longjmp
30# undef _exit
31# define setjmp _setjmp /* deep magic */
32#else
33# include <inttypes.h> /* most portable stdint.h */
34#endif
8 35
9#ifdef HAVE_MMAP 36#ifdef HAVE_MMAP
10# include <unistd.h> 37# include <unistd.h>
11# include <sys/mman.h> 38# include <sys/mman.h>
12# ifndef MAP_ANONYMOUS 39# ifndef MAP_ANONYMOUS
… …
14# define MAP_ANONYMOUS MAP_ANON 41# define MAP_ANONYMOUS MAP_ANON
15# else 42# else
16# undef HAVE_MMAP 43# undef HAVE_MMAP
17# endif 44# endif
18# endif 45# endif
46# include <limits.h>
47# ifndef PAGESIZE
48# define PAGESIZE pagesize
49# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
50static long pagesize;
51# else
52# define BOOT_PAGESIZE (void)0
53# endif
54#else
55# define PAGESIZE 0
56# define BOOT_PAGESIZE (void)0
19#endif 57#endif
20 58
21#define MAY_FLUSH /* increases codesize and is rarely used */ 59#if CORO_USE_VALGRIND
60# include <valgrind/valgrind.h>
61#endif
22 62
23#define SUB_INIT "Coro::State::initialize" 63/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 64static int cctx_max_idle = 4;
25 65
26/* The next macro should declare a variable stacklevel that contains and approximation 66#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 67# undef CORO_STACKGUARD
28 * and should be unique. */ 68#endif
69
70#ifndef CORO_STACKGUARD
71# define CORO_STACKGUARD 0
72#endif
73
74/* prefer perl internal functions over our own? */
75#ifndef CORO_PREFER_PERL_FUNCTIONS
76# define CORO_PREFER_PERL_FUNCTIONS 0
77#endif
78
79/* The next macros try to return the current stack pointer, in an as
80 * portable way as possible. */
81#if __GNUC__ >= 4
82# define dSTACKLEVEL int stacklevel_dummy
83# define STACKLEVEL __builtin_frame_address (0)
84#else
85# define dSTACKLEVEL volatile void *stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 86# define STACKLEVEL ((void *)&stacklevel)
87#endif
30 88
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 89#define IN_DESTRUCT PL_dirty
32 90
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 91#if __GNUC__ >= 3
92# define attribute(x) __attribute__(x)
93# define expect(expr,value) __builtin_expect ((expr), (value))
94# define INLINE static inline
95#else
96# define attribute(x)
97# define expect(expr,value) (expr)
98# define INLINE static
99#endif
100
101#define expect_false(expr) expect ((expr) != 0, 0)
102#define expect_true(expr) expect ((expr) != 0, 1)
103
104#define NOINLINE attribute ((noinline))
34 105
35#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
36 108
109#ifdef USE_ITHREADS
110# if CORO_PTHREAD
111static void *coro_thx;
112# endif
113#endif
114
115#ifdef __linux
116# include <time.h> /* for timespec */
117# include <syscall.h> /* for SYS_* */
118# ifdef SYS_clock_gettime
119# define coro_clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
120# define CORO_CLOCK_MONOTONIC 1
121# define CORO_CLOCK_THREAD_CPUTIME_ID 3
122# endif
123#endif
124
125static double (*nvtime)(); /* so why doesn't it take void? */
126static void (*u2time)(pTHX_ UV ret[2]);
127
128/* we hijack an hopefully unused CV flag for our purposes */
129#define CVf_SLF 0x4000
130static OP *pp_slf (pTHX);
131
132static U32 cctx_gen;
133static size_t cctx_stacksize = CORO_STACKSIZE;
37static struct CoroAPI coroapi; 134static struct CoroAPI coroapi;
135static AV *main_mainstack; /* used to differentiate between $main and others */
136static JMPENV *main_top_env;
137static HV *coro_state_stash, *coro_stash;
138static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
38 139
39/* this is actually not only the c stack but also c registers etc... */ 140static AV *av_destroy; /* destruction queue */
141static SV *sv_manager; /* the manager coro */
142static SV *sv_idle; /* $Coro::idle */
143
144static GV *irsgv; /* $/ */
145static GV *stdoutgv; /* *STDOUT */
146static SV *rv_diehook;
147static SV *rv_warnhook;
148static HV *hv_sig; /* %SIG */
149
150/* async_pool helper stuff */
151static SV *sv_pool_rss;
152static SV *sv_pool_size;
153static SV *sv_async_pool_idle; /* description string */
154static AV *av_async_pool; /* idle pool */
155static SV *sv_Coro; /* class string */
156static CV *cv_pool_handler;
157
158/* Coro::AnyEvent */
159static SV *sv_activity;
160
161/* enable processtime/realtime profiling */
162static char enable_times;
163typedef U32 coro_ts[2];
164static coro_ts time_real, time_cpu;
165static char times_valid;
166
167static struct coro_cctx *cctx_first;
168static int cctx_count, cctx_idle;
169
170enum {
171 CC_MAPPED = 0x01,
172 CC_NOREUSE = 0x02, /* throw this away after tracing */
173 CC_TRACE = 0x04,
174 CC_TRACE_SUB = 0x08, /* trace sub calls */
175 CC_TRACE_LINE = 0x10, /* trace each statement */
176 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
177};
178
179/* this is a structure representing a c-level coroutine */
40typedef struct { 180typedef struct coro_cctx
41 int refcnt; /* pointer reference counter */ 181{
42 int usecnt; /* shared by how many coroutines */ 182 struct coro_cctx *next;
43 int gencnt; /* generation counter */
44 183
184 /* the stack */
185 void *sptr;
186 size_t ssize;
187
188 /* cpu state */
189 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
190 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
191 JMPENV *top_env;
45 coro_context cctx; 192 coro_context cctx;
46 193
47 void *sptr; 194 U32 gen;
48 long ssize; /* positive == mmap, otherwise malloc */ 195#if CORO_USE_VALGRIND
49} coro_stack; 196 int valgrind_id;
197#endif
198 unsigned char flags;
199} coro_cctx;
50 200
201coro_cctx *cctx_current; /* the currently running cctx */
202
203/*****************************************************************************/
204
205enum {
206 CF_RUNNING = 0x0001, /* coroutine is running */
207 CF_READY = 0x0002, /* coroutine is ready */
208 CF_NEW = 0x0004, /* has never been switched to */
209 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
210 CF_SUSPENDED = 0x0010, /* coroutine can't be scheduled */
211};
212
213/* the structure where most of the perl state is stored, overlaid on the cxstack */
214typedef struct
215{
216 SV *defsv;
217 AV *defav;
218 SV *errsv;
219 SV *irsgv;
220 HV *hinthv;
221#define VAR(name,type) type name;
222# include "state.h"
223#undef VAR
224} perl_slots;
225
226#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
227
228/* this is a structure representing a perl-level coroutine */
51struct coro { 229struct coro {
52 /* the optional C context */ 230 /* the C coroutine allocated to this perl coroutine, if any */
53 coro_stack *stack; 231 coro_cctx *cctx;
54 void *cursp;
55 int gencnt;
56 232
57 /* optionally saved, might be zero */ 233 /* ready queue */
58 AV *defav; 234 struct coro *next_ready;
59 SV *defsv;
60 SV *errsv;
61
62 /* saved global state not related to stacks */
63 U8 dowarn;
64 I32 in_eval;
65 235
66 /* the stacks and related info (callchain etc..) */ 236 /* state data */
67 PERL_SI *curstackinfo; 237 struct CoroSLF slf_frame; /* saved slf frame */
68 AV *curstack;
69 AV *mainstack; 238 AV *mainstack;
70 SV **stack_sp; 239 perl_slots *slot; /* basically the saved sp */
71 OP *op;
72 SV **curpad;
73 SV **stack_base;
74 SV **stack_max;
75 SV **tmps_stack;
76 I32 tmps_floor;
77 I32 tmps_ix;
78 I32 tmps_max;
79 I32 *markstack;
80 I32 *markstack_ptr;
81 I32 *markstack_max;
82 I32 *scopestack;
83 I32 scopestack_ix;
84 I32 scopestack_max;
85 ANY *savestack;
86 I32 savestack_ix;
87 I32 savestack_max;
88 OP **retstack;
89 I32 retstack_ix;
90 I32 retstack_max;
91 COP *curcop;
92 JMPENV *top_env;
93 240
241 CV *startcv; /* the CV to execute */
94 /* data associated with this coroutine (initial args) */ 242 AV *args; /* data associated with this coroutine (initial args) */
95 AV *args; 243 int refcnt; /* coroutines are refcounted, yes */
244 int flags; /* CF_ flags */
245 HV *hv; /* the perl hash associated with this coro, if any */
246 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
247
248 /* statistics */
249 int usecount; /* number of transfers to this coro */
250
251 /* coro process data */
252 int prio;
253 SV *except; /* exception to be thrown */
254 SV *rouse_cb;
255
256 /* async_pool */
257 SV *saved_deffh;
258 SV *invoke_cb;
259 AV *invoke_av;
260
261 /* on_enter/on_leave */
262 AV *on_enter;
263 AV *on_leave;
264
265 /* swap_sv */
266 AV *swap_sv;
267
268 /* times */
269 coro_ts t_cpu, t_real;
270
271 /* linked list */
272 struct coro *next, *prev;
96}; 273};
97 274
98typedef struct coro *Coro__State; 275typedef struct coro *Coro__State;
99typedef struct coro *Coro__State_or_hashref; 276typedef struct coro *Coro__State_or_hashref;
100 277
101static AV *main_mainstack; /* used to differentiate between $main and others */ 278/* the following variables are effectively part of the perl context */
102static HV *coro_state_stash; 279/* and get copied between struct coro and these variables */
280/* the mainr easonw e don't support windows process emulation */
281static struct CoroSLF slf_frame; /* the current slf frame */
282
283/** Coro ********************************************************************/
284
285#define CORO_PRIO_MAX 3
286#define CORO_PRIO_HIGH 1
287#define CORO_PRIO_NORMAL 0
288#define CORO_PRIO_LOW -1
289#define CORO_PRIO_IDLE -3
290#define CORO_PRIO_MIN -4
291
292/* for Coro.pm */
293static SV *coro_current;
294static SV *coro_readyhook;
295static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
296static CV *cv_coro_run, *cv_coro_terminate;
297static struct coro *coro_first;
298#define coro_nready coroapi.nready
299
300/** Coro::Select ************************************************************/
301
302static OP *(*coro_old_pp_sselect) (pTHX);
103static SV *ucoro_state_sv; 303static SV *coro_select_select;
104static U32 ucoro_state_hash;
105static HV *padlist_cache;
106 304
107/* mostly copied from op.c:cv_clone2 */ 305/* horrible hack, but if it works... */
108STATIC AV * 306static OP *
109clone_padlist (AV *protopadlist) 307coro_pp_sselect (pTHX)
110{ 308{
111 AV *av; 309 dSP;
112 I32 ix; 310 PUSHMARK (SP - 4); /* fake argument list */
113 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 311 XPUSHs (coro_select_select);
114 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 312 PUTBACK;
115 SV **pname = AvARRAY (protopad_name); 313
116 SV **ppad = AvARRAY (protopad); 314 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
117 I32 fname = AvFILLp (protopad_name); 315 PL_op->op_flags |= OPf_STACKED;
118 I32 fpad = AvFILLp (protopad); 316 PL_op->op_private = 0;
317 return PL_ppaddr [OP_ENTERSUB](aTHX);
318}
319
320/** time stuff **************************************************************/
321
322#ifdef HAS_GETTIMEOFDAY
323
324static void
325coro_u2time (pTHX_ UV ret[2])
326{
327 struct timeval tv;
328 gettimeofday (&tv, 0);
329
330 ret [0] = tv.tv_sec;
331 ret [1] = tv.tv_usec;
332}
333
334static double
335coro_nvtime ()
336{
337 struct timeval tv;
338 gettimeofday (&tv, 0);
339
340 return tv.tv_sec + tv.tv_usec * 1e-6;
341}
342
343static void
344time_init (pTHX)
345{
346 nvtime = coro_nvtime;
347 u2time = coro_u2time;
348}
349
350#else
351
352static void
353time_init (pTHX)
354{
355 SV **svp;
356
357 require_pv ("Time/HiRes.pm");
358
359 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
360
361 if (!svp) croak ("Time::HiRes is required, but missing.");
362 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
363
364 nvtime = INT2PTR (double (*)(), SvIV (*svp));
365
366 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
367 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
368}
369
370#endif
371
372/** lowlevel stuff **********************************************************/
373
374static SV *
375coro_get_sv (pTHX_ const char *name, int create)
376{
377#if PERL_VERSION_ATLEAST (5,10,0)
378 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
379 get_sv (name, create);
380#endif
381 return get_sv (name, create);
382}
383
384static AV *
385coro_get_av (pTHX_ const char *name, int create)
386{
387#if PERL_VERSION_ATLEAST (5,10,0)
388 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
389 get_av (name, create);
390#endif
391 return get_av (name, create);
392}
393
394static HV *
395coro_get_hv (pTHX_ const char *name, int create)
396{
397#if PERL_VERSION_ATLEAST (5,10,0)
398 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
399 get_hv (name, create);
400#endif
401 return get_hv (name, create);
402}
403
404INLINE void
405coro_times_update ()
406{
407#ifdef coro_clock_gettime
408 struct timespec ts;
409
410 ts.tv_sec = ts.tv_nsec = 0;
411 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
412 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
413
414 ts.tv_sec = ts.tv_nsec = 0;
415 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
416 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
417#else
418 dTHX;
419 UV tv[2];
420
421 u2time (aTHX_ tv);
422 time_real [0] = tv [0];
423 time_real [1] = tv [1] * 1000;
424#endif
425}
426
427INLINE void
428coro_times_add (struct coro *c)
429{
430 c->t_real [1] += time_real [1];
431 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
432 c->t_real [0] += time_real [0];
433
434 c->t_cpu [1] += time_cpu [1];
435 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
436 c->t_cpu [0] += time_cpu [0];
437}
438
439INLINE void
440coro_times_sub (struct coro *c)
441{
442 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
443 c->t_real [1] -= time_real [1];
444 c->t_real [0] -= time_real [0];
445
446 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
447 c->t_cpu [1] -= time_cpu [1];
448 c->t_cpu [0] -= time_cpu [0];
449}
450
451/*****************************************************************************/
452/* magic glue */
453
454#define CORO_MAGIC_type_cv 26
455#define CORO_MAGIC_type_state PERL_MAGIC_ext
456
457#define CORO_MAGIC_NN(sv, type) \
458 (expect_true (SvMAGIC (sv)->mg_type == type) \
459 ? SvMAGIC (sv) \
460 : mg_find (sv, type))
461
462#define CORO_MAGIC(sv, type) \
463 (expect_true (SvMAGIC (sv)) \
464 ? CORO_MAGIC_NN (sv, type) \
465 : 0)
466
467#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
468#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
469
470INLINE struct coro *
471SvSTATE_ (pTHX_ SV *coro)
472{
473 HV *stash;
474 MAGIC *mg;
475
476 if (SvROK (coro))
477 coro = SvRV (coro);
478
479 if (expect_false (SvTYPE (coro) != SVt_PVHV))
480 croak ("Coro::State object required");
481
482 stash = SvSTASH (coro);
483 if (expect_false (stash != coro_stash && stash != coro_state_stash))
484 {
485 /* very slow, but rare, check */
486 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
487 croak ("Coro::State object required");
488 }
489
490 mg = CORO_MAGIC_state (coro);
491 return (struct coro *)mg->mg_ptr;
492}
493
494#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
495
496/* faster than SvSTATE, but expects a coroutine hv */
497#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
498#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
499
500/*****************************************************************************/
501/* padlist management and caching */
502
503static AV *
504coro_derive_padlist (pTHX_ CV *cv)
505{
506 AV *padlist = CvPADLIST (cv);
119 AV *newpadlist, *newpad_name, *newpad; 507 AV *newpadlist, *newpad;
120 SV **npad;
121
122 newpad_name = newAV ();
123 for (ix = fname; ix >= 0; ix--)
124 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125
