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Comparing Coro/Coro/State.xs (file contents):
Revision 1.31 by root, Sun Aug 26 16:36:08 2001 UTC vs.
Revision 1.394 by root, Sat Apr 30 05:17:43 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#if defined(_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_ANON
13# ifdef MAP_ANONYMOUS 39# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 40# ifdef 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 labs(l) ((l) >= 0 ? (l) : -(l)) 89#define IN_DESTRUCT PL_dirty
90
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))
32 105
33#include "CoroAPI.h" 106#include "CoroAPI.h"
107#define GCoroAPI (&coroapi) /* very sneaky */
34 108
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;
35static 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 */
36 139
37/* 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 */
38typedef struct { 180typedef struct coro_cctx
39 int refcnt; /* pointer reference counter */ 181{
40 int usecnt; /* shared by how many coroutines */ 182 struct coro_cctx *next;
41 int gencnt; /* generation counter */
42 183
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;
43 coro_context cctx; 192 coro_context cctx;
44 193
45 void *sptr; 194 U32 gen;
46 long ssize; /* positive == mmap, otherwise malloc */ 195#if CORO_USE_VALGRIND
47} coro_stack; 196 int valgrind_id;
197#endif
198 unsigned char flags;
199} coro_cctx;
48 200
201static coro_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 CF_NOCANCEL = 0x0020, /* cannot cancel, set slf_frame.data to 1 (hackish) */
212};
213
214/* the structure where most of the perl state is stored, overlaid on the cxstack */
215typedef struct
216{
217 SV *defsv;
218 AV *defav;
219 SV *errsv;
220 SV *irsgv;
221 HV *hinthv;
222#define VAR(name,type) type name;
223# include "state.h"
224#undef VAR
225} perl_slots;
226
227#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
228
229/* this is a structure representing a perl-level coroutine */
49struct coro { 230struct coro {
50 /* the optional C context */ 231 /* the C coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 232 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 233
55 /* optionally saved, might be zero */ 234 /* ready queue */
56 AV *defav; 235 struct coro *next_ready;
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63 236
64 /* the stacks and related info (callchain etc..) */ 237 /* state data */
65 PERL_SI *curstackinfo; 238 struct CoroSLF slf_frame; /* saved slf frame */
66 AV *curstack;
67 AV *mainstack; 239 AV *mainstack;
68 SV **stack_sp; 240 perl_slots *slot; /* basically the saved sp */
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 241
242 CV *startcv; /* the CV to execute */
92 /* data associated with this coroutine (initial args) */ 243 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 244 int refcnt; /* coroutines are refcounted, yes */
245 int flags; /* CF_ flags */
246 HV *hv; /* the perl hash associated with this coro, if any */
247 void (*on_destroy)(pTHX_ struct coro *coro); /* for temporary use by xs in critical sections */
248
249 /* statistics */
250 int usecount; /* number of transfers to this coro */
251
252 /* coro process data */
253 int prio;
254 SV *except; /* exception to be thrown */
255 SV *rouse_cb;
256
257 /* async_pool */
258 SV *saved_deffh;
259 SV *invoke_cb;
260 AV *invoke_av;
261
262 /* on_enter/on_leave */
263 AV *on_enter;
264 AV *on_leave;
265
266 /* swap_sv */
267 AV *swap_sv;
268
269 /* times */
270 coro_ts t_cpu, t_real;
271
272 /* linked list */
273 struct coro *next, *prev;
94}; 274};
95 275
96typedef struct coro *Coro__State; 276typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 277typedef struct coro *Coro__State_or_hashref;
98 278
99static AV *main_mainstack; /* used to differentiate between $main and others */ 279/* the following variables are effectively part of the perl context */
100static HV *coro_state_stash; 280/* and get copied between struct coro and these variables */
281/* the main reason we don't support windows process emulation */
282static struct CoroSLF slf_frame; /* the current slf frame */
283
284/** Coro ********************************************************************/
285
286#define CORO_PRIO_MAX 3
287#define CORO_PRIO_HIGH 1
288#define CORO_PRIO_NORMAL 0
289#define CORO_PRIO_LOW -1
290#define CORO_PRIO_IDLE -3
291#define CORO_PRIO_MIN -4
292
293/* for Coro.pm */
294static SV *coro_current;
295static SV *coro_readyhook;
296static struct coro *coro_ready [CORO_PRIO_MAX - CORO_PRIO_MIN + 1][2]; /* head|tail */
297static CV *cv_coro_run, *cv_coro_terminate;
298static struct coro *coro_first;
299#define coro_nready coroapi.nready
300
301/** Coro::Select ************************************************************/
302
303static OP *(*coro_old_pp_sselect) (pTHX);
101static SV *ucoro_state_sv; 304static SV *coro_select_select;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104 305
105/* mostly copied from op.c:cv_clone2 */ 306/* horrible hack, but if it works... */
106STATIC AV * 307static OP *
107clone_padlist (AV *protopadlist) 308coro_pp_sselect (pTHX)
108{ 309{
109 AV *av; 310 dSP;
110 I32 ix; 311 PUSHMARK (SP - 4); /* fake argument list */
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 312 XPUSHs (coro_select_select);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 313 PUTBACK;
113 SV **pname = AvARRAY (protopad_name); 314
114 SV **ppad = AvARRAY (protopad); 315 /* entersub is an UNOP, select a LISTOP... keep your fingers crossed */
115 I32 fname = AvFILLp (protopad_name); 316 PL_op->op_flags |= OPf_STACKED;
116 I32 fpad = AvFILLp (protopad); 317 PL_op->op_private = 0;
318 return PL_ppaddr [OP_ENTERSUB](aTHX);
319}
320
321/** time stuff **************************************************************/
322
323#ifdef HAS_GETTIMEOFDAY
324
325static void
326coro_u2time (pTHX_ UV ret[2])
327{
328 struct timeval tv;
329 gettimeofday (&tv, 0);
330
331 ret [0] = tv.tv_sec;
332 ret [1] = tv.tv_usec;
333}
334
335static double
336coro_nvtime ()
337{
338 struct timeval tv;
339 gettimeofday (&tv, 0);
340
341 return tv.tv_sec + tv.tv_usec * 1e-6;
342}
343
344static void
345time_init (pTHX)
346{
347 nvtime = coro_nvtime;
348 u2time = coro_u2time;
349}
350
351#else
352
353static void
354time_init (pTHX)
355{
356 SV **svp;
357
358 require_pv ("Time/HiRes.pm");
359
360 svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
361
362 if (!svp) croak ("Time::HiRes is required, but missing. Caught");
363 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer. Caught");
364
365 nvtime = INT2PTR (double (*)(), SvIV (*svp));
366
367 svp = hv_fetch (PL_modglobal, "Time::U2time", 12, 0);
368 u2time = INT2PTR (void (*)(pTHX_ UV ret[2]), SvIV (*svp));
369}
370
371#endif
372
373/** lowlevel stuff **********************************************************/
374
375static SV *
376coro_get_sv (pTHX_ const char *name, int create)
377{
378#if PERL_VERSION_ATLEAST (5,10,0)
379 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
380 get_sv (name, create);
381#endif
382 return get_sv (name, create);
383}
384
385static AV *
386coro_get_av (pTHX_ const char *name, int create)
387{
388#if PERL_VERSION_ATLEAST (5,10,0)
389 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
390 get_av (name, create);
391#endif
392 return get_av (name, create);
393}
394
395static HV *
396coro_get_hv (pTHX_ const char *name, int create)
397{
398#if PERL_VERSION_ATLEAST (5,10,0)
399 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
400 get_hv (name, create);
401#endif
402 return get_hv (name, create);
403}
404
405INLINE void
406coro_times_update ()
407{
408#ifdef coro_clock_gettime
409 struct timespec ts;
410
411 ts.tv_sec = ts.tv_nsec = 0;
412 coro_clock_gettime (CORO_CLOCK_THREAD_CPUTIME_ID, &ts);
413 time_cpu [0] = ts.tv_sec; time_cpu [1] = ts.tv_nsec;
414
415 ts.tv_sec = ts.tv_nsec = 0;
416 coro_clock_gettime (CORO_CLOCK_MONOTONIC, &ts);
417 time_real [0] = ts.tv_sec; time_real [1] = ts.tv_nsec;
418#else
419 dTHX;
420 UV tv[2];
421
422 u2time (aTHX_ tv);
423 time_real [0] = tv [0];
424 time_real [1] = tv [1] * 1000;
425#endif
426}
427
428INLINE void
429coro_times_add (struct coro *c)
430{
431 c->t_real [1] += time_real [1];
432 if (c->t_real [1] > 1000000000) { c->t_real [1] -= 1000000000; ++c->t_real [0]; }
433 c->t_real [0] += time_real [0];
434
435 c->t_cpu [1] += time_cpu [1];
436 if (c->t_cpu [1] > 1000000000) { c->t_cpu [1] -= 1000000000; ++c->t_cpu [0]; }
437 c->t_cpu [0] += time_cpu [0];
438}
439
440INLINE void
441coro_times_sub (struct coro *c)
442{
443 if (c->t_real [1] < time_real [1]) { c->t_real [1] += 1000000000; --c->t_real [0]; }
444 c->t_real [1] -= time_real [1];
445 c->t_real [0] -= time_real [0];
446
447 if (c->t_cpu [1] < time_cpu [1]) { c->t_cpu [1] += 1000000000; --c->t_cpu [0]; }
448 c->t_cpu [1] -= time_cpu [1];
449 c->t_cpu [0] -= time_cpu [0];
450}
451
452/*****************************************************************************/
453/* magic glue */
454
455#define CORO_MAGIC_type_cv 26
456#define CORO_MAGIC_type_state PERL_MAGIC_ext
457
458#define CORO_MAGIC_NN(sv, type) \
459 (expect_true (SvMAGIC (sv)->mg_type == type) \
460 ? SvMAGIC (sv) \
461 : mg_find (sv, type))
462
463#define CORO_MAGIC(sv, type) \
464 (expect_true (SvMAGIC (sv)) \
465 ? CORO_MAGIC_NN (sv, type) \
466 : 0)
467
468#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
469#define CORO_MAGIC_state(sv) CORO_MAGIC_NN (((SV *)(sv)), CORO_MAGIC_type_state)
470
471INLINE struct coro *
472SvSTATE_ (pTHX_ SV *coro)
473{
474 HV *stash;
475 MAGIC *mg;
476
477 if (SvROK (coro))
478 coro = SvRV (coro);
479
480 if (expect_false (SvTYPE (coro) != SVt_PVHV))
481 croak ("Coro::State object required");
482
483 stash = SvSTASH (coro);
484 if (expect_false (stash != coro_stash && stash != coro_state_stash))
485 {
486 /* very slow, but rare, check */
487 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
488 croak ("Coro::State object required");
489 }
490
491 mg = CORO_MAGIC_state (coro);
492 return (struct coro *)mg->mg_ptr;
493}
494
495#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
496
497/* faster than SvSTATE, but expects a coroutine hv */
498#define SvSTATE_hv(hv) ((struct coro *)CORO_MAGIC_NN ((SV *)hv, CORO_MAGIC_type_state)->mg_ptr)
499#define SvSTATE_current SvSTATE_hv (SvRV (coro_current))
500
501/*****************************************************************************/
502/* padlist management and caching */
503
504static AV *
505coro_derive_padlist (pTHX_ CV *cv)
506{
507 AV *padlist = CvPADLIST (cv);
117 AV *newpadlist, *newpad_name, *newpad; 508 AV *newpadlist, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127 509
128 newpadlist = newAV (); 510 newpadlist = newAV ();
129 AvREAL_off (newpadlist); 511 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name); 512#if PERL_VERSION_ATLEAST (5,10,0)
513 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
514#else
515 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
516#endif
517 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
518 --AvFILLp (padlist);
519
520 av_store (newpadlist, 0, SvREFCNT_inc_NN (AvARRAY (padlist)[0]));
131 av_store (newpadlist, 1, (SV *) newpad); 521 av_store (newpadlist, 1, (SV *)newpad);
132 522
133 av = newAV (); /* will be @_ */ 523 return newpadlist;
134 av_extend (av, 0); 524}
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137 525
138 for (ix = fpad; ix > 0; ix--) 526static void
527free_padlist (pTHX_ AV *padlist)
528{
529 /* may be during global destruction */
530 if (!IN_DESTRUCT)
139 { 531 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 532 I32 i = AvFILLp (padlist);
141 if (namesv && namesv != &PL_sv_undef) 533
534 while (i > 0) /* special-case index 0 */
142 { 535 {
143 char *name = SvPVX (namesv); /* XXX */ 536 /* we try to be extra-careful here */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 537 AV *av = (AV *)AvARRAY (padlist)[i--];
145 { /* lexical from outside? */ 538 I32 j = AvFILLp (av);
146 npad[ix] = SvREFCNT_inc (ppad[ix]); 539
147 } 540 while (j >= 0)
148 else 541 SvREFCNT_dec (AvARRAY (av)[j--]);
149 { /* our own lexical */ 542
150 SV *sv; 543 AvFILLp (av) = -1;
151 if (*name == '&') 544 SvREFCNT_dec (av);
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 } 545 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 546
165 { 547 SvREFCNT_dec (AvARRAY (padlist)[0]);
166 npad[ix] = SvREFCNT_inc (ppad[ix]); 548
167 } 549 AvFILLp (padlist) = -1;
550 SvREFCNT_dec ((SV*)padlist);
551 }
552}
553
554static int
555coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
556{
557 AV *padlist;
558 AV *av = (AV *)mg->mg_obj;
559
560 /* perl manages to free our internal AV and _then_ call us */
561 if (IN_DESTRUCT)
562 return 0;
563
564 /* casting is fun. */
565 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
566 free_padlist (aTHX_ padlist);
567
568 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
569
570 return 0;
571}
572
573static MGVTBL coro_cv_vtbl = {
574 0, 0, 0, 0,
575 coro_cv_free
576};
577
578/* the next two functions merely cache the padlists */
579static void
580get_padlist (pTHX_ CV *cv)
581{
582 MAGIC *mg = CORO_MAGIC_cv (cv);
583 AV *av;
584
585 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
586 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
168 else 587 else
169 { 588 {
170 SV *sv = NEWSV (0, 0); 589#if CORO_PREFER_PERL_FUNCTIONS
171 SvPADTMP_on (sv); 590 /* this is probably cleaner? but also slower! */
172 npad[ix] = sv; 591 /* in practise, it seems to be less stable */
173 } 592 CV *cp = Perl_cv_clone (aTHX_ cv);
174 } 593 CvPADLIST (cv) = CvPADLIST (cp);
175 594 CvPADLIST (cp) = 0;
176#if 0 /* return -ENOTUNDERSTOOD */ 595 SvREFCNT_dec (cp);
177 /* Now that vars are all in place, clone nested closures. */ 596#else
178 597 CvPADLIST (cv) = coro_derive_padlist (aTHX_ cv);
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif 598#endif
195 599 }
196 return newpadlist;
197} 600}
198 601
199#ifdef MAY_FLUSH 602static void
200STATIC void 603put_padlist (pTHX_ CV *cv)
201free_padlist (AV *padlist)
202{ 604{
203 /* may be during global destruction */ 605 MAGIC *mg = CORO_MAGIC_cv (cv);
204 if (SvREFCNT(padlist)) 606 AV *av;
607
608 if (expect_false (!mg))
609 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
610
611 av = (AV *)mg->mg_obj;
612
613 if (expect_false (AvFILLp (av) >= AvMAX (av)))
614 av_extend (av, AvFILLp (av) + 1);
615
616 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
617}
618
619/** load & save, init *******************************************************/
620
621/* swap sv heads, at least logically */
622static void
623swap_svs (pTHX_ Coro__State c)
624{
625 int i;
626
627 for (i = 0; i <= AvFILLp (c->swap_sv); )
205 { 628 {
206 I32 i = AvFILLp(padlist); 629 SV *a = AvARRAY (c->swap_sv)[i++];
207 while (i >= 0) 630 SV *b = AvARRAY (c->swap_sv)[i++];
631
632 const U32 keep = SVs_PADSTALE | SVs_PADTMP | SVs_PADMY; /* keep these flags */
633 SV tmp;
634
635 /* swap sv_any */
636 SvANY (&tmp) = SvANY (a); SvANY (a) = SvANY (b); SvANY (b) = SvANY (&tmp);
637
638 /* swap sv_flags */
639 SvFLAGS (&tmp) = SvFLAGS (a);
640 SvFLAGS (a) = (SvFLAGS (a) & keep) | (SvFLAGS (b ) & ~keep);
641 SvFLAGS (b) = (SvFLAGS (b) & keep) | (SvFLAGS (&tmp) & ~keep);
642
643#if PERL_VERSION_ATLEAST (5,10,0)
644 /* perl 5.10 complicates this _quite_ a bit, but it also is
645 * much faster, so no quarrels here. alternatively, we could
646 * sv_upgrade to avoid this.
647 */
208 { 648 {
209 SV **svp = av_fetch(padlist, i--, FALSE); 649 /* swap sv_u */
210 SV *sv = svp ? *svp : Nullsv; 650 tmp.sv_u = a->sv_u; a->sv_u = b->sv_u; b->sv_u = tmp.sv_u;
211 if (sv) 651
212 SvREFCNT_dec(sv); 652 /* if SvANY points to the head, we need to adjust the pointers,
653 * as the pointer for a still points to b, and maybe vice versa.
654 */
655 #define svany_in_head(type) \
656 (((1 << SVt_NULL) | (1 << SVt_BIND) | (1 << SVt_IV) | (1 << SVt_RV)) & (1 << (type)))
657
658 if (svany_in_head (SvTYPE (a)))
659 SvANY (a) = (void *)((PTRV)SvANY (a) - (PTRV)b + (PTRV)a);
660
661 if (svany_in_head (SvTYPE (b)))
662 SvANY (b) = (void *)((PTRV)SvANY (b) - (PTRV)a + (PTRV)b);
213 } 663 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif 664#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 { 665 }
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244} 666}
245 667
246#ifdef MAY_FLUSH 668#define SWAP_SVS(coro) \
247STATIC void 669 if (expect_false ((coro)->swap_sv)) \
248flush_padlist_cache () 670 swap_svs (aTHX_ (coro))
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252 671
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void 672static void
673on_enterleave_call (pTHX_ SV *cb);
674
675static void
281load_state(pTHX_ Coro__State c) 676load_perl (pTHX_ Coro__State c)
282{ 677{
283 PL_dowarn = c->dowarn; 678 perl_slots *slot = c->slot;
284 PL_in_eval = c->in_eval; 679 c->slot = 0;
285 680
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack; 681 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312 682
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 683 GvSV (PL_defgv) = slot->defsv;
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 684 GvAV (PL_defgv) = slot->defav;
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 685 GvSV (PL_errgv) = slot->errsv;
686 GvSV (irsgv) = slot->irsgv;
687 GvHV (PL_hintgv) = slot->hinthv;
688
689 #define VAR(name,type) PL_ ## name = slot->name;
690 # include "state.h"
691 #undef VAR
316 692
317 { 693 {
318 dSP; 694 dSP;
695
319 CV *cv; 696 CV *cv;
320 697
321 /* now do the ugly restore mess */ 698 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs)) 699 while (expect_true (cv = (CV *)POPs))
323 { 700 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */ 701 put_padlist (aTHX_ cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist; 702 CvDEPTH (cv) = PTR2IV (POPs);
330#ifdef USE_THREADS 703 CvPADLIST (cv) = (AV *)POPs;
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 } 704 }
337 705
338 PUTBACK; 706 PUTBACK;
339 } 707 }
340}
341 708
709 slf_frame = c->slf_frame;
710 CORO_THROW = c->except;
711
712 if (expect_false (enable_times))
713 {
714 if (expect_false (!times_valid))
715 coro_times_update ();
716
717 coro_times_sub (c);
718 }
719
720 if (expect_false (c->on_enter))
721 {
722 int i;
723
724 for (i = 0; i <= AvFILLp (c->on_enter); ++i)
725 on_enterleave_call (aTHX_ AvARRAY (c->on_enter)[i]);
726 }
727
728 SWAP_SVS (c);
729}
730
342static void 731static void
343save_state(pTHX_ Coro__State c, int flags) 732save_perl (pTHX_ Coro__State c)
344{ 733{
734 SWAP_SVS (c);
735
736 if (expect_false (c->on_leave))
737 {
738 int i;
739
740 for (i = AvFILLp (c->on_leave); i >= 0; --i)
741 on_enterleave_call (aTHX_ AvARRAY (c->on_leave)[i]);
742 }
743
744 times_valid = 0;
745
746 if (expect_false (enable_times))
747 {
748 coro_times_update (); times_valid = 1;
749 coro_times_add (c);
750 }
751
752 c->except = CORO_THROW;
753 c->slf_frame = slf_frame;
754
345 { 755 {
346 dSP; 756 dSP;
347 I32 cxix = cxstack_ix; 757 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack; 758 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo; 759 PERL_SI *top_si = PL_curstackinfo;
… …
351 /* 761 /*
352 * the worst thing you can imagine happens first - we have to save 762 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :( 763 * (and reinitialize) all cv's in the whole callchain :(
354 */ 764 */
355 765
356 PUSHs (Nullsv); 766 XPUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */ 767 /* this loop was inspired by pp_caller */
358 for (;;) 768 for (;;)
359 { 769 {
360 while (cxix >= 0) 770 while (expect_true (cxix >= 0))
361 { 771 {
362 PERL_CONTEXT *cx = &ccstk[cxix--]; 772 PERL_CONTEXT *cx = &ccstk[cxix--];
363 773
364 if (CxTYPE(cx) == CXt_SUB) 774 if (expect_true (CxTYPE (cx) == CXt_SUB) || expect_false (CxTYPE (cx) == CXt_FORMAT))
365 { 775 {
366 CV *cv = cx->blk_sub.cv; 776 CV *cv = cx->blk_sub.cv;
777
367 if (CvDEPTH(cv)) 778 if (expect_true (CvDEPTH (cv)))
368 { 779 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2); 780 EXTEND (SP, 3);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv)); 781 PUSHs ((SV *)CvPADLIST (cv));
782 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
384 PUSHs ((SV *)cv); 783 PUSHs ((SV *)cv);
385 784
386 get_padlist (cv); /* this is a monster */ 785 CvDEPTH (cv) = 0;
786 get_padlist (aTHX_ cv);
387 } 787 }
388 } 788 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 } 789 }
396 790
397 if (top_si->si_type == PERLSI_MAIN) 791 if (expect_true (top_si->si_type == PERLSI_MAIN))
398 break; 792 break;
399 793
400 top_si = top_si->si_prev; 794 top_si = top_si->si_prev;
401 ccstk = top_si->si_cxstack; 795 ccstk = top_si->si_cxstack;
402 cxix = top_si->si_cxix; 796 cxix = top_si->si_cxix;
403 } 797 }
404 798
405 PUTBACK; 799 PUTBACK;
406 } 800 }
407 801
408 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 802 /* allocate some space on the context stack for our purposes */
409 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 803 /* we manually unroll here, as usually 2 slots is enough */
410 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 804 if (SLOT_COUNT >= 1) CXINC;
805 if (SLOT_COUNT >= 2) CXINC;
806 if (SLOT_COUNT >= 3) CXINC;
807 {
808 unsigned int i;
809 for (i = 3; i < SLOT_COUNT; ++i)
810 CXINC;
811 }
812 cxstack_ix -= SLOT_COUNT; /* undo allocation */
411 813
412 c->dowarn = PL_dowarn;
413 c->in_eval = PL_in_eval;
414
415 c->curstackinfo = PL_curstackinfo;
416 c->curstack = PL_curstack;
417 c->mainstack = PL_mainstack; 814 c->mainstack = PL_mainstack;
418 c->stack_sp = PL_stack_sp; 815
419 c->op = PL_op; 816 {
420 c->curpad = PL_curpad; 817 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
421 c->stack_base = PL_stack_base; 818
422 c->stack_max = PL_stack_max; 819 slot->defav = GvAV (PL_defgv);
423 c->tmps_stack = PL_tmps_stack; 820 slot->defsv = DEFSV;
424 c->tmps_floor = PL_tmps_floor; 821 slot->errsv = ERRSV;
425 c->tmps_ix = PL_tmps_ix; 822 slot->irsgv = GvSV (irsgv);
426 c->tmps_max = PL_tmps_max; 823 slot->hinthv = GvHV (PL_hintgv);
427 c->markstack = PL_markstack; 824
428 c->markstack_ptr = PL_markstack_ptr; 825 #define VAR(name,type) slot->name = PL_ ## name;
429 c->markstack_max = PL_markstack_max; 826 # include "state.h"
430 c->scopestack = PL_scopestack; 827 #undef VAR
431 c->scopestack_ix = PL_scopestack_ix; 828 }
432 c->scopestack_max = PL_scopestack_max;
433 c->savestack = PL_savestack;
434 c->savestack_ix = PL_savestack_ix;
435 c->savestack_max = PL_savestack_max;
436 c->retstack = PL_retstack;
437 c->retstack_ix = PL_retstack_ix;
438 c->retstack_max = PL_retstack_max;
439 c->curcop = PL_curcop;
440 c->top_env = PL_top_env;
441} 829}
442 830
443/* 831/*
444 * allocate various perl stacks. This is an exact copy 832 * allocate various perl stacks. This is almost an exact copy
445 * of perl.c:init_stacks, except that it uses less memory 833 * of perl.c:init_stacks, except that it uses less memory
446 * on the assumption that coroutines do not usually need 834 * on the (sometimes correct) assumption that coroutines do
447 * a lot of stackspace. 835 * not usually need a lot of stackspace.
448 */ 836 */
449STATIC void 837#if CORO_PREFER_PERL_FUNCTIONS
838# define coro_init_stacks(thx) init_stacks ()
839#else
840static void
450coro_init_stacks (pTHX) 841coro_init_stacks (pTHX)
451{ 842{
452 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 843 PL_curstackinfo = new_stackinfo(32, 8);
453 PL_curstackinfo->si_type = PERLSI_MAIN; 844 PL_curstackinfo->si_type = PERLSI_MAIN;
454 PL_curstack = PL_curstackinfo->si_stack; 845 PL_curstack = PL_curstackinfo->si_stack;
455 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 846 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456 847
457 PL_stack_base = AvARRAY(PL_curstack); 848 PL_stack_base = AvARRAY(PL_curstack);
458 PL_stack_sp = PL_stack_base; 849 PL_stack_sp = PL_stack_base;
459 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 850 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460 851
461 New(50,PL_tmps_stack,96,SV*); 852 New(50,PL_tmps_stack,32,SV*);
462 PL_tmps_floor = -1; 853 PL_tmps_floor = -1;
463 PL_tmps_ix = -1; 854 PL_tmps_ix = -1;
464 PL_tmps_max = 96; 855 PL_tmps_max = 32;
465 856
466 New(54,PL_markstack,16,I32); 857 New(54,PL_markstack,16,I32);
467 PL_markstack_ptr = PL_markstack; 858 PL_markstack_ptr = PL_markstack;
468 PL_markstack_max = PL_markstack + 16; 859 PL_markstack_max = PL_markstack + 16;
469 860
861#ifdef SET_MARK_OFFSET
470 SET_MARK_OFFSET; 862 SET_MARK_OFFSET;
863#endif
471 864
472 New(54,PL_scopestack,16,I32); 865 New(54,PL_scopestack,8,I32);
473 PL_scopestack_ix = 0; 866 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16; 867 PL_scopestack_max = 8;
475 868
476 New(54,PL_savestack,96,ANY); 869 New(54,PL_savestack,24,ANY);
477 PL_savestack_ix = 0; 870 PL_savestack_ix = 0;
478 PL_savestack_max = 96; 871 PL_savestack_max = 24;
479 872
873#if !PERL_VERSION_ATLEAST (5,10,0)
480 New(54,PL_retstack,8,OP*); 874 New(54,PL_retstack,4,OP*);
481 PL_retstack_ix = 0; 875 PL_retstack_ix = 0;
482 PL_retstack_max = 8; 876 PL_retstack_max = 4;
877#endif
483} 878}
879#endif
484 880
485/* 881/*
486 * destroy the stacks, the callchain etc... 882 * destroy the stacks, the callchain etc...
487 * still there is a memleak of 128 bytes...
488 */ 883 */
489STATIC void 884static void
490destroy_stacks(pTHX) 885coro_destruct_stacks (pTHX)
491{ 886{
492 int destruct = PL_main_cv != Nullcv;
493
494 if (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) 887 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next; 888 PL_curstackinfo = PL_curstackinfo->si_next;
507 889
508 while (PL_curstackinfo) 890 while (PL_curstackinfo)
509 { 891 {
510 PERL_SI *p = PL_curstackinfo->si_prev; 892 PERL_SI *p = PL_curstackinfo->si_prev;
511 893
512 { 894 if (!IN_DESTRUCT)
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (destruct)
519 {
520 dounwind(-1);
521 SvREFCNT_dec(PL_curstackinfo->si_stack); 895 SvREFCNT_dec (PL_curstackinfo->si_stack);
522 }
523 896
524 Safefree(PL_curstackinfo->si_cxstack); 897 Safefree (PL_curstackinfo->si_cxstack);
525 Safefree(PL_curstackinfo); 898 Safefree (PL_curstackinfo);
526 PL_curstackinfo = p; 899 PL_curstackinfo = p;
527 } 900 }
528 901
529 Safefree(PL_tmps_stack); 902 Safefree (PL_tmps_stack);
530 Safefree(PL_markstack); 903 Safefree (PL_markstack);
531 Safefree(PL_scopestack); 904 Safefree (PL_scopestack);
532 Safefree(PL_savestack); 905 Safefree (PL_savestack);
906#if !PERL_VERSION_ATLEAST (5,10,0)
533 Safefree(PL_retstack); 907 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_ANON, 0, 0);
551 if (stack->sptr == (void *)-1)
552#endif 908#endif
909}
910
911#define CORO_RSS \
912 rss += sizeof (SYM (curstackinfo)); \
913 rss += (SYM (curstackinfo->si_cxmax) + 1) * sizeof (PERL_CONTEXT); \
914 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (SYM (curstack))) * sizeof (SV *); \
915 rss += SYM (tmps_max) * sizeof (SV *); \
916 rss += (SYM (markstack_max) - SYM (markstack_ptr)) * sizeof (I32); \
917 rss += SYM (scopestack_max) * sizeof (I32); \
918 rss += SYM (savestack_max) * sizeof (ANY);
919
920static size_t
921coro_rss (pTHX_ struct coro *coro)
922{
923 size_t rss = sizeof (*coro);
924
925 if (coro->mainstack)
926 {
927 if (coro->flags & CF_RUNNING)
553 { 928 {
554 /*FIXME*//*D*//* reasonable stack size! */ 929 #define SYM(sym) PL_ ## sym
555 stack->ssize = -4096 * sizeof (long); 930 CORO_RSS;
556 New (0, stack->sptr, 4096, long); 931 #undef SYM
557 } 932 }
558 }
559 else 933 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 { 934 {
576#ifdef HAVE_MMAP 935 #define SYM(sym) coro->slot->sym
577 if (stack->ssize > 0 && stack->sptr) 936 CORO_RSS;
578 munmap (stack->sptr, stack->ssize); 937 #undef SYM
579 else 938 }
580#else 939 }
581 Safefree (stack->sptr); 940
941 return rss;
942}
943
944/** coroutine stack handling ************************************************/
945
946static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
947static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
948static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
949
950/* apparently < 5.8.8 */
951#ifndef MgPV_nolen_const
952#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
953 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
954 (const char*)(mg)->mg_ptr)
582#endif 955#endif
583 Safefree (stack); 956
957/*
958 * This overrides the default magic get method of %SIG elements.
959 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
960 * and instead of trying to save and restore the hash elements, we just provide
961 * readback here.
962 */
963static int
964coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
965{
966 const char *s = MgPV_nolen_const (mg);
967
968 if (*s == '_')
969 {
970 SV **svp = 0;
971
972 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
973 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
974
975 if (svp)
976 {
977 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
978 return 0;
584 } 979 }
585 else if (ctx->gencnt == stack->gencnt) 980 }
586 --stack->usecnt; 981
982 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
983}
984
985static int
986coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
987{
988 const char *s = MgPV_nolen_const (mg);
989
990 if (*s == '_')
587 } 991 {
588} 992 SV **svp = 0;
589 993
994 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
995 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
996
997 if (svp)
998 {
999 SV *old = *svp;
1000 *svp = 0;
1001 SvREFCNT_dec (old);
1002 return 0;
1003 }
1004 }
1005
1006 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
1007}
1008
590static void 1009static int
591setup_coro (void *arg) 1010coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
1011{
1012 const char *s = MgPV_nolen_const (mg);
1013
1014 if (*s == '_')
1015 {
1016 SV **svp = 0;
1017
1018 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
1019 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
1020
1021 if (svp)
1022 {
1023 SV *old = *svp;
1024 *svp = SvOK (sv) ? newSVsv (sv) : 0;
1025 SvREFCNT_dec (old);
1026 return 0;
1027 }
1028 }
1029
1030 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
1031}
1032
1033static void
1034prepare_nop (pTHX_ struct coro_transfer_args *ta)
1035{
1036 /* kind of mega-hacky, but works */
1037 ta->next = ta->prev = (struct coro *)ta;
1038}
1039
1040static int
1041slf_check_nop (pTHX_ struct CoroSLF *frame)
1042{
1043 return 0;
1044}
1045
1046static int
1047slf_check_repeat (pTHX_ struct CoroSLF *frame)
1048{
1049 return 1;
1050}
1051
1052static UNOP init_perl_op;
1053
1054static void NOINLINE /* noinline to keep it out of the transfer fast path */
1055init_perl (pTHX_ struct coro *coro)
592{ 1056{
593 /* 1057 /*
594 * emulate part of the perl startup here. 1058 * emulate part of the perl startup here.