126 newpad = newAV ();
127 av_fill (newpad, AvFILLp (protopad));
128 npad = AvARRAY (newpad);
129 508
130 newpadlist = newAV (); 509 newpadlist = newAV ();
131 AvREAL_off (newpadlist); 510 AvREAL_off (newpadlist);
132 av_store (newpadlist, 0, (SV *) newpad_name); 511#if PERL_VERSION_ATLEAST (5,10,0)
512 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
513#else
514 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
515#endif
516 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
517 --AvFILLp (padlist);
518
519 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
133 av_store (newpadlist, 1, (SV *) newpad); 520 av_store (newpadlist, 1, (SV *)newpad);
134 521
135 av = newAV (); /* will be @_ */ 522 return newpadlist;
136 av_extend (av, 0); 523}
137 av_store (newpad, 0, (SV *) av);
138 AvFLAGS (av) = AVf_REIFY;
139 524
140 for (ix = fpad; ix > 0; ix--) 525static void
526free_padlist (pTHX_ AV *padlist)
527{
528 /* may be during global destruction */
529 if (!IN_DESTRUCT)
141 { 530 {
142 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 531 I32 i = AvFILLp (padlist);
143 if (namesv && namesv != &PL_sv_undef) 532
533 while (i > 0) /* special-case index 0 */
144 { 534 {
145 char *name = SvPVX (namesv); /* XXX */ 535 /* we try to be extra-careful here */
146 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 536 AV *av = (AV *)AvARRAY (padlist)[i--];
147 { /* lexical from outside? */ 537 I32 j = AvFILLp (av);
148 npad[ix] = SvREFCNT_inc (ppad[ix]); 538
149 } 539 while (j >= 0)
150 else 540 SvREFCNT_dec (AvARRAY (av)[j--]);
151 { /* our own lexical */ 541
152 SV *sv; 542 AvFILLp (av) = -1;
153 if (*name == '&') 543 SvREFCNT_dec (av);
154 sv = SvREFCNT_inc (ppad[ix]);
155 else if (*name == '@')
156 sv = (SV *) newAV ();
157 else if (*name == '%')
158 sv = (SV *) newHV ();
159 else
160 sv = NEWSV (0, 0);
161 if (!SvPADBUSY (sv))
162 SvPADMY_on (sv);
163 npad[ix] = sv;
164 }
165 } 544 }
166 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 545
167 { 546 SvREFCNT_dec (AvARRAY (padlist)[0]);
168 npad[ix] = SvREFCNT_inc (ppad[ix]); 547
169 } 548 AvFILLp (padlist) = -1;
549 SvREFCNT_dec ((SV*)padlist);
550 }
551}
552
553static int
554coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
555{
556 AV *padlist;
557 AV *av = (AV *)mg->mg_obj;
558
559 /* perl manages to free our internal AV and _then_ call us */
560 if (IN_DESTRUCT)
561 return 0;
562
563 /* casting is fun. */
564 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
565 free_padlist (aTHX_ padlist);
566
567 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
568
569 return 0;
570}
571
572static MGVTBL coro_cv_vtbl = {
573 0, 0, 0, 0,
574 coro_cv_free
575};
576
577/* the next two functions merely cache the padlists */
578static void
579get_padlist (pTHX_ CV *cv)
580{
581 MAGIC *mg = CORO_MAGIC_cv (cv);
582 AV *av;
583
584 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
585 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
170 else 586 else
171 { 587 {
172 SV *sv = NEWSV (0, 0); 588#if CORO_PREFER_PERL_FUNCTIONS
173 SvPADTMP_on (sv); 589 /* this is probably cleaner? but also slower! */
174 npad[ix] = sv; 590 /* in practise, it seems to be less stable */
175 } 591 CV *cp = Perl_cv_clone (aTHX_ cv);
176 } 592 CvPADLIST (cv) = CvPADLIST (cp);
177 593 CvPADLIST (cp) = 0;
178#if 0 /* return -ENOTUNDERSTOOD */ 594 SvREFCNT_dec (cp);
179 /* Now that vars are all in place, clone nested closures. */ 595#else
180 596 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
181 for (ix = fpad; ix > 0; ix--) {
182 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
183 if (namesv
184 && namesv != &PL_sv_undef
185 && !(SvFLAGS(namesv) & SVf_FAKE)
186 && *SvPVX(namesv) == '&'
187 && CvCLONE(ppad[ix]))
188 {
189 CV *kid = cv_clone((CV*)ppad[ix]);
190 SvREFCNT_dec(ppad[ix]);
191 CvCLONE_on(kid);
192 SvPADMY_on(kid);
193 npad[ix] = (SV*)kid;
194 }
195 }
196#endif 597#endif
197 598 }
198 return newpadlist;
199} 599}
200 600
201#ifdef MAY_FLUSH 601static void
202STATIC void 602put_padlist (pTHX_ CV *cv)
203free_padlist (AV *padlist)
204{ 603{
205 /* may be during global destruction */ 604 MAGIC *mg = CORO_MAGIC_cv (cv);
206 if (SvREFCNT(padlist)) 605 AV *av;
606
607 if (expect_false (!mg))
608 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
609
610 av = (AV *)mg->mg_obj;
611
612 if (expect_false (AvFILLp (av) >= AvMAX (av)))
613 av_extend (av, AvFILLp (av) + 1);
614
615 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
616}
617
618/** load & save, init *******************************************************/
619
620/* swap sv heads, at least logically */
621static void
622swap_svs (pTHX_ Coro__State c)
623{
624 int i;
625
626 for (i = 0; i <= AvFILLp (c->swap_sv); )
207 { 627 {
208 I32 i = AvFILLp(padlist); 628 SV *a = AvARRAY (c->swap_sv)[i++];
209 while (i >= 0) 629 SV *b = AvARRAY (c->swap_sv)[i++];
630
631 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
632 SV tmp;
633
634 /* swap sv_any */
635 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
636
637 /* swap sv_flags */
638 SvFLAGS (&tmp) = SvFLAGS (a);
639 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
640 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
641
642#if PERL_VERSION_ATLEAST (5,10,0)
643 /* perl 5.10 complicates this _quite_ a bit, but it also is
644 * much faster, so no quarrels here. alternatively, we could
645 * sv_upgrade to avoid this.
646 */
210 { 647 {
211 SV **svp = av_fetch(padlist, i--, FALSE); 648 /* swap sv_u */
212 SV *sv = svp ? *svp : Nullsv; 649 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
213 if (sv) 650
214 SvREFCNT_dec(sv); 651 /* if SvANY points to the head, we need to adjust the pointers,
652 * as the pointer for a still points to b, and maybe vice versa.
653 */
654 #define svany_in_head(type) \
655 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
656
657 if (svany_in_head (SvTYPE (a)))
658 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
659
660 if (svany_in_head (SvTYPE (b)))
661 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
215 } 662 }
216
217 SvREFCNT_dec((SV*)padlist);
218 }
219}
220#endif 663#endif
221
222/* the next two functions merely cache the padlists */
223STATIC void
224get_padlist (CV *cv)
225{
226 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
227
228 if (he && AvFILLp ((AV *)*he) >= 0)
229 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
230 else
231 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232}
233
234STATIC void
235put_padlist (CV *cv)
236{
237 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
238
239 if (SvTYPE (*he) != SVt_PVAV)
240 { 664 }
241 SvREFCNT_dec (*he);
242 *he = (SV *)newAV ();
243 }
244
245 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
246} 665}
247 666
248#ifdef MAY_FLUSH 667#define SWAP_SVS(coro) \
249STATIC void 668 if (expect_false ((coro)->swap_sv)) \
250flush_padlist_cache () 669 swap_svs (aTHX_ (coro))
251{
252 HV *hv = padlist_cache;
253 padlist_cache = newHV ();
254 670
255 if (hv_iterinit (hv))
256 {
257 HE *he;
258 AV *padlist;
259
260 while (!!(he = hv_iternext (hv)))
261 {
262 AV *av = (AV *)HeVAL(he);
263
264 /* casting is fun. */
265 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266 free_padlist (padlist);
267 }
268 }
269
270 SvREFCNT_dec (hv);
271}
272#endif
273
274#define SB do {
275#define SE } while (0)
276
277#define LOAD(state) load_state(aTHX_ (state));
278#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
279
280#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
281
282static void 671static void
672on_enterleave_call (pTHX_ SV *cb);
673
674static void
283load_state(pTHX_ Coro__State c) 675load_perl (pTHX_ Coro__State c)
284{ 676{
285 PL_dowarn = c->dowarn; 677 perl_slots *slot = c->slot;
286 PL_in_eval = c->in_eval; 678 c->slot = 0;
287 679
288 PL_curstackinfo = c->curstackinfo;
289 PL_curstack = c->curstack;
290 PL_mainstack = c->mainstack; 680 PL_mainstack = c->mainstack;
291 PL_stack_sp = c->stack_sp;
292 PL_op = c->op;
293 PL_curpad = c->curpad;
294 PL_stack_base = c->stack_base;
295 PL_stack_max = c->stack_max;
296 PL_tmps_stack = c->tmps_stack;
297 PL_tmps_floor = c->tmps_floor;
298 PL_tmps_ix = c->tmps_ix;
299 PL_tmps_max = c->tmps_max;
300 PL_markstack = c->markstack;
301 PL_markstack_ptr = c->markstack_ptr;
302 PL_markstack_max = c->markstack_max;
303 PL_scopestack = c->scopestack;
304 PL_scopestack_ix = c->scopestack_ix;
305 PL_scopestack_max = c->scopestack_max;
306 PL_savestack = c->savestack;
307 PL_savestack_ix = c->savestack_ix;
308 PL_savestack_max = c->savestack_max;
309 PL_retstack = c->retstack;
310 PL_retstack_ix = c->retstack_ix;
311 PL_retstack_max = c->retstack_max;
312 PL_curcop = c->curcop;
313 PL_top_env = c->top_env;
314 681
315 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 682 GvSV (PL_defgv) = slot->defsv;
316 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 683 GvAV (PL_defgv) = slot->defav;
317 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 684 GvSV (PL_errgv) = slot->errsv;
685 GvSV (irsgv) = slot->irsgv;
686 GvHV (PL_hintgv) = slot->hinthv;
687
688 #define VAR(name,type) PL_ ## name = slot->name;
689 # include "state.h"
690 #undef VAR
318 691
319 { 692 {
320 dSP; 693 dSP;
694
321 CV *cv; 695 CV *cv;
322 696
323 /* now do the ugly restore mess */ 697 /* now do the ugly restore mess */
324 while ((cv = (CV *)POPs)) 698 while (expect_true (cv = (CV *)POPs))
325 { 699 {
326 AV *padlist = (AV *)POPs;
327
328 if (padlist)
329 {
330 put_padlist (cv); /* mark this padlist as available */ 700 put_padlist (aTHX_ cv); /* mark this padlist as available */
331 CvPADLIST(cv) = padlist; 701 CvDEPTH (cv) = PTR2IV (POPs);
332#ifdef USE_THREADS 702 CvPADLIST (cv) = (AV *)POPs;
333 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
334#endif
335 }
336
337 ++CvDEPTH(cv);
338 } 703 }
339 704
340 PUTBACK; 705 PUTBACK;
341 } 706 }
342}
343 707
708 slf_frame = c->slf_frame;
709 CORO_THROW = c->except;
710
711 if (expect_false (enable_times))
712 {
713 if (expect_false (!times_valid))
714 coro_times_update ();
715
716 coro_times_sub (c);
717 }
718
719 if (expect_false (c->on_enter))
720 {
721 int i;
722
723 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
724 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
725 }
726
727 SWAP_SVS (c);
728}
729
344static void 730static void
345save_state(pTHX_ Coro__State c, int flags) 731save_perl (pTHX_ Coro__State c)
346{ 732{
733 SWAP_SVS (c);
734
735 if (expect_false (c->on_leave))
736 {
737 int i;
738
739 for (i = AvFILLp (c->on_leave); i >= 0; --i)
740 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
741 }
742
743 times_valid = 0;
744
745 if (expect_false (enable_times))
746 {
747 coro_times_update (); times_valid = 1;
748 coro_times_add (c);
749 }
750
751 c->except = CORO_THROW;
752 c->slf_frame = slf_frame;
753
347 { 754 {
348 dSP; 755 dSP;
349 I32 cxix = cxstack_ix; 756 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack; 757 PERL_CONTEXT *ccstk = cxstack;
351 PERL_SI *top_si = PL_curstackinfo; 758 PERL_SI *top_si = PL_curstackinfo;
… …
353 /* 760 /*
354 * the worst thing you can imagine happens first - we have to save 761 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :( 762 * (and reinitialize) all cv's in the whole callchain :(
356 */ 763 */
357 764
358 PUSHs (Nullsv); 765 XPUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */ 766 /* this loop was inspired by pp_caller */
360 for (;;) 767 for (;;)
361 { 768 {
362 while (cxix >= 0) 769 while (expect_true (cxix >= 0))
363 { 770 {
364 PERL_CONTEXT *cx = &ccstk[cxix--]; 771 PERL_CONTEXT *cx = &ccstk[cxix--];
365 772
366 if (CxTYPE(cx) == CXt_SUB) 773 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
367 { 774 {
368 CV *cv = cx->blk_sub.cv; 775 CV *cv = cx->blk_sub.cv;
776
369 if (CvDEPTH(cv)) 777 if (expect_true (CvDEPTH (cv)))
370 { 778 {
371#ifdef USE_THREADS
372 /*XPUSHs ((SV *)CvOWNER(cv));*/
373 /*CvOWNER(cv) = 0;*/
374 /*error must unlock this cv etc.. etc...*/
375#endif
376 EXTEND (SP, CvDEPTH(cv)*2); 779 EXTEND (SP, 3);
377
378 while (--CvDEPTH(cv))
379 {
380 /* this tells the restore code to increment CvDEPTH */
381 PUSHs (Nullsv);
382 PUSHs ((SV *)cv);
383 }
384
385 PUSHs ((SV *)CvPADLIST(cv)); 780 PUSHs ((SV *)CvPADLIST (cv));
781 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
386 PUSHs ((SV *)cv); 782 PUSHs ((SV *)cv);
387 783
388 get_padlist (cv); /* this is a monster */ 784 CvDEPTH (cv) = 0;
785 get_padlist (aTHX_ cv);
389 } 786 }
390 } 787 }
391 else if (CxTYPE(cx) == CXt_FORMAT)
392 {
393 /* I never used formats, so how should I know how these are implemented? */
394 /* my bold guess is as a simple, plain sub... */
395 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396 }
397 } 788 }
398 789
399 if (top_si->si_type == PERLSI_MAIN) 790 if (expect_true (top_si->si_type == PERLSI_MAIN))
400 break; 791 break;
401 792
402 top_si = top_si->si_prev; 793 top_si = top_si->si_prev;
403 ccstk = top_si->si_cxstack; 794 ccstk = top_si->si_cxstack;
404 cxix = top_si->si_cxix; 795 cxix = top_si->si_cxix;
405 } 796 }
406 797
407 PUTBACK; 798 PUTBACK;
408 } 799 }
409 800
410 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 801 /* allocate some space on the context stack for our purposes */
411 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 802 /* we manually unroll here, as usually 2 slots is enough */
412 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 803 if (SLOT_COUNT >= 1) CXINC;
804 if (SLOT_COUNT >= 2) CXINC;
805 if (SLOT_COUNT >= 3) CXINC;
806 {
807 unsigned int i;
808 for (i = 3; i < SLOT_COUNT; ++i)
809 CXINC;
810 }
811 cxstack_ix -= SLOT_COUNT; /* undo allocation */
413 812
414 c->dowarn = PL_dowarn;
415 c->in_eval = PL_in_eval;
416
417 c->curstackinfo = PL_curstackinfo;
418 c->curstack = PL_curstack;
419 c->mainstack = PL_mainstack; 813 c->mainstack = PL_mainstack;
420 c->stack_sp = PL_stack_sp; 814
421 c->op = PL_op; 815 {
422 c->curpad = PL_curpad; 816 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
423 c->stack_base = PL_stack_base; 817
424 c->stack_max = PL_stack_max; 818 slot->defav = GvAV (PL_defgv);
425 c->tmps_stack = PL_tmps_stack; 819 slot->defsv = DEFSV;
426 c->tmps_floor = PL_tmps_floor; 820 slot->errsv = ERRSV;
427 c->tmps_ix = PL_tmps_ix; 821 slot->irsgv = GvSV (irsgv);
428 c->tmps_max = PL_tmps_max; 822 slot->hinthv = GvHV (PL_hintgv);
429 c->markstack = PL_markstack; 823
430 c->markstack_ptr = PL_markstack_ptr; 824 #define VAR(name,type) slot->name = PL_ ## name;
431 c->markstack_max = PL_markstack_max; 825 # include "state.h"
432 c->scopestack = PL_scopestack; 826 #undef VAR
433 c->scopestack_ix = PL_scopestack_ix; 827 }
434 c->scopestack_max = PL_scopestack_max;
435 c->savestack = PL_savestack;
436 c->savestack_ix = PL_savestack_ix;
437 c->savestack_max = PL_savestack_max;
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441 c->curcop = PL_curcop;
442 c->top_env = PL_top_env;
443} 828}
444 829
445/* 830/*
446 * allocate various perl stacks. This is an exact copy 831 * allocate various perl stacks. This is almost an exact copy
447 * of perl.c:init_stacks, except that it uses less memory 832 * of perl.c:init_stacks, except that it uses less memory
448 * on the assumption that coroutines do not usually need 833 * on the (sometimes correct) assumption that coroutines do
449 * a lot of stackspace. 834 * not usually need a lot of stackspace.
450 */ 835 */
451STATIC void 836#if CORO_PREFER_PERL_FUNCTIONS
837# define coro_init_stacks(thx) init_stacks ()
838#else
839static void
452coro_init_stacks (pTHX) 840coro_init_stacks (pTHX)
453{ 841{
454 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 842 PL_curstackinfo = new_stackinfo(32, 8);
455 PL_curstackinfo->si_type = PERLSI_MAIN; 843 PL_curstackinfo->si_type = PERLSI_MAIN;
456 PL_curstack = PL_curstackinfo->si_stack; 844 PL_curstack = PL_curstackinfo->si_stack;
457 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 845 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
458 846
459 PL_stack_base = AvARRAY(PL_curstack); 847 PL_stack_base = AvARRAY(PL_curstack);
460 PL_stack_sp = PL_stack_base; 848 PL_stack_sp = PL_stack_base;
461 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 849 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
462 850
463 New(50,PL_tmps_stack,96,SV*); 851 New(50,PL_tmps_stack,32,SV*);
464 PL_tmps_floor = -1; 852 PL_tmps_floor = -1;
465 PL_tmps_ix = -1; 853 PL_tmps_ix = -1;
466 PL_tmps_max = 96; 854 PL_tmps_max = 32;
467 855
468 New(54,PL_markstack,16,I32); 856 New(54,PL_markstack,16,I32);
469 PL_markstack_ptr = PL_markstack; 857 PL_markstack_ptr = PL_markstack;
470 PL_markstack_max = PL_markstack + 16; 858 PL_markstack_max = PL_markstack + 16;
471 859
860#ifdef SET_MARK_OFFSET
472 SET_MARK_OFFSET; 861 SET_MARK_OFFSET;
862#endif
473 863
474 New(54,PL_scopestack,16,I32); 864 New(54,PL_scopestack,8,I32);
475 PL_scopestack_ix = 0; 865 PL_scopestack_ix = 0;
476 PL_scopestack_max = 16; 866 PL_scopestack_max = 8;
477 867
478 New(54,PL_savestack,96,ANY); 868 New(54,PL_savestack,24,ANY);
479 PL_savestack_ix = 0; 869 PL_savestack_ix = 0;
480 PL_savestack_max = 96; 870 PL_savestack_max = 24;
481 871
872#if !PERL_VERSION_ATLEAST (5,10,0)
482 New(54,PL_retstack,8,OP*); 873 New(54,PL_retstack,4,OP*);
483 PL_retstack_ix = 0; 874 PL_retstack_ix = 0;
484 PL_retstack_max = 8; 875 PL_retstack_max = 4;
876#endif
485} 877}
878#endif
486 879
487/* 880/*
488 * destroy the stacks, the callchain etc... 881 * destroy the stacks, the callchain etc...
489 * still there is a memleak of 128 bytes...
490 */ 882 */
491STATIC void 883static void
492destroy_stacks(pTHX) 884coro_destruct_stacks (pTHX)
493{ 885{
494 if (!IN_DESTRUCT)
495 {
496 /* is this ugly, I ask? */
497 while (PL_scopestack_ix)
498 LEAVE;
499
500 /* sure it is, but more important: is it correct?? :/ */
501 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502 FREETMPS;
503 }
504
505 while (PL_curstackinfo->si_next) 886 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 887 PL_curstackinfo = PL_curstackinfo->si_next;
507 888
508 while (PL_curstackinfo) 889 while (PL_curstackinfo)
509 { 890 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 891 PERL_SI *p = PL_curstackinfo->si_prev;
511 892
512 {
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT) 893 if (!IN_DESTRUCT)
519 {
520 dounwind(-1);
521 SvREFCNT_dec(PL_curstackinfo->si_stack); 894 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 895
524 Safefree(PL_curstackinfo->si_cxstack); 896 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree(PL_curstackinfo); 897 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 898 PL_curstackinfo = p;
527 } 899 }
528 900
529 Safefree(PL_tmps_stack); 901 Safefree (PL_tmps_stack);
530 Safefree(PL_markstack); 902 Safefree (PL_markstack);
531 Safefree(PL_scopestack); 903 Safefree (PL_scopestack);
532 Safefree(PL_savestack); 904 Safefree (PL_savestack);
905#if !PERL_VERSION_ATLEAST (5,10,0)
533 Safefree(PL_retstack); 906 Safefree (PL_retstack);
534}
535
536static void
537allocate_stack (Coro__State ctx, int alloc)
538{
539 coro_stack *stack;
540
541 New (0, stack, 1, coro_stack);
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546 if (alloc)
547 {
548#ifdef HAVE_MMAP
549 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551 if (stack->sptr == (void *)-1)
552#endif 907#endif
908}
909
910#define CORO_RSS \
911 rss += sizeof (SYM (curstackinfo)); \
912 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
913 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
914 rss += SYM (tmps_max) * sizeof (SV *); \
915 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
916 rss += SYM (scopestack_max) * sizeof (I32); \
917 rss += SYM (savestack_max) * sizeof (ANY);
918
919static size_t
920coro_rss (pTHX_ struct coro *coro)
921{
922 size_t rss = sizeof (*coro);
923
924 if (coro->mainstack)
925 {
926 if (coro->flags & CF_RUNNING)
553 { 927 {
554 /*FIXME*//*D*//* reasonable stack size! */ 928 #define SYM(sym) PL_ ## sym
555 stack->ssize = -4096 * sizeof (long); 929 CORO_RSS;
556 New (0, stack->sptr, 4096, long); 930 #undef SYM
557 } 931 }
558 }
559 else 932 else
560 stack->sptr = 0;
561
562 ctx->stack = stack;
563}
564
565static void
566deallocate_stack (Coro__State ctx)
567{
568 coro_stack *stack = ctx->stack;
569
570 ctx->stack = 0;
571
572 if (stack)
573 {
574 if (!--stack->refcnt)
575 { 933 {
576#ifdef HAVE_MMAP 934 #define SYM(sym) coro->slot->sym
577 if (stack->ssize > 0 && stack->sptr) 935 CORO_RSS;
578 munmap (stack->sptr, stack->ssize); 936 #undef SYM
579 else 937 }
580#else 938 }
581 Safefree (stack->sptr); 939
940 return rss;
941}
942
943/** coroutine stack handling ************************************************/
944
945static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
946static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
947static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
948
949/* apparently < 5.8.8 */
950#ifndef MgPV_nolen_const
951#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
952 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
953 (const char*)(mg)->mg_ptr)
582#endif 954#endif
583 Safefree (stack); 955
956/*
957 * This overrides the default magic get method of %SIG elements.
958 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
959 * and instead of trying to save and restore the hash elements, we just provide
960 * readback here.
961 */
962static int
963coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
964{
965 const char *s = MgPV_nolen_const (mg);
966
967 if (*s == '_')
968 {
969 SV **svp = 0;
970
971 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
972 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
973
974 if (svp)
975 {
976 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
977 return 0;
584 } 978 }
585 else if (ctx->gencnt == stack->gencnt) 979 }
586 --stack->usecnt; 980
981 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
982}
983
984static int
985coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
986{
987 const char *s = MgPV_nolen_const (mg);
988
989 if (*s == '_')
587 } 990 {
588} 991 SV **svp = 0;
589 992
993 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
994 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
995
996 if (svp)
997 {
998 SV *old = *svp;
999 *svp = 0;
1000 SvREFCNT_dec (old);
1001 return 0;
1002 }
1003 }
1004
1005 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1006}
1007
590static void 1008static int
591setup_coro (void *arg) 1009coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1010{
1011 const char *s = MgPV_nolen_const (mg);
1012
1013 if (*s == '_')
1014 {
1015 SV **svp = 0;
1016
1017 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1018 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1019
1020 if (svp)
1021 {
1022 SV *old = *svp;
1023 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1024 SvREFCNT_dec (old);
1025 return 0;
1026 }
1027 }
1028
1029 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1030}
1031
1032static void
1033prepare_nop (pTHX_ struct coro_transfer_args *ta)
1034{
1035 /* kind of mega-hacky, but works */
1036 ta->next = ta->prev = (struct coro *)ta;
1037}
1038
1039static int
1040slf_check_nop (pTHX_ struct CoroSLF *frame)
1041{
1042 return 0;
1043}
1044
1045static int
1046slf_check_repeat (pTHX_ struct CoroSLF *frame)
1047{
1048 return 1;
1049}
1050
1051static UNOP init_perl_op;
1052
1053static void NOINLINE /* noinline to keep it out of the transfer fast path */
1054init_perl (pTHX_ struct coro *coro)
592{ 1055{
593 /* 1056 /*
594 * emulate part of the perl startup here. 1057 * emulate part of the perl startup here.
595 */ 1058 */
1059 coro_init_stacks (aTHX);
1060
1061 PL_runops = RUNOPS_DEFAULT;
1062 PL_curcop = &PL_compiling;
1063 PL_in_eval = EVAL_NULL;
1064 PL_comppad = 0;
1065 PL_comppad_name = 0;
1066 PL_comppad_name_fill = 0;
1067 PL_comppad_name_floor = 0;
1068 PL_curpm = 0;
1069 PL_curpad = 0;
1070 PL_localizing = 0;
1071 PL_restartop = 0;
1072#if PERL_VERSION_ATLEAST (5,10,0)
1073 PL_parser = 0;
1074#endif
1075 PL_hints = 0;
1076
1077 /* recreate the die/warn hooks */
1078 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1079 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1080
1081 GvSV (PL_defgv) = newSV (0);
1082 GvAV (PL_defgv) = coro->args; coro->args = 0;
1083 GvSV (PL_errgv) = newSV (0);
1084 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1085 GvHV (PL_hintgv) = 0;
1086 PL_rs = newSVsv (GvSV (irsgv));
1087 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1088
1089 {
1090 dSP;
1091 UNOP myop;
1092
1093 Zero (&myop, 1, UNOP);
1094 myop.op_next = Nullop;
1095 myop.op_type = OP_ENTERSUB;
1096 myop.op_flags = OPf_WANT_VOID;
1097
1098 PUSHMARK (SP);
1099 PUSHs ((SV *)coro->startcv);
1100 PUTBACK;
1101 PL_op = (OP *)&myop;
1102 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1103 }
1104
1105 /* this newly created coroutine might be run on an existing cctx which most
1106 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1107 */
1108 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1109 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1110
1111 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1112 init_perl_op.op_next = PL_op;
1113 init_perl_op.op_type = OP_ENTERSUB;
1114 init_perl_op.op_ppaddr = pp_slf;
1115 /* no flags etc. required, as an init function won't be called */
1116
1117 PL_op = (OP *)&init_perl_op;
1118
1119 /* copy throw, in case it was set before init_perl */
1120 CORO_THROW = coro->except;
1121
1122 SWAP_SVS (coro);
1123
1124 if (expect_false (enable_times))
1125 {
1126 coro_times_update ();
1127 coro_times_sub (coro);
1128 }
1129}
1130
1131static void
1132coro_unwind_stacks (pTHX)
1133{
1134 if (!IN_DESTRUCT)
1135 {
1136 /* restore all saved variables and stuff */
1137 LEAVE_SCOPE (0);
1138 assert (PL_tmps_floor == -1);
1139
1140 /* free all temporaries */
1141 FREETMPS;
1142 assert (PL_tmps_ix == -1);
1143
1144 /* unwind all extra stacks */
1145 POPSTACK_TO (PL_mainstack);
1146
1147 /* unwind main stack */
1148 dounwind (-1);
1149 }
1150}
1151
1152static void
1153destroy_perl (pTHX_ struct coro *coro)
1154{
1155 SV *svf [9];
1156
1157 {
1158 struct coro *current = SvSTATE_current;
1159
1160 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1161
1162 save_perl (aTHX_ current);
1163 load_perl (aTHX_ coro);
1164
1165 coro_unwind_stacks (aTHX);
1166 coro_destruct_stacks (aTHX);
1167
1168 /* restore swapped sv's */
1169 SWAP_SVS (coro);
1170
1171 // now save some sv's to be free'd later
1172 svf [0] = GvSV (PL_defgv);
1173 svf [1] = (SV *)GvAV (PL_defgv);
1174 svf [2] = GvSV (PL_errgv);
1175 svf [3] = (SV *)PL_defoutgv;
1176 svf [4] = PL_rs;
1177 svf [5] = GvSV (irsgv);
1178 svf [6] = (SV *)GvHV (PL_hintgv);
1179 svf [7] = PL_diehook;
1180 svf [8] = PL_warnhook;
1181 assert (9 == sizeof (svf) / sizeof (*svf));
1182
1183 load_perl (aTHX_ current);
1184 }
1185
1186 {
1187 unsigned int i;
1188
1189 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1190 SvREFCNT_dec (svf [i]);
1191
1192 SvREFCNT_dec (coro->saved_deffh);
1193 SvREFCNT_dec (coro->rouse_cb);
1194 SvREFCNT_dec (coro->invoke_cb);
1195 SvREFCNT_dec (coro->invoke_av);
1196 }
1197}
1198
1199INLINE void
1200free_coro_mortal (pTHX)
1201{
1202 if (expect_true (coro_mortal))
1203 {
1204 SvREFCNT_dec (coro_mortal);
1205 coro_mortal = 0;
1206 }
1207}
1208
1209static int
1210runops_trace (pTHX)
1211{
1212 COP *oldcop = 0;
1213 int oldcxix = -2;
1214
1215 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1216 {
1217 PERL_ASYNC_CHECK ();
1218
1219 if (cctx_current->flags & CC_TRACE_ALL)
1220 {
1221 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1222 {
1223 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1224 SV **bot, **top;
1225 AV *av = newAV (); /* return values */
1226 SV **cb;
1227 dSP;
1228
1229 GV *gv = CvGV (cx->blk_sub.cv);
1230 SV *fullname = sv_2mortal (newSV (0));
1231 if (isGV (gv))
1232 gv_efullname3 (fullname, gv, 0);
1233
1234 bot = PL_stack_base + cx->blk_oldsp + 1;
1235 top = cx->blk_gimme == G_ARRAY ? SP + 1
1236 : cx->blk_gimme == G_SCALAR ? bot + 1
1237 : bot;
1238
1239 av_extend (av, top - bot);
1240 while (bot < top)
1241 av_push (av, SvREFCNT_inc_NN (*bot++));
1242
1243 PL_runops = RUNOPS_DEFAULT;
1244 ENTER;
1245 SAVETMPS;
1246 EXTEND (SP, 3);
1247 PUSHMARK (SP);
1248 PUSHs (&PL_sv_no);
1249 PUSHs (fullname);
1250 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1251 PUTBACK;
1252 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1253 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1254 SPAGAIN;
1255 FREETMPS;
1256 LEAVE;
1257 PL_runops = runops_trace;
1258 }
1259
1260 if (oldcop != PL_curcop)
1261 {
1262 oldcop = PL_curcop;
1263
1264 if (PL_curcop != &PL_compiling)
1265 {
1266 SV **cb;
1267
1268 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1269 {
1270 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1271
1272 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1273 {
1274 dSP;
1275 GV *gv = CvGV (cx->blk_sub.cv);
1276 SV *fullname = sv_2mortal (newSV (0));
1277
1278 if (isGV (gv))
1279 gv_efullname3 (fullname, gv, 0);
1280
1281 PL_runops = RUNOPS_DEFAULT;
1282 ENTER;
1283 SAVETMPS;
1284 EXTEND (SP, 3);
1285 PUSHMARK (SP);
1286 PUSHs (&PL_sv_yes);
1287 PUSHs (fullname);
1288 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1289 PUTBACK;
1290 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1291 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1292 SPAGAIN;
1293 FREETMPS;
1294 LEAVE;
1295 PL_runops = runops_trace;
1296 }
1297
1298 oldcxix = cxstack_ix;
1299 }
1300
1301 if (cctx_current->flags & CC_TRACE_LINE)
1302 {
1303 dSP;
1304
1305 PL_runops = RUNOPS_DEFAULT;
1306 ENTER;
1307 SAVETMPS;
1308 EXTEND (SP, 3);
1309 PL_runops = RUNOPS_DEFAULT;
1310 PUSHMARK (SP);