595 */ 1059 */
1060 coro_init_stacks (aTHX);
1061
1062 PL_runops = RUNOPS_DEFAULT;
1063 PL_curcop = &PL_compiling;
1064 PL_in_eval = EVAL_NULL;
1065 PL_comppad = 0;
1066 PL_comppad_name = 0;
1067 PL_comppad_name_fill = 0;
1068 PL_comppad_name_floor = 0;
1069 PL_curpm = 0;
1070 PL_curpad = 0;
1071 PL_localizing = 0;
1072 PL_restartop = 0;
1073#if PERL_VERSION_ATLEAST (5,10,0)
1074 PL_parser = 0;
1075#endif
1076 PL_hints = 0;
1077
1078 /* recreate the die/warn hooks */
1079 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
1080 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
1081
1082 GvSV (PL_defgv) = newSV (0);
1083 GvAV (PL_defgv) = coro->args; coro->args = 0;
1084 GvSV (PL_errgv) = newSV (0);
1085 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
1086 GvHV (PL_hintgv) = 0;
1087 PL_rs = newSVsv (GvSV (irsgv));
1088 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
1089
1090 {
1091 dSP;
1092 UNOP myop;
1093
1094 Zero (&myop, 1, UNOP);
1095 myop.op_next = Nullop;
1096 myop.op_type = OP_ENTERSUB;
1097 myop.op_flags = OPf_WANT_VOID;
1098
1099 PUSHMARK (SP);
1100 PUSHs ((SV *)coro->startcv);
1101 PUTBACK;
1102 PL_op = (OP *)&myop;
1103 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1104 }
1105
1106 /* this newly created coroutine might be run on an existing cctx which most
1107 * likely was suspended in pp_slf, so we have to emulate entering pp_slf here.
1108 */
1109 slf_frame.prepare = prepare_nop; /* provide a nop function for an eventual pp_slf */
1110 slf_frame.check = slf_check_nop; /* signal pp_slf to not repeat */
1111
1112 /* and we have to provide the pp_slf op in any case, so pp_slf can skip it */
1113 init_perl_op.op_next = PL_op;
1114 init_perl_op.op_type = OP_ENTERSUB;
1115 init_perl_op.op_ppaddr = pp_slf;
1116 /* no flags etc. required, as an init function won't be called */
1117
1118 PL_op = (OP *)&init_perl_op;
1119
1120 /* copy throw, in case it was set before init_perl */
1121 CORO_THROW = coro->except;
1122
1123 SWAP_SVS (coro);
1124
1125 if (expect_false (enable_times))
1126 {
1127 coro_times_update ();
1128 coro_times_sub (coro);
1129 }
1130}
1131
1132static void
1133coro_unwind_stacks (pTHX)
1134{
1135 if (!IN_DESTRUCT)
1136 {
1137 /* restore all saved variables and stuff */
1138 LEAVE_SCOPE (0);
1139 assert (PL_tmps_floor == -1);
1140
1141 /* free all temporaries */
1142 FREETMPS;
1143 assert (PL_tmps_ix == -1);
1144
1145 /* unwind all extra stacks */
1146 POPSTACK_TO (PL_mainstack);
1147
1148 /* unwind main stack */
1149 dounwind (-1);
1150 }
1151}
1152
1153static void
1154destroy_perl (pTHX_ struct coro *coro)
1155{
1156 SV *svf [9];
1157
1158 {
1159 struct coro *current = SvSTATE_current;
1160
1161 assert (("FATAL: tried to destroy currently running coroutine", coro->mainstack != PL_mainstack));
1162
1163 save_perl (aTHX_ current);
1164 load_perl (aTHX_ coro);
1165
1166 coro_unwind_stacks (aTHX);
1167 coro_destruct_stacks (aTHX);
1168
1169 /* restore swapped sv's */
1170 SWAP_SVS (coro);
1171
1172 // now save some sv's to be free'd later
1173 svf [0] = GvSV (PL_defgv);
1174 svf [1] = (SV *)GvAV (PL_defgv);
1175 svf [2] = GvSV (PL_errgv);
1176 svf [3] = (SV *)PL_defoutgv;
1177 svf [4] = PL_rs;
1178 svf [5] = GvSV (irsgv);
1179 svf [6] = (SV *)GvHV (PL_hintgv);
1180 svf [7] = PL_diehook;
1181 svf [8] = PL_warnhook;
1182 assert (9 == sizeof (svf) / sizeof (*svf));
1183
1184 load_perl (aTHX_ current);
1185 }
1186
1187 {
1188 unsigned int i;
1189
1190 for (i = 0; i < sizeof (svf) / sizeof (*svf); ++i)
1191 SvREFCNT_dec (svf [i]);
1192
1193 SvREFCNT_dec (coro->saved_deffh);
1194 SvREFCNT_dec (coro->rouse_cb);
1195 SvREFCNT_dec (coro->invoke_cb);
1196 SvREFCNT_dec (coro->invoke_av);
1197 }
1198}
1199
1200INLINE void
1201free_coro_mortal (pTHX)
1202{
1203 if (expect_true (coro_mortal))
1204 {
1205 SvREFCNT_dec (coro_mortal);
1206 coro_mortal = 0;
1207 }
1208}
1209
1210static int
1211runops_trace (pTHX)
1212{
1213 COP *oldcop = 0;
1214 int oldcxix = -2;
1215
1216 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
1217 {
1218 PERL_ASYNC_CHECK ();
1219
1220 if (cctx_current->flags & CC_TRACE_ALL)
1221 {
1222 if (PL_op->op_type == OP_LEAVESUB && cctx_current->flags & CC_TRACE_SUB)
1223 {
1224 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1225 SV **bot, **top;
1226 AV *av = newAV (); /* return values */
1227 SV **cb;
1228 dSP;
1229
1230 GV *gv = CvGV (cx->blk_sub.cv);
1231 SV *fullname = sv_2mortal (newSV (0));
1232 if (isGV (gv))
1233 gv_efullname3 (fullname, gv, 0);
1234
1235 bot = PL_stack_base + cx->blk_oldsp + 1;
1236 top = cx->blk_gimme == G_ARRAY ? SP + 1
1237 : cx->blk_gimme == G_SCALAR ? bot + 1
1238 : bot;
1239
1240 av_extend (av, top - bot);
1241 while (bot < top)
1242 av_push (av, SvREFCNT_inc_NN (*bot++));
1243
1244 PL_runops = RUNOPS_DEFAULT;
1245 ENTER;
1246 SAVETMPS;
1247 EXTEND (SP, 3);
1248 PUSHMARK (SP);
1249 PUSHs (&PL_sv_no);
1250 PUSHs (fullname);
1251 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
1252 PUTBACK;
1253 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1254 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1255 SPAGAIN;
1256 FREETMPS;
1257 LEAVE;
1258 PL_runops = runops_trace;
1259 }
1260
1261 if (oldcop != PL_curcop)
1262 {
1263 oldcop = PL_curcop;
1264
1265 if (PL_curcop != &PL_compiling)
1266 {
1267 SV **cb;
1268
1269 if (oldcxix != cxstack_ix && cctx_current->flags & CC_TRACE_SUB)
1270 {
1271 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1272
1273 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
1274 {
1275 dSP;
1276 GV *gv = CvGV (cx->blk_sub.cv);
1277 SV *fullname = sv_2mortal (newSV (0));
1278
1279 if (isGV (gv))
1280 gv_efullname3 (fullname, gv, 0);
1281
1282 PL_runops = RUNOPS_DEFAULT;
1283 ENTER;
1284 SAVETMPS;
1285 EXTEND (SP, 3);
1286 PUSHMARK (SP);
1287 PUSHs (&PL_sv_yes);
1288 PUSHs (fullname);
1289 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1290 PUTBACK;
1291 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1292 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1293 SPAGAIN;
1294 FREETMPS;
1295 LEAVE;
1296 PL_runops = runops_trace;
1297 }
1298
1299 oldcxix = cxstack_ix;
1300 }
1301
1302 if (cctx_current->flags & CC_TRACE_LINE)
1303 {
1304 dSP;
1305
1306 PL_runops = RUNOPS_DEFAULT;
1307 ENTER;
1308 SAVETMPS;
1309 EXTEND (SP, 3);
1310 PL_runops = RUNOPS_DEFAULT;
1311 PUSHMARK (SP);
1312 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1313 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1314 PUTBACK;
1315 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1316 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1317 SPAGAIN;
1318 FREETMPS;
1319 LEAVE;
1320 PL_runops = runops_trace;
1321 }
1322 }
1323 }
1324 }
1325 }
1326
1327 TAINT_NOT;
1328 return 0;
1329}
1330
1331static struct CoroSLF cctx_ssl_frame;
1332
1333static void
1334slf_prepare_set_stacklevel (pTHX_ struct coro_transfer_args *ta)
1335{
1336 ta->prev = 0;
1337}
1338
1339static int
1340slf_check_set_stacklevel (pTHX_ struct CoroSLF *frame)
1341{
1342 *frame = cctx_ssl_frame;
1343
1344 return frame->check (aTHX_ frame); /* execute the restored frame - there must be one */
1345}
1346
1347/* initialises PL_top_env and injects a pseudo-slf-call to set the stacklevel */
1348static void NOINLINE
1349cctx_prepare (pTHX)
1350{
1351 PL_top_env = &PL_start_env;
1352
1353 if (cctx_current->flags & CC_TRACE)
1354 PL_runops = runops_trace;
1355
1356 /* we already must be executing an SLF op, there is no other valid way
1357 * that can lead to creation of a new cctx */
1358 assert (("FATAL: can't prepare slf-less cctx in Coro module (please report)",
1359 slf_frame.prepare && PL_op->op_ppaddr == pp_slf));
1360
1361 /* we must emulate leaving pp_slf, which is done inside slf_check_set_stacklevel */
1362 cctx_ssl_frame = slf_frame;
1363
1364 slf_frame.prepare = slf_prepare_set_stacklevel;
1365 slf_frame.check = slf_check_set_stacklevel;
1366}
1367
1368/* the tail of transfer: execute stuff we can only do after a transfer */
1369INLINE void
1370transfer_tail (pTHX)
1371{
1372 free_coro_mortal (aTHX);
1373}
1374
1375/*
1376 * this is a _very_ stripped down perl interpreter ;)
1377 */
1378static void
1379cctx_run (void *arg)
1380{
1381#ifdef USE_ITHREADS
1382# if CORO_PTHREAD
1383 PERL_SET_CONTEXT (coro_thx);
1384# endif
1385#endif
1386 {
1387 dTHX;
1388
1389 /* normally we would need to skip the entersub here */
1390 /* not doing so will re-execute it, which is exactly what we want */
1391 /* PL_nop = PL_nop->op_next */
1392
1393 /* inject a fake subroutine call to cctx_init */
1394 cctx_prepare (aTHX);
1395
1396 /* cctx_run is the alternative tail of transfer() */
1397 transfer_tail (aTHX);
1398
1399 /* somebody or something will hit me for both perl_run and PL_restartop */
1400 PL_restartop = PL_op;
1401 perl_run (PL_curinterp);
1402 /*
1403 * Unfortunately, there is no way to get at the return values of the
1404 * coro body here, as perl_run destroys these. Likewise, we cannot catch
1405 * runtime errors here, as this is just a random interpreter, not a thread.
1406 */
1407
1408 /*
1409 * If perl-run returns we assume exit() was being called or the coro
1410 * fell off the end, which seems to be the only valid (non-bug)
1411 * reason for perl_run to return. We try to exit by jumping to the
1412 * bootstrap-time "top" top_env, as we cannot restore the "main"
1413 * coroutine as Coro has no such concept.
1414 * This actually isn't valid with the pthread backend, but OSes requiring
1415 * that backend are too broken to do it in a standards-compliant way.
1416 */
1417 PL_top_env = main_top_env;
1418 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1419 }
1420}
1421
1422static coro_cctx *
1423cctx_new ()
1424{
1425 coro_cctx *cctx;
1426
1427 ++cctx_count;
1428 New (0, cctx, 1, coro_cctx);
1429
1430 cctx->gen = cctx_gen;
1431 cctx->flags = 0;
1432 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1433
1434 return cctx;
1435}
1436
1437/* create a new cctx only suitable as source */
1438static coro_cctx *
1439cctx_new_empty ()
1440{
1441 coro_cctx *cctx = cctx_new ();
1442
1443 cctx->sptr = 0;
1444 coro_create (&cctx->cctx, 0, 0, 0, 0);
1445
1446 return cctx;
1447}
1448
1449/* create a new cctx suitable as destination/running a perl interpreter */
1450static coro_cctx *
1451cctx_new_run ()
1452{
1453 coro_cctx *cctx = cctx_new ();
1454 void *stack_start;
1455 size_t stack_size;
1456
1457#if HAVE_MMAP
1458 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1459 /* mmap supposedly does allocate-on-write for us */
1460 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1461
1462 if (cctx->sptr != (void *)-1)
1463 {
1464 #if CORO_STACKGUARD
1465 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1466 #endif
1467 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1468 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1469 cctx->flags |= CC_MAPPED;
1470 }
1471 else
1472#endif
1473 {
1474 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1475 New (0, cctx->sptr, cctx_stacksize, long);
1476
1477 if (!cctx->sptr)
1478 {
1479 perror ("FATAL: unable to allocate stack for coroutine, exiting.");
1480 _exit (EXIT_FAILURE);
1481 }
1482
1483 stack_start = cctx->sptr;
1484 stack_size = cctx->ssize;
1485 }
1486
1487 #if CORO_USE_VALGRIND
1488 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1489 #endif
1490
1491 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1492
1493 return cctx;
1494}
1495
1496static void
1497cctx_destroy (coro_cctx *cctx)
1498{
1499 if (!cctx)
1500 return;
1501
1502 assert (("FATAL: tried to destroy current cctx", cctx != cctx_current));
1503
1504 --cctx_count;
1505 coro_destroy (&cctx->cctx);
1506
1507 /* coro_transfer creates new, empty cctx's */
1508 if (cctx->sptr)
1509 {
1510 #if CORO_USE_VALGRIND
1511 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1512 #endif
1513
1514#if HAVE_MMAP
1515 if (cctx->flags & CC_MAPPED)
1516 munmap (cctx->sptr, cctx->ssize);
1517 else
1518#endif
1519 Safefree (cctx->sptr);
1520 }
1521
1522 Safefree (cctx);
1523}
1524
1525/* wether this cctx should be destructed */
1526#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1527
1528static coro_cctx *
1529cctx_get (pTHX)
1530{
1531 while (expect_true (cctx_first))
1532 {
1533 coro_cctx *cctx = cctx_first;
1534 cctx_first = cctx->next;
1535 --cctx_idle;
1536
1537 if (expect_true (!CCTX_EXPIRED (cctx)))
1538 return cctx;
1539
1540 cctx_destroy (cctx);
1541 }
1542
1543 return cctx_new_run ();
1544}
1545
1546static void
1547cctx_put (coro_cctx *cctx)
1548{
1549 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1550
1551 /* free another cctx if overlimit */
1552 if (expect_false (cctx_idle >= cctx_max_idle))
1553 {
1554 coro_cctx *first = cctx_first;
1555 cctx_first = first->next;
1556 --cctx_idle;
1557
1558 cctx_destroy (first);
1559 }
1560
1561 ++cctx_idle;
1562 cctx->next = cctx_first;
1563 cctx_first = cctx;
1564}
1565
1566/** coroutine switching *****************************************************/
1567
1568static void
1569transfer_check (pTHX_ struct coro *prev, struct coro *next)
1570{
1571 /* TODO: throwing up here is considered harmful */
1572
1573 if (expect_true (prev != next))
1574 {
1575 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1576 croak ("Coro::State::transfer called with a blocked prev Coro::State, but can only transfer from running or new states,");
1577
1578 if (expect_false (next->flags & (CF_RUNNING | CF_DESTROYED | CF_SUSPENDED)))
1579 croak ("Coro::State::transfer called with running, destroyed or suspended next Coro::State, but can only transfer to inactive states,");
1580
1581#if !PERL_VERSION_ATLEAST (5,10,0)
1582 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1583 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version,");
1584#endif
1585 }
1586}
1587
1588/* always use the TRANSFER macro */
1589static void NOINLINE /* noinline so we have a fixed stackframe */
1590transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1591{
1592 dSTACKLEVEL;
1593
1594 /* sometimes transfer is only called to set idle_sp */
1595 if (expect_false (!prev))
1596 {
1597 cctx_current->idle_sp = STACKLEVEL;
1598 assert (cctx_current->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1599 }
1600 else if (expect_true (prev != next))
1601 {
1602 coro_cctx *cctx_prev;
1603
1604 if (expect_false (prev->flags & CF_NEW))
1605 {
1606 /* create a new empty/source context */
1607 prev->flags &= ~CF_NEW;
1608 prev->flags |= CF_RUNNING;
1609 }
1610
1611 prev->flags &= ~CF_RUNNING;
1612 next->flags |= CF_RUNNING;
1613
1614 /* first get rid of the old state */
1615 save_perl (aTHX_ prev);
1616
1617 if (expect_false (next->flags & CF_NEW))
1618 {
1619 /* need to start coroutine */
1620 next->flags &= ~CF_NEW;
1621 /* setup coroutine call */
1622 init_perl (aTHX_ next);
1623 }
1624 else
1625 load_perl (aTHX_ next);
1626
1627 /* possibly untie and reuse the cctx */
1628 if (expect_true (
1629 cctx_current->idle_sp == STACKLEVEL
1630 && !(cctx_current->flags & CC_TRACE)
1631 && !force_cctx
1632 ))
1633 {
1634 /* I assume that stacklevel is a stronger indicator than PL_top_env changes */
1635 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == cctx_current->idle_te));
1636
1637 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get. */
1638 /* without this the next cctx_get might destroy the running cctx while still in use */
1639 if (expect_false (CCTX_EXPIRED (cctx_current)))
1640 if (expect_true (!next->cctx))
1641 next->cctx = cctx_get (aTHX);
1642
1643 cctx_put (cctx_current);
1644 }
1645 else
1646 prev->cctx = cctx_current;
1647
1648 ++next->usecount;
1649
1650 cctx_prev = cctx_current;
1651 cctx_current = expect_false (next->cctx) ? next->cctx : cctx_get (aTHX);
1652
1653 next->cctx = 0;
1654
1655 if (expect_false (cctx_prev != cctx_current))
1656 {
1657 cctx_prev->top_env = PL_top_env;
1658 PL_top_env = cctx_current->top_env;
1659 coro_transfer (&cctx_prev->cctx, &cctx_current->cctx);
1660 }
1661
1662 transfer_tail (aTHX);
1663 }
1664}
1665
1666#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1667#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1668
1669/** high level stuff ********************************************************/
1670
1671static void
1672coro_state_destroy (pTHX_ struct coro *coro)
1673{
1674 if (coro->flags & CF_DESTROYED)
1675 return;
1676
1677 /* this callback is reserved for slf functions needing to do cleanup */
1678 if (coro->on_destroy && !PL_dirty)
1679 coro->on_destroy (aTHX_ coro);
1680
1681 /*
1682 * The on_destroy above most likely is from an SLF call.
1683 * Since by definition the SLF call will not finish when we destroy
1684 * the coro, we will have to force-finish it here, otherwise
1685 * cleanup functions cannot call SLF functions.
1686 */
1687 coro->slf_frame.prepare = 0;
1688
1689 coro->flags |= CF_DESTROYED;
1690
1691 if (coro->flags & CF_READY)
1692 {
1693 /* reduce nready, as destroying a ready coro effectively unreadies it */
1694 /* alternative: look through all ready queues and remove the coro */
1695 --coro_nready;
1696 }
1697 else
1698 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1699
1700 if (coro->mainstack
1701 && coro->mainstack != main_mainstack
1702 && coro->slot
1703 && !PL_dirty)
1704 destroy_perl (aTHX_ coro);
1705
1706 if (coro->next) coro->next->prev = coro->prev;
1707 if (coro->prev) coro->prev->next = coro->next;
1708 if (coro == coro_first) coro_first = coro->next;
1709
1710 cctx_destroy (coro->cctx);
1711 SvREFCNT_dec (coro->startcv);
1712 SvREFCNT_dec (coro->args);
1713 SvREFCNT_dec (coro->swap_sv);
1714 SvREFCNT_dec (CORO_THROW);
1715}
1716
1717static int
1718coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1719{
1720 struct coro *coro = (struct coro *)mg->mg_ptr;
1721 mg->mg_ptr = 0;
1722
1723 coro->hv = 0;
1724
1725 if (--coro->refcnt < 0)
1726 {
1727 coro_state_destroy (aTHX_ coro);
1728 Safefree (coro);
1729 }
1730
1731 return 0;
1732}
1733
1734static int
1735coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1736{
1737 struct coro *coro = (struct coro *)mg->mg_ptr;
1738
1739 ++coro->refcnt;
1740
1741 return 0;
1742}
1743
1744static MGVTBL coro_state_vtbl = {
1745 0, 0, 0, 0,
1746 coro_state_free,
1747 0,
1748#ifdef MGf_DUP
1749 coro_state_dup,
1750#else
1751# define MGf_DUP 0
1752#endif
1753};
1754
1755static void
1756prepare_transfer (pTHX_ struct coro_transfer_args *ta, SV *prev_sv, SV *next_sv)
1757{
1758 ta->prev = SvSTATE (prev_sv);
1759 ta->next = SvSTATE (next_sv);
1760 TRANSFER_CHECK (*ta);
1761}
1762
1763static void
1764api_transfer (pTHX_ SV *prev_sv, SV *next_sv)
1765{
1766 struct coro_transfer_args ta;
1767
1768 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1769 TRANSFER (ta, 1);
1770}
1771
1772/** Coro ********************************************************************/
1773
1774INLINE void
1775coro_enq (pTHX_ struct coro *coro)
1776{
1777 struct coro **ready = coro_ready [coro->prio - CORO_PRIO_MIN];
1778
1779 SvREFCNT_inc_NN (coro->hv);
1780
1781 coro->next_ready = 0;
1782 *(ready [0] ? &ready [1]->next_ready : &ready [0]) = coro;
1783 ready [1] = coro;
1784}
1785
1786INLINE struct coro *
1787coro_deq (pTHX)
1788{
1789 int prio;
1790
1791 for (prio = CORO_PRIO_MAX - CORO_PRIO_MIN + 1; --prio >= 0; )
1792 {
1793 struct coro **ready = coro_ready [prio];
1794
1795 if (ready [0])
1796 {
1797 struct coro *coro = ready [0];
1798 ready [0] = coro->next_ready;
1799 return coro;
1800 }
1801 }
1802
1803 return 0;
1804}
1805
1806static void
1807invoke_sv_ready_hook_helper (void)
1808{
1809 dTHX;
596 dSP; 1810 dSP;
597 Coro__State ctx = (Coro__State)arg;
598 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599 1811
600 coro_init_stacks (aTHX); 1812 ENTER;
601 /*PL_curcop = 0;*/ 1813 SAVETMPS;
602 /*PL_in_eval = PL_in_eval;*/ /* inherit */
603 SvREFCNT_dec (GvAV (PL_defgv));
604 GvAV (PL_defgv) = ctx->args;
605 1814
606 SPAGAIN;
607
608 if (ctx->stack)
609 {
610 ctx->cursp = 0;
611
612 PUSHMARK(SP); 1815 PUSHMARK (SP);
613 PUTBACK; 1816 PUTBACK;
614 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL); 1817 call_sv (coro_readyhook, G_VOID | G_DISCARD);
615 1818
616 if (SvTRUE (ERRSV)) 1819 FREETMPS;
617 croak (NULL); 1820 LEAVE;
618 else 1821}
619 croak ("FATAL: CCTXT coroutine returned!"); 1822
1823static int
1824api_ready (pTHX_ SV *coro_sv)
1825{
1826 struct coro *coro = SvSTATE (coro_sv);
1827
1828 if (coro->flags & CF_READY)
1829 return 0;
1830
1831 coro->flags |= CF_READY;
1832
1833 coro_enq (aTHX_ coro);
1834
1835 if (!coro_nready++)
1836 if (coroapi.readyhook)
1837 coroapi.readyhook ();
1838
1839 return 1;
1840}
1841
1842static int
1843api_is_ready (pTHX_ SV *coro_sv)
1844{
1845 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1846}
1847
1848/* expects to own a reference to next->hv */
1849INLINE void
1850prepare_schedule_to (pTHX_ struct coro_transfer_args *ta, struct coro *next)
1851{
1852 SV *prev_sv = SvRV (coro_current);
1853
1854 ta->prev = SvSTATE_hv (prev_sv);
1855 ta->next = next;
1856
1857 TRANSFER_CHECK (*ta);
1858
1859 SvRV_set (coro_current, (SV *)next->hv);
1860
1861 free_coro_mortal (aTHX);
1862 coro_mortal = prev_sv;
1863}
1864
1865static void
1866prepare_schedule (pTHX_ struct coro_transfer_args *ta)
1867{
1868 for (;;)
620 } 1869 {
621 else 1870 struct coro *next = coro_deq (aTHX);
622 {
623 UNOP myop;
624 1871
625 PL_op = (OP *)&myop; 1872 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
656 /*FIXME*//* must set up top_env here */
657 ctx->cursp = 0;
658 PL_op = PL_op->op_next;
659 CALLRUNOPS(aTHX);
660
661 abort ();
662}
663
664STATIC void
665transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
666{
667 dSTACKLEVEL;
668 static struct coro *xnext;
669
670 if (prev != next)
671 {
672 xnext = next;
673
674 if (next->mainstack)
675 { 1873 {
676 SAVE (prev, flags); 1874 /* cannot transfer to destroyed coros, skip and look for next */
677 LOAD (next); 1875 if (expect_false (next->flags & (CF_DESTROYED | CF_SUSPENDED)))
678 1876 SvREFCNT_dec (next->hv); /* coro_nready has already been taken care of by destroy */
679 /* mark this state as in-use */ 1877 else
680 next->mainstack = 0;
681 next->tmps_ix = -2;
682
683 /* stacklevel changed? if yes, grab the stack for us! */
684 if (flags & TRANSFER_SAVE_CCTXT)
685 { 1878 {
686 if (!prev->stack) 1879 next->flags &= ~CF_READY;
687 allocate_stack (prev, 0); 1880 --coro_nready;
688 else if (prev->cursp != stacklevel 1881
689 && prev->stack->usecnt > 1) 1882 prepare_schedule_to (aTHX_ ta, next);
690 { 1883 break;
691 prev->gencnt = ++prev->stack->gencnt;
692 prev->stack->usecnt = 1;
693 }
694
695 /* has our stack been invalidated? */
696 if (next->stack && next->stack->gencnt != next->gencnt)
697 {
698 deallocate_stack (next);
699 allocate_stack (next, 1);
700 coro_create (&(next->stack->cctx),
701 continue_coro, (void *)next,
702 next->stack->sptr, labs (next->stack->ssize));
703 }
704
705 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
706 /* don't add any code here */
707 } 1884 }
708
709 } 1885 }
710 else if (next->tmps_ix == -2)
711 croak ("tried to transfer to running coroutine");
712 else 1886 else
713 { 1887 {
714 SAVE (prev, -1); /* first get rid of the old state */ 1888 /* nothing to schedule: call the idle handler */
715 1889 if (SvROK (sv_idle)
716 if (flags & TRANSFER_SAVE_CCTXT) 1890 && SvOBJECT (SvRV (sv_idle)))
717 { 1891 {
718 if (!prev->stack) 1892 if (SvRV (sv_idle) == SvRV (coro_current))
719 allocate_stack (prev, 0); 1893 croak ("FATAL: $Coro::IDLE blocked itself - did you try to block inside an event loop callback? Caught");
720 1894
721 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) 1895 ++coro_nready; /* hack so that api_ready doesn't invoke ready hook */
722 { 1896 api_ready (aTHX_ SvRV (sv_idle));
723 setup_coro (next); 1897 --coro_nready;
724
725 prev->stack->refcnt++;
726 prev->stack->usecnt++;
727 next->stack = prev->stack;
728 next->gencnt = prev->gencnt;
729 }
730 else
731 {
732 allocate_stack (next, 1);
733 coro_create (&(next->stack->cctx),
734 setup_coro, (void *)next,
735 next->stack->sptr, labs (next->stack->ssize));
736 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
737 /* don't add any code here */
738 }
739 } 1898 }
740 else 1899 else
741 setup_coro (next); 1900 {
1901 /* TODO: deprecated, remove, cannot work reliably *//*D*/
1902 dSP;
1903
1904 ENTER;
1905 SAVETMPS;
1906
1907 PUSHMARK (SP);
1908 PUTBACK;
1909 call_sv (sv_idle, G_VOID | G_DISCARD);
1910
1911 FREETMPS;
1912 LEAVE;
1913 }
742 } 1914 }
743 } 1915 }
744
745 /*
746 * xnext is now either prev or next, depending on wether
747 * we switched the c stack or not. that's why i use a global
748 * variable, that should become thread-specific at one point.
749 */
750 xnext->cursp = stacklevel;
751} 1916}
752 1917
753static struct coro * 1918INLINE void
754sv_to_coro (SV *arg, const char *funcname, const char *varname) 1919prepare_cede (pTHX_ struct coro_transfer_args *ta)
755{ 1920{
756 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV) 1921 api_ready (aTHX_ coro_current);
757 { 1922 prepare_schedule (aTHX_ ta);
758 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash); 1923}
759 1924
760 if (!he) 1925INLINE void
761 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname); 1926prepare_cede_notself (pTHX_ struct coro_transfer_args *ta)
1927{
1928 SV *prev = SvRV (coro_current);
762 1929
763 arg = HeVAL(he); 1930 if (coro_nready)
764 } 1931 {
1932 prepare_schedule (aTHX_ ta);
1933 api_ready (aTHX_ prev);
765 1934 }
766 /* must also be changed inside Coro::Cont::yield */ 1935 else
767 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash) 1936 prepare_nop (aTHX_ ta);
768 return (struct coro *) SvIV((SV*)SvRV(arg));
769
770 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
771 /*NORETURN*/
772} 1937}
773 1938
1939static void
1940api_schedule (pTHX)
1941{
1942 struct coro_transfer_args ta;
1943
1944 prepare_schedule (aTHX_ &ta);
1945 TRANSFER (ta, 1);
1946}
1947
1948static void
1949api_schedule_to (pTHX_ SV *coro_sv)
1950{
1951 struct coro_transfer_args ta;
1952 struct coro *next = SvSTATE (coro_sv);
1953
1954 SvREFCNT_inc_NN (coro_sv);
1955 prepare_schedule_to (aTHX_ &ta, next);
1956}
1957
774static void 1958static int
775api_transfer(pTHX_ SV *prev, SV *next, int flags) 1959api_cede (pTHX)
776{ 1960{
777 transfer(aTHX_ 1961 struct coro_transfer_args ta;
778 sv_to_coro (prev, "Coro::transfer", "prev"),
779 sv_to_coro (next, "Coro::transfer", "next"),
780 flags);
781}
782 1962
783/** Coro ********************************************************************/ 1963 prepare_cede (aTHX_ &ta);
784 1964
785#define PRIO_MAX 3 1965 if (expect_true (ta.prev != ta.next))
786#define PRIO_HIGH 1 1966 {
787#define PRIO_NORMAL 0 1967 TRANSFER (ta, 1);
788#define PRIO_LOW -1 1968 return 1;
789#define PRIO_IDLE -3
790#define PRIO_MIN -4
791
792/* for Coro.pm */
793static GV *coro_current, *coro_idle;
794static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
795static int coro_nready;
796
797static void
798coro_enq (SV *sv)
799{
800 if (SvROK (sv))
801 { 1969 }
802 SV *hv = SvRV (sv); 1970 else
803 if (SvTYPE (hv) == SVt_PVHV) 1971 return 0;
1972}
1973
1974static int
1975api_cede_notself (pTHX)
1976{
1977 if (coro_nready)
1978 {
1979 struct coro_transfer_args ta;
1980
1981 prepare_cede_notself (aTHX_ &ta);
1982 TRANSFER (ta, 1);
1983 return 1;
1984 }
1985 else
1986 return 0;
1987}
1988
1989static void
1990api_trace (pTHX_ SV *coro_sv, int flags)
1991{
1992 struct coro *coro = SvSTATE (coro_sv);
1993
1994 if (coro->flags & CF_RUNNING)
1995 croak ("cannot enable tracing on a running coroutine, caught");
1996
1997 if (flags & CC_TRACE)
1998 {
1999 if (!coro->cctx)
2000 coro->cctx = cctx_new_run ();
2001 else if (!(coro->cctx->flags & CC_TRACE))
2002 croak ("cannot enable tracing on coroutine with custom stack, caught");
2003
2004 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
2005 }
2006 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
2007 {
2008 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
2009
2010 if (coro->flags & CF_RUNNING)
2011 PL_runops = RUNOPS_DEFAULT;
2012 else
2013 coro->slot->runops = RUNOPS_DEFAULT;
2014 }
2015}
2016
2017static void
2018coro_call_on_destroy (pTHX_ struct coro *coro)
2019{
2020 SV **on_destroyp = hv_fetch (coro->hv, "_on_destroy", sizeof ("_on_destroy") - 1, 0);
2021
2022 if (on_destroyp)
2023 {
2024 SV **statusp = hv_fetch (coro->hv, "_status", sizeof ("_status") - 1, 0);
2025 AV *on_destroy = sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*on_destroyp)));
2026 AV *status = statusp ? sv_2mortal (SvREFCNT_inc ((AV *)SvRV (*statusp))) : 0;
2027
2028 while (AvFILLp (on_destroy) >= 0)
804 { 2029 {
805 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 2030 dSP; /* don't disturb outer sp */
806 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 2031 SV *cb = av_pop (on_destroy);
807 2032
808 prio = prio > PRIO_MAX ? PRIO_MAX 2033 PUSHMARK (SP);
809 : prio < PRIO_MIN ? PRIO_MIN 2034
2035 if (statusp)
2036 {
810 : prio; 2037 int i;
2038 EXTEND (SP, AvFILLp (status) + 1);
811 2039
812 av_push (coro_ready [prio - PRIO_MIN], sv); 2040 for (i = 0; i <= AvFILLp (status); ++i)
813 coro_nready++; 2041 PUSHs (AvARRAY (status)[i]);
2042 }
814 2043
815 return; 2044 PUTBACK;
2045 call_sv (sv_2mortal (cb), G_VOID | G_DISCARD);
816 } 2046 }
817 } 2047 }
2048}
818 2049
819 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 2050static void
2051coro_set_status (HV *coro_hv, SV **arg, int items)
2052{
2053 AV *av = newAV ();
2054
2055 /* items are actually not so common, so optimise for this case */
2056 if (items)
2057 {
2058 int i;
2059
2060 av_extend (av, items - 1);
2061
2062 for (i = 0; i < items; ++i)
2063 av_push (av, SvREFCNT_inc_NN (arg [i]));
2064 }
2065
2066 hv_store (coro_hv, "_status", sizeof ("_status") - 1, newRV_noinc ((SV *)av), 0);
2067}
2068
2069static void
2070slf_init_terminate_cancel_common (pTHX_ struct CoroSLF *frame, HV *coro_hv)
2071{
2072 av_push (av_destroy, (SV *)newRV_inc ((SV *)coro_hv)); /* RVinc for perl */
2073 api_ready (aTHX_ sv_manager);
2074
2075 frame->prepare = prepare_schedule;
2076 frame->check = slf_check_repeat;
2077
2078 /* as a minor optimisation, we could unwind all stacks here */
2079 /* but that puts extra pressure on pp_slf, and is not worth much */
2080 /*coro_unwind_stacks (aTHX);*/
2081}
2082
2083static void
2084slf_init_terminate (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2085{
2086 HV *coro_hv = (HV *)SvRV (coro_current);
2087
2088 coro_set_status (coro_hv, arg, items);
2089 slf_init_terminate_cancel_common (frame, coro_hv);
2090}
2091
2092static void
2093slf_init_cancel (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2094{
2095 HV *coro_hv;
2096 struct coro *coro;
2097
2098 if (items <= 0)
2099 croak ("Coro::cancel called without coro object,");
2100
2101 coro = SvSTATE (arg [0]);
2102 coro_hv = coro->hv;
2103
2104 coro_set_status (coro_hv, arg + 1, items - 1);
2105
2106 if (expect_false (coro->flags & CF_NOCANCEL))
2107 {
2108 /* coro currently busy cancelling something, so just notify it */
2109 coro->slf_frame.data = (void *)coro;
2110
2111 frame->prepare = prepare_nop;
2112 frame->check = slf_check_nop;
2113 }
2114 else if (coro_hv == (HV *)SvRV (coro_current))
2115 {
2116 /* cancelling the current coro is allowed, and equals terminate */
2117 slf_init_terminate_cancel_common (frame, coro_hv);
2118 }
2119 else
2120 {
2121 struct coro *self = SvSTATE_current;
2122
2123 /* otherwise we cancel directly, purely for speed reasons
2124 * unfortunately, this requires some magic trickery, as
2125 * somebody else could cancel us, so we have to fight the cancellation.