1311 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1312 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1313 PUTBACK;
1314 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1315 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1316 SPAGAIN;
1317 FREETMPS;
1318 LEAVE;
1319 PL_runops = runops_trace;
1320 }
1321 }
1322 }
1323 }
1324 }
1325
1326 TAINT_NOT;
1327 return 0;
1328}
1329
1330static struct CoroSLF cctx_ssl_frame;
1331
1332static void
1333slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1334{
1335 ta->prev = 0;
1336}
1337
1338static int
1339slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1340{
1341 *frame = cctx_ssl_frame;
1342
1343 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1344}
1345
1346/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1347static void NOINLINE
1348cctx_prepare (pTHX)
1349{
1350 PL_top_env = &PL_start_env;
1351
1352 if (cctx_current->flags & CC_TRACE)
1353 PL_runops = runops_trace;
1354
1355 /* we already must be executing an SLF op, there is no other valid way
1356 * that can lead to creation of a new cctx */
1357 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1358 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1359
1360 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1361 cctx_ssl_frame = slf_frame;
1362
1363 slf_frame.prepare = slf_prepare_set_stacklevel;
1364 slf_frame.check = slf_check_set_stacklevel;
1365}
1366
1367/* the tail of transfer: execute stuff we can only do after a transfer */
1368INLINE void
1369transfer_tail (pTHX)
1370{
1371 free_coro_mortal (aTHX);
1372}
1373
1374/*
1375 * this is a _very_ stripped down perl interpreter ;)
1376 */
1377static void
1378cctx_run (void *arg)
1379{
1380#ifdef USE_ITHREADS
1381# if CORO_PTHREAD
1382 PERL_SET_CONTEXT (coro_thx);
1383# endif
1384#endif
1385 {
1386 dTHX;
1387
1388 /* normally we would need to skip the entersub here */
1389 /* not doing so will re-execute it, which is exactly what we want */
1390 /* PL_nop = PL_nop->op_next */
1391
1392 /* inject a fake subroutine call to cctx_init */
1393 cctx_prepare (aTHX);
1394
1395 /* cctx_run is the alternative tail of transfer() */
1396 transfer_tail (aTHX);
1397
1398 /* somebody or something will hit me for both perl_run and PL_restartop */
1399 PL_restartop = PL_op;
1400 perl_run (PL_curinterp);
1401 /*
1402 * Unfortunately, there is no way to get at the return values of the
1403 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1404 * runtime errors here, as this is just a random interpreter, not a thread.
1405 */
1406
1407 /*
1408 * If perl-run returns we assume exit() was being called or the coro
1409 * fell off the end, which seems to be the only valid (non-bug)
1410 * reason for perl_run to return. We try to exit by jumping to the
1411 * bootstrap-time "top" top_env, as we cannot restore the "main"
1412 * coroutine as Coro has no such concept.
1413 * This actually isn't valid with the pthread backend, but OSes requiring
1414 * that backend are too broken to do it in a standards-compliant way.
1415 */
1416 PL_top_env = main_top_env;
1417 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1418 }
1419}
1420
1421static coro_cctx *
1422cctx_new ()
1423{
1424 coro_cctx *cctx;
1425
1426 ++cctx_count;
1427 New (0, cctx, 1, coro_cctx);
1428
1429 cctx->gen = cctx_gen;
1430 cctx->flags = 0;
1431 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1432
1433 return cctx;
1434}
1435
1436/* create a new cctx only suitable as source */
1437static coro_cctx *
1438cctx_new_empty ()
1439{
1440 coro_cctx *cctx = cctx_new ();
1441
1442 cctx->sptr = 0;
1443 coro_create (&cctx->cctx, 0, 0, 0, 0);
1444
1445 return cctx;
1446}
1447
1448/* create a new cctx suitable as destination/running a perl interpreter */
1449static coro_cctx *
1450cctx_new_run ()
1451{
1452 coro_cctx *cctx = cctx_new ();
1453 void *stack_start;
1454 size_t stack_size;
1455
1456#if HAVE_MMAP
1457 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1458 /* mmap supposedly does allocate-on-write for us */
1459 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1460
1461 if (cctx->sptr != (void *)-1)
1462 {
1463 #if CORO_STACKGUARD
1464 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1465 #endif
1466 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1467 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1468 cctx->flags |= CC_MAPPED;
1469 }
1470 else
1471#endif
1472 {
1473 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1474 New (0, cctx->sptr, cctx_stacksize, long);
1475
1476 if (!cctx->sptr)
1477 {
1478 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1479 _exit (EXIT_FAILURE);
1480 }
1481
1482 stack_start = cctx->sptr;
1483 stack_size = cctx->ssize;
1484 }
1485
1486 #if CORO_USE_VALGRIND
1487 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1488 #endif
1489
1490 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1491
1492 return cctx;
1493}
1494
1495static void
1496cctx_destroy (coro_cctx *cctx)
1497{
1498 if (!cctx)
1499 return;
1500
1501 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));//D temporary?
1502
1503 --cctx_count;
1504 coro_destroy (&cctx->cctx);
1505
1506 /* coro_transfer creates new, empty cctx's */
1507 if (cctx->sptr)
1508 {
1509 #if CORO_USE_VALGRIND
1510 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1511 #endif
1512
1513#if HAVE_MMAP
1514 if (cctx->flags & CC_MAPPED)
1515 munmap (cctx->sptr, cctx->ssize);
1516 else
1517#endif
1518 Safefree (cctx->sptr);
1519 }
1520
1521 Safefree (cctx);
1522}
1523
1524/* wether this cctx should be destructed */
1525#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1526
1527static coro_cctx *
1528cctx_get (pTHX)
1529{
1530 while (expect_true (cctx_first))
1531 {
1532 coro_cctx *cctx = cctx_first;
1533 cctx_first = cctx->next;
1534 --cctx_idle;
1535
1536 if (expect_true (!CCTX_EXPIRED (cctx)))
1537 return cctx;
1538
1539 cctx_destroy (cctx);
1540 }
1541
1542 return cctx_new_run ();
1543}
1544
1545static void
1546cctx_put (coro_cctx *cctx)
1547{
1548 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1549
1550 /* free another cctx if overlimit */
1551 if (expect_false (cctx_idle >= cctx_max_idle))
1552 {
1553 coro_cctx *first = cctx_first;
1554 cctx_first = first->next;
1555 --cctx_idle;
1556
1557 cctx_destroy (first);
1558 }
1559
1560 ++cctx_idle;
1561 cctx->next = cctx_first;
1562 cctx_first = cctx;
1563}
1564
1565/** coroutine switching *****************************************************/
1566
1567static void
1568transfer_check (pTHX_ struct coro *prev, struct coro *next)
1569{
1570 /* TODO: throwing up here is considered harmful */
1571
1572 if (expect_true (prev != next))
1573 {
1574 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1575 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1576
1577 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1578 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1579
1580#if !PERL_VERSION_ATLEAST (5,10,0)
1581 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1582 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1583#endif
1584 }
1585}
1586
1587/* always use the TRANSFER macro */
1588static void NOINLINE /* noinline so we have a fixed stackframe */
1589transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1590{
1591 dSTACKLEVEL;
1592
1593 /* sometimes transfer is only called to set idle_sp */
1594 if (expect_false (!prev))
1595 {
1596 cctx_current->idle_sp = STACKLEVEL;
1597 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1598 }
1599 else if (expect_true (prev != next))
1600 {
1601 coro_cctx *cctx_prev;
1602
1603 if (expect_false (prev->flags & CF_NEW))
1604 {
1605 /* create a new empty/source context */
1606 prev->flags &= ~CF_NEW;
1607 prev->flags |= CF_RUNNING;
1608 }
1609
1610 prev->flags &= ~CF_RUNNING;
1611 next->flags |= CF_RUNNING;
1612
1613 /* first get rid of the old state */
1614 save_perl (aTHX_ prev);
1615
1616 if (expect_false (next->flags & CF_NEW))
1617 {
1618 /* need to start coroutine */
1619 next->flags &= ~CF_NEW;
1620 /* setup coroutine call */
1621 init_perl (aTHX_ next);
1622 }
1623 else
1624 load_perl (aTHX_ next);
1625
1626 /* possibly untie and reuse the cctx */
1627 if (expect_true (
1628 cctx_current->idle_sp == STACKLEVEL
1629 && !(cctx_current->flags & CC_TRACE)
1630 && !force_cctx
1631 ))
1632 {
1633 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1634 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1635
1636 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1637 /* without this the next cctx_get might destroy the running cctx while still in use */
1638 if (expect_false (CCTX_EXPIRED (cctx_current)))
1639 if (expect_true (!next->cctx))
1640 next->cctx = cctx_get (aTHX);
1641
1642 cctx_put (cctx_current);
1643 }
1644 else
1645 prev->cctx = cctx_current;
1646
1647 ++next->usecount;
1648
1649 cctx_prev = cctx_current;
1650 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1651
1652 next->cctx = 0;
1653
1654 if (expect_false (cctx_prev != cctx_current))
1655 {
1656 cctx_prev->top_env = PL_top_env;
1657 PL_top_env = cctx_current->top_env;
1658 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1659 }
1660
1661 transfer_tail (aTHX);
1662 }
1663}
1664
1665#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1666#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1667
1668/** high level stuff ********************************************************/
1669
1670static int
1671coro_state_destroy (pTHX_ struct coro *coro)
1672{
1673 if (coro->flags & CF_DESTROYED)
1674 return 0;
1675
1676 if (coro->on_destroy && !PL_dirty)
1677 coro->on_destroy (aTHX_ coro);
1678
1679 coro->flags |= CF_DESTROYED;
1680
1681 if (coro->flags & CF_READY)
1682 {
1683 /* reduce nready, as destroying a ready coro effectively unreadies it */
1684 /* alternative: look through all ready queues and remove the coro */
1685 --coro_nready;
1686 }
1687 else
1688 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1689
1690 if (coro->mainstack
1691 && coro->mainstack != main_mainstack
1692 && coro->slot
1693 && !PL_dirty)
1694 destroy_perl (aTHX_ coro);
1695
1696 if (coro->next) coro->next->prev = coro->prev;
1697 if (coro->prev) coro->prev->next = coro->next;
1698 if (coro == coro_first) coro_first = coro->next;
1699
1700 cctx_destroy (coro->cctx);
1701 SvREFCNT_dec (coro->startcv);
1702 SvREFCNT_dec (coro->args);
1703 SvREFCNT_dec (coro->swap_sv);
1704 SvREFCNT_dec (CORO_THROW);
1705
1706 return 1;
1707}
1708
1709static int
1710coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1711{
1712 struct coro *coro = (struct coro *)mg->mg_ptr;
1713 mg->mg_ptr = 0;
1714
1715 coro->hv = 0;
1716
1717 if (--coro->refcnt < 0)
1718 {
1719 coro_state_destroy (aTHX_ coro);
1720 Safefree (coro);
1721 }
1722
1723 return 0;
1724}
1725
1726static int
1727coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1728{
1729 struct coro *coro = (struct coro *)mg->mg_ptr;
1730
1731 ++coro->refcnt;
1732
1733 return 0;
1734}
1735
1736static MGVTBL coro_state_vtbl = {
1737 0, 0, 0, 0,
1738 coro_state_free,
1739 0,
1740#ifdef MGf_DUP
1741 coro_state_dup,
1742#else
1743# define MGf_DUP 0
1744#endif
1745};
1746
1747static void
1748prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1749{
1750 ta->prev = SvSTATE (prev_sv);
1751 ta->next = SvSTATE (next_sv);
1752 TRANSFER_CHECK (*ta);
1753}
1754
1755static void
1756api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1757{
1758 struct coro_transfer_args ta;
1759
1760 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1761 TRANSFER (ta, 1);
1762}
1763
1764/** Coro ********************************************************************/
1765
1766INLINE void
1767coro_enq (pTHX_ struct coro *coro)
1768{
1769 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1770
1771 SvREFCNT_inc_NN (coro->hv);
1772
1773 coro->next_ready = 0;
1774 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1775 ready [1] = coro;
1776}
1777
1778INLINE struct coro *
1779coro_deq (pTHX)
1780{
1781 int prio;
1782
1783 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1784 {
1785 struct coro **ready = coro_ready [prio];
1786
1787 if (ready [0])
1788 {
1789 struct coro *coro = ready [0];
1790 ready [0] = coro->next_ready;
1791 return coro;
1792 }
1793 }
1794
1795 return 0;
1796}
1797
1798static void
1799invoke_sv_ready_hook_helper (void)
1800{
1801 dTHX;
596 dSP; 1802 dSP;
597 Coro__State ctx = (Coro__State)arg;
598 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599 1803
600 coro_init_stacks (aTHX); 1804 ENTER;
601 /*PL_curcop = 0;*/ 1805 SAVETMPS;
602 /*PL_in_eval = PL_in_eval;*/ /* inherit */
603 SvREFCNT_dec (GvAV (PL_defgv));
604 GvAV (PL_defgv) = ctx->args;
605 1806
606 SPAGAIN;
607
608 if (ctx->stack)
609 {
610 ctx->cursp = 0;
611
612 PUSHMARK(SP); 1807 PUSHMARK (SP);
613 PUTBACK; 1808 PUTBACK;
614 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1809 call_sv (coro_readyhook, G_VOID | G_DISCARD);
615 1810
616 if (SvTRUE (ERRSV)) 1811 FREETMPS;
617 croak (NULL); 1812 LEAVE;
618 else 1813}
619 croak ("FATAL: CCTXT coroutine returned!"); 1814
1815static int
1816api_ready (pTHX_ SV *coro_sv)
1817{
1818 struct coro *coro = SvSTATE (coro_sv);
1819
1820 if (coro->flags & CF_READY)
1821 return 0;
1822
1823 coro->flags |= CF_READY;
1824
1825 coro_enq (aTHX_ coro);
1826
1827 if (!coro_nready++)
1828 if (coroapi.readyhook)
1829 coroapi.readyhook ();
1830
1831 return 1;
1832}
1833
1834static int
1835api_is_ready (pTHX_ SV *coro_sv)
1836{
1837 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1838}
1839
1840/* expects to own a reference to next->hv */
1841INLINE void
1842prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1843{
1844 SV *prev_sv = SvRV (coro_current);
1845
1846 ta->prev = SvSTATE_hv (prev_sv);
1847 ta->next = next;
1848
1849 TRANSFER_CHECK (*ta);
1850
1851 SvRV_set (coro_current, (SV *)next->hv);
1852
1853 free_coro_mortal (aTHX);
1854 coro_mortal = prev_sv;
1855}
1856
1857static void
1858prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1859{
1860 for (;;)
620 } 1861 {
621 else 1862 struct coro *next = coro_deq (aTHX);
622 {
623 UNOP myop;
624 1863
625 PL_op = (OP *)&myop; 1864 if (expect_true (next))
626
627 Zero(&myop, 1, UNOP);
628 myop.op_next = Nullop;
629 myop.op_flags = OPf_WANT_VOID;
630
631 PUSHMARK(SP);
632 XPUSHs (sub_init);
633 /*
634 * the next line is slightly wrong, as PL_op->op_next
635 * is actually being executed so we skip the first op.