2126 * this is ugly, and hopefully fully worth the extra speed.
2127 * besides, I can't get the slow-but-safe version working...
2128 */
2129 slf_frame.data = 0;
2130 self->flags |= CF_NOCANCEL;
2131
2132 coro_state_destroy (aTHX_ coro);
2133 coro_call_on_destroy (aTHX_ coro);
2134
2135 self->flags &= ~CF_NOCANCEL;
2136
2137 if (slf_frame.data)
2138 {
2139 /* while we were busy we have been cancelled, so terminate */
2140 slf_init_terminate_cancel_common (frame, self->hv);
2141 }
2142 else
2143 {
2144 frame->prepare = prepare_nop;
2145 frame->check = slf_check_nop;
2146 }
2147 }
2148}
2149
2150/*****************************************************************************/
2151/* async pool handler */
2152
2153static int
2154slf_check_pool_handler (pTHX_ struct CoroSLF *frame)
2155{
2156 HV *hv = (HV *)SvRV (coro_current);
2157 struct coro *coro = (struct coro *)frame->data;
2158
2159 if (!coro->invoke_cb)
2160 return 1; /* loop till we have invoke */
2161 else
2162 {
2163 hv_store (hv, "desc", sizeof ("desc") - 1,
2164 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2165
2166 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2167
2168 {
2169 dSP;
2170 XPUSHs (sv_2mortal (coro->invoke_cb)); coro->invoke_cb = 0;
2171 PUTBACK;
2172 }
2173
2174 SvREFCNT_dec (GvAV (PL_defgv));
2175 GvAV (PL_defgv) = coro->invoke_av;
2176 coro->invoke_av = 0;
2177
2178 return 0;
2179 }
2180}
2181
2182static void
2183slf_init_pool_handler (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2184{
2185 HV *hv = (HV *)SvRV (coro_current);
2186 struct coro *coro = SvSTATE_hv ((SV *)hv);
2187
2188 if (expect_true (coro->saved_deffh))
2189 {
2190 /* subsequent iteration */
2191 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2192 coro->saved_deffh = 0;
2193
2194 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2195 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2196 {
2197 coro->invoke_cb = SvREFCNT_inc_NN ((SV *)cv_coro_terminate);
2198 coro->invoke_av = newAV ();
2199
2200 frame->prepare = prepare_nop;
2201 }
2202 else
2203 {
2204 av_clear (GvAV (PL_defgv));
2205 hv_store (hv, "desc", sizeof ("desc") - 1, SvREFCNT_inc_NN (sv_async_pool_idle), 0);
2206
2207 coro->prio = 0;
2208
2209 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2210 api_trace (aTHX_ coro_current, 0);
2211
2212 frame->prepare = prepare_schedule;
2213 av_push (av_async_pool, SvREFCNT_inc (hv));
2214 }
2215 }
2216 else
2217 {
2218 /* first iteration, simply fall through */
2219 frame->prepare = prepare_nop;
2220 }
2221
2222 frame->check = slf_check_pool_handler;
2223 frame->data = (void *)coro;
2224}
2225
2226/*****************************************************************************/
2227/* rouse callback */
2228
2229#define CORO_MAGIC_type_rouse PERL_MAGIC_ext
2230
2231static void
2232coro_rouse_callback (pTHX_ CV *cv)
2233{
2234 dXSARGS;
2235 SV *data = (SV *)S_GENSUB_ARG;
2236
2237 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2238 {
2239 /* first call, set args */
2240 SV *coro = SvRV (data);
2241 AV *av = newAV ();
2242
2243 SvRV_set (data, (SV *)av);
2244
2245 /* better take a full copy of the arguments */
2246 while (items--)
2247 av_store (av, items, newSVsv (ST (items)));
2248
2249 api_ready (aTHX_ coro);
2250 SvREFCNT_dec (coro);
2251 }
2252
2253 XSRETURN_EMPTY;
2254}
2255
2256static int
2257slf_check_rouse_wait (pTHX_ struct CoroSLF *frame)
2258{
2259 SV *data = (SV *)frame->data;
2260
2261 if (CORO_THROW)
2262 return 0;
2263
2264 if (SvTYPE (SvRV (data)) != SVt_PVAV)
2265 return 1;
2266
2267 /* now push all results on the stack */
2268 {
2269 dSP;
2270 AV *av = (AV *)SvRV (data);
2271 int i;
2272
2273 EXTEND (SP, AvFILLp (av) + 1);
2274 for (i = 0; i <= AvFILLp (av); ++i)
2275 PUSHs (sv_2mortal (AvARRAY (av)[i]));
2276
2277 /* we have stolen the elements, so set length to zero and free */
2278 AvFILLp (av) = -1;
2279 av_undef (av);
2280
2281 PUTBACK;
2282 }
2283
2284 return 0;
2285}
2286
2287static void
2288slf_init_rouse_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2289{
2290 SV *cb;
2291
2292 if (items)
2293 cb = arg [0];
2294 else
2295 {
2296 struct coro *coro = SvSTATE_current;
2297
2298 if (!coro->rouse_cb)
2299 croak ("Coro::rouse_wait called without rouse callback, and no default rouse callback found either,");
2300
2301 cb = sv_2mortal (coro->rouse_cb);
2302 coro->rouse_cb = 0;
2303 }
2304
2305 if (!SvROK (cb)
2306 || SvTYPE (SvRV (cb)) != SVt_PVCV
2307 || CvXSUB ((CV *)SvRV (cb)) != coro_rouse_callback)
2308 croak ("Coro::rouse_wait called with illegal callback argument,");
2309
2310 {
2311 CV *cv = (CV *)SvRV (cb); /* for S_GENSUB_ARG */
2312 SV *data = (SV *)S_GENSUB_ARG;
2313
2314 frame->data = (void *)data;
2315 frame->prepare = SvTYPE (SvRV (data)) == SVt_PVAV ? prepare_nop : prepare_schedule;
2316 frame->check = slf_check_rouse_wait;
2317 }
820} 2318}
821 2319
822static SV * 2320static SV *
823coro_deq (int min_prio) 2321coro_new_rouse_cb (pTHX)
824{ 2322{
825 int prio = PRIO_MAX - PRIO_MIN; 2323 HV *hv = (HV *)SvRV (coro_current);
2324 struct coro *coro = SvSTATE_hv (hv);
2325 SV *data = newRV_inc ((SV *)hv);
2326 SV *cb = s_gensub (aTHX_ coro_rouse_callback, (void *)data);
826 2327
827 min_prio -= PRIO_MIN; 2328 sv_magicext (SvRV (cb), data, CORO_MAGIC_type_rouse, 0, 0, 0);
828 if (min_prio < 0) 2329 SvREFCNT_dec (data); /* magicext increases the refcount */
829 min_prio = 0;
830 2330
831 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 2331 SvREFCNT_dec (coro->rouse_cb);
832 if (av_len (coro_ready[prio]) >= 0) 2332 coro->rouse_cb = SvREFCNT_inc_NN (cb);
2333
2334 return cb;
2335}
2336
2337/*****************************************************************************/
2338/* schedule-like-function opcode (SLF) */
2339
2340static UNOP slf_restore; /* restore stack as entersub did, for first-re-run */
2341static const CV *slf_cv;
2342static SV **slf_argv;
2343static int slf_argc, slf_arga; /* count, allocated */
2344static I32 slf_ax; /* top of stack, for restore */
2345
2346/* this restores the stack in the case we patched the entersub, to */
2347/* recreate the stack frame as perl will on following calls */
2348/* since entersub cleared the stack */
2349static OP *
2350pp_restore (pTHX)
2351{
2352 int i;
2353 SV **SP = PL_stack_base + slf_ax;
2354
2355 PUSHMARK (SP);
2356
2357 EXTEND (SP, slf_argc + 1);
2358
2359 for (i = 0; i < slf_argc; ++i)
2360 PUSHs (sv_2mortal (slf_argv [i]));
2361
2362 PUSHs ((SV *)CvGV (slf_cv));
2363
2364 RETURNOP (slf_restore.op_first);
2365}
2366
2367static void
2368slf_prepare_transfer (pTHX_ struct coro_transfer_args *ta)
2369{
2370 SV **arg = (SV **)slf_frame.data;
2371
2372 prepare_transfer (aTHX_ ta, arg [0], arg [1]);
2373}
2374
2375static void
2376slf_init_transfer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2377{
2378 if (items != 2)
2379 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d,", items);
2380
2381 frame->prepare = slf_prepare_transfer;
2382 frame->check = slf_check_nop;
2383 frame->data = (void *)arg; /* let's hope it will stay valid */
2384}
2385
2386static void
2387slf_init_schedule (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2388{
2389 frame->prepare = prepare_schedule;
2390 frame->check = slf_check_nop;
2391}
2392
2393static void
2394slf_prepare_schedule_to (pTHX_ struct coro_transfer_args *ta)
2395{
2396 struct coro *next = (struct coro *)slf_frame.data;
2397
2398 SvREFCNT_inc_NN (next->hv);
2399 prepare_schedule_to (aTHX_ ta, next);
2400}
2401
2402static void
2403slf_init_schedule_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2404{
2405 if (!items)
2406 croak ("Coro::schedule_to expects a coroutine argument, caught");
2407
2408 frame->data = (void *)SvSTATE (arg [0]);
2409 frame->prepare = slf_prepare_schedule_to;
2410 frame->check = slf_check_nop;
2411}
2412
2413static void
2414slf_init_cede_to (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2415{
2416 api_ready (aTHX_ SvRV (coro_current));
2417
2418 slf_init_schedule_to (aTHX_ frame, cv, arg, items);
2419}
2420
2421static void
2422slf_init_cede (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2423{
2424 frame->prepare = prepare_cede;
2425 frame->check = slf_check_nop;
2426}
2427
2428static void
2429slf_init_cede_notself (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2430{
2431 frame->prepare = prepare_cede_notself;
2432 frame->check = slf_check_nop;
2433}
2434
2435/*
2436 * these not obviously related functions are all rolled into one
2437 * function to increase chances that they all will call transfer with the same
2438 * stack offset
2439 * SLF stands for "schedule-like-function".
2440 */
2441static OP *
2442pp_slf (pTHX)
2443{
2444 I32 checkmark; /* mark SP to see how many elements check has pushed */
2445
2446 /* set up the slf frame, unless it has already been set-up */
2447 /* the latter happens when a new coro has been started */
2448 /* or when a new cctx was attached to an existing coroutine */
2449 if (expect_true (!slf_frame.prepare))
2450 {
2451 /* first iteration */
2452 dSP;
2453 SV **arg = PL_stack_base + TOPMARK + 1;
2454 int items = SP - arg; /* args without function object */
2455 SV *gv = *sp;
2456
2457 /* do a quick consistency check on the "function" object, and if it isn't */
2458 /* for us, divert to the real entersub */
2459 if (SvTYPE (gv) != SVt_PVGV
2460 || !GvCV (gv)
2461 || !(CvFLAGS (GvCV (gv)) & CVf_SLF))
2462 return PL_ppaddr[OP_ENTERSUB](aTHX);
2463
2464 if (!(PL_op->op_flags & OPf_STACKED))
833 { 2465 {
834 coro_nready--; 2466 /* ampersand-form of call, use @_ instead of stack */
835 return av_shift (coro_ready[prio]); 2467 AV *av = GvAV (PL_defgv);
2468 arg = AvARRAY (av);
2469 items = AvFILLp (av) + 1;
836 } 2470 }
2471
2472 /* now call the init function, which needs to set up slf_frame */
2473 ((coro_slf_cb)CvXSUBANY (GvCV (gv)).any_ptr)
2474 (aTHX_ &slf_frame, GvCV (gv), arg, items);
2475
2476 /* pop args */
2477 SP = PL_stack_base + POPMARK;
2478
2479 PUTBACK;
2480 }
2481
2482 /* now that we have a slf_frame, interpret it! */
2483 /* we use a callback system not to make the code needlessly */
2484 /* complicated, but so we can run multiple perl coros from one cctx */
2485
2486 do
2487 {
2488 struct coro_transfer_args ta;
2489
2490 slf_frame.prepare (aTHX_ &ta);
2491 TRANSFER (ta, 0);
2492
2493 checkmark = PL_stack_sp - PL_stack_base;
2494 }
2495 while (slf_frame.check (aTHX_ &slf_frame));
2496
2497 slf_frame.prepare = 0; /* invalidate the frame, we are done processing it */
2498
2499 /* exception handling */
2500 if (expect_false (CORO_THROW))
2501 {
2502 SV *exception = sv_2mortal (CORO_THROW);
2503
2504 CORO_THROW = 0;
2505 sv_setsv (ERRSV, exception);
2506 croak (0);
2507 }
2508
2509 /* return value handling - mostly like entersub */
2510 /* make sure we put something on the stack in scalar context */
2511 if (GIMME_V == G_SCALAR)
2512 {
2513 dSP;
2514 SV **bot = PL_stack_base + checkmark;
2515
2516 if (sp == bot) /* too few, push undef */
2517 bot [1] = &PL_sv_undef;
2518 else if (sp != bot + 1) /* too many, take last one */
2519 bot [1] = *sp;
2520
2521 SP = bot + 1;
2522
2523 PUTBACK;
2524 }
2525
2526 return NORMAL;
2527}
2528
2529static void
2530api_execute_slf (pTHX_ CV *cv, coro_slf_cb init_cb, I32 ax)
2531{
2532 int i;
2533 SV **arg = PL_stack_base + ax;
2534 int items = PL_stack_sp - arg + 1;
2535
2536 assert (("FATAL: SLF call with illegal CV value", !CvANON (cv)));
2537
2538 if (PL_op->op_ppaddr != PL_ppaddr [OP_ENTERSUB]
2539 && PL_op->op_ppaddr != pp_slf)
2540 croak ("FATAL: Coro SLF calls can only be made normally, not via goto or any other means, caught");
2541
2542 CvFLAGS (cv) |= CVf_SLF;
2543 CvXSUBANY (cv).any_ptr = (void *)init_cb;
2544 slf_cv = cv;
2545
2546 /* we patch the op, and then re-run the whole call */
2547 /* we have to put the same argument on the stack for this to work */
2548 /* and this will be done by pp_restore */
2549 slf_restore.op_next = (OP *)&slf_restore;
2550 slf_restore.op_type = OP_CUSTOM;
2551 slf_restore.op_ppaddr = pp_restore;
2552 slf_restore.op_first = PL_op;
2553
2554 slf_ax = ax - 1; /* undo the ax++ inside dAXMARK */
2555
2556 if (PL_op->op_flags & OPf_STACKED)
2557 {
2558 if (items > slf_arga)
2559 {
2560 slf_arga = items;
2561 Safefree (slf_argv);
2562 New (0, slf_argv, slf_arga, SV *);
2563 }
2564
2565 slf_argc = items;
2566
2567 for (i = 0; i < items; ++i)
2568 slf_argv [i] = SvREFCNT_inc (arg [i]);
2569 }
2570 else
2571 slf_argc = 0;
2572
2573 PL_op->op_ppaddr = pp_slf;
2574 /*PL_op->op_type = OP_CUSTOM; /* we do behave like entersub still */
2575
2576 PL_op = (OP *)&slf_restore;
2577}
2578
2579/*****************************************************************************/
2580/* dynamic wind */
2581
2582static void
2583on_enterleave_call (pTHX_ SV *cb)
2584{
2585 dSP;
2586
2587 PUSHSTACK;
2588
2589 PUSHMARK (SP);
2590 PUTBACK;
2591 call_sv (cb, G_VOID | G_DISCARD);
2592 SPAGAIN;
2593
2594 POPSTACK;
2595}
2596
2597static SV *
2598coro_avp_pop_and_free (pTHX_ AV **avp)
2599{
2600 AV *av = *avp;
2601 SV *res = av_pop (av);
2602
2603 if (AvFILLp (av) < 0)
2604 {
2605 *avp = 0;
2606 SvREFCNT_dec (av);
2607 }
2608
2609 return res;
2610}
2611
2612static void
2613coro_pop_on_enter (pTHX_ void *coro)
2614{
2615 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_enter);
2616 SvREFCNT_dec (cb);
2617}
2618
2619static void
2620coro_pop_on_leave (pTHX_ void *coro)
2621{
2622 SV *cb = coro_avp_pop_and_free (aTHX_ &((struct coro *)coro)->on_leave);
2623 on_enterleave_call (aTHX_ sv_2mortal (cb));
2624}
2625
2626/*****************************************************************************/
2627/* PerlIO::cede */
2628
2629typedef struct
2630{
2631 PerlIOBuf base;
2632 NV next, every;
2633} PerlIOCede;
2634
2635static IV
2636PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2637{
2638 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2639
2640 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
2641 self->next = nvtime () + self->every;
2642
2643 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
2644}
2645
2646static SV *
2647PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
2648{
2649 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2650
2651 return newSVnv (self->every);
2652}
2653
2654static IV
2655PerlIOCede_flush (pTHX_ PerlIO *f)
2656{
2657 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
2658 double now = nvtime ();
2659
2660 if (now >= self->next)
2661 {
2662 api_cede (aTHX);
2663 self->next = now + self->every;
2664 }
2665
2666 return PerlIOBuf_flush (aTHX_ f);
2667}
2668
2669static PerlIO_funcs PerlIO_cede =
2670{
2671 sizeof(PerlIO_funcs),
2672 "cede",
2673 sizeof(PerlIOCede),
2674 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
2675 PerlIOCede_pushed,
2676 PerlIOBuf_popped,
2677 PerlIOBuf_open,
2678 PerlIOBase_binmode,
2679 PerlIOCede_getarg,
2680 PerlIOBase_fileno,
2681 PerlIOBuf_dup,
2682 PerlIOBuf_read,
2683 PerlIOBuf_unread,
2684 PerlIOBuf_write,
2685 PerlIOBuf_seek,
2686 PerlIOBuf_tell,
2687 PerlIOBuf_close,
2688 PerlIOCede_flush,
2689 PerlIOBuf_fill,
2690 PerlIOBase_eof,
2691 PerlIOBase_error,
2692 PerlIOBase_clearerr,
2693 PerlIOBase_setlinebuf,
2694 PerlIOBuf_get_base,
2695 PerlIOBuf_bufsiz,
2696 PerlIOBuf_get_ptr,
2697 PerlIOBuf_get_cnt,
2698 PerlIOBuf_set_ptrcnt,
2699};
2700
2701/*****************************************************************************/
2702/* Coro::Semaphore & Coro::Signal */
2703
2704static SV *
2705coro_waitarray_new (pTHX_ int count)
2706{
2707 /* a waitarray=semaphore contains a counter IV in $sem->[0] and any waiters after that */
2708 AV *av = newAV ();
2709 SV **ary;
2710
2711 /* unfortunately, building manually saves memory */
2712 Newx (ary, 2, SV *);
2713 AvALLOC (av) = ary;
2714#if PERL_VERSION_ATLEAST (5,10,0)
2715 AvARRAY (av) = ary;
2716#else
2717 /* 5.8.8 needs this syntax instead of AvARRAY = ary, yet */
2718 /* -DDEBUGGING flags this as a bug, despite it perfectly working */
2719 SvPVX ((SV *)av) = (char *)ary;
2720#endif
2721 AvMAX (av) = 1;
2722 AvFILLp (av) = 0;
2723 ary [0] = newSViv (count);
2724
2725 return newRV_noinc ((SV *)av);
2726}
2727
2728/* semaphore */
2729
2730static void
2731coro_semaphore_adjust (pTHX_ AV *av, IV adjust)
2732{
2733 SV *count_sv = AvARRAY (av)[0];
2734 IV count = SvIVX (count_sv);
2735
2736 count += adjust;
2737 SvIVX (count_sv) = count;
2738
2739 /* now wake up as many waiters as are expected to lock */
2740 while (count > 0 && AvFILLp (av) > 0)
2741 {
2742 SV *cb;
2743
2744 /* swap first two elements so we can shift a waiter */
2745 AvARRAY (av)[0] = AvARRAY (av)[1];
2746 AvARRAY (av)[1] = count_sv;
2747 cb = av_shift (av);
2748
2749 if (SvOBJECT (cb))
2750 {
2751 api_ready (aTHX_ cb);
2752 --count;
2753 }
2754 else if (SvTYPE (cb) == SVt_PVCV)
2755 {
2756 dSP;
2757 PUSHMARK (SP);
2758 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2759 PUTBACK;
2760 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2761 }
2762
2763 SvREFCNT_dec (cb);
2764 }
2765}
2766
2767static void
2768coro_semaphore_on_destroy (pTHX_ struct coro *coro)
2769{
2770 /* call $sem->adjust (0) to possibly wake up some other waiters */
2771 coro_semaphore_adjust (aTHX_ (AV *)coro->slf_frame.data, 0);
2772}
2773
2774static int
2775slf_check_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, int acquire)
2776{
2777 AV *av = (AV *)frame->data;
2778 SV *count_sv = AvARRAY (av)[0];
2779
2780 /* if we are about to throw, don't actually acquire the lock, just throw */
2781 if (CORO_THROW)
2782 return 0;
2783 else if (SvIVX (count_sv) > 0)
2784 {
2785 SvSTATE_current->on_destroy = 0;
2786
2787 if (acquire)
2788 SvIVX (count_sv) = SvIVX (count_sv) - 1;
2789 else
2790 coro_semaphore_adjust (aTHX_ av, 0);
2791
2792 return 0;
2793 }
2794 else
2795 {
2796 int i;
2797 /* if we were woken up but can't down, we look through the whole */
2798 /* waiters list and only add us if we aren't in there already */
2799 /* this avoids some degenerate memory usage cases */
2800
2801 for (i = 1; i <= AvFILLp (av); ++i)
2802 if (AvARRAY (av)[i] == SvRV (coro_current))
2803 return 1;
2804
2805 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2806 return 1;
2807 }
2808}
2809
2810static int
2811slf_check_semaphore_down (pTHX_ struct CoroSLF *frame)
2812{
2813 return slf_check_semaphore_down_or_wait (aTHX_ frame, 1);
2814}
2815
2816static int
2817slf_check_semaphore_wait (pTHX_ struct CoroSLF *frame)
2818{
2819 return slf_check_semaphore_down_or_wait (aTHX_ frame, 0);
2820}
2821
2822static void
2823slf_init_semaphore_down_or_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2824{
2825 AV *av = (AV *)SvRV (arg [0]);
2826
2827 if (SvIVX (AvARRAY (av)[0]) > 0)
2828 {
2829 frame->data = (void *)av;
2830 frame->prepare = prepare_nop;
2831 }
2832 else
2833 {
2834 av_push (av, SvREFCNT_inc (SvRV (coro_current)));
2835
2836 frame->data = (void *)sv_2mortal (SvREFCNT_inc ((SV *)av));
2837 frame->prepare = prepare_schedule;
2838
2839 /* to avoid race conditions when a woken-up coro gets terminated */
2840 /* we arrange for a temporary on_destroy that calls adjust (0) */
2841 SvSTATE_current->on_destroy = coro_semaphore_on_destroy;
2842 }
2843}
2844
2845static void
2846slf_init_semaphore_down (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2847{
2848 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2849 frame->check = slf_check_semaphore_down;
2850}
2851
2852static void
2853slf_init_semaphore_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2854{
2855 if (items >= 2)
2856 {
2857 /* callback form */
2858 AV *av = (AV *)SvRV (arg [0]);
2859 SV *cb_cv = s_get_cv_croak (arg [1]);
2860
2861 av_push (av, SvREFCNT_inc_NN (cb_cv));
2862
2863 if (SvIVX (AvARRAY (av)[0]) > 0)
2864 coro_semaphore_adjust (aTHX_ av, 0);
2865
2866 frame->prepare = prepare_nop;
2867 frame->check = slf_check_nop;
2868 }
2869 else
2870 {
2871 slf_init_semaphore_down_or_wait (aTHX_ frame, cv, arg, items);
2872 frame->check = slf_check_semaphore_wait;
2873 }
2874}
2875
2876/* signal */
2877
2878static void
2879coro_signal_wake (pTHX_ AV *av, int count)
2880{
2881 SvIVX (AvARRAY (av)[0]) = 0;
2882
2883 /* now signal count waiters */
2884 while (count > 0 && AvFILLp (av) > 0)
2885 {
2886 SV *cb;
2887
2888 /* swap first two elements so we can shift a waiter */
2889 cb = AvARRAY (av)[0];
2890 AvARRAY (av)[0] = AvARRAY (av)[1];
2891 AvARRAY (av)[1] = cb;
2892
2893 cb = av_shift (av);
2894
2895 if (SvTYPE (cb) == SVt_PVCV)
2896 {
2897 dSP;
2898 PUSHMARK (SP);
2899 XPUSHs (sv_2mortal (newRV_inc ((SV *)av)));
2900 PUTBACK;
2901 call_sv (cb, G_VOID | G_DISCARD | G_EVAL | G_KEEPERR);
2902 }
2903 else
2904 {
2905 api_ready (aTHX_ cb);
2906 sv_setiv (cb, 0); /* signal waiter */
2907 }
2908
2909 SvREFCNT_dec (cb);
2910
2911 --count;
2912 }
2913}
2914
2915static int
2916slf_check_signal_wait (pTHX_ struct CoroSLF *frame)
2917{
2918 /* if we are about to throw, also stop waiting */
2919 return SvROK ((SV *)frame->data) && !CORO_THROW;
2920}
2921
2922static void
2923slf_init_signal_wait (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
2924{
2925 AV *av = (AV *)SvRV (arg [0]);
2926
2927 if (items >= 2)
2928 {
2929 SV *cb_cv = s_get_cv_croak (arg [1]);
2930 av_push (av, SvREFCNT_inc_NN (cb_cv));
2931
2932 if (SvIVX (AvARRAY (av)[0]))
2933 coro_signal_wake (aTHX_ av, 1); /* must be the only waiter */
2934
2935 frame->prepare = prepare_nop;
2936 frame->check = slf_check_nop;
2937 }
2938 else if (SvIVX (AvARRAY (av)[0]))
2939 {
2940 SvIVX (AvARRAY (av)[0]) = 0;
2941 frame->prepare = prepare_nop;
2942 frame->check = slf_check_nop;
2943 }
2944 else
2945 {
2946 SV *waiter = newSVsv (coro_current); /* owned by signal av */
2947
2948 av_push (av, waiter);
2949
2950 frame->data = (void *)sv_2mortal (SvREFCNT_inc_NN (waiter)); /* owned by process */
2951 frame->prepare = prepare_schedule;
2952 frame->check = slf_check_signal_wait;
2953 }
2954}
2955
2956/*****************************************************************************/
2957/* Coro::AIO */
2958
2959#define CORO_MAGIC_type_aio PERL_MAGIC_ext
2960
2961/* helper storage struct */
2962struct io_state
2963{
2964 int errorno;
2965 I32 laststype; /* U16 in 5.10.0 */
2966 int laststatval;
2967 Stat_t statcache;
2968};
2969
2970static void
2971coro_aio_callback (pTHX_ CV *cv)
2972{
2973 dXSARGS;
2974 AV *state = (AV *)S_GENSUB_ARG;
2975 SV *coro = av_pop (state);
2976 SV *data_sv = newSV (sizeof (struct io_state));
2977
2978 av_extend (state, items - 1);
2979
2980 sv_upgrade (data_sv, SVt_PV);
2981 SvCUR_set (data_sv, sizeof (struct io_state));
2982 SvPOK_only (data_sv);
2983
2984 {
2985 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2986
2987 data->errorno = errno;
2988 data->laststype = PL_laststype;
2989 data->laststatval = PL_laststatval;
2990 data->statcache = PL_statcache;
2991 }
2992
2993 /* now build the result vector out of all the parameters and the data_sv */
2994 {
2995 int i;
2996
2997 for (i = 0; i < items; ++i)
2998 av_push (state, SvREFCNT_inc_NN (ST (i)));
2999 }
3000
3001 av_push (state, data_sv);
3002
3003 api_ready (aTHX_ coro);
3004 SvREFCNT_dec (coro);
3005 SvREFCNT_dec ((AV *)state);
3006}
3007
3008static int
3009slf_check_aio_req (pTHX_ struct CoroSLF *frame)
3010{
3011 AV *state = (AV *)frame->data;
3012
3013 /* if we are about to throw, return early */
3014 /* this does not cancel the aio request, but at least */
3015 /* it quickly returns */
3016 if (CORO_THROW)
3017 return 0;
3018
3019 /* one element that is an RV? repeat! */
3020 if (AvFILLp (state) == 0 && SvROK (AvARRAY (state)[0]))
3021 return 1;
3022
3023 /* restore status */
3024 {
3025 SV *data_sv = av_pop (state);
3026 struct io_state *data = (struct io_state *)SvPVX (data_sv);
3027
3028 errno = data->errorno;
3029 PL_laststype = data->laststype;
3030 PL_laststatval = data->laststatval;
3031 PL_statcache = data->statcache;
3032
3033 SvREFCNT_dec (data_sv);
3034 }
3035
3036 /* push result values */
3037 {
3038 dSP;
3039 int i;
3040
3041 EXTEND (SP, AvFILLp (state) + 1);
3042 for (i = 0; i <= AvFILLp (state); ++i)
3043 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (state)[i])));
3044
3045 PUTBACK;
3046 }
837 3047
838 return 0; 3048 return 0;
839} 3049}
840 3050
841static void 3051static void