636 * that doesn't matter, though, since it is only
637 * pp_nextstate and we never return...
638 * ah yes, and I don't care anyways ;)
639 */
640 PUTBACK;
641 PL_op = pp_entersub();
642 SPAGAIN;
643
644 ENTER; /* necessary e.g. for dounwind */
645 }
646}
647
648static void
649continue_coro (void *arg)
650{
651 /*
652 * this is a _very_ stripped down perl interpreter ;)
653 */
654 Coro__State ctx = (Coro__State)arg;
655 JMPENV coro_start_env;
656
657 /* same as JMPENV_BOOTSTRAP */
658 Zero(&coro_start_env, 1, JMPENV);
659 coro_start_env.je_ret = -1;
660 coro_start_env.je_mustcatch = TRUE;
661 PL_top_env = &coro_start_env;
662
663 ctx->cursp = 0;
664 PL_op = PL_op->op_next;
665 CALLRUNOPS(aTHX);
666
667 abort ();
668}
669
670STATIC void
671transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
672{
673 dSTACKLEVEL;
674 static struct coro *xnext;
675
676 if (prev != next)
677 {
678 xnext = next;
679
680 if (next->mainstack)
681 { 1865 {
682 SAVE (prev, flags); 1866 /* cannot transfer to destroyed coros, skip and look for next */
683 LOAD (next); 1867 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
684 1868 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
685 /* mark this state as in-use */ 1869 else
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 { 1870 {
692 if (!prev->stack) 1871 next->flags &= ~CF_READY;
693 allocate_stack (prev, 0); 1872 --coro_nready;
694 else if (prev->cursp != stacklevel 1873
695 && prev->stack->usecnt > 1) 1874 prepare_schedule_to (aTHX_ ta, next);
696 { 1875 break;
697 prev->gencnt = ++prev->stack->gencnt;
698 prev->stack->usecnt = 1;
699 }
700
701 /* has our stack been invalidated? */
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 {
704 deallocate_stack (next);
705 allocate_stack (next, 1);
706 coro_create (&(next->stack->cctx),
707 continue_coro, (void *)next,
708 next->stack->sptr, labs (next->stack->ssize));
709 }
710
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712 /* don't add any code here */
713 } 1876 }
714
715 } 1877 }
716 else if (next->tmps_ix == -2)
717 croak ("tried to transfer to running coroutine");
718 else 1878 else
719 { 1879 {
720 SAVE (prev, -1); /* first get rid of the old state */ 1880 /* nothing to schedule: call the idle handler */
721 1881 if (SvROK (sv_idle)
722 if (flags & TRANSFER_SAVE_CCTXT) 1882 && SvOBJECT (SvRV (sv_idle)))
723 { 1883 {
724 if (!prev->stack) 1884 if (SvRV (sv_idle) == SvRV (coro_current))
725 allocate_stack (prev, 0); 1885 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
726 1886
727 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1887 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
728 { 1888 api_ready (aTHX_ SvRV (sv_idle));
729 setup_coro (next); 1889 --coro_nready;
730
731 prev->stack->refcnt++;
732 prev->stack->usecnt++;
733 next->stack = prev->stack;
734 next->gencnt = prev->gencnt;
735 }
736 else
737 {
738 allocate_stack (next, 1);
739 coro_create (&(next->stack->cctx),
740 setup_coro, (void *)next,
741 next->stack->sptr, labs (next->stack->ssize));
742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743 /* don't add any code here */
744 }
745 } 1890 }
746 else 1891 else
747 setup_coro (next); 1892 {
1893 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1894 dSP;
1895
1896 ENTER;
1897 SAVETMPS;
1898
1899 PUSHMARK (SP);
1900 PUTBACK;
1901 call_sv (sv_idle, G_VOID | G_DISCARD);
1902
1903 FREETMPS;
1904 LEAVE;
1905 }
748 } 1906 }
749
750 /*
751 * xnext is now either prev or next, depending on wether
752 * we switched the c stack or not. that's why i use a global
753 * variable, that should become thread-specific at one point.
754 */
755 xnext->cursp = stacklevel;
756 }
757}
758
759static struct coro *
760sv_to_coro (SV *arg, const char *funcname, const char *varname)
761{
762 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
763 { 1907 }
764 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 1908}
765 1909
766 if (!he) 1910INLINE void
767 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); 1911prepare_cede (pTHX_ struct coro_transfer_args *ta)
1912{
1913 api_ready (aTHX_ coro_current);
1914 prepare_schedule (aTHX_ ta);
1915}
768 1916
769 arg = HeVAL(he); 1917INLINE void
1918prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1919{
1920 SV *prev = SvRV (coro_current);
1921
1922 if (coro_nready)
770 } 1923 {
1924 prepare_schedule (aTHX_ ta);
1925 api_ready (aTHX_ prev);
771 1926 }
772 /* must also be changed inside Coro::Cont::yield */ 1927 else
773 if (SvROK(arg) && SvOBJECT(SvRV(arg)) 1928 prepare_nop (aTHX_ ta);
774 && SvSTASH(SvRV(arg)) == coro_state_stash)
775 return (struct coro *) SvIV((SV*)SvRV(arg));
776
777 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
778 /*NORETURN*/
779} 1929}
780 1930
1931static void
1932api_schedule (pTHX)
1933{
1934 struct coro_transfer_args ta;
1935
1936 prepare_schedule (aTHX_ &ta);
1937 TRANSFER (ta, 1);
1938}
1939
1940static void
1941api_schedule_to (pTHX_ SV *coro_sv)
1942{
1943 struct coro_transfer_args ta;
1944 struct coro *next = SvSTATE (coro_sv);
1945
1946 SvREFCNT_inc_NN (coro_sv);
1947 prepare_schedule_to (aTHX_ &ta, next);
1948}
1949
781static void 1950static int
782api_transfer(pTHX_ SV *prev, SV *next, int flags) 1951api_cede (pTHX)
783{ 1952{
784 transfer(aTHX_ 1953 struct coro_transfer_args ta;
785 sv_to_coro (prev, "Coro::transfer", "prev"),
786 sv_to_coro (next, "Coro::transfer", "next"),
787 flags);
788}
789 1954
790/** Coro ********************************************************************/ 1955 prepare_cede (aTHX_ &ta);
791 1956
792#define PRIO_MAX 3 1957 if (expect_true (ta.prev != ta.next))
793#define PRIO_HIGH 1 1958 {
794#define PRIO_NORMAL 0 1959 TRANSFER (ta, 1);
795#define PRIO_LOW -1 1960 return 1;
796#define PRIO_IDLE -3
797#define PRIO_MIN -4
798
799/* for Coro.pm */
800static GV *coro_current, *coro_idle;
801static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
802static int coro_nready;
803
804static void
805coro_enq (SV *sv)
806{
807 if (SvROK (sv))
808 { 1961 }
809 SV *hv = SvRV (sv); 1962 else
810 if (SvTYPE (hv) == SVt_PVHV) 1963 return 0;
1964}
1965
1966static int
1967api_cede_notself (pTHX)
1968{
1969 if (coro_nready)
1970 {
1971 struct coro_transfer_args ta;
1972
1973 prepare_cede_notself (aTHX_ &ta);
1974 TRANSFER (ta, 1);
1975 return 1;
1976 }
1977 else
1978 return 0;
1979}
1980
1981static void
1982api_trace (pTHX_ SV *coro_sv, int flags)
1983{
1984 struct coro *coro = SvSTATE (coro_sv);
1985
1986 if (coro->flags & CF_RUNNING)
1987 croak ("cannot enable tracing on a running coroutine, caught");
1988
1989 if (flags & CC_TRACE)
1990 {
1991 if (!coro->cctx)
1992 coro->cctx = cctx_new_run ();
1993 else if (!(coro->cctx->flags & CC_TRACE))
1994 croak ("cannot enable tracing on coroutine with custom stack, caught");
1995
1996 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1997 }
1998 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1999 {
2000 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2001
2002 if (coro->flags & CF_RUNNING)
2003 PL_runops = RUNOPS_DEFAULT;
2004 else
2005 coro->slot->runops = RUNOPS_DEFAULT;
2006 }
2007}
2008
2009static void
2010coro_call_on_destroy (pTHX_ struct coro *coro)
2011{
2012 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2013 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2014
2015 if (on_destroyp)
2016 {
2017 AV *on_destroy = (AV *)SvRV (*on_destroyp);
2018
2019 while (AvFILLp (on_destroy) >= 0)
811 { 2020 {
812 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 2021 dSP; /* don't disturb outer sp */
813 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2022 SV *cb = av_pop (on_destroy);
814 2023
815 prio = prio > PRIO_MAX ? PRIO_MAX 2024 PUSHMARK (SP);
816 : prio < PRIO_MIN ? PRIO_MIN 2025
2026 if (statusp)
2027 {
817 : prio; 2028 int i;
2029 AV *status = (AV *)SvRV (*statusp);
2030 EXTEND (SP, AvFILLp (status) + 1);
818 2031
819 av_push (coro_ready [prio - PRIO_MIN], sv); 2032 for (i = 0; i <= AvFILLp (status); ++i)
820 coro_nready++; 2033 PUSHs (AvARRAY (status)[i]);
2034 }
821 2035
822 return; 2036 PUTBACK;
2037 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
823 } 2038 }
824 } 2039 }
2040}
825 2041
826 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2042static void
2043slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2044{
2045 int i;
2046 HV *hv = (HV *)SvRV (coro_current);
2047 AV *av = newAV ();
2048
2049 /* items are actually not so common, so optimise for this case */
2050 if (items)
2051 {
2052 av_extend (av, items - 1);
2053
2054 for (i = 0; i < items; ++i)
2055 av_push (av, SvREFCNT_inc_NN (arg [i]));
2056 }
2057
2058 hv_store (hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2059
2060 av_push (av_destroy, (SV *)newRV_inc ((SV *)hv)); /* RVinc for perl */
2061 api_ready (aTHX_ sv_manager);
2062
2063 frame->prepare = prepare_schedule;
2064 frame->check = slf_check_repeat;
2065
2066 /* as a minor optimisation, we could unwind all stacks here */
2067 /* but that puts extra pressure on pp_slf, and is not worth much */
2068 /*coro_unwind_stacks (aTHX);*/
2069}
2070
2071/*****************************************************************************/
2072/* async pool handler */
2073
2074static int
2075slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2076{
2077 HV *hv = (HV *)SvRV (coro_current);
2078 struct coro *coro = (struct coro *)frame->data;
2079
2080 if (!coro->invoke_cb)
2081 return 1; /* loop till we have invoke */
2082 else
2083 {
2084 hv_store (hv, "desc", sizeof ("desc") - 1,
2085 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2086
2087 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2088
2089 {
2090 dSP;
2091 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2092 PUTBACK;
2093 }
2094
2095 SvREFCNT_dec (GvAV (PL_defgv));
2096 GvAV (PL_defgv) = coro->invoke_av;
2097 coro->invoke_av = 0;
2098
2099 return 0;
2100 }
2101}
2102
2103static void
2104slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2105{
2106 HV *hv = (HV *)SvRV (coro_current);
2107 struct coro *coro = SvSTATE_hv ((SV *)hv);
2108
2109 if (expect_true (coro->saved_deffh))
2110 {
2111 /* subsequent iteration */
2112 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2113 coro->saved_deffh = 0;
2114
2115 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2116 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2117 {
2118 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2119 coro->invoke_av = newAV ();
2120
2121 frame->prepare = prepare_nop;
2122 }
2123 else
2124 {
2125 av_clear (GvAV (PL_defgv));
2126 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2127
2128 coro->prio = 0;
2129
2130 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2131 api_trace (aTHX_ coro_current, 0);
2132
2133 frame->prepare = prepare_schedule;
2134 av_push (av_async_pool, SvREFCNT_inc (hv));
2135 }
2136 }
2137 else
2138 {
2139 /* first iteration, simply fall through */
2140 frame->prepare = prepare_nop;
2141 }
2142
2143 frame->check = slf_check_pool_handler;
2144 frame->data = (void *)coro;
2145}
2146
2147/*****************************************************************************/
2148/* rouse callback */
2149
2150#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2151
2152static void
2153coro_rouse_callback (pTHX_ CV *cv)
2154{
2155 dXSARGS;
2156 SV *data = (SV *)S_GENSUB_ARG;
2157
2158 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2159 {
2160 /* first call, set args */
2161 SV *coro = SvRV (data);
2162 AV *av = newAV ();
2163
2164 SvRV_set (data, (SV *)av);
2165
2166 /* better take a full copy of the arguments */
2167 while (items--)
2168 av_store (av, items, newSVsv (ST (items)));
2169
2170 api_ready (aTHX_ coro);
2171 SvREFCNT_dec (coro);
2172 }
2173
2174 XSRETURN_EMPTY;
2175}
2176
2177static int
2178slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2179{
2180 SV *data = (SV *)frame->data;
2181
2182 if (CORO_THROW)
2183 return 0;
2184
2185 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2186 return 1;
2187
2188 /* now push all results on the stack */
2189 {
2190 dSP;
2191 AV *av = (AV *)SvRV (data);
2192 int i;
2193
2194 EXTEND (SP, AvFILLp (av) + 1);
2195 for (i = 0; i <= AvFILLp (av); ++i)
2196 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2197
2198 /* we have stolen the elements, so set length to zero and free */
2199 AvFILLp (av) = -1;
2200 av_undef (av);
2201
2202 PUTBACK;
2203 }
2204
2205 return 0;
2206}
2207
2208static void
2209slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2210{
2211 SV *cb;
2212
2213 if (items)
2214 cb = arg [0];
2215 else
2216 {
2217 struct coro *coro = SvSTATE_current;
2218
2219 if (!coro->rouse_cb)
2220 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2221
2222 cb = sv_2mortal (coro->rouse_cb);
2223 coro->rouse_cb = 0;
2224 }
2225
2226 if (!SvROK (cb)
2227 || SvTYPE (SvRV (cb)) != SVt_PVCV
2228 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2229 croak ("Coro::rouse_wait called with illegal callback argument,");
2230
2231 {
2232 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2233 SV *data = (SV *)S_GENSUB_ARG;
2234
2235 frame->data = (void *)data;
2236 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2237 frame->check = slf_check_rouse_wait;
2238 }
827} 2239}
828 2240
829static SV * 2241static SV *
830coro_deq (int min_prio) 2242coro_new_rouse_cb (pTHX)
831{ 2243{
832 int prio = PRIO_MAX - PRIO_MIN; 2244 HV *hv = (HV *)SvRV (coro_current);
2245 struct coro *coro = SvSTATE_hv (hv);
2246 SV *data = newRV_inc ((SV *)hv);
2247 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
833 2248
834 min_prio -= PRIO_MIN; 2249 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
835 if (min_prio < 0) 2250 SvREFCNT_dec (data); /* magicext increases the refcount */
836 min_prio = 0;
837 2251
838 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2252 SvREFCNT_dec (coro->rouse_cb);
839 if (av_len (coro_ready[prio]) >= 0) 2253 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2254
2255 return cb;
2256}
2257
2258/*****************************************************************************/
2259/* schedule-like-function opcode (SLF) */
2260
2261static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2262static const CV *slf_cv;
2263static SV **slf_argv;
2264static int slf_argc, slf_arga; /* count, allocated */
2265static I32 slf_ax; /* top of stack, for restore */
2266
2267/* this restores the stack in the case we patched the entersub, to */
2268/* recreate the stack frame as perl will on following calls */
2269/* since entersub cleared the stack */
2270static OP *
2271pp_restore (pTHX)
2272{
2273 int i;
2274 SV **SP = PL_stack_base + slf_ax;
2275
2276 PUSHMARK (SP);
2277
2278 EXTEND (SP, slf_argc + 1);
2279
2280 for (i = 0; i < slf_argc; ++i)
2281 PUSHs (sv_2mortal (slf_argv [i]));
2282
2283 PUSHs ((SV *)CvGV (slf_cv));
2284
2285 RETURNOP (slf_restore.op_first);
2286}
2287
2288static void
2289slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2290{
2291 SV **arg = (SV **)slf_frame.data;
2292
2293 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2294}
2295
2296static void
2297slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2298{
2299 if (items != 2)
2300 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2301
2302 frame->prepare = slf_prepare_transfer;
2303 frame->check = slf_check_nop;
2304 frame->data = (void *)arg; /* let's hope it will stay valid */
2305}
2306
2307static void
2308slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2309{
2310 frame->prepare = prepare_schedule;
2311 frame->check = slf_check_nop;
2312}
2313
2314static void
2315slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2316{
2317 struct coro *next = (struct coro *)slf_frame.data;
2318
2319 SvREFCNT_inc_NN (next->hv);
2320 prepare_schedule_to (aTHX_ ta, next);
2321}
2322
2323static void
2324slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2325{
2326 if (!items)
2327 croak ("Coro::schedule_to expects a coroutine argument, caught");
2328
2329 frame->data = (void *)SvSTATE (arg [0]);
2330 frame->prepare = slf_prepare_schedule_to;
2331 frame->check = slf_check_nop;
2332}
2333
2334static void
2335slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2336{
2337 api_ready (aTHX_ SvRV (coro_current));
2338
2339 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2340}
2341
2342static void
2343slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2344{
2345 frame->prepare = prepare_cede;
2346 frame->check = slf_check_nop;
2347}
2348
2349static void
2350slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2351{
2352 frame->prepare = prepare_cede_notself;
2353 frame->check = slf_check_nop;
2354}
2355
2356/*
2357 * these not obviously related functions are all rolled into one
2358 * function to increase chances that they all will call transfer with the same
2359 * stack offset
2360 * SLF stands for "schedule-like-function".
2361 */
2362static OP *
2363pp_slf (pTHX)
2364{
2365 I32 checkmark; /* mark SP to see how many elements check has pushed */
2366
2367 /* set up the slf frame, unless it has already been set-up */
2368 /* the latter happens when a new coro has been started */
2369 /* or when a new cctx was attached to an existing coroutine */
2370 if (expect_true (!slf_frame.prepare))
2371 {
2372 /* first iteration */
2373 dSP;
2374 SV **arg = PL_stack_base + TOPMARK + 1;
2375 int items = SP - arg; /* args without function object */
2376 SV *gv = *sp;
2377
2378 /* do a quick consistency check on the "function" object, and if it isn't */
2379 /* for us, divert to the real entersub */
2380 if (SvTYPE (gv) != SVt_PVGV
2381 || !GvCV (gv)
2382 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2383 return PL_ppaddr[OP_ENTERSUB](aTHX);
2384
2385 if (!(PL_op->op_flags & OPf_STACKED))
840 { 2386 {
841 coro_nready--; 2387 /* ampersand-form of call, use @_ instead of stack */
842 return av_shift (coro_ready[prio]); 2388 AV *av = GvAV (PL_defgv);
2389 arg = AvARRAY (av);
2390 items = AvFILLp (av) + 1;
843 } 2391 }
2392
2393 /* now call the init function, which needs to set up slf_frame */
2394 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2395 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2396
2397 /* pop args */
2398 SP = PL_stack_base + POPMARK;
2399
2400 PUTBACK;
2401 }
2402
2403 /* now that we have a slf_frame, interpret it! */
2404 /* we use a callback system not to make the code needlessly */
2405 /* complicated, but so we can run multiple perl coros from one cctx */
2406
2407 do
2408 {
2409 struct coro_transfer_args ta;
2410
2411 slf_frame.prepare (aTHX_ &ta);
2412 TRANSFER (ta, 0);
2413
2414 checkmark = PL_stack_sp - PL_stack_base;
2415 }
2416 while (slf_frame.check (aTHX_ &slf_frame));
2417
2418 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2419
2420 /* exception handling */
2421 if (expect_false (CORO_THROW))
2422 {
2423 SV *exception = sv_2mortal (CORO_THROW);
2424
2425 CORO_THROW = 0;
2426 sv_setsv (ERRSV, exception);
2427 croak (0);
2428 }
2429
2430 /* return value handling - mostly like entersub */
2431 /* make sure we put something on the stack in scalar context */
2432 if (GIMME_V == G_SCALAR)
2433 {
2434 dSP;
2435 SV **bot = PL_stack_base + checkmark;
2436
2437 if (sp == bot) /* too few, push undef */
2438 bot [1] = &PL_sv_undef;
2439 else if (sp != bot + 1) /* too many, take last one */
2440 bot [1] = *sp;
2441
2442 SP = bot + 1;
2443
2444 PUTBACK;
2445 }
2446
2447 return NORMAL;
2448}
2449
2450static void
2451api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2452{
2453 int i;
2454 SV **arg = PL_stack_base + ax;
2455 int items = PL_stack_sp - arg + 1;
2456
2457 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2458
2459 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2460 && PL_op->op_ppaddr != pp_slf)
2461 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2462
2463 CvFLAGS (cv) |= CVf_SLF;
2464 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2465 slf_cv = cv;
2466
2467 /* we patch the op, and then re-run the whole call */
2468 /* we have to put the same argument on the stack for this to work */
2469 /* and this will be done by pp_restore */
2470 slf_restore.op_next = (OP *)&slf_restore;
2471 slf_restore.op_type = OP_CUSTOM;
2472 slf_restore.op_ppaddr = pp_restore;
2473 slf_restore.op_first = PL_op;
2474
2475 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2476
2477 if (PL_op->op_flags & OPf_STACKED)
2478 {
2479 if (items > slf_arga)
2480 {
2481 slf_arga = items;
2482 Safefree (slf_argv);
2483 New (0, slf_argv, slf_arga, SV *);
2484 }
2485
2486 slf_argc = items;
2487
2488 for (i = 0; i < items; ++i)
2489 slf_argv [i] = SvREFCNT_inc (arg [i]);
2490 }
2491 else
2492 slf_argc = 0;
2493
2494 PL_op->op_ppaddr = pp_slf;
2495 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2496
2497 PL_op = (OP *)&slf_restore;
2498}
2499
2500/*****************************************************************************/
2501/* dynamic wind */
2502
2503static void
2504on_enterleave_call (pTHX_ SV *cb)
2505{
2506 dSP;
2507
2508 PUSHSTACK;
2509
2510 PUSHMARK (SP);
2511 PUTBACK;
2512 call_sv (cb, G_VOID | G_DISCARD);
2513 SPAGAIN;
2514
2515 POPSTACK;
2516}
2517
2518static SV *
2519coro_avp_pop_and_free (pTHX_ AV **avp)
2520{
2521 AV *av = *avp;
2522 SV *res = av_pop (av);
2523
2524 if (AvFILLp (av) < 0)
2525 {
2526 *avp = 0;
2527 SvREFCNT_dec (av);
2528 }
2529
2530 return res;
2531}
2532
2533static void
2534coro_pop_on_enter (pTHX_ void *coro)
2535{
2536 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2537 SvREFCNT_dec (cb);
2538}
2539
2540static void
2541coro_pop_on_leave (pTHX_ void *coro)
2542{
2543 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2544 on_enterleave_call (aTHX_ sv_2mortal (cb));
2545}
2546
2547/*****************************************************************************/
2548/* PerlIO::cede */
2549
2550typedef struct
2551{
2552 PerlIOBuf base;
2553 NV next, every;
2554} PerlIOCede;
2555
2556static IV
2557PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2558{
2559 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2560
2561 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2562 self->next = nvtime () + self->every;
2563
2564 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2565}
2566
2567static SV *
2568PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2569{
2570 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2571
2572 return newSVnv (self->every);
2573}
2574
2575static IV
2576PerlIOCede_flush (pTHX_ PerlIO *f)
2577{
2578 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2579 double now = nvtime ();
2580
2581 if (now >= self->next)
2582 {
2583 api_cede (aTHX);
2584 self->next = now + self->every;
2585 }
2586
2587 return PerlIOBuf_flush (aTHX_ f);
2588}
2589
2590static PerlIO_funcs PerlIO_cede =
2591{
2592 sizeof(PerlIO_funcs),
2593 "cede",
2594 sizeof(PerlIOCede),
2595 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2596 PerlIOCede_pushed,
2597 PerlIOBuf_popped,
2598 PerlIOBuf_open,
2599 PerlIOBase_binmode,
2600 PerlIOCede_getarg,
2601 PerlIOBase_fileno,
2602 PerlIOBuf_dup,
2603 PerlIOBuf_read,
2604 PerlIOBuf_unread,
2605 PerlIOBuf_write,
2606 PerlIOBuf_seek,
2607 PerlIOBuf_tell,
2608 PerlIOBuf_close,
2609 PerlIOCede_flush,
2610 PerlIOBuf_fill,
2611 PerlIOBase_eof,
2612 PerlIOBase_error,
2613 PerlIOBase_clearerr,
2614 PerlIOBase_setlinebuf,
2615 PerlIOBuf_get_base,
2616 PerlIOBuf_bufsiz,
2617 PerlIOBuf_get_ptr,
2618 PerlIOBuf_get_cnt,
2619 PerlIOBuf_set_ptrcnt,
2620};
2621
2622/*****************************************************************************/
2623/* Coro::Semaphore & Coro::Signal */
2624
2625static SV *
2626coro_waitarray_new (pTHX_ int count)
2627{
2628 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2629 AV *av = newAV ();
2630 SV **ary;
2631
2632 /* unfortunately, building manually saves memory */
2633 Newx (ary, 2, SV *);
2634 AvALLOC (av) = ary;
2635#if PERL_VERSION_ATLEAST (5,10,0)
2636 AvARRAY (av) = ary;
2637#else
2638 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2639 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2640 SvPVX ((SV *)av) = (char *)ary;
2641#endif
2642 AvMAX (av) = 1;
2643 AvFILLp (av) = 0;
2644 ary [0] = newSViv (count);
2645
2646 return newRV_noinc ((SV *)av);
2647}
2648
2649/* semaphore */
2650
2651static void
2652coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2653{
2654 SV *count_sv = AvARRAY (av)[0];
2655 IV count = SvIVX (count_sv);
2656
2657 count += adjust;
2658 SvIVX (count_sv) = count;
2659
2660 /* now wake up as many waiters as are expected to lock */
2661 while (count > 0 && AvFILLp (av) > 0)
2662 {
2663 SV *cb;
2664
2665 /* swap first two elements so we can shift a waiter */
2666 AvARRAY (av)[0] = AvARRAY (av)[1];
2667 AvARRAY (av)[1] = count_sv;
2668 cb = av_shift (av);
2669
2670 if (SvOBJECT (cb))
2671 {
2672 api_ready (aTHX_ cb);
2673 --count;
2674 }
2675 else if (SvTYPE (cb) == SVt_PVCV)
2676 {
2677 dSP;
2678 PUSHMARK (SP);
2679 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2680 PUTBACK;
2681 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2682 }
2683
2684 SvREFCNT_dec (cb);
2685 }
2686}
2687
2688static void
2689coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2690{
2691 /* call $sem->adjust (0) to possibly wake up some other waiters */
2692 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2693}
2694
2695static int
2696slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2697{
2698 AV *av = (AV *)frame->data;
2699 SV *count_sv = AvARRAY (av)[0];
2700
2701 /* if we are about to throw, don't actually acquire the lock, just throw */
2702 if (CORO_THROW)
2703 return 0;
2704 else if (SvIVX (count_sv) > 0)
2705 {
2706 SvSTATE_current->on_destroy = 0;
2707
2708 if (acquire)
2709 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2710 else
2711 coro_semaphore_adjust (aTHX_ av, 0);
2712
2713 return 0;
2714 }
2715 else
2716 {
2717 int i;
2718 /* if we were woken up but can't down, we look through the whole */
2719 /* waiters list and only add us if we aren't in there already */
2720 /* this avoids some degenerate memory usage cases */
2721
2722 for (i = 1; i <= AvFILLp (av); ++i)
2723 if (AvARRAY (av)[i] == SvRV (coro_current))
2724 return 1;
2725
2726 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2727 return 1;
2728 }
2729}
2730
2731static int
2732slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2733{
2734 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2735}
2736
2737static int
2738slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2739{
2740 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2741}
2742
2743static void
2744slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2745{
2746 AV *av = (AV *)SvRV (arg [0]);
2747
2748 if (SvIVX (AvARRAY (av)[0]) > 0)
2749 {
2750 frame->data = (void *)av;
2751 frame->prepare = prepare_nop;
2752 }
2753 else
2754 {
2755 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2756
2757 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2758 frame->prepare = prepare_schedule;
2759
2760 /* to avoid race conditions when a woken-up coro gets terminated */
2761 /* we arrange for a temporary on_destroy that calls adjust (0) */
2762 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2763 }
2764}
2765
2766static void
2767slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2768{
2769 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2770 frame->check = slf_check_semaphore_down;
2771}
2772
2773static void
2774slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2775{
2776 if (items >= 2)
2777 {
2778 /* callback form */
2779 AV *av = (AV *)SvRV (arg [0]);
2780 SV *cb_cv = s_get_cv_croak (arg [1]);
2781
2782 av_push (av, SvREFCNT_inc_NN (cb_cv));
2783
2784 if (SvIVX (AvARRAY (av)[0]) > 0)
2785 coro_semaphore_adjust (aTHX_ av, 0);
2786
2787 frame->prepare = prepare_nop;
2788 frame->check = slf_check_nop;
2789 }
2790 else
2791 {
2792 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2793 frame->check = slf_check_semaphore_wait;
2794 }
2795}
2796
2797/* signal */
2798
2799static void
2800coro_signal_wake (pTHX_ AV *av, int count)
2801{
2802 SvIVX (AvARRAY (av)[0]) = 0;
2803
2804 /* now signal count waiters */
2805 while (count > 0 && AvFILLp (av) > 0)
2806 {
2807 SV *cb;
2808
2809 /* swap first two elements so we can shift a waiter */
2810 cb = AvARRAY (av)[0];
2811 AvARRAY (av)[0] = AvARRAY (av)[1];
2812 AvARRAY (av)[1] = cb;
2813
2814 cb = av_shift (av);
2815
2816 if (SvTYPE (cb) == SVt_PVCV)
2817 {
2818 dSP;
2819 PUSHMARK (SP);
2820 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2821 PUTBACK;
2822 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2823 }
2824 else
2825 {
2826 api_ready (aTHX_ cb);
2827 sv_setiv (cb, 0); /* signal waiter */
2828 }
2829
2830 SvREFCNT_dec (cb);
2831
2832 --count;
2833 }
2834}
2835
2836static int
2837slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2838{
2839 /* if we are about to throw, also stop waiting */
2840 return SvROK ((SV *)frame->data) && !CORO_THROW;
2841}
2842
2843static void
2844slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2845{
2846 AV *av = (AV *)SvRV (arg [0]);
2847
2848 if (items >= 2)
2849 {
2850 SV *cb_cv = s_get_cv_croak (arg [1]);
2851 av_push (av, SvREFCNT_inc_NN (cb_cv));
2852
2853 if (SvIVX (AvARRAY (av)[0]))
2854 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2855
2856 frame->prepare = prepare_nop;
2857 frame->check = slf_check_nop;
2858 }
2859 else if (SvIVX (AvARRAY (av)[0]))
2860 {
2861 SvIVX (AvARRAY (av)[0]) = 0;
2862 frame->prepare = prepare_nop;
2863 frame->check = slf_check_nop;
2864 }
2865 else
2866 {
2867 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2868
2869 av_push (av, waiter);
2870
2871 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2872 frame->prepare = prepare_schedule;
2873 frame->check = slf_check_signal_wait;
2874 }
2875}
2876
2877/*****************************************************************************/
2878/* Coro::AIO */
2879
2880#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2881
2882/* helper storage struct */
2883struct io_state
2884{
2885 int errorno;
2886 I32 laststype; /* U16 in 5.10.0 */
2887 int laststatval;
2888 Stat_t statcache;
2889};
2890
2891static void
2892coro_aio_callback (pTHX_ CV *cv)
2893{
2894 dXSARGS;
2895 AV *state = (AV *)S_GENSUB_ARG;
2896 SV *coro = av_pop (state);
2897 SV *data_sv = newSV (sizeof (struct io_state));
2898
2899 av_extend (state, items - 1);
2900
2901 sv_upgrade (data_sv, SVt_PV);
2902 SvCUR_set (data_sv, sizeof (struct io_state));
2903 SvPOK_only (data_sv);
2904
2905 {
2906 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2907
2908 data->errorno = errno;
2909 data->laststype = PL_laststype;
2910 data->laststatval = PL_laststatval;
2911 data->statcache = PL_statcache;
2912 }
2913
2914 /* now build the result vector out of all the parameters and the data_sv */
2915 {
2916 int i;
2917
2918 for (i = 0; i < items; ++i)
2919 av_push (state, SvREFCNT_inc_NN (ST (i)));
2920 }
2921
2922 av_push (state, data_sv);
2923
2924 api_ready (aTHX_ coro);
2925 SvREFCNT_dec (coro);
2926 SvREFCNT_dec ((AV *)state);
2927}
2928
2929static int
2930slf_check_aio_req (pTHX_ struct CoroSLF *frame)
2931{
2932 AV *state = (AV *)frame->data;
2933
2934 /* if we are about to throw, return early */
2935 /* this does not cancel the aio request, but at least */
2936 /* it quickly returns */
2937 if (CORO_THROW)
2938 return 0;
2939
2940 /* one element that is an RV? repeat! */
2941 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
2942 return 1;
2943
2944 /* restore status */
2945 {
2946 SV *data_sv = av_pop (state);
2947 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2948
2949 errno = data->errorno;
2950 PL_laststype = data->laststype;
2951 PL_laststatval = data->laststatval;
2952 PL_statcache = data->statcache;
2953