842api_ready (SV *coro) 3052slf_init_aio_req (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
843{ 3053{
844 coro_enq (SvREFCNT_inc (coro)); 3054 AV *state = (AV *)sv_2mortal ((SV *)newAV ());
845} 3055 SV *coro_hv = SvRV (coro_current);
3056 struct coro *coro = SvSTATE_hv (coro_hv);
846 3057
847static void 3058 /* put our coroutine id on the state arg */
848api_schedule (int cede) 3059 av_push (state, SvREFCNT_inc_NN (coro_hv));
849{
850 SV *prev, *next;
851 3060
852 prev = GvSV (coro_current); 3061 /* first see whether we have a non-zero priority and set it as AIO prio */
3062 if (coro->prio)
3063 {
3064 dSP;
853 3065
854 if (cede) 3066 static SV *prio_cv;
855 coro_enq (SvREFCNT_inc (prev)); 3067 static SV *prio_sv;
856 3068
857 next = coro_deq (PRIO_MIN); 3069 if (expect_false (!prio_cv))
3070 {
3071 prio_cv = (SV *)get_cv ("IO::AIO::aioreq_pri", 0);
3072 prio_sv = newSViv (0);
3073 }
858 3074
859 if (!next) 3075 PUSHMARK (SP);
860 next = SvREFCNT_inc (GvSV (coro_idle)); 3076 sv_setiv (prio_sv, coro->prio);
3077 XPUSHs (prio_sv);
861 3078
862 GvSV (coro_current) = SvREFCNT_inc (next); 3079 PUTBACK;
863 transfer (aTHX_ 3080 call_sv (prio_cv, G_VOID | G_DISCARD);
864 sv_to_coro (prev, "Coro::schedule", "current coroutine"), 3081 }
865 sv_to_coro (next, "Coro::schedule", "next coroutine"),
866 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
867 SvREFCNT_dec (next);
868 SvREFCNT_dec (prev);
869}
870 3082
3083 /* now call the original request */
3084 {
3085 dSP;
3086 CV *req = (CV *)CORO_MAGIC_NN ((SV *)cv, CORO_MAGIC_type_aio)->mg_obj;
3087 int i;
3088
3089 PUSHMARK (SP);
3090
3091 /* first push all args to the stack */
3092 EXTEND (SP, items + 1);
3093
3094 for (i = 0; i < items; ++i)
3095 PUSHs (arg [i]);
3096
3097 /* now push the callback closure */
3098 PUSHs (sv_2mortal (s_gensub (aTHX_ coro_aio_callback, (void *)SvREFCNT_inc_NN ((SV *)state))));
3099
3100 /* now call the AIO function - we assume our request is uncancelable */
3101 PUTBACK;
3102 call_sv ((SV *)req, G_VOID | G_DISCARD);
3103 }
3104
3105 /* now that the request is going, we loop till we have a result */
3106 frame->data = (void *)state;
3107 frame->prepare = prepare_schedule;
3108 frame->check = slf_check_aio_req;
3109}
3110
3111static void
3112coro_aio_req_xs (pTHX_ CV *cv)
3113{
3114 dXSARGS;
3115
3116 CORO_EXECUTE_SLF_XS (slf_init_aio_req);
3117
3118 XSRETURN_EMPTY;
3119}
3120
3121/*****************************************************************************/
3122
3123#if CORO_CLONE
3124# include "clone.c"
3125#endif
3126
3127/*****************************************************************************/
3128
3129static SV *
3130coro_new (pTHX_ HV *stash, SV **argv, int argc, int is_coro)
3131{
3132 SV *coro_sv;
3133 struct coro *coro;
3134 MAGIC *mg;
3135 HV *hv;
3136 SV *cb;
3137 int i;
3138
3139 if (argc > 0)
3140 {
3141 cb = s_get_cv_croak (argv [0]);
3142
3143 if (!is_coro)
3144 {
3145 if (CvISXSUB (cb))
3146 croak ("Coro::State doesn't support XS functions as coroutine start, caught");
3147
3148 if (!CvROOT (cb))
3149 croak ("Coro::State doesn't support autoloaded or undefined functions as coroutine start, caught");
3150 }
3151 }
3152
3153 Newz (0, coro, 1, struct coro);
3154 coro->args = newAV ();
3155 coro->flags = CF_NEW;
3156
3157 if (coro_first) coro_first->prev = coro;
3158 coro->next = coro_first;
3159 coro_first = coro;
3160
3161 coro->hv = hv = newHV ();
3162 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
3163 mg->mg_flags |= MGf_DUP;
3164 coro_sv = sv_bless (newRV_noinc ((SV *)hv), stash);
3165
3166 if (argc > 0)
3167 {
3168 av_extend (coro->args, argc + is_coro - 1);
3169
3170 if (is_coro)
3171 {
3172 av_push (coro->args, SvREFCNT_inc_NN ((SV *)cb));
3173 cb = (SV *)cv_coro_run;
3174 }
3175
3176 coro->startcv = (CV *)SvREFCNT_inc_NN ((SV *)cb);
3177
3178 for (i = 1; i < argc; i++)
3179 av_push (coro->args, newSVsv (argv [i]));
3180 }
3181
3182 return coro_sv;
3183}
3184
871MODULE = Coro::State PACKAGE = Coro::State 3185MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
872 3186
873PROTOTYPES: ENABLE 3187PROTOTYPES: DISABLE
874 3188
875BOOT: 3189BOOT:
876{ /* {} necessary for stoopid perl-5.6.x */ 3190{
877 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 3191#ifdef USE_ITHREADS
878 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 3192# if CORO_PTHREAD
3193 coro_thx = PERL_GET_CONTEXT;
3194# endif
3195#endif
3196 BOOT_PAGESIZE;
3197
3198 cctx_current = cctx_new_empty ();
3199
3200 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
3201 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3202
3203 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
3204 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
3205 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
3206
3207 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
3208 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
3209 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
3210
879 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 3211 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
880 3212
881 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 3213 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
882 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 3214 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
883 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 3215 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
884 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 3216 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
885
886 if (!padlist_cache)
887 padlist_cache = newHV ();
888 3217
889 main_mainstack = PL_mainstack; 3218 main_mainstack = PL_mainstack;
3219 main_top_env = PL_top_env;
890 3220
3221 while (main_top_env->je_prev)
3222 main_top_env = main_top_env->je_prev;
3223
3224 {
3225 SV *slf = sv_2mortal (newSViv (PTR2IV (pp_slf)));
3226
3227 if (!PL_custom_op_names) PL_custom_op_names = newHV ();
3228 hv_store_ent (PL_custom_op_names, slf, newSVpv ("coro_slf", 0), 0);
3229
3230 if (!PL_custom_op_descs) PL_custom_op_descs = newHV ();
3231 hv_store_ent (PL_custom_op_descs, slf, newSVpv ("coro schedule like function", 0), 0);
3232 }
3233
891 coroapi.ver = CORO_API_VERSION; 3234 coroapi.ver = CORO_API_VERSION;
3235 coroapi.rev = CORO_API_REVISION;
3236
892 coroapi.transfer = api_transfer; 3237 coroapi.transfer = api_transfer;
893}
894 3238
895Coro::State 3239 coroapi.sv_state = SvSTATE_;
896_newprocess(args) 3240 coroapi.execute_slf = api_execute_slf;
897 SV * args 3241 coroapi.prepare_nop = prepare_nop;
3242 coroapi.prepare_schedule = prepare_schedule;
3243 coroapi.prepare_cede = prepare_cede;
3244 coroapi.prepare_cede_notself = prepare_cede_notself;
3245
3246 time_init (aTHX);
3247
3248 assert (("PRIO_NORMAL must be 0", !CORO_PRIO_NORMAL));
3249}
3250
3251SV *
3252new (SV *klass, ...)
3253 ALIAS:
3254 Coro::new = 1
3255 CODE:
3256 RETVAL = coro_new (aTHX_ ix ? coro_stash : coro_state_stash, &ST (1), items - 1, ix);
3257 OUTPUT:
3258 RETVAL
3259
3260void
3261transfer (...)
3262 PROTOTYPE: $$
3263 CODE:
3264 CORO_EXECUTE_SLF_XS (slf_init_transfer);
3265
3266void
3267_exit (int code)
898 PROTOTYPE: $ 3268 PROTOTYPE: $
3269 CODE:
3270 _exit (code);
3271
3272SV *
3273clone (Coro::State coro)
3274 CODE:
3275{
3276#if CORO_CLONE
3277 struct coro *ncoro = coro_clone (aTHX_ coro);
3278 MAGIC *mg;
3279 /* TODO: too much duplication */
3280 ncoro->hv = newHV ();
3281 mg = sv_magicext ((SV *)ncoro->hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)ncoro, 0);
3282 mg->mg_flags |= MGf_DUP;
3283 RETVAL = sv_bless (newRV_noinc ((SV *)ncoro->hv), SvSTASH (coro->hv));
3284#else
3285 croak ("Coro::State->clone has not been configured into this installation of Coro, realised");
3286#endif
3287}
3288 OUTPUT:
3289 RETVAL
3290
3291int
3292cctx_stacksize (int new_stacksize = 0)
3293 PROTOTYPE: ;$
3294 CODE:
3295 RETVAL = cctx_stacksize;
3296 if (new_stacksize)
3297 {
3298 cctx_stacksize = new_stacksize;
3299 ++cctx_gen;
3300 }
3301 OUTPUT:
3302 RETVAL
3303
3304int
3305cctx_max_idle (int max_idle = 0)
3306 PROTOTYPE: ;$
3307 CODE:
3308 RETVAL = cctx_max_idle;
3309 if (max_idle > 1)
3310 cctx_max_idle = max_idle;
3311 OUTPUT:
3312 RETVAL
3313
3314int
3315cctx_count ()
3316 PROTOTYPE:
3317 CODE:
3318 RETVAL = cctx_count;
3319 OUTPUT:
3320 RETVAL
3321
3322int
3323cctx_idle ()
3324 PROTOTYPE:
3325 CODE:
3326 RETVAL = cctx_idle;
3327 OUTPUT:
3328 RETVAL
3329
3330void
3331list ()
3332 PROTOTYPE:
3333 PPCODE:
3334{
3335 struct coro *coro;
3336 for (coro = coro_first; coro; coro = coro->next)
3337 if (coro->hv)
3338 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
3339}
3340
3341void
3342call (Coro::State coro, SV *coderef)
3343 ALIAS:
3344 eval = 1
3345 CODE:
3346{
3347 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
3348 {
3349 struct coro *current = SvSTATE_current;
3350 struct CoroSLF slf_save;
3351
3352 if (current != coro)
3353 {
3354 PUTBACK;
3355 save_perl (aTHX_ current);
3356 load_perl (aTHX_ coro);
3357 /* the coro is most likely in an active SLF call.
3358 * while not strictly required (the code we execute is
3359 * not allowed to call any SLF functions), it's cleaner
3360 * to reinitialise the slf_frame and restore it later.
3361 * This might one day allow us to actually do SLF calls
3362 * from code executed here.
3363 */
3364 slf_save = slf_frame;
3365 slf_frame.prepare = 0;
3366 SPAGAIN;
3367 }
3368
3369 PUSHSTACK;
3370
3371 PUSHMARK (SP);
3372 PUTBACK;
3373
3374 if (ix)
3375 eval_sv (coderef, 0);
3376 else
3377 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3378
3379 POPSTACK;
3380 SPAGAIN;
3381
3382 if (current != coro)
3383 {
3384 PUTBACK;
3385 slf_frame = slf_save;
3386 save_perl (aTHX_ coro);
3387 load_perl (aTHX_ current);
3388 SPAGAIN;
3389 }
3390 }
3391}
3392
3393SV *
3394is_ready (Coro::State coro)
3395 PROTOTYPE: $
3396 ALIAS:
3397 is_ready = CF_READY
3398 is_running = CF_RUNNING
3399 is_new = CF_NEW
3400 is_destroyed = CF_DESTROYED
3401 is_suspended = CF_SUSPENDED
3402 CODE:
3403 RETVAL = boolSV (coro->flags & ix);
3404 OUTPUT:
3405 RETVAL
3406
3407void
3408throw (Coro::State self, SV *exception = &PL_sv_undef)
3409 PROTOTYPE: $;$
899 CODE: 3410 CODE:
900 Coro__State coro; 3411{
3412 struct coro *current = SvSTATE_current;
3413 SV **exceptionp = self == current ? &CORO_THROW : &self->except;
3414 SvREFCNT_dec (*exceptionp);
3415 SvGETMAGIC (exception);
3416 *exceptionp = SvOK (exception) ? newSVsv (exception) : 0;
3417}
901 3418
902 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) 3419void
903 croak ("Coro::State::_newprocess expects an arrayref"); 3420api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
3421 PROTOTYPE: $;$
3422 C_ARGS: aTHX_ coro, flags
3423
3424SV *
3425has_cctx (Coro::State coro)
3426 PROTOTYPE: $
3427 CODE:
3428 /* maybe manage the running flag differently */
3429 RETVAL = boolSV (!!coro->cctx || (coro->flags & CF_RUNNING));
3430 OUTPUT:
3431 RETVAL
3432
3433int
3434is_traced (Coro::State coro)
3435 PROTOTYPE: $
3436 CODE:
3437 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
3438 OUTPUT:
3439 RETVAL
3440
3441UV
3442rss (Coro::State coro)
3443 PROTOTYPE: $
3444 ALIAS:
3445 usecount = 1
3446 CODE:
3447 switch (ix)
3448 {
3449 case 0: RETVAL = coro_rss (aTHX_ coro); break;
3450 case 1: RETVAL = coro->usecount; break;
904 3451 }
905 New (0, coro, 1, struct coro); 3452 OUTPUT:
906
907 coro->args = (AV *)SvREFCNT_inc (SvRV (args));
908 coro->mainstack = 0; /* actual work is done inside transfer */
909 coro->stack = 0;
910
911 RETVAL = coro; 3453 RETVAL
3454
3455void
3456force_cctx ()
3457 PROTOTYPE:
3458 CODE:
3459 cctx_current->idle_sp = 0;
3460
3461void
3462swap_defsv (Coro::State self)
3463 PROTOTYPE: $
3464 ALIAS:
3465 swap_defav = 1
3466 CODE:
3467 if (!self->slot)
3468 croak ("cannot swap state with coroutine that has no saved state,");
3469 else
3470 {
3471 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
3472 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
3473
3474 SV *tmp = *src; *src = *dst; *dst = tmp;
3475 }
3476
3477void
3478cancel (Coro::State self)
3479 CODE:
3480 coro_state_destroy (aTHX_ self);
3481
3482SV *
3483enable_times (int enabled = enable_times)
3484 CODE:
3485{
3486 RETVAL = boolSV (enable_times);
3487
3488 if (enabled != enable_times)
3489 {
3490 enable_times = enabled;
3491
3492 coro_times_update ();
3493 (enabled ? coro_times_sub : coro_times_add)(SvSTATE (coro_current));
3494 }
3495}
912 OUTPUT: 3496 OUTPUT:
913 RETVAL 3497 RETVAL
914 3498
915void 3499void
916transfer(prev, next, flags) 3500times (Coro::State self)
917 Coro::State_or_hashref prev 3501 PPCODE:
918 Coro::State_or_hashref next 3502{
919 int flags 3503 struct coro *current = SvSTATE (coro_current);
920 PROTOTYPE: @ 3504
3505 if (expect_false (current == self))
3506 {
3507 coro_times_update ();
3508 coro_times_add (SvSTATE (coro_current));
3509 }
3510
3511 EXTEND (SP, 2);
3512 PUSHs (sv_2mortal (newSVnv (self->t_real [0] + self->t_real [1] * 1e-9)));
3513 PUSHs (sv_2mortal (newSVnv (self->t_cpu [0] + self->t_cpu [1] * 1e-9)));
3514
3515 if (expect_false (current == self))
3516 coro_times_sub (SvSTATE (coro_current));
3517}
3518
3519void
3520swap_sv (Coro::State coro, SV *sv, SV *swapsv)
3521 CODE:
3522{
3523 struct coro *current = SvSTATE_current;
3524
3525 if (current == coro)
3526 SWAP_SVS (current);
3527
3528 if (!coro->swap_sv)
3529 coro->swap_sv = newAV ();
3530
3531 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (sv )));
3532 av_push (coro->swap_sv, SvREFCNT_inc_NN (SvRV (swapsv)));
3533
3534 if (current == coro)
3535 SWAP_SVS (current);
3536}
3537
3538
3539MODULE = Coro::State PACKAGE = Coro
3540
3541BOOT:
3542{
3543 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
3544 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
3545 cv_coro_run = get_cv ( "Coro::_coro_run" , GV_ADD);
3546 cv_coro_terminate = get_cv ( "Coro::terminate" , GV_ADD);
3547 coro_current = coro_get_sv (aTHX_ "Coro::current" , FALSE); SvREADONLY_on (coro_current);
3548 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
3549 av_destroy = coro_get_av (aTHX_ "Coro::destroy" , TRUE);
3550 sv_manager = coro_get_sv (aTHX_ "Coro::manager" , TRUE);
3551 sv_idle = coro_get_sv (aTHX_ "Coro::idle" , TRUE);
3552
3553 sv_async_pool_idle = newSVpv ("[async pool idle]", 0); SvREADONLY_on (sv_async_pool_idle);
3554 sv_Coro = newSVpv ("Coro", 0); SvREADONLY_on (sv_Coro);
3555 cv_pool_handler = get_cv ("Coro::pool_handler", GV_ADD); SvREADONLY_on (cv_pool_handler);
3556 CvNODEBUG_on (get_cv ("Coro::_pool_handler", 0)); /* work around a debugger bug */
3557
3558 coro_stash = gv_stashpv ("Coro", TRUE);
3559
3560 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (CORO_PRIO_MAX));
3561 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (CORO_PRIO_HIGH));
3562 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (CORO_PRIO_NORMAL));
3563 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (CORO_PRIO_LOW));
3564 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (CORO_PRIO_IDLE));
3565 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (CORO_PRIO_MIN));
3566
3567 {
3568 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
3569
3570 coroapi.schedule = api_schedule;
3571 coroapi.schedule_to = api_schedule_to;
3572 coroapi.cede = api_cede;
3573 coroapi.cede_notself = api_cede_notself;
3574 coroapi.ready = api_ready;
3575 coroapi.is_ready = api_is_ready;
3576 coroapi.nready = coro_nready;
3577 coroapi.current = coro_current;
3578
3579 /*GCoroAPI = &coroapi;*/
3580 sv_setiv (sv, (IV)&coroapi);
3581 SvREADONLY_on (sv);
3582 }
3583}
3584
3585SV *
3586async (...)