2954 SvREFCNT_dec (data_sv);
2955 }
2956
2957 /* push result values */
2958 {
2959 dSP;
2960 int i;
2961
2962 EXTEND (SP, AvFILLp (state) + 1);
2963 for (i = 0; i <= AvFILLp (state); ++i)
2964 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
2965
2966 PUTBACK;
2967 }
844 2968
845 return 0; 2969 return 0;
846} 2970}
847 2971
848static void 2972static void
849api_ready (SV *coro) 2973slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
850{ 2974{
851 coro_enq (SvREFCNT_inc (coro)); 2975 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
852} 2976 SV *coro_hv = SvRV (coro_current);
2977 struct coro *coro = SvSTATE_hv (coro_hv);
853 2978
854static void 2979 /* put our coroutine id on the state arg */
855api_schedule (int cede) 2980 av_push (state, SvREFCNT_inc_NN (coro_hv));
856{
857 SV *prev, *next;
858 2981
859 prev = GvSV (coro_current); 2982 /* first see whether we have a non-zero priority and set it as AIO prio */
2983 if (coro->prio)
2984 {
2985 dSP;
860 2986
861 if (cede) 2987 static SV *prio_cv;
862 coro_enq (SvREFCNT_inc (prev)); 2988 static SV *prio_sv;
863 2989
864 next = coro_deq (PRIO_MIN); 2990 if (expect_false (!prio_cv))
2991 {
2992 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
2993 prio_sv = newSViv (0);
2994 }
865 2995
866 if (!next) 2996 PUSHMARK (SP);
867 next = SvREFCNT_inc (GvSV (coro_idle)); 2997 sv_setiv (prio_sv, coro->prio);
2998 XPUSHs (prio_sv);
868 2999
869 GvSV (coro_current) = SvREFCNT_inc (next); 3000 PUTBACK;
870 transfer (aTHX_ 3001 call_sv (prio_cv, G_VOID | G_DISCARD);
871 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 3002 }
872 sv_to_coro (next, "Coro::schedule", "next coroutine"),
873 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
874 SvREFCNT_dec (next);
875 SvREFCNT_dec (prev);
876}
877 3003
3004 /* now call the original request */
3005 {
3006 dSP;
3007 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3008 int i;
3009
3010 PUSHMARK (SP);
3011
3012 /* first push all args to the stack */
3013 EXTEND (SP, items + 1);
3014
3015 for (i = 0; i < items; ++i)
3016 PUSHs (arg [i]);
3017
3018 /* now push the callback closure */
3019 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3020
3021 /* now call the AIO function - we assume our request is uncancelable */
3022 PUTBACK;
3023 call_sv ((SV *)req, G_VOID | G_DISCARD);
3024 }
3025
3026 /* now that the request is going, we loop till we have a result */
3027 frame->data = (void *)state;
3028 frame->prepare = prepare_schedule;
3029 frame->check = slf_check_aio_req;
3030}
3031
3032static void
3033coro_aio_req_xs (pTHX_ CV *cv)
3034{
3035 dXSARGS;
3036
3037 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3038
3039 XSRETURN_EMPTY;
3040}
3041
3042/*****************************************************************************/
3043
3044#if CORO_CLONE
3045# include "clone.c"
3046#endif
3047
3048/*****************************************************************************/
3049
3050static SV *
3051coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3052{
3053 SV *coro_sv;
3054 struct coro *coro;
3055 MAGIC *mg;
3056 HV *hv;
3057 SV *cb;
3058 int i;
3059
3060 if (argc > 0)
3061 {
3062 cb = s_get_cv_croak (argv [0]);
3063
3064 if (!is_coro)
3065 {
3066 if (CvISXSUB (cb))
3067 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3068
3069 if (!CvROOT (cb))
3070 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3071 }
3072 }
3073
3074 Newz (0, coro, 1, struct coro);
3075 coro->args = newAV ();
3076 coro->flags = CF_NEW;
3077
3078 if (coro_first) coro_first->prev = coro;
3079 coro->next = coro_first;
3080 coro_first = coro;
3081
3082 coro->hv = hv = newHV ();
3083 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3084 mg->mg_flags |= MGf_DUP;
3085 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3086
3087 if (argc > 0)
3088 {
3089 av_extend (coro->args, argc + is_coro - 1);
3090
3091 if (is_coro)
3092 {
3093 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3094 cb = (SV *)cv_coro_run;
3095 }
3096
3097 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3098
3099 for (i = 1; i < argc; i++)
3100 av_push (coro->args, newSVsv (argv [i]));
3101 }
3102
3103 return coro_sv;
3104}
3105
878MODULE = Coro::State PACKAGE = Coro::State 3106MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879 3107
880PROTOTYPES: ENABLE 3108PROTOTYPES: DISABLE
881 3109
882BOOT: 3110BOOT:
883{ /* {} necessary for stoopid perl-5.6.x */ 3111{
884 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3112#ifdef USE_ITHREADS
885 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3113# if CORO_PTHREAD
3114 coro_thx = PERL_GET_CONTEXT;
3115# endif
3116#endif
3117 BOOT_PAGESIZE;
3118
3119 cctx_current = cctx_new_empty ();
3120
3121 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3122 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3123
3124 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3125 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3126 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3127
3128 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3129 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3130 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3131
886 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3132 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887 3133
888 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3134 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3135 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3136 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3137 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893 if (!padlist_cache)
894 padlist_cache = newHV ();
895 3138
896 main_mainstack = PL_mainstack; 3139 main_mainstack = PL_mainstack;
3140 main_top_env = PL_top_env;
897 3141
3142 while (main_top_env->je_prev)
3143 main_top_env = main_top_env->je_prev;
3144
3145 {
3146 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3147
3148 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3149 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3150
3151 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3152 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3153 }
3154
898 coroapi.ver = CORO_API_VERSION; 3155 coroapi.ver = CORO_API_VERSION;
3156 coroapi.rev = CORO_API_REVISION;
3157
899 coroapi.transfer = api_transfer; 3158 coroapi.transfer = api_transfer;
900}
901 3159
902Coro::State 3160 coroapi.sv_state = SvSTATE_;
903_newprocess(args) 3161 coroapi.execute_slf = api_execute_slf;
904 SV * args 3162 coroapi.prepare_nop = prepare_nop;
3163 coroapi.prepare_schedule = prepare_schedule;
3164 coroapi.prepare_cede = prepare_cede;
3165 coroapi.prepare_cede_notself = prepare_cede_notself;
3166
3167 time_init (aTHX);
3168
3169 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3170}
3171
3172SV *
3173new (SV *klass, ...)
3174 ALIAS:
3175 Coro::new = 1
3176 CODE:
3177 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3178 OUTPUT:
3179 RETVAL
3180
3181void
3182transfer (...)
3183 PROTOTYPE: $$
3184 CODE:
3185 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3186
3187bool
3188_destroy (SV *coro_sv)
3189 CODE:
3190 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
3191 OUTPUT:
3192 RETVAL
3193
3194void
3195_exit (int code)
905 PROTOTYPE: $ 3196 PROTOTYPE: $
3197 CODE:
3198 _exit (code);
3199
3200SV *
3201clone (Coro::State coro)
3202 CODE:
3203{
3204#if CORO_CLONE
3205 struct coro *ncoro = coro_clone (aTHX_ coro);
3206 MAGIC *mg;
3207 /* TODO: too much duplication */
3208 ncoro->hv = newHV ();
3209 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3210 mg->mg_flags |= MGf_DUP;
3211 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3212#else
3213 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3214#endif
3215}
3216 OUTPUT:
3217 RETVAL
3218
3219int
3220cctx_stacksize (int new_stacksize = 0)
3221 PROTOTYPE: ;$
3222 CODE:
3223 RETVAL = cctx_stacksize;
3224 if (new_stacksize)
3225 {
3226 cctx_stacksize = new_stacksize;
3227 ++cctx_gen;
3228 }
3229 OUTPUT:
3230 RETVAL
3231
3232int
3233cctx_max_idle (int max_idle = 0)
3234 PROTOTYPE: ;$
3235 CODE:
3236 RETVAL = cctx_max_idle;
3237 if (max_idle > 1)
3238 cctx_max_idle = max_idle;
3239 OUTPUT:
3240 RETVAL
3241
3242int
3243cctx_count ()
3244 PROTOTYPE:
3245 CODE:
3246 RETVAL = cctx_count;
3247 OUTPUT:
3248 RETVAL
3249
3250int
3251cctx_idle ()
3252 PROTOTYPE:
3253 CODE:
3254 RETVAL = cctx_idle;
3255 OUTPUT:
3256 RETVAL
3257
3258void
3259list ()
3260 PROTOTYPE:
3261 PPCODE:
3262{
3263 struct coro *coro;
3264 for (coro = coro_first; coro; coro = coro->next)
3265 if (coro->hv)
3266 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3267}
3268
3269void
3270call (Coro::State coro, SV *coderef)
3271 ALIAS:
3272 eval = 1
3273 CODE:
3274{
3275 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3276 {
3277 struct coro *current = SvSTATE_current;
3278
3279 if (current != coro)
3280 {
3281 PUTBACK;
3282 save_perl (aTHX_ current);
3283 load_perl (aTHX_ coro);
3284 SPAGAIN;
3285 }
3286
3287 PUSHSTACK;
3288
3289 PUSHMARK (SP);
3290 PUTBACK;
3291
3292 if (ix)
3293 eval_sv (coderef, 0);
3294 else
3295 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3296
3297 POPSTACK;
3298 SPAGAIN;
3299
3300 if (current != coro)
3301 {
3302 PUTBACK;
3303 save_perl (aTHX_ coro);
3304 load_perl (aTHX_ current);
3305 SPAGAIN;
3306 }
3307 }
3308}
3309
3310SV *
3311is_ready (Coro::State coro)
3312 PROTOTYPE: $
3313 ALIAS:
3314 is_ready = CF_READY
3315 is_running = CF_RUNNING
3316 is_new = CF_NEW
3317 is_destroyed = CF_DESTROYED
3318 is_suspended = CF_SUSPENDED
3319 CODE:
3320 RETVAL = boolSV (coro->flags & ix);
3321 OUTPUT:
3322 RETVAL
3323
3324void
3325throw (Coro::State self, SV *exception = &PL_sv_undef)
3326 PROTOTYPE: $;$
906 CODE: 3327 CODE:
907 Coro__State coro; 3328{
3329 struct coro *current = SvSTATE_current;
3330 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3331 SvREFCNT_dec (*exceptionp);
3332 SvGETMAGIC (exception);
3333 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3334}
908 3335
909 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3336void
910 croak ("Coro::State::_newprocess expects an arrayref"); 3337api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3338 PROTOTYPE: $;$
3339 C_ARGS: aTHX_ coro, flags
3340
3341SV *
3342has_cctx (Coro::State coro)
3343 PROTOTYPE: $
3344 CODE:
3345 /* maybe manage the running flag differently */
3346 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3347 OUTPUT:
3348 RETVAL
3349
3350int
3351is_traced (Coro::State coro)
3352 PROTOTYPE: $
3353 CODE:
3354 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3355 OUTPUT:
3356 RETVAL
3357
3358UV
3359rss (Coro::State coro)
3360 PROTOTYPE: $
3361 ALIAS:
3362 usecount = 1
3363 CODE:
3364 switch (ix)
3365 {
3366 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3367 case 1: RETVAL = coro->usecount; break;
911 3368 }
912 New (0, coro, 1, struct coro); 3369 OUTPUT:
913
914 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
915 coro->mainstack = 0; /* actual work is done inside transfer */
916 coro->stack = 0;
917
918 RETVAL = coro; 3370 RETVAL
3371
3372void
3373force_cctx ()
3374 PROTOTYPE:
3375 CODE:
3376 cctx_current->idle_sp = 0;
3377
3378void
3379swap_defsv (Coro::State self)
3380 PROTOTYPE: $
3381 ALIAS:
3382 swap_defav = 1
3383 CODE:
3384 if (!self->slot)
3385 croak ("cannot swap state with coroutine that has no saved state,");
3386 else
3387 {
3388 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3389 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3390
3391 SV *tmp = *src; *src = *dst; *dst = tmp;
3392 }
3393
3394void
3395cancel (Coro::State self)
3396 CODE:
3397 coro_state_destroy (aTHX_ self);
3398 coro_call_on_destroy (aTHX_ self); /* actually only for Coro objects */
3399
3400
3401SV *
3402enable_times (int enabled = enable_times)
3403 CODE:
3404{
3405 RETVAL = boolSV (enable_times);
3406
3407 if (enabled != enable_times)
3408 {
3409 enable_times = enabled;
3410
3411 coro_times_update ();
3412 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3413 }
3414}
919 OUTPUT: 3415 OUTPUT:
920 RETVAL 3416 RETVAL
921 3417
922void 3418void
923transfer(prev, next, flags) 3419times (Coro::State self)
924 Coro::State_or_hashref prev 3420 PPCODE:
925 Coro::State_or_hashref next 3421{
926 int flags 3422 struct coro *current = SvSTATE (coro_current);
927 PROTOTYPE: @ 3423
3424 if (expect_false (current == self))
3425 {
3426 coro_times_update ();
3427 coro_times_add (SvSTATE (coro_current));
3428 }
3429
3430 EXTEND (SP, 2);
3431 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3432 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3433
3434 if (expect_false (current == self))
3435 coro_times_sub (SvSTATE (coro_current));
3436}
3437
3438void
3439swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3440 CODE:
3441{
3442 struct coro *current = SvSTATE_current;
3443
3444 if (current == coro)
3445 SWAP_SVS (current);
3446
3447 if (!coro->swap_sv)
3448 coro->swap_sv = newAV ();
3449
3450 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3451 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3452
3453 if (current == coro)
3454 SWAP_SVS (current);
3455}
3456
3457
3458MODULE = Coro::State PACKAGE = Coro
3459
3460BOOT:
3461{
3462 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3463 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3464 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3465 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3466 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3467 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3468 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3469 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3470 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3471
3472 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3473 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3474 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3475 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3476
3477 coro_stash = gv_stashpv ("Coro", TRUE);
3478
3479 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3480 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3481 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3482 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3483 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3484 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3485
3486 {
3487 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3488
3489 coroapi.schedule = api_schedule;
3490 coroapi.schedule_to = api_schedule_to;
3491 coroapi.cede = api_cede;
3492 coroapi.cede_notself = api_cede_notself;
3493 coroapi.ready = api_ready;
3494 coroapi.is_ready = api_is_ready;
3495 coroapi.nready = coro_nready;
3496 coroapi.current = coro_current;
3497
3498 /*GCoroAPI = &coroapi;*/
3499 sv_setiv (sv, (IV)&coroapi);
3500 SvREADONLY_on (sv);
3501 }
3502}
3503
3504SV *
3505async (...)