3587 PROTOTYPE: &@
921 CODE: 3588 CODE:
922 PUTBACK; 3589 RETVAL = coro_new (aTHX_ coro_stash, &ST (0), items, 1);
923 transfer (aTHX_ prev, next, flags); 3590 api_ready (aTHX_ RETVAL);
924 SPAGAIN; 3591 OUTPUT:
3592 RETVAL
925 3593
926void 3594void
927DESTROY(coro) 3595_destroy (Coro::State coro)
928 Coro::State coro 3596 CODE:
929 CODE: 3597 /* used by the manager thread */
930 3598 coro_state_destroy (aTHX_ coro);
931 if (coro->mainstack && coro->mainstack != main_mainstack) 3599 coro_call_on_destroy (aTHX_ coro);
932 {
933 struct coro temp;
934
935 PUTBACK;
936 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
937 LOAD(aTHX_ coro);
938 SPAGAIN;
939
940 destroy_stacks (aTHX);
941
942 LOAD((&temp)); /* this will get rid of defsv etc.. */
943 SPAGAIN;
944
945 coro->mainstack = 0;
946 }
947
948 deallocate_stack (coro);
949
950 Safefree (coro);
951 3600
952void 3601void
953flush() 3602terminate (...)
954 CODE: 3603 CODE:
955#ifdef MAY_FLUSH 3604 CORO_EXECUTE_SLF_XS (slf_init_terminate);
956 flush_padlist_cache ();
957#endif
958 3605
959void 3606void
960_exit(code) 3607cancel (...)
961 int code 3608 CODE:
3609 CORO_EXECUTE_SLF_XS (slf_init_cancel);
3610
3611void
3612schedule (...)
3613 CODE:
3614 CORO_EXECUTE_SLF_XS (slf_init_schedule);
3615
3616void
3617schedule_to (...)
3618 CODE:
3619 CORO_EXECUTE_SLF_XS (slf_init_schedule_to);
3620
3621void
3622cede_to (...)
3623 CODE:
3624 CORO_EXECUTE_SLF_XS (slf_init_cede_to);
3625
3626void
3627cede (...)
3628 CODE:
3629 CORO_EXECUTE_SLF_XS (slf_init_cede);
3630
3631void
3632cede_notself (...)
3633 CODE:
3634 CORO_EXECUTE_SLF_XS (slf_init_cede_notself);
3635
3636void
3637_set_current (SV *current)
962 PROTOTYPE: $ 3638 PROTOTYPE: $
963 CODE: 3639 CODE:
964#if defined(__GLIBC__) || _POSIX_C_SOURCE 3640 SvREFCNT_dec (SvRV (coro_current));
965 _exit (code); 3641 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
966#else
967 signal (SIGTERM, SIG_DFL);
968 raise (SIGTERM);
969 exit (code);
970#endif
971
972MODULE = Coro::State PACKAGE = Coro::Cont
973
974# this is slightly dirty (should expose a c-level api)
975 3642
976void 3643void
977yield(...) 3644_set_readyhook (SV *hook)
978 PROTOTYPE: @ 3645 PROTOTYPE: $
979 CODE: 3646 CODE:
980 static SV *returnstk;
981 SV *sv;
982 AV *defav = GvAV (PL_defgv);
983 struct coro *prev, *next;
984
985 if (!returnstk)
986 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
987
988 /* set up @_ -- ugly */
989 av_clear (defav);
990 av_fill (defav, items - 1);
991 while (items--)
992 av_store (defav, items, SvREFCNT_inc (ST(items)));
993
994 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
995 sv = av_pop ((AV *)SvRV (returnstk));
996 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
997 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
998 SvREFCNT_dec (sv); 3647 SvREFCNT_dec (coro_readyhook);
999 3648 SvGETMAGIC (hook);
1000 transfer(aTHX_ prev, next, 0); 3649 if (SvOK (hook))
1001 3650 {
1002MODULE = Coro::State PACKAGE = Coro
1003
1004# this is slightly dirty (should expose a c-level api)
1005
1006BOOT:
1007{
1008 int i;
1009 HV *stash = gv_stashpv ("Coro", TRUE);
1010
1011 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
1012 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1013 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1014 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
1015 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1016 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
1017
1018 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1019 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1020
1021 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1022 coro_ready[i] = newAV (); 3651 coro_readyhook = newSVsv (hook);
1023 3652 CORO_READYHOOK = invoke_sv_ready_hook_helper;
1024 {
1025 SV *sv = perl_get_sv("Coro::API", 1);
1026
1027 coroapi.schedule = api_schedule;
1028 coroapi.ready = api_ready;
1029 coroapi.nready = &coro_nready;
1030 coroapi.current = coro_current;
1031
1032 GCoroAPI = &coroapi;
1033 sv_setiv(sv, (IV)&coroapi);
1034 SvREADONLY_on(sv);
1035 } 3653 }
1036} 3654 else
3655 {
3656 coro_readyhook = 0;
3657 CORO_READYHOOK = 0;
3658 }
1037 3659
1038void 3660int
3661prio (Coro::State coro, int newprio = 0)
3662 PROTOTYPE: $;$
3663 ALIAS:
3664 nice = 1
3665 CODE:
3666{
3667 RETVAL = coro->prio;
3668
3669 if (items > 1)
3670 {
3671 if (ix)
3672 newprio = coro->prio - newprio;
3673
3674 if (newprio < CORO_PRIO_MIN) newprio = CORO_PRIO_MIN;
3675 if (newprio > CORO_PRIO_MAX) newprio = CORO_PRIO_MAX;
3676
3677 coro->prio = newprio;
3678 }
3679}
3680 OUTPUT:
3681 RETVAL
3682
3683SV *
1039ready(self) 3684ready (SV *self)
1040 SV * self 3685 PROTOTYPE: $
1041 CODE: 3686 CODE:
1042 api_ready (self); 3687 RETVAL = boolSV (api_ready (aTHX_ self));
3688 OUTPUT:
3689 RETVAL
1043 3690
1044int 3691int
1045nready(...) 3692nready (...)
1046 PROTOTYPE: 3693 PROTOTYPE:
1047 CODE: 3694 CODE:
1048 RETVAL = coro_nready; 3695 RETVAL = coro_nready;
1049 OUTPUT: 3696 OUTPUT:
1050 RETVAL 3697 RETVAL
1051 3698
1052void 3699void
1053schedule(...) 3700suspend (Coro::State self)
1054 PROTOTYPE: 3701 PROTOTYPE: $
1055 ALIAS:
1056 cede = 1
1057 CODE: 3702 CODE:
1058 api_schedule (ix); 3703 self->flags |= CF_SUSPENDED;
1059 3704
3705void
3706resume (Coro::State self)
3707 PROTOTYPE: $
3708 CODE:
3709 self->flags &= ~CF_SUSPENDED;
3710
3711void
3712_pool_handler (...)
3713 CODE:
3714 CORO_EXECUTE_SLF_XS (slf_init_pool_handler);
3715
3716void
3717async_pool (SV *cv, ...)
3718 PROTOTYPE: &@
3719 PPCODE:
3720{
3721 HV *hv = (HV *)av_pop (av_async_pool);
3722 AV *av = newAV ();
3723 SV *cb = ST (0);
3724 int i;
3725
3726 av_extend (av, items - 2);
3727 for (i = 1; i < items; ++i)
3728 av_push (av, SvREFCNT_inc_NN (ST (i)));
3729
3730 if ((SV *)hv == &PL_sv_undef)
3731 {
3732 SV *sv = coro_new (aTHX_ coro_stash, (SV **)&cv_pool_handler, 1, 1);
3733 hv = (HV *)SvREFCNT_inc_NN (SvRV (sv));
3734 SvREFCNT_dec (sv);
3735 }
3736
3737 {
3738 struct coro *coro = SvSTATE_hv (hv);
3739
3740 assert (!coro->invoke_cb);
3741 assert (!coro->invoke_av);
3742 coro->invoke_cb = SvREFCNT_inc (cb);
3743 coro->invoke_av = av;
3744 }
3745
3746 api_ready (aTHX_ (SV *)hv);
3747
3748 if (GIMME_V != G_VOID)
3749 XPUSHs (sv_2mortal (newRV_noinc ((SV *)hv)));
3750 else
3751 SvREFCNT_dec (hv);
3752}
3753
3754SV *
3755rouse_cb ()
3756 PROTOTYPE:
3757 CODE:
3758 RETVAL = coro_new_rouse_cb (aTHX);
3759 OUTPUT:
3760 RETVAL
3761
3762void
3763rouse_wait (...)
3764 PROTOTYPE: ;$
3765 PPCODE:
3766 CORO_EXECUTE_SLF_XS (slf_init_rouse_wait);
3767
3768void
3769on_enter (SV *block)
3770 ALIAS:
3771 on_leave = 1
3772 PROTOTYPE: &
3773 CODE:
3774{
3775 struct coro *coro = SvSTATE_current;
3776 AV **avp = ix ? &coro->on_leave : &coro->on_enter;
3777
3778 block = s_get_cv_croak (block);
3779
3780 if (!*avp)
3781 *avp = newAV ();
3782
3783 av_push (*avp, SvREFCNT_inc (block));
3784
3785 if (!ix)
3786 on_enterleave_call (aTHX_ block);
3787
3788 LEAVE; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3789 SAVEDESTRUCTOR_X (ix ? coro_pop_on_leave : coro_pop_on_enter, (void *)coro);
3790 ENTER; /* pp_entersub unfortunately forces an ENTER/LEAVE around XS calls */
3791}
3792
3793
3794MODULE = Coro::State PACKAGE = PerlIO::cede
3795
3796BOOT:
3797 PerlIO_define_layer (aTHX_ &PerlIO_cede);
3798
3799
3800MODULE = Coro::State PACKAGE = Coro::Semaphore
3801
3802SV *
3803new (SV *klass, SV *count = 0)
3804 CODE:
3805{
3806 int semcnt = 1;
3807
3808 if (count)
3809 {
3810 SvGETMAGIC (count);
3811
3812 if (SvOK (count))
3813 semcnt = SvIV (count);
3814 }
3815
3816 RETVAL = sv_bless (
3817 coro_waitarray_new (aTHX_ semcnt),
3818 GvSTASH (CvGV (cv))
3819 );
3820}
3821 OUTPUT:
3822 RETVAL
3823
3824# helper for Coro::Channel and others
3825SV *
3826_alloc (int count)
3827 CODE:
3828 RETVAL = coro_waitarray_new (aTHX_ count);
3829 OUTPUT:
3830 RETVAL
3831
3832SV *
3833count (SV *self)
3834 CODE:
3835 RETVAL = newSVsv (AvARRAY ((AV *)SvRV (self))[0]);
3836 OUTPUT:
3837 RETVAL
3838
3839void
3840up (SV *self, int adjust = 1)
3841 ALIAS:
3842 adjust = 1
3843 CODE:
3844 coro_semaphore_adjust (aTHX_ (AV *)SvRV (self), ix ? adjust : 1);
3845
3846void
3847down (...)
3848 CODE:
3849 CORO_EXECUTE_SLF_XS (slf_init_semaphore_down);
3850
3851void
3852wait (...)
3853 CODE:
3854 CORO_EXECUTE_SLF_XS (slf_init_semaphore_wait);
3855
3856void
3857try (SV *self)
3858 PPCODE:
3859{
3860 AV *av = (AV *)SvRV (self);
3861 SV *count_sv = AvARRAY (av)[0];
3862 IV count = SvIVX (count_sv);
3863
3864 if (count > 0)
3865 {
3866 --count;
3867 SvIVX (count_sv) = count;
3868 XSRETURN_YES;
3869 }
3870 else
3871 XSRETURN_NO;
3872}
3873
3874void
3875waiters (SV *self)
3876 PPCODE:
3877{
3878 AV *av = (AV *)SvRV (self);
3879 int wcount = AvFILLp (av) + 1 - 1;
3880
3881 if (GIMME_V == G_SCALAR)
3882 XPUSHs (sv_2mortal (newSViv (wcount)));
3883 else
3884 {
3885 int i;
3886 EXTEND (SP, wcount);
3887 for (i = 1; i <= wcount; ++i)
3888 PUSHs (sv_2mortal (newRV_inc (AvARRAY (av)[i])));
3889 }
3890}
3891
3892MODULE = Coro::State PACKAGE = Coro::SemaphoreSet
3893
3894void
3895_may_delete (SV *sem, int count, int extra_refs)
3896 PPCODE:
3897{
3898 AV *av = (AV *)SvRV (sem);
3899
3900 if (SvREFCNT ((SV *)av) == 1 + extra_refs
3901 && AvFILLp (av) == 0 /* no waiters, just count */
3902 && SvIV (AvARRAY (av)[0]) == count)
3903 XSRETURN_YES;
3904
3905 XSRETURN_NO;
3906}
3907
3908MODULE = Coro::State PACKAGE = Coro::Signal
3909
3910SV *
3911new (SV *klass)
3912 CODE:
3913 RETVAL = sv_bless (
3914 coro_waitarray_new (aTHX_ 0),
3915 GvSTASH (CvGV (cv))
3916 );
3917 OUTPUT:
3918 RETVAL
3919
3920void
3921wait (...)
3922 CODE:
3923 CORO_EXECUTE_SLF_XS (slf_init_signal_wait);
3924
3925void
3926broadcast (SV *self)
3927 CODE:
3928{
3929 AV *av = (AV *)SvRV (self);
3930 coro_signal_wake (aTHX_ av, AvFILLp (av));
3931}
3932
3933void
3934send (SV *self)
3935 CODE:
3936{
3937 AV *av = (AV *)SvRV (self);
3938
3939 if (AvFILLp (av))
3940 coro_signal_wake (aTHX_ av, 1);
3941 else
3942 SvIVX (AvARRAY (av)[0]) = 1; /* remember the signal */
3943}
3944
3945IV
3946awaited (SV *self)
3947 CODE:
3948 RETVAL = AvFILLp ((AV *)SvRV (self)) + 1 - 1;
3949 OUTPUT:
3950 RETVAL
3951
3952
3953MODULE = Coro::State PACKAGE = Coro::AnyEvent
3954
3955BOOT:
3956 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
3957
3958void
3959_schedule (...)
3960 CODE:
3961{
3962 static int incede;
3963
3964 api_cede_notself (aTHX);
3965
3966 ++incede;
3967 while (coro_nready >= incede && api_cede (aTHX))
3968 ;
3969
3970 sv_setsv (sv_activity, &PL_sv_undef);
3971 if (coro_nready >= incede)
3972 {
3973 PUSHMARK (SP);
3974 PUTBACK;
3975 call_pv ("Coro::AnyEvent::_activity", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
3976 }
3977
3978 --incede;
3979}
3980
3981
3982MODULE = Coro::State PACKAGE = Coro::AIO
3983
3984void
3985_register (char *target, char *proto, SV *req)
3986 CODE:
3987{
3988 SV *req_cv = s_get_cv_croak (req);
3989 /* newXSproto doesn't return the CV on 5.8 */
3990 CV *slf_cv = newXS (target, coro_aio_req_xs, __FILE__);
3991 sv_setpv ((SV *)slf_cv, proto);
3992 sv_magicext ((SV *)slf_cv, (SV *)req_cv, CORO_MAGIC_type_aio, 0, 0, 0);
3993}
3994
3995MODULE = Coro::State PACKAGE = Coro::Select
3996
3997void
3998patch_pp_sselect ()
3999 CODE:
4000 if (!coro_old_pp_sselect)
4001 {
4002 coro_select_select = (SV *)get_cv ("Coro::Select::select", 0);
4003 coro_old_pp_sselect = PL_ppaddr [OP_SSELECT];
4004 PL_ppaddr [OP_SSELECT] = coro_pp_sselect;
4005 }
4006
4007void
4008unpatch_pp_sselect ()
4009 CODE:
4010 if (coro_old_pp_sselect)
4011 {
4012 PL_ppaddr [OP_SSELECT] = coro_old_pp_sselect;
4013 coro_old_pp_sselect = 0;
4014 }
4015

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