3506 PROTOTYPE: &@
928 CODE: 3507 CODE:
929 PUTBACK; 3508 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
930 transfer (aTHX_ prev, next, flags); 3509 api_ready (aTHX_ RETVAL);
931 SPAGAIN; 3510 OUTPUT:
3511 RETVAL
932 3512
933void 3513void
934DESTROY(coro) 3514terminate (...)
935 Coro::State coro 3515 CODE:
936 CODE: 3516 CORO_EXECUTE_SLF_XS (slf_init_terminate);
937
938 if (coro->mainstack && coro->mainstack != main_mainstack)
939 {
940 struct coro temp;
941
942 PUTBACK;
943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
944 LOAD(aTHX_ coro);
945 SPAGAIN;
946
947 destroy_stacks (aTHX);
948
949 LOAD((&temp)); /* this will get rid of defsv etc.. */
950 SPAGAIN;
951
952 coro->mainstack = 0;
953 }
954
955 deallocate_stack (coro);
956
957 Safefree (coro);
958 3517
959void 3518void
960flush() 3519schedule (...)
961 CODE: 3520 CODE:
962#ifdef MAY_FLUSH 3521 CORO_EXECUTE_SLF_XS (slf_init_schedule);
963 flush_padlist_cache ();
964#endif
965 3522
966void 3523void
967_exit(code) 3524schedule_to (...)
968 int code 3525 CODE:
3526 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3527
3528void
3529cede_to (...)
3530 CODE:
3531 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3532
3533void
3534cede (...)
3535 CODE:
3536 CORO_EXECUTE_SLF_XS (slf_init_cede);
3537
3538void
3539cede_notself (...)
3540 CODE:
3541 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3542
3543void
3544_set_current (SV *current)
969 PROTOTYPE: $ 3545 PROTOTYPE: $
970 CODE: 3546 CODE:
971#if defined(__GLIBC__) || _POSIX_C_SOURCE 3547 SvREFCNT_dec (SvRV (coro_current));
972 _exit (code); 3548 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
973#else
974 signal (SIGTERM, SIG_DFL);
975 raise (SIGTERM);
976 exit (code);
977#endif
978
979MODULE = Coro::State PACKAGE = Coro::Cont
980
981# this is slightly dirty (should expose a c-level api)
982 3549
983void 3550void
984yield(...) 3551_set_readyhook (SV *hook)
985 PROTOTYPE: @ 3552 PROTOTYPE: $
986 CODE: 3553 CODE:
987 static SV *returnstk;
988 SV *sv;
989 AV *defav = GvAV (PL_defgv);
990 struct coro *prev, *next;
991
992 if (!returnstk)
993 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995 /* set up @_ -- ugly */
996 av_clear (defav);
997 av_fill (defav, items - 1);
998 while (items--)
999 av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002 sv = av_pop ((AV *)SvRV (returnstk));
1003 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1004 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1005 SvREFCNT_dec (sv); 3554 SvREFCNT_dec (coro_readyhook);
1006 3555 SvGETMAGIC (hook);
1007 transfer(aTHX_ prev, next, 0); 3556 if (SvOK (hook))
1008 3557 {
1009MODULE = Coro::State PACKAGE = Coro
1010
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT:
1014{
1015 int i;
1016 HV *stash = gv_stashpv ("Coro", TRUE);
1017
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024
1025 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029 coro_ready[i] = newAV (); 3558 coro_readyhook = newSVsv (hook);
1030 3559 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1031 {
1032 SV *sv = perl_get_sv("Coro::API", 1);
1033
1034 coroapi.schedule = api_schedule;
1035 coroapi.ready = api_ready;
1036 coroapi.nready = &coro_nready;
1037 coroapi.current = coro_current;
1038
1039 GCoroAPI = &coroapi;
1040 sv_setiv(sv, (IV)&coroapi);
1041 SvREADONLY_on(sv);
1042 } 3560 }
1043} 3561 else
3562 {
3563 coro_readyhook = 0;
3564 CORO_READYHOOK = 0;
3565 }
1044 3566
1045void 3567int
3568prio (Coro::State coro, int newprio = 0)
3569 PROTOTYPE: $;$
3570 ALIAS:
3571 nice = 1
3572 CODE:
3573{
3574 RETVAL = coro->prio;
3575
3576 if (items > 1)
3577 {
3578 if (ix)
3579 newprio = coro->prio - newprio;
3580
3581 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3582 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3583
3584 coro->prio = newprio;
3585 }
3586}
3587 OUTPUT:
3588 RETVAL
3589
3590SV *
1046ready(self) 3591ready (SV *self)
1047 SV * self
1048 PROTOTYPE: $ 3592 PROTOTYPE: $
1049 CODE: 3593 CODE:
1050 api_ready (self); 3594 RETVAL = boolSV (api_ready (aTHX_ self));
3595 OUTPUT:
3596 RETVAL
1051 3597
1052int 3598int
1053nready(...) 3599nready (...)
1054 PROTOTYPE: 3600 PROTOTYPE:
1055 CODE: 3601 CODE:
1056 RETVAL = coro_nready; 3602 RETVAL = coro_nready;
1057 OUTPUT: 3603 OUTPUT:
1058 RETVAL 3604 RETVAL
1059 3605
1060void 3606void
1061schedule(...) 3607suspend (Coro::State self)
1062 PROTOTYPE: 3608 PROTOTYPE: $
1063 ALIAS:
1064 cede = 1
1065 CODE: 3609 CODE:
1066 api_schedule (ix); 3610 self->flags |= CF_SUSPENDED;
1067 3611
3612void
3613resume (Coro::State self)
3614 PROTOTYPE: $
3615 CODE:
3616 self->flags &= ~CF_SUSPENDED;
3617
3618void
3619_pool_handler (...)
3620 CODE:
3621 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3622
3623void
3624async_pool (SV *cv, ...)
3625 PROTOTYPE: &@
3626 PPCODE:
3627{
3628 HV *hv = (HV *)av_pop (av_async_pool);
3629 AV *av = newAV ();
3630 SV *cb = ST (0);
3631 int i;
3632
3633 av_extend (av, items - 2);
3634 for (i = 1; i < items; ++i)
3635 av_push (av, SvREFCNT_inc_NN (ST (i)));
3636
3637 if ((SV *)hv == &PL_sv_undef)
3638 {
3639 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3640 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3641 SvREFCNT_dec (sv);
3642 }
3643
3644 {
3645 struct coro *coro = SvSTATE_hv (hv);
3646
3647 assert (!coro->invoke_cb);
3648 assert (!coro->invoke_av);
3649 coro->invoke_cb = SvREFCNT_inc (cb);
3650 coro->invoke_av = av;
3651 }
3652
3653 api_ready (aTHX_ (SV *)hv);
3654
3655 if (GIMME_V != G_VOID)
3656 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3657 else
3658 SvREFCNT_dec (hv);
3659}
3660
3661SV *
3662rouse_cb ()
3663 PROTOTYPE:
3664 CODE:
3665 RETVAL = coro_new_rouse_cb (aTHX);
3666 OUTPUT:
3667 RETVAL
3668
3669void
3670rouse_wait (...)
3671 PROTOTYPE: ;$
3672 PPCODE:
3673 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3674
3675void
3676on_enter (SV *block)
3677 ALIAS:
3678 on_leave = 1
3679 PROTOTYPE: &
3680 CODE:
3681{
3682 struct coro *coro = SvSTATE_current;
3683 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3684
3685 block = s_get_cv_croak (block);
3686
3687 if (!*avp)
3688 *avp = newAV ();
3689
3690 av_push (*avp, SvREFCNT_inc (block));
3691
3692 if (!ix)
3693 on_enterleave_call (aTHX_ block);
3694
3695 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3696 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3697 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3698}
3699
3700
3701MODULE = Coro::State PACKAGE = PerlIO::cede
3702
3703BOOT:
3704 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3705
3706
3707MODULE = Coro::State PACKAGE = Coro::Semaphore
3708
3709SV *
3710new (SV *klass, SV *count = 0)
3711 CODE:
3712{
3713 int semcnt = 1;
3714
3715 if (count)
3716 {
3717 SvGETMAGIC (count);
3718
3719 if (SvOK (count))
3720 semcnt = SvIV (count);
3721 }
3722
3723 RETVAL = sv_bless (
3724 coro_waitarray_new (aTHX_ semcnt),
3725 GvSTASH (CvGV (cv))
3726 );
3727}
3728 OUTPUT:
3729 RETVAL
3730
3731# helper for Coro::Channel and others
3732SV *
3733_alloc (int count)
3734 CODE:
3735 RETVAL = coro_waitarray_new (aTHX_ count);
3736 OUTPUT:
3737 RETVAL
3738
3739SV *
3740count (SV *self)
3741 CODE:
3742 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3743 OUTPUT:
3744 RETVAL
3745
3746void
3747up (SV *self, int adjust = 1)
3748 ALIAS:
3749 adjust = 1
3750 CODE:
3751 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3752
3753void
3754down (...)
3755 CODE:
3756 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3757
3758void
3759wait (...)
3760 CODE:
3761 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3762
3763void
3764try (SV *self)
3765 PPCODE:
3766{
3767 AV *av = (AV *)SvRV (self);
3768 SV *count_sv = AvARRAY (av)[0];
3769 IV count = SvIVX (count_sv);
3770
3771 if (count > 0)
3772 {
3773 --count;
3774 SvIVX (count_sv) = count;
3775 XSRETURN_YES;
3776 }
3777 else
3778 XSRETURN_NO;
3779}
3780
3781void
3782waiters (SV *self)
3783 PPCODE:
3784{
3785 AV *av = (AV *)SvRV (self);
3786 int wcount = AvFILLp (av) + 1 - 1;
3787
3788 if (GIMME_V == G_SCALAR)
3789 XPUSHs (sv_2mortal (newSViv (wcount)));
3790 else
3791 {
3792 int i;
3793 EXTEND (SP, wcount);
3794 for (i = 1; i <= wcount; ++i)
3795 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3796 }
3797}
3798
3799MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3800
3801void
3802_may_delete (SV *sem, int count, int extra_refs)
3803 PPCODE:
3804{
3805 AV *av = (AV *)SvRV (sem);
3806
3807 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3808 && AvFILLp (av) == 0 /* no waiters, just count */
3809 && SvIV (AvARRAY (av)[0]) == count)
3810 XSRETURN_YES;
3811
3812 XSRETURN_NO;
3813}
3814
3815MODULE = Coro::State PACKAGE = Coro::Signal
3816
3817SV *
3818new (SV *klass)
3819 CODE:
3820 RETVAL = sv_bless (
3821 coro_waitarray_new (aTHX_ 0),
3822 GvSTASH (CvGV (cv))
3823 );
3824 OUTPUT:
3825 RETVAL
3826
3827void
3828wait (...)
3829 CODE:
3830 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3831
3832void
3833broadcast (SV *self)
3834 CODE:
3835{
3836 AV *av = (AV *)SvRV (self);
3837 coro_signal_wake (aTHX_ av, AvFILLp (av));
3838}
3839
3840void
3841send (SV *self)
3842 CODE:
3843{
3844 AV *av = (AV *)SvRV (self);
3845
3846 if (AvFILLp (av))
3847 coro_signal_wake (aTHX_ av, 1);
3848 else
3849 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3850}
3851
3852IV
3853awaited (SV *self)
3854 CODE:
3855 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3856 OUTPUT:
3857 RETVAL
3858
3859
3860MODULE = Coro::State PACKAGE = Coro::AnyEvent
3861
3862BOOT:
3863 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3864
3865void
3866_schedule (...)
3867 CODE:
3868{
3869 static int incede;
3870
3871 api_cede_notself (aTHX);
3872
3873 ++incede;
3874 while (coro_nready >= incede && api_cede (aTHX))
3875 ;
3876
3877 sv_setsv (sv_activity, &PL_sv_undef);
3878 if (coro_nready >= incede)
3879 {
3880 PUSHMARK (SP);
3881 PUTBACK;
3882 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3883 }
3884
3885 --incede;
3886}
3887
3888
3889MODULE = Coro::State PACKAGE = Coro::AIO
3890
3891void
3892_register (char *target, char *proto, SV *req)
3893 CODE:
3894{
3895 SV *req_cv = s_get_cv_croak (req);
3896 /* newXSproto doesn't return the CV on 5.8 */
3897 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3898 sv_setpv ((SV *)slf_cv, proto);
3899 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3900}
3901
3902MODULE = Coro::State PACKAGE = Coro::Select
3903
3904void
3905patch_pp_sselect ()
3906 CODE:
3907 if (!coro_old_pp_sselect)
3908 {
3909 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
3910 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
3911 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
3912 }
3913
3914void
3915unpatch_pp_sselect ()
3916 CODE:
3917 if (coro_old_pp_sselect)
3918 {
3919 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
3920 coro_old_pp_sselect = 0;
3921 }
3922

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